1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.208 2004/04/19 14:42:24 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77:
78: ######################################################################
79: ######################################################################
80: ##
81: ## Global variables
82: ##
83: ######################################################################
84: ######################################################################
85: my %groupsearch_db; # Database hash used to save values for the
86: # groupsearch RAT interface.
87: my %persistent_db; # gdbm hash which holds data which is supposed to
88: # persist across calls to lonsearchcat.pm
89:
90: # The different view modes and associated functions
91:
92: my %Views = ("detailed" => \&detailed_citation_view,
93: "summary" => \&summary_view,
94: "fielded" => \&fielded_format_view,
95: "xml" => \&xml_sgml_view,
96: "compact" => \&compact_view);
97:
98: ######################################################################
99: ######################################################################
100: sub handler {
101: my $r = shift;
102: # &set_defaults();
103: #
104: # set form defaults
105: #
106: my $hidden_fields;# Hold all the hidden fields used to keep track
107: # of the search system state
108: my $importbutton; # button to take the selected results and go to group
109: # sorting
110: my $diropendb; # The full path to the (temporary) search database file.
111: # This is set and used in &handler() and is also used in
112: # &output_results().
113: my $bodytag; # LON-CAPA standard body tag, gotten from
114: # &Apache::lonnet::bodytag.
115: # No title, no table, just a <body> tag.
116:
117: my $loaderror=&Apache::lonnet::overloaderror($r);
118: if ($loaderror) { return $loaderror; }
119:
120: my $closebutton; # button that closes the search window
121: # This button is different for the RAT compared to
122: # normal invocation.
123: #
124: &Apache::loncommon::content_type($r,'text/html');
125: $r->send_http_header;
126: return OK if $r->header_only;
127: ##
128: ## Prevent caching of the search interface window. Hopefully this means
129: ## we will get the launch=1 passed in a little more.
130: &Apache::loncommon::no_cache($r);
131: ##
132: ## Pick up form fields passed in the links.
133: ##
134: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
135: ['catalogmode','launch','acts','mode','form','element','pause',
136: 'phase','persistent_db_id','table','start','show',
137: 'cleargroupsort','titleelement']);
138: ##
139: ## The following is a trick - we wait a few seconds if asked to so
140: ## the daemon running the search can get ahead of the daemon
141: ## printing the results. We only need (theoretically) to do
142: ## this once, so the pause indicator is deleted
143: ##
144: if (exists($ENV{'form.pause'})) {
145: sleep(1);
146: delete($ENV{'form.pause'});
147: }
148: ##
149: ## Initialize global variables
150: ##
151: my $domain = $r->dir_config('lonDefDomain');
152: $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
153: #
154: # set the name of the persistent database
155: # $ENV{'form.persistent_db_id'} can only have digits in it.
156: if (! exists($ENV{'form.persistent_db_id'}) ||
157: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
158: ($ENV{'form.launch'} eq '1')) {
159: $ENV{'form.persistent_db_id'} = time;
160: }
161: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
162: my $persistent_db_file = "/home/httpd/perl/tmp/".
163: &Apache::lonnet::escape($domain).
164: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
165: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
166: ##
167: if (! &get_persistent_form_data($persistent_db_file)) {
168: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
169: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
170: "from $persistent_db_file");
171: $r->print(<<END);
172: <html>
173: <head><title>LON-CAPA Search Error</title></head>
174: $bodytag
175: We were unable to retrieve data describing your search. This is a serious
176: error and has been logged. Please alert your LON-CAPA administrator.
177: </body>
178: </html>
179: END
180: return OK;
181: }
182: }
183: ##
184: ## Clear out old values from groupsearch database
185: ##
186: untie %groupsearch_db if (tied(%groupsearch_db));
187: if (($ENV{'form.cleargroupsort'} eq '1') ||
188: (($ENV{'form.launch'} eq '1') &&
189: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
190: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
191: &start_fresh_session();
192: untie %groupsearch_db;
193: delete($ENV{'form.cleargroupsort'});
194: } else {
195: # This is a stupid error to give to the user.
196: # It really tells them nothing.
197: $r->print('<html><head></head>'.$bodytag.
198: 'Unable to tie hash to db file</body></html>');
199: return OK;
200: }
201: }
202: ##
203: ## Configure hidden fields
204: ##
205: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
206: $ENV{'form.persistent_db_id'}.'" />'."\n";
207: if (exists($ENV{'form.catalogmode'})) {
208: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
209: $ENV{'form.catalogmode'}.'" />'."\n";
210: }
211: if (exists($ENV{'form.form'})) {
212: $hidden_fields .= '<input type="hidden" name="form" value="'.
213: $ENV{'form.form'}.'" />'."\n";
214: }
215: if (exists($ENV{'form.element'})) {
216: $hidden_fields .= '<input type="hidden" name="element" value="'.
217: $ENV{'form.element'}.'" />'."\n";
218: }
219: if (exists($ENV{'form.titleelement'})) {
220: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
221: $ENV{'form.titleelement'}.'" />'."\n";
222: }
223: if (exists($ENV{'form.mode'})) {
224: $hidden_fields .= '<input type="hidden" name="mode" value="'.
225: $ENV{'form.mode'}.'" />'."\n";
226: }
227: ##
228: ## Configure dynamic components of interface
229: ##
230: if ($ENV{'form.catalogmode'} eq 'interactive') {
231: $closebutton="<input type='button' name='close' value='CLOSE' ";
232: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
233: $closebutton .="onClick='parent.close()'";
234: } else {
235: $closebutton .="onClick='self.close()'";
236: }
237: $closebutton .=">\n";
238: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
239: $closebutton="<input type='button' name='close' value='CLOSE' ";
240: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
241: $closebutton .="onClick='parent.close()'";
242: } else {
243: $closebutton .="onClick='self.close()'";
244: }
245: $closebutton .= ">";
246: $importbutton=<<END;
247: <input type='button' name='import' value='IMPORT'
248: onClick='javascript:select_group()'>
249: END
250: } else {
251: $closebutton = '';
252: $importbutton = '';
253: }
254: ##
255: ## Sanity checks on form elements
256: ##
257: if (!defined($ENV{'form.viewselect'})) {
258: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
259: ($ENV{'form.catalogmode'} eq 'interactive')) {
260: $ENV{'form.viewselect'} ="Compact View";
261: } else {
262: $ENV{'form.viewselect'} ="Detailed Citation View";
263: }
264: }
265: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
266: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
267: ##
268: ## Switch on the phase
269: ##
270: if ($ENV{'form.phase'} eq 'disp_basic') {
271: &print_basic_search_form($r,$closebutton,$hidden_fields);
272: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
273: &print_advanced_search_form($r,$closebutton,$hidden_fields);
274: } elsif ($ENV{'form.phase'} eq 'results') {
275: &display_results($r,$importbutton,$closebutton,$diropendb);
276: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
277: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
278: &get_persistent_data($persistent_db_file,
279: ['query','customquery','customshow',
280: 'libraries','pretty_string']);
281: if ($ENV{'form.phase'} eq 'sort') {
282: &print_sort_form($r,$pretty_string);
283: } elsif ($ENV{'form.phase'} eq 'run_search') {
284: &run_search($r,$query,$customquery,$customshow,
285: $libraries,$pretty_string);
286: }
287: } elsif ($ENV{'form.phase'} eq 'course_search') {
288: &course_search($r);
289: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
290: ($ENV{'form.phase'} eq 'adv_search')) {
291: $ENV{'form.searchmode'} = 'basic';
292: if ($ENV{'form.phase'} eq 'adv_search') {
293: $ENV{'form.searchmode'} = 'advanced';
294: }
295: # Set up table
296: if (! defined(&create_results_table())) {
297: my $errorstring=&Apache::lonmysql::get_error();
298: $r->print(<<END);
299: <html><head><title>Search Error</title></head>
300: $bodytag
301: Unable to create table in which to store search results.
302: The search has been aborted.
303: <br />$errorstring
304: </body>
305: </html>
306: END
307: return OK;
308: }
309: delete($ENV{'form.launch'});
310: if (! &make_form_data_persistent($r,$persistent_db_file)) {
311: $r->print(<<END);
312: <html><head><title>Search Error</title></head>
313: $bodytag
314: Unable to properly store search information. The search has been aborted.
315: </body>
316: </html>
317: END
318: return OK;
319: }
320: #
321: # We are running a search
322: my ($query,$customquery,$customshow,$libraries) =
323: (undef,undef,undef,undef);
324: my $pretty_string;
325: if ($ENV{'form.phase'} eq 'basic_search') {
326: ($query,$pretty_string,$libraries) =
327: &parse_basic_search($r,$closebutton,$hidden_fields);
328: } else { # Advanced search
329: ($query,$customquery,$customshow,$libraries,$pretty_string)
330: = &parse_advanced_search($r,$closebutton,$hidden_fields);
331: return OK if (! defined($query));
332: }
333: &make_persistent({ query => $query,
334: customquery => $customquery,
335: customshow => $customshow,
336: libraries => $libraries,
337: pretty_string => $pretty_string },
338: $persistent_db_file);
339: ##
340: ## Print out the frames interface
341: ##
342: &print_frames_interface($r);
343: }
344: return OK;
345: }
346:
347: ######################################################################
348: ######################################################################
349: ##
350: ## Course Search
351: ##
352: ######################################################################
353: ######################################################################
354: { # Scope the course search to avoid global variables
355: #
356: # Variables For course search
357: my %alreadyseen;
358: my %hash;
359: my $totalfound;
360:
361: sub course_search {
362: my $r=shift;
363: my $bodytag=&Apache::loncommon::bodytag('Course Search').
364: &Apache::loncommon::help_open_bug('Searching');
365: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
366: my $search_string = $ENV{'form.courseexp'};
367: my @New_Words;
368: if ($ENV{'form.crsrelated'}) {
369: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
370: if (@New_Words) {
371: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
372: } else {
373: $pretty_search_string .= ' '.&mt('with no related words').".";
374: }
375: }
376: my $fulltext=$ENV{'form.crsfulltext'};
377: my @allwords=($search_string,@New_Words);
378: $totalfound=0;
379: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
380: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
381: $r->rflush();
382: # ======================================================= Go through the course
383: undef %alreadyseen;
384: %alreadyseen=();
385: my $c=$r->connection;
386: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
387: &GDBM_READER(),0640)) {
388: foreach (keys %hash) {
389: if ($c->aborted()) { last; }
390: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
391: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
392: @allwords);
393: }
394: }
395: untie(%hash);
396: }
397: unless ($totalfound) {
398: $r->print('<p>'.&mt('No resources found').'.</p>');
399: }
400: # =================================================== Done going through course
401: $r->print('</body></html>');
402: }
403:
404: # =============================== This pulls up a resource and its dependencies
405:
406: sub checkonthis {
407: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
408: $alreadyseen{$url}=1;
409: $r->rflush();
410: my $result=&Apache::lonnet::metadata($url,'title').' '.
411: &Apache::lonnet::metadata($url,'subject').' '.
412: &Apache::lonnet::metadata($url,'abstract').' '.
413: &Apache::lonnet::metadata($url,'keywords');
414: if (($url) && ($fulltext)) {
415: $result.=&Apache::lonnet::ssi_body($url);
416: }
417: $result=~s/\s+/ /gs;
418: my $applies=0;
419: foreach (@allwords) {
420: if ($_=~/\w/) {
421: if ($result=~/$_/si) {
422: $applies++;
423: }
424: }
425: }
426: # Does this resource apply?
427: if ($applies) {
428: $r->print('<br />');
429: for (my $i=0;$i<=$level*5;$i++) {
430: $r->print(' ');
431: }
432: $r->print('<a href="'.$url.'" target="cat">'.
433: ($title?$title:$url).'</a><br />');
434: $totalfound++;
435: } elsif ($fulltext) {
436: $r->print(' .');
437: }
438: $r->rflush();
439: # Check also the dependencies of this one
440: my $dependencies=
441: &Apache::lonnet::metadata($url,'dependencies');
442: foreach (split(/\,/,$dependencies)) {
443: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
444: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
445: }
446: }
447: }
448:
449: sub untiehash {
450: if (tied(%hash)) {
451: untie(%hash);
452: }
453: }
454:
455: } # End of course search scoping
456:
457: sub search_html_header {
458: my $Str = <<ENDHEADER;
459: <html>
460: <head>
461: <title>The LearningOnline Network with CAPA</title>
462: <script type="text/javascript">
463: function openhelp(val) {
464: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
465: 'scrollbars=1,width=600,height=300');
466: openhelpwin.focus();
467: }
468: </script>
469: </head>
470: ENDHEADER
471: return $Str;
472: }
473:
474: ######################################################################
475: ######################################################################
476:
477: =pod
478:
479: =item &print_basic_search_form()
480:
481: Prints the form for the basic search. Sorry the name is so cryptic.
482:
483: =cut
484:
485: ######################################################################
486: ######################################################################
487: sub print_basic_search_form {
488: my ($r,$closebutton,$hidden_fields) = @_;
489: my $bodytag=&Apache::loncommon::bodytag('Search').
490: &Apache::loncommon::help_open_topic('Finding_Resources').
491: &Apache::loncommon::help_open_bug('Searching');
492: my $scrout = &search_html_header().$bodytag;
493: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
494: my $CatalogSearch=&mt('Catalog Search');
495: my $Statement=&searchhelp();
496: $scrout.=(<<ENDDOCUMENT);
497: <h1>$CatalogSearch</h1>
498: <form name="loncapa_search" method="post" action="/adm/searchcat">
499: <input type="hidden" name="phase" value="basic_search" />
500: $hidden_fields
501: <p>
502: $Statement.
503: </p>
504: <p>
505: <table>
506: <tr><td>
507: ENDDOCUMENT
508: $scrout.=' '.
509: &Apache::lonhtmlcommon::textbox('basicexp',
510: $ENV{'form.basicexp'},40).
511: ' ';
512: my $relatedcheckbox =
513: &Apache::lonhtmlcommon::checkbox('related',
514: $ENV{'form.related'});
515: my $domain = $r->dir_config('lonDefDomain');
516: my $domaincheckbox =
517: &Apache::lonhtmlcommon::checkbox('domains',
518: $ENV{'form.domains'});
519: my $srch=&mt('Search');
520: my $header=&mt('Advanced Search');
521: my $userelatedwords=&mt('use related words');
522: my $onlysearchdomain=&mt('only search domain');
523: my $view=&viewoptions();
524: $scrout.=<<END;
525: </td><td><a
526: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
527: >$header</a></td></tr>
528: <tr><td>$relatedcheckbox $userelatedwords</td>
529: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
530: </table>
531: </p>
532: $view
533: <p>
534: <input type="submit" name="basicsubmit" value='$srch' />
535: $closebutton
536: END
537: $scrout.=<<ENDDOCUMENT;
538: </p>
539: </form>
540: ENDDOCUMENT
541: }
542: if ($ENV{'request.course.id'}) {
543: my %lt=&Apache::lonlocal::texthash(
544: 'srch' => 'Search',
545: 'header' => 'Course Search',
546: 'note' => 'Enter terms or phrases, then press "Search" below',
547: 'use' => 'use related words',
548: 'full' =>'fulltext search (time consuming)'
549: );
550: $scrout.=(<<ENDCOURSESEARCH);
551: <hr />
552: <h1>$lt{'header'}</h1>
553: <form name="course_search" method="post" action="/adm/searchcat">
554: <input type="hidden" name="phase" value="course_search" />
555: $hidden_fields
556: <p>
557: $lt{'note'}.
558: </p>
559: <p>
560: <table>
561: <tr><td>
562: ENDCOURSESEARCH
563: $scrout.=' '.
564: &Apache::lonhtmlcommon::textbox('courseexp',
565: $ENV{'form.courseexp'},40);
566: my $crscheckbox =
567: &Apache::lonhtmlcommon::checkbox('crsfulltext',
568: $ENV{'form.crsfulltext'});
569: my $relcheckbox =
570: &Apache::lonhtmlcommon::checkbox('crsrelated',
571: $ENV{'form.crsrelated'});
572: $scrout.=(<<ENDENDCOURSE);
573: </td></tr>
574: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
575: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
576: </table><p>
577: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
578: </p>
579: ENDENDCOURSE
580: }
581: $scrout.=(<<ENDDOCUMENT);
582: </body>
583: </html>
584: ENDDOCUMENT
585: $r->print($scrout);
586: return;
587: }
588: ######################################################################
589: ######################################################################
590:
591: =pod
592:
593: =item &advanced_search_form()
594:
595: Prints the advanced search form.
596:
597: =cut
598:
599: ######################################################################
600: ######################################################################
601: sub print_advanced_search_form{
602: my ($r,$closebutton,$hidden_fields) = @_;
603: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
604: 'reset' => 'Reset',
605: 'help' => 'Help');
606: my $advanced_buttons = <<"END";
607: <p>
608: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
609: <input type="reset" name="reset" value='$lt{"reset"}' />
610: $closebutton
611: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
612: END
613: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
614: my $searchhelp=&searchhelp();
615: my $scrout=&search_html_header();
616: $scrout .= <<"ENDHEADER";
617: $bodytag
618: <form method="post" action="/adm/searchcat" name="advsearch">
619: $advanced_buttons
620: ENDHEADER
621: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
622: '<input type="hidden" name="phase" value="adv_search" />';
623: my %fields=&Apache::lonmeta::fieldnames();
624: #
625: $scrout.= '<p>'.$searchhelp.'</p>'.
626: "<table>\n";
627: my %related_word_search =
628: ('title'=>1,
629: 'author'=>0,
630: 'owner'=>0,
631: 'authorspace'=>0,
632: 'modifyinguser'=>0,
633: 'keywords'=>1,
634: 'notes'=>1,
635: 'abstract'=>1,
636: 'standards'=>1,
637: 'mime'=>1,
638: );
639:
640: foreach my $field ('title','author','owner','authorspace','modifyinguser',
641: 'keywords','notes','abstract','standards','mime') {
642: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
643: &Apache::lonmeta::prettyinput($field,
644: $ENV{'form.'.$field},
645: $field,
646: 'advsearch',
647: $related_word_search{$field},
648: '</td><td align="left">',
649: $ENV{'form.'.$field.'_related'},
650: 50);
651: if ($related_word_search{$field}) {
652: $scrout .= 'related words';
653: } else {
654: $scrout .= '</td><td> ';
655: }
656: $scrout .= '</td></tr>'.$/;
657: }
658: foreach my $field ('lowestgradelevel','highestgradelevel') {
659: $scrout.='<tr>'.
660: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
661: '<td colspan="2">'.
662: &Apache::lonmeta::prettyinput($field,
663: $ENV{'form.'.$field},
664: $field,
665: 'advsearch',
666: 0).
667: '</td></tr>'.$/;
668: }
669: $scrout.='<tr><td align="right">'.
670: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
671: &Apache::loncommon::filecategoryselect('category',
672: $ENV{'form.category'}).
673: '</td></tr>'.$/;
674: $scrout.='<tr><td align="right" valign="top">'.
675: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
676: &Apache::loncommon::domain_select('domains',
677: $ENV{'form.domains'},1).
678: '</td></tr>'.$/;
679: $scrout .= "</table>\n<br />\n<table>\n";
680: my %dates=&Apache::lonlocal::texthash
681: ('creationdatestart' => 'Creation Date After',
682: 'creationdateend' => 'Creation Date Before',
683: 'lastrevisiondatestart' => 'Last Revision Date After',
684: 'lastrevisiondateend' => 'Last Revision Date Before');
685: foreach my $field (sort keys %dates) {
686: $scrout.='<tr>'.
687: '<td align="right">'.&titlefield($dates{$field}).'</td><td>'.
688: &Apache::lonhtmlcommon::date_setter('advsearch',$field,0,'',1).
689: '</td></tr>'.$/;
690: }
691: $scrout.="</table>\n";
692: $scrout.=<<ENDDOCUMENT;
693: $advanced_buttons
694: </form>
695: </body>
696: </html>
697: ENDDOCUMENT
698: $r->print($scrout);
699: return;
700: }
701:
702: ######################################################################
703: ######################################################################
704:
705: =pod
706:
707: =item &titlefield()
708:
709: Inputs: title text
710:
711: Outputs: titletext with font wrapper
712:
713: =cut
714:
715: ######################################################################
716: ######################################################################
717: sub titlefield {
718: my $title=shift;
719: return $title;
720: }
721:
722: ######################################################################
723: ######################################################################
724:
725: =pod
726:
727: =item viewoptiontext()
728:
729: Inputs: codename for view option
730:
731: Outputs: displayed text
732:
733: =cut
734:
735: ######################################################################
736: ######################################################################
737: sub viewoptiontext {
738: my $code=shift;
739: my %desc=&Apache::lonlocal::texthash
740: ('detailed' => "Detailed Citation View",
741: 'xml' => 'XML/SGML',
742: 'compact' => 'Compact View',
743: 'fielded' => 'Fielded Format',
744: 'summary' => 'Summary View');
745: return $desc{$code};
746: }
747:
748: ######################################################################
749: ######################################################################
750:
751: =pod
752:
753: =item viewoptions()
754:
755: Inputs: none
756:
757: Outputs: text for box with view options
758:
759: =cut
760:
761: ######################################################################
762: ######################################################################
763: sub viewoptions {
764: my $scrout="\n".'<nobr>';
765: if (! defined($ENV{'form.viewselect'})) {
766: $ENV{'form.viewselect'}='detailed';
767: }
768: $scrout.=&Apache::lonmeta::selectbox('viewselect',
769: $ENV{'form.viewselect'},
770: \&viewoptiontext,
771: sort(keys(%Views)));
772: $scrout.= ' ';
773: $scrout.=&Apache::lonmeta::selectbox('show',
774: $ENV{'form.show'},
775: undef,
776: (10,20,50,100,1000,10000));
777: $scrout .= (' 'x2).&mt('Records per Page').'</nobr>'.$/;
778: return $scrout;
779: }
780:
781: ######################################################################
782: ######################################################################
783:
784: =pod
785:
786: =item searchhelp()
787:
788: Inputs: none
789:
790: Outputs: return little blurb on how to enter searches
791:
792: =cut
793:
794: ######################################################################
795: ######################################################################
796: sub searchhelp {
797: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
798: }
799:
800: ######################################################################
801: ######################################################################
802:
803: =pod
804:
805: =item &get_persistent_form_data()
806:
807: Inputs: filename of database
808:
809: Outputs: returns undef on database errors.
810:
811: This function is the reverse of &make_persistent() for form data.
812: Retrieve persistent data from %persistent_db. Retrieved items will have their
813: values unescaped. If a form value already exists in $ENV, it will not be
814: overwritten. Form values that are array references may have values appended
815: to them.
816:
817: =cut
818:
819: ######################################################################
820: ######################################################################
821: sub get_persistent_form_data {
822: my $filename = shift;
823: return 0 if (! -e $filename);
824: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
825: &GDBM_READER(),0640));
826: #
827: # These make sure we do not get array references printed out as 'values'.
828: my %arrays_allowed = ('form.domains'=>1);
829: #
830: # Loop through the keys, looking for 'form.'
831: foreach my $name (keys(%persistent_db)) {
832: next if ($name !~ /^form./);
833: # Kludgification begins!
834: if ($name eq 'form.domains' &&
835: $ENV{'form.searchmode'} eq 'basic' &&
836: $ENV{'form.phase'} ne 'disp_basic') {
837: next;
838: }
839: # End kludge (hopefully)
840: next if (exists($ENV{$name}));
841: my @values = map {
842: &Apache::lonnet::unescape($_);
843: } split(',',$persistent_db{$name});
844: next if (@values <1);
845: if ($arrays_allowed{$name}) {
846: $ENV{$name} = [@values];
847: } else {
848: $ENV{$name} = $values[0] if ($values[0]);
849: }
850: }
851: untie (%persistent_db);
852: return 1;
853: }
854:
855: ######################################################################
856: ######################################################################
857:
858: =pod
859:
860: =item &get_persistent_data()
861:
862: Inputs: filename of database, ref to array of values to recover.
863:
864: Outputs: array of values. Returns undef on error.
865:
866: This function is the reverse of &make_persistent();
867: Retrieve persistent data from %persistent_db. Retrieved items will have their
868: values unescaped. If the item contains commas (before unescaping), the
869: returned value will be an array pointer.
870:
871: =cut
872:
873: ######################################################################
874: ######################################################################
875: sub get_persistent_data {
876: my $filename = shift;
877: my @Vars = @{shift()};
878: my @Values; # Return array
879: return undef if (! -e $filename);
880: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
881: &GDBM_READER(),0640));
882: foreach my $name (@Vars) {
883: if (! exists($persistent_db{$name})) {
884: push @Values, undef;
885: next;
886: }
887: my @values = map {
888: &Apache::lonnet::unescape($_);
889: } split(',',$persistent_db{$name});
890: if (@values <= 1) {
891: push @Values,$values[0];
892: } else {
893: push @Values,\@values;
894: }
895: }
896: untie (%persistent_db);
897: return @Values;
898: }
899:
900: ######################################################################
901: ######################################################################
902:
903: =pod
904:
905: =item &make_persistent()
906:
907: Inputs: Hash of values to save, filename of persistent database.
908:
909: Store variables away to the %persistent_db.
910: Values will be escaped. Values that are array pointers will have their
911: elements escaped and concatenated in a comma separated string.
912:
913: =cut
914:
915: ######################################################################
916: ######################################################################
917: sub make_persistent {
918: my %save = %{shift()};
919: my $filename = shift;
920: return undef if (! tie(%persistent_db,'GDBM_File',
921: $filename,&GDBM_WRCREAT(),0640));
922: foreach my $name (keys(%save)) {
923: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
924: # We handle array references, but not recursively.
925: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
926: $persistent_db{$name} = $store;
927: }
928: untie(%persistent_db);
929: return 1;
930: }
931:
932: ######################################################################
933: ######################################################################
934:
935: =pod
936:
937: =item &make_form_data_persistent()
938:
939: Inputs: filename of persistent database.
940:
941: Store most form variables away to the %persistent_db.
942: Values will be escaped. Values that are array pointers will have their
943: elements escaped and concatenated in a comma separated string.
944:
945: =cut
946:
947: ######################################################################
948: ######################################################################
949: sub make_form_data_persistent {
950: my $r = shift;
951: my $filename = shift;
952: my %save;
953: foreach (keys(%ENV)) {
954: next if (!/^form/ || /submit/);
955: $save{$_} = $ENV{$_};
956: }
957: return &make_persistent(\%save,$filename);
958: }
959:
960: ######################################################################
961: ######################################################################
962:
963: =pod
964:
965: =item &parse_advanced_search()
966:
967: Parse advanced search form and return the following:
968:
969: =over 4
970:
971: =item $query Scalar containing an SQL query.
972:
973: =item $customquery Scalar containing a custom query.
974:
975: =item $customshow Scalar containing commands to show custom metadata.
976:
977: =item $libraries_to_query Reference to array of domains to search.
978:
979: =back
980:
981: =cut
982:
983: ######################################################################
984: ######################################################################
985: sub parse_advanced_search {
986: my ($r,$closebutton,$hidden_fields)=@_;
987: my $fillflag=0;
988: my $pretty_search_string = "<br />\n";
989: # Clean up fields for safety
990: for my $field ('title','author','subject','keywords','url','version',
991: 'creationdatestart_month','creationdatestart_day',
992: 'creationdatestart_year','creationdateend_month',
993: 'creationdateend_day','creationdateend_year',
994: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
995: 'lastrevisiondatestart_year','lastrevisiondateend_month',
996: 'lastrevisiondateend_day','lastrevisiondateend_year',
997: 'notes','abstract','extension','language','owner',
998: 'custommetadata','customshow','category') {
999: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1000: }
1001: foreach ('mode','form','element') {
1002: # is this required? Hmmm.
1003: next unless (exists($ENV{"form.$_"}));
1004: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1005: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1006: }
1007: # Preprocess the category form element.
1008: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1009: ref($ENV{'form.category'}));
1010: #
1011: # Check to see if enough information was filled in
1012: for my $field ('title','author','subject','keywords','url','version',
1013: 'notes','abstract','category','extension','language',
1014: 'owner','custommetadata') {
1015: if (&filled($ENV{"form.$field"})) {
1016: $fillflag++;
1017: }
1018: }
1019: unless ($fillflag) {
1020: &output_blank_field_error($r,$closebutton,
1021: 'phase=disp_adv',$hidden_fields);
1022: return ;
1023: }
1024: # Turn the form input into a SQL-based query
1025: my $query='';
1026: my @queries;
1027: my $font = '<font color="#800000" face="helvetica">';
1028: # Evaluate logical expression AND/OR/NOT phrase fields.
1029: foreach my $field ('title','author','subject','notes','abstract','url',
1030: 'keywords','version','owner','standards') {
1031: if ($ENV{'form.'.$field}) {
1032: my $searchphrase = $ENV{'form.'.$field};
1033: $pretty_search_string .= $font."$field</font> contains <b>".
1034: $searchphrase."</b>";
1035: if ($ENV{'form.'.$field.'_related'}) {
1036: my @New_Words;
1037: ($searchphrase,@New_Words) = &related_version($searchphrase);
1038: if (@New_Words) {
1039: $pretty_search_string .= " with related words: ".
1040: "<b>@New_Words</b>.";
1041: } else {
1042: $pretty_search_string .= " with no related words.";
1043: }
1044: }
1045: $pretty_search_string .= "<br />\n";
1046: push @queries,&build_SQL_query($field,$searchphrase);
1047: }
1048: }
1049: #
1050: # Make the 'mime' from 'form.category' and 'form.extension'
1051: #
1052: my $searchphrase;
1053: if (exists($ENV{'form.category'}) &&
1054: $ENV{'form.category'} !~ /^\s*$/ &&
1055: $ENV{'form.category'} ne 'any') {
1056: my @extensions = &Apache::loncommon::filecategorytypes
1057: ($ENV{'form.category'});
1058: if (scalar(@extensions) > 0) {
1059: $searchphrase = join(' OR ',@extensions);
1060: }
1061: }
1062: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1063: $searchphrase .= ' OR ' if (defined($searchphrase));
1064: my @extensions = split(/,/,$ENV{'form.extension'});
1065: $searchphrase .= join(' OR ',@extensions);
1066: }
1067: if (defined($searchphrase)) {
1068: push @queries,&build_SQL_query('mime',$searchphrase);
1069: $pretty_search_string .=$font.'mime</font> contains <b>'.
1070: $searchphrase.'</b><br />';
1071: }
1072: #
1073: # Evaluate option lists
1074: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1075: push @queries,"(language like \"$ENV{'form.language'}\")";
1076: $pretty_search_string.=$font."language</font>= ".
1077: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1078: "<br />\n";
1079: }
1080: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1081: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1082: $pretty_search_string.=$font."copyright</font> = ".
1083: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1084: "<br \>\n";
1085: }
1086: #
1087: # Evaluate date windows
1088: my $datequery=&build_date_queries(
1089: $ENV{'form.creationdatestart_month'},
1090: $ENV{'form.creationdatestart_day'},
1091: $ENV{'form.creationdatestart_year'},
1092: $ENV{'form.creationdateend_month'},
1093: $ENV{'form.creationdateend_day'},
1094: $ENV{'form.creationdateend_year'},
1095: $ENV{'form.lastrevisiondatestart_month'},
1096: $ENV{'form.lastrevisiondatestart_day'},
1097: $ENV{'form.lastrevisiondatestart_year'},
1098: $ENV{'form.lastrevisiondateend_month'},
1099: $ENV{'form.lastrevisiondateend_day'},
1100: $ENV{'form.lastrevisiondateend_year'},
1101: );
1102: # Test to see if date windows are legitimate
1103: if ($datequery=~/^Incorrect/) {
1104: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1105: return ;
1106: } elsif ($datequery) {
1107: # Here is where you would set up pretty_search_string to output
1108: # date query information.
1109: push @queries,$datequery;
1110: }
1111: #
1112: # Process form information for custom metadata querying
1113: my $customquery=undef;
1114: ##
1115: ## The custom metadata search was removed q long time ago mostly
1116: ## because I was unable to figureout exactly how it worked and could
1117: ## not imagine people actually using it. MH
1118: ##
1119: # if ($ENV{'form.custommetadata'}) {
1120: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1121: # $ENV{'form.custommetadata'}."</b><br />\n";
1122: # $customquery=&build_custommetadata_query('custommetadata',
1123: # $ENV{'form.custommetadata'});
1124: # }
1125: my $customshow=undef;
1126: # if ($ENV{'form.customshow'}) {
1127: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1128: # $ENV{'form.customshow'}."</b><br />\n";
1129: # $customshow=$ENV{'form.customshow'};
1130: # $customshow=~s/[^\w\s]//g;
1131: # my @fields=split(/\s+/,$customshow);
1132: # $customshow=join(" ",@fields);
1133: # }
1134: ##
1135: ## Deal with restrictions to given domains
1136: ##
1137: my ($libraries_to_query,$pretty_domains_string) =
1138: &parse_domain_restrictions();
1139: $pretty_search_string .= $pretty_domains_string."<br />\n";
1140: #
1141: if (@queries) {
1142: $query=join(" AND ",@queries);
1143: $query="select * from metadata where $query";
1144: } elsif ($customquery) {
1145: $query = '';
1146: }
1147: return ($query,$customquery,$customshow,$libraries_to_query,
1148: $pretty_search_string);
1149: }
1150:
1151: sub parse_domain_restrictions {
1152: my $libraries_to_query = undef;
1153: # $ENV{'form.domains'} can be either a scalar or an array reference.
1154: # We need an array.
1155: if (! exists($ENV{'form.domains'})) {
1156: return (undef,'');
1157: }
1158: my @allowed_domains;
1159: if (ref($ENV{'form.domains'})) {
1160: @allowed_domains = @{$ENV{'form.domains'}};
1161: } else {
1162: @allowed_domains = ($ENV{'form.domains'});
1163: }
1164: #
1165: my %domain_hash = ();
1166: my $pretty_domains_string;
1167: foreach (@allowed_domains) {
1168: $domain_hash{$_}++;
1169: }
1170: if ($domain_hash{'any'}) {
1171: $pretty_domains_string = "In all LON-CAPA domains.";
1172: } else {
1173: if (@allowed_domains > 1) {
1174: $pretty_domains_string = "In LON-CAPA domains:";
1175: } else {
1176: $pretty_domains_string = "In LON-CAPA domain ";
1177: }
1178: foreach (sort @allowed_domains) {
1179: $pretty_domains_string .= "<b>".$_."</b> ";
1180: }
1181: foreach (keys(%Apache::lonnet::libserv)) {
1182: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1183: push @$libraries_to_query,$_;
1184: }
1185: }
1186: }
1187: return ($libraries_to_query,$pretty_domains_string);
1188: }
1189:
1190: ######################################################################
1191: ######################################################################
1192:
1193: =pod
1194:
1195: =item &parse_basic_search()
1196:
1197: Parse the basic search form and return a scalar containing an sql query.
1198:
1199: =cut
1200:
1201: ######################################################################
1202: ######################################################################
1203: sub parse_basic_search {
1204: my ($r,$closebutton)=@_;
1205: #
1206: # Clean up fields for safety
1207: for my $field ('basicexp') {
1208: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1209: }
1210: foreach ('mode','form','element') {
1211: # is this required? Hmmm.
1212: next unless (exists($ENV{"form.$_"}));
1213: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1214: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1215: }
1216: my ($libraries_to_query,$pretty_domains_string) =
1217: &parse_domain_restrictions();
1218: #
1219: # Check to see if enough of a query is filled in
1220: unless (&filled($ENV{'form.basicexp'})) {
1221: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1222: return OK;
1223: }
1224: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1225: my $search_string = $ENV{'form.basicexp'};
1226: if ($ENV{'form.related'}) {
1227: my @New_Words;
1228: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1229: if (@New_Words) {
1230: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1231: } else {
1232: $pretty_search_string .= " with no related words.";
1233: }
1234: }
1235: #
1236: # Build SQL query string based on form page
1237: my $query='';
1238: my $concatarg=join(',',
1239: ('title', 'author', 'subject', 'notes', 'abstract',
1240: 'keywords'));
1241: $concatarg='title' if $ENV{'form.titleonly'};
1242: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1243: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1244: $pretty_search_string .= ' '.$pretty_domains_string;
1245: }
1246: $pretty_search_string .= "<br />\n";
1247: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1248: # &Apache::lonnet::logthis($final_query);
1249: return ($final_query,$pretty_search_string,
1250: $libraries_to_query);
1251: }
1252:
1253: ######################################################################
1254: ######################################################################
1255:
1256: =pod
1257:
1258: =item &related_version()
1259:
1260: Modifies an input string to include related words. Words in the string
1261: are replaced with parenthesized lists of 'OR'd words. For example
1262: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1263:
1264: Note: Using this twice on a string is probably silly.
1265:
1266: =cut
1267:
1268: ######################################################################
1269: ######################################################################
1270: sub related_version {
1271: my $search_string = shift;
1272: my $result = $search_string;
1273: my %New_Words = ();
1274: while ($search_string =~ /(\w+)/cg) {
1275: my $word = $1;
1276: next if (lc($word) =~ /\b(or|and|not)\b/);
1277: my @Words = &Apache::loncommon::get_related_words($word);
1278: @Words = ($#Words>4? @Words[0..4] : @Words);
1279: foreach (@Words) { $New_Words{$_}++;}
1280: my $replacement = join " OR ", ($word,@Words);
1281: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1282: }
1283: return $result,sort(keys(%New_Words));
1284: }
1285:
1286: ######################################################################
1287: ######################################################################
1288:
1289: =pod
1290:
1291: =item &build_SQL_query()
1292:
1293: Builds a SQL query string from a logical expression with AND/OR keywords
1294: using Text::Query and &recursive_SQL_query_builder()
1295:
1296: =cut
1297:
1298: ######################################################################
1299: ######################################################################
1300: sub build_SQL_query {
1301: my ($field_name,$logic_statement)=@_;
1302: my $q=new Text::Query('abc',
1303: -parse => 'Text::Query::ParseAdvanced',
1304: -build => 'Text::Query::Build');
1305: $q->prepare($logic_statement);
1306: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1307: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1308: return $sql_query;
1309: }
1310:
1311: ######################################################################
1312: ######################################################################
1313:
1314: =pod
1315:
1316: =item &build_custommetadata_query()
1317:
1318: Constructs a custom metadata query using a rather heinous regular
1319: expression.
1320:
1321: =cut
1322:
1323: ######################################################################
1324: ######################################################################
1325: sub build_custommetadata_query {
1326: my ($field_name,$logic_statement)=@_;
1327: my $q=new Text::Query('abc',
1328: -parse => 'Text::Query::ParseAdvanced',
1329: -build => 'Text::Query::BuildAdvancedString');
1330: $q->prepare($logic_statement);
1331: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1332: # quick fix to change literal into xml tag-matching
1333: # will eventually have to write a separate builder module
1334: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1335: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1336: /\\<$1\\>?# \<wordone\>
1337: \[\^\\<\]?# [^\<]
1338: \*$2\[\^\\<\]?# *wordtwo[^\<]
1339: \*\\<\\\/$1\\>?# *\<\/wordone\>
1340: /g;
1341: return $matchexp;
1342: }
1343:
1344: ######################################################################
1345: ######################################################################
1346:
1347: =pod
1348:
1349: =item &recursive_SQL_query_build()
1350:
1351: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1352:
1353: =cut
1354:
1355: ######################################################################
1356: ######################################################################
1357: sub recursive_SQL_query_build {
1358: my ($dkey,$pattern)=@_;
1359: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1360: return $pattern unless @matches;
1361: foreach my $match (@matches) {
1362: $match=~/\[ (\w+)\s(.*) \]/;
1363: my ($key,$value)=($1,$2);
1364: my $replacement='';
1365: if ($key eq 'literal') {
1366: $replacement="($dkey LIKE \"\%$value\%\")";
1367: } elsif (lc($key) eq 'not') {
1368: $value=~s/LIKE/NOT LIKE/;
1369: # $replacement="($dkey not like $value)";
1370: $replacement="$value";
1371: } elsif ($key eq 'and') {
1372: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1373: $replacement="($1 AND $2)";
1374: } elsif ($key eq 'or') {
1375: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1376: $replacement="($1 OR $2)";
1377: }
1378: substr($pattern,
1379: index($pattern,$match),
1380: length($match),
1381: $replacement);
1382: }
1383: &recursive_SQL_query_build($dkey,$pattern);
1384: }
1385:
1386: ######################################################################
1387: ######################################################################
1388:
1389: =pod
1390:
1391: =item &build_date_queries()
1392:
1393: Builds a SQL logic query to check time/date entries.
1394: Also reports errors (check for /^Incorrect/).
1395:
1396: =cut
1397:
1398: ######################################################################
1399: ######################################################################
1400: sub build_date_queries {
1401: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1402: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1403: my @queries;
1404: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1405: unless ($cmonth1 and $cday1 and $cyear1 and
1406: $cmonth2 and $cday2 and $cyear2) {
1407: return "Incorrect entry for the creation date. You must specify ".
1408: "a starting month, day, and year and an ending month, ".
1409: "day, and year.";
1410: }
1411: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1412: $cnumeric1+=0;
1413: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1414: $cnumeric2+=0;
1415: if ($cnumeric1>$cnumeric2) {
1416: return "Incorrect entry for the creation date. The starting ".
1417: "date must occur before the ending date.";
1418: }
1419: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1420: "$cyear2-$cmonth2-$cday2 23:59:59')";
1421: push @queries,$cquery;
1422: }
1423: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1424: unless ($lmonth1 and $lday1 and $lyear1 and
1425: $lmonth2 and $lday2 and $lyear2) {
1426: return "Incorrect entry for the last revision date. You must ".
1427: "specify a starting month, day, and year and an ending ".
1428: "month, day, and year.";
1429: }
1430: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1431: $lnumeric1+=0;
1432: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1433: $lnumeric2+=0;
1434: if ($lnumeric1>$lnumeric2) {
1435: return "Incorrect entry for the last revision date. The ".
1436: "starting date must occur before the ending date.";
1437: }
1438: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1439: "$lyear2-$lmonth2-$lday2 23:59:59')";
1440: push @queries,$lquery;
1441: }
1442: if (@queries) {
1443: return join(" AND ",@queries);
1444: }
1445: return '';
1446: }
1447:
1448: ######################################################################
1449: ######################################################################
1450:
1451: =pod
1452:
1453: =item ©right_check()
1454:
1455: Inputs: $Metadata, a hash pointer of metadata for a resource.
1456:
1457: Returns: 1 if the resource is available to the user making the query,
1458: 0 otherwise.
1459:
1460: =cut
1461:
1462: ######################################################################
1463: ######################################################################
1464: sub copyright_check {
1465: my $Metadata = shift;
1466: # Check copyright tags and skip results the user cannot use
1467: my (undef,undef,$resdom,$resname) = split('/',
1468: $Metadata->{'url'});
1469: # Check for priv
1470: if (($Metadata->{'copyright'} eq 'priv') &&
1471: (($ENV{'user.name'} ne $resname) &&
1472: ($ENV{'user.domain'} ne $resdom))) {
1473: return 0;
1474: }
1475: # Check for domain
1476: if (($Metadata->{'copyright'} eq 'domain') &&
1477: ($ENV{'user.domain'} ne $resdom)) {
1478: return 0;
1479: }
1480: return 1;
1481: }
1482:
1483: ######################################################################
1484: ######################################################################
1485:
1486: =pod
1487:
1488: =item &ensure_db_and_table()
1489:
1490: Ensure we can get lonmysql to connect to the database and the table we
1491: need exists.
1492:
1493: Inputs: $r, table id
1494:
1495: Returns: undef on error, 1 if the table exists.
1496:
1497: =cut
1498:
1499: ######################################################################
1500: ######################################################################
1501: sub ensure_db_and_table {
1502: my ($r,$table) = @_;
1503: ##
1504: ## Sanity check the table id.
1505: ##
1506: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1507: $r->print("Unable to retrieve search results. ".
1508: "Unable to determine the table results were stored in. ".
1509: "</body></html>");
1510: return undef;
1511: }
1512: ##
1513: ## Make sure we can connect and the table exists.
1514: ##
1515: my $connection_result = &Apache::lonmysql::connect_to_db();
1516: if (!defined($connection_result)) {
1517: $r->print("Unable to connect to the MySQL database where your results".
1518: " are stored. </body></html>");
1519: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1520: " connect to database.");
1521: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1522: return undef;
1523: }
1524: my $table_check = &Apache::lonmysql::check_table($table);
1525: if (! defined($table_check)) {
1526: $r->print("A MySQL error has occurred.</form></body></html>");
1527: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1528: " of table ".$table);
1529: return undef;
1530: } elsif (! $table_check) {
1531: $r->print("The table of results could not be found.");
1532: &Apache::lonnet::logthis("The user requested a table, ".$table.
1533: ", that could not be found.");
1534: return undef;
1535: }
1536: return 1;
1537: }
1538:
1539: ######################################################################
1540: ######################################################################
1541:
1542: =pod
1543:
1544: =item &print_sort_form()
1545:
1546: The sort feature is not implemented at this time. This form just prints
1547: a link to change the search query.
1548:
1549: =cut
1550:
1551: ######################################################################
1552: ######################################################################
1553: sub print_sort_form {
1554: my ($r,$pretty_query_string) = @_;
1555: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1556: ##
1557: my %SortableFields=&Apache::lonlocal::texthash(
1558: id => 'Default',
1559: title => 'Title',
1560: author => 'Author',
1561: subject => 'Subject',
1562: url => 'URL',
1563: version => 'Version Number',
1564: mime => 'Mime type',
1565: lang => 'Language',
1566: owner => 'Owner/Publisher',
1567: copyright => 'Copyright',
1568: hostname => 'Host',
1569: creationdate => 'Creation Date',
1570: lastrevisiondate => 'Revision Date'
1571: );
1572: ##
1573: my $table = $ENV{'form.table'};
1574: return if (! &ensure_db_and_table($r,$table));
1575: ##
1576: ## Get the number of results
1577: ##
1578: my $total_results = &Apache::lonmysql::number_of_rows($table);
1579: if (! defined($total_results)) {
1580: $r->print("A MySQL error has occurred.</form></body></html>");
1581: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1582: " of rows in table ".$table);
1583: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1584: return;
1585: }
1586: my $result;
1587: $result.=<<END;
1588: <html>
1589: <head>
1590: <script>
1591: function change_sort() {
1592: var newloc = "/adm/searchcat?phase=results";
1593: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1594: newloc += "&sortby=";
1595: newloc += document.forms.statusform.elements.sortby.value;
1596: parent.resultsframe.location= newloc;
1597: }
1598: </script>
1599: <title>Results</title>
1600: </head>
1601: $bodytag
1602: <form name="statusform" action="" method="post">
1603: <input type="hidden" name="Queue" value="" />
1604: END
1605:
1606: #<h2>Sort Results</h2>
1607: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1608: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1609: # foreach (keys(%SortableFields)) {
1610: # $result.="<option name=\"$_\"";
1611: # if ($_ eq $ENV{'form.sortby'}) {
1612: # $result.=" selected ";
1613: # }
1614: # $result.=" >$SortableFields{$_}</option>\n";
1615: # }
1616: # $result.="</select>\n";
1617: my $revise = &revise_button();
1618: $result.=<<END;
1619: <p>
1620: There are $total_results matches to your query. $revise
1621: </p><p>
1622: Search:$pretty_query_string
1623: </p>
1624: </form>
1625: </body>
1626: </html>
1627: END
1628: $r->print($result);
1629: return;
1630: }
1631:
1632: #####################################################################
1633: #####################################################################
1634:
1635: =pod
1636:
1637: =item MySQL Table Description
1638:
1639: MySQL table creation requires a precise description of the data to be
1640: stored. The use of the correct types to hold data is vital to efficient
1641: storage and quick retrieval of records. The columns must be described in
1642: the following format:
1643:
1644: =cut
1645:
1646: #####################################################################
1647: #####################################################################
1648: #
1649: # These should probably be scoped but I don't have time right now...
1650: #
1651: my @Datatypes;
1652: my @Fullindicies;
1653:
1654: ######################################################################
1655: ######################################################################
1656:
1657: =pod
1658:
1659: =item &create_results_table()
1660:
1661: Creates the table of search results by calling lonmysql. Stores the
1662: table id in $ENV{'form.table'}
1663:
1664: Inputs: none.
1665:
1666: Returns: the identifier of the table on success, undef on error.
1667:
1668: =cut
1669:
1670: ######################################################################
1671: ######################################################################
1672: sub set_up_table_structure {
1673: my ($datatypes,$fullindicies) =
1674: &LONCAPA::lonmetadata::describe_metadata_storage();
1675: unshift(@$datatypes,{name => 'id',
1676: type => 'MEDIUMINT',
1677: restrictions => 'UNSIGNED NOT NULL',
1678: primary_key => 'yes',
1679: auto_inc => 'yes' });
1680: @Datatypes = @{$datatypes};
1681: @Fullindicies = @{$fullindicies};
1682: return;
1683: }
1684:
1685: sub create_results_table {
1686: &set_up_table_structure();
1687: my $table = &Apache::lonmysql::create_table
1688: ( { columns => \@Datatypes,
1689: FULLTEXT => [{'columns' => \@Fullindicies},],
1690: } );
1691: if (defined($table)) {
1692: $ENV{'form.table'} = $table;
1693: return $table;
1694: }
1695: return undef; # Error...
1696: }
1697:
1698: ######################################################################
1699: ######################################################################
1700:
1701: =pod
1702:
1703: =item Search Status update functions
1704:
1705: Each of the following functions changes the values of one of the
1706: input fields used to display the search status to the user. The names
1707: should be explanatory.
1708:
1709: Inputs: Apache request handler ($r), text to display.
1710:
1711: Returns: Nothing.
1712:
1713: =over 4
1714:
1715: =item &update_count_status()
1716:
1717: =item &update_status()
1718:
1719: =item &update_seconds()
1720:
1721: =back
1722:
1723: =cut
1724:
1725: ######################################################################
1726: ######################################################################
1727: sub update_count_status {
1728: my ($r,$text) = @_;
1729: $text =~ s/\'/\\\'/g;
1730: $r->print
1731: ("<script>document.statusform.count.value = ' $text'</script>\n");
1732: $r->rflush();
1733: }
1734:
1735: sub update_status {
1736: my ($r,$text) = @_;
1737: $text =~ s/\'/\\\'/g;
1738: $r->print
1739: ("<script>document.statusform.status.value = ' $text'</script>\n");
1740: $r->rflush();
1741: }
1742:
1743: sub update_seconds {
1744: my ($r,$text) = @_;
1745: $text =~ s/\'/\\\'/g;
1746: $r->print
1747: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1748: $r->rflush();
1749: }
1750:
1751: ######################################################################
1752: ######################################################################
1753:
1754: =pod
1755:
1756: =item &revise_button()
1757:
1758: Inputs: None
1759:
1760: Returns: html string for a 'revise search' button.
1761:
1762: =cut
1763:
1764: ######################################################################
1765: ######################################################################
1766: sub revise_button {
1767: my $revise_phase = 'disp_basic';
1768: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1769: my $newloc = '/adm/searchcat'.
1770: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1771: '&cleargroupsort=1'.
1772: '&phase='.$revise_phase;
1773: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1774: qq{ onClick="parent.location='$newloc';" /> };
1775: return $result;
1776: }
1777:
1778: ######################################################################
1779: ######################################################################
1780:
1781: =pod
1782:
1783: =item &run_search()
1784:
1785: Executes a search query by sending it the the other servers and putting the
1786: results into MySQL.
1787:
1788: =cut
1789:
1790: ######################################################################
1791: ######################################################################
1792: sub run_search {
1793: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1794: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1795: my $connection = $r->connection;
1796: #
1797: # Timing variables
1798: #
1799: my $starttime = time;
1800: my $max_time = 30; # seconds for the search to complete
1801: #
1802: # Print run_search header
1803: #
1804: $r->print(<<END);
1805: <html>
1806: <head><title>Search Status</title></head>
1807: $bodytag
1808: <form name="statusform" action="" method="post">
1809: <input type="hidden" name="Queue" value="" />
1810: END
1811: # Check to see if $pretty_string has more than one carriage return.
1812: # Assume \n s are following <br /> s and truncate the value.
1813: # (there is probably a better way)...
1814: my @Lines = split /<br \/>/,$pretty_string;
1815: if (@Lines > 2) {
1816: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1817: }
1818: $r->print(&mt("Search").": ".$pretty_string);
1819: $r->rflush();
1820: #
1821: # Determine the servers we need to contact.
1822: my @Servers_to_contact;
1823: if (defined($serverlist)) {
1824: if (ref($serverlist) eq 'ARRAY') {
1825: @Servers_to_contact = @$serverlist;
1826: } else {
1827: @Servers_to_contact = ($serverlist);
1828: }
1829: } else {
1830: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1831: }
1832: my %Server_status;
1833: my $table =$ENV{'form.table'};
1834: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1835: $r->print("Unable to determine table id to store search results in.".
1836: "The search has been aborted.</body></html>");
1837: return;
1838: }
1839: my $table_status = &Apache::lonmysql::check_table($table);
1840: if (! defined($table_status)) {
1841: $r->print("Unable to determine status of table.</body></html>");
1842: &Apache::lonnet::logthis("Bogus table id of $table for ".
1843: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1844: &Apache::lonnet::logthis("lonmysql error = ".
1845: &Apache::lonmysql::get_error());
1846: return;
1847: }
1848: if (! $table_status) {
1849: &Apache::lonnet::logthis("lonmysql error = ".
1850: &Apache::lonmysql::get_error());
1851: &Apache::lonnet::logthis("lonmysql debug = ".
1852: &Apache::lonmysql::get_debug());
1853: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
1854: $r->print("The table id,$table, we tried to use is invalid.".
1855: "The search has been aborted.</body></html>");
1856: return;
1857: }
1858: ##
1859: ## Prepare for the big loop.
1860: my $hitcountsum;
1861: my $server;
1862: my $status;
1863: my $revise = &revise_button();
1864: $r->print(<<END);
1865: <table>
1866: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1867: <tr>
1868: <td><input type="text" name="status" value="" size="30" /></td>
1869: <td><input type="text" name="count" value="" size="10" /></td>
1870: <td><input type="text" name="seconds" value="" size="8" /></td>
1871: <td>$revise</td>
1872: </tr>
1873: </table>
1874: </form>
1875: END
1876: $r->rflush();
1877: my $time_remaining = $max_time - (time - $starttime) ;
1878: my $last_time = $time_remaining;
1879: &update_seconds($r,$time_remaining);
1880: &update_status($r,'contacting '.$Servers_to_contact[0]);
1881: while (($time_remaining > 0) &&
1882: ((@Servers_to_contact) || keys(%Server_status))) {
1883: # Send out a search request if it needs to be done.
1884: if (@Servers_to_contact) {
1885: # Contact one server
1886: my $server = shift(@Servers_to_contact);
1887: &update_status($r,&mt('contacting').' '.$server);
1888: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1889: $customshow,[$server]);
1890: ($server) = keys(%$reply);
1891: $Server_status{$server} = $reply->{$server};
1892: } else {
1893: # wait a sec. to give time for files to be written
1894: # This sleep statement is here instead of outside the else
1895: # block because we do not want to pause if we have servers
1896: # left to contact.
1897: if (scalar (keys(%Server_status))) {
1898: &update_status($r,
1899: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1900: }
1901: sleep(1);
1902: }
1903: #
1904: # Loop through the servers we have contacted but do not
1905: # have results from yet, looking for results.
1906: while (my ($server,$status) = each(%Server_status)) {
1907: last if ($connection->aborted());
1908: if ($status eq 'con_lost') {
1909: delete ($Server_status{$server});
1910: next;
1911: }
1912: $status=~/^([\.\w]+)$/;
1913: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1914: if (-e $datafile && ! -e "$datafile.end") {
1915: &update_status($r,&mt('Receiving results from').' '.$server);
1916: next;
1917: }
1918: last if ($connection->aborted());
1919: if (-e "$datafile.end") {
1920: &update_status($r,&mt('Reading results from').' '.$server);
1921: if (-z "$datafile") {
1922: delete($Server_status{$server});
1923: next;
1924: }
1925: my $fh;
1926: if (!($fh=Apache::File->new($datafile))) {
1927: $r->print("Unable to open search results file for ".
1928: "server $server. Omitting from search");
1929: delete($Server_status{$server});
1930: next;
1931: }
1932: # Read in the whole file.
1933: while (my $result = <$fh>) {
1934: last if ($connection->aborted());
1935: # handle custom fields? Someday we will!
1936: chomp($result);
1937: next unless $result;
1938: # Parse the result.
1939: my %Fields = &parse_raw_result($result,$server);
1940: $Fields{'hostname'} = $server;
1941: next if (! ©right_check(\%Fields));
1942: # Store the result in the mysql database
1943: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1944: if (! defined($result)) {
1945: $r->print(&Apache::lonmysql::get_error());
1946: }
1947: # $r->print(&Apache::lonmysql::get_debug());
1948: $hitcountsum ++;
1949: $time_remaining = $max_time - (time - $starttime) ;
1950: if ($last_time - $time_remaining > 0) {
1951: &update_seconds($r,$time_remaining);
1952: $last_time = $time_remaining;
1953: }
1954: if ($hitcountsum % 50 == 0) {
1955: &update_count_status($r,$hitcountsum);
1956: }
1957: } # End of foreach (@results)
1958: $fh->close();
1959: # $server is only deleted if the results file has been
1960: # found and (successfully) opened. This may be a bad idea.
1961: delete($Server_status{$server});
1962: }
1963: last if ($connection->aborted());
1964: &update_count_status($r,$hitcountsum);
1965: }
1966: last if ($connection->aborted());
1967: # Finished looping through the servers
1968: $starttime = time if (@Servers_to_contact);
1969: $time_remaining = $max_time - (time - $starttime) ;
1970: if ($last_time - $time_remaining > 0) {
1971: $last_time = $time_remaining;
1972: &update_seconds($r,$time_remaining);
1973: }
1974: }
1975: &update_status($r,&mt('Search Complete').$server);
1976: &update_seconds($r,0);
1977: #
1978: &Apache::lonmysql::disconnect_from_db();
1979: #
1980: # We have run out of time or run out of servers to talk to and
1981: # results to get.
1982: $r->print("</body></html>");
1983: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
1984: $r->print("<script>".
1985: "window.location='/adm/searchcat?".
1986: "phase=sort&".
1987: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
1988: "</script>");
1989: }
1990: return;
1991: }
1992:
1993: ######################################################################
1994: ######################################################################
1995:
1996: =pod
1997:
1998: =item &prev_next_buttons()
1999:
2000: Returns html for the previous and next buttons on the search results page.
2001:
2002: =cut
2003:
2004: ######################################################################
2005: ######################################################################
2006: sub prev_next_buttons {
2007: my ($current_min,$show,$total,$parms) = @_;
2008: return '' if ($show eq 'all'); # No links if you get them all at once.
2009: my $links;
2010: ##
2011: ## Prev
2012: my $prev_min = $current_min - $show;
2013: $prev_min = 1 if $prev_min < 1;
2014: if ($prev_min < $current_min) {
2015: $links .=
2016: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
2017: &mt('prev').'</a>';
2018: } else {
2019: $links .= &mt('prev');
2020: }
2021: ##
2022: ## Pages.... Someday.
2023: ##
2024: $links .=
2025: qq{
2026: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
2027: &mt('reload').'</a>';
2028: ##
2029: ## Next
2030: my $next_min = $current_min + $show;
2031: $next_min = $current_min if ($next_min > $total);
2032: if ($next_min != $current_min) {
2033: $links .=
2034: qq{
2035: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
2036: &mt('next').'</a>';
2037: } else {
2038: $links .= ' '.&mt('next');
2039: }
2040: return $links;
2041: }
2042:
2043: ######################################################################
2044: ######################################################################
2045:
2046: =pod
2047:
2048: =item &display_results()
2049:
2050: Prints the results out for selection and perusal.
2051:
2052: =cut
2053:
2054: ######################################################################
2055: ######################################################################
2056: sub display_results {
2057: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2058: my $connection = $r->connection;
2059: $r->print(&search_results_header($importbutton,$closebutton));
2060: ##
2061: ## Set viewing function
2062: ##
2063: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2064: if (!defined($viewfunction)) {
2065: $r->print("Internal Error - Bad view selected.\n");
2066: $r->rflush();
2067: return;
2068: }
2069: ##
2070: ## $checkbox_num is a count of the number of checkboxes output on the
2071: ## page this is used only during catalogmode=groupsearch.
2072: my $checkbox_num = 0;
2073: ##
2074: ## Get the catalog controls setup
2075: ##
2076: my $action = "/adm/searchcat?phase=results";
2077: ##
2078: ## Deal with groupsearch by opening the groupsearch db file.
2079: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2080: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2081: &GDBM_WRCREAT(),0640)) {
2082: $r->print('Unable to store import results.</form></body></html>');
2083: $r->rflush();
2084: return;
2085: }
2086: }
2087: ##
2088: ## Prepare the table for querying
2089: my $table = $ENV{'form.table'};
2090: return if (! &ensure_db_and_table($r,$table));
2091: ##
2092: ## Get the number of results
2093: my $total_results = &Apache::lonmysql::number_of_rows($table);
2094: if (! defined($total_results)) {
2095: $r->print("A MySQL error has occurred.</form></body></html>");
2096: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2097: " of rows in table ".$table);
2098: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2099: return;
2100: }
2101: ##
2102: ## Determine how many results we need to get
2103: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2104: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2105: my $min = $ENV{'form.start'};
2106: my $max;
2107: if ($ENV{'form.show'} eq 'all') {
2108: $max = $total_results ;
2109: } else {
2110: $max = $min + $ENV{'form.show'} - 1;
2111: $max = $total_results if ($max > $total_results);
2112: }
2113: ##
2114: ## Output links (if necessary) for 'prev' and 'next' pages.
2115: $r->print
2116: ('<center>'.
2117: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2118: "table=".$ENV{'form.table'}.
2119: "&phase=results".
2120: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2121: ."</center>\n"
2122: );
2123: if ($total_results == 0) {
2124: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2125: '<h3>'.&mt('There are currently no results').'.</h3>'.
2126: "</form></body></html>");
2127: return;
2128: } else {
2129: $r->print
2130: ("<center>Results $min to $max out of $total_results</center>\n");
2131: }
2132: ##
2133: ## Get results from MySQL table
2134: my @Results = &Apache::lonmysql::get_rows($table,
2135: 'id>='.$min.' AND id<='.$max);
2136: ##
2137: ## Loop through the results and output them.
2138: foreach my $row (@Results) {
2139: if ($connection->aborted()) {
2140: &cleanup();
2141: return;
2142: }
2143: my %Fields = %{&parse_row(@$row)};
2144: my $output="<p>\n";
2145: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2146: $Fields{'id'},$checkbox_num++);
2147: # Render the result into html
2148: $output.= &$viewfunction($prefix,%Fields);
2149: # Print them out as they come in.
2150: $r->print($output);
2151: $r->rflush();
2152: }
2153: if (@Results < 1) {
2154: $r->print(&mt("There were no results matching your query"));
2155: } else {
2156: $r->print
2157: ('<center>'.
2158: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2159: "table=".$ENV{'form.table'}.
2160: "&phase=results".
2161: "&persistent_db_id=".
2162: $ENV{'form.persistent_db_id'})
2163: ."</center>\n"
2164: );
2165: }
2166: $r->print("</form></body></html>");
2167: $r->rflush();
2168: untie %groupsearch_db if (tied(%groupsearch_db));
2169: return;
2170: }
2171:
2172: ######################################################################
2173: ######################################################################
2174:
2175: =pod
2176:
2177: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2178:
2179: Returns html needed for the various catalog modes. Gets inputs from
2180: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2181:
2182: =cut
2183:
2184: ######################################################################
2185: ######################################################################
2186: sub catalogmode_output {
2187: my $output = '';
2188: my ($title,$url,$fnum,$checkbox_num) = @_;
2189: if ($ENV{'form.catalogmode'} eq 'interactive') {
2190: $title=~ s/\'/\\\'/g;
2191: if ($ENV{'form.catalogmode'} eq 'interactive') {
2192: $output.=<<END
2193: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2194: onClick="javascript:select_data('$title','$url')">
2195: </font>
2196: END
2197: }
2198: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2199: $groupsearch_db{"pre_${fnum}_link"}=$url;
2200: $groupsearch_db{"pre_${fnum}_title"}=$title;
2201: $output.=<<END;
2202: <font size='-1'>
2203: <input type="checkbox" name="returnvalues" value="SELECT"
2204: onClick="javascript:queue($checkbox_num,$fnum)" />
2205: </font>
2206: END
2207: }
2208: return $output;
2209: }
2210: ######################################################################
2211: ######################################################################
2212:
2213: =pod
2214:
2215: =item &parse_row()
2216:
2217: Parse a row returned from the database.
2218:
2219: =cut
2220:
2221: ######################################################################
2222: ######################################################################
2223: sub parse_row {
2224: my @Row = @_;
2225: my %Fields;
2226: if (! scalar(@Datatypes)) {
2227: &set_up_table_structure();
2228: }
2229: for (my $i=0;$i<=$#Row;$i++) {
2230: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2231: }
2232: $Fields{'language'} =
2233: &Apache::loncommon::languagedescription($Fields{'language'});
2234: $Fields{'copyrighttag'} =
2235: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2236: $Fields{'mimetag'} =
2237: &Apache::loncommon::filedescription($Fields{'mime'});
2238: return \%Fields;
2239: }
2240:
2241: ###########################################################
2242: ###########################################################
2243:
2244: =pod
2245:
2246: =item &parse_raw_result()
2247:
2248: Takes a line from the file of results and parse it. Returns a hash
2249: with keys according to column labels
2250:
2251: In addition, the following tags are set by calling the appropriate
2252: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2253:
2254: The 'title' field is set to "Untitled" if the title field is blank.
2255:
2256: 'abstract' and 'keywords' are truncated to 200 characters.
2257:
2258: =cut
2259:
2260: ###########################################################
2261: ###########################################################
2262: sub parse_raw_result {
2263: my ($result,$hostname) = @_;
2264: # conclude from self to others regarding fields
2265: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2266: (map {
2267: &Apache::lonnet::unescape($_);
2268: } (split(/\,/,$result)) );
2269: return %Fields;
2270: }
2271:
2272: ###########################################################
2273: ###########################################################
2274:
2275: =pod
2276:
2277: =item &handle_custom_fields()
2278:
2279: =cut
2280:
2281: ###########################################################
2282: ###########################################################
2283: sub handle_custom_fields {
2284: my @results = @{shift()};
2285: my $customshow='';
2286: my $extrashow='';
2287: my @customfields;
2288: if ($ENV{'form.customshow'}) {
2289: $customshow=$ENV{'form.customshow'};
2290: $customshow=~s/[^\w\s]//g;
2291: my @fields=map {
2292: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2293: } split(/\s+/,$customshow);
2294: @customfields=split(/\s+/,$customshow);
2295: if ($customshow) {
2296: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2297: }
2298: }
2299: my $customdata='';
2300: my %customhash;
2301: foreach my $result (@results) {
2302: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2303: my $tmp=$result;
2304: $tmp=~s/^custom\=//;
2305: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2306: } split(/\,/,$tmp);
2307: $customhash{$k}=$v;
2308: }
2309: }
2310: return ($extrashow,\@customfields,\%customhash);
2311: }
2312:
2313: ######################################################################
2314: ######################################################################
2315:
2316: =pod
2317:
2318: =item &search_results_header()
2319:
2320: Output the proper html headers and javascript code to deal with different
2321: calling modes.
2322:
2323: Takes most inputs directly from %ENV, except $mode.
2324:
2325: =over 4
2326:
2327: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2328:
2329: =back
2330:
2331: The following environment variables are checked:
2332:
2333: =over 4
2334:
2335: =item 'form.catalogmode'
2336:
2337: Checked for 'interactive' and 'groupsearch'.
2338:
2339: =item 'form.mode'
2340:
2341: Checked for existance & 'edit' mode.
2342:
2343: =item 'form.form'
2344:
2345: Contains the name of the form that has the input fields to set
2346:
2347: =item 'form.element'
2348:
2349: the name of the input field to put the URL into
2350:
2351: =item 'form.titleelement'
2352:
2353: the name of the input field to put the title into
2354:
2355: =back
2356:
2357: =cut
2358:
2359: ######################################################################
2360: ######################################################################
2361: sub search_results_header {
2362: my ($importbutton,$closebutton) = @_;
2363: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2364: my $result = '';
2365: # output beginning of search page
2366: # conditional output of script functions dependent on the mode in
2367: # which the search was invoked
2368: if ($ENV{'form.catalogmode'} eq 'interactive'){
2369: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2370: $result.=<<SCRIPT;
2371: <script type="text/javascript">
2372: function select_data(title,url) {
2373: changeTitle(title);
2374: changeURL(url);
2375: parent.close();
2376: }
2377: function changeTitle(val) {
2378: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2379: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2380: }
2381: }
2382: function changeURL(val) {
2383: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2384: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2385: }
2386: }
2387: </script>
2388: SCRIPT
2389: } elsif ($ENV{'form.mode'} eq 'edit') {
2390: my $form = $ENV{'form.form'};
2391: my $element = $ENV{'form.element'};
2392: my $titleelement = $ENV{'form.titleelement'};
2393: my $changetitle;
2394: if (!$titleelement) {
2395: $changetitle='function changeTitle(val) {}';
2396: } else {
2397: $changetitle=<<END;
2398: function changeTitle(val) {
2399: if (parent.targetwin.document) {
2400: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2401: } else {
2402: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2403: alert("Unable to transfer data to "+url);
2404: }
2405: }
2406: END
2407: }
2408:
2409: $result.=<<SCRIPT;
2410: <script type="text/javascript">
2411: function select_data(title,url) {
2412: changeURL(url);
2413: changeTitle(title);
2414: parent.close();
2415: }
2416: $changetitle
2417: function changeURL(val) {
2418: if (parent.targetwin.document) {
2419: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2420: } else {
2421: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2422: alert("Unable to transfer data to "+url);
2423: }
2424: }
2425: </script>
2426: SCRIPT
2427: }
2428: }
2429: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2430: <script type="text/javascript">
2431: function queue(checkbox_num,val) {
2432: if (document.forms.results.returnvalues.length != "undefined" &&
2433: typeof(document.forms.results.returnvalues.length) == "number") {
2434: if (document.forms.results.returnvalues[checkbox_num].checked) {
2435: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2436: } else {
2437: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2438: }
2439: } else {
2440: if (document.forms.results.returnvalues.checked) {
2441: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2442: } else {
2443: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2444: }
2445: }
2446: }
2447: function select_group() {
2448: parent.window.location=
2449: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2450: parent.statusframe.document.forms.statusform.elements.Queue.value;
2451: }
2452: </script>
2453: SCRIPT
2454: $result.=<<END;
2455: </head>
2456: $bodytag
2457: <form name="results" method="post" action="" >
2458: <input type="hidden" name="Queue" value="" />
2459: $importbutton
2460: END
2461: return $result;
2462: }
2463:
2464: ######################################################################
2465: ######################################################################
2466: sub search_status_header {
2467: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2468: return <<ENDSTATUS;
2469: <html><head><title>Search Status</title></head>
2470: $bodytag
2471: <h3>Search Status</h3>
2472: Sending search request to LON-CAPA servers.<br />
2473: ENDSTATUS
2474: }
2475:
2476: sub results_link {
2477: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2478: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2479: my $results_link = $basic_link."&phase=results".
2480: "&pause=1"."&start=1";
2481: return $results_link;
2482: }
2483:
2484: ######################################################################
2485: ######################################################################
2486: sub print_frames_interface {
2487: my $r = shift;
2488: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2489: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2490: my $run_search_link = $basic_link."&phase=run_search";
2491: my $results_link = &results_link();
2492: my $result = <<"ENDFRAMES";
2493: <html>
2494: <head>
2495: <script>
2496: var targetwin = opener;
2497: var queue = '';
2498: </script>
2499: <title>LON-CAPA Digital Library Search Results</title>
2500: </head>
2501: <frameset rows="150,*">
2502: <frame name="statusframe" src="$run_search_link">
2503: <frame name="resultsframe" src="$results_link">
2504: </frameset>
2505: </html>
2506: ENDFRAMES
2507:
2508: $r->print($result);
2509: return;
2510: }
2511:
2512: ######################################################################
2513: ######################################################################
2514:
2515: =pod
2516:
2517: =item Metadata Viewing Functions
2518:
2519: Output is a HTML-ified string.
2520:
2521: Input arguments are title, author, subject, url, keywords, version,
2522: notes, short abstract, mime, language, creation date,
2523: last revision date, owner, copyright, hostname, and
2524: extra custom metadata to show.
2525:
2526: =over 4
2527:
2528: =item &detailed_citation_view()
2529:
2530: =cut
2531:
2532: ######################################################################
2533: ######################################################################
2534: sub detailed_citation_view {
2535: my ($prefix,%values) = @_;
2536: my $icon=&Apache::loncommon::icon($values{'url'});
2537: my $result=<<END;
2538: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2539: target='search_preview'>$values{'title'}</a></b>
2540: <p>
2541: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2542:
2543: <b>Subject: </b> $values{'subject'}<br />
2544: <b>Keyword(s): </b> $values{'keywords'}<br />
2545: <b>Notes: </b> $values{'notes'}<br />
2546: <b>MIME Type: </b> $values{'mimetag'}<br />
2547: <b>Language: </b> $values{'language'}<br />
2548: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2549: </p>
2550: $values{'extrashow'}
2551: <p>
2552: $values{'shortabstract'}
2553: </p>
2554: <hr align='left' width='200' noshade />
2555: END
2556: return $result;
2557: }
2558:
2559: ######################################################################
2560: ######################################################################
2561:
2562: =pod
2563:
2564: =item &summary_view()
2565:
2566: =cut
2567: ######################################################################
2568: ######################################################################
2569: sub summary_view {
2570: my ($prefix,%values) = @_;
2571: my $icon=&Apache::loncommon::icon($values{'url'});
2572: my $result=<<END;
2573: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2574: target='search_preview'>$values{'author'}</a><br />
2575: $values{'title'}<br />
2576: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2577: $values{'copyrighttag'}<br />
2578: $values{'extrashow'}
2579: </p>
2580: <hr align='left' width='200' noshade />
2581: END
2582: return $result;
2583: }
2584:
2585: ######################################################################
2586: ######################################################################
2587:
2588: =pod
2589:
2590: =item &compact_view()
2591:
2592: =cut
2593:
2594: ######################################################################
2595: ######################################################################
2596: sub compact_view {
2597: my ($prefix,%values) = @_;
2598: my $icon=&Apache::loncommon::icon($values{'url'});
2599: my $result=<<END;
2600: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2601: $values{'title'}</a>
2602: <b>$values{'author'}</b><br />
2603: END
2604: return $result;
2605: }
2606:
2607:
2608: ######################################################################
2609: ######################################################################
2610:
2611: =pod
2612:
2613: =item &fielded_format_view()
2614:
2615: =cut
2616:
2617: ######################################################################
2618: ######################################################################
2619: sub fielded_format_view {
2620: my ($prefix,%values) = @_;
2621: my $icon=&Apache::loncommon::icon($values{'url'});
2622: my $result=<<END;
2623: $prefix <img src="$icon" />
2624: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2625: target='search_preview'>$values{'url'}</a>
2626: <br />
2627: <b>Title:</b> $values{'title'}<br />
2628: <b>Author(s):</b> $values{'author'}<br />
2629: <b>Subject:</b> $values{'subject'}<br />
2630: <b>Keyword(s):</b> $values{'keywords'}<br />
2631: <b>Notes:</b> $values{'notes'}<br />
2632: <b>MIME Type:</b> $values{'mimetag'}<br />
2633: <b>Language:</b> $values{'language'}<br />
2634: <b>Creation Date:</b> $values{'creationdate'}<br />
2635: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2636: <b>Publisher/Owner:</b> $values{'owner'}<br />
2637: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2638: <b>Repository Location:</b> $values{'hostname'}<br />
2639: <b>Abstract:</b> $values{'shortabstract'}<br />
2640: $values{'extrashow'}
2641: </p>
2642: <hr align='left' width='200' noshade />
2643: END
2644: return $result;
2645: }
2646:
2647: ######################################################################
2648: ######################################################################
2649:
2650: =pod
2651:
2652: =item &xml_sgml_view()
2653:
2654: =back
2655:
2656: =cut
2657:
2658: ######################################################################
2659: ######################################################################
2660: sub xml_sgml_view {
2661: my ($prefix,%values) = @_;
2662: my $result=<<END;
2663: $prefix
2664: <pre>
2665: <LonCapaResource>
2666: <url>$values{'url'}</url>
2667: <title>$values{'title'}</title>
2668: <author>$values{'author'}</author>
2669: <subject>$values{'subject'}</subject>
2670: <keywords>$values{'keywords'}</keywords>
2671: <notes>$values{'notes'}</notes>
2672: <mimeInfo>
2673: <mime>$values{'mime'}</mime>
2674: <mimetag>$values{'mimetag'}</mimetag>
2675: </mimeInfo>
2676: <languageInfo>
2677: <language>$values{'language'}</language>
2678: <languagetag>$values{'languagetag'}</languagetag>
2679: </languageInfo>
2680: <creationdate>$values{'creationdate'}</creationdate>
2681: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2682: <owner>$values{'owner'}</owner>
2683: <copyrightInfo>
2684: <copyright>$values{'copyright'}</copyright>
2685: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2686: </copyrightInfo>
2687: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2688: <shortabstract>$values{'shortabstract'}</shortabstract>
2689: </LonCapaResource>
2690: </pre>
2691: $values{'extrashow'}
2692: <hr align='left' width='200' noshade />
2693: END
2694: return $result;
2695: }
2696:
2697: ######################################################################
2698: ######################################################################
2699:
2700: =pod
2701:
2702: =item &filled() see if field is filled.
2703:
2704: =cut
2705:
2706: ######################################################################
2707: ######################################################################
2708: sub filled {
2709: my ($field)=@_;
2710: if ($field=~/\S/ && $field ne 'any') {
2711: return 1;
2712: } else {
2713: return 0;
2714: }
2715: }
2716:
2717: ######################################################################
2718: ######################################################################
2719:
2720: =pod
2721:
2722: =item &output_blank_field_error()
2723:
2724: Output a complete page that indicates the user has not filled in enough
2725: information to do a search.
2726:
2727: Inputs: $r (Apache request handle), $closebutton, $parms.
2728:
2729: Returns: nothing
2730:
2731: $parms is extra information to include in the 'Revise search request' link.
2732:
2733: =cut
2734:
2735: ######################################################################
2736: ######################################################################
2737: sub output_blank_field_error {
2738: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2739: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2740: # make query information persistent to allow for subsequent revision
2741: $r->print(<<BEGINNING);
2742: <html>
2743: <head>
2744: <title>The LearningOnline Network with CAPA</title>
2745: BEGINNING
2746: $r->print(<<RESULTS);
2747: </head>
2748: $bodytag
2749: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2750: <h1>Search Catalog</h1>
2751: <form method="post" action="/adm/searchcat">
2752: $hidden_fields
2753: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2754: >Revise search request</a>
2755: $closebutton
2756: <hr />
2757: <h3>Unactionable search query.</h3>
2758: <p>
2759: You did not fill in enough information for the search to be started.
2760: You need to fill in relevant fields on the search page in order
2761: for a query to be processed.
2762: </p>
2763: </body>
2764: </html>
2765: RESULTS
2766: }
2767:
2768: ######################################################################
2769: ######################################################################
2770:
2771: =pod
2772:
2773: =item &output_date_error()
2774:
2775: Output a full html page with an error message.
2776:
2777: Inputs:
2778:
2779: $r, the request pointer.
2780: $message, the error message for the user.
2781: $closebutton, the specialized close button needed for groupsearch.
2782:
2783: =cut
2784:
2785: ######################################################################
2786: ######################################################################
2787: sub output_date_error {
2788: my ($r,$message,$closebutton,$hidden_fields)=@_;
2789: # make query information persistent to allow for subsequent revision
2790: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2791: $r->print(<<RESULTS);
2792: <html>
2793: <head>
2794: <title>The LearningOnline Network with CAPA</title>
2795: </head>
2796: $bodytag
2797: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2798: <h1>Search Catalog</h1>
2799: <form method="post" action="/adm/searchcat">
2800: $hidden_fields
2801: <input type='button' value='Revise search request'
2802: onClick='this.form.submit();' />
2803: $closebutton
2804: <hr />
2805: <h3>Error</h3>
2806: <p>
2807: $message
2808: </p>
2809: </body>
2810: </html>
2811: RESULTS
2812: }
2813:
2814: ######################################################################
2815: ######################################################################
2816:
2817: =pod
2818:
2819: =item &start_fresh_session()
2820:
2821: Cleans the global %groupsearch_db by removing all fields which begin with
2822: 'pre_' or 'store'.
2823:
2824: =cut
2825:
2826: ######################################################################
2827: ######################################################################
2828: sub start_fresh_session {
2829: delete $groupsearch_db{'mode_catalog'};
2830: foreach (keys %groupsearch_db) {
2831: if ($_ =~ /^pre_/) {
2832: delete $groupsearch_db{$_};
2833: }
2834: if ($_ =~ /^store/) {
2835: delete $groupsearch_db{$_};
2836: }
2837: }
2838: }
2839:
2840: 1;
2841:
2842: sub cleanup {
2843: if (tied(%groupsearch_db)) {
2844: unless (untie(%groupsearch_db)) {
2845: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2846: }
2847: }
2848: &untiehash();
2849: &Apache::lonmysql::disconnect_from_db();
2850: }
2851:
2852: __END__
2853:
2854: =pod
2855:
2856: =back
2857:
2858: =cut
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