1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.227 2004/05/10 18:59:18 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78:
79: ######################################################################
80: ######################################################################
81: ##
82: ## Global variables
83: ##
84: ######################################################################
85: ######################################################################
86: my %groupsearch_db; # Database hash used to save values for the
87: # groupsearch RAT interface.
88: my %persistent_db; # gdbm hash which holds data which is supposed to
89: # persist across calls to lonsearchcat.pm
90:
91: # The different view modes and associated functions
92:
93: my %Views = ("detailed" => \&detailed_citation_view,
94: "summary" => \&summary_view,
95: "fielded" => \&fielded_format_view,
96: "xml" => \&xml_sgml_view,
97: "compact" => \&compact_view);
98:
99: ######################################################################
100: ######################################################################
101: sub handler {
102: my $r = shift;
103: # &set_defaults();
104: #
105: # set form defaults
106: #
107: my $hidden_fields;# Hold all the hidden fields used to keep track
108: # of the search system state
109: my $importbutton; # button to take the selected results and go to group
110: # sorting
111: my $diropendb; # The full path to the (temporary) search database file.
112: # This is set and used in &handler() and is also used in
113: # &output_results().
114: my $bodytag; # LON-CAPA standard body tag, gotten from
115: # &Apache::lonnet::bodytag.
116: # No title, no table, just a <body> tag.
117:
118: my $loaderror=&Apache::lonnet::overloaderror($r);
119: if ($loaderror) { return $loaderror; }
120: #
121: my $closebutton; # button that closes the search window
122: # This button is different for the RAT compared to
123: # normal invocation.
124: #
125: &Apache::loncommon::content_type($r,'text/html');
126: $r->send_http_header;
127: return OK if $r->header_only;
128: ##
129: ## Prevent caching of the search interface window. Hopefully this means
130: ## we will get the launch=1 passed in a little more.
131: &Apache::loncommon::no_cache($r);
132: ##
133: ## Pick up form fields passed in the links.
134: ##
135: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
136: ['catalogmode','launch','acts','mode','form','element','pause',
137: 'phase','persistent_db_id','table','start','show',
138: 'cleargroupsort','titleelement']);
139: ##
140: ## The following is a trick - we wait a few seconds if asked to so
141: ## the daemon running the search can get ahead of the daemon
142: ## printing the results. We only need (theoretically) to do
143: ## this once, so the pause indicator is deleted
144: ##
145: if (exists($ENV{'form.pause'})) {
146: sleep(1);
147: delete($ENV{'form.pause'});
148: }
149: ##
150: ## Initialize global variables
151: ##
152: my $domain = $r->dir_config('lonDefDomain');
153: $diropendb= "/home/httpd/perl/tmp/".
154: "$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
155: #
156: # set the name of the persistent database
157: # $ENV{'form.persistent_db_id'} can only have digits in it.
158: if (! exists($ENV{'form.persistent_db_id'}) ||
159: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
160: ($ENV{'form.launch'} eq '1')) {
161: $ENV{'form.persistent_db_id'} = time;
162: }
163: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
164: my $persistent_db_file = "/home/httpd/perl/tmp/".
165: &Apache::lonnet::escape($domain).
166: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
167: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
168: ##
169: &Apache::lonhtmlcommon::clear_breadcrumbs();
170: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
171: &Apache::lonhtmlcommon::add_breadcrumb
172: ({href=>'/adm/searchcat?'.
173: 'catalogmode='.$ENV{'form.catalogmode'}.
174: '&launch='.$ENV{'form.launch'}.
175: '&mode='.$ENV{'form.mode'},
176: text=>"Course and Catalog Search",
177: target=>'_top',
178: bug=>'Searching',});
179: } else {
180: &Apache::lonhtmlcommon::add_breadcrumb
181: ({href=>'/adm/searchcat?'.
182: 'catalogmode='.$ENV{'form.catalogmode'}.
183: '&launch='.$ENV{'form.launch'}.
184: '&mode='.$ENV{'form.mode'},
185: text=>"Catalog Search",
186: target=>'_top',
187: bug=>'Searching',});
188: }
189: #
190: if ($ENV{'form.phase'} !~ m/(basic|adv|course)_search/) {
191: if (! &get_persistent_form_data($persistent_db_file)) {
192: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
193: &Apache::lonnet::logthis('lonsearchcat:'.
194: 'Unable to recover data from '.
195: $persistent_db_file);
196: $r->print(<<END);
197: <html>
198: <head><title>LON-CAPA Search Error</title></head>
199: $bodytag
200: We were unable to retrieve data describing your search. This is a serious
201: error and has been logged. Please alert your LON-CAPA administrator.
202: </body>
203: </html>
204: END
205: return OK;
206: }
207: }
208: } else {
209: &clean_up_environment();
210: }
211: ##
212: ## Clear out old values from groupsearch database
213: ##
214: untie %groupsearch_db if (tied(%groupsearch_db));
215: if (($ENV{'form.cleargroupsort'} eq '1') ||
216: (($ENV{'form.launch'} eq '1') &&
217: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
218: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
219: &start_fresh_session();
220: untie %groupsearch_db;
221: delete($ENV{'form.cleargroupsort'});
222: } else {
223: # This is a stupid error to give to the user.
224: # It really tells them nothing.
225: $r->print('<html><head></head>'.$bodytag.
226: 'Unable to tie hash to db file</body></html>');
227: return OK;
228: }
229: }
230: ##
231: ## Configure hidden fields
232: ##
233: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
234: $ENV{'form.persistent_db_id'}.'" />'."\n";
235: if (exists($ENV{'form.catalogmode'})) {
236: $hidden_fields .= &hidden_field('catalogmode');
237: }
238: if (exists($ENV{'form.form'})) {
239: $hidden_fields .= &hidden_field('form');
240: }
241: if (exists($ENV{'form.element'})) {
242: $hidden_fields .= &hidden_field('element');
243: }
244: if (exists($ENV{'form.titleelement'})) {
245: $hidden_fields .= &hidden_field('titleelement');
246: }
247: if (exists($ENV{'form.mode'})) {
248: $hidden_fields .= &hidden_field('mode');
249: }
250: ##
251: ## Configure dynamic components of interface
252: ##
253: if ($ENV{'form.catalogmode'} eq 'interactive') {
254: $closebutton="<input type='button' name='close' value='CLOSE' ";
255: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
256: $closebutton .="onClick='parent.close()'";
257: } else {
258: $closebutton .="onClick='self.close()'";
259: }
260: $closebutton .=">\n";
261: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
262: $closebutton="<input type='button' name='close' value='CLOSE' ";
263: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
264: $closebutton .="onClick='parent.close()'";
265: } else {
266: $closebutton .="onClick='self.close()'";
267: }
268: $closebutton .= ">";
269: $importbutton=<<END;
270: <input type='button' name='import' value='IMPORT'
271: onClick='javascript:select_group()'>
272: END
273: } else {
274: $closebutton = '';
275: $importbutton = '';
276: }
277: ##
278: ## Sanity checks on form elements
279: ##
280: if (!defined($ENV{'form.viewselect'})) {
281: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
282: ($ENV{'form.catalogmode'} eq 'interactive')) {
283: $ENV{'form.viewselect'} ="Compact View";
284: } else {
285: $ENV{'form.viewselect'} ="Detailed Citation View";
286: }
287: }
288: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
289: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
290: #
291: $ENV{'form.searchmode'} = 'basic' if (! exists($ENV{'form.searchmode'}));
292: if ($ENV{'form.phase'} eq 'adv_search' ||
293: $ENV{'form.phase'} eq 'disp_adv') {
294: $ENV{'form.searchmode'} = 'advanced';
295: } elsif ($ENV{'form.phase'} eq 'course_search') {
296: $ENV{'form.searchmode'} = 'course_search';
297: }
298: #
299: if ($ENV{'form.searchmode'} eq 'advanced') {
300: &Apache::lonhtmlcommon::add_breadcrumb
301: ({href=>'/adm/searchcat?phase=disp_adv&'.
302: 'catalogmode='.$ENV{'form.catalogmode'}.
303: '&launch='.$ENV{'form.launch'}.
304: '&mode='.$ENV{'form.mode'},
305: text=>"Advanced Search",
306: bug=>'Searching',});
307: } elsif ($ENV{'form.searchmode'} eq 'course search') {
308: &Apache::lonhtmlcommon::add_breadcrumb
309: ({href=>'/adm/searchcat?phase=disp_adv&'.
310: 'catalogmode='.$ENV{'form.catalogmode'}.
311: '&launch='.$ENV{'form.launch'}.
312: '&mode='.$ENV{'form.mode'},
313: text=>"Course Search",
314: bug=>'Searching',});
315: }
316: ##
317: ## Switch on the phase
318: ##
319: if ($ENV{'form.phase'} eq 'disp_basic') {
320: &print_basic_search_form($r,$closebutton,$hidden_fields);
321: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
322: &print_advanced_search_form($r,$closebutton,$hidden_fields);
323: } elsif ($ENV{'form.phase'} eq 'results') {
324: &display_results($r,$importbutton,$closebutton,$diropendb);
325: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
326: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
327: &get_persistent_data($persistent_db_file,
328: ['query','customquery','customshow',
329: 'libraries','pretty_string']);
330: if ($ENV{'form.phase'} eq 'sort') {
331: &print_sort_form($r,$pretty_string);
332: } elsif ($ENV{'form.phase'} eq 'run_search') {
333: &run_search($r,$query,$customquery,$customshow,
334: $libraries,$pretty_string);
335: }
336: } elsif ($ENV{'form.phase'} eq 'course_search') {
337: &course_search($r);
338: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
339: ($ENV{'form.phase'} eq 'adv_search')) {
340: # Set up table
341: if (! defined(&create_results_table())) {
342: my $errorstring=&Apache::lonmysql::get_error();
343: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
344: 'needed table. lonmysql error:'.
345: $errorstring);
346: $r->print(<<END);
347: <html><head><title>Search Error</title></head>
348: $bodytag
349: Unable to create table in which to store search results.
350: The search has been aborted.
351: </body>
352: </html>
353: END
354: return OK;
355: }
356: delete($ENV{'form.launch'});
357: if (! &make_form_data_persistent($r,$persistent_db_file)) {
358: $r->print(<<END);
359: <html><head><title>Search Error</title></head>
360: $bodytag
361: Unable to properly store search information. The search has been aborted.
362: </body>
363: </html>
364: END
365: return OK;
366: }
367: #
368: # We are running a search
369: my ($query,$customquery,$customshow,$libraries) =
370: (undef,undef,undef,undef);
371: my $pretty_string;
372: if ($ENV{'form.phase'} eq 'basic_search') {
373: ($query,$pretty_string,$libraries) =
374: &parse_basic_search($r,$closebutton,$hidden_fields);
375: } else { # Advanced search
376: ($query,$customquery,$customshow,$libraries,$pretty_string)
377: = &parse_advanced_search($r,$closebutton,$hidden_fields);
378: return OK if (! defined($query));
379: }
380: &make_persistent({ query => $query,
381: customquery => $customquery,
382: customshow => $customshow,
383: libraries => $libraries,
384: pretty_string => $pretty_string },
385: $persistent_db_file);
386: ##
387: ## Print out the frames interface
388: ##
389: &print_frames_interface($r);
390: }
391: return OK;
392: }
393:
394: #
395: # The mechanism used to store values away and retrieve them does not
396: # handle the case of missing environment variables being significant.
397: #
398: # This routine sets non existant checkbox form elements to ''.
399: #
400: sub clean_up_environment {
401: if ($ENV{'form.phase'} eq 'basic_search') {
402: if (! exists($ENV{'form.related'})) {
403: $ENV{'form.related'} = '';
404: }
405: if (! exists($ENV{'form.domains'})) {
406: $ENV{'form.domains'} = '';
407: }
408: } elsif ($ENV{'form.phase'} eq 'adv_search') {
409: foreach my $field ('title','keywords','notes',
410: 'abstract','standards','mime') {
411: if (! exists($ENV{'form.'.$field.'_related'})) {
412: $ENV{'form.'.$field.'_related'} = '';
413: }
414: }
415: } elsif ($ENV{'form.phase'} eq 'course_search') {
416: if (! exists($ENV{'form.crsrelated'})) {
417: $ENV{'form.crsrelated'} = '';
418: }
419: }
420: }
421:
422: sub hidden_field {
423: my ($name,$value) = @_;
424: if (! defined($value)) {
425: $value = $ENV{'form.'.$name};
426: }
427: return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
428: }
429:
430: ######################################################################
431: ######################################################################
432: ##
433: ## Course Search
434: ##
435: ######################################################################
436: ######################################################################
437: { # Scope the course search to avoid global variables
438: #
439: # Variables For course search
440: my %alreadyseen;
441: my %hash;
442: my $totalfound;
443:
444: sub course_search {
445: my $r=shift;
446: my $bodytag=&Apache::loncommon::bodytag('Course Search');
447: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
448: my $search_string = $ENV{'form.courseexp'};
449: my @New_Words;
450: if ($ENV{'form.crsrelated'}) {
451: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
452: if (@New_Words) {
453: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
454: } else {
455: $pretty_search_string .= ' '.&mt('with no related words').".";
456: }
457: }
458: my $fulltext=$ENV{'form.crsfulltext'};
459: my @allwords=($search_string,@New_Words);
460: $totalfound=0;
461: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
462: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
463: $r->rflush();
464: # ======================================================= Go through the course
465: undef %alreadyseen;
466: %alreadyseen=();
467: my $c=$r->connection;
468: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
469: &GDBM_READER(),0640)) {
470: foreach (keys %hash) {
471: if ($c->aborted()) { last; }
472: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
473: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
474: @allwords);
475: }
476: }
477: untie(%hash);
478: }
479: unless ($totalfound) {
480: $r->print('<p>'.&mt('No resources found').'.</p>');
481: }
482: # =================================================== Done going through course
483: $r->print('</body></html>');
484: }
485:
486: # =============================== This pulls up a resource and its dependencies
487:
488: sub checkonthis {
489: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
490: $alreadyseen{$url}=1;
491: $r->rflush();
492: my $result=&Apache::lonnet::metadata($url,'title').' '.
493: &Apache::lonnet::metadata($url,'subject').' '.
494: &Apache::lonnet::metadata($url,'abstract').' '.
495: &Apache::lonnet::metadata($url,'keywords');
496: if (($url) && ($fulltext)) {
497: $result.=&Apache::lonnet::ssi_body($url);
498: }
499: $result=~s/\s+/ /gs;
500: my $applies=0;
501: foreach (@allwords) {
502: if ($_=~/\w/) {
503: if ($result=~/$_/si) {
504: $applies++;
505: }
506: }
507: }
508: # Does this resource apply?
509: if ($applies) {
510: $r->print('<br />');
511: for (my $i=0;$i<=$level*5;$i++) {
512: $r->print(' ');
513: }
514: $r->print('<a href="'.$url.'" target="cat">'.
515: ($title?$title:$url).'</a><br />');
516: $totalfound++;
517: } elsif ($fulltext) {
518: $r->print(' .');
519: }
520: $r->rflush();
521: # Check also the dependencies of this one
522: my $dependencies=
523: &Apache::lonnet::metadata($url,'dependencies');
524: foreach (split(/\,/,$dependencies)) {
525: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
526: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
527: }
528: }
529: }
530:
531: sub untiehash {
532: if (tied(%hash)) {
533: untie(%hash);
534: }
535: }
536:
537: } # End of course search scoping
538:
539: sub search_html_header {
540: my $Str = <<ENDHEADER;
541: <html>
542: <head>
543: <title>The LearningOnline Network with CAPA</title>
544: </head>
545: ENDHEADER
546: return $Str;
547: }
548:
549: ######################################################################
550: ######################################################################
551:
552: =pod
553:
554: =item &print_basic_search_form()
555:
556: Prints the form for the basic search. Sorry the name is so cryptic.
557:
558: =cut
559:
560: ######################################################################
561: ######################################################################
562: sub print_basic_search_form {
563: my ($r,$closebutton,$hidden_fields) = @_;
564: my $result = ($ENV{'form.catalogmode'} ne 'groupsearch');
565: my $bodytag=&Apache::loncommon::bodytag('Search').
566: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
567: undef,undef,
568: $ENV{'form.catalogmode'} ne 'groupsearch');
569: my $scrout = &search_html_header().$bodytag;
570: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
571: # Define interface components
572: my $userelatedwords=
573: &mt('[_1] use related words',
574: &Apache::lonhtmlcommon::checkbox
575: ('related',$ENV{'form.related'},'related'));
576: my $onlysearchdomain=
577: &mt('[_1] only search domain [_2]',
578: &Apache::lonhtmlcommon::checkbox('domains',
579: $ENV{'form.domains'},
580: $r->dir_config('lonDefDomain')
581: ),
582: $r->dir_config('lonDefDomain')
583: );
584: my $adv_search_link =
585: '<a href="/adm/searchcat?'.
586: 'phase=disp_adv&'.
587: 'catalogmode='.$ENV{'form.catalogmode'}.
588: '&launch='.$ENV{'form.launch'}.
589: '&mode='.$ENV{'form.mode'}.
590: '">'.&mt('Advanced Search').'</a>';
591: #
592: $scrout.='<form name="loncapa_search" method="post" '.
593: 'action="/adm/searchcat">'.
594: '<input type="hidden" name="phase" value="basic_search" />'.
595: $hidden_fields;
596: #
597: $scrout .= '<center>'.$/;
598: if ($ENV{'request.course.id'}) {
599: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
600: } else {
601: # No need to tell them they are searching
602: $scrout.= ('<br />'x2);
603: }
604: $scrout.='<table>'.
605: '<tr><td align="center" valign="top">'.
606: &Apache::lonhtmlcommon::textbox('basicexp',
607: $ENV{'form.basicexp'},50).'<br />'.
608: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
609: '<td><font size="-1">'.
610: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
611: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
612: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
613: '</font></td>'.
614: '</tr>'.$/;
615: #
616: # $scrout .= '<tr><td align="center">'.
617: # '<font size="-1">'.
618: # $userelatedwords.(' 'x3).
619: # $onlysearchdomain.(' 'x2).$adv_search_link.
620: # '</font>'.
621: # '</td></tr>'.$/;
622: $scrout .= '<tr><td align="center" colspan="2">'.
623: '<font size="-1">'.
624: '<input type="submit" name="basicsubmit" '.
625: 'value="'.&mt('Search').'" />'.
626: (' 'x2).$closebutton.(' 'x2).
627: &viewoptions().
628: '</font>'.
629: '</td></tr>'.$/;
630: $scrout .= '</table>'.$/.'</center>'.'</form>';
631: }
632: if ($ENV{'request.course.id'}) {
633: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
634: 'header' => 'Course Search',
635: 'note' => 'Enter terms or phrases, then press "Search" below',
636: 'use' => 'use related words',
637: 'full' =>'fulltext search (time consuming)'
638: );
639: $scrout.=(<<ENDCOURSESEARCH);
640: <form name="loncapa_search" method="post" action="/adm/searchcat">
641: <center>
642: <hr />
643: <h1>$lt{'header'}</h1>
644: <input type="hidden" name="phase" value="course_search" />
645: $hidden_fields
646: <p>
647: $lt{'note'}.
648: </p>
649: <p>
650: <table>
651: <tr><td>
652: ENDCOURSESEARCH
653: $scrout.=' '.
654: &Apache::lonhtmlcommon::textbox('courseexp',
655: $ENV{'form.courseexp'},40);
656: my $crscheckbox =
657: &Apache::lonhtmlcommon::checkbox('crsfulltext',
658: $ENV{'form.crsfulltext'});
659: my $relcheckbox =
660: &Apache::lonhtmlcommon::checkbox('crsrelated',
661: $ENV{'form.crsrelated'});
662: $scrout.=(<<ENDENDCOURSE);
663: </td></tr>
664: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
665: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
666: </table><p>
667: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
668: </p>
669: </center>
670: </form>
671: ENDENDCOURSE
672: }
673: $scrout.=(<<ENDDOCUMENT);
674: </body>
675: </html>
676: ENDDOCUMENT
677: $r->print($scrout);
678: return;
679: }
680: ######################################################################
681: ######################################################################
682:
683: =pod
684:
685: =item &advanced_search_form()
686:
687: Prints the advanced search form.
688:
689: =cut
690:
691: ######################################################################
692: ######################################################################
693: sub print_advanced_search_form{
694: my ($r,$closebutton,$hidden_fields) = @_;
695: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
696: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
697: undef,undef,
698: $ENV{'form.catalogmode'} ne 'groupsearch');
699: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
700: 'reset' => 'Reset',
701: 'help' => 'Help');
702: my $advanced_buttons=<<"END";
703: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
704: <input type="reset" name="reset" value='$lt{"reset"}' />
705: $closebutton
706: END
707: my $scrout=&search_html_header();
708: $scrout .= <<"ENDHEADER";
709: $bodytag
710: <form method="post" action="/adm/searchcat" name="advsearch">
711: <p>
712: $advanced_buttons
713: ENDHEADER
714: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
715: '<input type="hidden" name="phase" value="adv_search" />';
716: my %fields=&Apache::lonmeta::fieldnames();
717: #
718: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
719: $scrout .= "<table>\n";
720: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
721: (' 'x2).&searchhelp()."</font></td></tr>\n";
722: my %related_word_search =
723: ('title' => 1,
724: 'author' => 0,
725: 'owner' => 0,
726: 'authorspace' => 0,
727: 'modifyinguser'=> 0,
728: 'keywords' => 1,
729: 'notes' => 1,
730: 'abstract' => 1,
731: 'standards'=> 1,
732: 'mime' => 1,
733: );
734: #
735: foreach my $field ('title','author','owner','authorspace','modifyinguser',
736: 'keywords','notes','abstract','standards','mime') {
737: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
738: &Apache::lonmeta::prettyinput($field,
739: $ENV{'form.'.$field},
740: $field,
741: 'advsearch',
742: $related_word_search{$field},
743: '</td><td align="left">',
744: $ENV{'form.'.$field.'_related'},
745: 50);
746: if ($related_word_search{$field}) {
747: $scrout .= 'related words';
748: } else {
749: $scrout .= '</td><td> ';
750: }
751: $scrout .= '</td></tr>'.$/;
752: }
753: foreach my $field ('lowestgradelevel','highestgradelevel') {
754: $scrout.='<tr>'.
755: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
756: '<td colspan="2">'.
757: &Apache::lonmeta::prettyinput($field,
758: $ENV{'form.'.$field},
759: $field,
760: 'advsearch',
761: 0).
762: '</td></tr>'.$/;
763: }
764: $scrout.='<tr><td align="right">'.
765: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
766: &Apache::loncommon::filecategoryselect('category',
767: $ENV{'form.category'}).
768: '</td></tr>'.$/;
769: $scrout.='<tr><td align="right" valign="top">'.
770: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
771: &Apache::loncommon::domain_select('domains',
772: $ENV{'form.domains'},1).
773: '</td></tr>'.$/;
774: #
775: # Misc metadata
776: $scrout.='<tr><td align="right" valign="top">'.
777: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
778: &Apache::lonmeta::selectbox('copyright',
779: '',,
780: \&Apache::loncommon::copyrightdescription,
781: ( undef,
782: &Apache::loncommon::copyrightids)
783: ).'</td></tr>'.$/;
784: $scrout.='<tr><td align="right" valign="top">'.
785: &titlefield(&mt('Language')).'</td><td colspan="2">'.
786: &Apache::lonmeta::selectbox('language',
787: 'notset',,
788: \&Apache::loncommon::languagedescription,
789: ('any',&Apache::loncommon::languageids)
790: ).'</td></tr>';
791: $scrout .= "</table>\n";
792: #
793: # Dynamic metadata
794: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
795: $scrout .= "<table>\n";
796: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
797: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
798: foreach my $statistic
799: ({ name=>'count',
800: description=>'Network-wide number of accesses (hits)',},
801: { name=>'stdno',
802: description=>
803: 'Total number of students who have worked on this problem',},
804: { name => 'avetries',
805: description=>'Average number of tries till solved',},
806: { name => 'difficulty',
807: description=>'Degree of difficulty',},
808: { name => 'disc',
809: description=>'Degree of discrimination'}) {
810: $scrout .= '<tr><td align="right">'.
811: &titlefield(&mt($statistic->{'description'})).
812: '</td><td align="center">'.
813: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
814: 'value="" size="6" />'.
815: '</td><td align="center">'.
816: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
817: 'value="" size="6" />'.
818: '</td></tr>'.$/;
819: }
820: $scrout .= "</table>\n";
821: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
822: $scrout .= "<table>\n";
823: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
824: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
825: foreach my $evaluation
826: ( { name => 'clear',
827: description => 'Material presented in clear way'},
828: { name =>'depth',
829: description => 'Material covered with sufficient depth'},
830: { name => 'helpful',
831: description => 'Material is helpful'},
832: { name => 'correct',
833: description => 'Material appears to be correct'},
834: { name => 'technical',
835: description => 'Resource is technically correct'}){
836: $scrout .= '<tr><td align="right">'.
837: &titlefield(&mt($evaluation->{'description'})).
838: '</td><td align="center">'.
839: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
840: 'value="" size="6" />'.
841: '</td><td align="center">'.
842: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
843: 'value="" size="6" />'.
844: '</td></tr>'.$/;
845: }
846: $scrout .= "</table>\n";
847: #
848: # Creation/Modification date limits
849: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
850: $scrout .= "\n<table>\n";
851: my $cafter =
852: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
853: 'creationdate1', # fieldname
854: 0, # current value
855: '', # special
856: 1, # includeempty
857: '', # state
858: 1, # no_hh_mm_ss
859: );
860: my $cbefore =
861: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
862: 'creationdate2', # fieldname
863: 0, # current value
864: '', # special
865: 1, # includeempty
866: '', # state
867: 1, # no_hh_mm_ss
868: );
869: $scrout .= &mt('<tr><td align="right">Created between</td>'.
870: '<td>[_1]</td></tr>'.
871: '<tr><td align="right">and </td>'.
872: '<td>[_2]</td></tr>',$cafter,$cbefore);
873: my $lafter =
874: &Apache::lonhtmlcommon::date_setter('advsearch',
875: 'revisiondate1',
876: 0, # current value
877: '', # special
878: 1, # includeempty
879: '', # state
880: 1, # no_hh_mm_ss
881: );
882: my $lbefore =
883: &Apache::lonhtmlcommon::date_setter('advsearch',
884: 'revisiondate2',
885: 0, # current value
886: '', # special
887: 1, # includeempty
888: '', # state
889: 1, # no_hh_mm_ss
890: );
891: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
892: '<td>[_1]</td></tr>'.
893: '<tr><td align="right">and</td>'.
894: '<td>[_2]</td></tr>',$lafter,$lbefore);
895: $scrout.="</table>\n";
896: $scrout.=<<ENDDOCUMENT;
897: $advanced_buttons
898: </form>
899: </body>
900: </html>
901: ENDDOCUMENT
902: $r->print($scrout);
903: return;
904: }
905:
906: ######################################################################
907: ######################################################################
908:
909: =pod
910:
911: =item &titlefield()
912:
913: Inputs: title text
914:
915: Outputs: titletext with font wrapper
916:
917: =cut
918:
919: ######################################################################
920: ######################################################################
921: sub titlefield {
922: my $title=shift;
923: return $title;
924: }
925:
926: ######################################################################
927: ######################################################################
928:
929: =pod
930:
931: =item viewoptiontext()
932:
933: Inputs: codename for view option
934:
935: Outputs: displayed text
936:
937: =cut
938:
939: ######################################################################
940: ######################################################################
941: sub viewoptiontext {
942: my $code=shift;
943: my %desc=&Apache::lonlocal::texthash
944: ('detailed' => "Detailed Citation View",
945: 'xml' => 'XML/SGML',
946: 'compact' => 'Compact View',
947: 'fielded' => 'Fielded Format',
948: 'summary' => 'Summary View');
949: return $desc{$code};
950: }
951:
952: ######################################################################
953: ######################################################################
954:
955: =pod
956:
957: =item viewoptions()
958:
959: Inputs: none
960:
961: Outputs: text for box with view options
962:
963: =cut
964:
965: ######################################################################
966: ######################################################################
967: sub viewoptions {
968: my $scrout;
969: if (! defined($ENV{'form.viewselect'})) {
970: $ENV{'form.viewselect'}='detailed';
971: }
972: $scrout.=&Apache::lonmeta::selectbox('viewselect',
973: $ENV{'form.viewselect'},
974: \&viewoptiontext,
975: sort(keys(%Views)));
976: $scrout.= ' ';
977: my $countselect = &Apache::lonmeta::selectbox('show',
978: $ENV{'form.show'},
979: undef,
980: (10,20,50,100,1000,10000));
981: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
982: '</nobr>'.$/;
983: return $scrout;
984: }
985:
986: ######################################################################
987: ######################################################################
988:
989: =pod
990:
991: =item searchhelp()
992:
993: Inputs: none
994:
995: Outputs: return little blurb on how to enter searches
996:
997: =cut
998:
999: ######################################################################
1000: ######################################################################
1001: sub searchhelp {
1002: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
1003: }
1004:
1005: ######################################################################
1006: ######################################################################
1007:
1008: =pod
1009:
1010: =item &get_persistent_form_data()
1011:
1012: Inputs: filename of database
1013:
1014: Outputs: returns undef on database errors.
1015:
1016: This function is the reverse of &make_persistent() for form data.
1017: Retrieve persistent data from %persistent_db. Retrieved items will have their
1018: values unescaped. If a form value already exists in $ENV, it will not be
1019: overwritten. Form values that are array references may have values appended
1020: to them.
1021:
1022: =cut
1023:
1024: ######################################################################
1025: ######################################################################
1026: sub get_persistent_form_data {
1027: my $filename = shift;
1028: return 0 if (! -e $filename);
1029: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1030: &GDBM_READER(),0640));
1031: #
1032: # These make sure we do not get array references printed out as 'values'.
1033: my %arrays_allowed = ('form.domains'=>1);
1034: #
1035: # Loop through the keys, looking for 'form.'
1036: foreach my $name (keys(%persistent_db)) {
1037: next if ($name !~ /^form./);
1038: # Kludgification begins!
1039: if ($name eq 'form.domains' &&
1040: $ENV{'form.searchmode'} eq 'basic' &&
1041: $ENV{'form.phase'} ne 'disp_basic') {
1042: next;
1043: }
1044: # End kludge (hopefully)
1045: next if (exists($ENV{$name}));
1046: my @values = map {
1047: &Apache::lonnet::unescape($_);
1048: } split(',',$persistent_db{$name});
1049: next if (@values <1);
1050: if ($arrays_allowed{$name}) {
1051: $ENV{$name} = [@values];
1052: } else {
1053: $ENV{$name} = $values[0] if ($values[0]);
1054: }
1055: }
1056: untie (%persistent_db);
1057: return 1;
1058: }
1059:
1060: ######################################################################
1061: ######################################################################
1062:
1063: =pod
1064:
1065: =item &get_persistent_data()
1066:
1067: Inputs: filename of database, ref to array of values to recover.
1068:
1069: Outputs: array of values. Returns undef on error.
1070:
1071: This function is the reverse of &make_persistent();
1072: Retrieve persistent data from %persistent_db. Retrieved items will have their
1073: values unescaped. If the item contains commas (before unescaping), the
1074: returned value will be an array pointer.
1075:
1076: =cut
1077:
1078: ######################################################################
1079: ######################################################################
1080: sub get_persistent_data {
1081: my $filename = shift;
1082: my @Vars = @{shift()};
1083: my @Values; # Return array
1084: return undef if (! -e $filename);
1085: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1086: &GDBM_READER(),0640));
1087: foreach my $name (@Vars) {
1088: if (! exists($persistent_db{$name})) {
1089: push @Values, undef;
1090: next;
1091: }
1092: my @values = map {
1093: &Apache::lonnet::unescape($_);
1094: } split(',',$persistent_db{$name});
1095: if (@values <= 1) {
1096: push @Values,$values[0];
1097: } else {
1098: push @Values,\@values;
1099: }
1100: }
1101: untie (%persistent_db);
1102: return @Values;
1103: }
1104:
1105: ######################################################################
1106: ######################################################################
1107:
1108: =pod
1109:
1110: =item &make_persistent()
1111:
1112: Inputs: Hash of values to save, filename of persistent database.
1113:
1114: Store variables away to the %persistent_db.
1115: Values will be escaped. Values that are array pointers will have their
1116: elements escaped and concatenated in a comma separated string.
1117:
1118: =cut
1119:
1120: ######################################################################
1121: ######################################################################
1122: sub make_persistent {
1123: my %save = %{shift()};
1124: my $filename = shift;
1125: return undef if (! tie(%persistent_db,'GDBM_File',
1126: $filename,&GDBM_WRCREAT(),0640));
1127: foreach my $name (keys(%save)) {
1128: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1129: # We handle array references, but not recursively.
1130: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1131: $persistent_db{$name} = $store;
1132: }
1133: untie(%persistent_db);
1134: return 1;
1135: }
1136:
1137: ######################################################################
1138: ######################################################################
1139:
1140: =pod
1141:
1142: =item &make_form_data_persistent()
1143:
1144: Inputs: filename of persistent database.
1145:
1146: Store most form variables away to the %persistent_db.
1147: Values will be escaped. Values that are array pointers will have their
1148: elements escaped and concatenated in a comma separated string.
1149:
1150: =cut
1151:
1152: ######################################################################
1153: ######################################################################
1154: sub make_form_data_persistent {
1155: my $r = shift;
1156: my $filename = shift;
1157: my %save;
1158: foreach (keys(%ENV)) {
1159: next if (!/^form/ || /submit/);
1160: $save{$_} = $ENV{$_};
1161: }
1162: return &make_persistent(\%save,$filename);
1163: }
1164:
1165: ######################################################################
1166: ######################################################################
1167:
1168: =pod
1169:
1170: =item &parse_advanced_search()
1171:
1172: Parse advanced search form and return the following:
1173:
1174: =over 4
1175:
1176: =item $query Scalar containing an SQL query.
1177:
1178: =item $customquery Scalar containing a custom query.
1179:
1180: =item $customshow Scalar containing commands to show custom metadata.
1181:
1182: =item $libraries_to_query Reference to array of domains to search.
1183:
1184: =back
1185:
1186: =cut
1187:
1188: ######################################################################
1189: ######################################################################
1190: sub parse_advanced_search {
1191: my ($r,$closebutton,$hidden_fields)=@_;
1192: my @BasicFields = ('title','author','subject','keywords','url','version',
1193: 'notes','abstract','extension','owner','authorspace',
1194: # 'custommetadata','customshow',
1195: 'modifyinguser','standards','mime');
1196: my @StatsFields = &statfields();
1197: my @EvalFields = &evalfields();
1198: my $fillflag=0;
1199: my $pretty_search_string = "<br />\n";
1200: # Clean up fields for safety
1201: for my $field (@BasicFields,
1202: 'creationdatestart_month','creationdatestart_day',
1203: 'creationdatestart_year','creationdateend_month',
1204: 'creationdateend_day','creationdateend_year',
1205: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1206: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1207: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1208: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1209: $ENV{'form.'.$field}=~s/(not\s*$|^\s*(and|or)|)//gi;
1210: }
1211: foreach ('mode','form','element') {
1212: # is this required? Hmmm.
1213: next if (! exists($ENV{'form.'.$_}));
1214: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1215: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1216: }
1217: # Preprocess the category form element.
1218: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1219: ref($ENV{'form.category'}));
1220: #
1221: # Check to see if enough information was filled in
1222: foreach my $field (@BasicFields) {
1223: if (&filled($ENV{'form.'.$field})) {
1224: $fillflag++;
1225: }
1226: }
1227: foreach my $field (@StatsFields,@EvalFields) {
1228: if (&filled($ENV{'form.'.$field.'_max'})) {
1229: $fillflag++;
1230: }
1231: if (&filled($ENV{'form.'.$field.'_min'})) {
1232: $fillflag++;
1233: }
1234: }
1235:
1236: for my $field ('lowestgradelevel','highestgradelevel') {
1237: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1238: $ENV{'form.'.$field} > 0) {
1239: $fillflag++;
1240: }
1241: }
1242: if (! $fillflag) {
1243: &output_blank_field_error($r,$closebutton,
1244: 'phase=disp_adv',$hidden_fields);
1245: return ;
1246: }
1247: # Turn the form input into a SQL-based query
1248: my $query='';
1249: my @queries;
1250: my $font = '<font color="#800000" face="helvetica">';
1251: # Evaluate logical expression AND/OR/NOT phrase fields.
1252: foreach my $field (@BasicFields) {
1253: next if (!defined($ENV{'form.'.$field}) || $ENV{'form.'.$field} eq '');
1254: foreach my $searchphrase(&process_phrase_input($ENV{'form.'.$field})){
1255: $pretty_search_string .= $font."$field</font> contains <b>".
1256: $searchphrase."</b>";
1257: if ($ENV{'form.'.$field.'_related'}) {
1258: my @New_Words;
1259: ($searchphrase,@New_Words) = &related_version($searchphrase);
1260: if (@New_Words) {
1261: $pretty_search_string .= " with related words: ".
1262: "<b>@New_Words</b>.";
1263: } else {
1264: $pretty_search_string .= " with no related words.";
1265: }
1266: }
1267: $pretty_search_string .= "<br />\n";
1268: push @queries,&build_SQL_query($field,$searchphrase);
1269: }
1270: }
1271: #
1272: # Make the 'mime' from 'form.category' and 'form.extension'
1273: #
1274: my $searchphrase;
1275: if (exists($ENV{'form.category'}) &&
1276: $ENV{'form.category'} !~ /^\s*$/ &&
1277: $ENV{'form.category'} ne 'any') {
1278: my @extensions = &Apache::loncommon::filecategorytypes
1279: ($ENV{'form.category'});
1280: if (scalar(@extensions) > 0) {
1281: $searchphrase = join(' OR ',@extensions);
1282: }
1283: }
1284: if (defined($searchphrase)) {
1285: push @queries,&build_SQL_query('mime',$searchphrase);
1286: $pretty_search_string .=$font.'mime</font> contains <b>'.
1287: $searchphrase.'</b><br />';
1288: }
1289: #
1290: # Evaluate option lists
1291: if ($ENV{'form.lowestgradelevel'} &&
1292: $ENV{'form.lowestgradelevel'} ne '0' &&
1293: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1294: push(@queries,
1295: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1296: $pretty_search_string.="lowestgradelevel>=".
1297: $ENV{'form.lowestgradelevel'}."<br />\n";
1298: }
1299: if ($ENV{'form.highestgradelevel'} &&
1300: $ENV{'form.highestgradelevel'} ne '0' &&
1301: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1302: push(@queries,
1303: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1304: $pretty_search_string.="highestgradelevel<=".
1305: $ENV{'form.highestgradelevel'}."<br />\n";
1306: }
1307: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1308: push @queries,"(language like \"$ENV{'form.language'}\")";
1309: $pretty_search_string.=$font."language</font>= ".
1310: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1311: "<br />\n";
1312: }
1313: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1314: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1315: $pretty_search_string.=$font."copyright</font> = ".
1316: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1317: "<br \>\n";
1318: }
1319: #
1320: # Statistics
1321: foreach my $field (@StatsFields,@EvalFields) {
1322: my ($min,$max);
1323: if (exists($ENV{'form.'.$field.'_min'}) &&
1324: $ENV{'form.'.$field.'_min'} ne '') {
1325: $min = $ENV{'form.'.$field.'_min'};
1326: }
1327: if (exists($ENV{'form.'.$field.'_max'}) &&
1328: $ENV{'form.'.$field.'_max'} ne '') {
1329: $max = $ENV{'form.'.$field.'_max'};
1330: }
1331: next if (! defined($max) && ! defined($min));
1332: if (defined($min) && defined($max)) {
1333: ($min,$max) = sort {$a <=>$b} ($min,$max);
1334: }
1335: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1336: push(@queries,'('.$field.'>'.$min.')');
1337: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1338: }
1339: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1340: push(@queries,'('.$field.'<'.$max.')');
1341: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1342: }
1343: }
1344: #
1345: # Evaluate date windows
1346: my $cafter =
1347: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1348: my $cbefore =
1349: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1350: if ($cafter > $cbefore) {
1351: my $tmp = $cafter;
1352: $cafter = $cbefore;
1353: $cbefore = $tmp;
1354: }
1355: my $mafter =
1356: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1357: my $mbefore =
1358: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1359: if ($mafter > $mbefore) {
1360: my $tmp = $mafter;
1361: $mafter = $mbefore;
1362: $mbefore = $tmp;
1363: }
1364: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1365: $mafter,$mbefore);
1366: if (defined($error)) {
1367: &output_date_error($r,$error,$closebutton,$hidden_fields);
1368: } elsif (defined($datequery)) {
1369: # Here is where you would set up pretty_search_string to output
1370: # date query information.
1371: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1372: push @queries,$datequery;
1373: }
1374: #
1375: # Process form information for custom metadata querying
1376: my $customquery=undef;
1377: ##
1378: ## The custom metadata search was removed q long time ago mostly
1379: ## because I was unable to figureout exactly how it worked and could
1380: ## not imagine people actually using it. MH
1381: ##
1382: # if ($ENV{'form.custommetadata'}) {
1383: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1384: # $ENV{'form.custommetadata'}."</b><br />\n";
1385: # $customquery=&build_custommetadata_query('custommetadata',
1386: # $ENV{'form.custommetadata'});
1387: # }
1388: my $customshow=undef;
1389: # if ($ENV{'form.customshow'}) {
1390: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1391: # $ENV{'form.customshow'}."</b><br />\n";
1392: # $customshow=$ENV{'form.customshow'};
1393: # $customshow=~s/[^\w\s]//g;
1394: # my @fields=split(/\s+/,$customshow);
1395: # $customshow=join(" ",@fields);
1396: # }
1397: ##
1398: ## Deal with restrictions to given domains
1399: ##
1400: my ($libraries_to_query,$pretty_domains_string) =
1401: &parse_domain_restrictions();
1402: $pretty_search_string .= $pretty_domains_string."<br />\n";
1403: #
1404: if (@queries) {
1405: $query="SELECT * FROM metadata WHERE ".join(" AND ",@queries);
1406: } elsif ($customquery) {
1407: $query = '';
1408: }
1409: # &Apache::lonnet::logthis('query = '.$/.$query);
1410: return ($query,$customquery,$customshow,$libraries_to_query,
1411: $pretty_search_string);
1412: }
1413:
1414: sub parse_domain_restrictions {
1415: my $libraries_to_query = undef;
1416: # $ENV{'form.domains'} can be either a scalar or an array reference.
1417: # We need an array.
1418: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1419: return (undef,'');
1420: }
1421: my @allowed_domains;
1422: if (ref($ENV{'form.domains'})) {
1423: @allowed_domains = @{$ENV{'form.domains'}};
1424: } else {
1425: @allowed_domains = ($ENV{'form.domains'});
1426: }
1427: #
1428: my %domain_hash = ();
1429: my $pretty_domains_string;
1430: foreach (@allowed_domains) {
1431: $domain_hash{$_}++;
1432: }
1433: if ($domain_hash{'any'}) {
1434: $pretty_domains_string = "In all LON-CAPA domains.";
1435: } else {
1436: if (@allowed_domains > 1) {
1437: $pretty_domains_string = "In LON-CAPA domains:";
1438: } else {
1439: $pretty_domains_string = "In LON-CAPA domain ";
1440: }
1441: foreach (sort @allowed_domains) {
1442: $pretty_domains_string .= "<b>".$_."</b> ";
1443: }
1444: foreach (keys(%Apache::lonnet::libserv)) {
1445: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1446: push @$libraries_to_query,$_;
1447: }
1448: }
1449: }
1450: return ($libraries_to_query,$pretty_domains_string);
1451: }
1452:
1453: ######################################################################
1454: ######################################################################
1455:
1456: =pod
1457:
1458: =item &parse_basic_search()
1459:
1460: Parse the basic search form and return a scalar containing an sql query.
1461:
1462: =cut
1463:
1464: ######################################################################
1465: ######################################################################
1466: sub parse_basic_search {
1467: my ($r,$closebutton)=@_;
1468: #
1469: # Clean up fields for safety
1470: for my $field ('basicexp') {
1471: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1472: }
1473: foreach ('mode','form','element') {
1474: # is this required? Hmmm.
1475: next unless (exists($ENV{"form.$_"}));
1476: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1477: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1478: }
1479: my ($libraries_to_query,$pretty_domains_string) =
1480: &parse_domain_restrictions();
1481: #
1482: # Check to see if enough of a query is filled in
1483: my $search_string = $ENV{'form.basicexp'};
1484: $search_string =~ s/(not\s*$|^\s*(and|or)|)//gi;
1485: if (! &filled($search_string)) {
1486: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1487: return OK;
1488: }
1489: my $pretty_search_string='';
1490: my @Queries;
1491: my $concatarg=join(',',
1492: ('title', 'author', 'subject', 'notes', 'abstract',
1493: 'keywords'));
1494: foreach my $search (&process_phrase_input($search_string)){
1495: if ($ENV{'form.related'}) {
1496: $pretty_search_string .= ' and <br />' if ($pretty_search_string ne '');
1497: $pretty_search_string .= '<b>'.$search.'</b>';
1498: my @New_Words;
1499: ($search,@New_Words) = &related_version($search);
1500: next if (! $search);
1501: if (@New_Words) {
1502: $pretty_search_string .=
1503: " with related words: <b>@New_Words</b>";
1504: }
1505: } else {
1506: $pretty_search_string .= ' and ' if ($pretty_search_string ne '');
1507: $pretty_search_string .= '<b>'.$search.'</b>';
1508: }
1509: #
1510: # Build SQL query string based on form page
1511: push(@Queries,
1512: &build_SQL_query('concat_ws(" ",'.$concatarg.')',$search));
1513: }
1514: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1515: #
1516: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1517: $pretty_search_string .= ' '.$pretty_domains_string;
1518: }
1519: $pretty_search_string .= "<br />\n";
1520: $pretty_search_string =~ s:^<br /> and ::;
1521: # &Apache::lonnet::logthis($final_query);
1522: return ($final_query,$pretty_search_string,
1523: $libraries_to_query);
1524: }
1525:
1526: sub process_phrase_input {
1527: my ($phrase)=@_;
1528: my @Phrases;
1529: # &Apache::lonnet::logthis('phrase = :'.$phrase.':');
1530: my $in_quotes = 0;
1531: my @Words = split(/\s+/,$phrase);
1532: foreach my $word (@Words) {
1533: $word =~ s/(\w+)\"(\w+)/$1$2/g;
1534: if ($in_quotes) {
1535: if ($word =~ s/(\")$//) {
1536: $in_quotes = 0;
1537: }
1538: if ($Phrases[-1] ne '') {
1539: $Phrases[-1] .= ' ';
1540: }
1541: $Phrases[-1] .= $word;
1542: } else {
1543: if ($word =~ s/^(\")//) {
1544: $in_quotes=1;
1545: }
1546: push(@Phrases,$word);
1547: }
1548: }
1549: #
1550: #foreach my $p (@Phrases) {
1551: # &Apache::lonnet::logthis(' subphrase = '.$p);
1552: #}
1553: #
1554: return @Phrases;
1555: }
1556:
1557: ######################################################################
1558: ######################################################################
1559:
1560: =pod
1561:
1562: =item &related_version()
1563:
1564: Modifies an input string to include related words. Words in the string
1565: are replaced with parenthesized lists of 'OR'd words. For example
1566: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1567:
1568: Note: Using this twice on a string is probably silly.
1569:
1570: =cut
1571:
1572: ######################################################################
1573: ######################################################################
1574: sub related_version {
1575: my ($word) = @_;
1576: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1577: my @Words = &Apache::loncommon::get_related_words($word);
1578: # Only use 4 related words
1579: @Words = ($#Words>4? @Words[0..4] : @Words);
1580: my $result = join " OR ", ($word,@Words);
1581: return $result,sort(@Words);
1582: }
1583:
1584: ######################################################################
1585: ######################################################################
1586:
1587: =pod
1588:
1589: =item &build_SQL_query()
1590:
1591: Builds a SQL query string from a logical expression with AND/OR keywords
1592: using Text::Query and &recursive_SQL_query_builder()
1593:
1594: =cut
1595:
1596: ######################################################################
1597: ######################################################################
1598: sub build_SQL_query {
1599: my ($field_name,$logic_statement)=@_;
1600: my $q=new Text::Query('abc',
1601: -parse => 'Text::Query::ParseAdvanced',
1602: -build => 'Text::Query::Build');
1603: $q->prepare($logic_statement);
1604: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1605: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1606: return $sql_query;
1607: }
1608:
1609: ######################################################################
1610: ######################################################################
1611:
1612: =pod
1613:
1614: =item &build_custommetadata_query()
1615:
1616: Constructs a custom metadata query using a rather heinous regular
1617: expression.
1618:
1619: =cut
1620:
1621: ######################################################################
1622: ######################################################################
1623: sub build_custommetadata_query {
1624: my ($field_name,$logic_statement)=@_;
1625: my $q=new Text::Query('abc',
1626: -parse => 'Text::Query::ParseAdvanced',
1627: -build => 'Text::Query::BuildAdvancedString');
1628: $q->prepare($logic_statement);
1629: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1630: # quick fix to change literal into xml tag-matching
1631: # will eventually have to write a separate builder module
1632: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1633: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1634: /\\<$1\\>?# \<wordone\>
1635: \[\^\\<\]?# [^\<]
1636: \*$2\[\^\\<\]?# *wordtwo[^\<]
1637: \*\\<\\\/$1\\>?# *\<\/wordone\>
1638: /g;
1639: return $matchexp;
1640: }
1641:
1642: ######################################################################
1643: ######################################################################
1644:
1645: =pod
1646:
1647: =item &recursive_SQL_query_build()
1648:
1649: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1650:
1651: =cut
1652:
1653: ######################################################################
1654: ######################################################################
1655: sub recursive_SQL_query_build {
1656: my ($dkey,$pattern)=@_;
1657: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1658: return $pattern unless @matches;
1659: foreach my $match (@matches) {
1660: $match=~/\[ (\w+)\s(.*) \]/;
1661: my ($key,$value)=($1,$2);
1662: my $replacement='';
1663: if ($key eq 'literal') {
1664: $replacement="($dkey LIKE \"\%$value\%\")";
1665: } elsif (lc($key) eq 'not') {
1666: $value=~s/LIKE/NOT LIKE/;
1667: # $replacement="($dkey not like $value)";
1668: $replacement="$value";
1669: } elsif ($key eq 'and') {
1670: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1671: $replacement="($1 AND $2)";
1672: } elsif ($key eq 'or') {
1673: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1674: $replacement="($1 OR $2)";
1675: }
1676: substr($pattern,
1677: index($pattern,$match),
1678: length($match),
1679: $replacement);
1680: }
1681: &recursive_SQL_query_build($dkey,$pattern);
1682: }
1683:
1684: ######################################################################
1685: ######################################################################
1686:
1687: =pod
1688:
1689: =item &build_date_queries()
1690:
1691: Builds a SQL logic query to check time/date entries.
1692: Also reports errors (check for /^Incorrect/).
1693:
1694: =cut
1695:
1696: ######################################################################
1697: ######################################################################
1698: sub build_date_queries {
1699: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1700: my ($result,$error,$pretty_string);
1701: #
1702: # Verify the input
1703: if (! defined($cafter) && ! defined($cbefore) &&
1704: ! defined($mafter) && ! defined($mbefore)) {
1705: # This is an okay situation, so return undef for the error
1706: return (undef,undef,undef);
1707: }
1708: if ((defined($cafter) && ! defined($cbefore)) ||
1709: (defined($cbefore) && ! defined($cafter))) {
1710: # This is bad, so let them know
1711: $error = &mt('Incorrect entry for the creation date. '.
1712: 'You must specify both the beginning and ending dates.');
1713: }
1714: if (! defined($error) &&
1715: ((defined($mafter) && ! defined($mbefore)) ||
1716: (defined($mbefore) && ! defined($mafter)))) {
1717: # This is also bad, so let them know
1718: $error = &mt('Incorrect entry for the last revision date. '.
1719: 'You must specify both the beginning and ending dates.');
1720: }
1721: if (! defined($error)) {
1722: #
1723: # Build the queries
1724: my @queries;
1725: if (defined($cbefore) && defined($cafter)) {
1726: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1727: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1728: # Correct for year being relative to 1900
1729: $cayear+=1900; $cbyear+=1900;
1730: my $cquery=
1731: '(creationdate BETWEEN '.
1732: "'".$cayear.'-'.$camon.'-'.$caday."'".
1733: ' AND '.
1734: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1735: $pretty_string .= '<br />' if (defined($pretty_string));
1736: $pretty_string .=
1737: &mt('created between [_1] and [_2]',
1738: &Apache::lonlocal::locallocaltime($cafter),
1739: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1740: push(@queries,$cquery);
1741: $pretty_string =~ s/ 00:00:00//g;
1742: }
1743: if (defined($mbefore) && defined($mafter)) {
1744: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1745: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1746: # Correct for year being relative to 1900
1747: $mayear+=1900; $mbyear+=1900;
1748: my $mquery=
1749: '(lastrevisiondate BETWEEN '.
1750: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1751: ' AND '.
1752: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1753: push(@queries,$mquery);
1754: $pretty_string .= '<br />' if (defined($pretty_string));
1755: $pretty_string .=
1756: &mt('last revised between [_1] and [_2]',
1757: &Apache::lonlocal::locallocaltime($mafter),
1758: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1759: $pretty_string =~ s/ 00:00:00//g;
1760: }
1761: if (@queries) {
1762: $result .= join(" AND ",@queries);
1763: }
1764: }
1765: return ($result,$error,$pretty_string);
1766: }
1767:
1768: ######################################################################
1769: ######################################################################
1770:
1771: =pod
1772:
1773: =item ©right_check()
1774:
1775: Inputs: $Metadata, a hash pointer of metadata for a resource.
1776:
1777: Returns: 1 if the resource is available to the user making the query,
1778: 0 otherwise.
1779:
1780: =cut
1781:
1782: ######################################################################
1783: ######################################################################
1784: sub copyright_check {
1785: my $Metadata = shift;
1786: # Check copyright tags and skip results the user cannot use
1787: my (undef,undef,$resdom,$resname) = split('/',
1788: $Metadata->{'url'});
1789: # Check for priv
1790: if (($Metadata->{'copyright'} eq 'priv') &&
1791: (($ENV{'user.name'} ne $resname) &&
1792: ($ENV{'user.domain'} ne $resdom))) {
1793: return 0;
1794: }
1795: # Check for domain
1796: if (($Metadata->{'copyright'} eq 'domain') &&
1797: ($ENV{'user.domain'} ne $resdom)) {
1798: return 0;
1799: }
1800: return 1;
1801: }
1802:
1803: ######################################################################
1804: ######################################################################
1805:
1806: =pod
1807:
1808: =item &ensure_db_and_table()
1809:
1810: Ensure we can get lonmysql to connect to the database and the table we
1811: need exists.
1812:
1813: Inputs: $r, table id
1814:
1815: Returns: undef on error, 1 if the table exists.
1816:
1817: =cut
1818:
1819: ######################################################################
1820: ######################################################################
1821: sub ensure_db_and_table {
1822: my ($r,$table) = @_;
1823: ##
1824: ## Sanity check the table id.
1825: ##
1826: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1827: $r->print("Unable to retrieve search results. ".
1828: "Unable to determine the table results were stored in. ".
1829: "</body></html>");
1830: return undef;
1831: }
1832: ##
1833: ## Make sure we can connect and the table exists.
1834: ##
1835: my $connection_result = &Apache::lonmysql::connect_to_db();
1836: if (!defined($connection_result)) {
1837: $r->print("Unable to connect to the MySQL database where your results".
1838: " are stored. </body></html>");
1839: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1840: " connect to database.");
1841: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1842: return undef;
1843: }
1844: my $table_check = &Apache::lonmysql::check_table($table);
1845: if (! defined($table_check)) {
1846: $r->print("A MySQL error has occurred.</form></body></html>");
1847: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1848: " of table ".$table);
1849: return undef;
1850: } elsif (! $table_check) {
1851: $r->print("The table of results could not be found.");
1852: &Apache::lonnet::logthis("The user requested a table, ".$table.
1853: ", that could not be found.");
1854: return undef;
1855: }
1856: return 1;
1857: }
1858:
1859: ######################################################################
1860: ######################################################################
1861:
1862: =pod
1863:
1864: =item &print_sort_form()
1865:
1866: The sort feature is not implemented at this time. This form just prints
1867: a link to change the search query.
1868:
1869: =cut
1870:
1871: ######################################################################
1872: ######################################################################
1873: sub print_sort_form {
1874: my ($r,$pretty_query_string) = @_;
1875: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1).
1876: &Apache::lonhtmlcommon::breadcrumbs
1877: (undef,'Searching','Searching',undef,undef,
1878: $ENV{'form.catalogmode'} ne 'groupsearch');
1879:
1880: ##
1881: my %SortableFields=&Apache::lonlocal::texthash(
1882: id => 'Default',
1883: title => 'Title',
1884: author => 'Author',
1885: subject => 'Subject',
1886: url => 'URL',
1887: version => 'Version Number',
1888: mime => 'Mime type',
1889: lang => 'Language',
1890: owner => 'Owner/Publisher',
1891: copyright => 'Copyright',
1892: hostname => 'Host',
1893: creationdate => 'Creation Date',
1894: lastrevisiondate => 'Revision Date'
1895: );
1896: ##
1897: my $table = $ENV{'form.table'};
1898: return if (! &ensure_db_and_table($r,$table));
1899: ##
1900: ## Get the number of results
1901: ##
1902: my $total_results = &Apache::lonmysql::number_of_rows($table);
1903: if (! defined($total_results)) {
1904: $r->print("A MySQL error has occurred.</form></body></html>");
1905: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1906: " of rows in table ".$table);
1907: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1908: return;
1909: }
1910: my $result;
1911: $result.=<<END;
1912: <html>
1913: <head>
1914: <script>
1915: function change_sort() {
1916: var newloc = "/adm/searchcat?phase=results";
1917: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1918: newloc += "&sortby=";
1919: newloc += document.forms.statusform.elements.sortby.value;
1920: parent.resultsframe.location= newloc;
1921: }
1922: </script>
1923: <title>Results</title>
1924: </head>
1925: $bodytag
1926: <form name="statusform" action="" method="post">
1927: <input type="hidden" name="Queue" value="" />
1928: END
1929:
1930: #<h2>Sort Results</h2>
1931: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1932: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1933: # foreach (keys(%SortableFields)) {
1934: # $result.="<option name=\"$_\"";
1935: # if ($_ eq $ENV{'form.sortby'}) {
1936: # $result.=" selected ";
1937: # }
1938: # $result.=" >$SortableFields{$_}</option>\n";
1939: # }
1940: # $result.="</select>\n";
1941: my $revise = &revise_button();
1942: $result.=<<END;
1943: <p>
1944: There are $total_results matches to your query. $revise
1945: </p><p>
1946: Search:$pretty_query_string
1947: </p>
1948: </form>
1949: </body>
1950: </html>
1951: END
1952: $r->print($result);
1953: return;
1954: }
1955:
1956: #####################################################################
1957: #####################################################################
1958:
1959: =pod
1960:
1961: =item MySQL Table Description
1962:
1963: MySQL table creation requires a precise description of the data to be
1964: stored. The use of the correct types to hold data is vital to efficient
1965: storage and quick retrieval of records. The columns must be described in
1966: the following format:
1967:
1968: =cut
1969:
1970: #####################################################################
1971: #####################################################################
1972: #
1973: # These should probably be scoped but I don't have time right now...
1974: #
1975: my @Datatypes;
1976: my @Fullindicies;
1977:
1978: ######################################################################
1979: ######################################################################
1980:
1981: =pod
1982:
1983: =item &create_results_table()
1984:
1985: Creates the table of search results by calling lonmysql. Stores the
1986: table id in $ENV{'form.table'}
1987:
1988: Inputs: none.
1989:
1990: Returns: the identifier of the table on success, undef on error.
1991:
1992: =cut
1993:
1994: ######################################################################
1995: ######################################################################
1996: sub set_up_table_structure {
1997: my ($datatypes,$fullindicies) =
1998: &LONCAPA::lonmetadata::describe_metadata_storage();
1999: # Copy the table description before modifying it...
2000: @Datatypes = @{$datatypes};
2001: unshift(@Datatypes,{name => 'id',
2002: type => 'MEDIUMINT',
2003: restrictions => 'UNSIGNED NOT NULL',
2004: primary_key => 'yes',
2005: auto_inc => 'yes' });
2006: @Fullindicies = @{$fullindicies};
2007: return;
2008: }
2009:
2010: sub create_results_table {
2011: &set_up_table_structure();
2012: my $table = &Apache::lonmysql::create_table
2013: ( { columns => \@Datatypes,
2014: FULLTEXT => [{'columns' => \@Fullindicies},],
2015: } );
2016: if (defined($table)) {
2017: $ENV{'form.table'} = $table;
2018: return $table;
2019: }
2020: return undef; # Error...
2021: }
2022:
2023: ######################################################################
2024: ######################################################################
2025:
2026: =pod
2027:
2028: =item Search Status update functions
2029:
2030: Each of the following functions changes the values of one of the
2031: input fields used to display the search status to the user. The names
2032: should be explanatory.
2033:
2034: Inputs: Apache request handler ($r), text to display.
2035:
2036: Returns: Nothing.
2037:
2038: =over 4
2039:
2040: =item &update_count_status()
2041:
2042: =item &update_status()
2043:
2044: =item &update_seconds()
2045:
2046: =back
2047:
2048: =cut
2049:
2050: ######################################################################
2051: ######################################################################
2052: sub update_count_status {
2053: my ($r,$text) = @_;
2054: $text =~ s/\'/\\\'/g;
2055: $r->print
2056: ("<script>document.statusform.count.value = ' $text'</script>\n");
2057: $r->rflush();
2058: }
2059:
2060: sub update_status {
2061: my ($r,$text) = @_;
2062: $text =~ s/\'/\\\'/g;
2063: $r->print
2064: ("<script>document.statusform.status.value = ' $text'</script>\n");
2065: $r->rflush();
2066: }
2067:
2068: {
2069: my $max_time = 40; # seconds for the search to complete
2070: my $start_time = 0;
2071: my $last_time = 0;
2072:
2073: sub reset_timing {
2074: $start_time = 0;
2075: $last_time = 0;
2076: }
2077:
2078: sub time_left {
2079: if ($start_time == 0) {
2080: $start_time = time;
2081: }
2082: my $time_left = $max_time - (time - $start_time);
2083: $time_left = 0 if ($time_left < 0);
2084: return $time_left;
2085: }
2086:
2087: sub update_seconds {
2088: my ($r) = @_;
2089: my $time = &time_left();
2090: if (($last_time-$time) > 0) {
2091: $r->print("<script>".
2092: "document.statusform.seconds.value = '$time'".
2093: "</script>\n");
2094: $r->rflush();
2095: }
2096: $last_time = $time;
2097: }
2098:
2099: }
2100:
2101: ######################################################################
2102: ######################################################################
2103:
2104: =pod
2105:
2106: =item &revise_button()
2107:
2108: Inputs: None
2109:
2110: Returns: html string for a 'revise search' button.
2111:
2112: =cut
2113:
2114: ######################################################################
2115: ######################################################################
2116: sub revise_button {
2117: my $revise_phase = 'disp_basic';
2118: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2119: my $newloc = '/adm/searchcat'.
2120: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2121: '&cleargroupsort=1'.
2122: '&phase='.$revise_phase;
2123: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2124: qq{ onClick="parent.location='$newloc';" /> };
2125: return $result;
2126: }
2127:
2128: ######################################################################
2129: ######################################################################
2130:
2131: =pod
2132:
2133: =item &run_search()
2134:
2135: Executes a search query by sending it the the other servers and putting the
2136: results into MySQL.
2137:
2138: =cut
2139:
2140: ######################################################################
2141: ######################################################################
2142: sub run_search {
2143: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2144: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2145: $bodytag.=&Apache::lonhtmlcommon::breadcrumbs
2146: (undef,'Searching','Searching',undef,undef,
2147: $ENV{'form.catalogmode'} ne 'groupsearch');
2148: my $connection = $r->connection;
2149: #
2150: # Print run_search header
2151: #
2152: $r->print(<<END);
2153: <html>
2154: <head><title>Search Status</title></head>
2155: $bodytag
2156: <form name="statusform" action="" method="post">
2157: <input type="hidden" name="Queue" value="" />
2158: END
2159: # Check to see if $pretty_string has more than one carriage return.
2160: # Assume \n s are following <br /> s and truncate the value.
2161: # (there is probably a better way)...
2162: my @Lines = split /<br \/>/,$pretty_string;
2163: if (@Lines > 2) {
2164: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
2165: }
2166: $r->print(&mt("Search: [_1]",$pretty_string));
2167: $r->rflush();
2168: #
2169: # Determine the servers we need to contact.
2170: my @Servers_to_contact;
2171: if (defined($serverlist)) {
2172: if (ref($serverlist) eq 'ARRAY') {
2173: @Servers_to_contact = @$serverlist;
2174: } else {
2175: @Servers_to_contact = ($serverlist);
2176: }
2177: } else {
2178: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2179: }
2180: my %Server_status;
2181: #
2182: # Check on the mysql table we will use to store results.
2183: my $table =$ENV{'form.table'};
2184: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2185: $r->print("Unable to determine table id to store search results in.".
2186: "The search has been aborted.</body></html>");
2187: return;
2188: }
2189: my $table_status = &Apache::lonmysql::check_table($table);
2190: if (! defined($table_status)) {
2191: $r->print("Unable to determine status of table.</body></html>");
2192: &Apache::lonnet::logthis("Bogus table id of $table for ".
2193: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2194: &Apache::lonnet::logthis("lonmysql error = ".
2195: &Apache::lonmysql::get_error());
2196: return;
2197: }
2198: if (! $table_status) {
2199: &Apache::lonnet::logthis("lonmysql error = ".
2200: &Apache::lonmysql::get_error());
2201: &Apache::lonnet::logthis("lonmysql debug = ".
2202: &Apache::lonmysql::get_debug());
2203: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2204: $r->print("The table id,$table, we tried to use is invalid.".
2205: "The search has been aborted.</body></html>");
2206: return;
2207: }
2208: ##
2209: ## Prepare for the big loop.
2210: my $hitcountsum;
2211: my $server;
2212: my $status;
2213: my $revise = &revise_button();
2214: $r->print(<<END);
2215: <table>
2216: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2217: <tr>
2218: <td><input type="text" name="status" value="" size="30" /></td>
2219: <td><input type="text" name="count" value="" size="10" /></td>
2220: <td><input type="text" name="seconds" value="" size="8" /></td>
2221: <td>$revise</td>
2222: </tr>
2223: </table>
2224: </form>
2225: END
2226: $r->rflush();
2227: &reset_timing();
2228: &update_seconds($r);
2229: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2230: while (&time_left() &&
2231: ((@Servers_to_contact) || keys(%Server_status))) {
2232: &update_seconds($r);
2233: #
2234: # Send out a search request
2235: if (@Servers_to_contact) {
2236: # Contact one server
2237: my $server = shift(@Servers_to_contact);
2238: &update_status($r,&mt('contacting [_1]',$server));
2239: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2240: $customshow,[$server]);
2241: ($server) = keys(%$reply);
2242: $Server_status{$server} = $reply->{$server};
2243: } else {
2244: # wait a sec. to give time for files to be written
2245: # This sleep statement is here instead of outside the else
2246: # block because we do not want to pause if we have servers
2247: # left to contact.
2248: if (scalar (keys(%Server_status))) {
2249: &update_status($r,
2250: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2251: }
2252: sleep(1);
2253: }
2254: #
2255: # Loop through the servers we have contacted but do not
2256: # have results from yet, looking for results.
2257: while (my ($server,$status) = each(%Server_status)) {
2258: last if ($connection->aborted());
2259: &update_seconds($r);
2260: if ($status eq 'con_lost') {
2261: delete ($Server_status{$server});
2262: next;
2263: }
2264: $status=~/^([\.\w]+)$/;
2265: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2266: if (-e $datafile && ! -e "$datafile.end") {
2267: &update_status($r,&mt('Receiving results from [_1]',$server));
2268: next;
2269: }
2270: last if ($connection->aborted());
2271: if (-e "$datafile.end") {
2272: &update_status($r,&mt('Reading results from [_1]',$server));
2273: if (-z "$datafile") {
2274: delete($Server_status{$server});
2275: next;
2276: }
2277: my $fh;
2278: if (!($fh=Apache::File->new($datafile))) {
2279: $r->print("Unable to open search results file for ".
2280: "server $server. Omitting from search");
2281: delete($Server_status{$server});
2282: next;
2283: }
2284: # Read in the whole file.
2285: while (my $result = <$fh>) {
2286: last if ($connection->aborted());
2287: #
2288: # Records are stored one per line
2289: chomp($result);
2290: next if (! $result);
2291: #
2292: # Parse the result.
2293: my %Fields = &parse_raw_result($result,$server);
2294: $Fields{'hostname'} = $server;
2295: #
2296: # Skip based on copyright
2297: next if (! ©right_check(\%Fields));
2298: #
2299: # Store the result in the mysql database
2300: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2301: if (! defined($result)) {
2302: $r->print(&Apache::lonmysql::get_error());
2303: }
2304: #
2305: $hitcountsum ++;
2306: &update_seconds($r);
2307: if ($hitcountsum % 50 == 0) {
2308: &update_count_status($r,$hitcountsum);
2309: }
2310: }
2311: $fh->close();
2312: # $server is only deleted if the results file has been
2313: # found and (successfully) opened. This may be a bad idea.
2314: delete($Server_status{$server});
2315: }
2316: last if ($connection->aborted());
2317: &update_count_status($r,$hitcountsum);
2318: }
2319: last if ($connection->aborted());
2320: &update_seconds($r);
2321: }
2322: &update_status($r,&mt('Search Complete [_1]',$server));
2323: &update_seconds($r);
2324: #
2325: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2326: #
2327: # We have run out of time or run out of servers to talk to and
2328: # results to get, so let the client know the top frame needs to be
2329: # loaded from /adm/searchcat
2330: $r->print("</body></html>");
2331: # if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2332: $r->print("<script>".
2333: "window.location='/adm/searchcat?".
2334: "phase=sort&".
2335: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2336: "</script>");
2337: # }
2338: return;
2339: }
2340:
2341: ######################################################################
2342: ######################################################################
2343:
2344: =pod
2345:
2346: =item &prev_next_buttons()
2347:
2348: Returns html for the previous and next buttons on the search results page.
2349:
2350: =cut
2351:
2352: ######################################################################
2353: ######################################################################
2354: sub prev_next_buttons {
2355: my ($current_min,$show,$total,$parms) = @_;
2356: return '' if ($show eq 'all'); # No links if you get them all at once.
2357: #
2358: # Create buttons
2359: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2360: $buttons .= '/>';
2361: $buttons .= ' 'x3;
2362: $buttons .= '<input type="submit" name="reload" '.
2363: 'value="'.&mt('Reload').'" />';
2364: $buttons .= ' 'x3;
2365: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2366: $buttons .= '/>';
2367: return $buttons;
2368: }
2369:
2370: ######################################################################
2371: ######################################################################
2372:
2373: =pod
2374:
2375: =item &display_results()
2376:
2377: Prints the results out for selection and perusal.
2378:
2379: =cut
2380:
2381: ######################################################################
2382: ######################################################################
2383: sub display_results {
2384: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2385: my $connection = $r->connection;
2386: $r->print(&search_results_header($importbutton,$closebutton));
2387: ##
2388: ## Set viewing function
2389: ##
2390: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2391: if (!defined($viewfunction)) {
2392: $r->print("Internal Error - Bad view selected.\n");
2393: $r->rflush();
2394: return;
2395: }
2396: ##
2397: ## $checkbox_num is a count of the number of checkboxes output on the
2398: ## page this is used only during catalogmode=groupsearch.
2399: my $checkbox_num = 0;
2400: ##
2401: ## Get the catalog controls setup
2402: ##
2403: my $action = "/adm/searchcat?phase=results";
2404: ##
2405: ## Deal with groupsearch by opening the groupsearch db file.
2406: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2407: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2408: &GDBM_WRCREAT(),0640)) {
2409: $r->print('Unable to store import results.</form></body></html>');
2410: $r->rflush();
2411: return;
2412: }
2413: }
2414: ##
2415: ## Prepare the table for querying
2416: my $table = $ENV{'form.table'};
2417: return if (! &ensure_db_and_table($r,$table));
2418: ##
2419: ## Get the number of results
2420: my $total_results = &Apache::lonmysql::number_of_rows($table);
2421: if (! defined($total_results)) {
2422: $r->print("A MySQL error has occurred.</form></body></html>");
2423: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2424: " of rows in table ".$table);
2425: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2426: return;
2427: }
2428: ##
2429: ## Determine how many results we need to get
2430: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2431: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
2432: if (exists($ENV{'form.prev'})) {
2433: $ENV{'form.start'} -= $ENV{'form.show'};
2434: } elsif (exists($ENV{'form.next'})) {
2435: $ENV{'form.start'} += $ENV{'form.show'};
2436: }
2437: $ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
2438: $ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
2439: my $min = $ENV{'form.start'};
2440: my $max;
2441: if ($ENV{'form.show'} eq 'all') {
2442: $max = $total_results ;
2443: } else {
2444: $max = $min + $ENV{'form.show'} - 1;
2445: $max = $total_results if ($max > $total_results);
2446: }
2447: ##
2448: ## Output form elements
2449: $r->print(&hidden_field('table').
2450: &hidden_field('phase').
2451: &hidden_field('persistent_db_id').
2452: &hidden_field('start')
2453: );
2454: ##
2455: ## Output links (if necessary) for 'prev' and 'next' pages.
2456: $r->print
2457: ('<table width="100%"><tr><td width="50%" align="right">'.
2458: &prev_next_buttons($min,$ENV{'form.show'},$total_results).
2459: '</td><td align="right">'.
2460: &viewoptions().'</td></tr></table>'
2461: );
2462: if ($total_results == 0) {
2463: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2464: '<h3>'.&mt('There are currently no results').'.</h3>'.
2465: "</form></body></html>");
2466: return;
2467: } else {
2468: $r->print
2469: ("<center>Results $min to $max out of $total_results</center>\n");
2470: }
2471: ##
2472: ## Get results from MySQL table
2473: my @Results = &Apache::lonmysql::get_rows($table,
2474: 'id>='.$min.' AND id<='.$max);
2475: ##
2476: ## Loop through the results and output them.
2477: foreach my $row (@Results) {
2478: if ($connection->aborted()) {
2479: &cleanup();
2480: return;
2481: }
2482: my %Fields = %{&parse_row(@$row)};
2483: my $output="<p>\n";
2484: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2485: $Fields{'title'} = 'Untitled';
2486: }
2487: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2488: $Fields{'id'},$checkbox_num++);
2489: # Render the result into html
2490: $output.= &$viewfunction($prefix,%Fields);
2491: # Print them out as they come in.
2492: $r->print($output);
2493: $r->rflush();
2494: }
2495: if (@Results < 1) {
2496: $r->print(&mt("There were no results matching your query"));
2497: } else {
2498: $r->print
2499: ('<center>'.
2500: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2501: "table=".$ENV{'form.table'}.
2502: "&phase=results".
2503: "&persistent_db_id=".
2504: $ENV{'form.persistent_db_id'})
2505: ."</center>\n"
2506: );
2507: }
2508: $r->print("</form></body></html>");
2509: $r->rflush();
2510: untie %groupsearch_db if (tied(%groupsearch_db));
2511: return;
2512: }
2513:
2514: ######################################################################
2515: ######################################################################
2516:
2517: =pod
2518:
2519: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2520:
2521: Returns html needed for the various catalog modes. Gets inputs from
2522: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2523:
2524: =cut
2525:
2526: ######################################################################
2527: ######################################################################
2528: sub catalogmode_output {
2529: my $output = '';
2530: my ($title,$url,$fnum,$checkbox_num) = @_;
2531: if ($ENV{'form.catalogmode'} eq 'interactive') {
2532: $title=~ s/\'/\\\'/g;
2533: if ($ENV{'form.catalogmode'} eq 'interactive') {
2534: $output.=<<END
2535: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2536: onClick="javascript:select_data('$title','$url')">
2537: </font>
2538: END
2539: }
2540: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2541: $groupsearch_db{"pre_${fnum}_link"}=$url;
2542: $groupsearch_db{"pre_${fnum}_title"}=$title;
2543: $output.=<<END;
2544: <font size='-1'>
2545: <input type="checkbox" name="returnvalues" value="SELECT"
2546: onClick="javascript:queue($checkbox_num,$fnum)" />
2547: </font>
2548: END
2549: }
2550: return $output;
2551: }
2552: ######################################################################
2553: ######################################################################
2554:
2555: =pod
2556:
2557: =item &parse_row()
2558:
2559: Parse a row returned from the database.
2560:
2561: =cut
2562:
2563: ######################################################################
2564: ######################################################################
2565: sub parse_row {
2566: my @Row = @_;
2567: my %Fields;
2568: if (! scalar(@Datatypes)) {
2569: &set_up_table_structure();
2570: }
2571: for (my $i=0;$i<=$#Row;$i++) {
2572: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2573: }
2574: $Fields{'language'} =
2575: &Apache::loncommon::languagedescription($Fields{'language'});
2576: $Fields{'copyrighttag'} =
2577: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2578: $Fields{'mimetag'} =
2579: &Apache::loncommon::filedescription($Fields{'mime'});
2580: return \%Fields;
2581: }
2582:
2583: ###########################################################
2584: ###########################################################
2585:
2586: =pod
2587:
2588: =item &parse_raw_result()
2589:
2590: Takes a line from the file of results and parse it. Returns a hash
2591: with keys according to column labels
2592:
2593: In addition, the following tags are set by calling the appropriate
2594: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2595:
2596: The 'title' field is set to "Untitled" if the title field is blank.
2597:
2598: 'abstract' and 'keywords' are truncated to 200 characters.
2599:
2600: =cut
2601:
2602: ###########################################################
2603: ###########################################################
2604: sub parse_raw_result {
2605: my ($result,$hostname) = @_;
2606: # conclude from self to others regarding fields
2607: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2608: (map {
2609: &Apache::lonnet::unescape($_);
2610: } (split(/\,/,$result)) );
2611: return %Fields;
2612: }
2613:
2614: ###########################################################
2615: ###########################################################
2616:
2617: =pod
2618:
2619: =item &handle_custom_fields()
2620:
2621: =cut
2622:
2623: ###########################################################
2624: ###########################################################
2625: sub handle_custom_fields {
2626: my @results = @{shift()};
2627: my $customshow='';
2628: my $extrashow='';
2629: my @customfields;
2630: if ($ENV{'form.customshow'}) {
2631: $customshow=$ENV{'form.customshow'};
2632: $customshow=~s/[^\w\s]//g;
2633: my @fields=map {
2634: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2635: } split(/\s+/,$customshow);
2636: @customfields=split(/\s+/,$customshow);
2637: if ($customshow) {
2638: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2639: }
2640: }
2641: my $customdata='';
2642: my %customhash;
2643: foreach my $result (@results) {
2644: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2645: my $tmp=$result;
2646: $tmp=~s/^custom\=//;
2647: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2648: } split(/\,/,$tmp);
2649: $customhash{$k}=$v;
2650: }
2651: }
2652: return ($extrashow,\@customfields,\%customhash);
2653: }
2654:
2655: ######################################################################
2656: ######################################################################
2657:
2658: =pod
2659:
2660: =item &search_results_header()
2661:
2662: Output the proper html headers and javascript code to deal with different
2663: calling modes.
2664:
2665: Takes most inputs directly from %ENV, except $mode.
2666:
2667: =over 4
2668:
2669: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2670:
2671: =back
2672:
2673: The following environment variables are checked:
2674:
2675: =over 4
2676:
2677: =item 'form.catalogmode'
2678:
2679: Checked for 'interactive' and 'groupsearch'.
2680:
2681: =item 'form.mode'
2682:
2683: Checked for existance & 'edit' mode.
2684:
2685: =item 'form.form'
2686:
2687: Contains the name of the form that has the input fields to set
2688:
2689: =item 'form.element'
2690:
2691: the name of the input field to put the URL into
2692:
2693: =item 'form.titleelement'
2694:
2695: the name of the input field to put the title into
2696:
2697: =back
2698:
2699: =cut
2700:
2701: ######################################################################
2702: ######################################################################
2703: sub search_results_header {
2704: my ($importbutton,$closebutton) = @_;
2705: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2706: my $result = '';
2707: # output beginning of search page
2708: # conditional output of script functions dependent on the mode in
2709: # which the search was invoked
2710: if ($ENV{'form.catalogmode'} eq 'interactive'){
2711: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2712: $result.=<<SCRIPT;
2713: <script type="text/javascript">
2714: function select_data(title,url) {
2715: changeTitle(title);
2716: changeURL(url);
2717: parent.close();
2718: }
2719: function changeTitle(val) {
2720: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2721: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2722: }
2723: }
2724: function changeURL(val) {
2725: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2726: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2727: }
2728: }
2729: </script>
2730: SCRIPT
2731: } elsif ($ENV{'form.mode'} eq 'edit') {
2732: my $form = $ENV{'form.form'};
2733: my $element = $ENV{'form.element'};
2734: my $titleelement = $ENV{'form.titleelement'};
2735: my $changetitle;
2736: if (!$titleelement) {
2737: $changetitle='function changeTitle(val) {}';
2738: } else {
2739: $changetitle=<<END;
2740: function changeTitle(val) {
2741: if (parent.targetwin.document) {
2742: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2743: } else {
2744: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2745: alert("Unable to transfer data to "+url);
2746: }
2747: }
2748: END
2749: }
2750:
2751: $result.=<<SCRIPT;
2752: <script type="text/javascript">
2753: function select_data(title,url) {
2754: changeURL(url);
2755: changeTitle(title);
2756: parent.close();
2757: }
2758: $changetitle
2759: function changeURL(val) {
2760: if (parent.targetwin.document) {
2761: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2762: } else {
2763: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2764: alert("Unable to transfer data to "+url);
2765: }
2766: }
2767: </script>
2768: SCRIPT
2769: }
2770: }
2771: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2772: <script type="text/javascript">
2773: function queue(checkbox_num,val) {
2774: if (document.forms.results.returnvalues.length != "undefined" &&
2775: typeof(document.forms.results.returnvalues.length) == "number") {
2776: if (document.forms.results.returnvalues[checkbox_num].checked) {
2777: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2778: } else {
2779: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2780: }
2781: } else {
2782: if (document.forms.results.returnvalues.checked) {
2783: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2784: } else {
2785: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2786: }
2787: }
2788: }
2789: function select_group() {
2790: parent.window.location=
2791: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2792: parent.statusframe.document.forms.statusform.elements.Queue.value;
2793: }
2794: </script>
2795: SCRIPT
2796: $result.=<<END;
2797: </head>
2798: $bodytag
2799: <form name="results" method="post" action="/adm/searchcat" >
2800: <input type="hidden" name="Queue" value="" />
2801: $importbutton
2802: END
2803: return $result;
2804: }
2805:
2806: ######################################################################
2807: ######################################################################
2808: sub search_status_header {
2809: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2810: return <<ENDSTATUS;
2811: <html><head><title>Search Status</title></head>
2812: $bodytag
2813: <h3>Search Status</h3>
2814: Sending search request to LON-CAPA servers.<br />
2815: ENDSTATUS
2816: }
2817:
2818: sub results_link {
2819: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2820: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2821: my $results_link = $basic_link."&phase=results".
2822: "&pause=1"."&start=1";
2823: return $results_link;
2824: }
2825:
2826: ######################################################################
2827: ######################################################################
2828: sub print_frames_interface {
2829: my $r = shift;
2830: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2831: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2832: my $run_search_link = $basic_link."&phase=run_search";
2833: my $results_link = &results_link();
2834: my $result = <<"ENDFRAMES";
2835: <html>
2836: <head>
2837: <script>
2838: var targetwin = opener;
2839: var queue = '';
2840: </script>
2841: <title>LON-CAPA Digital Library Search Results</title>
2842: </head>
2843: <frameset rows="150,*">
2844: <frame name="statusframe" src="$run_search_link">
2845: <frame name="resultsframe" src="$results_link">
2846: </frameset>
2847: </html>
2848: ENDFRAMES
2849:
2850: $r->print($result);
2851: return;
2852: }
2853:
2854: ######################################################################
2855: ######################################################################
2856:
2857: sub has_stat_data {
2858: my ($values) = @_;
2859: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2860: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2861: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2862: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2863: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2864: return 1;
2865: }
2866: return 0;
2867: }
2868:
2869: sub statfields {
2870: return ('count','stdno','disc','avetries','difficulty');
2871: }
2872:
2873: sub has_eval_data {
2874: my ($values) = @_;
2875: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2876: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2877: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2878: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2879: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
2880: return 1;
2881: }
2882: return 0;
2883: }
2884:
2885: sub evalfields {
2886: return ('clear','technical','correct','helpful','depth');
2887: }
2888:
2889: ######################################################################
2890: ######################################################################
2891:
2892: =pod
2893:
2894: =item Metadata Viewing Functions
2895:
2896: Output is a HTML-ified string.
2897:
2898: Input arguments are title, author, subject, url, keywords, version,
2899: notes, short abstract, mime, language, creation date,
2900: last revision date, owner, copyright, hostname, and
2901: extra custom metadata to show.
2902:
2903: =over 4
2904:
2905: =item &detailed_citation_view()
2906:
2907: =cut
2908:
2909: ######################################################################
2910: ######################################################################
2911: sub detailed_citation_view {
2912: my ($prefix,%values) = @_;
2913: my $result;
2914: $result .= '<b>'.$prefix.
2915: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
2916: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
2917: 'target="search_preview">'.$values{'title'}."</a></b>\n";
2918: $result .= "<p>\n";
2919: $result .= '<b>'.$values{'author'}.'</b>,'.
2920: ' <i>'.$values{'owner'}.'</i><br />';
2921: foreach my $field
2922: (
2923: { name=>'url',
2924: translate => '<b>URL:</b> [_1]',
2925: special => 'url link',},
2926: { name=>'subject',
2927: translate => '<b>Subject:</b> [_1]',},
2928: { name=>'keywords',
2929: translate => '<b>Keywords:</b> [_1]',},
2930: { name=>'notes',
2931: translate => '<b>Notes:</b> [_1]',},
2932: { name=>'mimetag',
2933: translate => '<b>MIME Type:</b> [_1]',},
2934: { name=>'standards',
2935: translate => '<b>Standards:</b>[_1]',},
2936: { name=>'copyrighttag',
2937: translate => '<b>Copyright/Distribution:</b> [_1]',},
2938: { name=>'count',
2939: format => "%d",
2940: translate => '<b>Access Count:</b> [_1]',},
2941: { name=>'stdno',
2942: format => "%d",
2943: translate => '<b>Number of Students:</b> [_1]',},
2944: { name=>'avetries',
2945: format => "%.2f",
2946: translate => '<b>Average Tries:</b> [_1]',},
2947: { name=>'disc',
2948: format => "%.2f",
2949: translate => '<b>Degree of Discrimination:</b> [_1]',},
2950: { name=>'difficulty',
2951: format => "%.2f",
2952: translate => '<b>Degree of Difficulty:</b> [_1]',},
2953: { name=>'clear',
2954: format => "%.2f",
2955: translate => '<b>Clear:</b> [_1]',},
2956: { name=>'depth',
2957: format => "%.2f",
2958: translate => '<b>Depth:</b> [_1]',},
2959: { name=>'helpful',
2960: format => "%.2f",
2961: translate => '<b>Helpful:</b> [_1]',},
2962: { name=>'correct',
2963: format => "%.2f",
2964: translate => '<b>Correct:</b> [_1]',},
2965: { name=>'technical',
2966: format => "%.2f",
2967: translate => '<b>Technical:</b> [_1]',},
2968: { name=>'comefrom_list',
2969: type => 'list',
2970: translate => 'Resources that lead up to this resource in maps',},
2971: { name=>'goto_list',
2972: type => 'list',
2973: translate => 'Resources that follow this resource in maps',},
2974: { name=>'sequsage_list',
2975: type => 'list',
2976: translate => 'Resources using or importing resource',},
2977: ) {
2978: next if (! exists($values{$field->{'name'}}) ||
2979: $values{$field->{'name'}} eq '');
2980: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
2981: $result .= '<b>'.&mt($field->{'translate'}).'</b><ul>';
2982: foreach my $item (split(',',$values{$field->{'name'}})){
2983: $result .= '<li>'.
2984: '<a target="search_preview" '.
2985: 'href="/res/'.$item.'">'.$item.'</a></li>';
2986: }
2987: $result .= '</ul>';
2988: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
2989: $result.= &mt($field->{'translate'},
2990: sprintf($field->{'format'},
2991: $values{$field->{'name'}})).'<br />'."\n";
2992: } else {
2993: if ($field->{'special'} eq 'url link') {
2994: $result.=
2995: &mt($field->{'translate'},
2996: '<a href="'.$values{'url'}.'" '.
2997: 'target="search_preview">'.
2998: $values{$field->{'name'}}.
2999: '</a>');
3000: } else {
3001: $result.= &mt($field->{'translate'},
3002: $values{$field->{'name'}});
3003: }
3004: $result .= "<br />\n";
3005: }
3006: }
3007: $result .= "</p>";
3008: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3009: $result .= '<p>'.$values{'extrashow'}.'</p>';
3010: }
3011: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3012: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3013: }
3014: $result .= '<hr align="left" width="200" noshade />'."\n";
3015: return $result;
3016: }
3017:
3018: ######################################################################
3019: ######################################################################
3020:
3021: =pod
3022:
3023: =item &summary_view()
3024:
3025: =cut
3026: ######################################################################
3027: ######################################################################
3028: sub summary_view {
3029: my ($prefix,%values) = @_;
3030: my $icon=&Apache::loncommon::icon($values{'url'});
3031: my $result=<<END;
3032: $prefix<img src="$icon" />
3033: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3034: target='search_preview'>$values{'author'}</a><br />
3035: $values{'title'}<br />
3036: $values{'owner'} -- $values{'lastrevisiondate'}<br />
3037: $values{'copyrighttag'}<br />
3038: $values{'extrashow'}
3039: </p>
3040: <hr align='left' width='200' noshade />
3041: END
3042: return $result;
3043: }
3044:
3045: ######################################################################
3046: ######################################################################
3047:
3048: =pod
3049:
3050: =item &compact_view()
3051:
3052: =cut
3053:
3054: ######################################################################
3055: ######################################################################
3056: sub compact_view {
3057: my ($prefix,%values) = @_;
3058: my $result =
3059: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
3060: '"> <a href="'.$values{'url'}.'" target="search_preview">'.
3061: $values{'title'}.'</a>'.(' 'x2).
3062: '<b>'.$values{'author'}.'</b><br />';
3063: return $result;
3064: }
3065:
3066:
3067: ######################################################################
3068: ######################################################################
3069:
3070: =pod
3071:
3072: =item &fielded_format_view()
3073:
3074: =cut
3075:
3076: ######################################################################
3077: ######################################################################
3078: sub fielded_format_view {
3079: my ($prefix,%values) = @_;
3080: my $icon=&Apache::loncommon::icon($values{'url'});
3081: my %Translated = &Apache::lonmeta::fieldnames();
3082: my $result=<<END;
3083: $prefix <img src="$icon" />
3084: <dl>
3085: <dt>URL:</dt>
3086: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3087: target='search_preview'>$values{'url'}</a></dd>
3088: END
3089: foreach my $field ('title','author','subject','keywords','notes',
3090: 'mimetag','language','creationdate','lastrevisiondate',
3091: 'owner','copyrighttag','hostname','abstract') {
3092: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3093: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3094: }
3095: if (&has_stat_data(\%values)) {
3096: foreach my $field (&statfields()) {
3097: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3098: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3099: }
3100: }
3101: if (&has_eval_data(\%values)) {
3102: foreach my $field (&evalfields()) {
3103: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3104: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3105: }
3106: }
3107: $result .= "</dl>\n";
3108: $result .= $values{'extrashow'};
3109: $result .= '<hr align="left" width="200" noshade />'."\n";
3110: return $result;
3111: }
3112:
3113: ######################################################################
3114: ######################################################################
3115:
3116: =pod
3117:
3118: =item &xml_sgml_view()
3119:
3120: =back
3121:
3122: =cut
3123:
3124: ######################################################################
3125: ######################################################################
3126: sub xml_sgml_view {
3127: my ($prefix,%values) = @_;
3128: my $xml = '<LonCapaResource>'."\n";
3129: # The usual suspects
3130: foreach my $field ('url','title','author','subject','keywords','notes') {
3131: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3132: }
3133: #
3134: $xml .= "<mimeInfo>\n";
3135: foreach my $field ('mime','mimetag') {
3136: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3137: }
3138: $xml .= "</mimeInfo>\n";
3139: #
3140: $xml .= "<languageInfo>\n";
3141: foreach my $field ('language','languagetag') {
3142: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3143: }
3144: $xml .= "</languageInfo>\n";
3145: #
3146: foreach my $field ('creationdate','lastrevisiondate','owner') {
3147: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3148: }
3149: #
3150: $xml .= "<copyrightInfo>\n";
3151: foreach my $field ('copyright','copyrighttag') {
3152: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3153: }
3154: $xml .= "</copyrightInfo>\n";
3155: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3156: "\n";
3157: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3158: #
3159: if (&has_stat_data(\%values)){
3160: $xml .= "<problemstatistics>\n";
3161: foreach my $field (&statfields()) {
3162: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3163: }
3164: $xml .= "</problemstatistics>\n";
3165: }
3166: #
3167: if (&has_eval_data(\%values)) {
3168: $xml .= "<evaluation>\n";
3169: foreach my $field (&evalfields) {
3170: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3171: }
3172: $xml .= "</evaluation>\n";
3173: }
3174: #
3175: $xml .= "</LonCapaResource>\n";
3176: $xml = &HTML::Entities::encode($xml,'<>&');
3177: my $result=<<END;
3178: $prefix
3179: <pre>
3180: $xml
3181: </pre>
3182: $values{'extrashow'}
3183: <hr align='left' width='200' noshade />
3184: END
3185: return $result;
3186: }
3187:
3188: ######################################################################
3189: ######################################################################
3190:
3191: =pod
3192:
3193: =item &filled() see if field is filled.
3194:
3195: =cut
3196:
3197: ######################################################################
3198: ######################################################################
3199: sub filled {
3200: my ($field)=@_;
3201: if ($field=~/\S/ && $field ne 'any') {
3202: return 1;
3203: } else {
3204: return 0;
3205: }
3206: }
3207:
3208: ######################################################################
3209: ######################################################################
3210:
3211: =pod
3212:
3213: =item &output_blank_field_error()
3214:
3215: Output a complete page that indicates the user has not filled in enough
3216: information to do a search.
3217:
3218: Inputs: $r (Apache request handle), $closebutton, $parms.
3219:
3220: Returns: nothing
3221:
3222: $parms is extra information to include in the 'Revise search request' link.
3223:
3224: =cut
3225:
3226: ######################################################################
3227: ######################################################################
3228: sub output_blank_field_error {
3229: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3230: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3231: # make query information persistent to allow for subsequent revision
3232: $r->print(<<BEGINNING);
3233: <html>
3234: <head>
3235: <title>The LearningOnline Network with CAPA</title>
3236: BEGINNING
3237: $r->print(<<RESULTS);
3238: </head>
3239: $bodytag
3240: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3241: <h1>Search Catalog</h1>
3242: <form method="post" action="/adm/searchcat">
3243: $hidden_fields
3244: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
3245: >Revise search request</a>
3246: $closebutton
3247: <hr />
3248: <h3>Unactionable search query.</h3>
3249: <p>
3250: You did not fill in enough information for the search to be started.
3251: You need to fill in relevant fields on the search page in order
3252: for a query to be processed.
3253: </p>
3254: </body>
3255: </html>
3256: RESULTS
3257: }
3258:
3259: ######################################################################
3260: ######################################################################
3261:
3262: =pod
3263:
3264: =item &output_date_error()
3265:
3266: Output a full html page with an error message.
3267:
3268: Inputs:
3269:
3270: $r, the request pointer.
3271: $message, the error message for the user.
3272: $closebutton, the specialized close button needed for groupsearch.
3273:
3274: =cut
3275:
3276: ######################################################################
3277: ######################################################################
3278: sub output_date_error {
3279: my ($r,$message,$closebutton,$hidden_fields)=@_;
3280: # make query information persistent to allow for subsequent revision
3281: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3282: $r->print(<<RESULTS);
3283: <html>
3284: <head>
3285: <title>The LearningOnline Network with CAPA</title>
3286: </head>
3287: $bodytag
3288: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3289: <h1>Search Catalog</h1>
3290: <form method="post" action="/adm/searchcat">
3291: $hidden_fields
3292: <input type='button' value='Revise search request'
3293: onClick='this.form.submit();' />
3294: $closebutton
3295: <hr />
3296: <h3>Error</h3>
3297: <p>
3298: $message
3299: </p>
3300: </body>
3301: </html>
3302: RESULTS
3303: }
3304:
3305: ######################################################################
3306: ######################################################################
3307:
3308: =pod
3309:
3310: =item &start_fresh_session()
3311:
3312: Cleans the global %groupsearch_db by removing all fields which begin with
3313: 'pre_' or 'store'.
3314:
3315: =cut
3316:
3317: ######################################################################
3318: ######################################################################
3319: sub start_fresh_session {
3320: delete $groupsearch_db{'mode_catalog'};
3321: foreach (keys %groupsearch_db) {
3322: if ($_ =~ /^pre_/) {
3323: delete $groupsearch_db{$_};
3324: }
3325: if ($_ =~ /^store/) {
3326: delete $groupsearch_db{$_};
3327: }
3328: }
3329: }
3330:
3331: 1;
3332:
3333: sub cleanup {
3334: if (tied(%groupsearch_db)) {
3335: unless (untie(%groupsearch_db)) {
3336: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3337: }
3338: }
3339: &untiehash();
3340: &Apache::lonmysql::disconnect_from_db();
3341: }
3342:
3343: __END__
3344:
3345: =pod
3346:
3347: =back
3348:
3349: =cut
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