1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.201 2004/01/02 16:34:03 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a seperate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76:
77: ######################################################################
78: ######################################################################
79: ##
80: ## Global variables
81: ##
82: ######################################################################
83: ######################################################################
84: my %groupsearch_db; # Database hash used to save values for the
85: # groupsearch RAT interface.
86: my %persistent_db; # gdbm hash which holds data which is supposed to
87: # persist across calls to lonsearchcat.pm
88:
89: # The different view modes and associated functions
90:
91: my %Views = ("detailed" => \&detailed_citation_view,
92: "summary" => \&summary_view,
93: "fielded" => \&fielded_format_view,
94: "xml" => \&xml_sgml_view,
95: "compact" => \&compact_view);
96:
97: ######################################################################
98: ######################################################################
99: sub handler {
100: my $r = shift;
101: # &set_defaults();
102: #
103: # set form defaults
104: #
105: my $hidden_fields;# Hold all the hidden fields used to keep track
106: # of the search system state
107: my $importbutton; # button to take the selected results and go to group
108: # sorting
109: my $diropendb; # The full path to the (temporary) search database file.
110: # This is set and used in &handler() and is also used in
111: # &output_results().
112: my $bodytag; # LON-CAPA standard body tag, gotten from
113: # &Apache::lonnet::bodytag.
114: # No title, no table, just a <body> tag.
115:
116: my $loaderror=&Apache::lonnet::overloaderror($r);
117: if ($loaderror) { return $loaderror; }
118:
119: my $closebutton; # button that closes the search window
120: # This button is different for the RAT compared to
121: # normal invocation.
122: #
123: &Apache::loncommon::content_type($r,'text/html');
124: $r->send_http_header;
125: return OK if $r->header_only;
126: ##
127: ## Prevent caching of the search interface window. Hopefully this means
128: ## we will get the launch=1 passed in a little more.
129: &Apache::loncommon::no_cache($r);
130: ##
131: ## Pick up form fields passed in the links.
132: ##
133: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
134: ['catalogmode','launch','acts','mode','form','element','pause',
135: 'phase','persistent_db_id','table','start','show',
136: 'cleargroupsort','titleelement']);
137: ##
138: ## The following is a trick - we wait a few seconds if asked to so
139: ## the daemon running the search can get ahead of the daemon
140: ## printing the results. We only need (theoretically) to do
141: ## this once, so the pause indicator is deleted
142: ##
143: if (exists($ENV{'form.pause'})) {
144: sleep(1);
145: delete($ENV{'form.pause'});
146: }
147: ##
148: ## Initialize global variables
149: ##
150: my $domain = $r->dir_config('lonDefDomain');
151: $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
152: #
153: # set the name of the persistent database
154: # $ENV{'form.persistent_db_id'} can only have digits in it.
155: if (! exists($ENV{'form.persistent_db_id'}) ||
156: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
157: ($ENV{'form.launch'} eq '1')) {
158: $ENV{'form.persistent_db_id'} = time;
159: }
160: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
161: my $persistent_db_file = "/home/httpd/perl/tmp/".
162: &Apache::lonnet::escape($domain).
163: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
164: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
165: ##
166: if (! &get_persistent_form_data($persistent_db_file)) {
167: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
168: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
169: "from $persistent_db_file");
170: $r->print(<<END);
171: <html>
172: <head><title>LON-CAPA Search Error</title></head>
173: $bodytag
174: We were unable to retrieve data describing your search. This is a serious
175: error and has been logged. Please alert your LON-CAPA administrator.
176: </body>
177: </html>
178: END
179: return OK;
180: }
181: }
182: ##
183: ## Clear out old values from groupsearch database
184: ##
185: untie %groupsearch_db if (tied(%groupsearch_db));
186: if (($ENV{'form.cleargroupsort'} eq '1') ||
187: (($ENV{'form.launch'} eq '1') &&
188: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
189: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
190: &start_fresh_session();
191: untie %groupsearch_db;
192: delete($ENV{'form.cleargroupsort'});
193: } else {
194: # This is a stupid error to give to the user.
195: # It really tells them nothing.
196: $r->print('<html><head></head>'.$bodytag.
197: 'Unable to tie hash to db file</body></html>');
198: return OK;
199: }
200: }
201: ##
202: ## Configure hidden fields
203: ##
204: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
205: $ENV{'form.persistent_db_id'}.'" />'."\n";
206: if (exists($ENV{'form.catalogmode'})) {
207: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
208: $ENV{'form.catalogmode'}.'" />'."\n";
209: }
210: if (exists($ENV{'form.form'})) {
211: $hidden_fields .= '<input type="hidden" name="form" value="'.
212: $ENV{'form.form'}.'" />'."\n";
213: }
214: if (exists($ENV{'form.element'})) {
215: $hidden_fields .= '<input type="hidden" name="element" value="'.
216: $ENV{'form.element'}.'" />'."\n";
217: }
218: if (exists($ENV{'form.titleelement'})) {
219: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
220: $ENV{'form.titleelement'}.'" />'."\n";
221: }
222: if (exists($ENV{'form.mode'})) {
223: $hidden_fields .= '<input type="hidden" name="mode" value="'.
224: $ENV{'form.mode'}.'" />'."\n";
225: }
226: ##
227: ## Configure dynamic components of interface
228: ##
229: if ($ENV{'form.catalogmode'} eq 'interactive') {
230: $closebutton="<input type='button' name='close' value='CLOSE' ";
231: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
232: $closebutton .="onClick='parent.close()'";
233: } else {
234: $closebutton .="onClick='self.close()'";
235: }
236: $closebutton .=">\n";
237: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
238: $closebutton="<input type='button' name='close' value='CLOSE' ";
239: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
240: $closebutton .="onClick='parent.close()'";
241: } else {
242: $closebutton .="onClick='self.close()'";
243: }
244: $closebutton .= ">";
245: $importbutton=<<END;
246: <input type='button' name='import' value='IMPORT'
247: onClick='javascript:select_group()'>
248: END
249: } else {
250: $closebutton = '';
251: $importbutton = '';
252: }
253: ##
254: ## Sanity checks on form elements
255: ##
256: if (!defined($ENV{'form.viewselect'})) {
257: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
258: ($ENV{'form.catalogmode'} eq 'interactive')) {
259: $ENV{'form.viewselect'} ="Compact View";
260: } else {
261: $ENV{'form.viewselect'} ="Detailed Citation View";
262: }
263: }
264: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
265: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
266: ##
267: ## Switch on the phase
268: ##
269: if ($ENV{'form.phase'} eq 'disp_basic') {
270: &print_basic_search_form($r,$closebutton,$hidden_fields);
271: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
272: &print_advanced_search_form($r,$closebutton,$hidden_fields);
273: } elsif ($ENV{'form.phase'} eq 'results') {
274: &display_results($r,$importbutton,$closebutton,$diropendb);
275: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
276: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
277: &get_persistent_data($persistent_db_file,
278: ['query','customquery','customshow',
279: 'libraries','pretty_string']);
280: if ($ENV{'form.phase'} eq 'sort') {
281: &print_sort_form($r,$pretty_string);
282: } elsif ($ENV{'form.phase'} eq 'run_search') {
283: &run_search($r,$query,$customquery,$customshow,
284: $libraries,$pretty_string);
285: }
286: } elsif ($ENV{'form.phase'} eq 'course_search') {
287: &course_search($r);
288: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
289: ($ENV{'form.phase'} eq 'adv_search')) {
290: $ENV{'form.searchmode'} = 'basic';
291: if ($ENV{'form.phase'} eq 'adv_search') {
292: $ENV{'form.searchmode'} = 'advanced';
293: }
294: # Set up table
295: if (! defined(&create_results_table())) {
296: my $errorstring=&Apache::lonmysql::get_error();
297: $r->print(<<END);
298: <html><head><title>Search Error</title></head>
299: $bodytag
300: Unable to create table in which to store search results.
301: The search has been aborted.
302: <br />$errorstring
303: </body>
304: </html>
305: END
306: return OK;
307: }
308: delete($ENV{'form.launch'});
309: if (! &make_form_data_persistent($r,$persistent_db_file)) {
310: $r->print(<<END);
311: <html><head><title>Search Error</title></head>
312: $bodytag
313: Unable to properly store search information. The search has been aborted.
314: </body>
315: </html>
316: END
317: return OK;
318: }
319: #
320: # We are running a search
321: my ($query,$customquery,$customshow,$libraries) =
322: (undef,undef,undef,undef);
323: my $pretty_string;
324: if ($ENV{'form.phase'} eq 'basic_search') {
325: ($query,$pretty_string,$libraries) =
326: &parse_basic_search($r,$closebutton,$hidden_fields);
327: } else { # Advanced search
328: ($query,$customquery,$customshow,$libraries,$pretty_string)
329: = &parse_advanced_search($r,$closebutton,$hidden_fields);
330: return OK if (! defined($query));
331: }
332: &make_persistent({ query => $query,
333: customquery => $customquery,
334: customshow => $customshow,
335: libraries => $libraries,
336: pretty_string => $pretty_string },
337: $persistent_db_file);
338: ##
339: ## Print out the frames interface
340: ##
341: &print_frames_interface($r);
342: }
343: return OK;
344: }
345:
346: ######################################################################
347: ######################################################################
348: ##
349: ## Course Search
350: ##
351: ######################################################################
352: ######################################################################
353: { # Scope the course search to avoid global variables
354: #
355: # Variables For course search
356: my %alreadyseen;
357: my %hash;
358: my $totalfound;
359:
360: sub course_search {
361: my $r=shift;
362: my $bodytag=&Apache::loncommon::bodytag('Course Search');
363: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
364: my $search_string = $ENV{'form.courseexp'};
365: my @New_Words;
366: if ($ENV{'form.crsrelated'}) {
367: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
368: if (@New_Words) {
369: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
370: } else {
371: $pretty_search_string .= ' '.&mt('with no related words').".";
372: }
373: }
374: my $fulltext=$ENV{'form.crsfulltext'};
375: my @allwords=($search_string,@New_Words);
376: $totalfound=0;
377: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
378: $bodytag.$pretty_search_string);
379: $r->rflush();
380: # ======================================================= Go through the course
381: undef %alreadyseen;
382: %alreadyseen=();
383: my $c=$r->connection;
384: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
385: &GDBM_READER(),0640)) {
386: foreach (keys %hash) {
387: if ($c->aborted()) { last; }
388: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
389: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
390: @allwords);
391: }
392: }
393: untie(%hash);
394: }
395: unless ($totalfound) {
396: $r->print('<p>'.&mt('No resources found').'.</p>');
397: }
398: # =================================================== Done going through course
399: $r->print('</body></html>');
400: }
401:
402: # =============================== This pulls up a resource and its dependencies
403:
404: sub checkonthis {
405: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
406: $alreadyseen{$url}=1;
407: $r->rflush();
408: my $result=&Apache::lonnet::metadata($url,'title').' '.
409: &Apache::lonnet::metadata($url,'subject').' '.
410: &Apache::lonnet::metadata($url,'abstract').' '.
411: &Apache::lonnet::metadata($url,'keywords');
412: if (($url) && ($fulltext)) {
413: $result.=&Apache::lonnet::ssi_body($url);
414: }
415: $result=~s/\s+/ /gs;
416: my $applies=0;
417: foreach (@allwords) {
418: if ($_=~/\w/) {
419: if ($result=~/$_/si) {
420: $applies++;
421: }
422: }
423: }
424: # Does this resource apply?
425: if ($applies) {
426: $r->print('<br />');
427: for (my $i=0;$i<=$level*5;$i++) {
428: $r->print(' ');
429: }
430: $r->print('<a href="'.$url.'" target="cat">'.
431: ($title?$title:$url).'</a><br />');
432: $totalfound++;
433: } elsif ($fulltext) {
434: $r->print(' .');
435: }
436: $r->rflush();
437: # Check also the dependencies of this one
438: my $dependencies=
439: &Apache::lonnet::metadata($url,'dependencies');
440: foreach (split(/\,/,$dependencies)) {
441: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
442: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
443: }
444: }
445: }
446:
447: sub untiehash {
448: if (tied(%hash)) {
449: untie(%hash);
450: }
451: }
452:
453: } # End of course search scoping
454:
455: ######################################################################
456: ######################################################################
457:
458: =pod
459:
460: =item &print_basic_search_form()
461:
462: Returns a scalar which holds html for the basic search form.
463:
464: =cut
465:
466: ######################################################################
467: ######################################################################
468:
469: sub print_basic_search_form{
470: my ($r,$closebutton,$hidden_fields) = @_;
471: my $bodytag=&Apache::loncommon::bodytag('Search');
472: my $scrout=<<"ENDDOCUMENT";
473: <html>
474: <head>
475: <title>The LearningOnline Network with CAPA</title>
476: <script type="text/javascript">
477: function openhelp(val) {
478: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
479: 'scrollbars=1,width=600,height=300');
480: openhelpwin.focus();
481: }
482: </script>
483: </head>
484: $bodytag
485: ENDDOCUMENT
486: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
487: my $CatalogSearch=&mt('Catalog Search');
488: my $Statement=&searchhelp();
489: $scrout.=(<<ENDDOCUMENT);
490: <h1>$CatalogSearch</h1>
491: <form name="loncapa_search" method="post" action="/adm/searchcat">
492: <input type="hidden" name="phase" value="basic_search" />
493: $hidden_fields
494: <p>
495: $Statement.
496: </p>
497: <p>
498: <table>
499: <tr><td>
500: ENDDOCUMENT
501: $scrout.=' '.&Apache::lonhtmlcommon::textbox('basicexp',
502: $ENV{'form.basicexp'},40).
503: ' ';
504: my $relatedcheckbox = &Apache::lonhtmlcommon::checkbox('related',
505: $ENV{'form.related'});
506: my $domain = $r->dir_config('lonDefDomain');
507: my $domaincheckbox = &Apache::lonhtmlcommon::checkbox('domains',
508: $ENV{'form.domains'});
509: my $srch=&mt('Search');
510: my $header=&mt('Advanced Search');
511: my $userelatedwords=&mt('use related words');
512: my $onlysearchdomain=&mt('only search domain');
513: my $view=&viewoptions();
514: $scrout.=<<END;
515: </td><td><a
516: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
517: >$header</a></td></tr>
518: <tr><td>$relatedcheckbox $userelatedwords</td>
519: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
520: </table>
521: </p>
522: $view
523: <p>
524: <input type="submit" name="basicsubmit" value='$srch' />
525: $closebutton
526: END
527: $scrout.=<<ENDDOCUMENT;
528: </p>
529: </form>
530: ENDDOCUMENT
531: }
532: if ($ENV{'request.course.id'}) {
533: my %lt=&Apache::lonlocal::texthash(
534: 'srch' => 'Search',
535: 'header' => 'Course Search',
536: 'note' => 'Enter terms or phrases, then press "Search" below',
537: 'use' => 'use related words',
538: 'full' =>'fulltext search (time consuming)'
539: );
540: $scrout.=(<<ENDCOURSESEARCH);
541: <hr />
542: <h1>$lt{'header'}</h1>
543: <form name="course_search" method="post" action="/adm/searchcat">
544: <input type="hidden" name="phase" value="course_search" />
545: $hidden_fields
546: <p>
547: $lt{'note'}.
548: </p>
549: <p>
550: <table>
551: <tr><td>
552: ENDCOURSESEARCH
553: $scrout.=' '.
554: &Apache::lonhtmlcommon::textbox('courseexp',
555: $ENV{'form.courseexp'},40);
556: my $crscheckbox =
557: &Apache::lonhtmlcommon::checkbox('crsfulltext',
558: $ENV{'form.crsfulltext'});
559: my $relcheckbox =
560: &Apache::lonhtmlcommon::checkbox('crsrelated',
561: $ENV{'form.crsrelated'});
562: $scrout.=(<<ENDENDCOURSE);
563: </td></tr>
564: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
565: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
566: </table><p>
567: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
568: </p>
569: ENDENDCOURSE
570: }
571: $scrout.=(<<ENDDOCUMENT);
572: </body>
573: </html>
574: ENDDOCUMENT
575: $r->print($scrout);
576: return;
577: }
578: ######################################################################
579: ######################################################################
580:
581: =pod
582:
583: =item &advanced_search_form()
584:
585: Returns a scalar which holds html for the advanced search form.
586:
587: =cut
588:
589: ######################################################################
590: ######################################################################
591:
592: sub print_advanced_search_form{
593: my ($r,$closebutton,$hidden_fields) = @_;
594: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
595: 'reset' => 'Reset',
596: 'help' => 'Help');
597: my $advanced_buttons = <<"END";
598: <p>
599: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
600: <input type="reset" name="reset" value='$lt{"reset"}' />
601: $closebutton
602: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
603: </p>
604: END
605: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
606: my $searchhelp=&searchhelp();
607: my $scrout=<<"ENDHEADER";
608: <html>
609: <head>
610: <title>The LearningOnline Network with CAPA</title>
611: <script type="text/javascript">
612: function openhelp(val) {
613: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
614: 'scrollbars=1,width=600,height=300');
615: openhelpwin.focus();
616: }
617: </script>
618: </head>
619: $bodytag
620: $searchhelp
621: <form method="post" action="/adm/searchcat" name="advsearch">
622: $advanced_buttons
623: $hidden_fields
624: <input type="hidden" name="phase" value="adv_search" />
625: ENDHEADER
626: $scrout.=&viewoptions();
627: my %fields=&Apache::lonmeta::fieldnames();
628:
629: $scrout.='<table>';
630: $scrout.="<tr><th>".&mt('Field').'</th><th>'.&mt('Value').'</th><th>'
631: .&mt('Related').'<br />'.&mt('Words')."</td></tr>\n";
632: foreach ('title','author','keywords','notes','abstract','standards',
633: 'lowestgradelevel','highestgradelevel','mime') {
634: $scrout.='<tr bgcolor="#FFFFBB"><td>'.&titlefield($fields{$_}).'</td><td>'.
635: &Apache::lonmeta::prettyinput($_,$ENV{'form.'.$_},$_,'advsearch',
636: 1,'</td><td>',$ENV{'form.'.$_.'_related'}).
637: '</td></tr>';
638: }
639: my %dates=&Apache::lonlocal::texthash('creationdatestart' => 'Creation Date After',
640: 'creationdateend' => 'Creation Date Before',
641: 'lastrevisiondatestart' => 'Last Revision Date After',
642: 'lastrevisiondateend' => 'Last Revision Date Before');
643: foreach (sort keys %dates) {
644: $scrout.='<tr><td>'.&titlefield($dates{$_}).'</td><td>'.
645: &Apache::lonhtmlcommon::date_setter('advsearch',$_,0,'',1).
646: '</td><td> </td></td></tr>';
647: }
648:
649:
650:
651: # Hack - an empty table row.
652: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
653: # $scrout.=&searchphrasefield('file<br />extension','extension',
654: # $ENV{'form.extension'});
655: # $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
656: # $scrout.=&searchphrasefield('publisher<br />owner','owner',
657: # $ENV{'form.owner'});
658: $scrout.="</table>\n";
659: # $scrout.=&Apache::lonmeta::selectbox('File Category','category',
660: # $ENV{'form.category'},
661: # 'any','Any category',
662: # undef,
663: # (&Apache::loncommon::filecategories()));
664: #----------------------------------------------------------------
665: # Allow restriction to multiple domains.
666: # I make the crazy assumption that there will never be a domain 'any'.
667: #
668: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
669: : ($ENV{'form.domains'}) );
670: my %domain_hash = ();
671: foreach (@allowed_domains) {
672: $domain_hash{$_}++;
673: }
674: my @domains =&Apache::loncommon::get_domains();
675: # adjust the size of the select box
676: my $size = 4;
677: $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
678: $scrout.="\n".&titlefield(&mt('Domain to be searched')).
679: '<select name="domains" size="'.$size.'" multiple>'."\n".
680: '<option name="any" value="any" '.
681: ($domain_hash{'any'}? 'selected ' :'').
682: '>all domains</option>'."\n";
683: foreach my $dom (sort @domains) {
684: $scrout.="<option name=\"$dom\" ".
685: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
686: }
687: $scrout.="</select>\n";
688:
689: # ------------------------------------------- Compute customized metadata field
690: # $scrout.=<<CUSTOMMETADATA;
691: #<p>
692: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
693: #</font>
694: #For resource-specific metadata, enter in an expression in the form of
695: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
696: #<b>Example:</b> grandmother=75 OR grandfather=85
697: #<br />
698: #CUSTOMMETADATA
699: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
700: # $scrout.=<<CUSTOMSHOW;
701: #<p>
702: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
703: #</font>
704: #Enter in a space-separated list of special metadata fields to show
705: #in a fielded listing for each record result.
706: #<br />
707: #CUSTOMSHOW
708: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
709: $scrout.=<<ENDDOCUMENT;
710: $advanced_buttons
711: </form>
712: </body>
713: </html>
714: ENDDOCUMENT
715: $r->print($scrout);
716: return;
717: }
718: ######################################################################
719: ######################################################################
720:
721: =pod
722:
723: =item &titlefield
724:
725: Inputs: title text
726:
727: Outputs: titletext with font wrapper
728:
729: =cut
730:
731: ######################################################################
732: ######################################################################
733:
734: sub titlefield {
735: my $title=shift;
736: return '<font face="arial" color="#800000">'.$title.'</font>';
737: }
738: ######################################################################
739: ######################################################################
740:
741: =pod
742:
743: =item viewoptiontext
744:
745: Inputs: codename for view option
746:
747: Outputs: displayed text
748:
749: =cut
750:
751: ######################################################################
752: ######################################################################
753:
754: sub viewoptiontext {
755: my $code=shift;
756: my %desc=&Apache::lonlocal::texthash('detailed' => "Detailed Citation View",
757: 'xml' => 'XML/SGML',
758: 'compact' => 'Compact View',
759: 'fielded' => 'Fielded Format',
760: 'summary' => 'Summary View');
761: return $desc{$code};
762: }
763: ######################################################################
764:
765: =pod
766:
767: =item viewoptions
768:
769: Inputs: none
770:
771: Outputs: text for box with view options
772:
773: =cut
774:
775: ######################################################################
776: ######################################################################
777:
778: sub viewoptions {
779: my $scrout="\n\n".'<table bgcolor="#FFFFBB"><tr><th>'.&mt('View Options').'</th><th>'.
780: &mt('Records per Page').'</th></tr><tr><td>';
781: unless ($ENV{'form.viewselect'}) { $ENV{'form.viewselect'}='detailed'; }
782: $scrout.=&Apache::lonmeta::selectbox('viewselect',
783: $ENV{'form.viewselect'},
784: \&viewoptiontext,
785: sort(keys(%Views)));
786: $scrout.='</td><td>';
787: $scrout.=&Apache::lonmeta::selectbox('show',
788: $ENV{'form.show'},
789: undef,
790: (10,20,50,100,1000,10000));
791: $scrout.="</td></tr></table>\n\n";
792: return $scrout;
793: }
794:
795: ######################################################################
796:
797: =pod
798:
799: =item searchhelp
800:
801: Inputs: none
802:
803: Outputs: return little blurb on how to enter searches
804:
805: =cut
806:
807: ######################################################################
808: ######################################################################
809:
810: sub searchhelp {
811: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
812: }
813:
814: ######################################################################
815: ######################################################################
816:
817: =pod
818:
819: =item &get_persistent_form_data
820:
821: Inputs: filename of database
822:
823: Outputs: returns undef on database errors.
824:
825: This function is the reverse of &make_persistent() for form data.
826: Retrieve persistent data from %persistent_db. Retrieved items will have their
827: values unescaped. If a form value already exists in $ENV, it will not be
828: overwritten. Form values that are array references may have values appended
829: to them.
830:
831: =cut
832:
833: ######################################################################
834: ######################################################################
835: sub get_persistent_form_data {
836: my $filename = shift;
837: return 0 if (! -e $filename);
838: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
839: &GDBM_READER(),0640));
840: #
841: # These make sure we do not get array references printed out as 'values'.
842: my %arrays_allowed = ('form.domains'=>1);
843: #
844: # Loop through the keys, looking for 'form.'
845: foreach my $name (keys(%persistent_db)) {
846: next if ($name !~ /^form./);
847: # Kludgification begins!
848: if ($name eq 'form.domains' &&
849: $ENV{'form.searchmode'} eq 'basic' &&
850: $ENV{'form.phase'} ne 'disp_basic') {
851: next;
852: }
853: # End kludge (hopefully)
854: next if (exists($ENV{$name}));
855: my @values = map {
856: &Apache::lonnet::unescape($_);
857: } split(',',$persistent_db{$name});
858: next if (@values <1);
859: if ($arrays_allowed{$name}) {
860: $ENV{$name} = [@values];
861: } else {
862: $ENV{$name} = $values[0] if ($values[0]);
863: }
864: }
865: untie (%persistent_db);
866: return 1;
867: }
868:
869: ######################################################################
870: ######################################################################
871:
872: =pod
873:
874: =item &get_persistent_data
875:
876: Inputs: filename of database, ref to array of values to recover.
877:
878: Outputs: array of values. Returns undef on error.
879:
880: This function is the reverse of &make_persistent();
881: Retrieve persistent data from %persistent_db. Retrieved items will have their
882: values unescaped. If the item contains commas (before unescaping), the
883: returned value will be an array pointer.
884:
885: =cut
886:
887: ######################################################################
888: ######################################################################
889: sub get_persistent_data {
890: my $filename = shift;
891: my @Vars = @{shift()};
892: my @Values; # Return array
893: return undef if (! -e $filename);
894: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
895: &GDBM_READER(),0640));
896: foreach my $name (@Vars) {
897: if (! exists($persistent_db{$name})) {
898: push @Values, undef;
899: next;
900: }
901: my @values = map {
902: &Apache::lonnet::unescape($_);
903: } split(',',$persistent_db{$name});
904: if (@values <= 1) {
905: push @Values,$values[0];
906: } else {
907: push @Values,\@values;
908: }
909: }
910: untie (%persistent_db);
911: return @Values;
912: }
913:
914: ######################################################################
915: ######################################################################
916:
917: =pod
918:
919: =item &make_persistent()
920:
921: Inputs: Hash of values to save, filename of persistent database.
922:
923: Store variables away to the %persistent_db.
924: Values will be escaped. Values that are array pointers will have their
925: elements escaped and concatenated in a comma seperated string.
926:
927: =cut
928:
929: ######################################################################
930: ######################################################################
931: sub make_persistent {
932: my %save = %{shift()};
933: my $filename = shift;
934: return undef if (! tie(%persistent_db,'GDBM_File',
935: $filename,&GDBM_WRCREAT(),0640));
936: foreach my $name (keys(%save)) {
937: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
938: # We handle array references, but not recursively.
939: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
940: $persistent_db{$name} = $store;
941: }
942: untie(%persistent_db);
943: return 1;
944: }
945:
946: ######################################################################
947: ######################################################################
948:
949: =pod
950:
951: =item &make_form_data_persistent()
952:
953: Inputs: filename of persistent database.
954:
955: Store most form variables away to the %persistent_db.
956: Values will be escaped. Values that are array pointers will have their
957: elements escaped and concatenated in a comma seperated string.
958:
959: =cut
960:
961: ######################################################################
962: ######################################################################
963: sub make_form_data_persistent {
964: my $r = shift;
965: my $filename = shift;
966: my %save;
967: foreach (keys(%ENV)) {
968: next if (!/^form/ || /submit/);
969: $save{$_} = $ENV{$_};
970: }
971: return &make_persistent(\%save,$filename);
972: }
973:
974: ######################################################################
975: ######################################################################
976:
977: =pod
978:
979: =item &parse_advanced_search()
980:
981: Parse advanced search form and return the following:
982:
983: =over 4
984:
985: =item $query Scalar containing an SQL query.
986:
987: =item $customquery Scalar containing a custom query.
988:
989: =item $customshow Scalar containing commands to show custom metadata.
990:
991: =item $libraries_to_query Reference to array of domains to search.
992:
993: =back
994:
995: =cut
996:
997: ######################################################################
998: ######################################################################
999: sub parse_advanced_search {
1000: my ($r,$closebutton,$hidden_fields)=@_;
1001: my $fillflag=0;
1002: my $pretty_search_string = "<br />\n";
1003: # Clean up fields for safety
1004: for my $field ('title','author','subject','keywords','url','version',
1005: 'creationdatestart_month','creationdatestart_day',
1006: 'creationdatestart_year','creationdateend_month',
1007: 'creationdateend_day','creationdateend_year',
1008: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1009: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1010: 'lastrevisiondateend_day','lastrevisiondateend_year',
1011: 'notes','abstract','extension','language','owner',
1012: 'custommetadata','customshow','category') {
1013: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1014: }
1015: foreach ('mode','form','element') {
1016: # is this required? Hmmm.
1017: next unless (exists($ENV{"form.$_"}));
1018: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1019: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1020: }
1021: # Preprocess the category form element.
1022: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1023: ref($ENV{'form.category'}));
1024: #
1025: # Check to see if enough information was filled in
1026: for my $field ('title','author','subject','keywords','url','version',
1027: 'notes','abstract','category','extension','language',
1028: 'owner','custommetadata') {
1029: if (&filled($ENV{"form.$field"})) {
1030: $fillflag++;
1031: }
1032: }
1033: unless ($fillflag) {
1034: &output_blank_field_error($r,$closebutton,'phase=disp_adv',$hidden_fields);
1035: return ;
1036: }
1037: # Turn the form input into a SQL-based query
1038: my $query='';
1039: my @queries;
1040: my $font = '<font color="#800000" face="helvetica">';
1041: # Evaluate logical expression AND/OR/NOT phrase fields.
1042: foreach my $field ('title','author','subject','notes','abstract','url',
1043: 'keywords','version','owner','standards') {
1044: if ($ENV{'form.'.$field}) {
1045: my $searchphrase = $ENV{'form.'.$field};
1046: $pretty_search_string .= $font."$field</font> contains <b>".
1047: $searchphrase."</b>";
1048: if ($ENV{'form.'.$field.'_related'}) {
1049: my @New_Words;
1050: ($searchphrase,@New_Words) = &related_version($searchphrase);
1051: if (@New_Words) {
1052: $pretty_search_string .= " with related words: ".
1053: "<b>@New_Words</b>.";
1054: } else {
1055: $pretty_search_string .= " with no related words.";
1056: }
1057: }
1058: $pretty_search_string .= "<br />\n";
1059: push @queries,&build_SQL_query($field,$searchphrase);
1060: }
1061: }
1062: #
1063: # Make the 'mime' from 'form.category' and 'form.extension'
1064: #
1065: my $searchphrase;
1066: if (exists($ENV{'form.category'}) &&
1067: $ENV{'form.category'} !~ /^\s*$/ &&
1068: $ENV{'form.category'} ne 'any') {
1069: my @extensions = &Apache::loncommon::filecategorytypes
1070: ($ENV{'form.category'});
1071: if (scalar(@extensions) > 0) {
1072: $searchphrase = join(' OR ',@extensions);
1073: }
1074: }
1075: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1076: $searchphrase .= ' OR ' if (defined($searchphrase));
1077: my @extensions = split(/,/,$ENV{'form.extension'});
1078: $searchphrase .= join(' OR ',@extensions);
1079: }
1080: if (defined($searchphrase)) {
1081: push @queries,&build_SQL_query('mime',$searchphrase);
1082: $pretty_search_string .=$font.'mime</font> contains <b>'.
1083: $searchphrase.'</b><br />';
1084: }
1085: #####
1086: # Evaluate option lists
1087: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1088: push @queries,"(language like \"$ENV{'form.language'}\")";
1089: $pretty_search_string.=$font."language</font>= ".
1090: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1091: "<br />\n";
1092: }
1093: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1094: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1095: $pretty_search_string.=$font."copyright</font> = ".
1096: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1097: "<br \>\n";
1098: }
1099: #
1100: # Evaluate date windows
1101: my $datequery=&build_date_queries(
1102: $ENV{'form.creationdatestart_month'},
1103: $ENV{'form.creationdatestart_day'},
1104: $ENV{'form.creationdatestart_year'},
1105: $ENV{'form.creationdateend_month'},
1106: $ENV{'form.creationdateend_day'},
1107: $ENV{'form.creationdateend_year'},
1108: $ENV{'form.lastrevisiondatestart_month'},
1109: $ENV{'form.lastrevisiondatestart_day'},
1110: $ENV{'form.lastrevisiondatestart_year'},
1111: $ENV{'form.lastrevisiondateend_month'},
1112: $ENV{'form.lastrevisiondateend_day'},
1113: $ENV{'form.lastrevisiondateend_year'},
1114: );
1115: # Test to see if date windows are legitimate
1116: if ($datequery=~/^Incorrect/) {
1117: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1118: return ;
1119: } elsif ($datequery) {
1120: # Here is where you would set up pretty_search_string to output
1121: # date query information.
1122: push @queries,$datequery;
1123: }
1124: # Process form information for custom metadata querying
1125: my $customquery=undef;
1126: # if ($ENV{'form.custommetadata'}) {
1127: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1128: # $ENV{'form.custommetadata'}."</b><br />\n";
1129: # $customquery=&build_custommetadata_query('custommetadata',
1130: # $ENV{'form.custommetadata'});
1131: # }
1132: my $customshow=undef;
1133: # if ($ENV{'form.customshow'}) {
1134: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1135: # $ENV{'form.customshow'}."</b><br />\n";
1136: # $customshow=$ENV{'form.customshow'};
1137: # $customshow=~s/[^\w\s]//g;
1138: # my @fields=split(/\s+/,$customshow);
1139: # $customshow=join(" ",@fields);
1140: # }
1141: ## ---------------------------------------------------------------
1142: ## Deal with restrictions to given domains
1143: ##
1144: my ($libraries_to_query,$pretty_domains_string) =
1145: &parse_domain_restrictions();
1146: $pretty_search_string .= $pretty_domains_string."<br />\n";
1147: #
1148: if (@queries) {
1149: $query=join(" AND ",@queries);
1150: $query="select * from metadata where $query";
1151: } elsif ($customquery) {
1152: $query = '';
1153: }
1154: return ($query,$customquery,$customshow,$libraries_to_query,
1155: $pretty_search_string);
1156: }
1157:
1158: sub parse_domain_restrictions {
1159: my $libraries_to_query = undef;
1160: # $ENV{'form.domains'} can be either a scalar or an array reference.
1161: # We need an array.
1162: if (! exists($ENV{'form.domains'})) {
1163: return (undef,'');
1164: }
1165: my @allowed_domains;
1166: if (ref($ENV{'form.domains'})) {
1167: @allowed_domains = @{$ENV{'form.domains'}};
1168: } else {
1169: @allowed_domains = ($ENV{'form.domains'});
1170: }
1171: my %domain_hash = ();
1172: my $pretty_domains_string;
1173: foreach (@allowed_domains) {
1174: $domain_hash{$_}++;
1175: }
1176: if ($domain_hash{'any'}) {
1177: $pretty_domains_string = "In all LON-CAPA domains.";
1178: } else {
1179: if (@allowed_domains > 1) {
1180: $pretty_domains_string = "In LON-CAPA domains:";
1181: } else {
1182: $pretty_domains_string = "In LON-CAPA domain ";
1183: }
1184: foreach (sort @allowed_domains) {
1185: $pretty_domains_string .= "<b>".$_."</b> ";
1186: }
1187: foreach (keys(%Apache::lonnet::libserv)) {
1188: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1189: push @$libraries_to_query,$_;
1190: }
1191: }
1192: }
1193: return ($libraries_to_query,$pretty_domains_string);
1194: }
1195:
1196: ######################################################################
1197: ######################################################################
1198:
1199: =pod
1200:
1201: =item &parse_basic_search()
1202:
1203: Parse the basic search form and return a scalar containing an sql query.
1204:
1205: =cut
1206:
1207: ######################################################################
1208: ######################################################################
1209: sub parse_basic_search {
1210: my ($r,$closebutton)=@_;
1211: # Clean up fields for safety
1212: for my $field ('basicexp') {
1213: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1214: }
1215: foreach ('mode','form','element') {
1216: # is this required? Hmmm.
1217: next unless (exists($ENV{"form.$_"}));
1218: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1219: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1220: }
1221: my ($libraries_to_query,$pretty_domains_string) =
1222: &parse_domain_restrictions();
1223: # Check to see if enough is filled in
1224: unless (&filled($ENV{'form.basicexp'})) {
1225: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1226: return OK;
1227: }
1228: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1229: my $search_string = $ENV{'form.basicexp'};
1230: if ($ENV{'form.related'}) {
1231: my @New_Words;
1232: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1233: if (@New_Words) {
1234: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1235: } else {
1236: $pretty_search_string .= " with no related words.";
1237: }
1238: }
1239: # Build SQL query string based on form page
1240: my $query='';
1241: my $concatarg=join(',',
1242: ('title', 'author', 'subject', 'notes', 'abstract',
1243: 'keywords'));
1244: $concatarg='title' if $ENV{'form.titleonly'};
1245: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1246: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1247: $pretty_search_string .= ' '.$pretty_domains_string;
1248: }
1249: $pretty_search_string .= "<br />\n";
1250: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1251: # &Apache::lonnet::logthis($final_query);
1252: return ($final_query,$pretty_search_string,
1253: $libraries_to_query);
1254: }
1255:
1256:
1257: ######################################################################
1258: ######################################################################
1259:
1260: =pod
1261:
1262: =item &related_version
1263:
1264: Modifies an input string to include related words. Words in the string
1265: are replaced with parenthesized lists of 'OR'd words. For example
1266: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1267:
1268: Note: Using this twice on a string is probably silly.
1269:
1270: =cut
1271:
1272: ######################################################################
1273: ######################################################################
1274: sub related_version {
1275: my $search_string = shift;
1276: my $result = $search_string;
1277: my %New_Words = ();
1278: while ($search_string =~ /(\w+)/cg) {
1279: my $word = $1;
1280: next if (lc($word) =~ /\b(or|and|not)\b/);
1281: my @Words = &Apache::loncommon::get_related_words($word);
1282: @Words = ($#Words>4? @Words[0..4] : @Words);
1283: foreach (@Words) { $New_Words{$_}++;}
1284: my $replacement = join " OR ", ($word,@Words);
1285: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1286: }
1287: return $result,sort(keys(%New_Words));
1288: }
1289:
1290: ######################################################################
1291: ######################################################################
1292:
1293: =pod
1294:
1295: =item &build_SQL_query()
1296:
1297: Builds a SQL query string from a logical expression with AND/OR keywords
1298: using Text::Query and &recursive_SQL_query_builder()
1299:
1300: =cut
1301:
1302: ######################################################################
1303: ######################################################################
1304: sub build_SQL_query {
1305: my ($field_name,$logic_statement)=@_;
1306: my $q=new Text::Query('abc',
1307: -parse => 'Text::Query::ParseAdvanced',
1308: -build => 'Text::Query::Build');
1309: $q->prepare($logic_statement);
1310: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1311: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1312: return $sql_query;
1313: }
1314:
1315: ######################################################################
1316: ######################################################################
1317:
1318: =pod
1319:
1320: =item &build_custommetadata_query()
1321:
1322: Constructs a custom metadata query using a rather heinous regular
1323: expression.
1324:
1325: =cut
1326:
1327: ######################################################################
1328: ######################################################################
1329: sub build_custommetadata_query {
1330: my ($field_name,$logic_statement)=@_;
1331: my $q=new Text::Query('abc',
1332: -parse => 'Text::Query::ParseAdvanced',
1333: -build => 'Text::Query::BuildAdvancedString');
1334: $q->prepare($logic_statement);
1335: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1336: # quick fix to change literal into xml tag-matching
1337: # will eventually have to write a separate builder module
1338: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1339: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1340: /\\<$1\\>?# \<wordone\>
1341: \[\^\\<\]?# [^\<]
1342: \*$2\[\^\\<\]?# *wordtwo[^\<]
1343: \*\\<\\\/$1\\>?# *\<\/wordone\>
1344: /g;
1345: return $matchexp;
1346: }
1347:
1348: ######################################################################
1349: ######################################################################
1350:
1351: =pod
1352:
1353: =item &recursive_SQL_query_build()
1354:
1355: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1356:
1357: =cut
1358:
1359: ######################################################################
1360: ######################################################################
1361: sub recursive_SQL_query_build {
1362: my ($dkey,$pattern)=@_;
1363: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1364: return $pattern unless @matches;
1365: foreach my $match (@matches) {
1366: $match=~/\[ (\w+)\s(.*) \]/;
1367: my ($key,$value)=($1,$2);
1368: my $replacement='';
1369: if ($key eq 'literal') {
1370: $replacement="($dkey LIKE \"\%$value\%\")";
1371: } elsif (lc($key) eq 'not') {
1372: $value=~s/LIKE/NOT LIKE/;
1373: # $replacement="($dkey not like $value)";
1374: $replacement="$value";
1375: } elsif ($key eq 'and') {
1376: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1377: $replacement="($1 AND $2)";
1378: } elsif ($key eq 'or') {
1379: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1380: $replacement="($1 OR $2)";
1381: }
1382: substr($pattern,
1383: index($pattern,$match),
1384: length($match),
1385: $replacement);
1386: }
1387: &recursive_SQL_query_build($dkey,$pattern);
1388: }
1389:
1390: ######################################################################
1391: ######################################################################
1392:
1393: =pod
1394:
1395: =item &build_date_queries()
1396:
1397: Builds a SQL logic query to check time/date entries.
1398: Also reports errors (check for /^Incorrect/).
1399:
1400: =cut
1401:
1402: ######################################################################
1403: ######################################################################
1404: sub build_date_queries {
1405: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1406: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1407: my @queries;
1408: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1409: unless ($cmonth1 and $cday1 and $cyear1 and
1410: $cmonth2 and $cday2 and $cyear2) {
1411: return "Incorrect entry for the creation date. You must specify ".
1412: "a starting month, day, and year and an ending month, ".
1413: "day, and year.";
1414: }
1415: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1416: $cnumeric1+=0;
1417: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1418: $cnumeric2+=0;
1419: if ($cnumeric1>$cnumeric2) {
1420: return "Incorrect entry for the creation date. The starting ".
1421: "date must occur before the ending date.";
1422: }
1423: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1424: "$cyear2-$cmonth2-$cday2 23:59:59')";
1425: push @queries,$cquery;
1426: }
1427: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1428: unless ($lmonth1 and $lday1 and $lyear1 and
1429: $lmonth2 and $lday2 and $lyear2) {
1430: return "Incorrect entry for the last revision date. You must ".
1431: "specify a starting month, day, and year and an ending ".
1432: "month, day, and year.";
1433: }
1434: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1435: $lnumeric1+=0;
1436: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1437: $lnumeric2+=0;
1438: if ($lnumeric1>$lnumeric2) {
1439: return "Incorrect entry for the last revision date. The ".
1440: "starting date must occur before the ending date.";
1441: }
1442: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1443: "$lyear2-$lmonth2-$lday2 23:59:59')";
1444: push @queries,$lquery;
1445: }
1446: if (@queries) {
1447: return join(" AND ",@queries);
1448: }
1449: return '';
1450: }
1451:
1452: ######################################################################
1453: ######################################################################
1454:
1455: =pod
1456:
1457: =item ©right_check()
1458:
1459: =cut
1460:
1461: ######################################################################
1462: ######################################################################
1463: sub copyright_check {
1464: my $Metadata = shift;
1465: # Check copyright tags and skip results the user cannot use
1466: my (undef,undef,$resdom,$resname) = split('/',
1467: $Metadata->{'url'});
1468: # Check for priv
1469: if (($Metadata->{'copyright'} eq 'priv') &&
1470: (($ENV{'user.name'} ne $resname) &&
1471: ($ENV{'user.domain'} ne $resdom))) {
1472: return 0;
1473: }
1474: # Check for domain
1475: if (($Metadata->{'copyright'} eq 'domain') &&
1476: ($ENV{'user.domain'} ne $resdom)) {
1477: return 0;
1478: }
1479: return 1;
1480: }
1481:
1482:
1483: ######################################################################
1484: ######################################################################
1485:
1486: =pod
1487:
1488: =item &ensure_db_and_table
1489:
1490: Ensure we can get lonmysql to connect to the database and the table we
1491: need exists.
1492:
1493: Inputs: $r, table id
1494:
1495: Returns: undef on error, 1 if the table exists.
1496:
1497: =cut
1498:
1499: ######################################################################
1500: ######################################################################
1501: sub ensure_db_and_table {
1502: my ($r,$table) = @_;
1503: ##
1504: ## Sanity check the table id.
1505: ##
1506: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1507: $r->print("Unable to retrieve search results. ".
1508: "Unable to determine the table results were stored in. ".
1509: "</body></html>");
1510: return undef;
1511: }
1512: ##
1513: ## Make sure we can connect and the table exists.
1514: ##
1515: my $connection_result = &Apache::lonmysql::connect_to_db();
1516: if (!defined($connection_result)) {
1517: $r->print("Unable to connect to the MySQL database where your results".
1518: " are stored. </body></html>");
1519: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1520: " connect to database.");
1521: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1522: return undef;
1523: }
1524: my $table_check = &Apache::lonmysql::check_table($table);
1525: if (! defined($table_check)) {
1526: $r->print("A MySQL error has occurred.</form></body></html>");
1527: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1528: " of table ".$table);
1529: return undef;
1530: } elsif (! $table_check) {
1531: $r->print("The table of results could not be found.");
1532: &Apache::lonnet::logthis("The user requested a table, ".$table.
1533: ", that could not be found.");
1534: return undef;
1535: }
1536: return 1;
1537: }
1538:
1539: ######################################################################
1540: ######################################################################
1541:
1542: =pod
1543:
1544: =item &print_sort_form
1545:
1546: =cut
1547:
1548: ######################################################################
1549: ######################################################################
1550: sub print_sort_form {
1551: my ($r,$pretty_query_string) = @_;
1552: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1553: ##
1554: my %SortableFields=&Apache::lonlocal::texthash(
1555: id => 'Default',
1556: title => 'Title',
1557: author => 'Author',
1558: subject => 'Subject',
1559: url => 'URL',
1560: version => 'Version Number',
1561: mime => 'Mime type',
1562: lang => 'Language',
1563: owner => 'Owner/Publisher',
1564: copyright => 'Copyright',
1565: hostname => 'Host',
1566: creationdate => 'Creation Date',
1567: lastrevisiondate => 'Revision Date'
1568: );
1569: ##
1570: my $table = $ENV{'form.table'};
1571: return if (! &ensure_db_and_table($r,$table));
1572: ##
1573: ## Get the number of results
1574: ##
1575: my $total_results = &Apache::lonmysql::number_of_rows($table);
1576: if (! defined($total_results)) {
1577: $r->print("A MySQL error has occurred.</form></body></html>");
1578: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1579: " of rows in table ".$table);
1580: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1581: return;
1582: }
1583: my $result;
1584: $result.=<<END;
1585: <html>
1586: <head>
1587: <script>
1588: function change_sort() {
1589: var newloc = "/adm/searchcat?phase=results";
1590: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1591: newloc += "&sortby=";
1592: newloc += document.forms.statusform.elements.sortby.value;
1593: parent.resultsframe.location= newloc;
1594: }
1595: </script>
1596: <title>Results</title>
1597: </head>
1598: $bodytag
1599: <form name="statusform" action="" method="post">
1600: <input type="hidden" name="Queue" value="" />
1601: END
1602:
1603: #<h2>Sort Results</h2>
1604: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1605: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1606: # foreach (keys(%SortableFields)) {
1607: # $result.="<option name=\"$_\"";
1608: # if ($_ eq $ENV{'form.sortby'}) {
1609: # $result.=" selected ";
1610: # }
1611: # $result.=" >$SortableFields{$_}</option>\n";
1612: # }
1613: # $result.="</select>\n";
1614: my $revise = &revise_button();
1615: $result.=<<END;
1616: <p>
1617: There are $total_results matches to your query. $revise
1618: </p><p>
1619: Search:$pretty_query_string
1620: </p>
1621: </form>
1622: </body>
1623: </html>
1624: END
1625: $r->print($result);
1626: return;
1627: }
1628:
1629: #####################################################################
1630: #####################################################################
1631:
1632: =pod
1633:
1634: =item MySQL Table Description
1635:
1636: MySQL table creation requires a precise description of the data to be
1637: stored. The use of the correct types to hold data is vital to efficient
1638: storage and quick retrieval of records. The columns must be described in
1639: the following format:
1640:
1641: =cut
1642:
1643: #####################################################################
1644: #####################################################################
1645:
1646: my @Datatypes =
1647: ( { name => 'id',
1648: type => 'MEDIUMINT',
1649: restrictions => 'UNSIGNED NOT NULL',
1650: primary_key => 'yes',
1651: auto_inc => 'yes' },
1652: { name => 'title', type=>'TEXT'},
1653: { name => 'author', type=>'TEXT'},
1654: { name => 'subject', type=>'TEXT'},
1655: { name => 'url', type=>'TEXT', restrictions => 'NOT NULL' },
1656: { name => 'keywords', type=>'TEXT'},
1657: { name => 'version', type=>'TEXT'},
1658: { name => 'notes', type=>'TEXT'},
1659: { name => 'abstract', type=>'TEXT'},
1660: { name => 'mime', type=>'TEXT'},
1661: { name => 'language', type=>'TEXT'},
1662: { name => 'owner', type=>'TEXT'},
1663: { name => 'copyright', type=>'TEXT'},
1664: { name => 'dependencies', type=>'TEXT'},
1665: { name => 'modifyinguser', type=>'TEXT'},
1666: { name => 'authorspace', type=>'TEXT'},
1667: { name => 'lowestgradelevel', type=>'INT'},
1668: { name => 'highestgradelevel', type=>'INT'},
1669: { name => 'standards', type=>'TEXT'},
1670: { name => 'count', type=>'INT'},
1671: { name => 'course', type=>'INT'},
1672: { name => 'course_list', type=>'TEXT'},
1673: { name => 'goto', type=>'INT'},
1674: { name => 'goto_list', type=>'TEXT'},
1675: { name => 'comefrom', type=>'INT'},
1676: { name => 'comefrom_list', type=>'TEXT'},
1677: { name => 'sequsage', type=>'INT'},
1678: { name => 'sequsage_list', type=>'TEXT'},
1679: { name => 'stdno', type=>'INT'},
1680: { name => 'stdno_list', type=>'TEXT'},
1681: { name => 'avetries', type=>'FLOAT'},
1682: { name => 'avetries_list', type=>'TEXT'},
1683: { name => 'difficulty', type=>'FLOAT'},
1684: { name => 'difficulty_list', type=>'TEXT'},
1685: { name => 'clear', type=>'FLOAT'},
1686: { name => 'technical', type=>'FLOAT'},
1687: { name => 'correct', type=>'FLOAT'},
1688: { name => 'helpful', type=>'FLOAT'},
1689: { name => 'depth', type=>'FLOAT'},
1690: { name => 'hostname', type=> 'TEXT'},
1691: #--------------------------------------------------
1692: { name => 'creationdate', type=>'DATETIME'},
1693: { name => 'lastrevisiondate', type=>'DATETIME'},
1694: #--------------------------------------------------
1695: );
1696:
1697: my @Fullindicies =
1698: qw/title/;
1699: # qw/title author subject abstract mime language owner copyright/;
1700:
1701: ######################################################################
1702: ######################################################################
1703:
1704: =pod
1705:
1706: =item &create_results_table()
1707:
1708: Creates the table of search results by calling lonmysql. Stores the
1709: table id in $ENV{'form.table'}
1710:
1711: Inputs: none.
1712:
1713: Returns: the identifier of the table on success, undef on error.
1714:
1715: =cut
1716:
1717: ######################################################################
1718: ######################################################################
1719: sub create_results_table {
1720: my $table = &Apache::lonmysql::create_table
1721: ( { columns => \@Datatypes,
1722: FULLTEXT => [{'columns' => \@Fullindicies},],
1723: } );
1724: if (defined($table)) {
1725: $ENV{'form.table'} = $table;
1726: return $table;
1727: }
1728: return undef; # Error...
1729: }
1730:
1731: ######################################################################
1732: ######################################################################
1733:
1734: =pod
1735:
1736: =item Search Status update functions
1737:
1738: Each of the following functions changes the values of one of the
1739: input fields used to display the search status to the user. The names
1740: should be explanatory.
1741:
1742: Inputs: Apache request handler ($r), text to display.
1743:
1744: Returns: Nothing.
1745:
1746: =over 4
1747:
1748: =item &update_count_status()
1749:
1750: =item &update_status()
1751:
1752: =item &update_seconds()
1753:
1754: =back
1755:
1756: =cut
1757:
1758: ######################################################################
1759: ######################################################################
1760: sub update_count_status {
1761: my ($r,$text) = @_;
1762: $text =~ s/\'/\\\'/g;
1763: $r->print
1764: ("<script>document.statusform.count.value = ' $text'</script>\n");
1765: $r->rflush();
1766: }
1767:
1768: sub update_status {
1769: my ($r,$text) = @_;
1770: $text =~ s/\'/\\\'/g;
1771: $r->print
1772: ("<script>document.statusform.status.value = ' $text'</script>\n");
1773: $r->rflush();
1774: }
1775:
1776: sub update_seconds {
1777: my ($r,$text) = @_;
1778: $text =~ s/\'/\\\'/g;
1779: $r->print
1780: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1781: $r->rflush();
1782: }
1783:
1784: ######################################################################
1785: ######################################################################
1786:
1787: =pod
1788:
1789: =item &revise_button
1790:
1791: Inputs: None
1792:
1793: Returns: html string for a 'revise search' button.
1794:
1795: =cut
1796:
1797: ######################################################################
1798: ######################################################################
1799: sub revise_button {
1800: my $revise_phase = 'disp_basic';
1801: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1802: my $newloc = '/adm/searchcat'.
1803: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1804: '&cleargroupsort=1'.
1805: '&phase='.$revise_phase;
1806: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1807: qq{ onClick="parent.location='$newloc';" /> };
1808: return $result;
1809: }
1810:
1811: ######################################################################
1812: ######################################################################
1813:
1814: =pod
1815:
1816: =item &run_search
1817:
1818: =cut
1819:
1820: ######################################################################
1821: ######################################################################
1822: sub run_search {
1823: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1824: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1825: my $connection = $r->connection;
1826: #
1827: # Timing variables
1828: #
1829: my $starttime = time;
1830: my $max_time = 30; # seconds for the search to complete
1831: #
1832: # Print run_search header
1833: #
1834: $r->print(<<END);
1835: <html>
1836: <head><title>Search Status</title></head>
1837: $bodytag
1838: <form name="statusform" action="" method="post">
1839: <input type="hidden" name="Queue" value="" />
1840: END
1841: # Check to see if $pretty_string has more than one carriage return.
1842: # Assume \n s are following <br /> s and truncate the value.
1843: # (there is probably a better way)...
1844: my @Lines = split /<br \/>/,$pretty_string;
1845: if (@Lines > 2) {
1846: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1847: }
1848: $r->print(&mt("Search").": ".$pretty_string);
1849: $r->rflush();
1850: #
1851: # Determine the servers we need to contact.
1852: #
1853: my @Servers_to_contact;
1854: if (defined($serverlist)) {
1855: if (ref($serverlist) eq 'ARRAY') {
1856: @Servers_to_contact = @$serverlist;
1857: } else {
1858: @Servers_to_contact = ($serverlist);
1859: }
1860: } else {
1861: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1862: }
1863: my %Server_status;
1864: my $table =$ENV{'form.table'};
1865: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1866: $r->print("Unable to determine table id to store search results in.".
1867: "The search has been aborted.</body></html>");
1868: return;
1869: }
1870: my $table_status = &Apache::lonmysql::check_table($table);
1871: if (! defined($table_status)) {
1872: $r->print("Unable to determine status of table.</body></html>");
1873: &Apache::lonnet::logthis("Bogus table id of $table for ".
1874: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1875: &Apache::lonnet::logthis("lonmysql error = ".
1876: &Apache::lonmysql::get_error());
1877: return;
1878: }
1879: if (! $table_status) {
1880: $r->print("The table id,$table, we tried to use is invalid.".
1881: "The search has been aborted.</body></html>");
1882: return;
1883: }
1884: ##
1885: ## Prepare for the big loop.
1886: ##
1887: my $hitcountsum;
1888: my $server;
1889: my $status;
1890: my $revise = &revise_button();
1891: $r->print(<<END);
1892: <table>
1893: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1894: <tr>
1895: <td><input type="text" name="status" value="" size="30" /></td>
1896: <td><input type="text" name="count" value="" size="10" /></td>
1897: <td><input type="text" name="seconds" value="" size="8" /></td>
1898: <td>$revise</td>
1899: </tr>
1900: </table>
1901: </form>
1902: END
1903: $r->rflush();
1904: my $time_remaining = $max_time - (time - $starttime) ;
1905: my $last_time = $time_remaining;
1906: &update_seconds($r,$time_remaining);
1907: &update_status($r,'contacting '.$Servers_to_contact[0]);
1908: while (($time_remaining > 0) &&
1909: ((@Servers_to_contact) || keys(%Server_status))) {
1910: # Send out a search request if it needs to be done.
1911: if (@Servers_to_contact) {
1912: # Contact one server
1913: my $server = shift(@Servers_to_contact);
1914: &update_status($r,&mt('contacting').' '.$server);
1915: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1916: $customshow,[$server]);
1917: ($server) = keys(%$reply);
1918: $Server_status{$server} = $reply->{$server};
1919: } else {
1920: # wait a sec. to give time for files to be written
1921: # This sleep statement is here instead of outside the else
1922: # block because we do not want to pause if we have servers
1923: # left to contact.
1924: if (scalar (keys(%Server_status))) {
1925: &update_status($r,
1926: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1927: }
1928: sleep(1);
1929: }
1930: #
1931: #
1932: # Loop through the servers we have contacted but do not
1933: # have results from yet, looking for results.
1934: while (my ($server,$status) = each(%Server_status)) {
1935: last if ($connection->aborted());
1936: if ($status eq 'con_lost') {
1937: delete ($Server_status{$server});
1938: next;
1939: }
1940: $status=~/^([\.\w]+)$/;
1941: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1942: if (-e $datafile && ! -e "$datafile.end") {
1943: &update_status($r,&mt('Receiving results from').' '.$server);
1944: next;
1945: }
1946: last if ($connection->aborted());
1947: if (-e "$datafile.end") {
1948: &update_status($r,&mt('Reading results from').' '.$server);
1949: if (-z "$datafile") {
1950: delete($Server_status{$server});
1951: next;
1952: }
1953: my $fh;
1954: if (!($fh=Apache::File->new($datafile))) {
1955: $r->print("Unable to open search results file for ".
1956: "server $server. Omitting from search");
1957: delete($Server_status{$server});
1958: next;
1959: }
1960: # Read in the whole file.
1961: while (my $result = <$fh>) {
1962: last if ($connection->aborted());
1963: # handle custom fields? Someday we will!
1964: chomp($result);
1965: next unless $result;
1966: # Parse the result.
1967: my %Fields = &parse_raw_result($result,$server);
1968: $Fields{'hostname'} = $server;
1969: next if (! ©right_check(\%Fields));
1970: # Store the result in the mysql database
1971: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1972: if (! defined($result)) {
1973: $r->print(&Apache::lonmysql::get_error());
1974: }
1975: # $r->print(&Apache::lonmysql::get_debug());
1976: $hitcountsum ++;
1977: $time_remaining = $max_time - (time - $starttime) ;
1978: if ($last_time - $time_remaining > 0) {
1979: &update_seconds($r,$time_remaining);
1980: $last_time = $time_remaining;
1981: }
1982: if ($hitcountsum % 50 == 0) {
1983: &update_count_status($r,$hitcountsum);
1984: }
1985: } # End of foreach (@results)
1986: $fh->close();
1987: # $server is only deleted if the results file has been
1988: # found and (successfully) opened. This may be a bad idea.
1989: delete($Server_status{$server});
1990: }
1991: last if ($connection->aborted());
1992: &update_count_status($r,$hitcountsum);
1993: }
1994: last if ($connection->aborted());
1995: # Finished looping through the servers
1996: $starttime = time if (@Servers_to_contact);
1997: $time_remaining = $max_time - (time - $starttime) ;
1998: if ($last_time - $time_remaining > 0) {
1999: $last_time = $time_remaining;
2000: &update_seconds($r,$time_remaining);
2001: }
2002: }
2003: &update_status($r,&mt('Search Complete').$server);
2004: &update_seconds($r,0);
2005: &Apache::lonmysql::disconnect_from_db();
2006: # We have run out of time or run out of servers to talk to and
2007: # results to get.
2008: $r->print("</body></html>");
2009: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2010: $r->print("<script>".
2011: "window.location='/adm/searchcat?".
2012: "phase=sort&".
2013: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2014: "</script>");
2015: }
2016: return;
2017: }
2018:
2019: ######################################################################
2020: ######################################################################
2021: =pod
2022:
2023: =item &prev_next_buttons
2024:
2025: =cut
2026:
2027: ######################################################################
2028: ######################################################################
2029: sub prev_next_buttons {
2030: my ($current_min,$show,$total,$parms) = @_;
2031: return '' if ($show eq 'all'); # No links if you get them all at once.
2032: my $links;
2033: ##
2034: ## Prev
2035: my $prev_min = $current_min - $show;
2036: $prev_min = 1 if $prev_min < 1;
2037: if ($prev_min < $current_min) {
2038: $links .= qq{
2039: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2040: };
2041: } else {
2042: $links .= 'prev';
2043: }
2044: ##
2045: ## Pages.... Someday.
2046: ##
2047: $links .= qq{
2048: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2049: };
2050: ##
2051: ## Next
2052: my $next_min = $current_min + $show;
2053: $next_min = $current_min if ($next_min > $total);
2054: if ($next_min != $current_min) {
2055: $links .= qq{
2056: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2057: };
2058: } else {
2059: $links .= ' next';
2060: }
2061: return $links;
2062: }
2063: ######################################################################
2064: ######################################################################
2065:
2066: =pod
2067:
2068: =item &display_results
2069:
2070: =cut
2071:
2072: ######################################################################
2073: ######################################################################
2074: sub display_results {
2075: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2076: my $connection = $r->connection;
2077: $r->print(&search_results_header($importbutton,$closebutton));
2078: ##
2079: ## Set viewing function
2080: ##
2081: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2082: if (!defined($viewfunction)) {
2083: $r->print("Internal Error - Bad view selected.\n");
2084: $r->rflush();
2085: return;
2086: }
2087: ##
2088: ## $checkbox_num is a count of the number of checkboxes output on the
2089: ## page this is used only during catalogmode=groupsearch.
2090: my $checkbox_num = 0;
2091: ##
2092: ## Get the catalog controls setup
2093: ##
2094: my $action = "/adm/searchcat?phase=results";
2095: ##
2096: ## Deal with groupsearch
2097: ##
2098: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2099: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2100: &GDBM_WRCREAT(),0640)) {
2101: $r->print('Unable to store import results.</form></body></html>');
2102: $r->rflush();
2103: return;
2104: }
2105: }
2106: ##
2107: ## Prepare the table for querying
2108: ##
2109: my $table = $ENV{'form.table'};
2110: return if (! &ensure_db_and_table($r,$table));
2111: ##
2112: ## Get the number of results
2113: ##
2114: my $total_results = &Apache::lonmysql::number_of_rows($table);
2115: if (! defined($total_results)) {
2116: $r->print("A MySQL error has occurred.</form></body></html>");
2117: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2118: " of rows in table ".$table);
2119: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2120: return;
2121: }
2122: ##
2123: ## Determine how many results we need to get
2124: ##
2125: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2126: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2127: my $min = $ENV{'form.start'};
2128: my $max;
2129: if ($ENV{'form.show'} eq 'all') {
2130: $max = $total_results ;
2131: } else {
2132: $max = $min + $ENV{'form.show'} - 1;
2133: $max = $total_results if ($max > $total_results);
2134: }
2135: ##
2136: ## Output links (if necessary) for 'prev' and 'next' pages.
2137: ##
2138: $r->print
2139: ('<center>'.
2140: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2141: "table=".$ENV{'form.table'}.
2142: "&phase=results".
2143: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2144: ."</center>\n"
2145: );
2146: if ($total_results == 0) {
2147: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2148: '<h3>'.&mt('There are currently no results').'.</h3>'.
2149: "</form></body></html>");
2150: return;
2151: } else {
2152: $r->print
2153: ("<center>Results $min to $max out of $total_results</center>\n");
2154: }
2155: ##
2156: ## Get results from MySQL table
2157: ##
2158: my @Results = &Apache::lonmysql::get_rows($table,
2159: 'id>='.$min.' AND id<='.$max);
2160: ##
2161: ## Loop through the results and output them.
2162: ##
2163: foreach my $row (@Results) {
2164: if ($connection->aborted()) {
2165: &cleanup();
2166: return;
2167: }
2168: my %Fields = %{&parse_row(@$row)};
2169: my $output="<p>\n";
2170: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2171: $Fields{'id'},$checkbox_num++);
2172: # Render the result into html
2173: $output.= &$viewfunction($prefix,%Fields);
2174: # Print them out as they come in.
2175: $r->print($output);
2176: $r->rflush();
2177: }
2178: if (@Results < 1) {
2179: $r->print(&mt("There were no results matching your query"));
2180: } else {
2181: $r->print
2182: ('<center>'.
2183: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2184: "table=".$ENV{'form.table'}.
2185: "&phase=results".
2186: "&persistent_db_id=".
2187: $ENV{'form.persistent_db_id'})
2188: ."</center>\n"
2189: );
2190: }
2191: $r->print("</form></body></html>");
2192: $r->rflush();
2193: untie %groupsearch_db if (tied(%groupsearch_db));
2194: return;
2195: }
2196:
2197: ######################################################################
2198: ######################################################################
2199:
2200: =pod
2201:
2202: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2203:
2204: Returns html needed for the various catalog modes. Gets inputs from
2205: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2206:
2207: =cut
2208:
2209: ######################################################################
2210: ######################################################################
2211: sub catalogmode_output {
2212: my $output = '';
2213: my ($title,$url,$fnum,$checkbox_num) = @_;
2214: if ($ENV{'form.catalogmode'} eq 'interactive') {
2215: $title=~ s/\'/\\\'/g;
2216: if ($ENV{'form.catalogmode'} eq 'interactive') {
2217: $output.=<<END
2218: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2219: onClick="javascript:select_data('$title','$url')">
2220: </font>
2221: END
2222: }
2223: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2224: $groupsearch_db{"pre_${fnum}_link"}=$url;
2225: $groupsearch_db{"pre_${fnum}_title"}=$title;
2226: $output.=<<END;
2227: <font size='-1'>
2228: <input type="checkbox" name="returnvalues" value="SELECT"
2229: onClick="javascript:queue($checkbox_num,$fnum)" />
2230: </font>
2231: END
2232: }
2233: return $output;
2234: }
2235: ######################################################################
2236: ######################################################################
2237:
2238: =pod
2239:
2240: =item &parse_row
2241:
2242: Parse a row returned from the database.
2243:
2244: =cut
2245:
2246: ######################################################################
2247: ######################################################################
2248: sub parse_row {
2249: my @Row = @_;
2250: my %Fields;
2251: for (my $i=0;$i<=$#Row;$i++) {
2252: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2253: }
2254: $Fields{'language'} =
2255: &Apache::loncommon::languagedescription($Fields{'language'});
2256: $Fields{'copyrighttag'} =
2257: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2258: $Fields{'mimetag'} =
2259: &Apache::loncommon::filedescription($Fields{'mime'});
2260: return \%Fields;
2261: }
2262:
2263: ###########################################################
2264: ###########################################################
2265:
2266: =pod
2267:
2268: =item &parse_raw_result()
2269:
2270: Takes a line from the file of results and parse it. Returns a hash
2271: with keys according to column labels
2272:
2273: In addition, the following tags are set by calling the appropriate
2274: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2275:
2276: The 'title' field is set to "Untitled" if the title field is blank.
2277:
2278: 'abstract' and 'keywords' are truncated to 200 characters.
2279:
2280: =cut
2281:
2282: ###########################################################
2283: ###########################################################
2284: sub parse_raw_result {
2285: my ($result,$hostname) = @_;
2286: # conclude from self to others regarding fields
2287: my %Fields=&Apache::lonmeta::metadata_col_to_hash(
2288: map {
2289: &Apache::lonnet::unescape($_);
2290: } (split(/\,/,$result))
2291: );
2292: return %Fields;
2293: }
2294:
2295: ###########################################################
2296: ###########################################################
2297:
2298: =pod
2299:
2300: =item &handle_custom_fields()
2301:
2302: =cut
2303:
2304: ###########################################################
2305: ###########################################################
2306: sub handle_custom_fields {
2307: my @results = @{shift()};
2308: my $customshow='';
2309: my $extrashow='';
2310: my @customfields;
2311: if ($ENV{'form.customshow'}) {
2312: $customshow=$ENV{'form.customshow'};
2313: $customshow=~s/[^\w\s]//g;
2314: my @fields=map {
2315: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2316: } split(/\s+/,$customshow);
2317: @customfields=split(/\s+/,$customshow);
2318: if ($customshow) {
2319: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2320: }
2321: }
2322: my $customdata='';
2323: my %customhash;
2324: foreach my $result (@results) {
2325: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2326: my $tmp=$result;
2327: $tmp=~s/^custom\=//;
2328: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2329: } split(/\,/,$tmp);
2330: $customhash{$k}=$v;
2331: }
2332: }
2333: return ($extrashow,\@customfields,\%customhash);
2334: }
2335:
2336: ######################################################################
2337: ######################################################################
2338:
2339: =pod
2340:
2341: =item &search_results_header
2342:
2343: Output the proper html headers and javascript code to deal with different
2344: calling modes.
2345:
2346: Takes most inputs directly from %ENV, except $mode.
2347:
2348: =over 4
2349:
2350: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2351:
2352: =back
2353:
2354: The following environment variables are checked:
2355:
2356: =over 4
2357:
2358: =item 'form.catalogmode'
2359:
2360: Checked for 'interactive' and 'groupsearch'.
2361:
2362: =item 'form.mode'
2363:
2364: Checked for existance & 'edit' mode.
2365:
2366: =item 'form.form'
2367:
2368: Contains the name of the form that has the input fields to set
2369:
2370: =item 'form.element'
2371:
2372: the name of the input field to put the URL into
2373:
2374: =item 'form.titleelement'
2375:
2376: the name of the input field to put the title into
2377:
2378: =back
2379:
2380: =cut
2381:
2382: ######################################################################
2383: ######################################################################
2384: sub search_results_header {
2385: my ($importbutton,$closebutton) = @_;
2386: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2387: my $result = '';
2388: # output beginning of search page
2389: # conditional output of script functions dependent on the mode in
2390: # which the search was invoked
2391: if ($ENV{'form.catalogmode'} eq 'interactive'){
2392: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2393: $result.=<<SCRIPT;
2394: <script type="text/javascript">
2395: function select_data(title,url) {
2396: changeTitle(title);
2397: changeURL(url);
2398: parent.close();
2399: }
2400: function changeTitle(val) {
2401: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2402: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2403: }
2404: }
2405: function changeURL(val) {
2406: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2407: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2408: }
2409: }
2410: </script>
2411: SCRIPT
2412: } elsif ($ENV{'form.mode'} eq 'edit') {
2413: my $form = $ENV{'form.form'};
2414: my $element = $ENV{'form.element'};
2415: my $titleelement = $ENV{'form.titleelement'};
2416: my $changetitle;
2417: if (!$titleelement) {
2418: $changetitle='function changeTitle(val) {}';
2419: } else {
2420: $changetitle=<<END;
2421: function changeTitle(val) {
2422: if (parent.targetwin.document) {
2423: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2424: } else {
2425: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2426: alert("Unable to transfer data to "+url);
2427: }
2428: }
2429: END
2430: }
2431:
2432: $result.=<<SCRIPT;
2433: <script type="text/javascript">
2434: function select_data(title,url) {
2435: changeURL(url);
2436: changeTitle(title);
2437: parent.close();
2438: }
2439: $changetitle
2440: function changeURL(val) {
2441: if (parent.targetwin.document) {
2442: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2443: } else {
2444: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2445: alert("Unable to transfer data to "+url);
2446: }
2447: }
2448: </script>
2449: SCRIPT
2450: }
2451: }
2452: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2453: <script type="text/javascript">
2454: function queue(checkbox_num,val) {
2455: if (document.forms.results.returnvalues.length != "undefined" &&
2456: typeof(document.forms.results.returnvalues.length) == "number") {
2457: if (document.forms.results.returnvalues[checkbox_num].checked) {
2458: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2459: } else {
2460: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2461: }
2462: } else {
2463: if (document.forms.results.returnvalues.checked) {
2464: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2465: } else {
2466: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2467: }
2468: }
2469: }
2470: function select_group() {
2471: parent.window.location=
2472: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2473: parent.statusframe.document.forms.statusform.elements.Queue.value;
2474: }
2475: </script>
2476: SCRIPT
2477: $result.=<<END;
2478: </head>
2479: $bodytag
2480: <form name="results" method="post" action="" >
2481: <input type="hidden" name="Queue" value="" />
2482: $importbutton
2483: END
2484: return $result;
2485: }
2486:
2487: ######################################################################
2488: ######################################################################
2489: sub search_status_header {
2490: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2491: return <<ENDSTATUS;
2492: <html><head><title>Search Status</title></head>
2493: $bodytag
2494: <h3>Search Status</h3>
2495: Sending search request to LON-CAPA servers.<br />
2496: ENDSTATUS
2497: }
2498:
2499: sub results_link {
2500: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2501: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2502: my $results_link = $basic_link."&phase=results".
2503: "&pause=1"."&start=1";
2504: return $results_link;
2505: }
2506:
2507: ######################################################################
2508: ######################################################################
2509: sub print_frames_interface {
2510: my $r = shift;
2511: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2512: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2513: my $run_search_link = $basic_link."&phase=run_search";
2514: my $results_link = &results_link();
2515: my $result = <<"ENDFRAMES";
2516: <html>
2517: <head>
2518: <script>
2519: var targetwin = opener;
2520: var queue = '';
2521: </script>
2522: <title>LON-CAPA Digital Library Search Results</title>
2523: </head>
2524: <frameset rows="150,*">
2525: <frame name="statusframe" src="$run_search_link">
2526: <frame name="resultsframe" src="$results_link">
2527: </frameset>
2528: </html>
2529: ENDFRAMES
2530:
2531: $r->print($result);
2532: return;
2533: }
2534:
2535: ######################################################################
2536: ######################################################################
2537:
2538: =pod
2539:
2540: =item Metadata Viewing Functions
2541:
2542: Output is a HTML-ified string.
2543: Input arguments are title, author, subject, url, keywords, version,
2544: notes, short abstract, mime, language, creation date,
2545: last revision date, owner, copyright, hostname, and
2546: extra custom metadata to show.
2547:
2548: =over 4
2549:
2550: =item &detailed_citation_view()
2551:
2552: =cut
2553:
2554: ######################################################################
2555: ######################################################################
2556: sub detailed_citation_view {
2557: my ($prefix,%values) = @_;
2558: my $icon=&Apache::loncommon::icon($values{'url'});
2559: my $result=<<END;
2560: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2561: target='search_preview'>$values{'title'}</a></b>
2562: <p>
2563: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2564:
2565: <b>Subject: </b> $values{'subject'}<br />
2566: <b>Keyword(s): </b> $values{'keywords'}<br />
2567: <b>Notes: </b> $values{'notes'}<br />
2568: <b>MIME Type: </b> $values{'mimetag'}<br />
2569: <b>Language: </b> $values{'language'}<br />
2570: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2571: </p>
2572: $values{'extrashow'}
2573: <p>
2574: $values{'shortabstract'}
2575: </p>
2576: <hr align='left' width='200' noshade />
2577: END
2578: return $result;
2579: }
2580:
2581: ######################################################################
2582: ######################################################################
2583:
2584: =pod
2585:
2586: =item &summary_view()
2587:
2588: =cut
2589: ######################################################################
2590: ######################################################################
2591: sub summary_view {
2592: my ($prefix,%values) = @_;
2593: my $icon=&Apache::loncommon::icon($values{'url'});
2594: my $result=<<END;
2595: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2596: target='search_preview'>$values{'author'}</a><br />
2597: $values{'title'}<br />
2598: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2599: $values{'copyrighttag'}<br />
2600: $values{'extrashow'}
2601: </p>
2602: <hr align='left' width='200' noshade />
2603: END
2604: return $result;
2605: }
2606:
2607: ######################################################################
2608: ######################################################################
2609:
2610: =pod
2611:
2612: =item &compact_view()
2613:
2614: =cut
2615:
2616: ######################################################################
2617: ######################################################################
2618: sub compact_view {
2619: my ($prefix,%values) = @_;
2620: my $icon=&Apache::loncommon::icon($values{'url'});
2621: my $result=<<END;
2622: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2623: $values{'title'}</a>
2624: <b>$values{'author'}</b><br />
2625: END
2626: return $result;
2627: }
2628:
2629:
2630: ######################################################################
2631: ######################################################################
2632:
2633: =pod
2634:
2635: =item &fielded_format_view()
2636:
2637: =cut
2638:
2639: ######################################################################
2640: ######################################################################
2641: sub fielded_format_view {
2642: my ($prefix,%values) = @_;
2643: my $icon=&Apache::loncommon::icon($values{'url'});
2644: my $result=<<END;
2645: $prefix <img src="$icon" />
2646: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2647: target='search_preview'>$values{'url'}</a>
2648: <br />
2649: <b>Title:</b> $values{'title'}<br />
2650: <b>Author(s):</b> $values{'author'}<br />
2651: <b>Subject:</b> $values{'subject'}<br />
2652: <b>Keyword(s):</b> $values{'keywords'}<br />
2653: <b>Notes:</b> $values{'notes'}<br />
2654: <b>MIME Type:</b> $values{'mimetag'}<br />
2655: <b>Language:</b> $values{'language'}<br />
2656: <b>Creation Date:</b> $values{'creationdate'}<br />
2657: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2658: <b>Publisher/Owner:</b> $values{'owner'}<br />
2659: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2660: <b>Repository Location:</b> $values{'hostname'}<br />
2661: <b>Abstract:</b> $values{'shortabstract'}<br />
2662: $values{'extrashow'}
2663: </p>
2664: <hr align='left' width='200' noshade />
2665: END
2666: return $result;
2667: }
2668:
2669: ######################################################################
2670: ######################################################################
2671:
2672: =pod
2673:
2674: =item &xml_sgml_view()
2675:
2676: =back
2677:
2678: =cut
2679:
2680: ######################################################################
2681: ######################################################################
2682: sub xml_sgml_view {
2683: my ($prefix,%values) = @_;
2684: my $result=<<END;
2685: $prefix
2686: <pre>
2687: <LonCapaResource>
2688: <url>$values{'url'}</url>
2689: <title>$values{'title'}</title>
2690: <author>$values{'author'}</author>
2691: <subject>$values{'subject'}</subject>
2692: <keywords>$values{'keywords'}</keywords>
2693: <notes>$values{'notes'}</notes>
2694: <mimeInfo>
2695: <mime>$values{'mime'}</mime>
2696: <mimetag>$values{'mimetag'}</mimetag>
2697: </mimeInfo>
2698: <languageInfo>
2699: <language>$values{'language'}</language>
2700: <languagetag>$values{'languagetag'}</languagetag>
2701: </languageInfo>
2702: <creationdate>$values{'creationdate'}</creationdate>
2703: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2704: <owner>$values{'owner'}</owner>
2705: <copyrightInfo>
2706: <copyright>$values{'copyright'}</copyright>
2707: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2708: </copyrightInfo>
2709: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2710: <shortabstract>$values{'shortabstract'}</shortabstract>
2711: </LonCapaResource>
2712: </pre>
2713: $values{'extrashow'}
2714: <hr align='left' width='200' noshade />
2715: END
2716: return $result;
2717: }
2718:
2719: ######################################################################
2720: ######################################################################
2721:
2722: =pod
2723:
2724: =item &filled() see if field is filled.
2725:
2726: =cut
2727:
2728: ######################################################################
2729: ######################################################################
2730: sub filled {
2731: my ($field)=@_;
2732: if ($field=~/\S/ && $field ne 'any') {
2733: return 1;
2734: }
2735: else {
2736: return 0;
2737: }
2738: }
2739:
2740: ######################################################################
2741: ######################################################################
2742:
2743: =pod
2744:
2745: =item &output_blank_field_error()
2746:
2747: Output a complete page that indicates the user has not filled in enough
2748: information to do a search.
2749:
2750: Inputs: $r (Apache request handle), $closebutton, $parms.
2751:
2752: Returns: nothing
2753:
2754: $parms is extra information to include in the 'Revise search request' link.
2755:
2756: =cut
2757:
2758: ######################################################################
2759: ######################################################################
2760: sub output_blank_field_error {
2761: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2762: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2763: # make query information persistent to allow for subsequent revision
2764: $r->print(<<BEGINNING);
2765: <html>
2766: <head>
2767: <title>The LearningOnline Network with CAPA</title>
2768: BEGINNING
2769: $r->print(<<RESULTS);
2770: </head>
2771: $bodytag
2772: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2773: <h1>Search Catalog</h1>
2774: <form method="post" action="/adm/searchcat">
2775: $hidden_fields
2776: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2777: >Revise search request</a>
2778: $closebutton
2779: <hr />
2780: <h3>Unactionable search query.</h3>
2781: <p>
2782: You did not fill in enough information for the search to be started.
2783: You need to fill in relevant fields on the search page in order
2784: for a query to be processed.
2785: </p>
2786: </body>
2787: </html>
2788: RESULTS
2789: }
2790:
2791: ######################################################################
2792: ######################################################################
2793:
2794: =pod
2795:
2796: =item &output_date_error()
2797:
2798: Output a full html page with an error message.
2799:
2800: Inputs:
2801:
2802: $r, the request pointer.
2803: $message, the error message for the user.
2804: $closebutton, the specialized close button needed for groupsearch.
2805:
2806: =cut
2807:
2808: ######################################################################
2809: ######################################################################
2810: sub output_date_error {
2811: my ($r,$message,$closebutton,$hidden_fields)=@_;
2812: # make query information persistent to allow for subsequent revision
2813: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2814: $r->print(<<RESULTS);
2815: <html>
2816: <head>
2817: <title>The LearningOnline Network with CAPA</title>
2818: </head>
2819: $bodytag
2820: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2821: <h1>Search Catalog</h1>
2822: <form method="post" action="/adm/searchcat">
2823: $hidden_fields
2824: <input type='button' value='Revise search request'
2825: onClick='this.form.submit();' />
2826: $closebutton
2827: <hr />
2828: <h3>Error</h3>
2829: <p>
2830: $message
2831: </p>
2832: </body>
2833: </html>
2834: RESULTS
2835: }
2836:
2837: ######################################################################
2838: ######################################################################
2839:
2840: =pod
2841:
2842: =item &start_fresh_session()
2843:
2844: Cleans the global %groupsearch_db by removing all fields which begin with
2845: 'pre_' or 'store'.
2846:
2847: =cut
2848:
2849: ######################################################################
2850: ######################################################################
2851: sub start_fresh_session {
2852: delete $groupsearch_db{'mode_catalog'};
2853: foreach (keys %groupsearch_db) {
2854: if ($_ =~ /^pre_/) {
2855: delete $groupsearch_db{$_};
2856: }
2857: if ($_ =~ /^store/) {
2858: delete $groupsearch_db{$_};
2859: }
2860: }
2861: }
2862:
2863: 1;
2864:
2865: sub cleanup {
2866: if (tied(%groupsearch_db)) {
2867: unless (untie(%groupsearch_db)) {
2868: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2869: }
2870: }
2871: &untiehash();
2872: &Apache::lonmysql::disconnect_from_db();
2873: }
2874:
2875: __END__
2876:
2877: =pod
2878:
2879: =back
2880:
2881: =cut
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