1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.209 2004/04/19 16:53:27 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77:
78: ######################################################################
79: ######################################################################
80: ##
81: ## Global variables
82: ##
83: ######################################################################
84: ######################################################################
85: my %groupsearch_db; # Database hash used to save values for the
86: # groupsearch RAT interface.
87: my %persistent_db; # gdbm hash which holds data which is supposed to
88: # persist across calls to lonsearchcat.pm
89:
90: # The different view modes and associated functions
91:
92: my %Views = ("detailed" => \&detailed_citation_view,
93: "summary" => \&summary_view,
94: "fielded" => \&fielded_format_view,
95: "xml" => \&xml_sgml_view,
96: "compact" => \&compact_view);
97:
98: ######################################################################
99: ######################################################################
100: sub handler {
101: my $r = shift;
102: # &set_defaults();
103: #
104: # set form defaults
105: #
106: my $hidden_fields;# Hold all the hidden fields used to keep track
107: # of the search system state
108: my $importbutton; # button to take the selected results and go to group
109: # sorting
110: my $diropendb; # The full path to the (temporary) search database file.
111: # This is set and used in &handler() and is also used in
112: # &output_results().
113: my $bodytag; # LON-CAPA standard body tag, gotten from
114: # &Apache::lonnet::bodytag.
115: # No title, no table, just a <body> tag.
116:
117: my $loaderror=&Apache::lonnet::overloaderror($r);
118: if ($loaderror) { return $loaderror; }
119:
120: my $closebutton; # button that closes the search window
121: # This button is different for the RAT compared to
122: # normal invocation.
123: #
124: &Apache::loncommon::content_type($r,'text/html');
125: $r->send_http_header;
126: return OK if $r->header_only;
127: ##
128: ## Prevent caching of the search interface window. Hopefully this means
129: ## we will get the launch=1 passed in a little more.
130: &Apache::loncommon::no_cache($r);
131: ##
132: ## Pick up form fields passed in the links.
133: ##
134: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
135: ['catalogmode','launch','acts','mode','form','element','pause',
136: 'phase','persistent_db_id','table','start','show',
137: 'cleargroupsort','titleelement']);
138: ##
139: ## The following is a trick - we wait a few seconds if asked to so
140: ## the daemon running the search can get ahead of the daemon
141: ## printing the results. We only need (theoretically) to do
142: ## this once, so the pause indicator is deleted
143: ##
144: if (exists($ENV{'form.pause'})) {
145: sleep(1);
146: delete($ENV{'form.pause'});
147: }
148: ##
149: ## Initialize global variables
150: ##
151: my $domain = $r->dir_config('lonDefDomain');
152: $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
153: #
154: # set the name of the persistent database
155: # $ENV{'form.persistent_db_id'} can only have digits in it.
156: if (! exists($ENV{'form.persistent_db_id'}) ||
157: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
158: ($ENV{'form.launch'} eq '1')) {
159: $ENV{'form.persistent_db_id'} = time;
160: }
161: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
162: my $persistent_db_file = "/home/httpd/perl/tmp/".
163: &Apache::lonnet::escape($domain).
164: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
165: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
166: ##
167: &Apache::lonhtmlcommon::clear_breadcrumbs();
168: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
169: &Apache::lonhtmlcommon::add_breadcrumb
170: ({href=>'/adm/searchcat?'.
171: 'catalogmode='.$ENV{'form.catalogmode'}.
172: '&launch='.$ENV{'form.launch'}.
173: '&mode='.$ENV{'form.mode'},
174: text=>"Course and Catalog Search",
175: bug=>'Searching',});
176: } else {
177: &Apache::lonhtmlcommon::add_breadcrumb
178: ({href=>'/adm/searchcat?'.
179: 'catalogmode='.$ENV{'form.catalogmode'}.
180: '&launch='.$ENV{'form.launch'}.
181: '&mode='.$ENV{'form.mode'},
182: text=>"Catalog Search",
183: bug=>'Searching',});
184: }
185: #
186: if (! &get_persistent_form_data($persistent_db_file)) {
187: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
188: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
189: "from $persistent_db_file");
190: $r->print(<<END);
191: <html>
192: <head><title>LON-CAPA Search Error</title></head>
193: $bodytag
194: We were unable to retrieve data describing your search. This is a serious
195: error and has been logged. Please alert your LON-CAPA administrator.
196: </body>
197: </html>
198: END
199: return OK;
200: }
201: }
202: ##
203: ## Clear out old values from groupsearch database
204: ##
205: untie %groupsearch_db if (tied(%groupsearch_db));
206: if (($ENV{'form.cleargroupsort'} eq '1') ||
207: (($ENV{'form.launch'} eq '1') &&
208: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
209: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
210: &start_fresh_session();
211: untie %groupsearch_db;
212: delete($ENV{'form.cleargroupsort'});
213: } else {
214: # This is a stupid error to give to the user.
215: # It really tells them nothing.
216: $r->print('<html><head></head>'.$bodytag.
217: 'Unable to tie hash to db file</body></html>');
218: return OK;
219: }
220: }
221: ##
222: ## Configure hidden fields
223: ##
224: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
225: $ENV{'form.persistent_db_id'}.'" />'."\n";
226: if (exists($ENV{'form.catalogmode'})) {
227: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
228: $ENV{'form.catalogmode'}.'" />'."\n";
229: }
230: if (exists($ENV{'form.form'})) {
231: $hidden_fields .= '<input type="hidden" name="form" value="'.
232: $ENV{'form.form'}.'" />'."\n";
233: }
234: if (exists($ENV{'form.element'})) {
235: $hidden_fields .= '<input type="hidden" name="element" value="'.
236: $ENV{'form.element'}.'" />'."\n";
237: }
238: if (exists($ENV{'form.titleelement'})) {
239: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
240: $ENV{'form.titleelement'}.'" />'."\n";
241: }
242: if (exists($ENV{'form.mode'})) {
243: $hidden_fields .= '<input type="hidden" name="mode" value="'.
244: $ENV{'form.mode'}.'" />'."\n";
245: }
246: ##
247: ## Configure dynamic components of interface
248: ##
249: if ($ENV{'form.catalogmode'} eq 'interactive') {
250: $closebutton="<input type='button' name='close' value='CLOSE' ";
251: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
252: $closebutton .="onClick='parent.close()'";
253: } else {
254: $closebutton .="onClick='self.close()'";
255: }
256: $closebutton .=">\n";
257: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
258: $closebutton="<input type='button' name='close' value='CLOSE' ";
259: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
260: $closebutton .="onClick='parent.close()'";
261: } else {
262: $closebutton .="onClick='self.close()'";
263: }
264: $closebutton .= ">";
265: $importbutton=<<END;
266: <input type='button' name='import' value='IMPORT'
267: onClick='javascript:select_group()'>
268: END
269: } else {
270: $closebutton = '';
271: $importbutton = '';
272: }
273: ##
274: ## Sanity checks on form elements
275: ##
276: if (!defined($ENV{'form.viewselect'})) {
277: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
278: ($ENV{'form.catalogmode'} eq 'interactive')) {
279: $ENV{'form.viewselect'} ="Compact View";
280: } else {
281: $ENV{'form.viewselect'} ="Detailed Citation View";
282: }
283: }
284: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
285: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
286: #
287: $ENV{'form.searchmode'} = 'basic';
288: if ($ENV{'form.phase'} eq 'adv_search' ||
289: $ENV{'form.phase'} eq 'disp_adv') {
290: $ENV{'form.searchmode'} = 'advanced';
291: } elsif ($ENV{'form.phase'} eq 'course_search') {
292: $ENV{'form.searchmode'} = 'course_search';
293: }
294: #
295: if ($ENV{'form.searchmode'} eq 'advanced') {
296: &Apache::lonhtmlcommon::add_breadcrumb
297: ({href=>'/adm/searchcat?phase=disp_adv&'.
298: 'catalogmode='.$ENV{'form.catalogmode'}.
299: '&launch='.$ENV{'form.launch'}.
300: '&mode='.$ENV{'form.mode'},
301: text=>"Advanced Search",
302: bug=>'Searching',});
303: } elsif ($ENV{'form.searchmode'} eq 'course search') {
304: &Apache::lonhtmlcommon::add_breadcrumb
305: ({href=>'/adm/searchcat?phase=disp_adv&'.
306: 'catalogmode='.$ENV{'form.catalogmode'}.
307: '&launch='.$ENV{'form.launch'}.
308: '&mode='.$ENV{'form.mode'},
309: text=>"Course Search",
310: bug=>'Searching',});
311: }
312: ##
313: ## Switch on the phase
314: ##
315: if ($ENV{'form.phase'} eq 'disp_basic') {
316: &print_basic_search_form($r,$closebutton,$hidden_fields);
317: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
318: &print_advanced_search_form($r,$closebutton,$hidden_fields);
319: } elsif ($ENV{'form.phase'} eq 'results') {
320: &display_results($r,$importbutton,$closebutton,$diropendb);
321: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
322: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
323: &get_persistent_data($persistent_db_file,
324: ['query','customquery','customshow',
325: 'libraries','pretty_string']);
326: if ($ENV{'form.phase'} eq 'sort') {
327: &print_sort_form($r,$pretty_string);
328: } elsif ($ENV{'form.phase'} eq 'run_search') {
329: &run_search($r,$query,$customquery,$customshow,
330: $libraries,$pretty_string);
331: }
332: } elsif ($ENV{'form.phase'} eq 'course_search') {
333: &course_search($r);
334: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
335: ($ENV{'form.phase'} eq 'adv_search')) {
336: # Set up table
337: if (! defined(&create_results_table())) {
338: my $errorstring=&Apache::lonmysql::get_error();
339: $r->print(<<END);
340: <html><head><title>Search Error</title></head>
341: $bodytag
342: Unable to create table in which to store search results.
343: The search has been aborted.
344: <br />$errorstring
345: </body>
346: </html>
347: END
348: return OK;
349: }
350: delete($ENV{'form.launch'});
351: if (! &make_form_data_persistent($r,$persistent_db_file)) {
352: $r->print(<<END);
353: <html><head><title>Search Error</title></head>
354: $bodytag
355: Unable to properly store search information. The search has been aborted.
356: </body>
357: </html>
358: END
359: return OK;
360: }
361: #
362: # We are running a search
363: my ($query,$customquery,$customshow,$libraries) =
364: (undef,undef,undef,undef);
365: my $pretty_string;
366: if ($ENV{'form.phase'} eq 'basic_search') {
367: ($query,$pretty_string,$libraries) =
368: &parse_basic_search($r,$closebutton,$hidden_fields);
369: } else { # Advanced search
370: ($query,$customquery,$customshow,$libraries,$pretty_string)
371: = &parse_advanced_search($r,$closebutton,$hidden_fields);
372: return OK if (! defined($query));
373: }
374: &make_persistent({ query => $query,
375: customquery => $customquery,
376: customshow => $customshow,
377: libraries => $libraries,
378: pretty_string => $pretty_string },
379: $persistent_db_file);
380: ##
381: ## Print out the frames interface
382: ##
383: &print_frames_interface($r);
384: }
385: return OK;
386: }
387:
388: ######################################################################
389: ######################################################################
390: ##
391: ## Course Search
392: ##
393: ######################################################################
394: ######################################################################
395: { # Scope the course search to avoid global variables
396: #
397: # Variables For course search
398: my %alreadyseen;
399: my %hash;
400: my $totalfound;
401:
402: sub course_search {
403: my $r=shift;
404: my $bodytag=&Apache::loncommon::bodytag('Course Search').
405: &Apache::loncommon::help_open_bug('Searching');
406: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
407: my $search_string = $ENV{'form.courseexp'};
408: my @New_Words;
409: if ($ENV{'form.crsrelated'}) {
410: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
411: if (@New_Words) {
412: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
413: } else {
414: $pretty_search_string .= ' '.&mt('with no related words').".";
415: }
416: }
417: my $fulltext=$ENV{'form.crsfulltext'};
418: my @allwords=($search_string,@New_Words);
419: $totalfound=0;
420: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
421: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
422: $r->rflush();
423: # ======================================================= Go through the course
424: undef %alreadyseen;
425: %alreadyseen=();
426: my $c=$r->connection;
427: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
428: &GDBM_READER(),0640)) {
429: foreach (keys %hash) {
430: if ($c->aborted()) { last; }
431: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
432: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
433: @allwords);
434: }
435: }
436: untie(%hash);
437: }
438: unless ($totalfound) {
439: $r->print('<p>'.&mt('No resources found').'.</p>');
440: }
441: # =================================================== Done going through course
442: $r->print('</body></html>');
443: }
444:
445: # =============================== This pulls up a resource and its dependencies
446:
447: sub checkonthis {
448: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
449: $alreadyseen{$url}=1;
450: $r->rflush();
451: my $result=&Apache::lonnet::metadata($url,'title').' '.
452: &Apache::lonnet::metadata($url,'subject').' '.
453: &Apache::lonnet::metadata($url,'abstract').' '.
454: &Apache::lonnet::metadata($url,'keywords');
455: if (($url) && ($fulltext)) {
456: $result.=&Apache::lonnet::ssi_body($url);
457: }
458: $result=~s/\s+/ /gs;
459: my $applies=0;
460: foreach (@allwords) {
461: if ($_=~/\w/) {
462: if ($result=~/$_/si) {
463: $applies++;
464: }
465: }
466: }
467: # Does this resource apply?
468: if ($applies) {
469: $r->print('<br />');
470: for (my $i=0;$i<=$level*5;$i++) {
471: $r->print(' ');
472: }
473: $r->print('<a href="'.$url.'" target="cat">'.
474: ($title?$title:$url).'</a><br />');
475: $totalfound++;
476: } elsif ($fulltext) {
477: $r->print(' .');
478: }
479: $r->rflush();
480: # Check also the dependencies of this one
481: my $dependencies=
482: &Apache::lonnet::metadata($url,'dependencies');
483: foreach (split(/\,/,$dependencies)) {
484: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
485: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
486: }
487: }
488: }
489:
490: sub untiehash {
491: if (tied(%hash)) {
492: untie(%hash);
493: }
494: }
495:
496: } # End of course search scoping
497:
498: sub search_html_header {
499: my $Str = <<ENDHEADER;
500: <html>
501: <head>
502: <title>The LearningOnline Network with CAPA</title>
503: <script type="text/javascript">
504: function openhelp(val) {
505: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
506: 'scrollbars=1,width=600,height=300');
507: openhelpwin.focus();
508: }
509: </script>
510: </head>
511: ENDHEADER
512: return $Str;
513: }
514:
515: ######################################################################
516: ######################################################################
517:
518: =pod
519:
520: =item &print_basic_search_form()
521:
522: Prints the form for the basic search. Sorry the name is so cryptic.
523:
524: =cut
525:
526: ######################################################################
527: ######################################################################
528: sub print_basic_search_form {
529: my ($r,$closebutton,$hidden_fields) = @_;
530: my $bodytag=&Apache::loncommon::bodytag('Search').
531: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Finding_Resources',
532: undef,undef,! $ENV{'form.launch'});
533: my $scrout = &search_html_header().$bodytag;
534: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
535: my $Statement=&searchhelp();
536: $scrout.=(<<ENDDOCUMENT);
537: <form name="loncapa_search" method="post" action="/adm/searchcat">
538: <input type="hidden" name="phase" value="basic_search" />
539: $hidden_fields
540: <p>
541: $Statement.
542: </p>
543: <p>
544: <table>
545: <tr><td>
546: ENDDOCUMENT
547: $scrout.=' '.
548: &Apache::lonhtmlcommon::textbox('basicexp',
549: $ENV{'form.basicexp'},40).
550: ' ';
551: my $relatedcheckbox =
552: &Apache::lonhtmlcommon::checkbox('related',
553: $ENV{'form.related'});
554: my $domain = $r->dir_config('lonDefDomain');
555: my $domaincheckbox =
556: &Apache::lonhtmlcommon::checkbox('domains',
557: $ENV{'form.domains'});
558: my $srch=&mt('Search');
559: my $header=&mt('Advanced Search');
560: my $userelatedwords=&mt('use related words');
561: my $onlysearchdomain=&mt('only search domain');
562: my $view=&viewoptions();
563: $scrout.=<<END;
564: </td><td><a
565: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
566: >$header</a></td></tr>
567: <tr><td>$relatedcheckbox $userelatedwords</td>
568: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
569: </table>
570: </p>
571: $view
572: <p>
573: <input type="submit" name="basicsubmit" value='$srch' />
574: $closebutton
575: END
576: $scrout.=<<ENDDOCUMENT;
577: </p>
578: </form>
579: ENDDOCUMENT
580: }
581: if ($ENV{'request.course.id'}) {
582: my %lt=&Apache::lonlocal::texthash(
583: 'srch' => 'Search',
584: 'header' => 'Course Search',
585: 'note' => 'Enter terms or phrases, then press "Search" below',
586: 'use' => 'use related words',
587: 'full' =>'fulltext search (time consuming)'
588: );
589: $scrout.=(<<ENDCOURSESEARCH);
590: <hr />
591: <h1>$lt{'header'}</h1>
592: <form name="course_search" method="post" action="/adm/searchcat">
593: <input type="hidden" name="phase" value="course_search" />
594: $hidden_fields
595: <p>
596: $lt{'note'}.
597: </p>
598: <p>
599: <table>
600: <tr><td>
601: ENDCOURSESEARCH
602: $scrout.=' '.
603: &Apache::lonhtmlcommon::textbox('courseexp',
604: $ENV{'form.courseexp'},40);
605: my $crscheckbox =
606: &Apache::lonhtmlcommon::checkbox('crsfulltext',
607: $ENV{'form.crsfulltext'});
608: my $relcheckbox =
609: &Apache::lonhtmlcommon::checkbox('crsrelated',
610: $ENV{'form.crsrelated'});
611: $scrout.=(<<ENDENDCOURSE);
612: </td></tr>
613: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
614: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
615: </table><p>
616: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
617: </p>
618: ENDENDCOURSE
619: }
620: $scrout.=(<<ENDDOCUMENT);
621: </body>
622: </html>
623: ENDDOCUMENT
624: $r->print($scrout);
625: return;
626: }
627: ######################################################################
628: ######################################################################
629:
630: =pod
631:
632: =item &advanced_search_form()
633:
634: Prints the advanced search form.
635:
636: =cut
637:
638: ######################################################################
639: ######################################################################
640: sub print_advanced_search_form{
641: my ($r,$closebutton,$hidden_fields) = @_;
642: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
643: 'reset' => 'Reset',
644: 'help' => 'Help');
645: my $advanced_buttons = <<"END";
646: <p>
647: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
648: <input type="reset" name="reset" value='$lt{"reset"}' />
649: $closebutton
650: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
651: END
652: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
653: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
654: 'Finding_Resources',
655: undef,undef,
656: ! $ENV{'form.launch'});
657: my $searchhelp=&searchhelp();
658: my $scrout=&search_html_header();
659: $scrout .= <<"ENDHEADER";
660: $bodytag
661: <form method="post" action="/adm/searchcat" name="advsearch">
662: $advanced_buttons
663: ENDHEADER
664: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
665: '<input type="hidden" name="phase" value="adv_search" />';
666: my %fields=&Apache::lonmeta::fieldnames();
667: #
668: $scrout.= '<p>'.$searchhelp.'</p>'.
669: "<table>\n";
670: my %related_word_search =
671: ('title'=>1,
672: 'author'=>0,
673: 'owner'=>0,
674: 'authorspace'=>0,
675: 'modifyinguser'=>0,
676: 'keywords'=>1,
677: 'notes'=>1,
678: 'abstract'=>1,
679: 'standards'=>1,
680: 'mime'=>1,
681: );
682: #
683: foreach my $field ('title','author','owner','authorspace','modifyinguser',
684: 'keywords','notes','abstract','standards','mime') {
685: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
686: &Apache::lonmeta::prettyinput($field,
687: $ENV{'form.'.$field},
688: $field,
689: 'advsearch',
690: $related_word_search{$field},
691: '</td><td align="left">',
692: $ENV{'form.'.$field.'_related'},
693: 50);
694: if ($related_word_search{$field}) {
695: $scrout .= 'related words';
696: } else {
697: $scrout .= '</td><td> ';
698: }
699: $scrout .= '</td></tr>'.$/;
700: }
701: foreach my $field ('lowestgradelevel','highestgradelevel') {
702: $scrout.='<tr>'.
703: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
704: '<td colspan="2">'.
705: &Apache::lonmeta::prettyinput($field,
706: $ENV{'form.'.$field},
707: $field,
708: 'advsearch',
709: 0).
710: '</td></tr>'.$/;
711: }
712: $scrout.='<tr><td align="right">'.
713: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
714: &Apache::loncommon::filecategoryselect('category',
715: $ENV{'form.category'}).
716: '</td></tr>'.$/;
717: $scrout.='<tr><td align="right" valign="top">'.
718: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
719: &Apache::loncommon::domain_select('domains',
720: $ENV{'form.domains'},1).
721: '</td></tr>'.$/;
722: $scrout .= "</table>\n<br />\n<table>\n";
723: my %dates=&Apache::lonlocal::texthash
724: ('creationdatestart' => 'Creation Date After',
725: 'creationdateend' => 'Creation Date Before',
726: 'lastrevisiondatestart' => 'Last Revision Date After',
727: 'lastrevisiondateend' => 'Last Revision Date Before');
728: foreach my $field (sort keys %dates) {
729: $scrout.='<tr>'.
730: '<td align="right">'.&titlefield($dates{$field}).'</td><td>'.
731: &Apache::lonhtmlcommon::date_setter('advsearch',$field,0,'',1).
732: '</td></tr>'.$/;
733: }
734: $scrout.="</table>\n";
735: $scrout.=<<ENDDOCUMENT;
736: $advanced_buttons
737: </form>
738: </body>
739: </html>
740: ENDDOCUMENT
741: $r->print($scrout);
742: return;
743: }
744:
745: ######################################################################
746: ######################################################################
747:
748: =pod
749:
750: =item &titlefield()
751:
752: Inputs: title text
753:
754: Outputs: titletext with font wrapper
755:
756: =cut
757:
758: ######################################################################
759: ######################################################################
760: sub titlefield {
761: my $title=shift;
762: return $title;
763: }
764:
765: ######################################################################
766: ######################################################################
767:
768: =pod
769:
770: =item viewoptiontext()
771:
772: Inputs: codename for view option
773:
774: Outputs: displayed text
775:
776: =cut
777:
778: ######################################################################
779: ######################################################################
780: sub viewoptiontext {
781: my $code=shift;
782: my %desc=&Apache::lonlocal::texthash
783: ('detailed' => "Detailed Citation View",
784: 'xml' => 'XML/SGML',
785: 'compact' => 'Compact View',
786: 'fielded' => 'Fielded Format',
787: 'summary' => 'Summary View');
788: return $desc{$code};
789: }
790:
791: ######################################################################
792: ######################################################################
793:
794: =pod
795:
796: =item viewoptions()
797:
798: Inputs: none
799:
800: Outputs: text for box with view options
801:
802: =cut
803:
804: ######################################################################
805: ######################################################################
806: sub viewoptions {
807: my $scrout="\n".'<nobr>';
808: if (! defined($ENV{'form.viewselect'})) {
809: $ENV{'form.viewselect'}='detailed';
810: }
811: $scrout.=&Apache::lonmeta::selectbox('viewselect',
812: $ENV{'form.viewselect'},
813: \&viewoptiontext,
814: sort(keys(%Views)));
815: $scrout.= ' ';
816: $scrout.=&Apache::lonmeta::selectbox('show',
817: $ENV{'form.show'},
818: undef,
819: (10,20,50,100,1000,10000));
820: $scrout .= (' 'x2).&mt('Records per Page').'</nobr>'.$/;
821: return $scrout;
822: }
823:
824: ######################################################################
825: ######################################################################
826:
827: =pod
828:
829: =item searchhelp()
830:
831: Inputs: none
832:
833: Outputs: return little blurb on how to enter searches
834:
835: =cut
836:
837: ######################################################################
838: ######################################################################
839: sub searchhelp {
840: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
841: }
842:
843: ######################################################################
844: ######################################################################
845:
846: =pod
847:
848: =item &get_persistent_form_data()
849:
850: Inputs: filename of database
851:
852: Outputs: returns undef on database errors.
853:
854: This function is the reverse of &make_persistent() for form data.
855: Retrieve persistent data from %persistent_db. Retrieved items will have their
856: values unescaped. If a form value already exists in $ENV, it will not be
857: overwritten. Form values that are array references may have values appended
858: to them.
859:
860: =cut
861:
862: ######################################################################
863: ######################################################################
864: sub get_persistent_form_data {
865: my $filename = shift;
866: return 0 if (! -e $filename);
867: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
868: &GDBM_READER(),0640));
869: #
870: # These make sure we do not get array references printed out as 'values'.
871: my %arrays_allowed = ('form.domains'=>1);
872: #
873: # Loop through the keys, looking for 'form.'
874: foreach my $name (keys(%persistent_db)) {
875: next if ($name !~ /^form./);
876: # Kludgification begins!
877: if ($name eq 'form.domains' &&
878: $ENV{'form.searchmode'} eq 'basic' &&
879: $ENV{'form.phase'} ne 'disp_basic') {
880: next;
881: }
882: # End kludge (hopefully)
883: next if (exists($ENV{$name}));
884: my @values = map {
885: &Apache::lonnet::unescape($_);
886: } split(',',$persistent_db{$name});
887: next if (@values <1);
888: if ($arrays_allowed{$name}) {
889: $ENV{$name} = [@values];
890: } else {
891: $ENV{$name} = $values[0] if ($values[0]);
892: }
893: }
894: untie (%persistent_db);
895: return 1;
896: }
897:
898: ######################################################################
899: ######################################################################
900:
901: =pod
902:
903: =item &get_persistent_data()
904:
905: Inputs: filename of database, ref to array of values to recover.
906:
907: Outputs: array of values. Returns undef on error.
908:
909: This function is the reverse of &make_persistent();
910: Retrieve persistent data from %persistent_db. Retrieved items will have their
911: values unescaped. If the item contains commas (before unescaping), the
912: returned value will be an array pointer.
913:
914: =cut
915:
916: ######################################################################
917: ######################################################################
918: sub get_persistent_data {
919: my $filename = shift;
920: my @Vars = @{shift()};
921: my @Values; # Return array
922: return undef if (! -e $filename);
923: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
924: &GDBM_READER(),0640));
925: foreach my $name (@Vars) {
926: if (! exists($persistent_db{$name})) {
927: push @Values, undef;
928: next;
929: }
930: my @values = map {
931: &Apache::lonnet::unescape($_);
932: } split(',',$persistent_db{$name});
933: if (@values <= 1) {
934: push @Values,$values[0];
935: } else {
936: push @Values,\@values;
937: }
938: }
939: untie (%persistent_db);
940: return @Values;
941: }
942:
943: ######################################################################
944: ######################################################################
945:
946: =pod
947:
948: =item &make_persistent()
949:
950: Inputs: Hash of values to save, filename of persistent database.
951:
952: Store variables away to the %persistent_db.
953: Values will be escaped. Values that are array pointers will have their
954: elements escaped and concatenated in a comma separated string.
955:
956: =cut
957:
958: ######################################################################
959: ######################################################################
960: sub make_persistent {
961: my %save = %{shift()};
962: my $filename = shift;
963: return undef if (! tie(%persistent_db,'GDBM_File',
964: $filename,&GDBM_WRCREAT(),0640));
965: foreach my $name (keys(%save)) {
966: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
967: # We handle array references, but not recursively.
968: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
969: $persistent_db{$name} = $store;
970: }
971: untie(%persistent_db);
972: return 1;
973: }
974:
975: ######################################################################
976: ######################################################################
977:
978: =pod
979:
980: =item &make_form_data_persistent()
981:
982: Inputs: filename of persistent database.
983:
984: Store most form variables away to the %persistent_db.
985: Values will be escaped. Values that are array pointers will have their
986: elements escaped and concatenated in a comma separated string.
987:
988: =cut
989:
990: ######################################################################
991: ######################################################################
992: sub make_form_data_persistent {
993: my $r = shift;
994: my $filename = shift;
995: my %save;
996: foreach (keys(%ENV)) {
997: next if (!/^form/ || /submit/);
998: $save{$_} = $ENV{$_};
999: }
1000: return &make_persistent(\%save,$filename);
1001: }
1002:
1003: ######################################################################
1004: ######################################################################
1005:
1006: =pod
1007:
1008: =item &parse_advanced_search()
1009:
1010: Parse advanced search form and return the following:
1011:
1012: =over 4
1013:
1014: =item $query Scalar containing an SQL query.
1015:
1016: =item $customquery Scalar containing a custom query.
1017:
1018: =item $customshow Scalar containing commands to show custom metadata.
1019:
1020: =item $libraries_to_query Reference to array of domains to search.
1021:
1022: =back
1023:
1024: =cut
1025:
1026: ######################################################################
1027: ######################################################################
1028: sub parse_advanced_search {
1029: my ($r,$closebutton,$hidden_fields)=@_;
1030: my $fillflag=0;
1031: my $pretty_search_string = "<br />\n";
1032: # Clean up fields for safety
1033: for my $field ('title','author','subject','keywords','url','version',
1034: 'creationdatestart_month','creationdatestart_day',
1035: 'creationdatestart_year','creationdateend_month',
1036: 'creationdateend_day','creationdateend_year',
1037: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1038: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1039: 'lastrevisiondateend_day','lastrevisiondateend_year',
1040: 'notes','abstract','extension','language','owner',
1041: 'custommetadata','customshow','category') {
1042: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1043: }
1044: foreach ('mode','form','element') {
1045: # is this required? Hmmm.
1046: next unless (exists($ENV{"form.$_"}));
1047: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1048: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1049: }
1050: # Preprocess the category form element.
1051: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1052: ref($ENV{'form.category'}));
1053: #
1054: # Check to see if enough information was filled in
1055: for my $field ('title','author','subject','keywords','url','version',
1056: 'notes','abstract','category','extension','language',
1057: 'owner','custommetadata') {
1058: if (&filled($ENV{"form.$field"})) {
1059: $fillflag++;
1060: }
1061: }
1062: unless ($fillflag) {
1063: &output_blank_field_error($r,$closebutton,
1064: 'phase=disp_adv',$hidden_fields);
1065: return ;
1066: }
1067: # Turn the form input into a SQL-based query
1068: my $query='';
1069: my @queries;
1070: my $font = '<font color="#800000" face="helvetica">';
1071: # Evaluate logical expression AND/OR/NOT phrase fields.
1072: foreach my $field ('title','author','subject','notes','abstract','url',
1073: 'keywords','version','owner','standards') {
1074: if ($ENV{'form.'.$field}) {
1075: my $searchphrase = $ENV{'form.'.$field};
1076: $pretty_search_string .= $font."$field</font> contains <b>".
1077: $searchphrase."</b>";
1078: if ($ENV{'form.'.$field.'_related'}) {
1079: my @New_Words;
1080: ($searchphrase,@New_Words) = &related_version($searchphrase);
1081: if (@New_Words) {
1082: $pretty_search_string .= " with related words: ".
1083: "<b>@New_Words</b>.";
1084: } else {
1085: $pretty_search_string .= " with no related words.";
1086: }
1087: }
1088: $pretty_search_string .= "<br />\n";
1089: push @queries,&build_SQL_query($field,$searchphrase);
1090: }
1091: }
1092: #
1093: # Make the 'mime' from 'form.category' and 'form.extension'
1094: #
1095: my $searchphrase;
1096: if (exists($ENV{'form.category'}) &&
1097: $ENV{'form.category'} !~ /^\s*$/ &&
1098: $ENV{'form.category'} ne 'any') {
1099: my @extensions = &Apache::loncommon::filecategorytypes
1100: ($ENV{'form.category'});
1101: if (scalar(@extensions) > 0) {
1102: $searchphrase = join(' OR ',@extensions);
1103: }
1104: }
1105: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1106: $searchphrase .= ' OR ' if (defined($searchphrase));
1107: my @extensions = split(/,/,$ENV{'form.extension'});
1108: $searchphrase .= join(' OR ',@extensions);
1109: }
1110: if (defined($searchphrase)) {
1111: push @queries,&build_SQL_query('mime',$searchphrase);
1112: $pretty_search_string .=$font.'mime</font> contains <b>'.
1113: $searchphrase.'</b><br />';
1114: }
1115: #
1116: # Evaluate option lists
1117: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1118: push @queries,"(language like \"$ENV{'form.language'}\")";
1119: $pretty_search_string.=$font."language</font>= ".
1120: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1121: "<br />\n";
1122: }
1123: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1124: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1125: $pretty_search_string.=$font."copyright</font> = ".
1126: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1127: "<br \>\n";
1128: }
1129: #
1130: # Evaluate date windows
1131: my $datequery=&build_date_queries(
1132: $ENV{'form.creationdatestart_month'},
1133: $ENV{'form.creationdatestart_day'},
1134: $ENV{'form.creationdatestart_year'},
1135: $ENV{'form.creationdateend_month'},
1136: $ENV{'form.creationdateend_day'},
1137: $ENV{'form.creationdateend_year'},
1138: $ENV{'form.lastrevisiondatestart_month'},
1139: $ENV{'form.lastrevisiondatestart_day'},
1140: $ENV{'form.lastrevisiondatestart_year'},
1141: $ENV{'form.lastrevisiondateend_month'},
1142: $ENV{'form.lastrevisiondateend_day'},
1143: $ENV{'form.lastrevisiondateend_year'},
1144: );
1145: # Test to see if date windows are legitimate
1146: if ($datequery=~/^Incorrect/) {
1147: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1148: return ;
1149: } elsif ($datequery) {
1150: # Here is where you would set up pretty_search_string to output
1151: # date query information.
1152: push @queries,$datequery;
1153: }
1154: #
1155: # Process form information for custom metadata querying
1156: my $customquery=undef;
1157: ##
1158: ## The custom metadata search was removed q long time ago mostly
1159: ## because I was unable to figureout exactly how it worked and could
1160: ## not imagine people actually using it. MH
1161: ##
1162: # if ($ENV{'form.custommetadata'}) {
1163: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1164: # $ENV{'form.custommetadata'}."</b><br />\n";
1165: # $customquery=&build_custommetadata_query('custommetadata',
1166: # $ENV{'form.custommetadata'});
1167: # }
1168: my $customshow=undef;
1169: # if ($ENV{'form.customshow'}) {
1170: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1171: # $ENV{'form.customshow'}."</b><br />\n";
1172: # $customshow=$ENV{'form.customshow'};
1173: # $customshow=~s/[^\w\s]//g;
1174: # my @fields=split(/\s+/,$customshow);
1175: # $customshow=join(" ",@fields);
1176: # }
1177: ##
1178: ## Deal with restrictions to given domains
1179: ##
1180: my ($libraries_to_query,$pretty_domains_string) =
1181: &parse_domain_restrictions();
1182: $pretty_search_string .= $pretty_domains_string."<br />\n";
1183: #
1184: if (@queries) {
1185: $query=join(" AND ",@queries);
1186: $query="select * from metadata where $query";
1187: } elsif ($customquery) {
1188: $query = '';
1189: }
1190: return ($query,$customquery,$customshow,$libraries_to_query,
1191: $pretty_search_string);
1192: }
1193:
1194: sub parse_domain_restrictions {
1195: my $libraries_to_query = undef;
1196: # $ENV{'form.domains'} can be either a scalar or an array reference.
1197: # We need an array.
1198: if (! exists($ENV{'form.domains'})) {
1199: return (undef,'');
1200: }
1201: my @allowed_domains;
1202: if (ref($ENV{'form.domains'})) {
1203: @allowed_domains = @{$ENV{'form.domains'}};
1204: } else {
1205: @allowed_domains = ($ENV{'form.domains'});
1206: }
1207: #
1208: my %domain_hash = ();
1209: my $pretty_domains_string;
1210: foreach (@allowed_domains) {
1211: $domain_hash{$_}++;
1212: }
1213: if ($domain_hash{'any'}) {
1214: $pretty_domains_string = "In all LON-CAPA domains.";
1215: } else {
1216: if (@allowed_domains > 1) {
1217: $pretty_domains_string = "In LON-CAPA domains:";
1218: } else {
1219: $pretty_domains_string = "In LON-CAPA domain ";
1220: }
1221: foreach (sort @allowed_domains) {
1222: $pretty_domains_string .= "<b>".$_."</b> ";
1223: }
1224: foreach (keys(%Apache::lonnet::libserv)) {
1225: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1226: push @$libraries_to_query,$_;
1227: }
1228: }
1229: }
1230: return ($libraries_to_query,$pretty_domains_string);
1231: }
1232:
1233: ######################################################################
1234: ######################################################################
1235:
1236: =pod
1237:
1238: =item &parse_basic_search()
1239:
1240: Parse the basic search form and return a scalar containing an sql query.
1241:
1242: =cut
1243:
1244: ######################################################################
1245: ######################################################################
1246: sub parse_basic_search {
1247: my ($r,$closebutton)=@_;
1248: #
1249: # Clean up fields for safety
1250: for my $field ('basicexp') {
1251: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1252: }
1253: foreach ('mode','form','element') {
1254: # is this required? Hmmm.
1255: next unless (exists($ENV{"form.$_"}));
1256: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1257: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1258: }
1259: my ($libraries_to_query,$pretty_domains_string) =
1260: &parse_domain_restrictions();
1261: #
1262: # Check to see if enough of a query is filled in
1263: unless (&filled($ENV{'form.basicexp'})) {
1264: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1265: return OK;
1266: }
1267: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1268: my $search_string = $ENV{'form.basicexp'};
1269: if ($ENV{'form.related'}) {
1270: my @New_Words;
1271: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1272: if (@New_Words) {
1273: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1274: } else {
1275: $pretty_search_string .= " with no related words.";
1276: }
1277: }
1278: #
1279: # Build SQL query string based on form page
1280: my $query='';
1281: my $concatarg=join(',',
1282: ('title', 'author', 'subject', 'notes', 'abstract',
1283: 'keywords'));
1284: $concatarg='title' if $ENV{'form.titleonly'};
1285: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1286: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1287: $pretty_search_string .= ' '.$pretty_domains_string;
1288: }
1289: $pretty_search_string .= "<br />\n";
1290: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1291: # &Apache::lonnet::logthis($final_query);
1292: return ($final_query,$pretty_search_string,
1293: $libraries_to_query);
1294: }
1295:
1296: ######################################################################
1297: ######################################################################
1298:
1299: =pod
1300:
1301: =item &related_version()
1302:
1303: Modifies an input string to include related words. Words in the string
1304: are replaced with parenthesized lists of 'OR'd words. For example
1305: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1306:
1307: Note: Using this twice on a string is probably silly.
1308:
1309: =cut
1310:
1311: ######################################################################
1312: ######################################################################
1313: sub related_version {
1314: my $search_string = shift;
1315: my $result = $search_string;
1316: my %New_Words = ();
1317: while ($search_string =~ /(\w+)/cg) {
1318: my $word = $1;
1319: next if (lc($word) =~ /\b(or|and|not)\b/);
1320: my @Words = &Apache::loncommon::get_related_words($word);
1321: @Words = ($#Words>4? @Words[0..4] : @Words);
1322: foreach (@Words) { $New_Words{$_}++;}
1323: my $replacement = join " OR ", ($word,@Words);
1324: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1325: }
1326: return $result,sort(keys(%New_Words));
1327: }
1328:
1329: ######################################################################
1330: ######################################################################
1331:
1332: =pod
1333:
1334: =item &build_SQL_query()
1335:
1336: Builds a SQL query string from a logical expression with AND/OR keywords
1337: using Text::Query and &recursive_SQL_query_builder()
1338:
1339: =cut
1340:
1341: ######################################################################
1342: ######################################################################
1343: sub build_SQL_query {
1344: my ($field_name,$logic_statement)=@_;
1345: my $q=new Text::Query('abc',
1346: -parse => 'Text::Query::ParseAdvanced',
1347: -build => 'Text::Query::Build');
1348: $q->prepare($logic_statement);
1349: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1350: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1351: return $sql_query;
1352: }
1353:
1354: ######################################################################
1355: ######################################################################
1356:
1357: =pod
1358:
1359: =item &build_custommetadata_query()
1360:
1361: Constructs a custom metadata query using a rather heinous regular
1362: expression.
1363:
1364: =cut
1365:
1366: ######################################################################
1367: ######################################################################
1368: sub build_custommetadata_query {
1369: my ($field_name,$logic_statement)=@_;
1370: my $q=new Text::Query('abc',
1371: -parse => 'Text::Query::ParseAdvanced',
1372: -build => 'Text::Query::BuildAdvancedString');
1373: $q->prepare($logic_statement);
1374: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1375: # quick fix to change literal into xml tag-matching
1376: # will eventually have to write a separate builder module
1377: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1378: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1379: /\\<$1\\>?# \<wordone\>
1380: \[\^\\<\]?# [^\<]
1381: \*$2\[\^\\<\]?# *wordtwo[^\<]
1382: \*\\<\\\/$1\\>?# *\<\/wordone\>
1383: /g;
1384: return $matchexp;
1385: }
1386:
1387: ######################################################################
1388: ######################################################################
1389:
1390: =pod
1391:
1392: =item &recursive_SQL_query_build()
1393:
1394: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1395:
1396: =cut
1397:
1398: ######################################################################
1399: ######################################################################
1400: sub recursive_SQL_query_build {
1401: my ($dkey,$pattern)=@_;
1402: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1403: return $pattern unless @matches;
1404: foreach my $match (@matches) {
1405: $match=~/\[ (\w+)\s(.*) \]/;
1406: my ($key,$value)=($1,$2);
1407: my $replacement='';
1408: if ($key eq 'literal') {
1409: $replacement="($dkey LIKE \"\%$value\%\")";
1410: } elsif (lc($key) eq 'not') {
1411: $value=~s/LIKE/NOT LIKE/;
1412: # $replacement="($dkey not like $value)";
1413: $replacement="$value";
1414: } elsif ($key eq 'and') {
1415: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1416: $replacement="($1 AND $2)";
1417: } elsif ($key eq 'or') {
1418: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1419: $replacement="($1 OR $2)";
1420: }
1421: substr($pattern,
1422: index($pattern,$match),
1423: length($match),
1424: $replacement);
1425: }
1426: &recursive_SQL_query_build($dkey,$pattern);
1427: }
1428:
1429: ######################################################################
1430: ######################################################################
1431:
1432: =pod
1433:
1434: =item &build_date_queries()
1435:
1436: Builds a SQL logic query to check time/date entries.
1437: Also reports errors (check for /^Incorrect/).
1438:
1439: =cut
1440:
1441: ######################################################################
1442: ######################################################################
1443: sub build_date_queries {
1444: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1445: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1446: my @queries;
1447: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1448: unless ($cmonth1 and $cday1 and $cyear1 and
1449: $cmonth2 and $cday2 and $cyear2) {
1450: return "Incorrect entry for the creation date. You must specify ".
1451: "a starting month, day, and year and an ending month, ".
1452: "day, and year.";
1453: }
1454: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1455: $cnumeric1+=0;
1456: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1457: $cnumeric2+=0;
1458: if ($cnumeric1>$cnumeric2) {
1459: return "Incorrect entry for the creation date. The starting ".
1460: "date must occur before the ending date.";
1461: }
1462: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1463: "$cyear2-$cmonth2-$cday2 23:59:59')";
1464: push @queries,$cquery;
1465: }
1466: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1467: unless ($lmonth1 and $lday1 and $lyear1 and
1468: $lmonth2 and $lday2 and $lyear2) {
1469: return "Incorrect entry for the last revision date. You must ".
1470: "specify a starting month, day, and year and an ending ".
1471: "month, day, and year.";
1472: }
1473: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1474: $lnumeric1+=0;
1475: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1476: $lnumeric2+=0;
1477: if ($lnumeric1>$lnumeric2) {
1478: return "Incorrect entry for the last revision date. The ".
1479: "starting date must occur before the ending date.";
1480: }
1481: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1482: "$lyear2-$lmonth2-$lday2 23:59:59')";
1483: push @queries,$lquery;
1484: }
1485: if (@queries) {
1486: return join(" AND ",@queries);
1487: }
1488: return '';
1489: }
1490:
1491: ######################################################################
1492: ######################################################################
1493:
1494: =pod
1495:
1496: =item ©right_check()
1497:
1498: Inputs: $Metadata, a hash pointer of metadata for a resource.
1499:
1500: Returns: 1 if the resource is available to the user making the query,
1501: 0 otherwise.
1502:
1503: =cut
1504:
1505: ######################################################################
1506: ######################################################################
1507: sub copyright_check {
1508: my $Metadata = shift;
1509: # Check copyright tags and skip results the user cannot use
1510: my (undef,undef,$resdom,$resname) = split('/',
1511: $Metadata->{'url'});
1512: # Check for priv
1513: if (($Metadata->{'copyright'} eq 'priv') &&
1514: (($ENV{'user.name'} ne $resname) &&
1515: ($ENV{'user.domain'} ne $resdom))) {
1516: return 0;
1517: }
1518: # Check for domain
1519: if (($Metadata->{'copyright'} eq 'domain') &&
1520: ($ENV{'user.domain'} ne $resdom)) {
1521: return 0;
1522: }
1523: return 1;
1524: }
1525:
1526: ######################################################################
1527: ######################################################################
1528:
1529: =pod
1530:
1531: =item &ensure_db_and_table()
1532:
1533: Ensure we can get lonmysql to connect to the database and the table we
1534: need exists.
1535:
1536: Inputs: $r, table id
1537:
1538: Returns: undef on error, 1 if the table exists.
1539:
1540: =cut
1541:
1542: ######################################################################
1543: ######################################################################
1544: sub ensure_db_and_table {
1545: my ($r,$table) = @_;
1546: ##
1547: ## Sanity check the table id.
1548: ##
1549: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1550: $r->print("Unable to retrieve search results. ".
1551: "Unable to determine the table results were stored in. ".
1552: "</body></html>");
1553: return undef;
1554: }
1555: ##
1556: ## Make sure we can connect and the table exists.
1557: ##
1558: my $connection_result = &Apache::lonmysql::connect_to_db();
1559: if (!defined($connection_result)) {
1560: $r->print("Unable to connect to the MySQL database where your results".
1561: " are stored. </body></html>");
1562: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1563: " connect to database.");
1564: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1565: return undef;
1566: }
1567: my $table_check = &Apache::lonmysql::check_table($table);
1568: if (! defined($table_check)) {
1569: $r->print("A MySQL error has occurred.</form></body></html>");
1570: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1571: " of table ".$table);
1572: return undef;
1573: } elsif (! $table_check) {
1574: $r->print("The table of results could not be found.");
1575: &Apache::lonnet::logthis("The user requested a table, ".$table.
1576: ", that could not be found.");
1577: return undef;
1578: }
1579: return 1;
1580: }
1581:
1582: ######################################################################
1583: ######################################################################
1584:
1585: =pod
1586:
1587: =item &print_sort_form()
1588:
1589: The sort feature is not implemented at this time. This form just prints
1590: a link to change the search query.
1591:
1592: =cut
1593:
1594: ######################################################################
1595: ######################################################################
1596: sub print_sort_form {
1597: my ($r,$pretty_query_string) = @_;
1598: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1599: ##
1600: my %SortableFields=&Apache::lonlocal::texthash(
1601: id => 'Default',
1602: title => 'Title',
1603: author => 'Author',
1604: subject => 'Subject',
1605: url => 'URL',
1606: version => 'Version Number',
1607: mime => 'Mime type',
1608: lang => 'Language',
1609: owner => 'Owner/Publisher',
1610: copyright => 'Copyright',
1611: hostname => 'Host',
1612: creationdate => 'Creation Date',
1613: lastrevisiondate => 'Revision Date'
1614: );
1615: ##
1616: my $table = $ENV{'form.table'};
1617: return if (! &ensure_db_and_table($r,$table));
1618: ##
1619: ## Get the number of results
1620: ##
1621: my $total_results = &Apache::lonmysql::number_of_rows($table);
1622: if (! defined($total_results)) {
1623: $r->print("A MySQL error has occurred.</form></body></html>");
1624: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1625: " of rows in table ".$table);
1626: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1627: return;
1628: }
1629: my $result;
1630: $result.=<<END;
1631: <html>
1632: <head>
1633: <script>
1634: function change_sort() {
1635: var newloc = "/adm/searchcat?phase=results";
1636: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1637: newloc += "&sortby=";
1638: newloc += document.forms.statusform.elements.sortby.value;
1639: parent.resultsframe.location= newloc;
1640: }
1641: </script>
1642: <title>Results</title>
1643: </head>
1644: $bodytag
1645: <form name="statusform" action="" method="post">
1646: <input type="hidden" name="Queue" value="" />
1647: END
1648:
1649: #<h2>Sort Results</h2>
1650: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1651: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1652: # foreach (keys(%SortableFields)) {
1653: # $result.="<option name=\"$_\"";
1654: # if ($_ eq $ENV{'form.sortby'}) {
1655: # $result.=" selected ";
1656: # }
1657: # $result.=" >$SortableFields{$_}</option>\n";
1658: # }
1659: # $result.="</select>\n";
1660: my $revise = &revise_button();
1661: $result.=<<END;
1662: <p>
1663: There are $total_results matches to your query. $revise
1664: </p><p>
1665: Search:$pretty_query_string
1666: </p>
1667: </form>
1668: </body>
1669: </html>
1670: END
1671: $r->print($result);
1672: return;
1673: }
1674:
1675: #####################################################################
1676: #####################################################################
1677:
1678: =pod
1679:
1680: =item MySQL Table Description
1681:
1682: MySQL table creation requires a precise description of the data to be
1683: stored. The use of the correct types to hold data is vital to efficient
1684: storage and quick retrieval of records. The columns must be described in
1685: the following format:
1686:
1687: =cut
1688:
1689: #####################################################################
1690: #####################################################################
1691: #
1692: # These should probably be scoped but I don't have time right now...
1693: #
1694: my @Datatypes;
1695: my @Fullindicies;
1696:
1697: ######################################################################
1698: ######################################################################
1699:
1700: =pod
1701:
1702: =item &create_results_table()
1703:
1704: Creates the table of search results by calling lonmysql. Stores the
1705: table id in $ENV{'form.table'}
1706:
1707: Inputs: none.
1708:
1709: Returns: the identifier of the table on success, undef on error.
1710:
1711: =cut
1712:
1713: ######################################################################
1714: ######################################################################
1715: sub set_up_table_structure {
1716: my ($datatypes,$fullindicies) =
1717: &LONCAPA::lonmetadata::describe_metadata_storage();
1718: unshift(@$datatypes,{name => 'id',
1719: type => 'MEDIUMINT',
1720: restrictions => 'UNSIGNED NOT NULL',
1721: primary_key => 'yes',
1722: auto_inc => 'yes' });
1723: @Datatypes = @{$datatypes};
1724: @Fullindicies = @{$fullindicies};
1725: return;
1726: }
1727:
1728: sub create_results_table {
1729: &set_up_table_structure();
1730: my $table = &Apache::lonmysql::create_table
1731: ( { columns => \@Datatypes,
1732: FULLTEXT => [{'columns' => \@Fullindicies},],
1733: } );
1734: if (defined($table)) {
1735: $ENV{'form.table'} = $table;
1736: return $table;
1737: }
1738: return undef; # Error...
1739: }
1740:
1741: ######################################################################
1742: ######################################################################
1743:
1744: =pod
1745:
1746: =item Search Status update functions
1747:
1748: Each of the following functions changes the values of one of the
1749: input fields used to display the search status to the user. The names
1750: should be explanatory.
1751:
1752: Inputs: Apache request handler ($r), text to display.
1753:
1754: Returns: Nothing.
1755:
1756: =over 4
1757:
1758: =item &update_count_status()
1759:
1760: =item &update_status()
1761:
1762: =item &update_seconds()
1763:
1764: =back
1765:
1766: =cut
1767:
1768: ######################################################################
1769: ######################################################################
1770: sub update_count_status {
1771: my ($r,$text) = @_;
1772: $text =~ s/\'/\\\'/g;
1773: $r->print
1774: ("<script>document.statusform.count.value = ' $text'</script>\n");
1775: $r->rflush();
1776: }
1777:
1778: sub update_status {
1779: my ($r,$text) = @_;
1780: $text =~ s/\'/\\\'/g;
1781: $r->print
1782: ("<script>document.statusform.status.value = ' $text'</script>\n");
1783: $r->rflush();
1784: }
1785:
1786: sub update_seconds {
1787: my ($r,$text) = @_;
1788: $text =~ s/\'/\\\'/g;
1789: $r->print
1790: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1791: $r->rflush();
1792: }
1793:
1794: ######################################################################
1795: ######################################################################
1796:
1797: =pod
1798:
1799: =item &revise_button()
1800:
1801: Inputs: None
1802:
1803: Returns: html string for a 'revise search' button.
1804:
1805: =cut
1806:
1807: ######################################################################
1808: ######################################################################
1809: sub revise_button {
1810: my $revise_phase = 'disp_basic';
1811: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1812: my $newloc = '/adm/searchcat'.
1813: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1814: '&cleargroupsort=1'.
1815: '&phase='.$revise_phase;
1816: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1817: qq{ onClick="parent.location='$newloc';" /> };
1818: return $result;
1819: }
1820:
1821: ######################################################################
1822: ######################################################################
1823:
1824: =pod
1825:
1826: =item &run_search()
1827:
1828: Executes a search query by sending it the the other servers and putting the
1829: results into MySQL.
1830:
1831: =cut
1832:
1833: ######################################################################
1834: ######################################################################
1835: sub run_search {
1836: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1837: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1838: my $connection = $r->connection;
1839: #
1840: # Timing variables
1841: #
1842: my $starttime = time;
1843: my $max_time = 30; # seconds for the search to complete
1844: #
1845: # Print run_search header
1846: #
1847: $r->print(<<END);
1848: <html>
1849: <head><title>Search Status</title></head>
1850: $bodytag
1851: <form name="statusform" action="" method="post">
1852: <input type="hidden" name="Queue" value="" />
1853: END
1854: # Check to see if $pretty_string has more than one carriage return.
1855: # Assume \n s are following <br /> s and truncate the value.
1856: # (there is probably a better way)...
1857: my @Lines = split /<br \/>/,$pretty_string;
1858: if (@Lines > 2) {
1859: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1860: }
1861: $r->print(&mt("Search").": ".$pretty_string);
1862: $r->rflush();
1863: #
1864: # Determine the servers we need to contact.
1865: my @Servers_to_contact;
1866: if (defined($serverlist)) {
1867: if (ref($serverlist) eq 'ARRAY') {
1868: @Servers_to_contact = @$serverlist;
1869: } else {
1870: @Servers_to_contact = ($serverlist);
1871: }
1872: } else {
1873: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1874: }
1875: my %Server_status;
1876: my $table =$ENV{'form.table'};
1877: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1878: $r->print("Unable to determine table id to store search results in.".
1879: "The search has been aborted.</body></html>");
1880: return;
1881: }
1882: my $table_status = &Apache::lonmysql::check_table($table);
1883: if (! defined($table_status)) {
1884: $r->print("Unable to determine status of table.</body></html>");
1885: &Apache::lonnet::logthis("Bogus table id of $table for ".
1886: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1887: &Apache::lonnet::logthis("lonmysql error = ".
1888: &Apache::lonmysql::get_error());
1889: return;
1890: }
1891: if (! $table_status) {
1892: &Apache::lonnet::logthis("lonmysql error = ".
1893: &Apache::lonmysql::get_error());
1894: &Apache::lonnet::logthis("lonmysql debug = ".
1895: &Apache::lonmysql::get_debug());
1896: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
1897: $r->print("The table id,$table, we tried to use is invalid.".
1898: "The search has been aborted.</body></html>");
1899: return;
1900: }
1901: ##
1902: ## Prepare for the big loop.
1903: my $hitcountsum;
1904: my $server;
1905: my $status;
1906: my $revise = &revise_button();
1907: $r->print(<<END);
1908: <table>
1909: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1910: <tr>
1911: <td><input type="text" name="status" value="" size="30" /></td>
1912: <td><input type="text" name="count" value="" size="10" /></td>
1913: <td><input type="text" name="seconds" value="" size="8" /></td>
1914: <td>$revise</td>
1915: </tr>
1916: </table>
1917: </form>
1918: END
1919: $r->rflush();
1920: my $time_remaining = $max_time - (time - $starttime) ;
1921: my $last_time = $time_remaining;
1922: &update_seconds($r,$time_remaining);
1923: &update_status($r,'contacting '.$Servers_to_contact[0]);
1924: while (($time_remaining > 0) &&
1925: ((@Servers_to_contact) || keys(%Server_status))) {
1926: # Send out a search request if it needs to be done.
1927: if (@Servers_to_contact) {
1928: # Contact one server
1929: my $server = shift(@Servers_to_contact);
1930: &update_status($r,&mt('contacting').' '.$server);
1931: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1932: $customshow,[$server]);
1933: ($server) = keys(%$reply);
1934: $Server_status{$server} = $reply->{$server};
1935: } else {
1936: # wait a sec. to give time for files to be written
1937: # This sleep statement is here instead of outside the else
1938: # block because we do not want to pause if we have servers
1939: # left to contact.
1940: if (scalar (keys(%Server_status))) {
1941: &update_status($r,
1942: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1943: }
1944: sleep(1);
1945: }
1946: #
1947: # Loop through the servers we have contacted but do not
1948: # have results from yet, looking for results.
1949: while (my ($server,$status) = each(%Server_status)) {
1950: last if ($connection->aborted());
1951: if ($status eq 'con_lost') {
1952: delete ($Server_status{$server});
1953: next;
1954: }
1955: $status=~/^([\.\w]+)$/;
1956: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1957: if (-e $datafile && ! -e "$datafile.end") {
1958: &update_status($r,&mt('Receiving results from').' '.$server);
1959: next;
1960: }
1961: last if ($connection->aborted());
1962: if (-e "$datafile.end") {
1963: &update_status($r,&mt('Reading results from').' '.$server);
1964: if (-z "$datafile") {
1965: delete($Server_status{$server});
1966: next;
1967: }
1968: my $fh;
1969: if (!($fh=Apache::File->new($datafile))) {
1970: $r->print("Unable to open search results file for ".
1971: "server $server. Omitting from search");
1972: delete($Server_status{$server});
1973: next;
1974: }
1975: # Read in the whole file.
1976: while (my $result = <$fh>) {
1977: last if ($connection->aborted());
1978: # handle custom fields? Someday we will!
1979: chomp($result);
1980: next unless $result;
1981: # Parse the result.
1982: my %Fields = &parse_raw_result($result,$server);
1983: $Fields{'hostname'} = $server;
1984: next if (! ©right_check(\%Fields));
1985: # Store the result in the mysql database
1986: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1987: if (! defined($result)) {
1988: $r->print(&Apache::lonmysql::get_error());
1989: }
1990: # $r->print(&Apache::lonmysql::get_debug());
1991: $hitcountsum ++;
1992: $time_remaining = $max_time - (time - $starttime) ;
1993: if ($last_time - $time_remaining > 0) {
1994: &update_seconds($r,$time_remaining);
1995: $last_time = $time_remaining;
1996: }
1997: if ($hitcountsum % 50 == 0) {
1998: &update_count_status($r,$hitcountsum);
1999: }
2000: } # End of foreach (@results)
2001: $fh->close();
2002: # $server is only deleted if the results file has been
2003: # found and (successfully) opened. This may be a bad idea.
2004: delete($Server_status{$server});
2005: }
2006: last if ($connection->aborted());
2007: &update_count_status($r,$hitcountsum);
2008: }
2009: last if ($connection->aborted());
2010: # Finished looping through the servers
2011: $starttime = time if (@Servers_to_contact);
2012: $time_remaining = $max_time - (time - $starttime) ;
2013: if ($last_time - $time_remaining > 0) {
2014: $last_time = $time_remaining;
2015: &update_seconds($r,$time_remaining);
2016: }
2017: }
2018: &update_status($r,&mt('Search Complete').$server);
2019: &update_seconds($r,0);
2020: #
2021: &Apache::lonmysql::disconnect_from_db();
2022: #
2023: # We have run out of time or run out of servers to talk to and
2024: # results to get.
2025: $r->print("</body></html>");
2026: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2027: $r->print("<script>".
2028: "window.location='/adm/searchcat?".
2029: "phase=sort&".
2030: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2031: "</script>");
2032: }
2033: return;
2034: }
2035:
2036: ######################################################################
2037: ######################################################################
2038:
2039: =pod
2040:
2041: =item &prev_next_buttons()
2042:
2043: Returns html for the previous and next buttons on the search results page.
2044:
2045: =cut
2046:
2047: ######################################################################
2048: ######################################################################
2049: sub prev_next_buttons {
2050: my ($current_min,$show,$total,$parms) = @_;
2051: return '' if ($show eq 'all'); # No links if you get them all at once.
2052: my $links;
2053: ##
2054: ## Prev
2055: my $prev_min = $current_min - $show;
2056: $prev_min = 1 if $prev_min < 1;
2057: if ($prev_min < $current_min) {
2058: $links .=
2059: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
2060: &mt('prev').'</a>';
2061: } else {
2062: $links .= &mt('prev');
2063: }
2064: ##
2065: ## Pages.... Someday.
2066: ##
2067: $links .=
2068: qq{
2069: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
2070: &mt('reload').'</a>';
2071: ##
2072: ## Next
2073: my $next_min = $current_min + $show;
2074: $next_min = $current_min if ($next_min > $total);
2075: if ($next_min != $current_min) {
2076: $links .=
2077: qq{
2078: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
2079: &mt('next').'</a>';
2080: } else {
2081: $links .= ' '.&mt('next');
2082: }
2083: return $links;
2084: }
2085:
2086: ######################################################################
2087: ######################################################################
2088:
2089: =pod
2090:
2091: =item &display_results()
2092:
2093: Prints the results out for selection and perusal.
2094:
2095: =cut
2096:
2097: ######################################################################
2098: ######################################################################
2099: sub display_results {
2100: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2101: my $connection = $r->connection;
2102: $r->print(&search_results_header($importbutton,$closebutton));
2103: ##
2104: ## Set viewing function
2105: ##
2106: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2107: if (!defined($viewfunction)) {
2108: $r->print("Internal Error - Bad view selected.\n");
2109: $r->rflush();
2110: return;
2111: }
2112: ##
2113: ## $checkbox_num is a count of the number of checkboxes output on the
2114: ## page this is used only during catalogmode=groupsearch.
2115: my $checkbox_num = 0;
2116: ##
2117: ## Get the catalog controls setup
2118: ##
2119: my $action = "/adm/searchcat?phase=results";
2120: ##
2121: ## Deal with groupsearch by opening the groupsearch db file.
2122: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2123: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2124: &GDBM_WRCREAT(),0640)) {
2125: $r->print('Unable to store import results.</form></body></html>');
2126: $r->rflush();
2127: return;
2128: }
2129: }
2130: ##
2131: ## Prepare the table for querying
2132: my $table = $ENV{'form.table'};
2133: return if (! &ensure_db_and_table($r,$table));
2134: ##
2135: ## Get the number of results
2136: my $total_results = &Apache::lonmysql::number_of_rows($table);
2137: if (! defined($total_results)) {
2138: $r->print("A MySQL error has occurred.</form></body></html>");
2139: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2140: " of rows in table ".$table);
2141: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2142: return;
2143: }
2144: ##
2145: ## Determine how many results we need to get
2146: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2147: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2148: my $min = $ENV{'form.start'};
2149: my $max;
2150: if ($ENV{'form.show'} eq 'all') {
2151: $max = $total_results ;
2152: } else {
2153: $max = $min + $ENV{'form.show'} - 1;
2154: $max = $total_results if ($max > $total_results);
2155: }
2156: ##
2157: ## Output links (if necessary) for 'prev' and 'next' pages.
2158: $r->print
2159: ('<center>'.
2160: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2161: "table=".$ENV{'form.table'}.
2162: "&phase=results".
2163: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2164: ."</center>\n"
2165: );
2166: if ($total_results == 0) {
2167: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2168: '<h3>'.&mt('There are currently no results').'.</h3>'.
2169: "</form></body></html>");
2170: return;
2171: } else {
2172: $r->print
2173: ("<center>Results $min to $max out of $total_results</center>\n");
2174: }
2175: ##
2176: ## Get results from MySQL table
2177: my @Results = &Apache::lonmysql::get_rows($table,
2178: 'id>='.$min.' AND id<='.$max);
2179: ##
2180: ## Loop through the results and output them.
2181: foreach my $row (@Results) {
2182: if ($connection->aborted()) {
2183: &cleanup();
2184: return;
2185: }
2186: my %Fields = %{&parse_row(@$row)};
2187: my $output="<p>\n";
2188: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2189: $Fields{'id'},$checkbox_num++);
2190: # Render the result into html
2191: $output.= &$viewfunction($prefix,%Fields);
2192: # Print them out as they come in.
2193: $r->print($output);
2194: $r->rflush();
2195: }
2196: if (@Results < 1) {
2197: $r->print(&mt("There were no results matching your query"));
2198: } else {
2199: $r->print
2200: ('<center>'.
2201: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2202: "table=".$ENV{'form.table'}.
2203: "&phase=results".
2204: "&persistent_db_id=".
2205: $ENV{'form.persistent_db_id'})
2206: ."</center>\n"
2207: );
2208: }
2209: $r->print("</form></body></html>");
2210: $r->rflush();
2211: untie %groupsearch_db if (tied(%groupsearch_db));
2212: return;
2213: }
2214:
2215: ######################################################################
2216: ######################################################################
2217:
2218: =pod
2219:
2220: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2221:
2222: Returns html needed for the various catalog modes. Gets inputs from
2223: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2224:
2225: =cut
2226:
2227: ######################################################################
2228: ######################################################################
2229: sub catalogmode_output {
2230: my $output = '';
2231: my ($title,$url,$fnum,$checkbox_num) = @_;
2232: if ($ENV{'form.catalogmode'} eq 'interactive') {
2233: $title=~ s/\'/\\\'/g;
2234: if ($ENV{'form.catalogmode'} eq 'interactive') {
2235: $output.=<<END
2236: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2237: onClick="javascript:select_data('$title','$url')">
2238: </font>
2239: END
2240: }
2241: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2242: $groupsearch_db{"pre_${fnum}_link"}=$url;
2243: $groupsearch_db{"pre_${fnum}_title"}=$title;
2244: $output.=<<END;
2245: <font size='-1'>
2246: <input type="checkbox" name="returnvalues" value="SELECT"
2247: onClick="javascript:queue($checkbox_num,$fnum)" />
2248: </font>
2249: END
2250: }
2251: return $output;
2252: }
2253: ######################################################################
2254: ######################################################################
2255:
2256: =pod
2257:
2258: =item &parse_row()
2259:
2260: Parse a row returned from the database.
2261:
2262: =cut
2263:
2264: ######################################################################
2265: ######################################################################
2266: sub parse_row {
2267: my @Row = @_;
2268: my %Fields;
2269: if (! scalar(@Datatypes)) {
2270: &set_up_table_structure();
2271: }
2272: for (my $i=0;$i<=$#Row;$i++) {
2273: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2274: }
2275: $Fields{'language'} =
2276: &Apache::loncommon::languagedescription($Fields{'language'});
2277: $Fields{'copyrighttag'} =
2278: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2279: $Fields{'mimetag'} =
2280: &Apache::loncommon::filedescription($Fields{'mime'});
2281: return \%Fields;
2282: }
2283:
2284: ###########################################################
2285: ###########################################################
2286:
2287: =pod
2288:
2289: =item &parse_raw_result()
2290:
2291: Takes a line from the file of results and parse it. Returns a hash
2292: with keys according to column labels
2293:
2294: In addition, the following tags are set by calling the appropriate
2295: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2296:
2297: The 'title' field is set to "Untitled" if the title field is blank.
2298:
2299: 'abstract' and 'keywords' are truncated to 200 characters.
2300:
2301: =cut
2302:
2303: ###########################################################
2304: ###########################################################
2305: sub parse_raw_result {
2306: my ($result,$hostname) = @_;
2307: # conclude from self to others regarding fields
2308: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2309: (map {
2310: &Apache::lonnet::unescape($_);
2311: } (split(/\,/,$result)) );
2312: return %Fields;
2313: }
2314:
2315: ###########################################################
2316: ###########################################################
2317:
2318: =pod
2319:
2320: =item &handle_custom_fields()
2321:
2322: =cut
2323:
2324: ###########################################################
2325: ###########################################################
2326: sub handle_custom_fields {
2327: my @results = @{shift()};
2328: my $customshow='';
2329: my $extrashow='';
2330: my @customfields;
2331: if ($ENV{'form.customshow'}) {
2332: $customshow=$ENV{'form.customshow'};
2333: $customshow=~s/[^\w\s]//g;
2334: my @fields=map {
2335: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2336: } split(/\s+/,$customshow);
2337: @customfields=split(/\s+/,$customshow);
2338: if ($customshow) {
2339: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2340: }
2341: }
2342: my $customdata='';
2343: my %customhash;
2344: foreach my $result (@results) {
2345: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2346: my $tmp=$result;
2347: $tmp=~s/^custom\=//;
2348: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2349: } split(/\,/,$tmp);
2350: $customhash{$k}=$v;
2351: }
2352: }
2353: return ($extrashow,\@customfields,\%customhash);
2354: }
2355:
2356: ######################################################################
2357: ######################################################################
2358:
2359: =pod
2360:
2361: =item &search_results_header()
2362:
2363: Output the proper html headers and javascript code to deal with different
2364: calling modes.
2365:
2366: Takes most inputs directly from %ENV, except $mode.
2367:
2368: =over 4
2369:
2370: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2371:
2372: =back
2373:
2374: The following environment variables are checked:
2375:
2376: =over 4
2377:
2378: =item 'form.catalogmode'
2379:
2380: Checked for 'interactive' and 'groupsearch'.
2381:
2382: =item 'form.mode'
2383:
2384: Checked for existance & 'edit' mode.
2385:
2386: =item 'form.form'
2387:
2388: Contains the name of the form that has the input fields to set
2389:
2390: =item 'form.element'
2391:
2392: the name of the input field to put the URL into
2393:
2394: =item 'form.titleelement'
2395:
2396: the name of the input field to put the title into
2397:
2398: =back
2399:
2400: =cut
2401:
2402: ######################################################################
2403: ######################################################################
2404: sub search_results_header {
2405: my ($importbutton,$closebutton) = @_;
2406: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2407: my $result = '';
2408: # output beginning of search page
2409: # conditional output of script functions dependent on the mode in
2410: # which the search was invoked
2411: if ($ENV{'form.catalogmode'} eq 'interactive'){
2412: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2413: $result.=<<SCRIPT;
2414: <script type="text/javascript">
2415: function select_data(title,url) {
2416: changeTitle(title);
2417: changeURL(url);
2418: parent.close();
2419: }
2420: function changeTitle(val) {
2421: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2422: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2423: }
2424: }
2425: function changeURL(val) {
2426: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2427: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2428: }
2429: }
2430: </script>
2431: SCRIPT
2432: } elsif ($ENV{'form.mode'} eq 'edit') {
2433: my $form = $ENV{'form.form'};
2434: my $element = $ENV{'form.element'};
2435: my $titleelement = $ENV{'form.titleelement'};
2436: my $changetitle;
2437: if (!$titleelement) {
2438: $changetitle='function changeTitle(val) {}';
2439: } else {
2440: $changetitle=<<END;
2441: function changeTitle(val) {
2442: if (parent.targetwin.document) {
2443: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2444: } else {
2445: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2446: alert("Unable to transfer data to "+url);
2447: }
2448: }
2449: END
2450: }
2451:
2452: $result.=<<SCRIPT;
2453: <script type="text/javascript">
2454: function select_data(title,url) {
2455: changeURL(url);
2456: changeTitle(title);
2457: parent.close();
2458: }
2459: $changetitle
2460: function changeURL(val) {
2461: if (parent.targetwin.document) {
2462: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2463: } else {
2464: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2465: alert("Unable to transfer data to "+url);
2466: }
2467: }
2468: </script>
2469: SCRIPT
2470: }
2471: }
2472: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2473: <script type="text/javascript">
2474: function queue(checkbox_num,val) {
2475: if (document.forms.results.returnvalues.length != "undefined" &&
2476: typeof(document.forms.results.returnvalues.length) == "number") {
2477: if (document.forms.results.returnvalues[checkbox_num].checked) {
2478: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2479: } else {
2480: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2481: }
2482: } else {
2483: if (document.forms.results.returnvalues.checked) {
2484: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2485: } else {
2486: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2487: }
2488: }
2489: }
2490: function select_group() {
2491: parent.window.location=
2492: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2493: parent.statusframe.document.forms.statusform.elements.Queue.value;
2494: }
2495: </script>
2496: SCRIPT
2497: $result.=<<END;
2498: </head>
2499: $bodytag
2500: <form name="results" method="post" action="" >
2501: <input type="hidden" name="Queue" value="" />
2502: $importbutton
2503: END
2504: return $result;
2505: }
2506:
2507: ######################################################################
2508: ######################################################################
2509: sub search_status_header {
2510: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2511: return <<ENDSTATUS;
2512: <html><head><title>Search Status</title></head>
2513: $bodytag
2514: <h3>Search Status</h3>
2515: Sending search request to LON-CAPA servers.<br />
2516: ENDSTATUS
2517: }
2518:
2519: sub results_link {
2520: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2521: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2522: my $results_link = $basic_link."&phase=results".
2523: "&pause=1"."&start=1";
2524: return $results_link;
2525: }
2526:
2527: ######################################################################
2528: ######################################################################
2529: sub print_frames_interface {
2530: my $r = shift;
2531: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2532: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2533: my $run_search_link = $basic_link."&phase=run_search";
2534: my $results_link = &results_link();
2535: my $result = <<"ENDFRAMES";
2536: <html>
2537: <head>
2538: <script>
2539: var targetwin = opener;
2540: var queue = '';
2541: </script>
2542: <title>LON-CAPA Digital Library Search Results</title>
2543: </head>
2544: <frameset rows="150,*">
2545: <frame name="statusframe" src="$run_search_link">
2546: <frame name="resultsframe" src="$results_link">
2547: </frameset>
2548: </html>
2549: ENDFRAMES
2550:
2551: $r->print($result);
2552: return;
2553: }
2554:
2555: ######################################################################
2556: ######################################################################
2557:
2558: =pod
2559:
2560: =item Metadata Viewing Functions
2561:
2562: Output is a HTML-ified string.
2563:
2564: Input arguments are title, author, subject, url, keywords, version,
2565: notes, short abstract, mime, language, creation date,
2566: last revision date, owner, copyright, hostname, and
2567: extra custom metadata to show.
2568:
2569: =over 4
2570:
2571: =item &detailed_citation_view()
2572:
2573: =cut
2574:
2575: ######################################################################
2576: ######################################################################
2577: sub detailed_citation_view {
2578: my ($prefix,%values) = @_;
2579: my $icon=&Apache::loncommon::icon($values{'url'});
2580: my $result=<<END;
2581: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2582: target='search_preview'>$values{'title'}</a></b>
2583: <p>
2584: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2585:
2586: <b>Subject: </b> $values{'subject'}<br />
2587: <b>Keyword(s): </b> $values{'keywords'}<br />
2588: <b>Notes: </b> $values{'notes'}<br />
2589: <b>MIME Type: </b> $values{'mimetag'}<br />
2590: <b>Language: </b> $values{'language'}<br />
2591: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2592: </p>
2593: $values{'extrashow'}
2594: <p>
2595: $values{'shortabstract'}
2596: </p>
2597: <hr align='left' width='200' noshade />
2598: END
2599: return $result;
2600: }
2601:
2602: ######################################################################
2603: ######################################################################
2604:
2605: =pod
2606:
2607: =item &summary_view()
2608:
2609: =cut
2610: ######################################################################
2611: ######################################################################
2612: sub summary_view {
2613: my ($prefix,%values) = @_;
2614: my $icon=&Apache::loncommon::icon($values{'url'});
2615: my $result=<<END;
2616: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2617: target='search_preview'>$values{'author'}</a><br />
2618: $values{'title'}<br />
2619: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2620: $values{'copyrighttag'}<br />
2621: $values{'extrashow'}
2622: </p>
2623: <hr align='left' width='200' noshade />
2624: END
2625: return $result;
2626: }
2627:
2628: ######################################################################
2629: ######################################################################
2630:
2631: =pod
2632:
2633: =item &compact_view()
2634:
2635: =cut
2636:
2637: ######################################################################
2638: ######################################################################
2639: sub compact_view {
2640: my ($prefix,%values) = @_;
2641: my $icon=&Apache::loncommon::icon($values{'url'});
2642: my $result=<<END;
2643: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2644: $values{'title'}</a>
2645: <b>$values{'author'}</b><br />
2646: END
2647: return $result;
2648: }
2649:
2650:
2651: ######################################################################
2652: ######################################################################
2653:
2654: =pod
2655:
2656: =item &fielded_format_view()
2657:
2658: =cut
2659:
2660: ######################################################################
2661: ######################################################################
2662: sub fielded_format_view {
2663: my ($prefix,%values) = @_;
2664: my $icon=&Apache::loncommon::icon($values{'url'});
2665: my $result=<<END;
2666: $prefix <img src="$icon" />
2667: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2668: target='search_preview'>$values{'url'}</a>
2669: <br />
2670: <b>Title:</b> $values{'title'}<br />
2671: <b>Author(s):</b> $values{'author'}<br />
2672: <b>Subject:</b> $values{'subject'}<br />
2673: <b>Keyword(s):</b> $values{'keywords'}<br />
2674: <b>Notes:</b> $values{'notes'}<br />
2675: <b>MIME Type:</b> $values{'mimetag'}<br />
2676: <b>Language:</b> $values{'language'}<br />
2677: <b>Creation Date:</b> $values{'creationdate'}<br />
2678: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2679: <b>Publisher/Owner:</b> $values{'owner'}<br />
2680: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2681: <b>Repository Location:</b> $values{'hostname'}<br />
2682: <b>Abstract:</b> $values{'shortabstract'}<br />
2683: $values{'extrashow'}
2684: </p>
2685: <hr align='left' width='200' noshade />
2686: END
2687: return $result;
2688: }
2689:
2690: ######################################################################
2691: ######################################################################
2692:
2693: =pod
2694:
2695: =item &xml_sgml_view()
2696:
2697: =back
2698:
2699: =cut
2700:
2701: ######################################################################
2702: ######################################################################
2703: sub xml_sgml_view {
2704: my ($prefix,%values) = @_;
2705: my $result=<<END;
2706: $prefix
2707: <pre>
2708: <LonCapaResource>
2709: <url>$values{'url'}</url>
2710: <title>$values{'title'}</title>
2711: <author>$values{'author'}</author>
2712: <subject>$values{'subject'}</subject>
2713: <keywords>$values{'keywords'}</keywords>
2714: <notes>$values{'notes'}</notes>
2715: <mimeInfo>
2716: <mime>$values{'mime'}</mime>
2717: <mimetag>$values{'mimetag'}</mimetag>
2718: </mimeInfo>
2719: <languageInfo>
2720: <language>$values{'language'}</language>
2721: <languagetag>$values{'languagetag'}</languagetag>
2722: </languageInfo>
2723: <creationdate>$values{'creationdate'}</creationdate>
2724: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2725: <owner>$values{'owner'}</owner>
2726: <copyrightInfo>
2727: <copyright>$values{'copyright'}</copyright>
2728: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2729: </copyrightInfo>
2730: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2731: <shortabstract>$values{'shortabstract'}</shortabstract>
2732: </LonCapaResource>
2733: </pre>
2734: $values{'extrashow'}
2735: <hr align='left' width='200' noshade />
2736: END
2737: return $result;
2738: }
2739:
2740: ######################################################################
2741: ######################################################################
2742:
2743: =pod
2744:
2745: =item &filled() see if field is filled.
2746:
2747: =cut
2748:
2749: ######################################################################
2750: ######################################################################
2751: sub filled {
2752: my ($field)=@_;
2753: if ($field=~/\S/ && $field ne 'any') {
2754: return 1;
2755: } else {
2756: return 0;
2757: }
2758: }
2759:
2760: ######################################################################
2761: ######################################################################
2762:
2763: =pod
2764:
2765: =item &output_blank_field_error()
2766:
2767: Output a complete page that indicates the user has not filled in enough
2768: information to do a search.
2769:
2770: Inputs: $r (Apache request handle), $closebutton, $parms.
2771:
2772: Returns: nothing
2773:
2774: $parms is extra information to include in the 'Revise search request' link.
2775:
2776: =cut
2777:
2778: ######################################################################
2779: ######################################################################
2780: sub output_blank_field_error {
2781: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2782: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2783: # make query information persistent to allow for subsequent revision
2784: $r->print(<<BEGINNING);
2785: <html>
2786: <head>
2787: <title>The LearningOnline Network with CAPA</title>
2788: BEGINNING
2789: $r->print(<<RESULTS);
2790: </head>
2791: $bodytag
2792: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2793: <h1>Search Catalog</h1>
2794: <form method="post" action="/adm/searchcat">
2795: $hidden_fields
2796: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2797: >Revise search request</a>
2798: $closebutton
2799: <hr />
2800: <h3>Unactionable search query.</h3>
2801: <p>
2802: You did not fill in enough information for the search to be started.
2803: You need to fill in relevant fields on the search page in order
2804: for a query to be processed.
2805: </p>
2806: </body>
2807: </html>
2808: RESULTS
2809: }
2810:
2811: ######################################################################
2812: ######################################################################
2813:
2814: =pod
2815:
2816: =item &output_date_error()
2817:
2818: Output a full html page with an error message.
2819:
2820: Inputs:
2821:
2822: $r, the request pointer.
2823: $message, the error message for the user.
2824: $closebutton, the specialized close button needed for groupsearch.
2825:
2826: =cut
2827:
2828: ######################################################################
2829: ######################################################################
2830: sub output_date_error {
2831: my ($r,$message,$closebutton,$hidden_fields)=@_;
2832: # make query information persistent to allow for subsequent revision
2833: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2834: $r->print(<<RESULTS);
2835: <html>
2836: <head>
2837: <title>The LearningOnline Network with CAPA</title>
2838: </head>
2839: $bodytag
2840: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2841: <h1>Search Catalog</h1>
2842: <form method="post" action="/adm/searchcat">
2843: $hidden_fields
2844: <input type='button' value='Revise search request'
2845: onClick='this.form.submit();' />
2846: $closebutton
2847: <hr />
2848: <h3>Error</h3>
2849: <p>
2850: $message
2851: </p>
2852: </body>
2853: </html>
2854: RESULTS
2855: }
2856:
2857: ######################################################################
2858: ######################################################################
2859:
2860: =pod
2861:
2862: =item &start_fresh_session()
2863:
2864: Cleans the global %groupsearch_db by removing all fields which begin with
2865: 'pre_' or 'store'.
2866:
2867: =cut
2868:
2869: ######################################################################
2870: ######################################################################
2871: sub start_fresh_session {
2872: delete $groupsearch_db{'mode_catalog'};
2873: foreach (keys %groupsearch_db) {
2874: if ($_ =~ /^pre_/) {
2875: delete $groupsearch_db{$_};
2876: }
2877: if ($_ =~ /^store/) {
2878: delete $groupsearch_db{$_};
2879: }
2880: }
2881: }
2882:
2883: 1;
2884:
2885: sub cleanup {
2886: if (tied(%groupsearch_db)) {
2887: unless (untie(%groupsearch_db)) {
2888: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2889: }
2890: }
2891: &untiehash();
2892: &Apache::lonmysql::disconnect_from_db();
2893: }
2894:
2895: __END__
2896:
2897: =pod
2898:
2899: =back
2900:
2901: =cut
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