1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.202 2004/01/02 19:23:47 www 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 seperate 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:
77: ######################################################################
78: ######################################################################
79: ##
80: ## Global variables
81: ##
82: ######################################################################
83: ######################################################################
84: my %groupsearch_db; # Database hash used to save values for the
85: # groupsearch RAT interface.
86: my %persistent_db; # gdbm hash which holds data which is supposed to
87: # persist across calls to lonsearchcat.pm
88:
89: # The different view modes and associated functions
90:
91: my %Views = ("detailed" => \&detailed_citation_view,
92: "summary" => \&summary_view,
93: "fielded" => \&fielded_format_view,
94: "xml" => \&xml_sgml_view,
95: "compact" => \&compact_view);
96:
97: ######################################################################
98: ######################################################################
99: sub handler {
100: my $r = shift;
101: # &set_defaults();
102: #
103: # set form defaults
104: #
105: my $hidden_fields;# Hold all the hidden fields used to keep track
106: # of the search system state
107: my $importbutton; # button to take the selected results and go to group
108: # sorting
109: my $diropendb; # The full path to the (temporary) search database file.
110: # This is set and used in &handler() and is also used in
111: # &output_results().
112: my $bodytag; # LON-CAPA standard body tag, gotten from
113: # &Apache::lonnet::bodytag.
114: # No title, no table, just a <body> tag.
115:
116: my $loaderror=&Apache::lonnet::overloaderror($r);
117: if ($loaderror) { return $loaderror; }
118:
119: my $closebutton; # button that closes the search window
120: # This button is different for the RAT compared to
121: # normal invocation.
122: #
123: &Apache::loncommon::content_type($r,'text/html');
124: $r->send_http_header;
125: return OK if $r->header_only;
126: ##
127: ## Prevent caching of the search interface window. Hopefully this means
128: ## we will get the launch=1 passed in a little more.
129: &Apache::loncommon::no_cache($r);
130: ##
131: ## Pick up form fields passed in the links.
132: ##
133: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
134: ['catalogmode','launch','acts','mode','form','element','pause',
135: 'phase','persistent_db_id','table','start','show',
136: 'cleargroupsort','titleelement']);
137: ##
138: ## The following is a trick - we wait a few seconds if asked to so
139: ## the daemon running the search can get ahead of the daemon
140: ## printing the results. We only need (theoretically) to do
141: ## this once, so the pause indicator is deleted
142: ##
143: if (exists($ENV{'form.pause'})) {
144: sleep(1);
145: delete($ENV{'form.pause'});
146: }
147: ##
148: ## Initialize global variables
149: ##
150: my $domain = $r->dir_config('lonDefDomain');
151: $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
152: #
153: # set the name of the persistent database
154: # $ENV{'form.persistent_db_id'} can only have digits in it.
155: if (! exists($ENV{'form.persistent_db_id'}) ||
156: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
157: ($ENV{'form.launch'} eq '1')) {
158: $ENV{'form.persistent_db_id'} = time;
159: }
160: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
161: my $persistent_db_file = "/home/httpd/perl/tmp/".
162: &Apache::lonnet::escape($domain).
163: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
164: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
165: ##
166: if (! &get_persistent_form_data($persistent_db_file)) {
167: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
168: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
169: "from $persistent_db_file");
170: $r->print(<<END);
171: <html>
172: <head><title>LON-CAPA Search Error</title></head>
173: $bodytag
174: We were unable to retrieve data describing your search. This is a serious
175: error and has been logged. Please alert your LON-CAPA administrator.
176: </body>
177: </html>
178: END
179: return OK;
180: }
181: }
182: ##
183: ## Clear out old values from groupsearch database
184: ##
185: untie %groupsearch_db if (tied(%groupsearch_db));
186: if (($ENV{'form.cleargroupsort'} eq '1') ||
187: (($ENV{'form.launch'} eq '1') &&
188: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
189: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
190: &start_fresh_session();
191: untie %groupsearch_db;
192: delete($ENV{'form.cleargroupsort'});
193: } else {
194: # This is a stupid error to give to the user.
195: # It really tells them nothing.
196: $r->print('<html><head></head>'.$bodytag.
197: 'Unable to tie hash to db file</body></html>');
198: return OK;
199: }
200: }
201: ##
202: ## Configure hidden fields
203: ##
204: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
205: $ENV{'form.persistent_db_id'}.'" />'."\n";
206: if (exists($ENV{'form.catalogmode'})) {
207: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
208: $ENV{'form.catalogmode'}.'" />'."\n";
209: }
210: if (exists($ENV{'form.form'})) {
211: $hidden_fields .= '<input type="hidden" name="form" value="'.
212: $ENV{'form.form'}.'" />'."\n";
213: }
214: if (exists($ENV{'form.element'})) {
215: $hidden_fields .= '<input type="hidden" name="element" value="'.
216: $ENV{'form.element'}.'" />'."\n";
217: }
218: if (exists($ENV{'form.titleelement'})) {
219: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
220: $ENV{'form.titleelement'}.'" />'."\n";
221: }
222: if (exists($ENV{'form.mode'})) {
223: $hidden_fields .= '<input type="hidden" name="mode" value="'.
224: $ENV{'form.mode'}.'" />'."\n";
225: }
226: ##
227: ## Configure dynamic components of interface
228: ##
229: if ($ENV{'form.catalogmode'} eq 'interactive') {
230: $closebutton="<input type='button' name='close' value='CLOSE' ";
231: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
232: $closebutton .="onClick='parent.close()'";
233: } else {
234: $closebutton .="onClick='self.close()'";
235: }
236: $closebutton .=">\n";
237: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
238: $closebutton="<input type='button' name='close' value='CLOSE' ";
239: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
240: $closebutton .="onClick='parent.close()'";
241: } else {
242: $closebutton .="onClick='self.close()'";
243: }
244: $closebutton .= ">";
245: $importbutton=<<END;
246: <input type='button' name='import' value='IMPORT'
247: onClick='javascript:select_group()'>
248: END
249: } else {
250: $closebutton = '';
251: $importbutton = '';
252: }
253: ##
254: ## Sanity checks on form elements
255: ##
256: if (!defined($ENV{'form.viewselect'})) {
257: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
258: ($ENV{'form.catalogmode'} eq 'interactive')) {
259: $ENV{'form.viewselect'} ="Compact View";
260: } else {
261: $ENV{'form.viewselect'} ="Detailed Citation View";
262: }
263: }
264: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
265: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
266: ##
267: ## Switch on the phase
268: ##
269: if ($ENV{'form.phase'} eq 'disp_basic') {
270: &print_basic_search_form($r,$closebutton,$hidden_fields);
271: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
272: &print_advanced_search_form($r,$closebutton,$hidden_fields);
273: } elsif ($ENV{'form.phase'} eq 'results') {
274: &display_results($r,$importbutton,$closebutton,$diropendb);
275: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
276: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
277: &get_persistent_data($persistent_db_file,
278: ['query','customquery','customshow',
279: 'libraries','pretty_string']);
280: if ($ENV{'form.phase'} eq 'sort') {
281: &print_sort_form($r,$pretty_string);
282: } elsif ($ENV{'form.phase'} eq 'run_search') {
283: &run_search($r,$query,$customquery,$customshow,
284: $libraries,$pretty_string);
285: }
286: } elsif ($ENV{'form.phase'} eq 'course_search') {
287: &course_search($r);
288: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
289: ($ENV{'form.phase'} eq 'adv_search')) {
290: $ENV{'form.searchmode'} = 'basic';
291: if ($ENV{'form.phase'} eq 'adv_search') {
292: $ENV{'form.searchmode'} = 'advanced';
293: }
294: # Set up table
295: if (! defined(&create_results_table())) {
296: my $errorstring=&Apache::lonmysql::get_error();
297: $r->print(<<END);
298: <html><head><title>Search Error</title></head>
299: $bodytag
300: Unable to create table in which to store search results.
301: The search has been aborted.
302: <br />$errorstring
303: </body>
304: </html>
305: END
306: return OK;
307: }
308: delete($ENV{'form.launch'});
309: if (! &make_form_data_persistent($r,$persistent_db_file)) {
310: $r->print(<<END);
311: <html><head><title>Search Error</title></head>
312: $bodytag
313: Unable to properly store search information. The search has been aborted.
314: </body>
315: </html>
316: END
317: return OK;
318: }
319: #
320: # We are running a search
321: my ($query,$customquery,$customshow,$libraries) =
322: (undef,undef,undef,undef);
323: my $pretty_string;
324: if ($ENV{'form.phase'} eq 'basic_search') {
325: ($query,$pretty_string,$libraries) =
326: &parse_basic_search($r,$closebutton,$hidden_fields);
327: } else { # Advanced search
328: ($query,$customquery,$customshow,$libraries,$pretty_string)
329: = &parse_advanced_search($r,$closebutton,$hidden_fields);
330: return OK if (! defined($query));
331: }
332: &make_persistent({ query => $query,
333: customquery => $customquery,
334: customshow => $customshow,
335: libraries => $libraries,
336: pretty_string => $pretty_string },
337: $persistent_db_file);
338: ##
339: ## Print out the frames interface
340: ##
341: &print_frames_interface($r);
342: }
343: return OK;
344: }
345:
346: ######################################################################
347: ######################################################################
348: ##
349: ## Course Search
350: ##
351: ######################################################################
352: ######################################################################
353: { # Scope the course search to avoid global variables
354: #
355: # Variables For course search
356: my %alreadyseen;
357: my %hash;
358: my $totalfound;
359:
360: sub course_search {
361: my $r=shift;
362: my $bodytag=&Apache::loncommon::bodytag('Course Search');
363: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
364: my $search_string = $ENV{'form.courseexp'};
365: my @New_Words;
366: if ($ENV{'form.crsrelated'}) {
367: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
368: if (@New_Words) {
369: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
370: } else {
371: $pretty_search_string .= ' '.&mt('with no related words').".";
372: }
373: }
374: my $fulltext=$ENV{'form.crsfulltext'};
375: my @allwords=($search_string,@New_Words);
376: $totalfound=0;
377: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
378: $bodytag.$pretty_search_string);
379: $r->rflush();
380: # ======================================================= Go through the course
381: undef %alreadyseen;
382: %alreadyseen=();
383: my $c=$r->connection;
384: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
385: &GDBM_READER(),0640)) {
386: foreach (keys %hash) {
387: if ($c->aborted()) { last; }
388: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
389: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
390: @allwords);
391: }
392: }
393: untie(%hash);
394: }
395: unless ($totalfound) {
396: $r->print('<p>'.&mt('No resources found').'.</p>');
397: }
398: # =================================================== Done going through course
399: $r->print('</body></html>');
400: }
401:
402: # =============================== This pulls up a resource and its dependencies
403:
404: sub checkonthis {
405: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
406: $alreadyseen{$url}=1;
407: $r->rflush();
408: my $result=&Apache::lonnet::metadata($url,'title').' '.
409: &Apache::lonnet::metadata($url,'subject').' '.
410: &Apache::lonnet::metadata($url,'abstract').' '.
411: &Apache::lonnet::metadata($url,'keywords');
412: if (($url) && ($fulltext)) {
413: $result.=&Apache::lonnet::ssi_body($url);
414: }
415: $result=~s/\s+/ /gs;
416: my $applies=0;
417: foreach (@allwords) {
418: if ($_=~/\w/) {
419: if ($result=~/$_/si) {
420: $applies++;
421: }
422: }
423: }
424: # Does this resource apply?
425: if ($applies) {
426: $r->print('<br />');
427: for (my $i=0;$i<=$level*5;$i++) {
428: $r->print(' ');
429: }
430: $r->print('<a href="'.$url.'" target="cat">'.
431: ($title?$title:$url).'</a><br />');
432: $totalfound++;
433: } elsif ($fulltext) {
434: $r->print(' .');
435: }
436: $r->rflush();
437: # Check also the dependencies of this one
438: my $dependencies=
439: &Apache::lonnet::metadata($url,'dependencies');
440: foreach (split(/\,/,$dependencies)) {
441: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
442: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
443: }
444: }
445: }
446:
447: sub untiehash {
448: if (tied(%hash)) {
449: untie(%hash);
450: }
451: }
452:
453: } # End of course search scoping
454:
455: ######################################################################
456: ######################################################################
457:
458: =pod
459:
460: =item &print_basic_search_form()
461:
462: Returns a scalar which holds html for the basic search form.
463:
464: =cut
465:
466: ######################################################################
467: ######################################################################
468:
469: sub print_basic_search_form{
470: my ($r,$closebutton,$hidden_fields) = @_;
471: my $bodytag=&Apache::loncommon::bodytag('Search');
472: my $scrout=<<"ENDDOCUMENT";
473: <html>
474: <head>
475: <title>The LearningOnline Network with CAPA</title>
476: <script type="text/javascript">
477: function openhelp(val) {
478: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
479: 'scrollbars=1,width=600,height=300');
480: openhelpwin.focus();
481: }
482: </script>
483: </head>
484: $bodytag
485: ENDDOCUMENT
486: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
487: my $CatalogSearch=&mt('Catalog Search');
488: my $Statement=&searchhelp();
489: $scrout.=(<<ENDDOCUMENT);
490: <h1>$CatalogSearch</h1>
491: <form name="loncapa_search" method="post" action="/adm/searchcat">
492: <input type="hidden" name="phase" value="basic_search" />
493: $hidden_fields
494: <p>
495: $Statement.
496: </p>
497: <p>
498: <table>
499: <tr><td>
500: ENDDOCUMENT
501: $scrout.=' '.&Apache::lonhtmlcommon::textbox('basicexp',
502: $ENV{'form.basicexp'},40).
503: ' ';
504: my $relatedcheckbox = &Apache::lonhtmlcommon::checkbox('related',
505: $ENV{'form.related'});
506: my $domain = $r->dir_config('lonDefDomain');
507: my $domaincheckbox = &Apache::lonhtmlcommon::checkbox('domains',
508: $ENV{'form.domains'});
509: my $srch=&mt('Search');
510: my $header=&mt('Advanced Search');
511: my $userelatedwords=&mt('use related words');
512: my $onlysearchdomain=&mt('only search domain');
513: my $view=&viewoptions();
514: $scrout.=<<END;
515: </td><td><a
516: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
517: >$header</a></td></tr>
518: <tr><td>$relatedcheckbox $userelatedwords</td>
519: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
520: </table>
521: </p>
522: $view
523: <p>
524: <input type="submit" name="basicsubmit" value='$srch' />
525: $closebutton
526: END
527: $scrout.=<<ENDDOCUMENT;
528: </p>
529: </form>
530: ENDDOCUMENT
531: }
532: if ($ENV{'request.course.id'}) {
533: my %lt=&Apache::lonlocal::texthash(
534: 'srch' => 'Search',
535: 'header' => 'Course Search',
536: 'note' => 'Enter terms or phrases, then press "Search" below',
537: 'use' => 'use related words',
538: 'full' =>'fulltext search (time consuming)'
539: );
540: $scrout.=(<<ENDCOURSESEARCH);
541: <hr />
542: <h1>$lt{'header'}</h1>
543: <form name="course_search" method="post" action="/adm/searchcat">
544: <input type="hidden" name="phase" value="course_search" />
545: $hidden_fields
546: <p>
547: $lt{'note'}.
548: </p>
549: <p>
550: <table>
551: <tr><td>
552: ENDCOURSESEARCH
553: $scrout.=' '.
554: &Apache::lonhtmlcommon::textbox('courseexp',
555: $ENV{'form.courseexp'},40);
556: my $crscheckbox =
557: &Apache::lonhtmlcommon::checkbox('crsfulltext',
558: $ENV{'form.crsfulltext'});
559: my $relcheckbox =
560: &Apache::lonhtmlcommon::checkbox('crsrelated',
561: $ENV{'form.crsrelated'});
562: $scrout.=(<<ENDENDCOURSE);
563: </td></tr>
564: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
565: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
566: </table><p>
567: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
568: </p>
569: ENDENDCOURSE
570: }
571: $scrout.=(<<ENDDOCUMENT);
572: </body>
573: </html>
574: ENDDOCUMENT
575: $r->print($scrout);
576: return;
577: }
578: ######################################################################
579: ######################################################################
580:
581: =pod
582:
583: =item &advanced_search_form()
584:
585: Returns a scalar which holds html for the advanced search form.
586:
587: =cut
588:
589: ######################################################################
590: ######################################################################
591:
592: sub print_advanced_search_form{
593: my ($r,$closebutton,$hidden_fields) = @_;
594: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
595: 'reset' => 'Reset',
596: 'help' => 'Help');
597: my $advanced_buttons = <<"END";
598: <p>
599: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
600: <input type="reset" name="reset" value='$lt{"reset"}' />
601: $closebutton
602: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
603: </p>
604: END
605: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
606: my $searchhelp=&searchhelp();
607: my $scrout=<<"ENDHEADER";
608: <html>
609: <head>
610: <title>The LearningOnline Network with CAPA</title>
611: <script type="text/javascript">
612: function openhelp(val) {
613: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
614: 'scrollbars=1,width=600,height=300');
615: openhelpwin.focus();
616: }
617: </script>
618: </head>
619: $bodytag
620: $searchhelp
621: <form method="post" action="/adm/searchcat" name="advsearch">
622: $advanced_buttons
623: $hidden_fields
624: <input type="hidden" name="phase" value="adv_search" />
625: ENDHEADER
626: $scrout.=&viewoptions();
627: my %fields=&Apache::lonmeta::fieldnames();
628:
629: $scrout.='<table>';
630: $scrout.="<tr><th>".&mt('Field').'</th><th>'.&mt('Value').'</th><th>'
631: .&mt('Related').'<br />'.&mt('Words')."</td></tr>\n";
632: foreach ('title','author','owner','authorspace','modifyinguser',
633: 'keywords','notes','abstract','standards',
634: 'lowestgradelevel','highestgradelevel','mime') {
635: $scrout.='<tr bgcolor="#FFFFBB"><td>'.&titlefield($fields{$_}).'</td><td>'.
636: &Apache::lonmeta::prettyinput($_,$ENV{'form.'.$_},$_,'advsearch',
637: 1,'</td><td>',$ENV{'form.'.$_.'_related'}).
638: '</td></tr>';
639: }
640: $scrout.='<tr bgcolor="#FFFFBB"><td>'.
641: &titlefield(&mt('MIME Type Category')).'</td><td>'.
642: &Apache::loncommon::filecategoryselect('category',
643: $ENV{'form.category'}).
644: '</td><td> </td></td></tr>';
645: $scrout.='<tr bgcolor="#FFFFBB"><td>'.
646: &titlefield(&mt('Limit Search to Domains')).'</td><td>'.
647: &Apache::loncommon::domain_select('domains',
648: $ENV{'form.domains'},1).
649: '</td><td> </td></td></tr>';
650: my %dates=&Apache::lonlocal::texthash('creationdatestart' => 'Creation Date After',
651: 'creationdateend' => 'Creation Date Before',
652: 'lastrevisiondatestart' => 'Last Revision Date After',
653: 'lastrevisiondateend' => 'Last Revision Date Before');
654: foreach (sort keys %dates) {
655: $scrout.='<tr bgcolor="#FFFFBB"><td>'.&titlefield($dates{$_}).'</td><td>'.
656: &Apache::lonhtmlcommon::date_setter('advsearch',$_,0,'',1).
657: '</td><td> </td></td></tr>';
658: }
659:
660: $scrout.="</table>\n";
661:
662: $scrout.=<<ENDDOCUMENT;
663: $advanced_buttons
664: </form>
665: </body>
666: </html>
667: ENDDOCUMENT
668: $r->print($scrout);
669: return;
670: }
671: ######################################################################
672: ######################################################################
673:
674: =pod
675:
676: =item &titlefield
677:
678: Inputs: title text
679:
680: Outputs: titletext with font wrapper
681:
682: =cut
683:
684: ######################################################################
685: ######################################################################
686:
687: sub titlefield {
688: my $title=shift;
689: return '<font face="arial" color="#800000">'.$title.'</font>';
690: }
691: ######################################################################
692: ######################################################################
693:
694: =pod
695:
696: =item viewoptiontext
697:
698: Inputs: codename for view option
699:
700: Outputs: displayed text
701:
702: =cut
703:
704: ######################################################################
705: ######################################################################
706:
707: sub viewoptiontext {
708: my $code=shift;
709: my %desc=&Apache::lonlocal::texthash('detailed' => "Detailed Citation View",
710: 'xml' => 'XML/SGML',
711: 'compact' => 'Compact View',
712: 'fielded' => 'Fielded Format',
713: 'summary' => 'Summary View');
714: return $desc{$code};
715: }
716: ######################################################################
717:
718: =pod
719:
720: =item viewoptions
721:
722: Inputs: none
723:
724: Outputs: text for box with view options
725:
726: =cut
727:
728: ######################################################################
729: ######################################################################
730:
731: sub viewoptions {
732: my $scrout="\n\n".'<table bgcolor="#FFFFBB"><tr><th>'.&mt('View Options').'</th><th>'.
733: &mt('Records per Page').'</th></tr><tr><td>';
734: unless ($ENV{'form.viewselect'}) { $ENV{'form.viewselect'}='detailed'; }
735: $scrout.=&Apache::lonmeta::selectbox('viewselect',
736: $ENV{'form.viewselect'},
737: \&viewoptiontext,
738: sort(keys(%Views)));
739: $scrout.='</td><td>';
740: $scrout.=&Apache::lonmeta::selectbox('show',
741: $ENV{'form.show'},
742: undef,
743: (10,20,50,100,1000,10000));
744: $scrout.="</td></tr></table>\n\n";
745: return $scrout;
746: }
747:
748: ######################################################################
749:
750: =pod
751:
752: =item searchhelp
753:
754: Inputs: none
755:
756: Outputs: return little blurb on how to enter searches
757:
758: =cut
759:
760: ######################################################################
761: ######################################################################
762:
763: sub searchhelp {
764: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
765: }
766:
767: ######################################################################
768: ######################################################################
769:
770: =pod
771:
772: =item &get_persistent_form_data
773:
774: Inputs: filename of database
775:
776: Outputs: returns undef on database errors.
777:
778: This function is the reverse of &make_persistent() for form data.
779: Retrieve persistent data from %persistent_db. Retrieved items will have their
780: values unescaped. If a form value already exists in $ENV, it will not be
781: overwritten. Form values that are array references may have values appended
782: to them.
783:
784: =cut
785:
786: ######################################################################
787: ######################################################################
788: sub get_persistent_form_data {
789: my $filename = shift;
790: return 0 if (! -e $filename);
791: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
792: &GDBM_READER(),0640));
793: #
794: # These make sure we do not get array references printed out as 'values'.
795: my %arrays_allowed = ('form.domains'=>1);
796: #
797: # Loop through the keys, looking for 'form.'
798: foreach my $name (keys(%persistent_db)) {
799: next if ($name !~ /^form./);
800: # Kludgification begins!
801: if ($name eq 'form.domains' &&
802: $ENV{'form.searchmode'} eq 'basic' &&
803: $ENV{'form.phase'} ne 'disp_basic') {
804: next;
805: }
806: # End kludge (hopefully)
807: next if (exists($ENV{$name}));
808: my @values = map {
809: &Apache::lonnet::unescape($_);
810: } split(',',$persistent_db{$name});
811: next if (@values <1);
812: if ($arrays_allowed{$name}) {
813: $ENV{$name} = [@values];
814: } else {
815: $ENV{$name} = $values[0] if ($values[0]);
816: }
817: }
818: untie (%persistent_db);
819: return 1;
820: }
821:
822: ######################################################################
823: ######################################################################
824:
825: =pod
826:
827: =item &get_persistent_data
828:
829: Inputs: filename of database, ref to array of values to recover.
830:
831: Outputs: array of values. Returns undef on error.
832:
833: This function is the reverse of &make_persistent();
834: Retrieve persistent data from %persistent_db. Retrieved items will have their
835: values unescaped. If the item contains commas (before unescaping), the
836: returned value will be an array pointer.
837:
838: =cut
839:
840: ######################################################################
841: ######################################################################
842: sub get_persistent_data {
843: my $filename = shift;
844: my @Vars = @{shift()};
845: my @Values; # Return array
846: return undef if (! -e $filename);
847: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
848: &GDBM_READER(),0640));
849: foreach my $name (@Vars) {
850: if (! exists($persistent_db{$name})) {
851: push @Values, undef;
852: next;
853: }
854: my @values = map {
855: &Apache::lonnet::unescape($_);
856: } split(',',$persistent_db{$name});
857: if (@values <= 1) {
858: push @Values,$values[0];
859: } else {
860: push @Values,\@values;
861: }
862: }
863: untie (%persistent_db);
864: return @Values;
865: }
866:
867: ######################################################################
868: ######################################################################
869:
870: =pod
871:
872: =item &make_persistent()
873:
874: Inputs: Hash of values to save, filename of persistent database.
875:
876: Store variables away to the %persistent_db.
877: Values will be escaped. Values that are array pointers will have their
878: elements escaped and concatenated in a comma seperated string.
879:
880: =cut
881:
882: ######################################################################
883: ######################################################################
884: sub make_persistent {
885: my %save = %{shift()};
886: my $filename = shift;
887: return undef if (! tie(%persistent_db,'GDBM_File',
888: $filename,&GDBM_WRCREAT(),0640));
889: foreach my $name (keys(%save)) {
890: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
891: # We handle array references, but not recursively.
892: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
893: $persistent_db{$name} = $store;
894: }
895: untie(%persistent_db);
896: return 1;
897: }
898:
899: ######################################################################
900: ######################################################################
901:
902: =pod
903:
904: =item &make_form_data_persistent()
905:
906: Inputs: filename of persistent database.
907:
908: Store most form variables away to the %persistent_db.
909: Values will be escaped. Values that are array pointers will have their
910: elements escaped and concatenated in a comma seperated string.
911:
912: =cut
913:
914: ######################################################################
915: ######################################################################
916: sub make_form_data_persistent {
917: my $r = shift;
918: my $filename = shift;
919: my %save;
920: foreach (keys(%ENV)) {
921: next if (!/^form/ || /submit/);
922: $save{$_} = $ENV{$_};
923: }
924: return &make_persistent(\%save,$filename);
925: }
926:
927: ######################################################################
928: ######################################################################
929:
930: =pod
931:
932: =item &parse_advanced_search()
933:
934: Parse advanced search form and return the following:
935:
936: =over 4
937:
938: =item $query Scalar containing an SQL query.
939:
940: =item $customquery Scalar containing a custom query.
941:
942: =item $customshow Scalar containing commands to show custom metadata.
943:
944: =item $libraries_to_query Reference to array of domains to search.
945:
946: =back
947:
948: =cut
949:
950: ######################################################################
951: ######################################################################
952: sub parse_advanced_search {
953: my ($r,$closebutton,$hidden_fields)=@_;
954: my $fillflag=0;
955: my $pretty_search_string = "<br />\n";
956: # Clean up fields for safety
957: for my $field ('title','author','subject','keywords','url','version',
958: 'creationdatestart_month','creationdatestart_day',
959: 'creationdatestart_year','creationdateend_month',
960: 'creationdateend_day','creationdateend_year',
961: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
962: 'lastrevisiondatestart_year','lastrevisiondateend_month',
963: 'lastrevisiondateend_day','lastrevisiondateend_year',
964: 'notes','abstract','extension','language','owner',
965: 'custommetadata','customshow','category') {
966: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
967: }
968: foreach ('mode','form','element') {
969: # is this required? Hmmm.
970: next unless (exists($ENV{"form.$_"}));
971: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
972: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
973: }
974: # Preprocess the category form element.
975: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
976: ref($ENV{'form.category'}));
977: #
978: # Check to see if enough information was filled in
979: for my $field ('title','author','subject','keywords','url','version',
980: 'notes','abstract','category','extension','language',
981: 'owner','custommetadata') {
982: if (&filled($ENV{"form.$field"})) {
983: $fillflag++;
984: }
985: }
986: unless ($fillflag) {
987: &output_blank_field_error($r,$closebutton,'phase=disp_adv',$hidden_fields);
988: return ;
989: }
990: # Turn the form input into a SQL-based query
991: my $query='';
992: my @queries;
993: my $font = '<font color="#800000" face="helvetica">';
994: # Evaluate logical expression AND/OR/NOT phrase fields.
995: foreach my $field ('title','author','subject','notes','abstract','url',
996: 'keywords','version','owner','standards') {
997: if ($ENV{'form.'.$field}) {
998: my $searchphrase = $ENV{'form.'.$field};
999: $pretty_search_string .= $font."$field</font> contains <b>".
1000: $searchphrase."</b>";
1001: if ($ENV{'form.'.$field.'_related'}) {
1002: my @New_Words;
1003: ($searchphrase,@New_Words) = &related_version($searchphrase);
1004: if (@New_Words) {
1005: $pretty_search_string .= " with related words: ".
1006: "<b>@New_Words</b>.";
1007: } else {
1008: $pretty_search_string .= " with no related words.";
1009: }
1010: }
1011: $pretty_search_string .= "<br />\n";
1012: push @queries,&build_SQL_query($field,$searchphrase);
1013: }
1014: }
1015: #
1016: # Make the 'mime' from 'form.category' and 'form.extension'
1017: #
1018: my $searchphrase;
1019: if (exists($ENV{'form.category'}) &&
1020: $ENV{'form.category'} !~ /^\s*$/ &&
1021: $ENV{'form.category'} ne 'any') {
1022: my @extensions = &Apache::loncommon::filecategorytypes
1023: ($ENV{'form.category'});
1024: if (scalar(@extensions) > 0) {
1025: $searchphrase = join(' OR ',@extensions);
1026: }
1027: }
1028: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1029: $searchphrase .= ' OR ' if (defined($searchphrase));
1030: my @extensions = split(/,/,$ENV{'form.extension'});
1031: $searchphrase .= join(' OR ',@extensions);
1032: }
1033: if (defined($searchphrase)) {
1034: push @queries,&build_SQL_query('mime',$searchphrase);
1035: $pretty_search_string .=$font.'mime</font> contains <b>'.
1036: $searchphrase.'</b><br />';
1037: }
1038: #####
1039: # Evaluate option lists
1040: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1041: push @queries,"(language like \"$ENV{'form.language'}\")";
1042: $pretty_search_string.=$font."language</font>= ".
1043: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1044: "<br />\n";
1045: }
1046: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1047: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1048: $pretty_search_string.=$font."copyright</font> = ".
1049: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1050: "<br \>\n";
1051: }
1052: #
1053: # Evaluate date windows
1054: my $datequery=&build_date_queries(
1055: $ENV{'form.creationdatestart_month'},
1056: $ENV{'form.creationdatestart_day'},
1057: $ENV{'form.creationdatestart_year'},
1058: $ENV{'form.creationdateend_month'},
1059: $ENV{'form.creationdateend_day'},
1060: $ENV{'form.creationdateend_year'},
1061: $ENV{'form.lastrevisiondatestart_month'},
1062: $ENV{'form.lastrevisiondatestart_day'},
1063: $ENV{'form.lastrevisiondatestart_year'},
1064: $ENV{'form.lastrevisiondateend_month'},
1065: $ENV{'form.lastrevisiondateend_day'},
1066: $ENV{'form.lastrevisiondateend_year'},
1067: );
1068: # Test to see if date windows are legitimate
1069: if ($datequery=~/^Incorrect/) {
1070: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1071: return ;
1072: } elsif ($datequery) {
1073: # Here is where you would set up pretty_search_string to output
1074: # date query information.
1075: push @queries,$datequery;
1076: }
1077: # Process form information for custom metadata querying
1078: my $customquery=undef;
1079: # if ($ENV{'form.custommetadata'}) {
1080: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1081: # $ENV{'form.custommetadata'}."</b><br />\n";
1082: # $customquery=&build_custommetadata_query('custommetadata',
1083: # $ENV{'form.custommetadata'});
1084: # }
1085: my $customshow=undef;
1086: # if ($ENV{'form.customshow'}) {
1087: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1088: # $ENV{'form.customshow'}."</b><br />\n";
1089: # $customshow=$ENV{'form.customshow'};
1090: # $customshow=~s/[^\w\s]//g;
1091: # my @fields=split(/\s+/,$customshow);
1092: # $customshow=join(" ",@fields);
1093: # }
1094: ## ---------------------------------------------------------------
1095: ## Deal with restrictions to given domains
1096: ##
1097: my ($libraries_to_query,$pretty_domains_string) =
1098: &parse_domain_restrictions();
1099: $pretty_search_string .= $pretty_domains_string."<br />\n";
1100: #
1101: if (@queries) {
1102: $query=join(" AND ",@queries);
1103: $query="select * from metadata where $query";
1104: } elsif ($customquery) {
1105: $query = '';
1106: }
1107: return ($query,$customquery,$customshow,$libraries_to_query,
1108: $pretty_search_string);
1109: }
1110:
1111: sub parse_domain_restrictions {
1112: my $libraries_to_query = undef;
1113: # $ENV{'form.domains'} can be either a scalar or an array reference.
1114: # We need an array.
1115: if (! exists($ENV{'form.domains'})) {
1116: return (undef,'');
1117: }
1118: my @allowed_domains;
1119: if (ref($ENV{'form.domains'})) {
1120: @allowed_domains = @{$ENV{'form.domains'}};
1121: } else {
1122: @allowed_domains = ($ENV{'form.domains'});
1123: }
1124: my %domain_hash = ();
1125: my $pretty_domains_string;
1126: foreach (@allowed_domains) {
1127: $domain_hash{$_}++;
1128: }
1129: if ($domain_hash{'any'}) {
1130: $pretty_domains_string = "In all LON-CAPA domains.";
1131: } else {
1132: if (@allowed_domains > 1) {
1133: $pretty_domains_string = "In LON-CAPA domains:";
1134: } else {
1135: $pretty_domains_string = "In LON-CAPA domain ";
1136: }
1137: foreach (sort @allowed_domains) {
1138: $pretty_domains_string .= "<b>".$_."</b> ";
1139: }
1140: foreach (keys(%Apache::lonnet::libserv)) {
1141: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1142: push @$libraries_to_query,$_;
1143: }
1144: }
1145: }
1146: return ($libraries_to_query,$pretty_domains_string);
1147: }
1148:
1149: ######################################################################
1150: ######################################################################
1151:
1152: =pod
1153:
1154: =item &parse_basic_search()
1155:
1156: Parse the basic search form and return a scalar containing an sql query.
1157:
1158: =cut
1159:
1160: ######################################################################
1161: ######################################################################
1162: sub parse_basic_search {
1163: my ($r,$closebutton)=@_;
1164: # Clean up fields for safety
1165: for my $field ('basicexp') {
1166: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1167: }
1168: foreach ('mode','form','element') {
1169: # is this required? Hmmm.
1170: next unless (exists($ENV{"form.$_"}));
1171: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1172: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1173: }
1174: my ($libraries_to_query,$pretty_domains_string) =
1175: &parse_domain_restrictions();
1176: # Check to see if enough is filled in
1177: unless (&filled($ENV{'form.basicexp'})) {
1178: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1179: return OK;
1180: }
1181: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1182: my $search_string = $ENV{'form.basicexp'};
1183: if ($ENV{'form.related'}) {
1184: my @New_Words;
1185: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1186: if (@New_Words) {
1187: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1188: } else {
1189: $pretty_search_string .= " with no related words.";
1190: }
1191: }
1192: # Build SQL query string based on form page
1193: my $query='';
1194: my $concatarg=join(',',
1195: ('title', 'author', 'subject', 'notes', 'abstract',
1196: 'keywords'));
1197: $concatarg='title' if $ENV{'form.titleonly'};
1198: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1199: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1200: $pretty_search_string .= ' '.$pretty_domains_string;
1201: }
1202: $pretty_search_string .= "<br />\n";
1203: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1204: # &Apache::lonnet::logthis($final_query);
1205: return ($final_query,$pretty_search_string,
1206: $libraries_to_query);
1207: }
1208:
1209:
1210: ######################################################################
1211: ######################################################################
1212:
1213: =pod
1214:
1215: =item &related_version
1216:
1217: Modifies an input string to include related words. Words in the string
1218: are replaced with parenthesized lists of 'OR'd words. For example
1219: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1220:
1221: Note: Using this twice on a string is probably silly.
1222:
1223: =cut
1224:
1225: ######################################################################
1226: ######################################################################
1227: sub related_version {
1228: my $search_string = shift;
1229: my $result = $search_string;
1230: my %New_Words = ();
1231: while ($search_string =~ /(\w+)/cg) {
1232: my $word = $1;
1233: next if (lc($word) =~ /\b(or|and|not)\b/);
1234: my @Words = &Apache::loncommon::get_related_words($word);
1235: @Words = ($#Words>4? @Words[0..4] : @Words);
1236: foreach (@Words) { $New_Words{$_}++;}
1237: my $replacement = join " OR ", ($word,@Words);
1238: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1239: }
1240: return $result,sort(keys(%New_Words));
1241: }
1242:
1243: ######################################################################
1244: ######################################################################
1245:
1246: =pod
1247:
1248: =item &build_SQL_query()
1249:
1250: Builds a SQL query string from a logical expression with AND/OR keywords
1251: using Text::Query and &recursive_SQL_query_builder()
1252:
1253: =cut
1254:
1255: ######################################################################
1256: ######################################################################
1257: sub build_SQL_query {
1258: my ($field_name,$logic_statement)=@_;
1259: my $q=new Text::Query('abc',
1260: -parse => 'Text::Query::ParseAdvanced',
1261: -build => 'Text::Query::Build');
1262: $q->prepare($logic_statement);
1263: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1264: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1265: return $sql_query;
1266: }
1267:
1268: ######################################################################
1269: ######################################################################
1270:
1271: =pod
1272:
1273: =item &build_custommetadata_query()
1274:
1275: Constructs a custom metadata query using a rather heinous regular
1276: expression.
1277:
1278: =cut
1279:
1280: ######################################################################
1281: ######################################################################
1282: sub build_custommetadata_query {
1283: my ($field_name,$logic_statement)=@_;
1284: my $q=new Text::Query('abc',
1285: -parse => 'Text::Query::ParseAdvanced',
1286: -build => 'Text::Query::BuildAdvancedString');
1287: $q->prepare($logic_statement);
1288: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1289: # quick fix to change literal into xml tag-matching
1290: # will eventually have to write a separate builder module
1291: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1292: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1293: /\\<$1\\>?# \<wordone\>
1294: \[\^\\<\]?# [^\<]
1295: \*$2\[\^\\<\]?# *wordtwo[^\<]
1296: \*\\<\\\/$1\\>?# *\<\/wordone\>
1297: /g;
1298: return $matchexp;
1299: }
1300:
1301: ######################################################################
1302: ######################################################################
1303:
1304: =pod
1305:
1306: =item &recursive_SQL_query_build()
1307:
1308: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1309:
1310: =cut
1311:
1312: ######################################################################
1313: ######################################################################
1314: sub recursive_SQL_query_build {
1315: my ($dkey,$pattern)=@_;
1316: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1317: return $pattern unless @matches;
1318: foreach my $match (@matches) {
1319: $match=~/\[ (\w+)\s(.*) \]/;
1320: my ($key,$value)=($1,$2);
1321: my $replacement='';
1322: if ($key eq 'literal') {
1323: $replacement="($dkey LIKE \"\%$value\%\")";
1324: } elsif (lc($key) eq 'not') {
1325: $value=~s/LIKE/NOT LIKE/;
1326: # $replacement="($dkey not like $value)";
1327: $replacement="$value";
1328: } elsif ($key eq 'and') {
1329: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1330: $replacement="($1 AND $2)";
1331: } elsif ($key eq 'or') {
1332: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1333: $replacement="($1 OR $2)";
1334: }
1335: substr($pattern,
1336: index($pattern,$match),
1337: length($match),
1338: $replacement);
1339: }
1340: &recursive_SQL_query_build($dkey,$pattern);
1341: }
1342:
1343: ######################################################################
1344: ######################################################################
1345:
1346: =pod
1347:
1348: =item &build_date_queries()
1349:
1350: Builds a SQL logic query to check time/date entries.
1351: Also reports errors (check for /^Incorrect/).
1352:
1353: =cut
1354:
1355: ######################################################################
1356: ######################################################################
1357: sub build_date_queries {
1358: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1359: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1360: my @queries;
1361: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1362: unless ($cmonth1 and $cday1 and $cyear1 and
1363: $cmonth2 and $cday2 and $cyear2) {
1364: return "Incorrect entry for the creation date. You must specify ".
1365: "a starting month, day, and year and an ending month, ".
1366: "day, and year.";
1367: }
1368: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1369: $cnumeric1+=0;
1370: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1371: $cnumeric2+=0;
1372: if ($cnumeric1>$cnumeric2) {
1373: return "Incorrect entry for the creation date. The starting ".
1374: "date must occur before the ending date.";
1375: }
1376: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1377: "$cyear2-$cmonth2-$cday2 23:59:59')";
1378: push @queries,$cquery;
1379: }
1380: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1381: unless ($lmonth1 and $lday1 and $lyear1 and
1382: $lmonth2 and $lday2 and $lyear2) {
1383: return "Incorrect entry for the last revision date. You must ".
1384: "specify a starting month, day, and year and an ending ".
1385: "month, day, and year.";
1386: }
1387: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1388: $lnumeric1+=0;
1389: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1390: $lnumeric2+=0;
1391: if ($lnumeric1>$lnumeric2) {
1392: return "Incorrect entry for the last revision date. The ".
1393: "starting date must occur before the ending date.";
1394: }
1395: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1396: "$lyear2-$lmonth2-$lday2 23:59:59')";
1397: push @queries,$lquery;
1398: }
1399: if (@queries) {
1400: return join(" AND ",@queries);
1401: }
1402: return '';
1403: }
1404:
1405: ######################################################################
1406: ######################################################################
1407:
1408: =pod
1409:
1410: =item ©right_check()
1411:
1412: =cut
1413:
1414: ######################################################################
1415: ######################################################################
1416: sub copyright_check {
1417: my $Metadata = shift;
1418: # Check copyright tags and skip results the user cannot use
1419: my (undef,undef,$resdom,$resname) = split('/',
1420: $Metadata->{'url'});
1421: # Check for priv
1422: if (($Metadata->{'copyright'} eq 'priv') &&
1423: (($ENV{'user.name'} ne $resname) &&
1424: ($ENV{'user.domain'} ne $resdom))) {
1425: return 0;
1426: }
1427: # Check for domain
1428: if (($Metadata->{'copyright'} eq 'domain') &&
1429: ($ENV{'user.domain'} ne $resdom)) {
1430: return 0;
1431: }
1432: return 1;
1433: }
1434:
1435:
1436: ######################################################################
1437: ######################################################################
1438:
1439: =pod
1440:
1441: =item &ensure_db_and_table
1442:
1443: Ensure we can get lonmysql to connect to the database and the table we
1444: need exists.
1445:
1446: Inputs: $r, table id
1447:
1448: Returns: undef on error, 1 if the table exists.
1449:
1450: =cut
1451:
1452: ######################################################################
1453: ######################################################################
1454: sub ensure_db_and_table {
1455: my ($r,$table) = @_;
1456: ##
1457: ## Sanity check the table id.
1458: ##
1459: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1460: $r->print("Unable to retrieve search results. ".
1461: "Unable to determine the table results were stored in. ".
1462: "</body></html>");
1463: return undef;
1464: }
1465: ##
1466: ## Make sure we can connect and the table exists.
1467: ##
1468: my $connection_result = &Apache::lonmysql::connect_to_db();
1469: if (!defined($connection_result)) {
1470: $r->print("Unable to connect to the MySQL database where your results".
1471: " are stored. </body></html>");
1472: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1473: " connect to database.");
1474: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1475: return undef;
1476: }
1477: my $table_check = &Apache::lonmysql::check_table($table);
1478: if (! defined($table_check)) {
1479: $r->print("A MySQL error has occurred.</form></body></html>");
1480: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1481: " of table ".$table);
1482: return undef;
1483: } elsif (! $table_check) {
1484: $r->print("The table of results could not be found.");
1485: &Apache::lonnet::logthis("The user requested a table, ".$table.
1486: ", that could not be found.");
1487: return undef;
1488: }
1489: return 1;
1490: }
1491:
1492: ######################################################################
1493: ######################################################################
1494:
1495: =pod
1496:
1497: =item &print_sort_form
1498:
1499: =cut
1500:
1501: ######################################################################
1502: ######################################################################
1503: sub print_sort_form {
1504: my ($r,$pretty_query_string) = @_;
1505: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1506: ##
1507: my %SortableFields=&Apache::lonlocal::texthash(
1508: id => 'Default',
1509: title => 'Title',
1510: author => 'Author',
1511: subject => 'Subject',
1512: url => 'URL',
1513: version => 'Version Number',
1514: mime => 'Mime type',
1515: lang => 'Language',
1516: owner => 'Owner/Publisher',
1517: copyright => 'Copyright',
1518: hostname => 'Host',
1519: creationdate => 'Creation Date',
1520: lastrevisiondate => 'Revision Date'
1521: );
1522: ##
1523: my $table = $ENV{'form.table'};
1524: return if (! &ensure_db_and_table($r,$table));
1525: ##
1526: ## Get the number of results
1527: ##
1528: my $total_results = &Apache::lonmysql::number_of_rows($table);
1529: if (! defined($total_results)) {
1530: $r->print("A MySQL error has occurred.</form></body></html>");
1531: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1532: " of rows in table ".$table);
1533: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1534: return;
1535: }
1536: my $result;
1537: $result.=<<END;
1538: <html>
1539: <head>
1540: <script>
1541: function change_sort() {
1542: var newloc = "/adm/searchcat?phase=results";
1543: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1544: newloc += "&sortby=";
1545: newloc += document.forms.statusform.elements.sortby.value;
1546: parent.resultsframe.location= newloc;
1547: }
1548: </script>
1549: <title>Results</title>
1550: </head>
1551: $bodytag
1552: <form name="statusform" action="" method="post">
1553: <input type="hidden" name="Queue" value="" />
1554: END
1555:
1556: #<h2>Sort Results</h2>
1557: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1558: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1559: # foreach (keys(%SortableFields)) {
1560: # $result.="<option name=\"$_\"";
1561: # if ($_ eq $ENV{'form.sortby'}) {
1562: # $result.=" selected ";
1563: # }
1564: # $result.=" >$SortableFields{$_}</option>\n";
1565: # }
1566: # $result.="</select>\n";
1567: my $revise = &revise_button();
1568: $result.=<<END;
1569: <p>
1570: There are $total_results matches to your query. $revise
1571: </p><p>
1572: Search:$pretty_query_string
1573: </p>
1574: </form>
1575: </body>
1576: </html>
1577: END
1578: $r->print($result);
1579: return;
1580: }
1581:
1582: #####################################################################
1583: #####################################################################
1584:
1585: =pod
1586:
1587: =item MySQL Table Description
1588:
1589: MySQL table creation requires a precise description of the data to be
1590: stored. The use of the correct types to hold data is vital to efficient
1591: storage and quick retrieval of records. The columns must be described in
1592: the following format:
1593:
1594: =cut
1595:
1596: #####################################################################
1597: #####################################################################
1598:
1599: my @Datatypes =
1600: ( { name => 'id',
1601: type => 'MEDIUMINT',
1602: restrictions => 'UNSIGNED NOT NULL',
1603: primary_key => 'yes',
1604: auto_inc => 'yes' },
1605: { name => 'title', type=>'TEXT'},
1606: { name => 'author', type=>'TEXT'},
1607: { name => 'subject', type=>'TEXT'},
1608: { name => 'url', type=>'TEXT', restrictions => 'NOT NULL' },
1609: { name => 'keywords', type=>'TEXT'},
1610: { name => 'version', type=>'TEXT'},
1611: { name => 'notes', type=>'TEXT'},
1612: { name => 'abstract', type=>'TEXT'},
1613: { name => 'mime', type=>'TEXT'},
1614: { name => 'language', type=>'TEXT'},
1615: { name => 'owner', type=>'TEXT'},
1616: { name => 'copyright', type=>'TEXT'},
1617: { name => 'dependencies', type=>'TEXT'},
1618: { name => 'modifyinguser', type=>'TEXT'},
1619: { name => 'authorspace', type=>'TEXT'},
1620: { name => 'lowestgradelevel', type=>'INT'},
1621: { name => 'highestgradelevel', type=>'INT'},
1622: { name => 'standards', type=>'TEXT'},
1623: { name => 'count', type=>'INT'},
1624: { name => 'course', type=>'INT'},
1625: { name => 'course_list', type=>'TEXT'},
1626: { name => 'goto', type=>'INT'},
1627: { name => 'goto_list', type=>'TEXT'},
1628: { name => 'comefrom', type=>'INT'},
1629: { name => 'comefrom_list', type=>'TEXT'},
1630: { name => 'sequsage', type=>'INT'},
1631: { name => 'sequsage_list', type=>'TEXT'},
1632: { name => 'stdno', type=>'INT'},
1633: { name => 'stdno_list', type=>'TEXT'},
1634: { name => 'avetries', type=>'FLOAT'},
1635: { name => 'avetries_list', type=>'TEXT'},
1636: { name => 'difficulty', type=>'FLOAT'},
1637: { name => 'difficulty_list', type=>'TEXT'},
1638: { name => 'clear', type=>'FLOAT'},
1639: { name => 'technical', type=>'FLOAT'},
1640: { name => 'correct', type=>'FLOAT'},
1641: { name => 'helpful', type=>'FLOAT'},
1642: { name => 'depth', type=>'FLOAT'},
1643: { name => 'hostname', type=> 'TEXT'},
1644: #--------------------------------------------------
1645: { name => 'creationdate', type=>'DATETIME'},
1646: { name => 'lastrevisiondate', type=>'DATETIME'},
1647: #--------------------------------------------------
1648: );
1649:
1650: my @Fullindicies =
1651: qw/title/;
1652: # qw/title author subject abstract mime language owner copyright/;
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 create_results_table {
1673: my $table = &Apache::lonmysql::create_table
1674: ( { columns => \@Datatypes,
1675: FULLTEXT => [{'columns' => \@Fullindicies},],
1676: } );
1677: if (defined($table)) {
1678: $ENV{'form.table'} = $table;
1679: return $table;
1680: }
1681: return undef; # Error...
1682: }
1683:
1684: ######################################################################
1685: ######################################################################
1686:
1687: =pod
1688:
1689: =item Search Status update functions
1690:
1691: Each of the following functions changes the values of one of the
1692: input fields used to display the search status to the user. The names
1693: should be explanatory.
1694:
1695: Inputs: Apache request handler ($r), text to display.
1696:
1697: Returns: Nothing.
1698:
1699: =over 4
1700:
1701: =item &update_count_status()
1702:
1703: =item &update_status()
1704:
1705: =item &update_seconds()
1706:
1707: =back
1708:
1709: =cut
1710:
1711: ######################################################################
1712: ######################################################################
1713: sub update_count_status {
1714: my ($r,$text) = @_;
1715: $text =~ s/\'/\\\'/g;
1716: $r->print
1717: ("<script>document.statusform.count.value = ' $text'</script>\n");
1718: $r->rflush();
1719: }
1720:
1721: sub update_status {
1722: my ($r,$text) = @_;
1723: $text =~ s/\'/\\\'/g;
1724: $r->print
1725: ("<script>document.statusform.status.value = ' $text'</script>\n");
1726: $r->rflush();
1727: }
1728:
1729: sub update_seconds {
1730: my ($r,$text) = @_;
1731: $text =~ s/\'/\\\'/g;
1732: $r->print
1733: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1734: $r->rflush();
1735: }
1736:
1737: ######################################################################
1738: ######################################################################
1739:
1740: =pod
1741:
1742: =item &revise_button
1743:
1744: Inputs: None
1745:
1746: Returns: html string for a 'revise search' button.
1747:
1748: =cut
1749:
1750: ######################################################################
1751: ######################################################################
1752: sub revise_button {
1753: my $revise_phase = 'disp_basic';
1754: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1755: my $newloc = '/adm/searchcat'.
1756: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1757: '&cleargroupsort=1'.
1758: '&phase='.$revise_phase;
1759: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1760: qq{ onClick="parent.location='$newloc';" /> };
1761: return $result;
1762: }
1763:
1764: ######################################################################
1765: ######################################################################
1766:
1767: =pod
1768:
1769: =item &run_search
1770:
1771: =cut
1772:
1773: ######################################################################
1774: ######################################################################
1775: sub run_search {
1776: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1777: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1778: my $connection = $r->connection;
1779: #
1780: # Timing variables
1781: #
1782: my $starttime = time;
1783: my $max_time = 30; # seconds for the search to complete
1784: #
1785: # Print run_search header
1786: #
1787: $r->print(<<END);
1788: <html>
1789: <head><title>Search Status</title></head>
1790: $bodytag
1791: <form name="statusform" action="" method="post">
1792: <input type="hidden" name="Queue" value="" />
1793: END
1794: # Check to see if $pretty_string has more than one carriage return.
1795: # Assume \n s are following <br /> s and truncate the value.
1796: # (there is probably a better way)...
1797: my @Lines = split /<br \/>/,$pretty_string;
1798: if (@Lines > 2) {
1799: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1800: }
1801: $r->print(&mt("Search").": ".$pretty_string);
1802: $r->rflush();
1803: #
1804: # Determine the servers we need to contact.
1805: #
1806: my @Servers_to_contact;
1807: if (defined($serverlist)) {
1808: if (ref($serverlist) eq 'ARRAY') {
1809: @Servers_to_contact = @$serverlist;
1810: } else {
1811: @Servers_to_contact = ($serverlist);
1812: }
1813: } else {
1814: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1815: }
1816: my %Server_status;
1817: my $table =$ENV{'form.table'};
1818: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1819: $r->print("Unable to determine table id to store search results in.".
1820: "The search has been aborted.</body></html>");
1821: return;
1822: }
1823: my $table_status = &Apache::lonmysql::check_table($table);
1824: if (! defined($table_status)) {
1825: $r->print("Unable to determine status of table.</body></html>");
1826: &Apache::lonnet::logthis("Bogus table id of $table for ".
1827: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1828: &Apache::lonnet::logthis("lonmysql error = ".
1829: &Apache::lonmysql::get_error());
1830: return;
1831: }
1832: if (! $table_status) {
1833: $r->print("The table id,$table, we tried to use is invalid.".
1834: "The search has been aborted.</body></html>");
1835: return;
1836: }
1837: ##
1838: ## Prepare for the big loop.
1839: ##
1840: my $hitcountsum;
1841: my $server;
1842: my $status;
1843: my $revise = &revise_button();
1844: $r->print(<<END);
1845: <table>
1846: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1847: <tr>
1848: <td><input type="text" name="status" value="" size="30" /></td>
1849: <td><input type="text" name="count" value="" size="10" /></td>
1850: <td><input type="text" name="seconds" value="" size="8" /></td>
1851: <td>$revise</td>
1852: </tr>
1853: </table>
1854: </form>
1855: END
1856: $r->rflush();
1857: my $time_remaining = $max_time - (time - $starttime) ;
1858: my $last_time = $time_remaining;
1859: &update_seconds($r,$time_remaining);
1860: &update_status($r,'contacting '.$Servers_to_contact[0]);
1861: while (($time_remaining > 0) &&
1862: ((@Servers_to_contact) || keys(%Server_status))) {
1863: # Send out a search request if it needs to be done.
1864: if (@Servers_to_contact) {
1865: # Contact one server
1866: my $server = shift(@Servers_to_contact);
1867: &update_status($r,&mt('contacting').' '.$server);
1868: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1869: $customshow,[$server]);
1870: ($server) = keys(%$reply);
1871: $Server_status{$server} = $reply->{$server};
1872: } else {
1873: # wait a sec. to give time for files to be written
1874: # This sleep statement is here instead of outside the else
1875: # block because we do not want to pause if we have servers
1876: # left to contact.
1877: if (scalar (keys(%Server_status))) {
1878: &update_status($r,
1879: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1880: }
1881: sleep(1);
1882: }
1883: #
1884: #
1885: # Loop through the servers we have contacted but do not
1886: # have results from yet, looking for results.
1887: while (my ($server,$status) = each(%Server_status)) {
1888: last if ($connection->aborted());
1889: if ($status eq 'con_lost') {
1890: delete ($Server_status{$server});
1891: next;
1892: }
1893: $status=~/^([\.\w]+)$/;
1894: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1895: if (-e $datafile && ! -e "$datafile.end") {
1896: &update_status($r,&mt('Receiving results from').' '.$server);
1897: next;
1898: }
1899: last if ($connection->aborted());
1900: if (-e "$datafile.end") {
1901: &update_status($r,&mt('Reading results from').' '.$server);
1902: if (-z "$datafile") {
1903: delete($Server_status{$server});
1904: next;
1905: }
1906: my $fh;
1907: if (!($fh=Apache::File->new($datafile))) {
1908: $r->print("Unable to open search results file for ".
1909: "server $server. Omitting from search");
1910: delete($Server_status{$server});
1911: next;
1912: }
1913: # Read in the whole file.
1914: while (my $result = <$fh>) {
1915: last if ($connection->aborted());
1916: # handle custom fields? Someday we will!
1917: chomp($result);
1918: next unless $result;
1919: # Parse the result.
1920: my %Fields = &parse_raw_result($result,$server);
1921: $Fields{'hostname'} = $server;
1922: next if (! ©right_check(\%Fields));
1923: # Store the result in the mysql database
1924: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1925: if (! defined($result)) {
1926: $r->print(&Apache::lonmysql::get_error());
1927: }
1928: # $r->print(&Apache::lonmysql::get_debug());
1929: $hitcountsum ++;
1930: $time_remaining = $max_time - (time - $starttime) ;
1931: if ($last_time - $time_remaining > 0) {
1932: &update_seconds($r,$time_remaining);
1933: $last_time = $time_remaining;
1934: }
1935: if ($hitcountsum % 50 == 0) {
1936: &update_count_status($r,$hitcountsum);
1937: }
1938: } # End of foreach (@results)
1939: $fh->close();
1940: # $server is only deleted if the results file has been
1941: # found and (successfully) opened. This may be a bad idea.
1942: delete($Server_status{$server});
1943: }
1944: last if ($connection->aborted());
1945: &update_count_status($r,$hitcountsum);
1946: }
1947: last if ($connection->aborted());
1948: # Finished looping through the servers
1949: $starttime = time if (@Servers_to_contact);
1950: $time_remaining = $max_time - (time - $starttime) ;
1951: if ($last_time - $time_remaining > 0) {
1952: $last_time = $time_remaining;
1953: &update_seconds($r,$time_remaining);
1954: }
1955: }
1956: &update_status($r,&mt('Search Complete').$server);
1957: &update_seconds($r,0);
1958: &Apache::lonmysql::disconnect_from_db();
1959: # We have run out of time or run out of servers to talk to and
1960: # results to get.
1961: $r->print("</body></html>");
1962: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
1963: $r->print("<script>".
1964: "window.location='/adm/searchcat?".
1965: "phase=sort&".
1966: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
1967: "</script>");
1968: }
1969: return;
1970: }
1971:
1972: ######################################################################
1973: ######################################################################
1974: =pod
1975:
1976: =item &prev_next_buttons
1977:
1978: =cut
1979:
1980: ######################################################################
1981: ######################################################################
1982: sub prev_next_buttons {
1983: my ($current_min,$show,$total,$parms) = @_;
1984: return '' if ($show eq 'all'); # No links if you get them all at once.
1985: my $links;
1986: ##
1987: ## Prev
1988: my $prev_min = $current_min - $show;
1989: $prev_min = 1 if $prev_min < 1;
1990: if ($prev_min < $current_min) {
1991: $links .= qq{
1992: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
1993: };
1994: } else {
1995: $links .= 'prev';
1996: }
1997: ##
1998: ## Pages.... Someday.
1999: ##
2000: $links .= qq{
2001: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2002: };
2003: ##
2004: ## Next
2005: my $next_min = $current_min + $show;
2006: $next_min = $current_min if ($next_min > $total);
2007: if ($next_min != $current_min) {
2008: $links .= qq{
2009: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2010: };
2011: } else {
2012: $links .= ' next';
2013: }
2014: return $links;
2015: }
2016: ######################################################################
2017: ######################################################################
2018:
2019: =pod
2020:
2021: =item &display_results
2022:
2023: =cut
2024:
2025: ######################################################################
2026: ######################################################################
2027: sub display_results {
2028: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2029: my $connection = $r->connection;
2030: $r->print(&search_results_header($importbutton,$closebutton));
2031: ##
2032: ## Set viewing function
2033: ##
2034: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2035: if (!defined($viewfunction)) {
2036: $r->print("Internal Error - Bad view selected.\n");
2037: $r->rflush();
2038: return;
2039: }
2040: ##
2041: ## $checkbox_num is a count of the number of checkboxes output on the
2042: ## page this is used only during catalogmode=groupsearch.
2043: my $checkbox_num = 0;
2044: ##
2045: ## Get the catalog controls setup
2046: ##
2047: my $action = "/adm/searchcat?phase=results";
2048: ##
2049: ## Deal with groupsearch
2050: ##
2051: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2052: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2053: &GDBM_WRCREAT(),0640)) {
2054: $r->print('Unable to store import results.</form></body></html>');
2055: $r->rflush();
2056: return;
2057: }
2058: }
2059: ##
2060: ## Prepare the table for querying
2061: ##
2062: my $table = $ENV{'form.table'};
2063: return if (! &ensure_db_and_table($r,$table));
2064: ##
2065: ## Get the number of results
2066: ##
2067: my $total_results = &Apache::lonmysql::number_of_rows($table);
2068: if (! defined($total_results)) {
2069: $r->print("A MySQL error has occurred.</form></body></html>");
2070: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2071: " of rows in table ".$table);
2072: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2073: return;
2074: }
2075: ##
2076: ## Determine how many results we need to get
2077: ##
2078: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2079: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2080: my $min = $ENV{'form.start'};
2081: my $max;
2082: if ($ENV{'form.show'} eq 'all') {
2083: $max = $total_results ;
2084: } else {
2085: $max = $min + $ENV{'form.show'} - 1;
2086: $max = $total_results if ($max > $total_results);
2087: }
2088: ##
2089: ## Output links (if necessary) for 'prev' and 'next' pages.
2090: ##
2091: $r->print
2092: ('<center>'.
2093: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2094: "table=".$ENV{'form.table'}.
2095: "&phase=results".
2096: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2097: ."</center>\n"
2098: );
2099: if ($total_results == 0) {
2100: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2101: '<h3>'.&mt('There are currently no results').'.</h3>'.
2102: "</form></body></html>");
2103: return;
2104: } else {
2105: $r->print
2106: ("<center>Results $min to $max out of $total_results</center>\n");
2107: }
2108: ##
2109: ## Get results from MySQL table
2110: ##
2111: my @Results = &Apache::lonmysql::get_rows($table,
2112: 'id>='.$min.' AND id<='.$max);
2113: ##
2114: ## Loop through the results and output them.
2115: ##
2116: foreach my $row (@Results) {
2117: if ($connection->aborted()) {
2118: &cleanup();
2119: return;
2120: }
2121: my %Fields = %{&parse_row(@$row)};
2122: my $output="<p>\n";
2123: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2124: $Fields{'id'},$checkbox_num++);
2125: # Render the result into html
2126: $output.= &$viewfunction($prefix,%Fields);
2127: # Print them out as they come in.
2128: $r->print($output);
2129: $r->rflush();
2130: }
2131: if (@Results < 1) {
2132: $r->print(&mt("There were no results matching your query"));
2133: } else {
2134: $r->print
2135: ('<center>'.
2136: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2137: "table=".$ENV{'form.table'}.
2138: "&phase=results".
2139: "&persistent_db_id=".
2140: $ENV{'form.persistent_db_id'})
2141: ."</center>\n"
2142: );
2143: }
2144: $r->print("</form></body></html>");
2145: $r->rflush();
2146: untie %groupsearch_db if (tied(%groupsearch_db));
2147: return;
2148: }
2149:
2150: ######################################################################
2151: ######################################################################
2152:
2153: =pod
2154:
2155: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2156:
2157: Returns html needed for the various catalog modes. Gets inputs from
2158: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2159:
2160: =cut
2161:
2162: ######################################################################
2163: ######################################################################
2164: sub catalogmode_output {
2165: my $output = '';
2166: my ($title,$url,$fnum,$checkbox_num) = @_;
2167: if ($ENV{'form.catalogmode'} eq 'interactive') {
2168: $title=~ s/\'/\\\'/g;
2169: if ($ENV{'form.catalogmode'} eq 'interactive') {
2170: $output.=<<END
2171: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2172: onClick="javascript:select_data('$title','$url')">
2173: </font>
2174: END
2175: }
2176: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2177: $groupsearch_db{"pre_${fnum}_link"}=$url;
2178: $groupsearch_db{"pre_${fnum}_title"}=$title;
2179: $output.=<<END;
2180: <font size='-1'>
2181: <input type="checkbox" name="returnvalues" value="SELECT"
2182: onClick="javascript:queue($checkbox_num,$fnum)" />
2183: </font>
2184: END
2185: }
2186: return $output;
2187: }
2188: ######################################################################
2189: ######################################################################
2190:
2191: =pod
2192:
2193: =item &parse_row
2194:
2195: Parse a row returned from the database.
2196:
2197: =cut
2198:
2199: ######################################################################
2200: ######################################################################
2201: sub parse_row {
2202: my @Row = @_;
2203: my %Fields;
2204: for (my $i=0;$i<=$#Row;$i++) {
2205: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2206: }
2207: $Fields{'language'} =
2208: &Apache::loncommon::languagedescription($Fields{'language'});
2209: $Fields{'copyrighttag'} =
2210: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2211: $Fields{'mimetag'} =
2212: &Apache::loncommon::filedescription($Fields{'mime'});
2213: return \%Fields;
2214: }
2215:
2216: ###########################################################
2217: ###########################################################
2218:
2219: =pod
2220:
2221: =item &parse_raw_result()
2222:
2223: Takes a line from the file of results and parse it. Returns a hash
2224: with keys according to column labels
2225:
2226: In addition, the following tags are set by calling the appropriate
2227: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2228:
2229: The 'title' field is set to "Untitled" if the title field is blank.
2230:
2231: 'abstract' and 'keywords' are truncated to 200 characters.
2232:
2233: =cut
2234:
2235: ###########################################################
2236: ###########################################################
2237: sub parse_raw_result {
2238: my ($result,$hostname) = @_;
2239: # conclude from self to others regarding fields
2240: my %Fields=&Apache::lonmeta::metadata_col_to_hash(
2241: map {
2242: &Apache::lonnet::unescape($_);
2243: } (split(/\,/,$result))
2244: );
2245: return %Fields;
2246: }
2247:
2248: ###########################################################
2249: ###########################################################
2250:
2251: =pod
2252:
2253: =item &handle_custom_fields()
2254:
2255: =cut
2256:
2257: ###########################################################
2258: ###########################################################
2259: sub handle_custom_fields {
2260: my @results = @{shift()};
2261: my $customshow='';
2262: my $extrashow='';
2263: my @customfields;
2264: if ($ENV{'form.customshow'}) {
2265: $customshow=$ENV{'form.customshow'};
2266: $customshow=~s/[^\w\s]//g;
2267: my @fields=map {
2268: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2269: } split(/\s+/,$customshow);
2270: @customfields=split(/\s+/,$customshow);
2271: if ($customshow) {
2272: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2273: }
2274: }
2275: my $customdata='';
2276: my %customhash;
2277: foreach my $result (@results) {
2278: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2279: my $tmp=$result;
2280: $tmp=~s/^custom\=//;
2281: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2282: } split(/\,/,$tmp);
2283: $customhash{$k}=$v;
2284: }
2285: }
2286: return ($extrashow,\@customfields,\%customhash);
2287: }
2288:
2289: ######################################################################
2290: ######################################################################
2291:
2292: =pod
2293:
2294: =item &search_results_header
2295:
2296: Output the proper html headers and javascript code to deal with different
2297: calling modes.
2298:
2299: Takes most inputs directly from %ENV, except $mode.
2300:
2301: =over 4
2302:
2303: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2304:
2305: =back
2306:
2307: The following environment variables are checked:
2308:
2309: =over 4
2310:
2311: =item 'form.catalogmode'
2312:
2313: Checked for 'interactive' and 'groupsearch'.
2314:
2315: =item 'form.mode'
2316:
2317: Checked for existance & 'edit' mode.
2318:
2319: =item 'form.form'
2320:
2321: Contains the name of the form that has the input fields to set
2322:
2323: =item 'form.element'
2324:
2325: the name of the input field to put the URL into
2326:
2327: =item 'form.titleelement'
2328:
2329: the name of the input field to put the title into
2330:
2331: =back
2332:
2333: =cut
2334:
2335: ######################################################################
2336: ######################################################################
2337: sub search_results_header {
2338: my ($importbutton,$closebutton) = @_;
2339: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2340: my $result = '';
2341: # output beginning of search page
2342: # conditional output of script functions dependent on the mode in
2343: # which the search was invoked
2344: if ($ENV{'form.catalogmode'} eq 'interactive'){
2345: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2346: $result.=<<SCRIPT;
2347: <script type="text/javascript">
2348: function select_data(title,url) {
2349: changeTitle(title);
2350: changeURL(url);
2351: parent.close();
2352: }
2353: function changeTitle(val) {
2354: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2355: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2356: }
2357: }
2358: function changeURL(val) {
2359: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2360: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2361: }
2362: }
2363: </script>
2364: SCRIPT
2365: } elsif ($ENV{'form.mode'} eq 'edit') {
2366: my $form = $ENV{'form.form'};
2367: my $element = $ENV{'form.element'};
2368: my $titleelement = $ENV{'form.titleelement'};
2369: my $changetitle;
2370: if (!$titleelement) {
2371: $changetitle='function changeTitle(val) {}';
2372: } else {
2373: $changetitle=<<END;
2374: function changeTitle(val) {
2375: if (parent.targetwin.document) {
2376: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2377: } else {
2378: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2379: alert("Unable to transfer data to "+url);
2380: }
2381: }
2382: END
2383: }
2384:
2385: $result.=<<SCRIPT;
2386: <script type="text/javascript">
2387: function select_data(title,url) {
2388: changeURL(url);
2389: changeTitle(title);
2390: parent.close();
2391: }
2392: $changetitle
2393: function changeURL(val) {
2394: if (parent.targetwin.document) {
2395: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2396: } else {
2397: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2398: alert("Unable to transfer data to "+url);
2399: }
2400: }
2401: </script>
2402: SCRIPT
2403: }
2404: }
2405: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2406: <script type="text/javascript">
2407: function queue(checkbox_num,val) {
2408: if (document.forms.results.returnvalues.length != "undefined" &&
2409: typeof(document.forms.results.returnvalues.length) == "number") {
2410: if (document.forms.results.returnvalues[checkbox_num].checked) {
2411: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2412: } else {
2413: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2414: }
2415: } else {
2416: if (document.forms.results.returnvalues.checked) {
2417: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2418: } else {
2419: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2420: }
2421: }
2422: }
2423: function select_group() {
2424: parent.window.location=
2425: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2426: parent.statusframe.document.forms.statusform.elements.Queue.value;
2427: }
2428: </script>
2429: SCRIPT
2430: $result.=<<END;
2431: </head>
2432: $bodytag
2433: <form name="results" method="post" action="" >
2434: <input type="hidden" name="Queue" value="" />
2435: $importbutton
2436: END
2437: return $result;
2438: }
2439:
2440: ######################################################################
2441: ######################################################################
2442: sub search_status_header {
2443: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2444: return <<ENDSTATUS;
2445: <html><head><title>Search Status</title></head>
2446: $bodytag
2447: <h3>Search Status</h3>
2448: Sending search request to LON-CAPA servers.<br />
2449: ENDSTATUS
2450: }
2451:
2452: sub results_link {
2453: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2454: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2455: my $results_link = $basic_link."&phase=results".
2456: "&pause=1"."&start=1";
2457: return $results_link;
2458: }
2459:
2460: ######################################################################
2461: ######################################################################
2462: sub print_frames_interface {
2463: my $r = shift;
2464: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2465: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2466: my $run_search_link = $basic_link."&phase=run_search";
2467: my $results_link = &results_link();
2468: my $result = <<"ENDFRAMES";
2469: <html>
2470: <head>
2471: <script>
2472: var targetwin = opener;
2473: var queue = '';
2474: </script>
2475: <title>LON-CAPA Digital Library Search Results</title>
2476: </head>
2477: <frameset rows="150,*">
2478: <frame name="statusframe" src="$run_search_link">
2479: <frame name="resultsframe" src="$results_link">
2480: </frameset>
2481: </html>
2482: ENDFRAMES
2483:
2484: $r->print($result);
2485: return;
2486: }
2487:
2488: ######################################################################
2489: ######################################################################
2490:
2491: =pod
2492:
2493: =item Metadata Viewing Functions
2494:
2495: Output is a HTML-ified string.
2496: Input arguments are title, author, subject, url, keywords, version,
2497: notes, short abstract, mime, language, creation date,
2498: last revision date, owner, copyright, hostname, and
2499: extra custom metadata to show.
2500:
2501: =over 4
2502:
2503: =item &detailed_citation_view()
2504:
2505: =cut
2506:
2507: ######################################################################
2508: ######################################################################
2509: sub detailed_citation_view {
2510: my ($prefix,%values) = @_;
2511: my $icon=&Apache::loncommon::icon($values{'url'});
2512: my $result=<<END;
2513: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2514: target='search_preview'>$values{'title'}</a></b>
2515: <p>
2516: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2517:
2518: <b>Subject: </b> $values{'subject'}<br />
2519: <b>Keyword(s): </b> $values{'keywords'}<br />
2520: <b>Notes: </b> $values{'notes'}<br />
2521: <b>MIME Type: </b> $values{'mimetag'}<br />
2522: <b>Language: </b> $values{'language'}<br />
2523: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2524: </p>
2525: $values{'extrashow'}
2526: <p>
2527: $values{'shortabstract'}
2528: </p>
2529: <hr align='left' width='200' noshade />
2530: END
2531: return $result;
2532: }
2533:
2534: ######################################################################
2535: ######################################################################
2536:
2537: =pod
2538:
2539: =item &summary_view()
2540:
2541: =cut
2542: ######################################################################
2543: ######################################################################
2544: sub summary_view {
2545: my ($prefix,%values) = @_;
2546: my $icon=&Apache::loncommon::icon($values{'url'});
2547: my $result=<<END;
2548: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2549: target='search_preview'>$values{'author'}</a><br />
2550: $values{'title'}<br />
2551: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2552: $values{'copyrighttag'}<br />
2553: $values{'extrashow'}
2554: </p>
2555: <hr align='left' width='200' noshade />
2556: END
2557: return $result;
2558: }
2559:
2560: ######################################################################
2561: ######################################################################
2562:
2563: =pod
2564:
2565: =item &compact_view()
2566:
2567: =cut
2568:
2569: ######################################################################
2570: ######################################################################
2571: sub compact_view {
2572: my ($prefix,%values) = @_;
2573: my $icon=&Apache::loncommon::icon($values{'url'});
2574: my $result=<<END;
2575: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2576: $values{'title'}</a>
2577: <b>$values{'author'}</b><br />
2578: END
2579: return $result;
2580: }
2581:
2582:
2583: ######################################################################
2584: ######################################################################
2585:
2586: =pod
2587:
2588: =item &fielded_format_view()
2589:
2590: =cut
2591:
2592: ######################################################################
2593: ######################################################################
2594: sub fielded_format_view {
2595: my ($prefix,%values) = @_;
2596: my $icon=&Apache::loncommon::icon($values{'url'});
2597: my $result=<<END;
2598: $prefix <img src="$icon" />
2599: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2600: target='search_preview'>$values{'url'}</a>
2601: <br />
2602: <b>Title:</b> $values{'title'}<br />
2603: <b>Author(s):</b> $values{'author'}<br />
2604: <b>Subject:</b> $values{'subject'}<br />
2605: <b>Keyword(s):</b> $values{'keywords'}<br />
2606: <b>Notes:</b> $values{'notes'}<br />
2607: <b>MIME Type:</b> $values{'mimetag'}<br />
2608: <b>Language:</b> $values{'language'}<br />
2609: <b>Creation Date:</b> $values{'creationdate'}<br />
2610: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2611: <b>Publisher/Owner:</b> $values{'owner'}<br />
2612: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2613: <b>Repository Location:</b> $values{'hostname'}<br />
2614: <b>Abstract:</b> $values{'shortabstract'}<br />
2615: $values{'extrashow'}
2616: </p>
2617: <hr align='left' width='200' noshade />
2618: END
2619: return $result;
2620: }
2621:
2622: ######################################################################
2623: ######################################################################
2624:
2625: =pod
2626:
2627: =item &xml_sgml_view()
2628:
2629: =back
2630:
2631: =cut
2632:
2633: ######################################################################
2634: ######################################################################
2635: sub xml_sgml_view {
2636: my ($prefix,%values) = @_;
2637: my $result=<<END;
2638: $prefix
2639: <pre>
2640: <LonCapaResource>
2641: <url>$values{'url'}</url>
2642: <title>$values{'title'}</title>
2643: <author>$values{'author'}</author>
2644: <subject>$values{'subject'}</subject>
2645: <keywords>$values{'keywords'}</keywords>
2646: <notes>$values{'notes'}</notes>
2647: <mimeInfo>
2648: <mime>$values{'mime'}</mime>
2649: <mimetag>$values{'mimetag'}</mimetag>
2650: </mimeInfo>
2651: <languageInfo>
2652: <language>$values{'language'}</language>
2653: <languagetag>$values{'languagetag'}</languagetag>
2654: </languageInfo>
2655: <creationdate>$values{'creationdate'}</creationdate>
2656: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2657: <owner>$values{'owner'}</owner>
2658: <copyrightInfo>
2659: <copyright>$values{'copyright'}</copyright>
2660: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2661: </copyrightInfo>
2662: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2663: <shortabstract>$values{'shortabstract'}</shortabstract>
2664: </LonCapaResource>
2665: </pre>
2666: $values{'extrashow'}
2667: <hr align='left' width='200' noshade />
2668: END
2669: return $result;
2670: }
2671:
2672: ######################################################################
2673: ######################################################################
2674:
2675: =pod
2676:
2677: =item &filled() see if field is filled.
2678:
2679: =cut
2680:
2681: ######################################################################
2682: ######################################################################
2683: sub filled {
2684: my ($field)=@_;
2685: if ($field=~/\S/ && $field ne 'any') {
2686: return 1;
2687: }
2688: else {
2689: return 0;
2690: }
2691: }
2692:
2693: ######################################################################
2694: ######################################################################
2695:
2696: =pod
2697:
2698: =item &output_blank_field_error()
2699:
2700: Output a complete page that indicates the user has not filled in enough
2701: information to do a search.
2702:
2703: Inputs: $r (Apache request handle), $closebutton, $parms.
2704:
2705: Returns: nothing
2706:
2707: $parms is extra information to include in the 'Revise search request' link.
2708:
2709: =cut
2710:
2711: ######################################################################
2712: ######################################################################
2713: sub output_blank_field_error {
2714: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2715: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2716: # make query information persistent to allow for subsequent revision
2717: $r->print(<<BEGINNING);
2718: <html>
2719: <head>
2720: <title>The LearningOnline Network with CAPA</title>
2721: BEGINNING
2722: $r->print(<<RESULTS);
2723: </head>
2724: $bodytag
2725: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2726: <h1>Search Catalog</h1>
2727: <form method="post" action="/adm/searchcat">
2728: $hidden_fields
2729: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2730: >Revise search request</a>
2731: $closebutton
2732: <hr />
2733: <h3>Unactionable search query.</h3>
2734: <p>
2735: You did not fill in enough information for the search to be started.
2736: You need to fill in relevant fields on the search page in order
2737: for a query to be processed.
2738: </p>
2739: </body>
2740: </html>
2741: RESULTS
2742: }
2743:
2744: ######################################################################
2745: ######################################################################
2746:
2747: =pod
2748:
2749: =item &output_date_error()
2750:
2751: Output a full html page with an error message.
2752:
2753: Inputs:
2754:
2755: $r, the request pointer.
2756: $message, the error message for the user.
2757: $closebutton, the specialized close button needed for groupsearch.
2758:
2759: =cut
2760:
2761: ######################################################################
2762: ######################################################################
2763: sub output_date_error {
2764: my ($r,$message,$closebutton,$hidden_fields)=@_;
2765: # make query information persistent to allow for subsequent revision
2766: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2767: $r->print(<<RESULTS);
2768: <html>
2769: <head>
2770: <title>The LearningOnline Network with CAPA</title>
2771: </head>
2772: $bodytag
2773: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2774: <h1>Search Catalog</h1>
2775: <form method="post" action="/adm/searchcat">
2776: $hidden_fields
2777: <input type='button' value='Revise search request'
2778: onClick='this.form.submit();' />
2779: $closebutton
2780: <hr />
2781: <h3>Error</h3>
2782: <p>
2783: $message
2784: </p>
2785: </body>
2786: </html>
2787: RESULTS
2788: }
2789:
2790: ######################################################################
2791: ######################################################################
2792:
2793: =pod
2794:
2795: =item &start_fresh_session()
2796:
2797: Cleans the global %groupsearch_db by removing all fields which begin with
2798: 'pre_' or 'store'.
2799:
2800: =cut
2801:
2802: ######################################################################
2803: ######################################################################
2804: sub start_fresh_session {
2805: delete $groupsearch_db{'mode_catalog'};
2806: foreach (keys %groupsearch_db) {
2807: if ($_ =~ /^pre_/) {
2808: delete $groupsearch_db{$_};
2809: }
2810: if ($_ =~ /^store/) {
2811: delete $groupsearch_db{$_};
2812: }
2813: }
2814: }
2815:
2816: 1;
2817:
2818: sub cleanup {
2819: if (tied(%groupsearch_db)) {
2820: unless (untie(%groupsearch_db)) {
2821: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2822: }
2823: }
2824: &untiehash();
2825: &Apache::lonmysql::disconnect_from_db();
2826: }
2827:
2828: __END__
2829:
2830: =pod
2831:
2832: =back
2833:
2834: =cut
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