Annotation of loncom/interface/lonsearchcat.pm, revision 1.116
1.98 harris41 1: # The LearningOnline Network with CAPA
1.108 harris41 2: # Search Catalog
3: #
1.116 ! matthew 4: # $Id: lonsearchcat.pm,v 1.115 2002/01/17 13:53:45 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
1.113 harris41 31: # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison
1.115 harris41 32: # YEAR=2002
33: # 1/17 Scott Harrison
1.104 harris41 34: #
35: ###
36:
1.98 harris41 37: ###############################################################################
38: ## ##
39: ## ORGANIZATION OF THIS PERL MODULE ##
40: ## ##
1.105 harris41 41: ## 1. Modules used by this module ##
42: ## 2. Choices for different output views (detailed, summary, xml, etc) ##
43: ## 3. BEGIN block (to be run once after compilation) ##
44: ## 4. Handling routine called via Apache and mod_perl ##
45: ## 5. Other subroutines ##
1.98 harris41 46: ## ##
47: ###############################################################################
48:
1.1 www 49: package Apache::lonsearchcat;
50:
1.98 harris41 51: # ------------------------------------------------- modules used by this module
1.1 www 52: use strict;
53: use Apache::Constants qw(:common);
1.6 harris41 54: use Apache::lonnet();
55: use Apache::File();
1.7 harris41 56: use CGI qw(:standard);
1.41 harris41 57: use Text::Query;
1.101 harris41 58: use GDBM_File;
1.112 harris41 59: use Apache::loncommon();
1.1 www 60:
1.90 harris41 61: # ---------------------------------------- variables used throughout the module
62:
1.98 harris41 63: # -- information holders
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
1.114 harris41 100: BEGIN {
1.98 harris41 101: {
102: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
103: '/hosts.tab');
1.109 harris41 104: while (<$fh>) {
1.98 harris41 105: $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp;
106: if ($3 eq 'library') {
107: $hostdomains{$1}=$2;
108: $hostips{$1}=$4;
109: }
1.109 harris41 110: }
1.98 harris41 111: }
112: }
113:
1.101 harris41 114: my $diropendb = "";
115: my $domain = "";
116:
1.98 harris41 117: # ----------------------------- Handling routine called via Apache and mod_perl
118: sub handler {
119: my $r = shift;
1.103 harris41 120: untie %hash;
1.98 harris41 121:
122: $r->content_type('text/html');
123: $r->send_http_header;
124: return OK if $r->header_only;
125:
1.101 harris41 126: $domain = $r->dir_config('lonDefDomain');
1.116 ! matthew 127: $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
1.101 harris41 128:
1.116 ! matthew 129: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
! 130: ['catalogmode','launch','acts']);
1.101 harris41 131:
132: if ($ENV{'form.launch'} eq '1') {
133: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
134: &start_fresh_session();
135: untie %hash;
136: }
137: else {
138: $r->print('<html><head></head><body>Unable to tie hash to db '.
139: 'file</body></html>');
140: return OK;
141: }
142: }
143:
1.98 harris41 144: # ----------------------------------- configure dynamic components of interface
145: my $hidden='';
146: if ($ENV{'form.catalogmode'} eq 'interactive') {
147: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
148: "\n";
149: $closebutton="<input type='button' name='close' value='CLOSE' ".
150: "onClick='self.close()'>"."\n";
151: }
152: elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
153: $hidden=<<END;
154: <input type='hidden' name='catalogmode' value='groupsearch'>
155: END
156: $closebutton=<<END;
157: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
158: END
159: $importbutton=<<END;
160: <input type='button' name='import' value='IMPORT'
161: onClick='javascript:select_group()'>
162: END
163: }
164:
165: # ------------------------------------------------------ Determine current user
166: $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
167:
168: # --- Now, depending on the interface actions, do one of three things here:
169: # --- 1. a basic search
170: # --- 2. an advanced search
171: # --- 3. output a search interface
1.3 harris41 172:
1.90 harris41 173: # ----------------------------------- See if a search invocation should be done
1.6 harris41 174: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
1.101 harris41 175: untie %hash; return &basicsearch($r,\%ENV);
1.6 harris41 176: }
1.18 harris41 177: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
1.101 harris41 178: untie %hash; return &advancedsearch($r,\%ENV);
1.18 harris41 179: }
1.6 harris41 180:
1.90 harris41 181: # ----------------------------- Else, begin building search interface to output
1.8 harris41 182: $scrout=''; # building a part of screen output
1.3 harris41 183: $scrout.=&searchphrasefield('Limit by title','title',
1.11 harris41 184: $ENV{'form.title'});
1.3 harris41 185:
186: $scrout.=&searchphrasefield('Limit by author','author',
1.11 harris41 187: $ENV{'form.author'});
1.3 harris41 188:
189: $scrout.=&searchphrasefield('Limit by subject','subject',
1.11 harris41 190: $ENV{'form.subject'});
191:
192: $scrout.=&searchphrasefield('Limit by keywords','keywords',
193: $ENV{'form.keywords'});
194:
195: $scrout.=&searchphrasefield('Limit by URL','url',
196: $ENV{'form.url'});
197:
1.96 harris41 198: # $scrout.=&searchphrasefield('Limit by version','version',
199: # $ENV{'form.version'});
1.3 harris41 200:
201: $scrout.=&searchphrasefield('Limit by notes','notes',
1.11 harris41 202: $ENV{'form.notes'});
1.3 harris41 203:
204: $scrout.=&searchphrasefield('Limit by abstract','abstract',
1.11 harris41 205: $ENV{'form.abstract'});
1.3 harris41 206:
1.110 harris41 207: $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});
1.3 harris41 208: $scrout.=&selectbox('Limit by MIME type','mime',
1.111 harris41 209: $ENV{'form.mime'},
210: 'any','Any type',
211: \&{Apache::loncommon::filedescriptionex},
212: (&Apache::loncommon::fileextensions));
1.11 harris41 213:
214: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
1.3 harris41 215:
216: $scrout.=&selectbox('Limit by language','language',
1.111 harris41 217: $ENV{'form.language'},'any','Any Language',
218: \&{Apache::loncommon::languagedescription},
219: (&Apache::loncommon::languageids),
220: );
1.8 harris41 221:
222: # ------------------------------------------------ Compute date selection boxes
223: $scrout.=<<CREATIONDATESTART;
1.3 harris41 224: <p>
225: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
226: </font>
1.98 harris41 227: <br />
1.8 harris41 228: between:
229: CREATIONDATESTART
1.11 harris41 230: $scrout.=&dateboxes('creationdatestart',1,1,1976,
231: $ENV{'form.creationdatestart_month'},
232: $ENV{'form.creationdatestart_day'},
233: $ENV{'form.creationdatestart_year'},
234: );
1.8 harris41 235: $scrout.=<<CREATIONDATEEND;
236: and:
237: CREATIONDATEEND
1.11 harris41 238: $scrout.=&dateboxes('creationdateend',12,31,2051,
239: $ENV{'form.creationdateend_month'},
240: $ENV{'form.creationdateend_day'},
241: $ENV{'form.creationdateend_year'},
242: );
1.8 harris41 243: $scrout.="</p>";
244:
245: $scrout.=<<LASTREVISIONDATESTART;
246: <p>
247: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
248: </b></font>
1.98 harris41 249: <br />between:
1.8 harris41 250: LASTREVISIONDATESTART
1.11 harris41 251: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
252: $ENV{'form.lastrevisiondatestart_month'},
253: $ENV{'form.lastrevisiondatestart_day'},
254: $ENV{'form.lastrevisiondatestart_year'},
255: );
1.8 harris41 256: $scrout.=<<LASTREVISIONDATEEND;
257: and:
258: LASTREVISIONDATEEND
1.11 harris41 259: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
260: $ENV{'form.lastrevisiondateend_month'},
261: $ENV{'form.lastrevisiondateend_day'},
262: $ENV{'form.lastrevisiondateend_year'},
263: );
1.8 harris41 264: $scrout.='</p>';
265:
266: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
1.11 harris41 267: $ENV{'form.owner'});
1.8 harris41 268:
1.11 harris41 269: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
1.8 harris41 270: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
1.111 harris41 271: $ENV{'form.copyright'},
272: 'any','Any copyright/distribution',
273: \&{Apache::loncommon::copyrightdescription},
274: (&Apache::loncommon::copyrightids),
275: );
1.8 harris41 276:
1.14 harris41 277: # ------------------------------------------- Compute customized metadata field
278: $scrout.=<<CUSTOMMETADATA;
279: <p>
1.77 harris41 280: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
1.14 harris41 281: </font>
1.77 harris41 282: For resource-specific metadata, enter in an expression in the form of
1.100 harris41 283: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
1.14 harris41 284: <b>Example:</b> grandmother=75 OR grandfather=85
1.98 harris41 285: <br />
1.14 harris41 286: CUSTOMMETADATA
287: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
1.15 harris41 288: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
1.14 harris41 289:
1.77 harris41 290: $scrout.=<<CUSTOMSHOW;
291: <p>
292: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
293: </font>
294: Enter in a space-separated list of special metadata fields to show
295: in a fielded listing for each record result.
1.98 harris41 296: <br />
1.77 harris41 297: CUSTOMSHOW
298: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
299: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
300:
1.8 harris41 301: # ---------------------------------------------------------------- Print screen
302: $r->print(<<ENDDOCUMENT);
303: <html>
304: <head>
305: <title>The LearningOnline Network with CAPA</title>
1.100 harris41 306: <script type="text/javascript">
307: function openhelp(val) {
308: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
1.116 ! matthew 309: 'scrollbars=1,width=600,height=300');
1.100 harris41 310: openhelpwin.focus();
311: }
312: </script>
1.8 harris41 313: </head>
314: <body bgcolor="#FFFFFF">
1.98 harris41 315: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1.8 harris41 316: <h1>Search Catalog</h1>
317: <form method="post" action="/adm/searchcat">
318: $hidden
1.98 harris41 319: <hr />
1.8 harris41 320: <h3>Basic Search</h3>
321: <p>
322: Enter terms or phrases separated by search operators
1.100 harris41 323: such as AND, OR, or NOT then press SEARCH below. Terms should be specific
1.8 harris41 324: to the title, author, subject, notes, or abstract information associated
325: with a resource.
1.98 harris41 326: <br />
1.11 harris41 327: ENDDOCUMENT
328: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
329: $r->print(' ');
330: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
331: $r->print('<font color="#800000">Title only</font> ');
1.96 harris41 332: # $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
333: # <font color="#800000">Search historic archives</font>
1.11 harris41 334: $r->print(<<ENDDOCUMENT);
1.98 harris41 335: <br />
1.68 harris41 336: <input type="submit" name="basicsubmit" value='SEARCH' />
337: <input type="reset" name="reset" value='RESET' />
1.46 harris41 338: $closebutton
1.55 harris41 339: $basicviewselect
1.100 harris41 340: <input type="button" value="HELP" onClick="openhelp()" />
1.8 harris41 341: </p>
1.98 harris41 342: <hr />
1.8 harris41 343: <h3>Advanced Search</h3>
344: $scrout
345: <p>
1.68 harris41 346: <input type="submit" name="advancedsubmit" value='SEARCH' />
347: <input type="reset" name="reset" value='RESET' />
1.46 harris41 348: $closebutton
1.55 harris41 349: $advancedviewselect
1.100 harris41 350: <input type="button" value="HELP" onClick="openhelp()" />
1.3 harris41 351: </p>
1.8 harris41 352: </form>
353: </body>
354: </html>
355: ENDDOCUMENT
356: return OK;
357: }
358:
1.98 harris41 359: # ------------------------------------------------------------- make persistent
360: sub make_persistent {
361: my $persistent='';
362:
1.109 harris41 363: foreach (keys %ENV) {
1.98 harris41 364: if (/^form\./ && !/submit/) {
365: my $name=$_;
366: my $key=$name;
367: $ENV{$key}=~s/\'//g; # do not mess with html field syntax
368: $name=~s/^form\.//;
369: $persistent.=<<END;
370: <input type='hidden' name='$name' value='$ENV{$key}' />
371: END
372: }
1.109 harris41 373: }
1.98 harris41 374: return $persistent;
375: }
376:
1.8 harris41 377: # --------------------------------------------------------- Various form fields
378:
1.11 harris41 379: sub simpletextfield {
380: my ($name,$value)=@_;
1.68 harris41 381: return '<input type=text name=\''.$name.
382: '\' size=20 value=\''.$value.'\' />';
1.11 harris41 383: }
384:
385: sub simplecheckbox {
386: my ($name,$value)=@_;
387: my $checked='';
388: $checked="CHECKED" if $value eq 'on';
1.68 harris41 389: return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
1.11 harris41 390: }
391:
1.8 harris41 392: sub searchphrasefield {
393: my ($title,$name,$value)=@_;
394: my $instruction=<<END;
395: Enter terms or phrases separated by search operators such
1.100 harris41 396: as AND, OR, or NOT.
1.8 harris41 397: END
398: my $uctitle=uc($title);
399: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
1.98 harris41 400: "</FONT> $instruction<br />".
1.68 harris41 401: '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
1.8 harris41 402: }
1.3 harris41 403:
1.8 harris41 404: sub dateboxes {
1.11 harris41 405: my ($name,$defaultmonth,$defaultday,$defaultyear,
406: $currentmonth,$currentday,$currentyear)=@_;
407: ($defaultmonth,$defaultday,$defaultyear)=('','','');
408: my $month=<<END;
1.8 harris41 409: <select name="${name}_month">
1.11 harris41 410: <option value='$defaultmonth'> </option>
411: <option value="1">January</option>
412: <option value="2">February</option>
413: <option value="3">March</option>
414: <option value="4">April</option>
415: <option value="5">May</option>
416: <option value="6">June</option>
417: <option value="7">July</option>
418: <option value="8">August</option>
419: <option value="9">September</option>
1.3 harris41 420: <option value="10">October</option>
421: <option value="11">November</option>
422: <option value="12">December</option>
423: </select>
1.11 harris41 424: END
425: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
426: my $day=<<END;
1.8 harris41 427: <select name="${name}_day">
1.11 harris41 428: <option value='$defaultday'> </option>
429: <option value="1">1</option>
430: <option value="2">2</option>
431: <option value="3">3</option>
432: <option value="4">4</option>
433: <option value="5">5</option>
434: <option value="6">6</option>
435: <option value="7">7</option>
436: <option value="8">8</option>
437: <option value="9">9</option>
438: <option value="10">10</option>
439: <option value="11">11</option>
440: <option value="12">12</option>
441: <option value="13">13</option>
442: <option value="14">14</option>
443: <option value="15">15</option>
444: <option value="16">16</option>
445: <option value="17">17</option>
446: <option value="18">18</option>
447: <option value="19">19</option>
448: <option value="20">20</option>
449: <option value="21">21</option>
450: <option value="22">22</option>
451: <option value="23">23</option>
452: <option value="24">24</option>
453: <option value="25">25</option>
454: <option value="26">26</option>
455: <option value="27">27</option>
456: <option value="28">28</option>
457: <option value="29">29</option>
458: <option value="30">30</option>
459: <option value="31">31</option>
1.3 harris41 460: </select>
1.11 harris41 461: END
462: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
463: my $year=<<END;
1.8 harris41 464: <select name="${name}_year">
1.11 harris41 465: <option value='$defaultyear'> </option>
466: <option value="1976">1976</option>
467: <option value="1977">1977</option>
468: <option value="1978">1978</option>
469: <option value="1979">1979</option>
470: <option value="1980">1980</option>
471: <option value="1981">1981</option>
472: <option value="1982">1982</option>
473: <option value="1983">1983</option>
474: <option value="1984">1984</option>
475: <option value="1985">1985</option>
476: <option value="1986">1986</option>
477: <option value="1987">1987</option>
478: <option value="1988">1988</option>
479: <option value="1989">1989</option>
480: <option value="1990">1990</option>
481: <option value="1991">1991</option>
482: <option value="1992">1992</option>
483: <option value="1993">1993</option>
484: <option value="1994">1994</option>
485: <option value="1995">1995</option>
486: <option value="1996">1996</option>
487: <option value="1997">1997</option>
488: <option value="1998">1998</option>
489: <option value="1999">1999</option>
490: <option value="2000">2000</option>
491: <option value="2001">2001</option>
492: <option value="2002">2002</option>
493: <option value="2003">2003</option>
494: <option value="2004">2004</option>
495: <option value="2005">2005</option>
496: <option value="2006">2006</option>
497: <option value="2007">2007</option>
498: <option value="2008">2008</option>
499: <option value="2009">2009</option>
500: <option value="2010">2010</option>
501: <option value="2011">2011</option>
502: <option value="2012">2012</option>
503: <option value="2013">2013</option>
504: <option value="2014">2014</option>
505: <option value="2015">2015</option>
506: <option value="2016">2016</option>
507: <option value="2017">2017</option>
508: <option value="2018">2018</option>
509: <option value="2019">2019</option>
510: <option value="2020">2020</option>
511: <option value="2021">2021</option>
512: <option value="2022">2022</option>
513: <option value="2023">2023</option>
514: <option value="2024">2024</option>
515: <option value="2025">2025</option>
516: <option value="2026">2026</option>
517: <option value="2027">2027</option>
518: <option value="2028">2028</option>
519: <option value="2029">2029</option>
520: <option value="2030">2030</option>
521: <option value="2031">2031</option>
522: <option value="2032">2032</option>
523: <option value="2033">2033</option>
524: <option value="2034">2034</option>
525: <option value="2035">2035</option>
526: <option value="2036">2036</option>
527: <option value="2037">2037</option>
528: <option value="2038">2038</option>
529: <option value="2039">2039</option>
530: <option value="2040">2040</option>
531: <option value="2041">2041</option>
532: <option value="2042">2042</option>
533: <option value="2043">2043</option>
534: <option value="2044">2044</option>
535: <option value="2045">2045</option>
536: <option value="2046">2046</option>
537: <option value="2047">2047</option>
538: <option value="2048">2048</option>
539: <option value="2049">2049</option>
540: <option value="2050">2050</option>
541: <option value="2051">2051</option>
1.3 harris41 542: </select>
543: END
1.11 harris41 544: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
545: return "$month$day$year";
1.3 harris41 546: }
547:
548: sub selectbox {
1.111 harris41 549: my ($title,$name,$value,$anyvalue,$anytag,$functionref,@idlist)=@_;
1.3 harris41 550: my $uctitle=uc($title);
551: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
1.98 harris41 552: "</b></font><br />".'<select name="'.$name.'">';
1.111 harris41 553: foreach ($anyvalue,@idlist) {
1.68 harris41 554: $selout.='<option value=\''.$_.'\'';
1.111 harris41 555: if ($_ eq $value and !/^any$/) {
556: $selout.=' selected>'.&{$functionref}($_).'</option>';
557: }
558: elsif ($_ eq $value and /^$anyvalue$/) {
559: $selout.=' selected>'.$anytag.'</option>';
560: }
561: else {$selout.='>'.&{$functionref}($_).'</option>';}
1.109 harris41 562: }
1.3 harris41 563: return $selout.'</select>';
1.6 harris41 564: }
565:
1.111 harris41 566: sub testf {
567: return @_[0];
568: }
569:
1.45 harris41 570: # ----------------------------------------------- Performing an advanced search
1.18 harris41 571: sub advancedsearch {
572: my ($r,$envhash)=@_;
573: my %ENV=%{$envhash};
574:
1.32 harris41 575: my $fillflag=0;
1.64 harris41 576: # Clean up fields for safety
577: for my $field ('title','author','subject','keywords','url','version',
578: 'creationdatestart_month','creationdatestart_day',
579: 'creationdatestart_year','creationdateend_month',
580: 'creationdateend_day','creationdateend_year',
581: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
582: 'lastrevisiondatestart_year','lastrevisiondateend_month',
583: 'lastrevisiondateend_day','lastrevisiondateend_year',
584: 'notes','abstract','mime','language','owner',
1.77 harris41 585: 'custommetadata','customshow') {
1.101 harris41 586: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1.64 harris41 587: }
1.90 harris41 588:
589: # Check to see if enough information was filled in
1.32 harris41 590: for my $field ('title','author','subject','keywords','url','version',
591: 'notes','abstract','mime','language','owner',
592: 'custommetadata') {
1.40 harris41 593: if (&filled($ENV{"form.$field"})) {
1.32 harris41 594: $fillflag++;
595: }
596: }
597: unless ($fillflag) {
598: &output_blank_field_error($r);
599: return OK;
600: }
1.39 harris41 601:
1.90 harris41 602:
603: # Turn the form input into a SQL-based query
1.39 harris41 604: my $query='';
1.44 harris41 605:
1.45 harris41 606: my @queries;
1.90 harris41 607: # Evaluate logical expression AND/OR/NOT phrase fields.
1.58 harris41 608: foreach my $field ('title','author','subject','notes','abstract','url',
609: 'keywords','version','owner') {
1.44 harris41 610: if ($ENV{'form.'.$field}) {
1.45 harris41 611: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
1.44 harris41 612: }
613: }
1.90 harris41 614: # Evaluate option lists
1.58 harris41 615: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1.90 harris41 616: push @queries,"(language like \"$ENV{'form.language'}\")";
1.58 harris41 617: }
618: if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
1.90 harris41 619: push @queries,"(mime like \"$ENV{'form.mime'}\")";
1.58 harris41 620: }
621: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1.90 harris41 622: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1.58 harris41 623: }
1.90 harris41 624: # Evaluate date windows
1.60 harris41 625: my $datequery=&build_date_queries(
626: $ENV{'form.creationdatestart_month'},
627: $ENV{'form.creationdatestart_day'},
628: $ENV{'form.creationdatestart_year'},
629: $ENV{'form.creationdateend_month'},
630: $ENV{'form.creationdateend_day'},
631: $ENV{'form.creationdateend_year'},
632: $ENV{'form.lastrevisiondatestart_month'},
633: $ENV{'form.lastrevisiondatestart_day'},
634: $ENV{'form.lastrevisiondatestart_year'},
635: $ENV{'form.lastrevisiondateend_month'},
636: $ENV{'form.lastrevisiondateend_day'},
637: $ENV{'form.lastrevisiondateend_year'},
638: );
1.90 harris41 639: # Test to see if date windows are legitimate
1.61 harris41 640: if ($datequery=~/^Incorrect/) {
641: &output_date_error($r,$datequery);
642: return OK;
643: }
644: elsif ($datequery) {
1.60 harris41 645: push @queries,$datequery;
646: }
1.90 harris41 647:
648: # Process form information for custom metadata querying
1.76 harris41 649: my $customquery='';
1.64 harris41 650: if ($ENV{'form.custommetadata'}) {
651: $customquery=&build_custommetadata_query('custommetadata',
652: $ENV{'form.custommetadata'});
653: }
1.83 harris41 654: my $customshow='';
655: if ($ENV{'form.customshow'}) {
656: $customshow=$ENV{'form.customshow'};
657: $customshow=~s/[^\w\s]//g;
658: my @fields=split(/\s+/,$customshow);
659: $customshow=join(" ",@fields);
660: }
1.90 harris41 661: # Send query statements over the network to be processed by either the SQL
662: # database or a recursive scheme of 'grep'-like actions (for custom
663: # metadata).
1.45 harris41 664: if (@queries) {
1.58 harris41 665: $query=join(" AND ",@queries);
1.46 harris41 666: $query="select * from metadata where $query";
1.90 harris41 667: my $reply; # reply hash reference
1.83 harris41 668: unless ($customquery or $customshow) {
1.76 harris41 669: $reply=&Apache::lonnet::metadata_query($query);
670: }
671: else {
1.83 harris41 672: $reply=&Apache::lonnet::metadata_query($query,
673: $customquery,$customshow);
1.76 harris41 674: }
1.64 harris41 675: &output_results('Advanced',$r,$envhash,$customquery,$reply);
1.45 harris41 676: }
1.86 harris41 677: elsif ($customquery) {
1.90 harris41 678: my $reply; # reply hash reference
1.86 harris41 679: $reply=&Apache::lonnet::metadata_query('',
680: $customquery,$customshow);
681: &output_results('Advanced',$r,$envhash,$customquery,$reply);
1.45 harris41 682: }
1.92 harris41 683: # should not get to this point
684: return 'Error. Should not have gone to this point.';
1.18 harris41 685: }
686:
1.6 harris41 687: # --------------------------------------------------- Performing a basic search
688: sub basicsearch {
1.19 harris41 689: my ($r,$envhash)=@_;
690: my %ENV=%{$envhash};
1.64 harris41 691: # Clean up fields for safety
692: for my $field ('basicexp') {
693: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
694: }
695:
1.90 harris41 696: # Check to see if enough is filled in
1.26 harris41 697: unless (&filled($ENV{'form.basicexp'})) {
1.24 harris41 698: &output_blank_field_error($r);
699: return OK;
700: }
1.22 harris41 701:
1.90 harris41 702: # Build SQL query string based on form page
1.39 harris41 703: my $query='';
1.33 harris41 704: my $concatarg=join('," ",',
705: ('title', 'author', 'subject', 'notes', 'abstract'));
1.95 harris41 706: $concatarg='title' if $ENV{'form.titleonly'};
1.94 harris41 707:
708: $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
709:
1.90 harris41 710: # Get reply (either a hash reference to filehandles or bad connection)
1.94 harris41 711: my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
1.90 harris41 712:
713: # Output search results
1.98 harris41 714:
1.44 harris41 715: &output_results('Basic',$r,$envhash,$query,$reply);
1.90 harris41 716:
1.18 harris41 717: return OK;
1.22 harris41 718: }
719:
1.98 harris41 720: # ------------------------------------------------------------- build_SQL_query
721: sub build_SQL_query {
722: my ($field_name,$logic_statement)=@_;
723: my $q=new Text::Query('abc',
724: -parse => 'Text::Query::ParseAdvanced',
725: -build => 'Text::Query::Build');
726: $q->prepare($logic_statement);
727: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
728: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
729: return $sql_query;
730: }
731:
732: # ------------------------------------------------- build custom metadata query
733: sub build_custommetadata_query {
734: my ($field_name,$logic_statement)=@_;
735: my $q=new Text::Query('abc',
736: -parse => 'Text::Query::ParseAdvanced',
737: -build => 'Text::Query::BuildAdvancedString');
738: $q->prepare($logic_statement);
739: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
740: # quick fix to change literal into xml tag-matching
741: # will eventually have to write a separate builder module
742: my $oldmatchexp=$matchexp;
743: $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
744: return $matchexp;
745: }
746:
747: # - Recursively parse a reverse notation expression into a SQL query expression
748: sub recursive_SQL_query_build {
749: my ($dkey,$pattern)=@_;
750: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
751: return $pattern unless @matches;
752: foreach my $match (@matches) {
753: $match=~/\[ (\w+)\s(.*) \]/;
754: my ($key,$value)=($1,$2);
755: my $replacement='';
756: if ($key eq 'literal') {
757: $replacement="($dkey like \"\%$value\%\")";
758: }
759: elsif ($key eq 'not') {
760: $value=~s/like/not like/;
761: # $replacement="($dkey not like $value)";
762: $replacement="$value";
763: }
764: elsif ($key eq 'and') {
765: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
766: $replacement="($1 AND $2)";
767: }
768: elsif ($key eq 'or') {
769: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
770: $replacement="($1 OR $2)";
771: }
772: substr($pattern,
773: index($pattern,$match),
774: length($match),
775: $replacement
776: );
777: }
778: &recursive_SQL_query_build($dkey,$pattern);
779: }
1.22 harris41 780:
1.98 harris41 781: # ------------------------------------------------------------ Build date query
782: sub build_date_queries {
783: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
784: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
785: my @queries;
786: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
787: unless ($cmonth1 and $cday1 and $cyear1 and
788: $cmonth2 and $cday2 and $cyear2) {
789: return "Incorrect entry for the creation date. You must specify ".
790: "a starting month, day, and year and an ending month, ".
791: "day, and year.";
792: }
793: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
794: $cnumeric1+=0;
795: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
796: $cnumeric2+=0;
797: if ($cnumeric1>$cnumeric2) {
798: return "Incorrect entry for the creation date. The starting ".
799: "date must occur before the ending date.";
800: }
801: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
802: "$cyear2-$cmonth2-$cday2 23:59:59')";
803: push @queries,$cquery;
804: }
805: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
806: unless ($lmonth1 and $lday1 and $lyear1 and
807: $lmonth2 and $lday2 and $lyear2) {
808: return "Incorrect entry for the last revision date. You must ".
809: "specify a starting month, day, and year and an ending ".
810: "month, day, and year.";
811: }
812: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
813: $lnumeric1+=0;
814: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
815: $lnumeric2+=0;
816: if ($lnumeric1>$lnumeric2) {
817: return "Incorrect entry for the last revision date. The ".
818: "starting date must occur before the ending date.";
819: }
820: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
821: "$lyear2-$lmonth2-$lday2 23:59:59')";
822: push @queries,$lquery;
823: }
824: if (@queries) {
825: return join(" AND ",@queries);
826: }
827: return '';
1.18 harris41 828: }
1.6 harris41 829:
1.18 harris41 830: # ----------------------------- format and output results based on a reply list
1.98 harris41 831: # There are two windows that this function writes to. The main search
832: # window ("srch") has a listing of the results. A secondary window ("popwin")
833: # gives the status of the network search (time elapsed, number of machines
834: # contacted, etc.)
1.18 harris41 835: sub output_results {
1.101 harris41 836: my $fnum; # search result counter
1.92 harris41 837: my ($mode,$r,$envhash,$query,$replyref)=@_;
1.19 harris41 838: my %ENV=%{$envhash};
1.92 harris41 839: my %rhash=%{$replyref};
1.44 harris41 840: my $compiledresult='';
1.102 harris41 841: my $timeremain=300;
1.98 harris41 842: my $elapsetime=0;
1.93 harris41 843: my $resultflag=0;
844: my $tflag=1;
845:
846: # make query information persistent to allow for subsequent revision
847: my $persistent=&make_persistent();
848:
849: # output beginning of search page
1.92 harris41 850: $r->print(<<BEGINNING);
851: <html>
852: <head>
853: <title>The LearningOnline Network with CAPA</title>
854: BEGINNING
1.98 harris41 855:
856: # conditional output of script functions dependent on the mode in
857: # which the search was invoked
1.92 harris41 858: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
1.100 harris41 859: <script type="text/javascript">
1.92 harris41 860: function select_data(title,url) {
861: changeTitle(title);
862: changeURL(url);
1.97 harris41 863: self.close();
1.92 harris41 864: }
865: function changeTitle(val) {
866: if (opener.inf.document.forms.resinfo.elements.t) {
867: opener.inf.document.forms.resinfo.elements.t.value=val;
868: }
869: }
870: function changeURL(val) {
871: if (opener.inf.document.forms.resinfo.elements.u) {
872: opener.inf.document.forms.resinfo.elements.u.value=val;
873: }
874: }
875: </script>
876: SCRIPT
1.98 harris41 877: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
1.100 harris41 878: <script type="text/javascript">
1.98 harris41 879: function select_data(title,url) {
1.101 harris41 880: // alert('DEBUG: Should be storing '+title+' and '+url);
1.98 harris41 881: }
882: function queue(val) {
1.101 harris41 883: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
1.98 harris41 884: document.forms.results.acts.value+='1a'+val+'b';
885: }
886: else {
887: document.forms.results.acts.value+='0a'+val+'b';
888: }
889: }
890: function select_group() {
1.101 harris41 891: window.location="/adm/groupsort?catalogmode=groupsearch&acts="+
892: document.forms.results.acts.value;
1.98 harris41 893: }
894: </script>
895: SCRIPT
1.100 harris41 896: $r->print(<<SCRIPT);
897: <script type="text/javascript">
1.98 harris41 898: function displayinfo(val) {
899: popwin.document.forms.popremain.sdetails.value=val;
900: }
1.100 harris41 901: function openhelp(val) {
902: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
903: 'scrollbars=1,width=400,height=300');
904: openhelpwin.focus();
905: }
1.102 harris41 906: function abortsearch(val) {
907: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
908: 'scrollbars=1,width=400,height=300');
909: openhelpwin.focus();
910: }
1.98 harris41 911: </script>
912: SCRIPT
913: $r->rflush();
914:
915: # begin showing the cataloged results
1.92 harris41 916: $r->print(<<CATALOGBEGIN);
917: </head>
918: <body bgcolor="#ffffff">
919: <img align=right src=/adm/lonIcons/lonlogos.gif>
920: <h1>Search Catalog</h1>
921: CATALOGBEGIN
1.98 harris41 922: $r->print(<<CATALOGCONTROLS);
923: <form name='results' method="post" action="/adm/searchcat">
924: <input type='hidden' name='acts' value='' />
1.93 harris41 925: <input type='button' value='Revise search request'
1.98 harris41 926: onClick='this.form.submit();' />
927: $importbutton
1.93 harris41 928: $closebutton
929: $persistent
1.98 harris41 930: <hr />
1.93 harris41 931: <h3>Search Query</h3>
1.98 harris41 932: CATALOGCONTROLS
1.93 harris41 933: if ($mode eq 'Basic') {
934: $r->print(<<RESULTS);
935: <p>
936: <b>Basic search:</b> $ENV{'form.basicexp'}
937: </p>
938: RESULTS
939: }
940: elsif ($mode eq 'Advanced') {
941: $r->print(<<RESULTS);
942: <p>
943: <b>Advanced search</b>
944: $query
945: </p>
946: RESULTS
947: }
948: $r->print('<h3>Search Results</h3>');
1.92 harris41 949: $r->rflush();
1.98 harris41 950: my $servernum=(keys %rhash)+0;
951:
952: # define server grid (shows status of multiple machines)
953: my $hcinit;
954: my $grid="'<br />'+";
955: $grid.="\n";
956: my $sn=1;
957: for my $sk (sort keys %rhash) {
958: # '<a href="
959: $grid.="'<a href=\"";
960: # javascript:displayinfo('+
961: $grid.="javascript:opener.displayinfo('+";
962: # "'"+'key
963: $grid.="\"'\"+'";
1.99 harris41 964: $grid.=$sk;
1.98 harris41 965: my $hc;
966: if ($rhash{$sk} eq 'con_lost') {
1.116 ! matthew 967: $hc="BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR ";
1.98 harris41 968: }
969: else {
970: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1.99 harris41 971: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1.98 harris41 972: }
973: $grid.=" hitcount=".$hc;
1.99 harris41 974: $grid.=" domain=".$hostdomains{$sk};
1.98 harris41 975: $grid.=" IP=".$hostips{$sk};
976: # '+"'"+'">'+
977: $grid.="'+\"'\"+')\">'+";
978: $grid.="\n";
979: $grid.="'<img border=\"0\" name=\"img".$sn."\"".
1.99 harris41 980: " src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk."\" /></a>'+\n";
1.98 harris41 981: $grid.="'<br />'+\n" unless $sn%10;
982: $sn++;
983: }
1.92 harris41 984: $r->print(<<ENDPOP);
1.100 harris41 985: <script type="text/javascript">
1.116 ! matthew 986: popwin=open('','popwin','scrollbars=1,width=400,height=220');
1.98 harris41 987: popwin.focus();
988: popwin.document.writeln('<'+'html>');
989: popwin.document.writeln('<'+'head>');
990: popwin.document.writeln('<'+'script>');
991: popwin.document.writeln('hc=new Array();$hcinit');
992: popwin.document.writeln('<'+'/script>');
993: popwin.document.writeln('<'+'/head>'+
994: '<'+'body bgcolor="#FFFFFF">'+
1.100 harris41 995: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1.99 harris41 996: 'lonanim.gif" '+
997: 'alt="animated logo" />'+
1.98 harris41 998: '<'+'h3>Search Results Progress<'+'/h3>'+
999: '<'+'form name="popremain">'+
1000: '<'+'tt>'+
1.99 harris41 1001: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1.98 harris41 1002: '<'+'br />SCANNING $servernum SERVERS'+
1003: '<'+'br clear="all" />Number of record hits found '+
1004: '<'+'input type="text" size="10" name="numhits"'+
1005: ' value="0" />'+
1006: '<'+'br clear="all" />Time elapsed '+
1007: '<'+'input type="text" size="10" name="elapsetime"'+
1008: ' value="0" />'+
1009: '<'+'br />'+
1010: 'SERVER GRID (click on any cell for details)'+
1011: $grid
1012: '<'+'br />'+
1013: 'Server details '+
1.116 ! matthew 1014: '<'+'input type="text" size="35" name="sdetails"'+
1.98 harris41 1015: ' value="" />'+
1016: '<'+'br />'+
1017: ' <'+'input type="button" name="button"'+
1.100 harris41 1018: ' value="abort search and view current results" '+
1.102 harris41 1019: ' onClick="javascript:opener.abortsearch()" />'+
1.98 harris41 1020: ' <'+'input type="button" name="button"'+
1.100 harris41 1021: ' value="help" onClick="javascript:opener.openhelp()" />'+
1.98 harris41 1022: '<'+'/tt>'+
1023: '<'+'/form>'+
1024: '<'+'/body><'+'/html>');
1.92 harris41 1025: popwin.document.close();
1026: </script>
1027: ENDPOP
1028: $r->rflush();
1.44 harris41 1029:
1.93 harris41 1030: my $servercount=0;
1.98 harris41 1031: my $hitcountsum=0;
1.102 harris41 1032: my $bloop=$servernum;
1033: my %orkey;
1034: BLOOP: while(1) {
1035: my $sn=0;
1036: last BLOOP unless $bloop;
1.107 harris41 1037: last BLOOP unless $timeremain;
1.102 harris41 1038: RLOOP: foreach my $rkey (sort keys %rhash) {
1.98 harris41 1039: $sn++;
1.102 harris41 1040: next RLOOP if $orkey{$rkey};
1.93 harris41 1041: $servercount++;
1042: $tflag=1;
1043: $compiledresult='';
1044: my $hostname=$rkey;
1.92 harris41 1045: my $reply=$rhash{$rkey};
1.18 harris41 1046: my @results;
1.92 harris41 1047:
1.18 harris41 1048: my $replyfile='';
1.93 harris41 1049:
1050: if ($reply eq 'con_lost') {
1.100 harris41 1051: $r->print('<script type="text/javascript">popwin.document.img'.
1052: $sn.'.'.
1.99 harris41 1053: 'src="/adm/lonIcons/srvbad.gif";</script>'.
1054: "\n");
1055: $r->rflush();
1.102 harris41 1056: $bloop--;
1057: $orkey{$rkey}=1;
1.93 harris41 1058: }
1059: else {
1060: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
1061: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1062: $reply=~/(.*?)\_/;
1063: {
1.98 harris41 1064: my $temp=0;
1065: WLOOP: while (1) {
1066: if (-e $replyfile && $tflag) {
1.100 harris41 1067: $r->print('<script type="text/javascript">'.
1068: 'popwin.document.img'.$sn.'.'.
1.99 harris41 1069: 'src="/adm/lonIcons/srvhalf.gif";</script>'.
1.98 harris41 1070: "\n");
1071: $r->rflush();
1.100 harris41 1072: $r->print('<script type="text/javascript">'.
1073: 'popwin.hc["'.$rkey.'"]='.
1.99 harris41 1074: '"still transferring..."'.';</script>'.
1.98 harris41 1075: "\n");
1076: $r->rflush();
1077: $tflag=0;
1078: }
1079: if (-e "$replyfile.end") {
1.102 harris41 1080: $bloop--;
1081: $orkey{$rkey}=1;
1.98 harris41 1082: if (-s $replyfile) {
1.100 harris41 1083: $r->print('<script type="text/javascript">'.
1084: 'popwin.document.img'.$sn.'.'.
1085: 'src="/adm/lonIcons/srvgood.gif";'.
1086: '</script>'."\n");
1.98 harris41 1087: $r->rflush();
1088: my $fh=Apache::File->new($replyfile) or
1089: ($r->print('ERROR: file '.
1090: $replyfile.' cannot be opened') and
1091: return OK);
1092: @results=<$fh> if $fh;
1093: $hitcount{$rkey}=@results+0;
1.100 harris41 1094: $r->print('<script type="text/javascript">'.
1095: 'popwin.hc["'.$rkey.'"]='.
1.98 harris41 1096: $hitcount{$rkey}.';</script>'.
1097: "\n");
1098: $r->rflush();
1099: $hitcountsum+=$hitcount{$rkey};
1.100 harris41 1100: $r->print('<script type="text/javascript">'.
1101: 'popwin.document.forms.popremain.'.
1.98 harris41 1102: 'numhits.value='.$hitcountsum.
1103: ';</script>'.
1104: "\n");
1105: $r->rflush();
1106: }
1.99 harris41 1107: else {
1.100 harris41 1108: $r->print('<script type="text/javascript">'.
1109: 'popwin.document.img'.$sn.'.'.
1110: 'src="/adm/lonIcons/srvempty.gif";'.
1111: '</script>'.
1112: "\n");
1.99 harris41 1113: $r->rflush();
1.100 harris41 1114: $r->print('<script type="text/javascript">'.
1115: 'popwin.hc["'.$rkey.'"]=0'.
1.99 harris41 1116: ';</script>'.
1117: "\n");
1118: $r->rflush();
1119: }
1.107 harris41 1120: last WLOOP;
1121: }
1122: if ($temp>1) {
1123: sleep 1;
1124: $timeremain--;
1125: $elapsetime++;
1.98 harris41 1126: last WLOOP;
1127: }
1128: last WLOOP unless $timeremain;
1129: sleep 1;
1130: $timeremain--;
1131: $elapsetime++;
1.100 harris41 1132: $r->print('<script type="text/javascript">'.
1133: 'popwin.document.popremain.elapsetime.'.
1.98 harris41 1134: 'value="'.$elapsetime.'";</script>'."\n");
1135: $r->rflush();
1136: $temp++;
1137: }
1.93 harris41 1138: }
1.100 harris41 1139: $r->print('<script type="text/javascript">'.
1140: 'popwin.document.whirly.'.
1141: 'src="'.'/adm/lonIcons/lonanimend.gif'.
1142: '";</script>'."\n");
1143: $r->rflush();
1.6 harris41 1144: }
1.77 harris41 1145: my $customshow='';
1146: my $extrashow='';
1.87 harris41 1147: my @customfields;
1.77 harris41 1148: if ($ENV{'form.customshow'}) {
1149: $customshow=$ENV{'form.customshow'};
1150: $customshow=~s/[^\w\s]//g;
1.87 harris41 1151: my @fields=map {"<font color=\"#008000\">$_:</font><!-- $_ -->"}
1.93 harris41 1152: split(/\s+/,$customshow);
1.88 harris41 1153: @customfields=split(/\s+/,$customshow);
1.81 harris41 1154: if ($customshow) {
1155: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1156: }
1.77 harris41 1157: }
1.79 harris41 1158: my $customdata='';
1.87 harris41 1159: my %customhash;
1.79 harris41 1160: foreach my $result (@results) {
1.82 harris41 1161: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1.87 harris41 1162: my $tmp=$result;
1163: $tmp=~s/^custom\=//;
1164: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1165: } split(/\,/,$tmp);
1166: $customhash{$k}=$v;
1.82 harris41 1167: }
1.79 harris41 1168: }
1.101 harris41 1169: if (keys %hash) {
1170: untie %hash;
1171: }
1172: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1173: if ($ENV{'form.launch'} eq '1') {
1174: &start_fresh_session();
1175: }
1176: foreach my $result (@results) {
1177: next if $result=~/^custom\=/;
1178: chomp $result;
1179: next unless $result;
1180: my @fields=map
1181: {&Apache::lonnet::unescape($_)}
1182: (split(/\,/,$result));
1183: my ($title,$author,$subject,$url,$keywords,$version,
1184: $notes,$abstract,$mime,$lang,
1185: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1.102 harris41 1186:
1187: unless ($ENV{'user.adv'}) {
1188: $keywords='<i>- not displayed -</i>';
1189: $fields[4]=$keywords;
1190: $notes='<i>- not displayed -</i>';
1191: $fields[6]=$notes;
1192: $abstract='<i>- not displayed -</i>';
1193: $fields[7]=$abstract;
1194: $subject='<i>- not displayed -</i>';
1195: $fields[2]=$subject;
1196: }
1197:
1.101 harris41 1198: my $shortabstract=$abstract;
1.102 harris41 1199: $shortabstract=substr($abstract,0,200).'...' if length($abstract)>200;
1.101 harris41 1200: $fields[7]=$shortabstract;
1.102 harris41 1201: my $shortkeywords=$keywords;
1202: $shortkeywords=substr($keywords,0,200).'...' if length($keywords)>200;
1203: $fields[4]=$shortkeywords;
1204:
1.101 harris41 1205: my $extrashow2=$extrashow;
1206: if ($extrashow) {
1207: foreach my $field (@customfields) {
1208: my $value='';
1209: if ($customhash{$url}=~/\<${field}[^\>]*\>(.*?)\<\/${field}[^\>]*\>/s) {
1210: $value=$1;
1211: }
1212: $extrashow2=~s/\<\!\-\- $field \-\-\>/ $value/g;
1213: }
1214: }
1.93 harris41 1215:
1.101 harris41 1216: $compiledresult.=<<END if $compiledresult or $servercount!=$servernum;
1.89 harris41 1217: <hr align='left' width='200' noshade />
1218: END
1.101 harris41 1219: $compiledresult.=<<END;
1.56 harris41 1220: <p>
1.8 harris41 1221: END
1.115 harris41 1222: if ($ENV{'form.catalogmode'} eq 'interactive') {
1223: my $titleesc=$title;
1.116 ! matthew 1224: $titleesc=~s/\'/\\'/; # '
1.115 harris41 1225:
1.116 ! matthew 1226: $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');
1.8 harris41 1227: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1.115 harris41 1228: onClick="javascript:select_data('$titleesc','$url')">
1.8 harris41 1229: </font>
1.98 harris41 1230: <br />
1231: END
1.115 harris41 1232: }
1.101 harris41 1233: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1234: $fnum+=0;
1235: $hash{"pre_${fnum}_link"}=$url;
1236: $hash{"pre_${fnum}_title"}=$title;
1237: $compiledresult.=<<END;
1.98 harris41 1238: <font size='-1'><input type="checkbox" name="returnvalues" value="SELECT"
1239: onClick="javascript:queue($fnum)" />
1240: </font>
1241: <br />
1.8 harris41 1242: END
1.101 harris41 1243: # <input type="hidden" name="title$fnum" value="$title" />
1244: # <input type="hidden" name="url$fnum" value="$url" />
1245: $fnum++;
1246: }
1247: my $httphost=$ENV{'HTTP_HOST'};
1248:
1249: my $viewselect;
1250: if ($mode eq 'Basic') {
1251: $viewselect=$ENV{'form.basicviewselect'};
1252: }
1253: elsif ($mode eq 'Advanced') {
1254: $viewselect=$ENV{'form.advancedviewselect'};
1255: }
1.55 harris41 1256:
1.101 harris41 1257: if ($viewselect eq 'Detailed Citation View') {
1258: $compiledresult.=&detailed_citation_view(@fields,
1.93 harris41 1259: $hostname,$httphost,
1260: $extrashow2);
1.101 harris41 1261: }
1262: elsif ($viewselect eq 'Summary View') {
1263: $compiledresult.=&summary_view(@fields,$hostname,$httphost,
1.93 harris41 1264: $extrashow2);
1.101 harris41 1265: }
1266: elsif ($viewselect eq 'Fielded Format') {
1267: $compiledresult.=&fielded_format_view(@fields,$hostname,
1.93 harris41 1268: $httphost,$extrashow2);
1.101 harris41 1269: }
1270: elsif ($viewselect eq 'XML/SGML') {
1271: $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,
1.93 harris41 1272: $extrashow2);
1.101 harris41 1273: }
1.93 harris41 1274:
1.101 harris41 1275: }
1276:
1277: untie %hash;
1.18 harris41 1278: }
1.101 harris41 1279: else {
1280: $r->print('<html><head></head><body>Unable to tie hash to db '.
1281: 'file</body></html>');
1282: }
1.93 harris41 1283: if ($compiledresult) {
1284: $resultflag=1;
1.18 harris41 1285: }
1.6 harris41 1286:
1.43 harris41 1287: $r->print(<<RESULTS);
1.93 harris41 1288: $compiledresult
1.43 harris41 1289: RESULTS
1.93 harris41 1290: my $percent=sprintf('%3.0f',($servercount/$servernum*100));
1.44 harris41 1291: }
1.102 harris41 1292: }
1.93 harris41 1293: unless ($resultflag) {
1294: $r->print("\nThere were no results that matched your query\n");
1.43 harris41 1295: }
1.100 harris41 1296: # $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush();
1.93 harris41 1297: $r->print(<<RESULTS);
1.6 harris41 1298: </body>
1299: </html>
1300: RESULTS
1.41 harris41 1301: }
1302:
1.50 harris41 1303: # ------------------------------------------------------ Detailed Citation View
1304: sub detailed_citation_view {
1305: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1306: $notes,$shortabstract,$mime,$lang,
1307: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1308: $hostname,$httphost,$extrashow)=@_;
1.50 harris41 1309: my $result=<<END;
1.56 harris41 1310: <i>$owner</i>, last revised $lastrevisiondate
1311: <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
1312: <h3>$author</h3>
1313: </p>
1314: <p>
1.98 harris41 1315: <b>Subject:</b> $subject<br />
1316: <b>Keyword(s):</b> $keywords<br />
1317: <b>Notes:</b> $notes<br />
1.111 harris41 1318: <b>MIME Type:</b>
1319: END
1320: $result.=&Apache::loncommon::filedescription($mime);
1321: $result.=<<END;
1322: <br />
1323: <b>Language:</b>
1324: END
1325: $result.=&Apache::loncommon::languagedescription($lang);
1326: $result.=<<END;
1327: <br />
1328: <b>Copyright/Distribution:</b>
1329: END
1330: $result.=&Apache::loncommon::copyrightdescription($copyright);
1331: $result.=<<END;
1332: <br />
1.78 harris41 1333: </p>
1.77 harris41 1334: $extrashow
1.78 harris41 1335: <p>
1.56 harris41 1336: $shortabstract
1.50 harris41 1337: </p>
1338: END
1339: return $result;
1340: }
1341:
1342: # ---------------------------------------------------------------- Summary View
1343: sub summary_view {
1344: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1345: $notes,$shortabstract,$mime,$lang,
1346: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1347: $hostname,$httphost,$extrashow)=@_;
1.111 harris41 1348: my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
1.50 harris41 1349: my $result=<<END;
1.56 harris41 1350: <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
1351: $title<br />
1352: $owner -- $lastrevisiondate<br />
1.111 harris41 1353: $cprtag<br />
1.77 harris41 1354: $extrashow
1.50 harris41 1355: </p>
1356: END
1357: return $result;
1358: }
1359:
1360: # -------------------------------------------------------------- Fielded Format
1361: sub fielded_format_view {
1362: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1363: $notes,$shortabstract,$mime,$lang,
1364: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1365: $hostname,$httphost,$extrashow)=@_;
1.111 harris41 1366: my $mimetag=&Apache::loncommon::filedescription($mime);
1367: my $language=&Apache::loncommon::languagedescription($lang);
1368: my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
1.50 harris41 1369: my $result=<<END;
1.51 harris41 1370: <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
1.56 harris41 1371: <br />
1372: <b>Title:</b> $title<br />
1373: <b>Author(s):</b> $author<br />
1374: <b>Subject:</b> $subject<br />
1375: <b>Keyword(s):</b> $keywords<br />
1376: <b>Notes:</b> $notes<br />
1.111 harris41 1377: <b>MIME Type:</b> $mimetag<br />
1378: <b>Language:</b> $language<br />
1.56 harris41 1379: <b>Creation Date:</b> $creationdate<br />
1380: <b>Last Revision Date:</b> $lastrevisiondate<br />
1381: <b>Publisher/Owner:</b> $owner<br />
1.111 harris41 1382: <b>Copyright/Distribution:</b> $cprtag<br />
1.56 harris41 1383: <b>Repository Location:</b> $hostname<br />
1384: <b>Abstract:</b> $shortabstract<br />
1.77 harris41 1385: $extrashow
1.50 harris41 1386: </p>
1387: END
1388: return $result;
1389: }
1390:
1391: # -------------------------------------------------------------------- XML/SGML
1392: sub xml_sgml_view {
1393: my ($title,$author,$subject,$url,$keywords,$version,
1.51 harris41 1394: $notes,$shortabstract,$mime,$lang,
1395: $creationdate,$lastrevisiondate,$owner,$copyright,
1.77 harris41 1396: $hostname,$httphost,$extrashow)=@_;
1.111 harris41 1397: my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
1398: my $mimetag=&Apache::loncommon::filedescription($mime);
1399: my $language=&Apache::loncommon::languagedescription($lang);
1.50 harris41 1400: my $result=<<END;
1.56 harris41 1401: <pre>
1402: <LonCapaResource>
1.57 harris41 1403: <url>$url</url>
1.56 harris41 1404: <title>$title</title>
1405: <author>$author</author>
1406: <subject>$subject</subject>
1407: <keywords>$keywords</keywords>
1408: <notes>$notes</notes>
1409: <mimeInfo>
1410: <mime>$mime</mime>
1.111 harris41 1411: <mimetag>$mimetag</mimetag>
1.56 harris41 1412: </mimeInfo>
1413: <languageInfo>
1414: <language>$lang</language>
1.111 harris41 1415: <languagetag>$language</languagetag>
1.56 harris41 1416: </languageInfo>
1417: <creationdate>$creationdate</creationdate>
1418: <lastrevisiondate>$lastrevisiondate</lastrevisiondate>
1419: <owner>$owner</owner>
1420: <copyrightInfo>
1421: <copyright>$copyright</copyright>
1.111 harris41 1422: <copyrighttag>$cprtag</copyrighttag>
1.56 harris41 1423: </copyrightInfo>
1424: <repositoryLocation>$hostname</repositoryLocation>
1425: <shortabstract>$shortabstract</shortabstract>
1.57 harris41 1426: </LonCapaResource>
1.56 harris41 1427: </pre>
1.77 harris41 1428: $extrashow
1.50 harris41 1429: END
1430: return $result;
1.60 harris41 1431: }
1432:
1.98 harris41 1433: # ---------------------------------------------------- see if a field is filled
1434: sub filled {
1435: my ($field)=@_;
1436: if ($field=~/\S/ && $field ne 'any') {
1437: return 1;
1.61 harris41 1438: }
1.98 harris41 1439: else {
1440: return 0;
1.61 harris41 1441: }
1.60 harris41 1442: }
1443:
1.98 harris41 1444: # ---------------- Message to output when there are not enough fields filled in
1445: sub output_blank_field_error {
1446: my ($r)=@_;
1447: # make query information persistent to allow for subsequent revision
1448: my $persistent=&make_persistent();
1449:
1450: $r->print(<<BEGINNING);
1451: <html>
1452: <head>
1453: <title>The LearningOnline Network with CAPA</title>
1454: BEGINNING
1455: $r->print(<<RESULTS);
1456: </head>
1457: <body bgcolor="#ffffff">
1458: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1459: <h1>Search Catalog</h1>
1460: <form method="post" action="/adm/searchcat">
1461: $persistent
1462: <input type='button' value='Revise search request'
1463: onClick='this.form.submit();' />
1464: $closebutton
1465: <hr />
1466: <h3>Helpful Message</h3>
1467: <p>
1468: Incorrect search query due to blank entry fields.
1469: You need to fill in the relevant
1470: fields on the search page in order for a query to be
1471: processed.
1472: </p>
1473: </body>
1474: </html>
1475: RESULTS
1476: }
1477:
1478: # ----------------------------------------------------------- Output date error
1.60 harris41 1479: sub output_date_error {
1480: my ($r,$message)=@_;
1481: # make query information persistent to allow for subsequent revision
1.65 harris41 1482: my $persistent=&make_persistent();
1.60 harris41 1483:
1484: $r->print(<<BEGINNING);
1485: <html>
1486: <head>
1487: <title>The LearningOnline Network with CAPA</title>
1488: BEGINNING
1489: $r->print(<<RESULTS);
1490: </head>
1491: <body bgcolor="#ffffff">
1.98 harris41 1492: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1.60 harris41 1493: <h1>Search Catalog</h1>
1494: <form method="post" action="/adm/searchcat">
1495: $persistent
1496: <input type='button' value='Revise search request'
1.98 harris41 1497: onClick='this.form.submit();' />
1.60 harris41 1498: $closebutton
1.98 harris41 1499: <hr />
1.60 harris41 1500: <h3>Helpful Message</h3>
1501: <p>
1502: $message
1503: </p>
1504: </body>
1505: </html>
1506: RESULTS
1.101 harris41 1507: }
1508:
1.104 harris41 1509: # --------- settings whenever the user causes the search window to be launched
1.101 harris41 1510: sub start_fresh_session {
1511: delete $hash{'mode_catalog'};
1.109 harris41 1512: foreach (keys %hash) {
1.101 harris41 1513: if ($_ =~ /^pre_/) {
1514: delete $hash{$_};
1515: }
1516: if ($_ =~ /^store/) {
1517: delete $hash{$_};
1518: }
1.109 harris41 1519: }
1.3 harris41 1520: }
1.1 www 1521:
1522: 1;
1.98 harris41 1523:
1.1 www 1524: __END__
1.105 harris41 1525:
1526: =head1 NAME
1527:
1528: Apache::lonsearchcat - mod_perl module for handling a searchable catalog
1529:
1530: =head1 SYNOPSIS
1531:
1532: Invoked by /etc/httpd/conf/srm.conf:
1533:
1534: <Location /adm/searchcat>
1535: PerlAccessHandler Apache::lonacc
1536: SetHandler perl-script
1537: PerlHandler Apache::lonsearchcat
1538: ErrorDocument 403 /adm/login
1539: ErrorDocument 500 /adm/errorhandler
1540: </Location>
1541:
1542: =head1 INTRODUCTION
1543:
1544: This module enables searching for a distributed browseable catalog.
1545:
1546: This is part of the LearningOnline Network with CAPA project
1547: described at http://www.lon-capa.org.
1548:
1549: =head1 BEGIN SUBROUTINE
1550:
1551: This routine is only run once after compilation.
1552:
1553: =over 4
1554:
1555: =item *
1556:
1557: Initializes %hostdomains and hostips hash table (for hosts.tab).
1558:
1559: =back
1560:
1561: =head1 HANDLER SUBROUTINE
1562:
1563: This routine is called by Apache and mod_perl.
1564:
1565: =over 4
1566:
1567: =item *
1568:
1569: configure dynamic components of interface
1570:
1571: =item *
1572:
1573: determine current user
1574:
1575: =item *
1576:
1577: see if a search invocation should be done
1578:
1579: =item *
1580:
1581: else, begin building search interface to output
1582:
1583: =item *
1584:
1585: compute date selection boxes
1586:
1587: =item *
1588:
1589: compute customized metadata field
1590:
1591: =item *
1592:
1593: print screen
1594:
1595: =back
1596:
1597: =head1 OTHER SUBROUTINES
1598:
1599: =over 4
1600:
1601: =item *
1602:
1603: get_unprocessed_cgi() : reads in critical name/value pairs that may have not
1604: been processed and passed into %ENV by the web server
1605:
1606: =item *
1607:
1608: make_persistent() : makes a set of hidden HTML fields to make
1609: SQL search interface information to be persistent
1610:
1611: =back
1612:
1613: WEB INTERFACE COMPONENT FUNCTIONS
1614:
1615: =over 4
1616:
1617: =item *
1618:
1619: simpletextfield(name,value) : returns HTML formatted string for simple text
1620: field
1621:
1622: =item *
1623:
1624: simplecheckbox(name,value) : returns HTML formatted string for simple
1625: checkbox
1626:
1627: =item *
1628:
1629: searchphrasefield(title,name,value) : returns HTML formatted string for
1630: a search expression phrase field
1631:
1632: =item *
1633:
1634: dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
1635: formatted string for a calendar date
1636:
1637: =item *
1638:
1639: selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
1640: a selection box field
1641:
1642: =back
1643:
1644: SEARCH FUNCTIONS
1645:
1646: =over 4
1647:
1648: =item *
1649:
1650: advancedsearch(server reference, environment reference) : perform a complex
1651: multi-field logical query
1652:
1653: =item *
1654:
1655: basicsearch(server reference, environment reference) : perform a simple
1656: single-field logical query
1657:
1658: =item *
1659:
1660: build_SQL_query(field name, logic) : builds a SQL query string from a
1661: logical expression with AND/OR keywords
1662:
1663: =item *
1664:
1665: build_custommetadata_query(field_name, logic_statement) : builds a perl
1666: regular expression from a logical expression with AND/OR keywords
1667:
1668: =item *
1669:
1670: recursive_SQL_query_build(field name, reverse notation expression) :
1671: builds a SQL query string from a reverse notation expression
1672: logical expression with AND/OR keywords
1673:
1674: =item *
1675:
1676: build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2,
1677: lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) :
1678: Builds a SQL logic query to check time/date entries.
1679:
1680: =back
1681:
1682: OUTPUTTING RESULTS FUNCTION
1683:
1684: =over 4
1685:
1686: =item *
1687:
1688: output_results(output mode, server reference, environment reference,
1689: reply list reference) : outputs results from search
1690:
1691: =back
1692:
1693: DIFFERENT WAYS TO VIEW METADATA RECORDS
1694:
1695: =over 4
1696:
1697: =item *
1698:
1699: detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1700: see metadata viewing notes below
1701:
1702: =item *
1703:
1704: summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1705: see metadata viewing notes below
1706:
1707: =item *
1708:
1709: fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1710: see metadata viewing notes below
1711:
1712: =item *
1713:
1714: xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
1715: see metadata viewing notes below
1716:
1717: =back
1718:
1719: _____________________________________________________________________
1720: | * Metadata viewing notes |
1721: | Output is a HTML-ified string. |
1722: | Input arguments are title, author, subject, url, keywords, version, |
1723: | notes, short abstract, mime, language, creation date, |
1724: | last revision date, owner, copyright, hostname, httphost, and |
1725: | extra custom metadata to show. |
1726: ---------------------------------------------------------------------
1727:
1728: TEST CONDITIONAL FUNCTIONS
1729:
1730: =over 4
1731:
1732: =item *
1733:
1734: filled(field) : determines whether a given field has been filled
1735:
1736: =back
1737:
1738: ERROR FUNCTIONS
1739:
1740: =over 4
1741:
1742: =item *
1743:
1744: output_blank_field_error(server reference) : outputs a message saying that
1745: more fields need to be filled in
1746:
1747: =item *
1748:
1749: output_date_error(server reference, error message) : outputs
1750: an error message specific to bad date format.
1751:
1752: =back
1753:
1754: =cut
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