File:
[LON-CAPA] /
loncom /
interface /
lonsearchcat.pm
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1.228:
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Thu Jun 3 19:23:08 2004 UTC (20 years ago) by
matthew
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Major changes to search phrase parsing. Now use recursive descent parser
to make sense of phrases. Multi-word (quoted) phrases, - (meaning not),
and 'or'd phrases are handled properly.
Added &process_phrase_input, which creates the SQL query for phrase inputs.
Removed &build_SQL_query and &recursive_SQL_query_build
Added &output_unparsed_phrase_error.
Localized &output_blank_field_error.
For basic search fixed bug where basic search phrase was not remembered
and filled in properly when the "revise search" button was hit.
1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.228 2004/06/03 19:23:08 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78: 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 course_search {
452: my $r=shift;
453: my $bodytag=&Apache::loncommon::bodytag('Course Search');
454: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
455: my $search_string = $ENV{'form.courseexp'};
456: my @New_Words;
457: if ($ENV{'form.crsrelated'}) {
458: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
459: if (@New_Words) {
460: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
461: } else {
462: $pretty_search_string .= ' '.&mt('with no related words').".";
463: }
464: }
465: my $fulltext=$ENV{'form.crsfulltext'};
466: my @allwords=($search_string,@New_Words);
467: $totalfound=0;
468: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
469: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
470: $r->rflush();
471: # ======================================================= Go through the course
472: undef %alreadyseen;
473: %alreadyseen=();
474: my $c=$r->connection;
475: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
476: &GDBM_READER(),0640)) {
477: foreach (keys %hash) {
478: if ($c->aborted()) { last; }
479: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
480: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
481: @allwords);
482: }
483: }
484: untie(%hash);
485: }
486: unless ($totalfound) {
487: $r->print('<p>'.&mt('No resources found').'.</p>');
488: }
489: # =================================================== Done going through course
490: $r->print('</body></html>');
491: }
492:
493: # =============================== This pulls up a resource and its dependencies
494:
495: sub checkonthis {
496: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
497: $alreadyseen{$url}=1;
498: $r->rflush();
499: my $result=&Apache::lonnet::metadata($url,'title').' '.
500: &Apache::lonnet::metadata($url,'subject').' '.
501: &Apache::lonnet::metadata($url,'abstract').' '.
502: &Apache::lonnet::metadata($url,'keywords');
503: if (($url) && ($fulltext)) {
504: $result.=&Apache::lonnet::ssi_body($url);
505: }
506: $result=~s/\s+/ /gs;
507: my $applies=0;
508: foreach (@allwords) {
509: if ($_=~/\w/) {
510: if ($result=~/$_/si) {
511: $applies++;
512: }
513: }
514: }
515: # Does this resource apply?
516: if ($applies) {
517: $r->print('<br />');
518: for (my $i=0;$i<=$level*5;$i++) {
519: $r->print(' ');
520: }
521: $r->print('<a href="'.$url.'" target="cat">'.
522: ($title?$title:$url).'</a><br />');
523: $totalfound++;
524: } elsif ($fulltext) {
525: $r->print(' .');
526: }
527: $r->rflush();
528: # Check also the dependencies of this one
529: my $dependencies=
530: &Apache::lonnet::metadata($url,'dependencies');
531: foreach (split(/\,/,$dependencies)) {
532: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
533: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
534: }
535: }
536: }
537:
538: sub untiehash {
539: if (tied(%hash)) {
540: untie(%hash);
541: }
542: }
543:
544: } # End of course search scoping
545:
546: sub search_html_header {
547: my $Str = <<ENDHEADER;
548: <html>
549: <head>
550: <title>The LearningOnline Network with CAPA</title>
551: </head>
552: ENDHEADER
553: return $Str;
554: }
555:
556: ######################################################################
557: ######################################################################
558:
559: =pod
560:
561: =item &print_basic_search_form()
562:
563: Prints the form for the basic search. Sorry the name is so cryptic.
564:
565: =cut
566:
567: ######################################################################
568: ######################################################################
569: sub print_basic_search_form {
570: my ($r,$closebutton,$hidden_fields) = @_;
571: my $result = ($ENV{'form.catalogmode'} ne 'groupsearch');
572: my $bodytag=&Apache::loncommon::bodytag('Search').
573: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
574: undef,undef,
575: $ENV{'form.catalogmode'} ne 'groupsearch');
576: my $scrout = &search_html_header().$bodytag;
577: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
578: # Define interface components
579: my $userelatedwords=
580: &mt('[_1] use related words',
581: &Apache::lonhtmlcommon::checkbox
582: ('related',$ENV{'form.related'},'related'));
583: my $onlysearchdomain=
584: &mt('[_1] only search domain [_2]',
585: &Apache::lonhtmlcommon::checkbox('domains',
586: $ENV{'form.domains'},
587: $r->dir_config('lonDefDomain')
588: ),
589: $r->dir_config('lonDefDomain')
590: );
591: my $adv_search_link =
592: '<a href="/adm/searchcat?'.
593: 'phase=disp_adv&'.
594: 'catalogmode='.$ENV{'form.catalogmode'}.
595: '&launch='.$ENV{'form.launch'}.
596: '&mode='.$ENV{'form.mode'}.
597: '">'.&mt('Advanced Search').'</a>';
598: #
599: $scrout.='<form name="loncapa_search" method="post" '.
600: 'action="/adm/searchcat">'.
601: '<input type="hidden" name="phase" value="basic_search" />'.
602: $hidden_fields;
603: #
604: $scrout .= '<center>'.$/;
605: if ($ENV{'request.course.id'}) {
606: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
607: } else {
608: # No need to tell them they are searching
609: $scrout.= ('<br />'x2);
610: }
611: $scrout.='<table>'.
612: '<tr><td align="center" valign="top">'.
613: &Apache::lonhtmlcommon::textbox
614: ('basicexp',
615: &HTML::Entities::encode($ENV{'form.basicexp'},'<>&"'),50
616: ).
617: '<br />'.
618: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
619: '<td><font size="-1">'.
620: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
621: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
622: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
623: '</font></td>'.
624: '</tr>'.$/;
625: #
626: $scrout .= '<tr><td align="center" colspan="2">'.
627: '<font size="-1">'.
628: '<input type="submit" name="basicsubmit" '.
629: 'value="'.&mt('Search').'" />'.
630: (' 'x2).$closebutton.(' 'x2).
631: &viewoptions().
632: '</font>'.
633: '</td></tr>'.$/;
634: $scrout .= '</table>'.$/.'</center>'.'</form>';
635: }
636: if ($ENV{'request.course.id'}) {
637: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
638: 'header' => 'Course Search',
639: 'note' => 'Enter terms or phrases, then press "Search" below',
640: 'use' => 'use related words',
641: 'full' =>'fulltext search (time consuming)'
642: );
643: $scrout.=(<<ENDCOURSESEARCH);
644: <form name="loncapa_search" method="post" action="/adm/searchcat">
645: <center>
646: <hr />
647: <h1>$lt{'header'}</h1>
648: <input type="hidden" name="phase" value="course_search" />
649: $hidden_fields
650: <p>
651: $lt{'note'}.
652: </p>
653: <p>
654: <table>
655: <tr><td>
656: ENDCOURSESEARCH
657: $scrout.=' '.
658: &Apache::lonhtmlcommon::textbox('courseexp',
659: $ENV{'form.courseexp'},40);
660: my $crscheckbox =
661: &Apache::lonhtmlcommon::checkbox('crsfulltext',
662: $ENV{'form.crsfulltext'});
663: my $relcheckbox =
664: &Apache::lonhtmlcommon::checkbox('crsrelated',
665: $ENV{'form.crsrelated'});
666: $scrout.=(<<ENDENDCOURSE);
667: </td></tr>
668: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
669: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
670: </table><p>
671: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
672: </p>
673: </center>
674: </form>
675: ENDENDCOURSE
676: }
677: $scrout.=(<<ENDDOCUMENT);
678: </body>
679: </html>
680: ENDDOCUMENT
681: $r->print($scrout);
682: return;
683: }
684: ######################################################################
685: ######################################################################
686:
687: =pod
688:
689: =item &advanced_search_form()
690:
691: Prints the advanced search form.
692:
693: =cut
694:
695: ######################################################################
696: ######################################################################
697: sub print_advanced_search_form{
698: my ($r,$closebutton,$hidden_fields) = @_;
699: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
700: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
701: undef,undef,
702: $ENV{'form.catalogmode'} ne 'groupsearch');
703: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
704: 'reset' => 'Reset',
705: 'help' => 'Help');
706: my $advanced_buttons=<<"END";
707: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
708: <input type="reset" name="reset" value='$lt{"reset"}' />
709: $closebutton
710: END
711: my $scrout=&search_html_header();
712: $scrout .= <<"ENDHEADER";
713: $bodytag
714: <form method="post" action="/adm/searchcat" name="advsearch">
715: <p>
716: $advanced_buttons
717: ENDHEADER
718: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
719: '<input type="hidden" name="phase" value="adv_search" />';
720: my %fields=&Apache::lonmeta::fieldnames();
721: #
722: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
723: $scrout .= "<table>\n";
724: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
725: (' 'x2).&searchhelp()."</font></td></tr>\n";
726: my %related_word_search =
727: ('title' => 1,
728: 'author' => 0,
729: 'owner' => 0,
730: 'authorspace' => 0,
731: 'modifyinguser'=> 0,
732: 'keywords' => 1,
733: 'notes' => 1,
734: 'abstract' => 1,
735: 'standards'=> 1,
736: 'mime' => 1,
737: );
738: #
739: foreach my $field ('title','author','owner','authorspace','modifyinguser',
740: 'keywords','notes','abstract','standards','mime') {
741: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
742: &Apache::lonmeta::prettyinput($field,
743: $ENV{'form.'.$field},
744: $field,
745: 'advsearch',
746: $related_word_search{$field},
747: '</td><td align="left">',
748: $ENV{'form.'.$field.'_related'},
749: 50);
750: if ($related_word_search{$field}) {
751: $scrout .= 'related words';
752: } else {
753: $scrout .= '</td><td> ';
754: }
755: $scrout .= '</td></tr>'.$/;
756: }
757: foreach my $field ('lowestgradelevel','highestgradelevel') {
758: $scrout.='<tr>'.
759: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
760: '<td colspan="2">'.
761: &Apache::lonmeta::prettyinput($field,
762: $ENV{'form.'.$field},
763: $field,
764: 'advsearch',
765: 0).
766: '</td></tr>'.$/;
767: }
768: $scrout.='<tr><td align="right">'.
769: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
770: &Apache::loncommon::filecategoryselect('category',
771: $ENV{'form.category'}).
772: '</td></tr>'.$/;
773: $scrout.='<tr><td align="right" valign="top">'.
774: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
775: &Apache::loncommon::domain_select('domains',
776: $ENV{'form.domains'},1).
777: '</td></tr>'.$/;
778: #
779: # Misc metadata
780: $scrout.='<tr><td align="right" valign="top">'.
781: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
782: &Apache::lonmeta::selectbox('copyright',
783: '',,
784: \&Apache::loncommon::copyrightdescription,
785: ( undef,
786: &Apache::loncommon::copyrightids)
787: ).'</td></tr>'.$/;
788: $scrout.='<tr><td align="right" valign="top">'.
789: &titlefield(&mt('Language')).'</td><td colspan="2">'.
790: &Apache::lonmeta::selectbox('language',
791: 'notset',,
792: \&Apache::loncommon::languagedescription,
793: ('any',&Apache::loncommon::languageids)
794: ).'</td></tr>';
795: $scrout .= "</table>\n";
796: #
797: # Dynamic metadata
798: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
799: $scrout .= "<table>\n";
800: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
801: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
802: foreach my $statistic
803: ({ name=>'count',
804: description=>'Network-wide number of accesses (hits)',},
805: { name=>'stdno',
806: description=>
807: 'Total number of students who have worked on this problem',},
808: { name => 'avetries',
809: description=>'Average number of tries till solved',},
810: { name => 'difficulty',
811: description=>'Degree of difficulty',},
812: { name => 'disc',
813: description=>'Degree of discrimination'}) {
814: $scrout .= '<tr><td align="right">'.
815: &titlefield(&mt($statistic->{'description'})).
816: '</td><td align="center">'.
817: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
818: 'value="" size="6" />'.
819: '</td><td align="center">'.
820: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
821: 'value="" size="6" />'.
822: '</td></tr>'.$/;
823: }
824: $scrout .= "</table>\n";
825: $scrout .= '<h3>'.&mt('Evaluation Data').'</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 $evaluation
830: ( { name => 'clear',
831: description => 'Material presented in clear way'},
832: { name =>'depth',
833: description => 'Material covered with sufficient depth'},
834: { name => 'helpful',
835: description => 'Material is helpful'},
836: { name => 'correct',
837: description => 'Material appears to be correct'},
838: { name => 'technical',
839: description => 'Resource is technically correct'}){
840: $scrout .= '<tr><td align="right">'.
841: &titlefield(&mt($evaluation->{'description'})).
842: '</td><td align="center">'.
843: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
844: 'value="" size="6" />'.
845: '</td><td align="center">'.
846: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
847: 'value="" size="6" />'.
848: '</td></tr>'.$/;
849: }
850: $scrout .= "</table>\n";
851: #
852: # Creation/Modification date limits
853: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
854: $scrout .= "\n<table>\n";
855: my $cafter =
856: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
857: 'creationdate1', # fieldname
858: 0, # current value
859: '', # special
860: 1, # includeempty
861: '', # state
862: 1, # no_hh_mm_ss
863: );
864: my $cbefore =
865: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
866: 'creationdate2', # fieldname
867: 0, # current value
868: '', # special
869: 1, # includeempty
870: '', # state
871: 1, # no_hh_mm_ss
872: );
873: $scrout .= &mt('<tr><td align="right">Created between</td>'.
874: '<td>[_1]</td></tr>'.
875: '<tr><td align="right">and </td>'.
876: '<td>[_2]</td></tr>',$cafter,$cbefore);
877: my $lafter =
878: &Apache::lonhtmlcommon::date_setter('advsearch',
879: 'revisiondate1',
880: 0, # current value
881: '', # special
882: 1, # includeempty
883: '', # state
884: 1, # no_hh_mm_ss
885: );
886: my $lbefore =
887: &Apache::lonhtmlcommon::date_setter('advsearch',
888: 'revisiondate2',
889: 0, # current value
890: '', # special
891: 1, # includeempty
892: '', # state
893: 1, # no_hh_mm_ss
894: );
895: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
896: '<td>[_1]</td></tr>'.
897: '<tr><td align="right">and</td>'.
898: '<td>[_2]</td></tr>',$lafter,$lbefore);
899: $scrout.="</table>\n";
900: $scrout.=<<ENDDOCUMENT;
901: $advanced_buttons
902: </form>
903: </body>
904: </html>
905: ENDDOCUMENT
906: $r->print($scrout);
907: return;
908: }
909:
910: ######################################################################
911: ######################################################################
912:
913: =pod
914:
915: =item &titlefield()
916:
917: Inputs: title text
918:
919: Outputs: titletext with font wrapper
920:
921: =cut
922:
923: ######################################################################
924: ######################################################################
925: sub titlefield {
926: my $title=shift;
927: return $title;
928: }
929:
930: ######################################################################
931: ######################################################################
932:
933: =pod
934:
935: =item viewoptiontext()
936:
937: Inputs: codename for view option
938:
939: Outputs: displayed text
940:
941: =cut
942:
943: ######################################################################
944: ######################################################################
945: sub viewoptiontext {
946: my $code=shift;
947: my %desc=&Apache::lonlocal::texthash
948: ('detailed' => "Detailed Citation View",
949: 'xml' => 'XML/SGML',
950: 'compact' => 'Compact View',
951: 'fielded' => 'Fielded Format',
952: 'summary' => 'Summary View');
953: return $desc{$code};
954: }
955:
956: ######################################################################
957: ######################################################################
958:
959: =pod
960:
961: =item viewoptions()
962:
963: Inputs: none
964:
965: Outputs: text for box with view options
966:
967: =cut
968:
969: ######################################################################
970: ######################################################################
971: sub viewoptions {
972: my $scrout;
973: if (! defined($ENV{'form.viewselect'})) {
974: $ENV{'form.viewselect'}='detailed';
975: }
976: $scrout.=&Apache::lonmeta::selectbox('viewselect',
977: $ENV{'form.viewselect'},
978: \&viewoptiontext,
979: sort(keys(%Views)));
980: $scrout.= ' ';
981: my $countselect = &Apache::lonmeta::selectbox('show',
982: $ENV{'form.show'},
983: undef,
984: (10,20,50,100,1000,10000));
985: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
986: '</nobr>'.$/;
987: return $scrout;
988: }
989:
990: ######################################################################
991: ######################################################################
992:
993: =pod
994:
995: =item searchhelp()
996:
997: Inputs: none
998:
999: Outputs: return little blurb on how to enter searches
1000:
1001: =cut
1002:
1003: ######################################################################
1004: ######################################################################
1005: sub searchhelp {
1006: return &mt('Enter words and quoted phrases');
1007: }
1008:
1009: ######################################################################
1010: ######################################################################
1011:
1012: =pod
1013:
1014: =item &get_persistent_form_data()
1015:
1016: Inputs: filename of database
1017:
1018: Outputs: returns undef on database errors.
1019:
1020: This function is the reverse of &make_persistent() for form data.
1021: Retrieve persistent data from %persistent_db. Retrieved items will have their
1022: values unescaped. If a form value already exists in $ENV, it will not be
1023: overwritten. Form values that are array references may have values appended
1024: to them.
1025:
1026: =cut
1027:
1028: ######################################################################
1029: ######################################################################
1030: sub get_persistent_form_data {
1031: my $filename = shift;
1032: return 0 if (! -e $filename);
1033: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1034: &GDBM_READER(),0640));
1035: #
1036: # These make sure we do not get array references printed out as 'values'.
1037: my %arrays_allowed = ('form.domains'=>1);
1038: #
1039: # Loop through the keys, looking for 'form.'
1040: foreach my $name (keys(%persistent_db)) {
1041: next if ($name !~ /^form./);
1042: # Kludgification begins!
1043: if ($name eq 'form.domains' &&
1044: $ENV{'form.searchmode'} eq 'basic' &&
1045: $ENV{'form.phase'} ne 'disp_basic') {
1046: next;
1047: }
1048: # End kludge (hopefully)
1049: next if (exists($ENV{$name}));
1050: my @values = map {
1051: &Apache::lonnet::unescape($_);
1052: } split(',',$persistent_db{$name});
1053: next if (@values <1);
1054: if ($arrays_allowed{$name}) {
1055: $ENV{$name} = [@values];
1056: } else {
1057: $ENV{$name} = $values[0] if ($values[0]);
1058: }
1059: }
1060: untie (%persistent_db);
1061: return 1;
1062: }
1063:
1064: ######################################################################
1065: ######################################################################
1066:
1067: =pod
1068:
1069: =item &get_persistent_data()
1070:
1071: Inputs: filename of database, ref to array of values to recover.
1072:
1073: Outputs: array of values. Returns undef on error.
1074:
1075: This function is the reverse of &make_persistent();
1076: Retrieve persistent data from %persistent_db. Retrieved items will have their
1077: values unescaped. If the item contains commas (before unescaping), the
1078: returned value will be an array pointer.
1079:
1080: =cut
1081:
1082: ######################################################################
1083: ######################################################################
1084: sub get_persistent_data {
1085: my $filename = shift;
1086: my @Vars = @{shift()};
1087: my @Values; # Return array
1088: return undef if (! -e $filename);
1089: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1090: &GDBM_READER(),0640));
1091: foreach my $name (@Vars) {
1092: if (! exists($persistent_db{$name})) {
1093: push @Values, undef;
1094: next;
1095: }
1096: my @values = map {
1097: &Apache::lonnet::unescape($_);
1098: } split(',',$persistent_db{$name});
1099: if (@values <= 1) {
1100: push @Values,$values[0];
1101: } else {
1102: push @Values,\@values;
1103: }
1104: }
1105: untie (%persistent_db);
1106: return @Values;
1107: }
1108:
1109: ######################################################################
1110: ######################################################################
1111:
1112: =pod
1113:
1114: =item &make_persistent()
1115:
1116: Inputs: Hash of values to save, filename of persistent database.
1117:
1118: Store variables away to the %persistent_db.
1119: Values will be escaped. Values that are array pointers will have their
1120: elements escaped and concatenated in a comma separated string.
1121:
1122: =cut
1123:
1124: ######################################################################
1125: ######################################################################
1126: sub make_persistent {
1127: my %save = %{shift()};
1128: my $filename = shift;
1129: return undef if (! tie(%persistent_db,'GDBM_File',
1130: $filename,&GDBM_WRCREAT(),0640));
1131: foreach my $name (keys(%save)) {
1132: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1133: # We handle array references, but not recursively.
1134: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1135: $persistent_db{$name} = $store;
1136: }
1137: untie(%persistent_db);
1138: return 1;
1139: }
1140:
1141: ######################################################################
1142: ######################################################################
1143:
1144: =pod
1145:
1146: =item &make_form_data_persistent()
1147:
1148: Inputs: filename of persistent database.
1149:
1150: Store most form variables away to the %persistent_db.
1151: Values will be escaped. Values that are array pointers will have their
1152: elements escaped and concatenated in a comma separated string.
1153:
1154: =cut
1155:
1156: ######################################################################
1157: ######################################################################
1158: sub make_form_data_persistent {
1159: my $r = shift;
1160: my $filename = shift;
1161: my %save;
1162: foreach (keys(%ENV)) {
1163: next if (!/^form/ || /submit/);
1164: $save{$_} = $ENV{$_};
1165: }
1166: return &make_persistent(\%save,$filename);
1167: }
1168:
1169: ######################################################################
1170: ######################################################################
1171:
1172: =pod
1173:
1174: =item &parse_advanced_search()
1175:
1176: Parse advanced search form and return the following:
1177:
1178: =over 4
1179:
1180: =item $query Scalar containing an SQL query.
1181:
1182: =item $customquery Scalar containing a custom query.
1183:
1184: =item $customshow Scalar containing commands to show custom metadata.
1185:
1186: =item $libraries_to_query Reference to array of domains to search.
1187:
1188: =back
1189:
1190: =cut
1191:
1192: ######################################################################
1193: ######################################################################
1194: sub parse_advanced_search {
1195: my ($r,$closebutton,$hidden_fields)=@_;
1196: my @BasicFields = ('title','author','subject','keywords','url','version',
1197: 'notes','abstract','extension','owner','authorspace',
1198: # 'custommetadata','customshow',
1199: 'modifyinguser','standards','mime');
1200: my @StatsFields = &statfields();
1201: my @EvalFields = &evalfields();
1202: my $fillflag=0;
1203: my $pretty_search_string = "<br />\n";
1204: # Clean up fields for safety
1205: for my $field (@BasicFields,
1206: 'creationdatestart_month','creationdatestart_day',
1207: 'creationdatestart_year','creationdateend_month',
1208: 'creationdateend_day','creationdateend_year',
1209: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1210: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1211: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1212: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1213: }
1214: foreach ('mode','form','element') {
1215: # is this required? Hmmm.
1216: next if (! exists($ENV{'form.'.$_}));
1217: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1218: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1219: }
1220: # Preprocess the category form element.
1221: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1222: ref($ENV{'form.category'}));
1223: #
1224: # Check to see if enough information was filled in
1225: foreach my $field (@BasicFields) {
1226: if (&filled($ENV{'form.'.$field})) {
1227: $fillflag++;
1228: }
1229: }
1230: foreach my $field (@StatsFields,@EvalFields) {
1231: if (&filled($ENV{'form.'.$field.'_max'})) {
1232: $fillflag++;
1233: }
1234: if (&filled($ENV{'form.'.$field.'_min'})) {
1235: $fillflag++;
1236: }
1237: }
1238:
1239: for my $field ('lowestgradelevel','highestgradelevel') {
1240: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1241: $ENV{'form.'.$field} > 0) {
1242: $fillflag++;
1243: }
1244: }
1245: if (! $fillflag) {
1246: &output_blank_field_error($r,$closebutton,
1247: 'phase=disp_adv',$hidden_fields);
1248: return ;
1249: }
1250: # Turn the form input into a SQL-based query
1251: my $query='';
1252: my @queries;
1253: my $font = '<font color="#800000" face="helvetica">';
1254: # Evaluate logical expression AND/OR/NOT phrase fields.
1255: foreach my $field (@BasicFields) {
1256: next if (!defined($ENV{'form.'.$field}) || $ENV{'form.'.$field} eq '');
1257: my ($error,$SQLQuery) =
1258: &process_phrase_input($ENV{'form.'.$field},
1259: $ENV{'form.'.$field.'_related'},$field);
1260: if (defined($error)) {
1261: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1262: $hidden_fields,$field);
1263: return;
1264: } else {
1265: $pretty_search_string .=
1266: $font.$field.'</font>: '.$ENV{'form.'.$field};
1267: if ($ENV{'form.'.$field.'_related'}) {
1268: my @Words =
1269: &Apache::loncommon::get_related_words
1270: ($ENV{'form.'.$field});
1271: if (@Words) {
1272: $pretty_search_string.= ' with related words: '.
1273: join(', ',@Words[0..4]);
1274: } else {
1275: $pretty_search_string.= ' with related words.';
1276: }
1277: }
1278: $pretty_search_string .= '<br />';
1279: push (@queries,$SQLQuery);
1280: }
1281: }
1282: #
1283: # Make the 'mime' from 'form.category' and 'form.extension'
1284: #
1285: my $searchphrase;
1286: if (exists($ENV{'form.category'}) &&
1287: $ENV{'form.category'} !~ /^\s*$/ &&
1288: $ENV{'form.category'} ne 'any') {
1289: my @extensions = &Apache::loncommon::filecategorytypes
1290: ($ENV{'form.category'});
1291: if (scalar(@extensions) > 0) {
1292: $searchphrase = join(' OR ',@extensions);
1293: }
1294: }
1295: if (defined($searchphrase)) {
1296: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1297: push @queries,$SQLsearch;
1298: $pretty_search_string .=$font.'mime</font> contains <b>'.
1299: $searchphrase.'</b><br />';
1300: }
1301: #
1302: # Evaluate option lists
1303: if ($ENV{'form.lowestgradelevel'} &&
1304: $ENV{'form.lowestgradelevel'} ne '0' &&
1305: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1306: push(@queries,
1307: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1308: $pretty_search_string.="lowestgradelevel>=".
1309: $ENV{'form.lowestgradelevel'}."<br />\n";
1310: }
1311: if ($ENV{'form.highestgradelevel'} &&
1312: $ENV{'form.highestgradelevel'} ne '0' &&
1313: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1314: push(@queries,
1315: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1316: $pretty_search_string.="highestgradelevel<=".
1317: $ENV{'form.highestgradelevel'}."<br />\n";
1318: }
1319: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1320: push @queries,"(language like \"$ENV{'form.language'}\")";
1321: $pretty_search_string.=$font."language</font>= ".
1322: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1323: "<br />\n";
1324: }
1325: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1326: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1327: $pretty_search_string.=$font."copyright</font> = ".
1328: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1329: "<br \>\n";
1330: }
1331: #
1332: # Statistics
1333: foreach my $field (@StatsFields,@EvalFields) {
1334: my ($min,$max);
1335: if (exists($ENV{'form.'.$field.'_min'}) &&
1336: $ENV{'form.'.$field.'_min'} ne '') {
1337: $min = $ENV{'form.'.$field.'_min'};
1338: }
1339: if (exists($ENV{'form.'.$field.'_max'}) &&
1340: $ENV{'form.'.$field.'_max'} ne '') {
1341: $max = $ENV{'form.'.$field.'_max'};
1342: }
1343: next if (! defined($max) && ! defined($min));
1344: if (defined($min) && defined($max)) {
1345: ($min,$max) = sort {$a <=>$b} ($min,$max);
1346: }
1347: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1348: push(@queries,'('.$field.'>'.$min.')');
1349: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1350: }
1351: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1352: push(@queries,'('.$field.'<'.$max.')');
1353: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1354: }
1355: }
1356: #
1357: # Evaluate date windows
1358: my $cafter =
1359: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1360: my $cbefore =
1361: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1362: if ($cafter > $cbefore) {
1363: my $tmp = $cafter;
1364: $cafter = $cbefore;
1365: $cbefore = $tmp;
1366: }
1367: my $mafter =
1368: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1369: my $mbefore =
1370: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1371: if ($mafter > $mbefore) {
1372: my $tmp = $mafter;
1373: $mafter = $mbefore;
1374: $mbefore = $tmp;
1375: }
1376: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1377: $mafter,$mbefore);
1378: if (defined($error)) {
1379: &output_date_error($r,$error,$closebutton,$hidden_fields);
1380: } elsif (defined($datequery)) {
1381: # Here is where you would set up pretty_search_string to output
1382: # date query information.
1383: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1384: push @queries,$datequery;
1385: }
1386: #
1387: # Process form information for custom metadata querying
1388: my $customquery=undef;
1389: ##
1390: ## The custom metadata search was removed q long time ago mostly
1391: ## because I was unable to figureout exactly how it worked and could
1392: ## not imagine people actually using it. MH
1393: ##
1394: # if ($ENV{'form.custommetadata'}) {
1395: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1396: # $ENV{'form.custommetadata'}."</b><br />\n";
1397: # $customquery=&build_custommetadata_query('custommetadata',
1398: # $ENV{'form.custommetadata'});
1399: # }
1400: my $customshow=undef;
1401: # if ($ENV{'form.customshow'}) {
1402: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1403: # $ENV{'form.customshow'}."</b><br />\n";
1404: # $customshow=$ENV{'form.customshow'};
1405: # $customshow=~s/[^\w\s]//g;
1406: # my @fields=split(/\s+/,$customshow);
1407: # $customshow=join(" ",@fields);
1408: # }
1409: ##
1410: ## Deal with restrictions to given domains
1411: ##
1412: my ($libraries_to_query,$pretty_domains_string) =
1413: &parse_domain_restrictions();
1414: $pretty_search_string .= $pretty_domains_string."<br />\n";
1415: #
1416: if (@queries) {
1417: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1418: } elsif ($customquery) {
1419: $query = '';
1420: }
1421: # &Apache::lonnet::logthis('query = '.$/.$query);
1422: return ($query,$customquery,$customshow,$libraries_to_query,
1423: $pretty_search_string);
1424: }
1425:
1426: sub parse_domain_restrictions {
1427: my $libraries_to_query = undef;
1428: # $ENV{'form.domains'} can be either a scalar or an array reference.
1429: # We need an array.
1430: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1431: return (undef,'');
1432: }
1433: my @allowed_domains;
1434: if (ref($ENV{'form.domains'})) {
1435: @allowed_domains = @{$ENV{'form.domains'}};
1436: } else {
1437: @allowed_domains = ($ENV{'form.domains'});
1438: }
1439: #
1440: my %domain_hash = ();
1441: my $pretty_domains_string;
1442: foreach (@allowed_domains) {
1443: $domain_hash{$_}++;
1444: }
1445: if ($domain_hash{'any'}) {
1446: $pretty_domains_string = "In all LON-CAPA domains.";
1447: } else {
1448: if (@allowed_domains > 1) {
1449: $pretty_domains_string = "In LON-CAPA domains:";
1450: } else {
1451: $pretty_domains_string = "In LON-CAPA domain ";
1452: }
1453: foreach (sort @allowed_domains) {
1454: $pretty_domains_string .= "<b>".$_."</b> ";
1455: }
1456: foreach (keys(%Apache::lonnet::libserv)) {
1457: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1458: push @$libraries_to_query,$_;
1459: }
1460: }
1461: }
1462: return ($libraries_to_query,$pretty_domains_string);
1463: }
1464:
1465: ######################################################################
1466: ######################################################################
1467:
1468: =pod
1469:
1470: =item &parse_basic_search()
1471:
1472: Parse the basic search form and return a scalar containing an sql query.
1473:
1474: =cut
1475:
1476: ######################################################################
1477: ######################################################################
1478: sub parse_basic_search {
1479: my ($r,$closebutton)=@_;
1480: #
1481: # Clean up fields for safety
1482: for my $field ('basicexp') {
1483: $ENV{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-]//g;
1484: }
1485: foreach ('mode','form','element') {
1486: # is this required? Hmmm.
1487: next unless (exists($ENV{"form.$_"}));
1488: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1489: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1490: }
1491: my ($libraries_to_query,$pretty_domains_string) =
1492: &parse_domain_restrictions();
1493: #
1494: # Check to see if enough of a query is filled in
1495: my $search_string = $ENV{'form.basicexp'};
1496: if (! &filled($search_string)) {
1497: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1498: return OK;
1499: }
1500: my $pretty_search_string=$search_string;
1501: my @Queries;
1502: my $searchfield = 'concat_ws(" ",'.join(',',
1503: ('title','author','subject',
1504: 'notes','abstract','keywords')
1505: ).')';
1506: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1507: $ENV{'form.related'},
1508: $searchfield);
1509: if ($error) {
1510: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1511: '','basicexp');
1512: return;
1513: }
1514: push(@Queries,$SQLQuery);
1515: #foreach my $q (@Queries) {
1516: # &Apache::lonnet::logthis(' '.$q);
1517: #}
1518: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1519: #
1520: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1521: $pretty_search_string .= ' '.$pretty_domains_string;
1522: }
1523: $pretty_search_string .= "<br />\n";
1524: $pretty_search_string =~ s:^<br /> and ::;
1525: # &Apache::lonnet::logthis($final_query);
1526: return ($final_query,$pretty_search_string,
1527: $libraries_to_query);
1528: }
1529:
1530:
1531: ###############################################################
1532: ###############################################################
1533:
1534: my @Phrases;
1535:
1536: sub concat {
1537: my ($item) = @_;
1538: my $results = '';
1539: foreach (@$item) {
1540: if (ref($_) eq 'ARRAY') {
1541: $results .= join(' ',@$_);
1542: }
1543: }
1544: return $results;
1545: }
1546:
1547: sub process_phrase_input {
1548: my ($phrase,$related,$field)=@_;
1549: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1550: my $grammar = <<'ENDGRAMMAR';
1551: searchphrase:
1552: expression /^\Z/ {
1553: # &Apache::lonsearchcat::print_item(\@item,0);
1554: [@item];
1555: }
1556: expression:
1557: phrase(s) {
1558: [@item];
1559: }
1560: phrase:
1561: orword {
1562: [@item];
1563: }
1564: | andword {
1565: [@item];
1566: }
1567: | minusword {
1568: unshift(@::Phrases,$item[1]->[0]);
1569: unshift(@::Phrases,$item[1]->[1]);
1570: [@item];
1571: }
1572: | word {
1573: unshift(@::Phrases,$item[1]);
1574: [@item];
1575: }
1576: #
1577: orword:
1578: word 'OR' phrase {
1579: unshift(@::Phrases,'OR');
1580: unshift(@::Phrases,$item[1]);
1581: [@item];
1582: }
1583: | word 'or' phrase {
1584: unshift(@::Phrases,'OR');
1585: unshift(@::Phrases,$item[1]);
1586: [@item];
1587: }
1588: | minusword 'OR' phrase {
1589: unshift(@::Phrases,'OR');
1590: unshift(@::Phrases,$item[1]->[0]);
1591: unshift(@::Phrases,$item[1]->[1]);
1592: [@item];
1593: }
1594: | minusword 'or' phrase {
1595: unshift(@::Phrases,'OR');
1596: unshift(@::Phrases,$item[1]->[0]);
1597: unshift(@::Phrases,$item[1]->[1]);
1598: [@item];
1599: }
1600: andword:
1601: word phrase {
1602: unshift(@::Phrases,'AND');
1603: unshift(@::Phrases,$item[1]);
1604: [@item];
1605: }
1606: | minusword phrase {
1607: unshift(@::Phrases,'AND');
1608: unshift(@::Phrases,$item[1]->[0]);
1609: unshift(@::Phrases,$item[1]->[1]);
1610: [@item];
1611: }
1612: #
1613: minusword:
1614: '-' word {
1615: [$item[2],'NOT'];
1616: }
1617: word:
1618: "'" term(s) "'" {
1619: &Apache::lonsearchcat::concat(\@item);
1620: }
1621: | '"' term(s) '"' {
1622: &Apache::lonsearchcat::concat(\@item);
1623: }
1624: | term {
1625: $item[1];
1626: }
1627: term:
1628: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E]+/ {
1629: $item[1];
1630: }
1631: ENDGRAMMAR
1632: #
1633: # The end result of parsing the phrase with the grammar is an array
1634: # @::Phrases.
1635: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1636: # $phrase = "genetic engineering" -dna ->
1637: # "genetic engineering","AND","NOT","dna"
1638: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1639: undef(@::Phrases);
1640: my $p = new Parse::RecDescent($grammar);
1641: if (! defined($p->searchphrase($phrase))) {
1642: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1643: return 'Unable to process phrase '.$phrase;
1644: }
1645: #
1646: # Go through the phrases and make sense of them.
1647: # Apply modifiers NOT OR and AND to the phrases.
1648: my @NewPhrases;
1649: while(@::Phrases) {
1650: my $phrase = shift(@::Phrases);
1651: # &Apache::lonnet::logthis('phrase = '.$phrase);
1652: my $phrasedata;
1653: if ($phrase =~ /^(NOT|OR|AND)$/) {
1654: if ($phrase eq 'OR') {
1655: $phrasedata->{'or'}++;
1656: if (! @::Phrases) { $phrasedata = undef; last; }
1657: $phrase = shift(@::Phrases);
1658: } elsif ($phrase eq 'AND') {
1659: $phrasedata->{'and'}++;
1660: if (! @::Phrases) { $phrasedata = undef; last; }
1661: $phrase = shift(@::Phrases);
1662: }
1663: if ($phrase eq 'NOT') {
1664: $phrasedata->{'negate'}++;
1665: if (! @::Phrases) { $phrasedata = undef; last; }
1666: $phrase = shift(@::Phrases);
1667: }
1668: }
1669: $phrasedata->{'phrase'} = $phrase;
1670: if ($related) {
1671: my @NewWords;
1672: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1673: $phrasedata->{'related_words'} = \@NewWords;
1674: }
1675: push(@NewPhrases,$phrasedata);
1676: }
1677: #
1678: # Actually build the sql query from the phrases
1679: my $SQLQuery;
1680: foreach my $phrase (@NewPhrases) {
1681: my $query;
1682: if ($phrase->{'negate'}) {
1683: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1684: } else {
1685: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1686: }
1687: foreach my $related (@{$phrase->{'related_words'}}) {
1688: if ($phrase->{'negate'}) {
1689: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1690: } else {
1691: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1692: }
1693: }
1694: if ($SQLQuery) {
1695: if ($phrase->{'or'}) {
1696: $SQLQuery .= ' OR ('.$query.')';
1697: } else {
1698: $SQLQuery .= ' AND ('.$query.')';
1699: }
1700: } else {
1701: $SQLQuery = '('.$query.')';
1702: }
1703: }
1704: #
1705: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1706: #
1707: return undef,$SQLQuery;
1708: }
1709:
1710: ######################################################################
1711: ######################################################################
1712:
1713: =pod
1714:
1715: =item &related_version()
1716:
1717: Modifies an input string to include related words. Words in the string
1718: are replaced with parenthesized lists of 'OR'd words. For example
1719: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1720:
1721: Note: Using this twice on a string is probably silly.
1722:
1723: =cut
1724:
1725: ######################################################################
1726: ######################################################################
1727: sub related_version {
1728: my ($word) = @_;
1729: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1730: my @Words = &Apache::loncommon::get_related_words($word);
1731: # Only use 4 related words
1732: @Words = ($#Words>4? @Words[0..4] : @Words);
1733: my $result = join " OR ", ($word,@Words);
1734: return $result,sort(@Words);
1735: }
1736:
1737:
1738: ######################################################################
1739: ######################################################################
1740:
1741: =pod
1742:
1743: =item &build_custommetadata_query()
1744:
1745: Constructs a custom metadata query using a rather heinous regular
1746: expression.
1747:
1748: =cut
1749:
1750: ######################################################################
1751: ######################################################################
1752: sub build_custommetadata_query {
1753: my ($field_name,$logic_statement)=@_;
1754: my $q=new Text::Query('abc',
1755: -parse => 'Text::Query::ParseAdvanced',
1756: -build => 'Text::Query::BuildAdvancedString');
1757: $q->prepare($logic_statement);
1758: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1759: # quick fix to change literal into xml tag-matching
1760: # will eventually have to write a separate builder module
1761: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1762: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1763: /\\<$1\\>?# \<wordone\>
1764: \[\^\\<\]?# [^\<]
1765: \*$2\[\^\\<\]?# *wordtwo[^\<]
1766: \*\\<\\\/$1\\>?# *\<\/wordone\>
1767: /g;
1768: return $matchexp;
1769: }
1770:
1771:
1772: ######################################################################
1773: ######################################################################
1774:
1775: =pod
1776:
1777: =item &build_date_queries()
1778:
1779: Builds a SQL logic query to check time/date entries.
1780: Also reports errors (check for /^Incorrect/).
1781:
1782: =cut
1783:
1784: ######################################################################
1785: ######################################################################
1786: sub build_date_queries {
1787: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1788: my ($result,$error,$pretty_string);
1789: #
1790: # Verify the input
1791: if (! defined($cafter) && ! defined($cbefore) &&
1792: ! defined($mafter) && ! defined($mbefore)) {
1793: # This is an okay situation, so return undef for the error
1794: return (undef,undef,undef);
1795: }
1796: if ((defined($cafter) && ! defined($cbefore)) ||
1797: (defined($cbefore) && ! defined($cafter))) {
1798: # This is bad, so let them know
1799: $error = &mt('Incorrect entry for the creation date. '.
1800: 'You must specify both the beginning and ending dates.');
1801: }
1802: if (! defined($error) &&
1803: ((defined($mafter) && ! defined($mbefore)) ||
1804: (defined($mbefore) && ! defined($mafter)))) {
1805: # This is also bad, so let them know
1806: $error = &mt('Incorrect entry for the last revision date. '.
1807: 'You must specify both the beginning and ending dates.');
1808: }
1809: if (! defined($error)) {
1810: #
1811: # Build the queries
1812: my @queries;
1813: if (defined($cbefore) && defined($cafter)) {
1814: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1815: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1816: # Correct for year being relative to 1900
1817: $cayear+=1900; $cbyear+=1900;
1818: my $cquery=
1819: '(creationdate BETWEEN '.
1820: "'".$cayear.'-'.$camon.'-'.$caday."'".
1821: ' AND '.
1822: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1823: $pretty_string .= '<br />' if (defined($pretty_string));
1824: $pretty_string .=
1825: &mt('created between [_1] and [_2]',
1826: &Apache::lonlocal::locallocaltime($cafter),
1827: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1828: push(@queries,$cquery);
1829: $pretty_string =~ s/ 00:00:00//g;
1830: }
1831: if (defined($mbefore) && defined($mafter)) {
1832: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1833: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1834: # Correct for year being relative to 1900
1835: $mayear+=1900; $mbyear+=1900;
1836: my $mquery=
1837: '(lastrevisiondate BETWEEN '.
1838: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1839: ' AND '.
1840: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1841: push(@queries,$mquery);
1842: $pretty_string .= '<br />' if (defined($pretty_string));
1843: $pretty_string .=
1844: &mt('last revised between [_1] and [_2]',
1845: &Apache::lonlocal::locallocaltime($mafter),
1846: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1847: $pretty_string =~ s/ 00:00:00//g;
1848: }
1849: if (@queries) {
1850: $result .= join(" AND ",@queries);
1851: }
1852: }
1853: return ($result,$error,$pretty_string);
1854: }
1855:
1856: ######################################################################
1857: ######################################################################
1858:
1859: =pod
1860:
1861: =item ©right_check()
1862:
1863: Inputs: $Metadata, a hash pointer of metadata for a resource.
1864:
1865: Returns: 1 if the resource is available to the user making the query,
1866: 0 otherwise.
1867:
1868: =cut
1869:
1870: ######################################################################
1871: ######################################################################
1872: sub copyright_check {
1873: my $Metadata = shift;
1874: # Check copyright tags and skip results the user cannot use
1875: my (undef,undef,$resdom,$resname) = split('/',
1876: $Metadata->{'url'});
1877: # Check for priv
1878: if (($Metadata->{'copyright'} eq 'priv') &&
1879: (($ENV{'user.name'} ne $resname) &&
1880: ($ENV{'user.domain'} ne $resdom))) {
1881: return 0;
1882: }
1883: # Check for domain
1884: if (($Metadata->{'copyright'} eq 'domain') &&
1885: ($ENV{'user.domain'} ne $resdom)) {
1886: return 0;
1887: }
1888: return 1;
1889: }
1890:
1891: ######################################################################
1892: ######################################################################
1893:
1894: =pod
1895:
1896: =item &ensure_db_and_table()
1897:
1898: Ensure we can get lonmysql to connect to the database and the table we
1899: need exists.
1900:
1901: Inputs: $r, table id
1902:
1903: Returns: undef on error, 1 if the table exists.
1904:
1905: =cut
1906:
1907: ######################################################################
1908: ######################################################################
1909: sub ensure_db_and_table {
1910: my ($r,$table) = @_;
1911: ##
1912: ## Sanity check the table id.
1913: ##
1914: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1915: $r->print("Unable to retrieve search results. ".
1916: "Unable to determine the table results were stored in. ".
1917: "</body></html>");
1918: return undef;
1919: }
1920: ##
1921: ## Make sure we can connect and the table exists.
1922: ##
1923: my $connection_result = &Apache::lonmysql::connect_to_db();
1924: if (!defined($connection_result)) {
1925: $r->print("Unable to connect to the MySQL database where your results".
1926: " are stored. </body></html>");
1927: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1928: " connect to database.");
1929: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1930: return undef;
1931: }
1932: my $table_check = &Apache::lonmysql::check_table($table);
1933: if (! defined($table_check)) {
1934: $r->print("A MySQL error has occurred.</form></body></html>");
1935: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1936: " of table ".$table);
1937: return undef;
1938: } elsif (! $table_check) {
1939: $r->print("The table of results could not be found.");
1940: &Apache::lonnet::logthis("The user requested a table, ".$table.
1941: ", that could not be found.");
1942: return undef;
1943: }
1944: return 1;
1945: }
1946:
1947: ######################################################################
1948: ######################################################################
1949:
1950: =pod
1951:
1952: =item &print_sort_form()
1953:
1954: The sort feature is not implemented at this time. This form just prints
1955: a link to change the search query.
1956:
1957: =cut
1958:
1959: ######################################################################
1960: ######################################################################
1961: sub print_sort_form {
1962: my ($r,$pretty_query_string) = @_;
1963: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1).
1964: &Apache::lonhtmlcommon::breadcrumbs
1965: (undef,'Searching','Searching',undef,undef,
1966: $ENV{'form.catalogmode'} ne 'groupsearch');
1967:
1968: ##
1969: my %SortableFields=&Apache::lonlocal::texthash(
1970: id => 'Default',
1971: title => 'Title',
1972: author => 'Author',
1973: subject => 'Subject',
1974: url => 'URL',
1975: version => 'Version Number',
1976: mime => 'Mime type',
1977: lang => 'Language',
1978: owner => 'Owner/Publisher',
1979: copyright => 'Copyright',
1980: hostname => 'Host',
1981: creationdate => 'Creation Date',
1982: lastrevisiondate => 'Revision Date'
1983: );
1984: ##
1985: my $table = $ENV{'form.table'};
1986: return if (! &ensure_db_and_table($r,$table));
1987: ##
1988: ## Get the number of results
1989: ##
1990: my $total_results = &Apache::lonmysql::number_of_rows($table);
1991: if (! defined($total_results)) {
1992: $r->print("A MySQL error has occurred.</form></body></html>");
1993: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1994: " of rows in table ".$table);
1995: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1996: return;
1997: }
1998: my $result;
1999: $result.=<<END;
2000: <html>
2001: <head>
2002: <script>
2003: function change_sort() {
2004: var newloc = "/adm/searchcat?phase=results";
2005: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
2006: newloc += "&sortby=";
2007: newloc += document.forms.statusform.elements.sortby.value;
2008: parent.resultsframe.location= newloc;
2009: }
2010: </script>
2011: <title>Results</title>
2012: </head>
2013: $bodytag
2014: <form name="statusform" action="" method="post">
2015: <input type="hidden" name="Queue" value="" />
2016: END
2017:
2018: #<h2>Sort Results</h2>
2019: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2020: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
2021: # foreach (keys(%SortableFields)) {
2022: # $result.="<option name=\"$_\"";
2023: # if ($_ eq $ENV{'form.sortby'}) {
2024: # $result.=" selected ";
2025: # }
2026: # $result.=" >$SortableFields{$_}</option>\n";
2027: # }
2028: # $result.="</select>\n";
2029: my $revise = &revise_button();
2030: $result.=<<END;
2031: <p>
2032: There are $total_results matches to your query. $revise
2033: </p><p>
2034: Search:$pretty_query_string
2035: </p>
2036: </form>
2037: </body>
2038: </html>
2039: END
2040: $r->print($result);
2041: return;
2042: }
2043:
2044: #####################################################################
2045: #####################################################################
2046:
2047: =pod
2048:
2049: =item MySQL Table Description
2050:
2051: MySQL table creation requires a precise description of the data to be
2052: stored. The use of the correct types to hold data is vital to efficient
2053: storage and quick retrieval of records. The columns must be described in
2054: the following format:
2055:
2056: =cut
2057:
2058: #####################################################################
2059: #####################################################################
2060: #
2061: # These should probably be scoped but I don't have time right now...
2062: #
2063: my @Datatypes;
2064: my @Fullindicies;
2065:
2066: ######################################################################
2067: ######################################################################
2068:
2069: =pod
2070:
2071: =item &create_results_table()
2072:
2073: Creates the table of search results by calling lonmysql. Stores the
2074: table id in $ENV{'form.table'}
2075:
2076: Inputs: none.
2077:
2078: Returns: the identifier of the table on success, undef on error.
2079:
2080: =cut
2081:
2082: ######################################################################
2083: ######################################################################
2084: sub set_up_table_structure {
2085: my ($datatypes,$fullindicies) =
2086: &LONCAPA::lonmetadata::describe_metadata_storage();
2087: # Copy the table description before modifying it...
2088: @Datatypes = @{$datatypes};
2089: unshift(@Datatypes,{name => 'id',
2090: type => 'MEDIUMINT',
2091: restrictions => 'UNSIGNED NOT NULL',
2092: primary_key => 'yes',
2093: auto_inc => 'yes' });
2094: @Fullindicies = @{$fullindicies};
2095: return;
2096: }
2097:
2098: sub create_results_table {
2099: &set_up_table_structure();
2100: my $table = &Apache::lonmysql::create_table
2101: ( { columns => \@Datatypes,
2102: FULLTEXT => [{'columns' => \@Fullindicies},],
2103: } );
2104: if (defined($table)) {
2105: $ENV{'form.table'} = $table;
2106: return $table;
2107: }
2108: return undef; # Error...
2109: }
2110:
2111: ######################################################################
2112: ######################################################################
2113:
2114: =pod
2115:
2116: =item Search Status update functions
2117:
2118: Each of the following functions changes the values of one of the
2119: input fields used to display the search status to the user. The names
2120: should be explanatory.
2121:
2122: Inputs: Apache request handler ($r), text to display.
2123:
2124: Returns: Nothing.
2125:
2126: =over 4
2127:
2128: =item &update_count_status()
2129:
2130: =item &update_status()
2131:
2132: =item &update_seconds()
2133:
2134: =back
2135:
2136: =cut
2137:
2138: ######################################################################
2139: ######################################################################
2140: sub update_count_status {
2141: my ($r,$text) = @_;
2142: $text =~ s/\'/\\\'/g;
2143: $r->print
2144: ("<script>document.statusform.count.value = ' $text'</script>\n");
2145: $r->rflush();
2146: }
2147:
2148: sub update_status {
2149: my ($r,$text) = @_;
2150: $text =~ s/\'/\\\'/g;
2151: $r->print
2152: ("<script>document.statusform.status.value = ' $text'</script>\n");
2153: $r->rflush();
2154: }
2155:
2156: {
2157: my $max_time = 40; # seconds for the search to complete
2158: my $start_time = 0;
2159: my $last_time = 0;
2160:
2161: sub reset_timing {
2162: $start_time = 0;
2163: $last_time = 0;
2164: }
2165:
2166: sub time_left {
2167: if ($start_time == 0) {
2168: $start_time = time;
2169: }
2170: my $time_left = $max_time - (time - $start_time);
2171: $time_left = 0 if ($time_left < 0);
2172: return $time_left;
2173: }
2174:
2175: sub update_seconds {
2176: my ($r) = @_;
2177: my $time = &time_left();
2178: if (($last_time-$time) > 0) {
2179: $r->print("<script>".
2180: "document.statusform.seconds.value = '$time'".
2181: "</script>\n");
2182: $r->rflush();
2183: }
2184: $last_time = $time;
2185: }
2186:
2187: }
2188:
2189: ######################################################################
2190: ######################################################################
2191:
2192: =pod
2193:
2194: =item &revise_button()
2195:
2196: Inputs: None
2197:
2198: Returns: html string for a 'revise search' button.
2199:
2200: =cut
2201:
2202: ######################################################################
2203: ######################################################################
2204: sub revise_button {
2205: my $revise_phase = 'disp_basic';
2206: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2207: my $newloc = '/adm/searchcat'.
2208: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2209: '&cleargroupsort=1'.
2210: '&phase='.$revise_phase;
2211: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2212: qq{ onClick="parent.location='$newloc';" /> };
2213: return $result;
2214: }
2215:
2216: ######################################################################
2217: ######################################################################
2218:
2219: =pod
2220:
2221: =item &run_search()
2222:
2223: Executes a search query by sending it the the other servers and putting the
2224: results into MySQL.
2225:
2226: =cut
2227:
2228: ######################################################################
2229: ######################################################################
2230: sub run_search {
2231: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2232: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2233: $bodytag.=&Apache::lonhtmlcommon::breadcrumbs
2234: (undef,'Searching','Searching',undef,undef,
2235: $ENV{'form.catalogmode'} ne 'groupsearch');
2236: my $connection = $r->connection;
2237: #
2238: # Print run_search header
2239: #
2240: $r->print(<<END);
2241: <html>
2242: <head><title>Search Status</title></head>
2243: $bodytag
2244: <form name="statusform" action="" method="post">
2245: <input type="hidden" name="Queue" value="" />
2246: END
2247: # Check to see if $pretty_string has more than one carriage return.
2248: # Assume \n s are following <br /> s and truncate the value.
2249: # (there is probably a better way)...
2250: my @Lines = split /<br \/>/,$pretty_string;
2251: if (@Lines > 2) {
2252: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
2253: }
2254: $r->print(&mt("Search: [_1]",$pretty_string));
2255: $r->rflush();
2256: #
2257: # Determine the servers we need to contact.
2258: my @Servers_to_contact;
2259: if (defined($serverlist)) {
2260: if (ref($serverlist) eq 'ARRAY') {
2261: @Servers_to_contact = @$serverlist;
2262: } else {
2263: @Servers_to_contact = ($serverlist);
2264: }
2265: } else {
2266: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2267: }
2268: my %Server_status;
2269: #
2270: # Check on the mysql table we will use to store results.
2271: my $table =$ENV{'form.table'};
2272: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2273: $r->print("Unable to determine table id to store search results in.".
2274: "The search has been aborted.</body></html>");
2275: return;
2276: }
2277: my $table_status = &Apache::lonmysql::check_table($table);
2278: if (! defined($table_status)) {
2279: $r->print("Unable to determine status of table.</body></html>");
2280: &Apache::lonnet::logthis("Bogus table id of $table for ".
2281: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2282: &Apache::lonnet::logthis("lonmysql error = ".
2283: &Apache::lonmysql::get_error());
2284: return;
2285: }
2286: if (! $table_status) {
2287: &Apache::lonnet::logthis("lonmysql error = ".
2288: &Apache::lonmysql::get_error());
2289: &Apache::lonnet::logthis("lonmysql debug = ".
2290: &Apache::lonmysql::get_debug());
2291: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2292: $r->print("The table id,$table, we tried to use is invalid.".
2293: "The search has been aborted.</body></html>");
2294: return;
2295: }
2296: ##
2297: ## Prepare for the big loop.
2298: my $hitcountsum;
2299: my $server;
2300: my $status;
2301: my $revise = &revise_button();
2302: $r->print(<<END);
2303: <table>
2304: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2305: <tr>
2306: <td><input type="text" name="status" value="" size="30" /></td>
2307: <td><input type="text" name="count" value="" size="10" /></td>
2308: <td><input type="text" name="seconds" value="" size="8" /></td>
2309: <td>$revise</td>
2310: </tr>
2311: </table>
2312: </form>
2313: END
2314: $r->rflush();
2315: &reset_timing();
2316: &update_seconds($r);
2317: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2318: while (&time_left() &&
2319: ((@Servers_to_contact) || keys(%Server_status))) {
2320: &update_seconds($r);
2321: #
2322: # Send out a search request
2323: if (@Servers_to_contact) {
2324: # Contact one server
2325: my $server = shift(@Servers_to_contact);
2326: &update_status($r,&mt('contacting [_1]',$server));
2327: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2328: $customshow,[$server]);
2329: ($server) = keys(%$reply);
2330: $Server_status{$server} = $reply->{$server};
2331: } else {
2332: # wait a sec. to give time for files to be written
2333: # This sleep statement is here instead of outside the else
2334: # block because we do not want to pause if we have servers
2335: # left to contact.
2336: if (scalar (keys(%Server_status))) {
2337: &update_status($r,
2338: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2339: }
2340: sleep(1);
2341: }
2342: #
2343: # Loop through the servers we have contacted but do not
2344: # have results from yet, looking for results.
2345: foreach my $server (keys(%Server_status)) {
2346: last if ($connection->aborted());
2347: &update_seconds($r);
2348: my $status = $Server_status{$server};
2349: if ($status eq 'con_lost') {
2350: delete ($Server_status{$server});
2351: next;
2352: }
2353: $status=~/^([\.\w]+)$/;
2354: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2355: if (-e $datafile && ! -e "$datafile.end") {
2356: &update_status($r,&mt('Receiving results from [_1]',$server));
2357: next;
2358: }
2359: last if ($connection->aborted());
2360: if (-e "$datafile.end") {
2361: &update_status($r,&mt('Reading results from [_1]',$server));
2362: if (-z "$datafile") {
2363: delete($Server_status{$server});
2364: next;
2365: }
2366: my $fh;
2367: if (!($fh=Apache::File->new($datafile))) {
2368: $r->print("Unable to open search results file for ".
2369: "server $server. Omitting from search");
2370: delete($Server_status{$server});
2371: next;
2372: }
2373: # Read in the whole file.
2374: while (my $result = <$fh>) {
2375: last if ($connection->aborted());
2376: #
2377: # Records are stored one per line
2378: chomp($result);
2379: next if (! $result);
2380: #
2381: # Parse the result.
2382: my %Fields = &parse_raw_result($result,$server);
2383: $Fields{'hostname'} = $server;
2384: #
2385: # Skip based on copyright
2386: next if (! ©right_check(\%Fields));
2387: #
2388: # Store the result in the mysql database
2389: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2390: if (! defined($result)) {
2391: $r->print(&Apache::lonmysql::get_error());
2392: }
2393: #
2394: $hitcountsum ++;
2395: &update_seconds($r);
2396: if ($hitcountsum % 50 == 0) {
2397: &update_count_status($r,$hitcountsum);
2398: }
2399: }
2400: $fh->close();
2401: # $server is only deleted if the results file has been
2402: # found and (successfully) opened. This may be a bad idea.
2403: delete($Server_status{$server});
2404: }
2405: last if ($connection->aborted());
2406: &update_count_status($r,$hitcountsum);
2407: }
2408: last if ($connection->aborted());
2409: &update_seconds($r);
2410: }
2411: &update_status($r,&mt('Search Complete [_1]',$server));
2412: &update_seconds($r);
2413: #
2414: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2415: #
2416: # We have run out of time or run out of servers to talk to and
2417: # results to get, so let the client know the top frame needs to be
2418: # loaded from /adm/searchcat
2419: $r->print("</body></html>");
2420: # if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2421: $r->print("<script>".
2422: "window.location='/adm/searchcat?".
2423: "phase=sort&".
2424: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2425: "</script>");
2426: # }
2427: return;
2428: }
2429:
2430: ######################################################################
2431: ######################################################################
2432:
2433: =pod
2434:
2435: =item &prev_next_buttons()
2436:
2437: Returns html for the previous and next buttons on the search results page.
2438:
2439: =cut
2440:
2441: ######################################################################
2442: ######################################################################
2443: sub prev_next_buttons {
2444: my ($current_min,$show,$total,$parms) = @_;
2445: return '' if ($show eq 'all'); # No links if you get them all at once.
2446: #
2447: # Create buttons
2448: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2449: $buttons .= '/>';
2450: $buttons .= ' 'x3;
2451: $buttons .= '<input type="submit" name="reload" '.
2452: 'value="'.&mt('Reload').'" />';
2453: $buttons .= ' 'x3;
2454: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2455: $buttons .= '/>';
2456: return $buttons;
2457: }
2458:
2459: ######################################################################
2460: ######################################################################
2461:
2462: =pod
2463:
2464: =item &display_results()
2465:
2466: Prints the results out for selection and perusal.
2467:
2468: =cut
2469:
2470: ######################################################################
2471: ######################################################################
2472: sub display_results {
2473: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2474: my $connection = $r->connection;
2475: $r->print(&search_results_header($importbutton,$closebutton));
2476: ##
2477: ## Set viewing function
2478: ##
2479: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2480: if (!defined($viewfunction)) {
2481: $r->print("Internal Error - Bad view selected.\n");
2482: $r->rflush();
2483: return;
2484: }
2485: ##
2486: ## $checkbox_num is a count of the number of checkboxes output on the
2487: ## page this is used only during catalogmode=groupsearch.
2488: my $checkbox_num = 0;
2489: ##
2490: ## Get the catalog controls setup
2491: ##
2492: my $action = "/adm/searchcat?phase=results";
2493: ##
2494: ## Deal with groupsearch by opening the groupsearch db file.
2495: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2496: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2497: &GDBM_WRCREAT(),0640)) {
2498: $r->print('Unable to store import results.</form></body></html>');
2499: $r->rflush();
2500: return;
2501: }
2502: }
2503: ##
2504: ## Prepare the table for querying
2505: my $table = $ENV{'form.table'};
2506: return if (! &ensure_db_and_table($r,$table));
2507: ##
2508: ## Get the number of results
2509: my $total_results = &Apache::lonmysql::number_of_rows($table);
2510: if (! defined($total_results)) {
2511: $r->print("A MySQL error has occurred.</form></body></html>");
2512: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2513: " of rows in table ".$table);
2514: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2515: return;
2516: }
2517: ##
2518: ## Determine how many results we need to get
2519: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2520: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
2521: if (exists($ENV{'form.prev'})) {
2522: $ENV{'form.start'} -= $ENV{'form.show'};
2523: } elsif (exists($ENV{'form.next'})) {
2524: $ENV{'form.start'} += $ENV{'form.show'};
2525: }
2526: $ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
2527: $ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
2528: my $min = $ENV{'form.start'};
2529: my $max;
2530: if ($ENV{'form.show'} eq 'all') {
2531: $max = $total_results ;
2532: } else {
2533: $max = $min + $ENV{'form.show'} - 1;
2534: $max = $total_results if ($max > $total_results);
2535: }
2536: ##
2537: ## Output form elements
2538: $r->print(&hidden_field('table').
2539: &hidden_field('phase').
2540: &hidden_field('persistent_db_id').
2541: &hidden_field('start')
2542: );
2543: ##
2544: ## Output links (if necessary) for 'prev' and 'next' pages.
2545: $r->print
2546: ('<table width="100%"><tr><td width="50%" align="right">'.
2547: &prev_next_buttons($min,$ENV{'form.show'},$total_results).
2548: '</td><td align="right">'.
2549: &viewoptions().'</td></tr></table>'
2550: );
2551: if ($total_results == 0) {
2552: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2553: '<h3>'.&mt('There are currently no results').'.</h3>'.
2554: "</form></body></html>");
2555: return;
2556: } else {
2557: $r->print
2558: ("<center>Results $min to $max out of $total_results</center>\n");
2559: }
2560: ##
2561: ## Get results from MySQL table
2562: my @Results = &Apache::lonmysql::get_rows($table,
2563: 'id>='.$min.' AND id<='.$max);
2564: ##
2565: ## Loop through the results and output them.
2566: foreach my $row (@Results) {
2567: if ($connection->aborted()) {
2568: &cleanup();
2569: return;
2570: }
2571: my %Fields = %{&parse_row(@$row)};
2572: my $output="<p>\n";
2573: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2574: $Fields{'title'} = 'Untitled';
2575: }
2576: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2577: $Fields{'id'},$checkbox_num++);
2578: # Render the result into html
2579: $output.= &$viewfunction($prefix,%Fields);
2580: # Print them out as they come in.
2581: $r->print($output);
2582: $r->rflush();
2583: }
2584: if (@Results < 1) {
2585: $r->print(&mt("There were no results matching your query"));
2586: } else {
2587: $r->print
2588: ('<center>'.
2589: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2590: "table=".$ENV{'form.table'}.
2591: "&phase=results".
2592: "&persistent_db_id=".
2593: $ENV{'form.persistent_db_id'})
2594: ."</center>\n"
2595: );
2596: }
2597: $r->print("</form></body></html>");
2598: $r->rflush();
2599: untie %groupsearch_db if (tied(%groupsearch_db));
2600: return;
2601: }
2602:
2603: ######################################################################
2604: ######################################################################
2605:
2606: =pod
2607:
2608: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2609:
2610: Returns html needed for the various catalog modes. Gets inputs from
2611: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2612:
2613: =cut
2614:
2615: ######################################################################
2616: ######################################################################
2617: sub catalogmode_output {
2618: my $output = '';
2619: my ($title,$url,$fnum,$checkbox_num) = @_;
2620: if ($ENV{'form.catalogmode'} eq 'interactive') {
2621: $title=~ s/\'/\\\'/g;
2622: if ($ENV{'form.catalogmode'} eq 'interactive') {
2623: $output.=<<END
2624: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2625: onClick="javascript:select_data('$title','$url')">
2626: </font>
2627: END
2628: }
2629: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2630: $groupsearch_db{"pre_${fnum}_link"}=$url;
2631: $groupsearch_db{"pre_${fnum}_title"}=$title;
2632: $output.=<<END;
2633: <font size='-1'>
2634: <input type="checkbox" name="returnvalues" value="SELECT"
2635: onClick="javascript:queue($checkbox_num,$fnum)" />
2636: </font>
2637: END
2638: }
2639: return $output;
2640: }
2641: ######################################################################
2642: ######################################################################
2643:
2644: =pod
2645:
2646: =item &parse_row()
2647:
2648: Parse a row returned from the database.
2649:
2650: =cut
2651:
2652: ######################################################################
2653: ######################################################################
2654: sub parse_row {
2655: my @Row = @_;
2656: my %Fields;
2657: if (! scalar(@Datatypes)) {
2658: &set_up_table_structure();
2659: }
2660: for (my $i=0;$i<=$#Row;$i++) {
2661: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2662: }
2663: $Fields{'language'} =
2664: &Apache::loncommon::languagedescription($Fields{'language'});
2665: $Fields{'copyrighttag'} =
2666: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2667: $Fields{'mimetag'} =
2668: &Apache::loncommon::filedescription($Fields{'mime'});
2669: return \%Fields;
2670: }
2671:
2672: ###########################################################
2673: ###########################################################
2674:
2675: =pod
2676:
2677: =item &parse_raw_result()
2678:
2679: Takes a line from the file of results and parse it. Returns a hash
2680: with keys according to column labels
2681:
2682: In addition, the following tags are set by calling the appropriate
2683: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2684:
2685: The 'title' field is set to "Untitled" if the title field is blank.
2686:
2687: 'abstract' and 'keywords' are truncated to 200 characters.
2688:
2689: =cut
2690:
2691: ###########################################################
2692: ###########################################################
2693: sub parse_raw_result {
2694: my ($result,$hostname) = @_;
2695: # conclude from self to others regarding fields
2696: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2697: (map {
2698: &Apache::lonnet::unescape($_);
2699: } (split(/\,/,$result)) );
2700: return %Fields;
2701: }
2702:
2703: ###########################################################
2704: ###########################################################
2705:
2706: =pod
2707:
2708: =item &handle_custom_fields()
2709:
2710: =cut
2711:
2712: ###########################################################
2713: ###########################################################
2714: sub handle_custom_fields {
2715: my @results = @{shift()};
2716: my $customshow='';
2717: my $extrashow='';
2718: my @customfields;
2719: if ($ENV{'form.customshow'}) {
2720: $customshow=$ENV{'form.customshow'};
2721: $customshow=~s/[^\w\s]//g;
2722: my @fields=map {
2723: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2724: } split(/\s+/,$customshow);
2725: @customfields=split(/\s+/,$customshow);
2726: if ($customshow) {
2727: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2728: }
2729: }
2730: my $customdata='';
2731: my %customhash;
2732: foreach my $result (@results) {
2733: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2734: my $tmp=$result;
2735: $tmp=~s/^custom\=//;
2736: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2737: } split(/\,/,$tmp);
2738: $customhash{$k}=$v;
2739: }
2740: }
2741: return ($extrashow,\@customfields,\%customhash);
2742: }
2743:
2744: ######################################################################
2745: ######################################################################
2746:
2747: =pod
2748:
2749: =item &search_results_header()
2750:
2751: Output the proper html headers and javascript code to deal with different
2752: calling modes.
2753:
2754: Takes most inputs directly from %ENV, except $mode.
2755:
2756: =over 4
2757:
2758: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2759:
2760: =back
2761:
2762: The following environment variables are checked:
2763:
2764: =over 4
2765:
2766: =item 'form.catalogmode'
2767:
2768: Checked for 'interactive' and 'groupsearch'.
2769:
2770: =item 'form.mode'
2771:
2772: Checked for existance & 'edit' mode.
2773:
2774: =item 'form.form'
2775:
2776: Contains the name of the form that has the input fields to set
2777:
2778: =item 'form.element'
2779:
2780: the name of the input field to put the URL into
2781:
2782: =item 'form.titleelement'
2783:
2784: the name of the input field to put the title into
2785:
2786: =back
2787:
2788: =cut
2789:
2790: ######################################################################
2791: ######################################################################
2792: sub search_results_header {
2793: my ($importbutton,$closebutton) = @_;
2794: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2795: my $result = '';
2796: # output beginning of search page
2797: # conditional output of script functions dependent on the mode in
2798: # which the search was invoked
2799: if ($ENV{'form.catalogmode'} eq 'interactive'){
2800: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2801: $result.=<<SCRIPT;
2802: <script type="text/javascript">
2803: function select_data(title,url) {
2804: changeTitle(title);
2805: changeURL(url);
2806: parent.close();
2807: }
2808: function changeTitle(val) {
2809: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2810: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2811: }
2812: }
2813: function changeURL(val) {
2814: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2815: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2816: }
2817: }
2818: </script>
2819: SCRIPT
2820: } elsif ($ENV{'form.mode'} eq 'edit') {
2821: my $form = $ENV{'form.form'};
2822: my $element = $ENV{'form.element'};
2823: my $titleelement = $ENV{'form.titleelement'};
2824: my $changetitle;
2825: if (!$titleelement) {
2826: $changetitle='function changeTitle(val) {}';
2827: } else {
2828: $changetitle=<<END;
2829: function changeTitle(val) {
2830: if (parent.targetwin.document) {
2831: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2832: } else {
2833: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2834: alert("Unable to transfer data to "+url);
2835: }
2836: }
2837: END
2838: }
2839:
2840: $result.=<<SCRIPT;
2841: <script type="text/javascript">
2842: function select_data(title,url) {
2843: changeURL(url);
2844: changeTitle(title);
2845: parent.close();
2846: }
2847: $changetitle
2848: function changeURL(val) {
2849: if (parent.targetwin.document) {
2850: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2851: } else {
2852: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2853: alert("Unable to transfer data to "+url);
2854: }
2855: }
2856: </script>
2857: SCRIPT
2858: }
2859: }
2860: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2861: <script type="text/javascript">
2862: function queue(checkbox_num,val) {
2863: if (document.forms.results.returnvalues.length != "undefined" &&
2864: typeof(document.forms.results.returnvalues.length) == "number") {
2865: if (document.forms.results.returnvalues[checkbox_num].checked) {
2866: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2867: } else {
2868: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2869: }
2870: } else {
2871: if (document.forms.results.returnvalues.checked) {
2872: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2873: } else {
2874: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2875: }
2876: }
2877: }
2878: function select_group() {
2879: parent.window.location=
2880: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2881: parent.statusframe.document.forms.statusform.elements.Queue.value;
2882: }
2883: </script>
2884: SCRIPT
2885: $result.=<<END;
2886: </head>
2887: $bodytag
2888: <form name="results" method="post" action="/adm/searchcat" >
2889: <input type="hidden" name="Queue" value="" />
2890: $importbutton
2891: END
2892: return $result;
2893: }
2894:
2895: ######################################################################
2896: ######################################################################
2897: sub search_status_header {
2898: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2899: return <<ENDSTATUS;
2900: <html><head><title>Search Status</title></head>
2901: $bodytag
2902: <h3>Search Status</h3>
2903: Sending search request to LON-CAPA servers.<br />
2904: ENDSTATUS
2905: }
2906:
2907: sub results_link {
2908: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2909: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2910: my $results_link = $basic_link."&phase=results".
2911: "&pause=1"."&start=1";
2912: return $results_link;
2913: }
2914:
2915: ######################################################################
2916: ######################################################################
2917: sub print_frames_interface {
2918: my $r = shift;
2919: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2920: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2921: my $run_search_link = $basic_link."&phase=run_search";
2922: my $results_link = &results_link();
2923: my $result = <<"ENDFRAMES";
2924: <html>
2925: <head>
2926: <script>
2927: var targetwin = opener;
2928: var queue = '';
2929: </script>
2930: <title>LON-CAPA Digital Library Search Results</title>
2931: </head>
2932: <frameset rows="150,*">
2933: <frame name="statusframe" src="$run_search_link">
2934: <frame name="resultsframe" src="$results_link">
2935: </frameset>
2936: </html>
2937: ENDFRAMES
2938:
2939: $r->print($result);
2940: return;
2941: }
2942:
2943: ######################################################################
2944: ######################################################################
2945:
2946: sub has_stat_data {
2947: my ($values) = @_;
2948: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2949: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2950: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2951: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2952: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2953: return 1;
2954: }
2955: return 0;
2956: }
2957:
2958: sub statfields {
2959: return ('count','stdno','disc','avetries','difficulty');
2960: }
2961:
2962: sub has_eval_data {
2963: my ($values) = @_;
2964: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2965: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2966: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2967: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2968: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
2969: return 1;
2970: }
2971: return 0;
2972: }
2973:
2974: sub evalfields {
2975: return ('clear','technical','correct','helpful','depth');
2976: }
2977:
2978: ######################################################################
2979: ######################################################################
2980:
2981: =pod
2982:
2983: =item Metadata Viewing Functions
2984:
2985: Output is a HTML-ified string.
2986:
2987: Input arguments are title, author, subject, url, keywords, version,
2988: notes, short abstract, mime, language, creation date,
2989: last revision date, owner, copyright, hostname, and
2990: extra custom metadata to show.
2991:
2992: =over 4
2993:
2994: =item &detailed_citation_view()
2995:
2996: =cut
2997:
2998: ######################################################################
2999: ######################################################################
3000: sub detailed_citation_view {
3001: my ($prefix,%values) = @_;
3002: my $result;
3003: $result .= '<b>'.$prefix.
3004: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
3005: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
3006: 'target="search_preview">'.$values{'title'}."</a></b>\n";
3007: $result .= "<p>\n";
3008: $result .= '<b>'.$values{'author'}.'</b>,'.
3009: ' <i>'.$values{'owner'}.'</i><br />';
3010: foreach my $field
3011: (
3012: { name=>'url',
3013: translate => '<b>URL:</b> [_1]',
3014: special => 'url link',},
3015: { name=>'subject',
3016: translate => '<b>Subject:</b> [_1]',},
3017: { name=>'keywords',
3018: translate => '<b>Keywords:</b> [_1]',},
3019: { name=>'notes',
3020: translate => '<b>Notes:</b> [_1]',},
3021: { name=>'mimetag',
3022: translate => '<b>MIME Type:</b> [_1]',},
3023: { name=>'standards',
3024: translate => '<b>Standards:</b>[_1]',},
3025: { name=>'copyrighttag',
3026: translate => '<b>Copyright/Distribution:</b> [_1]',},
3027: { name=>'count',
3028: format => "%d",
3029: translate => '<b>Access Count:</b> [_1]',},
3030: { name=>'stdno',
3031: format => "%d",
3032: translate => '<b>Number of Students:</b> [_1]',},
3033: { name=>'avetries',
3034: format => "%.2f",
3035: translate => '<b>Average Tries:</b> [_1]',},
3036: { name=>'disc',
3037: format => "%.2f",
3038: translate => '<b>Degree of Discrimination:</b> [_1]',},
3039: { name=>'difficulty',
3040: format => "%.2f",
3041: translate => '<b>Degree of Difficulty:</b> [_1]',},
3042: { name=>'clear',
3043: format => "%.2f",
3044: translate => '<b>Clear:</b> [_1]',},
3045: { name=>'depth',
3046: format => "%.2f",
3047: translate => '<b>Depth:</b> [_1]',},
3048: { name=>'helpful',
3049: format => "%.2f",
3050: translate => '<b>Helpful:</b> [_1]',},
3051: { name=>'correct',
3052: format => "%.2f",
3053: translate => '<b>Correct:</b> [_1]',},
3054: { name=>'technical',
3055: format => "%.2f",
3056: translate => '<b>Technical:</b> [_1]',},
3057: { name=>'comefrom_list',
3058: type => 'list',
3059: translate => 'Resources that lead up to this resource in maps',},
3060: { name=>'goto_list',
3061: type => 'list',
3062: translate => 'Resources that follow this resource in maps',},
3063: { name=>'sequsage_list',
3064: type => 'list',
3065: translate => 'Resources using or importing resource',},
3066: ) {
3067: next if (! exists($values{$field->{'name'}}) ||
3068: $values{$field->{'name'}} eq '');
3069: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3070: $result .= '<b>'.&mt($field->{'translate'}).'</b><ul>';
3071: foreach my $item (split(',',$values{$field->{'name'}})){
3072: $result .= '<li>'.
3073: '<a target="search_preview" '.
3074: 'href="/res/'.$item.'">'.$item.'</a></li>';
3075: }
3076: $result .= '</ul>';
3077: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3078: $result.= &mt($field->{'translate'},
3079: sprintf($field->{'format'},
3080: $values{$field->{'name'}})).'<br />'."\n";
3081: } else {
3082: if ($field->{'special'} eq 'url link') {
3083: $result.=
3084: &mt($field->{'translate'},
3085: '<a href="'.$values{'url'}.'" '.
3086: 'target="search_preview">'.
3087: $values{$field->{'name'}}.
3088: '</a>');
3089: } else {
3090: $result.= &mt($field->{'translate'},
3091: $values{$field->{'name'}});
3092: }
3093: $result .= "<br />\n";
3094: }
3095: }
3096: $result .= "</p>";
3097: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3098: $result .= '<p>'.$values{'extrashow'}.'</p>';
3099: }
3100: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3101: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3102: }
3103: $result .= '<hr align="left" width="200" noshade />'."\n";
3104: return $result;
3105: }
3106:
3107: ######################################################################
3108: ######################################################################
3109:
3110: =pod
3111:
3112: =item &summary_view()
3113:
3114: =cut
3115: ######################################################################
3116: ######################################################################
3117: sub summary_view {
3118: my ($prefix,%values) = @_;
3119: my $icon=&Apache::loncommon::icon($values{'url'});
3120: my $result=<<END;
3121: $prefix<img src="$icon" />
3122: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3123: target='search_preview'>$values{'author'}</a><br />
3124: $values{'title'}<br />
3125: $values{'owner'} -- $values{'lastrevisiondate'}<br />
3126: $values{'copyrighttag'}<br />
3127: $values{'extrashow'}
3128: </p>
3129: <hr align='left' width='200' noshade />
3130: END
3131: return $result;
3132: }
3133:
3134: ######################################################################
3135: ######################################################################
3136:
3137: =pod
3138:
3139: =item &compact_view()
3140:
3141: =cut
3142:
3143: ######################################################################
3144: ######################################################################
3145: sub compact_view {
3146: my ($prefix,%values) = @_;
3147: my $result =
3148: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
3149: '"> <a href="'.$values{'url'}.'" target="search_preview">'.
3150: $values{'title'}.'</a>'.(' 'x2).
3151: '<b>'.$values{'author'}.'</b><br />';
3152: return $result;
3153: }
3154:
3155:
3156: ######################################################################
3157: ######################################################################
3158:
3159: =pod
3160:
3161: =item &fielded_format_view()
3162:
3163: =cut
3164:
3165: ######################################################################
3166: ######################################################################
3167: sub fielded_format_view {
3168: my ($prefix,%values) = @_;
3169: my $icon=&Apache::loncommon::icon($values{'url'});
3170: my %Translated = &Apache::lonmeta::fieldnames();
3171: my $result=<<END;
3172: $prefix <img src="$icon" />
3173: <dl>
3174: <dt>URL:</dt>
3175: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
3176: target='search_preview'>$values{'url'}</a></dd>
3177: END
3178: foreach my $field ('title','author','subject','keywords','notes',
3179: 'mimetag','language','creationdate','lastrevisiondate',
3180: 'owner','copyrighttag','hostname','abstract') {
3181: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3182: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3183: }
3184: if (&has_stat_data(\%values)) {
3185: foreach my $field (&statfields()) {
3186: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3187: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3188: }
3189: }
3190: if (&has_eval_data(\%values)) {
3191: foreach my $field (&evalfields()) {
3192: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3193: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3194: }
3195: }
3196: $result .= "</dl>\n";
3197: $result .= $values{'extrashow'};
3198: $result .= '<hr align="left" width="200" noshade />'."\n";
3199: return $result;
3200: }
3201:
3202: ######################################################################
3203: ######################################################################
3204:
3205: =pod
3206:
3207: =item &xml_sgml_view()
3208:
3209: =back
3210:
3211: =cut
3212:
3213: ######################################################################
3214: ######################################################################
3215: sub xml_sgml_view {
3216: my ($prefix,%values) = @_;
3217: my $xml = '<LonCapaResource>'."\n";
3218: # The usual suspects
3219: foreach my $field ('url','title','author','subject','keywords','notes') {
3220: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3221: }
3222: #
3223: $xml .= "<mimeInfo>\n";
3224: foreach my $field ('mime','mimetag') {
3225: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3226: }
3227: $xml .= "</mimeInfo>\n";
3228: #
3229: $xml .= "<languageInfo>\n";
3230: foreach my $field ('language','languagetag') {
3231: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3232: }
3233: $xml .= "</languageInfo>\n";
3234: #
3235: foreach my $field ('creationdate','lastrevisiondate','owner') {
3236: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3237: }
3238: #
3239: $xml .= "<copyrightInfo>\n";
3240: foreach my $field ('copyright','copyrighttag') {
3241: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3242: }
3243: $xml .= "</copyrightInfo>\n";
3244: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3245: "\n";
3246: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3247: #
3248: if (&has_stat_data(\%values)){
3249: $xml .= "<problemstatistics>\n";
3250: foreach my $field (&statfields()) {
3251: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3252: }
3253: $xml .= "</problemstatistics>\n";
3254: }
3255: #
3256: if (&has_eval_data(\%values)) {
3257: $xml .= "<evaluation>\n";
3258: foreach my $field (&evalfields) {
3259: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3260: }
3261: $xml .= "</evaluation>\n";
3262: }
3263: #
3264: $xml .= "</LonCapaResource>\n";
3265: $xml = &HTML::Entities::encode($xml,'<>&');
3266: my $result=<<END;
3267: $prefix
3268: <pre>
3269: $xml
3270: </pre>
3271: $values{'extrashow'}
3272: <hr align='left' width='200' noshade />
3273: END
3274: return $result;
3275: }
3276:
3277: ######################################################################
3278: ######################################################################
3279:
3280: =pod
3281:
3282: =item &filled() see if field is filled.
3283:
3284: =cut
3285:
3286: ######################################################################
3287: ######################################################################
3288: sub filled {
3289: my ($field)=@_;
3290: if ($field=~/\S/ && $field ne 'any') {
3291: return 1;
3292: } else {
3293: return 0;
3294: }
3295: }
3296:
3297: ######################################################################
3298: ######################################################################
3299:
3300: =pod
3301:
3302: =item &output_unparsed_phrase_error()
3303:
3304: =cut
3305:
3306: ######################################################################
3307: ######################################################################
3308: sub output_unparsed_phrase_error {
3309: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3310: my $errorstring;
3311: if ($field eq 'basicexp') {
3312: $errorstring = &mt('Unable to understand the search phrase <i>[_1]</i>. Please modify your search.',$ENV{'form.basicexp'});
3313: } else {
3314: $errorstring = &mt('Unable to understand the search phrase <b>[_1]</b>:<i>[_2]</i>.',$field,$ENV{'form.'.$field});
3315: }
3316: my $bodytag = &Apache::loncommon::bodytag('Search');
3317: my $heading = &mt('Unparsed Field');
3318: my $revise = &mt('Revise search request');
3319: # make query information persistent to allow for subsequent revision
3320: $r->print(<<ENDPAGE);
3321: <html>
3322: <head>
3323: <title>The LearningOnline Network with CAPA</title>
3324: </head>
3325: $bodytag
3326: <form method="post" action="/adm/searchcat">
3327: $hidden_fields
3328: $closebutton
3329: <hr />
3330: <h2>$heading</h2>
3331: <p>
3332: $errorstring
3333: </p>
3334: <p>
3335: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3336: </p>
3337: </body>
3338: </html>
3339: ENDPAGE
3340: }
3341:
3342: ######################################################################
3343: ######################################################################
3344:
3345: =pod
3346:
3347: =item &output_blank_field_error()
3348:
3349: Output a complete page that indicates the user has not filled in enough
3350: information to do a search.
3351:
3352: Inputs: $r (Apache request handle), $closebutton, $parms.
3353:
3354: Returns: nothing
3355:
3356: $parms is extra information to include in the 'Revise search request' link.
3357:
3358: =cut
3359:
3360: ######################################################################
3361: ######################################################################
3362: sub output_blank_field_error {
3363: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3364: my $bodytag=&Apache::loncommon::bodytag('Search');
3365: 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.');
3366: my $revise = &mt('Revise Search Request');
3367: my $heading = &mt('Unactionable Search Queary');
3368: $r->print(<<ENDPAGE);
3369: <html>
3370: <head>
3371: <title>The LearningOnline Network with CAPA</title>
3372: </head>
3373: $bodytag
3374: <form method="post" action="/adm/searchcat">
3375: $hidden_fields
3376: $closebutton
3377: <hr />
3378: <h2>$heading</h2>
3379: <p>
3380: $errormsg
3381: </p>
3382: <p>
3383: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}">$revise</a>
3384: </p>
3385: </body>
3386: </html>
3387: ENDPAGE
3388: return;
3389: }
3390:
3391: ######################################################################
3392: ######################################################################
3393:
3394: =pod
3395:
3396: =item &output_date_error()
3397:
3398: Output a full html page with an error message.
3399:
3400: Inputs:
3401:
3402: $r, the request pointer.
3403: $message, the error message for the user.
3404: $closebutton, the specialized close button needed for groupsearch.
3405:
3406: =cut
3407:
3408: ######################################################################
3409: ######################################################################
3410: sub output_date_error {
3411: my ($r,$message,$closebutton,$hidden_fields)=@_;
3412: # make query information persistent to allow for subsequent revision
3413: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3414: $r->print(<<RESULTS);
3415: <html>
3416: <head>
3417: <title>The LearningOnline Network with CAPA</title>
3418: </head>
3419: $bodytag
3420: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3421: <h1>Search Catalog</h1>
3422: <form method="post" action="/adm/searchcat">
3423: $hidden_fields
3424: <input type='button' value='Revise search request'
3425: onClick='this.form.submit();' />
3426: $closebutton
3427: <hr />
3428: <h3>Error</h3>
3429: <p>
3430: $message
3431: </p>
3432: </body>
3433: </html>
3434: RESULTS
3435: }
3436:
3437: ######################################################################
3438: ######################################################################
3439:
3440: =pod
3441:
3442: =item &start_fresh_session()
3443:
3444: Cleans the global %groupsearch_db by removing all fields which begin with
3445: 'pre_' or 'store'.
3446:
3447: =cut
3448:
3449: ######################################################################
3450: ######################################################################
3451: sub start_fresh_session {
3452: delete $groupsearch_db{'mode_catalog'};
3453: foreach (keys %groupsearch_db) {
3454: if ($_ =~ /^pre_/) {
3455: delete $groupsearch_db{$_};
3456: }
3457: if ($_ =~ /^store/) {
3458: delete $groupsearch_db{$_};
3459: }
3460: }
3461: }
3462:
3463: 1;
3464:
3465: sub cleanup {
3466: if (tied(%groupsearch_db)) {
3467: unless (untie(%groupsearch_db)) {
3468: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3469: }
3470: }
3471: &untiehash();
3472: &Apache::lonmysql::disconnect_from_db();
3473: }
3474:
3475: __END__
3476:
3477: =pod
3478:
3479: =back
3480:
3481: =cut
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