1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.345 2015/06/12 21:11:07 damieng 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: =cut
56:
57: ###############################################################################
58: ###############################################################################
59:
60: package Apache::lonsearchcat;
61:
62: use strict;
63: use Apache::Constants qw(:common :http);
64: use Apache::lonnet;
65: use Apache::File();
66: use CGI qw(:standard);
67: use Text::Query;
68: use GDBM_File;
69: use Apache::loncommon();
70: use Apache::lonmysql();
71: use Apache::lonmeta;
72: use Apache::lonhtmlcommon;
73: use Apache::lonlocal;
74: use LONCAPA::lonmetadata();
75: use HTML::Entities();
76: use Parse::RecDescent;
77: use Apache::lonnavmaps;
78: use Apache::lonindexer();
79: use Apache::lonwishlist();
80: use LONCAPA;
81: use Time::HiRes qw(sleep);
82:
83: ######################################################################
84: ######################################################################
85: ##
86: ## Global variables
87: ##
88: ######################################################################
89: ######################################################################
90: my %groupsearch_db; # Database hash used to save values for the
91: # groupsearch RAT interface.
92: my %persistent_db; # gdbm hash which holds data which is supposed to
93: # persist across calls to lonsearchcat.pm
94:
95: # The different view modes and associated functions
96:
97: my %Views = ("detailed" => \&detailed_citation_view,
98: "detailedpreview" => \&detailed_citation_preview,
99: "summary" => \&summary_view,
100: "summarypreview" => \&summary_preview,
101: "fielded" => \&fielded_format_view,
102: "xml" => \&xml_sgml_view,
103: "compact" => \&compact_view);
104:
105: ######################################################################
106: ######################################################################
107: sub handler {
108: my $r = shift;
109: # &set_defaults();
110: #
111: # set form defaults
112: #
113: my $hidden_fields;# Hold all the hidden fields used to keep track
114: # of the search system state
115: my $importbutton; # button to take the selected results and go to group
116: # sorting
117: my $diropendb; # The full path to the (temporary) search database file.
118: # This is set and used in &handler() and is also used in
119: # &output_results().
120:
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($ENV{'QUERY_STRING'},
137: ['catalogmode','launch','acts','mode','form','element','pause',
138: 'phase','persistent_db_id','table','start','show',
139: 'cleargroupsort','titleelement','area','inhibitmenu']);
140: ##
141: ## The following is a trick - we wait a few seconds if asked to so
142: ## the daemon running the search can get ahead of the daemon
143: ## printing the results. We only need (theoretically) to do
144: ## this once, so the pause indicator is deleted
145: ##
146: if (exists($env{'form.pause'})) {
147: Time::HiRes::sleep(0.1);
148: delete($env{'form.pause'});
149: }
150: ##
151: ## Initialize global variables
152: ##
153: my $domain = $r->dir_config('lonDefDomain');
154: my $temp_file_dir = LONCAPA::tempdir();
155: $diropendb= $temp_file_dir .
156: "$env{'user.domain'}_$env{'user.name'}_sel_res.db";
157: #
158: # set the name of the persistent database
159: # $env{'form.persistent_db_id'} can only have digits in it.
160: if (! exists($env{'form.persistent_db_id'}) ||
161: ($env{'form.persistent_db_id'} =~ /\D/) ||
162: ($env{'form.launch'} eq '1')) {
163: $env{'form.persistent_db_id'} = time;
164: }
165:
166: my $persistent_db_file = $temp_file_dir .
167: &escape($domain).
168: '_'.&escape($env{'user.name'}).
169: '_'.$env{'form.persistent_db_id'}.'_persistent_search.db';
170: ##
171: &Apache::lonhtmlcommon::clear_breadcrumbs();
172:
173: my @allowed_searches = ('portfolio');
174: if (&Apache::lonnet::allowed('bre',$env{'request.role.domain'}) eq 'F') {
175: push(@allowed_searches,'res');
176: }
177: my $crumb_text = 'Portfolio Search';
178: if (@allowed_searches ==2) {
179: $crumb_text = 'Portfolio and Catalog Search';
180: }
181: &Apache::lonhtmlcommon::add_breadcrumb
182: ({href=>'/adm/searchcat?'.
183: &Apache::loncommon::inhibit_menu_check().
184: '&catalogmode='.$env{'form.catalogmode'}.
185: '&launch='.$env{'form.launch'}.
186: '&mode='.$env{'form.mode'},
187: text=>"$crumb_text",
188: target=>'_top',
189: bug=>'Searching',});
190: #
191: if ($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: my $msg =
198: &mt('We were unable to retrieve data describing your search.').
199: ' '.&mt('This is a serious error and has been logged.').
200: '<br />'.
201: &mt('Please alert your LON-CAPA administrator.');
202: &Apache::loncommon::simple_error_page(
203: $r,'Search Error',
204: $msg,
205: {'no_auto_mt_msg' => 1});
206: return OK;
207: }
208: }
209: } else {
210: &clean_up_environment();
211: }
212: ##
213: ## Clear out old values from groupsearch database
214: ##
215: untie %groupsearch_db if (tied(%groupsearch_db));
216: if (($env{'form.cleargroupsort'} eq '1') ||
217: (($env{'form.launch'} eq '1') &&
218: ($env{'form.catalogmode'} eq 'import'))) {
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: my $msg = 'Unable to tie hash to db file.';
227: &Apache::loncommon::simple_error_page($r,'Search Error',
228: $msg);
229: return OK;
230: }
231: }
232: ##
233: ## Configure hidden fields
234: ##
235: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
236: $env{'form.persistent_db_id'}.'" />'."\n";
237: if (exists($env{'form.catalogmode'})) {
238: $hidden_fields .= &hidden_field('catalogmode');
239: }
240: if (exists($env{'form.form'})) {
241: $hidden_fields .= &hidden_field('form');
242: }
243: if (exists($env{'form.element'})) {
244: $hidden_fields .= &hidden_field('element');
245: }
246: if (exists($env{'form.titleelement'})) {
247: $hidden_fields .= &hidden_field('titleelement');
248: }
249: if (exists($env{'form.mode'})) {
250: $hidden_fields .= &hidden_field('mode');
251: }
252: if (exists($env{'form.area'})) {
253: $hidden_fields .= &hidden_field('area');
254: }
255: if (exists($env{'form.inhibitmenu'})) {
256: $hidden_fields .= &hidden_field('inhibitmenu');
257: }
258: ##
259: ## Configure dynamic components of interface
260: ##
261: if ($env{'form.catalogmode'} eq 'interactive') {
262: $closebutton="<input type='button' name='close' value='".&mt('Close')."' ";
263: if ($env{'form.phase'} =~ /(results|run_search)/) {
264: $closebutton .="onclick='parent.close()'";
265: } else {
266: $closebutton .="onclick='self.close()'";
267: }
268: $closebutton .=" />\n";
269: } elsif ($env{'form.catalogmode'} eq 'import') {
270: $closebutton="<input type='button' name='close' value='".&mt('Close')."' ";
271: if ($env{'form.phase'} =~ /(results|run_search)/) {
272: $closebutton .="onclick='parent.close()'";
273: } else {
274: $closebutton .="onclick='self.close()'";
275: }
276: $closebutton .= " />";
277: my $txt_import = &mt('IMPORT');
278: $importbutton=<<END;
279: <input type='button' name='import' value='$txt_import'
280: onclick='javascript:select_group()' />
281: END
282: } else {
283: $closebutton = '';
284: $importbutton = '';
285: }
286: ##
287: ## Sanity checks on form elements
288: ##
289: if (!defined($env{'form.viewselect'})) {
290: $env{'form.viewselect'} ="summary";
291: }
292: $env{'form.phase'} = 'disp_basic' if (! exists($env{'form.phase'}));
293: $env{'form.show'} = 20 if (! exists($env{'form.show'}));
294: #
295: $env{'form.searchmode'} = 'basic' if (! exists($env{'form.searchmode'}));
296: if ($env{'form.phase'} eq 'adv_search' ||
297: $env{'form.phase'} eq 'disp_adv') {
298: $env{'form.searchmode'} = 'advanced';
299: }
300: #
301: if ($env{'form.searchmode'} eq 'advanced') {
302: my $srchtype = 'Catalog';
303: if ($env{'form.area'} eq 'portfolio') {
304: $srchtype = 'Portfolio';
305: }
306: &Apache::lonhtmlcommon::add_breadcrumb
307: ({href=>'/adm/searchcat?'.&Apache::loncommon::inhibit_menu_check().
308: '&phase=disp_adv'.
309: '&catalogmode='.$env{'form.catalogmode'}.
310: '&launch='.$env{'form.launch'}.
311: '&mode='.$env{'form.mode'},
312: text=>"Advanced $srchtype Search",
313: bug=>'Searching',});
314: }
315: ##
316: ## Switch on the phase
317: ##
318: if ($env{'form.phase'} eq 'disp_basic') {
319: &print_basic_search_form($r,$closebutton,$hidden_fields);
320: } elsif ($env{'form.phase'} eq 'disp_adv') {
321: &print_advanced_search_form($r,$closebutton,$hidden_fields);
322: } elsif ($env{'form.phase'} eq 'results') {
323: &display_results($r,$importbutton,$closebutton,$diropendb,
324: $env{'form.area'});
325: } elsif ($env{'form.phase'} =~ /^(sort|run_search)$/) {
326: my ($query,$customquery,$customshow,$libraries,$pretty_string,$domainsref) =
327: &get_persistent_data($persistent_db_file,
328: ['query','customquery','customshow',
329: 'libraries','pretty_string','domains']);
330: if ($env{'form.phase'} eq 'sort') {
331: &print_sort_form($r,$pretty_string);
332: } elsif ($env{'form.phase'} eq 'run_search') {
333: &run_search($r,$query,$customquery,$customshow,
334: $libraries,$pretty_string,$env{'form.area'},$domainsref);
335: }
336: } elsif(($env{'form.phase'} eq 'basic_search') ||
337: ($env{'form.phase'} eq 'adv_search')) {
338: #
339: # We are running a search, try to parse it
340: my ($query,$customquery,$customshow,$libraries,$domains) =
341: (undef,undef,undef,undef,undef);
342: my $pretty_string;
343: if ($env{'form.phase'} eq 'basic_search') {
344: ($query,$pretty_string,$libraries,$domains) =
345: &parse_basic_search($r,$closebutton,$hidden_fields);
346: return OK if (! defined($query));
347: &make_persistent({ basicexp => $env{'form.basicexp'}},
348: $persistent_db_file);
349: } else { # Advanced search
350: ($query,$customquery,$customshow,$libraries,$pretty_string,$domains)
351: = &parse_advanced_search($r,$closebutton,$hidden_fields);
352: return OK if (! defined($query));
353: }
354: &make_persistent({ query => $query,
355: customquery => $customquery,
356: customshow => $customshow,
357: libraries => $libraries,
358: pretty_string => $pretty_string,
359: domains => $domains },
360: $persistent_db_file);
361: #
362: # Set up table
363: if (! defined(&create_results_table($env{'form.area'}))) {
364: my $errorstring=&Apache::lonmysql::get_error();
365: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
366: 'needed table. lonmysql error:'.
367: $errorstring);
368:
369: my $msg =
370: 'Unable to create table in which to save search results. '.
371: 'The search has been aborted.';
372: &Apache::loncommon::simple_error_page($r,'Search Error',
373: $msg);
374: return OK;
375: }
376: delete($env{'form.launch'});
377: if (! &make_form_data_persistent($r,$persistent_db_file)) {
378: my $msg=
379: 'Unable to properly save search information. '.
380: 'The search has been aborted.';
381: &Apache::loncommon::simple_error_page($r,'Search Error',
382: $msg);
383: return OK;
384: }
385: ##
386: ## Print out the frames interface
387: ##
388: if (defined($query)) {
389: &print_frames_interface($r);
390: }
391: }
392: return OK;
393: }
394:
395: #
396: # The mechanism used to store values away and retrieve them does not
397: # handle the case of missing environment variables being significant.
398: #
399: # This routine sets non existant checkbox form elements to ''.
400: #
401: sub clean_up_environment {
402: if ($env{'form.phase'} eq 'basic_search') {
403: if (! exists($env{'form.related'})) {
404: $env{'form.related'} = '';
405: }
406: if (! exists($env{'form.domains'})) {
407: $env{'form.domains'} = '';
408: }
409: } elsif ($env{'form.phase'} eq 'adv_search') {
410: foreach my $field ('title','keywords','notes',
411: 'abstract','standards','mime') {
412: if (! exists($env{'form.'.$field.'_related'})) {
413: $env{'form.'.$field.'_related'} = '';
414: }
415: }
416: } elsif ($env{'form.phase'} eq 'course_search') {
417: if (! exists($env{'form.crsrelated'})) {
418: $env{'form.crsrelated'} = '';
419: }
420: }
421: }
422:
423: sub hidden_field {
424: my ($name,$value) = @_;
425: if (! defined($value)) {
426: $value = $env{'form.'.$name};
427: }
428: return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
429: }
430:
431: ######################################################################
432:
433: =pod
434:
435: =over 4
436:
437: =item &print_basic_search_form()
438:
439: Prints the form for the basic search. Sorry the name is so cryptic.
440:
441: =cut
442:
443: ######################################################################
444: ######################################################################
445: sub print_basic_search_form {
446: my ($r,$closebutton,$hidden_fields) = @_;
447: my $result = ($env{'form.catalogmode'} ne 'import');
448: my $bread_crumb =
449: &Apache::lonhtmlcommon::breadcrumbs('Searching','Search_Basic',
450: $env{'form.catalogmode'} ne 'import');
451: my $scrout = &Apache::loncommon::start_page('Content Library').$bread_crumb;
452: # Search form for resource space
453: if (&Apache::lonnet::allowed('bre',$env{'request.role.domain'}) eq 'F') {
454: $scrout .= &setup_basic_search($r,'res',$hidden_fields,$closebutton);
455: $scrout .= '<hr /><br />';
456: }
457: # Search form for accessible portfolio files
458: $scrout.= &setup_basic_search($r,'portfolio',$hidden_fields,$closebutton);
459: $scrout .= &Apache::loncommon::end_page();
460: $r->print($scrout);
461: return;
462: }
463:
464: sub setup_basic_search {
465: my ($r,$area,$hidden_fields,$closebutton) = @_;
466: # Define interface components
467: my %lt = &Apache::lonlocal::texthash (
468: res => 'LON-CAPA Catalog Search',
469: portfolio => 'Portfolio Search',
470: );
471: my ($userelatedwords,$onlysearchdomain,$inclext,$adv_search_link,$scrout);
472:
473: $userelatedwords = '<label>'
474: .&Apache::lonhtmlcommon::checkbox(
475: 'related',
476: $env{'form.related'},
477: 'related')
478: .' '
479: .&mt('use related words')
480: .'</label>';
481:
482: $onlysearchdomain = '<label>'
483: .&Apache::lonhtmlcommon::checkbox(
484: 'domains',
485: $env{'form.domains'},
486: $r->dir_config('lonDefDomain'))
487: .' '
488: .&mt('only search domain [_1]'
489: ,'<b>'.$r->dir_config('lonDefDomain').'</b>')
490: .'</label>';
491:
492: $adv_search_link = '<a href="/adm/searchcat?'.
493: &Apache::loncommon::inhibit_menu_check().
494: '&phase=disp_adv'.
495: '&catalogmode='.$env{'form.catalogmode'}.
496: '&launch='.$env{'form.launch'}.
497: '&mode='.$env{'form.mode'}.
498: '&area='.$area.
499: '&form='.$env{'form.form'}.
500: '&titleelement='.$env{'form.titleelement'}.
501: '&element='.$env{'form.element'}.
502: '">'.&mt('Advanced Search').'</a>';
503: #
504: $scrout.='<form name="loncapa_search" method="post" '.
505: 'action="/adm/searchcat">'.
506: '<input type="hidden" name="phase" value="basic_search" />'.
507: $hidden_fields;
508: if (!exists($env{'form.area'})) {
509: $scrout .= '<input type="hidden" name="area" value="'.$area.'" />';
510: }
511: #
512: $scrout .= '<div align="center">'.$/;
513: # if ($env{'request.course.id'}) {
514: $scrout .= '<h1>'.$lt{$area}.'</h1>';
515: # } else {
516: # No need to tell them they are searching
517: # $scrout.= ('<br />'x2);
518: # }
519: $scrout.='<table>'.
520: '<tr><td align="center" valign="top">'.
521: &Apache::lonhtmlcommon::textbox('basicexp',
522: $env{'form.basicexp'},50).
523: '<br />'.
524: '<span class="LC_fontsize_small">'.&searchhelp().'</span>'.'</td>'.
525: '<td>'.
526: '<span class="LC_nobreak">'.(' 'x3).$adv_search_link.'</span>'.'<br />'.
527: '<span class="LC_nobreak">'.(' 'x1).$userelatedwords.'</span>'.'<br />'.
528: '<span class="LC_nobreak">'.(' 'x1).$onlysearchdomain.'</span>'.'<br />'.
529: '<span class="LC_nobreak">'.(' 'x1).$inclext.'</span>'.'<br />'.
530: '</td>'.
531: '</tr>'.
532: '</table>'.$/;
533: #
534: $scrout .= '<p>'
535: .&viewoptions()
536: .'</p>'
537: .'<p>'
538: .'<input type="submit" name="basicsubmit" '
539: .'value="'.&mt('Search').'" />'
540: .' '
541: .$closebutton
542: .'</p>';
543: #
544: $scrout .= '</div>'.'</form>';
545: return $scrout;
546: }
547:
548: ######################################################################
549: ######################################################################
550:
551: =pod
552:
553: =item &advanced_search_form()
554:
555: Prints the advanced search form.
556:
557: =cut
558:
559: ######################################################################
560: ######################################################################
561: sub print_advanced_search_form{
562: my ($r,$closebutton,$hidden_fields) = @_;
563: my $bread_crumb =
564: &Apache::lonhtmlcommon::breadcrumbs('Searching','Search_Advanced',
565: $env{'form.catalogmode'} ne 'import');
566: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
567: 'reset' => 'Reset',
568: 'help' => 'Help');
569: my $advanced_buttons=<<"END";
570: <p>
571: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
572: <input type="reset" name="reset" value='$lt{"reset"}' />
573: $closebutton
574: </p>
575: END
576: my $srchtype = 'Catalog';
577: my $jscript;
578: if ($env{'form.area'} eq 'portfolio') {
579: $srchtype = 'Portfolio';
580: $jscript = '<script type="text/javascript">
581: // <![CDATA[
582: function additional_metadata() {
583: if (document.advsearch.newfield.checked) {
584: document.advsearch.phase.value = "disp_adv";
585: document.advsearch.numaddedfields.value = parseInt(document.advsearch.numaddedfields.value) +1;
586: document.advsearch.submit();
587: }
588: }
589: // ]]>
590: </script>';
591: }
592: my $scrout= &Apache::loncommon::start_page("Advanced $srchtype Search",
593: $jscript);
594: $scrout .= $bread_crumb;
595:
596: $scrout .= '<form method="post" action="/adm/searchcat" name="advsearch">'
597: .$hidden_fields
598: .'<input type="hidden" name="phase" value="adv_search" />';
599:
600: $scrout .= '<fieldset>'."\n"
601: .'<legend>'.&mt('Display Options').'</legend>'."\n"
602: .&viewoptions()
603: .'</fieldset>';
604:
605: $scrout .= $advanced_buttons;
606:
607: $scrout .= &Apache::lonhtmlcommon::start_pick_box();
608:
609: my %fields=&Apache::lonmeta::fieldnames();
610:
611: # Standard Metadata
612: $scrout .= &Apache::lonhtmlcommon::row_headline()
613: .'<h3>'.&mt("Standard $srchtype Metadata").'</h3>'
614: .&searchhelp()
615: .&Apache::lonhtmlcommon::row_closure();
616: my %related_word_search =
617: ('title' => 1,
618: 'author' => 0,
619: 'owner' => 0,
620: 'authorspace' => 0,
621: 'modifyinguser'=> 0,
622: 'keywords' => 1,
623: 'notes' => 1,
624: 'abstract' => 1,
625: 'standards'=> 1,
626: 'mime' => 1,
627: 'subject' => 1,
628: );
629: #
630: foreach my $field ('title','author','subject','owner','authorspace',
631: 'modifyinguser','keywords','notes','abstract',
632: 'standards','mime') {
633: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield($fields{$field}))
634: .&Apache::lonmeta::prettyinput($field,
635: $env{'form.'.$field},
636: $field,
637: 'advsearch',
638: $related_word_search{$field},
639: '',
640: $env{'form.'.$field.'_related'},
641: 50);
642: if ($related_word_search{$field}) {
643: $scrout .= &mt('related words');
644: } else {
645: $scrout .= '';
646: }
647: $scrout .= &Apache::lonhtmlcommon::row_closure();
648: }
649: foreach my $field ('lowestgradelevel','highestgradelevel') {
650: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield($fields{$field}))
651: .&Apache::lonmeta::prettyinput($field,
652: $env{'form.'.$field},
653: $field,
654: 'advsearch',
655: 0)
656: .&Apache::lonhtmlcommon::row_closure();
657: }
658:
659: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt('MIME Type Category')))
660: .&Apache::loncommon::filecategoryselect('category',
661: $env{'form.category'})
662: .&Apache::lonhtmlcommon::row_closure();
663:
664: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt('Domains')))
665: .&Apache::loncommon::domain_select('domains',
666: $env{'form.domains'},1)
667: .&Apache::lonhtmlcommon::row_closure();
668:
669: # Misc metadata
670: if ($env{'form.area'} ne 'portfolio') {
671: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt('Copyright/Distribution')))
672: .&Apache::lonmeta::selectbox('copyright',
673: $env{'form.copyright'},
674: \&Apache::loncommon::copyrightdescription,
675: ( undef,
676: &Apache::loncommon::copyrightids)
677: )
678: .&Apache::lonhtmlcommon::row_closure();
679: }
680:
681: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt('Language')))
682: .&Apache::lonmeta::selectbox('language',
683: $env{'form.language'},
684: \&Apache::loncommon::languagedescription,
685: ('any',&Apache::loncommon::languageids)
686: )
687: .&Apache::lonhtmlcommon::row_closure();
688:
689: # Portfolio Metadata
690: if ($env{'form.area'} eq 'portfolio') {
691: # Added fields
692: my $curnumadd = $env{'form.numaddedfields'};
693: if ($curnumadd eq '') {
694: $curnumadd = 1;
695: }
696: $scrout .= &Apache::lonhtmlcommon::row_headline()
697: .'<h3>'.&mt('Custom Metadata fields').'</h3>'
698: .&Apache::lonhtmlcommon::row_closure()
699: .&Apache::lonhtmlcommon::row_title('')
700: .&mt('Field Name').' | '.&mt('Field Value(s)')
701: .&Apache::lonhtmlcommon::row_closure();
702:
703: for (my $j=0; $j<$curnumadd; $j++) {
704: my $num = $j+1;
705: $scrout .= &Apache::lonhtmlcommon::row_title(&mt('Custom metadata [_1]',$num))
706: .'<input type="text"'
707: .' name="addedfield_'.$j.'" size="10"'
708: .' value="'.$env{'form.addedfield_'.$j}.'" />'
709: .' '
710: .'<input type="text" '
711: .'name="addedvalues_'.$j.'" size="15"'
712: .' value="'.$env{'form.addedvalues_'.$j}.'" />'
713: .&Apache::lonhtmlcommon::row_closure();
714: }
715: $scrout .= &Apache::lonhtmlcommon::row_title('')
716: .'<label>'
717: .'<input type="checkbox" name="newfield"'
718: .' value="1" onclick="javascript:additional_metadata()" />'
719: .&mt('Another custom field/value pair?').'</label>'
720: .'<input type="hidden" name="numaddedfields"'
721: .' value="'.$curnumadd.'" />'
722: .&Apache::lonhtmlcommon::row_closure();
723: } else {
724: #
725: # Dynamic metadata
726: $scrout .= &Apache::lonhtmlcommon::row_headline()
727: .'<h3>'.&mt('Problem Statistics').'</h3>'
728: .&Apache::lonhtmlcommon::row_closure();
729: $scrout .= &Apache::lonhtmlcommon::row_title('')
730: .&mt('Minimum').' | '.&mt('Maximum')
731: .&Apache::lonhtmlcommon::row_closure();
732: foreach my $statistic
733: ({ name=>'count',
734: description=>'Network-wide number of accesses (hits)',},
735: { name=>'stdno',
736: description=>
737: 'Statistics calculated for number of students',},
738: { name => 'avetries',
739: description=>'Average number of tries till solved',},
740: { name => 'difficulty',
741: description=>'Degree of difficulty',},
742: { name => 'disc',
743: description=>'Degree of discrimination'}) {
744: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt($statistic->{'description'})))
745: .'<input type="text" name="'.$statistic->{'name'}
746: .'_min" value="" size="6" />'
747: .' '
748: .'<input type="text" name="'.$statistic->{'name'}
749: .'_max" value="" size="6" />'
750: .&Apache::lonhtmlcommon::row_closure();
751: }
752:
753: $scrout .= &Apache::lonhtmlcommon::row_headline()
754: .'<h3>'.&mt('Evaluation Data').'</h3>'
755: .&Apache::lonhtmlcommon::row_closure();
756: $scrout .= &Apache::lonhtmlcommon::row_title('')
757: .&mt('Minimum').' | '.&mt('Maximum')
758: .&Apache::lonhtmlcommon::row_closure();
759: foreach my $evaluation
760: ( { name => 'clear',
761: description => 'Material presented in clear way'},
762: { name =>'depth',
763: description => 'Material covered with sufficient depth'},
764: { name => 'helpful',
765: description => 'Material is helpful'},
766: { name => 'correct',
767: description => 'Material appears to be correct'},
768: { name => 'technical',
769: description => 'Resource is technically correct'}){
770: $scrout .= &Apache::lonhtmlcommon::row_title(&titlefield(&mt($evaluation->{'description'})))
771: .'<input type="text" name="'
772: .$evaluation->{'name'}.'_min" value="" size="6" />'
773: .' '
774: .'<input type="text" name="'
775: .$evaluation->{'name'}.'_max" value="" size="6" />'
776: .&Apache::lonhtmlcommon::row_closure();
777: }
778: }
779: #
780: # Creation/Modification date limits
781: $scrout .= &Apache::lonhtmlcommon::row_headline()
782: .'<h3>'.&mt('Creation and Modification dates').'</h3>'
783: .&Apache::lonhtmlcommon::row_closure();
784: $scrout .= &Apache::lonhtmlcommon::row_title('')
785: .&mt('Month[_1]Day[_2]Year',' 'x14,' 'x6)
786: .&Apache::lonhtmlcommon::row_closure();
787:
788: my $cafter =
789: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
790: 'creationdate1', # fieldname
791: 0, # current value
792: '', # special
793: 1, # includeempty
794: '', # state
795: 1, # no_hh_mm_ss
796: );
797: my $cbefore =
798: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
799: 'creationdate2', # fieldname
800: 0, # current value
801: '', # special
802: 1, # includeempty
803: '', # state
804: 1, # no_hh_mm_ss
805: );
806: $scrout .= &Apache::lonhtmlcommon::row_title(&mt('Created between'))
807: .$cafter
808: .&Apache::lonhtmlcommon::row_closure(1)
809: .&Apache::lonhtmlcommon::row_title(&mt('and'))
810: .$cbefore
811: .&Apache::lonhtmlcommon::row_closure();
812:
813: my $lafter =
814: &Apache::lonhtmlcommon::date_setter('advsearch',
815: 'revisiondate1',
816: 0, # current value
817: '', # special
818: 1, # includeempty
819: '', # state
820: 1, # no_hh_mm_ss
821: );
822: my $lbefore =
823: &Apache::lonhtmlcommon::date_setter('advsearch',
824: 'revisiondate2',
825: 0, # current value
826: '', # special
827: 1, # includeempty
828: '', # state
829: 1, # no_hh_mm_ss
830: );
831: $scrout .= &Apache::lonhtmlcommon::row_title(&mt('Last modified between'))
832: .$lafter
833: .&Apache::lonhtmlcommon::row_closure(1)
834: .&Apache::lonhtmlcommon::row_title(&mt('and'))
835: .$lbefore
836: .&Apache::lonhtmlcommon::row_closure(1); # Last row of total pick_box
837:
838: $scrout .= &Apache::lonhtmlcommon::end_pick_box();
839:
840: $scrout .= $advanced_buttons
841: .'</form>';
842:
843: $scrout .= &Apache::loncommon::end_page();
844: $r->print($scrout);
845: return;
846: }
847:
848: ######################################################################
849: ######################################################################
850:
851: =pod
852:
853: =item &titlefield()
854:
855: Inputs: title text
856:
857: Outputs: titletext with font wrapper
858:
859: =cut
860:
861: ######################################################################
862: ######################################################################
863: sub titlefield {
864: my $title=shift;
865: return $title;
866: }
867:
868: ######################################################################
869: ######################################################################
870:
871: =pod
872:
873: =item viewoptiontext()
874:
875: Inputs: codename for view option
876:
877: Outputs: displayed text
878:
879: =cut
880:
881: ######################################################################
882: ######################################################################
883: sub viewoptiontext {
884: my $code=shift;
885: my %desc=&Apache::lonlocal::texthash
886: ('detailed' => "Detailed Citation View",
887: 'xml' => 'XML/SGML',
888: 'compact' => 'Compact View',
889: 'fielded' => 'Fielded Format',
890: 'summary' => 'Summary View',
891: 'summarypreview' => 'Summary Preview',
892: 'detailedpreview' => 'Detailed Citation Preview');
893: return $desc{$code};
894: }
895:
896: ######################################################################
897: ######################################################################
898:
899: =pod
900:
901: =item viewoptions()
902:
903: Inputs: none
904:
905: Outputs: text for box with view options
906:
907: =cut
908:
909: ######################################################################
910: ######################################################################
911: sub viewoptions {
912: my $scrout;
913: if (! defined($env{'form.viewselect'})) {
914: $env{'form.viewselect'}='detailed';
915: }
916: $scrout .= '<span class="LC_nobreak">'
917: .&mt('Type:').' '
918: .&Apache::lonmeta::selectbox('viewselect',
919: $env{'form.viewselect'},
920: \&viewoptiontext,
921: sort(keys(%Views)))
922: .'</span>';
923: my $countselect = &Apache::lonmeta::selectbox('show',
924: $env{'form.show'},
925: undef,
926: (10,20,50,100,1000,10000));
927: $scrout .= ' <span class="LC_nobreak">'
928: .&mt('Records per Page:').' '.$countselect
929: .'</span>'.$/;
930: return $scrout;
931: }
932:
933: ######################################################################
934: ######################################################################
935:
936: =pod
937:
938: =item searchhelp()
939:
940: Inputs: none
941:
942: Outputs: return little blurb on how to enter searches
943:
944: =cut
945:
946: ######################################################################
947: ######################################################################
948: sub searchhelp {
949: return &mt('Enter words and quoted phrases');
950: }
951:
952: ######################################################################
953: ######################################################################
954:
955: =pod
956:
957: =item &get_persistent_form_data()
958:
959: Inputs: filename of database
960:
961: Outputs: returns undef on database errors.
962:
963: This function is the reverse of &make_persistent() for form data.
964: Retrieve persistent data from %persistent_db. Retrieved items will have their
965: values unescaped. If a form value already exists in $env, it will not be
966: overwritten. Form values that are array references may have values appended
967: to them.
968:
969: =cut
970:
971: ######################################################################
972: ######################################################################
973: sub get_persistent_form_data {
974: my $filename = shift;
975: return 0 if (! -e $filename);
976: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
977: &GDBM_READER(),0640));
978: #
979: # These make sure we do not get array references printed out as 'values'.
980: my %arrays_allowed = ('form.domains'=>1);
981: #
982: # Loop through the keys, looking for 'form.'
983: foreach my $name (keys(%persistent_db)) {
984: next if ($name !~ /^form./);
985: # Kludgification begins!
986: if ($name eq 'form.domains' &&
987: $env{'form.searchmode'} eq 'basic' &&
988: $env{'form.phase'} ne 'disp_basic') {
989: next;
990: }
991: # End kludge (hopefully)
992: next if (exists($env{$name}));
993: my @values = map {
994: &unescape($_);
995: } split(',',$persistent_db{$name});
996: next if (@values <1);
997: if ($arrays_allowed{$name}) {
998: $env{$name} = [@values];
999: } else {
1000: $env{$name} = $values[0] if ($values[0]);
1001: }
1002: }
1003: untie (%persistent_db);
1004: return 1;
1005: }
1006:
1007: ######################################################################
1008: ######################################################################
1009:
1010: =pod
1011:
1012: =item &get_persistent_data()
1013:
1014: Inputs: filename of database, ref to array of values to recover.
1015:
1016: Outputs: array of values. Returns undef on error.
1017:
1018: This function is the reverse of &make_persistent();
1019: Retrieve persistent data from %persistent_db. Retrieved items will have their
1020: values unescaped. If the item is 'domains; then the returned
1021: value will be a hash pointer. Otherwise, if the item contains
1022: commas (before unescaping), the returned value will be an array pointer.
1023:
1024: =cut
1025:
1026: ######################################################################
1027: ######################################################################
1028: sub get_persistent_data {
1029: my $filename = shift;
1030: my @Vars = @{shift()};
1031: my @Values; # Return array
1032: return undef if (! -e $filename);
1033: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1034: &GDBM_READER(),0640));
1035: foreach my $name (@Vars) {
1036: if (! exists($persistent_db{$name})) {
1037: push @Values, undef;
1038: next;
1039: }
1040: if ($name eq 'domains') {
1041: my %valueshash;
1042: my @items= map { &unescape($_); } split(',',$persistent_db{$name});
1043: foreach my $item (@items) {
1044: if ($item =~ /=/) {
1045: my ($key,$val) = map { &unescape($_); } split(/=/,$item);
1046: $valueshash{$key} = $val;
1047: }
1048: }
1049: push(@Values,\%valueshash);
1050: } else {
1051: my @values = map {
1052: &unescape($_);
1053: } split(',',$persistent_db{$name});
1054: if (@values <= 1) {
1055: push @Values,$values[0];
1056: } else {
1057: push @Values,\@values;
1058: }
1059: }
1060: }
1061: untie (%persistent_db);
1062: return @Values;
1063: }
1064:
1065: ######################################################################
1066: ######################################################################
1067:
1068: =pod
1069:
1070: =item &make_persistent()
1071:
1072: Inputs: Hash of values to save, filename of persistent database.
1073:
1074: Store variables away to the %persistent_db.
1075: Values will be escaped. Values that are array pointers will have their
1076: elements escaped and concatenated in a comma separated string. Values
1077: that are hash pointers will have their keys and values escaped and
1078: concatenated in a comma separated string.
1079:
1080: =cut
1081:
1082: ######################################################################
1083: ######################################################################
1084: sub make_persistent {
1085: my %save = %{shift()};
1086: my $filename = shift;
1087: return undef if (! tie(%persistent_db,'GDBM_File',
1088: $filename,&GDBM_WRCREAT(),0640));
1089: foreach my $name (keys(%save)) {
1090: my @values=();
1091: if (ref($save{$name}) eq 'ARRAY') {
1092: @values = @{$save{$name}};
1093: } elsif (ref($save{$name}) eq 'HASH') {
1094: foreach my $key (%{$save{$name}}) {
1095: push(@values,&escape($key).'='.&escape($save{$name}{$key}));
1096: }
1097: } else {
1098: @values = $save{$name};
1099: }
1100: # We handle array and hash references, but not recursively.
1101: my $store = join(',', map { &escape($_); } @values );
1102: $persistent_db{$name} = $store;
1103: }
1104: untie(%persistent_db);
1105: return 1;
1106: }
1107:
1108: ######################################################################
1109: ######################################################################
1110:
1111: =pod
1112:
1113: =item &make_form_data_persistent()
1114:
1115: Inputs: filename of persistent database.
1116:
1117: Store most form variables away to the %persistent_db.
1118: Values will be escaped. Values that are array pointers will have their
1119: elements escaped and concatenated in a comma separated string.
1120:
1121: =cut
1122:
1123: ######################################################################
1124: ######################################################################
1125: sub make_form_data_persistent {
1126: my $r = shift;
1127: my $filename = shift;
1128: my %save;
1129: foreach (keys(%env)) {
1130: next if (!/^form/ || /submit/);
1131: $save{$_} = $env{$_};
1132: }
1133: return &make_persistent(\%save,$filename);
1134: }
1135:
1136: ######################################################################
1137: ######################################################################
1138:
1139: =pod
1140:
1141: =item &parse_advanced_search()
1142:
1143: Parse advanced search form and return the following:
1144:
1145: =over 4
1146:
1147: =item $query Scalar containing an SQL query.
1148:
1149: =item $customquery Scalar containing a custom query.
1150:
1151: =item $customshow Scalar containing commands to show custom metadata.
1152:
1153: =item $libraries_to_query Reference to array of domains to search.
1154:
1155: =back
1156:
1157: =cut
1158:
1159: ######################################################################
1160: ######################################################################
1161: sub parse_advanced_search {
1162: my ($r,$closebutton,$hidden_fields)=@_;
1163: my @BasicFields = ('title','author','subject','keywords','url','version',
1164: 'notes','abstract','extension','owner','authorspace',
1165: # 'custommetadata','customshow',
1166: 'modifyinguser','standards','mime');
1167: my @StatsFields = &statfields();
1168: my @EvalFields = &evalfields();
1169: my $fillflag=0;
1170: my $pretty_search_string = "";
1171: # Clean up fields for safety
1172: for my $field (@BasicFields,
1173: 'creationdatestart_month','creationdatestart_day',
1174: 'creationdatestart_year','creationdateend_month',
1175: 'creationdateend_day','creationdateend_year',
1176: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1177: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1178: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1179: $env{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\'.\*]//g;
1180: }
1181: foreach ('mode','form','element') {
1182: # is this required? Hmmm.
1183: next if (! exists($env{'form.'.$_}));
1184: $env{'form.'.$_}=&unescape($env{'form.'.$_});
1185: $env{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1186: }
1187: # Preprocess the category form element.
1188: $env{'form.category'} = 'any' if (! defined($env{'form.category'}) ||
1189: ref($env{'form.category'}));
1190: #
1191: # Check to see if enough information was filled in
1192: foreach my $field (@BasicFields) {
1193: if (&filled($env{'form.'.$field})) {
1194: $fillflag++;
1195: }
1196: }
1197: foreach my $field (@StatsFields,@EvalFields) {
1198: if (&filled($env{'form.'.$field.'_max'})) {
1199: $fillflag++;
1200: }
1201: if (&filled($env{'form.'.$field.'_min'})) {
1202: $fillflag++;
1203: }
1204: }
1205:
1206: for my $field ('lowestgradelevel','highestgradelevel') {
1207: if ( $env{'form.'.$field} =~ /^\d+$/ &&
1208: $env{'form.'.$field} > 0) {
1209: $fillflag++;
1210: }
1211: }
1212: if ($env{'form.area'} eq 'portfolio') {
1213: # Added metadata fields
1214: for (my $i=0; $i<$env{'form.numaddedfields'} ; $i++) {
1215: my $field = $env{'form.addedfield_'.$i};
1216: $field =~ s/^\s*(\S*)\s*$/$1/;
1217: $field =~ s/\W/_/g;
1218: if ($field ne '') {
1219: $fillflag++;
1220: }
1221: }
1222: }
1223: if (! $fillflag) {
1224: &output_blank_field_error($r,$closebutton,
1225: 'phase=disp_adv',$hidden_fields);
1226: return ;
1227: }
1228: # Turn the form input into a SQL-based query
1229: my $query='';
1230: my @queries;
1231: my $font = '<font color="#800000" face="helvetica">';
1232: # Evaluate logical expression AND/OR/NOT phrase fields.
1233: foreach my $field (@BasicFields) {
1234: next if (!defined($env{'form.'.$field}) || $env{'form.'.$field} eq '');
1235: my ($error,$SQLQuery) =
1236: &process_phrase_input($env{'form.'.$field},
1237: $env{'form.'.$field.'_related'},$field);
1238: if (defined($error)) {
1239: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1240: $hidden_fields,$field);
1241: return;
1242: } else {
1243: $pretty_search_string .=
1244: $font.$field.'</font>: '.$env{'form.'.$field};
1245: if ($env{'form.'.$field.'_related'}) {
1246: my @Words =
1247: &Apache::loncommon::get_related_words
1248: ($env{'form.'.$field});
1249: if (@Words) {
1250: $pretty_search_string.= ' with related words: '.
1251: join(', ',@Words[0..4]);
1252: } else {
1253: $pretty_search_string.= ' with related words.';
1254: }
1255: }
1256: $pretty_search_string .= '<br />';
1257: push (@queries,$SQLQuery);
1258: }
1259: }
1260: #
1261: # Make the 'mime' from 'form.category' and 'form.extension'
1262: #
1263: my $searchphrase;
1264: if (exists($env{'form.category'}) &&
1265: $env{'form.category'} !~ /^\s*$/ &&
1266: $env{'form.category'} ne 'any') {
1267: my @extensions = &Apache::loncommon::filecategorytypes
1268: ($env{'form.category'});
1269: if (scalar(@extensions) > 0) {
1270: $searchphrase = join(' OR ',@extensions);
1271: }
1272: }
1273: if (defined($searchphrase)) {
1274: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1275: push @queries,$SQLsearch;
1276: $pretty_search_string .=$font.'mime</font> contains <b>'.
1277: $searchphrase.'</b><br />';
1278: }
1279: #
1280: # Evaluate option lists
1281: if ($env{'form.lowestgradelevel'} &&
1282: $env{'form.lowestgradelevel'} ne '0' &&
1283: $env{'form.lowestgradelevel'} =~ /^\d+$/) {
1284: push(@queries,
1285: '(lowestgradelevel>='.$env{'form.lowestgradelevel'}.')');
1286: $pretty_search_string.="lowestgradelevel>=".
1287: $env{'form.lowestgradelevel'}."<br />\n";
1288: }
1289: if ($env{'form.highestgradelevel'} &&
1290: $env{'form.highestgradelevel'} ne '0' &&
1291: $env{'form.highestgradelevel'} =~ /^\d+$/) {
1292: push(@queries,
1293: '(highestgradelevel<='.$env{'form.highestgradelevel'}.')');
1294: $pretty_search_string.="highestgradelevel<=".
1295: $env{'form.highestgradelevel'}."<br />\n";
1296: }
1297: if ($env{'form.language'} and $env{'form.language'} ne 'any') {
1298: push @queries,"(language like \"$env{'form.language'}\")";
1299: $pretty_search_string.=$font."language</font>= ".
1300: &Apache::loncommon::languagedescription($env{'form.language'}).
1301: "<br />\n";
1302: }
1303: if ($env{'form.copyright'} and $env{'form.copyright'} ne 'any') {
1304: push @queries,"(copyright like \"$env{'form.copyright'}\")";
1305: $pretty_search_string.=$font."copyright</font> = ".
1306: &Apache::loncommon::copyrightdescription($env{'form.copyright'}).
1307: "<br />\n";
1308: }
1309: if ($env{'form.area'} eq 'portfolio') {
1310: #
1311: # Added metadata fields
1312: for (my $i=0; $i<$env{'form.numaddedfields'} ; $i++) {
1313: my $field = $env{'form.addedfield_'.$i};
1314: $field =~ s/^\s*(\S*)\s*$/$1/;
1315: $field =~ s/\W/_/g;
1316: $field =~ tr/A-Z/a-z/;
1317: if ($field ne '') {
1318: my $value = $env{'form.addedvalues_'.$i};
1319: if ($value ne '') {
1320: $value =~ s/'/''/g; #' stupid emacs
1321: my ($error,$query) =
1322: &process_phrase_input($value,0,'pf.value');
1323: if (!defined($error)) {
1324: push(@queries,"pf.field = '$field' AND $query");
1325: $pretty_search_string .=
1326: $font.$field.'</font>: '.
1327: $env{'form.addedvalues_'.$i}.'<br />';
1328: }
1329: } else {
1330: push(@queries,"pf.field = '$field' AND pf.value IS NULL");
1331: }
1332: }
1333: }
1334: } else {
1335: #
1336: # Statistics
1337: foreach my $field (@StatsFields,@EvalFields) {
1338: my ($min,$max);
1339: if (exists($env{'form.'.$field.'_min'}) &&
1340: $env{'form.'.$field.'_min'} ne '') {
1341: $min = $env{'form.'.$field.'_min'};
1342: }
1343: if (exists($env{'form.'.$field.'_max'}) &&
1344: $env{'form.'.$field.'_max'} ne '') {
1345: $max = $env{'form.'.$field.'_max'};
1346: }
1347: next if (! defined($max) && ! defined($min));
1348: if (defined($min) && defined($max)) {
1349: ($min,$max) = sort {$a <=>$b} ($min,$max);
1350: }
1351: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1352: push(@queries,'('.$field.'>'.$min.')');
1353: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1354: }
1355: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1356: push(@queries,'('.$field.'<'.$max.')');
1357: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1358: }
1359: }
1360: }
1361: #
1362: # Evaluate date windows
1363: my $cafter =
1364: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1365: my $cbefore =
1366: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1367: if ($cafter > $cbefore) {
1368: my $tmp = $cafter;
1369: $cafter = $cbefore;
1370: $cbefore = $tmp;
1371: }
1372: my $mafter =
1373: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1374: my $mbefore =
1375: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1376: if ($mafter > $mbefore) {
1377: my $tmp = $mafter;
1378: $mafter = $mbefore;
1379: $mbefore = $tmp;
1380: }
1381: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1382: $mafter,$mbefore);
1383: if (defined($error)) {
1384: &output_date_error($r,$error,$closebutton,$hidden_fields);
1385: } elsif (defined($datequery)) {
1386: # Here is where you would set up pretty_search_string to output
1387: # date query information.
1388: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1389: push @queries,$datequery;
1390: }
1391: #
1392: # Process form information for custom metadata querying
1393: my $customquery=undef;
1394: ##
1395: ## The custom metadata search was removed q long time ago mostly
1396: ## because I was unable to figureout exactly how it worked and could
1397: ## not imagine people actually using it. MH
1398: ##
1399: # if ($env{'form.custommetadata'}) {
1400: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1401: # $env{'form.custommetadata'}."</b><br />\n";
1402: # $customquery=&build_custommetadata_query('custommetadata',
1403: # $env{'form.custommetadata'});
1404: # }
1405: my $customshow=undef;
1406: # if ($env{'form.customshow'}) {
1407: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1408: # $env{'form.customshow'}."</b><br />\n";
1409: # $customshow=$env{'form.customshow'};
1410: # $customshow=~s/[^\w\s]//g;
1411: # my @fields=split(/\s+/,$customshow);
1412: # $customshow=join(" ",@fields);
1413: # }
1414: ##
1415: ## Deal with restrictions to given domains
1416: ##
1417: my ($libraries_to_query,$pretty_domains_string,$domains_to_query) =
1418: &parse_domain_restrictions();
1419: if ($pretty_domains_string) {
1420: $pretty_search_string .= $pretty_domains_string."<br />\n";
1421: }
1422: #
1423: if (@queries) {
1424: if ($env{'form.area'} eq 'portfolio') {
1425: $query ="SELECT pm.*,pa.keynum,pa.scope FROM portfolio_metadata pm, portfolio_access pa, portfolio_addedfields pf WHERE (pm.url = pa.url AND pf.url = pm.url AND (pa.start < UTC_TIMESTAMP() AND (pa.end IS NULL OR pa.end > UTC_TIMESTAMP())) AND (".join(') AND (',@queries).'))';
1426: } else {
1427: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1428: }
1429: } elsif ($customquery) {
1430: $query = '';
1431: }
1432: #&Apache::lonnet::logthis('advanced query = '.$/.$query);
1433: return ($query,$customquery,$customshow,$libraries_to_query,
1434: $pretty_search_string,$domains_to_query);
1435: }
1436:
1437: sub parse_domain_restrictions {
1438: my $libraries_to_query = undef;
1439: my $domains_to_query = undef;
1440: # $env{'form.domains'} can be either a scalar or an array reference.
1441: # We need an array.
1442: if (! exists($env{'form.domains'}) || $env{'form.domains'} eq '') {
1443: return (undef,'',undef);
1444: }
1445: my @allowed_domains = &Apache::loncommon::get_env_multiple('form.domains');
1446: #
1447: my %domain_hash = ();
1448: my $pretty_domains_string;
1449: foreach (@allowed_domains) {
1450: $domain_hash{$_}++;
1451: }
1452: if ($domain_hash{'any'}) {
1453: $pretty_domains_string = &mt("in all LON-CAPA domains.");
1454: } else {
1455: if (@allowed_domains > 1) {
1456: $pretty_domains_string = &mt("in LON-CAPA domains:");
1457: } else {
1458: $pretty_domains_string = &mt("in LON-CAPA domain ");
1459: }
1460: foreach (sort @allowed_domains) {
1461: $pretty_domains_string .= "<b>".$_."</b> ";
1462: }
1463: my %library_servers = &Apache::lonnet::get_unique_servers(\@allowed_domains,
1464: 'library');
1465: my (%older_library_servers,%okdoms,%domains_for_id);
1466: map { $okdoms{$_} = 1; } @allowed_domains;
1467: foreach my $key (keys(%library_servers)) {
1468: if (&Apache::lonnet::get_server_loncaparev('',$key) =~ /^\'?(\d+)\.(\d+)/) {
1469: my $major = $1;
1470: my $minor = $2;
1471: if (($major < 2) || (($major == 2) && ($minor < 11))) {
1472: map { $older_library_servers{$_} = 1; }
1473: &Apache::lonnet::machine_ids($library_servers{$key});
1474: } else {
1475: my %possdoms;
1476: map { $possdoms{$_}=1 if ($okdoms{$_}); }
1477: &Apache::lonnet::machine_domains($library_servers{$key});
1478: $domains_for_id{$key} = join(',',sort(keys(%possdoms)));
1479: }
1480: }
1481: }
1482: my %servers = (%library_servers,%older_library_servers);
1483: $libraries_to_query = [keys(%servers)];
1484: $domains_to_query = \%domains_for_id;
1485: }
1486: return ($libraries_to_query,
1487: $pretty_domains_string,
1488: $domains_to_query);
1489: }
1490:
1491: ######################################################################
1492: ######################################################################
1493:
1494: =pod
1495:
1496: =item &parse_basic_search()
1497:
1498: Parse the basic search form and return a scalar containing an sql query.
1499:
1500: =cut
1501:
1502: ######################################################################
1503: ######################################################################
1504: sub parse_basic_search {
1505: my ($r,$closebutton)=@_;
1506: #
1507: # Clean up fields for safety
1508: for my $field ('basicexp') {
1509: $env{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-\*]//g;
1510: }
1511: foreach ('mode','form','element') {
1512: # is this required? Hmmm.
1513: next unless (exists($env{"form.$_"}));
1514: $env{"form.$_"}=&unescape($env{"form.$_"});
1515: $env{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1516: }
1517: my ($libraries_to_query,$pretty_domains_string,$domains_to_query) =
1518: &parse_domain_restrictions();
1519: #
1520: # Check to see if enough of a query is filled in
1521: my $search_string = $env{'form.basicexp'};
1522: if (! &filled($search_string)) {
1523: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1524: return OK;
1525: }
1526: my $pretty_search_string=$search_string;
1527: my @Queries;
1528: my @fields = ('title','author','subject','notes','abstract','keywords');
1529: my $searchfield;
1530: if ($env{'form.area'} eq 'portfolio') {
1531: $searchfield = 'concat_ws(" ",pm.'.join(',pm.',@fields).')';
1532: } else {
1533: $searchfield = 'concat_ws(" ",'.join(',',@fields).')';
1534: }
1535: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1536: $env{'form.related'},
1537: $searchfield);
1538: if ($error) {
1539: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1540: '','basicexp');
1541: return;
1542: }
1543: push(@Queries,$SQLQuery);
1544: #foreach my $q (@Queries) {
1545: # &Apache::lonnet::logthis(' '.$q);
1546: #}
1547: my $final_query;
1548: if ($env{'form.area'} eq 'portfolio') {
1549: $final_query = 'SELECT pm.*,pa.keynum,pa.scope FROM portfolio_metadata pm, portfolio_access pa WHERE (pm.url = pa.url AND (pa.start < UTC_TIMESTAMP() AND (pa.end IS NULL OR pa.end > UTC_TIMESTAMP())) AND '.join(" AND ",@Queries).')';
1550: } else {
1551: $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1552: }
1553: #
1554: if ($env{'form.related'}) {
1555: $pretty_search_string.=' '.&mt('(including related words)');
1556: }
1557: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1558: $pretty_search_string .= ' '.$pretty_domains_string;
1559: }
1560: $pretty_search_string .= "<br />\n";
1561: $pretty_search_string =~ s:^<br /> and ::;
1562: &Apache::lonnet::logthis('simple search final query = '.$/.$final_query);
1563: return ($final_query,$pretty_search_string,
1564: $libraries_to_query,$domains_to_query);
1565: }
1566:
1567:
1568: ###############################################################
1569: ###############################################################
1570:
1571: my @Phrases;
1572:
1573: sub concat {
1574: my ($item) = @_;
1575: my $results = '';
1576: foreach (@$item) {
1577: if (ref($_) eq 'ARRAY') {
1578: $results .= join(' ',@$_);
1579: }
1580: }
1581: return $results;
1582: }
1583:
1584: sub process_phrase_input {
1585: my ($phrase,$related,$field)=@_;
1586: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1587: my $grammar = <<'ENDGRAMMAR';
1588: searchphrase:
1589: expression /^\Z/ {
1590: # &Apache::lonsearchcat::print_item(\@item,0);
1591: [@item];
1592: }
1593: expression:
1594: phrase(s) {
1595: [@item];
1596: }
1597: phrase:
1598: orword {
1599: [@item];
1600: }
1601: | andword {
1602: [@item];
1603: }
1604: | minusword {
1605: unshift(@::Phrases,$item[1]->[0]);
1606: unshift(@::Phrases,$item[1]->[1]);
1607: [@item];
1608: }
1609: | word {
1610: unshift(@::Phrases,$item[1]);
1611: [@item];
1612: }
1613: #
1614: orword:
1615: word 'OR' phrase {
1616: unshift(@::Phrases,'OR');
1617: unshift(@::Phrases,$item[1]);
1618: [@item];
1619: }
1620: | word 'or' phrase {
1621: unshift(@::Phrases,'OR');
1622: unshift(@::Phrases,$item[1]);
1623: [@item];
1624: }
1625: | minusword 'OR' phrase {
1626: unshift(@::Phrases,'OR');
1627: unshift(@::Phrases,$item[1]->[0]);
1628: unshift(@::Phrases,$item[1]->[1]);
1629: [@item];
1630: }
1631: | minusword 'or' phrase {
1632: unshift(@::Phrases,'OR');
1633: unshift(@::Phrases,$item[1]->[0]);
1634: unshift(@::Phrases,$item[1]->[1]);
1635: [@item];
1636: }
1637: andword:
1638: word phrase {
1639: unshift(@::Phrases,'AND');
1640: unshift(@::Phrases,$item[1]);
1641: [@item];
1642: }
1643: | minusword phrase {
1644: unshift(@::Phrases,'AND');
1645: unshift(@::Phrases,$item[1]->[0]);
1646: unshift(@::Phrases,$item[1]->[1]);
1647: [@item];
1648: }
1649: #
1650: minusword:
1651: '-' word {
1652: [$item[2],'NOT'];
1653: }
1654: word:
1655: "'" term(s) "'" {
1656: &Apache::lonsearchcat::concat(\@item);
1657: }
1658: | '"' term(s) '"' {
1659: &Apache::lonsearchcat::concat(\@item);
1660: }
1661: | term {
1662: $item[1];
1663: }
1664: term:
1665: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E\-]+/ {
1666: $item[1];
1667: }
1668: ENDGRAMMAR
1669: #
1670: # The end result of parsing the phrase with the grammar is an array
1671: # @::Phrases.
1672: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1673: # $phrase = "genetic engineering" -dna ->
1674: # "genetic engineering","AND","NOT","dna"
1675: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1676: undef(@::Phrases);
1677: my $p = new Parse::RecDescent($grammar);
1678: if (! defined($p->searchphrase($phrase))) {
1679: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1680: return 'Unable to process phrase '.$phrase;
1681: }
1682: #
1683: # Go through the phrases and make sense of them.
1684: # Apply modifiers NOT OR and AND to the phrases.
1685: my @NewPhrases;
1686: while(@::Phrases) {
1687: my $phrase = shift(@::Phrases);
1688: # &Apache::lonnet::logthis('phrase = '.$phrase);
1689: my $phrasedata;
1690: if ($phrase =~ /^(NOT|OR|AND)$/) {
1691: if ($phrase eq 'OR') {
1692: $phrasedata->{'or'}++;
1693: if (! @::Phrases) { $phrasedata = undef; last; }
1694: $phrase = shift(@::Phrases);
1695: } elsif ($phrase eq 'AND') {
1696: $phrasedata->{'and'}++;
1697: if (! @::Phrases) { $phrasedata = undef; last; }
1698: $phrase = shift(@::Phrases);
1699: }
1700: if ($phrase eq 'NOT') {
1701: $phrasedata->{'negate'}++;
1702: if (! @::Phrases) { $phrasedata = undef; last; }
1703: $phrase = shift(@::Phrases);
1704: }
1705: }
1706: $phrasedata->{'phrase'} = $phrase;
1707: if ($related) {
1708: my @NewWords;
1709: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1710: $phrasedata->{'related_words'} = \@NewWords;
1711: }
1712: push(@NewPhrases,$phrasedata);
1713: }
1714: #
1715: # Actually build the sql query from the phrases
1716: my $SQLQuery;
1717: foreach my $phrase (@NewPhrases) {
1718: my $query;
1719: if ($phrase->{'negate'}) {
1720: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1721: } else {
1722: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1723: }
1724: foreach my $related (@{$phrase->{'related_words'}}) {
1725: if ($phrase->{'negate'}) {
1726: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1727: } else {
1728: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1729: }
1730: }
1731: if ($SQLQuery) {
1732: if ($phrase->{'or'}) {
1733: $SQLQuery .= ' OR ('.$query.')';
1734: } else {
1735: $SQLQuery .= ' AND ('.$query.')';
1736: }
1737: } else {
1738: $SQLQuery = '('.$query.')';
1739: }
1740: }
1741: #
1742: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1743: #
1744: return undef,$SQLQuery;
1745: }
1746:
1747: ######################################################################
1748: ######################################################################
1749:
1750: =pod
1751:
1752: =item &related_version()
1753:
1754: Modifies an input string to include related words. Words in the string
1755: are replaced with parenthesized lists of 'OR'd words. For example
1756: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1757:
1758: Note: Using this twice on a string is probably silly.
1759:
1760: =cut
1761:
1762: ######################################################################
1763: ######################################################################
1764: sub related_version {
1765: my ($word) = @_;
1766: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1767: my @Words = &Apache::loncommon::get_related_words($word);
1768: # Only use 4 related words
1769: @Words = ($#Words>4? @Words[0..4] : @Words);
1770: my $result = join " OR ", ($word,@Words);
1771: return $result,sort(@Words);
1772: }
1773:
1774:
1775: ######################################################################
1776: ######################################################################
1777:
1778: =pod
1779:
1780: =item &build_custommetadata_query()
1781:
1782: Constructs a custom metadata query using a rather heinous regular
1783: expression.
1784:
1785: =cut
1786:
1787: ######################################################################
1788: ######################################################################
1789: sub build_custommetadata_query {
1790: my ($field_name,$logic_statement)=@_;
1791: my $q=new Text::Query('abc',
1792: -parse => 'Text::Query::ParseAdvanced',
1793: -build => 'Text::Query::BuildAdvancedString');
1794: $q->prepare($logic_statement);
1795: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1796: # quick fix to change literal into xml tag-matching
1797: # will eventually have to write a separate builder module
1798: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1799: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1800: /\\<$1\\>?# \<wordone\>
1801: \[\^\\<\]?# [^\<]
1802: \*$2\[\^\\<\]?# *wordtwo[^\<]
1803: \*\\<\\\/$1\\>?# *\<\/wordone\>
1804: /g;
1805: return $matchexp;
1806: }
1807:
1808:
1809: ######################################################################
1810: ######################################################################
1811:
1812: =pod
1813:
1814: =item &build_date_queries()
1815:
1816: Builds a SQL logic query to check time/date entries.
1817: Also reports errors (check for /^Incorrect/).
1818:
1819: =cut
1820:
1821: ######################################################################
1822: ######################################################################
1823: sub build_date_queries {
1824: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1825: my ($result,$error,$pretty_string);
1826: #
1827: # Verify the input
1828: if (! defined($cafter) && ! defined($cbefore) &&
1829: ! defined($mafter) && ! defined($mbefore)) {
1830: # This is an okay situation, so return undef for the error
1831: return (undef,undef,undef);
1832: }
1833: if ((defined($cafter) && ! defined($cbefore)) ||
1834: (defined($cbefore) && ! defined($cafter))) {
1835: # This is bad, so let them know
1836: $error = &mt('Incorrect entry for the creation date. '.
1837: 'You must specify both the beginning and ending dates.');
1838: }
1839: if (! defined($error) &&
1840: ((defined($mafter) && ! defined($mbefore)) ||
1841: (defined($mbefore) && ! defined($mafter)))) {
1842: # This is also bad, so let them know
1843: $error = &mt('Incorrect entry for the last revision date. '.
1844: 'You must specify both the beginning and ending dates.');
1845: }
1846: if (! defined($error)) {
1847: #
1848: # Build the queries
1849: my @queries;
1850: if (defined($cbefore) && defined($cafter)) {
1851: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1852: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1853: # Correct for year being relative to 1900
1854: $cayear+=1900; $cbyear+=1900;
1855: my $cquery=
1856: '(creationdate BETWEEN '.
1857: "'".$cayear.'-'.$camon.'-'.$caday."'".
1858: ' AND '.
1859: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1860: $pretty_string .= '<br />' if (defined($pretty_string));
1861: $pretty_string .=
1862: &mt('created between [_1] and [_2]',
1863: &Apache::lonlocal::locallocaltime($cafter),
1864: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1865: push(@queries,$cquery);
1866: $pretty_string =~ s/ 00:00:00//g;
1867: }
1868: if (defined($mbefore) && defined($mafter)) {
1869: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1870: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1871: # Correct for year being relative to 1900
1872: $mayear+=1900; $mbyear+=1900;
1873: my $mquery=
1874: '(lastrevisiondate BETWEEN '.
1875: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1876: ' AND '.
1877: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1878: push(@queries,$mquery);
1879: $pretty_string .= '<br />' if (defined($pretty_string));
1880: $pretty_string .=
1881: &mt('last revised between [_1] and [_2]',
1882: &Apache::lonlocal::locallocaltime($mafter),
1883: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1884: $pretty_string =~ s/ 00:00:00//g;
1885: }
1886: if (@queries) {
1887: $result .= join(" AND ",@queries);
1888: }
1889: }
1890: return ($result,$error,$pretty_string);
1891: }
1892:
1893: ######################################################################
1894: ######################################################################
1895:
1896: =pod
1897:
1898: =item ©right_check()
1899:
1900: Inputs: $Metadata, a hash pointer of metadata for a resource.
1901:
1902: Returns: 1 if the resource is available to the user making the query,
1903: 0 otherwise.
1904:
1905: =cut
1906:
1907: ######################################################################
1908: ######################################################################
1909: sub copyright_check {
1910: my $Metadata = shift;
1911: # Check copyright tags and skip results the user cannot use
1912: my (undef,undef,$resdom,$resname) = split('/',
1913: $Metadata->{'url'});
1914: # Check for priv
1915: if (($Metadata->{'copyright'} eq 'priv') &&
1916: (($env{'user.name'} ne $resname) &&
1917: ($env{'user.domain'} ne $resdom))) {
1918: return 0;
1919: }
1920: # Check for domain
1921: if (($Metadata->{'copyright'} eq 'domain') &&
1922: ($env{'user.domain'} ne $resdom)) {
1923: return 0;
1924: }
1925: # Check for custom rights
1926: if ($Metadata->{'copyright'} eq 'custom') {
1927: return &Apache::lonnet::customaccess('bre',$Metadata->{'url'});
1928: }
1929: return 1;
1930: }
1931:
1932: ######################################################################
1933: ######################################################################
1934:
1935: =pod
1936:
1937: =item &ensure_db_and_table()
1938:
1939: Ensure we can get lonmysql to connect to the database and the table we
1940: need exists.
1941:
1942: Inputs: $r, table id
1943:
1944: Returns: undef on error, 1 if the table exists.
1945:
1946: =cut
1947:
1948: ######################################################################
1949: ######################################################################
1950: sub ensure_db_and_table {
1951: my ($r,$table) = @_;
1952: ##
1953: ## Sanity check the table id.
1954: ##
1955: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1956: $r->print(&Apache::loncommon::start_page('Error')
1957: .'<p class="LC_error">'
1958: .&mt('Unable to retrieve search results. '
1959: .'Unable to determine the table results were saved in.')
1960: .'</p>'
1961: . '<p>'.&mt('Internal info:').'</p>'
1962: .'<pre>'.$table.'</pre>'
1963: .&Apache::loncommon::end_page()
1964: );
1965: return undef;
1966: }
1967: ##
1968: ## Make sure we can connect and the table exists.
1969: ##
1970: my $connection_result = &Apache::lonmysql::connect_to_db();
1971: if (!defined($connection_result)) {
1972: $r->print(
1973: '<p class="LC_error">'
1974: .&mt('Unable to connect to the MySQL database where your results are saved.')
1975: .'</p>'
1976: .&Apache::loncommon::end_page()
1977: );
1978: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1979: " connect to database.");
1980: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1981: return undef;
1982: }
1983: my $table_check = &Apache::lonmysql::check_table($table);
1984: if (! defined($table_check)) {
1985: $r->print(
1986: '<p class="LC_error">'
1987: .&mt('A MySQL error has occurred.')
1988: .'</p></form>'
1989: .&Apache::loncommon::end_page());
1990: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1991: " of table ".$table);
1992: return undef;
1993: } elsif (! $table_check) {
1994: $r->print(
1995: '<p class="LC_error">'
1996: .&mt('The table of results could not be found.')
1997: .'</p>'
1998: );
1999: &Apache::lonnet::logthis("The user requested a table, ".$table.
2000: ", that could not be found.");
2001: return undef;
2002: }
2003: return 1;
2004: }
2005:
2006: ######################################################################
2007: ######################################################################
2008:
2009: =pod
2010:
2011: =item &print_sort_form()
2012:
2013: The sort feature is not implemented at this time. This form just prints
2014: a link to change the search query.
2015:
2016: =cut
2017:
2018: ######################################################################
2019: ######################################################################
2020: sub print_sort_form {
2021: my ($r,$pretty_query_string) = @_;
2022:
2023: ##
2024: my %SortableFields=&Apache::lonlocal::texthash(
2025: id => 'Default',
2026: title => 'Title',
2027: author => 'Author',
2028: subject => 'Subject',
2029: url => 'URL',
2030: version => 'Version Number',
2031: mime => 'Mime type',
2032: lang => 'Language',
2033: owner => 'Owner/Publisher',
2034: copyright => 'Copyright',
2035: hostname => 'Host',
2036: creationdate => 'Creation Date',
2037: lastrevisiondate => 'Revision Date'
2038: );
2039: ##
2040: my $table = $env{'form.table'};
2041: return if (! &ensure_db_and_table($r,$table));
2042: ##
2043: ## Get the number of results
2044: ##
2045: my $total_results = &Apache::lonmysql::number_of_rows($table);
2046: if (! defined($total_results)) {
2047: $r->print("A MySQL error has occurred.</form>".
2048: &Apache::loncommon::end_page());
2049: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2050: " of rows in table ".$table);
2051: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2052: return;
2053: }
2054: # update results
2055: my $newloc = '/adm/searchcat?phase=results&persistent_db_id='.
2056: $env{'form.persistent_db_id'};
2057: my $js =<<END;
2058: <script type="text/javascript">
2059: var frame = parent.resultsframe;
2060: var frameDoc = frame.document;
2061: if (frameDoc.readyState == 'complete')
2062: frame.location = "$newloc";
2063: </script>
2064: END
2065:
2066: my $start_page = &Apache::loncommon::start_page('Results',$js);
2067: my $breadcrumbs=
2068: &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching',
2069: $env{'form.catalogmode'} ne 'import');
2070:
2071: my $result = <<END;
2072: $start_page
2073: $breadcrumbs
2074: <form name="statusform" action="" method="post" target="_top">
2075: <input type="hidden" name="catalogmode" value="import" />
2076: <input type="hidden" name="acts" value="" />
2077: END
2078:
2079: #<h2>Sort Results</h2>
2080: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2081: # $env{'form.sortby'} = 'id' if (! defined($env{'form.sortby'}));
2082: # foreach (keys(%SortableFields)) {
2083: # $result.="<option name=\"$_\"";
2084: # if ($_ eq $env{'form.sortby'}) {
2085: # $result.=" selected ";
2086: # }
2087: # $result.=" >$SortableFields{$_}</option>\n";
2088: # }
2089: # $result.="</select>\n";
2090: my $revise = &revise_button();
2091: $result.='<p>'
2092: .&mt('Total of [quant,_1,match,matches] to your query.',$total_results)
2093: .' '.$revise.'</p>'
2094: .'<p>'.&mt('Search: ').$pretty_query_string
2095: .'</p></form>';
2096: $r->print($result.&Apache::loncommon::end_page());
2097: return;
2098: }
2099:
2100: #####################################################################
2101: #####################################################################
2102:
2103: =pod
2104:
2105: =item MySQL Table Description
2106:
2107: MySQL table creation requires a precise description of the data to be
2108: stored. The use of the correct types to hold data is vital to efficient
2109: storage and quick retrieval of records. The columns must be described in
2110: the following format:
2111:
2112: =cut
2113:
2114: #####################################################################
2115: #####################################################################
2116: #
2117: # These should probably be scoped but I don't have time right now...
2118: #
2119: my @Datatypes;
2120: my @Fullindicies;
2121:
2122: ######################################################################
2123: ######################################################################
2124:
2125: =pod
2126:
2127: =item &create_results_table()
2128:
2129: Creates the table of search results by calling lonmysql. Stores the
2130: table id in $env{'form.table'}
2131:
2132: Inputs: search area - either res or portfolio
2133:
2134: Returns: the identifier of the table on success, undef on error.
2135:
2136: =cut
2137:
2138: ######################################################################
2139: ######################################################################
2140: sub set_up_table_structure {
2141: my ($tabletype) = @_;
2142: my ($datatypes,$fullindicies) =
2143: &LONCAPA::lonmetadata::describe_metadata_storage($tabletype);
2144: # Copy the table description before modifying it...
2145: @Datatypes = @{$datatypes};
2146: unshift(@Datatypes,{name => 'id',
2147: type => 'MEDIUMINT',
2148: restrictions => 'UNSIGNED NOT NULL',
2149: primary_key => 'yes',
2150: auto_inc => 'yes' });
2151: @Fullindicies = @{$fullindicies};
2152: return;
2153: }
2154:
2155: sub create_results_table {
2156: my ($area) = @_;
2157: if ($area eq 'portfolio') {
2158: &set_up_table_structure('portfolio_search');
2159: } else {
2160: &set_up_table_structure('metadata');
2161: }
2162: my $table = &Apache::lonmysql::create_table
2163: ( { columns => \@Datatypes,
2164: FULLTEXT => [{'columns' => \@Fullindicies},],
2165: } );
2166: if (defined($table)) {
2167: $env{'form.table'} = $table;
2168: return $table;
2169: }
2170: return undef; # Error...
2171: }
2172:
2173: ######################################################################
2174: ######################################################################
2175:
2176: =pod
2177:
2178: =item Search Status update functions
2179:
2180: Each of the following functions changes the values of one of the
2181: input fields used to display the search status to the user. The names
2182: should be explanatory.
2183:
2184: Inputs: Apache request handler ($r), text to display.
2185:
2186: Returns: Nothing.
2187:
2188: =over 4
2189:
2190: =item &update_count_status()
2191:
2192: =item &update_status()
2193:
2194: =item &update_seconds()
2195:
2196: =back
2197:
2198: =cut
2199:
2200: ######################################################################
2201: ######################################################################
2202: sub update_count_status {
2203: my ($r,$text) = @_;
2204: $text =~ s/\'/\\\'/g;
2205: $r->print(<<SCRIPT);
2206: <script type="text/javascript">
2207: // <![CDATA[
2208: document.statusform.count.value = ' $text'
2209: // ]]>
2210: </script>
2211: SCRIPT
2212:
2213: $r->rflush();
2214: }
2215:
2216: sub update_status {
2217: my ($r,$text) = @_;
2218: $text =~ s/\'/\\\'/g;
2219: $r->print(<<SCRIPT);
2220: <script type="text/javascript">
2221: // <![CDATA[
2222: document.statusform.status.value = ' $text'
2223: // ]]>
2224: </script>
2225: SCRIPT
2226:
2227: $r->rflush();
2228: }
2229:
2230: sub reload_result_frame {
2231: my ($r) = @_;
2232: my $newloc = '/adm/searchcat?phase=results&persistent_db_id='.
2233: $env{'form.persistent_db_id'};
2234: $r->print(<<SCRIPT);
2235: <script type="text/javascript">
2236: var frame = parent.resultsframe;
2237: var frameDoc = frame.document;
2238: if (frameDoc.readyState == 'complete')
2239: frame.location = "$newloc";
2240: </script>
2241: SCRIPT
2242:
2243: $r->rflush();
2244: }
2245:
2246: {
2247: my $max_time = 60; # seconds for the search to complete
2248: my $start_time = 0;
2249: my $last_time = 0;
2250:
2251: sub reset_timing {
2252: $start_time = 0;
2253: $last_time = 0;
2254: }
2255:
2256: sub time_left {
2257: if ($start_time == 0) {
2258: $start_time = time;
2259: }
2260: my $time_left = $max_time - (time - $start_time);
2261: $time_left = 0 if ($time_left < 0);
2262: return $time_left;
2263: }
2264:
2265: sub update_seconds {
2266: my ($r) = @_;
2267: my $time = &time_left();
2268: if (($last_time-$time) > 0) {
2269: $r->print(<<SCRIPT);
2270: <script type="text/javascript">
2271: // <![CDATA[
2272: document.statusform.seconds.value = '$time'
2273: // ]]>
2274: </script>
2275: SCRIPT
2276:
2277: $r->rflush();
2278: }
2279: $last_time = $time;
2280: }
2281:
2282: }
2283:
2284: ######################################################################
2285: ######################################################################
2286:
2287: =pod
2288:
2289: =item &revise_button()
2290:
2291: Inputs: None
2292:
2293: Returns: html string for a 'revise search' button.
2294:
2295: =cut
2296:
2297: ######################################################################
2298: ######################################################################
2299: sub revise_button {
2300: my $revisetext = &mt('Revise search');
2301: my $revise_phase = 'disp_basic';
2302: $revise_phase = 'disp_adv' if ($env{'form.searchmode'} eq 'advanced');
2303: my $newloc = '/adm/searchcat'.
2304: '?persistent_db_id='.$env{'form.persistent_db_id'}.
2305: '&cleargroupsort=1'.
2306: '&phase='.$revise_phase;
2307: my $result = qq{<input type="button" value="$revisetext" name="revise"} .
2308: qq{ onclick="parent.location='$newloc';" /> };
2309: return $result;
2310: }
2311:
2312: ######################################################################
2313: ######################################################################
2314:
2315: =pod
2316:
2317: =item &run_search()
2318:
2319: Executes a search query by sending it the the other servers and putting the
2320: results into MySQL.
2321:
2322: =cut
2323:
2324: ######################################################################
2325: ######################################################################
2326: sub run_search {
2327: my ($r,$query,$customquery,$customshow,$serverlist,
2328: $pretty_string,$area,$domainsref) = @_;
2329: my $tabletype = 'metadata';
2330: if ($area eq 'portfolio') {
2331: $tabletype = 'portfolio_search';
2332: }
2333: my $connection = $r->connection;
2334: #
2335: # Print run_search header
2336: #
2337: my $start_page = &Apache::loncommon::start_page('Search Status',undef);
2338: my $breadcrumbs =
2339: &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching',
2340: $env{'form.catalogmode'} ne 'import');
2341: $r->print(<<END);
2342: $start_page
2343: $breadcrumbs
2344: END
2345: # Remove leading and trailing <br />
2346: $pretty_string =~ s:^\s*<br />::i;
2347: $pretty_string =~ s:(<br />)*\s*$::im;
2348: my @Lines = split("<br />",$pretty_string);
2349: # I keep getting blank items at the end of the list, hence the following:
2350: while ($Lines[-1] =~ /^\s*$/ && @Lines) {
2351: pop(@Lines);
2352: }
2353: if (@Lines > 2) {
2354: $pretty_string = join '<br />',(@Lines[0..2],'...<br />');
2355: }
2356: $r->print(&mt("Search: [_1]",$pretty_string));
2357: $r->rflush();
2358: #
2359: # Determine the servers we need to contact.
2360: my (@Servers_to_contact,%domains_by_server);
2361: if (defined($serverlist)) {
2362: if (ref($serverlist) eq 'ARRAY') {
2363: @Servers_to_contact = @$serverlist;
2364: } else {
2365: @Servers_to_contact = ($serverlist);
2366: }
2367: if (ref($domainsref) eq 'HASH') {
2368: foreach my $server (@Servers_to_contact) {
2369: $domains_by_server{$server} = $domainsref->{$server};
2370: }
2371: }
2372: } else {
2373: my %library_servers = &Apache::lonnet::unique_library();
2374: my (%all_library_servers, %older_library_servers);
2375: foreach my $key (keys(%library_servers)) {
2376: if (&Apache::lonnet::get_server_loncaparev('',$key) =~ /^\'?(\d+)\.(\d+)/) {
2377: my $major = $1;
2378: my $minor = $2;
2379: if (($major < 2) || (($major == 2) && ($minor < 11))) {
2380: map { $older_library_servers{$_} = 1; }
2381: &Apache::lonnet::machine_ids($library_servers{$key});
2382: }
2383: }
2384: }
2385: %all_library_servers = (%library_servers,%older_library_servers);
2386: @Servers_to_contact = sort(keys(%all_library_servers));
2387: foreach my $server (@Servers_to_contact) {
2388: my %possdoms;
2389: map { $possdoms{$_}=1; } &Apache::lonnet::machine_domains($all_library_servers{$server});
2390: $domains_by_server{$server} =
2391: join(',',sort(&Apache::lonnet::machine_domains($all_library_servers{$server})));
2392: }
2393: }
2394: my %Server_status;
2395: #
2396: # Check on the mysql table we will use to store results.
2397: my $table =$env{'form.table'};
2398: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2399: $r->print("Unable to determine table id to save search results in.".
2400: "The search has been aborted.".
2401: &Apache::loncommon::end_page());
2402: return;
2403: }
2404: my $table_status = &Apache::lonmysql::check_table($table);
2405: if (! defined($table_status)) {
2406: $r->print("Unable to determine status of table.".
2407: &Apache::loncommon::end_page());
2408: &Apache::lonnet::logthis("Bogus table id of $table for ".
2409: "$env{'user.name'} @ $env{'user.domain'}");
2410: &Apache::lonnet::logthis("lonmysql error = ".
2411: &Apache::lonmysql::get_error());
2412: return;
2413: }
2414: if (! $table_status) {
2415: &Apache::lonnet::logthis("lonmysql error = ".
2416: &Apache::lonmysql::get_error());
2417: &Apache::lonnet::logthis("lonmysql debug = ".
2418: &Apache::lonmysql::get_debug());
2419: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2420: $r->print("The table id,$table, we tried to use is invalid.".
2421: "The search has been aborted.".
2422: &Apache::loncommon::end_page());
2423: return;
2424: }
2425: ##
2426: ## Prepare for the big loop.
2427: my $hitcountsum;
2428: my $oldhitcountsum;
2429: my %matches;
2430: my $server;
2431: my $status;
2432: my $revise = &revise_button();
2433: $r->print('<form name="statusform" action="" method="post">'."\n".
2434: '<input type="hidden" name="acts" value="" />'."\n".
2435: '<table border="0"><tr><td>'."\n".
2436: &Apache::loncommon::start_data_table());
2437: $r->print(&Apache::loncommon::start_data_table_header_row()
2438: .'<th>'.&mt('Status').'</th>'
2439: .'<th>'.&mt('Total Matches').'</th>'
2440: .'<th>'.&mt('Time Remaining').'</th>'
2441: .&Apache::loncommon::end_data_table_header_row()
2442: .&Apache::loncommon::start_data_table_row()
2443: .'<td><input type="text" name="status" value="" size="50" readonly="readonly" /></td>'
2444: .'<td><input type="text" name="count" value="" size="10" readonly="readonly" /></td>'
2445: .'<td><input type="text" name="seconds" value="" size="8" readonly="readonly" /></td>'
2446: .&Apache::loncommon::end_data_table_row()
2447: .&Apache::loncommon::end_data_table()
2448: .'</td><td> </td><td>'.$revise.'</td></tr></table></form>');
2449: $r->rflush();
2450: &reset_timing();
2451: &update_seconds($r);
2452: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2453: while (&time_left() &&
2454: ((@Servers_to_contact) || keys(%Server_status))) {
2455: &update_seconds($r);
2456: #
2457: # Send out a search request
2458: if (@Servers_to_contact) {
2459: # Contact one server
2460: my $server = shift(@Servers_to_contact);
2461: &update_status($r,&mt('contacting [_1]',$server));
2462: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2463: $customshow,[$server],\%domains_by_server);
2464: ($server) = keys(%$reply);
2465: $Server_status{$server} = $reply->{$server};
2466: } else {
2467: # wait a sec. to give time for files to be written
2468: # This sleep statement is here instead of outside the else
2469: # block because we do not want to pause if we have servers
2470: # left to contact.
2471: if (scalar (keys(%Server_status))) {
2472: &update_status($r,
2473: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2474: }
2475: Time::HiRes::sleep(0.1);
2476: }
2477: #
2478: # Loop through the servers we have contacted but do not
2479: # have results from yet, looking for results.
2480: foreach my $server (keys(%Server_status)) {
2481: last if ($connection->aborted());
2482: &update_seconds($r);
2483: my $status = $Server_status{$server};
2484: if ($status eq 'con_lost') {
2485: delete ($Server_status{$server});
2486: next;
2487: }
2488: $status=~s|/||g;
2489:
2490:
2491:
2492: my $datafile=LONCAPA::tempdir().$status;
2493: if (-e $datafile && ! -e "$datafile.end") {
2494: &update_status($r,&mt('Receiving results from [_1]',$server));
2495: next;
2496: }
2497: last if ($connection->aborted());
2498: if (-e "$datafile.end") {
2499: &update_status($r,&mt('Reading results from [_1]',$server));
2500: if (-z "$datafile") {
2501: delete($Server_status{$server});
2502: next;
2503: }
2504: my $fh;
2505: if (!($fh=Apache::File->new($datafile))) {
2506: $r->print("Unable to open search results file for ".
2507: "server $server. Omitting from search");
2508: delete($Server_status{$server});
2509: next;
2510: }
2511: # Read in the whole file.
2512: while (my $result = <$fh>) {
2513: last if ($connection->aborted());
2514: #
2515: # Records are stored one per line
2516: chomp($result);
2517: next if (! $result);
2518: #
2519: # Parse the result.
2520: my %Fields = &parse_raw_result($result,$server,$tabletype);
2521: $Fields{'hostname'} = $server;
2522: #
2523: # Skip based on copyright
2524: next if (! ©right_check(\%Fields));
2525:
2526: if ($area eq 'portfolio') {
2527: next if (defined($matches{$Fields{'url'}}));
2528: # Skip if inaccessible
2529: next if (!&Apache::lonnet::portfolio_access($Fields{'url'}));
2530: $matches{$Fields{'url'}} = 1;
2531: }
2532: #
2533: # Store the result in the mysql database
2534: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2535: if (! defined($result)) {
2536: $r->print(&Apache::lonmysql::get_error());
2537: }
2538: #
2539: $hitcountsum ++;
2540: &update_seconds($r);
2541: if ($hitcountsum % 50 == 0) {
2542: &update_count_status($r,$hitcountsum);
2543: }
2544: }
2545: $fh->close();
2546: # $server is only deleted if the results file has been
2547: # found and (successfully) opened. This may be a bad idea.
2548: delete($Server_status{$server});
2549: }
2550: last if ($connection->aborted());
2551: if ($oldhitcountsum < $hitcountsum) {
2552: &update_count_status($r,$hitcountsum);
2553: if ($hitcountsum <= $env{'form.show'}) {
2554: reload_result_frame($r);
2555: }
2556: $oldhitcountsum = $hitcountsum;
2557: }
2558: }
2559: last if ($connection->aborted());
2560: &update_seconds($r);
2561: }
2562: &update_status($r,&mt('Search Complete on Server [_1]',$server));
2563: &update_seconds($r);
2564: #
2565: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2566: #
2567: # We have run out of time or run out of servers to talk to and
2568: # results to get, so let the client know the top frame needs to be
2569: # loaded from /adm/searchcat
2570: $r->print(&Apache::loncommon::end_page());
2571: # if ($env{'form.catalogmode'} ne 'import') {
2572: $r->print(<<SCRIPT);
2573: <script>
2574: window.location='/adm/searchcat?phase=sort&persistent_db_id=$env{'form.persistent_db_id'}';
2575: </script>
2576: SCRIPT
2577: # }
2578: return;
2579: }
2580:
2581: ######################################################################
2582: ######################################################################
2583:
2584: =pod
2585:
2586: =item &prev_next_buttons()
2587:
2588: Returns html for the previous and next buttons on the search results page.
2589:
2590: =cut
2591:
2592: ######################################################################
2593: ######################################################################
2594: sub prev_next_buttons {
2595: my ($current_min,$show,$total,$parms) = @_;
2596: return '' if ($show eq 'all'); # No links if you get them all at once.
2597: #
2598: # Create buttons
2599: return '<p class="LC_nobreak">'
2600: .'<input type="submit" name="prev" value="<"'
2601: .' title="'.&mt('Previous').'" />'
2602: .' '
2603: .'<input type="submit" name="reload" value="'.&mt('Reload').'" />'
2604: .' '
2605: .'<input type="submit" name="next" value=">"'
2606: .' title="'.&mt('Next').'" />'
2607: .'</p>';
2608: }
2609:
2610: ######################################################################
2611: ######################################################################
2612:
2613: =pod
2614:
2615: =item &display_results()
2616:
2617: Prints the results out for selection and perusal.
2618:
2619: =cut
2620:
2621: ######################################################################
2622: ######################################################################
2623: sub display_results {
2624: my ($r,$importbutton,$closebutton,$diropendb,$area) = @_;
2625: my $connection = $r->connection;
2626: $r->print(&search_results_header($importbutton,$closebutton));
2627: ##
2628: ## Set viewing function
2629: ##
2630: my $viewfunction = $Views{$env{'form.viewselect'}};
2631: if (!defined($viewfunction)) {
2632: $r->print('<p class="LC_error">'
2633: .&mt('Internal Error - Bad view selected.')
2634: .'</p>'."\n");
2635: $r->rflush();
2636: return;
2637: }
2638: ##
2639: ## $checkbox_num is a count of the number of checkboxes output on the
2640: ## page this is used only during catalogmode=import.
2641: my $checkbox_num = 0;
2642: ##
2643: ## Get the catalog controls setup
2644: ##
2645: my $action = "/adm/searchcat?phase=results";
2646: ##
2647: ## Deal with import by opening the import db file.
2648: if ($env{'form.catalogmode'} eq 'import') {
2649: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2650: &GDBM_WRCREAT(),0640)) {
2651: # NOTE: this can happen when a previous request to searchcat?phase=results gets interrupted
2652: # (%groupsearch_db is not untied)
2653: $r->print('<p class="LC_error">'.
2654: &mt('Unable to save import results.').
2655: '</p>'.
2656: '</form>'.
2657: &Apache::loncommon::end_page());
2658: $r->rflush();
2659: return;
2660: }
2661: # untie %groupsearch_db if the connection gets aborted before the end
2662: $r->register_cleanup(sub {
2663: untie %groupsearch_db if (tied(%groupsearch_db));
2664: });
2665: }
2666: ##
2667: ## Prepare the table for querying
2668: my $table = $env{'form.table'};
2669: return if (! &ensure_db_and_table($r,$table));
2670: ##
2671: ## Get the number of results
2672: my $total_results = &Apache::lonmysql::number_of_rows($table);
2673: if (! defined($total_results)) {
2674: $r->print('<p class="LC_error">'.
2675: &mt('A MySQL error has occurred.').
2676: '</p>'.
2677: '</form>'.
2678: &Apache::loncommon::end_page());
2679: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2680: " of rows in table ".$table);
2681: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2682: return;
2683: }
2684: ##
2685: ## Determine how many results we need to get
2686: $env{'form.start'} = 1 if (! exists($env{'form.start'}));
2687: $env{'form.show'} = 20 if (! exists($env{'form.show'}));
2688: if (exists($env{'form.prev'})) {
2689: $env{'form.start'} -= $env{'form.show'};
2690: } elsif (exists($env{'form.next'})) {
2691: $env{'form.start'} += $env{'form.show'};
2692: }
2693: $env{'form.start'} = 1 if ($env{'form.start'}<1);
2694: $env{'form.start'} = $total_results if ($env{'form.start'}>$total_results);
2695: my $min = $env{'form.start'};
2696: my $max;
2697: if ($env{'form.show'} eq 'all') {
2698: $max = $total_results ;
2699: } else {
2700: $max = $min + $env{'form.show'} - 1;
2701: $max = $total_results if ($max > $total_results);
2702: }
2703: ##
2704: ## Output form elements
2705: $r->print(&hidden_field('table').
2706: &hidden_field('phase').
2707: &hidden_field('persistent_db_id').
2708: &hidden_field('start').
2709: &hidden_field('area')
2710: );
2711: #
2712: # Build sorting selector
2713: my @fields =
2714: (
2715: {key=>'default' },
2716: {key=>'title' },
2717: {key =>'author' },
2718: {key =>'subject'},
2719: {key =>'url',desc=>'URL'},
2720: {key =>'keywords'},
2721: {key =>'language'},
2722: {key =>'creationdate'},
2723: {key =>'lastrevisiondate'},
2724: {key =>'owner'},
2725: {key =>'copyright'},
2726: {key =>'authorspace'},
2727: {key =>'lowestgradelevel'},
2728: {key =>'highestgradelevel'},
2729: {key =>'standards',desc=>'Standards'},
2730: );
2731: if ($area eq 'portfolio') {
2732: push(@fields,
2733: (
2734: {key => 'scope'},
2735: {key => 'keynum'},
2736: ));
2737: } else {
2738: push(@fields,
2739: (
2740: {key =>'count',desc=>'Number of accesses'},
2741: {key =>'stdno',desc=>'Students Attempting'},
2742: {key =>'avetries',desc=>'Average Number of Tries'},
2743: {key =>'difficulty',desc=>'Mean Degree of Difficulty'},
2744: {key =>'disc',desc=>'Mean Degree of Discrimination'},
2745: {key =>'clear',desc=>'Evaluation: Clear'},
2746: {key =>'technical',desc=>'Evaluation: Technically Correct'},
2747: {key =>'correct',desc=>'Evaluation: Material is Correct'},
2748: {key =>'helpful',desc=>'Evaluation: Material is Helpful'},
2749: {key =>'depth',desc=>'Evaluation: Material has Depth'},
2750: ));
2751: }
2752: my %fieldnames = &Apache::lonmeta::fieldnames();
2753: my @field_order;
2754: foreach my $field_data (@fields) {
2755: push(@field_order,$field_data->{'key'});
2756: if (! exists($field_data->{'desc'})) {
2757: $field_data->{'desc'}=$fieldnames{$field_data->{'key'}};
2758: } else {
2759: if (! defined($field_data->{'desc'})) {
2760: $field_data->{'desc'} = ucfirst($field_data->{'key'});
2761: }
2762: $field_data->{'desc'} = &mt($field_data->{'desc'});
2763: }
2764: }
2765: my %sort_fields = map {$_->{'key'},$_->{'desc'}} @fields;
2766: $sort_fields{'select_form_order'} = \@field_order;
2767: $env{'form.sortorder'} = 'desc' if (! exists($env{'form.sortorder'}));
2768: if (! exists($env{'form.sortfield'})) {
2769: if ($area eq 'portfolio') {
2770: $env{'form.sortfield'} = 'owner';
2771: } else {
2772: $env{'form.sortfield'} = 'count';
2773: }
2774: }
2775: if (! exists($env{'form.sortorder'})) {
2776: if ($env{'form.sortfield'}=~/^(count|stdno|disc|clear|technical|correct|helpful)$/) {
2777: $env{'form.sortorder'}='desc';
2778: } else {
2779: $env{'form.sortorder'}='asc';
2780: }
2781: }
2782: my $sortform = '<span class="LC_nobreak">'
2783: .&mt('Sort by:').' '
2784: .&Apache::loncommon::select_form($env{'form.sortfield'},
2785: 'sortfield',
2786: \%sort_fields)
2787: .' '
2788: .&Apache::loncommon::select_form($env{'form.sortorder'},
2789: 'sortorder',
2790: {asc =>&mt('Ascending'),
2791: desc=>&mt('Descending')
2792: })
2793: .'</span>';
2794: ##
2795: ## Display links for 'prev' and 'next' pages (if necessary) and Display Options
2796: $r->print('<fieldset>'."\n"
2797: .'<legend>'.&mt('Display Options').'</legend>'."\n"
2798: .$sortform
2799: .' '
2800: .&viewoptions()
2801: .'</fieldset>'
2802: .&prev_next_buttons($min,$env{'form.show'},$total_results)
2803: );
2804:
2805: if ($total_results == 0) {
2806: $r->print('<p class="LC_info">'.&mt('There are currently no results.').'</p>'.
2807: "</form>".
2808: &Apache::loncommon::end_page());
2809: return;
2810: } else {
2811: $r->print('<div>'.
2812: mt('Results [_1] to [_2] out of [_3]',
2813: $min,$max,$total_results).
2814: "</div>\n");
2815: }
2816: ##
2817: ## Get results from MySQL table
2818: my $sort_command = 'id>='.$min.' AND id<='.$max;
2819: my $order;
2820: if (exists($env{'form.sortorder'})) {
2821: if ($env{'form.sortorder'} eq 'asc') {
2822: $order = 'ASC';
2823: } elsif ($env{'form.sortorder'} eq 'desc') {
2824: $order = 'DESC';
2825: } else {
2826: $order = '';
2827: }
2828: } else {
2829: $order = '';
2830: }
2831: if ($env{'form.sortfield'} ne 'default' &&
2832: exists($sort_fields{$env{'form.sortfield'}})) {
2833: $sort_command = $env{'form.sortfield'}.' IS NOT NULL '.
2834: 'ORDER BY '.$env{'form.sortfield'}.' '.$order.
2835: ' LIMIT '.($min-1).','.($max-$min+1);
2836: }
2837: my @Results = &Apache::lonmysql::get_rows($table,$sort_command);
2838: ##
2839: ## Loop through the results and output them.
2840: my $tabletype = 'metadata';
2841: if ($area eq 'portfolio') {
2842: $tabletype = 'portfolio_search';
2843: }
2844: $r->print(&Apache::loncommon::start_data_table());
2845: foreach my $row (@Results) {
2846: if ($connection->aborted()) {
2847: &cleanup();
2848: return;
2849: }
2850: my %Fields = %{&parse_row($tabletype,@$row)};
2851: my $output;
2852: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2853: $Fields{'title'} = 'Untitled';
2854: }
2855: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2856: $Fields{'id'},$checkbox_num++);
2857: # Render the result into html
2858: $output.= &$viewfunction($prefix,%Fields);
2859: # Print them out as they come in.
2860: $r->print(&Apache::loncommon::start_data_table_row()
2861: .'<td>'
2862: .$output
2863: .'</td>'
2864: .&Apache::loncommon::end_data_table_row()
2865: );
2866: $r->rflush();
2867: }
2868: $r->print(&Apache::loncommon::end_data_table());
2869: if (@Results < 1) {
2870: $r->print('<p class="LC_info">'
2871: .&mt('There were no results matching your query.')
2872: .'</p>');
2873: } else {
2874: $r->print(
2875: &prev_next_buttons($min,$env{'form.show'},$total_results,
2876: "table=".$env{'form.table'}.
2877: "&phase=results".
2878: "&persistent_db_id=".
2879: $env{'form.persistent_db_id'})
2880: );
2881: }
2882: $r->print("</form>".&Apache::loncommon::end_page());
2883: $r->rflush();
2884: untie %groupsearch_db if (tied(%groupsearch_db));
2885: return;
2886: }
2887:
2888: ######################################################################
2889: ######################################################################
2890:
2891: =pod
2892:
2893: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2894:
2895: Returns html needed for the various catalog modes. Gets inputs from
2896: $env{'form.catalogmode'}. Stores data in %groupsearch_db.
2897:
2898: =cut
2899:
2900: ######################################################################
2901: ######################################################################
2902: sub catalogmode_output {
2903: my $output = '';
2904: my ($title,$url,$fnum,$checkbox_num) = @_;
2905: if ($env{'form.catalogmode'} eq 'interactive') {
2906: $title=~ s/\'/\\\'/g;
2907: if ($env{'form.catalogmode'} eq 'interactive') {
2908: $output.=<<END
2909: <font size='-1'><input type="button" name="returnvalues" value="select"
2910: onclick="javascript:select_data('$title','$url')" />
2911: </font>
2912: END
2913: }
2914: } elsif ($env{'form.catalogmode'} eq 'import') {
2915: $groupsearch_db{"pre_${fnum}_link"}=$url;
2916: $groupsearch_db{"pre_${fnum}_title"}=$title;
2917: $output.=<<END;
2918: <font size='-1'>
2919: <input type="checkbox" name="returnvalues" value="select"
2920: onclick="javascript:queue($checkbox_num,$fnum)" />
2921: </font>
2922: END
2923: }
2924: return $output;
2925: }
2926: ######################################################################
2927: ######################################################################
2928:
2929: =pod
2930:
2931: =item &parse_row()
2932:
2933: Parse a row returned from the database.
2934:
2935: =cut
2936:
2937: ######################################################################
2938: ######################################################################
2939: sub parse_row {
2940: my ($tabletype,@Row) = @_;
2941: my %Fields;
2942: if (! scalar(@Datatypes)) {
2943: &set_up_table_structure($tabletype);
2944: }
2945: for (my $i=0;$i<=$#Row;$i++) {
2946: $Fields{$Datatypes[$i]->{'name'}}=&unescape($Row[$i]);
2947: }
2948: $Fields{'language'} =
2949: &Apache::loncommon::languagedescription($Fields{'language'});
2950: $Fields{'copyrighttag'} =
2951: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2952: $Fields{'mimetag'} =
2953: &Apache::loncommon::filedescription($Fields{'mime'});
2954: return \%Fields;
2955: }
2956:
2957: ###########################################################
2958: ###########################################################
2959:
2960: =pod
2961:
2962: =item &parse_raw_result()
2963:
2964: Takes a line from the file of results and parse it. Returns a hash
2965: with keys according to column labels
2966:
2967: In addition, the following tags are set by calling the appropriate
2968: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2969:
2970: The 'title' field is set to "Untitled" if the title field is blank.
2971:
2972: 'abstract' and 'keywords' are truncated to 200 characters.
2973:
2974: =cut
2975:
2976: ###########################################################
2977: ###########################################################
2978: sub parse_raw_result {
2979: my ($result,$hostname,$tabletype) = @_;
2980: # conclude from self to others regarding fields
2981: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2982: ($tabletype,
2983: map {
2984: &unescape($_);
2985: } (split(/\,/,$result)) );
2986: return %Fields;
2987: }
2988:
2989: ###########################################################
2990: ###########################################################
2991:
2992: =pod
2993:
2994: =item &handle_custom_fields()
2995:
2996: =cut
2997:
2998: ###########################################################
2999: ###########################################################
3000: sub handle_custom_fields {
3001: my @results = @{shift()};
3002: my $customshow='';
3003: my $extrashow='';
3004: my @customfields;
3005: if ($env{'form.customshow'}) {
3006: $customshow=$env{'form.customshow'};
3007: $customshow=~s/[^\w\s]//g;
3008: my @fields=map {
3009: "<font color=\"#008000\">$_:</font><!-- $_ -->";
3010: } split(/\s+/,$customshow);
3011: @customfields=split(/\s+/,$customshow);
3012: if ($customshow) {
3013: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
3014: }
3015: }
3016: my $customdata='';
3017: my %customhash;
3018: foreach my $result (@results) {
3019: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
3020: my $tmp=$result;
3021: $tmp=~s/^custom\=//;
3022: my ($k,$v)=map {&unescape($_);
3023: } split(/\,/,$tmp);
3024: $customhash{$k}=$v;
3025: }
3026: }
3027: return ($extrashow,\@customfields,\%customhash);
3028: }
3029:
3030: ######################################################################
3031: ######################################################################
3032:
3033: =pod
3034:
3035: =item &search_results_header()
3036:
3037: Output the proper html headers and javascript code to deal with different
3038: calling modes.
3039:
3040: Takes most inputs directly from %env, except $mode.
3041:
3042: =over 4
3043:
3044: =item $mode is either (at this writing) 'Basic' or 'Advanced'
3045:
3046: =back
3047:
3048: The following environment variables are checked:
3049:
3050: =over 4
3051:
3052: =item 'form.catalogmode'
3053:
3054: Checked for 'interactive' and 'import'.
3055:
3056: =item 'form.mode'
3057:
3058: Checked for existance & 'edit' mode.
3059:
3060: =item 'form.form'
3061:
3062: Contains the name of the form that has the input fields to set
3063:
3064: =item 'form.element'
3065:
3066: the name of the input field to put the URL into
3067:
3068: =item 'form.titleelement'
3069:
3070: the name of the input field to put the title into
3071:
3072: =back
3073:
3074: =cut
3075:
3076: ######################################################################
3077: ######################################################################
3078: sub search_results_header {
3079: my ($importbutton,$closebutton) = @_;
3080:
3081: my $js;
3082: # output beginning of search page
3083: # conditional output of script functions dependent on the mode in
3084: # which the search was invoked
3085: if ($env{'form.catalogmode'} eq 'interactive'){
3086: if (! exists($env{'form.mode'}) || $env{'form.mode'} ne 'edit') {
3087: $js.=<<SCRIPT;
3088: <script type="text/javascript">
3089: // <![CDATA[
3090: function select_data(title,url) {
3091: changeTitle(title);
3092: changeURL(url);
3093: parent.close();
3094: }
3095: function changeTitle(val) {
3096: if (parent.opener.inf.document.forms.resinfo.elements.t) {
3097: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
3098: }
3099: }
3100: function changeURL(val) {
3101: if (parent.opener.inf.document.forms.resinfo.elements.u) {
3102: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
3103: }
3104: }
3105: // ]]>
3106: </script>
3107: SCRIPT
3108: } elsif ($env{'form.mode'} eq 'edit') {
3109: my $form = $env{'form.form'};
3110: my $element = $env{'form.element'};
3111: my $titleelement = $env{'form.titleelement'};
3112: my $changetitle;
3113: if (!$titleelement) {
3114: $changetitle='function changeTitle(val) {}';
3115: } else {
3116: $changetitle=<<END;
3117: function changeTitle(val) {
3118: if (parent.targetwin.document) {
3119: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
3120: } else {
3121: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
3122: alert("Unable to transfer data to "+url);
3123: }
3124: }
3125: END
3126: }
3127:
3128: $js.=<<SCRIPT;
3129: <script type="text/javascript">
3130: // <![CDATA[
3131: function select_data(title,url) {
3132: changeURL(url);
3133: changeTitle(title);
3134: parent.close();
3135: }
3136: $changetitle
3137: function changeURL(val) {
3138: if (parent.targetwin.document) {
3139: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
3140: } else {
3141: var url = 'forms[\"$form\"].elements[\"$element\"].value';
3142: alert("Unable to transfer data to "+url);
3143: }
3144: }
3145: // ]]>
3146: </script>
3147: SCRIPT
3148: }
3149: }
3150: my $inhibit_menu = "&".&Apache::loncommon::inhibit_menu_check();
3151: $js.=<<SCRIPT if $env{'form.catalogmode'} eq 'import';
3152: <script type="text/javascript">
3153: // <![CDATA[
3154: function queue(checkbox_num,val) {
3155: if (document.forms.results.returnvalues.length != "undefined" &&
3156: typeof(document.forms.results.returnvalues.length) == "number") {
3157: if (document.forms.results.returnvalues[checkbox_num].checked) {
3158: parent.statusframe.document.forms.statusform.elements.acts.value +='1a'+val+'b';
3159: } else {
3160: parent.statusframe.document.forms.statusform.elements.acts.value +='0a'+val+'b';
3161: }
3162: } else {
3163: if (document.forms.results.returnvalues.checked) {
3164: parent.statusframe.document.forms.statusform.elements.acts.value +='1a'+val+'b';
3165: } else {
3166: parent.statusframe.document.forms.statusform.elements.acts.value +='0a'+val+'b';
3167: }
3168: }
3169: }
3170: function select_group() {
3171: parent.window.location=
3172: "/adm/groupsort?mode=$env{'form.mode'}&catalogmode=import$inhibit_menu&acts="+
3173: parent.statusframe.document.forms.statusform.elements.acts.value;
3174: }
3175: // ]]>
3176: </script>
3177: SCRIPT
3178:
3179: my $start_page = &Apache::loncommon::start_page(undef,$js,
3180: {'only_body' =>1,
3181: 'add_wishlist' =>1,
3182: 'add_modal' =>1});
3183: my $result=<<END;
3184: $start_page
3185: <form name="results" method="post" action="/adm/searchcat">
3186: $importbutton
3187: END
3188: return $result;
3189: }
3190:
3191: sub results_link {
3192: my $basic_link = "/adm/searchcat?"."&table=".$env{'form.table'}.
3193: "&persistent_db_id=".$env{'form.persistent_db_id'};
3194: my $results_link = $basic_link."&phase=results".
3195: "&pause=1"."&start=1";
3196: return $results_link;
3197: }
3198:
3199: ######################################################################
3200: ######################################################################
3201: sub print_frames_interface {
3202: my $r = shift;
3203: my $basic_link = "/adm/searchcat?"."&table=".$env{'form.table'}.
3204: "&persistent_db_id=".$env{'form.persistent_db_id'};
3205: my $run_search_link = $basic_link."&phase=run_search";
3206: my $results_link = &results_link();
3207: my $js = <<JS;
3208: <script type="text/javascript">
3209: // <![CDATA[
3210: var targetwin = opener;
3211: var queue = '';
3212: // ]]>
3213: </script>
3214: JS
3215:
3216: my $start_page =
3217: &Apache::loncommon::start_page('LON-CAPA Digital Library Search Results',
3218: $js,
3219: {'frameset' => 1,
3220: 'add_entries' => {
3221: 'rows' => "150,*",},});
3222: my $end_page =
3223: &Apache::loncommon::end_page({'frameset' => 1});
3224:
3225: my $result = <<"ENDFRAMES";
3226: $start_page
3227: <frame name="statusframe" src="$run_search_link">
3228: <frame name="resultsframe" src="$results_link">
3229: $end_page
3230: ENDFRAMES
3231:
3232: $r->print($result);
3233: return;
3234: }
3235:
3236: ######################################################################
3237: ######################################################################
3238:
3239: sub has_stat_data {
3240: my ($values) = @_;
3241: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
3242: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
3243: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
3244: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
3245: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
3246: return 1;
3247: }
3248: return 0;
3249: }
3250:
3251: sub statfields {
3252: return ('count','stdno','disc','avetries','difficulty');
3253: }
3254:
3255: sub has_eval_data {
3256: my ($values) = @_;
3257: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
3258: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
3259: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
3260: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
3261: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
3262: return 1;
3263: }
3264: return 0;
3265: }
3266:
3267: sub evalfields {
3268: return ('clear','technical','correct','helpful','depth');
3269: }
3270:
3271: ######################################################################
3272: ######################################################################
3273:
3274: sub display_tools {
3275: my ($title, $jumpurl) = @_;
3276: my $result;
3277: # Metadata
3278: $result.=
3279: &Apache::loncommon::modal_link(
3280: $jumpurl.'.meta?inhibitmenu=yes',
3281: '<img class="LC_icon" src="/res/adm/pages/catalog.png" alt="Info" />',
3282: 500,500,'_blank',undef,&mt('Metadata'));
3283: # Stored Links
3284: $result.=
3285: ' <a href="javascript:;"'.
3286: ' onclick="set_wishlistlink('."'$title','$jumpurl'".')" '.
3287: 'title="'.&mt('Save a link for this resource in your personal Stored Links repository').'">'.
3288: '<img class="LC_icon" src="/res/adm/pages/wishlist.png" '.
3289: 'alt="Stored Links" style="width:22px;"/></a>';
3290: return $result;
3291: }
3292:
3293: ######################################################################
3294: ######################################################################
3295:
3296: =pod
3297:
3298: =item Metadata Viewing Functions
3299:
3300: Output is a HTML-ified string.
3301:
3302: Input arguments are title, author, subject, url, keywords, version,
3303: notes, short abstract, mime, language, creation date,
3304: last revision date, owner, copyright, hostname, and
3305: extra custom metadata to show.
3306:
3307: =over 4
3308:
3309: =item &detailed_citation_view()
3310:
3311: =cut
3312:
3313: ######################################################################
3314: ######################################################################
3315: sub detailed_citation_view {
3316: my ($prefix,%values) = @_;
3317: my $result;
3318: my $jumpurl=$values{'url'};
3319: $jumpurl=~s|^/ext/|http://|;
3320: $result .=
3321: '<b>'.$prefix.
3322: '<img src="'.&Apache::loncommon::icon($values{'url'}).'" alt="" />'.' '.
3323: '<a href="'.$jumpurl.'?inhibitmenu=yes" '.
3324: 'target="preview">'.$values{'title'}."</a></b>\n".
3325: &display_tools($values{'title'}, $jumpurl).
3326: "<p>\n".
3327: '<b>'.$values{'author'}.'</b>,'.
3328: ' <i>'.$values{'owner'}.'</i><br />';
3329: foreach my $field
3330: (
3331: { name=>'url',
3332: translate => '<b>URL:</b> [_1]',
3333: special => 'url link',},
3334: { name=>'subject',
3335: translate => '<b>Subject:</b> [_1]',},
3336: { name=>'keywords',
3337: translate => '<b>Keywords:</b> [_1]',},
3338: { name=>'notes',
3339: translate => '<b>Notes:</b> [_1]',},
3340: { name=>'mimetag',
3341: translate => '<b>MIME Type:</b> [_1]',},
3342: { name=>'standards',
3343: translate => '<b>Standards:</b>[_1]',},
3344: { name=>'copyrighttag',
3345: translate => '<b>Copyright/Distribution:</b> [_1]',},
3346: { name=>'count',
3347: format => "%d",
3348: translate => '<b>Access Count:</b> [_1]',},
3349: { name=>'stdno',
3350: format => "%d",
3351: translate => '<b>Number of Students:</b> [_1]',},
3352: { name=>'avetries',
3353: format => "%.2f",
3354: translate => '<b>Average Tries:</b> [_1]',},
3355: { name=>'disc',
3356: format => "%.2f",
3357: translate => '<b>Degree of Discrimination:</b> [_1]',},
3358: { name=>'difficulty',
3359: format => "%.2f",
3360: translate => '<b>Degree of Difficulty:</b> [_1]',},
3361: { name=>'clear',
3362: format => "%.2f",
3363: translate => '<b>Clear:</b> [_1]',},
3364: { name=>'depth',
3365: format => "%.2f",
3366: translate => '<b>Depth:</b> [_1]',},
3367: { name=>'helpful',
3368: format => "%.2f",
3369: translate => '<b>Helpful:</b> [_1]',},
3370: { name=>'correct',
3371: format => "%.2f",
3372: translate => '<b>Correct:</b> [_1]',},
3373: { name=>'technical',
3374: format => "%.2f",
3375: translate => '<b>Technical:</b> [_1]',},
3376: { name=>'comefrom_list',
3377: type => 'list',
3378: translate => 'Resources that lead up to this resource in maps',},
3379: { name=>'goto_list',
3380: type => 'list',
3381: translate => 'Resources that follow this resource in maps',},
3382: { name=>'sequsage_list',
3383: type => 'list',
3384: translate => 'Resources using or importing resource',},
3385: ) {
3386: next if (! exists($values{$field->{'name'}}) ||
3387: $values{$field->{'name'}} eq '');
3388: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3389: $result .= '<b>'.&mt($field->{'translate'}).'</b>';
3390: foreach my $item (split(',',$values{$field->{'name'}})){
3391: $item = &Apache::lonnet::clutter($item);
3392: $result .= '<br />'.&display_url($item,1).'<br />';
3393: }
3394: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3395: $result.= &mt($field->{'translate'},
3396: sprintf($field->{'format'},
3397: $values{$field->{'name'}}))."<br />\n";
3398: } else {
3399: if ($field->{'special'} eq 'url link') {
3400: $result .= '<br />'.&display_url($jumpurl,1).'<br />';
3401: } else {
3402: $result.= &mt($field->{'translate'},
3403: $values{$field->{'name'}});
3404: }
3405: $result .= "<br />\n";
3406: }
3407: }
3408: $result .= "</p>";
3409: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3410: $result .= '<p>'.$values{'extrashow'}.'</p>';
3411: }
3412: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3413: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3414: }
3415: return $result;
3416: }
3417:
3418: sub detailed_citation_preview {
3419: my ($prefix,%values)=@_;
3420: return &detailed_citation_view($prefix,%values).
3421: '</td><td>'.
3422: &Apache::lonindexer::showpreview($values{'url'});
3423: }
3424:
3425:
3426: ######################################################################
3427: ######################################################################
3428:
3429: =pod
3430:
3431: =item &summary_view()
3432:
3433: =cut
3434: ######################################################################
3435: ######################################################################
3436: sub summary_view {
3437: my ($prefix,%values) = @_;
3438: my $icon=&Apache::loncommon::icon($values{'url'});
3439: my $result=qq{$prefix<img src="$icon" alt="" />};
3440: if (exists($env{'form.sortfield'}) &&
3441: $env{'form.sortfield'} !~ /^(default|
3442: author|
3443: url|
3444: title|
3445: owner|
3446: lastrevisiondate|
3447: copyright)$/x) {
3448: my $tmp = $values{$env{'form.sortfield'}};
3449: if (! defined($tmp)) { $tmp = 'undefined'; }
3450: $result .= ' '.$tmp.' ';
3451: }
3452: my $jumpurl=$values{'url'};
3453: $jumpurl=~s|^/ext/|http://|;
3454: my $link = '<br />'.&display_url($jumpurl,1).'<br />';
3455: $result .=
3456: '<a href="'.$jumpurl.'?inhibitmenu=yes"'.
3457: ' target="preview">'.$values{'title'}.'</a>'.
3458: &display_tools($values{'title'}, $jumpurl).<<END;
3459: <br />
3460: $link<br />
3461: $values{'author'}, $values{'owner'} -- $values{'lastrevisiondate'}<br />
3462: $values{'copyrighttag'}<br />
3463: $values{'extrashow'}
3464: END
3465: return $result;
3466: }
3467:
3468: sub summary_preview {
3469: my ($prefix,%values)=@_;
3470: return &summary_view($prefix,%values).
3471: '</td><td>'.
3472: &Apache::lonindexer::showpreview($values{'url'});
3473: }
3474:
3475: ######################################################################
3476: ######################################################################
3477:
3478: =pod
3479:
3480: =item &compact_view()
3481:
3482: =cut
3483:
3484: ######################################################################
3485: ######################################################################
3486: sub compact_view {
3487: my ($prefix,%values) = @_;
3488: my $jumpurl=$values{'url'};
3489: $jumpurl=~s|^/ext/|http://|;
3490:
3491: my $link = &display_url($jumpurl,1);
3492:
3493: my $result =
3494: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).'" alt="" />';
3495: if (exists($env{'form.sortfield'}) &&
3496: $env{'form.sortfield'} !~ /^(default|author|url|title)$/) {
3497: my $tmp = $values{$env{'form.sortfield'}};
3498: if (! defined($tmp)) { $tmp = 'undefined'; }
3499: $result .= ' '.$tmp.' ';
3500: }
3501: $jumpurl = &HTML::Entities::encode($jumpurl,'<>&"');
3502: $result.=' <span class="LC_nobreak">'.
3503: '<a href="'.$jumpurl.'?inhibitmenu=yes" target="preview">'.
3504: &HTML::Entities::encode($values{'title'},'<>&"').'</a></span> '.
3505: &display_tools($values{'title'}, $jumpurl).
3506: $link.' <b>'.$values{'author'}.'</b> ('.$values{'domain'}.')';
3507: return $result;
3508: }
3509:
3510: sub display_url {
3511: my ($url,$skiplast) = @_;
3512: my $link;
3513: if ($url=~m|^/ext/|) {
3514: $url=~s|^/ext/|http://|;
3515: $link='<span class="LC_filename">'.$url.'</span>';
3516: } elsif ($url=~m{^(http://|/uploaded/)}) {
3517: $link='<span class="LC_filename">'.$url.'</span>';
3518: } else {
3519: $link=&Apache::lonhtmlcommon::crumbs(
3520: $url,
3521: 'preview',
3522: '',
3523: (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),
3524: $skiplast).' ';
3525: }
3526: return $link;
3527: }
3528:
3529: ######################################################################
3530: ######################################################################
3531:
3532: =pod
3533:
3534: =item &fielded_format_view()
3535:
3536: =cut
3537:
3538: ######################################################################
3539: ######################################################################
3540: sub fielded_format_view {
3541: my ($prefix,%values) = @_;
3542: my $icon=&Apache::loncommon::icon($values{'url'});
3543: my %Translated = &Apache::lonmeta::fieldnames();
3544: my $jumpurl=$values{'url'};
3545: $jumpurl=~s|^/ext/|http://|;
3546:
3547: my $result=<<END;
3548: $prefix <img src="$icon" alt="" />
3549: <dl>
3550: <dt>URL:</dt>
3551: <dd><a href="$jumpurl?inhibitmenu=yes"
3552: target='preview'>$values{'url'}</a>
3553: END
3554: $result .=
3555: &display_tools($values{'title'}, $jumpurl).'
3556: </dd>';
3557: foreach my $field ('title','author','domain','subject','keywords','notes',
3558: 'mimetag','language','creationdate','lastrevisiondate',
3559: 'owner','copyrighttag','hostname','abstract') {
3560: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3561: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3562: }
3563: if (&has_stat_data(\%values)) {
3564: foreach my $field (&statfields()) {
3565: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3566: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3567: }
3568: }
3569: if (&has_eval_data(\%values)) {
3570: foreach my $field (&evalfields()) {
3571: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3572: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3573: }
3574: }
3575: $result .= "</dl>\n";
3576: $result .= $values{'extrashow'};
3577: return $result;
3578: }
3579:
3580: ######################################################################
3581: ######################################################################
3582:
3583: =pod
3584:
3585: =item &xml_sgml_view()
3586:
3587: =back
3588:
3589: =cut
3590:
3591: ######################################################################
3592: ######################################################################
3593: sub xml_sgml_view {
3594: my ($prefix,%values) = @_;
3595: my $xml = '<LonCapaResource>'."\n";
3596: # The usual suspects
3597: foreach my $field ('url','title','author','subject','keywords','notes','domain') {
3598: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3599: }
3600: #
3601: $xml .= "<mimeInfo>\n";
3602: foreach my $field ('mime','mimetag') {
3603: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3604: }
3605: $xml .= "</mimeInfo>\n";
3606: #
3607: $xml .= "<languageInfo>\n";
3608: foreach my $field ('language','languagetag') {
3609: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3610: }
3611: $xml .= "</languageInfo>\n";
3612: #
3613: foreach my $field ('creationdate','lastrevisiondate','owner') {
3614: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3615: }
3616: #
3617: $xml .= "<copyrightInfo>\n";
3618: foreach my $field ('copyright','copyrighttag') {
3619: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3620: }
3621: $xml .= "</copyrightInfo>\n";
3622: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3623: "\n";
3624: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3625: #
3626: if (&has_stat_data(\%values)){
3627: $xml .= "<problemstatistics>\n";
3628: foreach my $field (&statfields()) {
3629: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3630: }
3631: $xml .= "</problemstatistics>\n";
3632: }
3633: #
3634: if (&has_eval_data(\%values)) {
3635: $xml .= "<evaluation>\n";
3636: foreach my $field (&evalfields) {
3637: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3638: }
3639: $xml .= "</evaluation>\n";
3640: }
3641: #
3642: $xml .= "</LonCapaResource>\n";
3643: $xml = &HTML::Entities::encode($xml,'<>&');
3644: my $result=<<END;
3645: $prefix
3646: <pre>
3647: $xml
3648: </pre>
3649: $values{'extrashow'}
3650: END
3651: return $result;
3652: }
3653:
3654: ######################################################################
3655: ######################################################################
3656:
3657: =pod
3658:
3659: =item &filled() see if field is filled.
3660:
3661: =cut
3662:
3663: ######################################################################
3664: ######################################################################
3665: sub filled {
3666: my ($field)=@_;
3667: if ($field=~/\S/ && $field ne 'any') {
3668: return 1;
3669: } else {
3670: return 0;
3671: }
3672: }
3673:
3674: ######################################################################
3675: ######################################################################
3676:
3677: =pod
3678:
3679: =item &output_unparsed_phrase_error()
3680:
3681: =cut
3682:
3683: ######################################################################
3684: ######################################################################
3685: sub output_unparsed_phrase_error {
3686: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3687: my $errorstring;
3688: if ($field eq 'basicexp') {
3689: $errorstring = &mt('Unable to understand the search phrase [_1]. Please modify your search.'
3690: ,'<i>'.$env{'form.basicexp'}.'</i>');
3691: } else {
3692: $errorstring = &mt('Unable to understand the search phrase [_1]: [_2]'
3693: ,'<i>'.$field.'</i>'
3694: ,$env{'form.'.$field});
3695: }
3696: my $heading = &mt('Unparsed Field');
3697: my $revise = &mt('Revise search request');
3698: # make query information persistent to allow for subsequent revision
3699: my $start_page = &Apache::loncommon::start_page('Search');
3700: my $end_page = &Apache::loncommon::end_page();
3701: $r->print(<<ENDPAGE);
3702: $start_page
3703: <form method="post" action="/adm/searchcat">
3704: $hidden_fields
3705: $closebutton
3706: <hr />
3707: <h2>$heading</h2>
3708: <p class="LC_warning">
3709: $errorstring
3710: </p>
3711: <p>
3712: <a href="/adm/searchcat?$parms&persistent_db_id=$env{'form.persistent_db_id'}">$revise</a>
3713: </p>
3714: $end_page
3715: ENDPAGE
3716: }
3717:
3718: ######################################################################
3719: ######################################################################
3720:
3721: =pod
3722:
3723: =item &output_blank_field_error()
3724:
3725: Output a complete page that indicates the user has not filled in enough
3726: information to do a search.
3727:
3728: Inputs: $r (Apache request handle), $closebutton, $parms.
3729:
3730: Returns: nothing
3731:
3732: $parms is extra information to include in the 'Revise search request' link.
3733:
3734: =cut
3735:
3736: ######################################################################
3737: ######################################################################
3738: sub output_blank_field_error {
3739: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3740: 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.');
3741: my $revise = &mt('Revise Search Request');
3742: my $heading = &mt('Unactionable Search Query');
3743: my $start_page = &Apache::loncommon::start_page('Search');
3744: my $end_page = &Apache::loncommon::end_page();
3745: if ($closebutton) {
3746: $closebutton = '<p>'.$closebutton.'</p><hr />';
3747: } else {
3748: &Apache::lonhtmlcommon::add_breadcrumb
3749: ({href=>'',
3750: text=>$heading,});
3751: $start_page .= &Apache::lonhtmlcommon::breadcrumbs();
3752: }
3753:
3754: $r->print(<<ENDPAGE);
3755: $start_page
3756: <form method="post" action="/adm/searchcat">
3757: $hidden_fields
3758: $closebutton
3759: </form>
3760: <h2>$heading</h2>
3761: <p class="LC_warning">
3762: $errormsg
3763: </p>
3764: <p>
3765: <a href="/adm/searchcat?$parms&persistent_db_id=$env{'form.persistent_db_id'}">$revise</a>
3766: </p>
3767: $end_page
3768: ENDPAGE
3769: return;
3770: }
3771:
3772: ######################################################################
3773: ######################################################################
3774:
3775: =pod
3776:
3777: =item &output_date_error()
3778:
3779: Output a full html page with an error message.
3780:
3781: Inputs:
3782:
3783: $r, the request pointer.
3784: $message, the error message for the user.
3785: $closebutton, the specialized close button needed for groupsearch.
3786:
3787: =cut
3788:
3789: ######################################################################
3790: ######################################################################
3791: sub output_date_error {
3792: my ($r,$message,$closebutton,$hidden_fields)=@_;
3793: # make query information persistent to allow for subsequent revision
3794: my $start_page = &Apache::loncommon::start_page('Search');
3795: my $end_page = &Apache::loncommon::end_page();
3796: my $heading = &mt('Error');
3797: $r->print(<<RESULTS);
3798: $start_page
3799: <form method="post" action="/adm/searchcat">
3800: $hidden_fields
3801: <input type='button' value='Revise search request'
3802: onclick='this.form.submit();' />
3803: $closebutton
3804: </form>
3805: <hr />
3806: <h3>$heading</h3>
3807: <p class="LC_error">
3808: $message
3809: </p>
3810: $end_page
3811: RESULTS
3812: }
3813:
3814: ######################################################################
3815: ######################################################################
3816:
3817: =pod
3818:
3819: =item &start_fresh_session()
3820:
3821: Cleans the global %groupsearch_db by removing all fields which begin with
3822: 'pre_' or 'store'.
3823:
3824: =cut
3825:
3826: ######################################################################
3827: ######################################################################
3828: sub start_fresh_session {
3829: delete $groupsearch_db{'mode_catalog'};
3830: foreach (keys(%groupsearch_db)) {
3831: if ($_ =~ /^pre_/) {
3832: delete $groupsearch_db{$_};
3833: }
3834: if ($_ =~ /^store/) {
3835: delete $groupsearch_db{$_};
3836: }
3837: }
3838: }
3839:
3840: 1;
3841:
3842: sub cleanup {
3843: if (tied(%groupsearch_db)) {
3844: unless (untie(%groupsearch_db)) {
3845: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3846: }
3847: }
3848: &Apache::lonmysql::disconnect_from_db();
3849: return OK;
3850: }
3851:
3852: __END__
3853:
3854: =pod
3855:
3856: =back
3857:
3858: =cut
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