1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.229 2004/06/03 20:32:33 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78: use Parse::RecDescent;
79:
80: ######################################################################
81: ######################################################################
82: ##
83: ## Global variables
84: ##
85: ######################################################################
86: ######################################################################
87: my %groupsearch_db; # Database hash used to save values for the
88: # groupsearch RAT interface.
89: my %persistent_db; # gdbm hash which holds data which is supposed to
90: # persist across calls to lonsearchcat.pm
91:
92: # The different view modes and associated functions
93:
94: my %Views = ("detailed" => \&detailed_citation_view,
95: "summary" => \&summary_view,
96: "fielded" => \&fielded_format_view,
97: "xml" => \&xml_sgml_view,
98: "compact" => \&compact_view);
99:
100: ######################################################################
101: ######################################################################
102: sub handler {
103: my $r = shift;
104: # &set_defaults();
105: #
106: # set form defaults
107: #
108: my $hidden_fields;# Hold all the hidden fields used to keep track
109: # of the search system state
110: my $importbutton; # button to take the selected results and go to group
111: # sorting
112: my $diropendb; # The full path to the (temporary) search database file.
113: # This is set and used in &handler() and is also used in
114: # &output_results().
115: my $bodytag; # LON-CAPA standard body tag, gotten from
116: # &Apache::lonnet::bodytag.
117: # No title, no table, just a <body> tag.
118:
119: my $loaderror=&Apache::lonnet::overloaderror($r);
120: if ($loaderror) { return $loaderror; }
121: #
122: my $closebutton; # button that closes the search window
123: # This button is different for the RAT compared to
124: # normal invocation.
125: #
126: &Apache::loncommon::content_type($r,'text/html');
127: $r->send_http_header;
128: return OK if $r->header_only;
129: ##
130: ## Prevent caching of the search interface window. Hopefully this means
131: ## we will get the launch=1 passed in a little more.
132: &Apache::loncommon::no_cache($r);
133: ##
134: ## Pick up form fields passed in the links.
135: ##
136: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
137: ['catalogmode','launch','acts','mode','form','element','pause',
138: 'phase','persistent_db_id','table','start','show',
139: 'cleargroupsort','titleelement']);
140: ##
141: ## The following is a trick - we wait a few seconds if asked to so
142: ## the daemon running the search can get ahead of the daemon
143: ## printing the results. We only need (theoretically) to do
144: ## this once, so the pause indicator is deleted
145: ##
146: if (exists($ENV{'form.pause'})) {
147: sleep(1);
148: delete($ENV{'form.pause'});
149: }
150: ##
151: ## Initialize global variables
152: ##
153: my $domain = $r->dir_config('lonDefDomain');
154: $diropendb= "/home/httpd/perl/tmp/".
155: "$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
156: #
157: # set the name of the persistent database
158: # $ENV{'form.persistent_db_id'} can only have digits in it.
159: if (! exists($ENV{'form.persistent_db_id'}) ||
160: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
161: ($ENV{'form.launch'} eq '1')) {
162: $ENV{'form.persistent_db_id'} = time;
163: }
164: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
165: my $persistent_db_file = "/home/httpd/perl/tmp/".
166: &Apache::lonnet::escape($domain).
167: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
168: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
169: ##
170: &Apache::lonhtmlcommon::clear_breadcrumbs();
171: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
172: &Apache::lonhtmlcommon::add_breadcrumb
173: ({href=>'/adm/searchcat?'.
174: 'catalogmode='.$ENV{'form.catalogmode'}.
175: '&launch='.$ENV{'form.launch'}.
176: '&mode='.$ENV{'form.mode'},
177: text=>"Course and Catalog Search",
178: target=>'_top',
179: bug=>'Searching',});
180: } else {
181: &Apache::lonhtmlcommon::add_breadcrumb
182: ({href=>'/adm/searchcat?'.
183: 'catalogmode='.$ENV{'form.catalogmode'}.
184: '&launch='.$ENV{'form.launch'}.
185: '&mode='.$ENV{'form.mode'},
186: text=>"Catalog Search",
187: target=>'_top',
188: bug=>'Searching',});
189: }
190: #
191: if ($ENV{'form.phase'} !~ m/(basic|adv|course)_search/) {
192: if (! &get_persistent_form_data($persistent_db_file)) {
193: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
194: &Apache::lonnet::logthis('lonsearchcat:'.
195: 'Unable to recover data from '.
196: $persistent_db_file);
197: $r->print(<<END);
198: <html>
199: <head><title>LON-CAPA Search Error</title></head>
200: $bodytag
201: We were unable to retrieve data describing your search. This is a serious
202: error and has been logged. Please alert your LON-CAPA administrator.
203: </body>
204: </html>
205: END
206: return OK;
207: }
208: }
209: } else {
210: &clean_up_environment();
211: }
212: ##
213: ## Clear out old values from groupsearch database
214: ##
215: untie %groupsearch_db if (tied(%groupsearch_db));
216: if (($ENV{'form.cleargroupsort'} eq '1') ||
217: (($ENV{'form.launch'} eq '1') &&
218: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
219: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
220: &start_fresh_session();
221: untie %groupsearch_db;
222: delete($ENV{'form.cleargroupsort'});
223: } else {
224: # This is a stupid error to give to the user.
225: # It really tells them nothing.
226: $r->print('<html><head></head>'.$bodytag.
227: 'Unable to tie hash to db file</body></html>');
228: return OK;
229: }
230: }
231: ##
232: ## Configure hidden fields
233: ##
234: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
235: $ENV{'form.persistent_db_id'}.'" />'."\n";
236: if (exists($ENV{'form.catalogmode'})) {
237: $hidden_fields .= &hidden_field('catalogmode');
238: }
239: if (exists($ENV{'form.form'})) {
240: $hidden_fields .= &hidden_field('form');
241: }
242: if (exists($ENV{'form.element'})) {
243: $hidden_fields .= &hidden_field('element');
244: }
245: if (exists($ENV{'form.titleelement'})) {
246: $hidden_fields .= &hidden_field('titleelement');
247: }
248: if (exists($ENV{'form.mode'})) {
249: $hidden_fields .= &hidden_field('mode');
250: }
251: ##
252: ## Configure dynamic components of interface
253: ##
254: if ($ENV{'form.catalogmode'} eq 'interactive') {
255: $closebutton="<input type='button' name='close' value='CLOSE' ";
256: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
257: $closebutton .="onClick='parent.close()'";
258: } else {
259: $closebutton .="onClick='self.close()'";
260: }
261: $closebutton .=">\n";
262: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
263: $closebutton="<input type='button' name='close' value='CLOSE' ";
264: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
265: $closebutton .="onClick='parent.close()'";
266: } else {
267: $closebutton .="onClick='self.close()'";
268: }
269: $closebutton .= ">";
270: $importbutton=<<END;
271: <input type='button' name='import' value='IMPORT'
272: onClick='javascript:select_group()'>
273: END
274: } else {
275: $closebutton = '';
276: $importbutton = '';
277: }
278: ##
279: ## Sanity checks on form elements
280: ##
281: if (!defined($ENV{'form.viewselect'})) {
282: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
283: ($ENV{'form.catalogmode'} eq 'interactive')) {
284: $ENV{'form.viewselect'} ="Compact View";
285: } else {
286: $ENV{'form.viewselect'} ="Detailed Citation View";
287: }
288: }
289: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
290: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
291: #
292: $ENV{'form.searchmode'} = 'basic' if (! exists($ENV{'form.searchmode'}));
293: if ($ENV{'form.phase'} eq 'adv_search' ||
294: $ENV{'form.phase'} eq 'disp_adv') {
295: $ENV{'form.searchmode'} = 'advanced';
296: } elsif ($ENV{'form.phase'} eq 'course_search') {
297: $ENV{'form.searchmode'} = 'course_search';
298: }
299: #
300: if ($ENV{'form.searchmode'} eq 'advanced') {
301: &Apache::lonhtmlcommon::add_breadcrumb
302: ({href=>'/adm/searchcat?phase=disp_adv&'.
303: 'catalogmode='.$ENV{'form.catalogmode'}.
304: '&launch='.$ENV{'form.launch'}.
305: '&mode='.$ENV{'form.mode'},
306: text=>"Advanced Search",
307: bug=>'Searching',});
308: } elsif ($ENV{'form.searchmode'} eq 'course search') {
309: &Apache::lonhtmlcommon::add_breadcrumb
310: ({href=>'/adm/searchcat?phase=disp_adv&'.
311: 'catalogmode='.$ENV{'form.catalogmode'}.
312: '&launch='.$ENV{'form.launch'}.
313: '&mode='.$ENV{'form.mode'},
314: text=>"Course Search",
315: bug=>'Searching',});
316: }
317: ##
318: ## Switch on the phase
319: ##
320: if ($ENV{'form.phase'} eq 'disp_basic') {
321: &print_basic_search_form($r,$closebutton,$hidden_fields);
322: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
323: &print_advanced_search_form($r,$closebutton,$hidden_fields);
324: } elsif ($ENV{'form.phase'} eq 'results') {
325: &display_results($r,$importbutton,$closebutton,$diropendb);
326: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
327: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
328: &get_persistent_data($persistent_db_file,
329: ['query','customquery','customshow',
330: 'libraries','pretty_string']);
331: if ($ENV{'form.phase'} eq 'sort') {
332: &print_sort_form($r,$pretty_string);
333: } elsif ($ENV{'form.phase'} eq 'run_search') {
334: &run_search($r,$query,$customquery,$customshow,
335: $libraries,$pretty_string);
336: }
337: } elsif ($ENV{'form.phase'} eq 'course_search') {
338: &course_search($r);
339: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
340: ($ENV{'form.phase'} eq 'adv_search')) {
341: #
342: # We are running a search, try to parse it
343: my ($query,$customquery,$customshow,$libraries) =
344: (undef,undef,undef,undef);
345: my $pretty_string;
346: if ($ENV{'form.phase'} eq 'basic_search') {
347: ($query,$pretty_string,$libraries) =
348: &parse_basic_search($r,$closebutton,$hidden_fields);
349: return OK if (! defined($query));
350: &make_persistent({ basicexp => $ENV{'form.basicexp'}},
351: $persistent_db_file);
352: } else { # Advanced search
353: ($query,$customquery,$customshow,$libraries,$pretty_string)
354: = &parse_advanced_search($r,$closebutton,$hidden_fields);
355: return OK if (! defined($query));
356: }
357: &make_persistent({ query => $query,
358: customquery => $customquery,
359: customshow => $customshow,
360: libraries => $libraries,
361: pretty_string => $pretty_string },
362: $persistent_db_file);
363: #
364: # Set up table
365: if (! defined(&create_results_table())) {
366: my $errorstring=&Apache::lonmysql::get_error();
367: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
368: 'needed table. lonmysql error:'.
369: $errorstring);
370: $r->print(<<END);
371: <html><head><title>Search Error</title></head>
372: $bodytag
373: Unable to create table in which to store search results.
374: The search has been aborted.
375: </body>
376: </html>
377: END
378: return OK;
379: }
380: delete($ENV{'form.launch'});
381: if (! &make_form_data_persistent($r,$persistent_db_file)) {
382: $r->print(<<END);
383: <html><head><title>Search Error</title></head>
384: $bodytag
385: Unable to properly store search information. The search has been aborted.
386: </body>
387: </html>
388: END
389: return OK;
390: }
391: ##
392: ## Print out the frames interface
393: ##
394: if (defined($query)) {
395: &print_frames_interface($r);
396: }
397: }
398: return OK;
399: }
400:
401: #
402: # The mechanism used to store values away and retrieve them does not
403: # handle the case of missing environment variables being significant.
404: #
405: # This routine sets non existant checkbox form elements to ''.
406: #
407: sub clean_up_environment {
408: if ($ENV{'form.phase'} eq 'basic_search') {
409: if (! exists($ENV{'form.related'})) {
410: $ENV{'form.related'} = '';
411: }
412: if (! exists($ENV{'form.domains'})) {
413: $ENV{'form.domains'} = '';
414: }
415: } elsif ($ENV{'form.phase'} eq 'adv_search') {
416: foreach my $field ('title','keywords','notes',
417: 'abstract','standards','mime') {
418: if (! exists($ENV{'form.'.$field.'_related'})) {
419: $ENV{'form.'.$field.'_related'} = '';
420: }
421: }
422: } elsif ($ENV{'form.phase'} eq 'course_search') {
423: if (! exists($ENV{'form.crsrelated'})) {
424: $ENV{'form.crsrelated'} = '';
425: }
426: }
427: }
428:
429: sub hidden_field {
430: my ($name,$value) = @_;
431: if (! defined($value)) {
432: $value = $ENV{'form.'.$name};
433: }
434: return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
435: }
436:
437: ######################################################################
438: ######################################################################
439: ##
440: ## Course Search
441: ##
442: ######################################################################
443: ######################################################################
444: { # Scope the course search to avoid global variables
445: #
446: # Variables For course search
447: my %alreadyseen;
448: my %hash;
449: my $totalfound;
450:
451: sub course_search {
452: my $r=shift;
453: my $bodytag=&Apache::loncommon::bodytag('Course Search');
454: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
455: my $search_string = $ENV{'form.courseexp'};
456: my @New_Words;
457: if ($ENV{'form.crsrelated'}) {
458: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
459: if (@New_Words) {
460: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
461: } else {
462: $pretty_search_string .= ' '.&mt('with no related words').".";
463: }
464: }
465: my $fulltext=$ENV{'form.crsfulltext'};
466: my @allwords=($search_string,@New_Words);
467: $totalfound=0;
468: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
469: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
470: $r->rflush();
471: # ======================================================= Go through the course
472: undef %alreadyseen;
473: %alreadyseen=();
474: my $c=$r->connection;
475: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
476: &GDBM_READER(),0640)) {
477: foreach (keys %hash) {
478: if ($c->aborted()) { last; }
479: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
480: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
481: @allwords);
482: }
483: }
484: untie(%hash);
485: }
486: unless ($totalfound) {
487: $r->print('<p>'.&mt('No resources found').'.</p>');
488: }
489: # =================================================== Done going through course
490: $r->print('</body></html>');
491: }
492:
493: # =============================== This pulls up a resource and its dependencies
494:
495: sub checkonthis {
496: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
497: $alreadyseen{$url}=1;
498: $r->rflush();
499: my $result=&Apache::lonnet::metadata($url,'title').' '.
500: &Apache::lonnet::metadata($url,'subject').' '.
501: &Apache::lonnet::metadata($url,'abstract').' '.
502: &Apache::lonnet::metadata($url,'keywords');
503: if (($url) && ($fulltext)) {
504: $result.=&Apache::lonnet::ssi_body($url);
505: }
506: $result=~s/\s+/ /gs;
507: my $applies=0;
508: foreach (@allwords) {
509: if ($_=~/\w/) {
510: if ($result=~/$_/si) {
511: $applies++;
512: }
513: }
514: }
515: # Does this resource apply?
516: if ($applies) {
517: $r->print('<br />');
518: for (my $i=0;$i<=$level*5;$i++) {
519: $r->print(' ');
520: }
521: $r->print('<a href="'.$url.'" target="cat">'.
522: ($title?$title:$url).'</a><br />');
523: $totalfound++;
524: } elsif ($fulltext) {
525: $r->print(' .');
526: }
527: $r->rflush();
528: # Check also the dependencies of this one
529: my $dependencies=
530: &Apache::lonnet::metadata($url,'dependencies');
531: foreach (split(/\,/,$dependencies)) {
532: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
533: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
534: }
535: }
536: }
537:
538: sub untiehash {
539: if (tied(%hash)) {
540: untie(%hash);
541: }
542: }
543:
544: } # End of course search scoping
545:
546: sub search_html_header {
547: my $Str = <<ENDHEADER;
548: <html>
549: <head>
550: <title>The LearningOnline Network with CAPA</title>
551: </head>
552: ENDHEADER
553: return $Str;
554: }
555:
556: ######################################################################
557: ######################################################################
558:
559: =pod
560:
561: =item &print_basic_search_form()
562:
563: Prints the form for the basic search. Sorry the name is so cryptic.
564:
565: =cut
566:
567: ######################################################################
568: ######################################################################
569: sub print_basic_search_form {
570: my ($r,$closebutton,$hidden_fields) = @_;
571: my $result = ($ENV{'form.catalogmode'} ne 'groupsearch');
572: my $bodytag=&Apache::loncommon::bodytag('Search').
573: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Search_Basic',
574: undef,undef,
575: $ENV{'form.catalogmode'} ne 'groupsearch');
576: my $scrout = &search_html_header().$bodytag;
577: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
578: # Define interface components
579: my $userelatedwords=
580: &mt('[_1] use related words',
581: &Apache::lonhtmlcommon::checkbox
582: ('related',$ENV{'form.related'},'related'));
583: my $onlysearchdomain=
584: &mt('[_1] only search domain [_2]',
585: &Apache::lonhtmlcommon::checkbox('domains',
586: $ENV{'form.domains'},
587: $r->dir_config('lonDefDomain')
588: ),
589: $r->dir_config('lonDefDomain')
590: );
591: my $adv_search_link =
592: '<a href="/adm/searchcat?'.
593: 'phase=disp_adv&'.
594: 'catalogmode='.$ENV{'form.catalogmode'}.
595: '&launch='.$ENV{'form.launch'}.
596: '&mode='.$ENV{'form.mode'}.
597: '">'.&mt('Advanced Search').'</a>';
598: #
599: $scrout.='<form name="loncapa_search" method="post" '.
600: 'action="/adm/searchcat">'.
601: '<input type="hidden" name="phase" value="basic_search" />'.
602: $hidden_fields;
603: #
604: $scrout .= '<center>'.$/;
605: if ($ENV{'request.course.id'}) {
606: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
607: } else {
608: # No need to tell them they are searching
609: $scrout.= ('<br />'x2);
610: }
611: $scrout.='<table>'.
612: '<tr><td align="center" valign="top">'.
613: &Apache::lonhtmlcommon::textbox
614: ('basicexp',
615: &HTML::Entities::encode($ENV{'form.basicexp'},'<>&"'),50
616: ).
617: '<br />'.
618: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
619: '<td><font size="-1">'.
620: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
621: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
622: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
623: '</font></td>'.
624: '</tr>'.$/;
625: #
626: $scrout .= '<tr><td align="center" colspan="2">'.
627: '<font size="-1">'.
628: '<input type="submit" name="basicsubmit" '.
629: 'value="'.&mt('Search').'" />'.
630: (' 'x2).$closebutton.(' 'x2).
631: &viewoptions().
632: '</font>'.
633: '</td></tr>'.$/;
634: $scrout .= '</table>'.$/.'</center>'.'</form>';
635: }
636: if ($ENV{'request.course.id'}) {
637: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
638: 'header' => 'Course Search',
639: 'note' => 'Enter terms or phrases, then press "Search" below',
640: 'use' => 'use related words',
641: 'full' =>'fulltext search (time consuming)'
642: );
643: $scrout.=(<<ENDCOURSESEARCH);
644: <form name="loncapa_search" method="post" action="/adm/searchcat">
645: <center>
646: <hr />
647: <h1>$lt{'header'}</h1>
648: <input type="hidden" name="phase" value="course_search" />
649: $hidden_fields
650: <p>
651: $lt{'note'}.
652: </p>
653: <p>
654: <table>
655: <tr><td>
656: ENDCOURSESEARCH
657: $scrout.=' '.
658: &Apache::lonhtmlcommon::textbox('courseexp',
659: $ENV{'form.courseexp'},40);
660: my $crscheckbox =
661: &Apache::lonhtmlcommon::checkbox('crsfulltext',
662: $ENV{'form.crsfulltext'});
663: my $relcheckbox =
664: &Apache::lonhtmlcommon::checkbox('crsrelated',
665: $ENV{'form.crsrelated'});
666: $scrout.=(<<ENDENDCOURSE);
667: </td></tr>
668: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
669: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
670: </table><p>
671: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
672: </p>
673: </center>
674: </form>
675: ENDENDCOURSE
676: }
677: $scrout.=(<<ENDDOCUMENT);
678: </body>
679: </html>
680: ENDDOCUMENT
681: $r->print($scrout);
682: return;
683: }
684: ######################################################################
685: ######################################################################
686:
687: =pod
688:
689: =item &advanced_search_form()
690:
691: Prints the advanced search form.
692:
693: =cut
694:
695: ######################################################################
696: ######################################################################
697: sub print_advanced_search_form{
698: my ($r,$closebutton,$hidden_fields) = @_;
699: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
700: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
701: 'Search_Advanced',
702: undef,undef,
703: $ENV{'form.catalogmode'} ne 'groupsearch');
704: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
705: 'reset' => 'Reset',
706: 'help' => 'Help');
707: my $advanced_buttons=<<"END";
708: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
709: <input type="reset" name="reset" value='$lt{"reset"}' />
710: $closebutton
711: END
712: my $scrout=&search_html_header();
713: $scrout .= <<"ENDHEADER";
714: $bodytag
715: <form method="post" action="/adm/searchcat" name="advsearch">
716: <p>
717: $advanced_buttons
718: ENDHEADER
719: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
720: '<input type="hidden" name="phase" value="adv_search" />';
721: my %fields=&Apache::lonmeta::fieldnames();
722: #
723: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
724: $scrout .= "<table>\n";
725: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
726: (' 'x2).&searchhelp()."</font></td></tr>\n";
727: my %related_word_search =
728: ('title' => 1,
729: 'author' => 0,
730: 'owner' => 0,
731: 'authorspace' => 0,
732: 'modifyinguser'=> 0,
733: 'keywords' => 1,
734: 'notes' => 1,
735: 'abstract' => 1,
736: 'standards'=> 1,
737: 'mime' => 1,
738: );
739: #
740: foreach my $field ('title','author','owner','authorspace','modifyinguser',
741: 'keywords','notes','abstract','standards','mime') {
742: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
743: &Apache::lonmeta::prettyinput($field,
744: $ENV{'form.'.$field},
745: $field,
746: 'advsearch',
747: $related_word_search{$field},
748: '</td><td align="left">',
749: $ENV{'form.'.$field.'_related'},
750: 50);
751: if ($related_word_search{$field}) {
752: $scrout .= 'related words';
753: } else {
754: $scrout .= '</td><td> ';
755: }
756: $scrout .= '</td></tr>'.$/;
757: }
758: foreach my $field ('lowestgradelevel','highestgradelevel') {
759: $scrout.='<tr>'.
760: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
761: '<td colspan="2">'.
762: &Apache::lonmeta::prettyinput($field,
763: $ENV{'form.'.$field},
764: $field,
765: 'advsearch',
766: 0).
767: '</td></tr>'.$/;
768: }
769: $scrout.='<tr><td align="right">'.
770: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
771: &Apache::loncommon::filecategoryselect('category',
772: $ENV{'form.category'}).
773: '</td></tr>'.$/;
774: $scrout.='<tr><td align="right" valign="top">'.
775: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
776: &Apache::loncommon::domain_select('domains',
777: $ENV{'form.domains'},1).
778: '</td></tr>'.$/;
779: #
780: # Misc metadata
781: $scrout.='<tr><td align="right" valign="top">'.
782: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
783: &Apache::lonmeta::selectbox('copyright',
784: '',,
785: \&Apache::loncommon::copyrightdescription,
786: ( undef,
787: &Apache::loncommon::copyrightids)
788: ).'</td></tr>'.$/;
789: $scrout.='<tr><td align="right" valign="top">'.
790: &titlefield(&mt('Language')).'</td><td colspan="2">'.
791: &Apache::lonmeta::selectbox('language',
792: 'notset',,
793: \&Apache::loncommon::languagedescription,
794: ('any',&Apache::loncommon::languageids)
795: ).'</td></tr>';
796: $scrout .= "</table>\n";
797: #
798: # Dynamic metadata
799: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
800: $scrout .= "<table>\n";
801: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
802: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
803: foreach my $statistic
804: ({ name=>'count',
805: description=>'Network-wide number of accesses (hits)',},
806: { name=>'stdno',
807: description=>
808: 'Total number of students who have worked on this problem',},
809: { name => 'avetries',
810: description=>'Average number of tries till solved',},
811: { name => 'difficulty',
812: description=>'Degree of difficulty',},
813: { name => 'disc',
814: description=>'Degree of discrimination'}) {
815: $scrout .= '<tr><td align="right">'.
816: &titlefield(&mt($statistic->{'description'})).
817: '</td><td align="center">'.
818: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
819: 'value="" size="6" />'.
820: '</td><td align="center">'.
821: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
822: 'value="" size="6" />'.
823: '</td></tr>'.$/;
824: }
825: $scrout .= "</table>\n";
826: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
827: $scrout .= "<table>\n";
828: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
829: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
830: foreach my $evaluation
831: ( { name => 'clear',
832: description => 'Material presented in clear way'},
833: { name =>'depth',
834: description => 'Material covered with sufficient depth'},
835: { name => 'helpful',
836: description => 'Material is helpful'},
837: { name => 'correct',
838: description => 'Material appears to be correct'},
839: { name => 'technical',
840: description => 'Resource is technically correct'}){
841: $scrout .= '<tr><td align="right">'.
842: &titlefield(&mt($evaluation->{'description'})).
843: '</td><td align="center">'.
844: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
845: 'value="" size="6" />'.
846: '</td><td align="center">'.
847: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
848: 'value="" size="6" />'.
849: '</td></tr>'.$/;
850: }
851: $scrout .= "</table>\n";
852: #
853: # Creation/Modification date limits
854: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
855: $scrout .= "\n<table>\n";
856: my $cafter =
857: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
858: 'creationdate1', # fieldname
859: 0, # current value
860: '', # special
861: 1, # includeempty
862: '', # state
863: 1, # no_hh_mm_ss
864: );
865: my $cbefore =
866: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
867: 'creationdate2', # fieldname
868: 0, # current value
869: '', # special
870: 1, # includeempty
871: '', # state
872: 1, # no_hh_mm_ss
873: );
874: $scrout .= &mt('<tr><td align="right">Created between</td>'.
875: '<td>[_1]</td></tr>'.
876: '<tr><td align="right">and </td>'.
877: '<td>[_2]</td></tr>',$cafter,$cbefore);
878: my $lafter =
879: &Apache::lonhtmlcommon::date_setter('advsearch',
880: 'revisiondate1',
881: 0, # current value
882: '', # special
883: 1, # includeempty
884: '', # state
885: 1, # no_hh_mm_ss
886: );
887: my $lbefore =
888: &Apache::lonhtmlcommon::date_setter('advsearch',
889: 'revisiondate2',
890: 0, # current value
891: '', # special
892: 1, # includeempty
893: '', # state
894: 1, # no_hh_mm_ss
895: );
896: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
897: '<td>[_1]</td></tr>'.
898: '<tr><td align="right">and</td>'.
899: '<td>[_2]</td></tr>',$lafter,$lbefore);
900: $scrout.="</table>\n";
901: $scrout.=<<ENDDOCUMENT;
902: $advanced_buttons
903: </form>
904: </body>
905: </html>
906: ENDDOCUMENT
907: $r->print($scrout);
908: return;
909: }
910:
911: ######################################################################
912: ######################################################################
913:
914: =pod
915:
916: =item &titlefield()
917:
918: Inputs: title text
919:
920: Outputs: titletext with font wrapper
921:
922: =cut
923:
924: ######################################################################
925: ######################################################################
926: sub titlefield {
927: my $title=shift;
928: return $title;
929: }
930:
931: ######################################################################
932: ######################################################################
933:
934: =pod
935:
936: =item viewoptiontext()
937:
938: Inputs: codename for view option
939:
940: Outputs: displayed text
941:
942: =cut
943:
944: ######################################################################
945: ######################################################################
946: sub viewoptiontext {
947: my $code=shift;
948: my %desc=&Apache::lonlocal::texthash
949: ('detailed' => "Detailed Citation View",
950: 'xml' => 'XML/SGML',
951: 'compact' => 'Compact View',
952: 'fielded' => 'Fielded Format',
953: 'summary' => 'Summary View');
954: return $desc{$code};
955: }
956:
957: ######################################################################
958: ######################################################################
959:
960: =pod
961:
962: =item viewoptions()
963:
964: Inputs: none
965:
966: Outputs: text for box with view options
967:
968: =cut
969:
970: ######################################################################
971: ######################################################################
972: sub viewoptions {
973: my $scrout;
974: if (! defined($ENV{'form.viewselect'})) {
975: $ENV{'form.viewselect'}='detailed';
976: }
977: $scrout.=&Apache::lonmeta::selectbox('viewselect',
978: $ENV{'form.viewselect'},
979: \&viewoptiontext,
980: sort(keys(%Views)));
981: $scrout.= ' ';
982: my $countselect = &Apache::lonmeta::selectbox('show',
983: $ENV{'form.show'},
984: undef,
985: (10,20,50,100,1000,10000));
986: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
987: '</nobr>'.$/;
988: return $scrout;
989: }
990:
991: ######################################################################
992: ######################################################################
993:
994: =pod
995:
996: =item searchhelp()
997:
998: Inputs: none
999:
1000: Outputs: return little blurb on how to enter searches
1001:
1002: =cut
1003:
1004: ######################################################################
1005: ######################################################################
1006: sub searchhelp {
1007: return &mt('Enter words and quoted phrases');
1008: }
1009:
1010: ######################################################################
1011: ######################################################################
1012:
1013: =pod
1014:
1015: =item &get_persistent_form_data()
1016:
1017: Inputs: filename of database
1018:
1019: Outputs: returns undef on database errors.
1020:
1021: This function is the reverse of &make_persistent() for form data.
1022: Retrieve persistent data from %persistent_db. Retrieved items will have their
1023: values unescaped. If a form value already exists in $ENV, it will not be
1024: overwritten. Form values that are array references may have values appended
1025: to them.
1026:
1027: =cut
1028:
1029: ######################################################################
1030: ######################################################################
1031: sub get_persistent_form_data {
1032: my $filename = shift;
1033: return 0 if (! -e $filename);
1034: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1035: &GDBM_READER(),0640));
1036: #
1037: # These make sure we do not get array references printed out as 'values'.
1038: my %arrays_allowed = ('form.domains'=>1);
1039: #
1040: # Loop through the keys, looking for 'form.'
1041: foreach my $name (keys(%persistent_db)) {
1042: next if ($name !~ /^form./);
1043: # Kludgification begins!
1044: if ($name eq 'form.domains' &&
1045: $ENV{'form.searchmode'} eq 'basic' &&
1046: $ENV{'form.phase'} ne 'disp_basic') {
1047: next;
1048: }
1049: # End kludge (hopefully)
1050: next if (exists($ENV{$name}));
1051: my @values = map {
1052: &Apache::lonnet::unescape($_);
1053: } split(',',$persistent_db{$name});
1054: next if (@values <1);
1055: if ($arrays_allowed{$name}) {
1056: $ENV{$name} = [@values];
1057: } else {
1058: $ENV{$name} = $values[0] if ($values[0]);
1059: }
1060: }
1061: untie (%persistent_db);
1062: return 1;
1063: }
1064:
1065: ######################################################################
1066: ######################################################################
1067:
1068: =pod
1069:
1070: =item &get_persistent_data()
1071:
1072: Inputs: filename of database, ref to array of values to recover.
1073:
1074: Outputs: array of values. Returns undef on error.
1075:
1076: This function is the reverse of &make_persistent();
1077: Retrieve persistent data from %persistent_db. Retrieved items will have their
1078: values unescaped. If the item contains commas (before unescaping), the
1079: returned value will be an array pointer.
1080:
1081: =cut
1082:
1083: ######################################################################
1084: ######################################################################
1085: sub get_persistent_data {
1086: my $filename = shift;
1087: my @Vars = @{shift()};
1088: my @Values; # Return array
1089: return undef if (! -e $filename);
1090: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1091: &GDBM_READER(),0640));
1092: foreach my $name (@Vars) {
1093: if (! exists($persistent_db{$name})) {
1094: push @Values, undef;
1095: next;
1096: }
1097: my @values = map {
1098: &Apache::lonnet::unescape($_);
1099: } split(',',$persistent_db{$name});
1100: if (@values <= 1) {
1101: push @Values,$values[0];
1102: } else {
1103: push @Values,\@values;
1104: }
1105: }
1106: untie (%persistent_db);
1107: return @Values;
1108: }
1109:
1110: ######################################################################
1111: ######################################################################
1112:
1113: =pod
1114:
1115: =item &make_persistent()
1116:
1117: Inputs: Hash of values to save, filename of persistent database.
1118:
1119: Store variables away to the %persistent_db.
1120: Values will be escaped. Values that are array pointers will have their
1121: elements escaped and concatenated in a comma separated string.
1122:
1123: =cut
1124:
1125: ######################################################################
1126: ######################################################################
1127: sub make_persistent {
1128: my %save = %{shift()};
1129: my $filename = shift;
1130: return undef if (! tie(%persistent_db,'GDBM_File',
1131: $filename,&GDBM_WRCREAT(),0640));
1132: foreach my $name (keys(%save)) {
1133: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1134: # We handle array references, but not recursively.
1135: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1136: $persistent_db{$name} = $store;
1137: }
1138: untie(%persistent_db);
1139: return 1;
1140: }
1141:
1142: ######################################################################
1143: ######################################################################
1144:
1145: =pod
1146:
1147: =item &make_form_data_persistent()
1148:
1149: Inputs: filename of persistent database.
1150:
1151: Store most form variables away to the %persistent_db.
1152: Values will be escaped. Values that are array pointers will have their
1153: elements escaped and concatenated in a comma separated string.
1154:
1155: =cut
1156:
1157: ######################################################################
1158: ######################################################################
1159: sub make_form_data_persistent {
1160: my $r = shift;
1161: my $filename = shift;
1162: my %save;
1163: foreach (keys(%ENV)) {
1164: next if (!/^form/ || /submit/);
1165: $save{$_} = $ENV{$_};
1166: }
1167: return &make_persistent(\%save,$filename);
1168: }
1169:
1170: ######################################################################
1171: ######################################################################
1172:
1173: =pod
1174:
1175: =item &parse_advanced_search()
1176:
1177: Parse advanced search form and return the following:
1178:
1179: =over 4
1180:
1181: =item $query Scalar containing an SQL query.
1182:
1183: =item $customquery Scalar containing a custom query.
1184:
1185: =item $customshow Scalar containing commands to show custom metadata.
1186:
1187: =item $libraries_to_query Reference to array of domains to search.
1188:
1189: =back
1190:
1191: =cut
1192:
1193: ######################################################################
1194: ######################################################################
1195: sub parse_advanced_search {
1196: my ($r,$closebutton,$hidden_fields)=@_;
1197: my @BasicFields = ('title','author','subject','keywords','url','version',
1198: 'notes','abstract','extension','owner','authorspace',
1199: # 'custommetadata','customshow',
1200: 'modifyinguser','standards','mime');
1201: my @StatsFields = &statfields();
1202: my @EvalFields = &evalfields();
1203: my $fillflag=0;
1204: my $pretty_search_string = "<br />\n";
1205: # Clean up fields for safety
1206: for my $field (@BasicFields,
1207: 'creationdatestart_month','creationdatestart_day',
1208: 'creationdatestart_year','creationdateend_month',
1209: 'creationdateend_day','creationdateend_year',
1210: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1211: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1212: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1213: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1214: }
1215: foreach ('mode','form','element') {
1216: # is this required? Hmmm.
1217: next if (! exists($ENV{'form.'.$_}));
1218: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1219: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1220: }
1221: # Preprocess the category form element.
1222: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1223: ref($ENV{'form.category'}));
1224: #
1225: # Check to see if enough information was filled in
1226: foreach my $field (@BasicFields) {
1227: if (&filled($ENV{'form.'.$field})) {
1228: $fillflag++;
1229: }
1230: }
1231: foreach my $field (@StatsFields,@EvalFields) {
1232: if (&filled($ENV{'form.'.$field.'_max'})) {
1233: $fillflag++;
1234: }
1235: if (&filled($ENV{'form.'.$field.'_min'})) {
1236: $fillflag++;
1237: }
1238: }
1239:
1240: for my $field ('lowestgradelevel','highestgradelevel') {
1241: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1242: $ENV{'form.'.$field} > 0) {
1243: $fillflag++;
1244: }
1245: }
1246: if (! $fillflag) {
1247: &output_blank_field_error($r,$closebutton,
1248: 'phase=disp_adv',$hidden_fields);
1249: return ;
1250: }
1251: # Turn the form input into a SQL-based query
1252: my $query='';
1253: my @queries;
1254: my $font = '<font color="#800000" face="helvetica">';
1255: # Evaluate logical expression AND/OR/NOT phrase fields.
1256: foreach my $field (@BasicFields) {
1257: next if (!defined($ENV{'form.'.$field}) || $ENV{'form.'.$field} eq '');
1258: my ($error,$SQLQuery) =
1259: &process_phrase_input($ENV{'form.'.$field},
1260: $ENV{'form.'.$field.'_related'},$field);
1261: if (defined($error)) {
1262: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1263: $hidden_fields,$field);
1264: return;
1265: } else {
1266: $pretty_search_string .=
1267: $font.$field.'</font>: '.$ENV{'form.'.$field};
1268: if ($ENV{'form.'.$field.'_related'}) {
1269: my @Words =
1270: &Apache::loncommon::get_related_words
1271: ($ENV{'form.'.$field});
1272: if (@Words) {
1273: $pretty_search_string.= ' with related words: '.
1274: join(', ',@Words[0..4]);
1275: } else {
1276: $pretty_search_string.= ' with related words.';
1277: }
1278: }
1279: $pretty_search_string .= '<br />';
1280: push (@queries,$SQLQuery);
1281: }
1282: }
1283: #
1284: # Make the 'mime' from 'form.category' and 'form.extension'
1285: #
1286: my $searchphrase;
1287: if (exists($ENV{'form.category'}) &&
1288: $ENV{'form.category'} !~ /^\s*$/ &&
1289: $ENV{'form.category'} ne 'any') {
1290: my @extensions = &Apache::loncommon::filecategorytypes
1291: ($ENV{'form.category'});
1292: if (scalar(@extensions) > 0) {
1293: $searchphrase = join(' OR ',@extensions);
1294: }
1295: }
1296: if (defined($searchphrase)) {
1297: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1298: push @queries,$SQLsearch;
1299: $pretty_search_string .=$font.'mime</font> contains <b>'.
1300: $searchphrase.'</b><br />';
1301: }
1302: #
1303: # Evaluate option lists
1304: if ($ENV{'form.lowestgradelevel'} &&
1305: $ENV{'form.lowestgradelevel'} ne '0' &&
1306: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1307: push(@queries,
1308: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1309: $pretty_search_string.="lowestgradelevel>=".
1310: $ENV{'form.lowestgradelevel'}."<br />\n";
1311: }
1312: if ($ENV{'form.highestgradelevel'} &&
1313: $ENV{'form.highestgradelevel'} ne '0' &&
1314: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1315: push(@queries,
1316: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1317: $pretty_search_string.="highestgradelevel<=".
1318: $ENV{'form.highestgradelevel'}."<br />\n";
1319: }
1320: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1321: push @queries,"(language like \"$ENV{'form.language'}\")";
1322: $pretty_search_string.=$font."language</font>= ".
1323: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1324: "<br />\n";
1325: }
1326: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1327: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1328: $pretty_search_string.=$font."copyright</font> = ".
1329: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1330: "<br \>\n";
1331: }
1332: #
1333: # Statistics
1334: foreach my $field (@StatsFields,@EvalFields) {
1335: my ($min,$max);
1336: if (exists($ENV{'form.'.$field.'_min'}) &&
1337: $ENV{'form.'.$field.'_min'} ne '') {
1338: $min = $ENV{'form.'.$field.'_min'};
1339: }
1340: if (exists($ENV{'form.'.$field.'_max'}) &&
1341: $ENV{'form.'.$field.'_max'} ne '') {
1342: $max = $ENV{'form.'.$field.'_max'};
1343: }
1344: next if (! defined($max) && ! defined($min));
1345: if (defined($min) && defined($max)) {
1346: ($min,$max) = sort {$a <=>$b} ($min,$max);
1347: }
1348: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1349: push(@queries,'('.$field.'>'.$min.')');
1350: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1351: }
1352: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1353: push(@queries,'('.$field.'<'.$max.')');
1354: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1355: }
1356: }
1357: #
1358: # Evaluate date windows
1359: my $cafter =
1360: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1361: my $cbefore =
1362: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1363: if ($cafter > $cbefore) {
1364: my $tmp = $cafter;
1365: $cafter = $cbefore;
1366: $cbefore = $tmp;
1367: }
1368: my $mafter =
1369: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1370: my $mbefore =
1371: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1372: if ($mafter > $mbefore) {
1373: my $tmp = $mafter;
1374: $mafter = $mbefore;
1375: $mbefore = $tmp;
1376: }
1377: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1378: $mafter,$mbefore);
1379: if (defined($error)) {
1380: &output_date_error($r,$error,$closebutton,$hidden_fields);
1381: } elsif (defined($datequery)) {
1382: # Here is where you would set up pretty_search_string to output
1383: # date query information.
1384: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1385: push @queries,$datequery;
1386: }
1387: #
1388: # Process form information for custom metadata querying
1389: my $customquery=undef;
1390: ##
1391: ## The custom metadata search was removed q long time ago mostly
1392: ## because I was unable to figureout exactly how it worked and could
1393: ## not imagine people actually using it. MH
1394: ##
1395: # if ($ENV{'form.custommetadata'}) {
1396: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1397: # $ENV{'form.custommetadata'}."</b><br />\n";
1398: # $customquery=&build_custommetadata_query('custommetadata',
1399: # $ENV{'form.custommetadata'});
1400: # }
1401: my $customshow=undef;
1402: # if ($ENV{'form.customshow'}) {
1403: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1404: # $ENV{'form.customshow'}."</b><br />\n";
1405: # $customshow=$ENV{'form.customshow'};
1406: # $customshow=~s/[^\w\s]//g;
1407: # my @fields=split(/\s+/,$customshow);
1408: # $customshow=join(" ",@fields);
1409: # }
1410: ##
1411: ## Deal with restrictions to given domains
1412: ##
1413: my ($libraries_to_query,$pretty_domains_string) =
1414: &parse_domain_restrictions();
1415: $pretty_search_string .= $pretty_domains_string."<br />\n";
1416: #
1417: if (@queries) {
1418: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1419: } elsif ($customquery) {
1420: $query = '';
1421: }
1422: # &Apache::lonnet::logthis('query = '.$/.$query);
1423: return ($query,$customquery,$customshow,$libraries_to_query,
1424: $pretty_search_string);
1425: }
1426:
1427: sub parse_domain_restrictions {
1428: my $libraries_to_query = undef;
1429: # $ENV{'form.domains'} can be either a scalar or an array reference.
1430: # We need an array.
1431: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1432: return (undef,'');
1433: }
1434: my @allowed_domains;
1435: if (ref($ENV{'form.domains'})) {
1436: @allowed_domains = @{$ENV{'form.domains'}};
1437: } else {
1438: @allowed_domains = ($ENV{'form.domains'});
1439: }
1440: #
1441: my %domain_hash = ();
1442: my $pretty_domains_string;
1443: foreach (@allowed_domains) {
1444: $domain_hash{$_}++;
1445: }
1446: if ($domain_hash{'any'}) {
1447: $pretty_domains_string = "In all LON-CAPA domains.";
1448: } else {
1449: if (@allowed_domains > 1) {
1450: $pretty_domains_string = "In LON-CAPA domains:";
1451: } else {
1452: $pretty_domains_string = "In LON-CAPA domain ";
1453: }
1454: foreach (sort @allowed_domains) {
1455: $pretty_domains_string .= "<b>".$_."</b> ";
1456: }
1457: foreach (keys(%Apache::lonnet::libserv)) {
1458: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1459: push @$libraries_to_query,$_;
1460: }
1461: }
1462: }
1463: return ($libraries_to_query,$pretty_domains_string);
1464: }
1465:
1466: ######################################################################
1467: ######################################################################
1468:
1469: =pod
1470:
1471: =item &parse_basic_search()
1472:
1473: Parse the basic search form and return a scalar containing an sql query.
1474:
1475: =cut
1476:
1477: ######################################################################
1478: ######################################################################
1479: sub parse_basic_search {
1480: my ($r,$closebutton)=@_;
1481: #
1482: # Clean up fields for safety
1483: for my $field ('basicexp') {
1484: $ENV{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-]//g;
1485: }
1486: foreach ('mode','form','element') {
1487: # is this required? Hmmm.
1488: next unless (exists($ENV{"form.$_"}));
1489: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1490: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1491: }
1492: my ($libraries_to_query,$pretty_domains_string) =
1493: &parse_domain_restrictions();
1494: #
1495: # Check to see if enough of a query is filled in
1496: my $search_string = $ENV{'form.basicexp'};
1497: if (! &filled($search_string)) {
1498: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1499: return OK;
1500: }
1501: my $pretty_search_string=$search_string;
1502: my @Queries;
1503: my $searchfield = 'concat_ws(" ",'.join(',',
1504: ('title','author','subject',
1505: 'notes','abstract','keywords')
1506: ).')';
1507: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1508: $ENV{'form.related'},
1509: $searchfield);
1510: if ($error) {
1511: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1512: '','basicexp');
1513: return;
1514: }
1515: push(@Queries,$SQLQuery);
1516: #foreach my $q (@Queries) {
1517: # &Apache::lonnet::logthis(' '.$q);
1518: #}
1519: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1520: #
1521: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1522: $pretty_search_string .= ' '.$pretty_domains_string;
1523: }
1524: $pretty_search_string .= "<br />\n";
1525: $pretty_search_string =~ s:^<br /> and ::;
1526: # &Apache::lonnet::logthis($final_query);
1527: return ($final_query,$pretty_search_string,
1528: $libraries_to_query);
1529: }
1530:
1531:
1532: ###############################################################
1533: ###############################################################
1534:
1535: my @Phrases;
1536:
1537: sub concat {
1538: my ($item) = @_;
1539: my $results = '';
1540: foreach (@$item) {
1541: if (ref($_) eq 'ARRAY') {
1542: $results .= join(' ',@$_);
1543: }
1544: }
1545: return $results;
1546: }
1547:
1548: sub process_phrase_input {
1549: my ($phrase,$related,$field)=@_;
1550: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1551: my $grammar = <<'ENDGRAMMAR';
1552: searchphrase:
1553: expression /^\Z/ {
1554: # &Apache::lonsearchcat::print_item(\@item,0);
1555: [@item];
1556: }
1557: expression:
1558: phrase(s) {
1559: [@item];
1560: }
1561: phrase:
1562: orword {
1563: [@item];
1564: }
1565: | andword {
1566: [@item];
1567: }
1568: | minusword {
1569: unshift(@::Phrases,$item[1]->[0]);
1570: unshift(@::Phrases,$item[1]->[1]);
1571: [@item];
1572: }
1573: | word {
1574: unshift(@::Phrases,$item[1]);
1575: [@item];
1576: }
1577: #
1578: orword:
1579: word 'OR' phrase {
1580: unshift(@::Phrases,'OR');
1581: unshift(@::Phrases,$item[1]);
1582: [@item];
1583: }
1584: | word 'or' phrase {
1585: unshift(@::Phrases,'OR');
1586: unshift(@::Phrases,$item[1]);
1587: [@item];
1588: }
1589: | minusword 'OR' phrase {
1590: unshift(@::Phrases,'OR');
1591: unshift(@::Phrases,$item[1]->[0]);
1592: unshift(@::Phrases,$item[1]->[1]);
1593: [@item];
1594: }
1595: | minusword 'or' phrase {
1596: unshift(@::Phrases,'OR');
1597: unshift(@::Phrases,$item[1]->[0]);
1598: unshift(@::Phrases,$item[1]->[1]);
1599: [@item];
1600: }
1601: andword:
1602: word phrase {
1603: unshift(@::Phrases,'AND');
1604: unshift(@::Phrases,$item[1]);
1605: [@item];
1606: }
1607: | minusword phrase {
1608: unshift(@::Phrases,'AND');
1609: unshift(@::Phrases,$item[1]->[0]);
1610: unshift(@::Phrases,$item[1]->[1]);
1611: [@item];
1612: }
1613: #
1614: minusword:
1615: '-' word {
1616: [$item[2],'NOT'];
1617: }
1618: word:
1619: "'" term(s) "'" {
1620: &Apache::lonsearchcat::concat(\@item);
1621: }
1622: | '"' term(s) '"' {
1623: &Apache::lonsearchcat::concat(\@item);
1624: }
1625: | term {
1626: $item[1];
1627: }
1628: term:
1629: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E]+/ {
1630: $item[1];
1631: }
1632: ENDGRAMMAR
1633: #
1634: # The end result of parsing the phrase with the grammar is an array
1635: # @::Phrases.
1636: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1637: # $phrase = "genetic engineering" -dna ->
1638: # "genetic engineering","AND","NOT","dna"
1639: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1640: undef(@::Phrases);
1641: my $p = new Parse::RecDescent($grammar);
1642: if (! defined($p->searchphrase($phrase))) {
1643: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1644: return 'Unable to process phrase '.$phrase;
1645: }
1646: #
1647: # Go through the phrases and make sense of them.
1648: # Apply modifiers NOT OR and AND to the phrases.
1649: my @NewPhrases;
1650: while(@::Phrases) {
1651: my $phrase = shift(@::Phrases);
1652: # &Apache::lonnet::logthis('phrase = '.$phrase);
1653: my $phrasedata;
1654: if ($phrase =~ /^(NOT|OR|AND)$/) {
1655: if ($phrase eq 'OR') {
1656: $phrasedata->{'or'}++;
1657: if (! @::Phrases) { $phrasedata = undef; last; }
1658: $phrase = shift(@::Phrases);
1659: } elsif ($phrase eq 'AND') {
1660: $phrasedata->{'and'}++;
1661: if (! @::Phrases) { $phrasedata = undef; last; }
1662: $phrase = shift(@::Phrases);
1663: }
1664: if ($phrase eq 'NOT') {
1665: $phrasedata->{'negate'}++;
1666: if (! @::Phrases) { $phrasedata = undef; last; }
1667: $phrase = shift(@::Phrases);
1668: }
1669: }
1670: $phrasedata->{'phrase'} = $phrase;
1671: if ($related) {
1672: my @NewWords;
1673: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1674: $phrasedata->{'related_words'} = \@NewWords;
1675: }
1676: push(@NewPhrases,$phrasedata);
1677: }
1678: #
1679: # Actually build the sql query from the phrases
1680: my $SQLQuery;
1681: foreach my $phrase (@NewPhrases) {
1682: my $query;
1683: if ($phrase->{'negate'}) {
1684: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1685: } else {
1686: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1687: }
1688: foreach my $related (@{$phrase->{'related_words'}}) {
1689: if ($phrase->{'negate'}) {
1690: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1691: } else {
1692: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1693: }
1694: }
1695: if ($SQLQuery) {
1696: if ($phrase->{'or'}) {
1697: $SQLQuery .= ' OR ('.$query.')';
1698: } else {
1699: $SQLQuery .= ' AND ('.$query.')';
1700: }
1701: } else {
1702: $SQLQuery = '('.$query.')';
1703: }
1704: }
1705: #
1706: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1707: #
1708: return undef,$SQLQuery;
1709: }
1710:
1711: ######################################################################
1712: ######################################################################
1713:
1714: =pod
1715:
1716: =item &related_version()
1717:
1718: Modifies an input string to include related words. Words in the string
1719: are replaced with parenthesized lists of 'OR'd words. For example
1720: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1721:
1722: Note: Using this twice on a string is probably silly.
1723:
1724: =cut
1725:
1726: ######################################################################
1727: ######################################################################
1728: sub related_version {
1729: my ($word) = @_;
1730: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1731: my @Words = &Apache::loncommon::get_related_words($word);
1732: # Only use 4 related words
1733: @Words = ($#Words>4? @Words[0..4] : @Words);
1734: my $result = join " OR ", ($word,@Words);
1735: return $result,sort(@Words);
1736: }
1737:
1738:
1739: ######################################################################
1740: ######################################################################
1741:
1742: =pod
1743:
1744: =item &build_custommetadata_query()
1745:
1746: Constructs a custom metadata query using a rather heinous regular
1747: expression.
1748:
1749: =cut
1750:
1751: ######################################################################
1752: ######################################################################
1753: sub build_custommetadata_query {
1754: my ($field_name,$logic_statement)=@_;
1755: my $q=new Text::Query('abc',
1756: -parse => 'Text::Query::ParseAdvanced',
1757: -build => 'Text::Query::BuildAdvancedString');
1758: $q->prepare($logic_statement);
1759: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1760: # quick fix to change literal into xml tag-matching
1761: # will eventually have to write a separate builder module
1762: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1763: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1764: /\\<$1\\>?# \<wordone\>
1765: \[\^\\<\]?# [^\<]
1766: \*$2\[\^\\<\]?# *wordtwo[^\<]
1767: \*\\<\\\/$1\\>?# *\<\/wordone\>
1768: /g;
1769: return $matchexp;
1770: }
1771:
1772:
1773: ######################################################################
1774: ######################################################################
1775:
1776: =pod
1777:
1778: =item &build_date_queries()
1779:
1780: Builds a SQL logic query to check time/date entries.
1781: Also reports errors (check for /^Incorrect/).
1782:
1783: =cut
1784:
1785: ######################################################################
1786: ######################################################################
1787: sub build_date_queries {
1788: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1789: my ($result,$error,$pretty_string);
1790: #
1791: # Verify the input
1792: if (! defined($cafter) && ! defined($cbefore) &&
1793: ! defined($mafter) && ! defined($mbefore)) {
1794: # This is an okay situation, so return undef for the error
1795: return (undef,undef,undef);
1796: }
1797: if ((defined($cafter) && ! defined($cbefore)) ||
1798: (defined($cbefore) && ! defined($cafter))) {
1799: # This is bad, so let them know
1800: $error = &mt('Incorrect entry for the creation date. '.
1801: 'You must specify both the beginning and ending dates.');
1802: }
1803: if (! defined($error) &&
1804: ((defined($mafter) && ! defined($mbefore)) ||
1805: (defined($mbefore) && ! defined($mafter)))) {
1806: # This is also bad, so let them know
1807: $error = &mt('Incorrect entry for the last revision date. '.
1808: 'You must specify both the beginning and ending dates.');
1809: }
1810: if (! defined($error)) {
1811: #
1812: # Build the queries
1813: my @queries;
1814: if (defined($cbefore) && defined($cafter)) {
1815: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1816: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1817: # Correct for year being relative to 1900
1818: $cayear+=1900; $cbyear+=1900;
1819: my $cquery=
1820: '(creationdate BETWEEN '.
1821: "'".$cayear.'-'.$camon.'-'.$caday."'".
1822: ' AND '.
1823: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1824: $pretty_string .= '<br />' if (defined($pretty_string));
1825: $pretty_string .=
1826: &mt('created between [_1] and [_2]',
1827: &Apache::lonlocal::locallocaltime($cafter),
1828: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1829: push(@queries,$cquery);
1830: $pretty_string =~ s/ 00:00:00//g;
1831: }
1832: if (defined($mbefore) && defined($mafter)) {
1833: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1834: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1835: # Correct for year being relative to 1900
1836: $mayear+=1900; $mbyear+=1900;
1837: my $mquery=
1838: '(lastrevisiondate BETWEEN '.
1839: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1840: ' AND '.
1841: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1842: push(@queries,$mquery);
1843: $pretty_string .= '<br />' if (defined($pretty_string));
1844: $pretty_string .=
1845: &mt('last revised between [_1] and [_2]',
1846: &Apache::lonlocal::locallocaltime($mafter),
1847: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1848: $pretty_string =~ s/ 00:00:00//g;
1849: }
1850: if (@queries) {
1851: $result .= join(" AND ",@queries);
1852: }
1853: }
1854: return ($result,$error,$pretty_string);
1855: }
1856:
1857: ######################################################################
1858: ######################################################################
1859:
1860: =pod
1861:
1862: =item ©right_check()
1863:
1864: Inputs: $Metadata, a hash pointer of metadata for a resource.
1865:
1866: Returns: 1 if the resource is available to the user making the query,
1867: 0 otherwise.
1868:
1869: =cut
1870:
1871: ######################################################################
1872: ######################################################################
1873: sub copyright_check {
1874: my $Metadata = shift;
1875: # Check copyright tags and skip results the user cannot use
1876: my (undef,undef,$resdom,$resname) = split('/',
1877: $Metadata->{'url'});
1878: # Check for priv
1879: if (($Metadata->{'copyright'} eq 'priv') &&
1880: (($ENV{'user.name'} ne $resname) &&
1881: ($ENV{'user.domain'} ne $resdom))) {
1882: return 0;
1883: }
1884: # Check for domain
1885: if (($Metadata->{'copyright'} eq 'domain') &&
1886: ($ENV{'user.domain'} ne $resdom)) {
1887: return 0;
1888: }
1889: return 1;
1890: }
1891:
1892: ######################################################################
1893: ######################################################################
1894:
1895: =pod
1896:
1897: =item &ensure_db_and_table()
1898:
1899: Ensure we can get lonmysql to connect to the database and the table we
1900: need exists.
1901:
1902: Inputs: $r, table id
1903:
1904: Returns: undef on error, 1 if the table exists.
1905:
1906: =cut
1907:
1908: ######################################################################
1909: ######################################################################
1910: sub ensure_db_and_table {
1911: my ($r,$table) = @_;
1912: ##
1913: ## Sanity check the table id.
1914: ##
1915: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1916: $r->print("Unable to retrieve search results. ".
1917: "Unable to determine the table results were stored in. ".
1918: "</body></html>");
1919: return undef;
1920: }
1921: ##
1922: ## Make sure we can connect and the table exists.
1923: ##
1924: my $connection_result = &Apache::lonmysql::connect_to_db();
1925: if (!defined($connection_result)) {
1926: $r->print("Unable to connect to the MySQL database where your results".
1927: " are stored. </body></html>");
1928: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1929: " connect to database.");
1930: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1931: return undef;
1932: }
1933: my $table_check = &Apache::lonmysql::check_table($table);
1934: if (! defined($table_check)) {
1935: $r->print("A MySQL error has occurred.</form></body></html>");
1936: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1937: " of table ".$table);
1938: return undef;
1939: } elsif (! $table_check) {
1940: $r->print("The table of results could not be found.");
1941: &Apache::lonnet::logthis("The user requested a table, ".$table.
1942: ", that could not be found.");
1943: return undef;
1944: }
1945: return 1;
1946: }
1947:
1948: ######################################################################
1949: ######################################################################
1950:
1951: =pod
1952:
1953: =item &print_sort_form()
1954:
1955: The sort feature is not implemented at this time. This form just prints
1956: a link to change the search query.
1957:
1958: =cut
1959:
1960: ######################################################################
1961: ######################################################################
1962: sub print_sort_form {
1963: my ($r,$pretty_query_string) = @_;
1964: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1).
1965: &Apache::lonhtmlcommon::breadcrumbs
1966: (undef,'Searching','Searching',undef,undef,
1967: $ENV{'form.catalogmode'} ne 'groupsearch');
1968:
1969: ##
1970: my %SortableFields=&Apache::lonlocal::texthash(
1971: id => 'Default',
1972: title => 'Title',
1973: author => 'Author',
1974: subject => 'Subject',
1975: url => 'URL',
1976: version => 'Version Number',
1977: mime => 'Mime type',
1978: lang => 'Language',
1979: owner => 'Owner/Publisher',
1980: copyright => 'Copyright',
1981: hostname => 'Host',
1982: creationdate => 'Creation Date',
1983: lastrevisiondate => 'Revision Date'
1984: );
1985: ##
1986: my $table = $ENV{'form.table'};
1987: return if (! &ensure_db_and_table($r,$table));
1988: ##
1989: ## Get the number of results
1990: ##
1991: my $total_results = &Apache::lonmysql::number_of_rows($table);
1992: if (! defined($total_results)) {
1993: $r->print("A MySQL error has occurred.</form></body></html>");
1994: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1995: " of rows in table ".$table);
1996: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1997: return;
1998: }
1999: my $result;
2000: $result.=<<END;
2001: <html>
2002: <head>
2003: <script>
2004: function change_sort() {
2005: var newloc = "/adm/searchcat?phase=results";
2006: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
2007: newloc += "&sortby=";
2008: newloc += document.forms.statusform.elements.sortby.value;
2009: parent.resultsframe.location= newloc;
2010: }
2011: </script>
2012: <title>Results</title>
2013: </head>
2014: $bodytag
2015: <form name="statusform" action="" method="post">
2016: <input type="hidden" name="Queue" value="" />
2017: END
2018:
2019: #<h2>Sort Results</h2>
2020: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2021: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
2022: # foreach (keys(%SortableFields)) {
2023: # $result.="<option name=\"$_\"";
2024: # if ($_ eq $ENV{'form.sortby'}) {
2025: # $result.=" selected ";
2026: # }
2027: # $result.=" >$SortableFields{$_}</option>\n";
2028: # }
2029: # $result.="</select>\n";
2030: my $revise = &revise_button();
2031: $result.=<<END;
2032: <p>
2033: There are $total_results matches to your query. $revise
2034: </p><p>
2035: Search:$pretty_query_string
2036: </p>
2037: </form>
2038: </body>
2039: </html>
2040: END
2041: $r->print($result);
2042: return;
2043: }
2044:
2045: #####################################################################
2046: #####################################################################
2047:
2048: =pod
2049:
2050: =item MySQL Table Description
2051:
2052: MySQL table creation requires a precise description of the data to be
2053: stored. The use of the correct types to hold data is vital to efficient
2054: storage and quick retrieval of records. The columns must be described in
2055: the following format:
2056:
2057: =cut
2058:
2059: #####################################################################
2060: #####################################################################
2061: #
2062: # These should probably be scoped but I don't have time right now...
2063: #
2064: my @Datatypes;
2065: my @Fullindicies;
2066:
2067: ######################################################################
2068: ######################################################################
2069:
2070: =pod
2071:
2072: =item &create_results_table()
2073:
2074: Creates the table of search results by calling lonmysql. Stores the
2075: table id in $ENV{'form.table'}
2076:
2077: Inputs: none.
2078:
2079: Returns: the identifier of the table on success, undef on error.
2080:
2081: =cut
2082:
2083: ######################################################################
2084: ######################################################################
2085: sub set_up_table_structure {
2086: my ($datatypes,$fullindicies) =
2087: &LONCAPA::lonmetadata::describe_metadata_storage();
2088: # Copy the table description before modifying it...
2089: @Datatypes = @{$datatypes};
2090: unshift(@Datatypes,{name => 'id',
2091: type => 'MEDIUMINT',
2092: restrictions => 'UNSIGNED NOT NULL',
2093: primary_key => 'yes',
2094: auto_inc => 'yes' });
2095: @Fullindicies = @{$fullindicies};
2096: return;
2097: }
2098:
2099: sub create_results_table {
2100: &set_up_table_structure();
2101: my $table = &Apache::lonmysql::create_table
2102: ( { columns => \@Datatypes,
2103: FULLTEXT => [{'columns' => \@Fullindicies},],
2104: } );
2105: if (defined($table)) {
2106: $ENV{'form.table'} = $table;
2107: return $table;
2108: }
2109: return undef; # Error...
2110: }
2111:
2112: ######################################################################
2113: ######################################################################
2114:
2115: =pod
2116:
2117: =item Search Status update functions
2118:
2119: Each of the following functions changes the values of one of the
2120: input fields used to display the search status to the user. The names
2121: should be explanatory.
2122:
2123: Inputs: Apache request handler ($r), text to display.
2124:
2125: Returns: Nothing.
2126:
2127: =over 4
2128:
2129: =item &update_count_status()
2130:
2131: =item &update_status()
2132:
2133: =item &update_seconds()
2134:
2135: =back
2136:
2137: =cut
2138:
2139: ######################################################################
2140: ######################################################################
2141: sub update_count_status {
2142: my ($r,$text) = @_;
2143: $text =~ s/\'/\\\'/g;
2144: $r->print
2145: ("<script>document.statusform.count.value = ' $text'</script>\n");
2146: $r->rflush();
2147: }
2148:
2149: sub update_status {
2150: my ($r,$text) = @_;
2151: $text =~ s/\'/\\\'/g;
2152: $r->print
2153: ("<script>document.statusform.status.value = ' $text'</script>\n");
2154: $r->rflush();
2155: }
2156:
2157: {
2158: my $max_time = 40; # seconds for the search to complete
2159: my $start_time = 0;
2160: my $last_time = 0;
2161:
2162: sub reset_timing {
2163: $start_time = 0;
2164: $last_time = 0;
2165: }
2166:
2167: sub time_left {
2168: if ($start_time == 0) {
2169: $start_time = time;
2170: }
2171: my $time_left = $max_time - (time - $start_time);
2172: $time_left = 0 if ($time_left < 0);
2173: return $time_left;
2174: }
2175:
2176: sub update_seconds {
2177: my ($r) = @_;
2178: my $time = &time_left();
2179: if (($last_time-$time) > 0) {
2180: $r->print("<script>".
2181: "document.statusform.seconds.value = '$time'".
2182: "</script>\n");
2183: $r->rflush();
2184: }
2185: $last_time = $time;
2186: }
2187:
2188: }
2189:
2190: ######################################################################
2191: ######################################################################
2192:
2193: =pod
2194:
2195: =item &revise_button()
2196:
2197: Inputs: None
2198:
2199: Returns: html string for a 'revise search' button.
2200:
2201: =cut
2202:
2203: ######################################################################
2204: ######################################################################
2205: sub revise_button {
2206: my $revise_phase = 'disp_basic';
2207: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2208: my $newloc = '/adm/searchcat'.
2209: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2210: '&cleargroupsort=1'.
2211: '&phase='.$revise_phase;
2212: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2213: qq{ onClick="parent.location='$newloc';" /> };
2214: return $result;
2215: }
2216:
2217: ######################################################################
2218: ######################################################################
2219:
2220: =pod
2221:
2222: =item &run_search()
2223:
2224: Executes a search query by sending it the the other servers and putting the
2225: results into MySQL.
2226:
2227: =cut
2228:
2229: ######################################################################
2230: ######################################################################
2231: sub run_search {
2232: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2233: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2234: $bodytag.=&Apache::lonhtmlcommon::breadcrumbs
2235: (undef,'Searching','Searching',undef,undef,
2236: $ENV{'form.catalogmode'} ne 'groupsearch');
2237: my $connection = $r->connection;
2238: #
2239: # Print run_search header
2240: #
2241: $r->print(<<END);
2242: <html>
2243: <head><title>Search Status</title></head>
2244: $bodytag
2245: <form name="statusform" action="" method="post">
2246: <input type="hidden" name="Queue" value="" />
2247: END
2248: # Check to see if $pretty_string has more than one carriage return.
2249: # Assume \n s are following <br /> s and truncate the value.
2250: # (there is probably a better way)...
2251: my @Lines = split /<br \/>/,$pretty_string;
2252: if (@Lines > 2) {
2253: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
2254: }
2255: $r->print(&mt("Search: [_1]",$pretty_string));
2256: $r->rflush();
2257: #
2258: # Determine the servers we need to contact.
2259: my @Servers_to_contact;
2260: if (defined($serverlist)) {
2261: if (ref($serverlist) eq 'ARRAY') {
2262: @Servers_to_contact = @$serverlist;
2263: } else {
2264: @Servers_to_contact = ($serverlist);
2265: }
2266: } else {
2267: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2268: }
2269: my %Server_status;
2270: #
2271: # Check on the mysql table we will use to store results.
2272: my $table =$ENV{'form.table'};
2273: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2274: $r->print("Unable to determine table id to store search results in.".
2275: "The search has been aborted.</body></html>");
2276: return;
2277: }
2278: my $table_status = &Apache::lonmysql::check_table($table);
2279: if (! defined($table_status)) {
2280: $r->print("Unable to determine status of table.</body></html>");
2281: &Apache::lonnet::logthis("Bogus table id of $table for ".
2282: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2283: &Apache::lonnet::logthis("lonmysql error = ".
2284: &Apache::lonmysql::get_error());
2285: return;
2286: }
2287: if (! $table_status) {
2288: &Apache::lonnet::logthis("lonmysql error = ".
2289: &Apache::lonmysql::get_error());
2290: &Apache::lonnet::logthis("lonmysql debug = ".
2291: &Apache::lonmysql::get_debug());
2292: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2293: $r->print("The table id,$table, we tried to use is invalid.".
2294: "The search has been aborted.</body></html>");
2295: return;
2296: }
2297: ##
2298: ## Prepare for the big loop.
2299: my $hitcountsum;
2300: my $server;
2301: my $status;
2302: my $revise = &revise_button();
2303: $r->print(<<END);
2304: <table>
2305: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2306: <tr>
2307: <td><input type="text" name="status" value="" size="30" /></td>
2308: <td><input type="text" name="count" value="" size="10" /></td>
2309: <td><input type="text" name="seconds" value="" size="8" /></td>
2310: <td>$revise</td>
2311: </tr>
2312: </table>
2313: </form>
2314: END
2315: $r->rflush();
2316: &reset_timing();
2317: &update_seconds($r);
2318: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2319: while (&time_left() &&
2320: ((@Servers_to_contact) || keys(%Server_status))) {
2321: &update_seconds($r);
2322: #
2323: # Send out a search request
2324: if (@Servers_to_contact) {
2325: # Contact one server
2326: my $server = shift(@Servers_to_contact);
2327: &update_status($r,&mt('contacting [_1]',$server));
2328: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2329: $customshow,[$server]);
2330: ($server) = keys(%$reply);
2331: $Server_status{$server} = $reply->{$server};
2332: } else {
2333: # wait a sec. to give time for files to be written
2334: # This sleep statement is here instead of outside the else
2335: # block because we do not want to pause if we have servers
2336: # left to contact.
2337: if (scalar (keys(%Server_status))) {
2338: &update_status($r,
2339: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2340: }
2341: sleep(1);
2342: }
2343: #
2344: # Loop through the servers we have contacted but do not
2345: # have results from yet, looking for results.
2346: foreach my $server (keys(%Server_status)) {
2347: last if ($connection->aborted());
2348: &update_seconds($r);
2349: my $status = $Server_status{$server};
2350: if ($status eq 'con_lost') {
2351: delete ($Server_status{$server});
2352: next;
2353: }
2354: $status=~/^([\.\w]+)$/;
2355: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2356: if (-e $datafile && ! -e "$datafile.end") {
2357: &update_status($r,&mt('Receiving results from [_1]',$server));
2358: next;
2359: }
2360: last if ($connection->aborted());
2361: if (-e "$datafile.end") {
2362: &update_status($r,&mt('Reading results from [_1]',$server));
2363: if (-z "$datafile") {
2364: delete($Server_status{$server});
2365: next;
2366: }
2367: my $fh;
2368: if (!($fh=Apache::File->new($datafile))) {
2369: $r->print("Unable to open search results file for ".
2370: "server $server. Omitting from search");
2371: delete($Server_status{$server});
2372: next;
2373: }
2374: # Read in the whole file.
2375: while (my $result = <$fh>) {
2376: last if ($connection->aborted());
2377: #
2378: # Records are stored one per line
2379: chomp($result);
2380: next if (! $result);
2381: #
2382: # Parse the result.
2383: my %Fields = &parse_raw_result($result,$server);
2384: $Fields{'hostname'} = $server;
2385: #
2386: # Skip based on copyright
2387: next if (! ©right_check(\%Fields));
2388: #
2389: # Store the result in the mysql database
2390: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2391: if (! defined($result)) {
2392: $r->print(&Apache::lonmysql::get_error());
2393: }
2394: #
2395: $hitcountsum ++;
2396: &update_seconds($r);
2397: if ($hitcountsum % 50 == 0) {
2398: &update_count_status($r,$hitcountsum);
2399: }
2400: }
2401: $fh->close();
2402: # $server is only deleted if the results file has been
2403: # found and (successfully) opened. This may be a bad idea.
2404: delete($Server_status{$server});
2405: }
2406: last if ($connection->aborted());
2407: &update_count_status($r,$hitcountsum);
2408: }
2409: last if ($connection->aborted());
2410: &update_seconds($r);
2411: }
2412: &update_status($r,&mt('Search Complete [_1]',$server));
2413: &update_seconds($r);
2414: #
2415: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2416: #
2417: # We have run out of time or run out of servers to talk to and
2418: # results to get, so let the client know the top frame needs to be
2419: # loaded from /adm/searchcat
2420: $r->print("</body></html>");
2421: # if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2422: $r->print("<script>".
2423: "window.location='/adm/searchcat?".
2424: "phase=sort&".
2425: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2426: "</script>");
2427: # }
2428: return;
2429: }
2430:
2431: ######################################################################
2432: ######################################################################
2433:
2434: =pod
2435:
2436: =item &prev_next_buttons()
2437:
2438: Returns html for the previous and next buttons on the search results page.
2439:
2440: =cut
2441:
2442: ######################################################################
2443: ######################################################################
2444: sub prev_next_buttons {
2445: my ($current_min,$show,$total,$parms) = @_;
2446: return '' if ($show eq 'all'); # No links if you get them all at once.
2447: #
2448: # Create buttons
2449: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2450: $buttons .= '/>';
2451: $buttons .= ' 'x3;
2452: $buttons .= '<input type="submit" name="reload" '.
2453: 'value="'.&mt('Reload').'" />';
2454: $buttons .= ' 'x3;
2455: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2456: $buttons .= '/>';
2457: return $buttons;
2458: }
2459:
2460: ######################################################################
2461: ######################################################################
2462:
2463: =pod
2464:
2465: =item &display_results()
2466:
2467: Prints the results out for selection and perusal.
2468:
2469: =cut
2470:
2471: ######################################################################
2472: ######################################################################
2473: sub display_results {
2474: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2475: my $connection = $r->connection;
2476: $r->print(&search_results_header($importbutton,$closebutton));
2477: ##
2478: ## Set viewing function
2479: ##
2480: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2481: if (!defined($viewfunction)) {
2482: $r->print("Internal Error - Bad view selected.\n");
2483: $r->rflush();
2484: return;
2485: }
2486: ##
2487: ## $checkbox_num is a count of the number of checkboxes output on the
2488: ## page this is used only during catalogmode=groupsearch.
2489: my $checkbox_num = 0;
2490: ##
2491: ## Get the catalog controls setup
2492: ##
2493: my $action = "/adm/searchcat?phase=results";
2494: ##
2495: ## Deal with groupsearch by opening the groupsearch db file.
2496: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2497: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2498: &GDBM_WRCREAT(),0640)) {
2499: $r->print('Unable to store import results.</form></body></html>');
2500: $r->rflush();
2501: return;
2502: }
2503: }
2504: ##
2505: ## Prepare the table for querying
2506: my $table = $ENV{'form.table'};
2507: return if (! &ensure_db_and_table($r,$table));
2508: ##
2509: ## Get the number of results
2510: my $total_results = &Apache::lonmysql::number_of_rows($table);
2511: if (! defined($total_results)) {
2512: $r->print("A MySQL error has occurred.</form></body></html>");
2513: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2514: " of rows in table ".$table);
2515: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2516: return;
2517: }
2518: ##
2519: ## Determine how many results we need to get
2520: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2521: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
2522: if (exists($ENV{'form.prev'})) {
2523: $ENV{'form.start'} -= $ENV{'form.show'};
2524: } elsif (exists($ENV{'form.next'})) {
2525: $ENV{'form.start'} += $ENV{'form.show'};
2526: }
2527: $ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
2528: $ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
2529: my $min = $ENV{'form.start'};
2530: my $max;
2531: if ($ENV{'form.show'} eq 'all') {
2532: $max = $total_results ;
2533: } else {
2534: $max = $min + $ENV{'form.show'} - 1;
2535: $max = $total_results if ($max > $total_results);
2536: }
2537: ##
2538: ## Output form elements
2539: $r->print(&hidden_field('table').
2540: &hidden_field('phase').
2541: &hidden_field('persistent_db_id').
2542: &hidden_field('start')
2543: );
2544: ##
2545: ## Output links (if necessary) for 'prev' and 'next' pages.
2546: $r->print
2547: ('<table width="100%"><tr><td width="50%" align="right">'.
2548: &prev_next_buttons($min,$ENV{'form.show'},$total_results).
2549: '</td><td align="right">'.
2550: &viewoptions().'</td></tr></table>'
2551: );
2552: if ($total_results == 0) {
2553: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2554: '<h3>'.&mt('There are currently no results').'.</h3>'.
2555: "</form></body></html>");
2556: return;
2557: } else {
2558: $r->print
2559: ("<center>Results $min to $max out of $total_results</center>\n");
2560: }
2561: ##
2562: ## Get results from MySQL table
2563: my @Results = &Apache::lonmysql::get_rows($table,
2564: 'id>='.$min.' AND id<='.$max);
2565: ##
2566: ## Loop through the results and output them.
2567: foreach my $row (@Results) {
2568: if ($connection->aborted()) {
2569: &cleanup();
2570: return;
2571: }
2572: my %Fields = %{&parse_row(@$row)};
2573: my $output="<p>\n";
2574: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2575: $Fields{'title'} = 'Untitled';
2576: }
2577: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2578: $Fields{'id'},$checkbox_num++);
2579: # Render the result into html
2580: $output.= &$viewfunction($prefix,%Fields);
2581: # Print them out as they come in.
2582: $r->print($output);
2583: $r->rflush();
2584: }
2585: if (@Results < 1) {
2586: $r->print(&mt("There were no results matching your query"));
2587: } else {
2588: $r->print
2589: ('<center>'.
2590: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2591: "table=".$ENV{'form.table'}.
2592: "&phase=results".
2593: "&persistent_db_id=".
2594: $ENV{'form.persistent_db_id'})
2595: ."</center>\n"
2596: );
2597: }
2598: $r->print("</form></body></html>");
2599: $r->rflush();
2600: untie %groupsearch_db if (tied(%groupsearch_db));
2601: return;
2602: }
2603:
2604: ######################################################################
2605: ######################################################################
2606:
2607: =pod
2608:
2609: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2610:
2611: Returns html needed for the various catalog modes. Gets inputs from
2612: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2613:
2614: =cut
2615:
2616: ######################################################################
2617: ######################################################################
2618: sub catalogmode_output {
2619: my $output = '';
2620: my ($title,$url,$fnum,$checkbox_num) = @_;
2621: if ($ENV{'form.catalogmode'} eq 'interactive') {
2622: $title=~ s/\'/\\\'/g;
2623: if ($ENV{'form.catalogmode'} eq 'interactive') {
2624: $output.=<<END
2625: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2626: onClick="javascript:select_data('$title','$url')">
2627: </font>
2628: END
2629: }
2630: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2631: $groupsearch_db{"pre_${fnum}_link"}=$url;
2632: $groupsearch_db{"pre_${fnum}_title"}=$title;
2633: $output.=<<END;
2634: <font size='-1'>
2635: <input type="checkbox" name="returnvalues" value="SELECT"
2636: onClick="javascript:queue($checkbox_num,$fnum)" />
2637: </font>
2638: END
2639: }
2640: return $output;
2641: }
2642: ######################################################################
2643: ######################################################################
2644:
2645: =pod
2646:
2647: =item &parse_row()
2648:
2649: Parse a row returned from the database.
2650:
2651: =cut
2652:
2653: ######################################################################
2654: ######################################################################
2655: sub parse_row {
2656: my @Row = @_;
2657: my %Fields;
2658: if (! scalar(@Datatypes)) {
2659: &set_up_table_structure();
2660: }
2661: for (my $i=0;$i<=$#Row;$i++) {
2662: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2663: }
2664: $Fields{'language'} =
2665: &Apache::loncommon::languagedescription($Fields{'language'});
2666: $Fields{'copyrighttag'} =
2667: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2668: $Fields{'mimetag'} =
2669: &Apache::loncommon::filedescription($Fields{'mime'});
2670: return \%Fields;
2671: }
2672:
2673: ###########################################################
2674: ###########################################################
2675:
2676: =pod
2677:
2678: =item &parse_raw_result()
2679:
2680: Takes a line from the file of results and parse it. Returns a hash
2681: with keys according to column labels
2682:
2683: In addition, the following tags are set by calling the appropriate
2684: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2685:
2686: The 'title' field is set to "Untitled" if the title field is blank.
2687:
2688: 'abstract' and 'keywords' are truncated to 200 characters.
2689:
2690: =cut
2691:
2692: ###########################################################
2693: ###########################################################
2694: sub parse_raw_result {
2695: my ($result,$hostname) = @_;
2696: # conclude from self to others regarding fields
2697: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2698: (map {
2699: &Apache::lonnet::unescape($_);
2700: } (split(/\,/,$result)) );
2701: return %Fields;
2702: }
2703:
2704: ###########################################################
2705: ###########################################################
2706:
2707: =pod
2708:
2709: =item &handle_custom_fields()
2710:
2711: =cut
2712:
2713: ###########################################################
2714: ###########################################################
2715: sub handle_custom_fields {
2716: my @results = @{shift()};
2717: my $customshow='';
2718: my $extrashow='';
2719: my @customfields;
2720: if ($ENV{'form.customshow'}) {
2721: $customshow=$ENV{'form.customshow'};
2722: $customshow=~s/[^\w\s]//g;
2723: my @fields=map {
2724: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2725: } split(/\s+/,$customshow);
2726: @customfields=split(/\s+/,$customshow);
2727: if ($customshow) {
2728: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2729: }
2730: }
2731: my $customdata='';
2732: my %customhash;
2733: foreach my $result (@results) {
2734: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2735: my $tmp=$result;
2736: $tmp=~s/^custom\=//;
2737: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2738: } split(/\,/,$tmp);
2739: $customhash{$k}=$v;
2740: }
2741: }
2742: return ($extrashow,\@customfields,\%customhash);
2743: }
2744:
2745: ######################################################################
2746: ######################################################################
2747:
2748: =pod
2749:
2750: =item &search_results_header()
2751:
2752: Output the proper html headers and javascript code to deal with different
2753: calling modes.
2754:
2755: Takes most inputs directly from %ENV, except $mode.
2756:
2757: =over 4
2758:
2759: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2760:
2761: =back
2762:
2763: The following environment variables are checked:
2764:
2765: =over 4
2766:
2767: =item 'form.catalogmode'
2768:
2769: Checked for 'interactive' and 'groupsearch'.
2770:
2771: =item 'form.mode'
2772:
2773: Checked for existance & 'edit' mode.
2774:
2775: =item 'form.form'
2776:
2777: Contains the name of the form that has the input fields to set
2778:
2779: =item 'form.element'
2780:
2781: the name of the input field to put the URL into
2782:
2783: =item 'form.titleelement'
2784:
2785: the name of the input field to put the title into
2786:
2787: =back
2788:
2789: =cut
2790:
2791: ######################################################################
2792: ######################################################################
2793: sub search_results_header {
2794: my ($importbutton,$closebutton) = @_;
2795: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2796: my $result = '';
2797: # output beginning of search page
2798: # conditional output of script functions dependent on the mode in
2799: # which the search was invoked
2800: if ($ENV{'form.catalogmode'} eq 'interactive'){
2801: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2802: $result.=<<SCRIPT;
2803: <script type="text/javascript">
2804: function select_data(title,url) {
2805: changeTitle(title);
2806: changeURL(url);
2807: parent.close();
2808: }
2809: function changeTitle(val) {
2810: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2811: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2812: }
2813: }
2814: function changeURL(val) {
2815: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2816: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2817: }
2818: }
2819: </script>
2820: SCRIPT
2821: } elsif ($ENV{'form.mode'} eq 'edit') {
2822: my $form = $ENV{'form.form'};
2823: my $element = $ENV{'form.element'};
2824: my $titleelement = $ENV{'form.titleelement'};
2825: my $changetitle;
2826: if (!$titleelement) {
2827: $changetitle='function changeTitle(val) {}';
2828: } else {
2829: $changetitle=<<END;
2830: function changeTitle(val) {
2831: if (parent.targetwin.document) {
2832: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2833: } else {
2834: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2835: alert("Unable to transfer data to "+url);
2836: }
2837: }
2838: END
2839: }
2840:
2841: $result.=<<SCRIPT;
2842: <script type="text/javascript">
2843: function select_data(title,url) {
2844: changeURL(url);
2845: changeTitle(title);
2846: parent.close();
2847: }
2848: $changetitle
2849: function changeURL(val) {
2850: if (parent.targetwin.document) {
2851: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2852: } else {
2853: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2854: alert("Unable to transfer data to "+url);
2855: }
2856: }
2857: </script>
2858: SCRIPT
2859: }
2860: }
2861: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2862: <script type="text/javascript">
2863: function queue(checkbox_num,val) {
2864: if (document.forms.results.returnvalues.length != "undefined" &&
2865: typeof(document.forms.results.returnvalues.length) == "number") {
2866: if (document.forms.results.returnvalues[checkbox_num].checked) {
2867: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2868: } else {
2869: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2870: }
2871: } else {
2872: if (document.forms.results.returnvalues.checked) {
2873: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2874: } else {
2875: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2876: }
2877: }
2878: }
2879: function select_group() {
2880: parent.window.location=
2881: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2882: parent.statusframe.document.forms.statusform.elements.Queue.value;
2883: }
2884: </script>
2885: SCRIPT
2886: $result.=<<END;
2887: </head>
2888: $bodytag
2889: <form name="results" method="post" action="/adm/searchcat" >
2890: <input type="hidden" name="Queue" value="" />
2891: $importbutton
2892: END
2893: return $result;
2894: }
2895:
2896: ######################################################################
2897: ######################################################################
2898: sub search_status_header {
2899: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2900: return <<ENDSTATUS;
2901: <html><head><title>Search Status</title></head>
2902: $bodytag
2903: <h3>Search Status</h3>
2904: Sending search request to LON-CAPA servers.<br />
2905: ENDSTATUS
2906: }
2907:
2908: sub results_link {
2909: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2910: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2911: my $results_link = $basic_link."&phase=results".
2912: "&pause=1"."&start=1";
2913: return $results_link;
2914: }
2915:
2916: ######################################################################
2917: ######################################################################
2918: sub print_frames_interface {
2919: my $r = shift;
2920: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2921: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2922: my $run_search_link = $basic_link."&phase=run_search";
2923: my $results_link = &results_link();
2924: my $result = <<"ENDFRAMES";
2925: <html>
2926: <head>
2927: <script>
2928: var targetwin = opener;
2929: var queue = '';
2930: </script>
2931: <title>LON-CAPA Digital Library Search Results</title>
2932: </head>
2933: <frameset rows="150,*">
2934: <frame name="statusframe" src="$run_search_link">
2935: <frame name="resultsframe" src="$results_link">
2936: </frameset>
2937: </html>
2938: ENDFRAMES
2939:
2940: $r->print($result);
2941: return;
2942: }
2943:
2944: ######################################################################
2945: ######################################################################
2946:
2947: sub has_stat_data {
2948: my ($values) = @_;
2949: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2950: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2951: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2952: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2953: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2954: return 1;
2955: }
2956: return 0;
2957: }
2958:
2959: sub statfields {
2960: return ('count','stdno','disc','avetries','difficulty');
2961: }
2962:
2963: sub has_eval_data {
2964: my ($values) = @_;
2965: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2966: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2967: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2968: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2969: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
2970: return 1;
2971: }
2972: return 0;
2973: }
2974:
2975: sub evalfields {
2976: return ('clear','technical','correct','helpful','depth');
2977: }
2978:
2979: ######################################################################
2980: ######################################################################
2981:
2982: =pod
2983:
2984: =item Metadata Viewing Functions
2985:
2986: Output is a HTML-ified string.
2987:
2988: Input arguments are title, author, subject, url, keywords, version,
2989: notes, short abstract, mime, language, creation date,
2990: last revision date, owner, copyright, hostname, and
2991: extra custom metadata to show.
2992:
2993: =over 4
2994:
2995: =item &detailed_citation_view()
2996:
2997: =cut
2998:
2999: ######################################################################
3000: ######################################################################
3001: sub detailed_citation_view {
3002: my ($prefix,%values) = @_;
3003: my $result;
3004: $result .= '<b>'.$prefix.
3005: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
3006: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
3007: 'target="search_preview">'.$values{'title'}."</a></b>\n";
3008: $result .= "<p>\n";
3009: $result .= '<b>'.$values{'author'}.'</b>,'.
3010: ' <i>'.$values{'owner'}.'</i><br />';
3011: foreach my $field
3012: (
3013: { name=>'url',
3014: translate => '<b>URL:</b> [_1]',
3015: special => 'url link',},
3016: { name=>'subject',
3017: translate => '<b>Subject:</b> [_1]',},
3018: { name=>'keywords',
3019: translate => '<b>Keywords:</b> [_1]',},
3020: { name=>'notes',
3021: translate => '<b>Notes:</b> [_1]',},
3022: { name=>'mimetag',
3023: translate => '<b>MIME Type:</b> [_1]',},
3024: { name=>'standards',
3025: translate => '<b>Standards:</b>[_1]',},
3026: { name=>'copyrighttag',
3027: translate => '<b>Copyright/Distribution:</b> [_1]',},
3028: { name=>'count',
3029: format => "%d",
3030: translate => '<b>Access Count:</b> [_1]',},
3031: { name=>'stdno',
3032: format => "%d",
3033: translate => '<b>Number of Students:</b> [_1]',},
3034: { name=>'avetries',
3035: format => "%.2f",
3036: translate => '<b>Average Tries:</b> [_1]',},
3037: { name=>'disc',
3038: format => "%.2f",
3039: translate => '<b>Degree of Discrimination:</b> [_1]',},
3040: { name=>'difficulty',
3041: format => "%.2f",
3042: translate => '<b>Degree of Difficulty:</b> [_1]',},
3043: { name=>'clear',
3044: format => "%.2f",
3045: translate => '<b>Clear:</b> [_1]',},
3046: { name=>'depth',
3047: format => "%.2f",
3048: translate => '<b>Depth:</b> [_1]',},
3049: { name=>'helpful',
3050: format => "%.2f",
3051: translate => '<b>Helpful:</b> [_1]',},
3052: { name=>'correct',
3053: format => "%.2f",
3054: translate => '<b>Correct:</b> [_1]',},
3055: { name=>'technical',
3056: format => "%.2f",
3057: translate => '<b>Technical:</b> [_1]',},
3058: { name=>'comefrom_list',
3059: type => 'list',
3060: translate => 'Resources that lead up to this resource in maps',},
3061: { name=>'goto_list',
3062: type => 'list',
3063: translate => 'Resources that follow this resource in maps',},
3064: { name=>'sequsage_list',
3065: type => 'list',
3066: translate => 'Resources using or importing resource',},
3067: ) {
3068: next if (! exists($values{$field->{'name'}}) ||
3069: $values{$field->{'name'}} eq '');
3070: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3071: $result .= '<b>'.&mt($field->{'translate'}).'</b><ul>';
3072: foreach my $item (split(',',$values{$field->{'name'}})){
3073: $result .= '<li>'.
3074: '<a target="search_preview" '.
3075: 'href="/res/'.$item.'">'.$item.'</a></li>';
3076: }
3077: $result .= '</ul>';
3078: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3079: $result.= &mt($field->{'translate'},
3080: sprintf($field->{'format'},
3081: $values{$field->{'name'}})).'<br />'."\n";
3082: } else {
3083: if ($field->{'special'} eq 'url link') {
3084: $result.=
3085: &mt($field->{'translate'},
3086: '<a href="'.$values{'url'}.'" '.
3087: 'target="search_preview">'.
3088: $values{$field->{'name'}}.
3089: '</a>');
3090: } else {
3091: $result.= &mt($field->{'translate'},
3092: $values{$field->{'name'}});
3093: }
3094: $result .= "<br />\n";
3095: }
3096: }
3097: $result .= "</p>";
3098: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3099: $result .= '<p>'.$values{'extrashow'}.'</p>';
3100: }
3101: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3102: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3103: }
3104: $result .= '<hr align="left" width="200" noshade />'."\n";
3105: return $result;
3106: }
3107:
3108: ######################################################################
3109: ######################################################################
3110:
3111: =pod
3112:
3113: =item &summary_view()
3114:
3115: =cut
3116: ######################################################################
3117: ######################################################################
3118: sub summary_view {
3119: my ($prefix,%values) = @_;
3120: my $icon=&Apache::loncommon::icon($values{'url'});
3121: my $result=<<END;
3122: $prefix<img src="$icon" />
3123: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3124: target='search_preview'>$values{'author'}</a><br />
3125: $values{'title'}<br />
3126: $values{'owner'} -- $values{'lastrevisiondate'}<br />
3127: $values{'copyrighttag'}<br />
3128: $values{'extrashow'}
3129: </p>
3130: <hr align='left' width='200' noshade />
3131: END
3132: return $result;
3133: }
3134:
3135: ######################################################################
3136: ######################################################################
3137:
3138: =pod
3139:
3140: =item &compact_view()
3141:
3142: =cut
3143:
3144: ######################################################################
3145: ######################################################################
3146: sub compact_view {
3147: my ($prefix,%values) = @_;
3148: my $result =
3149: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
3150: '"> <a href="'.$values{'url'}.'" target="search_preview">'.
3151: $values{'title'}.'</a>'.(' 'x2).
3152: '<b>'.$values{'author'}.'</b><br />';
3153: return $result;
3154: }
3155:
3156:
3157: ######################################################################
3158: ######################################################################
3159:
3160: =pod
3161:
3162: =item &fielded_format_view()
3163:
3164: =cut
3165:
3166: ######################################################################
3167: ######################################################################
3168: sub fielded_format_view {
3169: my ($prefix,%values) = @_;
3170: my $icon=&Apache::loncommon::icon($values{'url'});
3171: my %Translated = &Apache::lonmeta::fieldnames();
3172: my $result=<<END;
3173: $prefix <img src="$icon" />
3174: <dl>
3175: <dt>URL:</dt>
3176: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3177: target='search_preview'>$values{'url'}</a></dd>
3178: END
3179: foreach my $field ('title','author','subject','keywords','notes',
3180: 'mimetag','language','creationdate','lastrevisiondate',
3181: 'owner','copyrighttag','hostname','abstract') {
3182: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3183: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3184: }
3185: if (&has_stat_data(\%values)) {
3186: foreach my $field (&statfields()) {
3187: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3188: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3189: }
3190: }
3191: if (&has_eval_data(\%values)) {
3192: foreach my $field (&evalfields()) {
3193: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3194: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3195: }
3196: }
3197: $result .= "</dl>\n";
3198: $result .= $values{'extrashow'};
3199: $result .= '<hr align="left" width="200" noshade />'."\n";
3200: return $result;
3201: }
3202:
3203: ######################################################################
3204: ######################################################################
3205:
3206: =pod
3207:
3208: =item &xml_sgml_view()
3209:
3210: =back
3211:
3212: =cut
3213:
3214: ######################################################################
3215: ######################################################################
3216: sub xml_sgml_view {
3217: my ($prefix,%values) = @_;
3218: my $xml = '<LonCapaResource>'."\n";
3219: # The usual suspects
3220: foreach my $field ('url','title','author','subject','keywords','notes') {
3221: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3222: }
3223: #
3224: $xml .= "<mimeInfo>\n";
3225: foreach my $field ('mime','mimetag') {
3226: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3227: }
3228: $xml .= "</mimeInfo>\n";
3229: #
3230: $xml .= "<languageInfo>\n";
3231: foreach my $field ('language','languagetag') {
3232: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3233: }
3234: $xml .= "</languageInfo>\n";
3235: #
3236: foreach my $field ('creationdate','lastrevisiondate','owner') {
3237: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3238: }
3239: #
3240: $xml .= "<copyrightInfo>\n";
3241: foreach my $field ('copyright','copyrighttag') {
3242: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3243: }
3244: $xml .= "</copyrightInfo>\n";
3245: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3246: "\n";
3247: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3248: #
3249: if (&has_stat_data(\%values)){
3250: $xml .= "<problemstatistics>\n";
3251: foreach my $field (&statfields()) {
3252: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3253: }
3254: $xml .= "</problemstatistics>\n";
3255: }
3256: #
3257: if (&has_eval_data(\%values)) {
3258: $xml .= "<evaluation>\n";
3259: foreach my $field (&evalfields) {
3260: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3261: }
3262: $xml .= "</evaluation>\n";
3263: }
3264: #
3265: $xml .= "</LonCapaResource>\n";
3266: $xml = &HTML::Entities::encode($xml,'<>&');
3267: my $result=<<END;
3268: $prefix
3269: <pre>
3270: $xml
3271: </pre>
3272: $values{'extrashow'}
3273: <hr align='left' width='200' noshade />
3274: END
3275: return $result;
3276: }
3277:
3278: ######################################################################
3279: ######################################################################
3280:
3281: =pod
3282:
3283: =item &filled() see if field is filled.
3284:
3285: =cut
3286:
3287: ######################################################################
3288: ######################################################################
3289: sub filled {
3290: my ($field)=@_;
3291: if ($field=~/\S/ && $field ne 'any') {
3292: return 1;
3293: } else {
3294: return 0;
3295: }
3296: }
3297:
3298: ######################################################################
3299: ######################################################################
3300:
3301: =pod
3302:
3303: =item &output_unparsed_phrase_error()
3304:
3305: =cut
3306:
3307: ######################################################################
3308: ######################################################################
3309: sub output_unparsed_phrase_error {
3310: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3311: my $errorstring;
3312: if ($field eq 'basicexp') {
3313: $errorstring = &mt('Unable to understand the search phrase <i>[_1]</i>. Please modify your search.',$ENV{'form.basicexp'});
3314: } else {
3315: $errorstring = &mt('Unable to understand the search phrase <b>[_1]</b>:<i>[_2]</i>.',$field,$ENV{'form.'.$field});
3316: }
3317: my $bodytag = &Apache::loncommon::bodytag('Search');
3318: my $heading = &mt('Unparsed Field');
3319: my $revise = &mt('Revise search request');
3320: # make query information persistent to allow for subsequent revision
3321: $r->print(<<ENDPAGE);
3322: <html>
3323: <head>
3324: <title>The LearningOnline Network with CAPA</title>
3325: </head>
3326: $bodytag
3327: <form method="post" action="/adm/searchcat">
3328: $hidden_fields
3329: $closebutton
3330: <hr />
3331: <h2>$heading</h2>
3332: <p>
3333: $errorstring
3334: </p>
3335: <p>
3336: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3337: </p>
3338: </body>
3339: </html>
3340: ENDPAGE
3341: }
3342:
3343: ######################################################################
3344: ######################################################################
3345:
3346: =pod
3347:
3348: =item &output_blank_field_error()
3349:
3350: Output a complete page that indicates the user has not filled in enough
3351: information to do a search.
3352:
3353: Inputs: $r (Apache request handle), $closebutton, $parms.
3354:
3355: Returns: nothing
3356:
3357: $parms is extra information to include in the 'Revise search request' link.
3358:
3359: =cut
3360:
3361: ######################################################################
3362: ######################################################################
3363: sub output_blank_field_error {
3364: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3365: my $bodytag=&Apache::loncommon::bodytag('Search');
3366: my $errormsg = &mt('You did not fill in enough information for the search to be started. You need to fill in relevant fields on the search page in order for a query to be processed.');
3367: my $revise = &mt('Revise Search Request');
3368: my $heading = &mt('Unactionable Search Queary');
3369: $r->print(<<ENDPAGE);
3370: <html>
3371: <head>
3372: <title>The LearningOnline Network with CAPA</title>
3373: </head>
3374: $bodytag
3375: <form method="post" action="/adm/searchcat">
3376: $hidden_fields
3377: $closebutton
3378: <hr />
3379: <h2>$heading</h2>
3380: <p>
3381: $errormsg
3382: </p>
3383: <p>
3384: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3385: </p>
3386: </body>
3387: </html>
3388: ENDPAGE
3389: return;
3390: }
3391:
3392: ######################################################################
3393: ######################################################################
3394:
3395: =pod
3396:
3397: =item &output_date_error()
3398:
3399: Output a full html page with an error message.
3400:
3401: Inputs:
3402:
3403: $r, the request pointer.
3404: $message, the error message for the user.
3405: $closebutton, the specialized close button needed for groupsearch.
3406:
3407: =cut
3408:
3409: ######################################################################
3410: ######################################################################
3411: sub output_date_error {
3412: my ($r,$message,$closebutton,$hidden_fields)=@_;
3413: # make query information persistent to allow for subsequent revision
3414: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3415: $r->print(<<RESULTS);
3416: <html>
3417: <head>
3418: <title>The LearningOnline Network with CAPA</title>
3419: </head>
3420: $bodytag
3421: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3422: <h1>Search Catalog</h1>
3423: <form method="post" action="/adm/searchcat">
3424: $hidden_fields
3425: <input type='button' value='Revise search request'
3426: onClick='this.form.submit();' />
3427: $closebutton
3428: <hr />
3429: <h3>Error</h3>
3430: <p>
3431: $message
3432: </p>
3433: </body>
3434: </html>
3435: RESULTS
3436: }
3437:
3438: ######################################################################
3439: ######################################################################
3440:
3441: =pod
3442:
3443: =item &start_fresh_session()
3444:
3445: Cleans the global %groupsearch_db by removing all fields which begin with
3446: 'pre_' or 'store'.
3447:
3448: =cut
3449:
3450: ######################################################################
3451: ######################################################################
3452: sub start_fresh_session {
3453: delete $groupsearch_db{'mode_catalog'};
3454: foreach (keys %groupsearch_db) {
3455: if ($_ =~ /^pre_/) {
3456: delete $groupsearch_db{$_};
3457: }
3458: if ($_ =~ /^store/) {
3459: delete $groupsearch_db{$_};
3460: }
3461: }
3462: }
3463:
3464: 1;
3465:
3466: sub cleanup {
3467: if (tied(%groupsearch_db)) {
3468: unless (untie(%groupsearch_db)) {
3469: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3470: }
3471: }
3472: &untiehash();
3473: &Apache::lonmysql::disconnect_from_db();
3474: }
3475:
3476: __END__
3477:
3478: =pod
3479:
3480: =back
3481:
3482: =cut
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