1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.230.2.3 2005/02/02 22:03:27 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 %alreadyseen;
448: my %hash;
449: my $totalfound;
450:
451: sub make_symb {
452: my ($id)=@_;
453: my ($mapid,$resid)=split(/\./,$id);
454: my $map=$hash{'map_id_'.$mapid};
455: my $res=$hash{'src_'.$id};
456: my $symb=&Apache::lonnet::encode_symb($map,$resid,$res);
457: return $symb;
458: }
459:
460: sub course_search {
461: my $r=shift;
462: my $bodytag=&Apache::loncommon::bodytag('Course Search');
463: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
464: my $search_string = $ENV{'form.courseexp'};
465: my @New_Words;
466: undef(%alreadyseen);
467: if ($ENV{'form.crsrelated'}) {
468: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
469: if (@New_Words) {
470: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
471: } else {
472: $pretty_search_string .= ' '.&mt('with no related words').".";
473: }
474: }
475: my $fulltext=$ENV{'form.crsfulltext'};
476: my @allwords=($search_string,@New_Words);
477: $totalfound=0;
478: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
479: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
480: $r->rflush();
481: # ======================================================= Go through the course
482: my $c=$r->connection;
483: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
484: &GDBM_READER(),0640)) {
485: foreach (sort(keys(%hash))) {
486: if ($c->aborted()) { last; }
487: if (($_=~/^src\_(.+)$/)) {
488: if ($hash{'randomout_'.$1} & !$ENV{'request.role.adv'}) {
489: next;
490: }
491: my $symb=&make_symb($1);
492: &checkonthis($r,$1,$hash{$_},0,&Apache::lonnet::gettitle($symb),
493: $fulltext,$symb,@allwords);
494: }
495: }
496: untie(%hash);
497: }
498: unless ($totalfound) {
499: $r->print('<p>'.&mt('No resources found').'.</p>');
500: }
501: # =================================================== Done going through course
502: $r->print('</body></html>');
503: }
504:
505: # =============================== This pulls up a resource and its dependencies
506:
507: sub checkonthis {
508: my ($r,$id,$url,$level,$title,$fulltext,$symb,@allwords)=@_;
509: $alreadyseen{$id}=1;
510: if (&Apache::loncommon::connection_aborted($r)) { return; }
511: $r->rflush();
512:
513: my $result=$title.' ';
514: if ($ENV{'request.role.adv'} || !$hash{'encrypted_'.$id}) {
515: $result.=&Apache::lonnet::metadata($url,'title').' '.
516: &Apache::lonnet::metadata($url,'subject').' '.
517: &Apache::lonnet::metadata($url,'abstract').' '.
518: &Apache::lonnet::metadata($url,'keywords');
519: }
520: my ($extension)=($url=~/\.(\w+)$/);
521: if (&Apache::loncommon::fileembstyle($extension) eq 'ssi' &&
522: ($url) && ($fulltext)) {
523: $result.=&Apache::lonnet::ssi_body($url.'?symb='.&Apache::lonnet::escape($symb));
524: }
525: $result=~s/\s+/ /gs;
526: my $applies=0;
527: foreach (@allwords) {
528: if ($_=~/\w/) {
529: if ($result=~/$_/si) {
530: $applies++;
531: }
532: }
533: }
534: # Does this resource apply?
535: if ($applies) {
536: $r->print('<br />');
537: for (my $i=0;$i<=$level*5;$i++) {
538: $r->print(' ');
539: }
540: my $href=$url;
541: if ($hash{'encrypted_'.$id} && !$ENV{'request.role.adv'}) {
542: $href=&Apache::lonenc::encrypted($href)
543: .'?symb='.&Apache::lonenc::encrypted($symb);
544: } else {
545: $href.='?symb='.&Apache::lonnet::escape($symb);
546: }
547: $r->print('<a href="'.$href.'" target="cat">'.($title?$title:$url).
548: '</a><br />');
549: $totalfound++;
550: } elsif ($fulltext) {
551: $r->print(' .');
552: }
553: $r->rflush();
554: # Check also the dependencies of this one
555: my $dependencies=
556: &Apache::lonnet::metadata($url,'dependencies');
557: foreach (split(/\,/,$dependencies)) {
558: if (($_=~/^\/res\//) && (!$alreadyseen{$id})) {
559: &checkonthis($r,$id,$_,$level+1,'',$fulltext,undef,@allwords);
560: }
561: }
562: }
563:
564: sub untiehash {
565: if (tied(%hash)) {
566: untie(%hash);
567: }
568: }
569:
570: } # End of course search scoping
571:
572: sub search_html_header {
573: my $Str = <<ENDHEADER;
574: <html>
575: <head>
576: <title>The LearningOnline Network with CAPA</title>
577: </head>
578: ENDHEADER
579: return $Str;
580: }
581:
582: ######################################################################
583: ######################################################################
584:
585: =pod
586:
587: =item &print_basic_search_form()
588:
589: Prints the form for the basic search. Sorry the name is so cryptic.
590:
591: =cut
592:
593: ######################################################################
594: ######################################################################
595: sub print_basic_search_form {
596: my ($r,$closebutton,$hidden_fields) = @_;
597: my $result = ($ENV{'form.catalogmode'} ne 'groupsearch');
598: my $bodytag=&Apache::loncommon::bodytag('Search').
599: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Search_Basic',
600: undef,undef,
601: $ENV{'form.catalogmode'} ne 'groupsearch');
602: my $scrout = &search_html_header().$bodytag;
603: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
604: # Define interface components
605: my $userelatedwords=
606: &mt('[_1] use related words',
607: &Apache::lonhtmlcommon::checkbox
608: ('related',$ENV{'form.related'},'related'));
609: my $onlysearchdomain=
610: &mt('[_1] only search domain [_2]',
611: &Apache::lonhtmlcommon::checkbox('domains',
612: $ENV{'form.domains'},
613: $r->dir_config('lonDefDomain')
614: ),
615: $r->dir_config('lonDefDomain')
616: );
617: my $adv_search_link =
618: '<a href="/adm/searchcat?'.
619: 'phase=disp_adv&'.
620: 'catalogmode='.$ENV{'form.catalogmode'}.
621: '&launch='.$ENV{'form.launch'}.
622: '&mode='.$ENV{'form.mode'}.
623: '">'.&mt('Advanced Search').'</a>';
624: #
625: $scrout.='<form name="loncapa_search" method="post" '.
626: 'action="/adm/searchcat">'.
627: '<input type="hidden" name="phase" value="basic_search" />'.
628: $hidden_fields;
629: #
630: $scrout .= '<center>'.$/;
631: if ($ENV{'request.course.id'}) {
632: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
633: } else {
634: # No need to tell them they are searching
635: $scrout.= ('<br />'x2);
636: }
637: $scrout.='<table>'.
638: '<tr><td align="center" valign="top">'.
639: &Apache::lonhtmlcommon::textbox
640: ('basicexp',
641: &HTML::Entities::encode($ENV{'form.basicexp'},'<>&"'),50
642: ).
643: '<br />'.
644: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
645: '<td><font size="-1">'.
646: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
647: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
648: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
649: '</font></td>'.
650: '</tr>'.$/;
651: #
652: $scrout .= '<tr><td align="center" colspan="2">'.
653: '<font size="-1">'.
654: '<input type="submit" name="basicsubmit" '.
655: 'value="'.&mt('Search').'" />'.
656: (' 'x2).$closebutton.(' 'x2).
657: &viewoptions().
658: '</font>'.
659: '</td></tr>'.$/;
660: $scrout .= '</table>'.$/.'</center>'.'</form>';
661: }
662: if ($ENV{'request.course.id'}) {
663: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
664: 'header' => 'Course Search',
665: 'note' => 'Enter terms or phrases, then press "Search" below',
666: 'use' => 'use related words',
667: 'full' =>'fulltext search (time consuming)'
668: );
669: $scrout.=(<<ENDCOURSESEARCH);
670: <form name="loncapa_search" method="post" action="/adm/searchcat">
671: <center>
672: <hr />
673: <h1>$lt{'header'}</h1>
674: <input type="hidden" name="phase" value="course_search" />
675: $hidden_fields
676: <p>
677: $lt{'note'}.
678: </p>
679: <p>
680: <table>
681: <tr><td>
682: ENDCOURSESEARCH
683: $scrout.=' '.
684: &Apache::lonhtmlcommon::textbox('courseexp',
685: $ENV{'form.courseexp'},40);
686: my $crscheckbox =
687: &Apache::lonhtmlcommon::checkbox('crsfulltext',
688: $ENV{'form.crsfulltext'});
689: my $relcheckbox =
690: &Apache::lonhtmlcommon::checkbox('crsrelated',
691: $ENV{'form.crsrelated'});
692: $scrout.=(<<ENDENDCOURSE);
693: </td></tr>
694: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
695: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
696: </table><p>
697: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
698: </p>
699: </center>
700: </form>
701: ENDENDCOURSE
702: }
703: $scrout.=(<<ENDDOCUMENT);
704: </body>
705: </html>
706: ENDDOCUMENT
707: $r->print($scrout);
708: return;
709: }
710: ######################################################################
711: ######################################################################
712:
713: =pod
714:
715: =item &advanced_search_form()
716:
717: Prints the advanced search form.
718:
719: =cut
720:
721: ######################################################################
722: ######################################################################
723: sub print_advanced_search_form{
724: my ($r,$closebutton,$hidden_fields) = @_;
725: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
726: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
727: 'Search_Advanced',
728: undef,undef,
729: $ENV{'form.catalogmode'} ne 'groupsearch');
730: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
731: 'reset' => 'Reset',
732: 'help' => 'Help');
733: my $advanced_buttons=<<"END";
734: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
735: <input type="reset" name="reset" value='$lt{"reset"}' />
736: $closebutton
737: END
738: my $scrout=&search_html_header();
739: $scrout .= <<"ENDHEADER";
740: $bodytag
741: <form method="post" action="/adm/searchcat" name="advsearch">
742: <p>
743: $advanced_buttons
744: ENDHEADER
745: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
746: '<input type="hidden" name="phase" value="adv_search" />';
747: my %fields=&Apache::lonmeta::fieldnames();
748: #
749: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
750: $scrout .= "<table>\n";
751: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
752: (' 'x2).&searchhelp()."</font></td></tr>\n";
753: my %related_word_search =
754: ('title' => 1,
755: 'author' => 0,
756: 'owner' => 0,
757: 'authorspace' => 0,
758: 'modifyinguser'=> 0,
759: 'keywords' => 1,
760: 'notes' => 1,
761: 'abstract' => 1,
762: 'standards'=> 1,
763: 'mime' => 1,
764: );
765: #
766: foreach my $field ('title','author','owner','authorspace','modifyinguser',
767: 'keywords','notes','abstract','standards','mime') {
768: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
769: &Apache::lonmeta::prettyinput($field,
770: $ENV{'form.'.$field},
771: $field,
772: 'advsearch',
773: $related_word_search{$field},
774: '</td><td align="left">',
775: $ENV{'form.'.$field.'_related'},
776: 50);
777: if ($related_word_search{$field}) {
778: $scrout .= 'related words';
779: } else {
780: $scrout .= '</td><td> ';
781: }
782: $scrout .= '</td></tr>'.$/;
783: }
784: foreach my $field ('lowestgradelevel','highestgradelevel') {
785: $scrout.='<tr>'.
786: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
787: '<td colspan="2">'.
788: &Apache::lonmeta::prettyinput($field,
789: $ENV{'form.'.$field},
790: $field,
791: 'advsearch',
792: 0).
793: '</td></tr>'.$/;
794: }
795: $scrout.='<tr><td align="right">'.
796: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
797: &Apache::loncommon::filecategoryselect('category',
798: $ENV{'form.category'}).
799: '</td></tr>'.$/;
800: $scrout.='<tr><td align="right" valign="top">'.
801: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
802: &Apache::loncommon::domain_select('domains',
803: $ENV{'form.domains'},1).
804: '</td></tr>'.$/;
805: #
806: # Misc metadata
807: $scrout.='<tr><td align="right" valign="top">'.
808: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
809: &Apache::lonmeta::selectbox('copyright',
810: $ENV{'form.copyright'},
811: \&Apache::loncommon::copyrightdescription,
812: ( undef,
813: &Apache::loncommon::copyrightids)
814: ).'</td></tr>'.$/;
815: $scrout.='<tr><td align="right" valign="top">'.
816: &titlefield(&mt('Language')).'</td><td colspan="2">'.
817: &Apache::lonmeta::selectbox('language',
818: $ENV{'form.language'},
819: \&Apache::loncommon::languagedescription,
820: ('any',&Apache::loncommon::languageids)
821: ).'</td></tr>';
822: $scrout .= "</table>\n";
823: #
824: # Dynamic metadata
825: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
826: $scrout .= "<table>\n";
827: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
828: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
829: foreach my $statistic
830: ({ name=>'count',
831: description=>'Network-wide number of accesses (hits)',},
832: { name=>'stdno',
833: description=>
834: 'Total number of students who have worked on this problem',},
835: { name => 'avetries',
836: description=>'Average number of tries till solved',},
837: { name => 'difficulty',
838: description=>'Degree of difficulty',},
839: { name => 'disc',
840: description=>'Degree of discrimination'}) {
841: $scrout .= '<tr><td align="right">'.
842: &titlefield(&mt($statistic->{'description'})).
843: '</td><td align="center">'.
844: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
845: 'value="" size="6" />'.
846: '</td><td align="center">'.
847: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
848: 'value="" size="6" />'.
849: '</td></tr>'.$/;
850: }
851: $scrout .= "</table>\n";
852: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
853: $scrout .= "<table>\n";
854: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
855: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
856: foreach my $evaluation
857: ( { name => 'clear',
858: description => 'Material presented in clear way'},
859: { name =>'depth',
860: description => 'Material covered with sufficient depth'},
861: { name => 'helpful',
862: description => 'Material is helpful'},
863: { name => 'correct',
864: description => 'Material appears to be correct'},
865: { name => 'technical',
866: description => 'Resource is technically correct'}){
867: $scrout .= '<tr><td align="right">'.
868: &titlefield(&mt($evaluation->{'description'})).
869: '</td><td align="center">'.
870: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
871: 'value="" size="6" />'.
872: '</td><td align="center">'.
873: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
874: 'value="" size="6" />'.
875: '</td></tr>'.$/;
876: }
877: $scrout .= "</table>\n";
878: #
879: # Creation/Modification date limits
880: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
881: $scrout .= "\n<table>\n";
882: my $cafter =
883: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
884: 'creationdate1', # fieldname
885: 0, # current value
886: '', # special
887: 1, # includeempty
888: '', # state
889: 1, # no_hh_mm_ss
890: );
891: my $cbefore =
892: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
893: 'creationdate2', # fieldname
894: 0, # current value
895: '', # special
896: 1, # includeempty
897: '', # state
898: 1, # no_hh_mm_ss
899: );
900: $scrout .= &mt('<tr><td align="right">Created between</td>'.
901: '<td>[_1]</td></tr>'.
902: '<tr><td align="right">and </td>'.
903: '<td>[_2]</td></tr>',$cafter,$cbefore);
904: my $lafter =
905: &Apache::lonhtmlcommon::date_setter('advsearch',
906: 'revisiondate1',
907: 0, # current value
908: '', # special
909: 1, # includeempty
910: '', # state
911: 1, # no_hh_mm_ss
912: );
913: my $lbefore =
914: &Apache::lonhtmlcommon::date_setter('advsearch',
915: 'revisiondate2',
916: 0, # current value
917: '', # special
918: 1, # includeempty
919: '', # state
920: 1, # no_hh_mm_ss
921: );
922: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
923: '<td>[_1]</td></tr>'.
924: '<tr><td align="right">and</td>'.
925: '<td>[_2]</td></tr>',$lafter,$lbefore);
926: $scrout.="</table>\n";
927: $scrout.=<<ENDDOCUMENT;
928: $advanced_buttons
929: </form>
930: </body>
931: </html>
932: ENDDOCUMENT
933: $r->print($scrout);
934: return;
935: }
936:
937: ######################################################################
938: ######################################################################
939:
940: =pod
941:
942: =item &titlefield()
943:
944: Inputs: title text
945:
946: Outputs: titletext with font wrapper
947:
948: =cut
949:
950: ######################################################################
951: ######################################################################
952: sub titlefield {
953: my $title=shift;
954: return $title;
955: }
956:
957: ######################################################################
958: ######################################################################
959:
960: =pod
961:
962: =item viewoptiontext()
963:
964: Inputs: codename for view option
965:
966: Outputs: displayed text
967:
968: =cut
969:
970: ######################################################################
971: ######################################################################
972: sub viewoptiontext {
973: my $code=shift;
974: my %desc=&Apache::lonlocal::texthash
975: ('detailed' => "Detailed Citation View",
976: 'xml' => 'XML/SGML',
977: 'compact' => 'Compact View',
978: 'fielded' => 'Fielded Format',
979: 'summary' => 'Summary View');
980: return $desc{$code};
981: }
982:
983: ######################################################################
984: ######################################################################
985:
986: =pod
987:
988: =item viewoptions()
989:
990: Inputs: none
991:
992: Outputs: text for box with view options
993:
994: =cut
995:
996: ######################################################################
997: ######################################################################
998: sub viewoptions {
999: my $scrout;
1000: if (! defined($ENV{'form.viewselect'})) {
1001: $ENV{'form.viewselect'}='detailed';
1002: }
1003: $scrout.=&Apache::lonmeta::selectbox('viewselect',
1004: $ENV{'form.viewselect'},
1005: \&viewoptiontext,
1006: sort(keys(%Views)));
1007: $scrout.= ' ';
1008: my $countselect = &Apache::lonmeta::selectbox('show',
1009: $ENV{'form.show'},
1010: undef,
1011: (10,20,50,100,1000,10000));
1012: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
1013: '</nobr>'.$/;
1014: return $scrout;
1015: }
1016:
1017: ######################################################################
1018: ######################################################################
1019:
1020: =pod
1021:
1022: =item searchhelp()
1023:
1024: Inputs: none
1025:
1026: Outputs: return little blurb on how to enter searches
1027:
1028: =cut
1029:
1030: ######################################################################
1031: ######################################################################
1032: sub searchhelp {
1033: return &mt('Enter words and quoted phrases');
1034: }
1035:
1036: ######################################################################
1037: ######################################################################
1038:
1039: =pod
1040:
1041: =item &get_persistent_form_data()
1042:
1043: Inputs: filename of database
1044:
1045: Outputs: returns undef on database errors.
1046:
1047: This function is the reverse of &make_persistent() for form data.
1048: Retrieve persistent data from %persistent_db. Retrieved items will have their
1049: values unescaped. If a form value already exists in $ENV, it will not be
1050: overwritten. Form values that are array references may have values appended
1051: to them.
1052:
1053: =cut
1054:
1055: ######################################################################
1056: ######################################################################
1057: sub get_persistent_form_data {
1058: my $filename = shift;
1059: return 0 if (! -e $filename);
1060: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1061: &GDBM_READER(),0640));
1062: #
1063: # These make sure we do not get array references printed out as 'values'.
1064: my %arrays_allowed = ('form.domains'=>1);
1065: #
1066: # Loop through the keys, looking for 'form.'
1067: foreach my $name (keys(%persistent_db)) {
1068: next if ($name !~ /^form./);
1069: # Kludgification begins!
1070: if ($name eq 'form.domains' &&
1071: $ENV{'form.searchmode'} eq 'basic' &&
1072: $ENV{'form.phase'} ne 'disp_basic') {
1073: next;
1074: }
1075: # End kludge (hopefully)
1076: next if (exists($ENV{$name}));
1077: my @values = map {
1078: &Apache::lonnet::unescape($_);
1079: } split(',',$persistent_db{$name});
1080: next if (@values <1);
1081: if ($arrays_allowed{$name}) {
1082: $ENV{$name} = [@values];
1083: } else {
1084: $ENV{$name} = $values[0] if ($values[0]);
1085: }
1086: }
1087: untie (%persistent_db);
1088: return 1;
1089: }
1090:
1091: ######################################################################
1092: ######################################################################
1093:
1094: =pod
1095:
1096: =item &get_persistent_data()
1097:
1098: Inputs: filename of database, ref to array of values to recover.
1099:
1100: Outputs: array of values. Returns undef on error.
1101:
1102: This function is the reverse of &make_persistent();
1103: Retrieve persistent data from %persistent_db. Retrieved items will have their
1104: values unescaped. If the item contains commas (before unescaping), the
1105: returned value will be an array pointer.
1106:
1107: =cut
1108:
1109: ######################################################################
1110: ######################################################################
1111: sub get_persistent_data {
1112: my $filename = shift;
1113: my @Vars = @{shift()};
1114: my @Values; # Return array
1115: return undef if (! -e $filename);
1116: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1117: &GDBM_READER(),0640));
1118: foreach my $name (@Vars) {
1119: if (! exists($persistent_db{$name})) {
1120: push @Values, undef;
1121: next;
1122: }
1123: my @values = map {
1124: &Apache::lonnet::unescape($_);
1125: } split(',',$persistent_db{$name});
1126: if (@values <= 1) {
1127: push @Values,$values[0];
1128: } else {
1129: push @Values,\@values;
1130: }
1131: }
1132: untie (%persistent_db);
1133: return @Values;
1134: }
1135:
1136: ######################################################################
1137: ######################################################################
1138:
1139: =pod
1140:
1141: =item &make_persistent()
1142:
1143: Inputs: Hash of values to save, filename of persistent database.
1144:
1145: Store variables away to the %persistent_db.
1146: Values will be escaped. Values that are array pointers will have their
1147: elements escaped and concatenated in a comma separated string.
1148:
1149: =cut
1150:
1151: ######################################################################
1152: ######################################################################
1153: sub make_persistent {
1154: my %save = %{shift()};
1155: my $filename = shift;
1156: return undef if (! tie(%persistent_db,'GDBM_File',
1157: $filename,&GDBM_WRCREAT(),0640));
1158: foreach my $name (keys(%save)) {
1159: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1160: # We handle array references, but not recursively.
1161: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1162: $persistent_db{$name} = $store;
1163: }
1164: untie(%persistent_db);
1165: return 1;
1166: }
1167:
1168: ######################################################################
1169: ######################################################################
1170:
1171: =pod
1172:
1173: =item &make_form_data_persistent()
1174:
1175: Inputs: filename of persistent database.
1176:
1177: Store most form variables away to the %persistent_db.
1178: Values will be escaped. Values that are array pointers will have their
1179: elements escaped and concatenated in a comma separated string.
1180:
1181: =cut
1182:
1183: ######################################################################
1184: ######################################################################
1185: sub make_form_data_persistent {
1186: my $r = shift;
1187: my $filename = shift;
1188: my %save;
1189: foreach (keys(%ENV)) {
1190: next if (!/^form/ || /submit/);
1191: $save{$_} = $ENV{$_};
1192: }
1193: return &make_persistent(\%save,$filename);
1194: }
1195:
1196: ######################################################################
1197: ######################################################################
1198:
1199: =pod
1200:
1201: =item &parse_advanced_search()
1202:
1203: Parse advanced search form and return the following:
1204:
1205: =over 4
1206:
1207: =item $query Scalar containing an SQL query.
1208:
1209: =item $customquery Scalar containing a custom query.
1210:
1211: =item $customshow Scalar containing commands to show custom metadata.
1212:
1213: =item $libraries_to_query Reference to array of domains to search.
1214:
1215: =back
1216:
1217: =cut
1218:
1219: ######################################################################
1220: ######################################################################
1221: sub parse_advanced_search {
1222: my ($r,$closebutton,$hidden_fields)=@_;
1223: my @BasicFields = ('title','author','subject','keywords','url','version',
1224: 'notes','abstract','extension','owner','authorspace',
1225: # 'custommetadata','customshow',
1226: 'modifyinguser','standards','mime');
1227: my @StatsFields = &statfields();
1228: my @EvalFields = &evalfields();
1229: my $fillflag=0;
1230: my $pretty_search_string = "";
1231: # Clean up fields for safety
1232: for my $field (@BasicFields,
1233: 'creationdatestart_month','creationdatestart_day',
1234: 'creationdatestart_year','creationdateend_month',
1235: 'creationdateend_day','creationdateend_year',
1236: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1237: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1238: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1239: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1240: }
1241: foreach ('mode','form','element') {
1242: # is this required? Hmmm.
1243: next if (! exists($ENV{'form.'.$_}));
1244: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1245: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1246: }
1247: # Preprocess the category form element.
1248: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1249: ref($ENV{'form.category'}));
1250: #
1251: # Check to see if enough information was filled in
1252: foreach my $field (@BasicFields) {
1253: if (&filled($ENV{'form.'.$field})) {
1254: $fillflag++;
1255: }
1256: }
1257: foreach my $field (@StatsFields,@EvalFields) {
1258: if (&filled($ENV{'form.'.$field.'_max'})) {
1259: $fillflag++;
1260: }
1261: if (&filled($ENV{'form.'.$field.'_min'})) {
1262: $fillflag++;
1263: }
1264: }
1265:
1266: for my $field ('lowestgradelevel','highestgradelevel') {
1267: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1268: $ENV{'form.'.$field} > 0) {
1269: $fillflag++;
1270: }
1271: }
1272: if (! $fillflag) {
1273: &output_blank_field_error($r,$closebutton,
1274: 'phase=disp_adv',$hidden_fields);
1275: return ;
1276: }
1277: # Turn the form input into a SQL-based query
1278: my $query='';
1279: my @queries;
1280: my $font = '<font color="#800000" face="helvetica">';
1281: # Evaluate logical expression AND/OR/NOT phrase fields.
1282: foreach my $field (@BasicFields) {
1283: next if (!defined($ENV{'form.'.$field}) || $ENV{'form.'.$field} eq '');
1284: my ($error,$SQLQuery) =
1285: &process_phrase_input($ENV{'form.'.$field},
1286: $ENV{'form.'.$field.'_related'},$field);
1287: if (defined($error)) {
1288: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1289: $hidden_fields,$field);
1290: return;
1291: } else {
1292: $pretty_search_string .=
1293: $font.$field.'</font>: '.$ENV{'form.'.$field};
1294: if ($ENV{'form.'.$field.'_related'}) {
1295: my @Words =
1296: &Apache::loncommon::get_related_words
1297: ($ENV{'form.'.$field});
1298: if (@Words) {
1299: $pretty_search_string.= ' with related words: '.
1300: join(', ',@Words[0..4]);
1301: } else {
1302: $pretty_search_string.= ' with related words.';
1303: }
1304: }
1305: $pretty_search_string .= '<br />';
1306: push (@queries,$SQLQuery);
1307: }
1308: }
1309: #
1310: # Make the 'mime' from 'form.category' and 'form.extension'
1311: #
1312: my $searchphrase;
1313: if (exists($ENV{'form.category'}) &&
1314: $ENV{'form.category'} !~ /^\s*$/ &&
1315: $ENV{'form.category'} ne 'any') {
1316: my @extensions = &Apache::loncommon::filecategorytypes
1317: ($ENV{'form.category'});
1318: if (scalar(@extensions) > 0) {
1319: $searchphrase = join(' OR ',@extensions);
1320: }
1321: }
1322: if (defined($searchphrase)) {
1323: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1324: push @queries,$SQLsearch;
1325: $pretty_search_string .=$font.'mime</font> contains <b>'.
1326: $searchphrase.'</b><br />';
1327: }
1328: #
1329: # Evaluate option lists
1330: if ($ENV{'form.lowestgradelevel'} &&
1331: $ENV{'form.lowestgradelevel'} ne '0' &&
1332: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1333: push(@queries,
1334: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1335: $pretty_search_string.="lowestgradelevel>=".
1336: $ENV{'form.lowestgradelevel'}."<br />\n";
1337: }
1338: if ($ENV{'form.highestgradelevel'} &&
1339: $ENV{'form.highestgradelevel'} ne '0' &&
1340: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1341: push(@queries,
1342: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1343: $pretty_search_string.="highestgradelevel<=".
1344: $ENV{'form.highestgradelevel'}."<br />\n";
1345: }
1346: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1347: push @queries,"(language like \"$ENV{'form.language'}\")";
1348: $pretty_search_string.=$font."language</font>= ".
1349: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1350: "<br />\n";
1351: }
1352: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1353: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1354: $pretty_search_string.=$font."copyright</font> = ".
1355: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1356: "<br />\n";
1357: }
1358: #
1359: # Statistics
1360: foreach my $field (@StatsFields,@EvalFields) {
1361: my ($min,$max);
1362: if (exists($ENV{'form.'.$field.'_min'}) &&
1363: $ENV{'form.'.$field.'_min'} ne '') {
1364: $min = $ENV{'form.'.$field.'_min'};
1365: }
1366: if (exists($ENV{'form.'.$field.'_max'}) &&
1367: $ENV{'form.'.$field.'_max'} ne '') {
1368: $max = $ENV{'form.'.$field.'_max'};
1369: }
1370: next if (! defined($max) && ! defined($min));
1371: if (defined($min) && defined($max)) {
1372: ($min,$max) = sort {$a <=>$b} ($min,$max);
1373: }
1374: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1375: push(@queries,'('.$field.'>'.$min.')');
1376: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1377: }
1378: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1379: push(@queries,'('.$field.'<'.$max.')');
1380: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1381: }
1382: }
1383: #
1384: # Evaluate date windows
1385: my $cafter =
1386: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1387: my $cbefore =
1388: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1389: if ($cafter > $cbefore) {
1390: my $tmp = $cafter;
1391: $cafter = $cbefore;
1392: $cbefore = $tmp;
1393: }
1394: my $mafter =
1395: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1396: my $mbefore =
1397: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1398: if ($mafter > $mbefore) {
1399: my $tmp = $mafter;
1400: $mafter = $mbefore;
1401: $mbefore = $tmp;
1402: }
1403: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1404: $mafter,$mbefore);
1405: if (defined($error)) {
1406: &output_date_error($r,$error,$closebutton,$hidden_fields);
1407: } elsif (defined($datequery)) {
1408: # Here is where you would set up pretty_search_string to output
1409: # date query information.
1410: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1411: push @queries,$datequery;
1412: }
1413: #
1414: # Process form information for custom metadata querying
1415: my $customquery=undef;
1416: ##
1417: ## The custom metadata search was removed q long time ago mostly
1418: ## because I was unable to figureout exactly how it worked and could
1419: ## not imagine people actually using it. MH
1420: ##
1421: # if ($ENV{'form.custommetadata'}) {
1422: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1423: # $ENV{'form.custommetadata'}."</b><br />\n";
1424: # $customquery=&build_custommetadata_query('custommetadata',
1425: # $ENV{'form.custommetadata'});
1426: # }
1427: my $customshow=undef;
1428: # if ($ENV{'form.customshow'}) {
1429: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1430: # $ENV{'form.customshow'}."</b><br />\n";
1431: # $customshow=$ENV{'form.customshow'};
1432: # $customshow=~s/[^\w\s]//g;
1433: # my @fields=split(/\s+/,$customshow);
1434: # $customshow=join(" ",@fields);
1435: # }
1436: ##
1437: ## Deal with restrictions to given domains
1438: ##
1439: my ($libraries_to_query,$pretty_domains_string) =
1440: &parse_domain_restrictions();
1441: $pretty_search_string .= $pretty_domains_string."<br />\n";
1442: #
1443: if (@queries) {
1444: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1445: } elsif ($customquery) {
1446: $query = '';
1447: }
1448: # &Apache::lonnet::logthis('query = '.$/.$query);
1449: return ($query,$customquery,$customshow,$libraries_to_query,
1450: $pretty_search_string);
1451: }
1452:
1453: sub parse_domain_restrictions {
1454: my $libraries_to_query = undef;
1455: # $ENV{'form.domains'} can be either a scalar or an array reference.
1456: # We need an array.
1457: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1458: return (undef,'');
1459: }
1460: my @allowed_domains;
1461: if (ref($ENV{'form.domains'})) {
1462: @allowed_domains = @{$ENV{'form.domains'}};
1463: } else {
1464: @allowed_domains = ($ENV{'form.domains'});
1465: }
1466: #
1467: my %domain_hash = ();
1468: my $pretty_domains_string;
1469: foreach (@allowed_domains) {
1470: $domain_hash{$_}++;
1471: }
1472: if ($domain_hash{'any'}) {
1473: $pretty_domains_string = "In all LON-CAPA domains.";
1474: } else {
1475: if (@allowed_domains > 1) {
1476: $pretty_domains_string = "In LON-CAPA domains:";
1477: } else {
1478: $pretty_domains_string = "In LON-CAPA domain ";
1479: }
1480: foreach (sort @allowed_domains) {
1481: $pretty_domains_string .= "<b>".$_."</b> ";
1482: }
1483: foreach (keys(%Apache::lonnet::libserv)) {
1484: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1485: push @$libraries_to_query,$_;
1486: }
1487: }
1488: }
1489: return ($libraries_to_query,$pretty_domains_string);
1490: }
1491:
1492: ######################################################################
1493: ######################################################################
1494:
1495: =pod
1496:
1497: =item &parse_basic_search()
1498:
1499: Parse the basic search form and return a scalar containing an sql query.
1500:
1501: =cut
1502:
1503: ######################################################################
1504: ######################################################################
1505: sub parse_basic_search {
1506: my ($r,$closebutton)=@_;
1507: #
1508: # Clean up fields for safety
1509: for my $field ('basicexp') {
1510: $ENV{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-]//g;
1511: }
1512: foreach ('mode','form','element') {
1513: # is this required? Hmmm.
1514: next unless (exists($ENV{"form.$_"}));
1515: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1516: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1517: }
1518: my ($libraries_to_query,$pretty_domains_string) =
1519: &parse_domain_restrictions();
1520: #
1521: # Check to see if enough of a query is filled in
1522: my $search_string = $ENV{'form.basicexp'};
1523: if (! &filled($search_string)) {
1524: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1525: return OK;
1526: }
1527: my $pretty_search_string=$search_string;
1528: my @Queries;
1529: my $searchfield = 'concat_ws(" ",'.join(',',
1530: ('title','author','subject',
1531: 'notes','abstract','keywords')
1532: ).')';
1533: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1534: $ENV{'form.related'},
1535: $searchfield);
1536: if ($error) {
1537: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1538: '','basicexp');
1539: return;
1540: }
1541: push(@Queries,$SQLQuery);
1542: #foreach my $q (@Queries) {
1543: # &Apache::lonnet::logthis(' '.$q);
1544: #}
1545: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1546: #
1547: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1548: $pretty_search_string .= ' '.$pretty_domains_string;
1549: }
1550: $pretty_search_string .= "<br />\n";
1551: $pretty_search_string =~ s:^<br /> and ::;
1552: # &Apache::lonnet::logthis($final_query);
1553: return ($final_query,$pretty_search_string,
1554: $libraries_to_query);
1555: }
1556:
1557:
1558: ###############################################################
1559: ###############################################################
1560:
1561: my @Phrases;
1562:
1563: sub concat {
1564: my ($item) = @_;
1565: my $results = '';
1566: foreach (@$item) {
1567: if (ref($_) eq 'ARRAY') {
1568: $results .= join(' ',@$_);
1569: }
1570: }
1571: return $results;
1572: }
1573:
1574: sub process_phrase_input {
1575: my ($phrase,$related,$field)=@_;
1576: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1577: my $grammar = <<'ENDGRAMMAR';
1578: searchphrase:
1579: expression /^\Z/ {
1580: # &Apache::lonsearchcat::print_item(\@item,0);
1581: [@item];
1582: }
1583: expression:
1584: phrase(s) {
1585: [@item];
1586: }
1587: phrase:
1588: orword {
1589: [@item];
1590: }
1591: | andword {
1592: [@item];
1593: }
1594: | minusword {
1595: unshift(@::Phrases,$item[1]->[0]);
1596: unshift(@::Phrases,$item[1]->[1]);
1597: [@item];
1598: }
1599: | word {
1600: unshift(@::Phrases,$item[1]);
1601: [@item];
1602: }
1603: #
1604: orword:
1605: word 'OR' phrase {
1606: unshift(@::Phrases,'OR');
1607: unshift(@::Phrases,$item[1]);
1608: [@item];
1609: }
1610: | word 'or' phrase {
1611: unshift(@::Phrases,'OR');
1612: unshift(@::Phrases,$item[1]);
1613: [@item];
1614: }
1615: | minusword 'OR' phrase {
1616: unshift(@::Phrases,'OR');
1617: unshift(@::Phrases,$item[1]->[0]);
1618: unshift(@::Phrases,$item[1]->[1]);
1619: [@item];
1620: }
1621: | minusword 'or' phrase {
1622: unshift(@::Phrases,'OR');
1623: unshift(@::Phrases,$item[1]->[0]);
1624: unshift(@::Phrases,$item[1]->[1]);
1625: [@item];
1626: }
1627: andword:
1628: word phrase {
1629: unshift(@::Phrases,'AND');
1630: unshift(@::Phrases,$item[1]);
1631: [@item];
1632: }
1633: | minusword phrase {
1634: unshift(@::Phrases,'AND');
1635: unshift(@::Phrases,$item[1]->[0]);
1636: unshift(@::Phrases,$item[1]->[1]);
1637: [@item];
1638: }
1639: #
1640: minusword:
1641: '-' word {
1642: [$item[2],'NOT'];
1643: }
1644: word:
1645: "'" term(s) "'" {
1646: &Apache::lonsearchcat::concat(\@item);
1647: }
1648: | '"' term(s) '"' {
1649: &Apache::lonsearchcat::concat(\@item);
1650: }
1651: | term {
1652: $item[1];
1653: }
1654: term:
1655: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E]+/ {
1656: $item[1];
1657: }
1658: ENDGRAMMAR
1659: #
1660: # The end result of parsing the phrase with the grammar is an array
1661: # @::Phrases.
1662: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1663: # $phrase = "genetic engineering" -dna ->
1664: # "genetic engineering","AND","NOT","dna"
1665: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1666: undef(@::Phrases);
1667: my $p = new Parse::RecDescent($grammar);
1668: if (! defined($p->searchphrase($phrase))) {
1669: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1670: return 'Unable to process phrase '.$phrase;
1671: }
1672: #
1673: # Go through the phrases and make sense of them.
1674: # Apply modifiers NOT OR and AND to the phrases.
1675: my @NewPhrases;
1676: while(@::Phrases) {
1677: my $phrase = shift(@::Phrases);
1678: # &Apache::lonnet::logthis('phrase = '.$phrase);
1679: my $phrasedata;
1680: if ($phrase =~ /^(NOT|OR|AND)$/) {
1681: if ($phrase eq 'OR') {
1682: $phrasedata->{'or'}++;
1683: if (! @::Phrases) { $phrasedata = undef; last; }
1684: $phrase = shift(@::Phrases);
1685: } elsif ($phrase eq 'AND') {
1686: $phrasedata->{'and'}++;
1687: if (! @::Phrases) { $phrasedata = undef; last; }
1688: $phrase = shift(@::Phrases);
1689: }
1690: if ($phrase eq 'NOT') {
1691: $phrasedata->{'negate'}++;
1692: if (! @::Phrases) { $phrasedata = undef; last; }
1693: $phrase = shift(@::Phrases);
1694: }
1695: }
1696: $phrasedata->{'phrase'} = $phrase;
1697: if ($related) {
1698: my @NewWords;
1699: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1700: $phrasedata->{'related_words'} = \@NewWords;
1701: }
1702: push(@NewPhrases,$phrasedata);
1703: }
1704: #
1705: # Actually build the sql query from the phrases
1706: my $SQLQuery;
1707: foreach my $phrase (@NewPhrases) {
1708: my $query;
1709: if ($phrase->{'negate'}) {
1710: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1711: } else {
1712: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1713: }
1714: foreach my $related (@{$phrase->{'related_words'}}) {
1715: if ($phrase->{'negate'}) {
1716: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1717: } else {
1718: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1719: }
1720: }
1721: if ($SQLQuery) {
1722: if ($phrase->{'or'}) {
1723: $SQLQuery .= ' OR ('.$query.')';
1724: } else {
1725: $SQLQuery .= ' AND ('.$query.')';
1726: }
1727: } else {
1728: $SQLQuery = '('.$query.')';
1729: }
1730: }
1731: #
1732: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1733: #
1734: return undef,$SQLQuery;
1735: }
1736:
1737: ######################################################################
1738: ######################################################################
1739:
1740: =pod
1741:
1742: =item &related_version()
1743:
1744: Modifies an input string to include related words. Words in the string
1745: are replaced with parenthesized lists of 'OR'd words. For example
1746: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1747:
1748: Note: Using this twice on a string is probably silly.
1749:
1750: =cut
1751:
1752: ######################################################################
1753: ######################################################################
1754: sub related_version {
1755: my ($word) = @_;
1756: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1757: my @Words = &Apache::loncommon::get_related_words($word);
1758: # Only use 4 related words
1759: @Words = ($#Words>4? @Words[0..4] : @Words);
1760: my $result = join " OR ", ($word,@Words);
1761: return $result,sort(@Words);
1762: }
1763:
1764:
1765: ######################################################################
1766: ######################################################################
1767:
1768: =pod
1769:
1770: =item &build_custommetadata_query()
1771:
1772: Constructs a custom metadata query using a rather heinous regular
1773: expression.
1774:
1775: =cut
1776:
1777: ######################################################################
1778: ######################################################################
1779: sub build_custommetadata_query {
1780: my ($field_name,$logic_statement)=@_;
1781: my $q=new Text::Query('abc',
1782: -parse => 'Text::Query::ParseAdvanced',
1783: -build => 'Text::Query::BuildAdvancedString');
1784: $q->prepare($logic_statement);
1785: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1786: # quick fix to change literal into xml tag-matching
1787: # will eventually have to write a separate builder module
1788: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1789: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1790: /\\<$1\\>?# \<wordone\>
1791: \[\^\\<\]?# [^\<]
1792: \*$2\[\^\\<\]?# *wordtwo[^\<]
1793: \*\\<\\\/$1\\>?# *\<\/wordone\>
1794: /g;
1795: return $matchexp;
1796: }
1797:
1798:
1799: ######################################################################
1800: ######################################################################
1801:
1802: =pod
1803:
1804: =item &build_date_queries()
1805:
1806: Builds a SQL logic query to check time/date entries.
1807: Also reports errors (check for /^Incorrect/).
1808:
1809: =cut
1810:
1811: ######################################################################
1812: ######################################################################
1813: sub build_date_queries {
1814: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1815: my ($result,$error,$pretty_string);
1816: #
1817: # Verify the input
1818: if (! defined($cafter) && ! defined($cbefore) &&
1819: ! defined($mafter) && ! defined($mbefore)) {
1820: # This is an okay situation, so return undef for the error
1821: return (undef,undef,undef);
1822: }
1823: if ((defined($cafter) && ! defined($cbefore)) ||
1824: (defined($cbefore) && ! defined($cafter))) {
1825: # This is bad, so let them know
1826: $error = &mt('Incorrect entry for the creation date. '.
1827: 'You must specify both the beginning and ending dates.');
1828: }
1829: if (! defined($error) &&
1830: ((defined($mafter) && ! defined($mbefore)) ||
1831: (defined($mbefore) && ! defined($mafter)))) {
1832: # This is also bad, so let them know
1833: $error = &mt('Incorrect entry for the last revision date. '.
1834: 'You must specify both the beginning and ending dates.');
1835: }
1836: if (! defined($error)) {
1837: #
1838: # Build the queries
1839: my @queries;
1840: if (defined($cbefore) && defined($cafter)) {
1841: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1842: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1843: # Correct for year being relative to 1900
1844: $cayear+=1900; $cbyear+=1900;
1845: my $cquery=
1846: '(creationdate BETWEEN '.
1847: "'".$cayear.'-'.$camon.'-'.$caday."'".
1848: ' AND '.
1849: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1850: $pretty_string .= '<br />' if (defined($pretty_string));
1851: $pretty_string .=
1852: &mt('created between [_1] and [_2]',
1853: &Apache::lonlocal::locallocaltime($cafter),
1854: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1855: push(@queries,$cquery);
1856: $pretty_string =~ s/ 00:00:00//g;
1857: }
1858: if (defined($mbefore) && defined($mafter)) {
1859: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1860: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1861: # Correct for year being relative to 1900
1862: $mayear+=1900; $mbyear+=1900;
1863: my $mquery=
1864: '(lastrevisiondate BETWEEN '.
1865: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1866: ' AND '.
1867: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1868: push(@queries,$mquery);
1869: $pretty_string .= '<br />' if (defined($pretty_string));
1870: $pretty_string .=
1871: &mt('last revised between [_1] and [_2]',
1872: &Apache::lonlocal::locallocaltime($mafter),
1873: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1874: $pretty_string =~ s/ 00:00:00//g;
1875: }
1876: if (@queries) {
1877: $result .= join(" AND ",@queries);
1878: }
1879: }
1880: return ($result,$error,$pretty_string);
1881: }
1882:
1883: ######################################################################
1884: ######################################################################
1885:
1886: =pod
1887:
1888: =item ©right_check()
1889:
1890: Inputs: $Metadata, a hash pointer of metadata for a resource.
1891:
1892: Returns: 1 if the resource is available to the user making the query,
1893: 0 otherwise.
1894:
1895: =cut
1896:
1897: ######################################################################
1898: ######################################################################
1899: sub copyright_check {
1900: my $Metadata = shift;
1901: # Check copyright tags and skip results the user cannot use
1902: my (undef,undef,$resdom,$resname) = split('/',
1903: $Metadata->{'url'});
1904: # Check for priv
1905: if (($Metadata->{'copyright'} eq 'priv') &&
1906: (($ENV{'user.name'} ne $resname) &&
1907: ($ENV{'user.domain'} ne $resdom))) {
1908: return 0;
1909: }
1910: # Check for domain
1911: if (($Metadata->{'copyright'} eq 'domain') &&
1912: ($ENV{'user.domain'} ne $resdom)) {
1913: return 0;
1914: }
1915: return 1;
1916: }
1917:
1918: ######################################################################
1919: ######################################################################
1920:
1921: =pod
1922:
1923: =item &ensure_db_and_table()
1924:
1925: Ensure we can get lonmysql to connect to the database and the table we
1926: need exists.
1927:
1928: Inputs: $r, table id
1929:
1930: Returns: undef on error, 1 if the table exists.
1931:
1932: =cut
1933:
1934: ######################################################################
1935: ######################################################################
1936: sub ensure_db_and_table {
1937: my ($r,$table) = @_;
1938: ##
1939: ## Sanity check the table id.
1940: ##
1941: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1942: $r->print("Unable to retrieve search results. ".
1943: "Unable to determine the table results were stored in. ".
1944: "</body></html>");
1945: return undef;
1946: }
1947: ##
1948: ## Make sure we can connect and the table exists.
1949: ##
1950: my $connection_result = &Apache::lonmysql::connect_to_db();
1951: if (!defined($connection_result)) {
1952: $r->print("Unable to connect to the MySQL database where your results".
1953: " are stored. </body></html>");
1954: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1955: " connect to database.");
1956: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1957: return undef;
1958: }
1959: my $table_check = &Apache::lonmysql::check_table($table);
1960: if (! defined($table_check)) {
1961: $r->print("A MySQL error has occurred.</form></body></html>");
1962: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1963: " of table ".$table);
1964: return undef;
1965: } elsif (! $table_check) {
1966: $r->print("The table of results could not be found.");
1967: &Apache::lonnet::logthis("The user requested a table, ".$table.
1968: ", that could not be found.");
1969: return undef;
1970: }
1971: return 1;
1972: }
1973:
1974: ######################################################################
1975: ######################################################################
1976:
1977: =pod
1978:
1979: =item &print_sort_form()
1980:
1981: The sort feature is not implemented at this time. This form just prints
1982: a link to change the search query.
1983:
1984: =cut
1985:
1986: ######################################################################
1987: ######################################################################
1988: sub print_sort_form {
1989: my ($r,$pretty_query_string) = @_;
1990: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1).
1991: &Apache::lonhtmlcommon::breadcrumbs
1992: (undef,'Searching','Searching',undef,undef,
1993: $ENV{'form.catalogmode'} ne 'groupsearch');
1994:
1995: ##
1996: my %SortableFields=&Apache::lonlocal::texthash(
1997: id => 'Default',
1998: title => 'Title',
1999: author => 'Author',
2000: subject => 'Subject',
2001: url => 'URL',
2002: version => 'Version Number',
2003: mime => 'Mime type',
2004: lang => 'Language',
2005: owner => 'Owner/Publisher',
2006: copyright => 'Copyright',
2007: hostname => 'Host',
2008: creationdate => 'Creation Date',
2009: lastrevisiondate => 'Revision Date'
2010: );
2011: ##
2012: my $table = $ENV{'form.table'};
2013: return if (! &ensure_db_and_table($r,$table));
2014: ##
2015: ## Get the number of results
2016: ##
2017: my $total_results = &Apache::lonmysql::number_of_rows($table);
2018: if (! defined($total_results)) {
2019: $r->print("A MySQL error has occurred.</form></body></html>");
2020: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2021: " of rows in table ".$table);
2022: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2023: return;
2024: }
2025: my $result;
2026: $result.=<<END;
2027: <html>
2028: <head>
2029: <script>
2030: function change_sort() {
2031: var newloc = "/adm/searchcat?phase=results";
2032: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
2033: newloc += "&sortby=";
2034: newloc += document.forms.statusform.elements.sortby.value;
2035: parent.resultsframe.location= newloc;
2036: }
2037: </script>
2038: <title>Results</title>
2039: </head>
2040: $bodytag
2041: <form name="statusform" action="" method="post">
2042: <input type="hidden" name="Queue" value="" />
2043: END
2044:
2045: #<h2>Sort Results</h2>
2046: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2047: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
2048: # foreach (keys(%SortableFields)) {
2049: # $result.="<option name=\"$_\"";
2050: # if ($_ eq $ENV{'form.sortby'}) {
2051: # $result.=" selected ";
2052: # }
2053: # $result.=" >$SortableFields{$_}</option>\n";
2054: # }
2055: # $result.="</select>\n";
2056: my $revise = &revise_button();
2057: $result.=<<END;
2058: <p>
2059: There are $total_results matches to your query. $revise
2060: </p><p>
2061: Search:$pretty_query_string
2062: </p>
2063: </form>
2064: </body>
2065: </html>
2066: END
2067: $r->print($result);
2068: return;
2069: }
2070:
2071: #####################################################################
2072: #####################################################################
2073:
2074: =pod
2075:
2076: =item MySQL Table Description
2077:
2078: MySQL table creation requires a precise description of the data to be
2079: stored. The use of the correct types to hold data is vital to efficient
2080: storage and quick retrieval of records. The columns must be described in
2081: the following format:
2082:
2083: =cut
2084:
2085: #####################################################################
2086: #####################################################################
2087: #
2088: # These should probably be scoped but I don't have time right now...
2089: #
2090: my @Datatypes;
2091: my @Fullindicies;
2092:
2093: ######################################################################
2094: ######################################################################
2095:
2096: =pod
2097:
2098: =item &create_results_table()
2099:
2100: Creates the table of search results by calling lonmysql. Stores the
2101: table id in $ENV{'form.table'}
2102:
2103: Inputs: none.
2104:
2105: Returns: the identifier of the table on success, undef on error.
2106:
2107: =cut
2108:
2109: ######################################################################
2110: ######################################################################
2111: sub set_up_table_structure {
2112: my ($datatypes,$fullindicies) =
2113: &LONCAPA::lonmetadata::describe_metadata_storage();
2114: # Copy the table description before modifying it...
2115: @Datatypes = @{$datatypes};
2116: unshift(@Datatypes,{name => 'id',
2117: type => 'MEDIUMINT',
2118: restrictions => 'UNSIGNED NOT NULL',
2119: primary_key => 'yes',
2120: auto_inc => 'yes' });
2121: @Fullindicies = @{$fullindicies};
2122: return;
2123: }
2124:
2125: sub create_results_table {
2126: &set_up_table_structure();
2127: my $table = &Apache::lonmysql::create_table
2128: ( { columns => \@Datatypes,
2129: FULLTEXT => [{'columns' => \@Fullindicies},],
2130: } );
2131: if (defined($table)) {
2132: $ENV{'form.table'} = $table;
2133: return $table;
2134: }
2135: return undef; # Error...
2136: }
2137:
2138: ######################################################################
2139: ######################################################################
2140:
2141: =pod
2142:
2143: =item Search Status update functions
2144:
2145: Each of the following functions changes the values of one of the
2146: input fields used to display the search status to the user. The names
2147: should be explanatory.
2148:
2149: Inputs: Apache request handler ($r), text to display.
2150:
2151: Returns: Nothing.
2152:
2153: =over 4
2154:
2155: =item &update_count_status()
2156:
2157: =item &update_status()
2158:
2159: =item &update_seconds()
2160:
2161: =back
2162:
2163: =cut
2164:
2165: ######################################################################
2166: ######################################################################
2167: sub update_count_status {
2168: my ($r,$text) = @_;
2169: $text =~ s/\'/\\\'/g;
2170: $r->print
2171: ("<script>document.statusform.count.value = ' $text'</script>\n");
2172: $r->rflush();
2173: }
2174:
2175: sub update_status {
2176: my ($r,$text) = @_;
2177: $text =~ s/\'/\\\'/g;
2178: $r->print
2179: ("<script>document.statusform.status.value = ' $text'</script>\n");
2180: $r->rflush();
2181: }
2182:
2183: {
2184: my $max_time = 40; # seconds for the search to complete
2185: my $start_time = 0;
2186: my $last_time = 0;
2187:
2188: sub reset_timing {
2189: $start_time = 0;
2190: $last_time = 0;
2191: }
2192:
2193: sub time_left {
2194: if ($start_time == 0) {
2195: $start_time = time;
2196: }
2197: my $time_left = $max_time - (time - $start_time);
2198: $time_left = 0 if ($time_left < 0);
2199: return $time_left;
2200: }
2201:
2202: sub update_seconds {
2203: my ($r) = @_;
2204: my $time = &time_left();
2205: if (($last_time-$time) > 0) {
2206: $r->print("<script>".
2207: "document.statusform.seconds.value = '$time'".
2208: "</script>\n");
2209: $r->rflush();
2210: }
2211: $last_time = $time;
2212: }
2213:
2214: }
2215:
2216: ######################################################################
2217: ######################################################################
2218:
2219: =pod
2220:
2221: =item &revise_button()
2222:
2223: Inputs: None
2224:
2225: Returns: html string for a 'revise search' button.
2226:
2227: =cut
2228:
2229: ######################################################################
2230: ######################################################################
2231: sub revise_button {
2232: my $revise_phase = 'disp_basic';
2233: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2234: my $newloc = '/adm/searchcat'.
2235: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2236: '&cleargroupsort=1'.
2237: '&phase='.$revise_phase;
2238: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2239: qq{ onClick="parent.location='$newloc';" /> };
2240: return $result;
2241: }
2242:
2243: ######################################################################
2244: ######################################################################
2245:
2246: =pod
2247:
2248: =item &run_search()
2249:
2250: Executes a search query by sending it the the other servers and putting the
2251: results into MySQL.
2252:
2253: =cut
2254:
2255: ######################################################################
2256: ######################################################################
2257: sub run_search {
2258: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2259: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2260: $bodytag.=&Apache::lonhtmlcommon::breadcrumbs
2261: (undef,'Searching','Searching',undef,undef,
2262: $ENV{'form.catalogmode'} ne 'groupsearch');
2263: my $connection = $r->connection;
2264: #
2265: # Print run_search header
2266: #
2267: $r->print(<<END);
2268: <html>
2269: <head><title>Search Status</title></head>
2270: $bodytag
2271: <form name="statusform" action="" method="post">
2272: <input type="hidden" name="Queue" value="" />
2273: END
2274: # Remove leading and trailing <br />
2275: $pretty_string =~ s:^\s*<br />::i;
2276: $pretty_string =~ s:(<br />)*\s*$::im;
2277: my @Lines = split("<br />",$pretty_string);
2278: # I keep getting blank items at the end of the list, hence the following:
2279: while ($Lines[-1] =~ /^\s*$/ && @Lines) {
2280: pop(@Lines);
2281: }
2282: if (@Lines > 2) {
2283: $pretty_string = join '<br />',(@Lines[0..2],'....<br />');
2284: }
2285: $r->print(&mt("Search: [_1]",$pretty_string));
2286: $r->rflush();
2287: #
2288: # Determine the servers we need to contact.
2289: my @Servers_to_contact;
2290: if (defined($serverlist)) {
2291: if (ref($serverlist) eq 'ARRAY') {
2292: @Servers_to_contact = @$serverlist;
2293: } else {
2294: @Servers_to_contact = ($serverlist);
2295: }
2296: } else {
2297: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2298: }
2299: my %Server_status;
2300: #
2301: # Check on the mysql table we will use to store results.
2302: my $table =$ENV{'form.table'};
2303: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2304: $r->print("Unable to determine table id to store search results in.".
2305: "The search has been aborted.</body></html>");
2306: return;
2307: }
2308: my $table_status = &Apache::lonmysql::check_table($table);
2309: if (! defined($table_status)) {
2310: $r->print("Unable to determine status of table.</body></html>");
2311: &Apache::lonnet::logthis("Bogus table id of $table for ".
2312: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2313: &Apache::lonnet::logthis("lonmysql error = ".
2314: &Apache::lonmysql::get_error());
2315: return;
2316: }
2317: if (! $table_status) {
2318: &Apache::lonnet::logthis("lonmysql error = ".
2319: &Apache::lonmysql::get_error());
2320: &Apache::lonnet::logthis("lonmysql debug = ".
2321: &Apache::lonmysql::get_debug());
2322: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2323: $r->print("The table id,$table, we tried to use is invalid.".
2324: "The search has been aborted.</body></html>");
2325: return;
2326: }
2327: ##
2328: ## Prepare for the big loop.
2329: my $hitcountsum;
2330: my $server;
2331: my $status;
2332: my $revise = &revise_button();
2333: $r->print(<<END);
2334: <table>
2335: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2336: <tr>
2337: <td><input type="text" name="status" value="" size="30" /></td>
2338: <td><input type="text" name="count" value="" size="10" /></td>
2339: <td><input type="text" name="seconds" value="" size="8" /></td>
2340: <td>$revise</td>
2341: </tr>
2342: </table>
2343: </form>
2344: END
2345: $r->rflush();
2346: &reset_timing();
2347: &update_seconds($r);
2348: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2349: while (&time_left() &&
2350: ((@Servers_to_contact) || keys(%Server_status))) {
2351: &update_seconds($r);
2352: #
2353: # Send out a search request
2354: if (@Servers_to_contact) {
2355: # Contact one server
2356: my $server = shift(@Servers_to_contact);
2357: &update_status($r,&mt('contacting [_1]',$server));
2358: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2359: $customshow,[$server]);
2360: ($server) = keys(%$reply);
2361: $Server_status{$server} = $reply->{$server};
2362: } else {
2363: # wait a sec. to give time for files to be written
2364: # This sleep statement is here instead of outside the else
2365: # block because we do not want to pause if we have servers
2366: # left to contact.
2367: if (scalar (keys(%Server_status))) {
2368: &update_status($r,
2369: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2370: }
2371: sleep(1);
2372: }
2373: #
2374: # Loop through the servers we have contacted but do not
2375: # have results from yet, looking for results.
2376: foreach my $server (keys(%Server_status)) {
2377: last if ($connection->aborted());
2378: &update_seconds($r);
2379: my $status = $Server_status{$server};
2380: if ($status eq 'con_lost') {
2381: delete ($Server_status{$server});
2382: next;
2383: }
2384: $status=~/^([\.\w]+)$/;
2385: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2386: if (-e $datafile && ! -e "$datafile.end") {
2387: &update_status($r,&mt('Receiving results from [_1]',$server));
2388: next;
2389: }
2390: last if ($connection->aborted());
2391: if (-e "$datafile.end") {
2392: &update_status($r,&mt('Reading results from [_1]',$server));
2393: if (-z "$datafile") {
2394: delete($Server_status{$server});
2395: next;
2396: }
2397: my $fh;
2398: if (!($fh=Apache::File->new($datafile))) {
2399: $r->print("Unable to open search results file for ".
2400: "server $server. Omitting from search");
2401: delete($Server_status{$server});
2402: next;
2403: }
2404: # Read in the whole file.
2405: while (my $result = <$fh>) {
2406: last if ($connection->aborted());
2407: #
2408: # Records are stored one per line
2409: chomp($result);
2410: next if (! $result);
2411: #
2412: # Parse the result.
2413: my %Fields = &parse_raw_result($result,$server);
2414: $Fields{'hostname'} = $server;
2415: #
2416: # Skip based on copyright
2417: next if (! ©right_check(\%Fields));
2418: #
2419: # Store the result in the mysql database
2420: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2421: if (! defined($result)) {
2422: $r->print(&Apache::lonmysql::get_error());
2423: }
2424: #
2425: $hitcountsum ++;
2426: &update_seconds($r);
2427: if ($hitcountsum % 50 == 0) {
2428: &update_count_status($r,$hitcountsum);
2429: }
2430: }
2431: $fh->close();
2432: # $server is only deleted if the results file has been
2433: # found and (successfully) opened. This may be a bad idea.
2434: delete($Server_status{$server});
2435: }
2436: last if ($connection->aborted());
2437: &update_count_status($r,$hitcountsum);
2438: }
2439: last if ($connection->aborted());
2440: &update_seconds($r);
2441: }
2442: &update_status($r,&mt('Search Complete [_1]',$server));
2443: &update_seconds($r);
2444: #
2445: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2446: #
2447: # We have run out of time or run out of servers to talk to and
2448: # results to get, so let the client know the top frame needs to be
2449: # loaded from /adm/searchcat
2450: $r->print("</body></html>");
2451: # if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2452: $r->print("<script>".
2453: "window.location='/adm/searchcat?".
2454: "phase=sort&".
2455: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2456: "</script>");
2457: # }
2458: return;
2459: }
2460:
2461: ######################################################################
2462: ######################################################################
2463:
2464: =pod
2465:
2466: =item &prev_next_buttons()
2467:
2468: Returns html for the previous and next buttons on the search results page.
2469:
2470: =cut
2471:
2472: ######################################################################
2473: ######################################################################
2474: sub prev_next_buttons {
2475: my ($current_min,$show,$total,$parms) = @_;
2476: return '' if ($show eq 'all'); # No links if you get them all at once.
2477: #
2478: # Create buttons
2479: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2480: $buttons .= '/>';
2481: $buttons .= ' 'x3;
2482: $buttons .= '<input type="submit" name="reload" '.
2483: 'value="'.&mt('Reload').'" />';
2484: $buttons .= ' 'x3;
2485: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2486: $buttons .= '/>';
2487: return $buttons;
2488: }
2489:
2490: ######################################################################
2491: ######################################################################
2492:
2493: =pod
2494:
2495: =item &display_results()
2496:
2497: Prints the results out for selection and perusal.
2498:
2499: =cut
2500:
2501: ######################################################################
2502: ######################################################################
2503: sub display_results {
2504: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2505: my $connection = $r->connection;
2506: $r->print(&search_results_header($importbutton,$closebutton));
2507: ##
2508: ## Set viewing function
2509: ##
2510: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2511: if (!defined($viewfunction)) {
2512: $r->print("Internal Error - Bad view selected.\n");
2513: $r->rflush();
2514: return;
2515: }
2516: ##
2517: ## $checkbox_num is a count of the number of checkboxes output on the
2518: ## page this is used only during catalogmode=groupsearch.
2519: my $checkbox_num = 0;
2520: ##
2521: ## Get the catalog controls setup
2522: ##
2523: my $action = "/adm/searchcat?phase=results";
2524: ##
2525: ## Deal with groupsearch by opening the groupsearch db file.
2526: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2527: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2528: &GDBM_WRCREAT(),0640)) {
2529: $r->print('Unable to store import results.</form></body></html>');
2530: $r->rflush();
2531: return;
2532: }
2533: }
2534: ##
2535: ## Prepare the table for querying
2536: my $table = $ENV{'form.table'};
2537: return if (! &ensure_db_and_table($r,$table));
2538: ##
2539: ## Get the number of results
2540: my $total_results = &Apache::lonmysql::number_of_rows($table);
2541: if (! defined($total_results)) {
2542: $r->print("A MySQL error has occurred.</form></body></html>");
2543: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2544: " of rows in table ".$table);
2545: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2546: return;
2547: }
2548: ##
2549: ## Determine how many results we need to get
2550: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2551: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
2552: if (exists($ENV{'form.prev'})) {
2553: $ENV{'form.start'} -= $ENV{'form.show'};
2554: } elsif (exists($ENV{'form.next'})) {
2555: $ENV{'form.start'} += $ENV{'form.show'};
2556: }
2557: $ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
2558: $ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
2559: my $min = $ENV{'form.start'};
2560: my $max;
2561: if ($ENV{'form.show'} eq 'all') {
2562: $max = $total_results ;
2563: } else {
2564: $max = $min + $ENV{'form.show'} - 1;
2565: $max = $total_results if ($max > $total_results);
2566: }
2567: ##
2568: ## Output form elements
2569: $r->print(&hidden_field('table').
2570: &hidden_field('phase').
2571: &hidden_field('persistent_db_id').
2572: &hidden_field('start')
2573: );
2574: ##
2575: ## Output links (if necessary) for 'prev' and 'next' pages.
2576: $r->print
2577: ('<table width="100%"><tr><td width="50%" align="right">'.
2578: &prev_next_buttons($min,$ENV{'form.show'},$total_results).
2579: '</td><td align="right">'.
2580: &viewoptions().'</td></tr></table>'
2581: );
2582: if ($total_results == 0) {
2583: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2584: '<h3>'.&mt('There are currently no results').'.</h3>'.
2585: "</form></body></html>");
2586: return;
2587: } else {
2588: $r->print
2589: ("<center>Results $min to $max out of $total_results</center>\n");
2590: }
2591: ##
2592: ## Get results from MySQL table
2593: my @Results = &Apache::lonmysql::get_rows($table,
2594: 'id>='.$min.' AND id<='.$max);
2595: ##
2596: ## Loop through the results and output them.
2597: foreach my $row (@Results) {
2598: if ($connection->aborted()) {
2599: &cleanup();
2600: return;
2601: }
2602: my %Fields = %{&parse_row(@$row)};
2603: my $output="<p>\n";
2604: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2605: $Fields{'title'} = 'Untitled';
2606: }
2607: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2608: $Fields{'id'},$checkbox_num++);
2609: # Render the result into html
2610: $output.= &$viewfunction($prefix,%Fields);
2611: # Print them out as they come in.
2612: $r->print($output);
2613: $r->rflush();
2614: }
2615: if (@Results < 1) {
2616: $r->print(&mt("There were no results matching your query"));
2617: } else {
2618: $r->print
2619: ('<center>'.
2620: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2621: "table=".$ENV{'form.table'}.
2622: "&phase=results".
2623: "&persistent_db_id=".
2624: $ENV{'form.persistent_db_id'})
2625: ."</center>\n"
2626: );
2627: }
2628: $r->print("</form></body></html>");
2629: $r->rflush();
2630: untie %groupsearch_db if (tied(%groupsearch_db));
2631: return;
2632: }
2633:
2634: ######################################################################
2635: ######################################################################
2636:
2637: =pod
2638:
2639: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2640:
2641: Returns html needed for the various catalog modes. Gets inputs from
2642: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2643:
2644: =cut
2645:
2646: ######################################################################
2647: ######################################################################
2648: sub catalogmode_output {
2649: my $output = '';
2650: my ($title,$url,$fnum,$checkbox_num) = @_;
2651: if ($ENV{'form.catalogmode'} eq 'interactive') {
2652: $title=~ s/\'/\\\'/g;
2653: if ($ENV{'form.catalogmode'} eq 'interactive') {
2654: $output.=<<END
2655: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2656: onClick="javascript:select_data('$title','$url')">
2657: </font>
2658: END
2659: }
2660: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2661: $groupsearch_db{"pre_${fnum}_link"}=$url;
2662: $groupsearch_db{"pre_${fnum}_title"}=$title;
2663: $output.=<<END;
2664: <font size='-1'>
2665: <input type="checkbox" name="returnvalues" value="SELECT"
2666: onClick="javascript:queue($checkbox_num,$fnum)" />
2667: </font>
2668: END
2669: }
2670: return $output;
2671: }
2672: ######################################################################
2673: ######################################################################
2674:
2675: =pod
2676:
2677: =item &parse_row()
2678:
2679: Parse a row returned from the database.
2680:
2681: =cut
2682:
2683: ######################################################################
2684: ######################################################################
2685: sub parse_row {
2686: my @Row = @_;
2687: my %Fields;
2688: if (! scalar(@Datatypes)) {
2689: &set_up_table_structure();
2690: }
2691: for (my $i=0;$i<=$#Row;$i++) {
2692: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2693: }
2694: $Fields{'language'} =
2695: &Apache::loncommon::languagedescription($Fields{'language'});
2696: $Fields{'copyrighttag'} =
2697: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2698: $Fields{'mimetag'} =
2699: &Apache::loncommon::filedescription($Fields{'mime'});
2700: return \%Fields;
2701: }
2702:
2703: ###########################################################
2704: ###########################################################
2705:
2706: =pod
2707:
2708: =item &parse_raw_result()
2709:
2710: Takes a line from the file of results and parse it. Returns a hash
2711: with keys according to column labels
2712:
2713: In addition, the following tags are set by calling the appropriate
2714: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2715:
2716: The 'title' field is set to "Untitled" if the title field is blank.
2717:
2718: 'abstract' and 'keywords' are truncated to 200 characters.
2719:
2720: =cut
2721:
2722: ###########################################################
2723: ###########################################################
2724: sub parse_raw_result {
2725: my ($result,$hostname) = @_;
2726: # conclude from self to others regarding fields
2727: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2728: (map {
2729: &Apache::lonnet::unescape($_);
2730: } (split(/\,/,$result)) );
2731: return %Fields;
2732: }
2733:
2734: ###########################################################
2735: ###########################################################
2736:
2737: =pod
2738:
2739: =item &handle_custom_fields()
2740:
2741: =cut
2742:
2743: ###########################################################
2744: ###########################################################
2745: sub handle_custom_fields {
2746: my @results = @{shift()};
2747: my $customshow='';
2748: my $extrashow='';
2749: my @customfields;
2750: if ($ENV{'form.customshow'}) {
2751: $customshow=$ENV{'form.customshow'};
2752: $customshow=~s/[^\w\s]//g;
2753: my @fields=map {
2754: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2755: } split(/\s+/,$customshow);
2756: @customfields=split(/\s+/,$customshow);
2757: if ($customshow) {
2758: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2759: }
2760: }
2761: my $customdata='';
2762: my %customhash;
2763: foreach my $result (@results) {
2764: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2765: my $tmp=$result;
2766: $tmp=~s/^custom\=//;
2767: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2768: } split(/\,/,$tmp);
2769: $customhash{$k}=$v;
2770: }
2771: }
2772: return ($extrashow,\@customfields,\%customhash);
2773: }
2774:
2775: ######################################################################
2776: ######################################################################
2777:
2778: =pod
2779:
2780: =item &search_results_header()
2781:
2782: Output the proper html headers and javascript code to deal with different
2783: calling modes.
2784:
2785: Takes most inputs directly from %ENV, except $mode.
2786:
2787: =over 4
2788:
2789: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2790:
2791: =back
2792:
2793: The following environment variables are checked:
2794:
2795: =over 4
2796:
2797: =item 'form.catalogmode'
2798:
2799: Checked for 'interactive' and 'groupsearch'.
2800:
2801: =item 'form.mode'
2802:
2803: Checked for existance & 'edit' mode.
2804:
2805: =item 'form.form'
2806:
2807: Contains the name of the form that has the input fields to set
2808:
2809: =item 'form.element'
2810:
2811: the name of the input field to put the URL into
2812:
2813: =item 'form.titleelement'
2814:
2815: the name of the input field to put the title into
2816:
2817: =back
2818:
2819: =cut
2820:
2821: ######################################################################
2822: ######################################################################
2823: sub search_results_header {
2824: my ($importbutton,$closebutton) = @_;
2825: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2826: my $result = '';
2827: # output beginning of search page
2828: # conditional output of script functions dependent on the mode in
2829: # which the search was invoked
2830: if ($ENV{'form.catalogmode'} eq 'interactive'){
2831: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2832: $result.=<<SCRIPT;
2833: <script type="text/javascript">
2834: function select_data(title,url) {
2835: changeTitle(title);
2836: changeURL(url);
2837: parent.close();
2838: }
2839: function changeTitle(val) {
2840: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2841: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2842: }
2843: }
2844: function changeURL(val) {
2845: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2846: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2847: }
2848: }
2849: </script>
2850: SCRIPT
2851: } elsif ($ENV{'form.mode'} eq 'edit') {
2852: my $form = $ENV{'form.form'};
2853: my $element = $ENV{'form.element'};
2854: my $titleelement = $ENV{'form.titleelement'};
2855: my $changetitle;
2856: if (!$titleelement) {
2857: $changetitle='function changeTitle(val) {}';
2858: } else {
2859: $changetitle=<<END;
2860: function changeTitle(val) {
2861: if (parent.targetwin.document) {
2862: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2863: } else {
2864: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2865: alert("Unable to transfer data to "+url);
2866: }
2867: }
2868: END
2869: }
2870:
2871: $result.=<<SCRIPT;
2872: <script type="text/javascript">
2873: function select_data(title,url) {
2874: changeURL(url);
2875: changeTitle(title);
2876: parent.close();
2877: }
2878: $changetitle
2879: function changeURL(val) {
2880: if (parent.targetwin.document) {
2881: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2882: } else {
2883: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2884: alert("Unable to transfer data to "+url);
2885: }
2886: }
2887: </script>
2888: SCRIPT
2889: }
2890: }
2891: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2892: <script type="text/javascript">
2893: function queue(checkbox_num,val) {
2894: if (document.forms.results.returnvalues.length != "undefined" &&
2895: typeof(document.forms.results.returnvalues.length) == "number") {
2896: if (document.forms.results.returnvalues[checkbox_num].checked) {
2897: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2898: } else {
2899: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2900: }
2901: } else {
2902: if (document.forms.results.returnvalues.checked) {
2903: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2904: } else {
2905: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2906: }
2907: }
2908: }
2909: function select_group() {
2910: parent.window.location=
2911: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2912: parent.statusframe.document.forms.statusform.elements.Queue.value;
2913: }
2914: </script>
2915: SCRIPT
2916: $result.=<<END;
2917: </head>
2918: $bodytag
2919: <form name="results" method="post" action="/adm/searchcat" >
2920: <input type="hidden" name="Queue" value="" />
2921: $importbutton
2922: END
2923: return $result;
2924: }
2925:
2926: ######################################################################
2927: ######################################################################
2928: sub search_status_header {
2929: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2930: return <<ENDSTATUS;
2931: <html><head><title>Search Status</title></head>
2932: $bodytag
2933: <h3>Search Status</h3>
2934: Sending search request to LON-CAPA servers.<br />
2935: ENDSTATUS
2936: }
2937:
2938: sub results_link {
2939: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2940: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2941: my $results_link = $basic_link."&phase=results".
2942: "&pause=1"."&start=1";
2943: return $results_link;
2944: }
2945:
2946: ######################################################################
2947: ######################################################################
2948: sub print_frames_interface {
2949: my $r = shift;
2950: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2951: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2952: my $run_search_link = $basic_link."&phase=run_search";
2953: my $results_link = &results_link();
2954: my $result = <<"ENDFRAMES";
2955: <html>
2956: <head>
2957: <script>
2958: var targetwin = opener;
2959: var queue = '';
2960: </script>
2961: <title>LON-CAPA Digital Library Search Results</title>
2962: </head>
2963: <frameset rows="150,*">
2964: <frame name="statusframe" src="$run_search_link">
2965: <frame name="resultsframe" src="$results_link">
2966: </frameset>
2967: </html>
2968: ENDFRAMES
2969:
2970: $r->print($result);
2971: return;
2972: }
2973:
2974: ######################################################################
2975: ######################################################################
2976:
2977: sub has_stat_data {
2978: my ($values) = @_;
2979: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2980: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2981: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2982: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2983: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2984: return 1;
2985: }
2986: return 0;
2987: }
2988:
2989: sub statfields {
2990: return ('count','stdno','disc','avetries','difficulty');
2991: }
2992:
2993: sub has_eval_data {
2994: my ($values) = @_;
2995: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2996: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2997: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2998: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2999: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
3000: return 1;
3001: }
3002: return 0;
3003: }
3004:
3005: sub evalfields {
3006: return ('clear','technical','correct','helpful','depth');
3007: }
3008:
3009: ######################################################################
3010: ######################################################################
3011:
3012: =pod
3013:
3014: =item Metadata Viewing Functions
3015:
3016: Output is a HTML-ified string.
3017:
3018: Input arguments are title, author, subject, url, keywords, version,
3019: notes, short abstract, mime, language, creation date,
3020: last revision date, owner, copyright, hostname, and
3021: extra custom metadata to show.
3022:
3023: =over 4
3024:
3025: =item &detailed_citation_view()
3026:
3027: =cut
3028:
3029: ######################################################################
3030: ######################################################################
3031: sub detailed_citation_view {
3032: my ($prefix,%values) = @_;
3033: my $result;
3034: $result .= '<b>'.$prefix.
3035: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
3036: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
3037: 'target="search_preview">'.$values{'title'}."</a></b>\n";
3038: $result .= "<p>\n";
3039: $result .= '<b>'.$values{'author'}.'</b>,'.
3040: ' <i>'.$values{'owner'}.'</i><br />';
3041: foreach my $field
3042: (
3043: { name=>'url',
3044: translate => '<b>URL:</b> [_1]',
3045: special => 'url link',},
3046: { name=>'subject',
3047: translate => '<b>Subject:</b> [_1]',},
3048: { name=>'keywords',
3049: translate => '<b>Keywords:</b> [_1]',},
3050: { name=>'notes',
3051: translate => '<b>Notes:</b> [_1]',},
3052: { name=>'mimetag',
3053: translate => '<b>MIME Type:</b> [_1]',},
3054: { name=>'standards',
3055: translate => '<b>Standards:</b>[_1]',},
3056: { name=>'copyrighttag',
3057: translate => '<b>Copyright/Distribution:</b> [_1]',},
3058: { name=>'count',
3059: format => "%d",
3060: translate => '<b>Access Count:</b> [_1]',},
3061: { name=>'stdno',
3062: format => "%d",
3063: translate => '<b>Number of Students:</b> [_1]',},
3064: { name=>'avetries',
3065: format => "%.2f",
3066: translate => '<b>Average Tries:</b> [_1]',},
3067: { name=>'disc',
3068: format => "%.2f",
3069: translate => '<b>Degree of Discrimination:</b> [_1]',},
3070: { name=>'difficulty',
3071: format => "%.2f",
3072: translate => '<b>Degree of Difficulty:</b> [_1]',},
3073: { name=>'clear',
3074: format => "%.2f",
3075: translate => '<b>Clear:</b> [_1]',},
3076: { name=>'depth',
3077: format => "%.2f",
3078: translate => '<b>Depth:</b> [_1]',},
3079: { name=>'helpful',
3080: format => "%.2f",
3081: translate => '<b>Helpful:</b> [_1]',},
3082: { name=>'correct',
3083: format => "%.2f",
3084: translate => '<b>Correct:</b> [_1]',},
3085: { name=>'technical',
3086: format => "%.2f",
3087: translate => '<b>Technical:</b> [_1]',},
3088: { name=>'comefrom_list',
3089: type => 'list',
3090: translate => 'Resources that lead up to this resource in maps',},
3091: { name=>'goto_list',
3092: type => 'list',
3093: translate => 'Resources that follow this resource in maps',},
3094: { name=>'sequsage_list',
3095: type => 'list',
3096: translate => 'Resources using or importing resource',},
3097: ) {
3098: next if (! exists($values{$field->{'name'}}) ||
3099: $values{$field->{'name'}} eq '');
3100: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3101: $result .= '<b>'.&mt($field->{'translate'}).'</b><ul>';
3102: foreach my $item (split(',',$values{$field->{'name'}})){
3103: $result .= '<li>'.
3104: '<a target="search_preview" '.
3105: 'href="/res/'.$item.'">'.$item.'</a></li>';
3106: }
3107: $result .= '</ul>';
3108: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3109: $result.= &mt($field->{'translate'},
3110: sprintf($field->{'format'},
3111: $values{$field->{'name'}}))."<br />\n";
3112: } else {
3113: if ($field->{'special'} eq 'url link') {
3114: $result.=
3115: &mt($field->{'translate'},
3116: '<a href="'.$values{'url'}.'" '.
3117: 'target="search_preview">'.
3118: $values{$field->{'name'}}.
3119: '</a>');
3120: } else {
3121: $result.= &mt($field->{'translate'},
3122: $values{$field->{'name'}});
3123: }
3124: $result .= "<br />\n";
3125: }
3126: }
3127: $result .= "</p>";
3128: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3129: $result .= '<p>'.$values{'extrashow'}.'</p>';
3130: }
3131: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3132: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3133: }
3134: $result .= '<hr align="left" width="200" noshade />'."\n";
3135: return $result;
3136: }
3137:
3138: ######################################################################
3139: ######################################################################
3140:
3141: =pod
3142:
3143: =item &summary_view()
3144:
3145: =cut
3146: ######################################################################
3147: ######################################################################
3148: sub summary_view {
3149: my ($prefix,%values) = @_;
3150: my $icon=&Apache::loncommon::icon($values{'url'});
3151: my $result=<<END;
3152: $prefix<img src="$icon" />
3153: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3154: target='search_preview'>$values{'author'}</a><br />
3155: $values{'title'}<br />
3156: $values{'owner'} -- $values{'lastrevisiondate'}<br />
3157: $values{'copyrighttag'}<br />
3158: $values{'extrashow'}
3159: </p>
3160: <hr align='left' width='200' noshade />
3161: END
3162: return $result;
3163: }
3164:
3165: ######################################################################
3166: ######################################################################
3167:
3168: =pod
3169:
3170: =item &compact_view()
3171:
3172: =cut
3173:
3174: ######################################################################
3175: ######################################################################
3176: sub compact_view {
3177: my ($prefix,%values) = @_;
3178: my $result =
3179: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
3180: '"> <a href="'.$values{'url'}.'" target="search_preview">'.
3181: $values{'title'}.'</a>'.(' 'x2).
3182: '<b>'.$values{'author'}.'</b><br />';
3183: return $result;
3184: }
3185:
3186:
3187: ######################################################################
3188: ######################################################################
3189:
3190: =pod
3191:
3192: =item &fielded_format_view()
3193:
3194: =cut
3195:
3196: ######################################################################
3197: ######################################################################
3198: sub fielded_format_view {
3199: my ($prefix,%values) = @_;
3200: my $icon=&Apache::loncommon::icon($values{'url'});
3201: my %Translated = &Apache::lonmeta::fieldnames();
3202: my $result=<<END;
3203: $prefix <img src="$icon" />
3204: <dl>
3205: <dt>URL:</dt>
3206: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3207: target='search_preview'>$values{'url'}</a></dd>
3208: END
3209: foreach my $field ('title','author','subject','keywords','notes',
3210: 'mimetag','language','creationdate','lastrevisiondate',
3211: 'owner','copyrighttag','hostname','abstract') {
3212: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3213: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3214: }
3215: if (&has_stat_data(\%values)) {
3216: foreach my $field (&statfields()) {
3217: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3218: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3219: }
3220: }
3221: if (&has_eval_data(\%values)) {
3222: foreach my $field (&evalfields()) {
3223: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3224: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3225: }
3226: }
3227: $result .= "</dl>\n";
3228: $result .= $values{'extrashow'};
3229: $result .= '<hr align="left" width="200" noshade />'."\n";
3230: return $result;
3231: }
3232:
3233: ######################################################################
3234: ######################################################################
3235:
3236: =pod
3237:
3238: =item &xml_sgml_view()
3239:
3240: =back
3241:
3242: =cut
3243:
3244: ######################################################################
3245: ######################################################################
3246: sub xml_sgml_view {
3247: my ($prefix,%values) = @_;
3248: my $xml = '<LonCapaResource>'."\n";
3249: # The usual suspects
3250: foreach my $field ('url','title','author','subject','keywords','notes') {
3251: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3252: }
3253: #
3254: $xml .= "<mimeInfo>\n";
3255: foreach my $field ('mime','mimetag') {
3256: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3257: }
3258: $xml .= "</mimeInfo>\n";
3259: #
3260: $xml .= "<languageInfo>\n";
3261: foreach my $field ('language','languagetag') {
3262: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3263: }
3264: $xml .= "</languageInfo>\n";
3265: #
3266: foreach my $field ('creationdate','lastrevisiondate','owner') {
3267: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3268: }
3269: #
3270: $xml .= "<copyrightInfo>\n";
3271: foreach my $field ('copyright','copyrighttag') {
3272: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3273: }
3274: $xml .= "</copyrightInfo>\n";
3275: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3276: "\n";
3277: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3278: #
3279: if (&has_stat_data(\%values)){
3280: $xml .= "<problemstatistics>\n";
3281: foreach my $field (&statfields()) {
3282: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3283: }
3284: $xml .= "</problemstatistics>\n";
3285: }
3286: #
3287: if (&has_eval_data(\%values)) {
3288: $xml .= "<evaluation>\n";
3289: foreach my $field (&evalfields) {
3290: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3291: }
3292: $xml .= "</evaluation>\n";
3293: }
3294: #
3295: $xml .= "</LonCapaResource>\n";
3296: $xml = &HTML::Entities::encode($xml,'<>&');
3297: my $result=<<END;
3298: $prefix
3299: <pre>
3300: $xml
3301: </pre>
3302: $values{'extrashow'}
3303: <hr align='left' width='200' noshade />
3304: END
3305: return $result;
3306: }
3307:
3308: ######################################################################
3309: ######################################################################
3310:
3311: =pod
3312:
3313: =item &filled() see if field is filled.
3314:
3315: =cut
3316:
3317: ######################################################################
3318: ######################################################################
3319: sub filled {
3320: my ($field)=@_;
3321: if ($field=~/\S/ && $field ne 'any') {
3322: return 1;
3323: } else {
3324: return 0;
3325: }
3326: }
3327:
3328: ######################################################################
3329: ######################################################################
3330:
3331: =pod
3332:
3333: =item &output_unparsed_phrase_error()
3334:
3335: =cut
3336:
3337: ######################################################################
3338: ######################################################################
3339: sub output_unparsed_phrase_error {
3340: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3341: my $errorstring;
3342: if ($field eq 'basicexp') {
3343: $errorstring = &mt('Unable to understand the search phrase <i>[_1]</i>. Please modify your search.',$ENV{'form.basicexp'});
3344: } else {
3345: $errorstring = &mt('Unable to understand the search phrase <b>[_1]</b>:<i>[_2]</i>.',$field,$ENV{'form.'.$field});
3346: }
3347: my $bodytag = &Apache::loncommon::bodytag('Search');
3348: my $heading = &mt('Unparsed Field');
3349: my $revise = &mt('Revise search request');
3350: # make query information persistent to allow for subsequent revision
3351: $r->print(<<ENDPAGE);
3352: <html>
3353: <head>
3354: <title>The LearningOnline Network with CAPA</title>
3355: </head>
3356: $bodytag
3357: <form method="post" action="/adm/searchcat">
3358: $hidden_fields
3359: $closebutton
3360: <hr />
3361: <h2>$heading</h2>
3362: <p>
3363: $errorstring
3364: </p>
3365: <p>
3366: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3367: </p>
3368: </body>
3369: </html>
3370: ENDPAGE
3371: }
3372:
3373: ######################################################################
3374: ######################################################################
3375:
3376: =pod
3377:
3378: =item &output_blank_field_error()
3379:
3380: Output a complete page that indicates the user has not filled in enough
3381: information to do a search.
3382:
3383: Inputs: $r (Apache request handle), $closebutton, $parms.
3384:
3385: Returns: nothing
3386:
3387: $parms is extra information to include in the 'Revise search request' link.
3388:
3389: =cut
3390:
3391: ######################################################################
3392: ######################################################################
3393: sub output_blank_field_error {
3394: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3395: my $bodytag=&Apache::loncommon::bodytag('Search');
3396: 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.');
3397: my $revise = &mt('Revise Search Request');
3398: my $heading = &mt('Unactionable Search Queary');
3399: $r->print(<<ENDPAGE);
3400: <html>
3401: <head>
3402: <title>The LearningOnline Network with CAPA</title>
3403: </head>
3404: $bodytag
3405: <form method="post" action="/adm/searchcat">
3406: $hidden_fields
3407: $closebutton
3408: <hr />
3409: <h2>$heading</h2>
3410: <p>
3411: $errormsg
3412: </p>
3413: <p>
3414: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3415: </p>
3416: </body>
3417: </html>
3418: ENDPAGE
3419: return;
3420: }
3421:
3422: ######################################################################
3423: ######################################################################
3424:
3425: =pod
3426:
3427: =item &output_date_error()
3428:
3429: Output a full html page with an error message.
3430:
3431: Inputs:
3432:
3433: $r, the request pointer.
3434: $message, the error message for the user.
3435: $closebutton, the specialized close button needed for groupsearch.
3436:
3437: =cut
3438:
3439: ######################################################################
3440: ######################################################################
3441: sub output_date_error {
3442: my ($r,$message,$closebutton,$hidden_fields)=@_;
3443: # make query information persistent to allow for subsequent revision
3444: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3445: $r->print(<<RESULTS);
3446: <html>
3447: <head>
3448: <title>The LearningOnline Network with CAPA</title>
3449: </head>
3450: $bodytag
3451: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3452: <h1>Search Catalog</h1>
3453: <form method="post" action="/adm/searchcat">
3454: $hidden_fields
3455: <input type='button' value='Revise search request'
3456: onClick='this.form.submit();' />
3457: $closebutton
3458: <hr />
3459: <h3>Error</h3>
3460: <p>
3461: $message
3462: </p>
3463: </body>
3464: </html>
3465: RESULTS
3466: }
3467:
3468: ######################################################################
3469: ######################################################################
3470:
3471: =pod
3472:
3473: =item &start_fresh_session()
3474:
3475: Cleans the global %groupsearch_db by removing all fields which begin with
3476: 'pre_' or 'store'.
3477:
3478: =cut
3479:
3480: ######################################################################
3481: ######################################################################
3482: sub start_fresh_session {
3483: delete $groupsearch_db{'mode_catalog'};
3484: foreach (keys %groupsearch_db) {
3485: if ($_ =~ /^pre_/) {
3486: delete $groupsearch_db{$_};
3487: }
3488: if ($_ =~ /^store/) {
3489: delete $groupsearch_db{$_};
3490: }
3491: }
3492: }
3493:
3494: 1;
3495:
3496: sub cleanup {
3497: if (tied(%groupsearch_db)) {
3498: unless (untie(%groupsearch_db)) {
3499: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3500: }
3501: }
3502: &untiehash();
3503: &Apache::lonmysql::disconnect_from_db();
3504: }
3505:
3506: __END__
3507:
3508: =pod
3509:
3510: =back
3511:
3512: =cut
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