1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.200 2004/01/01 20:13:17 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=&mt('Enter terms or phrases separated by AND, OR, or NOT then press SEARCH below');
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: if (!defined($ENV{'form.viewselect'})) {
606: $ENV{'form.viewselect'} ="Detailed Citation View";
607: }
608: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
609: my $scrout=<<"ENDHEADER";
610: <html>
611: <head>
612: <title>The LearningOnline Network with CAPA</title>
613: <script type="text/javascript">
614: function openhelp(val) {
615: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
616: 'scrollbars=1,width=600,height=300');
617: openhelpwin.focus();
618: }
619: </script>
620: </head>
621: $bodytag
622: Enter terms or phrases separated by search operators
623: such as AND, OR, or NOT.<br />
624: <form method="post" action="/adm/searchcat" name="advsearch">
625: $advanced_buttons
626: $hidden_fields
627: <input type="hidden" name="phase" value="adv_search" />
628: ENDHEADER
629: $scrout.=&viewoptions();
630: my %fields=&Apache::lonmeta::fieldnames();
631: # set undefined to "any"
632: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
633: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
634: $ENV{'form.category'}='any' if (! defined($ENV{'form.category'}));
635:
636:
637: $scrout.='<table>';
638: $scrout.="<tr><th>".&mt('Field').'</th><th>'.&mt('Value').'</th><th>'
639: .&mt('Related').'<br />'.&mt('Words')."</td></tr>\n";
640: foreach ('title','author','keywords','notes','abstract','standards',
641: 'lowestgradelevel','highestgradelevel','mime') {
642: $scrout.='<tr><td>'.&titlefield($fields{$_}).'</td><td>'.
643: &Apache::lonmeta::prettyinput($_,$ENV{'form.'.$_},$_,'advsearch',
644: 1,'</td><td>',$ENV{'form.'.$_.'_related'}).
645: '</td></tr>';
646: }
647: # Hack - an empty table row.
648: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
649: # $scrout.=&searchphrasefield('file<br />extension','extension',
650: # $ENV{'form.extension'});
651: # $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
652: # $scrout.=&searchphrasefield('publisher<br />owner','owner',
653: # $ENV{'form.owner'});
654: $scrout.="</table>\n";
655: # $scrout.=&Apache::lonmeta::selectbox('File Category','category',
656: # $ENV{'form.category'},
657: # 'any','Any category',
658: # undef,
659: # (&Apache::loncommon::filecategories()));
660: #----------------------------------------------------------------
661: # Allow restriction to multiple domains.
662: # I make the crazy assumption that there will never be a domain 'any'.
663: #
664: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
665: : ($ENV{'form.domains'}) );
666: my %domain_hash = ();
667: foreach (@allowed_domains) {
668: $domain_hash{$_}++;
669: }
670: my @domains =&Apache::loncommon::get_domains();
671: # adjust the size of the select box
672: my $size = 4;
673: $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
674: $scrout.="\n".&titlefield(&mt('Domain to be searched')).
675: '<select name="domains" size="'.$size.'" multiple>'."\n".
676: '<option name="any" value="any" '.
677: ($domain_hash{'any'}? 'selected ' :'').
678: '>all domains</option>'."\n";
679: foreach my $dom (sort @domains) {
680: $scrout.="<option name=\"$dom\" ".
681: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
682: }
683: $scrout.="</select>\n";
684:
685: # ------------------------------------------- Compute customized metadata field
686: # $scrout.=<<CUSTOMMETADATA;
687: #<p>
688: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
689: #</font>
690: #For resource-specific metadata, enter in an expression in the form of
691: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
692: #<b>Example:</b> grandmother=75 OR grandfather=85
693: #<br />
694: #CUSTOMMETADATA
695: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
696: # $scrout.=<<CUSTOMSHOW;
697: #<p>
698: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
699: #</font>
700: #Enter in a space-separated list of special metadata fields to show
701: #in a fielded listing for each record result.
702: #<br />
703: #CUSTOMSHOW
704: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
705: $scrout.=<<ENDDOCUMENT;
706: $advanced_buttons
707: </form>
708: </body>
709: </html>
710: ENDDOCUMENT
711: $r->print($scrout);
712: return;
713: }
714: ######################################################################
715: ######################################################################
716:
717: =pod
718:
719: =item &titlefield
720:
721: Inputs: title text
722:
723: Outputs: titletext with font wrapper
724:
725: =cut
726:
727: ######################################################################
728: ######################################################################
729:
730: sub titlefield {
731: my $title=shift;
732: return '<font face="arial" color="#800000">'.$title.'</font>';
733: }
734: ######################################################################
735: ######################################################################
736:
737: =pod
738:
739: =item viewoptiontext
740:
741: Inputs: codename for view option
742:
743: Outputs: displayed text
744:
745: =cut
746:
747: ######################################################################
748: ######################################################################
749:
750: sub viewoptiontext {
751: my $code=shift;
752: my %desc=&Apache::lonlocal::texthash('detailed' => "Detailed Citation View",
753: 'xml' => 'XML/SGML',
754: 'compact' => 'Compact View',
755: 'fielded' => 'Fielded Format',
756: 'summary' => 'Summary View');
757: return $desc{$code};
758: }
759: ######################################################################
760:
761: =pod
762:
763: =item viewoptions
764:
765: Inputs: none
766:
767: Outputs: text for box with view options
768:
769: =cut
770:
771: ######################################################################
772: ######################################################################
773:
774: sub viewoptions {
775: my $scrout="\n\n".'<table bgcolor="#FFFFBB"><tr><th>'.&mt('View Options').'</th><th>'.
776: &mt('Records per Page').'</th></tr><tr><td>';
777: unless ($ENV{'form.viewselect'}) { $ENV{'form.viewselect'}='detailed'; }
778: $scrout.=&Apache::lonmeta::selectbox('viewselect',
779: $ENV{'form.viewselect'},
780: \&viewoptiontext,
781: sort(keys(%Views)));
782: $scrout.='</td><td>';
783: $scrout.=&Apache::lonmeta::selectbox('show',
784: $ENV{'form.show'},
785: undef,
786: (10,20,50,100,1000,10000));
787: $scrout.="</td></tr></table>\n\n";
788: return $scrout;
789: }
790:
791: ######################################################################
792: ######################################################################
793:
794: =pod
795:
796: =item &get_persistent_form_data
797:
798: Inputs: filename of database
799:
800: Outputs: returns undef on database errors.
801:
802: This function is the reverse of &make_persistent() for form data.
803: Retrieve persistent data from %persistent_db. Retrieved items will have their
804: values unescaped. If a form value already exists in $ENV, it will not be
805: overwritten. Form values that are array references may have values appended
806: to them.
807:
808: =cut
809:
810: ######################################################################
811: ######################################################################
812: sub get_persistent_form_data {
813: my $filename = shift;
814: return 0 if (! -e $filename);
815: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
816: &GDBM_READER(),0640));
817: #
818: # These make sure we do not get array references printed out as 'values'.
819: my %arrays_allowed = ('form.domains'=>1);
820: #
821: # Loop through the keys, looking for 'form.'
822: foreach my $name (keys(%persistent_db)) {
823: next if ($name !~ /^form./);
824: # Kludgification begins!
825: if ($name eq 'form.domains' &&
826: $ENV{'form.searchmode'} eq 'basic' &&
827: $ENV{'form.phase'} ne 'disp_basic') {
828: next;
829: }
830: # End kludge (hopefully)
831: next if (exists($ENV{$name}));
832: my @values = map {
833: &Apache::lonnet::unescape($_);
834: } split(',',$persistent_db{$name});
835: next if (@values <1);
836: if ($arrays_allowed{$name}) {
837: $ENV{$name} = [@values];
838: } else {
839: $ENV{$name} = $values[0] if ($values[0]);
840: }
841: }
842: untie (%persistent_db);
843: return 1;
844: }
845:
846: ######################################################################
847: ######################################################################
848:
849: =pod
850:
851: =item &get_persistent_data
852:
853: Inputs: filename of database, ref to array of values to recover.
854:
855: Outputs: array of values. Returns undef on error.
856:
857: This function is the reverse of &make_persistent();
858: Retrieve persistent data from %persistent_db. Retrieved items will have their
859: values unescaped. If the item contains commas (before unescaping), the
860: returned value will be an array pointer.
861:
862: =cut
863:
864: ######################################################################
865: ######################################################################
866: sub get_persistent_data {
867: my $filename = shift;
868: my @Vars = @{shift()};
869: my @Values; # Return array
870: return undef if (! -e $filename);
871: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
872: &GDBM_READER(),0640));
873: foreach my $name (@Vars) {
874: if (! exists($persistent_db{$name})) {
875: push @Values, undef;
876: next;
877: }
878: my @values = map {
879: &Apache::lonnet::unescape($_);
880: } split(',',$persistent_db{$name});
881: if (@values <= 1) {
882: push @Values,$values[0];
883: } else {
884: push @Values,\@values;
885: }
886: }
887: untie (%persistent_db);
888: return @Values;
889: }
890:
891: ######################################################################
892: ######################################################################
893:
894: =pod
895:
896: =item &make_persistent()
897:
898: Inputs: Hash of values to save, filename of persistent database.
899:
900: Store variables away to the %persistent_db.
901: Values will be escaped. Values that are array pointers will have their
902: elements escaped and concatenated in a comma seperated string.
903:
904: =cut
905:
906: ######################################################################
907: ######################################################################
908: sub make_persistent {
909: my %save = %{shift()};
910: my $filename = shift;
911: return undef if (! tie(%persistent_db,'GDBM_File',
912: $filename,&GDBM_WRCREAT(),0640));
913: foreach my $name (keys(%save)) {
914: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
915: # We handle array references, but not recursively.
916: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
917: $persistent_db{$name} = $store;
918: }
919: untie(%persistent_db);
920: return 1;
921: }
922:
923: ######################################################################
924: ######################################################################
925:
926: =pod
927:
928: =item &make_form_data_persistent()
929:
930: Inputs: filename of persistent database.
931:
932: Store most form variables away to the %persistent_db.
933: Values will be escaped. Values that are array pointers will have their
934: elements escaped and concatenated in a comma seperated string.
935:
936: =cut
937:
938: ######################################################################
939: ######################################################################
940: sub make_form_data_persistent {
941: my $r = shift;
942: my $filename = shift;
943: my %save;
944: foreach (keys(%ENV)) {
945: next if (!/^form/ || /submit/);
946: $save{$_} = $ENV{$_};
947: }
948: return &make_persistent(\%save,$filename);
949: }
950:
951: ######################################################################
952: ######################################################################
953:
954: =pod
955:
956: =item &parse_advanced_search()
957:
958: Parse advanced search form and return the following:
959:
960: =over 4
961:
962: =item $query Scalar containing an SQL query.
963:
964: =item $customquery Scalar containing a custom query.
965:
966: =item $customshow Scalar containing commands to show custom metadata.
967:
968: =item $libraries_to_query Reference to array of domains to search.
969:
970: =back
971:
972: =cut
973:
974: ######################################################################
975: ######################################################################
976: sub parse_advanced_search {
977: my ($r,$closebutton,$hidden_fields)=@_;
978: my $fillflag=0;
979: my $pretty_search_string = "<br />\n";
980: # Clean up fields for safety
981: for my $field ('title','author','subject','keywords','url','version',
982: 'creationdatestart_month','creationdatestart_day',
983: 'creationdatestart_year','creationdateend_month',
984: 'creationdateend_day','creationdateend_year',
985: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
986: 'lastrevisiondatestart_year','lastrevisiondateend_month',
987: 'lastrevisiondateend_day','lastrevisiondateend_year',
988: 'notes','abstract','extension','language','owner',
989: 'custommetadata','customshow','category') {
990: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
991: }
992: foreach ('mode','form','element') {
993: # is this required? Hmmm.
994: next unless (exists($ENV{"form.$_"}));
995: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
996: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
997: }
998: # Preprocess the category form element.
999: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1000: ref($ENV{'form.category'}));
1001: #
1002: # Check to see if enough information was filled in
1003: for my $field ('title','author','subject','keywords','url','version',
1004: 'notes','abstract','category','extension','language',
1005: 'owner','custommetadata') {
1006: if (&filled($ENV{"form.$field"})) {
1007: $fillflag++;
1008: }
1009: }
1010: unless ($fillflag) {
1011: &output_blank_field_error($r,$closebutton,'phase=disp_adv',$hidden_fields);
1012: return ;
1013: }
1014: # Turn the form input into a SQL-based query
1015: my $query='';
1016: my @queries;
1017: my $font = '<font color="#800000" face="helvetica">';
1018: # Evaluate logical expression AND/OR/NOT phrase fields.
1019: foreach my $field ('title','author','subject','notes','abstract','url',
1020: 'keywords','version','owner','standards') {
1021: if ($ENV{'form.'.$field}) {
1022: my $searchphrase = $ENV{'form.'.$field};
1023: $pretty_search_string .= $font."$field</font> contains <b>".
1024: $searchphrase."</b>";
1025: if ($ENV{'form.'.$field.'_related'}) {
1026: my @New_Words;
1027: ($searchphrase,@New_Words) = &related_version($searchphrase);
1028: if (@New_Words) {
1029: $pretty_search_string .= " with related words: ".
1030: "<b>@New_Words</b>.";
1031: } else {
1032: $pretty_search_string .= " with no related words.";
1033: }
1034: }
1035: $pretty_search_string .= "<br />\n";
1036: push @queries,&build_SQL_query($field,$searchphrase);
1037: }
1038: }
1039: #
1040: # Make the 'mime' from 'form.category' and 'form.extension'
1041: #
1042: my $searchphrase;
1043: if (exists($ENV{'form.category'}) &&
1044: $ENV{'form.category'} !~ /^\s*$/ &&
1045: $ENV{'form.category'} ne 'any') {
1046: my @extensions = &Apache::loncommon::filecategorytypes
1047: ($ENV{'form.category'});
1048: if (scalar(@extensions) > 0) {
1049: $searchphrase = join(' OR ',@extensions);
1050: }
1051: }
1052: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1053: $searchphrase .= ' OR ' if (defined($searchphrase));
1054: my @extensions = split(/,/,$ENV{'form.extension'});
1055: $searchphrase .= join(' OR ',@extensions);
1056: }
1057: if (defined($searchphrase)) {
1058: push @queries,&build_SQL_query('mime',$searchphrase);
1059: $pretty_search_string .=$font.'mime</font> contains <b>'.
1060: $searchphrase.'</b><br />';
1061: }
1062: #####
1063: # Evaluate option lists
1064: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1065: push @queries,"(language like \"$ENV{'form.language'}\")";
1066: $pretty_search_string.=$font."language</font>= ".
1067: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1068: "<br />\n";
1069: }
1070: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1071: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1072: $pretty_search_string.=$font."copyright</font> = ".
1073: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1074: "<br \>\n";
1075: }
1076: #
1077: # Evaluate date windows
1078: my $datequery=&build_date_queries(
1079: $ENV{'form.creationdatestart_month'},
1080: $ENV{'form.creationdatestart_day'},
1081: $ENV{'form.creationdatestart_year'},
1082: $ENV{'form.creationdateend_month'},
1083: $ENV{'form.creationdateend_day'},
1084: $ENV{'form.creationdateend_year'},
1085: $ENV{'form.lastrevisiondatestart_month'},
1086: $ENV{'form.lastrevisiondatestart_day'},
1087: $ENV{'form.lastrevisiondatestart_year'},
1088: $ENV{'form.lastrevisiondateend_month'},
1089: $ENV{'form.lastrevisiondateend_day'},
1090: $ENV{'form.lastrevisiondateend_year'},
1091: );
1092: # Test to see if date windows are legitimate
1093: if ($datequery=~/^Incorrect/) {
1094: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1095: return ;
1096: } elsif ($datequery) {
1097: # Here is where you would set up pretty_search_string to output
1098: # date query information.
1099: push @queries,$datequery;
1100: }
1101: # Process form information for custom metadata querying
1102: my $customquery=undef;
1103: # if ($ENV{'form.custommetadata'}) {
1104: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1105: # $ENV{'form.custommetadata'}."</b><br />\n";
1106: # $customquery=&build_custommetadata_query('custommetadata',
1107: # $ENV{'form.custommetadata'});
1108: # }
1109: my $customshow=undef;
1110: # if ($ENV{'form.customshow'}) {
1111: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1112: # $ENV{'form.customshow'}."</b><br />\n";
1113: # $customshow=$ENV{'form.customshow'};
1114: # $customshow=~s/[^\w\s]//g;
1115: # my @fields=split(/\s+/,$customshow);
1116: # $customshow=join(" ",@fields);
1117: # }
1118: ## ---------------------------------------------------------------
1119: ## Deal with restrictions to given domains
1120: ##
1121: my ($libraries_to_query,$pretty_domains_string) =
1122: &parse_domain_restrictions();
1123: $pretty_search_string .= $pretty_domains_string."<br />\n";
1124: #
1125: if (@queries) {
1126: $query=join(" AND ",@queries);
1127: $query="select * from metadata where $query";
1128: } elsif ($customquery) {
1129: $query = '';
1130: }
1131: return ($query,$customquery,$customshow,$libraries_to_query,
1132: $pretty_search_string);
1133: }
1134:
1135: sub parse_domain_restrictions {
1136: my $libraries_to_query = undef;
1137: # $ENV{'form.domains'} can be either a scalar or an array reference.
1138: # We need an array.
1139: if (! exists($ENV{'form.domains'})) {
1140: return (undef,'');
1141: }
1142: my @allowed_domains;
1143: if (ref($ENV{'form.domains'})) {
1144: @allowed_domains = @{$ENV{'form.domains'}};
1145: } else {
1146: @allowed_domains = ($ENV{'form.domains'});
1147: }
1148: my %domain_hash = ();
1149: my $pretty_domains_string;
1150: foreach (@allowed_domains) {
1151: $domain_hash{$_}++;
1152: }
1153: if ($domain_hash{'any'}) {
1154: $pretty_domains_string = "In all LON-CAPA domains.";
1155: } else {
1156: if (@allowed_domains > 1) {
1157: $pretty_domains_string = "In LON-CAPA domains:";
1158: } else {
1159: $pretty_domains_string = "In LON-CAPA domain ";
1160: }
1161: foreach (sort @allowed_domains) {
1162: $pretty_domains_string .= "<b>".$_."</b> ";
1163: }
1164: foreach (keys(%Apache::lonnet::libserv)) {
1165: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1166: push @$libraries_to_query,$_;
1167: }
1168: }
1169: }
1170: return ($libraries_to_query,$pretty_domains_string);
1171: }
1172:
1173: ######################################################################
1174: ######################################################################
1175:
1176: =pod
1177:
1178: =item &parse_basic_search()
1179:
1180: Parse the basic search form and return a scalar containing an sql query.
1181:
1182: =cut
1183:
1184: ######################################################################
1185: ######################################################################
1186: sub parse_basic_search {
1187: my ($r,$closebutton)=@_;
1188: # Clean up fields for safety
1189: for my $field ('basicexp') {
1190: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1191: }
1192: foreach ('mode','form','element') {
1193: # is this required? Hmmm.
1194: next unless (exists($ENV{"form.$_"}));
1195: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1196: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1197: }
1198: my ($libraries_to_query,$pretty_domains_string) =
1199: &parse_domain_restrictions();
1200: # Check to see if enough is filled in
1201: unless (&filled($ENV{'form.basicexp'})) {
1202: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1203: return OK;
1204: }
1205: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1206: my $search_string = $ENV{'form.basicexp'};
1207: if ($ENV{'form.related'}) {
1208: my @New_Words;
1209: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1210: if (@New_Words) {
1211: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1212: } else {
1213: $pretty_search_string .= " with no related words.";
1214: }
1215: }
1216: # Build SQL query string based on form page
1217: my $query='';
1218: my $concatarg=join(',',
1219: ('title', 'author', 'subject', 'notes', 'abstract',
1220: 'keywords'));
1221: $concatarg='title' if $ENV{'form.titleonly'};
1222: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1223: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1224: $pretty_search_string .= ' '.$pretty_domains_string;
1225: }
1226: $pretty_search_string .= "<br />\n";
1227: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1228: # &Apache::lonnet::logthis($final_query);
1229: return ($final_query,$pretty_search_string,
1230: $libraries_to_query);
1231: }
1232:
1233:
1234: ######################################################################
1235: ######################################################################
1236:
1237: =pod
1238:
1239: =item &related_version
1240:
1241: Modifies an input string to include related words. Words in the string
1242: are replaced with parenthesized lists of 'OR'd words. For example
1243: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1244:
1245: Note: Using this twice on a string is probably silly.
1246:
1247: =cut
1248:
1249: ######################################################################
1250: ######################################################################
1251: sub related_version {
1252: my $search_string = shift;
1253: my $result = $search_string;
1254: my %New_Words = ();
1255: while ($search_string =~ /(\w+)/cg) {
1256: my $word = $1;
1257: next if (lc($word) =~ /\b(or|and|not)\b/);
1258: my @Words = &Apache::loncommon::get_related_words($word);
1259: @Words = ($#Words>4? @Words[0..4] : @Words);
1260: foreach (@Words) { $New_Words{$_}++;}
1261: my $replacement = join " OR ", ($word,@Words);
1262: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1263: }
1264: return $result,sort(keys(%New_Words));
1265: }
1266:
1267: ######################################################################
1268: ######################################################################
1269:
1270: =pod
1271:
1272: =item &build_SQL_query()
1273:
1274: Builds a SQL query string from a logical expression with AND/OR keywords
1275: using Text::Query and &recursive_SQL_query_builder()
1276:
1277: =cut
1278:
1279: ######################################################################
1280: ######################################################################
1281: sub build_SQL_query {
1282: my ($field_name,$logic_statement)=@_;
1283: my $q=new Text::Query('abc',
1284: -parse => 'Text::Query::ParseAdvanced',
1285: -build => 'Text::Query::Build');
1286: $q->prepare($logic_statement);
1287: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1288: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1289: return $sql_query;
1290: }
1291:
1292: ######################################################################
1293: ######################################################################
1294:
1295: =pod
1296:
1297: =item &build_custommetadata_query()
1298:
1299: Constructs a custom metadata query using a rather heinous regular
1300: expression.
1301:
1302: =cut
1303:
1304: ######################################################################
1305: ######################################################################
1306: sub build_custommetadata_query {
1307: my ($field_name,$logic_statement)=@_;
1308: my $q=new Text::Query('abc',
1309: -parse => 'Text::Query::ParseAdvanced',
1310: -build => 'Text::Query::BuildAdvancedString');
1311: $q->prepare($logic_statement);
1312: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1313: # quick fix to change literal into xml tag-matching
1314: # will eventually have to write a separate builder module
1315: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1316: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1317: /\\<$1\\>?# \<wordone\>
1318: \[\^\\<\]?# [^\<]
1319: \*$2\[\^\\<\]?# *wordtwo[^\<]
1320: \*\\<\\\/$1\\>?# *\<\/wordone\>
1321: /g;
1322: return $matchexp;
1323: }
1324:
1325: ######################################################################
1326: ######################################################################
1327:
1328: =pod
1329:
1330: =item &recursive_SQL_query_build()
1331:
1332: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1333:
1334: =cut
1335:
1336: ######################################################################
1337: ######################################################################
1338: sub recursive_SQL_query_build {
1339: my ($dkey,$pattern)=@_;
1340: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1341: return $pattern unless @matches;
1342: foreach my $match (@matches) {
1343: $match=~/\[ (\w+)\s(.*) \]/;
1344: my ($key,$value)=($1,$2);
1345: my $replacement='';
1346: if ($key eq 'literal') {
1347: $replacement="($dkey LIKE \"\%$value\%\")";
1348: } elsif (lc($key) eq 'not') {
1349: $value=~s/LIKE/NOT LIKE/;
1350: # $replacement="($dkey not like $value)";
1351: $replacement="$value";
1352: } elsif ($key eq 'and') {
1353: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1354: $replacement="($1 AND $2)";
1355: } elsif ($key eq 'or') {
1356: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1357: $replacement="($1 OR $2)";
1358: }
1359: substr($pattern,
1360: index($pattern,$match),
1361: length($match),
1362: $replacement);
1363: }
1364: &recursive_SQL_query_build($dkey,$pattern);
1365: }
1366:
1367: ######################################################################
1368: ######################################################################
1369:
1370: =pod
1371:
1372: =item &build_date_queries()
1373:
1374: Builds a SQL logic query to check time/date entries.
1375: Also reports errors (check for /^Incorrect/).
1376:
1377: =cut
1378:
1379: ######################################################################
1380: ######################################################################
1381: sub build_date_queries {
1382: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1383: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1384: my @queries;
1385: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1386: unless ($cmonth1 and $cday1 and $cyear1 and
1387: $cmonth2 and $cday2 and $cyear2) {
1388: return "Incorrect entry for the creation date. You must specify ".
1389: "a starting month, day, and year and an ending month, ".
1390: "day, and year.";
1391: }
1392: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1393: $cnumeric1+=0;
1394: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1395: $cnumeric2+=0;
1396: if ($cnumeric1>$cnumeric2) {
1397: return "Incorrect entry for the creation date. The starting ".
1398: "date must occur before the ending date.";
1399: }
1400: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1401: "$cyear2-$cmonth2-$cday2 23:59:59')";
1402: push @queries,$cquery;
1403: }
1404: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1405: unless ($lmonth1 and $lday1 and $lyear1 and
1406: $lmonth2 and $lday2 and $lyear2) {
1407: return "Incorrect entry for the last revision date. You must ".
1408: "specify a starting month, day, and year and an ending ".
1409: "month, day, and year.";
1410: }
1411: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1412: $lnumeric1+=0;
1413: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1414: $lnumeric2+=0;
1415: if ($lnumeric1>$lnumeric2) {
1416: return "Incorrect entry for the last revision date. The ".
1417: "starting date must occur before the ending date.";
1418: }
1419: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1420: "$lyear2-$lmonth2-$lday2 23:59:59')";
1421: push @queries,$lquery;
1422: }
1423: if (@queries) {
1424: return join(" AND ",@queries);
1425: }
1426: return '';
1427: }
1428:
1429: ######################################################################
1430: ######################################################################
1431:
1432: =pod
1433:
1434: =item ©right_check()
1435:
1436: =cut
1437:
1438: ######################################################################
1439: ######################################################################
1440: sub copyright_check {
1441: my $Metadata = shift;
1442: # Check copyright tags and skip results the user cannot use
1443: my (undef,undef,$resdom,$resname) = split('/',
1444: $Metadata->{'url'});
1445: # Check for priv
1446: if (($Metadata->{'copyright'} eq 'priv') &&
1447: (($ENV{'user.name'} ne $resname) &&
1448: ($ENV{'user.domain'} ne $resdom))) {
1449: return 0;
1450: }
1451: # Check for domain
1452: if (($Metadata->{'copyright'} eq 'domain') &&
1453: ($ENV{'user.domain'} ne $resdom)) {
1454: return 0;
1455: }
1456: return 1;
1457: }
1458:
1459:
1460: ######################################################################
1461: ######################################################################
1462:
1463: =pod
1464:
1465: =item &ensure_db_and_table
1466:
1467: Ensure we can get lonmysql to connect to the database and the table we
1468: need exists.
1469:
1470: Inputs: $r, table id
1471:
1472: Returns: undef on error, 1 if the table exists.
1473:
1474: =cut
1475:
1476: ######################################################################
1477: ######################################################################
1478: sub ensure_db_and_table {
1479: my ($r,$table) = @_;
1480: ##
1481: ## Sanity check the table id.
1482: ##
1483: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1484: $r->print("Unable to retrieve search results. ".
1485: "Unable to determine the table results were stored in. ".
1486: "</body></html>");
1487: return undef;
1488: }
1489: ##
1490: ## Make sure we can connect and the table exists.
1491: ##
1492: my $connection_result = &Apache::lonmysql::connect_to_db();
1493: if (!defined($connection_result)) {
1494: $r->print("Unable to connect to the MySQL database where your results".
1495: " are stored. </body></html>");
1496: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1497: " connect to database.");
1498: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1499: return undef;
1500: }
1501: my $table_check = &Apache::lonmysql::check_table($table);
1502: if (! defined($table_check)) {
1503: $r->print("A MySQL error has occurred.</form></body></html>");
1504: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1505: " of table ".$table);
1506: return undef;
1507: } elsif (! $table_check) {
1508: $r->print("The table of results could not be found.");
1509: &Apache::lonnet::logthis("The user requested a table, ".$table.
1510: ", that could not be found.");
1511: return undef;
1512: }
1513: return 1;
1514: }
1515:
1516: ######################################################################
1517: ######################################################################
1518:
1519: =pod
1520:
1521: =item &print_sort_form
1522:
1523: =cut
1524:
1525: ######################################################################
1526: ######################################################################
1527: sub print_sort_form {
1528: my ($r,$pretty_query_string) = @_;
1529: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1530: ##
1531: my %SortableFields=&Apache::lonlocal::texthash(
1532: id => 'Default',
1533: title => 'Title',
1534: author => 'Author',
1535: subject => 'Subject',
1536: url => 'URL',
1537: version => 'Version Number',
1538: mime => 'Mime type',
1539: lang => 'Language',
1540: owner => 'Owner/Publisher',
1541: copyright => 'Copyright',
1542: hostname => 'Host',
1543: creationdate => 'Creation Date',
1544: lastrevisiondate => 'Revision Date'
1545: );
1546: ##
1547: my $table = $ENV{'form.table'};
1548: return if (! &ensure_db_and_table($r,$table));
1549: ##
1550: ## Get the number of results
1551: ##
1552: my $total_results = &Apache::lonmysql::number_of_rows($table);
1553: if (! defined($total_results)) {
1554: $r->print("A MySQL error has occurred.</form></body></html>");
1555: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1556: " of rows in table ".$table);
1557: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1558: return;
1559: }
1560: my $result;
1561: $result.=<<END;
1562: <html>
1563: <head>
1564: <script>
1565: function change_sort() {
1566: var newloc = "/adm/searchcat?phase=results";
1567: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1568: newloc += "&sortby=";
1569: newloc += document.forms.statusform.elements.sortby.value;
1570: parent.resultsframe.location= newloc;
1571: }
1572: </script>
1573: <title>Results</title>
1574: </head>
1575: $bodytag
1576: <form name="statusform" action="" method="post">
1577: <input type="hidden" name="Queue" value="" />
1578: END
1579:
1580: #<h2>Sort Results</h2>
1581: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1582: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1583: # foreach (keys(%SortableFields)) {
1584: # $result.="<option name=\"$_\"";
1585: # if ($_ eq $ENV{'form.sortby'}) {
1586: # $result.=" selected ";
1587: # }
1588: # $result.=" >$SortableFields{$_}</option>\n";
1589: # }
1590: # $result.="</select>\n";
1591: my $revise = &revise_button();
1592: $result.=<<END;
1593: <p>
1594: There are $total_results matches to your query. $revise
1595: </p><p>
1596: Search:$pretty_query_string
1597: </p>
1598: </form>
1599: </body>
1600: </html>
1601: END
1602: $r->print($result);
1603: return;
1604: }
1605:
1606: #####################################################################
1607: #####################################################################
1608:
1609: =pod
1610:
1611: =item MySQL Table Description
1612:
1613: MySQL table creation requires a precise description of the data to be
1614: stored. The use of the correct types to hold data is vital to efficient
1615: storage and quick retrieval of records. The columns must be described in
1616: the following format:
1617:
1618: =cut
1619:
1620: #####################################################################
1621: #####################################################################
1622:
1623: my @Datatypes =
1624: ( { name => 'id',
1625: type => 'MEDIUMINT',
1626: restrictions => 'UNSIGNED NOT NULL',
1627: primary_key => 'yes',
1628: auto_inc => 'yes' },
1629: { name => 'title', type=>'TEXT'},
1630: { name => 'author', type=>'TEXT'},
1631: { name => 'subject', type=>'TEXT'},
1632: { name => 'url', type=>'TEXT', restrictions => 'NOT NULL' },
1633: { name => 'keywords', type=>'TEXT'},
1634: { name => 'version', type=>'TEXT'},
1635: { name => 'notes', type=>'TEXT'},
1636: { name => 'abstract', type=>'TEXT'},
1637: { name => 'mime', type=>'TEXT'},
1638: { name => 'language', type=>'TEXT'},
1639: { name => 'owner', type=>'TEXT'},
1640: { name => 'copyright', type=>'TEXT'},
1641: { name => 'dependencies', type=>'TEXT'},
1642: { name => 'modifyinguser', type=>'TEXT'},
1643: { name => 'authorspace', type=>'TEXT'},
1644: { name => 'lowestgradelevel', type=>'INT'},
1645: { name => 'highestgradelevel', type=>'INT'},
1646: { name => 'standards', type=>'TEXT'},
1647: { name => 'count', type=>'INT'},
1648: { name => 'course', type=>'INT'},
1649: { name => 'course_list', type=>'TEXT'},
1650: { name => 'goto', type=>'INT'},
1651: { name => 'goto_list', type=>'TEXT'},
1652: { name => 'comefrom', type=>'INT'},
1653: { name => 'comefrom_list', type=>'TEXT'},
1654: { name => 'sequsage', type=>'INT'},
1655: { name => 'sequsage_list', type=>'TEXT'},
1656: { name => 'stdno', type=>'INT'},
1657: { name => 'stdno_list', type=>'TEXT'},
1658: { name => 'avetries', type=>'FLOAT'},
1659: { name => 'avetries_list', type=>'TEXT'},
1660: { name => 'difficulty', type=>'FLOAT'},
1661: { name => 'difficulty_list', type=>'TEXT'},
1662: { name => 'clear', type=>'FLOAT'},
1663: { name => 'technical', type=>'FLOAT'},
1664: { name => 'correct', type=>'FLOAT'},
1665: { name => 'helpful', type=>'FLOAT'},
1666: { name => 'depth', type=>'FLOAT'},
1667: { name => 'hostname', type=> 'TEXT'},
1668: #--------------------------------------------------
1669: { name => 'creationdate', type=>'DATETIME'},
1670: { name => 'lastrevisiondate', type=>'DATETIME'},
1671: #--------------------------------------------------
1672: );
1673:
1674: my @Fullindicies =
1675: qw/title/;
1676: # qw/title author subject abstract mime language owner copyright/;
1677:
1678: ######################################################################
1679: ######################################################################
1680:
1681: =pod
1682:
1683: =item &create_results_table()
1684:
1685: Creates the table of search results by calling lonmysql. Stores the
1686: table id in $ENV{'form.table'}
1687:
1688: Inputs: none.
1689:
1690: Returns: the identifier of the table on success, undef on error.
1691:
1692: =cut
1693:
1694: ######################################################################
1695: ######################################################################
1696: sub create_results_table {
1697: my $table = &Apache::lonmysql::create_table
1698: ( { columns => \@Datatypes,
1699: FULLTEXT => [{'columns' => \@Fullindicies},],
1700: } );
1701: if (defined($table)) {
1702: $ENV{'form.table'} = $table;
1703: return $table;
1704: }
1705: return undef; # Error...
1706: }
1707:
1708: ######################################################################
1709: ######################################################################
1710:
1711: =pod
1712:
1713: =item Search Status update functions
1714:
1715: Each of the following functions changes the values of one of the
1716: input fields used to display the search status to the user. The names
1717: should be explanatory.
1718:
1719: Inputs: Apache request handler ($r), text to display.
1720:
1721: Returns: Nothing.
1722:
1723: =over 4
1724:
1725: =item &update_count_status()
1726:
1727: =item &update_status()
1728:
1729: =item &update_seconds()
1730:
1731: =back
1732:
1733: =cut
1734:
1735: ######################################################################
1736: ######################################################################
1737: sub update_count_status {
1738: my ($r,$text) = @_;
1739: $text =~ s/\'/\\\'/g;
1740: $r->print
1741: ("<script>document.statusform.count.value = ' $text'</script>\n");
1742: $r->rflush();
1743: }
1744:
1745: sub update_status {
1746: my ($r,$text) = @_;
1747: $text =~ s/\'/\\\'/g;
1748: $r->print
1749: ("<script>document.statusform.status.value = ' $text'</script>\n");
1750: $r->rflush();
1751: }
1752:
1753: sub update_seconds {
1754: my ($r,$text) = @_;
1755: $text =~ s/\'/\\\'/g;
1756: $r->print
1757: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1758: $r->rflush();
1759: }
1760:
1761: ######################################################################
1762: ######################################################################
1763:
1764: =pod
1765:
1766: =item &revise_button
1767:
1768: Inputs: None
1769:
1770: Returns: html string for a 'revise search' button.
1771:
1772: =cut
1773:
1774: ######################################################################
1775: ######################################################################
1776: sub revise_button {
1777: my $revise_phase = 'disp_basic';
1778: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1779: my $newloc = '/adm/searchcat'.
1780: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1781: '&cleargroupsort=1'.
1782: '&phase='.$revise_phase;
1783: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1784: qq{ onClick="parent.location='$newloc';" /> };
1785: return $result;
1786: }
1787:
1788: ######################################################################
1789: ######################################################################
1790:
1791: =pod
1792:
1793: =item &run_search
1794:
1795: =cut
1796:
1797: ######################################################################
1798: ######################################################################
1799: sub run_search {
1800: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1801: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1802: my $connection = $r->connection;
1803: #
1804: # Timing variables
1805: #
1806: my $starttime = time;
1807: my $max_time = 30; # seconds for the search to complete
1808: #
1809: # Print run_search header
1810: #
1811: $r->print(<<END);
1812: <html>
1813: <head><title>Search Status</title></head>
1814: $bodytag
1815: <form name="statusform" action="" method="post">
1816: <input type="hidden" name="Queue" value="" />
1817: END
1818: # Check to see if $pretty_string has more than one carriage return.
1819: # Assume \n s are following <br /> s and truncate the value.
1820: # (there is probably a better way)...
1821: my @Lines = split /<br \/>/,$pretty_string;
1822: if (@Lines > 2) {
1823: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1824: }
1825: $r->print(&mt("Search").": ".$pretty_string);
1826: $r->rflush();
1827: #
1828: # Determine the servers we need to contact.
1829: #
1830: my @Servers_to_contact;
1831: if (defined($serverlist)) {
1832: if (ref($serverlist) eq 'ARRAY') {
1833: @Servers_to_contact = @$serverlist;
1834: } else {
1835: @Servers_to_contact = ($serverlist);
1836: }
1837: } else {
1838: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1839: }
1840: my %Server_status;
1841: my $table =$ENV{'form.table'};
1842: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1843: $r->print("Unable to determine table id to store search results in.".
1844: "The search has been aborted.</body></html>");
1845: return;
1846: }
1847: my $table_status = &Apache::lonmysql::check_table($table);
1848: if (! defined($table_status)) {
1849: $r->print("Unable to determine status of table.</body></html>");
1850: &Apache::lonnet::logthis("Bogus table id of $table for ".
1851: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1852: &Apache::lonnet::logthis("lonmysql error = ".
1853: &Apache::lonmysql::get_error());
1854: return;
1855: }
1856: if (! $table_status) {
1857: $r->print("The table id,$table, we tried to use is invalid.".
1858: "The search has been aborted.</body></html>");
1859: return;
1860: }
1861: ##
1862: ## Prepare for the big loop.
1863: ##
1864: my $hitcountsum;
1865: my $server;
1866: my $status;
1867: my $revise = &revise_button();
1868: $r->print(<<END);
1869: <table>
1870: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1871: <tr>
1872: <td><input type="text" name="status" value="" size="30" /></td>
1873: <td><input type="text" name="count" value="" size="10" /></td>
1874: <td><input type="text" name="seconds" value="" size="8" /></td>
1875: <td>$revise</td>
1876: </tr>
1877: </table>
1878: </form>
1879: END
1880: $r->rflush();
1881: my $time_remaining = $max_time - (time - $starttime) ;
1882: my $last_time = $time_remaining;
1883: &update_seconds($r,$time_remaining);
1884: &update_status($r,'contacting '.$Servers_to_contact[0]);
1885: while (($time_remaining > 0) &&
1886: ((@Servers_to_contact) || keys(%Server_status))) {
1887: # Send out a search request if it needs to be done.
1888: if (@Servers_to_contact) {
1889: # Contact one server
1890: my $server = shift(@Servers_to_contact);
1891: &update_status($r,&mt('contacting').' '.$server);
1892: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1893: $customshow,[$server]);
1894: ($server) = keys(%$reply);
1895: $Server_status{$server} = $reply->{$server};
1896: } else {
1897: # wait a sec. to give time for files to be written
1898: # This sleep statement is here instead of outside the else
1899: # block because we do not want to pause if we have servers
1900: # left to contact.
1901: if (scalar (keys(%Server_status))) {
1902: &update_status($r,
1903: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1904: }
1905: sleep(1);
1906: }
1907: #
1908: #
1909: # Loop through the servers we have contacted but do not
1910: # have results from yet, looking for results.
1911: while (my ($server,$status) = each(%Server_status)) {
1912: last if ($connection->aborted());
1913: if ($status eq 'con_lost') {
1914: delete ($Server_status{$server});
1915: next;
1916: }
1917: $status=~/^([\.\w]+)$/;
1918: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1919: if (-e $datafile && ! -e "$datafile.end") {
1920: &update_status($r,&mt('Receiving results from').' '.$server);
1921: next;
1922: }
1923: last if ($connection->aborted());
1924: if (-e "$datafile.end") {
1925: &update_status($r,&mt('Reading results from').' '.$server);
1926: if (-z "$datafile") {
1927: delete($Server_status{$server});
1928: next;
1929: }
1930: my $fh;
1931: if (!($fh=Apache::File->new($datafile))) {
1932: $r->print("Unable to open search results file for ".
1933: "server $server. Omitting from search");
1934: delete($Server_status{$server});
1935: next;
1936: }
1937: # Read in the whole file.
1938: while (my $result = <$fh>) {
1939: last if ($connection->aborted());
1940: # handle custom fields? Someday we will!
1941: chomp($result);
1942: next unless $result;
1943: # Parse the result.
1944: my %Fields = &parse_raw_result($result,$server);
1945: $Fields{'hostname'} = $server;
1946: next if (! ©right_check(\%Fields));
1947: # Store the result in the mysql database
1948: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1949: if (! defined($result)) {
1950: $r->print(&Apache::lonmysql::get_error());
1951: }
1952: # $r->print(&Apache::lonmysql::get_debug());
1953: $hitcountsum ++;
1954: $time_remaining = $max_time - (time - $starttime) ;
1955: if ($last_time - $time_remaining > 0) {
1956: &update_seconds($r,$time_remaining);
1957: $last_time = $time_remaining;
1958: }
1959: if ($hitcountsum % 50 == 0) {
1960: &update_count_status($r,$hitcountsum);
1961: }
1962: } # End of foreach (@results)
1963: $fh->close();
1964: # $server is only deleted if the results file has been
1965: # found and (successfully) opened. This may be a bad idea.
1966: delete($Server_status{$server});
1967: }
1968: last if ($connection->aborted());
1969: &update_count_status($r,$hitcountsum);
1970: }
1971: last if ($connection->aborted());
1972: # Finished looping through the servers
1973: $starttime = time if (@Servers_to_contact);
1974: $time_remaining = $max_time - (time - $starttime) ;
1975: if ($last_time - $time_remaining > 0) {
1976: $last_time = $time_remaining;
1977: &update_seconds($r,$time_remaining);
1978: }
1979: }
1980: &update_status($r,&mt('Search Complete').$server);
1981: &update_seconds($r,0);
1982: &Apache::lonmysql::disconnect_from_db();
1983: # We have run out of time or run out of servers to talk to and
1984: # results to get.
1985: $r->print("</body></html>");
1986: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
1987: $r->print("<script>".
1988: "window.location='/adm/searchcat?".
1989: "phase=sort&".
1990: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
1991: "</script>");
1992: }
1993: return;
1994: }
1995:
1996: ######################################################################
1997: ######################################################################
1998: =pod
1999:
2000: =item &prev_next_buttons
2001:
2002: =cut
2003:
2004: ######################################################################
2005: ######################################################################
2006: sub prev_next_buttons {
2007: my ($current_min,$show,$total,$parms) = @_;
2008: return '' if ($show eq 'all'); # No links if you get them all at once.
2009: my $links;
2010: ##
2011: ## Prev
2012: my $prev_min = $current_min - $show;
2013: $prev_min = 1 if $prev_min < 1;
2014: if ($prev_min < $current_min) {
2015: $links .= qq{
2016: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2017: };
2018: } else {
2019: $links .= 'prev';
2020: }
2021: ##
2022: ## Pages.... Someday.
2023: ##
2024: $links .= qq{
2025: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2026: };
2027: ##
2028: ## Next
2029: my $next_min = $current_min + $show;
2030: $next_min = $current_min if ($next_min > $total);
2031: if ($next_min != $current_min) {
2032: $links .= qq{
2033: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2034: };
2035: } else {
2036: $links .= ' next';
2037: }
2038: return $links;
2039: }
2040: ######################################################################
2041: ######################################################################
2042:
2043: =pod
2044:
2045: =item &display_results
2046:
2047: =cut
2048:
2049: ######################################################################
2050: ######################################################################
2051: sub display_results {
2052: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2053: my $connection = $r->connection;
2054: $r->print(&search_results_header($importbutton,$closebutton));
2055: ##
2056: ## Set viewing function
2057: ##
2058: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2059: if (!defined($viewfunction)) {
2060: $r->print("Internal Error - Bad view selected.\n");
2061: $r->rflush();
2062: return;
2063: }
2064: ##
2065: ## $checkbox_num is a count of the number of checkboxes output on the
2066: ## page this is used only during catalogmode=groupsearch.
2067: my $checkbox_num = 0;
2068: ##
2069: ## Get the catalog controls setup
2070: ##
2071: my $action = "/adm/searchcat?phase=results";
2072: ##
2073: ## Deal with groupsearch
2074: ##
2075: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2076: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2077: &GDBM_WRCREAT(),0640)) {
2078: $r->print('Unable to store import results.</form></body></html>');
2079: $r->rflush();
2080: return;
2081: }
2082: }
2083: ##
2084: ## Prepare the table for querying
2085: ##
2086: my $table = $ENV{'form.table'};
2087: return if (! &ensure_db_and_table($r,$table));
2088: ##
2089: ## Get the number of results
2090: ##
2091: my $total_results = &Apache::lonmysql::number_of_rows($table);
2092: if (! defined($total_results)) {
2093: $r->print("A MySQL error has occurred.</form></body></html>");
2094: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2095: " of rows in table ".$table);
2096: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2097: return;
2098: }
2099: ##
2100: ## Determine how many results we need to get
2101: ##
2102: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2103: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2104: my $min = $ENV{'form.start'};
2105: my $max;
2106: if ($ENV{'form.show'} eq 'all') {
2107: $max = $total_results ;
2108: } else {
2109: $max = $min + $ENV{'form.show'} - 1;
2110: $max = $total_results if ($max > $total_results);
2111: }
2112: ##
2113: ## Output links (if necessary) for 'prev' and 'next' pages.
2114: ##
2115: $r->print
2116: ('<center>'.
2117: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2118: "table=".$ENV{'form.table'}.
2119: "&phase=results".
2120: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2121: ."</center>\n"
2122: );
2123: if ($total_results == 0) {
2124: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2125: '<h3>'.&mt('There are currently no results').'.</h3>'.
2126: "</form></body></html>");
2127: return;
2128: } else {
2129: $r->print
2130: ("<center>Results $min to $max out of $total_results</center>\n");
2131: }
2132: ##
2133: ## Get results from MySQL table
2134: ##
2135: my @Results = &Apache::lonmysql::get_rows($table,
2136: 'id>='.$min.' AND id<='.$max);
2137: ##
2138: ## Loop through the results and output them.
2139: ##
2140: foreach my $row (@Results) {
2141: if ($connection->aborted()) {
2142: &cleanup();
2143: return;
2144: }
2145: my %Fields = %{&parse_row(@$row)};
2146: my $output="<p>\n";
2147: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2148: $Fields{'id'},$checkbox_num++);
2149: # Render the result into html
2150: $output.= &$viewfunction($prefix,%Fields);
2151: # Print them out as they come in.
2152: $r->print($output);
2153: $r->rflush();
2154: }
2155: if (@Results < 1) {
2156: $r->print(&mt("There were no results matching your query"));
2157: } else {
2158: $r->print
2159: ('<center>'.
2160: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2161: "table=".$ENV{'form.table'}.
2162: "&phase=results".
2163: "&persistent_db_id=".
2164: $ENV{'form.persistent_db_id'})
2165: ."</center>\n"
2166: );
2167: }
2168: $r->print("</form></body></html>");
2169: $r->rflush();
2170: untie %groupsearch_db if (tied(%groupsearch_db));
2171: return;
2172: }
2173:
2174: ######################################################################
2175: ######################################################################
2176:
2177: =pod
2178:
2179: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2180:
2181: Returns html needed for the various catalog modes. Gets inputs from
2182: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2183:
2184: =cut
2185:
2186: ######################################################################
2187: ######################################################################
2188: sub catalogmode_output {
2189: my $output = '';
2190: my ($title,$url,$fnum,$checkbox_num) = @_;
2191: if ($ENV{'form.catalogmode'} eq 'interactive') {
2192: $title=~ s/\'/\\\'/g;
2193: if ($ENV{'form.catalogmode'} eq 'interactive') {
2194: $output.=<<END
2195: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2196: onClick="javascript:select_data('$title','$url')">
2197: </font>
2198: END
2199: }
2200: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2201: $groupsearch_db{"pre_${fnum}_link"}=$url;
2202: $groupsearch_db{"pre_${fnum}_title"}=$title;
2203: $output.=<<END;
2204: <font size='-1'>
2205: <input type="checkbox" name="returnvalues" value="SELECT"
2206: onClick="javascript:queue($checkbox_num,$fnum)" />
2207: </font>
2208: END
2209: }
2210: return $output;
2211: }
2212: ######################################################################
2213: ######################################################################
2214:
2215: =pod
2216:
2217: =item &parse_row
2218:
2219: Parse a row returned from the database.
2220:
2221: =cut
2222:
2223: ######################################################################
2224: ######################################################################
2225: sub parse_row {
2226: my @Row = @_;
2227: my %Fields;
2228: for (my $i=0;$i<=$#Row;$i++) {
2229: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2230: }
2231: $Fields{'language'} =
2232: &Apache::loncommon::languagedescription($Fields{'language'});
2233: $Fields{'copyrighttag'} =
2234: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2235: $Fields{'mimetag'} =
2236: &Apache::loncommon::filedescription($Fields{'mime'});
2237: return \%Fields;
2238: }
2239:
2240: ###########################################################
2241: ###########################################################
2242:
2243: =pod
2244:
2245: =item &parse_raw_result()
2246:
2247: Takes a line from the file of results and parse it. Returns a hash
2248: with keys according to column labels
2249:
2250: In addition, the following tags are set by calling the appropriate
2251: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2252:
2253: The 'title' field is set to "Untitled" if the title field is blank.
2254:
2255: 'abstract' and 'keywords' are truncated to 200 characters.
2256:
2257: =cut
2258:
2259: ###########################################################
2260: ###########################################################
2261: sub parse_raw_result {
2262: my ($result,$hostname) = @_;
2263: # conclude from self to others regarding fields
2264: my %Fields=&Apache::lonmeta::metadata_col_to_hash(
2265: map {
2266: &Apache::lonnet::unescape($_);
2267: } (split(/\,/,$result))
2268: );
2269: return %Fields;
2270: }
2271:
2272: ###########################################################
2273: ###########################################################
2274:
2275: =pod
2276:
2277: =item &handle_custom_fields()
2278:
2279: =cut
2280:
2281: ###########################################################
2282: ###########################################################
2283: sub handle_custom_fields {
2284: my @results = @{shift()};
2285: my $customshow='';
2286: my $extrashow='';
2287: my @customfields;
2288: if ($ENV{'form.customshow'}) {
2289: $customshow=$ENV{'form.customshow'};
2290: $customshow=~s/[^\w\s]//g;
2291: my @fields=map {
2292: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2293: } split(/\s+/,$customshow);
2294: @customfields=split(/\s+/,$customshow);
2295: if ($customshow) {
2296: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2297: }
2298: }
2299: my $customdata='';
2300: my %customhash;
2301: foreach my $result (@results) {
2302: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2303: my $tmp=$result;
2304: $tmp=~s/^custom\=//;
2305: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2306: } split(/\,/,$tmp);
2307: $customhash{$k}=$v;
2308: }
2309: }
2310: return ($extrashow,\@customfields,\%customhash);
2311: }
2312:
2313: ######################################################################
2314: ######################################################################
2315:
2316: =pod
2317:
2318: =item &search_results_header
2319:
2320: Output the proper html headers and javascript code to deal with different
2321: calling modes.
2322:
2323: Takes most inputs directly from %ENV, except $mode.
2324:
2325: =over 4
2326:
2327: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2328:
2329: =back
2330:
2331: The following environment variables are checked:
2332:
2333: =over 4
2334:
2335: =item 'form.catalogmode'
2336:
2337: Checked for 'interactive' and 'groupsearch'.
2338:
2339: =item 'form.mode'
2340:
2341: Checked for existance & 'edit' mode.
2342:
2343: =item 'form.form'
2344:
2345: Contains the name of the form that has the input fields to set
2346:
2347: =item 'form.element'
2348:
2349: the name of the input field to put the URL into
2350:
2351: =item 'form.titleelement'
2352:
2353: the name of the input field to put the title into
2354:
2355: =back
2356:
2357: =cut
2358:
2359: ######################################################################
2360: ######################################################################
2361: sub search_results_header {
2362: my ($importbutton,$closebutton) = @_;
2363: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2364: my $result = '';
2365: # output beginning of search page
2366: # conditional output of script functions dependent on the mode in
2367: # which the search was invoked
2368: if ($ENV{'form.catalogmode'} eq 'interactive'){
2369: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2370: $result.=<<SCRIPT;
2371: <script type="text/javascript">
2372: function select_data(title,url) {
2373: changeTitle(title);
2374: changeURL(url);
2375: parent.close();
2376: }
2377: function changeTitle(val) {
2378: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2379: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2380: }
2381: }
2382: function changeURL(val) {
2383: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2384: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2385: }
2386: }
2387: </script>
2388: SCRIPT
2389: } elsif ($ENV{'form.mode'} eq 'edit') {
2390: my $form = $ENV{'form.form'};
2391: my $element = $ENV{'form.element'};
2392: my $titleelement = $ENV{'form.titleelement'};
2393: my $changetitle;
2394: if (!$titleelement) {
2395: $changetitle='function changeTitle(val) {}';
2396: } else {
2397: $changetitle=<<END;
2398: function changeTitle(val) {
2399: if (parent.targetwin.document) {
2400: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2401: } else {
2402: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2403: alert("Unable to transfer data to "+url);
2404: }
2405: }
2406: END
2407: }
2408:
2409: $result.=<<SCRIPT;
2410: <script type="text/javascript">
2411: function select_data(title,url) {
2412: changeURL(url);
2413: changeTitle(title);
2414: parent.close();
2415: }
2416: $changetitle
2417: function changeURL(val) {
2418: if (parent.targetwin.document) {
2419: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2420: } else {
2421: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2422: alert("Unable to transfer data to "+url);
2423: }
2424: }
2425: </script>
2426: SCRIPT
2427: }
2428: }
2429: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2430: <script type="text/javascript">
2431: function queue(checkbox_num,val) {
2432: if (document.forms.results.returnvalues.length != "undefined" &&
2433: typeof(document.forms.results.returnvalues.length) == "number") {
2434: if (document.forms.results.returnvalues[checkbox_num].checked) {
2435: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2436: } else {
2437: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2438: }
2439: } else {
2440: if (document.forms.results.returnvalues.checked) {
2441: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2442: } else {
2443: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2444: }
2445: }
2446: }
2447: function select_group() {
2448: parent.window.location=
2449: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2450: parent.statusframe.document.forms.statusform.elements.Queue.value;
2451: }
2452: </script>
2453: SCRIPT
2454: $result.=<<END;
2455: </head>
2456: $bodytag
2457: <form name="results" method="post" action="" >
2458: <input type="hidden" name="Queue" value="" />
2459: $importbutton
2460: END
2461: return $result;
2462: }
2463:
2464: ######################################################################
2465: ######################################################################
2466: sub search_status_header {
2467: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2468: return <<ENDSTATUS;
2469: <html><head><title>Search Status</title></head>
2470: $bodytag
2471: <h3>Search Status</h3>
2472: Sending search request to LON-CAPA servers.<br />
2473: ENDSTATUS
2474: }
2475:
2476: sub results_link {
2477: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2478: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2479: my $results_link = $basic_link."&phase=results".
2480: "&pause=1"."&start=1";
2481: return $results_link;
2482: }
2483:
2484: ######################################################################
2485: ######################################################################
2486: sub print_frames_interface {
2487: my $r = shift;
2488: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2489: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2490: my $run_search_link = $basic_link."&phase=run_search";
2491: my $results_link = &results_link();
2492: my $result = <<"ENDFRAMES";
2493: <html>
2494: <head>
2495: <script>
2496: var targetwin = opener;
2497: var queue = '';
2498: </script>
2499: <title>LON-CAPA Digital Library Search Results</title>
2500: </head>
2501: <frameset rows="150,*">
2502: <frame name="statusframe" src="$run_search_link">
2503: <frame name="resultsframe" src="$results_link">
2504: </frameset>
2505: </html>
2506: ENDFRAMES
2507:
2508: $r->print($result);
2509: return;
2510: }
2511:
2512: ######################################################################
2513: ######################################################################
2514:
2515: =pod
2516:
2517: =item Metadata Viewing Functions
2518:
2519: Output is a HTML-ified string.
2520: Input arguments are title, author, subject, url, keywords, version,
2521: notes, short abstract, mime, language, creation date,
2522: last revision date, owner, copyright, hostname, and
2523: extra custom metadata to show.
2524:
2525: =over 4
2526:
2527: =item &detailed_citation_view()
2528:
2529: =cut
2530:
2531: ######################################################################
2532: ######################################################################
2533: sub detailed_citation_view {
2534: my ($prefix,%values) = @_;
2535: my $icon=&Apache::loncommon::icon($values{'url'});
2536: my $result=<<END;
2537: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2538: target='search_preview'>$values{'title'}</a></b>
2539: <p>
2540: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2541:
2542: <b>Subject: </b> $values{'subject'}<br />
2543: <b>Keyword(s): </b> $values{'keywords'}<br />
2544: <b>Notes: </b> $values{'notes'}<br />
2545: <b>MIME Type: </b> $values{'mimetag'}<br />
2546: <b>Language: </b> $values{'language'}<br />
2547: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2548: </p>
2549: $values{'extrashow'}
2550: <p>
2551: $values{'shortabstract'}
2552: </p>
2553: <hr align='left' width='200' noshade />
2554: END
2555: return $result;
2556: }
2557:
2558: ######################################################################
2559: ######################################################################
2560:
2561: =pod
2562:
2563: =item &summary_view()
2564:
2565: =cut
2566: ######################################################################
2567: ######################################################################
2568: sub summary_view {
2569: my ($prefix,%values) = @_;
2570: my $icon=&Apache::loncommon::icon($values{'url'});
2571: my $result=<<END;
2572: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2573: target='search_preview'>$values{'author'}</a><br />
2574: $values{'title'}<br />
2575: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2576: $values{'copyrighttag'}<br />
2577: $values{'extrashow'}
2578: </p>
2579: <hr align='left' width='200' noshade />
2580: END
2581: return $result;
2582: }
2583:
2584: ######################################################################
2585: ######################################################################
2586:
2587: =pod
2588:
2589: =item &compact_view()
2590:
2591: =cut
2592:
2593: ######################################################################
2594: ######################################################################
2595: sub compact_view {
2596: my ($prefix,%values) = @_;
2597: my $icon=&Apache::loncommon::icon($values{'url'});
2598: my $result=<<END;
2599: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2600: $values{'title'}</a>
2601: <b>$values{'author'}</b><br />
2602: END
2603: return $result;
2604: }
2605:
2606:
2607: ######################################################################
2608: ######################################################################
2609:
2610: =pod
2611:
2612: =item &fielded_format_view()
2613:
2614: =cut
2615:
2616: ######################################################################
2617: ######################################################################
2618: sub fielded_format_view {
2619: my ($prefix,%values) = @_;
2620: my $icon=&Apache::loncommon::icon($values{'url'});
2621: my $result=<<END;
2622: $prefix <img src="$icon" />
2623: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2624: target='search_preview'>$values{'url'}</a>
2625: <br />
2626: <b>Title:</b> $values{'title'}<br />
2627: <b>Author(s):</b> $values{'author'}<br />
2628: <b>Subject:</b> $values{'subject'}<br />
2629: <b>Keyword(s):</b> $values{'keywords'}<br />
2630: <b>Notes:</b> $values{'notes'}<br />
2631: <b>MIME Type:</b> $values{'mimetag'}<br />
2632: <b>Language:</b> $values{'language'}<br />
2633: <b>Creation Date:</b> $values{'creationdate'}<br />
2634: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2635: <b>Publisher/Owner:</b> $values{'owner'}<br />
2636: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2637: <b>Repository Location:</b> $values{'hostname'}<br />
2638: <b>Abstract:</b> $values{'shortabstract'}<br />
2639: $values{'extrashow'}
2640: </p>
2641: <hr align='left' width='200' noshade />
2642: END
2643: return $result;
2644: }
2645:
2646: ######################################################################
2647: ######################################################################
2648:
2649: =pod
2650:
2651: =item &xml_sgml_view()
2652:
2653: =back
2654:
2655: =cut
2656:
2657: ######################################################################
2658: ######################################################################
2659: sub xml_sgml_view {
2660: my ($prefix,%values) = @_;
2661: my $result=<<END;
2662: $prefix
2663: <pre>
2664: <LonCapaResource>
2665: <url>$values{'url'}</url>
2666: <title>$values{'title'}</title>
2667: <author>$values{'author'}</author>
2668: <subject>$values{'subject'}</subject>
2669: <keywords>$values{'keywords'}</keywords>
2670: <notes>$values{'notes'}</notes>
2671: <mimeInfo>
2672: <mime>$values{'mime'}</mime>
2673: <mimetag>$values{'mimetag'}</mimetag>
2674: </mimeInfo>
2675: <languageInfo>
2676: <language>$values{'language'}</language>
2677: <languagetag>$values{'languagetag'}</languagetag>
2678: </languageInfo>
2679: <creationdate>$values{'creationdate'}</creationdate>
2680: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2681: <owner>$values{'owner'}</owner>
2682: <copyrightInfo>
2683: <copyright>$values{'copyright'}</copyright>
2684: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2685: </copyrightInfo>
2686: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2687: <shortabstract>$values{'shortabstract'}</shortabstract>
2688: </LonCapaResource>
2689: </pre>
2690: $values{'extrashow'}
2691: <hr align='left' width='200' noshade />
2692: END
2693: return $result;
2694: }
2695:
2696: ######################################################################
2697: ######################################################################
2698:
2699: =pod
2700:
2701: =item &filled() see if field is filled.
2702:
2703: =cut
2704:
2705: ######################################################################
2706: ######################################################################
2707: sub filled {
2708: my ($field)=@_;
2709: if ($field=~/\S/ && $field ne 'any') {
2710: return 1;
2711: }
2712: else {
2713: return 0;
2714: }
2715: }
2716:
2717: ######################################################################
2718: ######################################################################
2719:
2720: =pod
2721:
2722: =item &output_blank_field_error()
2723:
2724: Output a complete page that indicates the user has not filled in enough
2725: information to do a search.
2726:
2727: Inputs: $r (Apache request handle), $closebutton, $parms.
2728:
2729: Returns: nothing
2730:
2731: $parms is extra information to include in the 'Revise search request' link.
2732:
2733: =cut
2734:
2735: ######################################################################
2736: ######################################################################
2737: sub output_blank_field_error {
2738: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2739: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2740: # make query information persistent to allow for subsequent revision
2741: $r->print(<<BEGINNING);
2742: <html>
2743: <head>
2744: <title>The LearningOnline Network with CAPA</title>
2745: BEGINNING
2746: $r->print(<<RESULTS);
2747: </head>
2748: $bodytag
2749: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2750: <h1>Search Catalog</h1>
2751: <form method="post" action="/adm/searchcat">
2752: $hidden_fields
2753: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2754: >Revise search request</a>
2755: $closebutton
2756: <hr />
2757: <h3>Unactionable search query.</h3>
2758: <p>
2759: You did not fill in enough information for the search to be started.
2760: You need to fill in relevant fields on the search page in order
2761: for a query to be processed.
2762: </p>
2763: </body>
2764: </html>
2765: RESULTS
2766: }
2767:
2768: ######################################################################
2769: ######################################################################
2770:
2771: =pod
2772:
2773: =item &output_date_error()
2774:
2775: Output a full html page with an error message.
2776:
2777: Inputs:
2778:
2779: $r, the request pointer.
2780: $message, the error message for the user.
2781: $closebutton, the specialized close button needed for groupsearch.
2782:
2783: =cut
2784:
2785: ######################################################################
2786: ######################################################################
2787: sub output_date_error {
2788: my ($r,$message,$closebutton,$hidden_fields)=@_;
2789: # make query information persistent to allow for subsequent revision
2790: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2791: $r->print(<<RESULTS);
2792: <html>
2793: <head>
2794: <title>The LearningOnline Network with CAPA</title>
2795: </head>
2796: $bodytag
2797: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2798: <h1>Search Catalog</h1>
2799: <form method="post" action="/adm/searchcat">
2800: $hidden_fields
2801: <input type='button' value='Revise search request'
2802: onClick='this.form.submit();' />
2803: $closebutton
2804: <hr />
2805: <h3>Error</h3>
2806: <p>
2807: $message
2808: </p>
2809: </body>
2810: </html>
2811: RESULTS
2812: }
2813:
2814: ######################################################################
2815: ######################################################################
2816:
2817: =pod
2818:
2819: =item &start_fresh_session()
2820:
2821: Cleans the global %groupsearch_db by removing all fields which begin with
2822: 'pre_' or 'store'.
2823:
2824: =cut
2825:
2826: ######################################################################
2827: ######################################################################
2828: sub start_fresh_session {
2829: delete $groupsearch_db{'mode_catalog'};
2830: foreach (keys %groupsearch_db) {
2831: if ($_ =~ /^pre_/) {
2832: delete $groupsearch_db{$_};
2833: }
2834: if ($_ =~ /^store/) {
2835: delete $groupsearch_db{$_};
2836: }
2837: }
2838: }
2839:
2840: 1;
2841:
2842: sub cleanup {
2843: if (tied(%groupsearch_db)) {
2844: unless (untie(%groupsearch_db)) {
2845: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2846: }
2847: }
2848: &untiehash();
2849: &Apache::lonmysql::disconnect_from_db();
2850: }
2851:
2852: __END__
2853:
2854: =pod
2855:
2856: =back
2857:
2858: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonsearchcat.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface