Annotation of loncom/interface/lonsearchcat.pm, revision 1.110
1.98 harris41 1: # The LearningOnline Network with CAPA
1.108 harris41 2: # Search Catalog
3: #
1.110 ! harris41 4: # $Id: lonsearchcat.pm,v 1.109 2001/12/11 02:18:13 harris41 Exp $
1.108 harris41 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.
1.98 harris41 14: #
1.108 harris41 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/
1.1 www 27: #
1.97 harris41 28: # YEAR=2001
1.104 harris41 29: # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
30: # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
1.110 ! harris41 31: # 10/12,10/14,10/15,10/16,11/28,11/29,12/10 Scott Harrison
1.104 harris41 32: #
33: ###
34:
1.98 harris41 35: ###############################################################################
36: ## ##
37: ## ORGANIZATION OF THIS PERL MODULE ##
38: ## ##
1.105 harris41 39: ## 1. Modules used by this module ##
40: ## 2. Choices for different output views (detailed, summary, xml, etc) ##
41: ## 3. BEGIN block (to be run once after compilation) ##
42: ## 4. Handling routine called via Apache and mod_perl ##
43: ## 5. Other subroutines ##
1.98 harris41 44: ## ##
45: ###############################################################################
46:
1.1 www 47: package Apache::lonsearchcat;
48:
1.98 harris41 49: # ------------------------------------------------- modules used by this module
1.1 www 50: use strict;
51: use Apache::Constants qw(:common);
1.6 harris41 52: use Apache::lonnet();
53: use Apache::File();
1.7 harris41 54: use CGI qw(:standard);
1.41 harris41 55: use Text::Query;
1.101 harris41 56: use GDBM_File;
1.1 www 57:
1.90 harris41 58: # ---------------------------------------- variables used throughout the module
59:
1.98 harris41 60: # -- information holders
61: my %language; # holds contents of language.tab
62: my %cprtag; # holds contents of copyright.tab
63: my %mimetag; # holds contents of filetypes.tab
64: my %hostdomains; # matches host name to host domain
65: my %hostips; # matches host name to host ip
66: my %hitcount; # stores number of hits per host
67:
68: # -- dynamically rendered interface components
69: my $closebutton; # button that closes the search window
70: my $importbutton; # button to take the selected results and go to group sorting
71:
72: # -- miscellaneous variables
73: my $scrout; # string that holds portions of the screen output
74: my $yourself; # allows for quickly limiting to oneself
1.101 harris41 75: my %hash;
1.98 harris41 76:
77: # ------------------------------------------ choices for different output views
78: # Detailed Citation View ---> sub detailed_citation_view
1.90 harris41 79: # Summary View ---> sub summary_view
80: # Fielded Format ---> sub fielded_format_view
81: # XML/SGML ---> sub xml_sgml_view
1.55 harris41 82: my $basicviewselect=<<END;
83: <select name='basicviewselect'>
84: <option value='Detailed Citation View'>Detailed Citation View</option>
85: <option value='Summary View'>Summary View</option>
86: <option value='Fielded Format'>Fielded Format</option>
87: <option value='XML/SGML'>XML/SGML</option>
88: </select>
89: END
90: my $advancedviewselect=<<END;
91: <select name='advancedviewselect'>
1.50 harris41 92: <option value='Detailed Citation View'>Detailed Citation View</option>
93: <option value='Summary View'>Summary View</option>
94: <option value='Fielded Format'>Fielded Format</option>
95: <option value='XML/SGML'>XML/SGML</option>
1.46 harris41 96: </select>
97: END
1.3 harris41 98:
1.98 harris41 99: # ----------------------------------------------------------------------- BEGIN
100: sub BEGIN {
1.8 harris41 101: # --------------------------------- Compute various listings of metadata values
1.3 harris41 102: $language{'any'}='Any language';
103: {
1.98 harris41 104: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
105: '/language.tab');
1.109 harris41 106: while (<$fh>) {
1.57 harris41 107: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
1.3 harris41 108: $language{$1}=$2;
1.109 harris41 109: }
1.3 harris41 110: }
111: $cprtag{'any'}='Any copyright/distribution';
112: {
1.98 harris41 113: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
114: '/copyright.tab');
1.109 harris41 115: while (<$fh>) {
1.57 harris41 116: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
1.3 harris41 117: $cprtag{$1}=$2;
1.109 harris41 118: }
1.3 harris41 119: }
120: $mimetag{'any'}='Any type';
121: {
1.98 harris41 122: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
123: '/filetypes.tab');
1.109 harris41 124: while (<$fh>) {
1.110 ! harris41 125: if (/^\S/ and !/^\#/) {
! 126: $_=~/(\S+)\s+(\S+)\s+([\S\s\-]+)/; chomp;
! 127: $mimetag{$1}=".$1 $3";
! 128: }
1.109 harris41 129: }
1.3 harris41 130: }
1.98 harris41 131: {
132: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
133: '/hosts.tab');
1.109 harris41 134: while (<$fh>) {
1.98 harris41 135: $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp;
136: if ($3 eq 'library') {
137: $hostdomains{$1}=$2;
138: $hostips{$1}=$4;
139: }
1.109 harris41 140: }
1.98 harris41 141: }
142: }
143:
1.101 harris41 144: my $diropendb = "";
145: my $domain = "";
146:
1.98 harris41 147: # ----------------------------- Handling routine called via Apache and mod_perl
148: sub handler {
149: my $r = shift;
1.103 harris41 150: untie %hash;
1.98 harris41 151: &get_unprocessed_cgi();
152:
153: $r->content_type('text/html');
154: $r->send_http_header;
155: return OK if $r->header_only;
156:
1.101 harris41 157: $domain = $r->dir_config('lonDefDomain');
158:
1.104 harris41 159: $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
1.101 harris41 160:
161: if ($ENV{'form.launch'} eq '1') {
162: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
163: &start_fresh_session();
164: untie %hash;
165: }
166: else {
167: $r->print('<html><head></head><body>Unable to tie hash to db '.
168: 'file</body></html>');
169: return OK;
170: }
171: }
172:
1.98 harris41 173: # ----------------------------------- configure dynamic components of interface
174: my $hidden='';
175: if ($ENV{'form.catalogmode'} eq 'interactive') {
176: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
177: "\n";
178: $closebutton="<input type='button' name='close' value='CLOSE' ".
179: "onClick='self.close()'>"."\n";
180: }
181: elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
182: $hidden=<<END;
183: <input type='hidden' name='catalogmode' value='groupsearch'>
184: END
185: $closebutton=<<END;
186: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
187: END
188: $importbutton=<<END;
189: <input type='button' name='import' value='IMPORT'
190: onClick='javascript:select_group()'>
191: END
192: }
193:
194: # ------------------------------------------------------ Determine current user
195: $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
196:
197: # --- Now, depending on the interface actions, do one of three things here:
198: # --- 1. a basic search
199: # --- 2. an advanced search
200: # --- 3. output a search interface
1.3 harris41 201:
1.90 harris41 202: # ----------------------------------- See if a search invocation should be done
1.6 harris41 203: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
1.101 harris41 204: untie %hash; return &basicsearch($r,\%ENV);
1.6 harris41 205: }
1.18 harris41 206: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
1.101 harris41 207: untie %hash; return &advancedsearch($r,\%ENV);
1.18 harris41 208: }
1.6 harris41 209:
1.90 harris41 210: # ----------------------------- Else, begin building search interface to output
1.8 harris41 211: $scrout=''; # building a part of screen output
1.3 harris41 212: $scrout.=&searchphrasefield('Limit by title','title',
1.11 harris41 213: $ENV{'form.title'});
1.3 harris41 214:
215: $scrout.=&searchphrasefield('Limit by author','author',
1.11 harris41 216: $ENV{'form.author'});
1.3 harris41 217:
218: $scrout.=&searchphrasefield('Limit by subject','subject',
1.11 harris41 219: $ENV{'form.subject'});
220:
221: $scrout.=&searchphrasefield('Limit by keywords','keywords',
222: $ENV{'form.keywords'});
223:
224: $scrout.=&searchphrasefield('Limit by URL','url',
225: $ENV{'form.url'});
226:
1.96 harris41 227: # $scrout.=&searchphrasefield('Limit by version','version',
228: # $ENV{'form.version'});
1.3 harris41 229:
230: $scrout.=&searchphrasefield('Limit by notes','notes',
1.11 harris41 231: $ENV{'form.notes'});
1.3 harris41 232:
233: $scrout.=&searchphrasefield('Limit by abstract','abstract',
1.11 harris41 234: $ENV{'form.abstract'});
1.3 harris41 235:
1.110 ! harris41 236: $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});
1.3 harris41 237: $scrout.=&selectbox('Limit by MIME type','mime',
1.11 harris41 238: $ENV{'form.mime'},%mimetag);
239:
240: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
1.3 harris41 241:
242: $scrout.=&selectbox('Limit by language','language',
1.11 harris41 243: $ENV{'form.language'},%language);
1.3 harris41 244:
1.8 harris41 245:
246: # ------------------------------------------------ Compute date selection boxes
247: $scrout.=<<CREATIONDATESTART;
1.3 harris41 248: <p>
249: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
250: </font>
1.98 harris41 251: <br />
1.8 harris41 252: between:
253: CREATIONDATESTART
1.11 harris41 254: $scrout.=&dateboxes('creationdatestart',1,1,1976,
255: $ENV{'form.creationdatestart_month'},
256: $ENV{'form.creationdatestart_day'},
257: $ENV{'form.creationdatestart_year'},
258: );
1.8 harris41 259: $scrout.=<<CREATIONDATEEND;
260: and:
261: CREATIONDATEEND
1.11 harris41 262: $scrout.=&dateboxes('creationdateend',12,31,2051,
263: $ENV{'form.creationdateend_month'},
264: $ENV{'form.creationdateend_day'},
265: $ENV{'form.creationdateend_year'},
266: );
1.8 harris41 267: $scrout.="</p>";
268:
269: $scrout.=<<LASTREVISIONDATESTART;
270: <p>
271: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
272: </b></font>
1.98 harris41 273: <br />between:
1.8 harris41 274: LASTREVISIONDATESTART
1.11 harris41 275: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
276: $ENV{'form.lastrevisiondatestart_month'},
277: $ENV{'form.lastrevisiondatestart_day'},
278: $ENV{'form.lastrevisiondatestart_year'},
279: );
1.8 harris41 280: $scrout.=<<LASTREVISIONDATEEND;
281: and:
282: LASTREVISIONDATEEND
1.11 harris41 283: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
284: $ENV{'form.lastrevisiondateend_month'},
285: $ENV{'form.lastrevisiondateend_day'},
286: $ENV{'form.lastrevisiondateend_year'},
287: );
1.8 harris41 288: $scrout.='</p>';
289:
290: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
1.11 harris41 291: $ENV{'form.owner'});
1.8 harris41 292:
1.11 harris41 293: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
1.8 harris41 294: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
1.11 harris41 295: $ENV{'form.copyright'},%cprtag);
1.8 harris41 296:
1.14 harris41 297: # ------------------------------------------- Compute customized metadata field
298: $scrout.=<<CUSTOMMETADATA;
299: <p>
1.77 harris41 300: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
1.14 harris41 301: </font>
1.77 harris41 302: For resource-specific metadata, enter in an expression in the form of
1.100 harris41 303: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
1.14 harris41 304: <b>Example:</b> grandmother=75 OR grandfather=85
1.98 harris41 305: <br />
1.14 harris41 306: CUSTOMMETADATA
307: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
1.15 harris41 308: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
1.14 harris41 309:
1.77 harris41 310: $scrout.=<<CUSTOMSHOW;
311: <p>
312: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
313: </font>
314: Enter in a space-separated list of special metadata fields to show
315: in a fielded listing for each record result.
1.98 harris41 316: <br />
1.77 harris41 317: CUSTOMSHOW
318: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
319: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
320:
1.8 harris41 321: # ---------------------------------------------------------------- Print screen
322: $r->print(<<ENDDOCUMENT);
323: <html>
324: <head>
325: <title>The LearningOnline Network with CAPA</title>
1.100 harris41 326: <script type="text/javascript">
327: function openhelp(val) {
328: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
329: 'scrollbars=1,width=400,height=300');
330: openhelpwin.focus();
331: }
332: </script>
1.8 harris41 333: </head>
334: <body bgcolor="#FFFFFF">
1.98 harris41 335: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1.8 harris41 336: <h1>Search Catalog</h1>
337: <form method="post" action="/adm/searchcat">
338: $hidden
1.98 harris41 339: <hr />
1.8 harris41 340: <h3>Basic Search</h3>
341: <p>
342: Enter terms or phrases separated by search operators
1.100 harris41 343: such as AND, OR, or NOT then press SEARCH below. Terms should be specific
1.8 harris41 344: to the title, author, subject, notes, or abstract information associated
345: with a resource.
1.98 harris41 346: <br />
1.11 harris41 347: ENDDOCUMENT
348: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
349: $r->print(' ');
350: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
351: $r->print('<font color="#800000">Title only</font> ');
1.96 harris41 352: # $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
353: # <font color="#800000">Search historic archives</font>
1.11 harris41 354: $r->print(<<ENDDOCUMENT);
1.98 harris41 355: <br />
1.68 harris41 356: <input type="submit" name="basicsubmit" value='SEARCH' />
357: <input type="reset" name="reset" value='RESET' />
1.46 harris41 358: $closebutton
1.55 harris41 359: $basicviewselect
1.100 harris41 360: <input type="button" value="HELP" onClick="openhelp()" />
1.8 harris41 361: </p>
1.98 harris41 362: <hr />
1.8 harris41 363: <h3>Advanced Search</h3>
364: $scrout
365: <p>
1.68 harris41 366: <input type="submit" name="advancedsubmit" value='SEARCH' />
367: <input type="reset" name="reset" value='RESET' />
1.46 harris41 368: $closebutton
1.55 harris41 369: $advancedviewselect
1.100 harris41 370: <input type="button" value="HELP" onClick="openhelp()" />
1.3 harris41 371: </p>
1.8 harris41 372: </form>
373: </body>
374: </html>
375: ENDDOCUMENT
376: return OK;
377: }
378:
1.98 harris41 379: # ----------- grab unprocessed CGI variables that may have been appended to URL
380: sub get_unprocessed_cgi {
1.109 harris41 381: foreach (split(/&/,$ENV{'QUERY_STRING'})) {
1.98 harris41 382: my ($name, $value) = split(/=/,$_);
383: $value =~ tr/+/ /;
384: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.101 harris41 385: if ($name eq 'catalogmode' or $name eq 'launch' or $name eq 'acts') {
1.98 harris41 386: $ENV{'form.'.$name}=$value;
387: }
1.109 harris41 388: }
1.98 harris41 389: }
390:
391: # ------------------------------------------------------------- make persistent
392: sub make_persistent {
393: my $persistent='';
394:
1.109 harris41 395: foreach (keys %ENV) {
1.98 harris41 396: if (/^form\./ && !/submit/) {
397: my $name=$_;
398: my $key=$name;
399: $ENV{$key}=~s/\'//g; # do not mess with html field syntax
400: $name=~s/^form\.//;
401: $persistent.=<<END;
402: <input type='hidden' name='$name' value='$ENV{$key}' />
403: END
404: }
1.109 harris41 405: }
1.98 harris41 406: return $persistent;
407: }
408:
1.8 harris41 409: # --------------------------------------------------------- Various form fields
410:
1.11 harris41 411: sub simpletextfield {
412: my ($name,$value)=@_;
1.68 harris41 413: return '<input type=text name=\''.$name.
414: '\' size=20 value=\''.$value.'\' />';
1.11 harris41 415: }
416:
417: sub simplecheckbox {
418: my ($name,$value)=@_;
419: my $checked='';
420: $checked="CHECKED" if $value eq 'on';
1.68 harris41 421: return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
1.11 harris41 422: }
423:
1.8 harris41 424: sub searchphrasefield {
425: my ($title,$name,$value)=@_;
426: my $instruction=<<END;
427: Enter terms or phrases separated by search operators such
1.100 harris41 428: as AND, OR, or NOT.
1.8 harris41 429: END
430: my $uctitle=uc($title);
431: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
1.98 harris41 432: "</FONT> $instruction<br />".
1.68 harris41 433: '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
1.8 harris41 434: }
1.3 harris41 435:
1.8 harris41 436: sub dateboxes {
1.11 harris41 437: my ($name,$defaultmonth,$defaultday,$defaultyear,
438: $currentmonth,$currentday,$currentyear)=@_;
439: ($defaultmonth,$defaultday,$defaultyear)=('','','');
440: my $month=<<END;
1.8 harris41 441: <select name="${name}_month">
1.11 harris41 442: <option value='$defaultmonth'> </option>
443: <option value="1">January</option>
444: <option value="2">February</option>
445: <option value="3">March</option>
446: <option value="4">April</option>
447: <option value="5">May</option>
448: <option value="6">June</option>
449: <option value="7">July</option>
450: <option value="8">August</option>
451: <option value="9">September</option>
1.3 harris41 452: <option value="10">October</option>
453: <option value="11">November</option>
454: <option value="12">December</option>
455: </select>
1.11 harris41 456: END
457: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
458: my $day=<<END;
1.8 harris41 459: <select name="${name}_day">
1.11 harris41 460: <option value='$defaultday'> </option>
461: <option value="1">1</option>
462: <option value="2">2</option>
463: <option value="3">3</option>
464: <option value="4">4</option>
465: <option value="5">5</option>
466: <option value="6">6</option>
467: <option value="7">7</option>
468: <option value="8">8</option>
469: <option value="9">9</option>
470: <option value="10">10</option>
471: <option value="11">11</option>
472: <option value="12">12</option>
473: <option value="13">13</option>
474: <option value="14">14</option>
475: <option value="15">15</option>
476: <option value="16">16</option>
477: <option value="17">17</option>
478: <option value="18">18</option>
479: <option value="19">19</option>
480: <option value="20">20</option>
481: <option value="21">21</option>
482: <option value="22">22</option>
483: <option value="23">23</option>
484: <option value="24">24</option>
485: <option value="25">25</option>
486: <option value="26">26</option>
487: <option value="27">27</option>
488: <option value="28">28</option>
489: <option value="29">29</option>
490: <option value="30">30</option>
491: <option value="31">31</option>
1.3 harris41 492: </select>
1.11 harris41 493: END
494: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
495: my $year=<<END;
1.8 harris41 496: <select name="${name}_year">
1.11 harris41 497: <option value='$defaultyear'> </option>
498: <option value="1976">1976</option>
499: <option value="1977">1977</option>
500: <option value="1978">1978</option>
501: <option value="1979">1979</option>
502: <option value="1980">1980</option>
503: <option value="1981">1981</option>
504: <option value="1982">1982</option>
505: <option value="1983">1983</option>
506: <option value="1984">1984</option>
507: <option value="1985">1985</option>
508: <option value="1986">1986</option>
509: <option value="1987">1987</option>
510: <option value="1988">1988</option>
511: <option value="1989">1989</option>
512: <option value="1990">1990</option>
513: <option value="1991">1991</option>
514: <option value="1992">1992</option>
515: <option value="1993">1993</option>
516: <option value="1994">1994</option>
517: <option value="1995">1995</option>
518: <option value="1996">1996</option>
519: <option value="1997">1997</option>
520: <option value="1998">1998</option>
521: <option value="1999">1999</option>
522: <option value="2000">2000</option>
523: <option value="2001">2001</option>
524: <option value="2002">2002</option>
525: <option value="2003">2003</option>
526: <option value="2004">2004</option>
527: <option value="2005">2005</option>
528: <option value="2006">2006</option>
529: <option value="2007">2007</option>
530: <option value="2008">2008</option>
531: <option value="2009">2009</option>
532: <option value="2010">2010</option>
533: <option value="2011">2011</option>
534: <option value="2012">2012</option>
535: <option value="2013">2013</option>
536: <option value="2014">2014</option>
537: <option value="2015">2015</option>
538: <option value="2016">2016</option>
539: <option value="2017">2017</option>
540: <option value="2018">2018</option>
541: <option value="2019">2019</option>
542: <option value="2020">2020</option>
543: <option value="2021">2021</option>
544: <option value="2022">2022</option>
545: <option value="2023">2023</option>
546: <option value="2024">2024</option>
547: <option value="2025">2025</option>
548: <option value="2026">2026</option>
549: <option value="2027">2027</option>
550: <option value="2028">2028</option>
551: <option value="2029">2029</option>
552: <option value="2030">2030</option>
553: <option value="2031">2031</option>
554: <option value="2032">2032</option>
555: <option value="2033">2033</option>
556: <option value="2034">2034</option>
557: <option value="2035">2035</option>
558: <option value="2036">2036</option>
559: <option value="2037">2037</option>
560: <option value="2038">2038</option>
561: <option value="2039">2039</option>
562: <option value="2040">2040</option>
563: <option value="2041">2041</option>
564: <option value="2042">2042</option>
565: <option value="2043">2043</option>
566: <option value="2044">2044</option>
567: <option value="2045">2045</option>
568: <option value="2046">2046</option>
569: <option value="2047">2047</option>
570: <option value="2048">2048</option>
571: <option value="2049">2049</option>
572: <option value="2050">2050</option>
573: <option value="2051">2051</option>
1.3 harris41 574: </select>
575: END
1.11 harris41 576: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
577: return "$month$day$year";
1.3 harris41 578: }
579:
580: sub selectbox {
581: my ($title,$name,$value,%options)=@_;
582: my $uctitle=uc($title);
583: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
1.98 harris41 584: "</b></font><br />".'<select name="'.$name.'">';
1.109 harris41 585: foreach (sort keys %options) {
1.68 harris41 586: $selout.='<option value=\''.$_.'\'';
1.3 harris41 587: if ($_ eq $value) { $selout.=' selected'; }
588: $selout.='>'.$options{$_}.'</option>';
1.109 harris41 589: }
1.3 harris41 590: return $selout.'</select>';
1.6 harris41 591: }
592:
1.45 harris41 593: # ----------------------------------------------- Performing an advanced search
1.18 harris41 594: sub advancedsearch {
595: my ($r,$envhash)=@_;
596: my %ENV=%{$envhash};
597:
1.32 harris41 598: my $fillflag=0;
1.64 harris41 599: # Clean up fields for safety
600: for my $field ('title','author','subject','keywords','url','version',
601: 'creationdatestart_month','creationdatestart_day',
602: 'creationdatestart_year','creationdateend_month',
603: 'creationdateend_day','creationdateend_year',
604: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
605: 'lastrevisiondatestart_year','lastrevisiondateend_month',
606: 'lastrevisiondateend_day','lastrevisiondateend_year',
607: 'notes','abstract','mime','language','owner',
1.77 harris41 608: 'custommetadata','customshow') {
1.101 harris41 609: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1.64 harris41 610: }
1.90 harris41 611:
612: # Check to see if enough information was filled in
1.32 harris41 613: for my $field ('title','author','subject','keywords','url','version',
614: 'notes','abstract','mime','language','owner',
615: 'custommetadata') {
1.40 harris41 616: if (&filled($ENV{"form.$field"})) {
1.32 harris41 617: $fillflag++;
618: }
619: }
620: unless ($fillflag) {
621: &output_blank_field_error($r);
622: return OK;
623: }
1.39 harris41 624:
1.90 harris41 625:
626: # Turn the form input into a SQL-based query
1.39 harris41 627: my $query='';
1.44 harris41 628:
1.45 harris41 629: my @queries;
1.90 harris41 630: # Evaluate logical expression AND/OR/NOT phrase fields.
1.58 harris41 631: foreach my $field ('title','author','subject','notes','abstract','url',
632: 'keywords','version','owner') {
1.44 harris41 633: if ($ENV{'form.'.$field}) {
1.45 harris41 634: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
1.44 harris41 635: }
636: }
1.90 harris41 637: # Evaluate option lists
1.58 harris41 638: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1.90 harris41 639: push @queries,"(language like \"$ENV{'form.language'}\")";
1.58 harris41 640: }
641: if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
1.90 harris41 642: push @queries,"(mime like \"$ENV{'form.mime'}\")";
1.58 harris41 643: }
644: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1.90 harris41 645: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1.58 harris41 646: }
1.90 harris41 647: # Evaluate date windows
1.60 harris41 648: my $datequery=&build_date_queries(
649: $ENV{'form.creationdatestart_month'},
650: $ENV{'form.creationdatestart_day'},
651: $ENV{'form.creationdatestart_year'},
652: $ENV{'form.creationdateend_month'},
653: $ENV{'form.creationdateend_day'},
654: $ENV{'form.creationdateend_year'},
655: $ENV{'form.lastrevisiondatestart_month'},
656: $ENV{'form.lastrevisiondatestart_day'},
657: $ENV{'form.lastrevisiondatestart_year'},
658: $ENV{'form.lastrevisiondateend_month'},
659: $ENV{'form.lastrevisiondateend_day'},
660: $ENV{'form.lastrevisiondateend_year'},
661: );
1.90 harris41 662: # Test to see if date windows are legitimate
1.61 harris41 663: if ($datequery=~/^Incorrect/) {
664: &output_date_error($r,$datequery);
665: return OK;
666: }
667: elsif ($datequery) {
1.60 harris41 668: push @queries,$datequery;
669: }
1.90 harris41 670:
671: # Process form information for custom metadata querying
1.76 harris41 672: my $customquery='';
1.64 harris41 673: if ($ENV{'form.custommetadata'}) {
674: $customquery=&build_custommetadata_query('custommetadata',
675: $ENV{'form.custommetadata'});
676: }
1.83 harris41 677: my $customshow='';
678: if ($ENV{'form.customshow'}) {
679: $customshow=$ENV{'form.customshow'};
680: $customshow=~s/[^\w\s]//g;
681: my @fields=split(/\s+/,$customshow);
682: $customshow=join(" ",@fields);
683: }
1.90 harris41 684: # Send query statements over the network to be processed by either the SQL
685: # database or a recursive scheme of 'grep'-like actions (for custom
686: # metadata).
1.45 harris41 687: if (@queries) {
1.58 harris41 688: $query=join(" AND ",@queries);
1.46 harris41 689: $query="select * from metadata where $query";
1.90 harris41 690: my $reply; # reply hash reference
1.83 harris41 691: unless ($customquery or $customshow) {
1.76 harris41 692: $reply=&Apache::lonnet::metadata_query($query);
693: }
694: else {
1.83 harris41 695: $reply=&Apache::lonnet::metadata_query($query,
696: $customquery,$customshow);
1.76 harris41 697: }
1.64 harris41 698: &output_results('Advanced',$r,$envhash,$customquery,$reply);
1.45 harris41 699: }
1.86 harris41 700: elsif ($customquery) {
1.90 harris41 701: my $reply; # reply hash reference
1.86 harris41 702: $reply=&Apache::lonnet::metadata_query('',
703: $customquery,$customshow);
704: &output_results('Advanced',$r,$envhash,$customquery,$reply);
1.45 harris41 705: }
1.92 harris41 706: # should not get to this point
707: return 'Error. Should not have gone to this point.';
1.18 harris41 708: }
709:
1.6 harris41 710: # --------------------------------------------------- Performing a basic search
711: sub basicsearch {
1.19 harris41 712: my ($r,$envhash)=@_;
713: my %ENV=%{$envhash};
1.64 harris41 714: # Clean up fields for safety
715: for my $field ('basicexp') {
716: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
717: }
718:
1.90 harris41 719: # Check to see if enough is filled in
1.26 harris41 720: unless (&filled($ENV{'form.basicexp'})) {
1.24 harris41 721: &output_blank_field_error($r);
722: return OK;
723: }
1.22 harris41 724:
1.90 harris41 725: # Build SQL query string based on form page
1.39 harris41 726: my $query='';
1.33 harris41 727: my $concatarg=join('," ",',
728: ('title', 'author', 'subject', 'notes', 'abstract'));
1.95 harris41 729: $concatarg='title' if $ENV{'form.titleonly'};
1.94 harris41 730:
731: $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
732:
1.90 harris41 733: # Get reply (either a hash reference to filehandles or bad connection)
1.94 harris41 734: my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
1.90 harris41 735:
736: # Output search results
1.98 harris41 737:
1.44 harris41 738: &output_results('Basic',$r,$envhash,$query,$reply);
1.90 harris41 739:
1.18 harris41 740: return OK;
1.22 harris41 741: }
742:
1.98 harris41 743: # ------------------------------------------------------------- build_SQL_query
744: sub build_SQL_query {
745: my ($field_name,$logic_statement)=@_;
746: my $q=new Text::Query('abc',
747: -parse => 'Text::Query::ParseAdvanced',
748: -build => 'Text::Query::Build');
749: $q->prepare($logic_statement);
750: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
751: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
752: return $sql_query;
753: }
754:
755: # ------------------------------------------------- build custom metadata query
756: sub build_custommetadata_query {
757: my ($field_name,$logic_statement)=@_;
758: my $q=new Text::Query('abc',
759: -parse => 'Text::Query::ParseAdvanced',
760: -build => 'Text::Query::BuildAdvancedString');
761: $q->prepare($logic_statement);
762: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
763: # quick fix to change literal into xml tag-matching
764: # will eventually have to write a separate builder module
765: my $oldmatchexp=$matchexp;
766: $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
767: return $matchexp;
768: }
769:
770: # - Recursively parse a reverse notation expression into a SQL query expression
771: sub recursive_SQL_query_build {
772: my ($dkey,$pattern)=@_;
773: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
774: return $pattern unless @matches;
775: foreach my $match (@matches) {
776: $match=~/\[ (\w+)\s(.*) \]/;
777: my ($key,$value)=($1,$2);
778: my $replacement='';
779: if ($key eq 'literal') {
780: $replacement="($dkey like \"\%$value\%\")";
781: }
782: elsif ($key eq 'not') {
783: $value=~s/like/not like/;
784: # $replacement="($dkey not like $value)";
785: $replacement="$value";
786: }
787: elsif ($key eq 'and') {
788: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
789: $replacement="($1 AND $2)";
790: }
791: elsif ($key eq 'or') {
792: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
793: $replacement="($1 OR $2)";
794: }
795: substr($pattern,
796: index($pattern,$match),
797: length($match),
798: $replacement
799: );
800: }
801: &recursive_SQL_query_build($dkey,$pattern);
802: }
1.22 harris41 803:
1.98 harris41 804: # ------------------------------------------------------------ Build date query
805: sub build_date_queries {
806: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
807: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
808: my @queries;
809: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
810: unless ($cmonth1 and $cday1 and $cyear1 and
811: $cmonth2 and $cday2 and $cyear2) {
812: return "Incorrect entry for the creation date. You must specify ".
813: "a starting month, day, and year and an ending month, ".
814: "day, and year.";
815: }
816: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
817: $cnumeric1+=0;
818: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
819: $cnumeric2+=0;
820: if ($cnumeric1>$cnumeric2) {
821: return "Incorrect entry for the creation date. The starting ".
822: "date must occur before the ending date.";
823: }
824: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
825: "$cyear2-$cmonth2-$cday2 23:59:59')";
826: push @queries,$cquery;
827: }
828: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
829: unless ($lmonth1 and $lday1 and $lyear1 and
830: $lmonth2 and $lday2 and $lyear2) {
831: return "Incorrect entry for the last revision date. You must ".
832: "specify a starting month, day, and year and an ending ".
833: "month, day, and year.";
834: }
835: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
836: $lnumeric1+=0;
837: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
838: $lnumeric2+=0;
839: if ($lnumeric1>$lnumeric2) {
840: return "Incorrect entry for the last revision date. The ".
841: "starting date must occur before the ending date.";
842: }
843: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
844: "$lyear2-$lmonth2-$lday2 23:59:59')";
845: push @queries,$lquery;
846: }
847: if (@queries) {
848: return join(" AND ",@queries);
849: }
850: return '';
1.18 harris41 851: }
1.6 harris41 852:
1.18 harris41 853: # ----------------------------- format and output results based on a reply list
1.98 harris41 854: # There are two windows that this function writes to. The main search
855: # window ("srch") has a listing of the results. A secondary window ("popwin")
856: # gives the status of the network search (time elapsed, number of machines
857: # contacted, etc.)
1.18 harris41 858: sub output_results {
1.101 harris41 859: my $fnum; # search result counter
1.92 harris41 860: my ($mode,$r,$envhash,$query,$replyref)=@_;
1.19 harris41 861: my %ENV=%{$envhash};
1.92 harris41 862: my %rhash=%{$replyref};
1.44 harris41 863: my $compiledresult='';
1.102 harris41 864: my $timeremain=300;
1.98 harris41 865: my $elapsetime=0;
1.93 harris41 866: my $resultflag=0;
867: my $tflag=1;
868:
869: # make query information persistent to allow for subsequent revision
870: my $persistent=&make_persistent();
871:
872: # output beginning of search page
1.92 harris41 873: $r->print(<<BEGINNING);
874: <html>
875: <head>
876: <title>The LearningOnline Network with CAPA</title>
877: BEGINNING
1.98 harris41 878:
879: # conditional output of script functions dependent on the mode in
880: # which the search was invoked
1.92 harris41 881: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
1.100 harris41 882: <script type="text/javascript">
1.92 harris41 883: function select_data(title,url) {
884: changeTitle(title);
885: changeURL(url);
1.97 harris41 886: self.close();
1.92 harris41 887: }
888: function changeTitle(val) {
889: if (opener.inf.document.forms.resinfo.elements.t) {
890: opener.inf.document.forms.resinfo.elements.t.value=val;
891: }
892: }
893: function changeURL(val) {
894: if (opener.inf.document.forms.resinfo.elements.u) {
895: opener.inf.document.forms.resinfo.elements.u.value=val;
896: }
897: }
898: </script>
899: SCRIPT
1.98 harris41 900: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
1.100 harris41 901: <script type="text/javascript">
1.98 harris41 902: function select_data(title,url) {
1.101 harris41 903: // alert('DEBUG: Should be storing '+title+' and '+url);
1.98 harris41 904: }
905: function queue(val) {
1.101 harris41 906: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
1.98 harris41 907: document.forms.results.acts.value+='1a'+val+'b';
908: }
909: else {
910: document.forms.results.acts.value+='0a'+val+'b';
911: }
912: }
913: function select_group() {
1.101 harris41 914: window.location="/adm/groupsort?catalogmode=groupsearch&acts="+
915: document.forms.results.acts.value;
1.98 harris41 916: }
917: </script>
918: SCRIPT
1.100 harris41 919: $r->print(<<SCRIPT);
920: <script type="text/javascript">
1.98 harris41 921: function displayinfo(val) {
922: popwin.document.forms.popremain.sdetails.value=val;
923: }
1.100 harris41 924: function openhelp(val) {
925: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
926: 'scrollbars=1,width=400,height=300');
927: openhelpwin.focus();
928: }
1.102 harris41 929: function abortsearch(val) {
930: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
931: 'scrollbars=1,width=400,height=300');
932: openhelpwin.focus();
933: }
1.98 harris41 934: </script>
935: SCRIPT
936: $r->rflush();
937:
938: # begin showing the cataloged results
1.92 harris41 939: $r->print(<<CATALOGBEGIN);
940: </head>
941: <body bgcolor="#ffffff">
942: <img align=right src=/adm/lonIcons/lonlogos.gif>
943: <h1>Search Catalog</h1>
944: CATALOGBEGIN
1.98 harris41 945: $r->print(<<CATALOGCONTROLS);
946: <form name='results' method="post" action="/adm/searchcat">
947: <input type='hidden' name='acts' value='' />
1.93 harris41 948: <input type='button' value='Revise search request'
1.98 harris41 949: onClick='this.form.submit();' />
950: $importbutton
1.93 harris41 951: $closebutton
952: $persistent
1.98 harris41 953: <hr />
1.93 harris41 954: <h3>Search Query</h3>
1.98 harris41 955: CATALOGCONTROLS
1.93 harris41 956: if ($mode eq 'Basic') {
957: $r->print(<<RESULTS);
958: <p>
959: <b>Basic search:</b> $ENV{'form.basicexp'}
960: </p>
961: RESULTS
962: }
963: elsif ($mode eq 'Advanced') {
964: $r->print(<<RESULTS);
965: <p>
966: <b>Advanced search</b>
967: $query
968: </p>
969: RESULTS
970: }
971: $r->print('<h3>Search Results</h3>');
1.92 harris41 972: $r->rflush();
1.98 harris41 973: my $servernum=(keys %rhash)+0;
974:
975: # define server grid (shows status of multiple machines)
976: my $hcinit;
977: my $grid="'<br />'+";
978: $grid.="\n";
979: my $sn=1;
980: for my $sk (sort keys %rhash) {
981: # '<a href="
982: $grid.="'<a href=\"";
983: # javascript:displayinfo('+
984: $grid.="javascript:opener.displayinfo('+";
985: # "'"+'key
986: $grid.="\"'\"+'";
1.99 harris41 987: $grid.=$sk;
1.98 harris41 988: my $hc;
989: if ($rhash{$sk} eq 'con_lost') {
990: $hc="!!!BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR!!!";
991: }
992: else {
993: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1.99 harris41 994: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1.98 harris41 995: }
996: $grid.=" hitcount=".$hc;
1.99 harris41 997: $grid.=" domain=".$hostdomains{$sk};
1.98 harris41 998: $grid.=" IP=".$hostips{$sk};
999: # '+"'"+'">'+
1000: $grid.="'+\"'\"+')\">'+";
1001: $grid.="\n";
1002: $grid.="'<img border=\"0\" name=\"img".$sn."\"".
1.99 harris41 1003: " src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk."\" /></a>'+\n";
1.98 harris41 1004: $grid.="'<br />'+\n" unless $sn%10;
1005: $sn++;
1006: }
1.92 harris41 1007: $r->print(<<ENDPOP);
1.100 harris41 1008: <script type="text/javascript">
1.98 harris41 1009: popwin=open('','popwin','scrollbars=1,width=400,height=200');
1010: popwin.focus();
1011: popwin.document.writeln('<'+'html>');
1012: popwin.document.writeln('<'+'head>');
1013: popwin.document.writeln('<'+'script>');
1014: popwin.document.writeln('hc=new Array();$hcinit');
1015: popwin.document.writeln('<'+'/script>');
1016: popwin.document.writeln('<'+'/head>'+
1017: '<'+'body bgcolor="#FFFFFF">'+
1.100 harris41 1018: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1.99 harris41 1019: 'lonanim.gif" '+
1020: 'alt="animated logo" />'+
1.98 harris41 1021: '<'+'h3>Search Results Progress<'+'/h3>'+
1022: '<'+'form name="popremain">'+
1023: '<'+'tt>'+
1.99 harris41 1024: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1.98 harris41 1025: '<'+'br />SCANNING $servernum SERVERS'+
1026: '<'+'br clear="all" />Number of record hits found '+
1027: '<'+'input type="text" size="10" name="numhits"'+
1028: ' value="0" />'+
1029: '<'+'br clear="all" />Time elapsed '+
1030: '<'+'input type="text" size="10" name="elapsetime"'+
1031: ' value="0" />'+
1032: '<'+'br />'+
1033: 'SERVER GRID (click on any cell for details)'+
1034: $grid
1035: '<'+'br />'+
1036: 'Server details '+
1037: '<'+'input type="text" size="25" name="sdetails"'+
1038: ' value="" />'+
1039: '<'+'br />'+
1040: ' <'+'input type="button" name="button"'+
1.100 harris41 1041: ' value="abort search and view current results" '+
1.102 harris41 1042: ' onClick="javascript:opener.abortsearch()" />'+
1.98 harris41 1043: ' <'+'input type="button" name="button"'+
1.100 harris41 1044: ' value="help" onClick="javascript:opener.openhelp()" />'+
1.98 harris41 1045: '<'+'/tt>'+
1046: '<'+'/form>'+
1047: '<'+'/body><'+'/html>');
1.92 harris41 1048: popwin.document.close();
1049: </script>
1050: ENDPOP
1051: $r->rflush();
1.44 harris41 1052:
1.93 harris41 1053: my $servercount=0;
1.98 harris41 1054: my $hitcountsum=0;
1.102 harris41 1055: my $bloop=$servernum;
1056: my %orkey;
1057: BLOOP: while(1) {
1058: my $sn=0;
1059: last BLOOP unless $bloop;
1.107 harris41 1060: last BLOOP unless $timeremain;
1.102 harris41 1061: RLOOP: foreach my $rkey (sort keys %rhash) {
1.98 harris41 1062: $sn++;
1.102 harris41 1063: next RLOOP if $orkey{$rkey};
1.93 harris41 1064: $servercount++;
1065: $tflag=1;
1066: $compiledresult='';
1067: my $hostname=$rkey;
1.92 harris41 1068: my $reply=$rhash{$rkey};
1.18 harris41 1069: my @results;
1.92 harris41 1070:
1.18 harris41 1071: my $replyfile='';
1.93 harris41 1072:
1073: if ($reply eq 'con_lost') {
1.100 harris41 1074: $r->print('<script type="text/javascript">popwin.document.img'.
1075: $sn.'.'.
1.99 harris41 1076: 'src="/adm/lonIcons/srvbad.gif";</script>'.
1077: "\n");
1078: $r->rflush();
1.102 harris41 1079: $bloop--;
1080: $orkey{$rkey}=1;
1.93 harris41 1081: }
1082: else {
1083: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
1084: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1085: $reply=~/(.*?)\_/;
1086: {
1.98 harris41 1087: my $temp=0;
1088: WLOOP: while (1) {
1089: if (-e $replyfile && $tflag) {
1.100 harris41 1090: $r->print('<script type="text/javascript">'.
1091: 'popwin.document.img'.$sn.'.'.
1.99 harris41 1092: 'src="/adm/lonIcons/srvhalf.gif";</script>'.
1.98 harris41 1093: "\n");
1094: $r->rflush();
1.100 harris41 1095: $r->print('<script type="text/javascript">'.
1096: 'popwin.hc["'.$rkey.'"]='.
1.99 harris41 1097: '"still transferring..."'.';</script>'.
1.98 harris41 1098: "\n");
1099: $r->rflush();
1100: $tflag=0;
1101: }
1102: if (-e "$replyfile.end") {
1.102 harris41 1103: $bloop--;
1104: $orkey{$rkey}=1;
1.98 harris41 1105: if (-s $replyfile) {
1.100 harris41 1106: $r->print('<script type="text/javascript">'.
1107: 'popwin.document.img'.$sn.'.'.
1108: 'src="/adm/lonIcons/srvgood.gif";'.
1109: '</script>'."\n");
1.98 harris41 1110: $r->rflush();
1111: my $fh=Apache::File->new($replyfile) or
1112: ($r->print('ERROR: file '.
1113: $replyfile.' cannot be opened') and
1114: return OK);
1115: @results=<$fh> if $fh;
1116: $hitcount{$rkey}=@results+0;
1.100 harris41 1117: $r->print('<script type="text/javascript">'.
1118: 'popwin.hc["'.$rkey.'"]='.
1.98 harris41 1119: $hitcount{$rkey}.';</script>'.
1120: "\n");
1121: $r->rflush();
1122: $hitcountsum+=$hitcount{$rkey};
1.100 harris41 1123: $r->print('<script type="text/javascript">'.
1124: 'popwin.document.forms.popremain.'.
1.98 harris41 1125: 'numhits.value='.$hitcountsum.
1126: ';</script>'.
1127: "\n");
1128: $r->rflush();
1129: }
1.99 harris41 1130: else {
1.100 harris41 1131: $r->print('<script type="text/javascript">'.
1132: 'popwin.document.img'.$sn.'.'.
1133: 'src="/adm/lonIcons/srvempty.gif";'.
1134: '</script>'.
1135: "\n");
1.99 harris41 1136: $r->rflush();
1.100 harris41 1137: $r->print('<script type="text/javascript">'.
1138: 'popwin.hc["'.$rkey.'"]=0'.
1.99 harris41 1139: ';</script>'.
1140: "\n");
1141: $r->rflush();
1142: }
1.107 harris41 1143: last WLOOP;
1144: }
1145: if ($temp>1) {
1146: sleep 1;
1147: $timeremain--;
1148: $elapsetime++;
1.98 harris41 1149: last WLOOP;
1150: }
1151: last WLOOP unless $timeremain;
1152: sleep 1;
1153: $timeremain--;
1154: $elapsetime++;
1.100 harris41 1155: $r->print('<script type="text/javascript">'.
1156: 'popwin.document.popremain.elapsetime.'.
1.98 harris41 1157: 'value="'.$elapsetime.'";</script>'."\n");
1158: $r->rflush();
1159: $temp++;
1160: }
1.93 harris41 1161: }
1.100 harris41 1162: $r->print('<script type="text/javascript">'.
1163: 'popwin.document.whirly.'.
1164: 'src="'.'/adm/lonIcons/lonanimend.gif'.
1165: '";</script>'."\n");
1166: $r->rflush();
1.6 harris41 1167: }
1.77 harris41 1168: my $customshow='';
1169: my $extrashow='';
1.87 harris41 1170: my @customfields;
1.77 harris41 1171: if ($ENV{'form.customshow'}) {
1172: $customshow=$ENV{'form.customshow'};
1173: $customshow=~s/[^\w\s]//g;
1.87 harris41 1174: my @fields=map {"<font color=\"#008000\">$_:</font><!-- $_ -->"}
1.93 harris41 1175: split(/\s+/,$customshow);
1.88 harris41 1176: @customfields=split(/\s+/,$customshow);
1.81 harris41 1177: if ($customshow) {
1178: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1179: }
1.77 harris41 1180: }
1.79 harris41 1181: my $customdata='';
1.87 harris41 1182: my %customhash;
1.79 harris41 1183: foreach my $result (@results) {
1.82 harris41 1184: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1.87 harris41 1185: my $tmp=$result;
1186: $tmp=~s/^custom\=//;
1187: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1188: } split(/\,/,$tmp);
1189: $customhash{$k}=$v;
1.82 harris41 1190: }
1.79 harris41 1191: }
1.101 harris41 1192: if (keys %hash) {
1193: untie %hash;
1194: }
1195: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1196: if ($ENV{'form.launch'} eq '1') {
1197: &start_fresh_session();
1198: }
1199: foreach my $result (@results) {
1200: next if $result=~/^custom\=/;
1201: chomp $result;
1202: next unless $result;
1203: my @fields=map
1204: {&Apache::lonnet::unescape($_)}
1205: (split(/\,/,$result));
1206: my ($title,$author,$subject,$url,$keywords,$version,
1207: $notes,$abstract,$mime,$lang,
1208: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1.102 harris41 1209:
1210: unless ($ENV{'user.adv'}) {
1211: $keywords='<i>- not displayed -</i>';
1212: $fields[4]=$keywords;
1213: $notes='<i>- not displayed -</i>';
1214: $fields[6]=$notes;
1215: $abstract='<i>- not displayed -</i>';
1216: $fields[7]=$abstract;
1217: $subject='<i>- not displayed -</i>';
1218: $fields[2]=$subject;
1219: }
1220:
1.101 harris41 1221: my $shortabstract=$abstract;
1.102 harris41 1222: $shortabstract=substr($abstract,0,200).'...' if length($abstract)>200;
1.101 harris41 1223: $fields[7]=$shortabstract;
1.102 harris41 1224: my $shortkeywords=$keywords;
1225: $shortkeywords=substr($keywords,0,200).'...' if length($keywords)>200;
1226: $fields[4]=$shortkeywords;
1227:
1.101 harris41 1228: my $extrashow2=$extrashow;
1229: if ($extrashow) {
1230: foreach my $field (@customfields) {
1231: my $value='';
1232: if ($customhash{$url}=~/\<${field}[^\>]*\>(.*?)\<\/${field}[^\>]*\>/s) {
1233: $value=$1;
1234: }
1235: $extrashow2=~s/\<\!\-\- $field \-\-\>/ $value/g;
1236: }
1237: }
1.93 harris41 1238:
1.101 harris41 1239: $compiledresult.=<<END if $compiledresult or $servercount!=$servernum;
1.89 harris41 1240: <hr align='left' width='200' noshade />
1241: END
1.101 harris41 1242: $compiledresult.=<<END;
1.56 harris41 1243: <p>
1.8 harris41 1244: END
1.101 harris41 1245: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
1.8 harris41 1246: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1.10 harris41 1247: onClick="javascript:select_data('$title','$url')">
1.8 harris41 1248: </font>
1.98 harris41 1249: <br />
1250: END
1.101 harris41 1251: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1252: $fnum+=0;
1253: $hash{"pre_${fnum}_link"}=$url;
1254: $hash{"pre_${fnum}_title"}=$title;
1255: $compiledresult.=<<END;
1.98 harris41 1256: <font size='-1'><input type="checkbox" name="returnvalues" value="SELECT"
1257: onClick="javascript:queue($fnum)" />
1258: </font>
1259: <br />
1.8 harris41 1260: END
1.101 harris41 1261: # <input type="hidden" name="title$fnum" value="$title" />
1262: # <input type="hidden" name="url$fnum" value="$url" />
1263: $fnum++;
1264: }
1265: my $httphost=$ENV{'HTTP_HOST'};
1266:
1267: my $viewselect;
1268: if ($mode eq 'Basic') {
1269: $viewselect=$ENV{'form.basicviewselect'};
1270: }
1271: elsif ($mode eq 'Advanced') {
1272: $viewselect=$ENV{'form.advancedviewselect'};
1273: }
1.55 harris41 1274:
1.101 harris41 1275: if ($viewselect eq 'Detailed Citation View') {
1276: $compiledresult.=&detailed_citation_view(@fields,
1.93 harris41 1277: $hostname,$httphost,
1278: $extrashow2);
1.101 harris41 1279: }
1280: elsif ($viewselect eq 'Summary View') {
1281: $compiledresult.=&summary_view(@fields,$hostname,$httphost,
1.93 harris41 1282: $extrashow2);
1.101 harris41 1283: }
1284: elsif ($viewselect eq 'Fielded Format') {
1285: $compiledresult.=&fielded_format_view(@fields,$hostname,
1.93 harris41 1286: $httphost,$extrashow2);
1.101 harris41 1287: }
1288: elsif ($viewselect eq 'XML/SGML') {
1289: $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,
1.93 harris41 1290: $extrashow2);
1.101 harris41 1291: }
1.93 harris41 1292:
1.101 harris41 1293: }
1294:
1295: untie %hash;
1.18 harris41 1296: }
1.101 harris41 1297: else {
1298: $r->print('<html><head></head><body>Unable to tie hash to db '.
1299: 'file</body></html>');
1300: }
1.93 harris41 1301: if ($compiledresult) {
1302: $resultflag=1;
1.18 harris41 1303: }
1.6 harris41 1304:
1.43 harris41 1305: $r->print(<<RESULTS);
1.93 harris41 1306: $compiledresult
1.43 harris41 1307: RESULTS
1.93 harris41 1308: my $percent=sprintf('%3.0f',($servercount/$servernum*100));
1.44 harris41 1309: }
1.102 harris41 1310: }
1.93 harris41 1311: unless ($resultflag) {
1312: $r->print("\nThere were no results that matched your query\n");
1.43 harris41 1313: }
1.100 harris41 1314: # $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush();
1.93 harris41 1315: $r->print(<<RESULTS);
1.6 harris41 1316: </body>
1317: </html>
1318: RESULTS
1.41 harris41 1319: }
1320:
1.50 harris41 1321: # ------------------------------------------------------ Detailed Citation View
1322: sub detailed_citation_view {
1323: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1324: $notes,$shortabstract,$mime,$lang,
1325: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1326: $hostname,$httphost,$extrashow)=@_;
1.50 harris41 1327: my $result=<<END;
1.56 harris41 1328: <i>$owner</i>, last revised $lastrevisiondate
1329: <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
1330: <h3>$author</h3>
1331: </p>
1332: <p>
1.98 harris41 1333: <b>Subject:</b> $subject<br />
1334: <b>Keyword(s):</b> $keywords<br />
1335: <b>Notes:</b> $notes<br />
1336: <b>MIME Type:</b> $mimetag{$mime}<br />
1337: <b>Language:</b> $language{$lang}<br />
1338: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
1.78 harris41 1339: </p>
1.77 harris41 1340: $extrashow
1.78 harris41 1341: <p>
1.56 harris41 1342: $shortabstract
1.50 harris41 1343: </p>
1344: END
1345: return $result;
1346: }
1347:
1348: # ---------------------------------------------------------------- Summary View
1349: sub summary_view {
1350: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1351: $notes,$shortabstract,$mime,$lang,
1352: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1353: $hostname,$httphost,$extrashow)=@_;
1.50 harris41 1354: my $result=<<END;
1.56 harris41 1355: <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
1356: $title<br />
1357: $owner -- $lastrevisiondate<br />
1358: $cprtag{$copyright}<br />
1.77 harris41 1359: $extrashow
1.50 harris41 1360: </p>
1361: END
1362: return $result;
1363: }
1364:
1365: # -------------------------------------------------------------- Fielded Format
1366: sub fielded_format_view {
1367: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1368: $notes,$shortabstract,$mime,$lang,
1369: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1370: $hostname,$httphost,$extrashow)=@_;
1.50 harris41 1371: my $result=<<END;
1.51 harris41 1372: <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
1.56 harris41 1373: <br />
1374: <b>Title:</b> $title<br />
1375: <b>Author(s):</b> $author<br />
1376: <b>Subject:</b> $subject<br />
1377: <b>Keyword(s):</b> $keywords<br />
1378: <b>Notes:</b> $notes<br />
1379: <b>MIME Type:</b> $mimetag{$mime}<br />
1380: <b>Language:</b> $language{$lang}<br />
1381: <b>Creation Date:</b> $creationdate<br />
1382: <b>Last Revision Date:</b> $lastrevisiondate<br />
1383: <b>Publisher/Owner:</b> $owner<br />
1384: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
1385: <b>Repository Location:</b> $hostname<br />
1386: <b>Abstract:</b> $shortabstract<br />
1.77 harris41 1387: $extrashow
1.50 harris41 1388: </p>
1389: END
1390: return $result;
1391: }
1392:
1393: # -------------------------------------------------------------------- XML/SGML
1394: sub xml_sgml_view {
1395: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1396: $notes,$shortabstract,$mime,$lang,
1397: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1398: $hostname,$httphost,$extrashow)=@_;
1.50 harris41 1399: my $result=<<END;
1.56 harris41 1400: <pre>
1401: <LonCapaResource>
1.57 harris41 1402: <url>$url</url>
1.56 harris41 1403: <title>$title</title>
1404: <author>$author</author>
1405: <subject>$subject</subject>
1406: <keywords>$keywords</keywords>
1407: <notes>$notes</notes>
1408: <mimeInfo>
1409: <mime>$mime</mime>
1410: <mimetag>$mimetag{$mime}</mimetag>
1411: </mimeInfo>
1412: <languageInfo>
1413: <language>$lang</language>
1414: <languagetag>$language{$lang}</languagetag>
1415: </languageInfo>
1416: <creationdate>$creationdate</creationdate>
1417: <lastrevisiondate>$lastrevisiondate</lastrevisiondate>
1418: <owner>$owner</owner>
1419: <copyrightInfo>
1420: <copyright>$copyright</copyright>
1421: <copyrighttag>$cprtag{$copyright}</copyrighttag>
1422: </copyrightInfo>
1423: <repositoryLocation>$hostname</repositoryLocation>
1424: <shortabstract>$shortabstract</shortabstract>
1.57 harris41 1425: </LonCapaResource>
1.56 harris41 1426: </pre>
1.77 harris41 1427: $extrashow
1.50 harris41 1428: END
1429: return $result;
1.60 harris41 1430: }
1431:
1.98 harris41 1432: # ---------------------------------------------------- see if a field is filled
1433: sub filled {
1434: my ($field)=@_;
1435: if ($field=~/\S/ && $field ne 'any') {
1436: return 1;
1.61 harris41 1437: }
1.98 harris41 1438: else {
1439: return 0;
1.61 harris41 1440: }
1.60 harris41 1441: }
1442:
1.98 harris41 1443: # ---------------- Message to output when there are not enough fields filled in
1444: sub output_blank_field_error {
1445: my ($r)=@_;
1446: # make query information persistent to allow for subsequent revision
1447: my $persistent=&make_persistent();
1448:
1449: $r->print(<<BEGINNING);
1450: <html>
1451: <head>
1452: <title>The LearningOnline Network with CAPA</title>
1453: BEGINNING
1454: $r->print(<<RESULTS);
1455: </head>
1456: <body bgcolor="#ffffff">
1457: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1458: <h1>Search Catalog</h1>
1459: <form method="post" action="/adm/searchcat">
1460: $persistent
1461: <input type='button' value='Revise search request'
1462: onClick='this.form.submit();' />
1463: $closebutton
1464: <hr />
1465: <h3>Helpful Message</h3>
1466: <p>
1467: Incorrect search query due to blank entry fields.
1468: You need to fill in the relevant
1469: fields on the search page in order for a query to be
1470: processed.
1471: </p>
1472: </body>
1473: </html>
1474: RESULTS
1475: }
1476:
1477: # ----------------------------------------------------------- Output date error
1.60 harris41 1478: sub output_date_error {
1479: my ($r,$message)=@_;
1480: # make query information persistent to allow for subsequent revision
1.65 harris41 1481: my $persistent=&make_persistent();
1.60 harris41 1482:
1483: $r->print(<<BEGINNING);
1484: <html>
1485: <head>
1486: <title>The LearningOnline Network with CAPA</title>
1487: BEGINNING
1488: $r->print(<<RESULTS);
1489: </head>
1490: <body bgcolor="#ffffff">
1.98 harris41 1491: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1.60 harris41 1492: <h1>Search Catalog</h1>
1493: <form method="post" action="/adm/searchcat">
1494: $persistent
1495: <input type='button' value='Revise search request'
1.98 harris41 1496: onClick='this.form.submit();' />
1.60 harris41 1497: $closebutton
1.98 harris41 1498: <hr />
1.60 harris41 1499: <h3>Helpful Message</h3>
1500: <p>
1501: $message
1502: </p>
1503: </body>
1504: </html>
1505: RESULTS
1.101 harris41 1506: }
1507:
1.104 harris41 1508: # --------- settings whenever the user causes the search window to be launched
1.101 harris41 1509: sub start_fresh_session {
1510: delete $hash{'mode_catalog'};
1.109 harris41 1511: foreach (keys %hash) {
1.101 harris41 1512: if ($_ =~ /^pre_/) {
1513: delete $hash{$_};
1514: }
1515: if ($_ =~ /^store/) {
1516: delete $hash{$_};
1517: }
1.109 harris41 1518: }
1.3 harris41 1519: }
1.1 www 1520:
1521: 1;
1.98 harris41 1522:
1.1 www 1523: __END__
1.105 harris41 1524:
1525: =head1 NAME
1526:
1527: Apache::lonsearchcat - mod_perl module for handling a searchable catalog
1528:
1529: =head1 SYNOPSIS
1530:
1531: Invoked by /etc/httpd/conf/srm.conf:
1532:
1533: <Location /adm/searchcat>
1534: PerlAccessHandler Apache::lonacc
1535: SetHandler perl-script
1536: PerlHandler Apache::lonsearchcat
1537: ErrorDocument 403 /adm/login
1538: ErrorDocument 500 /adm/errorhandler
1539: </Location>
1540:
1541: =head1 INTRODUCTION
1542:
1543: This module enables searching for a distributed browseable catalog.
1544:
1545: This is part of the LearningOnline Network with CAPA project
1546: described at http://www.lon-capa.org.
1547:
1548: =head1 BEGIN SUBROUTINE
1549:
1550: This routine is only run once after compilation.
1551:
1552: =over 4
1553:
1554: =item *
1555:
1556: Initializes %language hash table.
1557:
1558: =item *
1559:
1560: Initializes %cprtag hash table (for copyright.tab).
1561:
1562: =item *
1563:
1564: Initializes %mimetag hash table (for filetypes.tab).
1565:
1566: =item *
1567:
1568: Initializes %hostdomains and hostips hash table (for hosts.tab).
1569:
1570: =back
1571:
1572: =head1 HANDLER SUBROUTINE
1573:
1574: This routine is called by Apache and mod_perl.
1575:
1576: =over 4
1577:
1578: =item *
1579:
1580: configure dynamic components of interface
1581:
1582: =item *
1583:
1584: determine current user
1585:
1586: =item *
1587:
1588: see if a search invocation should be done
1589:
1590: =item *
1591:
1592: else, begin building search interface to output
1593:
1594: =item *
1595:
1596: compute date selection boxes
1597:
1598: =item *
1599:
1600: compute customized metadata field
1601:
1602: =item *
1603:
1604: print screen
1605:
1606: =back
1607:
1608: =head1 OTHER SUBROUTINES
1609:
1610: =over 4
1611:
1612: =item *
1613:
1614: get_unprocessed_cgi() : reads in critical name/value pairs that may have not
1615: been processed and passed into %ENV by the web server
1616:
1617: =item *
1618:
1619: make_persistent() : makes a set of hidden HTML fields to make
1620: SQL search interface information to be persistent
1621:
1622: =back
1623:
1624: WEB INTERFACE COMPONENT FUNCTIONS
1625:
1626: =over 4
1627:
1628: =item *
1629:
1630: simpletextfield(name,value) : returns HTML formatted string for simple text
1631: field
1632:
1633: =item *
1634:
1635: simplecheckbox(name,value) : returns HTML formatted string for simple
1636: checkbox
1637:
1638: =item *
1639:
1640: searchphrasefield(title,name,value) : returns HTML formatted string for
1641: a search expression phrase field
1642:
1643: =item *
1644:
1645: dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
1646: formatted string for a calendar date
1647:
1648: =item *
1649:
1650: selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
1651: a selection box field
1652:
1653: =back
1654:
1655: SEARCH FUNCTIONS
1656:
1657: =over 4
1658:
1659: =item *
1660:
1661: advancedsearch(server reference, environment reference) : perform a complex
1662: multi-field logical query
1663:
1664: =item *
1665:
1666: basicsearch(server reference, environment reference) : perform a simple
1667: single-field logical query
1668:
1669: =item *
1670:
1671: build_SQL_query(field name, logic) : builds a SQL query string from a
1672: logical expression with AND/OR keywords
1673:
1674: =item *
1675:
1676: build_custommetadata_query(field_name, logic_statement) : builds a perl
1677: regular expression from a logical expression with AND/OR keywords
1678:
1679: =item *
1680:
1681: recursive_SQL_query_build(field name, reverse notation expression) :
1682: builds a SQL query string from a reverse notation expression
1683: logical expression with AND/OR keywords
1684:
1685: =item *
1686:
1687: build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2,
1688: lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) :
1689: Builds a SQL logic query to check time/date entries.
1690:
1691: =back
1692:
1693: OUTPUTTING RESULTS FUNCTION
1694:
1695: =over 4
1696:
1697: =item *
1698:
1699: output_results(output mode, server reference, environment reference,
1700: reply list reference) : outputs results from search
1701:
1702: =back
1703:
1704: DIFFERENT WAYS TO VIEW METADATA RECORDS
1705:
1706: =over 4
1707:
1708: =item *
1709:
1710: detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1711: see metadata viewing notes below
1712:
1713: =item *
1714:
1715: summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1716: see metadata viewing notes below
1717:
1718: =item *
1719:
1720: fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1721: see metadata viewing notes below
1722:
1723: =item *
1724:
1725: xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1726: see metadata viewing notes below
1727:
1728: =back
1729:
1730: _____________________________________________________________________
1731: | * Metadata viewing notes |
1732: | Output is a HTML-ified string. |
1733: | Input arguments are title, author, subject, url, keywords, version, |
1734: | notes, short abstract, mime, language, creation date, |
1735: | last revision date, owner, copyright, hostname, httphost, and |
1736: | extra custom metadata to show. |
1737: ---------------------------------------------------------------------
1738:
1739: TEST CONDITIONAL FUNCTIONS
1740:
1741: =over 4
1742:
1743: =item *
1744:
1745: filled(field) : determines whether a given field has been filled
1746:
1747: =back
1748:
1749: ERROR FUNCTIONS
1750:
1751: =over 4
1752:
1753: =item *
1754:
1755: output_blank_field_error(server reference) : outputs a message saying that
1756: more fields need to be filled in
1757:
1758: =item *
1759:
1760: output_date_error(server reference, error message) : outputs
1761: an error message specific to bad date format.
1762:
1763: =back
1764:
1765: =cut
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