1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.268 2006/06/08 16:58:56 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet;
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78: use Parse::RecDescent;
79: use Apache::lonnavmaps;
80: use Apache::lonindexer();
81: use lib '/home/httpd/lib/perl/';
82: use LONCAPA;
83:
84: ######################################################################
85: ######################################################################
86: ##
87: ## Global variables
88: ##
89: ######################################################################
90: ######################################################################
91: my %groupsearch_db; # Database hash used to save values for the
92: # groupsearch RAT interface.
93: my %persistent_db; # gdbm hash which holds data which is supposed to
94: # persist across calls to lonsearchcat.pm
95:
96: # The different view modes and associated functions
97:
98: my %Views = ("detailed" => \&detailed_citation_view,
99: "detailedpreview" => \&detailed_citation_preview,
100: "summary" => \&summary_view,
101: "summarypreview" => \&summary_preview,
102: "fielded" => \&fielded_format_view,
103: "xml" => \&xml_sgml_view,
104: "compact" => \&compact_view);
105:
106: ######################################################################
107: ######################################################################
108: sub handler {
109: my $r = shift;
110: # &set_defaults();
111: #
112: # set form defaults
113: #
114: my $hidden_fields;# Hold all the hidden fields used to keep track
115: # of the search system state
116: my $importbutton; # button to take the selected results and go to group
117: # sorting
118: my $diropendb; # The full path to the (temporary) search database file.
119: # This is set and used in &handler() and is also used in
120: # &output_results().
121:
122: my $loaderror=&Apache::lonnet::overloaderror($r);
123: if ($loaderror) { return $loaderror; }
124: #
125: my $closebutton; # button that closes the search window
126: # This button is different for the RAT compared to
127: # normal invocation.
128: #
129: &Apache::loncommon::content_type($r,'text/html');
130: $r->send_http_header;
131: return OK if $r->header_only;
132: ##
133: ## Prevent caching of the search interface window. Hopefully this means
134: ## we will get the launch=1 passed in a little more.
135: &Apache::loncommon::no_cache($r);
136: ##
137: ## Pick up form fields passed in the links.
138: ##
139: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
140: ['catalogmode','launch','acts','mode','form','element','pause',
141: 'phase','persistent_db_id','table','start','show',
142: 'cleargroupsort','titleelement']);
143: ##
144: ## The following is a trick - we wait a few seconds if asked to so
145: ## the daemon running the search can get ahead of the daemon
146: ## printing the results. We only need (theoretically) to do
147: ## this once, so the pause indicator is deleted
148: ##
149: if (exists($env{'form.pause'})) {
150: sleep(1);
151: delete($env{'form.pause'});
152: }
153: ##
154: ## Initialize global variables
155: ##
156: my $domain = $r->dir_config('lonDefDomain');
157: $diropendb= "/home/httpd/perl/tmp/".
158: "$env{'user.domain'}_$env{'user.name'}_sel_res.db";
159: #
160: # set the name of the persistent database
161: # $env{'form.persistent_db_id'} can only have digits in it.
162: if (! exists($env{'form.persistent_db_id'}) ||
163: ($env{'form.persistent_db_id'} =~ /\D/) ||
164: ($env{'form.launch'} eq '1')) {
165: $env{'form.persistent_db_id'} = time;
166: }
167:
168: my $persistent_db_file = "/home/httpd/perl/tmp/".
169: &escape($domain).
170: '_'.&escape($env{'user.name'}).
171: '_'.$env{'form.persistent_db_id'}.'_persistent_search.db';
172: ##
173: &Apache::lonhtmlcommon::clear_breadcrumbs();
174: if (exists($env{'request.course.id'}) && $env{'request.course.id'} ne '') {
175: &Apache::lonhtmlcommon::add_breadcrumb
176: ({href=>'/adm/searchcat?'.
177: 'catalogmode='.$env{'form.catalogmode'}.
178: '&launch='.$env{'form.launch'}.
179: '&mode='.$env{'form.mode'},
180: text=>"Course and Catalog Search",
181: target=>'_top',
182: bug=>'Searching',});
183: } else {
184: &Apache::lonhtmlcommon::add_breadcrumb
185: ({href=>'/adm/searchcat?'.
186: 'catalogmode='.$env{'form.catalogmode'}.
187: '&launch='.$env{'form.launch'}.
188: '&mode='.$env{'form.mode'},
189: text=>"Catalog Search",
190: target=>'_top',
191: bug=>'Searching',});
192: }
193: #
194: if ($env{'form.phase'} !~ m/(basic|adv|course)_search/) {
195: if (! &get_persistent_form_data($persistent_db_file)) {
196: if ($env{'form.phase'} =~ /(run_search|results)/) {
197: &Apache::lonnet::logthis('lonsearchcat:'.
198: 'Unable to recover data from '.
199: $persistent_db_file);
200: my $msg =
201: 'We were unable to retrieve data describing your search. '.
202: 'This is a serious error and has been logged. '.
203: 'Please alert your LON-CAPA administrator.';
204: &Apache::loncommon::simple_error_page($r,'Search Error',
205: $msg);
206: return OK;
207: }
208: }
209: } else {
210: &clean_up_environment();
211: }
212: ##
213: ## Clear out old values from groupsearch database
214: ##
215: untie %groupsearch_db if (tied(%groupsearch_db));
216: if (($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: $hidden_fields .= &hidden_field('mode');
251: }
252: ##
253: ## Configure dynamic components of interface
254: ##
255: if ($env{'form.catalogmode'} eq 'interactive') {
256: $closebutton="<input type='button' name='close' value='CLOSE' ";
257: if ($env{'form.phase'} =~ /(results|run_search)/) {
258: $closebutton .="onClick='parent.close()'";
259: } else {
260: $closebutton .="onClick='self.close()'";
261: }
262: $closebutton .=">\n";
263: } elsif ($env{'form.catalogmode'} eq 'import') {
264: $closebutton="<input type='button' name='close' value='CLOSE' ";
265: if ($env{'form.phase'} =~ /(results|run_search)/) {
266: $closebutton .="onClick='parent.close()'";
267: } else {
268: $closebutton .="onClick='self.close()'";
269: }
270: $closebutton .= ">";
271: $importbutton=<<END;
272: <input type='button' name='import' value='IMPORT'
273: onClick='javascript:select_group()'>
274: END
275: } else {
276: $closebutton = '';
277: $importbutton = '';
278: }
279: ##
280: ## Sanity checks on form elements
281: ##
282: if (!defined($env{'form.viewselect'})) {
283: $env{'form.viewselect'} ="summary";
284: }
285: $env{'form.phase'} = 'disp_basic' if (! exists($env{'form.phase'}));
286: $env{'form.show'} = 20 if (! exists($env{'form.show'}));
287: #
288: $env{'form.searchmode'} = 'basic' if (! exists($env{'form.searchmode'}));
289: if ($env{'form.phase'} eq 'adv_search' ||
290: $env{'form.phase'} eq 'disp_adv') {
291: $env{'form.searchmode'} = 'advanced';
292: } elsif ($env{'form.phase'} eq 'course_search') {
293: $env{'form.searchmode'} = 'course_search';
294: }
295: #
296: if ($env{'form.searchmode'} eq 'advanced') {
297: &Apache::lonhtmlcommon::add_breadcrumb
298: ({href=>'/adm/searchcat?phase=disp_adv&'.
299: 'catalogmode='.$env{'form.catalogmode'}.
300: '&launch='.$env{'form.launch'}.
301: '&mode='.$env{'form.mode'},
302: text=>"Advanced Search",
303: bug=>'Searching',});
304: } elsif ($env{'form.searchmode'} eq 'course search') {
305: &Apache::lonhtmlcommon::add_breadcrumb
306: ({href=>'/adm/searchcat?phase=disp_adv&'.
307: 'catalogmode='.$env{'form.catalogmode'}.
308: '&launch='.$env{'form.launch'}.
309: '&mode='.$env{'form.mode'},
310: text=>"Course Search",
311: bug=>'Searching',});
312: }
313: ##
314: ## Switch on the phase
315: ##
316: if ($env{'form.phase'} eq 'disp_basic') {
317: &print_basic_search_form($r,$closebutton,$hidden_fields);
318: } elsif ($env{'form.phase'} eq 'disp_adv') {
319: &print_advanced_search_form($r,$closebutton,$hidden_fields);
320: } elsif ($env{'form.phase'} eq 'results') {
321: &display_results($r,$importbutton,$closebutton,$diropendb);
322: } elsif ($env{'form.phase'} =~ /^(sort|run_search)$/) {
323: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
324: &get_persistent_data($persistent_db_file,
325: ['query','customquery','customshow',
326: 'libraries','pretty_string']);
327: if ($env{'form.phase'} eq 'sort') {
328: &print_sort_form($r,$pretty_string);
329: } elsif ($env{'form.phase'} eq 'run_search') {
330: &run_search($r,$query,$customquery,$customshow,
331: $libraries,$pretty_string);
332: }
333: } elsif ($env{'form.phase'} eq 'course_search') {
334: &course_search($r);
335: } elsif(($env{'form.phase'} eq 'basic_search') ||
336: ($env{'form.phase'} eq 'adv_search')) {
337: #
338: # We are running a search, try to parse it
339: my ($query,$customquery,$customshow,$libraries) =
340: (undef,undef,undef,undef);
341: my $pretty_string;
342: if ($env{'form.phase'} eq 'basic_search') {
343: ($query,$pretty_string,$libraries) =
344: &parse_basic_search($r,$closebutton,$hidden_fields);
345: return OK if (! defined($query));
346: &make_persistent({ basicexp => $env{'form.basicexp'}},
347: $persistent_db_file);
348: } else { # Advanced search
349: ($query,$customquery,$customshow,$libraries,$pretty_string)
350: = &parse_advanced_search($r,$closebutton,$hidden_fields);
351: return OK if (! defined($query));
352: }
353: &make_persistent({ query => $query,
354: customquery => $customquery,
355: customshow => $customshow,
356: libraries => $libraries,
357: pretty_string => $pretty_string },
358: $persistent_db_file);
359: #
360: # Set up table
361: if (! defined(&create_results_table())) {
362: my $errorstring=&Apache::lonmysql::get_error();
363: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
364: 'needed table. lonmysql error:'.
365: $errorstring);
366:
367: my $msg =
368: 'Unable to create table in which to store search results. '.
369: 'The search has been aborted.';
370: &Apache::loncommon::simple_error_page($r,'Search Error',
371: $msg);
372: return OK;
373: }
374: delete($env{'form.launch'});
375: if (! &make_form_data_persistent($r,$persistent_db_file)) {
376: my $msg=
377: 'Unable to properly store search information. '.
378: 'The search has been aborted.';
379: &Apache::loncommon::simple_error_page($r,'Search Error',
380: $msg);
381: return OK;
382: }
383: ##
384: ## Print out the frames interface
385: ##
386: if (defined($query)) {
387: &print_frames_interface($r);
388: }
389: }
390: return OK;
391: }
392:
393: #
394: # The mechanism used to store values away and retrieve them does not
395: # handle the case of missing environment variables being significant.
396: #
397: # This routine sets non existant checkbox form elements to ''.
398: #
399: sub clean_up_environment {
400: if ($env{'form.phase'} eq 'basic_search') {
401: if (! exists($env{'form.related'})) {
402: $env{'form.related'} = '';
403: }
404: if (! exists($env{'form.domains'})) {
405: $env{'form.domains'} = '';
406: }
407: } elsif ($env{'form.phase'} eq 'adv_search') {
408: foreach my $field ('title','keywords','notes',
409: 'abstract','standards','mime') {
410: if (! exists($env{'form.'.$field.'_related'})) {
411: $env{'form.'.$field.'_related'} = '';
412: }
413: }
414: } elsif ($env{'form.phase'} eq 'course_search') {
415: if (! exists($env{'form.crsrelated'})) {
416: $env{'form.crsrelated'} = '';
417: }
418: }
419: }
420:
421: sub hidden_field {
422: my ($name,$value) = @_;
423: if (! defined($value)) {
424: $value = $env{'form.'.$name};
425: }
426: return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
427: }
428:
429: ######################################################################
430: ######################################################################
431: ##
432: ## Course Search
433: ##
434: ######################################################################
435: ######################################################################
436: { # Scope the course search to avoid global variables
437: #
438: # Variables For course search
439: my %alreadyseen;
440: my %hash;
441: my $totalfound;
442:
443: sub make_symb {
444: my ($id)=@_;
445: my ($mapid,$resid)=split(/\./,$id);
446: my $map=$hash{'map_id_'.$mapid};
447: my $res=$hash{'src_'.$id};
448: my $symb=&Apache::lonnet::encode_symb($map,$resid,$res);
449: return $symb;
450: }
451:
452: sub course_search {
453: my $r=shift;
454: my $pretty_search_string = '<b>'.$env{'form.courseexp'}.'</b>';
455: my $search_string = $env{'form.courseexp'};
456: my @New_Words;
457: undef(%alreadyseen);
458: if ($env{'form.crsrelated'}) {
459: ($search_string,@New_Words) = &related_version($env{'form.courseexp'});
460: if (@New_Words) {
461: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
462: } else {
463: $pretty_search_string .= ' '.&mt('with no related words').".";
464: }
465: }
466: my $fulltext=$env{'form.crsfulltext'};
467: my $discuss=$env{'form.crsdiscuss'};
468: my @allwords=($search_string,@New_Words);
469: $totalfound=0;
470: $r->print(&Apache::loncommon::start_page('Course Search').
471: '<hr /><center><font size="+2" face="arial">'.
472: $pretty_search_string.'</font></center>'.
473: '<hr /><b>'.&mt('Course content').':</b><br />');
474: $r->rflush();
475: # ======================================================= Go through the course
476: my $c=$r->connection;
477: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.".db",
478: &GDBM_READER(),0640)) {
479: foreach (sort(keys(%hash))) {
480: if ($c->aborted()) { last; }
481: if (($_=~/^src\_(.+)$/)) {
482: if ($hash{'randomout_'.$1} & !$env{'request.role.adv'}) {
483: next;
484: }
485: my $symb=&make_symb($1);
486: &checkonthis($r,$1,$hash{$_},0,&Apache::lonnet::gettitle($symb),
487: $fulltext,$symb,@allwords);
488: }
489: }
490: untie(%hash);
491: }
492: unless ($totalfound) {
493: $r->print('<p>'.&mt('No matches found in resources').'.</p>');
494: }
495:
496: # Check discussions if requested
497: if ($discuss) {
498: my $totaldiscussions = 0;
499: $r->print('<br /><br /><b>'.&mt('Discussion postings').':</b><br />');
500: my $navmap = Apache::lonnavmaps::navmap->new();
501: my @allres=$navmap->retrieveResources();
502: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
503: $env{'course.'.$env{'request.course.id'}.'.domain'},
504: $env{'course.'.$env{'request.course.id'}.'.num'});
505: foreach my $resource (@allres) {
506: my $result = '';
507: my $applies = 0;
508: my $symb = $resource->symb();
509: my $ressymb = $symb;
510: if ($symb =~ m#(___adm/\w+/\w+)/(\d+)/bulletinboard$#) {
511: $ressymb = 'bulletin___'.$2.$1.'/'.$2.'/bulletinboard';
512: unless ($ressymb =~ m#bulletin___\d+___adm/wrapper#) {
513: $ressymb=~s#(bulletin___\d+___)#$1adm/wrapper/#;
514: }
515: }
516: if (defined($discussiontime{$ressymb})) {
517: my %contrib = &Apache::lonnet::restore($ressymb,$env{'request.course.id'},
518: $env{'course.'.$env{'request.course.id'}.'.domain'},
519: $env{'course.'.$env{'request.course.id'}.'.num'});
520: if ($contrib{'version'}) {
521: for (my $id=1;$id<=$contrib{'version'};$id++) {
522: unless (($contrib{'hidden'}=~/\.$id\./) || ($contrib{'deleted'}=~/\.$id\./)) {
523: if ($contrib{$id.':subject'}) {
524: $result .= $contrib{$id.':subject'};
525: }
526: if ($contrib{$id.':message'}) {
527: $result .= $contrib{$id.':message'};
528: }
529: if ($contrib{$id,':attachmenturl'}) {
530: if ($contrib{$id,':attachmenturl'} =~ m-/([^/]+)$-) {
531: $result .= $1;
532: }
533: }
534: $applies = &checkwords($result,$applies,@allwords);
535: }
536: }
537: }
538: }
539: # Does this discussion apply?
540: if ($applies) {
541: my ($map,$ind,$url)=&Apache::lonnet::decode_symb($ressymb);
542: my $disctype = &mt('resource');
543: if ($url =~ m#/bulletinboard$#) {
544: if ($url =~m#^adm/wrapper/adm/.*/bulletinboard$#) {
545: $url =~s#^adm/wrapper##;
546: }
547: $disctype = &mt('bulletin board');
548: } else {
549: $url = '/res/'.$url;
550: }
551: if ($url =~ /\?/) {
552: $url .= '&symb=';
553: } else {
554: $url .= '?symb=';
555: }
556: $url .= &escape($resource->symb());
557: my $title = $resource->compTitle();
558: $r->print('<br /><a href="'.$url.'" target="cat">'.
559: ($title?$title:$url).'</a> - '.$disctype.'<br />');
560: $totaldiscussions++;
561: } else {
562: $r->print(' .');
563: }
564: }
565: unless ($totaldiscussions) {
566: $r->print('<p>'.&mt('No matches found in postings').'.</p>');
567: }
568: }
569:
570: # =================================================== Done going through course
571: $r->print(&Apache::loncommon::end_page());
572: }
573:
574: # =============================== This pulls up a resource and its dependencies
575:
576: sub checkonthis {
577: my ($r,$id,$url,$level,$title,$fulltext,$symb,@allwords)=@_;
578: $alreadyseen{$id}=1;
579: if (&Apache::loncommon::connection_aborted($r)) { return; }
580: $r->rflush();
581:
582: my $result=$title.' ';
583: if ($env{'request.role.adv'} || !$hash{'encrypted_'.$id}) {
584: $result.=&Apache::lonnet::metadata($url,'title').' '.
585: &Apache::lonnet::metadata($url,'subject').' '.
586: &Apache::lonnet::metadata($url,'abstract').' '.
587: &Apache::lonnet::metadata($url,'keywords');
588: }
589: my ($extension)=($url=~/\.(\w+)$/);
590: if (&Apache::loncommon::fileembstyle($extension) eq 'ssi' &&
591: ($url) && ($fulltext)) {
592: $result.=&Apache::lonnet::ssi_body($url.'?symb='.&escape($symb));
593: }
594: $result=~s/\s+/ /gs;
595: my $applies = 0;
596: $applies = &checkwords($result,$applies,@allwords);
597: # Does this resource apply?
598: if ($applies) {
599: $r->print('<br />');
600: for (my $i=0;$i<=$level*5;$i++) {
601: $r->print(' ');
602: }
603: my $href=$url;
604: if ($hash{'encrypted_'.$id} && !$env{'request.role.adv'}) {
605: $href=&Apache::lonenc::encrypted($href)
606: .'?symb='.&Apache::lonenc::encrypted($symb);
607: } else {
608: $href.='?symb='.&escape($symb);
609: }
610: $r->print('<a href="'.$href.'" target="cat">'.($title?$title:$url).
611: '</a><br />');
612: $totalfound++;
613: } elsif ($fulltext) {
614: $r->print(' .');
615: }
616: $r->rflush();
617: # Check also the dependencies of this one
618: my $dependencies=
619: &Apache::lonnet::metadata($url,'dependencies');
620: foreach (split(/\,/,$dependencies)) {
621: if (($_=~/^\/res\//) && (!$alreadyseen{$id})) {
622: &checkonthis($r,$id,$_,$level+1,'',$fulltext,undef,@allwords);
623: }
624: }
625: }
626:
627: sub checkwords {
628: my ($result,$applies,@allwords) = @_;
629: foreach (@allwords) {
630: if ($_=~/\w/) {
631: if ($result=~/$_/si) {
632: $applies++;
633: }
634: }
635: }
636: return $applies;
637: }
638:
639: sub untiehash {
640: if (tied(%hash)) {
641: untie(%hash);
642: }
643: }
644:
645: } # End of course search scoping
646:
647:
648: ######################################################################
649: ######################################################################
650:
651: =pod
652:
653: =item &print_basic_search_form()
654:
655: Prints the form for the basic search. Sorry the name is so cryptic.
656:
657: =cut
658:
659: ######################################################################
660: ######################################################################
661: sub print_basic_search_form {
662: my ($r,$closebutton,$hidden_fields) = @_;
663: my $result = ($env{'form.catalogmode'} ne 'import');
664: my $bread_crumb =
665: &Apache::lonhtmlcommon::breadcrumbs('Searching','Search_Basic',
666: $env{'form.catalogmode'} ne 'import');
667: my $scrout = &Apache::loncommon::start_page('Search').$bread_crumb;
668: if (&Apache::lonnet::allowed('bre',$env{'request.role.domain'})) {
669: # Define interface components
670: my $userelatedwords= '<label>'.
671: &mt('[_1] use related words',
672: &Apache::lonhtmlcommon::checkbox
673: ('related',$env{'form.related'},'related')).'</label>';
674: my $onlysearchdomain='<label>'.
675: &mt('[_1] only search domain [_2]',
676: &Apache::lonhtmlcommon::checkbox('domains',
677: $env{'form.domains'},
678: $r->dir_config('lonDefDomain')
679: ),
680: $r->dir_config('lonDefDomain')
681: ).'</label>';
682: my $inclext= '<label>'.
683: &mt('[_1] include external resources',
684: &Apache::lonhtmlcommon::checkbox
685: ('inclext',$env{'form.inclext'})).'</label>';
686: my $adv_search_link =
687: '<a href="/adm/searchcat?'.
688: 'phase=disp_adv&'.
689: 'catalogmode='.$env{'form.catalogmode'}.
690: '&launch='.$env{'form.launch'}.
691: '&mode='.$env{'form.mode'}.
692: '">'.&mt('Advanced Search').'</a>';
693: #
694: $scrout.='<form name="loncapa_search" method="post" '.
695: 'action="/adm/searchcat">'.
696: '<input type="hidden" name="phase" value="basic_search" />'.
697: $hidden_fields;
698: #
699: $scrout .= '<center>'.$/;
700: if ($env{'request.course.id'}) {
701: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
702: } else {
703: # No need to tell them they are searching
704: $scrout.= ('<br />'x2);
705: }
706: $scrout.='<table>'.
707: '<tr><td align="center" valign="top">'.
708: &Apache::lonhtmlcommon::textbox('basicexp',
709: $env{'form.basicexp'},50).
710: '<br />'.
711: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
712: '<td><font size="-1">'.
713: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
714: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
715: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
716: '<nobr>'.(' 'x1).$inclext.'</nobr>'.'<br />'.
717: '</font></td>'.
718: '</tr>'.$/;
719: #
720: $scrout .= '<tr><td align="center" colspan="2">'.
721: '<font size="-1">'.
722: '<input type="submit" name="basicsubmit" '.
723: 'value="'.&mt('Search').'" />'.
724: (' 'x2).$closebutton.(' 'x2).
725: &viewoptions().
726: '</font>'.
727: '</td></tr>'.$/;
728: $scrout .= '</table>'.$/.'</center>'.'</form>';
729: }
730: if ($env{'request.course.id'}) {
731: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
732: 'header' => 'Course Search',
733: 'note' => 'Enter terms or phrases, then press "Search" below',
734: 'use' => 'use related words',
735: 'full' =>'fulltext search (time consuming)',
736: 'disc' => 'search discussion postings (resources and bulletin boards)',
737: );
738: $scrout.=(<<ENDCOURSESEARCH);
739: <form name="loncapa_search" method="post" action="/adm/searchcat">
740: <center>
741: <hr />
742: <h1>$lt{'header'}</h1>
743: <input type="hidden" name="phase" value="course_search" />
744: $hidden_fields
745: <p>
746: $lt{'note'}.
747: </p>
748: <p>
749: <table>
750: <tr><td>
751: ENDCOURSESEARCH
752: $scrout.=' '.
753: &Apache::lonhtmlcommon::textbox('courseexp',
754: $env{'form.courseexp'},40);
755: my $crscheckbox =
756: &Apache::lonhtmlcommon::checkbox('crsfulltext',
757: $env{'form.crsfulltext'});
758: my $relcheckbox =
759: &Apache::lonhtmlcommon::checkbox('crsrelated',
760: $env{'form.crsrelated'});
761: my $discheckbox =
762: &Apache::lonhtmlcommon::checkbox('crsdiscuss',
763: $env{'form.crsrelated'});
764: $scrout.=(<<ENDENDCOURSE);
765: </td></tr>
766: <tr><td><label>$relcheckbox $lt{'use'}</label></td><td></td></tr>
767: <tr><td><label>$crscheckbox $lt{'full'}</label></td><td></td></tr>
768: <tr><td><label>$discheckbox $lt{'disc'}</label></td><td></td></tr>
769: </table><p>
770: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
771: </p>
772: </center>
773: </form>
774: ENDENDCOURSE
775: }
776: $scrout .= &Apache::loncommon::end_page();
777: $r->print($scrout);
778: return;
779: }
780: ######################################################################
781: ######################################################################
782:
783: =pod
784:
785: =item &advanced_search_form()
786:
787: Prints the advanced search form.
788:
789: =cut
790:
791: ######################################################################
792: ######################################################################
793: sub print_advanced_search_form{
794: my ($r,$closebutton,$hidden_fields) = @_;
795: my $bread_crumb =
796: &Apache::lonhtmlcommon::breadcrumbs('Searching','Search_Advanced',
797: $env{'form.catalogmode'} ne 'import');
798: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
799: 'reset' => 'Reset',
800: 'help' => 'Help');
801: my $advanced_buttons=<<"END";
802: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
803: <input type="reset" name="reset" value='$lt{"reset"}' />
804: $closebutton
805: END
806: my $scrout= &Apache::loncommon::start_page('Advanced Catalog Search');
807: $scrout .= <<"ENDHEADER";
808: $bread_crumb
809: <form method="post" action="/adm/searchcat" name="advsearch">
810: <p>
811: $advanced_buttons
812: ENDHEADER
813: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
814: '<input type="hidden" name="phase" value="adv_search" />';
815: my %fields=&Apache::lonmeta::fieldnames();
816: #
817: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
818: $scrout .= "<table>\n";
819: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
820: (' 'x2).&searchhelp()."</font></td></tr>\n";
821: my %related_word_search =
822: ('title' => 1,
823: 'author' => 0,
824: 'owner' => 0,
825: 'authorspace' => 0,
826: 'modifyinguser'=> 0,
827: 'keywords' => 1,
828: 'notes' => 1,
829: 'abstract' => 1,
830: 'standards'=> 1,
831: 'mime' => 1,
832: 'subject' => 1,
833: );
834: #
835: foreach my $field ('title','author','subject','owner','authorspace',
836: 'modifyinguser','keywords','notes','abstract',
837: 'standards','mime') {
838: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
839: &Apache::lonmeta::prettyinput($field,
840: $env{'form.'.$field},
841: $field,
842: 'advsearch',
843: $related_word_search{$field},
844: '</td><td align="left">',
845: $env{'form.'.$field.'_related'},
846: 50);
847: if ($related_word_search{$field}) {
848: $scrout .= 'related words';
849: } else {
850: $scrout .= '</td><td> ';
851: }
852: $scrout .= '</td></tr>'.$/;
853: }
854: foreach my $field ('lowestgradelevel','highestgradelevel') {
855: $scrout.='<tr>'.
856: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
857: '<td colspan="2">'.
858: &Apache::lonmeta::prettyinput($field,
859: $env{'form.'.$field},
860: $field,
861: 'advsearch',
862: 0).
863: '</td></tr>'.$/;
864: }
865: $scrout.='<tr><td align="right">'.
866: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
867: &Apache::loncommon::filecategoryselect('category',
868: $env{'form.category'}).
869: '</td></tr>'.$/;
870: $scrout.='<tr><td align="right" valign="top">'.
871: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
872: &Apache::loncommon::domain_select('domains',
873: $env{'form.domains'},1).
874: '<br /><label>'.
875: &mt('[_1] include external resources',
876: &Apache::lonhtmlcommon::checkbox
877: ('inclext',$env{'form.inclext'})).'</label></td></tr>'.$/;
878: #
879: # Misc metadata
880: $scrout.='<tr><td align="right" valign="top">'.
881: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
882: &Apache::lonmeta::selectbox('copyright',
883: $env{'form.copyright'},
884: \&Apache::loncommon::copyrightdescription,
885: ( undef,
886: &Apache::loncommon::copyrightids)
887: ).'</td></tr>'.$/;
888: $scrout.='<tr><td align="right" valign="top">'.
889: &titlefield(&mt('Language')).'</td><td colspan="2">'.
890: &Apache::lonmeta::selectbox('language',
891: $env{'form.language'},
892: \&Apache::loncommon::languagedescription,
893: ('any',&Apache::loncommon::languageids)
894: ).'</td></tr>';
895: $scrout .= "</table>\n";
896: #
897: # Dynamic metadata
898: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
899: $scrout .= "<table>\n";
900: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
901: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
902: foreach my $statistic
903: ({ name=>'count',
904: description=>'Network-wide number of accesses (hits)',},
905: { name=>'stdno',
906: description=>
907: 'Total number of students who have worked on this problem',},
908: { name => 'avetries',
909: description=>'Average number of tries till solved',},
910: { name => 'difficulty',
911: description=>'Degree of difficulty',},
912: { name => 'disc',
913: description=>'Degree of discrimination'}) {
914: $scrout .= '<tr><td align="right">'.
915: &titlefield(&mt($statistic->{'description'})).
916: '</td><td align="center">'.
917: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
918: 'value="" size="6" />'.
919: '</td><td align="center">'.
920: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
921: 'value="" size="6" />'.
922: '</td></tr>'.$/;
923: }
924: $scrout .= "</table>\n";
925: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
926: $scrout .= "<table>\n";
927: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
928: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
929: foreach my $evaluation
930: ( { name => 'clear',
931: description => 'Material presented in clear way'},
932: { name =>'depth',
933: description => 'Material covered with sufficient depth'},
934: { name => 'helpful',
935: description => 'Material is helpful'},
936: { name => 'correct',
937: description => 'Material appears to be correct'},
938: { name => 'technical',
939: description => 'Resource is technically correct'}){
940: $scrout .= '<tr><td align="right">'.
941: &titlefield(&mt($evaluation->{'description'})).
942: '</td><td align="center">'.
943: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
944: 'value="" size="6" />'.
945: '</td><td align="center">'.
946: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
947: 'value="" size="6" />'.
948: '</td></tr>'.$/;
949: }
950: $scrout .= "</table>\n";
951: #
952: # Creation/Modification date limits
953: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
954: $scrout .= "\n<table>\n";
955: my $cafter =
956: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
957: 'creationdate1', # fieldname
958: 0, # current value
959: '', # special
960: 1, # includeempty
961: '', # state
962: 1, # no_hh_mm_ss
963: );
964: my $cbefore =
965: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
966: 'creationdate2', # fieldname
967: 0, # current value
968: '', # special
969: 1, # includeempty
970: '', # state
971: 1, # no_hh_mm_ss
972: );
973: $scrout .= &mt('<tr><td align="right">Created between</td>'.
974: '<td>[_1]</td></tr>'.
975: '<tr><td align="right">and </td>'.
976: '<td>[_2]</td></tr>',$cafter,$cbefore);
977: my $lafter =
978: &Apache::lonhtmlcommon::date_setter('advsearch',
979: 'revisiondate1',
980: 0, # current value
981: '', # special
982: 1, # includeempty
983: '', # state
984: 1, # no_hh_mm_ss
985: );
986: my $lbefore =
987: &Apache::lonhtmlcommon::date_setter('advsearch',
988: 'revisiondate2',
989: 0, # current value
990: '', # special
991: 1, # includeempty
992: '', # state
993: 1, # no_hh_mm_ss
994: );
995: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
996: '<td>[_1]</td></tr>'.
997: '<tr><td align="right">and</td>'.
998: '<td>[_2]</td></tr>',$lafter,$lbefore);
999: $scrout.="</table>\n";
1000: $scrout.=<<ENDDOCUMENT;
1001: $advanced_buttons
1002: </form>
1003: ENDDOCUMENT
1004: $scrout .= &Apache::loncommon::end_page();
1005: $r->print($scrout);
1006: return;
1007: }
1008:
1009: ######################################################################
1010: ######################################################################
1011:
1012: =pod
1013:
1014: =item &titlefield()
1015:
1016: Inputs: title text
1017:
1018: Outputs: titletext with font wrapper
1019:
1020: =cut
1021:
1022: ######################################################################
1023: ######################################################################
1024: sub titlefield {
1025: my $title=shift;
1026: return $title;
1027: }
1028:
1029: ######################################################################
1030: ######################################################################
1031:
1032: =pod
1033:
1034: =item viewoptiontext()
1035:
1036: Inputs: codename for view option
1037:
1038: Outputs: displayed text
1039:
1040: =cut
1041:
1042: ######################################################################
1043: ######################################################################
1044: sub viewoptiontext {
1045: my $code=shift;
1046: my %desc=&Apache::lonlocal::texthash
1047: ('detailed' => "Detailed Citation View",
1048: 'xml' => 'XML/SGML',
1049: 'compact' => 'Compact View',
1050: 'fielded' => 'Fielded Format',
1051: 'summary' => 'Summary View',
1052: 'summarypreview' => 'Summary Preview',
1053: 'detailedpreview' => 'Detailed Citation Preview');
1054: return $desc{$code};
1055: }
1056:
1057: ######################################################################
1058: ######################################################################
1059:
1060: =pod
1061:
1062: =item viewoptions()
1063:
1064: Inputs: none
1065:
1066: Outputs: text for box with view options
1067:
1068: =cut
1069:
1070: ######################################################################
1071: ######################################################################
1072: sub viewoptions {
1073: my $scrout;
1074: if (! defined($env{'form.viewselect'})) {
1075: $env{'form.viewselect'}='detailed';
1076: }
1077: $scrout.=&Apache::lonmeta::selectbox('viewselect',
1078: $env{'form.viewselect'},
1079: \&viewoptiontext,
1080: sort(keys(%Views)));
1081: $scrout.= ' ';
1082: my $countselect = &Apache::lonmeta::selectbox('show',
1083: $env{'form.show'},
1084: undef,
1085: (10,20,50,100,1000,10000));
1086: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
1087: '</nobr>'.$/;
1088: return $scrout;
1089: }
1090:
1091: ######################################################################
1092: ######################################################################
1093:
1094: =pod
1095:
1096: =item searchhelp()
1097:
1098: Inputs: none
1099:
1100: Outputs: return little blurb on how to enter searches
1101:
1102: =cut
1103:
1104: ######################################################################
1105: ######################################################################
1106: sub searchhelp {
1107: return &mt('Enter words and quoted phrases');
1108: }
1109:
1110: ######################################################################
1111: ######################################################################
1112:
1113: =pod
1114:
1115: =item &get_persistent_form_data()
1116:
1117: Inputs: filename of database
1118:
1119: Outputs: returns undef on database errors.
1120:
1121: This function is the reverse of &make_persistent() for form data.
1122: Retrieve persistent data from %persistent_db. Retrieved items will have their
1123: values unescaped. If a form value already exists in $env, it will not be
1124: overwritten. Form values that are array references may have values appended
1125: to them.
1126:
1127: =cut
1128:
1129: ######################################################################
1130: ######################################################################
1131: sub get_persistent_form_data {
1132: my $filename = shift;
1133: return 0 if (! -e $filename);
1134: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1135: &GDBM_READER(),0640));
1136: #
1137: # These make sure we do not get array references printed out as 'values'.
1138: my %arrays_allowed = ('form.domains'=>1);
1139: #
1140: # Loop through the keys, looking for 'form.'
1141: foreach my $name (keys(%persistent_db)) {
1142: next if ($name !~ /^form./);
1143: # Kludgification begins!
1144: if ($name eq 'form.domains' &&
1145: $env{'form.searchmode'} eq 'basic' &&
1146: $env{'form.phase'} ne 'disp_basic') {
1147: next;
1148: }
1149: # End kludge (hopefully)
1150: next if (exists($env{$name}));
1151: my @values = map {
1152: &unescape($_);
1153: } split(',',$persistent_db{$name});
1154: next if (@values <1);
1155: if ($arrays_allowed{$name}) {
1156: $env{$name} = [@values];
1157: } else {
1158: $env{$name} = $values[0] if ($values[0]);
1159: }
1160: }
1161: untie (%persistent_db);
1162: return 1;
1163: }
1164:
1165: ######################################################################
1166: ######################################################################
1167:
1168: =pod
1169:
1170: =item &get_persistent_data()
1171:
1172: Inputs: filename of database, ref to array of values to recover.
1173:
1174: Outputs: array of values. Returns undef on error.
1175:
1176: This function is the reverse of &make_persistent();
1177: Retrieve persistent data from %persistent_db. Retrieved items will have their
1178: values unescaped. If the item contains commas (before unescaping), the
1179: returned value will be an array pointer.
1180:
1181: =cut
1182:
1183: ######################################################################
1184: ######################################################################
1185: sub get_persistent_data {
1186: my $filename = shift;
1187: my @Vars = @{shift()};
1188: my @Values; # Return array
1189: return undef if (! -e $filename);
1190: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1191: &GDBM_READER(),0640));
1192: foreach my $name (@Vars) {
1193: if (! exists($persistent_db{$name})) {
1194: push @Values, undef;
1195: next;
1196: }
1197: my @values = map {
1198: &unescape($_);
1199: } split(',',$persistent_db{$name});
1200: if (@values <= 1) {
1201: push @Values,$values[0];
1202: } else {
1203: push @Values,\@values;
1204: }
1205: }
1206: untie (%persistent_db);
1207: return @Values;
1208: }
1209:
1210: ######################################################################
1211: ######################################################################
1212:
1213: =pod
1214:
1215: =item &make_persistent()
1216:
1217: Inputs: Hash of values to save, filename of persistent database.
1218:
1219: Store variables away to the %persistent_db.
1220: Values will be escaped. Values that are array pointers will have their
1221: elements escaped and concatenated in a comma separated string.
1222:
1223: =cut
1224:
1225: ######################################################################
1226: ######################################################################
1227: sub make_persistent {
1228: my %save = %{shift()};
1229: my $filename = shift;
1230: return undef if (! tie(%persistent_db,'GDBM_File',
1231: $filename,&GDBM_WRCREAT(),0640));
1232: foreach my $name (keys(%save)) {
1233: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1234: # We handle array references, but not recursively.
1235: my $store = join(',', map { &escape($_); } @values );
1236: $persistent_db{$name} = $store;
1237: }
1238: untie(%persistent_db);
1239: return 1;
1240: }
1241:
1242: ######################################################################
1243: ######################################################################
1244:
1245: =pod
1246:
1247: =item &make_form_data_persistent()
1248:
1249: Inputs: filename of persistent database.
1250:
1251: Store most form variables away to the %persistent_db.
1252: Values will be escaped. Values that are array pointers will have their
1253: elements escaped and concatenated in a comma separated string.
1254:
1255: =cut
1256:
1257: ######################################################################
1258: ######################################################################
1259: sub make_form_data_persistent {
1260: my $r = shift;
1261: my $filename = shift;
1262: my %save;
1263: foreach (keys(%env)) {
1264: next if (!/^form/ || /submit/);
1265: $save{$_} = $env{$_};
1266: }
1267: return &make_persistent(\%save,$filename);
1268: }
1269:
1270: ######################################################################
1271: ######################################################################
1272:
1273: =pod
1274:
1275: =item &parse_advanced_search()
1276:
1277: Parse advanced search form and return the following:
1278:
1279: =over 4
1280:
1281: =item $query Scalar containing an SQL query.
1282:
1283: =item $customquery Scalar containing a custom query.
1284:
1285: =item $customshow Scalar containing commands to show custom metadata.
1286:
1287: =item $libraries_to_query Reference to array of domains to search.
1288:
1289: =back
1290:
1291: =cut
1292:
1293: ######################################################################
1294: ######################################################################
1295: sub parse_advanced_search {
1296: my ($r,$closebutton,$hidden_fields)=@_;
1297: my @BasicFields = ('title','author','subject','keywords','url','version',
1298: 'notes','abstract','extension','owner','authorspace',
1299: # 'custommetadata','customshow',
1300: 'modifyinguser','standards','mime');
1301: my @StatsFields = &statfields();
1302: my @EvalFields = &evalfields();
1303: my $fillflag=0;
1304: my $pretty_search_string = "";
1305: # Clean up fields for safety
1306: for my $field (@BasicFields,
1307: 'creationdatestart_month','creationdatestart_day',
1308: 'creationdatestart_year','creationdateend_month',
1309: 'creationdateend_day','creationdateend_year',
1310: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1311: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1312: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1313: $env{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1314: }
1315: foreach ('mode','form','element') {
1316: # is this required? Hmmm.
1317: next if (! exists($env{'form.'.$_}));
1318: $env{'form.'.$_}=&unescape($env{'form.'.$_});
1319: $env{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1320: }
1321: # Preprocess the category form element.
1322: $env{'form.category'} = 'any' if (! defined($env{'form.category'}) ||
1323: ref($env{'form.category'}));
1324: #
1325: # Check to see if enough information was filled in
1326: foreach my $field (@BasicFields) {
1327: if (&filled($env{'form.'.$field})) {
1328: $fillflag++;
1329: }
1330: }
1331: foreach my $field (@StatsFields,@EvalFields) {
1332: if (&filled($env{'form.'.$field.'_max'})) {
1333: $fillflag++;
1334: }
1335: if (&filled($env{'form.'.$field.'_min'})) {
1336: $fillflag++;
1337: }
1338: }
1339:
1340: for my $field ('lowestgradelevel','highestgradelevel') {
1341: if ( $env{'form.'.$field} =~ /^\d+$/ &&
1342: $env{'form.'.$field} > 0) {
1343: $fillflag++;
1344: }
1345: }
1346: if (! $fillflag) {
1347: &output_blank_field_error($r,$closebutton,
1348: 'phase=disp_adv',$hidden_fields);
1349: return ;
1350: }
1351: # Turn the form input into a SQL-based query
1352: my $query='';
1353: my @queries;
1354: my $font = '<font color="#800000" face="helvetica">';
1355: # Evaluate logical expression AND/OR/NOT phrase fields.
1356: foreach my $field (@BasicFields) {
1357: next if (!defined($env{'form.'.$field}) || $env{'form.'.$field} eq '');
1358: my ($error,$SQLQuery) =
1359: &process_phrase_input($env{'form.'.$field},
1360: $env{'form.'.$field.'_related'},$field);
1361: if (defined($error)) {
1362: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv',
1363: $hidden_fields,$field);
1364: return;
1365: } else {
1366: $pretty_search_string .=
1367: $font.$field.'</font>: '.$env{'form.'.$field};
1368: if ($env{'form.'.$field.'_related'}) {
1369: my @Words =
1370: &Apache::loncommon::get_related_words
1371: ($env{'form.'.$field});
1372: if (@Words) {
1373: $pretty_search_string.= ' with related words: '.
1374: join(', ',@Words[0..4]);
1375: } else {
1376: $pretty_search_string.= ' with related words.';
1377: }
1378: }
1379: $pretty_search_string .= '<br />';
1380: push (@queries,$SQLQuery);
1381: }
1382: }
1383: #
1384: # Make the 'mime' from 'form.category' and 'form.extension'
1385: #
1386: my $searchphrase;
1387: if (exists($env{'form.category'}) &&
1388: $env{'form.category'} !~ /^\s*$/ &&
1389: $env{'form.category'} ne 'any') {
1390: my @extensions = &Apache::loncommon::filecategorytypes
1391: ($env{'form.category'});
1392: if (scalar(@extensions) > 0) {
1393: $searchphrase = join(' OR ',@extensions);
1394: }
1395: }
1396: if (defined($searchphrase)) {
1397: my ($error,$SQLsearch) = &process_phrase_input($searchphrase,0,'mime');
1398: push @queries,$SQLsearch;
1399: $pretty_search_string .=$font.'mime</font> contains <b>'.
1400: $searchphrase.'</b><br />';
1401: }
1402: #
1403: # Evaluate option lists
1404: if ($env{'form.lowestgradelevel'} &&
1405: $env{'form.lowestgradelevel'} ne '0' &&
1406: $env{'form.lowestgradelevel'} =~ /^\d+$/) {
1407: push(@queries,
1408: '(lowestgradelevel>='.$env{'form.lowestgradelevel'}.')');
1409: $pretty_search_string.="lowestgradelevel>=".
1410: $env{'form.lowestgradelevel'}."<br />\n";
1411: }
1412: if ($env{'form.highestgradelevel'} &&
1413: $env{'form.highestgradelevel'} ne '0' &&
1414: $env{'form.highestgradelevel'} =~ /^\d+$/) {
1415: push(@queries,
1416: '(highestgradelevel<='.$env{'form.highestgradelevel'}.')');
1417: $pretty_search_string.="highestgradelevel<=".
1418: $env{'form.highestgradelevel'}."<br />\n";
1419: }
1420: if ($env{'form.language'} and $env{'form.language'} ne 'any') {
1421: push @queries,"(language like \"$env{'form.language'}\")";
1422: $pretty_search_string.=$font."language</font>= ".
1423: &Apache::loncommon::languagedescription($env{'form.language'}).
1424: "<br />\n";
1425: }
1426: if ($env{'form.copyright'} and $env{'form.copyright'} ne 'any') {
1427: push @queries,"(copyright like \"$env{'form.copyright'}\")";
1428: $pretty_search_string.=$font."copyright</font> = ".
1429: &Apache::loncommon::copyrightdescription($env{'form.copyright'}).
1430: "<br />\n";
1431: }
1432: #
1433: # Statistics
1434: foreach my $field (@StatsFields,@EvalFields) {
1435: my ($min,$max);
1436: if (exists($env{'form.'.$field.'_min'}) &&
1437: $env{'form.'.$field.'_min'} ne '') {
1438: $min = $env{'form.'.$field.'_min'};
1439: }
1440: if (exists($env{'form.'.$field.'_max'}) &&
1441: $env{'form.'.$field.'_max'} ne '') {
1442: $max = $env{'form.'.$field.'_max'};
1443: }
1444: next if (! defined($max) && ! defined($min));
1445: if (defined($min) && defined($max)) {
1446: ($min,$max) = sort {$a <=>$b} ($min,$max);
1447: }
1448: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1449: push(@queries,'('.$field.'>'.$min.')');
1450: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1451: }
1452: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1453: push(@queries,'('.$field.'<'.$max.')');
1454: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1455: }
1456: }
1457: #
1458: # Evaluate date windows
1459: my $cafter =
1460: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1461: my $cbefore =
1462: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1463: if ($cafter > $cbefore) {
1464: my $tmp = $cafter;
1465: $cafter = $cbefore;
1466: $cbefore = $tmp;
1467: }
1468: my $mafter =
1469: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1470: my $mbefore =
1471: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1472: if ($mafter > $mbefore) {
1473: my $tmp = $mafter;
1474: $mafter = $mbefore;
1475: $mbefore = $tmp;
1476: }
1477: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1478: $mafter,$mbefore);
1479: if (defined($error)) {
1480: &output_date_error($r,$error,$closebutton,$hidden_fields);
1481: } elsif (defined($datequery)) {
1482: # Here is where you would set up pretty_search_string to output
1483: # date query information.
1484: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1485: push @queries,$datequery;
1486: }
1487: #
1488: # Process form information for custom metadata querying
1489: my $customquery=undef;
1490: ##
1491: ## The custom metadata search was removed q long time ago mostly
1492: ## because I was unable to figureout exactly how it worked and could
1493: ## not imagine people actually using it. MH
1494: ##
1495: # if ($env{'form.custommetadata'}) {
1496: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1497: # $env{'form.custommetadata'}."</b><br />\n";
1498: # $customquery=&build_custommetadata_query('custommetadata',
1499: # $env{'form.custommetadata'});
1500: # }
1501: my $customshow=undef;
1502: # if ($env{'form.customshow'}) {
1503: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1504: # $env{'form.customshow'}."</b><br />\n";
1505: # $customshow=$env{'form.customshow'};
1506: # $customshow=~s/[^\w\s]//g;
1507: # my @fields=split(/\s+/,$customshow);
1508: # $customshow=join(" ",@fields);
1509: # }
1510: ##
1511: ## Deal with restrictions to given domains
1512: ##
1513: my ($libraries_to_query,$pretty_domains_string) = &parse_domain_restrictions();
1514: if ($pretty_domains_string) {
1515: $pretty_search_string .= $pretty_domains_string."<br />\n";
1516: }
1517: #
1518: if (@queries) {
1519: $query="SELECT * FROM metadata WHERE (".join(") AND (",@queries).')';
1520: } elsif ($customquery) {
1521: $query = '';
1522: }
1523: #&Apache::lonnet::logthis('advanced query = '.$/.$query);
1524: return ($query,$customquery,$customshow,$libraries_to_query,
1525: $pretty_search_string);
1526: }
1527:
1528: sub parse_domain_restrictions {
1529: my $libraries_to_query = undef;
1530: # $env{'form.domains'} can be either a scalar or an array reference.
1531: # We need an array.
1532: if (! exists($env{'form.domains'}) || $env{'form.domains'} eq '') {
1533: return (undef,'',undef);
1534: }
1535: my @allowed_domains = &Apache::loncommon::get_env_multiple('form.domains');
1536: #
1537: my %domain_hash = ();
1538: my $pretty_domains_string;
1539: foreach (@allowed_domains) {
1540: $domain_hash{$_}++;
1541: }
1542: if ($domain_hash{'any'}) {
1543: $pretty_domains_string = "In all LON-CAPA domains.";
1544: } else {
1545: if (@allowed_domains > 1) {
1546: $pretty_domains_string = "In LON-CAPA domains:";
1547: } else {
1548: $pretty_domains_string = "In LON-CAPA domain ";
1549: }
1550: foreach (sort @allowed_domains) {
1551: $pretty_domains_string .= "<b>".$_."</b> ";
1552: }
1553: foreach (keys(%Apache::lonnet::libserv)) {
1554: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1555: push @$libraries_to_query,$_;
1556: }
1557: }
1558: }
1559: return ($libraries_to_query,
1560: $pretty_domains_string);
1561: }
1562:
1563: ######################################################################
1564: ######################################################################
1565:
1566: =pod
1567:
1568: =item &parse_basic_search()
1569:
1570: Parse the basic search form and return a scalar containing an sql query.
1571:
1572: =cut
1573:
1574: ######################################################################
1575: ######################################################################
1576: sub parse_basic_search {
1577: my ($r,$closebutton)=@_;
1578: #
1579: # Clean up fields for safety
1580: for my $field ('basicexp') {
1581: $env{"form.$field"}=~s/[^\w\s\'\"\!\(\)\-]//g;
1582: }
1583: foreach ('mode','form','element') {
1584: # is this required? Hmmm.
1585: next unless (exists($env{"form.$_"}));
1586: $env{"form.$_"}=&unescape($env{"form.$_"});
1587: $env{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1588: }
1589: my ($libraries_to_query,$pretty_domains_string) = &parse_domain_restrictions();
1590: #
1591: # Check to see if enough of a query is filled in
1592: my $search_string = $env{'form.basicexp'};
1593: if (! &filled($search_string)) {
1594: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1595: return OK;
1596: }
1597: my $pretty_search_string=$search_string;
1598: my @Queries;
1599: my $searchfield = 'concat_ws(" ",'.join(',',
1600: ('title','author','subject',
1601: 'notes','abstract','keywords')
1602: ).')';
1603: my ($error,$SQLQuery) = &process_phrase_input($search_string,
1604: $env{'form.related'},
1605: $searchfield);
1606: if ($error) {
1607: &output_unparsed_phrase_error($r,$closebutton,'phase=disp_basic',
1608: '','basicexp');
1609: return;
1610: }
1611: push(@Queries,$SQLQuery);
1612: #foreach my $q (@Queries) {
1613: # &Apache::lonnet::logthis(' '.$q);
1614: #}
1615: my $final_query = 'SELECT * FROM metadata WHERE '.join(" AND ",@Queries);
1616: #
1617: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1618: $pretty_search_string .= ' '.$pretty_domains_string;
1619: }
1620: $pretty_search_string .= "<br />\n";
1621: $pretty_search_string =~ s:^<br /> and ::;
1622: #&Apache::lonnet::logthis('simple search final query = '.$/.$final_query);
1623: return ($final_query,$pretty_search_string,
1624: $libraries_to_query);
1625: }
1626:
1627:
1628: ###############################################################
1629: ###############################################################
1630:
1631: my @Phrases;
1632:
1633: sub concat {
1634: my ($item) = @_;
1635: my $results = '';
1636: foreach (@$item) {
1637: if (ref($_) eq 'ARRAY') {
1638: $results .= join(' ',@$_);
1639: }
1640: }
1641: return $results;
1642: }
1643:
1644: sub process_phrase_input {
1645: my ($phrase,$related,$field)=@_;
1646: #&Apache::lonnet::logthis('phrase = :'.$phrase.':');
1647: my $grammar = <<'ENDGRAMMAR';
1648: searchphrase:
1649: expression /^\Z/ {
1650: # &Apache::lonsearchcat::print_item(\@item,0);
1651: [@item];
1652: }
1653: expression:
1654: phrase(s) {
1655: [@item];
1656: }
1657: phrase:
1658: orword {
1659: [@item];
1660: }
1661: | andword {
1662: [@item];
1663: }
1664: | minusword {
1665: unshift(@::Phrases,$item[1]->[0]);
1666: unshift(@::Phrases,$item[1]->[1]);
1667: [@item];
1668: }
1669: | word {
1670: unshift(@::Phrases,$item[1]);
1671: [@item];
1672: }
1673: #
1674: orword:
1675: word 'OR' phrase {
1676: unshift(@::Phrases,'OR');
1677: unshift(@::Phrases,$item[1]);
1678: [@item];
1679: }
1680: | word 'or' phrase {
1681: unshift(@::Phrases,'OR');
1682: unshift(@::Phrases,$item[1]);
1683: [@item];
1684: }
1685: | minusword 'OR' phrase {
1686: unshift(@::Phrases,'OR');
1687: unshift(@::Phrases,$item[1]->[0]);
1688: unshift(@::Phrases,$item[1]->[1]);
1689: [@item];
1690: }
1691: | minusword 'or' phrase {
1692: unshift(@::Phrases,'OR');
1693: unshift(@::Phrases,$item[1]->[0]);
1694: unshift(@::Phrases,$item[1]->[1]);
1695: [@item];
1696: }
1697: andword:
1698: word phrase {
1699: unshift(@::Phrases,'AND');
1700: unshift(@::Phrases,$item[1]);
1701: [@item];
1702: }
1703: | minusword phrase {
1704: unshift(@::Phrases,'AND');
1705: unshift(@::Phrases,$item[1]->[0]);
1706: unshift(@::Phrases,$item[1]->[1]);
1707: [@item];
1708: }
1709: #
1710: minusword:
1711: '-' word {
1712: [$item[2],'NOT'];
1713: }
1714: word:
1715: "'" term(s) "'" {
1716: &Apache::lonsearchcat::concat(\@item);
1717: }
1718: | '"' term(s) '"' {
1719: &Apache::lonsearchcat::concat(\@item);
1720: }
1721: | term {
1722: $item[1];
1723: }
1724: term:
1725: /[\w\Q:!@#$%^&*()+_=|{}<>,.;\\\/?\E]+/ {
1726: $item[1];
1727: }
1728: ENDGRAMMAR
1729: #
1730: # The end result of parsing the phrase with the grammar is an array
1731: # @::Phrases.
1732: # $phrase = "gene splicing" or cat -> "gene splicing","OR","cat"
1733: # $phrase = "genetic engineering" -dna ->
1734: # "genetic engineering","AND","NOT","dna"
1735: # $phrase = cat or dog -poodle -> "cat","OR","dog","AND","NOT","poodle"
1736: undef(@::Phrases);
1737: my $p = new Parse::RecDescent($grammar);
1738: if (! defined($p->searchphrase($phrase))) {
1739: &Apache::lonnet::logthis('lonsearchcat:unable to process:'.$phrase);
1740: return 'Unable to process phrase '.$phrase;
1741: }
1742: #
1743: # Go through the phrases and make sense of them.
1744: # Apply modifiers NOT OR and AND to the phrases.
1745: my @NewPhrases;
1746: while(@::Phrases) {
1747: my $phrase = shift(@::Phrases);
1748: # &Apache::lonnet::logthis('phrase = '.$phrase);
1749: my $phrasedata;
1750: if ($phrase =~ /^(NOT|OR|AND)$/) {
1751: if ($phrase eq 'OR') {
1752: $phrasedata->{'or'}++;
1753: if (! @::Phrases) { $phrasedata = undef; last; }
1754: $phrase = shift(@::Phrases);
1755: } elsif ($phrase eq 'AND') {
1756: $phrasedata->{'and'}++;
1757: if (! @::Phrases) { $phrasedata = undef; last; }
1758: $phrase = shift(@::Phrases);
1759: }
1760: if ($phrase eq 'NOT') {
1761: $phrasedata->{'negate'}++;
1762: if (! @::Phrases) { $phrasedata = undef; last; }
1763: $phrase = shift(@::Phrases);
1764: }
1765: }
1766: $phrasedata->{'phrase'} = $phrase;
1767: if ($related) {
1768: my @NewWords;
1769: (undef,@NewWords) = &related_version($phrasedata->{'phrase'});
1770: $phrasedata->{'related_words'} = \@NewWords;
1771: }
1772: push(@NewPhrases,$phrasedata);
1773: }
1774: #
1775: # Actually build the sql query from the phrases
1776: my $SQLQuery;
1777: foreach my $phrase (@NewPhrases) {
1778: my $query;
1779: if ($phrase->{'negate'}) {
1780: $query .= $field.' NOT LIKE "%'.$phrase->{'phrase'}.'%"';
1781: } else {
1782: $query .= $field.' LIKE "%'.$phrase->{'phrase'}.'%"';
1783: }
1784: foreach my $related (@{$phrase->{'related_words'}}) {
1785: if ($phrase->{'negate'}) {
1786: $query .= ' AND '.$field.' NOT LIKE "%'.$related.'%"';
1787: } else {
1788: $query .= ' OR '.$field.' LIKE "%'.$related.'%"';
1789: }
1790: }
1791: if ($SQLQuery) {
1792: if ($phrase->{'or'}) {
1793: $SQLQuery .= ' OR ('.$query.')';
1794: } else {
1795: $SQLQuery .= ' AND ('.$query.')';
1796: }
1797: } else {
1798: $SQLQuery = '('.$query.')';
1799: }
1800: }
1801: #
1802: # &Apache::lonnet::logthis("SQLQuery = $SQLQuery");
1803: #
1804: return undef,$SQLQuery;
1805: }
1806:
1807: ######################################################################
1808: ######################################################################
1809:
1810: =pod
1811:
1812: =item &related_version()
1813:
1814: Modifies an input string to include related words. Words in the string
1815: are replaced with parenthesized lists of 'OR'd words. For example
1816: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1817:
1818: Note: Using this twice on a string is probably silly.
1819:
1820: =cut
1821:
1822: ######################################################################
1823: ######################################################################
1824: sub related_version {
1825: my ($word) = @_;
1826: return (undef) if (lc($word) =~ /\b(or|and|not)\b/);
1827: my @Words = &Apache::loncommon::get_related_words($word);
1828: # Only use 4 related words
1829: @Words = ($#Words>4? @Words[0..4] : @Words);
1830: my $result = join " OR ", ($word,@Words);
1831: return $result,sort(@Words);
1832: }
1833:
1834:
1835: ######################################################################
1836: ######################################################################
1837:
1838: =pod
1839:
1840: =item &build_custommetadata_query()
1841:
1842: Constructs a custom metadata query using a rather heinous regular
1843: expression.
1844:
1845: =cut
1846:
1847: ######################################################################
1848: ######################################################################
1849: sub build_custommetadata_query {
1850: my ($field_name,$logic_statement)=@_;
1851: my $q=new Text::Query('abc',
1852: -parse => 'Text::Query::ParseAdvanced',
1853: -build => 'Text::Query::BuildAdvancedString');
1854: $q->prepare($logic_statement);
1855: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1856: # quick fix to change literal into xml tag-matching
1857: # will eventually have to write a separate builder module
1858: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1859: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1860: /\\<$1\\>?# \<wordone\>
1861: \[\^\\<\]?# [^\<]
1862: \*$2\[\^\\<\]?# *wordtwo[^\<]
1863: \*\\<\\\/$1\\>?# *\<\/wordone\>
1864: /g;
1865: return $matchexp;
1866: }
1867:
1868:
1869: ######################################################################
1870: ######################################################################
1871:
1872: =pod
1873:
1874: =item &build_date_queries()
1875:
1876: Builds a SQL logic query to check time/date entries.
1877: Also reports errors (check for /^Incorrect/).
1878:
1879: =cut
1880:
1881: ######################################################################
1882: ######################################################################
1883: sub build_date_queries {
1884: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1885: my ($result,$error,$pretty_string);
1886: #
1887: # Verify the input
1888: if (! defined($cafter) && ! defined($cbefore) &&
1889: ! defined($mafter) && ! defined($mbefore)) {
1890: # This is an okay situation, so return undef for the error
1891: return (undef,undef,undef);
1892: }
1893: if ((defined($cafter) && ! defined($cbefore)) ||
1894: (defined($cbefore) && ! defined($cafter))) {
1895: # This is bad, so let them know
1896: $error = &mt('Incorrect entry for the creation date. '.
1897: 'You must specify both the beginning and ending dates.');
1898: }
1899: if (! defined($error) &&
1900: ((defined($mafter) && ! defined($mbefore)) ||
1901: (defined($mbefore) && ! defined($mafter)))) {
1902: # This is also bad, so let them know
1903: $error = &mt('Incorrect entry for the last revision date. '.
1904: 'You must specify both the beginning and ending dates.');
1905: }
1906: if (! defined($error)) {
1907: #
1908: # Build the queries
1909: my @queries;
1910: if (defined($cbefore) && defined($cafter)) {
1911: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1912: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1913: # Correct for year being relative to 1900
1914: $cayear+=1900; $cbyear+=1900;
1915: my $cquery=
1916: '(creationdate BETWEEN '.
1917: "'".$cayear.'-'.$camon.'-'.$caday."'".
1918: ' AND '.
1919: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1920: $pretty_string .= '<br />' if (defined($pretty_string));
1921: $pretty_string .=
1922: &mt('created between [_1] and [_2]',
1923: &Apache::lonlocal::locallocaltime($cafter),
1924: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1925: push(@queries,$cquery);
1926: $pretty_string =~ s/ 00:00:00//g;
1927: }
1928: if (defined($mbefore) && defined($mafter)) {
1929: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1930: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1931: # Correct for year being relative to 1900
1932: $mayear+=1900; $mbyear+=1900;
1933: my $mquery=
1934: '(lastrevisiondate BETWEEN '.
1935: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1936: ' AND '.
1937: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1938: push(@queries,$mquery);
1939: $pretty_string .= '<br />' if (defined($pretty_string));
1940: $pretty_string .=
1941: &mt('last revised between [_1] and [_2]',
1942: &Apache::lonlocal::locallocaltime($mafter),
1943: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1944: $pretty_string =~ s/ 00:00:00//g;
1945: }
1946: if (@queries) {
1947: $result .= join(" AND ",@queries);
1948: }
1949: }
1950: return ($result,$error,$pretty_string);
1951: }
1952:
1953: ######################################################################
1954: ######################################################################
1955:
1956: =pod
1957:
1958: =item ©right_check()
1959:
1960: Inputs: $Metadata, a hash pointer of metadata for a resource.
1961:
1962: Returns: 1 if the resource is available to the user making the query,
1963: 0 otherwise.
1964:
1965: =cut
1966:
1967: ######################################################################
1968: ######################################################################
1969: sub copyright_check {
1970: my $Metadata = shift;
1971: # Check copyright tags and skip results the user cannot use
1972: my (undef,undef,$resdom,$resname) = split('/',
1973: $Metadata->{'url'});
1974: # Check for priv
1975: if (($Metadata->{'copyright'} eq 'priv') &&
1976: (($env{'user.name'} ne $resname) &&
1977: ($env{'user.domain'} ne $resdom))) {
1978: return 0;
1979: }
1980: # Check for domain
1981: if (($Metadata->{'copyright'} eq 'domain') &&
1982: ($env{'user.domain'} ne $resdom)) {
1983: return 0;
1984: }
1985: return 1;
1986: }
1987:
1988: ######################################################################
1989: ######################################################################
1990:
1991: =pod
1992:
1993: =item &ensure_db_and_table()
1994:
1995: Ensure we can get lonmysql to connect to the database and the table we
1996: need exists.
1997:
1998: Inputs: $r, table id
1999:
2000: Returns: undef on error, 1 if the table exists.
2001:
2002: =cut
2003:
2004: ######################################################################
2005: ######################################################################
2006: sub ensure_db_and_table {
2007: my ($r,$table) = @_;
2008: ##
2009: ## Sanity check the table id.
2010: ##
2011: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2012: $r->print("Unable to retrieve search results. ".
2013: "Unable to determine the table results were stored in. ".
2014: &Apache::loncommon::end_page());
2015: return undef;
2016: }
2017: ##
2018: ## Make sure we can connect and the table exists.
2019: ##
2020: my $connection_result = &Apache::lonmysql::connect_to_db();
2021: if (!defined($connection_result)) {
2022: $r->print("Unable to connect to the MySQL database where your results".
2023: " are stored.".
2024: &Apache::loncommon::end_page());
2025: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
2026: " connect to database.");
2027: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2028: return undef;
2029: }
2030: my $table_check = &Apache::lonmysql::check_table($table);
2031: if (! defined($table_check)) {
2032: $r->print("A MySQL error has occurred.</form>".
2033: &Apache::loncommon::end_page());
2034: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
2035: " of table ".$table);
2036: return undef;
2037: } elsif (! $table_check) {
2038: $r->print("The table of results could not be found.");
2039: &Apache::lonnet::logthis("The user requested a table, ".$table.
2040: ", that could not be found.");
2041: return undef;
2042: }
2043: return 1;
2044: }
2045:
2046: ######################################################################
2047: ######################################################################
2048:
2049: =pod
2050:
2051: =item &print_sort_form()
2052:
2053: The sort feature is not implemented at this time. This form just prints
2054: a link to change the search query.
2055:
2056: =cut
2057:
2058: ######################################################################
2059: ######################################################################
2060: sub print_sort_form {
2061: my ($r,$pretty_query_string) = @_;
2062:
2063: ##
2064: my %SortableFields=&Apache::lonlocal::texthash(
2065: id => 'Default',
2066: title => 'Title',
2067: author => 'Author',
2068: subject => 'Subject',
2069: url => 'URL',
2070: version => 'Version Number',
2071: mime => 'Mime type',
2072: lang => 'Language',
2073: owner => 'Owner/Publisher',
2074: copyright => 'Copyright',
2075: hostname => 'Host',
2076: creationdate => 'Creation Date',
2077: lastrevisiondate => 'Revision Date'
2078: );
2079: ##
2080: my $table = $env{'form.table'};
2081: return if (! &ensure_db_and_table($r,$table));
2082: ##
2083: ## Get the number of results
2084: ##
2085: my $total_results = &Apache::lonmysql::number_of_rows($table);
2086: if (! defined($total_results)) {
2087: $r->print("A MySQL error has occurred.</form>".
2088: &Apache::loncommon::end_page());
2089: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2090: " of rows in table ".$table);
2091: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2092: return;
2093: }
2094: my $js =<<END;
2095: <script type="text/javascript">
2096: function change_sort() {
2097: var newloc = "/adm/searchcat?phase=results";
2098: newloc += "&persistent_db_id=$env{'form.persistent_db_id'}";
2099: newloc += "&sortby=";
2100: newloc += document.forms.statusform.elements.sortby.value;
2101: parent.resultsframe.location= newloc;
2102: }
2103: </script>
2104: END
2105:
2106: my $start_page = &Apache::loncommon::start_page('Results',$js,
2107: {'only_body' => 1});
2108: my $breadcrumbs=
2109: &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching',
2110: $env{'form.catalogmode'} ne 'import');
2111:
2112: my $result = <<END;
2113: $start_page
2114: $breadcrumbs
2115: <form name="statusform" action="" method="post" target="_top">
2116: <input type="hidden" name="catalogmode" value="import" />
2117: <input type="hidden" name="Queue" value="" />
2118: END
2119:
2120: #<h2>Sort Results</h2>
2121: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
2122: # $env{'form.sortby'} = 'id' if (! defined($env{'form.sortby'}));
2123: # foreach (keys(%SortableFields)) {
2124: # $result.="<option name=\"$_\"";
2125: # if ($_ eq $env{'form.sortby'}) {
2126: # $result.=" selected ";
2127: # }
2128: # $result.=" >$SortableFields{$_}</option>\n";
2129: # }
2130: # $result.="</select>\n";
2131: my $revise = &revise_button();
2132: $result.=<<END;
2133: <p>
2134: There are $total_results matches to your query. $revise
2135: </p><p>
2136: Search:$pretty_query_string
2137: </p>
2138: </form>
2139: END
2140: $r->print($result.&Apache::loncommon::end_page());
2141: return;
2142: }
2143:
2144: #####################################################################
2145: #####################################################################
2146:
2147: =pod
2148:
2149: =item MySQL Table Description
2150:
2151: MySQL table creation requires a precise description of the data to be
2152: stored. The use of the correct types to hold data is vital to efficient
2153: storage and quick retrieval of records. The columns must be described in
2154: the following format:
2155:
2156: =cut
2157:
2158: #####################################################################
2159: #####################################################################
2160: #
2161: # These should probably be scoped but I don't have time right now...
2162: #
2163: my @Datatypes;
2164: my @Fullindicies;
2165:
2166: ######################################################################
2167: ######################################################################
2168:
2169: =pod
2170:
2171: =item &create_results_table()
2172:
2173: Creates the table of search results by calling lonmysql. Stores the
2174: table id in $env{'form.table'}
2175:
2176: Inputs: none.
2177:
2178: Returns: the identifier of the table on success, undef on error.
2179:
2180: =cut
2181:
2182: ######################################################################
2183: ######################################################################
2184: sub set_up_table_structure {
2185: my ($datatypes,$fullindicies) =
2186: &LONCAPA::lonmetadata::describe_metadata_storage();
2187: # Copy the table description before modifying it...
2188: @Datatypes = @{$datatypes};
2189: unshift(@Datatypes,{name => 'id',
2190: type => 'MEDIUMINT',
2191: restrictions => 'UNSIGNED NOT NULL',
2192: primary_key => 'yes',
2193: auto_inc => 'yes' });
2194: @Fullindicies = @{$fullindicies};
2195: return;
2196: }
2197:
2198: sub create_results_table {
2199: &set_up_table_structure();
2200: my $table = &Apache::lonmysql::create_table
2201: ( { columns => \@Datatypes,
2202: FULLTEXT => [{'columns' => \@Fullindicies},],
2203: } );
2204: if (defined($table)) {
2205: $env{'form.table'} = $table;
2206: return $table;
2207: }
2208: return undef; # Error...
2209: }
2210:
2211: ######################################################################
2212: ######################################################################
2213:
2214: =pod
2215:
2216: =item Search Status update functions
2217:
2218: Each of the following functions changes the values of one of the
2219: input fields used to display the search status to the user. The names
2220: should be explanatory.
2221:
2222: Inputs: Apache request handler ($r), text to display.
2223:
2224: Returns: Nothing.
2225:
2226: =over 4
2227:
2228: =item &update_count_status()
2229:
2230: =item &update_status()
2231:
2232: =item &update_seconds()
2233:
2234: =back
2235:
2236: =cut
2237:
2238: ######################################################################
2239: ######################################################################
2240: sub update_count_status {
2241: my ($r,$text) = @_;
2242: $text =~ s/\'/\\\'/g;
2243: $r->print
2244: ("<script>document.statusform.count.value = ' $text'</script>\n");
2245: $r->rflush();
2246: }
2247:
2248: sub update_status {
2249: my ($r,$text) = @_;
2250: $text =~ s/\'/\\\'/g;
2251: $r->print
2252: ("<script>document.statusform.status.value = ' $text'</script>\n");
2253: $r->rflush();
2254: }
2255:
2256: {
2257: my $max_time = 300; # seconds for the search to complete
2258: my $start_time = 0;
2259: my $last_time = 0;
2260:
2261: sub reset_timing {
2262: $start_time = 0;
2263: $last_time = 0;
2264: }
2265:
2266: sub time_left {
2267: if ($start_time == 0) {
2268: $start_time = time;
2269: }
2270: my $time_left = $max_time - (time - $start_time);
2271: $time_left = 0 if ($time_left < 0);
2272: return $time_left;
2273: }
2274:
2275: sub update_seconds {
2276: my ($r) = @_;
2277: my $time = &time_left();
2278: if (($last_time-$time) > 0) {
2279: $r->print("<script>".
2280: "document.statusform.seconds.value = '$time'".
2281: "</script>\n");
2282: $r->rflush();
2283: }
2284: $last_time = $time;
2285: }
2286:
2287: }
2288:
2289: ######################################################################
2290: ######################################################################
2291:
2292: =pod
2293:
2294: =item &revise_button()
2295:
2296: Inputs: None
2297:
2298: Returns: html string for a 'revise search' button.
2299:
2300: =cut
2301:
2302: ######################################################################
2303: ######################################################################
2304: sub revise_button {
2305: my $revise_phase = 'disp_basic';
2306: $revise_phase = 'disp_adv' if ($env{'form.searchmode'} eq 'advanced');
2307: my $newloc = '/adm/searchcat'.
2308: '?persistent_db_id='.$env{'form.persistent_db_id'}.
2309: '&cleargroupsort=1'.
2310: '&phase='.$revise_phase;
2311: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2312: qq{ onClick="parent.location='$newloc';" /> };
2313: return $result;
2314: }
2315:
2316: ######################################################################
2317: ######################################################################
2318:
2319: =pod
2320:
2321: =item &run_search()
2322:
2323: Executes a search query by sending it the the other servers and putting the
2324: results into MySQL.
2325:
2326: =cut
2327:
2328: ######################################################################
2329: ######################################################################
2330: sub run_search {
2331: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
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: {'only_body' => 1});
2339: my $breadcrumbs =
2340: &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching',
2341: $env{'form.catalogmode'} ne 'import');
2342: $r->print(<<END);
2343: $start_page
2344: $breadcrumbs
2345: <form name="statusform" action="" method="post">
2346: <input type="hidden" name="Queue" value="" />
2347: END
2348: # Remove leading and trailing <br />
2349: $pretty_string =~ s:^\s*<br />::i;
2350: $pretty_string =~ s:(<br />)*\s*$::im;
2351: my @Lines = split("<br />",$pretty_string);
2352: # I keep getting blank items at the end of the list, hence the following:
2353: while ($Lines[-1] =~ /^\s*$/ && @Lines) {
2354: pop(@Lines);
2355: }
2356: if (@Lines > 2) {
2357: $pretty_string = join '<br />',(@Lines[0..2],'....<br />');
2358: }
2359: $r->print(&mt("Search: [_1]",$pretty_string));
2360: $r->rflush();
2361: #
2362: # Determine the servers we need to contact.
2363: my @Servers_to_contact;
2364: if (defined($serverlist)) {
2365: if (ref($serverlist) eq 'ARRAY') {
2366: @Servers_to_contact = @$serverlist;
2367: } else {
2368: @Servers_to_contact = ($serverlist);
2369: }
2370: } else {
2371: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2372: }
2373: my %Server_status;
2374: #
2375: # Check on the mysql table we will use to store results.
2376: my $table =$env{'form.table'};
2377: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2378: $r->print("Unable to determine table id to store search results in.".
2379: "The search has been aborted.".
2380: &Apache::loncommon::end_page());
2381: return;
2382: }
2383: my $table_status = &Apache::lonmysql::check_table($table);
2384: if (! defined($table_status)) {
2385: $r->print("Unable to determine status of table.".
2386: &Apache::loncommon::end_page());
2387: &Apache::lonnet::logthis("Bogus table id of $table for ".
2388: "$env{'user.name'} @ $env{'user.domain'}");
2389: &Apache::lonnet::logthis("lonmysql error = ".
2390: &Apache::lonmysql::get_error());
2391: return;
2392: }
2393: if (! $table_status) {
2394: &Apache::lonnet::logthis("lonmysql error = ".
2395: &Apache::lonmysql::get_error());
2396: &Apache::lonnet::logthis("lonmysql debug = ".
2397: &Apache::lonmysql::get_debug());
2398: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2399: $r->print("The table id,$table, we tried to use is invalid.".
2400: "The search has been aborted.".
2401: &Apache::loncommon::end_page());
2402: return;
2403: }
2404: ##
2405: ## Prepare for the big loop.
2406: my $hitcountsum;
2407: my $server;
2408: my $status;
2409: my $revise = &revise_button();
2410: $r->print(<<END);
2411: <table>
2412: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2413: <tr>
2414: <td><input type="text" name="status" value="" size="50" /></td>
2415: <td><input type="text" name="count" value="" size="10" /></td>
2416: <td><input type="text" name="seconds" value="" size="8" /></td>
2417: <td>$revise</td>
2418: </tr>
2419: </table>
2420: </form>
2421: END
2422: $r->rflush();
2423: &reset_timing();
2424: &update_seconds($r);
2425: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2426: while (&time_left() &&
2427: ((@Servers_to_contact) || keys(%Server_status))) {
2428: &update_seconds($r);
2429: #
2430: # Send out a search request
2431: if (@Servers_to_contact) {
2432: # Contact one server
2433: my $server = shift(@Servers_to_contact);
2434: &update_status($r,&mt('contacting [_1]',$server));
2435: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2436: $customshow,[$server]);
2437: ($server) = keys(%$reply);
2438: $Server_status{$server} = $reply->{$server};
2439: } else {
2440: # wait a sec. to give time for files to be written
2441: # This sleep statement is here instead of outside the else
2442: # block because we do not want to pause if we have servers
2443: # left to contact.
2444: if (scalar (keys(%Server_status))) {
2445: &update_status($r,
2446: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2447: }
2448: sleep(1);
2449: }
2450: #
2451: # Loop through the servers we have contacted but do not
2452: # have results from yet, looking for results.
2453: foreach my $server (keys(%Server_status)) {
2454: last if ($connection->aborted());
2455: &update_seconds($r);
2456: my $status = $Server_status{$server};
2457: if ($status eq 'con_lost') {
2458: delete ($Server_status{$server});
2459: next;
2460: }
2461: $status=~s|/||g;
2462: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$status;
2463: if (-e $datafile && ! -e "$datafile.end") {
2464: &update_status($r,&mt('Receiving results from [_1]',$server));
2465: next;
2466: }
2467: last if ($connection->aborted());
2468: if (-e "$datafile.end") {
2469: &update_status($r,&mt('Reading results from [_1]',$server));
2470: if (-z "$datafile") {
2471: delete($Server_status{$server});
2472: next;
2473: }
2474: my $fh;
2475: if (!($fh=Apache::File->new($datafile))) {
2476: $r->print("Unable to open search results file for ".
2477: "server $server. Omitting from search");
2478: delete($Server_status{$server});
2479: next;
2480: }
2481: # Read in the whole file.
2482: while (my $result = <$fh>) {
2483: last if ($connection->aborted());
2484: #
2485: # Records are stored one per line
2486: chomp($result);
2487: next if (! $result);
2488: #
2489: # Parse the result.
2490: my %Fields = &parse_raw_result($result,$server);
2491: $Fields{'hostname'} = $server;
2492: #
2493: # Skip if external and we did not want that
2494: next if ((! $env{'form.inclext'}) && ($Fields{'url'}=~/^\/ext\//));
2495: # Skip based on copyright
2496: next if (! ©right_check(\%Fields));
2497:
2498: #
2499: # Store the result in the mysql database
2500: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2501: if (! defined($result)) {
2502: $r->print(&Apache::lonmysql::get_error());
2503: }
2504: #
2505: $hitcountsum ++;
2506: &update_seconds($r);
2507: if ($hitcountsum % 50 == 0) {
2508: &update_count_status($r,$hitcountsum);
2509: }
2510: }
2511: $fh->close();
2512: # $server is only deleted if the results file has been
2513: # found and (successfully) opened. This may be a bad idea.
2514: delete($Server_status{$server});
2515: }
2516: last if ($connection->aborted());
2517: &update_count_status($r,$hitcountsum);
2518: }
2519: last if ($connection->aborted());
2520: &update_seconds($r);
2521: }
2522: &update_status($r,&mt('Search Complete [_1]',$server));
2523: &update_seconds($r);
2524: #
2525: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2526: #
2527: # We have run out of time or run out of servers to talk to and
2528: # results to get, so let the client know the top frame needs to be
2529: # loaded from /adm/searchcat
2530: $r->print(&Apache::loncommon::end_page());
2531: # if ($env{'form.catalogmode'} ne 'import') {
2532: $r->print("<script>".
2533: "window.location='/adm/searchcat?".
2534: "phase=sort&".
2535: "persistent_db_id=$env{'form.persistent_db_id'}';".
2536: "</script>");
2537: # }
2538: return;
2539: }
2540:
2541: ######################################################################
2542: ######################################################################
2543:
2544: =pod
2545:
2546: =item &prev_next_buttons()
2547:
2548: Returns html for the previous and next buttons on the search results page.
2549:
2550: =cut
2551:
2552: ######################################################################
2553: ######################################################################
2554: sub prev_next_buttons {
2555: my ($current_min,$show,$total,$parms) = @_;
2556: return '' if ($show eq 'all'); # No links if you get them all at once.
2557: #
2558: # Create buttons
2559: my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
2560: $buttons .= '/>';
2561: $buttons .= ' 'x3;
2562: $buttons .= '<input type="submit" name="reload" '.
2563: 'value="'.&mt('Reload').'" />';
2564: $buttons .= ' 'x3;
2565: $buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
2566: $buttons .= '/>';
2567: return $buttons;
2568: }
2569:
2570: ######################################################################
2571: ######################################################################
2572:
2573: =pod
2574:
2575: =item &display_results()
2576:
2577: Prints the results out for selection and perusal.
2578:
2579: =cut
2580:
2581: ######################################################################
2582: ######################################################################
2583: sub display_results {
2584: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2585: my $connection = $r->connection;
2586: $r->print(&search_results_header($importbutton,$closebutton));
2587: ##
2588: ## Set viewing function
2589: ##
2590: my $viewfunction = $Views{$env{'form.viewselect'}};
2591: if (!defined($viewfunction)) {
2592: $r->print("Internal Error - Bad view selected.\n");
2593: $r->rflush();
2594: return;
2595: }
2596: ##
2597: ## $checkbox_num is a count of the number of checkboxes output on the
2598: ## page this is used only during catalogmode=import.
2599: my $checkbox_num = 0;
2600: ##
2601: ## Get the catalog controls setup
2602: ##
2603: my $action = "/adm/searchcat?phase=results";
2604: ##
2605: ## Deal with import by opening the import db file.
2606: if ($env{'form.catalogmode'} eq 'import') {
2607: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2608: &GDBM_WRCREAT(),0640)) {
2609: $r->print('Unable to store import results.</form>'.
2610: &Apache::loncommon::end_page());
2611: $r->rflush();
2612: return;
2613: }
2614: }
2615: ##
2616: ## Prepare the table for querying
2617: my $table = $env{'form.table'};
2618: return if (! &ensure_db_and_table($r,$table));
2619: ##
2620: ## Get the number of results
2621: my $total_results = &Apache::lonmysql::number_of_rows($table);
2622: if (! defined($total_results)) {
2623: $r->print("A MySQL error has occurred.</form>".
2624: &Apache::loncommon::end_page());
2625: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2626: " of rows in table ".$table);
2627: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2628: return;
2629: }
2630: ##
2631: ## Determine how many results we need to get
2632: $env{'form.start'} = 1 if (! exists($env{'form.start'}));
2633: $env{'form.show'} = 20 if (! exists($env{'form.show'}));
2634: if (exists($env{'form.prev'})) {
2635: $env{'form.start'} -= $env{'form.show'};
2636: } elsif (exists($env{'form.next'})) {
2637: $env{'form.start'} += $env{'form.show'};
2638: }
2639: $env{'form.start'} = 1 if ($env{'form.start'}<1);
2640: $env{'form.start'} = $total_results if ($env{'form.start'}>$total_results);
2641: my $min = $env{'form.start'};
2642: my $max;
2643: if ($env{'form.show'} eq 'all') {
2644: $max = $total_results ;
2645: } else {
2646: $max = $min + $env{'form.show'} - 1;
2647: $max = $total_results if ($max > $total_results);
2648: }
2649: ##
2650: ## Output form elements
2651: $r->print(&hidden_field('table').
2652: &hidden_field('phase').
2653: &hidden_field('persistent_db_id').
2654: &hidden_field('start')
2655: );
2656: #
2657: # Build sorting selector
2658: my @fields =
2659: (
2660: {key=>'default' },
2661: {key=>'title' },
2662: {key =>'author' },
2663: {key =>'subject'},
2664: {key =>'url',desc=>'URL'},
2665: {key =>'keywords'},
2666: {key =>'language'},
2667: {key =>'creationdate'},
2668: {key =>'lastrevisiondate'},
2669: {key =>'owner'},
2670: {key =>'copyright'},
2671: {key =>'authorspace'},
2672: {key =>'lowestgradelevel'},
2673: {key =>'highestgradelevel'},
2674: {key =>'standards',desc=>'Standards'},
2675: {key =>'count',desc=>'Number of accesses'},
2676: {key =>'stdno',desc=>'Students Attempting'},
2677: {key =>'avetries',desc=>'Average Number of Tries'},
2678: {key =>'difficulty',desc=>'Mean Degree of Difficulty'},
2679: {key =>'disc',desc=>'Mean Degree of Discrimination'},
2680: {key =>'clear',desc=>'Evaluation: Clear'},
2681: {key =>'technical',desc=>'Evaluation: Technically Correct'},
2682: {key =>'correct',desc=>'Evaluation: Material is Correct'},
2683: {key =>'helpful',desc=>'Evaluation: Material is Helpful'},
2684: {key =>'depth',desc=>'Evaluation: Material has Depth'},
2685: );
2686: my %fieldnames = &Apache::lonmeta::fieldnames();
2687: my @field_order;
2688: foreach my $field_data (@fields) {
2689: push(@field_order,$field_data->{'key'});
2690: if (! exists($field_data->{'desc'})) {
2691: $field_data->{'desc'}=$fieldnames{$field_data->{'key'}};
2692: } else {
2693: if (! defined($field_data->{'desc'})) {
2694: $field_data->{'desc'} = ucfirst($field_data->{'key'});
2695: }
2696: $field_data->{'desc'} = &mt($field_data->{'desc'});
2697: }
2698: }
2699: my %sort_fields = map {$_->{'key'},$_->{'desc'}} @fields;
2700: $sort_fields{'select_form_order'} = \@field_order;
2701: $env{'form.sortorder'} = 'desc' if (! exists($env{'form.sortorder'}));
2702: $env{'form.sortfield'} = 'count' if (! exists($env{'form.sortfield'}));
2703: if (! exists($env{'form.sortorder'})) {
2704: if ($env{'form.sortfield'}=~/^(count|stdno|disc|clear|technical|correct|helpful)$/) {
2705: $env{'form.sortorder'}='desc';
2706: } else {
2707: $env{'form.sortorder'}='asc';
2708: }
2709: }
2710: my $sortform = &mt('Sort by [_1] [_2]',
2711: &Apache::loncommon::select_form($env{'form.sortfield'},
2712: 'sortfield',
2713: %sort_fields),
2714: &Apache::loncommon::select_form($env{'form.sortorder'},
2715: 'sortorder',
2716: (asc =>&mt('Ascending'),
2717: desc=>&mt('Descending')
2718: ))
2719: );
2720: ##
2721: ## Output links (if necessary) for 'prev' and 'next' pages.
2722: $r->print
2723: ('<table width="100%"><tr><td width="25%" align="right">'.
2724: '<nobr>'.$sortform.'</nobr>'.
2725: '</td><td width="25%" align="right">'.
2726: &prev_next_buttons($min,$env{'form.show'},$total_results).
2727: '</td><td align="right">'.
2728: &viewoptions().'</td></tr></table>'
2729: );
2730: if ($total_results == 0) {
2731: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2" />'.
2732: '<h3>'.&mt('There are currently no results').'.</h3>'.
2733: "</form>".
2734: &Apache::loncommon::end_page());
2735: return;
2736: } else {
2737: $r->print('<center>'.
2738: mt('Results [_1] to [_2] out of [_3]',
2739: $min,$max,$total_results).
2740: "</center>\n");
2741: }
2742: ##
2743: ## Get results from MySQL table
2744: my $sort_command = 'id>='.$min.' AND id<='.$max;
2745: my $order;
2746: if (exists($env{'form.sortorder'})) {
2747: if ($env{'form.sortorder'} eq 'asc') {
2748: $order = 'ASC';
2749: } elsif ($env{'form.sortorder'} eq 'desc') {
2750: $order = 'DESC';
2751: } else {
2752: $order = '';
2753: }
2754: } else {
2755: $order = '';
2756: }
2757: if ($env{'form.sortfield'} ne 'default' &&
2758: exists($sort_fields{$env{'form.sortfield'}})) {
2759: $sort_command = $env{'form.sortfield'}.' IS NOT NULL '.
2760: 'ORDER BY '.$env{'form.sortfield'}.' '.$order.
2761: ' LIMIT '.($min-1).','.($max-$min+1);
2762: }
2763: my @Results = &Apache::lonmysql::get_rows($table,$sort_command);
2764: ##
2765: ## Loop through the results and output them.
2766: foreach my $row (@Results) {
2767: if ($connection->aborted()) {
2768: &cleanup();
2769: return;
2770: }
2771: my %Fields = %{&parse_row(@$row)};
2772: my $output="<p>\n";
2773: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2774: $Fields{'title'} = 'Untitled';
2775: }
2776: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2777: $Fields{'id'},$checkbox_num++);
2778: # Render the result into html
2779: $output.= &$viewfunction($prefix,%Fields);
2780: # Print them out as they come in.
2781: $r->print($output);
2782: $r->rflush();
2783: }
2784: if (@Results < 1) {
2785: $r->print(&mt("There were no results matching your query"));
2786: } else {
2787: $r->print
2788: ('<center>'.
2789: &prev_next_buttons($min,$env{'form.show'},$total_results,
2790: "table=".$env{'form.table'}.
2791: "&phase=results".
2792: "&persistent_db_id=".
2793: $env{'form.persistent_db_id'})
2794: ."</center>\n"
2795: );
2796: }
2797: $r->print("</form>".&Apache::loncommon::end_page());
2798: $r->rflush();
2799: untie %groupsearch_db if (tied(%groupsearch_db));
2800: return;
2801: }
2802:
2803: ######################################################################
2804: ######################################################################
2805:
2806: =pod
2807:
2808: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2809:
2810: Returns html needed for the various catalog modes. Gets inputs from
2811: $env{'form.catalogmode'}. Stores data in %groupsearch_db.
2812:
2813: =cut
2814:
2815: ######################################################################
2816: ######################################################################
2817: sub catalogmode_output {
2818: my $output = '';
2819: my ($title,$url,$fnum,$checkbox_num) = @_;
2820: if ($env{'form.catalogmode'} eq 'interactive') {
2821: $title=~ s/\'/\\\'/g;
2822: if ($env{'form.catalogmode'} eq 'interactive') {
2823: $output.=<<END
2824: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2825: onClick="javascript:select_data('$title','$url')">
2826: </font>
2827: END
2828: }
2829: } elsif ($env{'form.catalogmode'} eq 'import') {
2830: $groupsearch_db{"pre_${fnum}_link"}=$url;
2831: $groupsearch_db{"pre_${fnum}_title"}=$title;
2832: $output.=<<END;
2833: <font size='-1'>
2834: <input type="checkbox" name="returnvalues" value="SELECT"
2835: onClick="javascript:queue($checkbox_num,$fnum)" />
2836: </font>
2837: END
2838: }
2839: return $output;
2840: }
2841: ######################################################################
2842: ######################################################################
2843:
2844: =pod
2845:
2846: =item &parse_row()
2847:
2848: Parse a row returned from the database.
2849:
2850: =cut
2851:
2852: ######################################################################
2853: ######################################################################
2854: sub parse_row {
2855: my @Row = @_;
2856: my %Fields;
2857: if (! scalar(@Datatypes)) {
2858: &set_up_table_structure();
2859: }
2860: for (my $i=0;$i<=$#Row;$i++) {
2861: $Fields{$Datatypes[$i]->{'name'}}=&unescape($Row[$i]);
2862: }
2863: $Fields{'language'} =
2864: &Apache::loncommon::languagedescription($Fields{'language'});
2865: $Fields{'copyrighttag'} =
2866: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2867: $Fields{'mimetag'} =
2868: &Apache::loncommon::filedescription($Fields{'mime'});
2869: return \%Fields;
2870: }
2871:
2872: ###########################################################
2873: ###########################################################
2874:
2875: =pod
2876:
2877: =item &parse_raw_result()
2878:
2879: Takes a line from the file of results and parse it. Returns a hash
2880: with keys according to column labels
2881:
2882: In addition, the following tags are set by calling the appropriate
2883: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2884:
2885: The 'title' field is set to "Untitled" if the title field is blank.
2886:
2887: 'abstract' and 'keywords' are truncated to 200 characters.
2888:
2889: =cut
2890:
2891: ###########################################################
2892: ###########################################################
2893: sub parse_raw_result {
2894: my ($result,$hostname) = @_;
2895: # conclude from self to others regarding fields
2896: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2897: (map {
2898: &unescape($_);
2899: } (split(/\,/,$result)) );
2900: return %Fields;
2901: }
2902:
2903: ###########################################################
2904: ###########################################################
2905:
2906: =pod
2907:
2908: =item &handle_custom_fields()
2909:
2910: =cut
2911:
2912: ###########################################################
2913: ###########################################################
2914: sub handle_custom_fields {
2915: my @results = @{shift()};
2916: my $customshow='';
2917: my $extrashow='';
2918: my @customfields;
2919: if ($env{'form.customshow'}) {
2920: $customshow=$env{'form.customshow'};
2921: $customshow=~s/[^\w\s]//g;
2922: my @fields=map {
2923: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2924: } split(/\s+/,$customshow);
2925: @customfields=split(/\s+/,$customshow);
2926: if ($customshow) {
2927: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2928: }
2929: }
2930: my $customdata='';
2931: my %customhash;
2932: foreach my $result (@results) {
2933: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2934: my $tmp=$result;
2935: $tmp=~s/^custom\=//;
2936: my ($k,$v)=map {&unescape($_);
2937: } split(/\,/,$tmp);
2938: $customhash{$k}=$v;
2939: }
2940: }
2941: return ($extrashow,\@customfields,\%customhash);
2942: }
2943:
2944: ######################################################################
2945: ######################################################################
2946:
2947: =pod
2948:
2949: =item &search_results_header()
2950:
2951: Output the proper html headers and javascript code to deal with different
2952: calling modes.
2953:
2954: Takes most inputs directly from %env, except $mode.
2955:
2956: =over 4
2957:
2958: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2959:
2960: =back
2961:
2962: The following environment variables are checked:
2963:
2964: =over 4
2965:
2966: =item 'form.catalogmode'
2967:
2968: Checked for 'interactive' and 'import'.
2969:
2970: =item 'form.mode'
2971:
2972: Checked for existance & 'edit' mode.
2973:
2974: =item 'form.form'
2975:
2976: Contains the name of the form that has the input fields to set
2977:
2978: =item 'form.element'
2979:
2980: the name of the input field to put the URL into
2981:
2982: =item 'form.titleelement'
2983:
2984: the name of the input field to put the title into
2985:
2986: =back
2987:
2988: =cut
2989:
2990: ######################################################################
2991: ######################################################################
2992: sub search_results_header {
2993: my ($importbutton,$closebutton) = @_;
2994:
2995: my $js;
2996: # output beginning of search page
2997: # conditional output of script functions dependent on the mode in
2998: # which the search was invoked
2999: if ($env{'form.catalogmode'} eq 'interactive'){
3000: if (! exists($env{'form.mode'}) || $env{'form.mode'} ne 'edit') {
3001: $js.=<<SCRIPT;
3002: <script type="text/javascript">
3003: function select_data(title,url) {
3004: changeTitle(title);
3005: changeURL(url);
3006: parent.close();
3007: }
3008: function changeTitle(val) {
3009: if (parent.opener.inf.document.forms.resinfo.elements.t) {
3010: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
3011: }
3012: }
3013: function changeURL(val) {
3014: if (parent.opener.inf.document.forms.resinfo.elements.u) {
3015: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
3016: }
3017: }
3018: </script>
3019: SCRIPT
3020: } elsif ($env{'form.mode'} eq 'edit') {
3021: my $form = $env{'form.form'};
3022: my $element = $env{'form.element'};
3023: my $titleelement = $env{'form.titleelement'};
3024: my $changetitle;
3025: if (!$titleelement) {
3026: $changetitle='function changeTitle(val) {}';
3027: } else {
3028: $changetitle=<<END;
3029: function changeTitle(val) {
3030: if (parent.targetwin.document) {
3031: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
3032: } else {
3033: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
3034: alert("Unable to transfer data to "+url);
3035: }
3036: }
3037: END
3038: }
3039:
3040: $js.=<<SCRIPT;
3041: <script type="text/javascript">
3042: function select_data(title,url) {
3043: changeURL(url);
3044: changeTitle(title);
3045: parent.close();
3046: }
3047: $changetitle
3048: function changeURL(val) {
3049: if (parent.targetwin.document) {
3050: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
3051: } else {
3052: var url = 'forms[\"$form\"].elements[\"$element\"].value';
3053: alert("Unable to transfer data to "+url);
3054: }
3055: }
3056: </script>
3057: SCRIPT
3058: }
3059: }
3060: $js.=<<SCRIPT if $env{'form.catalogmode'} eq 'import';
3061: <script type="text/javascript">
3062: function queue(checkbox_num,val) {
3063: if (document.forms.results.returnvalues.length != "undefined" &&
3064: typeof(document.forms.results.returnvalues.length) == "number") {
3065: if (document.forms.results.returnvalues[checkbox_num].checked) {
3066: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
3067: } else {
3068: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
3069: }
3070: } else {
3071: if (document.forms.results.returnvalues.checked) {
3072: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
3073: } else {
3074: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
3075: }
3076: }
3077: }
3078: function select_group() {
3079: parent.window.location=
3080: "/adm/groupsort?mode=$env{'form.mode'}&catalogmode=import&acts="+
3081: parent.statusframe.document.forms.statusform.elements.Queue.value;
3082: }
3083: </script>
3084: SCRIPT
3085:
3086: my $start_page = &Apache::loncommon::start_page(undef,$js,
3087: {'only_body' =>1});
3088: my $result=<<END;
3089: $start_page
3090: <form name="results" method="post" action="/adm/searchcat">
3091: $importbutton
3092: END
3093: return $result;
3094: }
3095:
3096: ######################################################################
3097: ######################################################################
3098: sub search_status_header {
3099: my $start_page = &Apache::loncommon::start_page('Search Status',undef,
3100: {'only_body' => 1});
3101: return <<ENDSTATUS;
3102: $start_page
3103: <h3>Search Status</h3>
3104: Sending search request to LON-CAPA servers.<br />
3105: ENDSTATUS
3106: }
3107:
3108: sub results_link {
3109: my $basic_link = "/adm/searchcat?"."&table=".$env{'form.table'}.
3110: "&persistent_db_id=".$env{'form.persistent_db_id'};
3111: my $results_link = $basic_link."&phase=results".
3112: "&pause=1"."&start=1";
3113: return $results_link;
3114: }
3115:
3116: ######################################################################
3117: ######################################################################
3118: sub print_frames_interface {
3119: my $r = shift;
3120: my $basic_link = "/adm/searchcat?"."&table=".$env{'form.table'}.
3121: "&persistent_db_id=".$env{'form.persistent_db_id'};
3122: my $run_search_link = $basic_link."&phase=run_search";
3123: my $results_link = &results_link();
3124: my $js = <<JS;
3125: <script type="text/javascript">
3126: var targetwin = opener;
3127: var queue = '';
3128: </script>
3129: JS
3130:
3131: my $start_page =
3132: &Apache::loncommon::start_page('LON-CAPA Digital Library Search Results',
3133: $js,
3134: {'frameset' => 1,
3135: 'add_entries' => {
3136: 'rows' => "150,*",},});
3137: my $end_page =
3138: &Apache::loncommon::end_page({'frameset' => 1});
3139:
3140: my $result = <<"ENDFRAMES";
3141: $start_page
3142: <frame name="statusframe" src="$run_search_link">
3143: <frame name="resultsframe" src="$results_link">
3144: $end_page
3145: ENDFRAMES
3146:
3147: $r->print($result);
3148: return;
3149: }
3150:
3151: ######################################################################
3152: ######################################################################
3153:
3154: sub has_stat_data {
3155: my ($values) = @_;
3156: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
3157: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
3158: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
3159: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
3160: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
3161: return 1;
3162: }
3163: return 0;
3164: }
3165:
3166: sub statfields {
3167: return ('count','stdno','disc','avetries','difficulty');
3168: }
3169:
3170: sub has_eval_data {
3171: my ($values) = @_;
3172: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
3173: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
3174: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
3175: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
3176: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
3177: return 1;
3178: }
3179: return 0;
3180: }
3181:
3182: sub evalfields {
3183: return ('clear','technical','correct','helpful','depth');
3184: }
3185:
3186: ######################################################################
3187: ######################################################################
3188:
3189: =pod
3190:
3191: =item Metadata Viewing Functions
3192:
3193: Output is a HTML-ified string.
3194:
3195: Input arguments are title, author, subject, url, keywords, version,
3196: notes, short abstract, mime, language, creation date,
3197: last revision date, owner, copyright, hostname, and
3198: extra custom metadata to show.
3199:
3200: =over 4
3201:
3202: =item &detailed_citation_view()
3203:
3204: =cut
3205:
3206: ######################################################################
3207: ######################################################################
3208: sub detailed_citation_view {
3209: my ($prefix,%values) = @_;
3210: my $result;
3211: my $jumpurl=$values{'url'};
3212: $jumpurl=~s/^\/ext\//http\:\/\//;
3213: $result .= '<b>'.$prefix.
3214: '<img src="'.&Apache::loncommon::icon($values{'url'}).'" />'.' '.
3215: '<a href="'.$jumpurl.'" '.
3216: 'target="search_preview">'.$values{'title'}."</a></b>\n";
3217: $result .= "<p>\n";
3218: $result .= '<b>'.$values{'author'}.'</b>,'.
3219: ' <i>'.$values{'owner'}.'</i><br />';
3220: foreach my $field
3221: (
3222: { name=>'url',
3223: translate => '<b>URL:</b> [_1]',
3224: special => 'url link',},
3225: { name=>'subject',
3226: translate => '<b>Subject:</b> [_1]',},
3227: { name=>'keywords',
3228: translate => '<b>Keywords:</b> [_1]',},
3229: { name=>'notes',
3230: translate => '<b>Notes:</b> [_1]',},
3231: { name=>'mimetag',
3232: translate => '<b>MIME Type:</b> [_1]',},
3233: { name=>'standards',
3234: translate => '<b>Standards:</b>[_1]',},
3235: { name=>'copyrighttag',
3236: translate => '<b>Copyright/Distribution:</b> [_1]',},
3237: { name=>'count',
3238: format => "%d",
3239: translate => '<b>Access Count:</b> [_1]',},
3240: { name=>'stdno',
3241: format => "%d",
3242: translate => '<b>Number of Students:</b> [_1]',},
3243: { name=>'avetries',
3244: format => "%.2f",
3245: translate => '<b>Average Tries:</b> [_1]',},
3246: { name=>'disc',
3247: format => "%.2f",
3248: translate => '<b>Degree of Discrimination:</b> [_1]',},
3249: { name=>'difficulty',
3250: format => "%.2f",
3251: translate => '<b>Degree of Difficulty:</b> [_1]',},
3252: { name=>'clear',
3253: format => "%.2f",
3254: translate => '<b>Clear:</b> [_1]',},
3255: { name=>'depth',
3256: format => "%.2f",
3257: translate => '<b>Depth:</b> [_1]',},
3258: { name=>'helpful',
3259: format => "%.2f",
3260: translate => '<b>Helpful:</b> [_1]',},
3261: { name=>'correct',
3262: format => "%.2f",
3263: translate => '<b>Correct:</b> [_1]',},
3264: { name=>'technical',
3265: format => "%.2f",
3266: translate => '<b>Technical:</b> [_1]',},
3267: { name=>'comefrom_list',
3268: type => 'list',
3269: translate => 'Resources that lead up to this resource in maps',},
3270: { name=>'goto_list',
3271: type => 'list',
3272: translate => 'Resources that follow this resource in maps',},
3273: { name=>'sequsage_list',
3274: type => 'list',
3275: translate => 'Resources using or importing resource',},
3276: ) {
3277: next if (! exists($values{$field->{'name'}}) ||
3278: $values{$field->{'name'}} eq '');
3279: if (exists($field->{'type'}) && $field->{'type'} eq 'list') {
3280: $result .= '<b>'.&mt($field->{'translate'}).'</b>';
3281: foreach my $item (split(',',$values{$field->{'name'}})){
3282: $result .=
3283: &Apache::lonhtmlcommon::crumbs($item,
3284: (($env{'form.catalogmode'} eq 'import')?'_top':'preview'),
3285: '/res',
3286: (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1);
3287: }
3288: } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){
3289: $result.= &mt($field->{'translate'},
3290: sprintf($field->{'format'},
3291: $values{$field->{'name'}}))."<br />\n";
3292: } else {
3293: if ($field->{'special'} eq 'url link') {
3294: $result.=
3295: &Apache::lonhtmlcommon::crumbs($jumpurl,
3296: (($env{'form.catalogmode'} eq 'import')?'_top':'preview'),
3297: '',
3298: (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1);
3299: } else {
3300: $result.= &mt($field->{'translate'},
3301: $values{$field->{'name'}});
3302: }
3303: $result .= "<br />\n";
3304: }
3305: }
3306: $result .= "</p>";
3307: if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
3308: $result .= '<p>'.$values{'extrashow'}.'</p>';
3309: }
3310: if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
3311: $result .= '<p>'.$values{'shortabstract'}.'</p>';
3312: }
3313: $result .= '<hr align="left" width="200" noshade />'."\n";
3314: return $result;
3315: }
3316:
3317: sub detailed_citation_preview {
3318: my ($prefix,%values)=@_;
3319: return '<table><tr><td>'.
3320: &detailed_citation_view($prefix,%values).
3321: '</td><td>'.
3322: &Apache::lonindexer::showpreview($values{'url'}).
3323: '</td></tr></table><hr />';
3324: }
3325:
3326:
3327: ######################################################################
3328: ######################################################################
3329:
3330: =pod
3331:
3332: =item &summary_view()
3333:
3334: =cut
3335: ######################################################################
3336: ######################################################################
3337: sub summary_view {
3338: my ($prefix,%values) = @_;
3339: my $icon=&Apache::loncommon::icon($values{'url'});
3340: my $result=qq{$prefix<img src="$icon" />};
3341: if (exists($env{'form.sortfield'}) &&
3342: $env{'form.sortfield'} !~ /^(default|
3343: author|
3344: url|
3345: title|
3346: owner|
3347: lastrevisiondate|
3348: copyright)$/x) {
3349: my $tmp = $values{$env{'form.sortfield'}};
3350: if (! defined($tmp)) { $tmp = 'undefined'; }
3351: $result .= ' '.$tmp.' ';
3352: }
3353: my $jumpurl=$values{'url'};
3354: $jumpurl=~s/^\/ext\//http\:\/\//;
3355: my $link=&Apache::lonhtmlcommon::crumbs($jumpurl,
3356: (($env{'form.catalogmode'} eq 'import')?'_top':'preview'),
3357: '',
3358: (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1);
3359:
3360: $result.=<<END;
3361: <a href="$jumpurl"
3362: target='search_preview'>$values{'title'}</a>$link
3363: $values{'author'}, $values{'owner'} -- $values{'lastrevisiondate'}<br />
3364: $values{'copyrighttag'}<br />
3365: $values{'extrashow'}
3366: </p>
3367: <hr align='left' width='200' noshade />
3368: END
3369: return $result;
3370: }
3371:
3372: sub summary_preview {
3373: my ($prefix,%values)=@_;
3374: return '<table><tr><td>'.
3375: &summary_view($prefix,%values).
3376: '</td><td>'.
3377: &Apache::lonindexer::showpreview($values{'url'}).
3378: '</td></tr></table><hr />';
3379: }
3380:
3381: ######################################################################
3382: ######################################################################
3383:
3384: =pod
3385:
3386: =item &compact_view()
3387:
3388: =cut
3389:
3390: ######################################################################
3391: ######################################################################
3392: sub compact_view {
3393: my ($prefix,%values) = @_;
3394: my $jumpurl=$values{'url'};
3395: $jumpurl=~s/^\/ext\//http\:\/\//;
3396: my $link=&Apache::lonhtmlcommon::crumbs($jumpurl,
3397: (($env{'form.catalogmode'} eq 'import')?'_top':'preview'),
3398: '',
3399: (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1);
3400: my $result =
3401: $prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).'">';
3402: if (exists($env{'form.sortfield'}) &&
3403: $env{'form.sortfield'} !~ /^(default|author|url|title)$/) {
3404: my $tmp = $values{$env{'form.sortfield'}};
3405: if (! defined($tmp)) { $tmp = 'undefined'; }
3406: $result .= ' '.$tmp.' ';
3407: }
3408: $result.=' <a href="'.$jumpurl.'" target="search_preview">'.
3409: $values{'title'}.'</a>'.(' 'x2).$link.
3410: '<b>'.$values{'author'}.'</b> ('.$values{'domain'}.')<br />';
3411: return $result;
3412: }
3413:
3414:
3415: ######################################################################
3416: ######################################################################
3417:
3418: =pod
3419:
3420: =item &fielded_format_view()
3421:
3422: =cut
3423:
3424: ######################################################################
3425: ######################################################################
3426: sub fielded_format_view {
3427: my ($prefix,%values) = @_;
3428: my $icon=&Apache::loncommon::icon($values{'url'});
3429: my %Translated = &Apache::lonmeta::fieldnames();
3430: my $jumpurl=$values{'url'};
3431: $jumpurl=~s/^\/ext\//http\:\/\//;
3432:
3433: my $result=<<END;
3434: $prefix <img src="$icon" />
3435: <dl>
3436: <dt>URL:</dt>
3437: <dd><a href="$jumpurl"
3438: target='search_preview'>$values{'url'}</a></dd>
3439: END
3440: foreach my $field ('title','author','domain','subject','keywords','notes',
3441: 'mimetag','language','creationdate','lastrevisiondate',
3442: 'owner','copyrighttag','hostname','abstract') {
3443: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3444: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3445: }
3446: if (&has_stat_data(\%values)) {
3447: foreach my $field (&statfields()) {
3448: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3449: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3450: }
3451: }
3452: if (&has_eval_data(\%values)) {
3453: foreach my $field (&evalfields()) {
3454: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3455: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3456: }
3457: }
3458: $result .= "</dl>\n";
3459: $result .= $values{'extrashow'};
3460: $result .= '<hr align="left" width="200" noshade />'."\n";
3461: return $result;
3462: }
3463:
3464: ######################################################################
3465: ######################################################################
3466:
3467: =pod
3468:
3469: =item &xml_sgml_view()
3470:
3471: =back
3472:
3473: =cut
3474:
3475: ######################################################################
3476: ######################################################################
3477: sub xml_sgml_view {
3478: my ($prefix,%values) = @_;
3479: my $xml = '<LonCapaResource>'."\n";
3480: # The usual suspects
3481: foreach my $field ('url','title','author','subject','keywords','notes','domain') {
3482: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3483: }
3484: #
3485: $xml .= "<mimeInfo>\n";
3486: foreach my $field ('mime','mimetag') {
3487: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3488: }
3489: $xml .= "</mimeInfo>\n";
3490: #
3491: $xml .= "<languageInfo>\n";
3492: foreach my $field ('language','languagetag') {
3493: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3494: }
3495: $xml .= "</languageInfo>\n";
3496: #
3497: foreach my $field ('creationdate','lastrevisiondate','owner') {
3498: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3499: }
3500: #
3501: $xml .= "<copyrightInfo>\n";
3502: foreach my $field ('copyright','copyrighttag') {
3503: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3504: }
3505: $xml .= "</copyrightInfo>\n";
3506: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3507: "\n";
3508: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3509: #
3510: if (&has_stat_data(\%values)){
3511: $xml .= "<problemstatistics>\n";
3512: foreach my $field (&statfields()) {
3513: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3514: }
3515: $xml .= "</problemstatistics>\n";
3516: }
3517: #
3518: if (&has_eval_data(\%values)) {
3519: $xml .= "<evaluation>\n";
3520: foreach my $field (&evalfields) {
3521: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3522: }
3523: $xml .= "</evaluation>\n";
3524: }
3525: #
3526: $xml .= "</LonCapaResource>\n";
3527: $xml = &HTML::Entities::encode($xml,'<>&');
3528: my $result=<<END;
3529: $prefix
3530: <pre>
3531: $xml
3532: </pre>
3533: $values{'extrashow'}
3534: <hr align='left' width='200' noshade />
3535: END
3536: return $result;
3537: }
3538:
3539: ######################################################################
3540: ######################################################################
3541:
3542: =pod
3543:
3544: =item &filled() see if field is filled.
3545:
3546: =cut
3547:
3548: ######################################################################
3549: ######################################################################
3550: sub filled {
3551: my ($field)=@_;
3552: if ($field=~/\S/ && $field ne 'any') {
3553: return 1;
3554: } else {
3555: return 0;
3556: }
3557: }
3558:
3559: ######################################################################
3560: ######################################################################
3561:
3562: =pod
3563:
3564: =item &output_unparsed_phrase_error()
3565:
3566: =cut
3567:
3568: ######################################################################
3569: ######################################################################
3570: sub output_unparsed_phrase_error {
3571: my ($r,$closebutton,$parms,$hidden_fields,$field)=@_;
3572: my $errorstring;
3573: if ($field eq 'basicexp') {
3574: $errorstring = &mt('Unable to understand the search phrase <i>[_1]</i>. Please modify your search.',$env{'form.basicexp'});
3575: } else {
3576: $errorstring = &mt('Unable to understand the search phrase <b>[_1]</b>:<i>[_2]</i>.',$field,$env{'form.'.$field});
3577: }
3578: my $heading = &mt('Unparsed Field');
3579: my $revise = &mt('Revise search request');
3580: # make query information persistent to allow for subsequent revision
3581: my $start_page = &Apache::loncommon::start_page('Search');
3582: my $end_page = &Apache::loncommon::end_page();
3583: $r->print(<<ENDPAGE);
3584: $start_page
3585: <form method="post" action="/adm/searchcat">
3586: $hidden_fields
3587: $closebutton
3588: <hr />
3589: <h2>$heading</h2>
3590: <p>
3591: $errorstring
3592: </p>
3593: <p>
3594: <a href="/adm/searchcat?$parms&persistent_db_id=$env{'form.persistent_db_id'}">$revise</a>
3595: </p>
3596: $end_page
3597: ENDPAGE
3598: }
3599:
3600: ######################################################################
3601: ######################################################################
3602:
3603: =pod
3604:
3605: =item &output_blank_field_error()
3606:
3607: Output a complete page that indicates the user has not filled in enough
3608: information to do a search.
3609:
3610: Inputs: $r (Apache request handle), $closebutton, $parms.
3611:
3612: Returns: nothing
3613:
3614: $parms is extra information to include in the 'Revise search request' link.
3615:
3616: =cut
3617:
3618: ######################################################################
3619: ######################################################################
3620: sub output_blank_field_error {
3621: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3622: 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.');
3623: my $revise = &mt('Revise Search Request');
3624: my $heading = &mt('Unactionable Search Queary');
3625: my $start_page = &Apache::loncommon::start_page('Search');
3626: my $end_page = &Apache::loncommon::end_page();
3627: $r->print(<<ENDPAGE);
3628: $start_page
3629: <form method="post" action="/adm/searchcat">
3630: $hidden_fields
3631: $closebutton
3632: <hr />
3633: <h2>$heading</h2>
3634: <p>
3635: $errormsg
3636: </p>
3637: <p>
3638: <a href="/adm/searchcat?$parms&persistent_db_id=$env{'form.persistent_db_id'}">$revise</a>
3639: </p>
3640: $end_page
3641: ENDPAGE
3642: return;
3643: }
3644:
3645: ######################################################################
3646: ######################################################################
3647:
3648: =pod
3649:
3650: =item &output_date_error()
3651:
3652: Output a full html page with an error message.
3653:
3654: Inputs:
3655:
3656: $r, the request pointer.
3657: $message, the error message for the user.
3658: $closebutton, the specialized close button needed for groupsearch.
3659:
3660: =cut
3661:
3662: ######################################################################
3663: ######################################################################
3664: sub output_date_error {
3665: my ($r,$message,$closebutton,$hidden_fields)=@_;
3666: # make query information persistent to allow for subsequent revision
3667: my $start_page = &Apache::loncommon::start_page('Search');
3668: my $end_page = &Apache::loncommon::end_page();
3669: $r->print(<<RESULTS);
3670: $start_page
3671: <form method="post" action="/adm/searchcat">
3672: $hidden_fields
3673: <input type='button' value='Revise search request'
3674: onClick='this.form.submit();' />
3675: $closebutton
3676: <hr />
3677: <h3>Error</h3>
3678: <p>
3679: $message
3680: </p>
3681: $end_page
3682: RESULTS
3683: }
3684:
3685: ######################################################################
3686: ######################################################################
3687:
3688: =pod
3689:
3690: =item &start_fresh_session()
3691:
3692: Cleans the global %groupsearch_db by removing all fields which begin with
3693: 'pre_' or 'store'.
3694:
3695: =cut
3696:
3697: ######################################################################
3698: ######################################################################
3699: sub start_fresh_session {
3700: delete $groupsearch_db{'mode_catalog'};
3701: foreach (keys %groupsearch_db) {
3702: if ($_ =~ /^pre_/) {
3703: delete $groupsearch_db{$_};
3704: }
3705: if ($_ =~ /^store/) {
3706: delete $groupsearch_db{$_};
3707: }
3708: }
3709: }
3710:
3711: 1;
3712:
3713: sub cleanup {
3714: if (tied(%groupsearch_db)) {
3715: unless (untie(%groupsearch_db)) {
3716: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3717: }
3718: }
3719: &untiehash();
3720: &Apache::lonmysql::disconnect_from_db();
3721: return OK;
3722: }
3723:
3724: __END__
3725:
3726: =pod
3727:
3728: =back
3729:
3730: =cut
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