1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.230.2.1 2005/01/19 20:22:36 albertel 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: use Parse::RecDescent;
79:
80: ######################################################################
81: ######################################################################
82: ##
83: ## Global variables
84: ##
85: ######################################################################
86: ######################################################################
87: my %groupsearch_db; # Database hash used to save values for the
88: # groupsearch RAT interface.
89: my %persistent_db; # gdbm hash which holds data which is supposed to
90: # persist across calls to lonsearchcat.pm
91:
92: # The different view modes and associated functions
93:
94: my %Views = ("detailed" => \&detailed_citation_view,
95: "summary" => \&summary_view,
96: "fielded" => \&fielded_format_view,
97: "xml" => \&xml_sgml_view,
98: "compact" => \&compact_view);
99:
100: ######################################################################
101: ######################################################################
102: sub handler {
103: my $r = shift;
104: # &set_defaults();
105: #
106: # set form defaults
107: #
108: my $hidden_fields;# Hold all the hidden fields used to keep track
109: # of the search system state
110: my $importbutton; # button to take the selected results and go to group
111: # sorting
112: my $diropendb; # The full path to the (temporary) search database file.
113: # This is set and used in &handler() and is also used in
114: # &output_results().
115: my $bodytag; # LON-CAPA standard body tag, gotten from
116: # &Apache::lonnet::bodytag.
117: # No title, no table, just a <body> tag.
118:
119: my $loaderror=&Apache::lonnet::overloaderror($r);
120: if ($loaderror) { return $loaderror; }
121: #
122: my $closebutton; # button that closes the search window
123: # This button is different for the RAT compared to
124: # normal invocation.
125: #
126: &Apache::loncommon::content_type($r,'text/html');
127: $r->send_http_header;
128: return OK if $r->header_only;
129: ##
130: ## Prevent caching of the search interface window. Hopefully this means
131: ## we will get the launch=1 passed in a little more.
132: &Apache::loncommon::no_cache($r);
133: ##
134: ## Pick up form fields passed in the links.
135: ##
136: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
137: ['catalogmode','launch','acts','mode','form','element','pause',
138: 'phase','persistent_db_id','table','start','show',
139: 'cleargroupsort','titleelement']);
140: ##
141: ## The following is a trick - we wait a few seconds if asked to so
142: ## the daemon running the search can get ahead of the daemon
143: ## printing the results. We only need (theoretically) to do
144: ## this once, so the pause indicator is deleted
145: ##
146: if (exists($ENV{'form.pause'})) {
147: sleep(1);
148: delete($ENV{'form.pause'});
149: }
150: ##
151: ## Initialize global variables
152: ##
153: my $domain = $r->dir_config('lonDefDomain');
154: $diropendb= "/home/httpd/perl/tmp/".
155: "$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
156: #
157: # set the name of the persistent database
158: # $ENV{'form.persistent_db_id'} can only have digits in it.
159: if (! exists($ENV{'form.persistent_db_id'}) ||
160: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
161: ($ENV{'form.launch'} eq '1')) {
162: $ENV{'form.persistent_db_id'} = time;
163: }
164: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
165: my $persistent_db_file = "/home/httpd/perl/tmp/".
166: &Apache::lonnet::escape($domain).
167: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
168: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
169: ##
170: &Apache::lonhtmlcommon::clear_breadcrumbs();
171: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
172: &Apache::lonhtmlcommon::add_breadcrumb
173: ({href=>'/adm/searchcat?'.
174: 'catalogmode='.$ENV{'form.catalogmode'}.
175: '&launch='.$ENV{'form.launch'}.
176: '&mode='.$ENV{'form.mode'},
177: text=>"Course and Catalog Search",
178: target=>'_top',
179: bug=>'Searching',});
180: } else {
181: &Apache::lonhtmlcommon::add_breadcrumb
182: ({href=>'/adm/searchcat?'.
183: 'catalogmode='.$ENV{'form.catalogmode'}.
184: '&launch='.$ENV{'form.launch'}.
185: '&mode='.$ENV{'form.mode'},
186: text=>"Catalog Search",
187: target=>'_top',
188: bug=>'Searching',});
189: }
190: #
191: if ($ENV{'form.phase'} !~ m/(basic|adv|course)_search/) {
192: if (! &get_persistent_form_data($persistent_db_file)) {
193: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
194: &Apache::lonnet::logthis('lonsearchcat:'.
195: 'Unable to recover data from '.
196: $persistent_db_file);
197: $r->print(<<END);
198: <html>
199: <head><title>LON-CAPA Search Error</title></head>
200: $bodytag
201: We were unable to retrieve data describing your search. This is a serious
202: error and has been logged. Please alert your LON-CAPA administrator.
203: </body>
204: </html>
205: END
206: return OK;
207: }
208: }
209: } else {
210: &clean_up_environment();
211: }
212: ##
213: ## Clear out old values from groupsearch database
214: ##
215: untie %groupsearch_db if (tied(%groupsearch_db));
216: if (($ENV{'form.cleargroupsort'} eq '1') ||
217: (($ENV{'form.launch'} eq '1') &&
218: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
219: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
220: &start_fresh_session();
221: untie %groupsearch_db;
222: delete($ENV{'form.cleargroupsort'});
223: } else {
224: # This is a stupid error to give to the user.
225: # It really tells them nothing.
226: $r->print('<html><head></head>'.$bodytag.
227: 'Unable to tie hash to db file</body></html>');
228: return OK;
229: }
230: }
231: ##
232: ## Configure hidden fields
233: ##
234: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
235: $ENV{'form.persistent_db_id'}.'" />'."\n";
236: if (exists($ENV{'form.catalogmode'})) {
237: $hidden_fields .= &hidden_field('catalogmode');
238: }
239: if (exists($ENV{'form.form'})) {
240: $hidden_fields .= &hidden_field('form');
241: }
242: if (exists($ENV{'form.element'})) {
243: $hidden_fields .= &hidden_field('element');
244: }
245: if (exists($ENV{'form.titleelement'})) {
246: $hidden_fields .= &hidden_field('titleelement');
247: }
248: if (exists($ENV{'form.mode'})) {
249: $hidden_fields .= &hidden_field('mode');
250: }
251: ##
252: ## Configure dynamic components of interface
253: ##
254: if ($ENV{'form.catalogmode'} eq 'interactive') {
255: $closebutton="<input type='button' name='close' value='CLOSE' ";
256: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
257: $closebutton .="onClick='parent.close()'";
258: } else {
259: $closebutton .="onClick='self.close()'";
260: }
261: $closebutton .=">\n";
262: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
263: $closebutton="<input type='button' name='close' value='CLOSE' ";
264: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
265: $closebutton .="onClick='parent.close()'";
266: } else {
267: $closebutton .="onClick='self.close()'";
268: }
269: $closebutton .= ">";
270: $importbutton=<<END;
271: <input type='button' name='import' value='IMPORT'
272: onClick='javascript:select_group()'>
273: END
274: } else {
275: $closebutton = '';
276: $importbutton = '';
277: }
278: ##
279: ## Sanity checks on form elements
280: ##
281: if (!defined($ENV{'form.viewselect'})) {
282: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
283: ($ENV{'form.catalogmode'} eq 'interactive')) {
284: $ENV{'form.viewselect'} ="Compact View";
285: } else {
286: $ENV{'form.viewselect'} ="Detailed Citation View";
287: }
288: }
289: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
290: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
291: #
292: $ENV{'form.searchmode'} = 'basic' if (! exists($ENV{'form.searchmode'}));
293: if ($ENV{'form.phase'} eq 'adv_search' ||
294: $ENV{'form.phase'} eq 'disp_adv') {
295: $ENV{'form.searchmode'} = 'advanced';
296: } elsif ($ENV{'form.phase'} eq 'course_search') {
297: $ENV{'form.searchmode'} = 'course_search';
298: }
299: #
300: if ($ENV{'form.searchmode'} eq 'advanced') {
301: &Apache::lonhtmlcommon::add_breadcrumb
302: ({href=>'/adm/searchcat?phase=disp_adv&'.
303: 'catalogmode='.$ENV{'form.catalogmode'}.
304: '&launch='.$ENV{'form.launch'}.
305: '&mode='.$ENV{'form.mode'},
306: text=>"Advanced Search",
307: bug=>'Searching',});
308: } elsif ($ENV{'form.searchmode'} eq 'course search') {
309: &Apache::lonhtmlcommon::add_breadcrumb
310: ({href=>'/adm/searchcat?phase=disp_adv&'.
311: 'catalogmode='.$ENV{'form.catalogmode'}.
312: '&launch='.$ENV{'form.launch'}.
313: '&mode='.$ENV{'form.mode'},
314: text=>"Course Search",
315: bug=>'Searching',});
316: }
317: ##
318: ## Switch on the phase
319: ##
320: if ($ENV{'form.phase'} eq 'disp_basic') {
321: &print_basic_search_form($r,$closebutton,$hidden_fields);
322: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
323: &print_advanced_search_form($r,$closebutton,$hidden_fields);
324: } elsif ($ENV{'form.phase'} eq 'results') {
325: &display_results($r,$importbutton,$closebutton,$diropendb);
326: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
327: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
328: &get_persistent_data($persistent_db_file,
329: ['query','customquery','customshow',
330: 'libraries','pretty_string']);
331: if ($ENV{'form.phase'} eq 'sort') {
332: &print_sort_form($r,$pretty_string);
333: } elsif ($ENV{'form.phase'} eq 'run_search') {
334: &run_search($r,$query,$customquery,$customshow,
335: $libraries,$pretty_string);
336: }
337: } elsif ($ENV{'form.phase'} eq 'course_search') {
338: &course_search($r);
339: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
340: ($ENV{'form.phase'} eq 'adv_search')) {
341: #
342: # We are running a search, try to parse it
343: my ($query,$customquery,$customshow,$libraries) =
344: (undef,undef,undef,undef);
345: my $pretty_string;
346: if ($ENV{'form.phase'} eq 'basic_search') {
347: ($query,$pretty_string,$libraries) =
348: &parse_basic_search($r,$closebutton,$hidden_fields);
349: return OK if (! defined($query));
350: &make_persistent({ basicexp => $ENV{'form.basicexp'}},
351: $persistent_db_file);
352: } else { # Advanced search
353: ($query,$customquery,$customshow,$libraries,$pretty_string)
354: = &parse_advanced_search($r,$closebutton,$hidden_fields);
355: return OK if (! defined($query));
356: }
357: &make_persistent({ query => $query,
358: customquery => $customquery,
359: customshow => $customshow,
360: libraries => $libraries,
361: pretty_string => $pretty_string },
362: $persistent_db_file);
363: #
364: # Set up table
365: if (! defined(&create_results_table())) {
366: my $errorstring=&Apache::lonmysql::get_error();
367: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
368: 'needed table. lonmysql error:'.
369: $errorstring);
370: $r->print(<<END);
371: <html><head><title>Search Error</title></head>
372: $bodytag
373: Unable to create table in which to store search results.
374: The search has been aborted.
375: </body>
376: </html>
377: END
378: return OK;
379: }
380: delete($ENV{'form.launch'});
381: if (! &make_form_data_persistent($r,$persistent_db_file)) {
382: $r->print(<<END);
383: <html><head><title>Search Error</title></head>
384: $bodytag
385: Unable to properly store search information. The search has been aborted.
386: </body>
387: </html>
388: END
389: return OK;
390: }
391: ##
392: ## Print out the frames interface
393: ##
394: if (defined($query)) {
395: &print_frames_interface($r);
396: }
397: }
398: return OK;
399: }
400:
401: #
402: # The mechanism used to store values away and retrieve them does not
403: # handle the case of missing environment variables being significant.
404: #
405: # This routine sets non existant checkbox form elements to ''.
406: #
407: sub clean_up_environment {
408: if ($ENV{'form.phase'} eq 'basic_search') {
409: if (! exists($ENV{'form.related'})) {
410: $ENV{'form.related'} = '';
411: }
412: if (! exists($ENV{'form.domains'})) {
413: $ENV{'form.domains'} = '';
414: }
415: } elsif ($ENV{'form.phase'} eq 'adv_search') {
416: foreach my $field ('title','keywords','notes',
417: 'abstract','standards','mime') {
418: if (! exists($ENV{'form.'.$field.'_related'})) {
419: $ENV{'form.'.$field.'_related'} = '';
420: }
421: }
422: } elsif ($ENV{'form.phase'} eq 'course_search') {
423: if (! exists($ENV{'form.crsrelated'})) {
424: $ENV{'form.crsrelated'} = '';
425: }
426: }
427: }
428:
429: sub hidden_field {
430: my ($name,$value) = @_;
431: if (! defined($value)) {
432: $value = $ENV{'form.'.$name};
433: }
434: return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
435: }
436:
437: ######################################################################
438: ######################################################################
439: ##
440: ## Course Search
441: ##
442: ######################################################################
443: ######################################################################
444: { # Scope the course search to avoid global variables
445: #
446: # Variables For course search
447: my %hash;
448: my $totalfound;
449:
450: sub make_symb {
451: my ($id)=@_;
452: my ($mapid,$resid)=split(/\./,$id);
453: my $map=$hash{'map_id_'.$mapid};
454: my $res=$hash{'src_'.$id};
455: my $symb=&Apache::lonnet::encode_symb($map,$resid,$res);
456: return $symb;
457: }
458:
459: sub course_search {
460: my $r=shift;
461: my $bodytag=&Apache::loncommon::bodytag('Course Search');
462: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
463: my $search_string = $ENV{'form.courseexp'};
464: my @New_Words;
465: if ($ENV{'form.crsrelated'}) {
466: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
467: if (@New_Words) {
468: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
469: } else {
470: $pretty_search_string .= ' '.&mt('with no related words').".";
471: }
472: }
473: my $fulltext=$ENV{'form.crsfulltext'};
474: my @allwords=($search_string,@New_Words);
475: $totalfound=0;
476: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
477: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
478: $r->rflush();
479: # ======================================================= Go through the course
480: my $c=$r->connection;
481: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
482: &GDBM_READER(),0640)) {
483: foreach (sort(keys(%hash))) {
484: if ($c->aborted()) { last; }
485: if (($_=~/^src\_(.+)$/)) {
486: if ($hash{'randomout_'.$1} & !$ENV{'request.role.adv'}) {
487: next;
488: }
489: my $symb=&make_symb($1);
490: &checkonthis($r,$1,$hash{$_},0,&Apache::lonnet::gettitle($symb),
491: $fulltext,$symb,@allwords);
492: }
493: }
494: untie(%hash);
495: }
496: unless ($totalfound) {
497: $r->print('<p>'.&mt('No resources found').'.</p>');
498: }
499: # =================================================== Done going through course
500: $r->print('</body></html>');
501: }
502:
503: # =============================== This pulls up a resource and its dependencies
504:
505: sub checkonthis {
506: my ($r,$id,$url,$level,$title,$fulltext,$symb,@allwords)=@_;
507: $r->rflush();
508:
509: my $result=$title.' ';
510: if ($ENV{'request.role.adv'} || !$hash{'encrypted_'.$id}) {
511: $result.=&Apache::lonnet::metadata($url,'title').' '.
512: &Apache::lonnet::metadata($url,'subject').' '.
513: &Apache::lonnet::metadata($url,'abstract').' '.
514: &Apache::lonnet::metadata($url,'keywords');
515: }
516: my ($extension)=($url=~/\.(\w+)$/);
517: if (&Apache::loncommon::fileembstyle($extension) eq 'ssi' &&
518: ($url) && ($fulltext)) {
519: $result.=&Apache::lonnet::ssi_body($url.'?symb='.&Apache::lonnet::escape($symb));
520: }
521: $result=~s/\s+/ /gs;
522: my $applies=0;
523: foreach (@allwords) {
524: if ($_=~/\w/) {
525: if ($result=~/$_/si) {
526: $applies++;
527: }
528: }
529: }
530: # Does this resource apply?
531: if ($applies) {
532: $r->print('<br />');
533: for (my $i=0;$i<=$level*5;$i++) {
534: $r->print(' ');
535: }
536: my $href=$url;
537: if ($hash{'encrypted_'.$id} && !$ENV{'request.role.adv'}) {
538: $href=&Apache::lonenc::encrypted($href)
539: .'?symb='.&Apache::lonenc::encrypted($symb);
540: } else {
541: $href.='?symb='.&Apache::lonnet::escape($symb);
542: }
543: $r->print('<a href="'.$href.'" target="cat">'.($title?$title:$url).
544: '</a><br />');
545: $totalfound++;
546: } elsif ($fulltext) {
547: $r->print(' .');
548: }
549: $r->rflush();
550: # Check also the dependencies of this one
551: my $dependencies=
552: &Apache::lonnet::metadata($url,'dependencies');
553: foreach (split(/\,/,$dependencies)) {
554: if (($_=~/^\/res\//)) {
555: &checkonthis($r,$id,$_,$level+1,'',$fulltext,undef,@allwords);
556: }
557: }
558: }
559:
560: sub untiehash {
561: if (tied(%hash)) {
562: untie(%hash);
563: }
564: }
565:
566: } # End of course search scoping
567:
568: sub search_html_header {
569: my $Str = <<ENDHEADER;
570: <html>
571: <head>
572: <title>The LearningOnline Network with CAPA</title>
573: </head>
574: ENDHEADER
575: return $Str;
576: }
577:
578: ######################################################################
579: ######################################################################
580:
581: =pod
582:
583: =item &print_basic_search_form()
584:
585: Prints the form for the basic search. Sorry the name is so cryptic.
586:
587: =cut
588:
589: ######################################################################
590: ######################################################################
591: sub print_basic_search_form {
592: my ($r,$closebutton,$hidden_fields) = @_;
593: my $result = ($ENV{'form.catalogmode'} ne 'groupsearch');
594: my $bodytag=&Apache::loncommon::bodytag('Search').
595: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Search_Basic',
596: undef,undef,
597: $ENV{'form.catalogmode'} ne 'groupsearch');
598: my $scrout = &search_html_header().$bodytag;
599: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
600: # Define interface components
601: my $userelatedwords=
602: &mt('[_1] use related words',
603: &Apache::lonhtmlcommon::checkbox
604: ('related',$ENV{'form.related'},'related'));
605: my $onlysearchdomain=
606: &mt('[_1] only search domain [_2]',
607: &Apache::lonhtmlcommon::checkbox('domains',
608: $ENV{'form.domains'},
609: $r->dir_config('lonDefDomain')
610: ),
611: $r->dir_config('lonDefDomain')
612: );
613: my $adv_search_link =
614: '<a href="/adm/searchcat?'.
615: 'phase=disp_adv&'.
616: 'catalogmode='.$ENV{'form.catalogmode'}.
617: '&launch='.$ENV{'form.launch'}.
618: '&mode='.$ENV{'form.mode'}.
619: '">'.&mt('Advanced Search').'</a>';
620: #
621: $scrout.='<form name="loncapa_search" method="post" '.
622: 'action="/adm/searchcat">'.
623: '<input type="hidden" name="phase" value="basic_search" />'.
624: $hidden_fields;
625: #
626: $scrout .= '<center>'.$/;
627: if ($ENV{'request.course.id'}) {
628: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
629: } else {
630: # No need to tell them they are searching
631: $scrout.= ('<br />'x2);
632: }
633: $scrout.='<table>'.
634: '<tr><td align="center" valign="top">'.
635: &Apache::lonhtmlcommon::textbox
636: ('basicexp',
637: &HTML::Entities::encode($ENV{'form.basicexp'},'<>&"'),50
638: ).
639: '<br />'.
640: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
641: '<td><font size="-1">'.
642: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
643: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
644: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
645: '</font></td>'.
646: '</tr>'.$/;
647: #
648: $scrout .= '<tr><td align="center" colspan="2">'.
649: '<font size="-1">'.
650: '<input type="submit" name="basicsubmit" '.
651: 'value="'.&mt('Search').'" />'.
652: (' 'x2).$closebutton.(' 'x2).
653: &viewoptions().
654: '</font>'.
655: '</td></tr>'.$/;
656: $scrout .= '</table>'.$/.'</center>'.'</form>';
657: }
658: if ($ENV{'request.course.id'}) {
659: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
660: 'header' => 'Course Search',
661: 'note' => 'Enter terms or phrases, then press "Search" below',
662: 'use' => 'use related words',
663: 'full' =>'fulltext search (time consuming)'
664: );
665: $scrout.=(<<ENDCOURSESEARCH);
666: <form name="loncapa_search" method="post" action="/adm/searchcat">
667: <center>
668: <hr />
669: <h1>$lt{'header'}</h1>
670: <input type="hidden" name="phase" value="course_search" />
671: $hidden_fields
672: <p>
673: $lt{'note'}.
674: </p>
675: <p>
676: <table>
677: <tr><td>
678: ENDCOURSESEARCH
679: $scrout.=' '.
680: &Apache::lonhtmlcommon::textbox('courseexp',
681: $ENV{'form.courseexp'},40);
682: my $crscheckbox =
683: &Apache::lonhtmlcommon::checkbox('crsfulltext',
684: $ENV{'form.crsfulltext'});
685: my $relcheckbox =
686: &Apache::lonhtmlcommon::checkbox('crsrelated',
687: $ENV{'form.crsrelated'});
688: $scrout.=(<<ENDENDCOURSE);
689: </td></tr>
690: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
691: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
692: </table><p>
693: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
694: </p>
695: </center>
696: </form>
697: ENDENDCOURSE
698: }
699: $scrout.=(<<ENDDOCUMENT);
700: </body>
701: </html>
702: ENDDOCUMENT
703: $r->print($scrout);
704: return;
705: }
706: ######################################################################
707: ######################################################################
708:
709: =pod
710:
711: =item &advanced_search_form()
712:
713: Prints the advanced search form.
714:
715: =cut
716:
717: ######################################################################
718: ######################################################################
719: sub print_advanced_search_form{
720: my ($r,$closebutton,$hidden_fields) = @_;
721: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
722: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
723: 'Search_Advanced',
724: undef,undef,
725: $ENV{'form.catalogmode'} ne 'groupsearch');
726: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
727: 'reset' => 'Reset',
728: 'help' => 'Help');
729: my $advanced_buttons=<<"END";
730: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
731: <input type="reset" name="reset" value='$lt{"reset"}' />
732: $closebutton
733: END
734: my $scrout=&search_html_header();
735: $scrout .= <<"ENDHEADER";
736: $bodytag
737: <form method="post" action="/adm/searchcat" name="advsearch">
738: <p>
739: $advanced_buttons
740: ENDHEADER
741: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
742: '<input type="hidden" name="phase" value="adv_search" />';
743: my %fields=&Apache::lonmeta::fieldnames();
744: #
745: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
746: $scrout .= "<table>\n";
747: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
748: (' 'x2).&searchhelp()."</font></td></tr>\n";
749: my %related_word_search =
750: ('title' => 1,
751: 'author' => 0,
752: 'owner' => 0,
753: 'authorspace' => 0,
754: 'modifyinguser'=> 0,
755: 'keywords' => 1,
756: 'notes' => 1,
757: 'abstract' => 1,
758: 'standards'=> 1,
759: 'mime' => 1,
760: );
761: #
762: foreach my $field ('title','author','owner','authorspace','modifyinguser',
763: 'keywords','notes','abstract','standards','mime') {
764: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
765: &Apache::lonmeta::prettyinput($field,
766: $ENV{'form.'.$field},
767: $field,
768: 'advsearch',
769: $related_word_search{$field},
770: '</td><td align="left">',
771: $ENV{'form.'.$field.'_related'},
772: 50);
773: if ($related_word_search{$field}) {
774: $scrout .= 'related words';
775: } else {
776: $scrout .= '</td><td> ';
777: }
778: $scrout .= '</td></tr>'.$/;
779: }
780: foreach my $field ('lowestgradelevel','highestgradelevel') {
781: $scrout.='<tr>'.
782: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
783: '<td colspan="2">'.
784: &Apache::lonmeta::prettyinput($field,
785: $ENV{'form.'.$field},
786: $field,
787: 'advsearch',
788: 0).
789: '</td></tr>'.$/;
790: }
791: $scrout.='<tr><td align="right">'.
792: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
793: &Apache::loncommon::filecategoryselect('category',
794: $ENV{'form.category'}).
795: '</td></tr>'.$/;
796: $scrout.='<tr><td align="right" valign="top">'.
797: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
798: &Apache::loncommon::domain_select('domains',
799: $ENV{'form.domains'},1).
800: '</td></tr>'.$/;
801: #
802: # Misc metadata
803: $scrout.='<tr><td align="right" valign="top">'.
804: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
805: &Apache::lonmeta::selectbox('copyright',
806: $ENV{'form.copyright'},
807: \&Apache::loncommon::copyrightdescription,
808: ( undef,
809: &Apache::loncommon::copyrightids)
810: ).'</td></tr>'.$/;
811: $scrout.='<tr><td align="right" valign="top">'.
812: &titlefield(&mt('Language')).'</td><td colspan="2">'.
813: &Apache::lonmeta::selectbox('language',
814: $ENV{'form.language'},
815: \&Apache::loncommon::languagedescription,
816: ('any',&Apache::loncommon::languageids)
817: ).'</td></tr>';
818: $scrout .= "</table>\n";
819: #
820: # Dynamic metadata
821: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
822: $scrout .= "<table>\n";
823: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
824: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
825: foreach my $statistic
826: ({ name=>'count',
827: description=>'Network-wide number of accesses (hits)',},
828: { name=>'stdno',
829: description=>
830: 'Total number of students who have worked on this problem',},
831: { name => 'avetries',
832: description=>'Average number of tries till solved',},
833: { name => 'difficulty',
834: description=>'Degree of difficulty',},
835: { name => 'disc',
836: description=>'Degree of discrimination'}) {
837: $scrout .= '<tr><td align="right">'.
838: &titlefield(&mt($statistic->{'description'})).
839: '</td><td align="center">'.
840: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
841: 'value="" size="6" />'.
842: '</td><td align="center">'.
843: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
844: 'value="" size="6" />'.
845: '</td></tr>'.$/;
846: }
847: $scrout .= "</table>\n";
848: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
849: $scrout .= "<table>\n";
850: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
851: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
852: foreach my $evaluation
853: ( { name => 'clear',
854: description => 'Material presented in clear way'},
855: { name =>'depth',
856: description => 'Material covered with sufficient depth'},
857: { name => 'helpful',
858: description => 'Material is helpful'},
859: { name => 'correct',
860: description => 'Material appears to be correct'},
861: { name => 'technical',
862: description => 'Resource is technically correct'}){
863: $scrout .= '<tr><td align="right">'.
864: &titlefield(&mt($evaluation->{'description'})).
865: '</td><td align="center">'.
866: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
867: 'value="" size="6" />'.
868: '</td><td align="center">'.
869: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
870: 'value="" size="6" />'.
871: '</td></tr>'.$/;
872: }
873: $scrout .= "</table>\n";
874: #
875: # Creation/Modification date limits
876: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
877: $scrout .= "\n<table>\n";
878: my $cafter =
879: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
880: 'creationdate1', # fieldname
881: 0, # current value
882: '', # special
883: 1, # includeempty
884: '', # state
885: 1, # no_hh_mm_ss
886: );
887: my $cbefore =
888: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
889: 'creationdate2', # fieldname
890: 0, # current value
891: '', # special
892: 1, # includeempty
893: '', # state
894: 1, # no_hh_mm_ss
895: );
896: $scrout .= &mt('<tr><td align="right">Created between</td>'.
897: '<td>[_1]</td></tr>'.
898: '<tr><td align="right">and </td>'.
899: '<td>[_2]</td></tr>',$cafter,$cbefore);
900: my $lafter =
901: &Apache::lonhtmlcommon::date_setter('advsearch',
902: 'revisiondate1',
903: 0, # current value
904: '', # special
905: 1, # includeempty
906: '', # state
907: 1, # no_hh_mm_ss
908: );
909: my $lbefore =
910: &Apache::lonhtmlcommon::date_setter('advsearch',
911: 'revisiondate2',
912: 0, # current value
913: '', # special
914: 1, # includeempty
915: '', # state
916: 1, # no_hh_mm_ss
917: );
918: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
919: '<td>[_1]</td></tr>'.
920: '<tr><td align="right">and</td>'.
921: '<td>[_2]</td></tr>',$lafter,$lbefore);
922: $scrout.="</table>\n";
923: $scrout.=<<ENDDOCUMENT;
924: $advanced_buttons
925: </form>
926: </body>
927: </html>
928: ENDDOCUMENT
929: $r->print($scrout);
930: return;
931: }
932:
933: ######################################################################
934: ######################################################################
935:
936: =pod
937:
938: =item &titlefield()
939:
940: Inputs: title text
941:
942: Outputs: titletext with font wrapper
943:
944: =cut
945:
946: ######################################################################
947: ######################################################################
948: sub titlefield {
949: my $title=shift;
950: return $title;
951: }
952:
953: ######################################################################
954: ######################################################################
955:
956: =pod
957:
958: =item viewoptiontext()
959:
960: Inputs: codename for view option
961:
962: Outputs: displayed text
963:
964: =cut
965:
966: ######################################################################
967: ######################################################################
968: sub viewoptiontext {
969: my $code=shift;
970: my %desc=&Apache::lonlocal::texthash
971: ('detailed' => "Detailed Citation View",
972: 'xml' => 'XML/SGML',
973: 'compact' => 'Compact View',
974: 'fielded' => 'Fielded Format',
975: 'summary' => 'Summary View');
976: return $desc{$code};
977: }
978:
979: ######################################################################
980: ######################################################################
981:
982: =pod
983:
984: =item viewoptions()
985:
986: Inputs: none
987:
988: Outputs: text for box with view options
989:
990: =cut
991:
992: ######################################################################
993: ######################################################################
994: sub viewoptions {
995: my $scrout;
996: if (! defined($ENV{'form.viewselect'})) {
997: $ENV{'form.viewselect'}='detailed';
998: }
999: $scrout.=&Apache::lonmeta::selectbox('viewselect',
1000: $ENV{'form.viewselect'},
1001: \&viewoptiontext,
1002: sort(keys(%Views)));
1003: $scrout.= ' ';
1004: my $countselect = &Apache::lonmeta::selectbox('show',
1005: $ENV{'form.show'},
1006: undef,
1007: (10,20,50,100,1000,10000));
1008: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
1009: '</nobr>'.$/;
1010: return $scrout;
1011: }
1012:
1013: ######################################################################
1014: ######################################################################
1015:
1016: =pod
1017:
1018: =item searchhelp()
1019:
1020: Inputs: none
1021:
1022: Outputs: return little blurb on how to enter searches
1023:
1024: =cut
1025:
1026: ######################################################################
1027: ######################################################################
1028: sub searchhelp {
1029: return &mt('Enter words and quoted phrases');
1030: }
1031:
1032: ######################################################################
1033: ######################################################################
1034:
1035: =pod
1036:
1037: =item &get_persistent_form_data()
1038:
1039: Inputs: filename of database
1040:
1041: Outputs: returns undef on database errors.
1042:
1043: This function is the reverse of &make_persistent() for form data.
1044: Retrieve persistent data from %persistent_db. Retrieved items will have their
1045: values unescaped. If a form value already exists in $ENV, it will not be
1046: overwritten. Form values that are array references may have values appended
1047: to them.
1048:
1049: =cut
1050:
1051: ######################################################################
1052: ######################################################################
1053: sub get_persistent_form_data {
1054: my $filename = shift;
1055: return 0 if (! -e $filename);
1056: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1057: &GDBM_READER(),0640));
1058: #
1059: # These make sure we do not get array references printed out as 'values'.
1060: my %arrays_allowed = ('form.domains'=>1);
1061: #
1062: # Loop through the keys, looking for 'form.'
1063: foreach my $name (keys(%persistent_db)) {
1064: next if ($name !~ /^form./);
1065: # Kludgification begins!
1066: if ($name eq 'form.domains' &&
1067: $ENV{'form.searchmode'} eq 'basic' &&
1068: $ENV{'form.phase'} ne 'disp_basic') {
1069: next;
1070: }
1071: # End kludge (hopefully)
1072: next if (exists($ENV{$name}));
1073: my @values = map {
1074: &Apache::lonnet::unescape($_);
1075: } split(',',$persistent_db{$name});
1076: next if (@values <1);
1077: if ($arrays_allowed{$name}) {
1078: $ENV{$name} = [@values];
1079: } else {
1080: $ENV{$name} = $values[0] if ($values[0]);
1081: }
1082: }
1083: untie (%persistent_db);
1084: return 1;
1085: }
1086:
1087: ######################################################################
1088: ######################################################################
1089:
1090: =pod
1091:
1092: =item &get_persistent_data()
1093:
1094: Inputs: filename of database, ref to array of values to recover.
1095:
1096: Outputs: array of values. Returns undef on error.
1097:
1098: This function is the reverse of &make_persistent();
1099: Retrieve persistent data from %persistent_db. Retrieved items will have their
1100: values unescaped. If the item contains commas (before unescaping), the
1101: returned value will be an array pointer.
1102:
1103: =cut
1104:
1105: ######################################################################
1106: ######################################################################
1107: sub get_persistent_data {
1108: my $filename = shift;
1109: my @Vars = @{shift()};
1110: my @Values; # Return array
1111: return undef if (! -e $filename);
1112: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1113: &GDBM_READER(),0640));
1114: foreach my $name (@Vars) {
1115: if (! exists($persistent_db{$name})) {
1116: push @Values, undef;
1117: next;
1118: }
1119: my @values = map {
1120: &Apache::lonnet::unescape($_);
1121: } split(',',$persistent_db{$name});
1122: if (@values <= 1) {
1123: push @Values,$values[0];
1124: } else {
1125: push @Values,\@values;
1126: }
1127: }
1128: untie (%persistent_db);
1129: return @Values;
1130: }
1131:
1132: ######################################################################
1133: ######################################################################
1134:
1135: =pod
1136:
1137: =item &make_persistent()
1138:
1139: Inputs: Hash of values to save, filename of persistent database.
1140:
1141: Store variables away to the %persistent_db.
1142: Values will be escaped. Values that are array pointers will have their
1143: elements escaped and concatenated in a comma separated string.
1144:
1145: =cut
1146:
1147: ######################################################################
1148: ######################################################################
1149: sub make_persistent {
1150: my %save = %{shift()};
1151: my $filename = shift;
1152: return undef if (! tie(%persistent_db,'GDBM_File',
1153: $filename,&GDBM_WRCREAT(),0640));
1154: foreach my $name (keys(%save)) {
1155: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1156: # We handle array references, but not recursively.
1157: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1158: $persistent_db{$name} = $store;
1159: }
1160: untie(%persistent_db);
1161: return 1;
1162: }
1163:
1164: ######################################################################
1165: ######################################################################
1166:
1167: =pod
1168:
1169: =item &make_form_data_persistent()
1170:
1171: Inputs: filename of persistent database.
1172:
1173: Store most form variables away to the %persistent_db.
1174: Values will be escaped. Values that are array pointers will have their
1175: elements escaped and concatenated in a comma separated string.
1176:
1177: =cut
1178:
1179: ######################################################################
1180: ######################################################################
1181: sub make_form_data_persistent {
1182: my $r = shift;
1183: my $filename = shift;
1184: my %save;
1185: foreach (keys(%ENV)) {
1186: next if (!/^form/ || /submit/);
1187: $save{$_} = $ENV{$_};
1188: }
1189: return &make_persistent(\%save,$filename);
1190: }
1191:
1192: ######################################################################
1193: ######################################################################
1194:
1195: =pod
1196:
1197: =item &parse_advanced_search()
1198:
1199: Parse advanced search form and return the following:
1200:
1201: =over 4
1202:
1203: =item $query Scalar containing an SQL query.
1204:
1205: =item $customquery Scalar containing a custom query.
1206:
1207: =item $customshow Scalar containing commands to show custom metadata.
1208:
1209: =item $libraries_to_query Reference to array of domains to search.
1210:
1211: =back
1212:
1213: =cut
1214:
1215: ######################################################################
1216: ######################################################################
1217: sub parse_advanced_search {
1218: my ($r,$closebutton,$hidden_fields)=@_;
1219: my @BasicFields = ('title','author','subject','keywords','url','version',
1220: 'notes','abstract','extension','owner','authorspace',
1221: # 'custommetadata','customshow',
1222: 'modifyinguser','standards','mime');
1223: my @StatsFields = &statfields();
1224: my @EvalFields = &evalfields();
1225: my $fillflag=0;
1226: my $pretty_search_string = "";
1227: # Clean up fields for safety
1228: for my $field (@BasicFields,
1229: 'creationdatestart_month','creationdatestart_day',
1230: 'creationdatestart_year','creationdateend_month',
1231: 'creationdateend_day','creationdateend_year',
1232: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1233: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1234: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1235: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1236: }
1237: foreach ('mode','form','element') {
1238: # is this required? Hmmm.
1239: next if (! exists($ENV{'form.'.$_}));
1240: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1241: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1242: }
1243: # Preprocess the category form element.
1244: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1245: ref($ENV{'form.category'}));
1246: #
1247: # Check to see if enough information was filled in
1248: foreach my $field (@BasicFields) {
1249: if (&filled($ENV{'form.'.$field})) {
1250: $fillflag++;
1251: }
1252: }
1253: foreach my $field (@StatsFields,@EvalFields) {
1254: if (&filled($ENV{'form.'.$field.'_max'})) {
1255: $fillflag++;
1256: }
1257: if (&filled($ENV{'form.'.$field.'_min'})) {
1258: $fillflag++;
1259: }
1260: }
1261:
1262: for my $field ('lowestgradelevel','highestgradelevel') {
1263: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1264: $ENV{'form.'.$field} > 0) {
1265: $fillflag++;
1266: }
1267: }
1268: if (! $fillflag) {
1269: &output_blank_field_error($r,$closebutton,
1270: 'phase=disp_adv',$hidden_fields);
1271: return ;
1272: }
1273: # Turn the form input into a SQL-based query
1274: my $query='';
1275: my @queries;
1276: my $font = '<font color="#800000" face="helvetica">';
1277: # Evaluate logical expression AND/OR/NOT phrase fields.
1278: foreach my $field (@BasicFields) {
1279: next if (!defined($ENV{'form.'.$field}) || $ENV{'form.'.$field} eq '');
1280: my ($error,$SQLQuery) =
1281: &process_phrase_input($ENV{'form.'.$field},
1282: $ENV{'form.'.$field.'_related'},$field);
1283: if (defined($error)) {
1284: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1285: $hidden_fields,$field);
1286: return;
1287: } else {
1288: $pretty_search_string .=
1289: $font.$field.'</font>: '.$ENV{'form.'.$field};
1290: if ($ENV{'form.'.$field.'_related'}) {
1291: my @Words =
1292: &Apache::loncommon::get_related_words
1293: ($ENV{'form.'.$field});
1294: if (@Words) {
1295: $pretty_search_string.= ' with related words: '.
1296: join(', ',@Words[0..4]);
1297: } else {
1298: $pretty_search_string.= ' with related words.';
1299: }
1300: }
1301: $pretty_search_string .= '<br />';
1302: push (@queries,$SQLQuery);
1303: }
1304: }
1305: #
1306: # Make the 'mime' from 'form.category' and 'form.extension'
1307: #
1308: my $searchphrase;
1309: if (exists($ENV{'form.category'}) &&
1310: $ENV{'form.category'} !~ /^\s*$/ &&
1311: $ENV{'form.category'} ne 'any') {
1312: my @extensions = &Apache::loncommon::filecategorytypes
1313: ($ENV{'form.category'});
1314: if (scalar(@extensions) > 0) {
1315: $searchphrase = join(' OR ',@extensions);
1316: }
1317: }
1318: if (defined($searchphrase)) {
1319: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1320: push @queries,$SQLsearch;
1321: $pretty_search_string .=$font.'mime</font> contains <b>'.
1322: $searchphrase.'</b><br />';
1323: }
1324: #
1325: # Evaluate option lists
1326: if ($ENV{'form.lowestgradelevel'} &&
1327: $ENV{'form.lowestgradelevel'} ne '0' &&
1328: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1329: push(@queries,
1330: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1331: $pretty_search_string.="lowestgradelevel>=".
1332: $ENV{'form.lowestgradelevel'}."<br />\n";
1333: }
1334: if ($ENV{'form.highestgradelevel'} &&
1335: $ENV{'form.highestgradelevel'} ne '0' &&
1336: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1337: push(@queries,
1338: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1339: $pretty_search_string.="highestgradelevel<=".
1340: $ENV{'form.highestgradelevel'}."<br />\n";
1341: }
1342: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1343: push @queries,"(language like \"$ENV{'form.language'}\")";
1344: $pretty_search_string.=$font."language</font>= ".
1345: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1346: "<br />\n";
1347: }
1348: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1349: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1350: $pretty_search_string.=$font."copyright</font> = ".
1351: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1352: "<br />\n";
1353: }
1354: #
1355: # Statistics
1356: foreach my $field (@StatsFields,@EvalFields) {
1357: my ($min,$max);
1358: if (exists($ENV{'form.'.$field.'_min'}) &&
1359: $ENV{'form.'.$field.'_min'} ne '') {
1360: $min = $ENV{'form.'.$field.'_min'};
1361: }
1362: if (exists($ENV{'form.'.$field.'_max'}) &&
1363: $ENV{'form.'.$field.'_max'} ne '') {
1364: $max = $ENV{'form.'.$field.'_max'};
1365: }
1366: next if (! defined($max) && ! defined($min));
1367: if (defined($min) && defined($max)) {
1368: ($min,$max) = sort {$a <=>$b} ($min,$max);
1369: }
1370: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1371: push(@queries,'('.$field.'>'.$min.')');
1372: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1373: }
1374: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1375: push(@queries,'('.$field.'<'.$max.')');
1376: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1377: }
1378: }
1379: #
1380: # Evaluate date windows
1381: my $cafter =
1382: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1383: my $cbefore =
1384: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1385: if ($cafter > $cbefore) {
1386: my $tmp = $cafter;
1387: $cafter = $cbefore;
1388: $cbefore = $tmp;
1389: }
1390: my $mafter =
1391: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1392: my $mbefore =
1393: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1394: if ($mafter > $mbefore) {
1395: my $tmp = $mafter;
1396: $mafter = $mbefore;
1397: $mbefore = $tmp;
1398: }
1399: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1400: $mafter,$mbefore);
1401: if (defined($error)) {
1402: &output_date_error($r,$error,$closebutton,$hidden_fields);
1403: } elsif (defined($datequery)) {
1404: # Here is where you would set up pretty_search_string to output
1405: # date query information.
1406: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1407: push @queries,$datequery;
1408: }
1409: #
1410: # Process form information for custom metadata querying
1411: my $customquery=undef;
1412: ##
1413: ## The custom metadata search was removed q long time ago mostly
1414: ## because I was unable to figureout exactly how it worked and could
1415: ## not imagine people actually using it. MH
1416: ##
1417: # if ($ENV{'form.custommetadata'}) {
1418: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1419: # $ENV{'form.custommetadata'}."</b><br />\n";
1420: # $customquery=&build_custommetadata_query('custommetadata',
1421: # $ENV{'form.custommetadata'});
1422: # }
1423: my $customshow=undef;
1424: # if ($ENV{'form.customshow'}) {
1425: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1426: # $ENV{'form.customshow'}."</b><br />\n";
1427: # $customshow=$ENV{'form.customshow'};
1428: # $customshow=~s/[^\w\s]//g;
1429: # my @fields=split(/\s+/,$customshow);
1430: # $customshow=join(" ",@fields);
1431: # }
1432: ##
1433: ## Deal with restrictions to given domains
1434: ##
1435: my ($libraries_to_query,$pretty_domains_string) =
1436: &parse_domain_restrictions();
1437: $pretty_search_string .= $pretty_domains_string."<br />\n";
1438: #
1439: if (@queries) {
1440: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1441: } elsif ($customquery) {
1442: $query = '';
1443: }
1444: # &Apache::lonnet::logthis('query = '.$/.$query);
1445: return ($query,$customquery,$customshow,$libraries_to_query,
1446: $pretty_search_string);
1447: }
1448:
1449: sub parse_domain_restrictions {
1450: my $libraries_to_query = undef;
1451: # $ENV{'form.domains'} can be either a scalar or an array reference.
1452: # We need an array.
1453: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1454: return (undef,'');
1455: }
1456: my @allowed_domains;
1457: if (ref($ENV{'form.domains'})) {
1458: @allowed_domains = @{$ENV{'form.domains'}};
1459: } else {
1460: @allowed_domains = ($ENV{'form.domains'});
1461: }
1462: #
1463: my %domain_hash = ();
1464: my $pretty_domains_string;
1465: foreach (@allowed_domains) {
1466: $domain_hash{$_}++;
1467: }
1468: if ($domain_hash{'any'}) {
1469: $pretty_domains_string = "In all LON-CAPA domains.";
1470: } else {
1471: if (@allowed_domains > 1) {
1472: $pretty_domains_string = "In LON-CAPA domains:";
1473: } else {
1474: $pretty_domains_string = "In LON-CAPA domain ";
1475: }
1476: foreach (sort @allowed_domains) {
1477: $pretty_domains_string .= "<b>".$_."</b> ";
1478: }
1479: foreach (keys(%Apache::lonnet::libserv)) {
1480: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1481: push @$libraries_to_query,$_;
1482: }
1483: }
1484: }
1485: return ($libraries_to_query,$pretty_domains_string);
1486: }
1487:
1488: ######################################################################
1489: ######################################################################
1490:
1491: =pod
1492:
1493: =item &parse_basic_search()
1494:
1495: Parse the basic search form and return a scalar containing an sql query.
1496:
1497: =cut
1498:
1499: ######################################################################
1500: ######################################################################
1501: sub parse_basic_search {
1502: my ($r,$closebutton)=@_;
1503: #
1504: # Clean up fields for safety
1505: for my $field ('basicexp') {
1506: $ENV{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-]//g;
1507: }
1508: foreach ('mode','form','element') {
1509: # is this required? Hmmm.
1510: next unless (exists($ENV{"form.$_"}));
1511: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1512: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1513: }
1514: my ($libraries_to_query,$pretty_domains_string) =
1515: &parse_domain_restrictions();
1516: #
1517: # Check to see if enough of a query is filled in
1518: my $search_string = $ENV{'form.basicexp'};
1519: if (! &filled($search_string)) {
1520: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1521: return OK;
1522: }
1523: my $pretty_search_string=$search_string;
1524: my @Queries;
1525: my $searchfield = 'concat_ws(" ",'.join(',',
1526: ('title','author','subject',
1527: 'notes','abstract','keywords')
1528: ).')';
1529: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1530: $ENV{'form.related'},
1531: $searchfield);
1532: if ($error) {
1533: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1534: '','basicexp');
1535: return;
1536: }
1537: push(@Queries,$SQLQuery);
1538: #foreach my $q (@Queries) {
1539: # &Apache::lonnet::logthis(' '.$q);
1540: #}
1541: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1542: #
1543: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1544: $pretty_search_string .= ' '.$pretty_domains_string;
1545: }
1546: $pretty_search_string .= "<br />\n";
1547: $pretty_search_string =~ s:^<br /> and ::;
1548: # &Apache::lonnet::logthis($final_query);
1549: return ($final_query,$pretty_search_string,
1550: $libraries_to_query);
1551: }
1552:
1553:
1554: ###############################################################
1555: ###############################################################
1556:
1557: my @Phrases;
1558:
1559: sub concat {
1560: my ($item) = @_;
1561: my $results = '';
1562: foreach (@$item) {
1563: if (ref($_) eq 'ARRAY') {
1564: $results .= join(' ',@$_);
1565: }
1566: }
1567: return $results;
1568: }
1569:
1570: sub process_phrase_input {
1571: my ($phrase,$related,$field)=@_;
1572: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1573: my $grammar = <<'ENDGRAMMAR';
1574: searchphrase:
1575: expression /^\Z/ {
1576: # &Apache::lonsearchcat::print_item(\@item,0);
1577: [@item];
1578: }
1579: expression:
1580: phrase(s) {
1581: [@item];
1582: }
1583: phrase:
1584: orword {
1585: [@item];
1586: }
1587: | andword {
1588: [@item];
1589: }
1590: | minusword {
1591: unshift(@::Phrases,$item[1]->[0]);
1592: unshift(@::Phrases,$item[1]->[1]);
1593: [@item];
1594: }
1595: | word {
1596: unshift(@::Phrases,$item[1]);
1597: [@item];
1598: }
1599: #
1600: orword:
1601: word 'OR' phrase {
1602: unshift(@::Phrases,'OR');
1603: unshift(@::Phrases,$item[1]);
1604: [@item];
1605: }
1606: | word 'or' phrase {
1607: unshift(@::Phrases,'OR');
1608: unshift(@::Phrases,$item[1]);
1609: [@item];
1610: }
1611: | minusword 'OR' phrase {
1612: unshift(@::Phrases,'OR');
1613: unshift(@::Phrases,$item[1]->[0]);
1614: unshift(@::Phrases,$item[1]->[1]);
1615: [@item];
1616: }
1617: | minusword 'or' phrase {
1618: unshift(@::Phrases,'OR');
1619: unshift(@::Phrases,$item[1]->[0]);
1620: unshift(@::Phrases,$item[1]->[1]);
1621: [@item];
1622: }
1623: andword:
1624: word phrase {
1625: unshift(@::Phrases,'AND');
1626: unshift(@::Phrases,$item[1]);
1627: [@item];
1628: }
1629: | minusword phrase {
1630: unshift(@::Phrases,'AND');
1631: unshift(@::Phrases,$item[1]->[0]);
1632: unshift(@::Phrases,$item[1]->[1]);
1633: [@item];
1634: }
1635: #
1636: minusword:
1637: '-' word {
1638: [$item[2],'NOT'];
1639: }
1640: word:
1641: "'" term(s) "'" {
1642: &Apache::lonsearchcat::concat(\@item);
1643: }
1644: | '"' term(s) '"' {
1645: &Apache::lonsearchcat::concat(\@item);
1646: }
1647: | term {
1648: $item[1];
1649: }
1650: term:
1651: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E]+/ {
1652: $item[1];
1653: }
1654: ENDGRAMMAR
1655: #
1656: # The end result of parsing the phrase with the grammar is an array
1657: # @::Phrases.
1658: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1659: # $phrase = "genetic engineering" -dna ->
1660: # "genetic engineering","AND","NOT","dna"
1661: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1662: undef(@::Phrases);
1663: my $p = new Parse::RecDescent($grammar);
1664: if (! defined($p->searchphrase($phrase))) {
1665: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1666: return 'Unable to process phrase '.$phrase;
1667: }
1668: #
1669: # Go through the phrases and make sense of them.
1670: # Apply modifiers NOT OR and AND to the phrases.
1671: my @NewPhrases;
1672: while(@::Phrases) {
1673: my $phrase = shift(@::Phrases);
1674: # &Apache::lonnet::logthis('phrase = '.$phrase);
1675: my $phrasedata;
1676: if ($phrase =~ /^(NOT|OR|AND)$/) {
1677: if ($phrase eq 'OR') {
1678: $phrasedata->{'or'}++;
1679: if (! @::Phrases) { $phrasedata = undef; last; }
1680: $phrase = shift(@::Phrases);
1681: } elsif ($phrase eq 'AND') {
1682: $phrasedata->{'and'}++;
1683: if (! @::Phrases) { $phrasedata = undef; last; }
1684: $phrase = shift(@::Phrases);
1685: }
1686: if ($phrase eq 'NOT') {
1687: $phrasedata->{'negate'}++;
1688: if (! @::Phrases) { $phrasedata = undef; last; }
1689: $phrase = shift(@::Phrases);
1690: }
1691: }
1692: $phrasedata->{'phrase'} = $phrase;
1693: if ($related) {
1694: my @NewWords;
1695: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1696: $phrasedata->{'related_words'} = \@NewWords;
1697: }
1698: push(@NewPhrases,$phrasedata);
1699: }
1700: #
1701: # Actually build the sql query from the phrases
1702: my $SQLQuery;
1703: foreach my $phrase (@NewPhrases) {
1704: my $query;
1705: if ($phrase->{'negate'}) {
1706: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1707: } else {
1708: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1709: }
1710: foreach my $related (@{$phrase->{'related_words'}}) {
1711: if ($phrase->{'negate'}) {
1712: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1713: } else {
1714: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1715: }
1716: }
1717: if ($SQLQuery) {
1718: if ($phrase->{'or'}) {
1719: $SQLQuery .= ' OR ('.$query.')';
1720: } else {
1721: $SQLQuery .= ' AND ('.$query.')';
1722: }
1723: } else {
1724: $SQLQuery = '('.$query.')';
1725: }
1726: }
1727: #
1728: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1729: #
1730: return undef,$SQLQuery;
1731: }
1732:
1733: ######################################################################
1734: ######################################################################
1735:
1736: =pod
1737:
1738: =item &related_version()
1739:
1740: Modifies an input string to include related words. Words in the string
1741: are replaced with parenthesized lists of 'OR'd words. For example
1742: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1743:
1744: Note: Using this twice on a string is probably silly.
1745:
1746: =cut
1747:
1748: ######################################################################
1749: ######################################################################
1750: sub related_version {
1751: my ($word) = @_;
1752: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1753: my @Words = &Apache::loncommon::get_related_words($word);
1754: # Only use 4 related words
1755: @Words = ($#Words>4? @Words[0..4] : @Words);
1756: my $result = join " OR ", ($word,@Words);
1757: return $result,sort(@Words);
1758: }
1759:
1760:
1761: ######################################################################
1762: ######################################################################
1763:
1764: =pod
1765:
1766: =item &build_custommetadata_query()
1767:
1768: Constructs a custom metadata query using a rather heinous regular
1769: expression.
1770:
1771: =cut
1772:
1773: ######################################################################
1774: ######################################################################
1775: sub build_custommetadata_query {
1776: my ($field_name,$logic_statement)=@_;
1777: my $q=new Text::Query('abc',
1778: -parse => 'Text::Query::ParseAdvanced',
1779: -build => 'Text::Query::BuildAdvancedString');
1780: $q->prepare($logic_statement);
1781: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1782: # quick fix to change literal into xml tag-matching
1783: # will eventually have to write a separate builder module
1784: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1785: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1786: /\\<$1\\>?# \<wordone\>
1787: \[\^\\<\]?# [^\<]
1788: \*$2\[\^\\<\]?# *wordtwo[^\<]
1789: \*\\<\\\/$1\\>?# *\<\/wordone\>
1790: /g;
1791: return $matchexp;
1792: }
1793:
1794:
1795: ######################################################################
1796: ######################################################################
1797:
1798: =pod
1799:
1800: =item &build_date_queries()
1801:
1802: Builds a SQL logic query to check time/date entries.
1803: Also reports errors (check for /^Incorrect/).
1804:
1805: =cut
1806:
1807: ######################################################################
1808: ######################################################################
1809: sub build_date_queries {
1810: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1811: my ($result,$error,$pretty_string);
1812: #
1813: # Verify the input
1814: if (! defined($cafter) && ! defined($cbefore) &&
1815: ! defined($mafter) && ! defined($mbefore)) {
1816: # This is an okay situation, so return undef for the error
1817: return (undef,undef,undef);
1818: }
1819: if ((defined($cafter) && ! defined($cbefore)) ||
1820: (defined($cbefore) && ! defined($cafter))) {
1821: # This is bad, so let them know
1822: $error = &mt('Incorrect entry for the creation date. '.
1823: 'You must specify both the beginning and ending dates.');
1824: }
1825: if (! defined($error) &&
1826: ((defined($mafter) && ! defined($mbefore)) ||
1827: (defined($mbefore) && ! defined($mafter)))) {
1828: # This is also bad, so let them know
1829: $error = &mt('Incorrect entry for the last revision date. '.
1830: 'You must specify both the beginning and ending dates.');
1831: }
1832: if (! defined($error)) {
1833: #
1834: # Build the queries
1835: my @queries;
1836: if (defined($cbefore) && defined($cafter)) {
1837: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1838: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1839: # Correct for year being relative to 1900
1840: $cayear+=1900; $cbyear+=1900;
1841: my $cquery=
1842: '(creationdate BETWEEN '.
1843: "'".$cayear.'-'.$camon.'-'.$caday."'".
1844: ' AND '.
1845: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1846: $pretty_string .= '<br />' if (defined($pretty_string));
1847: $pretty_string .=
1848: &mt('created between [_1] and [_2]',
1849: &Apache::lonlocal::locallocaltime($cafter),
1850: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1851: push(@queries,$cquery);
1852: $pretty_string =~ s/ 00:00:00//g;
1853: }
1854: if (defined($mbefore) && defined($mafter)) {
1855: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1856: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1857: # Correct for year being relative to 1900
1858: $mayear+=1900; $mbyear+=1900;
1859: my $mquery=
1860: '(lastrevisiondate BETWEEN '.
1861: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1862: ' AND '.
1863: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1864: push(@queries,$mquery);
1865: $pretty_string .= '<br />' if (defined($pretty_string));
1866: $pretty_string .=
1867: &mt('last revised between [_1] and [_2]',
1868: &Apache::lonlocal::locallocaltime($mafter),
1869: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1870: $pretty_string =~ s/ 00:00:00//g;
1871: }
1872: if (@queries) {
1873: $result .= join(" AND ",@queries);
1874: }
1875: }
1876: return ($result,$error,$pretty_string);
1877: }
1878:
1879: ######################################################################
1880: ######################################################################
1881:
1882: =pod
1883:
1884: =item ©right_check()
1885:
1886: Inputs: $Metadata, a hash pointer of metadata for a resource.
1887:
1888: Returns: 1 if the resource is available to the user making the query,
1889: 0 otherwise.
1890:
1891: =cut
1892:
1893: ######################################################################
1894: ######################################################################
1895: sub copyright_check {
1896: my $Metadata = shift;
1897: # Check copyright tags and skip results the user cannot use
1898: my (undef,undef,$resdom,$resname) = split('/',
1899: $Metadata->{'url'});
1900: # Check for priv
1901: if (($Metadata->{'copyright'} eq 'priv') &&
1902: (($ENV{'user.name'} ne $resname) &&
1903: ($ENV{'user.domain'} ne $resdom))) {
1904: return 0;
1905: }
1906: # Check for domain
1907: if (($Metadata->{'copyright'} eq 'domain') &&
1908: ($ENV{'user.domain'} ne $resdom)) {
1909: return 0;
1910: }
1911: return 1;
1912: }
1913:
1914: ######################################################################
1915: ######################################################################
1916:
1917: =pod
1918:
1919: =item &ensure_db_and_table()
1920:
1921: Ensure we can get lonmysql to connect to the database and the table we
1922: need exists.
1923:
1924: Inputs: $r, table id
1925:
1926: Returns: undef on error, 1 if the table exists.
1927:
1928: =cut
1929:
1930: ######################################################################
1931: ######################################################################
1932: sub ensure_db_and_table {
1933: my ($r,$table) = @_;
1934: ##
1935: ## Sanity check the table id.
1936: ##
1937: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1938: $r->print("Unable to retrieve search results. ".
1939: "Unable to determine the table results were stored in. ".
1940: "</body></html>");
1941: return undef;
1942: }
1943: ##
1944: ## Make sure we can connect and the table exists.
1945: ##
1946: my $connection_result = &Apache::lonmysql::connect_to_db();
1947: if (!defined($connection_result)) {
1948: $r->print("Unable to connect to the MySQL database where your results".
1949: " are stored. </body></html>");
1950: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1951: " connect to database.");
1952: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1953: return undef;
1954: }
1955: my $table_check = &Apache::lonmysql::check_table($table);
1956: if (! defined($table_check)) {
1957: $r->print("A MySQL error has occurred.</form></body></html>");
1958: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1959: " of table ".$table);
1960: return undef;
1961: } elsif (! $table_check) {
1962: $r->print("The table of results could not be found.");
1963: &Apache::lonnet::logthis("The user requested a table, ".$table.
1964: ", that could not be found.");
1965: return undef;
1966: }
1967: return 1;
1968: }
1969:
1970: ######################################################################
1971: ######################################################################
1972:
1973: =pod
1974:
1975: =item &print_sort_form()
1976:
1977: The sort feature is not implemented at this time. This form just prints
1978: a link to change the search query.
1979:
1980: =cut
1981:
1982: ######################################################################
1983: ######################################################################
1984: sub print_sort_form {
1985: my ($r,$pretty_query_string) = @_;
1986: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1).
1987: &Apache::lonhtmlcommon::breadcrumbs
1988: (undef,'Searching','Searching',undef,undef,
1989: $ENV{'form.catalogmode'} ne 'groupsearch');
1990:
1991: ##
1992: my %SortableFields=&Apache::lonlocal::texthash(
1993: id => 'Default',
1994: title => 'Title',
1995: author => 'Author',
1996: subject => 'Subject',
1997: url => 'URL',
1998: version => 'Version Number',
1999: mime => 'Mime type',
2000: lang => 'Language',
2001: owner => 'Owner/Publisher',
2002: copyright => 'Copyright',
2003: hostname => 'Host',
2004: creationdate => 'Creation Date',
2005: lastrevisiondate => 'Revision Date'
2006: );
2007: ##
2008: my $table = $ENV{'form.table'};
2009: return if (! &ensure_db_and_table($r,$table));
2010: ##
2011: ## Get the number of results
2012: ##
2013: my $total_results = &Apache::lonmysql::number_of_rows($table);
2014: if (! defined($total_results)) {
2015: $r->print("A MySQL error has occurred.</form></body></html>");
2016: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2017: " of rows in table ".$table);
2018: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2019: return;
2020: }
2021: my $result;
2022: $result.=<<END;
2023: <html>
2024: <head>
2025: <script>
2026: function change_sort() {
2027: var newloc = "/adm/searchcat?phase=results";
2028: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
2029: newloc += "&sortby=";
2030: newloc += document.forms.statusform.elements.sortby.value;
2031: parent.resultsframe.location= newloc;
2032: }
2033: </script>
2034: <title>Results</title>
2035: </head>
2036: $bodytag
2037: <form name="statusform" action="" method="post">
2038: <input type="hidden" name="Queue" value="" />
2039: END
2040:
2041: #<h2>Sort Results</h2>
2042: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2043: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
2044: # foreach (keys(%SortableFields)) {
2045: # $result.="<option name=\"$_\"";
2046: # if ($_ eq $ENV{'form.sortby'}) {
2047: # $result.=" selected ";
2048: # }
2049: # $result.=" >$SortableFields{$_}</option>\n";
2050: # }
2051: # $result.="</select>\n";
2052: my $revise = &revise_button();
2053: $result.=<<END;
2054: <p>
2055: There are $total_results matches to your query. $revise
2056: </p><p>
2057: Search:$pretty_query_string
2058: </p>
2059: </form>
2060: </body>
2061: </html>
2062: END
2063: $r->print($result);
2064: return;
2065: }
2066:
2067: #####################################################################
2068: #####################################################################
2069:
2070: =pod
2071:
2072: =item MySQL Table Description
2073:
2074: MySQL table creation requires a precise description of the data to be
2075: stored. The use of the correct types to hold data is vital to efficient
2076: storage and quick retrieval of records. The columns must be described in
2077: the following format:
2078:
2079: =cut
2080:
2081: #####################################################################
2082: #####################################################################
2083: #
2084: # These should probably be scoped but I don't have time right now...
2085: #
2086: my @Datatypes;
2087: my @Fullindicies;
2088:
2089: ######################################################################
2090: ######################################################################
2091:
2092: =pod
2093:
2094: =item &create_results_table()
2095:
2096: Creates the table of search results by calling lonmysql. Stores the
2097: table id in $ENV{'form.table'}
2098:
2099: Inputs: none.
2100:
2101: Returns: the identifier of the table on success, undef on error.
2102:
2103: =cut
2104:
2105: ######################################################################
2106: ######################################################################
2107: sub set_up_table_structure {
2108: my ($datatypes,$fullindicies) =
2109: &LONCAPA::lonmetadata::describe_metadata_storage();
2110: # Copy the table description before modifying it...
2111: @Datatypes = @{$datatypes};
2112: unshift(@Datatypes,{name => 'id',
2113: type => 'MEDIUMINT',
2114: restrictions => 'UNSIGNED NOT NULL',
2115: primary_key => 'yes',
2116: auto_inc => 'yes' });
2117: @Fullindicies = @{$fullindicies};
2118: return;
2119: }
2120:
2121: sub create_results_table {
2122: &set_up_table_structure();
2123: my $table = &Apache::lonmysql::create_table
2124: ( { columns => \@Datatypes,
2125: FULLTEXT => [{'columns' => \@Fullindicies},],
2126: } );
2127: if (defined($table)) {
2128: $ENV{'form.table'} = $table;
2129: return $table;
2130: }
2131: return undef; # Error...
2132: }
2133:
2134: ######################################################################
2135: ######################################################################
2136:
2137: =pod
2138:
2139: =item Search Status update functions
2140:
2141: Each of the following functions changes the values of one of the
2142: input fields used to display the search status to the user. The names
2143: should be explanatory.
2144:
2145: Inputs: Apache request handler ($r), text to display.
2146:
2147: Returns: Nothing.
2148:
2149: =over 4
2150:
2151: =item &update_count_status()
2152:
2153: =item &update_status()
2154:
2155: =item &update_seconds()
2156:
2157: =back
2158:
2159: =cut
2160:
2161: ######################################################################
2162: ######################################################################
2163: sub update_count_status {
2164: my ($r,$text) = @_;
2165: $text =~ s/\'/\\\'/g;
2166: $r->print
2167: ("<script>document.statusform.count.value = ' $text'</script>\n");
2168: $r->rflush();
2169: }
2170:
2171: sub update_status {
2172: my ($r,$text) = @_;
2173: $text =~ s/\'/\\\'/g;
2174: $r->print
2175: ("<script>document.statusform.status.value = ' $text'</script>\n");
2176: $r->rflush();
2177: }
2178:
2179: {
2180: my $max_time = 40; # seconds for the search to complete
2181: my $start_time = 0;
2182: my $last_time = 0;
2183:
2184: sub reset_timing {
2185: $start_time = 0;
2186: $last_time = 0;
2187: }
2188:
2189: sub time_left {
2190: if ($start_time == 0) {
2191: $start_time = time;
2192: }
2193: my $time_left = $max_time - (time - $start_time);
2194: $time_left = 0 if ($time_left < 0);
2195: return $time_left;
2196: }
2197:
2198: sub update_seconds {
2199: my ($r) = @_;
2200: my $time = &time_left();
2201: if (($last_time-$time) > 0) {
2202: $r->print("<script>".
2203: "document.statusform.seconds.value = '$time'".
2204: "</script>\n");
2205: $r->rflush();
2206: }
2207: $last_time = $time;
2208: }
2209:
2210: }
2211:
2212: ######################################################################
2213: ######################################################################
2214:
2215: =pod
2216:
2217: =item &revise_button()
2218:
2219: Inputs: None
2220:
2221: Returns: html string for a 'revise search' button.
2222:
2223: =cut
2224:
2225: ######################################################################
2226: ######################################################################
2227: sub revise_button {
2228: my $revise_phase = 'disp_basic';
2229: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2230: my $newloc = '/adm/searchcat'.
2231: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2232: '&cleargroupsort=1'.
2233: '&phase='.$revise_phase;
2234: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2235: qq{ onClick="parent.location='$newloc';" /> };
2236: return $result;
2237: }
2238:
2239: ######################################################################
2240: ######################################################################
2241:
2242: =pod
2243:
2244: =item &run_search()
2245:
2246: Executes a search query by sending it the the other servers and putting the
2247: results into MySQL.
2248:
2249: =cut
2250:
2251: ######################################################################
2252: ######################################################################
2253: sub run_search {
2254: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2255: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2256: $bodytag.=&Apache::lonhtmlcommon::breadcrumbs
2257: (undef,'Searching','Searching',undef,undef,
2258: $ENV{'form.catalogmode'} ne 'groupsearch');
2259: my $connection = $r->connection;
2260: #
2261: # Print run_search header
2262: #
2263: $r->print(<<END);
2264: <html>
2265: <head><title>Search Status</title></head>
2266: $bodytag
2267: <form name="statusform" action="" method="post">
2268: <input type="hidden" name="Queue" value="" />
2269: END
2270: # Remove leading and trailing <br />
2271: $pretty_string =~ s:^\s*<br />::i;
2272: $pretty_string =~ s:(<br />)*\s*$::im;
2273: my @Lines = split("<br />",$pretty_string);
2274: # I keep getting blank items at the end of the list, hence the following:
2275: while ($Lines[-1] =~ /^\s*$/ && @Lines) {
2276: pop(@Lines);
2277: }
2278: if (@Lines > 2) {
2279: $pretty_string = join '<br />',(@Lines[0..2],'....<br />');
2280: }
2281: $r->print(&mt("Search: [_1]",$pretty_string));
2282: $r->rflush();
2283: #
2284: # Determine the servers we need to contact.
2285: my @Servers_to_contact;
2286: if (defined($serverlist)) {
2287: if (ref($serverlist) eq 'ARRAY') {
2288: @Servers_to_contact = @$serverlist;
2289: } else {
2290: @Servers_to_contact = ($serverlist);
2291: }
2292: } else {
2293: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2294: }
2295: my %Server_status;
2296: #
2297: # Check on the mysql table we will use to store results.
2298: my $table =$ENV{'form.table'};
2299: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2300: $r->print("Unable to determine table id to store search results in.".
2301: "The search has been aborted.</body></html>");
2302: return;
2303: }
2304: my $table_status = &Apache::lonmysql::check_table($table);
2305: if (! defined($table_status)) {
2306: $r->print("Unable to determine status of table.</body></html>");
2307: &Apache::lonnet::logthis("Bogus table id of $table for ".
2308: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2309: &Apache::lonnet::logthis("lonmysql error = ".
2310: &Apache::lonmysql::get_error());
2311: return;
2312: }
2313: if (! $table_status) {
2314: &Apache::lonnet::logthis("lonmysql error = ".
2315: &Apache::lonmysql::get_error());
2316: &Apache::lonnet::logthis("lonmysql debug = ".
2317: &Apache::lonmysql::get_debug());
2318: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2319: $r->print("The table id,$table, we tried to use is invalid.".
2320: "The search has been aborted.</body></html>");
2321: return;
2322: }
2323: ##
2324: ## Prepare for the big loop.
2325: my $hitcountsum;
2326: my $server;
2327: my $status;
2328: my $revise = &revise_button();
2329: $r->print(<<END);
2330: <table>
2331: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2332: <tr>
2333: <td><input type="text" name="status" value="" size="30" /></td>
2334: <td><input type="text" name="count" value="" size="10" /></td>
2335: <td><input type="text" name="seconds" value="" size="8" /></td>
2336: <td>$revise</td>
2337: </tr>
2338: </table>
2339: </form>
2340: END
2341: $r->rflush();
2342: &reset_timing();
2343: &update_seconds($r);
2344: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2345: while (&time_left() &&
2346: ((@Servers_to_contact) || keys(%Server_status))) {
2347: &update_seconds($r);
2348: #
2349: # Send out a search request
2350: if (@Servers_to_contact) {
2351: # Contact one server
2352: my $server = shift(@Servers_to_contact);
2353: &update_status($r,&mt('contacting [_1]',$server));
2354: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2355: $customshow,[$server]);
2356: ($server) = keys(%$reply);
2357: $Server_status{$server} = $reply->{$server};
2358: } else {
2359: # wait a sec. to give time for files to be written
2360: # This sleep statement is here instead of outside the else
2361: # block because we do not want to pause if we have servers
2362: # left to contact.
2363: if (scalar (keys(%Server_status))) {
2364: &update_status($r,
2365: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2366: }
2367: sleep(1);
2368: }
2369: #
2370: # Loop through the servers we have contacted but do not
2371: # have results from yet, looking for results.
2372: foreach my $server (keys(%Server_status)) {
2373: last if ($connection->aborted());
2374: &update_seconds($r);
2375: my $status = $Server_status{$server};
2376: if ($status eq 'con_lost') {
2377: delete ($Server_status{$server});
2378: next;
2379: }
2380: $status=~/^([\.\w]+)$/;
2381: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2382: if (-e $datafile && ! -e "$datafile.end") {
2383: &update_status($r,&mt('Receiving results from [_1]',$server));
2384: next;
2385: }
2386: last if ($connection->aborted());
2387: if (-e "$datafile.end") {
2388: &update_status($r,&mt('Reading results from [_1]',$server));
2389: if (-z "$datafile") {
2390: delete($Server_status{$server});
2391: next;
2392: }
2393: my $fh;
2394: if (!($fh=Apache::File->new($datafile))) {
2395: $r->print("Unable to open search results file for ".
2396: "server $server. Omitting from search");
2397: delete($Server_status{$server});
2398: next;
2399: }
2400: # Read in the whole file.
2401: while (my $result = <$fh>) {
2402: last if ($connection->aborted());
2403: #
2404: # Records are stored one per line
2405: chomp($result);
2406: next if (! $result);
2407: #
2408: # Parse the result.
2409: my %Fields = &parse_raw_result($result,$server);
2410: $Fields{'hostname'} = $server;
2411: #
2412: # Skip based on copyright
2413: next if (! ©right_check(\%Fields));
2414: #
2415: # Store the result in the mysql database
2416: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2417: if (! defined($result)) {
2418: $r->print(&Apache::lonmysql::get_error());
2419: }
2420: #
2421: $hitcountsum ++;
2422: &update_seconds($r);
2423: if ($hitcountsum % 50 == 0) {
2424: &update_count_status($r,$hitcountsum);
2425: }
2426: }
2427: $fh->close();
2428: # $server is only deleted if the results file has been
2429: # found and (successfully) opened. This may be a bad idea.
2430: delete($Server_status{$server});
2431: }
2432: last if ($connection->aborted());
2433: &update_count_status($r,$hitcountsum);
2434: }
2435: last if ($connection->aborted());
2436: &update_seconds($r);
2437: }
2438: &update_status($r,&mt('Search Complete [_1]',$server));
2439: &update_seconds($r);
2440: #
2441: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2442: #
2443: # We have run out of time or run out of servers to talk to and
2444: # results to get, so let the client know the top frame needs to be
2445: # loaded from /adm/searchcat
2446: $r->print("</body></html>");
2447: # if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2448: $r->print("<script>".
2449: "window.location='/adm/searchcat?".
2450: "phase=sort&".
2451: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2452: "</script>");
2453: # }
2454: return;
2455: }
2456:
2457: ######################################################################
2458: ######################################################################
2459:
2460: =pod
2461:
2462: =item &prev_next_buttons()
2463:
2464: Returns html for the previous and next buttons on the search results page.
2465:
2466: =cut
2467:
2468: ######################################################################
2469: ######################################################################
2470: sub prev_next_buttons {
2471: my ($current_min,$show,$total,$parms) = @_;
2472: return '' if ($show eq 'all'); # No links if you get them all at once.
2473: #
2474: # Create buttons
2475: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2476: $buttons .= '/>';
2477: $buttons .= ' 'x3;
2478: $buttons .= '<input type="submit" name="reload" '.
2479: 'value="'.&mt('Reload').'" />';
2480: $buttons .= ' 'x3;
2481: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2482: $buttons .= '/>';
2483: return $buttons;
2484: }
2485:
2486: ######################################################################
2487: ######################################################################
2488:
2489: =pod
2490:
2491: =item &display_results()
2492:
2493: Prints the results out for selection and perusal.
2494:
2495: =cut
2496:
2497: ######################################################################
2498: ######################################################################
2499: sub display_results {
2500: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2501: my $connection = $r->connection;
2502: $r->print(&search_results_header($importbutton,$closebutton));
2503: ##
2504: ## Set viewing function
2505: ##
2506: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2507: if (!defined($viewfunction)) {
2508: $r->print("Internal Error - Bad view selected.\n");
2509: $r->rflush();
2510: return;
2511: }
2512: ##
2513: ## $checkbox_num is a count of the number of checkboxes output on the
2514: ## page this is used only during catalogmode=groupsearch.
2515: my $checkbox_num = 0;
2516: ##
2517: ## Get the catalog controls setup
2518: ##
2519: my $action = "/adm/searchcat?phase=results";
2520: ##
2521: ## Deal with groupsearch by opening the groupsearch db file.
2522: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2523: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2524: &GDBM_WRCREAT(),0640)) {
2525: $r->print('Unable to store import results.</form></body></html>');
2526: $r->rflush();
2527: return;
2528: }
2529: }
2530: ##
2531: ## Prepare the table for querying
2532: my $table = $ENV{'form.table'};
2533: return if (! &ensure_db_and_table($r,$table));
2534: ##
2535: ## Get the number of results
2536: my $total_results = &Apache::lonmysql::number_of_rows($table);
2537: if (! defined($total_results)) {
2538: $r->print("A MySQL error has occurred.</form></body></html>");
2539: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2540: " of rows in table ".$table);
2541: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2542: return;
2543: }
2544: ##
2545: ## Determine how many results we need to get
2546: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2547: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
2548: if (exists($ENV{'form.prev'})) {
2549: $ENV{'form.start'} -= $ENV{'form.show'};
2550: } elsif (exists($ENV{'form.next'})) {
2551: $ENV{'form.start'} += $ENV{'form.show'};
2552: }
2553: $ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
2554: $ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
2555: my $min = $ENV{'form.start'};
2556: my $max;
2557: if ($ENV{'form.show'} eq 'all') {
2558: $max = $total_results ;
2559: } else {
2560: $max = $min + $ENV{'form.show'} - 1;
2561: $max = $total_results if ($max > $total_results);
2562: }
2563: ##
2564: ## Output form elements
2565: $r->print(&hidden_field('table').
2566: &hidden_field('phase').
2567: &hidden_field('persistent_db_id').
2568: &hidden_field('start')
2569: );
2570: ##
2571: ## Output links (if necessary) for 'prev' and 'next' pages.
2572: $r->print
2573: ('<table width="100%"><tr><td width="50%" align="right">'.
2574: &prev_next_buttons($min,$ENV{'form.show'},$total_results).
2575: '</td><td align="right">'.
2576: &viewoptions().'</td></tr></table>'
2577: );
2578: if ($total_results == 0) {
2579: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2580: '<h3>'.&mt('There are currently no results').'.</h3>'.
2581: "</form></body></html>");
2582: return;
2583: } else {
2584: $r->print
2585: ("<center>Results $min to $max out of $total_results</center>\n");
2586: }
2587: ##
2588: ## Get results from MySQL table
2589: my @Results = &Apache::lonmysql::get_rows($table,
2590: 'id>='.$min.' AND id<='.$max);
2591: ##
2592: ## Loop through the results and output them.
2593: foreach my $row (@Results) {
2594: if ($connection->aborted()) {
2595: &cleanup();
2596: return;
2597: }
2598: my %Fields = %{&parse_row(@$row)};
2599: my $output="<p>\n";
2600: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2601: $Fields{'title'} = 'Untitled';
2602: }
2603: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2604: $Fields{'id'},$checkbox_num++);
2605: # Render the result into html
2606: $output.= &$viewfunction($prefix,%Fields);
2607: # Print them out as they come in.
2608: $r->print($output);
2609: $r->rflush();
2610: }
2611: if (@Results < 1) {
2612: $r->print(&mt("There were no results matching your query"));
2613: } else {
2614: $r->print
2615: ('<center>'.
2616: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2617: "table=".$ENV{'form.table'}.
2618: "&phase=results".
2619: "&persistent_db_id=".
2620: $ENV{'form.persistent_db_id'})
2621: ."</center>\n"
2622: );
2623: }
2624: $r->print("</form></body></html>");
2625: $r->rflush();
2626: untie %groupsearch_db if (tied(%groupsearch_db));
2627: return;
2628: }
2629:
2630: ######################################################################
2631: ######################################################################
2632:
2633: =pod
2634:
2635: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2636:
2637: Returns html needed for the various catalog modes. Gets inputs from
2638: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2639:
2640: =cut
2641:
2642: ######################################################################
2643: ######################################################################
2644: sub catalogmode_output {
2645: my $output = '';
2646: my ($title,$url,$fnum,$checkbox_num) = @_;
2647: if ($ENV{'form.catalogmode'} eq 'interactive') {
2648: $title=~ s/\'/\\\'/g;
2649: if ($ENV{'form.catalogmode'} eq 'interactive') {
2650: $output.=<<END
2651: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2652: onClick="javascript:select_data('$title','$url')">
2653: </font>
2654: END
2655: }
2656: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2657: $groupsearch_db{"pre_${fnum}_link"}=$url;
2658: $groupsearch_db{"pre_${fnum}_title"}=$title;
2659: $output.=<<END;
2660: <font size='-1'>
2661: <input type="checkbox" name="returnvalues" value="SELECT"
2662: onClick="javascript:queue($checkbox_num,$fnum)" />
2663: </font>
2664: END
2665: }
2666: return $output;
2667: }
2668: ######################################################################
2669: ######################################################################
2670:
2671: =pod
2672:
2673: =item &parse_row()
2674:
2675: Parse a row returned from the database.
2676:
2677: =cut
2678:
2679: ######################################################################
2680: ######################################################################
2681: sub parse_row {
2682: my @Row = @_;
2683: my %Fields;
2684: if (! scalar(@Datatypes)) {
2685: &set_up_table_structure();
2686: }
2687: for (my $i=0;$i<=$#Row;$i++) {
2688: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2689: }
2690: $Fields{'language'} =
2691: &Apache::loncommon::languagedescription($Fields{'language'});
2692: $Fields{'copyrighttag'} =
2693: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2694: $Fields{'mimetag'} =
2695: &Apache::loncommon::filedescription($Fields{'mime'});
2696: return \%Fields;
2697: }
2698:
2699: ###########################################################
2700: ###########################################################
2701:
2702: =pod
2703:
2704: =item &parse_raw_result()
2705:
2706: Takes a line from the file of results and parse it. Returns a hash
2707: with keys according to column labels
2708:
2709: In addition, the following tags are set by calling the appropriate
2710: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2711:
2712: The 'title' field is set to "Untitled" if the title field is blank.
2713:
2714: 'abstract' and 'keywords' are truncated to 200 characters.
2715:
2716: =cut
2717:
2718: ###########################################################
2719: ###########################################################
2720: sub parse_raw_result {
2721: my ($result,$hostname) = @_;
2722: # conclude from self to others regarding fields
2723: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2724: (map {
2725: &Apache::lonnet::unescape($_);
2726: } (split(/\,/,$result)) );
2727: return %Fields;
2728: }
2729:
2730: ###########################################################
2731: ###########################################################
2732:
2733: =pod
2734:
2735: =item &handle_custom_fields()
2736:
2737: =cut
2738:
2739: ###########################################################
2740: ###########################################################
2741: sub handle_custom_fields {
2742: my @results = @{shift()};
2743: my $customshow='';
2744: my $extrashow='';
2745: my @customfields;
2746: if ($ENV{'form.customshow'}) {
2747: $customshow=$ENV{'form.customshow'};
2748: $customshow=~s/[^\w\s]//g;
2749: my @fields=map {
2750: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2751: } split(/\s+/,$customshow);
2752: @customfields=split(/\s+/,$customshow);
2753: if ($customshow) {
2754: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2755: }
2756: }
2757: my $customdata='';
2758: my %customhash;
2759: foreach my $result (@results) {
2760: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2761: my $tmp=$result;
2762: $tmp=~s/^custom\=//;
2763: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2764: } split(/\,/,$tmp);
2765: $customhash{$k}=$v;
2766: }
2767: }
2768: return ($extrashow,\@customfields,\%customhash);
2769: }
2770:
2771: ######################################################################
2772: ######################################################################
2773:
2774: =pod
2775:
2776: =item &search_results_header()
2777:
2778: Output the proper html headers and javascript code to deal with different
2779: calling modes.
2780:
2781: Takes most inputs directly from %ENV, except $mode.
2782:
2783: =over 4
2784:
2785: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2786:
2787: =back
2788:
2789: The following environment variables are checked:
2790:
2791: =over 4
2792:
2793: =item 'form.catalogmode'
2794:
2795: Checked for 'interactive' and 'groupsearch'.
2796:
2797: =item 'form.mode'
2798:
2799: Checked for existance & 'edit' mode.
2800:
2801: =item 'form.form'
2802:
2803: Contains the name of the form that has the input fields to set
2804:
2805: =item 'form.element'
2806:
2807: the name of the input field to put the URL into
2808:
2809: =item 'form.titleelement'
2810:
2811: the name of the input field to put the title into
2812:
2813: =back
2814:
2815: =cut
2816:
2817: ######################################################################
2818: ######################################################################
2819: sub search_results_header {
2820: my ($importbutton,$closebutton) = @_;
2821: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2822: my $result = '';
2823: # output beginning of search page
2824: # conditional output of script functions dependent on the mode in
2825: # which the search was invoked
2826: if ($ENV{'form.catalogmode'} eq 'interactive'){
2827: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2828: $result.=<<SCRIPT;
2829: <script type="text/javascript">
2830: function select_data(title,url) {
2831: changeTitle(title);
2832: changeURL(url);
2833: parent.close();
2834: }
2835: function changeTitle(val) {
2836: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2837: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2838: }
2839: }
2840: function changeURL(val) {
2841: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2842: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2843: }
2844: }
2845: </script>
2846: SCRIPT
2847: } elsif ($ENV{'form.mode'} eq 'edit') {
2848: my $form = $ENV{'form.form'};
2849: my $element = $ENV{'form.element'};
2850: my $titleelement = $ENV{'form.titleelement'};
2851: my $changetitle;
2852: if (!$titleelement) {
2853: $changetitle='function changeTitle(val) {}';
2854: } else {
2855: $changetitle=<<END;
2856: function changeTitle(val) {
2857: if (parent.targetwin.document) {
2858: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2859: } else {
2860: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2861: alert("Unable to transfer data to "+url);
2862: }
2863: }
2864: END
2865: }
2866:
2867: $result.=<<SCRIPT;
2868: <script type="text/javascript">
2869: function select_data(title,url) {
2870: changeURL(url);
2871: changeTitle(title);
2872: parent.close();
2873: }
2874: $changetitle
2875: function changeURL(val) {
2876: if (parent.targetwin.document) {
2877: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2878: } else {
2879: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2880: alert("Unable to transfer data to "+url);
2881: }
2882: }
2883: </script>
2884: SCRIPT
2885: }
2886: }
2887: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2888: <script type="text/javascript">
2889: function queue(checkbox_num,val) {
2890: if (document.forms.results.returnvalues.length != "undefined" &&
2891: typeof(document.forms.results.returnvalues.length) == "number") {
2892: if (document.forms.results.returnvalues[checkbox_num].checked) {
2893: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2894: } else {
2895: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2896: }
2897: } else {
2898: if (document.forms.results.returnvalues.checked) {
2899: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2900: } else {
2901: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2902: }
2903: }
2904: }
2905: function select_group() {
2906: parent.window.location=
2907: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2908: parent.statusframe.document.forms.statusform.elements.Queue.value;
2909: }
2910: </script>
2911: SCRIPT
2912: $result.=<<END;
2913: </head>
2914: $bodytag
2915: <form name="results" method="post" action="/adm/searchcat" >
2916: <input type="hidden" name="Queue" value="" />
2917: $importbutton
2918: END
2919: return $result;
2920: }
2921:
2922: ######################################################################
2923: ######################################################################
2924: sub search_status_header {
2925: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2926: return <<ENDSTATUS;
2927: <html><head><title>Search Status</title></head>
2928: $bodytag
2929: <h3>Search Status</h3>
2930: Sending search request to LON-CAPA servers.<br />
2931: ENDSTATUS
2932: }
2933:
2934: sub results_link {
2935: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2936: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2937: my $results_link = $basic_link."&phase=results".
2938: "&pause=1"."&start=1";
2939: return $results_link;
2940: }
2941:
2942: ######################################################################
2943: ######################################################################
2944: sub print_frames_interface {
2945: my $r = shift;
2946: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2947: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2948: my $run_search_link = $basic_link."&phase=run_search";
2949: my $results_link = &results_link();
2950: my $result = <<"ENDFRAMES";
2951: <html>
2952: <head>
2953: <script>
2954: var targetwin = opener;
2955: var queue = '';
2956: </script>
2957: <title>LON-CAPA Digital Library Search Results</title>
2958: </head>
2959: <frameset rows="150,*">
2960: <frame name="statusframe" src="$run_search_link">
2961: <frame name="resultsframe" src="$results_link">
2962: </frameset>
2963: </html>
2964: ENDFRAMES
2965:
2966: $r->print($result);
2967: return;
2968: }
2969:
2970: ######################################################################
2971: ######################################################################
2972:
2973: sub has_stat_data {
2974: my ($values) = @_;
2975: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2976: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2977: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2978: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2979: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2980: return 1;
2981: }
2982: return 0;
2983: }
2984:
2985: sub statfields {
2986: return ('count','stdno','disc','avetries','difficulty');
2987: }
2988:
2989: sub has_eval_data {
2990: my ($values) = @_;
2991: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2992: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2993: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2994: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2995: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
2996: return 1;
2997: }
2998: return 0;
2999: }
3000:
3001: sub evalfields {
3002: return ('clear','technical','correct','helpful','depth');
3003: }
3004:
3005: ######################################################################
3006: ######################################################################
3007:
3008: =pod
3009:
3010: =item Metadata Viewing Functions
3011:
3012: Output is a HTML-ified string.
3013:
3014: Input arguments are title, author, subject, url, keywords, version,
3015: notes, short abstract, mime, language, creation date,
3016: last revision date, owner, copyright, hostname, and
3017: extra custom metadata to show.
3018:
3019: =over 4
3020:
3021: =item &detailed_citation_view()
3022:
3023: =cut
3024:
3025: ######################################################################
3026: ######################################################################
3027: sub detailed_citation_view {
3028: my ($prefix,%values) = @_;
3029: my $result;
3030: $result .= '<b>'.$prefix.
3031: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
3032: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
3033: 'target="search_preview">'.$values{'title'}."</a></b>\n";
3034: $result .= "<p>\n";
3035: $result .= '<b>'.$values{'author'}.'</b>,'.
3036: ' <i>'.$values{'owner'}.'</i><br />';
3037: foreach my $field
3038: (
3039: { name=>'url',
3040: translate => '<b>URL:</b> [_1]',
3041: special => 'url link',},
3042: { name=>'subject',
3043: translate => '<b>Subject:</b> [_1]',},
3044: { name=>'keywords',
3045: translate => '<b>Keywords:</b> [_1]',},
3046: { name=>'notes',
3047: translate => '<b>Notes:</b> [_1]',},
3048: { name=>'mimetag',
3049: translate => '<b>MIME Type:</b> [_1]',},
3050: { name=>'standards',
3051: translate => '<b>Standards:</b>[_1]',},
3052: { name=>'copyrighttag',
3053: translate => '<b>Copyright/Distribution:</b> [_1]',},
3054: { name=>'count',
3055: format => "%d",
3056: translate => '<b>Access Count:</b> [_1]',},
3057: { name=>'stdno',
3058: format => "%d",
3059: translate => '<b>Number of Students:</b> [_1]',},
3060: { name=>'avetries',
3061: format => "%.2f",
3062: translate => '<b>Average Tries:</b> [_1]',},
3063: { name=>'disc',
3064: format => "%.2f",
3065: translate => '<b>Degree of Discrimination:</b> [_1]',},
3066: { name=>'difficulty',
3067: format => "%.2f",
3068: translate => '<b>Degree of Difficulty:</b> [_1]',},
3069: { name=>'clear',
3070: format => "%.2f",
3071: translate => '<b>Clear:</b> [_1]',},
3072: { name=>'depth',
3073: format => "%.2f",
3074: translate => '<b>Depth:</b> [_1]',},
3075: { name=>'helpful',
3076: format => "%.2f",
3077: translate => '<b>Helpful:</b> [_1]',},
3078: { name=>'correct',
3079: format => "%.2f",
3080: translate => '<b>Correct:</b> [_1]',},
3081: { name=>'technical',
3082: format => "%.2f",
3083: translate => '<b>Technical:</b> [_1]',},
3084: { name=>'comefrom_list',
3085: type => 'list',
3086: translate => 'Resources that lead up to this resource in maps',},
3087: { name=>'goto_list',
3088: type => 'list',
3089: translate => 'Resources that follow this resource in maps',},
3090: { name=>'sequsage_list',
3091: type => 'list',
3092: translate => 'Resources using or importing resource',},
3093: ) {
3094: next if (! exists($values{$field->{'name'}}) ||
3095: $values{$field->{'name'}} eq '');
3096: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3097: $result .= '<b>'.&mt($field->{'translate'}).'</b><ul>';
3098: foreach my $item (split(',',$values{$field->{'name'}})){
3099: $result .= '<li>'.
3100: '<a target="search_preview" '.
3101: 'href="/res/'.$item.'">'.$item.'</a></li>';
3102: }
3103: $result .= '</ul>';
3104: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3105: $result.= &mt($field->{'translate'},
3106: sprintf($field->{'format'},
3107: $values{$field->{'name'}}))."<br />\n";
3108: } else {
3109: if ($field->{'special'} eq 'url link') {
3110: $result.=
3111: &mt($field->{'translate'},
3112: '<a href="'.$values{'url'}.'" '.
3113: 'target="search_preview">'.
3114: $values{$field->{'name'}}.
3115: '</a>');
3116: } else {
3117: $result.= &mt($field->{'translate'},
3118: $values{$field->{'name'}});
3119: }
3120: $result .= "<br />\n";
3121: }
3122: }
3123: $result .= "</p>";
3124: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3125: $result .= '<p>'.$values{'extrashow'}.'</p>';
3126: }
3127: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3128: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3129: }
3130: $result .= '<hr align="left" width="200" noshade />'."\n";
3131: return $result;
3132: }
3133:
3134: ######################################################################
3135: ######################################################################
3136:
3137: =pod
3138:
3139: =item &summary_view()
3140:
3141: =cut
3142: ######################################################################
3143: ######################################################################
3144: sub summary_view {
3145: my ($prefix,%values) = @_;
3146: my $icon=&Apache::loncommon::icon($values{'url'});
3147: my $result=<<END;
3148: $prefix<img src="$icon" />
3149: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3150: target='search_preview'>$values{'author'}</a><br />
3151: $values{'title'}<br />
3152: $values{'owner'} -- $values{'lastrevisiondate'}<br />
3153: $values{'copyrighttag'}<br />
3154: $values{'extrashow'}
3155: </p>
3156: <hr align='left' width='200' noshade />
3157: END
3158: return $result;
3159: }
3160:
3161: ######################################################################
3162: ######################################################################
3163:
3164: =pod
3165:
3166: =item &compact_view()
3167:
3168: =cut
3169:
3170: ######################################################################
3171: ######################################################################
3172: sub compact_view {
3173: my ($prefix,%values) = @_;
3174: my $result =
3175: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
3176: '"> <a href="'.$values{'url'}.'" target="search_preview">'.
3177: $values{'title'}.'</a>'.(' 'x2).
3178: '<b>'.$values{'author'}.'</b><br />';
3179: return $result;
3180: }
3181:
3182:
3183: ######################################################################
3184: ######################################################################
3185:
3186: =pod
3187:
3188: =item &fielded_format_view()
3189:
3190: =cut
3191:
3192: ######################################################################
3193: ######################################################################
3194: sub fielded_format_view {
3195: my ($prefix,%values) = @_;
3196: my $icon=&Apache::loncommon::icon($values{'url'});
3197: my %Translated = &Apache::lonmeta::fieldnames();
3198: my $result=<<END;
3199: $prefix <img src="$icon" />
3200: <dl>
3201: <dt>URL:</dt>
3202: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3203: target='search_preview'>$values{'url'}</a></dd>
3204: END
3205: foreach my $field ('title','author','subject','keywords','notes',
3206: 'mimetag','language','creationdate','lastrevisiondate',
3207: 'owner','copyrighttag','hostname','abstract') {
3208: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3209: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3210: }
3211: if (&has_stat_data(\%values)) {
3212: foreach my $field (&statfields()) {
3213: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3214: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3215: }
3216: }
3217: if (&has_eval_data(\%values)) {
3218: foreach my $field (&evalfields()) {
3219: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3220: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3221: }
3222: }
3223: $result .= "</dl>\n";
3224: $result .= $values{'extrashow'};
3225: $result .= '<hr align="left" width="200" noshade />'."\n";
3226: return $result;
3227: }
3228:
3229: ######################################################################
3230: ######################################################################
3231:
3232: =pod
3233:
3234: =item &xml_sgml_view()
3235:
3236: =back
3237:
3238: =cut
3239:
3240: ######################################################################
3241: ######################################################################
3242: sub xml_sgml_view {
3243: my ($prefix,%values) = @_;
3244: my $xml = '<LonCapaResource>'."\n";
3245: # The usual suspects
3246: foreach my $field ('url','title','author','subject','keywords','notes') {
3247: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3248: }
3249: #
3250: $xml .= "<mimeInfo>\n";
3251: foreach my $field ('mime','mimetag') {
3252: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3253: }
3254: $xml .= "</mimeInfo>\n";
3255: #
3256: $xml .= "<languageInfo>\n";
3257: foreach my $field ('language','languagetag') {
3258: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3259: }
3260: $xml .= "</languageInfo>\n";
3261: #
3262: foreach my $field ('creationdate','lastrevisiondate','owner') {
3263: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3264: }
3265: #
3266: $xml .= "<copyrightInfo>\n";
3267: foreach my $field ('copyright','copyrighttag') {
3268: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3269: }
3270: $xml .= "</copyrightInfo>\n";
3271: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3272: "\n";
3273: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3274: #
3275: if (&has_stat_data(\%values)){
3276: $xml .= "<problemstatistics>\n";
3277: foreach my $field (&statfields()) {
3278: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3279: }
3280: $xml .= "</problemstatistics>\n";
3281: }
3282: #
3283: if (&has_eval_data(\%values)) {
3284: $xml .= "<evaluation>\n";
3285: foreach my $field (&evalfields) {
3286: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3287: }
3288: $xml .= "</evaluation>\n";
3289: }
3290: #
3291: $xml .= "</LonCapaResource>\n";
3292: $xml = &HTML::Entities::encode($xml,'<>&');
3293: my $result=<<END;
3294: $prefix
3295: <pre>
3296: $xml
3297: </pre>
3298: $values{'extrashow'}
3299: <hr align='left' width='200' noshade />
3300: END
3301: return $result;
3302: }
3303:
3304: ######################################################################
3305: ######################################################################
3306:
3307: =pod
3308:
3309: =item &filled() see if field is filled.
3310:
3311: =cut
3312:
3313: ######################################################################
3314: ######################################################################
3315: sub filled {
3316: my ($field)=@_;
3317: if ($field=~/\S/ && $field ne 'any') {
3318: return 1;
3319: } else {
3320: return 0;
3321: }
3322: }
3323:
3324: ######################################################################
3325: ######################################################################
3326:
3327: =pod
3328:
3329: =item &output_unparsed_phrase_error()
3330:
3331: =cut
3332:
3333: ######################################################################
3334: ######################################################################
3335: sub output_unparsed_phrase_error {
3336: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3337: my $errorstring;
3338: if ($field eq 'basicexp') {
3339: $errorstring = &mt('Unable to understand the search phrase <i>[_1]</i>. Please modify your search.',$ENV{'form.basicexp'});
3340: } else {
3341: $errorstring = &mt('Unable to understand the search phrase <b>[_1]</b>:<i>[_2]</i>.',$field,$ENV{'form.'.$field});
3342: }
3343: my $bodytag = &Apache::loncommon::bodytag('Search');
3344: my $heading = &mt('Unparsed Field');
3345: my $revise = &mt('Revise search request');
3346: # make query information persistent to allow for subsequent revision
3347: $r->print(<<ENDPAGE);
3348: <html>
3349: <head>
3350: <title>The LearningOnline Network with CAPA</title>
3351: </head>
3352: $bodytag
3353: <form method="post" action="/adm/searchcat">
3354: $hidden_fields
3355: $closebutton
3356: <hr />
3357: <h2>$heading</h2>
3358: <p>
3359: $errorstring
3360: </p>
3361: <p>
3362: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3363: </p>
3364: </body>
3365: </html>
3366: ENDPAGE
3367: }
3368:
3369: ######################################################################
3370: ######################################################################
3371:
3372: =pod
3373:
3374: =item &output_blank_field_error()
3375:
3376: Output a complete page that indicates the user has not filled in enough
3377: information to do a search.
3378:
3379: Inputs: $r (Apache request handle), $closebutton, $parms.
3380:
3381: Returns: nothing
3382:
3383: $parms is extra information to include in the 'Revise search request' link.
3384:
3385: =cut
3386:
3387: ######################################################################
3388: ######################################################################
3389: sub output_blank_field_error {
3390: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3391: my $bodytag=&Apache::loncommon::bodytag('Search');
3392: my $errormsg = &mt('You did not fill in enough information for the search to be started. You need to fill in relevant fields on the search page in order for a query to be processed.');
3393: my $revise = &mt('Revise Search Request');
3394: my $heading = &mt('Unactionable Search Queary');
3395: $r->print(<<ENDPAGE);
3396: <html>
3397: <head>
3398: <title>The LearningOnline Network with CAPA</title>
3399: </head>
3400: $bodytag
3401: <form method="post" action="/adm/searchcat">
3402: $hidden_fields
3403: $closebutton
3404: <hr />
3405: <h2>$heading</h2>
3406: <p>
3407: $errormsg
3408: </p>
3409: <p>
3410: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3411: </p>
3412: </body>
3413: </html>
3414: ENDPAGE
3415: return;
3416: }
3417:
3418: ######################################################################
3419: ######################################################################
3420:
3421: =pod
3422:
3423: =item &output_date_error()
3424:
3425: Output a full html page with an error message.
3426:
3427: Inputs:
3428:
3429: $r, the request pointer.
3430: $message, the error message for the user.
3431: $closebutton, the specialized close button needed for groupsearch.
3432:
3433: =cut
3434:
3435: ######################################################################
3436: ######################################################################
3437: sub output_date_error {
3438: my ($r,$message,$closebutton,$hidden_fields)=@_;
3439: # make query information persistent to allow for subsequent revision
3440: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3441: $r->print(<<RESULTS);
3442: <html>
3443: <head>
3444: <title>The LearningOnline Network with CAPA</title>
3445: </head>
3446: $bodytag
3447: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3448: <h1>Search Catalog</h1>
3449: <form method="post" action="/adm/searchcat">
3450: $hidden_fields
3451: <input type='button' value='Revise search request'
3452: onClick='this.form.submit();' />
3453: $closebutton
3454: <hr />
3455: <h3>Error</h3>
3456: <p>
3457: $message
3458: </p>
3459: </body>
3460: </html>
3461: RESULTS
3462: }
3463:
3464: ######################################################################
3465: ######################################################################
3466:
3467: =pod
3468:
3469: =item &start_fresh_session()
3470:
3471: Cleans the global %groupsearch_db by removing all fields which begin with
3472: 'pre_' or 'store'.
3473:
3474: =cut
3475:
3476: ######################################################################
3477: ######################################################################
3478: sub start_fresh_session {
3479: delete $groupsearch_db{'mode_catalog'};
3480: foreach (keys %groupsearch_db) {
3481: if ($_ =~ /^pre_/) {
3482: delete $groupsearch_db{$_};
3483: }
3484: if ($_ =~ /^store/) {
3485: delete $groupsearch_db{$_};
3486: }
3487: }
3488: }
3489:
3490: 1;
3491:
3492: sub cleanup {
3493: if (tied(%groupsearch_db)) {
3494: unless (untie(%groupsearch_db)) {
3495: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3496: }
3497: }
3498: &untiehash();
3499: &Apache::lonmysql::disconnect_from_db();
3500: }
3501:
3502: __END__
3503:
3504: =pod
3505:
3506: =back
3507:
3508: =cut
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