1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.213 2004/04/21 15:48:34 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78:
79: ######################################################################
80: ######################################################################
81: ##
82: ## Global variables
83: ##
84: ######################################################################
85: ######################################################################
86: my %groupsearch_db; # Database hash used to save values for the
87: # groupsearch RAT interface.
88: my %persistent_db; # gdbm hash which holds data which is supposed to
89: # persist across calls to lonsearchcat.pm
90:
91: # The different view modes and associated functions
92:
93: my %Views = ("detailed" => \&detailed_citation_view,
94: "summary" => \&summary_view,
95: "fielded" => \&fielded_format_view,
96: "xml" => \&xml_sgml_view,
97: "compact" => \&compact_view);
98:
99: ######################################################################
100: ######################################################################
101: sub handler {
102: my $r = shift;
103: # &set_defaults();
104: #
105: # set form defaults
106: #
107: my $hidden_fields;# Hold all the hidden fields used to keep track
108: # of the search system state
109: my $importbutton; # button to take the selected results and go to group
110: # sorting
111: my $diropendb; # The full path to the (temporary) search database file.
112: # This is set and used in &handler() and is also used in
113: # &output_results().
114: my $bodytag; # LON-CAPA standard body tag, gotten from
115: # &Apache::lonnet::bodytag.
116: # No title, no table, just a <body> tag.
117:
118: my $loaderror=&Apache::lonnet::overloaderror($r);
119: if ($loaderror) { return $loaderror; }
120:
121: my $closebutton; # button that closes the search window
122: # This button is different for the RAT compared to
123: # normal invocation.
124: #
125: &Apache::loncommon::content_type($r,'text/html');
126: $r->send_http_header;
127: return OK if $r->header_only;
128: ##
129: ## Prevent caching of the search interface window. Hopefully this means
130: ## we will get the launch=1 passed in a little more.
131: &Apache::loncommon::no_cache($r);
132: ##
133: ## Pick up form fields passed in the links.
134: ##
135: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
136: ['catalogmode','launch','acts','mode','form','element','pause',
137: 'phase','persistent_db_id','table','start','show',
138: 'cleargroupsort','titleelement']);
139: ##
140: ## The following is a trick - we wait a few seconds if asked to so
141: ## the daemon running the search can get ahead of the daemon
142: ## printing the results. We only need (theoretically) to do
143: ## this once, so the pause indicator is deleted
144: ##
145: if (exists($ENV{'form.pause'})) {
146: sleep(1);
147: delete($ENV{'form.pause'});
148: }
149: ##
150: ## Initialize global variables
151: ##
152: my $domain = $r->dir_config('lonDefDomain');
153: $diropendb= "/home/httpd/perl/tmp/".
154: "$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
155: #
156: # set the name of the persistent database
157: # $ENV{'form.persistent_db_id'} can only have digits in it.
158: if (! exists($ENV{'form.persistent_db_id'}) ||
159: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
160: ($ENV{'form.launch'} eq '1')) {
161: $ENV{'form.persistent_db_id'} = time;
162: }
163: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
164: my $persistent_db_file = "/home/httpd/perl/tmp/".
165: &Apache::lonnet::escape($domain).
166: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
167: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
168: ##
169: &Apache::lonhtmlcommon::clear_breadcrumbs();
170: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
171: &Apache::lonhtmlcommon::add_breadcrumb
172: ({href=>'/adm/searchcat?'.
173: 'catalogmode='.$ENV{'form.catalogmode'}.
174: '&launch='.$ENV{'form.launch'}.
175: '&mode='.$ENV{'form.mode'},
176: text=>"Course and Catalog Search",
177: bug=>'Searching',});
178: } else {
179: &Apache::lonhtmlcommon::add_breadcrumb
180: ({href=>'/adm/searchcat?'.
181: 'catalogmode='.$ENV{'form.catalogmode'}.
182: '&launch='.$ENV{'form.launch'}.
183: '&mode='.$ENV{'form.mode'},
184: text=>"Catalog Search",
185: bug=>'Searching',});
186: }
187: #
188: if (! &get_persistent_form_data($persistent_db_file)) {
189: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
190: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
191: "from $persistent_db_file");
192: $r->print(<<END);
193: <html>
194: <head><title>LON-CAPA Search Error</title></head>
195: $bodytag
196: We were unable to retrieve data describing your search. This is a serious
197: error and has been logged. Please alert your LON-CAPA administrator.
198: </body>
199: </html>
200: END
201: return OK;
202: }
203: }
204: ##
205: ## Clear out old values from groupsearch database
206: ##
207: untie %groupsearch_db if (tied(%groupsearch_db));
208: if (($ENV{'form.cleargroupsort'} eq '1') ||
209: (($ENV{'form.launch'} eq '1') &&
210: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
211: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
212: &start_fresh_session();
213: untie %groupsearch_db;
214: delete($ENV{'form.cleargroupsort'});
215: } else {
216: # This is a stupid error to give to the user.
217: # It really tells them nothing.
218: $r->print('<html><head></head>'.$bodytag.
219: 'Unable to tie hash to db file</body></html>');
220: return OK;
221: }
222: }
223: ##
224: ## Configure hidden fields
225: ##
226: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
227: $ENV{'form.persistent_db_id'}.'" />'."\n";
228: if (exists($ENV{'form.catalogmode'})) {
229: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
230: $ENV{'form.catalogmode'}.'" />'."\n";
231: }
232: if (exists($ENV{'form.form'})) {
233: $hidden_fields .= '<input type="hidden" name="form" value="'.
234: $ENV{'form.form'}.'" />'."\n";
235: }
236: if (exists($ENV{'form.element'})) {
237: $hidden_fields .= '<input type="hidden" name="element" value="'.
238: $ENV{'form.element'}.'" />'."\n";
239: }
240: if (exists($ENV{'form.titleelement'})) {
241: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
242: $ENV{'form.titleelement'}.'" />'."\n";
243: }
244: if (exists($ENV{'form.mode'})) {
245: $hidden_fields .= '<input type="hidden" name="mode" value="'.
246: $ENV{'form.mode'}.'" />'."\n";
247: }
248: ##
249: ## Configure dynamic components of interface
250: ##
251: if ($ENV{'form.catalogmode'} eq 'interactive') {
252: $closebutton="<input type='button' name='close' value='CLOSE' ";
253: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
254: $closebutton .="onClick='parent.close()'";
255: } else {
256: $closebutton .="onClick='self.close()'";
257: }
258: $closebutton .=">\n";
259: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
260: $closebutton="<input type='button' name='close' value='CLOSE' ";
261: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
262: $closebutton .="onClick='parent.close()'";
263: } else {
264: $closebutton .="onClick='self.close()'";
265: }
266: $closebutton .= ">";
267: $importbutton=<<END;
268: <input type='button' name='import' value='IMPORT'
269: onClick='javascript:select_group()'>
270: END
271: } else {
272: $closebutton = '';
273: $importbutton = '';
274: }
275: ##
276: ## Sanity checks on form elements
277: ##
278: if (!defined($ENV{'form.viewselect'})) {
279: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
280: ($ENV{'form.catalogmode'} eq 'interactive')) {
281: $ENV{'form.viewselect'} ="Compact View";
282: } else {
283: $ENV{'form.viewselect'} ="Detailed Citation View";
284: }
285: }
286: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
287: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
288: #
289: $ENV{'form.searchmode'} = 'basic';
290: if ($ENV{'form.phase'} eq 'adv_search' ||
291: $ENV{'form.phase'} eq 'disp_adv') {
292: $ENV{'form.searchmode'} = 'advanced';
293: } elsif ($ENV{'form.phase'} eq 'course_search') {
294: $ENV{'form.searchmode'} = 'course_search';
295: }
296: #
297: if ($ENV{'form.searchmode'} eq 'advanced') {
298: &Apache::lonhtmlcommon::add_breadcrumb
299: ({href=>'/adm/searchcat?phase=disp_adv&'.
300: 'catalogmode='.$ENV{'form.catalogmode'}.
301: '&launch='.$ENV{'form.launch'}.
302: '&mode='.$ENV{'form.mode'},
303: text=>"Advanced Search",
304: bug=>'Searching',});
305: } elsif ($ENV{'form.searchmode'} eq 'course search') {
306: &Apache::lonhtmlcommon::add_breadcrumb
307: ({href=>'/adm/searchcat?phase=disp_adv&'.
308: 'catalogmode='.$ENV{'form.catalogmode'}.
309: '&launch='.$ENV{'form.launch'}.
310: '&mode='.$ENV{'form.mode'},
311: text=>"Course Search",
312: bug=>'Searching',});
313: }
314: ##
315: ## Switch on the phase
316: ##
317: if ($ENV{'form.phase'} eq 'disp_basic') {
318: &print_basic_search_form($r,$closebutton,$hidden_fields);
319: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
320: &print_advanced_search_form($r,$closebutton,$hidden_fields);
321: } elsif ($ENV{'form.phase'} eq 'results') {
322: &display_results($r,$importbutton,$closebutton,$diropendb);
323: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
324: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
325: &get_persistent_data($persistent_db_file,
326: ['query','customquery','customshow',
327: 'libraries','pretty_string']);
328: if ($ENV{'form.phase'} eq 'sort') {
329: &print_sort_form($r,$pretty_string);
330: } elsif ($ENV{'form.phase'} eq 'run_search') {
331: &run_search($r,$query,$customquery,$customshow,
332: $libraries,$pretty_string);
333: }
334: } elsif ($ENV{'form.phase'} eq 'course_search') {
335: &course_search($r);
336: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
337: ($ENV{'form.phase'} eq 'adv_search')) {
338: # Set up table
339: if (! defined(&create_results_table())) {
340: my $errorstring=&Apache::lonmysql::get_error();
341: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
342: 'needed table. lonmysql error:'.
343: $errorstring);
344: $r->print(<<END);
345: <html><head><title>Search Error</title></head>
346: $bodytag
347: Unable to create table in which to store search results.
348: The search has been aborted.
349: </body>
350: </html>
351: END
352: return OK;
353: }
354: delete($ENV{'form.launch'});
355: if (! &make_form_data_persistent($r,$persistent_db_file)) {
356: $r->print(<<END);
357: <html><head><title>Search Error</title></head>
358: $bodytag
359: Unable to properly store search information. The search has been aborted.
360: </body>
361: </html>
362: END
363: return OK;
364: }
365: #
366: # We are running a search
367: my ($query,$customquery,$customshow,$libraries) =
368: (undef,undef,undef,undef);
369: my $pretty_string;
370: if ($ENV{'form.phase'} eq 'basic_search') {
371: ($query,$pretty_string,$libraries) =
372: &parse_basic_search($r,$closebutton,$hidden_fields);
373: } else { # Advanced search
374: ($query,$customquery,$customshow,$libraries,$pretty_string)
375: = &parse_advanced_search($r,$closebutton,$hidden_fields);
376: return OK if (! defined($query));
377: }
378: &make_persistent({ query => $query,
379: customquery => $customquery,
380: customshow => $customshow,
381: libraries => $libraries,
382: pretty_string => $pretty_string },
383: $persistent_db_file);
384: ##
385: ## Print out the frames interface
386: ##
387: &print_frames_interface($r);
388: }
389: return OK;
390: }
391:
392: ######################################################################
393: ######################################################################
394: ##
395: ## Course Search
396: ##
397: ######################################################################
398: ######################################################################
399: { # Scope the course search to avoid global variables
400: #
401: # Variables For course search
402: my %alreadyseen;
403: my %hash;
404: my $totalfound;
405:
406: sub course_search {
407: my $r=shift;
408: my $bodytag=&Apache::loncommon::bodytag('Course Search').
409: &Apache::loncommon::help_open_bug('Searching');
410: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
411: my $search_string = $ENV{'form.courseexp'};
412: my @New_Words;
413: if ($ENV{'form.crsrelated'}) {
414: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
415: if (@New_Words) {
416: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
417: } else {
418: $pretty_search_string .= ' '.&mt('with no related words').".";
419: }
420: }
421: my $fulltext=$ENV{'form.crsfulltext'};
422: my @allwords=($search_string,@New_Words);
423: $totalfound=0;
424: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
425: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
426: $r->rflush();
427: # ======================================================= Go through the course
428: undef %alreadyseen;
429: %alreadyseen=();
430: my $c=$r->connection;
431: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
432: &GDBM_READER(),0640)) {
433: foreach (keys %hash) {
434: if ($c->aborted()) { last; }
435: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
436: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
437: @allwords);
438: }
439: }
440: untie(%hash);
441: }
442: unless ($totalfound) {
443: $r->print('<p>'.&mt('No resources found').'.</p>');
444: }
445: # =================================================== Done going through course
446: $r->print('</body></html>');
447: }
448:
449: # =============================== This pulls up a resource and its dependencies
450:
451: sub checkonthis {
452: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
453: $alreadyseen{$url}=1;
454: $r->rflush();
455: my $result=&Apache::lonnet::metadata($url,'title').' '.
456: &Apache::lonnet::metadata($url,'subject').' '.
457: &Apache::lonnet::metadata($url,'abstract').' '.
458: &Apache::lonnet::metadata($url,'keywords');
459: if (($url) && ($fulltext)) {
460: $result.=&Apache::lonnet::ssi_body($url);
461: }
462: $result=~s/\s+/ /gs;
463: my $applies=0;
464: foreach (@allwords) {
465: if ($_=~/\w/) {
466: if ($result=~/$_/si) {
467: $applies++;
468: }
469: }
470: }
471: # Does this resource apply?
472: if ($applies) {
473: $r->print('<br />');
474: for (my $i=0;$i<=$level*5;$i++) {
475: $r->print(' ');
476: }
477: $r->print('<a href="'.$url.'" target="cat">'.
478: ($title?$title:$url).'</a><br />');
479: $totalfound++;
480: } elsif ($fulltext) {
481: $r->print(' .');
482: }
483: $r->rflush();
484: # Check also the dependencies of this one
485: my $dependencies=
486: &Apache::lonnet::metadata($url,'dependencies');
487: foreach (split(/\,/,$dependencies)) {
488: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
489: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
490: }
491: }
492: }
493:
494: sub untiehash {
495: if (tied(%hash)) {
496: untie(%hash);
497: }
498: }
499:
500: } # End of course search scoping
501:
502: sub search_html_header {
503: my $Str = <<ENDHEADER;
504: <html>
505: <head>
506: <title>The LearningOnline Network with CAPA</title>
507: <script type="text/javascript">
508: function openhelp(val) {
509: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
510: 'scrollbars=1,width=600,height=300');
511: openhelpwin.focus();
512: }
513: </script>
514: </head>
515: ENDHEADER
516: return $Str;
517: }
518:
519: ######################################################################
520: ######################################################################
521:
522: =pod
523:
524: =item &print_basic_search_form()
525:
526: Prints the form for the basic search. Sorry the name is so cryptic.
527:
528: =cut
529:
530: ######################################################################
531: ######################################################################
532: sub print_basic_search_form {
533: my ($r,$closebutton,$hidden_fields) = @_;
534: my $bodytag=&Apache::loncommon::bodytag('Search').
535: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Finding_Resources',
536: undef,undef,! $ENV{'form.launch'});
537: my $scrout = &search_html_header().$bodytag;
538: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
539: # Define interface components
540: my $userelatedwords=
541: &mt('[_1] use related words',
542: &Apache::lonhtmlcommon::checkbox
543: ('related',$ENV{'form.related'}));
544: my $onlysearchdomain=
545: &mt('[_1] only search domain [_2]',
546: &Apache::lonhtmlcommon::checkbox
547: ('domains',$ENV{'form.domains'}),
548: $r->dir_config('lonDefDomain'));
549: my $adv_search_link =
550: '<a href="/adm/searchcat?'.
551: 'phase=disp_adv&'.
552: 'catalogmode='.$ENV{'form.catalogmode'}.
553: '&launch='.$ENV{'form.launch'}.
554: '&mode='.$ENV{'form.mode'}.
555: '">'.&mt('Advanced Search').'</a>';
556: #
557: $scrout.='<form name="loncapa_search" method="post" '.
558: 'action="/adm/searchcat">'.
559: '<input type="hidden" name="phase" value="basic_search" />'.
560: $hidden_fields;
561: #
562: $scrout .= '<center>'.$/;
563: if ($ENV{'request.course.id'}) {
564: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
565: } else {
566: # No need to tell them they are searching
567: $scrout.= ('<br />'x2);
568: }
569: $scrout.='<table>'.
570: '<tr><td align="center" valign="top">'.
571: &Apache::lonhtmlcommon::textbox('basicexp',
572: $ENV{'form.basicexp'},50).'<br />'.
573: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
574: '<td><font size="-1">'.
575: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
576: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
577: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
578: '</font></td>'.
579: '</tr>'.$/;
580: #
581: # $scrout .= '<tr><td align="center">'.
582: # '<font size="-1">'.
583: # $userelatedwords.(' 'x3).
584: # $onlysearchdomain.(' 'x2).$adv_search_link.
585: # '</font>'.
586: # '</td></tr>'.$/;
587: $scrout .= '<tr><td align="center" colspan="2">'.
588: '<font size="-1">'.
589: '<input type="submit" name="basicsubmit" '.
590: 'value="'.&mt('Search').'" />'.
591: (' 'x2).$closebutton.(' 'x2).&viewoptions().
592: '</font>'.
593: '</td></tr>'.$/;
594: $scrout .= '</table>'.$/.'</center>'.'</form>';
595: }
596: if ($ENV{'request.course.id'}) {
597: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
598: 'header' => 'Course Search',
599: 'note' => 'Enter terms or phrases, then press "Search" below',
600: 'use' => 'use related words',
601: 'full' =>'fulltext search (time consuming)'
602: );
603: $scrout.=(<<ENDCOURSESEARCH);
604: <form name="loncapa_search" method="post" action="/adm/searchcat">
605: <center>
606: <hr />
607: <h1>$lt{'header'}</h1>
608: <input type="hidden" name="phase" value="course_search" />
609: $hidden_fields
610: <p>
611: $lt{'note'}.
612: </p>
613: <p>
614: <table>
615: <tr><td>
616: ENDCOURSESEARCH
617: $scrout.=' '.
618: &Apache::lonhtmlcommon::textbox('courseexp',
619: $ENV{'form.courseexp'},40);
620: my $crscheckbox =
621: &Apache::lonhtmlcommon::checkbox('crsfulltext',
622: $ENV{'form.crsfulltext'});
623: my $relcheckbox =
624: &Apache::lonhtmlcommon::checkbox('crsrelated',
625: $ENV{'form.crsrelated'});
626: $scrout.=(<<ENDENDCOURSE);
627: </td></tr>
628: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
629: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
630: </table><p>
631: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
632: </p>
633: </center>
634: </form>
635: ENDENDCOURSE
636: }
637: $scrout.=(<<ENDDOCUMENT);
638: </body>
639: </html>
640: ENDDOCUMENT
641: $r->print($scrout);
642: return;
643: }
644: ######################################################################
645: ######################################################################
646:
647: =pod
648:
649: =item &advanced_search_form()
650:
651: Prints the advanced search form.
652:
653: =cut
654:
655: ######################################################################
656: ######################################################################
657: sub print_advanced_search_form{
658: my ($r,$closebutton,$hidden_fields) = @_;
659: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
660: 'reset' => 'Reset',
661: 'help' => 'Help');
662: my $advanced_buttons = <<"END";
663: <p>
664: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
665: <input type="reset" name="reset" value='$lt{"reset"}' />
666: $closebutton
667: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
668: END
669: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
670: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
671: 'Finding_Resources',
672: undef,undef,
673: ! $ENV{'form.launch'});
674: my $searchhelp=&searchhelp();
675: my $scrout=&search_html_header();
676: $scrout .= <<"ENDHEADER";
677: $bodytag
678: <form method="post" action="/adm/searchcat" name="advsearch">
679: $advanced_buttons
680: ENDHEADER
681: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
682: '<input type="hidden" name="phase" value="adv_search" />';
683: my %fields=&Apache::lonmeta::fieldnames();
684: #
685: $scrout.= '<p>'.$searchhelp.'</p>'.
686: "<table>\n";
687: my %related_word_search =
688: ('title'=>1,
689: 'author'=>0,
690: 'owner'=>0,
691: 'authorspace'=>0,
692: 'modifyinguser'=>0,
693: 'keywords'=>1,
694: 'notes'=>1,
695: 'abstract'=>1,
696: 'standards'=>1,
697: 'mime'=>1,
698: );
699: #
700: foreach my $field ('title','author','owner','authorspace','modifyinguser',
701: 'keywords','notes','abstract','standards','mime') {
702: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
703: &Apache::lonmeta::prettyinput($field,
704: $ENV{'form.'.$field},
705: $field,
706: 'advsearch',
707: $related_word_search{$field},
708: '</td><td align="left">',
709: $ENV{'form.'.$field.'_related'},
710: 50);
711: if ($related_word_search{$field}) {
712: $scrout .= 'related words';
713: } else {
714: $scrout .= '</td><td> ';
715: }
716: $scrout .= '</td></tr>'.$/;
717: }
718: foreach my $field ('lowestgradelevel','highestgradelevel') {
719: $scrout.='<tr>'.
720: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
721: '<td colspan="2">'.
722: &Apache::lonmeta::prettyinput($field,
723: $ENV{'form.'.$field},
724: $field,
725: 'advsearch',
726: 0).
727: '</td></tr>'.$/;
728: }
729: $scrout.='<tr><td align="right">'.
730: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
731: &Apache::loncommon::filecategoryselect('category',
732: $ENV{'form.category'}).
733: '</td></tr>'.$/;
734: $scrout.='<tr><td align="right" valign="top">'.
735: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
736: &Apache::loncommon::domain_select('domains',
737: $ENV{'form.domains'},1).
738: '</td></tr>'.$/;
739: $scrout .= "</table>\n<br />\n<table>\n";
740: my %dates=&Apache::lonlocal::texthash
741: ('creationdatestart' => 'Creation Date After',
742: 'creationdateend' => 'Creation Date Before',
743: 'lastrevisiondatestart' => 'Last Revision Date After',
744: 'lastrevisiondateend' => 'Last Revision Date Before');
745: foreach my $field (sort keys %dates) {
746: $scrout.='<tr>'.
747: '<td align="right">'.&titlefield($dates{$field}).'</td><td>'.
748: &Apache::lonhtmlcommon::date_setter('advsearch',$field,0,'',1).
749: '</td></tr>'.$/;
750: }
751: $scrout.="</table>\n";
752: $scrout.=<<ENDDOCUMENT;
753: $advanced_buttons
754: </form>
755: </body>
756: </html>
757: ENDDOCUMENT
758: $r->print($scrout);
759: return;
760: }
761:
762: ######################################################################
763: ######################################################################
764:
765: =pod
766:
767: =item &titlefield()
768:
769: Inputs: title text
770:
771: Outputs: titletext with font wrapper
772:
773: =cut
774:
775: ######################################################################
776: ######################################################################
777: sub titlefield {
778: my $title=shift;
779: return $title;
780: }
781:
782: ######################################################################
783: ######################################################################
784:
785: =pod
786:
787: =item viewoptiontext()
788:
789: Inputs: codename for view option
790:
791: Outputs: displayed text
792:
793: =cut
794:
795: ######################################################################
796: ######################################################################
797: sub viewoptiontext {
798: my $code=shift;
799: my %desc=&Apache::lonlocal::texthash
800: ('detailed' => "Detailed Citation View",
801: 'xml' => 'XML/SGML',
802: 'compact' => 'Compact View',
803: 'fielded' => 'Fielded Format',
804: 'summary' => 'Summary View');
805: return $desc{$code};
806: }
807:
808: ######################################################################
809: ######################################################################
810:
811: =pod
812:
813: =item viewoptions()
814:
815: Inputs: none
816:
817: Outputs: text for box with view options
818:
819: =cut
820:
821: ######################################################################
822: ######################################################################
823: sub viewoptions {
824: my $scrout="\n".'<nobr>';
825: if (! defined($ENV{'form.viewselect'})) {
826: $ENV{'form.viewselect'}='detailed';
827: }
828: $scrout.=&Apache::lonmeta::selectbox('viewselect',
829: $ENV{'form.viewselect'},
830: \&viewoptiontext,
831: sort(keys(%Views)));
832: $scrout.= ' ';
833: $scrout.=&Apache::lonmeta::selectbox('show',
834: $ENV{'form.show'},
835: undef,
836: (10,20,50,100,1000,10000));
837: $scrout .= (' 'x2).&mt('Records per Page').'</nobr>'.$/;
838: return $scrout;
839: }
840:
841: ######################################################################
842: ######################################################################
843:
844: =pod
845:
846: =item searchhelp()
847:
848: Inputs: none
849:
850: Outputs: return little blurb on how to enter searches
851:
852: =cut
853:
854: ######################################################################
855: ######################################################################
856: sub searchhelp {
857: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
858: }
859:
860: ######################################################################
861: ######################################################################
862:
863: =pod
864:
865: =item &get_persistent_form_data()
866:
867: Inputs: filename of database
868:
869: Outputs: returns undef on database errors.
870:
871: This function is the reverse of &make_persistent() for form data.
872: Retrieve persistent data from %persistent_db. Retrieved items will have their
873: values unescaped. If a form value already exists in $ENV, it will not be
874: overwritten. Form values that are array references may have values appended
875: to them.
876:
877: =cut
878:
879: ######################################################################
880: ######################################################################
881: sub get_persistent_form_data {
882: my $filename = shift;
883: return 0 if (! -e $filename);
884: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
885: &GDBM_READER(),0640));
886: #
887: # These make sure we do not get array references printed out as 'values'.
888: my %arrays_allowed = ('form.domains'=>1);
889: #
890: # Loop through the keys, looking for 'form.'
891: foreach my $name (keys(%persistent_db)) {
892: next if ($name !~ /^form./);
893: # Kludgification begins!
894: if ($name eq 'form.domains' &&
895: $ENV{'form.searchmode'} eq 'basic' &&
896: $ENV{'form.phase'} ne 'disp_basic') {
897: next;
898: }
899: # End kludge (hopefully)
900: next if (exists($ENV{$name}));
901: my @values = map {
902: &Apache::lonnet::unescape($_);
903: } split(',',$persistent_db{$name});
904: next if (@values <1);
905: if ($arrays_allowed{$name}) {
906: $ENV{$name} = [@values];
907: } else {
908: $ENV{$name} = $values[0] if ($values[0]);
909: }
910: }
911: untie (%persistent_db);
912: return 1;
913: }
914:
915: ######################################################################
916: ######################################################################
917:
918: =pod
919:
920: =item &get_persistent_data()
921:
922: Inputs: filename of database, ref to array of values to recover.
923:
924: Outputs: array of values. Returns undef on error.
925:
926: This function is the reverse of &make_persistent();
927: Retrieve persistent data from %persistent_db. Retrieved items will have their
928: values unescaped. If the item contains commas (before unescaping), the
929: returned value will be an array pointer.
930:
931: =cut
932:
933: ######################################################################
934: ######################################################################
935: sub get_persistent_data {
936: my $filename = shift;
937: my @Vars = @{shift()};
938: my @Values; # Return array
939: return undef if (! -e $filename);
940: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
941: &GDBM_READER(),0640));
942: foreach my $name (@Vars) {
943: if (! exists($persistent_db{$name})) {
944: push @Values, undef;
945: next;
946: }
947: my @values = map {
948: &Apache::lonnet::unescape($_);
949: } split(',',$persistent_db{$name});
950: if (@values <= 1) {
951: push @Values,$values[0];
952: } else {
953: push @Values,\@values;
954: }
955: }
956: untie (%persistent_db);
957: return @Values;
958: }
959:
960: ######################################################################
961: ######################################################################
962:
963: =pod
964:
965: =item &make_persistent()
966:
967: Inputs: Hash of values to save, filename of persistent database.
968:
969: Store variables away to the %persistent_db.
970: Values will be escaped. Values that are array pointers will have their
971: elements escaped and concatenated in a comma separated string.
972:
973: =cut
974:
975: ######################################################################
976: ######################################################################
977: sub make_persistent {
978: my %save = %{shift()};
979: my $filename = shift;
980: return undef if (! tie(%persistent_db,'GDBM_File',
981: $filename,&GDBM_WRCREAT(),0640));
982: foreach my $name (keys(%save)) {
983: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
984: # We handle array references, but not recursively.
985: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
986: $persistent_db{$name} = $store;
987: }
988: untie(%persistent_db);
989: return 1;
990: }
991:
992: ######################################################################
993: ######################################################################
994:
995: =pod
996:
997: =item &make_form_data_persistent()
998:
999: Inputs: filename of persistent database.
1000:
1001: Store most form variables away to the %persistent_db.
1002: Values will be escaped. Values that are array pointers will have their
1003: elements escaped and concatenated in a comma separated string.
1004:
1005: =cut
1006:
1007: ######################################################################
1008: ######################################################################
1009: sub make_form_data_persistent {
1010: my $r = shift;
1011: my $filename = shift;
1012: my %save;
1013: foreach (keys(%ENV)) {
1014: next if (!/^form/ || /submit/);
1015: $save{$_} = $ENV{$_};
1016: }
1017: return &make_persistent(\%save,$filename);
1018: }
1019:
1020: ######################################################################
1021: ######################################################################
1022:
1023: =pod
1024:
1025: =item &parse_advanced_search()
1026:
1027: Parse advanced search form and return the following:
1028:
1029: =over 4
1030:
1031: =item $query Scalar containing an SQL query.
1032:
1033: =item $customquery Scalar containing a custom query.
1034:
1035: =item $customshow Scalar containing commands to show custom metadata.
1036:
1037: =item $libraries_to_query Reference to array of domains to search.
1038:
1039: =back
1040:
1041: =cut
1042:
1043: ######################################################################
1044: ######################################################################
1045: sub parse_advanced_search {
1046: my ($r,$closebutton,$hidden_fields)=@_;
1047: my $fillflag=0;
1048: my $pretty_search_string = "<br />\n";
1049: # Clean up fields for safety
1050: for my $field ('title','author','subject','keywords','url','version',
1051: 'creationdatestart_month','creationdatestart_day',
1052: 'creationdatestart_year','creationdateend_month',
1053: 'creationdateend_day','creationdateend_year',
1054: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1055: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1056: 'lastrevisiondateend_day','lastrevisiondateend_year',
1057: 'notes','abstract','extension','language','owner',
1058: 'custommetadata','customshow','category') {
1059: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1060: }
1061: foreach ('mode','form','element') {
1062: # is this required? Hmmm.
1063: next unless (exists($ENV{"form.$_"}));
1064: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1065: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1066: }
1067: # Preprocess the category form element.
1068: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1069: ref($ENV{'form.category'}));
1070: #
1071: # Check to see if enough information was filled in
1072: for my $field ('title','author','subject','keywords','url','version',
1073: 'notes','abstract','category','extension','language',
1074: 'owner','custommetadata') {
1075: if (&filled($ENV{"form.$field"})) {
1076: $fillflag++;
1077: }
1078: }
1079: if (! $fillflag) {
1080: &output_blank_field_error($r,$closebutton,
1081: 'phase=disp_adv',$hidden_fields);
1082: return ;
1083: }
1084: # Turn the form input into a SQL-based query
1085: my $query='';
1086: my @queries;
1087: my $font = '<font color="#800000" face="helvetica">';
1088: # Evaluate logical expression AND/OR/NOT phrase fields.
1089: foreach my $field ('title','author','subject','notes','abstract','url',
1090: 'keywords','version','owner','standards') {
1091: if ($ENV{'form.'.$field}) {
1092: my $searchphrase = $ENV{'form.'.$field};
1093: $pretty_search_string .= $font."$field</font> contains <b>".
1094: $searchphrase."</b>";
1095: if ($ENV{'form.'.$field.'_related'}) {
1096: my @New_Words;
1097: ($searchphrase,@New_Words) = &related_version($searchphrase);
1098: if (@New_Words) {
1099: $pretty_search_string .= " with related words: ".
1100: "<b>@New_Words</b>.";
1101: } else {
1102: $pretty_search_string .= " with no related words.";
1103: }
1104: }
1105: $pretty_search_string .= "<br />\n";
1106: push @queries,&build_SQL_query($field,$searchphrase);
1107: }
1108: }
1109: #
1110: # Make the 'mime' from 'form.category' and 'form.extension'
1111: #
1112: my $searchphrase;
1113: if (exists($ENV{'form.category'}) &&
1114: $ENV{'form.category'} !~ /^\s*$/ &&
1115: $ENV{'form.category'} ne 'any') {
1116: my @extensions = &Apache::loncommon::filecategorytypes
1117: ($ENV{'form.category'});
1118: if (scalar(@extensions) > 0) {
1119: $searchphrase = join(' OR ',@extensions);
1120: }
1121: }
1122: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1123: $searchphrase .= ' OR ' if (defined($searchphrase));
1124: my @extensions = split(/,/,$ENV{'form.extension'});
1125: $searchphrase .= join(' OR ',@extensions);
1126: }
1127: if (defined($searchphrase)) {
1128: push @queries,&build_SQL_query('mime',$searchphrase);
1129: $pretty_search_string .=$font.'mime</font> contains <b>'.
1130: $searchphrase.'</b><br />';
1131: }
1132: #
1133: # Evaluate option lists
1134: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1135: push @queries,"(language like \"$ENV{'form.language'}\")";
1136: $pretty_search_string.=$font."language</font>= ".
1137: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1138: "<br />\n";
1139: }
1140: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1141: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1142: $pretty_search_string.=$font."copyright</font> = ".
1143: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1144: "<br \>\n";
1145: }
1146: #
1147: # Evaluate date windows
1148: my $datequery=&build_date_queries(
1149: $ENV{'form.creationdatestart_month'},
1150: $ENV{'form.creationdatestart_day'},
1151: $ENV{'form.creationdatestart_year'},
1152: $ENV{'form.creationdateend_month'},
1153: $ENV{'form.creationdateend_day'},
1154: $ENV{'form.creationdateend_year'},
1155: $ENV{'form.lastrevisiondatestart_month'},
1156: $ENV{'form.lastrevisiondatestart_day'},
1157: $ENV{'form.lastrevisiondatestart_year'},
1158: $ENV{'form.lastrevisiondateend_month'},
1159: $ENV{'form.lastrevisiondateend_day'},
1160: $ENV{'form.lastrevisiondateend_year'},
1161: );
1162: # Test to see if date windows are legitimate
1163: if ($datequery=~/^Incorrect/) {
1164: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1165: return ;
1166: } elsif ($datequery) {
1167: # Here is where you would set up pretty_search_string to output
1168: # date query information.
1169: push @queries,$datequery;
1170: }
1171: #
1172: # Process form information for custom metadata querying
1173: my $customquery=undef;
1174: ##
1175: ## The custom metadata search was removed q long time ago mostly
1176: ## because I was unable to figureout exactly how it worked and could
1177: ## not imagine people actually using it. MH
1178: ##
1179: # if ($ENV{'form.custommetadata'}) {
1180: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1181: # $ENV{'form.custommetadata'}."</b><br />\n";
1182: # $customquery=&build_custommetadata_query('custommetadata',
1183: # $ENV{'form.custommetadata'});
1184: # }
1185: my $customshow=undef;
1186: # if ($ENV{'form.customshow'}) {
1187: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1188: # $ENV{'form.customshow'}."</b><br />\n";
1189: # $customshow=$ENV{'form.customshow'};
1190: # $customshow=~s/[^\w\s]//g;
1191: # my @fields=split(/\s+/,$customshow);
1192: # $customshow=join(" ",@fields);
1193: # }
1194: ##
1195: ## Deal with restrictions to given domains
1196: ##
1197: my ($libraries_to_query,$pretty_domains_string) =
1198: &parse_domain_restrictions();
1199: $pretty_search_string .= $pretty_domains_string."<br />\n";
1200: #
1201: if (@queries) {
1202: $query=join(" AND ",@queries);
1203: $query="select * from metadata where $query";
1204: } elsif ($customquery) {
1205: $query = '';
1206: }
1207: return ($query,$customquery,$customshow,$libraries_to_query,
1208: $pretty_search_string);
1209: }
1210:
1211: sub parse_domain_restrictions {
1212: my $libraries_to_query = undef;
1213: # $ENV{'form.domains'} can be either a scalar or an array reference.
1214: # We need an array.
1215: if (! exists($ENV{'form.domains'})) {
1216: return (undef,'');
1217: }
1218: my @allowed_domains;
1219: if (ref($ENV{'form.domains'})) {
1220: @allowed_domains = @{$ENV{'form.domains'}};
1221: } else {
1222: @allowed_domains = ($ENV{'form.domains'});
1223: }
1224: #
1225: my %domain_hash = ();
1226: my $pretty_domains_string;
1227: foreach (@allowed_domains) {
1228: $domain_hash{$_}++;
1229: }
1230: if ($domain_hash{'any'}) {
1231: $pretty_domains_string = "In all LON-CAPA domains.";
1232: } else {
1233: if (@allowed_domains > 1) {
1234: $pretty_domains_string = "In LON-CAPA domains:";
1235: } else {
1236: $pretty_domains_string = "In LON-CAPA domain ";
1237: }
1238: foreach (sort @allowed_domains) {
1239: $pretty_domains_string .= "<b>".$_."</b> ";
1240: }
1241: foreach (keys(%Apache::lonnet::libserv)) {
1242: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1243: push @$libraries_to_query,$_;
1244: }
1245: }
1246: }
1247: return ($libraries_to_query,$pretty_domains_string);
1248: }
1249:
1250: ######################################################################
1251: ######################################################################
1252:
1253: =pod
1254:
1255: =item &parse_basic_search()
1256:
1257: Parse the basic search form and return a scalar containing an sql query.
1258:
1259: =cut
1260:
1261: ######################################################################
1262: ######################################################################
1263: sub parse_basic_search {
1264: my ($r,$closebutton)=@_;
1265: #
1266: # Clean up fields for safety
1267: for my $field ('basicexp') {
1268: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1269: }
1270: foreach ('mode','form','element') {
1271: # is this required? Hmmm.
1272: next unless (exists($ENV{"form.$_"}));
1273: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1274: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1275: }
1276: my ($libraries_to_query,$pretty_domains_string) =
1277: &parse_domain_restrictions();
1278: #
1279: # Check to see if enough of a query is filled in
1280: unless (&filled($ENV{'form.basicexp'})) {
1281: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1282: return OK;
1283: }
1284: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1285: my $search_string = $ENV{'form.basicexp'};
1286: if ($ENV{'form.related'}) {
1287: my @New_Words;
1288: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1289: if (@New_Words) {
1290: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1291: } else {
1292: $pretty_search_string .= " with no related words.";
1293: }
1294: }
1295: #
1296: # Build SQL query string based on form page
1297: my $query='';
1298: my $concatarg=join(',',
1299: ('title', 'author', 'subject', 'notes', 'abstract',
1300: 'keywords'));
1301: $concatarg='title' if $ENV{'form.titleonly'};
1302: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1303: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1304: $pretty_search_string .= ' '.$pretty_domains_string;
1305: }
1306: $pretty_search_string .= "<br />\n";
1307: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1308: # &Apache::lonnet::logthis($final_query);
1309: return ($final_query,$pretty_search_string,
1310: $libraries_to_query);
1311: }
1312:
1313: ######################################################################
1314: ######################################################################
1315:
1316: =pod
1317:
1318: =item &related_version()
1319:
1320: Modifies an input string to include related words. Words in the string
1321: are replaced with parenthesized lists of 'OR'd words. For example
1322: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1323:
1324: Note: Using this twice on a string is probably silly.
1325:
1326: =cut
1327:
1328: ######################################################################
1329: ######################################################################
1330: sub related_version {
1331: my $search_string = shift;
1332: my $result = $search_string;
1333: my %New_Words = ();
1334: while ($search_string =~ /(\w+)/cg) {
1335: my $word = $1;
1336: next if (lc($word) =~ /\b(or|and|not)\b/);
1337: my @Words = &Apache::loncommon::get_related_words($word);
1338: @Words = ($#Words>4? @Words[0..4] : @Words);
1339: foreach (@Words) { $New_Words{$_}++;}
1340: my $replacement = join " OR ", ($word,@Words);
1341: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1342: }
1343: return $result,sort(keys(%New_Words));
1344: }
1345:
1346: ######################################################################
1347: ######################################################################
1348:
1349: =pod
1350:
1351: =item &build_SQL_query()
1352:
1353: Builds a SQL query string from a logical expression with AND/OR keywords
1354: using Text::Query and &recursive_SQL_query_builder()
1355:
1356: =cut
1357:
1358: ######################################################################
1359: ######################################################################
1360: sub build_SQL_query {
1361: my ($field_name,$logic_statement)=@_;
1362: my $q=new Text::Query('abc',
1363: -parse => 'Text::Query::ParseAdvanced',
1364: -build => 'Text::Query::Build');
1365: $q->prepare($logic_statement);
1366: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1367: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1368: return $sql_query;
1369: }
1370:
1371: ######################################################################
1372: ######################################################################
1373:
1374: =pod
1375:
1376: =item &build_custommetadata_query()
1377:
1378: Constructs a custom metadata query using a rather heinous regular
1379: expression.
1380:
1381: =cut
1382:
1383: ######################################################################
1384: ######################################################################
1385: sub build_custommetadata_query {
1386: my ($field_name,$logic_statement)=@_;
1387: my $q=new Text::Query('abc',
1388: -parse => 'Text::Query::ParseAdvanced',
1389: -build => 'Text::Query::BuildAdvancedString');
1390: $q->prepare($logic_statement);
1391: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1392: # quick fix to change literal into xml tag-matching
1393: # will eventually have to write a separate builder module
1394: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1395: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1396: /\\<$1\\>?# \<wordone\>
1397: \[\^\\<\]?# [^\<]
1398: \*$2\[\^\\<\]?# *wordtwo[^\<]
1399: \*\\<\\\/$1\\>?# *\<\/wordone\>
1400: /g;
1401: return $matchexp;
1402: }
1403:
1404: ######################################################################
1405: ######################################################################
1406:
1407: =pod
1408:
1409: =item &recursive_SQL_query_build()
1410:
1411: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1412:
1413: =cut
1414:
1415: ######################################################################
1416: ######################################################################
1417: sub recursive_SQL_query_build {
1418: my ($dkey,$pattern)=@_;
1419: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1420: return $pattern unless @matches;
1421: foreach my $match (@matches) {
1422: $match=~/\[ (\w+)\s(.*) \]/;
1423: my ($key,$value)=($1,$2);
1424: my $replacement='';
1425: if ($key eq 'literal') {
1426: $replacement="($dkey LIKE \"\%$value\%\")";
1427: } elsif (lc($key) eq 'not') {
1428: $value=~s/LIKE/NOT LIKE/;
1429: # $replacement="($dkey not like $value)";
1430: $replacement="$value";
1431: } elsif ($key eq 'and') {
1432: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1433: $replacement="($1 AND $2)";
1434: } elsif ($key eq 'or') {
1435: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1436: $replacement="($1 OR $2)";
1437: }
1438: substr($pattern,
1439: index($pattern,$match),
1440: length($match),
1441: $replacement);
1442: }
1443: &recursive_SQL_query_build($dkey,$pattern);
1444: }
1445:
1446: ######################################################################
1447: ######################################################################
1448:
1449: =pod
1450:
1451: =item &build_date_queries()
1452:
1453: Builds a SQL logic query to check time/date entries.
1454: Also reports errors (check for /^Incorrect/).
1455:
1456: =cut
1457:
1458: ######################################################################
1459: ######################################################################
1460: sub build_date_queries {
1461: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1462: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1463: my @queries;
1464: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1465: unless ($cmonth1 and $cday1 and $cyear1 and
1466: $cmonth2 and $cday2 and $cyear2) {
1467: return "Incorrect entry for the creation date. You must specify ".
1468: "a starting month, day, and year and an ending month, ".
1469: "day, and year.";
1470: }
1471: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1472: $cnumeric1+=0;
1473: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1474: $cnumeric2+=0;
1475: if ($cnumeric1>$cnumeric2) {
1476: return "Incorrect entry for the creation date. The starting ".
1477: "date must occur before the ending date.";
1478: }
1479: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1480: "$cyear2-$cmonth2-$cday2 23:59:59')";
1481: push @queries,$cquery;
1482: }
1483: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1484: unless ($lmonth1 and $lday1 and $lyear1 and
1485: $lmonth2 and $lday2 and $lyear2) {
1486: return "Incorrect entry for the last revision date. You must ".
1487: "specify a starting month, day, and year and an ending ".
1488: "month, day, and year.";
1489: }
1490: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1491: $lnumeric1+=0;
1492: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1493: $lnumeric2+=0;
1494: if ($lnumeric1>$lnumeric2) {
1495: return "Incorrect entry for the last revision date. The ".
1496: "starting date must occur before the ending date.";
1497: }
1498: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1499: "$lyear2-$lmonth2-$lday2 23:59:59')";
1500: push @queries,$lquery;
1501: }
1502: if (@queries) {
1503: return join(" AND ",@queries);
1504: }
1505: return '';
1506: }
1507:
1508: ######################################################################
1509: ######################################################################
1510:
1511: =pod
1512:
1513: =item ©right_check()
1514:
1515: Inputs: $Metadata, a hash pointer of metadata for a resource.
1516:
1517: Returns: 1 if the resource is available to the user making the query,
1518: 0 otherwise.
1519:
1520: =cut
1521:
1522: ######################################################################
1523: ######################################################################
1524: sub copyright_check {
1525: my $Metadata = shift;
1526: # Check copyright tags and skip results the user cannot use
1527: my (undef,undef,$resdom,$resname) = split('/',
1528: $Metadata->{'url'});
1529: # Check for priv
1530: if (($Metadata->{'copyright'} eq 'priv') &&
1531: (($ENV{'user.name'} ne $resname) &&
1532: ($ENV{'user.domain'} ne $resdom))) {
1533: return 0;
1534: }
1535: # Check for domain
1536: if (($Metadata->{'copyright'} eq 'domain') &&
1537: ($ENV{'user.domain'} ne $resdom)) {
1538: return 0;
1539: }
1540: return 1;
1541: }
1542:
1543: ######################################################################
1544: ######################################################################
1545:
1546: =pod
1547:
1548: =item &ensure_db_and_table()
1549:
1550: Ensure we can get lonmysql to connect to the database and the table we
1551: need exists.
1552:
1553: Inputs: $r, table id
1554:
1555: Returns: undef on error, 1 if the table exists.
1556:
1557: =cut
1558:
1559: ######################################################################
1560: ######################################################################
1561: sub ensure_db_and_table {
1562: my ($r,$table) = @_;
1563: ##
1564: ## Sanity check the table id.
1565: ##
1566: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1567: $r->print("Unable to retrieve search results. ".
1568: "Unable to determine the table results were stored in. ".
1569: "</body></html>");
1570: return undef;
1571: }
1572: ##
1573: ## Make sure we can connect and the table exists.
1574: ##
1575: my $connection_result = &Apache::lonmysql::connect_to_db();
1576: if (!defined($connection_result)) {
1577: $r->print("Unable to connect to the MySQL database where your results".
1578: " are stored. </body></html>");
1579: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1580: " connect to database.");
1581: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1582: return undef;
1583: }
1584: my $table_check = &Apache::lonmysql::check_table($table);
1585: if (! defined($table_check)) {
1586: $r->print("A MySQL error has occurred.</form></body></html>");
1587: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1588: " of table ".$table);
1589: return undef;
1590: } elsif (! $table_check) {
1591: $r->print("The table of results could not be found.");
1592: &Apache::lonnet::logthis("The user requested a table, ".$table.
1593: ", that could not be found.");
1594: return undef;
1595: }
1596: return 1;
1597: }
1598:
1599: ######################################################################
1600: ######################################################################
1601:
1602: =pod
1603:
1604: =item &print_sort_form()
1605:
1606: The sort feature is not implemented at this time. This form just prints
1607: a link to change the search query.
1608:
1609: =cut
1610:
1611: ######################################################################
1612: ######################################################################
1613: sub print_sort_form {
1614: my ($r,$pretty_query_string) = @_;
1615: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1616: ##
1617: my %SortableFields=&Apache::lonlocal::texthash(
1618: id => 'Default',
1619: title => 'Title',
1620: author => 'Author',
1621: subject => 'Subject',
1622: url => 'URL',
1623: version => 'Version Number',
1624: mime => 'Mime type',
1625: lang => 'Language',
1626: owner => 'Owner/Publisher',
1627: copyright => 'Copyright',
1628: hostname => 'Host',
1629: creationdate => 'Creation Date',
1630: lastrevisiondate => 'Revision Date'
1631: );
1632: ##
1633: my $table = $ENV{'form.table'};
1634: return if (! &ensure_db_and_table($r,$table));
1635: ##
1636: ## Get the number of results
1637: ##
1638: my $total_results = &Apache::lonmysql::number_of_rows($table);
1639: if (! defined($total_results)) {
1640: $r->print("A MySQL error has occurred.</form></body></html>");
1641: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1642: " of rows in table ".$table);
1643: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1644: return;
1645: }
1646: my $result;
1647: $result.=<<END;
1648: <html>
1649: <head>
1650: <script>
1651: function change_sort() {
1652: var newloc = "/adm/searchcat?phase=results";
1653: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1654: newloc += "&sortby=";
1655: newloc += document.forms.statusform.elements.sortby.value;
1656: parent.resultsframe.location= newloc;
1657: }
1658: </script>
1659: <title>Results</title>
1660: </head>
1661: $bodytag
1662: <form name="statusform" action="" method="post">
1663: <input type="hidden" name="Queue" value="" />
1664: END
1665:
1666: #<h2>Sort Results</h2>
1667: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1668: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1669: # foreach (keys(%SortableFields)) {
1670: # $result.="<option name=\"$_\"";
1671: # if ($_ eq $ENV{'form.sortby'}) {
1672: # $result.=" selected ";
1673: # }
1674: # $result.=" >$SortableFields{$_}</option>\n";
1675: # }
1676: # $result.="</select>\n";
1677: my $revise = &revise_button();
1678: $result.=<<END;
1679: <p>
1680: There are $total_results matches to your query. $revise
1681: </p><p>
1682: Search:$pretty_query_string
1683: </p>
1684: </form>
1685: </body>
1686: </html>
1687: END
1688: $r->print($result);
1689: return;
1690: }
1691:
1692: #####################################################################
1693: #####################################################################
1694:
1695: =pod
1696:
1697: =item MySQL Table Description
1698:
1699: MySQL table creation requires a precise description of the data to be
1700: stored. The use of the correct types to hold data is vital to efficient
1701: storage and quick retrieval of records. The columns must be described in
1702: the following format:
1703:
1704: =cut
1705:
1706: #####################################################################
1707: #####################################################################
1708: #
1709: # These should probably be scoped but I don't have time right now...
1710: #
1711: my @Datatypes;
1712: my @Fullindicies;
1713:
1714: ######################################################################
1715: ######################################################################
1716:
1717: =pod
1718:
1719: =item &create_results_table()
1720:
1721: Creates the table of search results by calling lonmysql. Stores the
1722: table id in $ENV{'form.table'}
1723:
1724: Inputs: none.
1725:
1726: Returns: the identifier of the table on success, undef on error.
1727:
1728: =cut
1729:
1730: ######################################################################
1731: ######################################################################
1732: sub set_up_table_structure {
1733: my ($datatypes,$fullindicies) =
1734: &LONCAPA::lonmetadata::describe_metadata_storage();
1735: # Copy the table description before modifying it...
1736: @Datatypes = @{$datatypes};
1737: unshift(@Datatypes,{name => 'id',
1738: type => 'MEDIUMINT',
1739: restrictions => 'UNSIGNED NOT NULL',
1740: primary_key => 'yes',
1741: auto_inc => 'yes' });
1742: @Fullindicies = @{$fullindicies};
1743: return;
1744: }
1745:
1746: sub create_results_table {
1747: &set_up_table_structure();
1748: my $table = &Apache::lonmysql::create_table
1749: ( { columns => \@Datatypes,
1750: FULLTEXT => [{'columns' => \@Fullindicies},],
1751: } );
1752: if (defined($table)) {
1753: $ENV{'form.table'} = $table;
1754: return $table;
1755: }
1756: return undef; # Error...
1757: }
1758:
1759: ######################################################################
1760: ######################################################################
1761:
1762: =pod
1763:
1764: =item Search Status update functions
1765:
1766: Each of the following functions changes the values of one of the
1767: input fields used to display the search status to the user. The names
1768: should be explanatory.
1769:
1770: Inputs: Apache request handler ($r), text to display.
1771:
1772: Returns: Nothing.
1773:
1774: =over 4
1775:
1776: =item &update_count_status()
1777:
1778: =item &update_status()
1779:
1780: =item &update_seconds()
1781:
1782: =back
1783:
1784: =cut
1785:
1786: ######################################################################
1787: ######################################################################
1788: sub update_count_status {
1789: my ($r,$text) = @_;
1790: $text =~ s/\'/\\\'/g;
1791: $r->print
1792: ("<script>document.statusform.count.value = ' $text'</script>\n");
1793: $r->rflush();
1794: }
1795:
1796: sub update_status {
1797: my ($r,$text) = @_;
1798: $text =~ s/\'/\\\'/g;
1799: $r->print
1800: ("<script>document.statusform.status.value = ' $text'</script>\n");
1801: $r->rflush();
1802: }
1803:
1804: sub update_seconds {
1805: my ($r,$text) = @_;
1806: $text =~ s/\'/\\\'/g;
1807: $r->print
1808: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1809: $r->rflush();
1810: }
1811:
1812: ######################################################################
1813: ######################################################################
1814:
1815: =pod
1816:
1817: =item &revise_button()
1818:
1819: Inputs: None
1820:
1821: Returns: html string for a 'revise search' button.
1822:
1823: =cut
1824:
1825: ######################################################################
1826: ######################################################################
1827: sub revise_button {
1828: my $revise_phase = 'disp_basic';
1829: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1830: my $newloc = '/adm/searchcat'.
1831: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1832: '&cleargroupsort=1'.
1833: '&phase='.$revise_phase;
1834: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1835: qq{ onClick="parent.location='$newloc';" /> };
1836: return $result;
1837: }
1838:
1839: ######################################################################
1840: ######################################################################
1841:
1842: =pod
1843:
1844: =item &run_search()
1845:
1846: Executes a search query by sending it the the other servers and putting the
1847: results into MySQL.
1848:
1849: =cut
1850:
1851: ######################################################################
1852: ######################################################################
1853: sub run_search {
1854: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1855: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1856: my $connection = $r->connection;
1857: #
1858: # Timing variables
1859: #
1860: my $starttime = time;
1861: my $max_time = 30; # seconds for the search to complete
1862: #
1863: # Print run_search header
1864: #
1865: $r->print(<<END);
1866: <html>
1867: <head><title>Search Status</title></head>
1868: $bodytag
1869: <form name="statusform" action="" method="post">
1870: <input type="hidden" name="Queue" value="" />
1871: END
1872: # Check to see if $pretty_string has more than one carriage return.
1873: # Assume \n s are following <br /> s and truncate the value.
1874: # (there is probably a better way)...
1875: my @Lines = split /<br \/>/,$pretty_string;
1876: if (@Lines > 2) {
1877: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1878: }
1879: $r->print(&mt("Search").": ".$pretty_string);
1880: $r->rflush();
1881: #
1882: # Determine the servers we need to contact.
1883: my @Servers_to_contact;
1884: if (defined($serverlist)) {
1885: if (ref($serverlist) eq 'ARRAY') {
1886: @Servers_to_contact = @$serverlist;
1887: } else {
1888: @Servers_to_contact = ($serverlist);
1889: }
1890: } else {
1891: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1892: }
1893: my %Server_status;
1894: my $table =$ENV{'form.table'};
1895: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1896: $r->print("Unable to determine table id to store search results in.".
1897: "The search has been aborted.</body></html>");
1898: return;
1899: }
1900: my $table_status = &Apache::lonmysql::check_table($table);
1901: if (! defined($table_status)) {
1902: $r->print("Unable to determine status of table.</body></html>");
1903: &Apache::lonnet::logthis("Bogus table id of $table for ".
1904: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1905: &Apache::lonnet::logthis("lonmysql error = ".
1906: &Apache::lonmysql::get_error());
1907: return;
1908: }
1909: if (! $table_status) {
1910: &Apache::lonnet::logthis("lonmysql error = ".
1911: &Apache::lonmysql::get_error());
1912: &Apache::lonnet::logthis("lonmysql debug = ".
1913: &Apache::lonmysql::get_debug());
1914: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
1915: $r->print("The table id,$table, we tried to use is invalid.".
1916: "The search has been aborted.</body></html>");
1917: return;
1918: }
1919: ##
1920: ## Prepare for the big loop.
1921: my $hitcountsum;
1922: my $server;
1923: my $status;
1924: my $revise = &revise_button();
1925: $r->print(<<END);
1926: <table>
1927: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1928: <tr>
1929: <td><input type="text" name="status" value="" size="30" /></td>
1930: <td><input type="text" name="count" value="" size="10" /></td>
1931: <td><input type="text" name="seconds" value="" size="8" /></td>
1932: <td>$revise</td>
1933: </tr>
1934: </table>
1935: </form>
1936: END
1937: $r->rflush();
1938: my $time_remaining = $max_time - (time - $starttime) ;
1939: $time_remaining = 0 if ($time_remaining <0);
1940: my $last_time = $time_remaining;
1941: &update_seconds($r,$time_remaining);
1942: &update_status($r,'contacting '.$Servers_to_contact[0]);
1943: while (($time_remaining > 0) &&
1944: ((@Servers_to_contact) || keys(%Server_status))) {
1945: $time_remaining = $max_time - (time - $starttime) ;
1946: &update_seconds($r,$time_remaining);
1947: # Send out a search request if it needs to be done.
1948: if (@Servers_to_contact) {
1949: # Contact one server
1950: my $server = shift(@Servers_to_contact);
1951: &update_status($r,&mt('contacting').' '.$server);
1952: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1953: $customshow,[$server]);
1954: ($server) = keys(%$reply);
1955: $Server_status{$server} = $reply->{$server};
1956: } else {
1957: # wait a sec. to give time for files to be written
1958: # This sleep statement is here instead of outside the else
1959: # block because we do not want to pause if we have servers
1960: # left to contact.
1961: if (scalar (keys(%Server_status))) {
1962: &update_status($r,
1963: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1964: }
1965: sleep(1);
1966: }
1967: #
1968: # Loop through the servers we have contacted but do not
1969: # have results from yet, looking for results.
1970: while (my ($server,$status) = each(%Server_status)) {
1971: last if ($connection->aborted());
1972: $time_remaining = $max_time - (time - $starttime) ;
1973: $time_remaining = 0 if ($time_remaining < 0);
1974: if ($last_time - $time_remaining > 0) {
1975: $last_time = $time_remaining;
1976: &update_seconds($r,$time_remaining);
1977: }
1978: if ($status eq 'con_lost') {
1979: delete ($Server_status{$server});
1980: next;
1981: }
1982: $status=~/^([\.\w]+)$/;
1983: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1984: if (-e $datafile && ! -e "$datafile.end") {
1985: &update_status($r,&mt('Receiving results from').' '.$server);
1986: next;
1987: }
1988: last if ($connection->aborted());
1989: if (-e "$datafile.end") {
1990: &update_status($r,&mt('Reading results from').' '.$server);
1991: if (-z "$datafile") {
1992: delete($Server_status{$server});
1993: next;
1994: }
1995: my $fh;
1996: if (!($fh=Apache::File->new($datafile))) {
1997: $r->print("Unable to open search results file for ".
1998: "server $server. Omitting from search");
1999: delete($Server_status{$server});
2000: next;
2001: }
2002: # Read in the whole file.
2003: while (my $result = <$fh>) {
2004: last if ($connection->aborted());
2005: # handle custom fields? Someday we will!
2006: chomp($result);
2007: next unless $result;
2008: # Parse the result.
2009: my %Fields = &parse_raw_result($result,$server);
2010: $Fields{'hostname'} = $server;
2011: next if (! ©right_check(\%Fields));
2012: # Store the result in the mysql database
2013: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2014: if (! defined($result)) {
2015: $r->print(&Apache::lonmysql::get_error());
2016: }
2017: # $r->print(&Apache::lonmysql::get_debug());
2018: $hitcountsum ++;
2019: $time_remaining = $max_time - (time - $starttime) ;
2020: $time_remaining = 0 if ($time_remaining < 0);
2021: if ($last_time - $time_remaining > 0) {
2022: &update_seconds($r,$time_remaining);
2023: $last_time = $time_remaining;
2024: }
2025: if ($hitcountsum % 50 == 0) {
2026: &update_count_status($r,$hitcountsum);
2027: }
2028: } # End of foreach (@results)
2029: $fh->close();
2030: # $server is only deleted if the results file has been
2031: # found and (successfully) opened. This may be a bad idea.
2032: delete($Server_status{$server});
2033: }
2034: last if ($connection->aborted());
2035: &update_count_status($r,$hitcountsum);
2036: }
2037: last if ($connection->aborted());
2038: # Finished looping through the servers
2039: $starttime = time if (@Servers_to_contact);
2040: $time_remaining = $max_time - (time - $starttime) ;
2041: if ($last_time - $time_remaining > 0) {
2042: $last_time = $time_remaining;
2043: &update_seconds($r,$time_remaining);
2044: }
2045: }
2046: &update_status($r,&mt('Search Complete').$server);
2047: &update_seconds($r,0);
2048: #
2049: &Apache::lonmysql::disconnect_from_db();
2050: #
2051: # We have run out of time or run out of servers to talk to and
2052: # results to get.
2053: $r->print("</body></html>");
2054: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2055: $r->print("<script>".
2056: "window.location='/adm/searchcat?".
2057: "phase=sort&".
2058: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2059: "</script>");
2060: }
2061: return;
2062: }
2063:
2064: ######################################################################
2065: ######################################################################
2066:
2067: =pod
2068:
2069: =item &prev_next_buttons()
2070:
2071: Returns html for the previous and next buttons on the search results page.
2072:
2073: =cut
2074:
2075: ######################################################################
2076: ######################################################################
2077: sub prev_next_buttons {
2078: my ($current_min,$show,$total,$parms) = @_;
2079: return '' if ($show eq 'all'); # No links if you get them all at once.
2080: my $links;
2081: ##
2082: ## Prev
2083: my $prev_min = $current_min - $show;
2084: $prev_min = 1 if $prev_min < 1;
2085: if ($prev_min < $current_min) {
2086: $links .=
2087: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
2088: &mt('prev').'</a>';
2089: } else {
2090: $links .= &mt('prev');
2091: }
2092: ##
2093: ## Pages.... Someday.
2094: ##
2095: $links .=
2096: qq{
2097: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
2098: &mt('reload').'</a>';
2099: ##
2100: ## Next
2101: my $next_min = $current_min + $show;
2102: $next_min = $current_min if ($next_min > $total);
2103: if ($next_min != $current_min) {
2104: $links .=
2105: qq{
2106: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
2107: &mt('next').'</a>';
2108: } else {
2109: $links .= ' '.&mt('next');
2110: }
2111: return $links;
2112: }
2113:
2114: ######################################################################
2115: ######################################################################
2116:
2117: =pod
2118:
2119: =item &display_results()
2120:
2121: Prints the results out for selection and perusal.
2122:
2123: =cut
2124:
2125: ######################################################################
2126: ######################################################################
2127: sub display_results {
2128: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2129: my $connection = $r->connection;
2130: $r->print(&search_results_header($importbutton,$closebutton));
2131: ##
2132: ## Set viewing function
2133: ##
2134: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2135: if (!defined($viewfunction)) {
2136: $r->print("Internal Error - Bad view selected.\n");
2137: $r->rflush();
2138: return;
2139: }
2140: ##
2141: ## $checkbox_num is a count of the number of checkboxes output on the
2142: ## page this is used only during catalogmode=groupsearch.
2143: my $checkbox_num = 0;
2144: ##
2145: ## Get the catalog controls setup
2146: ##
2147: my $action = "/adm/searchcat?phase=results";
2148: ##
2149: ## Deal with groupsearch by opening the groupsearch db file.
2150: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2151: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2152: &GDBM_WRCREAT(),0640)) {
2153: $r->print('Unable to store import results.</form></body></html>');
2154: $r->rflush();
2155: return;
2156: }
2157: }
2158: ##
2159: ## Prepare the table for querying
2160: my $table = $ENV{'form.table'};
2161: return if (! &ensure_db_and_table($r,$table));
2162: ##
2163: ## Get the number of results
2164: my $total_results = &Apache::lonmysql::number_of_rows($table);
2165: if (! defined($total_results)) {
2166: $r->print("A MySQL error has occurred.</form></body></html>");
2167: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2168: " of rows in table ".$table);
2169: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2170: return;
2171: }
2172: ##
2173: ## Determine how many results we need to get
2174: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2175: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2176: my $min = $ENV{'form.start'};
2177: my $max;
2178: if ($ENV{'form.show'} eq 'all') {
2179: $max = $total_results ;
2180: } else {
2181: $max = $min + $ENV{'form.show'} - 1;
2182: $max = $total_results if ($max > $total_results);
2183: }
2184: ##
2185: ## Output links (if necessary) for 'prev' and 'next' pages.
2186: $r->print
2187: ('<center>'.
2188: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2189: "table=".$ENV{'form.table'}.
2190: "&phase=results".
2191: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2192: ."</center>\n"
2193: );
2194: if ($total_results == 0) {
2195: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2196: '<h3>'.&mt('There are currently no results').'.</h3>'.
2197: "</form></body></html>");
2198: return;
2199: } else {
2200: $r->print
2201: ("<center>Results $min to $max out of $total_results</center>\n");
2202: }
2203: ##
2204: ## Get results from MySQL table
2205: my @Results = &Apache::lonmysql::get_rows($table,
2206: 'id>='.$min.' AND id<='.$max);
2207: ##
2208: ## Loop through the results and output them.
2209: foreach my $row (@Results) {
2210: if ($connection->aborted()) {
2211: &cleanup();
2212: return;
2213: }
2214: my %Fields = %{&parse_row(@$row)};
2215: my $output="<p>\n";
2216: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2217: $Fields{'title'} = 'Untitled';
2218: }
2219: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2220: $Fields{'id'},$checkbox_num++);
2221:
2222: # Render the result into html
2223: $output.= &$viewfunction($prefix,%Fields);
2224: # Print them out as they come in.
2225: $r->print($output);
2226: $r->rflush();
2227: }
2228: if (@Results < 1) {
2229: $r->print(&mt("There were no results matching your query"));
2230: } else {
2231: $r->print
2232: ('<center>'.
2233: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2234: "table=".$ENV{'form.table'}.
2235: "&phase=results".
2236: "&persistent_db_id=".
2237: $ENV{'form.persistent_db_id'})
2238: ."</center>\n"
2239: );
2240: }
2241: $r->print("</form></body></html>");
2242: $r->rflush();
2243: untie %groupsearch_db if (tied(%groupsearch_db));
2244: return;
2245: }
2246:
2247: ######################################################################
2248: ######################################################################
2249:
2250: =pod
2251:
2252: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2253:
2254: Returns html needed for the various catalog modes. Gets inputs from
2255: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2256:
2257: =cut
2258:
2259: ######################################################################
2260: ######################################################################
2261: sub catalogmode_output {
2262: my $output = '';
2263: my ($title,$url,$fnum,$checkbox_num) = @_;
2264: if ($ENV{'form.catalogmode'} eq 'interactive') {
2265: $title=~ s/\'/\\\'/g;
2266: if ($ENV{'form.catalogmode'} eq 'interactive') {
2267: $output.=<<END
2268: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2269: onClick="javascript:select_data('$title','$url')">
2270: </font>
2271: END
2272: }
2273: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2274: $groupsearch_db{"pre_${fnum}_link"}=$url;
2275: $groupsearch_db{"pre_${fnum}_title"}=$title;
2276: $output.=<<END;
2277: <font size='-1'>
2278: <input type="checkbox" name="returnvalues" value="SELECT"
2279: onClick="javascript:queue($checkbox_num,$fnum)" />
2280: </font>
2281: END
2282: }
2283: return $output;
2284: }
2285: ######################################################################
2286: ######################################################################
2287:
2288: =pod
2289:
2290: =item &parse_row()
2291:
2292: Parse a row returned from the database.
2293:
2294: =cut
2295:
2296: ######################################################################
2297: ######################################################################
2298: sub parse_row {
2299: my @Row = @_;
2300: my %Fields;
2301: if (! scalar(@Datatypes)) {
2302: &set_up_table_structure();
2303: }
2304: for (my $i=0;$i<=$#Row;$i++) {
2305: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2306: }
2307: $Fields{'language'} =
2308: &Apache::loncommon::languagedescription($Fields{'language'});
2309: $Fields{'copyrighttag'} =
2310: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2311: $Fields{'mimetag'} =
2312: &Apache::loncommon::filedescription($Fields{'mime'});
2313: return \%Fields;
2314: }
2315:
2316: ###########################################################
2317: ###########################################################
2318:
2319: =pod
2320:
2321: =item &parse_raw_result()
2322:
2323: Takes a line from the file of results and parse it. Returns a hash
2324: with keys according to column labels
2325:
2326: In addition, the following tags are set by calling the appropriate
2327: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2328:
2329: The 'title' field is set to "Untitled" if the title field is blank.
2330:
2331: 'abstract' and 'keywords' are truncated to 200 characters.
2332:
2333: =cut
2334:
2335: ###########################################################
2336: ###########################################################
2337: sub parse_raw_result {
2338: my ($result,$hostname) = @_;
2339: # conclude from self to others regarding fields
2340: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2341: (map {
2342: &Apache::lonnet::unescape($_);
2343: } (split(/\,/,$result)) );
2344: return %Fields;
2345: }
2346:
2347: ###########################################################
2348: ###########################################################
2349:
2350: =pod
2351:
2352: =item &handle_custom_fields()
2353:
2354: =cut
2355:
2356: ###########################################################
2357: ###########################################################
2358: sub handle_custom_fields {
2359: my @results = @{shift()};
2360: my $customshow='';
2361: my $extrashow='';
2362: my @customfields;
2363: if ($ENV{'form.customshow'}) {
2364: $customshow=$ENV{'form.customshow'};
2365: $customshow=~s/[^\w\s]//g;
2366: my @fields=map {
2367: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2368: } split(/\s+/,$customshow);
2369: @customfields=split(/\s+/,$customshow);
2370: if ($customshow) {
2371: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2372: }
2373: }
2374: my $customdata='';
2375: my %customhash;
2376: foreach my $result (@results) {
2377: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2378: my $tmp=$result;
2379: $tmp=~s/^custom\=//;
2380: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2381: } split(/\,/,$tmp);
2382: $customhash{$k}=$v;
2383: }
2384: }
2385: return ($extrashow,\@customfields,\%customhash);
2386: }
2387:
2388: ######################################################################
2389: ######################################################################
2390:
2391: =pod
2392:
2393: =item &search_results_header()
2394:
2395: Output the proper html headers and javascript code to deal with different
2396: calling modes.
2397:
2398: Takes most inputs directly from %ENV, except $mode.
2399:
2400: =over 4
2401:
2402: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2403:
2404: =back
2405:
2406: The following environment variables are checked:
2407:
2408: =over 4
2409:
2410: =item 'form.catalogmode'
2411:
2412: Checked for 'interactive' and 'groupsearch'.
2413:
2414: =item 'form.mode'
2415:
2416: Checked for existance & 'edit' mode.
2417:
2418: =item 'form.form'
2419:
2420: Contains the name of the form that has the input fields to set
2421:
2422: =item 'form.element'
2423:
2424: the name of the input field to put the URL into
2425:
2426: =item 'form.titleelement'
2427:
2428: the name of the input field to put the title into
2429:
2430: =back
2431:
2432: =cut
2433:
2434: ######################################################################
2435: ######################################################################
2436: sub search_results_header {
2437: my ($importbutton,$closebutton) = @_;
2438: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2439: my $result = '';
2440: # output beginning of search page
2441: # conditional output of script functions dependent on the mode in
2442: # which the search was invoked
2443: if ($ENV{'form.catalogmode'} eq 'interactive'){
2444: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2445: $result.=<<SCRIPT;
2446: <script type="text/javascript">
2447: function select_data(title,url) {
2448: changeTitle(title);
2449: changeURL(url);
2450: parent.close();
2451: }
2452: function changeTitle(val) {
2453: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2454: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2455: }
2456: }
2457: function changeURL(val) {
2458: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2459: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2460: }
2461: }
2462: </script>
2463: SCRIPT
2464: } elsif ($ENV{'form.mode'} eq 'edit') {
2465: my $form = $ENV{'form.form'};
2466: my $element = $ENV{'form.element'};
2467: my $titleelement = $ENV{'form.titleelement'};
2468: my $changetitle;
2469: if (!$titleelement) {
2470: $changetitle='function changeTitle(val) {}';
2471: } else {
2472: $changetitle=<<END;
2473: function changeTitle(val) {
2474: if (parent.targetwin.document) {
2475: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2476: } else {
2477: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2478: alert("Unable to transfer data to "+url);
2479: }
2480: }
2481: END
2482: }
2483:
2484: $result.=<<SCRIPT;
2485: <script type="text/javascript">
2486: function select_data(title,url) {
2487: changeURL(url);
2488: changeTitle(title);
2489: parent.close();
2490: }
2491: $changetitle
2492: function changeURL(val) {
2493: if (parent.targetwin.document) {
2494: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2495: } else {
2496: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2497: alert("Unable to transfer data to "+url);
2498: }
2499: }
2500: </script>
2501: SCRIPT
2502: }
2503: }
2504: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2505: <script type="text/javascript">
2506: function queue(checkbox_num,val) {
2507: if (document.forms.results.returnvalues.length != "undefined" &&
2508: typeof(document.forms.results.returnvalues.length) == "number") {
2509: if (document.forms.results.returnvalues[checkbox_num].checked) {
2510: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2511: } else {
2512: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2513: }
2514: } else {
2515: if (document.forms.results.returnvalues.checked) {
2516: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2517: } else {
2518: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2519: }
2520: }
2521: }
2522: function select_group() {
2523: parent.window.location=
2524: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2525: parent.statusframe.document.forms.statusform.elements.Queue.value;
2526: }
2527: </script>
2528: SCRIPT
2529: $result.=<<END;
2530: </head>
2531: $bodytag
2532: <form name="results" method="post" action="" >
2533: <input type="hidden" name="Queue" value="" />
2534: $importbutton
2535: END
2536: return $result;
2537: }
2538:
2539: ######################################################################
2540: ######################################################################
2541: sub search_status_header {
2542: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2543: return <<ENDSTATUS;
2544: <html><head><title>Search Status</title></head>
2545: $bodytag
2546: <h3>Search Status</h3>
2547: Sending search request to LON-CAPA servers.<br />
2548: ENDSTATUS
2549: }
2550:
2551: sub results_link {
2552: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2553: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2554: my $results_link = $basic_link."&phase=results".
2555: "&pause=1"."&start=1";
2556: return $results_link;
2557: }
2558:
2559: ######################################################################
2560: ######################################################################
2561: sub print_frames_interface {
2562: my $r = shift;
2563: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2564: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2565: my $run_search_link = $basic_link."&phase=run_search";
2566: my $results_link = &results_link();
2567: my $result = <<"ENDFRAMES";
2568: <html>
2569: <head>
2570: <script>
2571: var targetwin = opener;
2572: var queue = '';
2573: </script>
2574: <title>LON-CAPA Digital Library Search Results</title>
2575: </head>
2576: <frameset rows="150,*">
2577: <frame name="statusframe" src="$run_search_link">
2578: <frame name="resultsframe" src="$results_link">
2579: </frameset>
2580: </html>
2581: ENDFRAMES
2582:
2583: $r->print($result);
2584: return;
2585: }
2586:
2587: ######################################################################
2588: ######################################################################
2589:
2590: =pod
2591:
2592: =item Metadata Viewing Functions
2593:
2594: Output is a HTML-ified string.
2595:
2596: Input arguments are title, author, subject, url, keywords, version,
2597: notes, short abstract, mime, language, creation date,
2598: last revision date, owner, copyright, hostname, and
2599: extra custom metadata to show.
2600:
2601: =over 4
2602:
2603: =item &detailed_citation_view()
2604:
2605: =cut
2606:
2607: ######################################################################
2608: ######################################################################
2609: sub detailed_citation_view {
2610: my ($prefix,%values) = @_;
2611: my $icon=&Apache::loncommon::icon($values{'url'});
2612: my $result=<<END;
2613: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2614: target='search_preview'>$values{'title'}</a></b>
2615: <p>
2616: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2617:
2618: <b>Subject: </b> $values{'subject'}<br />
2619: <b>Keyword(s): </b> $values{'keywords'}<br />
2620: <b>Notes: </b> $values{'notes'}<br />
2621: <b>MIME Type: </b> $values{'mimetag'}<br />
2622: <b>Language: </b> $values{'language'}<br />
2623: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2624: </p>
2625: $values{'extrashow'}
2626: <p>
2627: $values{'shortabstract'}
2628: </p>
2629: <hr align='left' width='200' noshade />
2630: END
2631: return $result;
2632: }
2633:
2634: ######################################################################
2635: ######################################################################
2636:
2637: =pod
2638:
2639: =item &summary_view()
2640:
2641: =cut
2642: ######################################################################
2643: ######################################################################
2644: sub summary_view {
2645: my ($prefix,%values) = @_;
2646: my $icon=&Apache::loncommon::icon($values{'url'});
2647: my $result=<<END;
2648: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2649: target='search_preview'>$values{'author'}</a><br />
2650: $values{'title'}<br />
2651: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2652: $values{'copyrighttag'}<br />
2653: $values{'extrashow'}
2654: </p>
2655: <hr align='left' width='200' noshade />
2656: END
2657: return $result;
2658: }
2659:
2660: ######################################################################
2661: ######################################################################
2662:
2663: =pod
2664:
2665: =item &compact_view()
2666:
2667: =cut
2668:
2669: ######################################################################
2670: ######################################################################
2671: sub compact_view {
2672: my ($prefix,%values) = @_;
2673: my $icon=&Apache::loncommon::icon($values{'url'});
2674: my $result=<<END;
2675: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2676: $values{'title'}</a>
2677: <b>$values{'author'}</b><br />
2678: END
2679: return $result;
2680: }
2681:
2682:
2683: ######################################################################
2684: ######################################################################
2685:
2686: =pod
2687:
2688: =item &fielded_format_view()
2689:
2690: =cut
2691:
2692: ######################################################################
2693: ######################################################################
2694: sub fielded_format_view {
2695: my ($prefix,%values) = @_;
2696: my $icon=&Apache::loncommon::icon($values{'url'});
2697: my $result=<<END;
2698: $prefix <img src="$icon" />
2699: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2700: target='search_preview'>$values{'url'}</a>
2701: <br />
2702: <b>Title:</b> $values{'title'}<br />
2703: <b>Author(s):</b> $values{'author'}<br />
2704: <b>Subject:</b> $values{'subject'}<br />
2705: <b>Keyword(s):</b> $values{'keywords'}<br />
2706: <b>Notes:</b> $values{'notes'}<br />
2707: <b>MIME Type:</b> $values{'mimetag'}<br />
2708: <b>Language:</b> $values{'language'}<br />
2709: <b>Creation Date:</b> $values{'creationdate'}<br />
2710: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2711: <b>Publisher/Owner:</b> $values{'owner'}<br />
2712: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2713: <b>Repository Location:</b> $values{'hostname'}<br />
2714: <b>Abstract:</b> $values{'shortabstract'}<br />
2715: $values{'extrashow'}
2716: </p>
2717: <hr align='left' width='200' noshade />
2718: END
2719: return $result;
2720: }
2721:
2722: ######################################################################
2723: ######################################################################
2724:
2725: =pod
2726:
2727: =item &xml_sgml_view()
2728:
2729: =back
2730:
2731: =cut
2732:
2733: ######################################################################
2734: ######################################################################
2735: sub xml_sgml_view {
2736: my ($prefix,%values) = @_;
2737: my $xml = <<END;
2738: <LonCapaResource>
2739: <url>$values{'url'}</url>
2740: <title>$values{'title'}</title>
2741: <author>$values{'author'}</author>
2742: <subject>$values{'subject'}</subject>
2743: <keywords>$values{'keywords'}</keywords>
2744: <notes>$values{'notes'}</notes>
2745: <mimeInfo>
2746: <mime>$values{'mime'}</mime>
2747: <mimetag>$values{'mimetag'}</mimetag>
2748: </mimeInfo>
2749: <languageInfo>
2750: <language>$values{'language'}</language>
2751: <languagetag>$values{'languagetag'}</languagetag>
2752: </languageInfo>
2753: <creationdate>$values{'creationdate'}</creationdate>
2754: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2755: <owner>$values{'owner'}</owner>
2756: <copyrightInfo>
2757: <copyright>$values{'copyright'}</copyright>
2758: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2759: </copyrightInfo>
2760: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2761: <shortabstract>$values{'shortabstract'}</shortabstract>
2762: </LonCapaResource>
2763: END
2764: $xml = &HTML::Entities::encode($xml,'<>&');
2765: my $result=<<END;
2766: $prefix
2767: <pre>
2768: $xml
2769: </pre>
2770: $values{'extrashow'}
2771: <hr align='left' width='200' noshade />
2772: END
2773: return $result;
2774: }
2775:
2776: ######################################################################
2777: ######################################################################
2778:
2779: =pod
2780:
2781: =item &filled() see if field is filled.
2782:
2783: =cut
2784:
2785: ######################################################################
2786: ######################################################################
2787: sub filled {
2788: my ($field)=@_;
2789: if ($field=~/\S/ && $field ne 'any') {
2790: return 1;
2791: } else {
2792: return 0;
2793: }
2794: }
2795:
2796: ######################################################################
2797: ######################################################################
2798:
2799: =pod
2800:
2801: =item &output_blank_field_error()
2802:
2803: Output a complete page that indicates the user has not filled in enough
2804: information to do a search.
2805:
2806: Inputs: $r (Apache request handle), $closebutton, $parms.
2807:
2808: Returns: nothing
2809:
2810: $parms is extra information to include in the 'Revise search request' link.
2811:
2812: =cut
2813:
2814: ######################################################################
2815: ######################################################################
2816: sub output_blank_field_error {
2817: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2818: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2819: # make query information persistent to allow for subsequent revision
2820: $r->print(<<BEGINNING);
2821: <html>
2822: <head>
2823: <title>The LearningOnline Network with CAPA</title>
2824: BEGINNING
2825: $r->print(<<RESULTS);
2826: </head>
2827: $bodytag
2828: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2829: <h1>Search Catalog</h1>
2830: <form method="post" action="/adm/searchcat">
2831: $hidden_fields
2832: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2833: >Revise search request</a>
2834: $closebutton
2835: <hr />
2836: <h3>Unactionable search query.</h3>
2837: <p>
2838: You did not fill in enough information for the search to be started.
2839: You need to fill in relevant fields on the search page in order
2840: for a query to be processed.
2841: </p>
2842: </body>
2843: </html>
2844: RESULTS
2845: }
2846:
2847: ######################################################################
2848: ######################################################################
2849:
2850: =pod
2851:
2852: =item &output_date_error()
2853:
2854: Output a full html page with an error message.
2855:
2856: Inputs:
2857:
2858: $r, the request pointer.
2859: $message, the error message for the user.
2860: $closebutton, the specialized close button needed for groupsearch.
2861:
2862: =cut
2863:
2864: ######################################################################
2865: ######################################################################
2866: sub output_date_error {
2867: my ($r,$message,$closebutton,$hidden_fields)=@_;
2868: # make query information persistent to allow for subsequent revision
2869: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2870: $r->print(<<RESULTS);
2871: <html>
2872: <head>
2873: <title>The LearningOnline Network with CAPA</title>
2874: </head>
2875: $bodytag
2876: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2877: <h1>Search Catalog</h1>
2878: <form method="post" action="/adm/searchcat">
2879: $hidden_fields
2880: <input type='button' value='Revise search request'
2881: onClick='this.form.submit();' />
2882: $closebutton
2883: <hr />
2884: <h3>Error</h3>
2885: <p>
2886: $message
2887: </p>
2888: </body>
2889: </html>
2890: RESULTS
2891: }
2892:
2893: ######################################################################
2894: ######################################################################
2895:
2896: =pod
2897:
2898: =item &start_fresh_session()
2899:
2900: Cleans the global %groupsearch_db by removing all fields which begin with
2901: 'pre_' or 'store'.
2902:
2903: =cut
2904:
2905: ######################################################################
2906: ######################################################################
2907: sub start_fresh_session {
2908: delete $groupsearch_db{'mode_catalog'};
2909: foreach (keys %groupsearch_db) {
2910: if ($_ =~ /^pre_/) {
2911: delete $groupsearch_db{$_};
2912: }
2913: if ($_ =~ /^store/) {
2914: delete $groupsearch_db{$_};
2915: }
2916: }
2917: }
2918:
2919: 1;
2920:
2921: sub cleanup {
2922: if (tied(%groupsearch_db)) {
2923: unless (untie(%groupsearch_db)) {
2924: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2925: }
2926: }
2927: &untiehash();
2928: &Apache::lonmysql::disconnect_from_db();
2929: }
2930:
2931: __END__
2932:
2933: =pod
2934:
2935: =back
2936:
2937: =cut
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