1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.211 2004/04/19 17:44:47 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: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
340: 'needed table. lonmysql error:'.
341: $errorstring);
342: $r->print(<<END);
343: <html><head><title>Search Error</title></head>
344: $bodytag
345: Unable to create table in which to store search results.
346: The search has been aborted.
347: </body>
348: </html>
349: END
350: return OK;
351: }
352: delete($ENV{'form.launch'});
353: if (! &make_form_data_persistent($r,$persistent_db_file)) {
354: $r->print(<<END);
355: <html><head><title>Search Error</title></head>
356: $bodytag
357: Unable to properly store search information. The search has been aborted.
358: </body>
359: </html>
360: END
361: return OK;
362: }
363: #
364: # We are running a search
365: my ($query,$customquery,$customshow,$libraries) =
366: (undef,undef,undef,undef);
367: my $pretty_string;
368: if ($ENV{'form.phase'} eq 'basic_search') {
369: ($query,$pretty_string,$libraries) =
370: &parse_basic_search($r,$closebutton,$hidden_fields);
371: } else { # Advanced search
372: ($query,$customquery,$customshow,$libraries,$pretty_string)
373: = &parse_advanced_search($r,$closebutton,$hidden_fields);
374: return OK if (! defined($query));
375: }
376: &make_persistent({ query => $query,
377: customquery => $customquery,
378: customshow => $customshow,
379: libraries => $libraries,
380: pretty_string => $pretty_string },
381: $persistent_db_file);
382: ##
383: ## Print out the frames interface
384: ##
385: &print_frames_interface($r);
386: }
387: return OK;
388: }
389:
390: ######################################################################
391: ######################################################################
392: ##
393: ## Course Search
394: ##
395: ######################################################################
396: ######################################################################
397: { # Scope the course search to avoid global variables
398: #
399: # Variables For course search
400: my %alreadyseen;
401: my %hash;
402: my $totalfound;
403:
404: sub course_search {
405: my $r=shift;
406: my $bodytag=&Apache::loncommon::bodytag('Course Search').
407: &Apache::loncommon::help_open_bug('Searching');
408: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
409: my $search_string = $ENV{'form.courseexp'};
410: my @New_Words;
411: if ($ENV{'form.crsrelated'}) {
412: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
413: if (@New_Words) {
414: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
415: } else {
416: $pretty_search_string .= ' '.&mt('with no related words').".";
417: }
418: }
419: my $fulltext=$ENV{'form.crsfulltext'};
420: my @allwords=($search_string,@New_Words);
421: $totalfound=0;
422: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
423: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
424: $r->rflush();
425: # ======================================================= Go through the course
426: undef %alreadyseen;
427: %alreadyseen=();
428: my $c=$r->connection;
429: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
430: &GDBM_READER(),0640)) {
431: foreach (keys %hash) {
432: if ($c->aborted()) { last; }
433: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
434: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
435: @allwords);
436: }
437: }
438: untie(%hash);
439: }
440: unless ($totalfound) {
441: $r->print('<p>'.&mt('No resources found').'.</p>');
442: }
443: # =================================================== Done going through course
444: $r->print('</body></html>');
445: }
446:
447: # =============================== This pulls up a resource and its dependencies
448:
449: sub checkonthis {
450: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
451: $alreadyseen{$url}=1;
452: $r->rflush();
453: my $result=&Apache::lonnet::metadata($url,'title').' '.
454: &Apache::lonnet::metadata($url,'subject').' '.
455: &Apache::lonnet::metadata($url,'abstract').' '.
456: &Apache::lonnet::metadata($url,'keywords');
457: if (($url) && ($fulltext)) {
458: $result.=&Apache::lonnet::ssi_body($url);
459: }
460: $result=~s/\s+/ /gs;
461: my $applies=0;
462: foreach (@allwords) {
463: if ($_=~/\w/) {
464: if ($result=~/$_/si) {
465: $applies++;
466: }
467: }
468: }
469: # Does this resource apply?
470: if ($applies) {
471: $r->print('<br />');
472: for (my $i=0;$i<=$level*5;$i++) {
473: $r->print(' ');
474: }
475: $r->print('<a href="'.$url.'" target="cat">'.
476: ($title?$title:$url).'</a><br />');
477: $totalfound++;
478: } elsif ($fulltext) {
479: $r->print(' .');
480: }
481: $r->rflush();
482: # Check also the dependencies of this one
483: my $dependencies=
484: &Apache::lonnet::metadata($url,'dependencies');
485: foreach (split(/\,/,$dependencies)) {
486: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
487: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
488: }
489: }
490: }
491:
492: sub untiehash {
493: if (tied(%hash)) {
494: untie(%hash);
495: }
496: }
497:
498: } # End of course search scoping
499:
500: sub search_html_header {
501: my $Str = <<ENDHEADER;
502: <html>
503: <head>
504: <title>The LearningOnline Network with CAPA</title>
505: <script type="text/javascript">
506: function openhelp(val) {
507: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
508: 'scrollbars=1,width=600,height=300');
509: openhelpwin.focus();
510: }
511: </script>
512: </head>
513: ENDHEADER
514: return $Str;
515: }
516:
517: ######################################################################
518: ######################################################################
519:
520: =pod
521:
522: =item &print_basic_search_form()
523:
524: Prints the form for the basic search. Sorry the name is so cryptic.
525:
526: =cut
527:
528: ######################################################################
529: ######################################################################
530: sub print_basic_search_form {
531: my ($r,$closebutton,$hidden_fields) = @_;
532: my $bodytag=&Apache::loncommon::bodytag('Search').
533: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Finding_Resources',
534: undef,undef,! $ENV{'form.launch'});
535: my $scrout = &search_html_header().$bodytag;
536: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
537: my $Statement=&searchhelp();
538: $scrout.=(<<ENDDOCUMENT);
539: <form name="loncapa_search" method="post" action="/adm/searchcat">
540: <input type="hidden" name="phase" value="basic_search" />
541: $hidden_fields
542: <p>
543: $Statement.
544: </p>
545: <p>
546: <table>
547: <tr><td>
548: ENDDOCUMENT
549: $scrout.=' '.
550: &Apache::lonhtmlcommon::textbox('basicexp',
551: $ENV{'form.basicexp'},40).
552: ' ';
553: my $relatedcheckbox =
554: &Apache::lonhtmlcommon::checkbox('related',
555: $ENV{'form.related'});
556: my $domain = $r->dir_config('lonDefDomain');
557: my $domaincheckbox =
558: &Apache::lonhtmlcommon::checkbox('domains',
559: $ENV{'form.domains'});
560: my $srch=&mt('Search');
561: my $header=&mt('Advanced Search');
562: my $userelatedwords=&mt('use related words');
563: my $onlysearchdomain=&mt('only search domain');
564: my $view=&viewoptions();
565: $scrout.=<<END;
566: </td><td><a
567: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
568: >$header</a></td></tr>
569: <tr><td>$relatedcheckbox $userelatedwords</td>
570: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
571: </table>
572: </p>
573: $view
574: <p>
575: <input type="submit" name="basicsubmit" value='$srch' />
576: $closebutton
577: END
578: $scrout.=<<ENDDOCUMENT;
579: </p>
580: </form>
581: ENDDOCUMENT
582: }
583: if ($ENV{'request.course.id'}) {
584: my %lt=&Apache::lonlocal::texthash(
585: 'srch' => 'Search',
586: 'header' => 'Course Search',
587: 'note' => 'Enter terms or phrases, then press "Search" below',
588: 'use' => 'use related words',
589: 'full' =>'fulltext search (time consuming)'
590: );
591: $scrout.=(<<ENDCOURSESEARCH);
592: <hr />
593: <h1>$lt{'header'}</h1>
594: <form name="course_search" method="post" action="/adm/searchcat">
595: <input type="hidden" name="phase" value="course_search" />
596: $hidden_fields
597: <p>
598: $lt{'note'}.
599: </p>
600: <p>
601: <table>
602: <tr><td>
603: ENDCOURSESEARCH
604: $scrout.=' '.
605: &Apache::lonhtmlcommon::textbox('courseexp',
606: $ENV{'form.courseexp'},40);
607: my $crscheckbox =
608: &Apache::lonhtmlcommon::checkbox('crsfulltext',
609: $ENV{'form.crsfulltext'});
610: my $relcheckbox =
611: &Apache::lonhtmlcommon::checkbox('crsrelated',
612: $ENV{'form.crsrelated'});
613: $scrout.=(<<ENDENDCOURSE);
614: </td></tr>
615: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
616: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
617: </table><p>
618: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
619: </p>
620: ENDENDCOURSE
621: }
622: $scrout.=(<<ENDDOCUMENT);
623: </body>
624: </html>
625: ENDDOCUMENT
626: $r->print($scrout);
627: return;
628: }
629: ######################################################################
630: ######################################################################
631:
632: =pod
633:
634: =item &advanced_search_form()
635:
636: Prints the advanced search form.
637:
638: =cut
639:
640: ######################################################################
641: ######################################################################
642: sub print_advanced_search_form{
643: my ($r,$closebutton,$hidden_fields) = @_;
644: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
645: 'reset' => 'Reset',
646: 'help' => 'Help');
647: my $advanced_buttons = <<"END";
648: <p>
649: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
650: <input type="reset" name="reset" value='$lt{"reset"}' />
651: $closebutton
652: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
653: END
654: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
655: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
656: 'Finding_Resources',
657: undef,undef,
658: ! $ENV{'form.launch'});
659: my $searchhelp=&searchhelp();
660: my $scrout=&search_html_header();
661: $scrout .= <<"ENDHEADER";
662: $bodytag
663: <form method="post" action="/adm/searchcat" name="advsearch">
664: $advanced_buttons
665: ENDHEADER
666: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
667: '<input type="hidden" name="phase" value="adv_search" />';
668: my %fields=&Apache::lonmeta::fieldnames();
669: #
670: $scrout.= '<p>'.$searchhelp.'</p>'.
671: "<table>\n";
672: my %related_word_search =
673: ('title'=>1,
674: 'author'=>0,
675: 'owner'=>0,
676: 'authorspace'=>0,
677: 'modifyinguser'=>0,
678: 'keywords'=>1,
679: 'notes'=>1,
680: 'abstract'=>1,
681: 'standards'=>1,
682: 'mime'=>1,
683: );
684: #
685: foreach my $field ('title','author','owner','authorspace','modifyinguser',
686: 'keywords','notes','abstract','standards','mime') {
687: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
688: &Apache::lonmeta::prettyinput($field,
689: $ENV{'form.'.$field},
690: $field,
691: 'advsearch',
692: $related_word_search{$field},
693: '</td><td align="left">',
694: $ENV{'form.'.$field.'_related'},
695: 50);
696: if ($related_word_search{$field}) {
697: $scrout .= 'related words';
698: } else {
699: $scrout .= '</td><td> ';
700: }
701: $scrout .= '</td></tr>'.$/;
702: }
703: foreach my $field ('lowestgradelevel','highestgradelevel') {
704: $scrout.='<tr>'.
705: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
706: '<td colspan="2">'.
707: &Apache::lonmeta::prettyinput($field,
708: $ENV{'form.'.$field},
709: $field,
710: 'advsearch',
711: 0).
712: '</td></tr>'.$/;
713: }
714: $scrout.='<tr><td align="right">'.
715: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
716: &Apache::loncommon::filecategoryselect('category',
717: $ENV{'form.category'}).
718: '</td></tr>'.$/;
719: $scrout.='<tr><td align="right" valign="top">'.
720: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
721: &Apache::loncommon::domain_select('domains',
722: $ENV{'form.domains'},1).
723: '</td></tr>'.$/;
724: $scrout .= "</table>\n<br />\n<table>\n";
725: my %dates=&Apache::lonlocal::texthash
726: ('creationdatestart' => 'Creation Date After',
727: 'creationdateend' => 'Creation Date Before',
728: 'lastrevisiondatestart' => 'Last Revision Date After',
729: 'lastrevisiondateend' => 'Last Revision Date Before');
730: foreach my $field (sort keys %dates) {
731: $scrout.='<tr>'.
732: '<td align="right">'.&titlefield($dates{$field}).'</td><td>'.
733: &Apache::lonhtmlcommon::date_setter('advsearch',$field,0,'',1).
734: '</td></tr>'.$/;
735: }
736: $scrout.="</table>\n";
737: $scrout.=<<ENDDOCUMENT;
738: $advanced_buttons
739: </form>
740: </body>
741: </html>
742: ENDDOCUMENT
743: $r->print($scrout);
744: return;
745: }
746:
747: ######################################################################
748: ######################################################################
749:
750: =pod
751:
752: =item &titlefield()
753:
754: Inputs: title text
755:
756: Outputs: titletext with font wrapper
757:
758: =cut
759:
760: ######################################################################
761: ######################################################################
762: sub titlefield {
763: my $title=shift;
764: return $title;
765: }
766:
767: ######################################################################
768: ######################################################################
769:
770: =pod
771:
772: =item viewoptiontext()
773:
774: Inputs: codename for view option
775:
776: Outputs: displayed text
777:
778: =cut
779:
780: ######################################################################
781: ######################################################################
782: sub viewoptiontext {
783: my $code=shift;
784: my %desc=&Apache::lonlocal::texthash
785: ('detailed' => "Detailed Citation View",
786: 'xml' => 'XML/SGML',
787: 'compact' => 'Compact View',
788: 'fielded' => 'Fielded Format',
789: 'summary' => 'Summary View');
790: return $desc{$code};
791: }
792:
793: ######################################################################
794: ######################################################################
795:
796: =pod
797:
798: =item viewoptions()
799:
800: Inputs: none
801:
802: Outputs: text for box with view options
803:
804: =cut
805:
806: ######################################################################
807: ######################################################################
808: sub viewoptions {
809: my $scrout="\n".'<nobr>';
810: if (! defined($ENV{'form.viewselect'})) {
811: $ENV{'form.viewselect'}='detailed';
812: }
813: $scrout.=&Apache::lonmeta::selectbox('viewselect',
814: $ENV{'form.viewselect'},
815: \&viewoptiontext,
816: sort(keys(%Views)));
817: $scrout.= ' ';
818: $scrout.=&Apache::lonmeta::selectbox('show',
819: $ENV{'form.show'},
820: undef,
821: (10,20,50,100,1000,10000));
822: $scrout .= (' 'x2).&mt('Records per Page').'</nobr>'.$/;
823: return $scrout;
824: }
825:
826: ######################################################################
827: ######################################################################
828:
829: =pod
830:
831: =item searchhelp()
832:
833: Inputs: none
834:
835: Outputs: return little blurb on how to enter searches
836:
837: =cut
838:
839: ######################################################################
840: ######################################################################
841: sub searchhelp {
842: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
843: }
844:
845: ######################################################################
846: ######################################################################
847:
848: =pod
849:
850: =item &get_persistent_form_data()
851:
852: Inputs: filename of database
853:
854: Outputs: returns undef on database errors.
855:
856: This function is the reverse of &make_persistent() for form data.
857: Retrieve persistent data from %persistent_db. Retrieved items will have their
858: values unescaped. If a form value already exists in $ENV, it will not be
859: overwritten. Form values that are array references may have values appended
860: to them.
861:
862: =cut
863:
864: ######################################################################
865: ######################################################################
866: sub get_persistent_form_data {
867: my $filename = shift;
868: return 0 if (! -e $filename);
869: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
870: &GDBM_READER(),0640));
871: #
872: # These make sure we do not get array references printed out as 'values'.
873: my %arrays_allowed = ('form.domains'=>1);
874: #
875: # Loop through the keys, looking for 'form.'
876: foreach my $name (keys(%persistent_db)) {
877: next if ($name !~ /^form./);
878: # Kludgification begins!
879: if ($name eq 'form.domains' &&
880: $ENV{'form.searchmode'} eq 'basic' &&
881: $ENV{'form.phase'} ne 'disp_basic') {
882: next;
883: }
884: # End kludge (hopefully)
885: next if (exists($ENV{$name}));
886: my @values = map {
887: &Apache::lonnet::unescape($_);
888: } split(',',$persistent_db{$name});
889: next if (@values <1);
890: if ($arrays_allowed{$name}) {
891: $ENV{$name} = [@values];
892: } else {
893: $ENV{$name} = $values[0] if ($values[0]);
894: }
895: }
896: untie (%persistent_db);
897: return 1;
898: }
899:
900: ######################################################################
901: ######################################################################
902:
903: =pod
904:
905: =item &get_persistent_data()
906:
907: Inputs: filename of database, ref to array of values to recover.
908:
909: Outputs: array of values. Returns undef on error.
910:
911: This function is the reverse of &make_persistent();
912: Retrieve persistent data from %persistent_db. Retrieved items will have their
913: values unescaped. If the item contains commas (before unescaping), the
914: returned value will be an array pointer.
915:
916: =cut
917:
918: ######################################################################
919: ######################################################################
920: sub get_persistent_data {
921: my $filename = shift;
922: my @Vars = @{shift()};
923: my @Values; # Return array
924: return undef if (! -e $filename);
925: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
926: &GDBM_READER(),0640));
927: foreach my $name (@Vars) {
928: if (! exists($persistent_db{$name})) {
929: push @Values, undef;
930: next;
931: }
932: my @values = map {
933: &Apache::lonnet::unescape($_);
934: } split(',',$persistent_db{$name});
935: if (@values <= 1) {
936: push @Values,$values[0];
937: } else {
938: push @Values,\@values;
939: }
940: }
941: untie (%persistent_db);
942: return @Values;
943: }
944:
945: ######################################################################
946: ######################################################################
947:
948: =pod
949:
950: =item &make_persistent()
951:
952: Inputs: Hash of values to save, filename of persistent database.
953:
954: Store variables away to the %persistent_db.
955: Values will be escaped. Values that are array pointers will have their
956: elements escaped and concatenated in a comma separated string.
957:
958: =cut
959:
960: ######################################################################
961: ######################################################################
962: sub make_persistent {
963: my %save = %{shift()};
964: my $filename = shift;
965: return undef if (! tie(%persistent_db,'GDBM_File',
966: $filename,&GDBM_WRCREAT(),0640));
967: foreach my $name (keys(%save)) {
968: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
969: # We handle array references, but not recursively.
970: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
971: $persistent_db{$name} = $store;
972: }
973: untie(%persistent_db);
974: return 1;
975: }
976:
977: ######################################################################
978: ######################################################################
979:
980: =pod
981:
982: =item &make_form_data_persistent()
983:
984: Inputs: filename of persistent database.
985:
986: Store most form variables away to the %persistent_db.
987: Values will be escaped. Values that are array pointers will have their
988: elements escaped and concatenated in a comma separated string.
989:
990: =cut
991:
992: ######################################################################
993: ######################################################################
994: sub make_form_data_persistent {
995: my $r = shift;
996: my $filename = shift;
997: my %save;
998: foreach (keys(%ENV)) {
999: next if (!/^form/ || /submit/);
1000: $save{$_} = $ENV{$_};
1001: }
1002: return &make_persistent(\%save,$filename);
1003: }
1004:
1005: ######################################################################
1006: ######################################################################
1007:
1008: =pod
1009:
1010: =item &parse_advanced_search()
1011:
1012: Parse advanced search form and return the following:
1013:
1014: =over 4
1015:
1016: =item $query Scalar containing an SQL query.
1017:
1018: =item $customquery Scalar containing a custom query.
1019:
1020: =item $customshow Scalar containing commands to show custom metadata.
1021:
1022: =item $libraries_to_query Reference to array of domains to search.
1023:
1024: =back
1025:
1026: =cut
1027:
1028: ######################################################################
1029: ######################################################################
1030: sub parse_advanced_search {
1031: my ($r,$closebutton,$hidden_fields)=@_;
1032: my $fillflag=0;
1033: my $pretty_search_string = "<br />\n";
1034: # Clean up fields for safety
1035: for my $field ('title','author','subject','keywords','url','version',
1036: 'creationdatestart_month','creationdatestart_day',
1037: 'creationdatestart_year','creationdateend_month',
1038: 'creationdateend_day','creationdateend_year',
1039: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1040: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1041: 'lastrevisiondateend_day','lastrevisiondateend_year',
1042: 'notes','abstract','extension','language','owner',
1043: 'custommetadata','customshow','category') {
1044: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1045: }
1046: foreach ('mode','form','element') {
1047: # is this required? Hmmm.
1048: next unless (exists($ENV{"form.$_"}));
1049: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1050: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1051: }
1052: # Preprocess the category form element.
1053: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1054: ref($ENV{'form.category'}));
1055: #
1056: # Check to see if enough information was filled in
1057: for my $field ('title','author','subject','keywords','url','version',
1058: 'notes','abstract','category','extension','language',
1059: 'owner','custommetadata') {
1060: if (&filled($ENV{"form.$field"})) {
1061: $fillflag++;
1062: }
1063: }
1064: unless ($fillflag) {
1065: &output_blank_field_error($r,$closebutton,
1066: 'phase=disp_adv',$hidden_fields);
1067: return ;
1068: }
1069: # Turn the form input into a SQL-based query
1070: my $query='';
1071: my @queries;
1072: my $font = '<font color="#800000" face="helvetica">';
1073: # Evaluate logical expression AND/OR/NOT phrase fields.
1074: foreach my $field ('title','author','subject','notes','abstract','url',
1075: 'keywords','version','owner','standards') {
1076: if ($ENV{'form.'.$field}) {
1077: my $searchphrase = $ENV{'form.'.$field};
1078: $pretty_search_string .= $font."$field</font> contains <b>".
1079: $searchphrase."</b>";
1080: if ($ENV{'form.'.$field.'_related'}) {
1081: my @New_Words;
1082: ($searchphrase,@New_Words) = &related_version($searchphrase);
1083: if (@New_Words) {
1084: $pretty_search_string .= " with related words: ".
1085: "<b>@New_Words</b>.";
1086: } else {
1087: $pretty_search_string .= " with no related words.";
1088: }
1089: }
1090: $pretty_search_string .= "<br />\n";
1091: push @queries,&build_SQL_query($field,$searchphrase);
1092: }
1093: }
1094: #
1095: # Make the 'mime' from 'form.category' and 'form.extension'
1096: #
1097: my $searchphrase;
1098: if (exists($ENV{'form.category'}) &&
1099: $ENV{'form.category'} !~ /^\s*$/ &&
1100: $ENV{'form.category'} ne 'any') {
1101: my @extensions = &Apache::loncommon::filecategorytypes
1102: ($ENV{'form.category'});
1103: if (scalar(@extensions) > 0) {
1104: $searchphrase = join(' OR ',@extensions);
1105: }
1106: }
1107: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1108: $searchphrase .= ' OR ' if (defined($searchphrase));
1109: my @extensions = split(/,/,$ENV{'form.extension'});
1110: $searchphrase .= join(' OR ',@extensions);
1111: }
1112: if (defined($searchphrase)) {
1113: push @queries,&build_SQL_query('mime',$searchphrase);
1114: $pretty_search_string .=$font.'mime</font> contains <b>'.
1115: $searchphrase.'</b><br />';
1116: }
1117: #
1118: # Evaluate option lists
1119: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1120: push @queries,"(language like \"$ENV{'form.language'}\")";
1121: $pretty_search_string.=$font."language</font>= ".
1122: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1123: "<br />\n";
1124: }
1125: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1126: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1127: $pretty_search_string.=$font."copyright</font> = ".
1128: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1129: "<br \>\n";
1130: }
1131: #
1132: # Evaluate date windows
1133: my $datequery=&build_date_queries(
1134: $ENV{'form.creationdatestart_month'},
1135: $ENV{'form.creationdatestart_day'},
1136: $ENV{'form.creationdatestart_year'},
1137: $ENV{'form.creationdateend_month'},
1138: $ENV{'form.creationdateend_day'},
1139: $ENV{'form.creationdateend_year'},
1140: $ENV{'form.lastrevisiondatestart_month'},
1141: $ENV{'form.lastrevisiondatestart_day'},
1142: $ENV{'form.lastrevisiondatestart_year'},
1143: $ENV{'form.lastrevisiondateend_month'},
1144: $ENV{'form.lastrevisiondateend_day'},
1145: $ENV{'form.lastrevisiondateend_year'},
1146: );
1147: # Test to see if date windows are legitimate
1148: if ($datequery=~/^Incorrect/) {
1149: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1150: return ;
1151: } elsif ($datequery) {
1152: # Here is where you would set up pretty_search_string to output
1153: # date query information.
1154: push @queries,$datequery;
1155: }
1156: #
1157: # Process form information for custom metadata querying
1158: my $customquery=undef;
1159: ##
1160: ## The custom metadata search was removed q long time ago mostly
1161: ## because I was unable to figureout exactly how it worked and could
1162: ## not imagine people actually using it. MH
1163: ##
1164: # if ($ENV{'form.custommetadata'}) {
1165: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1166: # $ENV{'form.custommetadata'}."</b><br />\n";
1167: # $customquery=&build_custommetadata_query('custommetadata',
1168: # $ENV{'form.custommetadata'});
1169: # }
1170: my $customshow=undef;
1171: # if ($ENV{'form.customshow'}) {
1172: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1173: # $ENV{'form.customshow'}."</b><br />\n";
1174: # $customshow=$ENV{'form.customshow'};
1175: # $customshow=~s/[^\w\s]//g;
1176: # my @fields=split(/\s+/,$customshow);
1177: # $customshow=join(" ",@fields);
1178: # }
1179: ##
1180: ## Deal with restrictions to given domains
1181: ##
1182: my ($libraries_to_query,$pretty_domains_string) =
1183: &parse_domain_restrictions();
1184: $pretty_search_string .= $pretty_domains_string."<br />\n";
1185: #
1186: if (@queries) {
1187: $query=join(" AND ",@queries);
1188: $query="select * from metadata where $query";
1189: } elsif ($customquery) {
1190: $query = '';
1191: }
1192: return ($query,$customquery,$customshow,$libraries_to_query,
1193: $pretty_search_string);
1194: }
1195:
1196: sub parse_domain_restrictions {
1197: my $libraries_to_query = undef;
1198: # $ENV{'form.domains'} can be either a scalar or an array reference.
1199: # We need an array.
1200: if (! exists($ENV{'form.domains'})) {
1201: return (undef,'');
1202: }
1203: my @allowed_domains;
1204: if (ref($ENV{'form.domains'})) {
1205: @allowed_domains = @{$ENV{'form.domains'}};
1206: } else {
1207: @allowed_domains = ($ENV{'form.domains'});
1208: }
1209: #
1210: my %domain_hash = ();
1211: my $pretty_domains_string;
1212: foreach (@allowed_domains) {
1213: $domain_hash{$_}++;
1214: }
1215: if ($domain_hash{'any'}) {
1216: $pretty_domains_string = "In all LON-CAPA domains.";
1217: } else {
1218: if (@allowed_domains > 1) {
1219: $pretty_domains_string = "In LON-CAPA domains:";
1220: } else {
1221: $pretty_domains_string = "In LON-CAPA domain ";
1222: }
1223: foreach (sort @allowed_domains) {
1224: $pretty_domains_string .= "<b>".$_."</b> ";
1225: }
1226: foreach (keys(%Apache::lonnet::libserv)) {
1227: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1228: push @$libraries_to_query,$_;
1229: }
1230: }
1231: }
1232: return ($libraries_to_query,$pretty_domains_string);
1233: }
1234:
1235: ######################################################################
1236: ######################################################################
1237:
1238: =pod
1239:
1240: =item &parse_basic_search()
1241:
1242: Parse the basic search form and return a scalar containing an sql query.
1243:
1244: =cut
1245:
1246: ######################################################################
1247: ######################################################################
1248: sub parse_basic_search {
1249: my ($r,$closebutton)=@_;
1250: #
1251: # Clean up fields for safety
1252: for my $field ('basicexp') {
1253: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1254: }
1255: foreach ('mode','form','element') {
1256: # is this required? Hmmm.
1257: next unless (exists($ENV{"form.$_"}));
1258: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1259: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1260: }
1261: my ($libraries_to_query,$pretty_domains_string) =
1262: &parse_domain_restrictions();
1263: #
1264: # Check to see if enough of a query is filled in
1265: unless (&filled($ENV{'form.basicexp'})) {
1266: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1267: return OK;
1268: }
1269: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1270: my $search_string = $ENV{'form.basicexp'};
1271: if ($ENV{'form.related'}) {
1272: my @New_Words;
1273: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1274: if (@New_Words) {
1275: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1276: } else {
1277: $pretty_search_string .= " with no related words.";
1278: }
1279: }
1280: #
1281: # Build SQL query string based on form page
1282: my $query='';
1283: my $concatarg=join(',',
1284: ('title', 'author', 'subject', 'notes', 'abstract',
1285: 'keywords'));
1286: $concatarg='title' if $ENV{'form.titleonly'};
1287: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1288: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1289: $pretty_search_string .= ' '.$pretty_domains_string;
1290: }
1291: $pretty_search_string .= "<br />\n";
1292: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1293: # &Apache::lonnet::logthis($final_query);
1294: return ($final_query,$pretty_search_string,
1295: $libraries_to_query);
1296: }
1297:
1298: ######################################################################
1299: ######################################################################
1300:
1301: =pod
1302:
1303: =item &related_version()
1304:
1305: Modifies an input string to include related words. Words in the string
1306: are replaced with parenthesized lists of 'OR'd words. For example
1307: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1308:
1309: Note: Using this twice on a string is probably silly.
1310:
1311: =cut
1312:
1313: ######################################################################
1314: ######################################################################
1315: sub related_version {
1316: my $search_string = shift;
1317: my $result = $search_string;
1318: my %New_Words = ();
1319: while ($search_string =~ /(\w+)/cg) {
1320: my $word = $1;
1321: next if (lc($word) =~ /\b(or|and|not)\b/);
1322: my @Words = &Apache::loncommon::get_related_words($word);
1323: @Words = ($#Words>4? @Words[0..4] : @Words);
1324: foreach (@Words) { $New_Words{$_}++;}
1325: my $replacement = join " OR ", ($word,@Words);
1326: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1327: }
1328: return $result,sort(keys(%New_Words));
1329: }
1330:
1331: ######################################################################
1332: ######################################################################
1333:
1334: =pod
1335:
1336: =item &build_SQL_query()
1337:
1338: Builds a SQL query string from a logical expression with AND/OR keywords
1339: using Text::Query and &recursive_SQL_query_builder()
1340:
1341: =cut
1342:
1343: ######################################################################
1344: ######################################################################
1345: sub build_SQL_query {
1346: my ($field_name,$logic_statement)=@_;
1347: my $q=new Text::Query('abc',
1348: -parse => 'Text::Query::ParseAdvanced',
1349: -build => 'Text::Query::Build');
1350: $q->prepare($logic_statement);
1351: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1352: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1353: return $sql_query;
1354: }
1355:
1356: ######################################################################
1357: ######################################################################
1358:
1359: =pod
1360:
1361: =item &build_custommetadata_query()
1362:
1363: Constructs a custom metadata query using a rather heinous regular
1364: expression.
1365:
1366: =cut
1367:
1368: ######################################################################
1369: ######################################################################
1370: sub build_custommetadata_query {
1371: my ($field_name,$logic_statement)=@_;
1372: my $q=new Text::Query('abc',
1373: -parse => 'Text::Query::ParseAdvanced',
1374: -build => 'Text::Query::BuildAdvancedString');
1375: $q->prepare($logic_statement);
1376: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1377: # quick fix to change literal into xml tag-matching
1378: # will eventually have to write a separate builder module
1379: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1380: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1381: /\\<$1\\>?# \<wordone\>
1382: \[\^\\<\]?# [^\<]
1383: \*$2\[\^\\<\]?# *wordtwo[^\<]
1384: \*\\<\\\/$1\\>?# *\<\/wordone\>
1385: /g;
1386: return $matchexp;
1387: }
1388:
1389: ######################################################################
1390: ######################################################################
1391:
1392: =pod
1393:
1394: =item &recursive_SQL_query_build()
1395:
1396: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1397:
1398: =cut
1399:
1400: ######################################################################
1401: ######################################################################
1402: sub recursive_SQL_query_build {
1403: my ($dkey,$pattern)=@_;
1404: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1405: return $pattern unless @matches;
1406: foreach my $match (@matches) {
1407: $match=~/\[ (\w+)\s(.*) \]/;
1408: my ($key,$value)=($1,$2);
1409: my $replacement='';
1410: if ($key eq 'literal') {
1411: $replacement="($dkey LIKE \"\%$value\%\")";
1412: } elsif (lc($key) eq 'not') {
1413: $value=~s/LIKE/NOT LIKE/;
1414: # $replacement="($dkey not like $value)";
1415: $replacement="$value";
1416: } elsif ($key eq 'and') {
1417: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1418: $replacement="($1 AND $2)";
1419: } elsif ($key eq 'or') {
1420: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1421: $replacement="($1 OR $2)";
1422: }
1423: substr($pattern,
1424: index($pattern,$match),
1425: length($match),
1426: $replacement);
1427: }
1428: &recursive_SQL_query_build($dkey,$pattern);
1429: }
1430:
1431: ######################################################################
1432: ######################################################################
1433:
1434: =pod
1435:
1436: =item &build_date_queries()
1437:
1438: Builds a SQL logic query to check time/date entries.
1439: Also reports errors (check for /^Incorrect/).
1440:
1441: =cut
1442:
1443: ######################################################################
1444: ######################################################################
1445: sub build_date_queries {
1446: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1447: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1448: my @queries;
1449: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1450: unless ($cmonth1 and $cday1 and $cyear1 and
1451: $cmonth2 and $cday2 and $cyear2) {
1452: return "Incorrect entry for the creation date. You must specify ".
1453: "a starting month, day, and year and an ending month, ".
1454: "day, and year.";
1455: }
1456: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1457: $cnumeric1+=0;
1458: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1459: $cnumeric2+=0;
1460: if ($cnumeric1>$cnumeric2) {
1461: return "Incorrect entry for the creation date. The starting ".
1462: "date must occur before the ending date.";
1463: }
1464: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1465: "$cyear2-$cmonth2-$cday2 23:59:59')";
1466: push @queries,$cquery;
1467: }
1468: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1469: unless ($lmonth1 and $lday1 and $lyear1 and
1470: $lmonth2 and $lday2 and $lyear2) {
1471: return "Incorrect entry for the last revision date. You must ".
1472: "specify a starting month, day, and year and an ending ".
1473: "month, day, and year.";
1474: }
1475: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1476: $lnumeric1+=0;
1477: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1478: $lnumeric2+=0;
1479: if ($lnumeric1>$lnumeric2) {
1480: return "Incorrect entry for the last revision date. The ".
1481: "starting date must occur before the ending date.";
1482: }
1483: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1484: "$lyear2-$lmonth2-$lday2 23:59:59')";
1485: push @queries,$lquery;
1486: }
1487: if (@queries) {
1488: return join(" AND ",@queries);
1489: }
1490: return '';
1491: }
1492:
1493: ######################################################################
1494: ######################################################################
1495:
1496: =pod
1497:
1498: =item ©right_check()
1499:
1500: Inputs: $Metadata, a hash pointer of metadata for a resource.
1501:
1502: Returns: 1 if the resource is available to the user making the query,
1503: 0 otherwise.
1504:
1505: =cut
1506:
1507: ######################################################################
1508: ######################################################################
1509: sub copyright_check {
1510: my $Metadata = shift;
1511: # Check copyright tags and skip results the user cannot use
1512: my (undef,undef,$resdom,$resname) = split('/',
1513: $Metadata->{'url'});
1514: # Check for priv
1515: if (($Metadata->{'copyright'} eq 'priv') &&
1516: (($ENV{'user.name'} ne $resname) &&
1517: ($ENV{'user.domain'} ne $resdom))) {
1518: return 0;
1519: }
1520: # Check for domain
1521: if (($Metadata->{'copyright'} eq 'domain') &&
1522: ($ENV{'user.domain'} ne $resdom)) {
1523: return 0;
1524: }
1525: return 1;
1526: }
1527:
1528: ######################################################################
1529: ######################################################################
1530:
1531: =pod
1532:
1533: =item &ensure_db_and_table()
1534:
1535: Ensure we can get lonmysql to connect to the database and the table we
1536: need exists.
1537:
1538: Inputs: $r, table id
1539:
1540: Returns: undef on error, 1 if the table exists.
1541:
1542: =cut
1543:
1544: ######################################################################
1545: ######################################################################
1546: sub ensure_db_and_table {
1547: my ($r,$table) = @_;
1548: ##
1549: ## Sanity check the table id.
1550: ##
1551: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1552: $r->print("Unable to retrieve search results. ".
1553: "Unable to determine the table results were stored in. ".
1554: "</body></html>");
1555: return undef;
1556: }
1557: ##
1558: ## Make sure we can connect and the table exists.
1559: ##
1560: my $connection_result = &Apache::lonmysql::connect_to_db();
1561: if (!defined($connection_result)) {
1562: $r->print("Unable to connect to the MySQL database where your results".
1563: " are stored. </body></html>");
1564: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1565: " connect to database.");
1566: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1567: return undef;
1568: }
1569: my $table_check = &Apache::lonmysql::check_table($table);
1570: if (! defined($table_check)) {
1571: $r->print("A MySQL error has occurred.</form></body></html>");
1572: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1573: " of table ".$table);
1574: return undef;
1575: } elsif (! $table_check) {
1576: $r->print("The table of results could not be found.");
1577: &Apache::lonnet::logthis("The user requested a table, ".$table.
1578: ", that could not be found.");
1579: return undef;
1580: }
1581: return 1;
1582: }
1583:
1584: ######################################################################
1585: ######################################################################
1586:
1587: =pod
1588:
1589: =item &print_sort_form()
1590:
1591: The sort feature is not implemented at this time. This form just prints
1592: a link to change the search query.
1593:
1594: =cut
1595:
1596: ######################################################################
1597: ######################################################################
1598: sub print_sort_form {
1599: my ($r,$pretty_query_string) = @_;
1600: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1601: ##
1602: my %SortableFields=&Apache::lonlocal::texthash(
1603: id => 'Default',
1604: title => 'Title',
1605: author => 'Author',
1606: subject => 'Subject',
1607: url => 'URL',
1608: version => 'Version Number',
1609: mime => 'Mime type',
1610: lang => 'Language',
1611: owner => 'Owner/Publisher',
1612: copyright => 'Copyright',
1613: hostname => 'Host',
1614: creationdate => 'Creation Date',
1615: lastrevisiondate => 'Revision Date'
1616: );
1617: ##
1618: my $table = $ENV{'form.table'};
1619: return if (! &ensure_db_and_table($r,$table));
1620: ##
1621: ## Get the number of results
1622: ##
1623: my $total_results = &Apache::lonmysql::number_of_rows($table);
1624: if (! defined($total_results)) {
1625: $r->print("A MySQL error has occurred.</form></body></html>");
1626: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1627: " of rows in table ".$table);
1628: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1629: return;
1630: }
1631: my $result;
1632: $result.=<<END;
1633: <html>
1634: <head>
1635: <script>
1636: function change_sort() {
1637: var newloc = "/adm/searchcat?phase=results";
1638: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1639: newloc += "&sortby=";
1640: newloc += document.forms.statusform.elements.sortby.value;
1641: parent.resultsframe.location= newloc;
1642: }
1643: </script>
1644: <title>Results</title>
1645: </head>
1646: $bodytag
1647: <form name="statusform" action="" method="post">
1648: <input type="hidden" name="Queue" value="" />
1649: END
1650:
1651: #<h2>Sort Results</h2>
1652: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1653: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1654: # foreach (keys(%SortableFields)) {
1655: # $result.="<option name=\"$_\"";
1656: # if ($_ eq $ENV{'form.sortby'}) {
1657: # $result.=" selected ";
1658: # }
1659: # $result.=" >$SortableFields{$_}</option>\n";
1660: # }
1661: # $result.="</select>\n";
1662: my $revise = &revise_button();
1663: $result.=<<END;
1664: <p>
1665: There are $total_results matches to your query. $revise
1666: </p><p>
1667: Search:$pretty_query_string
1668: </p>
1669: </form>
1670: </body>
1671: </html>
1672: END
1673: $r->print($result);
1674: return;
1675: }
1676:
1677: #####################################################################
1678: #####################################################################
1679:
1680: =pod
1681:
1682: =item MySQL Table Description
1683:
1684: MySQL table creation requires a precise description of the data to be
1685: stored. The use of the correct types to hold data is vital to efficient
1686: storage and quick retrieval of records. The columns must be described in
1687: the following format:
1688:
1689: =cut
1690:
1691: #####################################################################
1692: #####################################################################
1693: #
1694: # These should probably be scoped but I don't have time right now...
1695: #
1696: my @Datatypes;
1697: my @Fullindicies;
1698:
1699: ######################################################################
1700: ######################################################################
1701:
1702: =pod
1703:
1704: =item &create_results_table()
1705:
1706: Creates the table of search results by calling lonmysql. Stores the
1707: table id in $ENV{'form.table'}
1708:
1709: Inputs: none.
1710:
1711: Returns: the identifier of the table on success, undef on error.
1712:
1713: =cut
1714:
1715: ######################################################################
1716: ######################################################################
1717: sub set_up_table_structure {
1718: my ($datatypes,$fullindicies) =
1719: &LONCAPA::lonmetadata::describe_metadata_storage();
1720: unshift(@$datatypes,{name => 'id',
1721: type => 'MEDIUMINT',
1722: restrictions => 'UNSIGNED NOT NULL',
1723: primary_key => 'yes',
1724: auto_inc => 'yes' });
1725: @Datatypes = @{$datatypes};
1726: @Fullindicies = @{$fullindicies};
1727: return;
1728: }
1729:
1730: sub create_results_table {
1731: &set_up_table_structure();
1732: my $table = &Apache::lonmysql::create_table
1733: ( { columns => \@Datatypes,
1734: FULLTEXT => [{'columns' => \@Fullindicies},],
1735: } );
1736: if (defined($table)) {
1737: $ENV{'form.table'} = $table;
1738: return $table;
1739: }
1740: return undef; # Error...
1741: }
1742:
1743: ######################################################################
1744: ######################################################################
1745:
1746: =pod
1747:
1748: =item Search Status update functions
1749:
1750: Each of the following functions changes the values of one of the
1751: input fields used to display the search status to the user. The names
1752: should be explanatory.
1753:
1754: Inputs: Apache request handler ($r), text to display.
1755:
1756: Returns: Nothing.
1757:
1758: =over 4
1759:
1760: =item &update_count_status()
1761:
1762: =item &update_status()
1763:
1764: =item &update_seconds()
1765:
1766: =back
1767:
1768: =cut
1769:
1770: ######################################################################
1771: ######################################################################
1772: sub update_count_status {
1773: my ($r,$text) = @_;
1774: $text =~ s/\'/\\\'/g;
1775: $r->print
1776: ("<script>document.statusform.count.value = ' $text'</script>\n");
1777: $r->rflush();
1778: }
1779:
1780: sub update_status {
1781: my ($r,$text) = @_;
1782: $text =~ s/\'/\\\'/g;
1783: $r->print
1784: ("<script>document.statusform.status.value = ' $text'</script>\n");
1785: $r->rflush();
1786: }
1787:
1788: sub update_seconds {
1789: my ($r,$text) = @_;
1790: $text =~ s/\'/\\\'/g;
1791: $r->print
1792: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1793: $r->rflush();
1794: }
1795:
1796: ######################################################################
1797: ######################################################################
1798:
1799: =pod
1800:
1801: =item &revise_button()
1802:
1803: Inputs: None
1804:
1805: Returns: html string for a 'revise search' button.
1806:
1807: =cut
1808:
1809: ######################################################################
1810: ######################################################################
1811: sub revise_button {
1812: my $revise_phase = 'disp_basic';
1813: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1814: my $newloc = '/adm/searchcat'.
1815: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1816: '&cleargroupsort=1'.
1817: '&phase='.$revise_phase;
1818: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1819: qq{ onClick="parent.location='$newloc';" /> };
1820: return $result;
1821: }
1822:
1823: ######################################################################
1824: ######################################################################
1825:
1826: =pod
1827:
1828: =item &run_search()
1829:
1830: Executes a search query by sending it the the other servers and putting the
1831: results into MySQL.
1832:
1833: =cut
1834:
1835: ######################################################################
1836: ######################################################################
1837: sub run_search {
1838: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1839: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1840: my $connection = $r->connection;
1841: #
1842: # Timing variables
1843: #
1844: my $starttime = time;
1845: my $max_time = 30; # seconds for the search to complete
1846: #
1847: # Print run_search header
1848: #
1849: $r->print(<<END);
1850: <html>
1851: <head><title>Search Status</title></head>
1852: $bodytag
1853: <form name="statusform" action="" method="post">
1854: <input type="hidden" name="Queue" value="" />
1855: END
1856: # Check to see if $pretty_string has more than one carriage return.
1857: # Assume \n s are following <br /> s and truncate the value.
1858: # (there is probably a better way)...
1859: my @Lines = split /<br \/>/,$pretty_string;
1860: if (@Lines > 2) {
1861: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1862: }
1863: $r->print(&mt("Search").": ".$pretty_string);
1864: $r->rflush();
1865: #
1866: # Determine the servers we need to contact.
1867: my @Servers_to_contact;
1868: if (defined($serverlist)) {
1869: if (ref($serverlist) eq 'ARRAY') {
1870: @Servers_to_contact = @$serverlist;
1871: } else {
1872: @Servers_to_contact = ($serverlist);
1873: }
1874: } else {
1875: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1876: }
1877: my %Server_status;
1878: my $table =$ENV{'form.table'};
1879: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1880: $r->print("Unable to determine table id to store search results in.".
1881: "The search has been aborted.</body></html>");
1882: return;
1883: }
1884: my $table_status = &Apache::lonmysql::check_table($table);
1885: if (! defined($table_status)) {
1886: $r->print("Unable to determine status of table.</body></html>");
1887: &Apache::lonnet::logthis("Bogus table id of $table for ".
1888: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1889: &Apache::lonnet::logthis("lonmysql error = ".
1890: &Apache::lonmysql::get_error());
1891: return;
1892: }
1893: if (! $table_status) {
1894: &Apache::lonnet::logthis("lonmysql error = ".
1895: &Apache::lonmysql::get_error());
1896: &Apache::lonnet::logthis("lonmysql debug = ".
1897: &Apache::lonmysql::get_debug());
1898: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
1899: $r->print("The table id,$table, we tried to use is invalid.".
1900: "The search has been aborted.</body></html>");
1901: return;
1902: }
1903: ##
1904: ## Prepare for the big loop.
1905: my $hitcountsum;
1906: my $server;
1907: my $status;
1908: my $revise = &revise_button();
1909: $r->print(<<END);
1910: <table>
1911: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1912: <tr>
1913: <td><input type="text" name="status" value="" size="30" /></td>
1914: <td><input type="text" name="count" value="" size="10" /></td>
1915: <td><input type="text" name="seconds" value="" size="8" /></td>
1916: <td>$revise</td>
1917: </tr>
1918: </table>
1919: </form>
1920: END
1921: $r->rflush();
1922: my $time_remaining = $max_time - (time - $starttime) ;
1923: $time_remaining = 0 if ($time_remaining <0);
1924: my $last_time = $time_remaining;
1925: &update_seconds($r,$time_remaining);
1926: &update_status($r,'contacting '.$Servers_to_contact[0]);
1927: while (($time_remaining > 0) &&
1928: ((@Servers_to_contact) || keys(%Server_status))) {
1929: &update_seconds($r,$time_remaining);
1930: # Send out a search request if it needs to be done.
1931: if (@Servers_to_contact) {
1932: # Contact one server
1933: my $server = shift(@Servers_to_contact);
1934: &update_status($r,&mt('contacting').' '.$server);
1935: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1936: $customshow,[$server]);
1937: ($server) = keys(%$reply);
1938: $Server_status{$server} = $reply->{$server};
1939: } else {
1940: # wait a sec. to give time for files to be written
1941: # This sleep statement is here instead of outside the else
1942: # block because we do not want to pause if we have servers
1943: # left to contact.
1944: if (scalar (keys(%Server_status))) {
1945: &update_status($r,
1946: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1947: }
1948: sleep(1);
1949: }
1950: #
1951: # Loop through the servers we have contacted but do not
1952: # have results from yet, looking for results.
1953: while (my ($server,$status) = each(%Server_status)) {
1954: last if ($connection->aborted());
1955: $time_remaining = $max_time - (time - $starttime) ;
1956: $time_remaining = 0 if ($time_remaining < 0);
1957: if ($last_time - $time_remaining > 0) {
1958: $last_time = $time_remaining;
1959: &update_seconds($r,$time_remaining);
1960: }
1961: if ($status eq 'con_lost') {
1962: delete ($Server_status{$server});
1963: next;
1964: }
1965: $status=~/^([\.\w]+)$/;
1966: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1967: if (-e $datafile && ! -e "$datafile.end") {
1968: &update_status($r,&mt('Receiving results from').' '.$server);
1969: next;
1970: }
1971: last if ($connection->aborted());
1972: if (-e "$datafile.end") {
1973: &update_status($r,&mt('Reading results from').' '.$server);
1974: if (-z "$datafile") {
1975: delete($Server_status{$server});
1976: next;
1977: }
1978: my $fh;
1979: if (!($fh=Apache::File->new($datafile))) {
1980: $r->print("Unable to open search results file for ".
1981: "server $server. Omitting from search");
1982: delete($Server_status{$server});
1983: next;
1984: }
1985: # Read in the whole file.
1986: while (my $result = <$fh>) {
1987: last if ($connection->aborted());
1988: # handle custom fields? Someday we will!
1989: chomp($result);
1990: next unless $result;
1991: # Parse the result.
1992: my %Fields = &parse_raw_result($result,$server);
1993: $Fields{'hostname'} = $server;
1994: next if (! ©right_check(\%Fields));
1995: # Store the result in the mysql database
1996: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1997: if (! defined($result)) {
1998: $r->print(&Apache::lonmysql::get_error());
1999: }
2000: # $r->print(&Apache::lonmysql::get_debug());
2001: $hitcountsum ++;
2002: $time_remaining = $max_time - (time - $starttime) ;
2003: $time_remaining = 0 if ($time_remaining < 0);
2004: if ($last_time - $time_remaining > 0) {
2005: &update_seconds($r,$time_remaining);
2006: $last_time = $time_remaining;
2007: }
2008: if ($hitcountsum % 50 == 0) {
2009: &update_count_status($r,$hitcountsum);
2010: }
2011: } # End of foreach (@results)
2012: $fh->close();
2013: # $server is only deleted if the results file has been
2014: # found and (successfully) opened. This may be a bad idea.
2015: delete($Server_status{$server});
2016: }
2017: last if ($connection->aborted());
2018: &update_count_status($r,$hitcountsum);
2019: }
2020: last if ($connection->aborted());
2021: # Finished looping through the servers
2022: $starttime = time if (@Servers_to_contact);
2023: $time_remaining = $max_time - (time - $starttime) ;
2024: if ($last_time - $time_remaining > 0) {
2025: $last_time = $time_remaining;
2026: &update_seconds($r,$time_remaining);
2027: }
2028: }
2029: &update_status($r,&mt('Search Complete').$server);
2030: &update_seconds($r,0);
2031: #
2032: &Apache::lonmysql::disconnect_from_db();
2033: #
2034: # We have run out of time or run out of servers to talk to and
2035: # results to get.
2036: $r->print("</body></html>");
2037: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2038: $r->print("<script>".
2039: "window.location='/adm/searchcat?".
2040: "phase=sort&".
2041: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2042: "</script>");
2043: }
2044: return;
2045: }
2046:
2047: ######################################################################
2048: ######################################################################
2049:
2050: =pod
2051:
2052: =item &prev_next_buttons()
2053:
2054: Returns html for the previous and next buttons on the search results page.
2055:
2056: =cut
2057:
2058: ######################################################################
2059: ######################################################################
2060: sub prev_next_buttons {
2061: my ($current_min,$show,$total,$parms) = @_;
2062: return '' if ($show eq 'all'); # No links if you get them all at once.
2063: my $links;
2064: ##
2065: ## Prev
2066: my $prev_min = $current_min - $show;
2067: $prev_min = 1 if $prev_min < 1;
2068: if ($prev_min < $current_min) {
2069: $links .=
2070: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
2071: &mt('prev').'</a>';
2072: } else {
2073: $links .= &mt('prev');
2074: }
2075: ##
2076: ## Pages.... Someday.
2077: ##
2078: $links .=
2079: qq{
2080: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
2081: &mt('reload').'</a>';
2082: ##
2083: ## Next
2084: my $next_min = $current_min + $show;
2085: $next_min = $current_min if ($next_min > $total);
2086: if ($next_min != $current_min) {
2087: $links .=
2088: qq{
2089: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
2090: &mt('next').'</a>';
2091: } else {
2092: $links .= ' '.&mt('next');
2093: }
2094: return $links;
2095: }
2096:
2097: ######################################################################
2098: ######################################################################
2099:
2100: =pod
2101:
2102: =item &display_results()
2103:
2104: Prints the results out for selection and perusal.
2105:
2106: =cut
2107:
2108: ######################################################################
2109: ######################################################################
2110: sub display_results {
2111: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2112: my $connection = $r->connection;
2113: $r->print(&search_results_header($importbutton,$closebutton));
2114: ##
2115: ## Set viewing function
2116: ##
2117: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2118: if (!defined($viewfunction)) {
2119: $r->print("Internal Error - Bad view selected.\n");
2120: $r->rflush();
2121: return;
2122: }
2123: ##
2124: ## $checkbox_num is a count of the number of checkboxes output on the
2125: ## page this is used only during catalogmode=groupsearch.
2126: my $checkbox_num = 0;
2127: ##
2128: ## Get the catalog controls setup
2129: ##
2130: my $action = "/adm/searchcat?phase=results";
2131: ##
2132: ## Deal with groupsearch by opening the groupsearch db file.
2133: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2134: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2135: &GDBM_WRCREAT(),0640)) {
2136: $r->print('Unable to store import results.</form></body></html>');
2137: $r->rflush();
2138: return;
2139: }
2140: }
2141: ##
2142: ## Prepare the table for querying
2143: my $table = $ENV{'form.table'};
2144: return if (! &ensure_db_and_table($r,$table));
2145: ##
2146: ## Get the number of results
2147: my $total_results = &Apache::lonmysql::number_of_rows($table);
2148: if (! defined($total_results)) {
2149: $r->print("A MySQL error has occurred.</form></body></html>");
2150: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2151: " of rows in table ".$table);
2152: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2153: return;
2154: }
2155: ##
2156: ## Determine how many results we need to get
2157: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2158: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2159: my $min = $ENV{'form.start'};
2160: my $max;
2161: if ($ENV{'form.show'} eq 'all') {
2162: $max = $total_results ;
2163: } else {
2164: $max = $min + $ENV{'form.show'} - 1;
2165: $max = $total_results if ($max > $total_results);
2166: }
2167: ##
2168: ## Output links (if necessary) for 'prev' and 'next' pages.
2169: $r->print
2170: ('<center>'.
2171: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2172: "table=".$ENV{'form.table'}.
2173: "&phase=results".
2174: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2175: ."</center>\n"
2176: );
2177: if ($total_results == 0) {
2178: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2179: '<h3>'.&mt('There are currently no results').'.</h3>'.
2180: "</form></body></html>");
2181: return;
2182: } else {
2183: $r->print
2184: ("<center>Results $min to $max out of $total_results</center>\n");
2185: }
2186: ##
2187: ## Get results from MySQL table
2188: my @Results = &Apache::lonmysql::get_rows($table,
2189: 'id>='.$min.' AND id<='.$max);
2190: ##
2191: ## Loop through the results and output them.
2192: foreach my $row (@Results) {
2193: if ($connection->aborted()) {
2194: &cleanup();
2195: return;
2196: }
2197: my %Fields = %{&parse_row(@$row)};
2198: my $output="<p>\n";
2199: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2200: $Fields{'title'} = 'Untitled';
2201: }
2202: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2203: $Fields{'id'},$checkbox_num++);
2204: # Render the result into html
2205: $output.= &$viewfunction($prefix,%Fields);
2206: # Print them out as they come in.
2207: $r->print($output);
2208: $r->rflush();
2209: }
2210: if (@Results < 1) {
2211: $r->print(&mt("There were no results matching your query"));
2212: } else {
2213: $r->print
2214: ('<center>'.
2215: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2216: "table=".$ENV{'form.table'}.
2217: "&phase=results".
2218: "&persistent_db_id=".
2219: $ENV{'form.persistent_db_id'})
2220: ."</center>\n"
2221: );
2222: }
2223: $r->print("</form></body></html>");
2224: $r->rflush();
2225: untie %groupsearch_db if (tied(%groupsearch_db));
2226: return;
2227: }
2228:
2229: ######################################################################
2230: ######################################################################
2231:
2232: =pod
2233:
2234: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2235:
2236: Returns html needed for the various catalog modes. Gets inputs from
2237: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2238:
2239: =cut
2240:
2241: ######################################################################
2242: ######################################################################
2243: sub catalogmode_output {
2244: my $output = '';
2245: my ($title,$url,$fnum,$checkbox_num) = @_;
2246: if ($ENV{'form.catalogmode'} eq 'interactive') {
2247: $title=~ s/\'/\\\'/g;
2248: if ($ENV{'form.catalogmode'} eq 'interactive') {
2249: $output.=<<END
2250: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2251: onClick="javascript:select_data('$title','$url')">
2252: </font>
2253: END
2254: }
2255: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2256: $groupsearch_db{"pre_${fnum}_link"}=$url;
2257: $groupsearch_db{"pre_${fnum}_title"}=$title;
2258: $output.=<<END;
2259: <font size='-1'>
2260: <input type="checkbox" name="returnvalues" value="SELECT"
2261: onClick="javascript:queue($checkbox_num,$fnum)" />
2262: </font>
2263: END
2264: }
2265: return $output;
2266: }
2267: ######################################################################
2268: ######################################################################
2269:
2270: =pod
2271:
2272: =item &parse_row()
2273:
2274: Parse a row returned from the database.
2275:
2276: =cut
2277:
2278: ######################################################################
2279: ######################################################################
2280: sub parse_row {
2281: my @Row = @_;
2282: my %Fields;
2283: if (! scalar(@Datatypes)) {
2284: &set_up_table_structure();
2285: }
2286: for (my $i=0;$i<=$#Row;$i++) {
2287: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2288: }
2289: $Fields{'language'} =
2290: &Apache::loncommon::languagedescription($Fields{'language'});
2291: $Fields{'copyrighttag'} =
2292: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2293: $Fields{'mimetag'} =
2294: &Apache::loncommon::filedescription($Fields{'mime'});
2295: return \%Fields;
2296: }
2297:
2298: ###########################################################
2299: ###########################################################
2300:
2301: =pod
2302:
2303: =item &parse_raw_result()
2304:
2305: Takes a line from the file of results and parse it. Returns a hash
2306: with keys according to column labels
2307:
2308: In addition, the following tags are set by calling the appropriate
2309: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2310:
2311: The 'title' field is set to "Untitled" if the title field is blank.
2312:
2313: 'abstract' and 'keywords' are truncated to 200 characters.
2314:
2315: =cut
2316:
2317: ###########################################################
2318: ###########################################################
2319: sub parse_raw_result {
2320: my ($result,$hostname) = @_;
2321: # conclude from self to others regarding fields
2322: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2323: (map {
2324: &Apache::lonnet::unescape($_);
2325: } (split(/\,/,$result)) );
2326: return %Fields;
2327: }
2328:
2329: ###########################################################
2330: ###########################################################
2331:
2332: =pod
2333:
2334: =item &handle_custom_fields()
2335:
2336: =cut
2337:
2338: ###########################################################
2339: ###########################################################
2340: sub handle_custom_fields {
2341: my @results = @{shift()};
2342: my $customshow='';
2343: my $extrashow='';
2344: my @customfields;
2345: if ($ENV{'form.customshow'}) {
2346: $customshow=$ENV{'form.customshow'};
2347: $customshow=~s/[^\w\s]//g;
2348: my @fields=map {
2349: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2350: } split(/\s+/,$customshow);
2351: @customfields=split(/\s+/,$customshow);
2352: if ($customshow) {
2353: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2354: }
2355: }
2356: my $customdata='';
2357: my %customhash;
2358: foreach my $result (@results) {
2359: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2360: my $tmp=$result;
2361: $tmp=~s/^custom\=//;
2362: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2363: } split(/\,/,$tmp);
2364: $customhash{$k}=$v;
2365: }
2366: }
2367: return ($extrashow,\@customfields,\%customhash);
2368: }
2369:
2370: ######################################################################
2371: ######################################################################
2372:
2373: =pod
2374:
2375: =item &search_results_header()
2376:
2377: Output the proper html headers and javascript code to deal with different
2378: calling modes.
2379:
2380: Takes most inputs directly from %ENV, except $mode.
2381:
2382: =over 4
2383:
2384: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2385:
2386: =back
2387:
2388: The following environment variables are checked:
2389:
2390: =over 4
2391:
2392: =item 'form.catalogmode'
2393:
2394: Checked for 'interactive' and 'groupsearch'.
2395:
2396: =item 'form.mode'
2397:
2398: Checked for existance & 'edit' mode.
2399:
2400: =item 'form.form'
2401:
2402: Contains the name of the form that has the input fields to set
2403:
2404: =item 'form.element'
2405:
2406: the name of the input field to put the URL into
2407:
2408: =item 'form.titleelement'
2409:
2410: the name of the input field to put the title into
2411:
2412: =back
2413:
2414: =cut
2415:
2416: ######################################################################
2417: ######################################################################
2418: sub search_results_header {
2419: my ($importbutton,$closebutton) = @_;
2420: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2421: my $result = '';
2422: # output beginning of search page
2423: # conditional output of script functions dependent on the mode in
2424: # which the search was invoked
2425: if ($ENV{'form.catalogmode'} eq 'interactive'){
2426: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2427: $result.=<<SCRIPT;
2428: <script type="text/javascript">
2429: function select_data(title,url) {
2430: changeTitle(title);
2431: changeURL(url);
2432: parent.close();
2433: }
2434: function changeTitle(val) {
2435: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2436: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2437: }
2438: }
2439: function changeURL(val) {
2440: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2441: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2442: }
2443: }
2444: </script>
2445: SCRIPT
2446: } elsif ($ENV{'form.mode'} eq 'edit') {
2447: my $form = $ENV{'form.form'};
2448: my $element = $ENV{'form.element'};
2449: my $titleelement = $ENV{'form.titleelement'};
2450: my $changetitle;
2451: if (!$titleelement) {
2452: $changetitle='function changeTitle(val) {}';
2453: } else {
2454: $changetitle=<<END;
2455: function changeTitle(val) {
2456: if (parent.targetwin.document) {
2457: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2458: } else {
2459: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2460: alert("Unable to transfer data to "+url);
2461: }
2462: }
2463: END
2464: }
2465:
2466: $result.=<<SCRIPT;
2467: <script type="text/javascript">
2468: function select_data(title,url) {
2469: changeURL(url);
2470: changeTitle(title);
2471: parent.close();
2472: }
2473: $changetitle
2474: function changeURL(val) {
2475: if (parent.targetwin.document) {
2476: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2477: } else {
2478: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2479: alert("Unable to transfer data to "+url);
2480: }
2481: }
2482: </script>
2483: SCRIPT
2484: }
2485: }
2486: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2487: <script type="text/javascript">
2488: function queue(checkbox_num,val) {
2489: if (document.forms.results.returnvalues.length != "undefined" &&
2490: typeof(document.forms.results.returnvalues.length) == "number") {
2491: if (document.forms.results.returnvalues[checkbox_num].checked) {
2492: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2493: } else {
2494: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2495: }
2496: } else {
2497: if (document.forms.results.returnvalues.checked) {
2498: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2499: } else {
2500: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2501: }
2502: }
2503: }
2504: function select_group() {
2505: parent.window.location=
2506: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2507: parent.statusframe.document.forms.statusform.elements.Queue.value;
2508: }
2509: </script>
2510: SCRIPT
2511: $result.=<<END;
2512: </head>
2513: $bodytag
2514: <form name="results" method="post" action="" >
2515: <input type="hidden" name="Queue" value="" />
2516: $importbutton
2517: END
2518: return $result;
2519: }
2520:
2521: ######################################################################
2522: ######################################################################
2523: sub search_status_header {
2524: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2525: return <<ENDSTATUS;
2526: <html><head><title>Search Status</title></head>
2527: $bodytag
2528: <h3>Search Status</h3>
2529: Sending search request to LON-CAPA servers.<br />
2530: ENDSTATUS
2531: }
2532:
2533: sub results_link {
2534: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2535: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2536: my $results_link = $basic_link."&phase=results".
2537: "&pause=1"."&start=1";
2538: return $results_link;
2539: }
2540:
2541: ######################################################################
2542: ######################################################################
2543: sub print_frames_interface {
2544: my $r = shift;
2545: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2546: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2547: my $run_search_link = $basic_link."&phase=run_search";
2548: my $results_link = &results_link();
2549: my $result = <<"ENDFRAMES";
2550: <html>
2551: <head>
2552: <script>
2553: var targetwin = opener;
2554: var queue = '';
2555: </script>
2556: <title>LON-CAPA Digital Library Search Results</title>
2557: </head>
2558: <frameset rows="150,*">
2559: <frame name="statusframe" src="$run_search_link">
2560: <frame name="resultsframe" src="$results_link">
2561: </frameset>
2562: </html>
2563: ENDFRAMES
2564:
2565: $r->print($result);
2566: return;
2567: }
2568:
2569: ######################################################################
2570: ######################################################################
2571:
2572: =pod
2573:
2574: =item Metadata Viewing Functions
2575:
2576: Output is a HTML-ified string.
2577:
2578: Input arguments are title, author, subject, url, keywords, version,
2579: notes, short abstract, mime, language, creation date,
2580: last revision date, owner, copyright, hostname, and
2581: extra custom metadata to show.
2582:
2583: =over 4
2584:
2585: =item &detailed_citation_view()
2586:
2587: =cut
2588:
2589: ######################################################################
2590: ######################################################################
2591: sub detailed_citation_view {
2592: my ($prefix,%values) = @_;
2593: my $icon=&Apache::loncommon::icon($values{'url'});
2594: my $result=<<END;
2595: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2596: target='search_preview'>$values{'title'}</a></b>
2597: <p>
2598: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2599:
2600: <b>Subject: </b> $values{'subject'}<br />
2601: <b>Keyword(s): </b> $values{'keywords'}<br />
2602: <b>Notes: </b> $values{'notes'}<br />
2603: <b>MIME Type: </b> $values{'mimetag'}<br />
2604: <b>Language: </b> $values{'language'}<br />
2605: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2606: </p>
2607: $values{'extrashow'}
2608: <p>
2609: $values{'shortabstract'}
2610: </p>
2611: <hr align='left' width='200' noshade />
2612: END
2613: return $result;
2614: }
2615:
2616: ######################################################################
2617: ######################################################################
2618:
2619: =pod
2620:
2621: =item &summary_view()
2622:
2623: =cut
2624: ######################################################################
2625: ######################################################################
2626: sub summary_view {
2627: my ($prefix,%values) = @_;
2628: my $icon=&Apache::loncommon::icon($values{'url'});
2629: my $result=<<END;
2630: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2631: target='search_preview'>$values{'author'}</a><br />
2632: $values{'title'}<br />
2633: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2634: $values{'copyrighttag'}<br />
2635: $values{'extrashow'}
2636: </p>
2637: <hr align='left' width='200' noshade />
2638: END
2639: return $result;
2640: }
2641:
2642: ######################################################################
2643: ######################################################################
2644:
2645: =pod
2646:
2647: =item &compact_view()
2648:
2649: =cut
2650:
2651: ######################################################################
2652: ######################################################################
2653: sub compact_view {
2654: my ($prefix,%values) = @_;
2655: my $icon=&Apache::loncommon::icon($values{'url'});
2656: my $result=<<END;
2657: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2658: $values{'title'}</a>
2659: <b>$values{'author'}</b><br />
2660: END
2661: return $result;
2662: }
2663:
2664:
2665: ######################################################################
2666: ######################################################################
2667:
2668: =pod
2669:
2670: =item &fielded_format_view()
2671:
2672: =cut
2673:
2674: ######################################################################
2675: ######################################################################
2676: sub fielded_format_view {
2677: my ($prefix,%values) = @_;
2678: my $icon=&Apache::loncommon::icon($values{'url'});
2679: my $result=<<END;
2680: $prefix <img src="$icon" />
2681: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2682: target='search_preview'>$values{'url'}</a>
2683: <br />
2684: <b>Title:</b> $values{'title'}<br />
2685: <b>Author(s):</b> $values{'author'}<br />
2686: <b>Subject:</b> $values{'subject'}<br />
2687: <b>Keyword(s):</b> $values{'keywords'}<br />
2688: <b>Notes:</b> $values{'notes'}<br />
2689: <b>MIME Type:</b> $values{'mimetag'}<br />
2690: <b>Language:</b> $values{'language'}<br />
2691: <b>Creation Date:</b> $values{'creationdate'}<br />
2692: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2693: <b>Publisher/Owner:</b> $values{'owner'}<br />
2694: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2695: <b>Repository Location:</b> $values{'hostname'}<br />
2696: <b>Abstract:</b> $values{'shortabstract'}<br />
2697: $values{'extrashow'}
2698: </p>
2699: <hr align='left' width='200' noshade />
2700: END
2701: return $result;
2702: }
2703:
2704: ######################################################################
2705: ######################################################################
2706:
2707: =pod
2708:
2709: =item &xml_sgml_view()
2710:
2711: =back
2712:
2713: =cut
2714:
2715: ######################################################################
2716: ######################################################################
2717: sub xml_sgml_view {
2718: my ($prefix,%values) = @_;
2719: my $result=<<END;
2720: $prefix
2721: <pre>
2722: <LonCapaResource>
2723: <url>$values{'url'}</url>
2724: <title>$values{'title'}</title>
2725: <author>$values{'author'}</author>
2726: <subject>$values{'subject'}</subject>
2727: <keywords>$values{'keywords'}</keywords>
2728: <notes>$values{'notes'}</notes>
2729: <mimeInfo>
2730: <mime>$values{'mime'}</mime>
2731: <mimetag>$values{'mimetag'}</mimetag>
2732: </mimeInfo>
2733: <languageInfo>
2734: <language>$values{'language'}</language>
2735: <languagetag>$values{'languagetag'}</languagetag>
2736: </languageInfo>
2737: <creationdate>$values{'creationdate'}</creationdate>
2738: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2739: <owner>$values{'owner'}</owner>
2740: <copyrightInfo>
2741: <copyright>$values{'copyright'}</copyright>
2742: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2743: </copyrightInfo>
2744: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2745: <shortabstract>$values{'shortabstract'}</shortabstract>
2746: </LonCapaResource>
2747: </pre>
2748: $values{'extrashow'}
2749: <hr align='left' width='200' noshade />
2750: END
2751: return $result;
2752: }
2753:
2754: ######################################################################
2755: ######################################################################
2756:
2757: =pod
2758:
2759: =item &filled() see if field is filled.
2760:
2761: =cut
2762:
2763: ######################################################################
2764: ######################################################################
2765: sub filled {
2766: my ($field)=@_;
2767: if ($field=~/\S/ && $field ne 'any') {
2768: return 1;
2769: } else {
2770: return 0;
2771: }
2772: }
2773:
2774: ######################################################################
2775: ######################################################################
2776:
2777: =pod
2778:
2779: =item &output_blank_field_error()
2780:
2781: Output a complete page that indicates the user has not filled in enough
2782: information to do a search.
2783:
2784: Inputs: $r (Apache request handle), $closebutton, $parms.
2785:
2786: Returns: nothing
2787:
2788: $parms is extra information to include in the 'Revise search request' link.
2789:
2790: =cut
2791:
2792: ######################################################################
2793: ######################################################################
2794: sub output_blank_field_error {
2795: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2796: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2797: # make query information persistent to allow for subsequent revision
2798: $r->print(<<BEGINNING);
2799: <html>
2800: <head>
2801: <title>The LearningOnline Network with CAPA</title>
2802: BEGINNING
2803: $r->print(<<RESULTS);
2804: </head>
2805: $bodytag
2806: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2807: <h1>Search Catalog</h1>
2808: <form method="post" action="/adm/searchcat">
2809: $hidden_fields
2810: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2811: >Revise search request</a>
2812: $closebutton
2813: <hr />
2814: <h3>Unactionable search query.</h3>
2815: <p>
2816: You did not fill in enough information for the search to be started.
2817: You need to fill in relevant fields on the search page in order
2818: for a query to be processed.
2819: </p>
2820: </body>
2821: </html>
2822: RESULTS
2823: }
2824:
2825: ######################################################################
2826: ######################################################################
2827:
2828: =pod
2829:
2830: =item &output_date_error()
2831:
2832: Output a full html page with an error message.
2833:
2834: Inputs:
2835:
2836: $r, the request pointer.
2837: $message, the error message for the user.
2838: $closebutton, the specialized close button needed for groupsearch.
2839:
2840: =cut
2841:
2842: ######################################################################
2843: ######################################################################
2844: sub output_date_error {
2845: my ($r,$message,$closebutton,$hidden_fields)=@_;
2846: # make query information persistent to allow for subsequent revision
2847: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2848: $r->print(<<RESULTS);
2849: <html>
2850: <head>
2851: <title>The LearningOnline Network with CAPA</title>
2852: </head>
2853: $bodytag
2854: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2855: <h1>Search Catalog</h1>
2856: <form method="post" action="/adm/searchcat">
2857: $hidden_fields
2858: <input type='button' value='Revise search request'
2859: onClick='this.form.submit();' />
2860: $closebutton
2861: <hr />
2862: <h3>Error</h3>
2863: <p>
2864: $message
2865: </p>
2866: </body>
2867: </html>
2868: RESULTS
2869: }
2870:
2871: ######################################################################
2872: ######################################################################
2873:
2874: =pod
2875:
2876: =item &start_fresh_session()
2877:
2878: Cleans the global %groupsearch_db by removing all fields which begin with
2879: 'pre_' or 'store'.
2880:
2881: =cut
2882:
2883: ######################################################################
2884: ######################################################################
2885: sub start_fresh_session {
2886: delete $groupsearch_db{'mode_catalog'};
2887: foreach (keys %groupsearch_db) {
2888: if ($_ =~ /^pre_/) {
2889: delete $groupsearch_db{$_};
2890: }
2891: if ($_ =~ /^store/) {
2892: delete $groupsearch_db{$_};
2893: }
2894: }
2895: }
2896:
2897: 1;
2898:
2899: sub cleanup {
2900: if (tied(%groupsearch_db)) {
2901: unless (untie(%groupsearch_db)) {
2902: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2903: }
2904: }
2905: &untiehash();
2906: &Apache::lonmysql::disconnect_from_db();
2907: }
2908:
2909: __END__
2910:
2911: =pod
2912:
2913: =back
2914:
2915: =cut
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