1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.222 2004/05/05 14:14:10 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a separate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: package Apache::lonsearchcat;
63:
64: use strict;
65: use Apache::Constants qw(:common :http);
66: use Apache::lonnet();
67: use Apache::File();
68: use CGI qw(:standard);
69: use Text::Query;
70: use GDBM_File;
71: use Apache::loncommon();
72: use Apache::lonmysql();
73: use Apache::lonmeta;
74: use Apache::lonhtmlcommon;
75: use Apache::lonlocal;
76: use LONCAPA::lonmetadata();
77: use HTML::Entities();
78:
79: ######################################################################
80: ######################################################################
81: ##
82: ## Global variables
83: ##
84: ######################################################################
85: ######################################################################
86: my %groupsearch_db; # Database hash used to save values for the
87: # groupsearch RAT interface.
88: my %persistent_db; # gdbm hash which holds data which is supposed to
89: # persist across calls to lonsearchcat.pm
90:
91: # The different view modes and associated functions
92:
93: my %Views = ("detailed" => \&detailed_citation_view,
94: "summary" => \&summary_view,
95: "fielded" => \&fielded_format_view,
96: "xml" => \&xml_sgml_view,
97: "compact" => \&compact_view);
98:
99: ######################################################################
100: ######################################################################
101: sub handler {
102: my $r = shift;
103: # &set_defaults();
104: #
105: # set form defaults
106: #
107: my $hidden_fields;# Hold all the hidden fields used to keep track
108: # of the search system state
109: my $importbutton; # button to take the selected results and go to group
110: # sorting
111: my $diropendb; # The full path to the (temporary) search database file.
112: # This is set and used in &handler() and is also used in
113: # &output_results().
114: my $bodytag; # LON-CAPA standard body tag, gotten from
115: # &Apache::lonnet::bodytag.
116: # No title, no table, just a <body> tag.
117:
118: my $loaderror=&Apache::lonnet::overloaderror($r);
119: if ($loaderror) { return $loaderror; }
120: #
121: my $closebutton; # button that closes the search window
122: # This button is different for the RAT compared to
123: # normal invocation.
124: #
125: &Apache::loncommon::content_type($r,'text/html');
126: $r->send_http_header;
127: return OK if $r->header_only;
128: ##
129: ## Prevent caching of the search interface window. Hopefully this means
130: ## we will get the launch=1 passed in a little more.
131: &Apache::loncommon::no_cache($r);
132: ##
133: ## Pick up form fields passed in the links.
134: ##
135: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
136: ['catalogmode','launch','acts','mode','form','element','pause',
137: 'phase','persistent_db_id','table','start','show',
138: 'cleargroupsort','titleelement']);
139: ##
140: ## The following is a trick - we wait a few seconds if asked to so
141: ## the daemon running the search can get ahead of the daemon
142: ## printing the results. We only need (theoretically) to do
143: ## this once, so the pause indicator is deleted
144: ##
145: if (exists($ENV{'form.pause'})) {
146: sleep(1);
147: delete($ENV{'form.pause'});
148: }
149: ##
150: ## Initialize global variables
151: ##
152: my $domain = $r->dir_config('lonDefDomain');
153: $diropendb= "/home/httpd/perl/tmp/".
154: "$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
155: #
156: # set the name of the persistent database
157: # $ENV{'form.persistent_db_id'} can only have digits in it.
158: if (! exists($ENV{'form.persistent_db_id'}) ||
159: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
160: ($ENV{'form.launch'} eq '1')) {
161: $ENV{'form.persistent_db_id'} = time;
162: }
163: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
164: my $persistent_db_file = "/home/httpd/perl/tmp/".
165: &Apache::lonnet::escape($domain).
166: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
167: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
168: ##
169: &Apache::lonhtmlcommon::clear_breadcrumbs();
170: if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
171: &Apache::lonhtmlcommon::add_breadcrumb
172: ({href=>'/adm/searchcat?'.
173: 'catalogmode='.$ENV{'form.catalogmode'}.
174: '&launch='.$ENV{'form.launch'}.
175: '&mode='.$ENV{'form.mode'},
176: text=>"Course and Catalog Search",
177: bug=>'Searching',});
178: } else {
179: &Apache::lonhtmlcommon::add_breadcrumb
180: ({href=>'/adm/searchcat?'.
181: 'catalogmode='.$ENV{'form.catalogmode'}.
182: '&launch='.$ENV{'form.launch'}.
183: '&mode='.$ENV{'form.mode'},
184: text=>"Catalog Search",
185: bug=>'Searching',});
186: }
187: #
188: if ($ENV{'form.phase'} !~ m/(basic|adv|course)_search/) {
189: if (! &get_persistent_form_data($persistent_db_file)) {
190: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
191: &Apache::lonnet::logthis('lonsearchcat:'.
192: 'Unable to recover data from '.
193: $persistent_db_file);
194: $r->print(<<END);
195: <html>
196: <head><title>LON-CAPA Search Error</title></head>
197: $bodytag
198: We were unable to retrieve data describing your search. This is a serious
199: error and has been logged. Please alert your LON-CAPA administrator.
200: </body>
201: </html>
202: END
203: return OK;
204: }
205: }
206: } else {
207: &clean_up_environment();
208: }
209: ##
210: ## Clear out old values from groupsearch database
211: ##
212: untie %groupsearch_db if (tied(%groupsearch_db));
213: if (($ENV{'form.cleargroupsort'} eq '1') ||
214: (($ENV{'form.launch'} eq '1') &&
215: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
216: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
217: &start_fresh_session();
218: untie %groupsearch_db;
219: delete($ENV{'form.cleargroupsort'});
220: } else {
221: # This is a stupid error to give to the user.
222: # It really tells them nothing.
223: $r->print('<html><head></head>'.$bodytag.
224: 'Unable to tie hash to db file</body></html>');
225: return OK;
226: }
227: }
228: ##
229: ## Configure hidden fields
230: ##
231: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
232: $ENV{'form.persistent_db_id'}.'" />'."\n";
233: if (exists($ENV{'form.catalogmode'})) {
234: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
235: $ENV{'form.catalogmode'}.'" />'."\n";
236: }
237: if (exists($ENV{'form.form'})) {
238: $hidden_fields .= '<input type="hidden" name="form" value="'.
239: $ENV{'form.form'}.'" />'."\n";
240: }
241: if (exists($ENV{'form.element'})) {
242: $hidden_fields .= '<input type="hidden" name="element" value="'.
243: $ENV{'form.element'}.'" />'."\n";
244: }
245: if (exists($ENV{'form.titleelement'})) {
246: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
247: $ENV{'form.titleelement'}.'" />'."\n";
248: }
249: if (exists($ENV{'form.mode'})) {
250: $hidden_fields .= '<input type="hidden" name="mode" value="'.
251: $ENV{'form.mode'}.'" />'."\n";
252: }
253: ##
254: ## Configure dynamic components of interface
255: ##
256: if ($ENV{'form.catalogmode'} eq 'interactive') {
257: $closebutton="<input type='button' name='close' value='CLOSE' ";
258: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
259: $closebutton .="onClick='parent.close()'";
260: } else {
261: $closebutton .="onClick='self.close()'";
262: }
263: $closebutton .=">\n";
264: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
265: $closebutton="<input type='button' name='close' value='CLOSE' ";
266: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
267: $closebutton .="onClick='parent.close()'";
268: } else {
269: $closebutton .="onClick='self.close()'";
270: }
271: $closebutton .= ">";
272: $importbutton=<<END;
273: <input type='button' name='import' value='IMPORT'
274: onClick='javascript:select_group()'>
275: END
276: } else {
277: $closebutton = '';
278: $importbutton = '';
279: }
280: ##
281: ## Sanity checks on form elements
282: ##
283: if (!defined($ENV{'form.viewselect'})) {
284: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
285: ($ENV{'form.catalogmode'} eq 'interactive')) {
286: $ENV{'form.viewselect'} ="Compact View";
287: } else {
288: $ENV{'form.viewselect'} ="Detailed Citation View";
289: }
290: }
291: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
292: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
293: #
294: $ENV{'form.searchmode'} = 'basic' if (! exists($ENV{'form.searchmode'}));
295: if ($ENV{'form.phase'} eq 'adv_search' ||
296: $ENV{'form.phase'} eq 'disp_adv') {
297: $ENV{'form.searchmode'} = 'advanced';
298: } elsif ($ENV{'form.phase'} eq 'course_search') {
299: $ENV{'form.searchmode'} = 'course_search';
300: }
301: #
302: if ($ENV{'form.searchmode'} eq 'advanced') {
303: &Apache::lonhtmlcommon::add_breadcrumb
304: ({href=>'/adm/searchcat?phase=disp_adv&'.
305: 'catalogmode='.$ENV{'form.catalogmode'}.
306: '&launch='.$ENV{'form.launch'}.
307: '&mode='.$ENV{'form.mode'},
308: text=>"Advanced Search",
309: bug=>'Searching',});
310: } elsif ($ENV{'form.searchmode'} eq 'course search') {
311: &Apache::lonhtmlcommon::add_breadcrumb
312: ({href=>'/adm/searchcat?phase=disp_adv&'.
313: 'catalogmode='.$ENV{'form.catalogmode'}.
314: '&launch='.$ENV{'form.launch'}.
315: '&mode='.$ENV{'form.mode'},
316: text=>"Course Search",
317: bug=>'Searching',});
318: }
319: ##
320: ## Switch on the phase
321: ##
322: if ($ENV{'form.phase'} eq 'disp_basic') {
323: &print_basic_search_form($r,$closebutton,$hidden_fields);
324: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
325: &print_advanced_search_form($r,$closebutton,$hidden_fields);
326: } elsif ($ENV{'form.phase'} eq 'results') {
327: &display_results($r,$importbutton,$closebutton,$diropendb);
328: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
329: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
330: &get_persistent_data($persistent_db_file,
331: ['query','customquery','customshow',
332: 'libraries','pretty_string']);
333: if ($ENV{'form.phase'} eq 'sort') {
334: &print_sort_form($r,$pretty_string);
335: } elsif ($ENV{'form.phase'} eq 'run_search') {
336: &run_search($r,$query,$customquery,$customshow,
337: $libraries,$pretty_string);
338: }
339: } elsif ($ENV{'form.phase'} eq 'course_search') {
340: &course_search($r);
341: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
342: ($ENV{'form.phase'} eq 'adv_search')) {
343: # Set up table
344: if (! defined(&create_results_table())) {
345: my $errorstring=&Apache::lonmysql::get_error();
346: &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
347: 'needed table. lonmysql error:'.
348: $errorstring);
349: $r->print(<<END);
350: <html><head><title>Search Error</title></head>
351: $bodytag
352: Unable to create table in which to store search results.
353: The search has been aborted.
354: </body>
355: </html>
356: END
357: return OK;
358: }
359: delete($ENV{'form.launch'});
360: if (! &make_form_data_persistent($r,$persistent_db_file)) {
361: $r->print(<<END);
362: <html><head><title>Search Error</title></head>
363: $bodytag
364: Unable to properly store search information. The search has been aborted.
365: </body>
366: </html>
367: END
368: return OK;
369: }
370: #
371: # We are running a search
372: my ($query,$customquery,$customshow,$libraries) =
373: (undef,undef,undef,undef);
374: my $pretty_string;
375: if ($ENV{'form.phase'} eq 'basic_search') {
376: ($query,$pretty_string,$libraries) =
377: &parse_basic_search($r,$closebutton,$hidden_fields);
378: } else { # Advanced search
379: ($query,$customquery,$customshow,$libraries,$pretty_string)
380: = &parse_advanced_search($r,$closebutton,$hidden_fields);
381: return OK if (! defined($query));
382: }
383: &make_persistent({ query => $query,
384: customquery => $customquery,
385: customshow => $customshow,
386: libraries => $libraries,
387: pretty_string => $pretty_string },
388: $persistent_db_file);
389: ##
390: ## Print out the frames interface
391: ##
392: &print_frames_interface($r);
393: }
394: return OK;
395: }
396:
397: #
398: # The mechanism used to store values away and retrieve them does not
399: # handle the case of missing environment variables being significant.
400: #
401: # This routine sets non existant checkbox form elements to ''.
402: #
403: sub clean_up_environment {
404: if ($ENV{'form.phase'} eq 'basic_search') {
405: if (! exists($ENV{'form.related'})) {
406: $ENV{'form.related'} = '';
407: }
408: if (! exists($ENV{'form.domains'})) {
409: $ENV{'form.domains'} = '';
410: }
411: } elsif ($ENV{'form.phase'} eq 'adv_search') {
412: foreach my $field ('title','keywords','notes',
413: 'abstract','standards','mime') {
414: if (! exists($ENV{'form.'.$field.'_related'})) {
415: $ENV{'form.'.$field.'_related'} = '';
416: }
417: }
418: } elsif ($ENV{'form.phase'} eq 'course_search') {
419: if (! exists($ENV{'form.crsrelated'})) {
420: $ENV{'form.crsrelated'} = '';
421: }
422: }
423: }
424:
425: ######################################################################
426: ######################################################################
427: ##
428: ## Course Search
429: ##
430: ######################################################################
431: ######################################################################
432: { # Scope the course search to avoid global variables
433: #
434: # Variables For course search
435: my %alreadyseen;
436: my %hash;
437: my $totalfound;
438:
439: sub course_search {
440: my $r=shift;
441: my $bodytag=&Apache::loncommon::bodytag('Course Search');
442: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
443: my $search_string = $ENV{'form.courseexp'};
444: my @New_Words;
445: if ($ENV{'form.crsrelated'}) {
446: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
447: if (@New_Words) {
448: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
449: } else {
450: $pretty_search_string .= ' '.&mt('with no related words').".";
451: }
452: }
453: my $fulltext=$ENV{'form.crsfulltext'};
454: my @allwords=($search_string,@New_Words);
455: $totalfound=0;
456: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
457: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
458: $r->rflush();
459: # ======================================================= Go through the course
460: undef %alreadyseen;
461: %alreadyseen=();
462: my $c=$r->connection;
463: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
464: &GDBM_READER(),0640)) {
465: foreach (keys %hash) {
466: if ($c->aborted()) { last; }
467: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
468: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
469: @allwords);
470: }
471: }
472: untie(%hash);
473: }
474: unless ($totalfound) {
475: $r->print('<p>'.&mt('No resources found').'.</p>');
476: }
477: # =================================================== Done going through course
478: $r->print('</body></html>');
479: }
480:
481: # =============================== This pulls up a resource and its dependencies
482:
483: sub checkonthis {
484: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
485: $alreadyseen{$url}=1;
486: $r->rflush();
487: my $result=&Apache::lonnet::metadata($url,'title').' '.
488: &Apache::lonnet::metadata($url,'subject').' '.
489: &Apache::lonnet::metadata($url,'abstract').' '.
490: &Apache::lonnet::metadata($url,'keywords');
491: if (($url) && ($fulltext)) {
492: $result.=&Apache::lonnet::ssi_body($url);
493: }
494: $result=~s/\s+/ /gs;
495: my $applies=0;
496: foreach (@allwords) {
497: if ($_=~/\w/) {
498: if ($result=~/$_/si) {
499: $applies++;
500: }
501: }
502: }
503: # Does this resource apply?
504: if ($applies) {
505: $r->print('<br />');
506: for (my $i=0;$i<=$level*5;$i++) {
507: $r->print(' ');
508: }
509: $r->print('<a href="'.$url.'" target="cat">'.
510: ($title?$title:$url).'</a><br />');
511: $totalfound++;
512: } elsif ($fulltext) {
513: $r->print(' .');
514: }
515: $r->rflush();
516: # Check also the dependencies of this one
517: my $dependencies=
518: &Apache::lonnet::metadata($url,'dependencies');
519: foreach (split(/\,/,$dependencies)) {
520: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
521: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
522: }
523: }
524: }
525:
526: sub untiehash {
527: if (tied(%hash)) {
528: untie(%hash);
529: }
530: }
531:
532: } # End of course search scoping
533:
534: sub search_html_header {
535: my $Str = <<ENDHEADER;
536: <html>
537: <head>
538: <title>The LearningOnline Network with CAPA</title>
539: </head>
540: ENDHEADER
541: return $Str;
542: }
543:
544: ######################################################################
545: ######################################################################
546:
547: =pod
548:
549: =item &print_basic_search_form()
550:
551: Prints the form for the basic search. Sorry the name is so cryptic.
552:
553: =cut
554:
555: ######################################################################
556: ######################################################################
557: sub print_basic_search_form {
558: my ($r,$closebutton,$hidden_fields) = @_;
559: my $bodytag=&Apache::loncommon::bodytag('Search').
560: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
561: undef,undef,! $ENV{'form.launch'});
562: my $scrout = &search_html_header().$bodytag;
563: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
564: # Define interface components
565: my $userelatedwords=
566: &mt('[_1] use related words',
567: &Apache::lonhtmlcommon::checkbox
568: ('related',$ENV{'form.related'},'related'));
569: my $onlysearchdomain=
570: &mt('[_1] only search domain [_2]',
571: &Apache::lonhtmlcommon::checkbox('domains',
572: $ENV{'form.domains'},
573: $r->dir_config('lonDefDomain')
574: ),
575: $r->dir_config('lonDefDomain')
576: );
577: my $adv_search_link =
578: '<a href="/adm/searchcat?'.
579: 'phase=disp_adv&'.
580: 'catalogmode='.$ENV{'form.catalogmode'}.
581: '&launch='.$ENV{'form.launch'}.
582: '&mode='.$ENV{'form.mode'}.
583: '">'.&mt('Advanced Search').'</a>';
584: #
585: $scrout.='<form name="loncapa_search" method="post" '.
586: 'action="/adm/searchcat">'.
587: '<input type="hidden" name="phase" value="basic_search" />'.
588: $hidden_fields;
589: #
590: $scrout .= '<center>'.$/;
591: if ($ENV{'request.course.id'}) {
592: $scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
593: } else {
594: # No need to tell them they are searching
595: $scrout.= ('<br />'x2);
596: }
597: $scrout.='<table>'.
598: '<tr><td align="center" valign="top">'.
599: &Apache::lonhtmlcommon::textbox('basicexp',
600: $ENV{'form.basicexp'},50).'<br />'.
601: '<font size="-1">'.&searchhelp().'</font>'.'</td>'.
602: '<td><font size="-1">'.
603: '<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
604: '<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
605: '<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
606: '</font></td>'.
607: '</tr>'.$/;
608: #
609: # $scrout .= '<tr><td align="center">'.
610: # '<font size="-1">'.
611: # $userelatedwords.(' 'x3).
612: # $onlysearchdomain.(' 'x2).$adv_search_link.
613: # '</font>'.
614: # '</td></tr>'.$/;
615: $scrout .= '<tr><td align="center" colspan="2">'.
616: '<font size="-1">'.
617: '<input type="submit" name="basicsubmit" '.
618: 'value="'.&mt('Search').'" />'.
619: (' 'x2).$closebutton.(' 'x2).&viewoptions().
620: '</font>'.
621: '</td></tr>'.$/;
622: $scrout .= '</table>'.$/.'</center>'.'</form>';
623: }
624: if ($ENV{'request.course.id'}) {
625: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
626: 'header' => 'Course Search',
627: 'note' => 'Enter terms or phrases, then press "Search" below',
628: 'use' => 'use related words',
629: 'full' =>'fulltext search (time consuming)'
630: );
631: $scrout.=(<<ENDCOURSESEARCH);
632: <form name="loncapa_search" method="post" action="/adm/searchcat">
633: <center>
634: <hr />
635: <h1>$lt{'header'}</h1>
636: <input type="hidden" name="phase" value="course_search" />
637: $hidden_fields
638: <p>
639: $lt{'note'}.
640: </p>
641: <p>
642: <table>
643: <tr><td>
644: ENDCOURSESEARCH
645: $scrout.=' '.
646: &Apache::lonhtmlcommon::textbox('courseexp',
647: $ENV{'form.courseexp'},40);
648: my $crscheckbox =
649: &Apache::lonhtmlcommon::checkbox('crsfulltext',
650: $ENV{'form.crsfulltext'});
651: my $relcheckbox =
652: &Apache::lonhtmlcommon::checkbox('crsrelated',
653: $ENV{'form.crsrelated'});
654: $scrout.=(<<ENDENDCOURSE);
655: </td></tr>
656: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
657: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
658: </table><p>
659: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
660: </p>
661: </center>
662: </form>
663: ENDENDCOURSE
664: }
665: $scrout.=(<<ENDDOCUMENT);
666: </body>
667: </html>
668: ENDDOCUMENT
669: $r->print($scrout);
670: return;
671: }
672: ######################################################################
673: ######################################################################
674:
675: =pod
676:
677: =item &advanced_search_form()
678:
679: Prints the advanced search form.
680:
681: =cut
682:
683: ######################################################################
684: ######################################################################
685: sub print_advanced_search_form{
686: my ($r,$closebutton,$hidden_fields) = @_;
687: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
688: &Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
689: 'Searching',
690: undef,undef,
691: ! $ENV{'form.launch'});
692:
693: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
694: 'reset' => 'Reset',
695: 'help' => 'Help');
696: my $advanced_buttons=<<"END";
697: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
698: <input type="reset" name="reset" value='$lt{"reset"}' />
699: $closebutton
700: END
701: my $scrout=&search_html_header();
702: $scrout .= <<"ENDHEADER";
703: $bodytag
704: <form method="post" action="/adm/searchcat" name="advsearch">
705: <p>
706: $advanced_buttons
707: ENDHEADER
708: $scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
709: '<input type="hidden" name="phase" value="adv_search" />';
710: my %fields=&Apache::lonmeta::fieldnames();
711: #
712: $scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
713: $scrout .= "<table>\n";
714: $scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
715: (' 'x2).&searchhelp()."</font></td></tr>\n";
716: my %related_word_search =
717: ('title' => 1,
718: 'author' => 0,
719: 'owner' => 0,
720: 'authorspace' => 0,
721: 'modifyinguser'=> 0,
722: 'keywords' => 1,
723: 'notes' => 1,
724: 'abstract' => 1,
725: 'standards'=> 1,
726: 'mime' => 1,
727: );
728: #
729: foreach my $field ('title','author','owner','authorspace','modifyinguser',
730: 'keywords','notes','abstract','standards','mime') {
731: $scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
732: &Apache::lonmeta::prettyinput($field,
733: $ENV{'form.'.$field},
734: $field,
735: 'advsearch',
736: $related_word_search{$field},
737: '</td><td align="left">',
738: $ENV{'form.'.$field.'_related'},
739: 50);
740: if ($related_word_search{$field}) {
741: $scrout .= 'related words';
742: } else {
743: $scrout .= '</td><td> ';
744: }
745: $scrout .= '</td></tr>'.$/;
746: }
747: foreach my $field ('lowestgradelevel','highestgradelevel') {
748: $scrout.='<tr>'.
749: '<td align="right">'.&titlefield($fields{$field}).'</td>'.
750: '<td colspan="2">'.
751: &Apache::lonmeta::prettyinput($field,
752: $ENV{'form.'.$field},
753: $field,
754: 'advsearch',
755: 0).
756: '</td></tr>'.$/;
757: }
758: $scrout.='<tr><td align="right">'.
759: &titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
760: &Apache::loncommon::filecategoryselect('category',
761: $ENV{'form.category'}).
762: '</td></tr>'.$/;
763: $scrout.='<tr><td align="right" valign="top">'.
764: &titlefield(&mt('Domains')).'</td><td colspan="2">'.
765: &Apache::loncommon::domain_select('domains',
766: $ENV{'form.domains'},1).
767: '</td></tr>'.$/;
768: #
769: # Misc metadata
770: $scrout.='<tr><td align="right" valign="top">'.
771: &titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
772: &Apache::lonmeta::selectbox('copyright',
773: '',,
774: \&Apache::loncommon::copyrightdescription,
775: ( undef,
776: &Apache::loncommon::copyrightids)
777: ).'</td></tr>'.$/;
778: $scrout.='<tr><td align="right" valign="top">'.
779: &titlefield(&mt('Language')).'</td><td colspan="2">'.
780: &Apache::lonmeta::selectbox('language',
781: 'notset',,
782: \&Apache::loncommon::languagedescription,
783: ('any',&Apache::loncommon::languageids)
784: ).'</td></tr>';
785: $scrout .= "</table>\n";
786: #
787: # Dynamic metadata
788: $scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
789: $scrout .= "<table>\n";
790: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
791: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
792: foreach my $statistic
793: ({ name=>'count',
794: description=>'Network-wide number of accesses (hits)',},
795: { name=>'stdno',
796: description=>
797: 'Total number of students who have worked on this problem',},
798: { name => 'avetries',
799: description=>'Average number of tries till solved',},
800: { name => 'difficulty',
801: description=>'Degree of difficulty',},
802: { name => 'disc',
803: description=>'Degree of discrimination'}) {
804: $scrout .= '<tr><td align="right">'.
805: &titlefield(&mt($statistic->{'description'})).
806: '</td><td align="center">'.
807: '<input type="text" name="'.$statistic->{'name'}.'_min" '.
808: 'value="" size="6" />'.
809: '</td><td align="center">'.
810: '<input type="text" name="'.$statistic->{'name'}.'_max" '.
811: 'value="" size="6" />'.
812: '</td></tr>'.$/;
813: }
814: $scrout .= "</table>\n";
815: $scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
816: $scrout .= "<table>\n";
817: $scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
818: '<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
819: foreach my $evaluation
820: ( { name => 'clear',
821: description => 'Material presented in clear way'},
822: { name =>'depth',
823: description => 'Material covered with sufficient depth'},
824: { name => 'helpful',
825: description => 'Material is helpful'},
826: { name => 'correct',
827: description => 'Material appears to be correct'},
828: { name => 'technical',
829: description => 'Resource is technically correct'}){
830: $scrout .= '<tr><td align="right">'.
831: &titlefield(&mt($evaluation->{'description'})).
832: '</td><td align="center">'.
833: '<input type="text" name="'.$evaluation->{'name'}.'_min" '.
834: 'value="" size="6" />'.
835: '</td><td align="center">'.
836: '<input type="text" name="'.$evaluation->{'name'}.'_max" '.
837: 'value="" size="6" />'.
838: '</td></tr>'.$/;
839: }
840: $scrout .= "</table>\n";
841: #
842: # Creation/Modification date limits
843: $scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
844: $scrout .= "\n<table>\n";
845: my $cafter =
846: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
847: 'creationdate1', # fieldname
848: 0, # current value
849: '', # special
850: 1, # includeempty
851: '', # state
852: 1, # no_hh_mm_ss
853: );
854: my $cbefore =
855: &Apache::lonhtmlcommon::date_setter('advsearch', # formname
856: 'creationdate2', # fieldname
857: 0, # current value
858: '', # special
859: 1, # includeempty
860: '', # state
861: 1, # no_hh_mm_ss
862: );
863: $scrout .= &mt('<tr><td align="right">Created between</td>'.
864: '<td>[_1]</td></tr>'.
865: '<tr><td align="right">and </td>'.
866: '<td>[_2]</td></tr>',$cafter,$cbefore);
867: my $lafter =
868: &Apache::lonhtmlcommon::date_setter('advsearch',
869: 'revisiondate1',
870: 0, # current value
871: '', # special
872: 1, # includeempty
873: '', # state
874: 1, # no_hh_mm_ss
875: );
876: my $lbefore =
877: &Apache::lonhtmlcommon::date_setter('advsearch',
878: 'revisiondate2',
879: 0, # current value
880: '', # special
881: 1, # includeempty
882: '', # state
883: 1, # no_hh_mm_ss
884: );
885: $scrout .= &mt('<tr><td align="right">Last modified between </td>'.
886: '<td>[_1]</td></tr>'.
887: '<tr><td align="right">and</td>'.
888: '<td>[_2]</td></tr>',$lafter,$lbefore);
889: $scrout.="</table>\n";
890: $scrout.=<<ENDDOCUMENT;
891: $advanced_buttons
892: </form>
893: </body>
894: </html>
895: ENDDOCUMENT
896: $r->print($scrout);
897: return;
898: }
899:
900: ######################################################################
901: ######################################################################
902:
903: =pod
904:
905: =item &titlefield()
906:
907: Inputs: title text
908:
909: Outputs: titletext with font wrapper
910:
911: =cut
912:
913: ######################################################################
914: ######################################################################
915: sub titlefield {
916: my $title=shift;
917: return $title;
918: }
919:
920: ######################################################################
921: ######################################################################
922:
923: =pod
924:
925: =item viewoptiontext()
926:
927: Inputs: codename for view option
928:
929: Outputs: displayed text
930:
931: =cut
932:
933: ######################################################################
934: ######################################################################
935: sub viewoptiontext {
936: my $code=shift;
937: my %desc=&Apache::lonlocal::texthash
938: ('detailed' => "Detailed Citation View",
939: 'xml' => 'XML/SGML',
940: 'compact' => 'Compact View',
941: 'fielded' => 'Fielded Format',
942: 'summary' => 'Summary View');
943: return $desc{$code};
944: }
945:
946: ######################################################################
947: ######################################################################
948:
949: =pod
950:
951: =item viewoptions()
952:
953: Inputs: none
954:
955: Outputs: text for box with view options
956:
957: =cut
958:
959: ######################################################################
960: ######################################################################
961: sub viewoptions {
962: my $scrout="\n".'<nobr>';
963: if (! defined($ENV{'form.viewselect'})) {
964: $ENV{'form.viewselect'}='detailed';
965: }
966: $scrout.=&Apache::lonmeta::selectbox('viewselect',
967: $ENV{'form.viewselect'},
968: \&viewoptiontext,
969: sort(keys(%Views)));
970: $scrout.= ' ';
971: my $countselect = &Apache::lonmeta::selectbox('show',
972: $ENV{'form.show'},
973: undef,
974: (10,20,50,100,1000,10000));
975: $scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
976: '</nobr>'.$/;
977: return $scrout;
978: }
979:
980: ######################################################################
981: ######################################################################
982:
983: =pod
984:
985: =item searchhelp()
986:
987: Inputs: none
988:
989: Outputs: return little blurb on how to enter searches
990:
991: =cut
992:
993: ######################################################################
994: ######################################################################
995: sub searchhelp {
996: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
997: }
998:
999: ######################################################################
1000: ######################################################################
1001:
1002: =pod
1003:
1004: =item &get_persistent_form_data()
1005:
1006: Inputs: filename of database
1007:
1008: Outputs: returns undef on database errors.
1009:
1010: This function is the reverse of &make_persistent() for form data.
1011: Retrieve persistent data from %persistent_db. Retrieved items will have their
1012: values unescaped. If a form value already exists in $ENV, it will not be
1013: overwritten. Form values that are array references may have values appended
1014: to them.
1015:
1016: =cut
1017:
1018: ######################################################################
1019: ######################################################################
1020: sub get_persistent_form_data {
1021: my $filename = shift;
1022: return 0 if (! -e $filename);
1023: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1024: &GDBM_READER(),0640));
1025: #
1026: # These make sure we do not get array references printed out as 'values'.
1027: my %arrays_allowed = ('form.domains'=>1);
1028: #
1029: # Loop through the keys, looking for 'form.'
1030: foreach my $name (keys(%persistent_db)) {
1031: next if ($name !~ /^form./);
1032: # Kludgification begins!
1033: if ($name eq 'form.domains' &&
1034: $ENV{'form.searchmode'} eq 'basic' &&
1035: $ENV{'form.phase'} ne 'disp_basic') {
1036: next;
1037: }
1038: # End kludge (hopefully)
1039: next if (exists($ENV{$name}));
1040: my @values = map {
1041: &Apache::lonnet::unescape($_);
1042: } split(',',$persistent_db{$name});
1043: next if (@values <1);
1044: if ($arrays_allowed{$name}) {
1045: $ENV{$name} = [@values];
1046: } else {
1047: $ENV{$name} = $values[0] if ($values[0]);
1048: }
1049: }
1050: untie (%persistent_db);
1051: return 1;
1052: }
1053:
1054: ######################################################################
1055: ######################################################################
1056:
1057: =pod
1058:
1059: =item &get_persistent_data()
1060:
1061: Inputs: filename of database, ref to array of values to recover.
1062:
1063: Outputs: array of values. Returns undef on error.
1064:
1065: This function is the reverse of &make_persistent();
1066: Retrieve persistent data from %persistent_db. Retrieved items will have their
1067: values unescaped. If the item contains commas (before unescaping), the
1068: returned value will be an array pointer.
1069:
1070: =cut
1071:
1072: ######################################################################
1073: ######################################################################
1074: sub get_persistent_data {
1075: my $filename = shift;
1076: my @Vars = @{shift()};
1077: my @Values; # Return array
1078: return undef if (! -e $filename);
1079: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
1080: &GDBM_READER(),0640));
1081: foreach my $name (@Vars) {
1082: if (! exists($persistent_db{$name})) {
1083: push @Values, undef;
1084: next;
1085: }
1086: my @values = map {
1087: &Apache::lonnet::unescape($_);
1088: } split(',',$persistent_db{$name});
1089: if (@values <= 1) {
1090: push @Values,$values[0];
1091: } else {
1092: push @Values,\@values;
1093: }
1094: }
1095: untie (%persistent_db);
1096: return @Values;
1097: }
1098:
1099: ######################################################################
1100: ######################################################################
1101:
1102: =pod
1103:
1104: =item &make_persistent()
1105:
1106: Inputs: Hash of values to save, filename of persistent database.
1107:
1108: Store variables away to the %persistent_db.
1109: Values will be escaped. Values that are array pointers will have their
1110: elements escaped and concatenated in a comma separated string.
1111:
1112: =cut
1113:
1114: ######################################################################
1115: ######################################################################
1116: sub make_persistent {
1117: my %save = %{shift()};
1118: my $filename = shift;
1119: return undef if (! tie(%persistent_db,'GDBM_File',
1120: $filename,&GDBM_WRCREAT(),0640));
1121: foreach my $name (keys(%save)) {
1122: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
1123: # We handle array references, but not recursively.
1124: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
1125: $persistent_db{$name} = $store;
1126: }
1127: untie(%persistent_db);
1128: return 1;
1129: }
1130:
1131: ######################################################################
1132: ######################################################################
1133:
1134: =pod
1135:
1136: =item &make_form_data_persistent()
1137:
1138: Inputs: filename of persistent database.
1139:
1140: Store most form variables away to the %persistent_db.
1141: Values will be escaped. Values that are array pointers will have their
1142: elements escaped and concatenated in a comma separated string.
1143:
1144: =cut
1145:
1146: ######################################################################
1147: ######################################################################
1148: sub make_form_data_persistent {
1149: my $r = shift;
1150: my $filename = shift;
1151: my %save;
1152: foreach (keys(%ENV)) {
1153: next if (!/^form/ || /submit/);
1154: $save{$_} = $ENV{$_};
1155: }
1156: return &make_persistent(\%save,$filename);
1157: }
1158:
1159: ######################################################################
1160: ######################################################################
1161:
1162: =pod
1163:
1164: =item &parse_advanced_search()
1165:
1166: Parse advanced search form and return the following:
1167:
1168: =over 4
1169:
1170: =item $query Scalar containing an SQL query.
1171:
1172: =item $customquery Scalar containing a custom query.
1173:
1174: =item $customshow Scalar containing commands to show custom metadata.
1175:
1176: =item $libraries_to_query Reference to array of domains to search.
1177:
1178: =back
1179:
1180: =cut
1181:
1182: ######################################################################
1183: ######################################################################
1184: sub parse_advanced_search {
1185: my ($r,$closebutton,$hidden_fields)=@_;
1186: my @BasicFields = ('title','author','subject','keywords','url','version',
1187: 'notes','abstract','extension','owner',
1188: # 'custommetadata','customshow',
1189: 'modifyinguser','standards','mime');
1190: my @StatsFields = &statfields();
1191: my @EvalFields = &evalfields();
1192: my $fillflag=0;
1193: my $pretty_search_string = "<br />\n";
1194: # Clean up fields for safety
1195: for my $field (@BasicFields,
1196: 'creationdatestart_month','creationdatestart_day',
1197: 'creationdatestart_year','creationdateend_month',
1198: 'creationdateend_day','creationdateend_year',
1199: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1200: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1201: 'lastrevisiondateend_day','lastrevisiondateend_year') {
1202: $ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1203: $ENV{'form.'.$field}=~s/(not\s*$|^\s*(and|or)|)//gi;
1204: }
1205: foreach ('mode','form','element') {
1206: # is this required? Hmmm.
1207: next if (! exists($ENV{'form.'.$_}));
1208: $ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
1209: $ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1210: }
1211: # Preprocess the category form element.
1212: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1213: ref($ENV{'form.category'}));
1214: #
1215: # Check to see if enough information was filled in
1216: foreach my $field (@BasicFields) {
1217: if (&filled($ENV{'form.'.$field})) {
1218: $fillflag++;
1219: }
1220: }
1221: foreach my $field (@StatsFields,@EvalFields) {
1222: if (&filled($ENV{'form.'.$field.'_max'})) {
1223: $fillflag++;
1224: }
1225: if (&filled($ENV{'form.'.$field.'_min'})) {
1226: $fillflag++;
1227: }
1228: }
1229:
1230: for my $field ('lowestgradelevel','highestgradelevel') {
1231: if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
1232: $ENV{'form.'.$field} > 0) {
1233: $fillflag++;
1234: }
1235: }
1236: if (! $fillflag) {
1237: &output_blank_field_error($r,$closebutton,
1238: 'phase=disp_adv',$hidden_fields);
1239: return ;
1240: }
1241: # Turn the form input into a SQL-based query
1242: my $query='';
1243: my @queries;
1244: my $font = '<font color="#800000" face="helvetica">';
1245: # Evaluate logical expression AND/OR/NOT phrase fields.
1246: foreach my $field (@BasicFields) {
1247: if ($ENV{'form.'.$field}) {
1248: my $searchphrase = $ENV{'form.'.$field};
1249: $pretty_search_string .= $font."$field</font> contains <b>".
1250: $searchphrase."</b>";
1251: if ($ENV{'form.'.$field.'_related'}) {
1252: my @New_Words;
1253: ($searchphrase,@New_Words) = &related_version($searchphrase);
1254: if (@New_Words) {
1255: $pretty_search_string .= " with related words: ".
1256: "<b>@New_Words</b>.";
1257: } else {
1258: $pretty_search_string .= " with no related words.";
1259: }
1260: }
1261: $pretty_search_string .= "<br />\n";
1262: push @queries,&build_SQL_query($field,$searchphrase);
1263: }
1264: }
1265: #
1266: # Make the 'mime' from 'form.category' and 'form.extension'
1267: #
1268: my $searchphrase;
1269: if (exists($ENV{'form.category'}) &&
1270: $ENV{'form.category'} !~ /^\s*$/ &&
1271: $ENV{'form.category'} ne 'any') {
1272: my @extensions = &Apache::loncommon::filecategorytypes
1273: ($ENV{'form.category'});
1274: if (scalar(@extensions) > 0) {
1275: $searchphrase = join(' OR ',@extensions);
1276: }
1277: }
1278: if (defined($searchphrase)) {
1279: push @queries,&build_SQL_query('mime',$searchphrase);
1280: $pretty_search_string .=$font.'mime</font> contains <b>'.
1281: $searchphrase.'</b><br />';
1282: }
1283: #
1284: # Evaluate option lists
1285: if ($ENV{'form.lowestgradelevel'} &&
1286: $ENV{'form.lowestgradelevel'} ne '0' &&
1287: $ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
1288: push(@queries,
1289: '(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
1290: $pretty_search_string.="lowestgradelevel>=".
1291: $ENV{'form.lowestgradelevel'}."<br />\n";
1292: }
1293: if ($ENV{'form.highestgradelevel'} &&
1294: $ENV{'form.highestgradelevel'} ne '0' &&
1295: $ENV{'form.highestgradelevel'} =~ /^\d+$/) {
1296: push(@queries,
1297: '(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
1298: $pretty_search_string.="highestgradelevel<=".
1299: $ENV{'form.highestgradelevel'}."<br />\n";
1300: }
1301: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1302: push @queries,"(language like \"$ENV{'form.language'}\")";
1303: $pretty_search_string.=$font."language</font>= ".
1304: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1305: "<br />\n";
1306: }
1307: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1308: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1309: $pretty_search_string.=$font."copyright</font> = ".
1310: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1311: "<br \>\n";
1312: }
1313: #
1314: # Statistics
1315: foreach my $field (@StatsFields,@EvalFields) {
1316: my ($min,$max);
1317: if (exists($ENV{'form.'.$field.'_min'}) &&
1318: $ENV{'form.'.$field.'_min'} ne '') {
1319: $min = $ENV{'form.'.$field.'_min'};
1320: }
1321: if (exists($ENV{'form.'.$field.'_max'}) &&
1322: $ENV{'form.'.$field.'_max'} ne '') {
1323: $max = $ENV{'form.'.$field.'_max'};
1324: }
1325: next if (! defined($max) && ! defined($min));
1326: if (defined($min) && defined($max)) {
1327: ($min,$max) = sort {$a <=>$b} ($min,$max);
1328: }
1329: if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1330: push(@queries,'('.$field.'>'.$min.')');
1331: $pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
1332: }
1333: if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
1334: push(@queries,'('.$field.'<'.$max.')');
1335: $pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
1336: }
1337: }
1338: #
1339: # Evaluate date windows
1340: my $cafter =
1341: &Apache::lonhtmlcommon::get_date_from_form('creationdate1');
1342: my $cbefore =
1343: &Apache::lonhtmlcommon::get_date_from_form('creationdate2');
1344: if ($cafter > $cbefore) {
1345: my $tmp = $cafter;
1346: $cafter = $cbefore;
1347: $cbefore = $tmp;
1348: }
1349: my $mafter =
1350: &Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
1351: my $mbefore =
1352: &Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
1353: if ($mafter > $mbefore) {
1354: my $tmp = $mafter;
1355: $mafter = $mbefore;
1356: $mbefore = $tmp;
1357: }
1358: my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
1359: $mafter,$mbefore);
1360: if (defined($error)) {
1361: &output_date_error($r,$error,$closebutton,$hidden_fields);
1362: } elsif (defined($datequery)) {
1363: # Here is where you would set up pretty_search_string to output
1364: # date query information.
1365: $pretty_search_string .= '<br />'.$prettydate.'<br />';
1366: push @queries,$datequery;
1367: }
1368: #
1369: # Process form information for custom metadata querying
1370: my $customquery=undef;
1371: ##
1372: ## The custom metadata search was removed q long time ago mostly
1373: ## because I was unable to figureout exactly how it worked and could
1374: ## not imagine people actually using it. MH
1375: ##
1376: # if ($ENV{'form.custommetadata'}) {
1377: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1378: # $ENV{'form.custommetadata'}."</b><br />\n";
1379: # $customquery=&build_custommetadata_query('custommetadata',
1380: # $ENV{'form.custommetadata'});
1381: # }
1382: my $customshow=undef;
1383: # if ($ENV{'form.customshow'}) {
1384: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1385: # $ENV{'form.customshow'}."</b><br />\n";
1386: # $customshow=$ENV{'form.customshow'};
1387: # $customshow=~s/[^\w\s]//g;
1388: # my @fields=split(/\s+/,$customshow);
1389: # $customshow=join(" ",@fields);
1390: # }
1391: ##
1392: ## Deal with restrictions to given domains
1393: ##
1394: my ($libraries_to_query,$pretty_domains_string) =
1395: &parse_domain_restrictions();
1396: $pretty_search_string .= $pretty_domains_string."<br />\n";
1397: #
1398: if (@queries) {
1399: $query="select * from metadata where ".join(" AND ",@queries);
1400: } elsif ($customquery) {
1401: $query = '';
1402: }
1403: # &Apache::lonnet::logthis('query = '.$/.$query);
1404: return ($query,$customquery,$customshow,$libraries_to_query,
1405: $pretty_search_string);
1406: }
1407:
1408: sub parse_domain_restrictions {
1409: my $libraries_to_query = undef;
1410: # $ENV{'form.domains'} can be either a scalar or an array reference.
1411: # We need an array.
1412: if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
1413: return (undef,'');
1414: }
1415: my @allowed_domains;
1416: if (ref($ENV{'form.domains'})) {
1417: @allowed_domains = @{$ENV{'form.domains'}};
1418: } else {
1419: @allowed_domains = ($ENV{'form.domains'});
1420: }
1421: #
1422: my %domain_hash = ();
1423: my $pretty_domains_string;
1424: foreach (@allowed_domains) {
1425: $domain_hash{$_}++;
1426: }
1427: if ($domain_hash{'any'}) {
1428: $pretty_domains_string = "In all LON-CAPA domains.";
1429: } else {
1430: if (@allowed_domains > 1) {
1431: $pretty_domains_string = "In LON-CAPA domains:";
1432: } else {
1433: $pretty_domains_string = "In LON-CAPA domain ";
1434: }
1435: foreach (sort @allowed_domains) {
1436: $pretty_domains_string .= "<b>".$_."</b> ";
1437: }
1438: foreach (keys(%Apache::lonnet::libserv)) {
1439: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1440: push @$libraries_to_query,$_;
1441: }
1442: }
1443: }
1444: return ($libraries_to_query,$pretty_domains_string);
1445: }
1446:
1447: ######################################################################
1448: ######################################################################
1449:
1450: =pod
1451:
1452: =item &parse_basic_search()
1453:
1454: Parse the basic search form and return a scalar containing an sql query.
1455:
1456: =cut
1457:
1458: ######################################################################
1459: ######################################################################
1460: sub parse_basic_search {
1461: my ($r,$closebutton)=@_;
1462: #
1463: # Clean up fields for safety
1464: for my $field ('basicexp') {
1465: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1466: }
1467: foreach ('mode','form','element') {
1468: # is this required? Hmmm.
1469: next unless (exists($ENV{"form.$_"}));
1470: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1471: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1472: }
1473: my ($libraries_to_query,$pretty_domains_string) =
1474: &parse_domain_restrictions();
1475: #
1476: # Check to see if enough of a query is filled in
1477: my $search_string = $ENV{'form.basicexp'};
1478: $search_string =~ s/(not\s*$|^\s*(and|or)|)//gi;
1479: if (! &filled($search_string)) {
1480: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1481: return OK;
1482: }
1483: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1484: if ($ENV{'form.related'}) {
1485: my @New_Words;
1486: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1487: if (@New_Words) {
1488: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1489: } else {
1490: $pretty_search_string .= " with no related words.";
1491: }
1492: }
1493: #
1494: # Build SQL query string based on form page
1495: my $query='';
1496: my $concatarg=join(',',
1497: ('title', 'author', 'subject', 'notes', 'abstract',
1498: 'keywords'));
1499: $concatarg='title' if $ENV{'form.titleonly'};
1500: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1501: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1502: $pretty_search_string .= ' '.$pretty_domains_string;
1503: }
1504: $pretty_search_string .= "<br />\n";
1505: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1506: # &Apache::lonnet::logthis($final_query);
1507: return ($final_query,$pretty_search_string,
1508: $libraries_to_query);
1509: }
1510:
1511: ######################################################################
1512: ######################################################################
1513:
1514: =pod
1515:
1516: =item &related_version()
1517:
1518: Modifies an input string to include related words. Words in the string
1519: are replaced with parenthesized lists of 'OR'd words. For example
1520: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1521:
1522: Note: Using this twice on a string is probably silly.
1523:
1524: =cut
1525:
1526: ######################################################################
1527: ######################################################################
1528: sub related_version {
1529: my $search_string = shift;
1530: my $result = $search_string;
1531: my %New_Words = ();
1532: while ($search_string =~ /(\w+)/cg) {
1533: my $word = $1;
1534: next if (lc($word) =~ /\b(or|and|not)\b/);
1535: my @Words = &Apache::loncommon::get_related_words($word);
1536: @Words = ($#Words>4? @Words[0..4] : @Words);
1537: foreach (@Words) { $New_Words{$_}++;}
1538: my $replacement = join " OR ", ($word,@Words);
1539: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1540: }
1541: return $result,sort(keys(%New_Words));
1542: }
1543:
1544: ######################################################################
1545: ######################################################################
1546:
1547: =pod
1548:
1549: =item &build_SQL_query()
1550:
1551: Builds a SQL query string from a logical expression with AND/OR keywords
1552: using Text::Query and &recursive_SQL_query_builder()
1553:
1554: =cut
1555:
1556: ######################################################################
1557: ######################################################################
1558: sub build_SQL_query {
1559: my ($field_name,$logic_statement)=@_;
1560: my $q=new Text::Query('abc',
1561: -parse => 'Text::Query::ParseAdvanced',
1562: -build => 'Text::Query::Build');
1563: $q->prepare($logic_statement);
1564: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1565: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1566: return $sql_query;
1567: }
1568:
1569: ######################################################################
1570: ######################################################################
1571:
1572: =pod
1573:
1574: =item &build_custommetadata_query()
1575:
1576: Constructs a custom metadata query using a rather heinous regular
1577: expression.
1578:
1579: =cut
1580:
1581: ######################################################################
1582: ######################################################################
1583: sub build_custommetadata_query {
1584: my ($field_name,$logic_statement)=@_;
1585: my $q=new Text::Query('abc',
1586: -parse => 'Text::Query::ParseAdvanced',
1587: -build => 'Text::Query::BuildAdvancedString');
1588: $q->prepare($logic_statement);
1589: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1590: # quick fix to change literal into xml tag-matching
1591: # will eventually have to write a separate builder module
1592: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1593: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1594: /\\<$1\\>?# \<wordone\>
1595: \[\^\\<\]?# [^\<]
1596: \*$2\[\^\\<\]?# *wordtwo[^\<]
1597: \*\\<\\\/$1\\>?# *\<\/wordone\>
1598: /g;
1599: return $matchexp;
1600: }
1601:
1602: ######################################################################
1603: ######################################################################
1604:
1605: =pod
1606:
1607: =item &recursive_SQL_query_build()
1608:
1609: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1610:
1611: =cut
1612:
1613: ######################################################################
1614: ######################################################################
1615: sub recursive_SQL_query_build {
1616: my ($dkey,$pattern)=@_;
1617: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1618: return $pattern unless @matches;
1619: foreach my $match (@matches) {
1620: $match=~/\[ (\w+)\s(.*) \]/;
1621: my ($key,$value)=($1,$2);
1622: my $replacement='';
1623: if ($key eq 'literal') {
1624: $replacement="($dkey LIKE \"\%$value\%\")";
1625: } elsif (lc($key) eq 'not') {
1626: $value=~s/LIKE/NOT LIKE/;
1627: # $replacement="($dkey not like $value)";
1628: $replacement="$value";
1629: } elsif ($key eq 'and') {
1630: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1631: $replacement="($1 AND $2)";
1632: } elsif ($key eq 'or') {
1633: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1634: $replacement="($1 OR $2)";
1635: }
1636: substr($pattern,
1637: index($pattern,$match),
1638: length($match),
1639: $replacement);
1640: }
1641: &recursive_SQL_query_build($dkey,$pattern);
1642: }
1643:
1644: ######################################################################
1645: ######################################################################
1646:
1647: =pod
1648:
1649: =item &build_date_queries()
1650:
1651: Builds a SQL logic query to check time/date entries.
1652: Also reports errors (check for /^Incorrect/).
1653:
1654: =cut
1655:
1656: ######################################################################
1657: ######################################################################
1658: sub build_date_queries {
1659: my ($cafter,$cbefore,$mafter,$mbefore) = @_;
1660: my ($result,$error,$pretty_string);
1661: #
1662: # Verify the input
1663: if (! defined($cafter) && ! defined($cbefore) &&
1664: ! defined($mafter) && ! defined($mbefore)) {
1665: # This is an okay situation, so return undef for the error
1666: return (undef,undef,undef);
1667: }
1668: if ((defined($cafter) && ! defined($cbefore)) ||
1669: (defined($cbefore) && ! defined($cafter))) {
1670: # This is bad, so let them know
1671: $error = &mt('Incorrect entry for the creation date. '.
1672: 'You must specify both the beginning and ending dates.');
1673: }
1674: if (! defined($error) &&
1675: ((defined($mafter) && ! defined($mbefore)) ||
1676: (defined($mbefore) && ! defined($mafter)))) {
1677: # This is also bad, so let them know
1678: $error = &mt('Incorrect entry for the last revision date. '.
1679: 'You must specify both the beginning and ending dates.');
1680: }
1681: if (! defined($error)) {
1682: #
1683: # Build the queries
1684: my @queries;
1685: if (defined($cbefore) && defined($cafter)) {
1686: my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
1687: my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
1688: # Correct for year being relative to 1900
1689: $cayear+=1900; $cbyear+=1900;
1690: my $cquery=
1691: '(creationdate BETWEEN '.
1692: "'".$cayear.'-'.$camon.'-'.$caday."'".
1693: ' AND '.
1694: "'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
1695: $pretty_string .= '<br />' if (defined($pretty_string));
1696: $pretty_string .=
1697: &mt('created between [_1] and [_2]',
1698: &Apache::lonlocal::locallocaltime($cafter),
1699: &Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
1700: push(@queries,$cquery);
1701: $pretty_string =~ s/ 00:00:00//g;
1702: }
1703: if (defined($mbefore) && defined($mafter)) {
1704: my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
1705: my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
1706: # Correct for year being relative to 1900
1707: $mayear+=1900; $mbyear+=1900;
1708: my $mquery=
1709: '(lastrevisiondate BETWEEN '.
1710: "'".$mayear.'-'.$mamon.'-'.$maday."'".
1711: ' AND '.
1712: "'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
1713: push(@queries,$mquery);
1714: $pretty_string .= '<br />' if (defined($pretty_string));
1715: $pretty_string .=
1716: &mt('last revised between [_1] and [_2]',
1717: &Apache::lonlocal::locallocaltime($mafter),
1718: &Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
1719: $pretty_string =~ s/ 00:00:00//g;
1720: }
1721: if (@queries) {
1722: $result .= join(" AND ",@queries);
1723: }
1724: }
1725: return ($result,$error,$pretty_string);
1726: }
1727:
1728: ######################################################################
1729: ######################################################################
1730:
1731: =pod
1732:
1733: =item ©right_check()
1734:
1735: Inputs: $Metadata, a hash pointer of metadata for a resource.
1736:
1737: Returns: 1 if the resource is available to the user making the query,
1738: 0 otherwise.
1739:
1740: =cut
1741:
1742: ######################################################################
1743: ######################################################################
1744: sub copyright_check {
1745: my $Metadata = shift;
1746: # Check copyright tags and skip results the user cannot use
1747: my (undef,undef,$resdom,$resname) = split('/',
1748: $Metadata->{'url'});
1749: # Check for priv
1750: if (($Metadata->{'copyright'} eq 'priv') &&
1751: (($ENV{'user.name'} ne $resname) &&
1752: ($ENV{'user.domain'} ne $resdom))) {
1753: return 0;
1754: }
1755: # Check for domain
1756: if (($Metadata->{'copyright'} eq 'domain') &&
1757: ($ENV{'user.domain'} ne $resdom)) {
1758: return 0;
1759: }
1760: return 1;
1761: }
1762:
1763: ######################################################################
1764: ######################################################################
1765:
1766: =pod
1767:
1768: =item &ensure_db_and_table()
1769:
1770: Ensure we can get lonmysql to connect to the database and the table we
1771: need exists.
1772:
1773: Inputs: $r, table id
1774:
1775: Returns: undef on error, 1 if the table exists.
1776:
1777: =cut
1778:
1779: ######################################################################
1780: ######################################################################
1781: sub ensure_db_and_table {
1782: my ($r,$table) = @_;
1783: ##
1784: ## Sanity check the table id.
1785: ##
1786: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1787: $r->print("Unable to retrieve search results. ".
1788: "Unable to determine the table results were stored in. ".
1789: "</body></html>");
1790: return undef;
1791: }
1792: ##
1793: ## Make sure we can connect and the table exists.
1794: ##
1795: my $connection_result = &Apache::lonmysql::connect_to_db();
1796: if (!defined($connection_result)) {
1797: $r->print("Unable to connect to the MySQL database where your results".
1798: " are stored. </body></html>");
1799: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1800: " connect to database.");
1801: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1802: return undef;
1803: }
1804: my $table_check = &Apache::lonmysql::check_table($table);
1805: if (! defined($table_check)) {
1806: $r->print("A MySQL error has occurred.</form></body></html>");
1807: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1808: " of table ".$table);
1809: return undef;
1810: } elsif (! $table_check) {
1811: $r->print("The table of results could not be found.");
1812: &Apache::lonnet::logthis("The user requested a table, ".$table.
1813: ", that could not be found.");
1814: return undef;
1815: }
1816: return 1;
1817: }
1818:
1819: ######################################################################
1820: ######################################################################
1821:
1822: =pod
1823:
1824: =item &print_sort_form()
1825:
1826: The sort feature is not implemented at this time. This form just prints
1827: a link to change the search query.
1828:
1829: =cut
1830:
1831: ######################################################################
1832: ######################################################################
1833: sub print_sort_form {
1834: my ($r,$pretty_query_string) = @_;
1835: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1836: ##
1837: my %SortableFields=&Apache::lonlocal::texthash(
1838: id => 'Default',
1839: title => 'Title',
1840: author => 'Author',
1841: subject => 'Subject',
1842: url => 'URL',
1843: version => 'Version Number',
1844: mime => 'Mime type',
1845: lang => 'Language',
1846: owner => 'Owner/Publisher',
1847: copyright => 'Copyright',
1848: hostname => 'Host',
1849: creationdate => 'Creation Date',
1850: lastrevisiondate => 'Revision Date'
1851: );
1852: ##
1853: my $table = $ENV{'form.table'};
1854: return if (! &ensure_db_and_table($r,$table));
1855: ##
1856: ## Get the number of results
1857: ##
1858: my $total_results = &Apache::lonmysql::number_of_rows($table);
1859: if (! defined($total_results)) {
1860: $r->print("A MySQL error has occurred.</form></body></html>");
1861: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1862: " of rows in table ".$table);
1863: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1864: return;
1865: }
1866: my $result;
1867: $result.=<<END;
1868: <html>
1869: <head>
1870: <script>
1871: function change_sort() {
1872: var newloc = "/adm/searchcat?phase=results";
1873: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1874: newloc += "&sortby=";
1875: newloc += document.forms.statusform.elements.sortby.value;
1876: parent.resultsframe.location= newloc;
1877: }
1878: </script>
1879: <title>Results</title>
1880: </head>
1881: $bodytag
1882: <form name="statusform" action="" method="post">
1883: <input type="hidden" name="Queue" value="" />
1884: END
1885:
1886: #<h2>Sort Results</h2>
1887: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1888: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1889: # foreach (keys(%SortableFields)) {
1890: # $result.="<option name=\"$_\"";
1891: # if ($_ eq $ENV{'form.sortby'}) {
1892: # $result.=" selected ";
1893: # }
1894: # $result.=" >$SortableFields{$_}</option>\n";
1895: # }
1896: # $result.="</select>\n";
1897: my $revise = &revise_button();
1898: $result.=<<END;
1899: <p>
1900: There are $total_results matches to your query. $revise
1901: </p><p>
1902: Search:$pretty_query_string
1903: </p>
1904: </form>
1905: </body>
1906: </html>
1907: END
1908: $r->print($result);
1909: return;
1910: }
1911:
1912: #####################################################################
1913: #####################################################################
1914:
1915: =pod
1916:
1917: =item MySQL Table Description
1918:
1919: MySQL table creation requires a precise description of the data to be
1920: stored. The use of the correct types to hold data is vital to efficient
1921: storage and quick retrieval of records. The columns must be described in
1922: the following format:
1923:
1924: =cut
1925:
1926: #####################################################################
1927: #####################################################################
1928: #
1929: # These should probably be scoped but I don't have time right now...
1930: #
1931: my @Datatypes;
1932: my @Fullindicies;
1933:
1934: ######################################################################
1935: ######################################################################
1936:
1937: =pod
1938:
1939: =item &create_results_table()
1940:
1941: Creates the table of search results by calling lonmysql. Stores the
1942: table id in $ENV{'form.table'}
1943:
1944: Inputs: none.
1945:
1946: Returns: the identifier of the table on success, undef on error.
1947:
1948: =cut
1949:
1950: ######################################################################
1951: ######################################################################
1952: sub set_up_table_structure {
1953: my ($datatypes,$fullindicies) =
1954: &LONCAPA::lonmetadata::describe_metadata_storage();
1955: # Copy the table description before modifying it...
1956: @Datatypes = @{$datatypes};
1957: unshift(@Datatypes,{name => 'id',
1958: type => 'MEDIUMINT',
1959: restrictions => 'UNSIGNED NOT NULL',
1960: primary_key => 'yes',
1961: auto_inc => 'yes' });
1962: @Fullindicies = @{$fullindicies};
1963: return;
1964: }
1965:
1966: sub create_results_table {
1967: &set_up_table_structure();
1968: my $table = &Apache::lonmysql::create_table
1969: ( { columns => \@Datatypes,
1970: FULLTEXT => [{'columns' => \@Fullindicies},],
1971: } );
1972: if (defined($table)) {
1973: $ENV{'form.table'} = $table;
1974: return $table;
1975: }
1976: return undef; # Error...
1977: }
1978:
1979: ######################################################################
1980: ######################################################################
1981:
1982: =pod
1983:
1984: =item Search Status update functions
1985:
1986: Each of the following functions changes the values of one of the
1987: input fields used to display the search status to the user. The names
1988: should be explanatory.
1989:
1990: Inputs: Apache request handler ($r), text to display.
1991:
1992: Returns: Nothing.
1993:
1994: =over 4
1995:
1996: =item &update_count_status()
1997:
1998: =item &update_status()
1999:
2000: =item &update_seconds()
2001:
2002: =back
2003:
2004: =cut
2005:
2006: ######################################################################
2007: ######################################################################
2008: sub update_count_status {
2009: my ($r,$text) = @_;
2010: $text =~ s/\'/\\\'/g;
2011: $r->print
2012: ("<script>document.statusform.count.value = ' $text'</script>\n");
2013: $r->rflush();
2014: }
2015:
2016: sub update_status {
2017: my ($r,$text) = @_;
2018: $text =~ s/\'/\\\'/g;
2019: $r->print
2020: ("<script>document.statusform.status.value = ' $text'</script>\n");
2021: $r->rflush();
2022: }
2023:
2024: {
2025: my $max_time = 40; # seconds for the search to complete
2026: my $start_time = 0;
2027: my $last_time = 0;
2028:
2029: sub reset_timing {
2030: $start_time = 0;
2031: $last_time = 0;
2032: }
2033:
2034: sub time_left {
2035: if ($start_time == 0) {
2036: $start_time = time;
2037: }
2038: my $time_left = $max_time - (time - $start_time);
2039: $time_left = 0 if ($time_left < 0);
2040: return $time_left;
2041: }
2042:
2043: sub update_seconds {
2044: my ($r) = @_;
2045: my $time = &time_left();
2046: if (($last_time-$time) > 0) {
2047: $r->print("<script>".
2048: "document.statusform.seconds.value = '$time'".
2049: "</script>\n");
2050: $r->rflush();
2051: }
2052: $last_time = $time;
2053: }
2054:
2055: }
2056:
2057: ######################################################################
2058: ######################################################################
2059:
2060: =pod
2061:
2062: =item &revise_button()
2063:
2064: Inputs: None
2065:
2066: Returns: html string for a 'revise search' button.
2067:
2068: =cut
2069:
2070: ######################################################################
2071: ######################################################################
2072: sub revise_button {
2073: my $revise_phase = 'disp_basic';
2074: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
2075: my $newloc = '/adm/searchcat'.
2076: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
2077: '&cleargroupsort=1'.
2078: '&phase='.$revise_phase;
2079: my $result = qq{<input type="button" value="Revise search" name="revise"} .
2080: qq{ onClick="parent.location='$newloc';" /> };
2081: return $result;
2082: }
2083:
2084: ######################################################################
2085: ######################################################################
2086:
2087: =pod
2088:
2089: =item &run_search()
2090:
2091: Executes a search query by sending it the the other servers and putting the
2092: results into MySQL.
2093:
2094: =cut
2095:
2096: ######################################################################
2097: ######################################################################
2098: sub run_search {
2099: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
2100: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2101: my $connection = $r->connection;
2102: #
2103: # Print run_search header
2104: #
2105: $r->print(<<END);
2106: <html>
2107: <head><title>Search Status</title></head>
2108: $bodytag
2109: <form name="statusform" action="" method="post">
2110: <input type="hidden" name="Queue" value="" />
2111: END
2112: # Check to see if $pretty_string has more than one carriage return.
2113: # Assume \n s are following <br /> s and truncate the value.
2114: # (there is probably a better way)...
2115: my @Lines = split /<br \/>/,$pretty_string;
2116: if (@Lines > 2) {
2117: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
2118: }
2119: $r->print(&mt("Search: [_1]",$pretty_string));
2120: $r->rflush();
2121: #
2122: # Determine the servers we need to contact.
2123: my @Servers_to_contact;
2124: if (defined($serverlist)) {
2125: if (ref($serverlist) eq 'ARRAY') {
2126: @Servers_to_contact = @$serverlist;
2127: } else {
2128: @Servers_to_contact = ($serverlist);
2129: }
2130: } else {
2131: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
2132: }
2133: my %Server_status;
2134: #
2135: # Check on the mysql table we will use to store results.
2136: my $table =$ENV{'form.table'};
2137: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
2138: $r->print("Unable to determine table id to store search results in.".
2139: "The search has been aborted.</body></html>");
2140: return;
2141: }
2142: my $table_status = &Apache::lonmysql::check_table($table);
2143: if (! defined($table_status)) {
2144: $r->print("Unable to determine status of table.</body></html>");
2145: &Apache::lonnet::logthis("Bogus table id of $table for ".
2146: "$ENV{'user.name'} @ $ENV{'user.domain'}");
2147: &Apache::lonnet::logthis("lonmysql error = ".
2148: &Apache::lonmysql::get_error());
2149: return;
2150: }
2151: if (! $table_status) {
2152: &Apache::lonnet::logthis("lonmysql error = ".
2153: &Apache::lonmysql::get_error());
2154: &Apache::lonnet::logthis("lonmysql debug = ".
2155: &Apache::lonmysql::get_debug());
2156: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
2157: $r->print("The table id,$table, we tried to use is invalid.".
2158: "The search has been aborted.</body></html>");
2159: return;
2160: }
2161: ##
2162: ## Prepare for the big loop.
2163: my $hitcountsum;
2164: my $server;
2165: my $status;
2166: my $revise = &revise_button();
2167: $r->print(<<END);
2168: <table>
2169: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
2170: <tr>
2171: <td><input type="text" name="status" value="" size="30" /></td>
2172: <td><input type="text" name="count" value="" size="10" /></td>
2173: <td><input type="text" name="seconds" value="" size="8" /></td>
2174: <td>$revise</td>
2175: </tr>
2176: </table>
2177: </form>
2178: END
2179: $r->rflush();
2180: &reset_timing();
2181: &update_seconds($r);
2182: &update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
2183: while (&time_left() &&
2184: ((@Servers_to_contact) || keys(%Server_status))) {
2185: &update_seconds($r);
2186: #
2187: # Send out a search request
2188: if (@Servers_to_contact) {
2189: # Contact one server
2190: my $server = shift(@Servers_to_contact);
2191: &update_status($r,&mt('contacting [_1]',$server));
2192: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2193: $customshow,[$server]);
2194: ($server) = keys(%$reply);
2195: $Server_status{$server} = $reply->{$server};
2196: } else {
2197: # wait a sec. to give time for files to be written
2198: # This sleep statement is here instead of outside the else
2199: # block because we do not want to pause if we have servers
2200: # left to contact.
2201: if (scalar (keys(%Server_status))) {
2202: &update_status($r,
2203: &mt('waiting on [_1]',join(' ',keys(%Server_status))));
2204: }
2205: sleep(1);
2206: }
2207: #
2208: # Loop through the servers we have contacted but do not
2209: # have results from yet, looking for results.
2210: while (my ($server,$status) = each(%Server_status)) {
2211: last if ($connection->aborted());
2212: &update_seconds($r);
2213: if ($status eq 'con_lost') {
2214: delete ($Server_status{$server});
2215: next;
2216: }
2217: $status=~/^([\.\w]+)$/;
2218: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2219: if (-e $datafile && ! -e "$datafile.end") {
2220: &update_status($r,&mt('Receiving results from [_1]',$server));
2221: next;
2222: }
2223: last if ($connection->aborted());
2224: if (-e "$datafile.end") {
2225: &update_status($r,&mt('Reading results from [_1]',$server));
2226: if (-z "$datafile") {
2227: delete($Server_status{$server});
2228: next;
2229: }
2230: my $fh;
2231: if (!($fh=Apache::File->new($datafile))) {
2232: $r->print("Unable to open search results file for ".
2233: "server $server. Omitting from search");
2234: delete($Server_status{$server});
2235: next;
2236: }
2237: # Read in the whole file.
2238: while (my $result = <$fh>) {
2239: last if ($connection->aborted());
2240: #
2241: # Records are stored one per line
2242: chomp($result);
2243: next if (! $result);
2244: #
2245: # Parse the result.
2246: my %Fields = &parse_raw_result($result,$server);
2247: $Fields{'hostname'} = $server;
2248: #
2249: # Skip based on copyright
2250: next if (! ©right_check(\%Fields));
2251: #
2252: # Store the result in the mysql database
2253: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2254: if (! defined($result)) {
2255: $r->print(&Apache::lonmysql::get_error());
2256: }
2257: #
2258: $hitcountsum ++;
2259: &update_seconds($r);
2260: if ($hitcountsum % 50 == 0) {
2261: &update_count_status($r,$hitcountsum);
2262: }
2263: }
2264: $fh->close();
2265: # $server is only deleted if the results file has been
2266: # found and (successfully) opened. This may be a bad idea.
2267: delete($Server_status{$server});
2268: }
2269: last if ($connection->aborted());
2270: &update_count_status($r,$hitcountsum);
2271: }
2272: last if ($connection->aborted());
2273: &update_seconds($r);
2274: }
2275: &update_status($r,&mt('Search Complete [_1]',$server));
2276: &update_seconds($r);
2277: #
2278: &Apache::lonmysql::disconnect_from_db(); # This is unneccessary
2279: #
2280: # We have run out of time or run out of servers to talk to and
2281: # results to get, so let the client know the top frame needs to be
2282: # loaded from /adm/searchcat
2283: $r->print("</body></html>");
2284: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2285: $r->print("<script>".
2286: "window.location='/adm/searchcat?".
2287: "phase=sort&".
2288: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2289: "</script>");
2290: }
2291: return;
2292: }
2293:
2294: ######################################################################
2295: ######################################################################
2296:
2297: =pod
2298:
2299: =item &prev_next_buttons()
2300:
2301: Returns html for the previous and next buttons on the search results page.
2302:
2303: =cut
2304:
2305: ######################################################################
2306: ######################################################################
2307: sub prev_next_buttons {
2308: my ($current_min,$show,$total,$parms) = @_;
2309: return '' if ($show eq 'all'); # No links if you get them all at once.
2310: #
2311: # Create links
2312: my $prev_min = $current_min - $show;
2313: $prev_min = 1 if $prev_min < 1;
2314: my $prevlink =
2315: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">};
2316: #
2317: my $next_min = $current_min + $show;
2318: $next_min = $current_min if ($next_min > $total);
2319: my $nextlink =
2320: qq{<a href="/adm/searchcat?$parms&start=$next_min&show=$show">};
2321: my $reloadlink =
2322: qq{<a href="/adm/searchcat?$parms&start=$current_min&$show=$show">};
2323: #
2324: # Determine which parameters to pass
2325: my $String = '[_1]prev[_2] [_3]reload[_4] [_5]next[_6]';
2326: if ($prev_min == $current_min) {
2327: $String =~ s:\[_[12]\]::g;
2328: }
2329: if ($next_min == $current_min) {
2330: $String =~ s:\[_[56]\]::g;
2331: }
2332: my $links = &mt($String,
2333: $prevlink, '</a>',
2334: $reloadlink,'</a>',
2335: $nextlink, '</a>');
2336: return $links;
2337: }
2338:
2339: ######################################################################
2340: ######################################################################
2341:
2342: =pod
2343:
2344: =item &display_results()
2345:
2346: Prints the results out for selection and perusal.
2347:
2348: =cut
2349:
2350: ######################################################################
2351: ######################################################################
2352: sub display_results {
2353: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2354: my $connection = $r->connection;
2355: $r->print(&search_results_header($importbutton,$closebutton));
2356: ##
2357: ## Set viewing function
2358: ##
2359: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2360: if (!defined($viewfunction)) {
2361: $r->print("Internal Error - Bad view selected.\n");
2362: $r->rflush();
2363: return;
2364: }
2365: ##
2366: ## $checkbox_num is a count of the number of checkboxes output on the
2367: ## page this is used only during catalogmode=groupsearch.
2368: my $checkbox_num = 0;
2369: ##
2370: ## Get the catalog controls setup
2371: ##
2372: my $action = "/adm/searchcat?phase=results";
2373: ##
2374: ## Deal with groupsearch by opening the groupsearch db file.
2375: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2376: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2377: &GDBM_WRCREAT(),0640)) {
2378: $r->print('Unable to store import results.</form></body></html>');
2379: $r->rflush();
2380: return;
2381: }
2382: }
2383: ##
2384: ## Prepare the table for querying
2385: my $table = $ENV{'form.table'};
2386: return if (! &ensure_db_and_table($r,$table));
2387: ##
2388: ## Get the number of results
2389: my $total_results = &Apache::lonmysql::number_of_rows($table);
2390: if (! defined($total_results)) {
2391: $r->print("A MySQL error has occurred.</form></body></html>");
2392: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2393: " of rows in table ".$table);
2394: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2395: return;
2396: }
2397: ##
2398: ## Determine how many results we need to get
2399: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2400: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2401: my $min = $ENV{'form.start'};
2402: my $max;
2403: if ($ENV{'form.show'} eq 'all') {
2404: $max = $total_results ;
2405: } else {
2406: $max = $min + $ENV{'form.show'} - 1;
2407: $max = $total_results if ($max > $total_results);
2408: }
2409: ##
2410: ## Output links (if necessary) for 'prev' and 'next' pages.
2411: $r->print
2412: ('<center>'.
2413: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2414: "table=".$ENV{'form.table'}.
2415: "&phase=results".
2416: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2417: ."</center>\n"
2418: );
2419: if ($total_results == 0) {
2420: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
2421: '<h3>'.&mt('There are currently no results').'.</h3>'.
2422: "</form></body></html>");
2423: return;
2424: } else {
2425: $r->print
2426: ("<center>Results $min to $max out of $total_results</center>\n");
2427: }
2428: ##
2429: ## Get results from MySQL table
2430: my @Results = &Apache::lonmysql::get_rows($table,
2431: 'id>='.$min.' AND id<='.$max);
2432: ##
2433: ## Loop through the results and output them.
2434: foreach my $row (@Results) {
2435: if ($connection->aborted()) {
2436: &cleanup();
2437: return;
2438: }
2439: my %Fields = %{&parse_row(@$row)};
2440: my $output="<p>\n";
2441: if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
2442: $Fields{'title'} = 'Untitled';
2443: }
2444: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2445: $Fields{'id'},$checkbox_num++);
2446: # Render the result into html
2447: $output.= &$viewfunction($prefix,%Fields);
2448: # Print them out as they come in.
2449: $r->print($output);
2450: $r->rflush();
2451: }
2452: if (@Results < 1) {
2453: $r->print(&mt("There were no results matching your query"));
2454: } else {
2455: $r->print
2456: ('<center>'.
2457: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2458: "table=".$ENV{'form.table'}.
2459: "&phase=results".
2460: "&persistent_db_id=".
2461: $ENV{'form.persistent_db_id'})
2462: ."</center>\n"
2463: );
2464: }
2465: $r->print("</form></body></html>");
2466: $r->rflush();
2467: untie %groupsearch_db if (tied(%groupsearch_db));
2468: return;
2469: }
2470:
2471: ######################################################################
2472: ######################################################################
2473:
2474: =pod
2475:
2476: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2477:
2478: Returns html needed for the various catalog modes. Gets inputs from
2479: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2480:
2481: =cut
2482:
2483: ######################################################################
2484: ######################################################################
2485: sub catalogmode_output {
2486: my $output = '';
2487: my ($title,$url,$fnum,$checkbox_num) = @_;
2488: if ($ENV{'form.catalogmode'} eq 'interactive') {
2489: $title=~ s/\'/\\\'/g;
2490: if ($ENV{'form.catalogmode'} eq 'interactive') {
2491: $output.=<<END
2492: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2493: onClick="javascript:select_data('$title','$url')">
2494: </font>
2495: END
2496: }
2497: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2498: $groupsearch_db{"pre_${fnum}_link"}=$url;
2499: $groupsearch_db{"pre_${fnum}_title"}=$title;
2500: $output.=<<END;
2501: <font size='-1'>
2502: <input type="checkbox" name="returnvalues" value="SELECT"
2503: onClick="javascript:queue($checkbox_num,$fnum)" />
2504: </font>
2505: END
2506: }
2507: return $output;
2508: }
2509: ######################################################################
2510: ######################################################################
2511:
2512: =pod
2513:
2514: =item &parse_row()
2515:
2516: Parse a row returned from the database.
2517:
2518: =cut
2519:
2520: ######################################################################
2521: ######################################################################
2522: sub parse_row {
2523: my @Row = @_;
2524: my %Fields;
2525: if (! scalar(@Datatypes)) {
2526: &set_up_table_structure();
2527: }
2528: for (my $i=0;$i<=$#Row;$i++) {
2529: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2530: }
2531: $Fields{'language'} =
2532: &Apache::loncommon::languagedescription($Fields{'language'});
2533: $Fields{'copyrighttag'} =
2534: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2535: $Fields{'mimetag'} =
2536: &Apache::loncommon::filedescription($Fields{'mime'});
2537: return \%Fields;
2538: }
2539:
2540: ###########################################################
2541: ###########################################################
2542:
2543: =pod
2544:
2545: =item &parse_raw_result()
2546:
2547: Takes a line from the file of results and parse it. Returns a hash
2548: with keys according to column labels
2549:
2550: In addition, the following tags are set by calling the appropriate
2551: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2552:
2553: The 'title' field is set to "Untitled" if the title field is blank.
2554:
2555: 'abstract' and 'keywords' are truncated to 200 characters.
2556:
2557: =cut
2558:
2559: ###########################################################
2560: ###########################################################
2561: sub parse_raw_result {
2562: my ($result,$hostname) = @_;
2563: # conclude from self to others regarding fields
2564: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2565: (map {
2566: &Apache::lonnet::unescape($_);
2567: } (split(/\,/,$result)) );
2568: return %Fields;
2569: }
2570:
2571: ###########################################################
2572: ###########################################################
2573:
2574: =pod
2575:
2576: =item &handle_custom_fields()
2577:
2578: =cut
2579:
2580: ###########################################################
2581: ###########################################################
2582: sub handle_custom_fields {
2583: my @results = @{shift()};
2584: my $customshow='';
2585: my $extrashow='';
2586: my @customfields;
2587: if ($ENV{'form.customshow'}) {
2588: $customshow=$ENV{'form.customshow'};
2589: $customshow=~s/[^\w\s]//g;
2590: my @fields=map {
2591: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2592: } split(/\s+/,$customshow);
2593: @customfields=split(/\s+/,$customshow);
2594: if ($customshow) {
2595: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2596: }
2597: }
2598: my $customdata='';
2599: my %customhash;
2600: foreach my $result (@results) {
2601: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2602: my $tmp=$result;
2603: $tmp=~s/^custom\=//;
2604: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2605: } split(/\,/,$tmp);
2606: $customhash{$k}=$v;
2607: }
2608: }
2609: return ($extrashow,\@customfields,\%customhash);
2610: }
2611:
2612: ######################################################################
2613: ######################################################################
2614:
2615: =pod
2616:
2617: =item &search_results_header()
2618:
2619: Output the proper html headers and javascript code to deal with different
2620: calling modes.
2621:
2622: Takes most inputs directly from %ENV, except $mode.
2623:
2624: =over 4
2625:
2626: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2627:
2628: =back
2629:
2630: The following environment variables are checked:
2631:
2632: =over 4
2633:
2634: =item 'form.catalogmode'
2635:
2636: Checked for 'interactive' and 'groupsearch'.
2637:
2638: =item 'form.mode'
2639:
2640: Checked for existance & 'edit' mode.
2641:
2642: =item 'form.form'
2643:
2644: Contains the name of the form that has the input fields to set
2645:
2646: =item 'form.element'
2647:
2648: the name of the input field to put the URL into
2649:
2650: =item 'form.titleelement'
2651:
2652: the name of the input field to put the title into
2653:
2654: =back
2655:
2656: =cut
2657:
2658: ######################################################################
2659: ######################################################################
2660: sub search_results_header {
2661: my ($importbutton,$closebutton) = @_;
2662: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2663: my $result = '';
2664: # output beginning of search page
2665: # conditional output of script functions dependent on the mode in
2666: # which the search was invoked
2667: if ($ENV{'form.catalogmode'} eq 'interactive'){
2668: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2669: $result.=<<SCRIPT;
2670: <script type="text/javascript">
2671: function select_data(title,url) {
2672: changeTitle(title);
2673: changeURL(url);
2674: parent.close();
2675: }
2676: function changeTitle(val) {
2677: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2678: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2679: }
2680: }
2681: function changeURL(val) {
2682: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2683: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2684: }
2685: }
2686: </script>
2687: SCRIPT
2688: } elsif ($ENV{'form.mode'} eq 'edit') {
2689: my $form = $ENV{'form.form'};
2690: my $element = $ENV{'form.element'};
2691: my $titleelement = $ENV{'form.titleelement'};
2692: my $changetitle;
2693: if (!$titleelement) {
2694: $changetitle='function changeTitle(val) {}';
2695: } else {
2696: $changetitle=<<END;
2697: function changeTitle(val) {
2698: if (parent.targetwin.document) {
2699: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2700: } else {
2701: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2702: alert("Unable to transfer data to "+url);
2703: }
2704: }
2705: END
2706: }
2707:
2708: $result.=<<SCRIPT;
2709: <script type="text/javascript">
2710: function select_data(title,url) {
2711: changeURL(url);
2712: changeTitle(title);
2713: parent.close();
2714: }
2715: $changetitle
2716: function changeURL(val) {
2717: if (parent.targetwin.document) {
2718: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2719: } else {
2720: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2721: alert("Unable to transfer data to "+url);
2722: }
2723: }
2724: </script>
2725: SCRIPT
2726: }
2727: }
2728: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2729: <script type="text/javascript">
2730: function queue(checkbox_num,val) {
2731: if (document.forms.results.returnvalues.length != "undefined" &&
2732: typeof(document.forms.results.returnvalues.length) == "number") {
2733: if (document.forms.results.returnvalues[checkbox_num].checked) {
2734: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2735: } else {
2736: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2737: }
2738: } else {
2739: if (document.forms.results.returnvalues.checked) {
2740: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2741: } else {
2742: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2743: }
2744: }
2745: }
2746: function select_group() {
2747: parent.window.location=
2748: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2749: parent.statusframe.document.forms.statusform.elements.Queue.value;
2750: }
2751: </script>
2752: SCRIPT
2753: $result.=<<END;
2754: </head>
2755: $bodytag
2756: <form name="results" method="post" action="" >
2757: <input type="hidden" name="Queue" value="" />
2758: $importbutton
2759: END
2760: return $result;
2761: }
2762:
2763: ######################################################################
2764: ######################################################################
2765: sub search_status_header {
2766: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2767: return <<ENDSTATUS;
2768: <html><head><title>Search Status</title></head>
2769: $bodytag
2770: <h3>Search Status</h3>
2771: Sending search request to LON-CAPA servers.<br />
2772: ENDSTATUS
2773: }
2774:
2775: sub results_link {
2776: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2777: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2778: my $results_link = $basic_link."&phase=results".
2779: "&pause=1"."&start=1";
2780: return $results_link;
2781: }
2782:
2783: ######################################################################
2784: ######################################################################
2785: sub print_frames_interface {
2786: my $r = shift;
2787: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2788: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2789: my $run_search_link = $basic_link."&phase=run_search";
2790: my $results_link = &results_link();
2791: my $result = <<"ENDFRAMES";
2792: <html>
2793: <head>
2794: <script>
2795: var targetwin = opener;
2796: var queue = '';
2797: </script>
2798: <title>LON-CAPA Digital Library Search Results</title>
2799: </head>
2800: <frameset rows="150,*">
2801: <frame name="statusframe" src="$run_search_link">
2802: <frame name="resultsframe" src="$results_link">
2803: </frameset>
2804: </html>
2805: ENDFRAMES
2806:
2807: $r->print($result);
2808: return;
2809: }
2810:
2811: ######################################################################
2812: ######################################################################
2813:
2814: =pod
2815:
2816: =item Metadata Viewing Functions
2817:
2818: Output is a HTML-ified string.
2819:
2820: Input arguments are title, author, subject, url, keywords, version,
2821: notes, short abstract, mime, language, creation date,
2822: last revision date, owner, copyright, hostname, and
2823: extra custom metadata to show.
2824:
2825: =over 4
2826:
2827: =item &detailed_citation_view()
2828:
2829: =cut
2830:
2831: ######################################################################
2832: ######################################################################
2833: sub detailed_citation_view {
2834: my ($prefix,%values) = @_;
2835: my $icon=
2836: my $result;
2837: $result .= '<b>'.$prefix.
2838: '<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.
2839: '<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
2840: 'target="search_preview">'.$values{'title'}."</a></b>\n";
2841: $result .= "<p>\n";
2842: $result .= '<b>'.$values{'author'}.'</b>,'.
2843: ' <i>'.$values{'owner'}.'</i><br />';
2844: foreach my $field
2845: (
2846: { name=>'subject',
2847: translate => '<b>Subject:</b> [_1]',},
2848: { name=>'keywords',
2849: translate => '<b>Keywords:</b> [_1]',},
2850: { name=>'notes',
2851: translate => '<b>Notes:</b> [_1]',},
2852: { name=>'mimetag',
2853: translate => '<b>MIME Type:</b> [_1]',},
2854: { name=>'standards',
2855: translate => '<b>Standards:</b>[_1]',},
2856: { name=>'copyrighttag',
2857: translate => '<b>Copyright/Distribution:</b> [_1]',},
2858: { name=>'stdno',
2859: translate => '<b>Number of Students:</b> [_1]',},
2860: { name=>'avetries',
2861: translate => '<b>Average Tries:</b> [_1]',},
2862: { name=>'disc',
2863: translate => '<b>Degree of Discrimination:</b> [_1]',},
2864: { name=>'difficulty',
2865: translate => '<b>Degree of Difficulty:</b> [_1]',},
2866: { name=>'clear',
2867: translate => '<b>Clear:</b> [_1]',},
2868: { name=>'depth',
2869: translate => '<b>Depth:</b> [_1]',},
2870: { name=>'helpful',
2871: translate => '<b>Helpful:</b> [_1]',},
2872: { name=>'correct',
2873: translate => '<b>Correcy:</b> [_1]',},
2874: { name=>'technical',
2875: translate => '<b>Technical:</b> [_1]',},
2876: ) {
2877: $result.= &mt($field->{'translate'},$values{$field->{'name'}}).
2878: "<br />\n";
2879: }
2880: $result .= "</p>".$values{'extrashow'}.
2881: '<p>'.$values{'shortabstract'}.'</p>';
2882: $result .= '<hr align="left" width="200" noshade />'."\n";
2883: return $result;
2884: }
2885:
2886: ######################################################################
2887: ######################################################################
2888:
2889: sub has_stat_data {
2890: my ($values) = @_;
2891: if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
2892: (defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
2893: (defined($values->{'disc'}) && $values->{'disc'} ne '') ||
2894: (defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
2895: (defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
2896: return 1;
2897: }
2898: return 0;
2899: }
2900:
2901: sub statfields {
2902: return ('count','stdno','disc','avetries','difficulty');
2903: }
2904:
2905: sub has_eval_data {
2906: my ($values) = @_;
2907: if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
2908: (defined($values->{'technical'}) && $values->{'technical'} ne '') ||
2909: (defined($values->{'correct'}) && $values->{'correct'} ne '') ||
2910: (defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
2911: (defined($values->{'depth'}) && $values->{'depth'} ne '')) {
2912: return 1;
2913: }
2914: return 0;
2915: }
2916:
2917: sub evalfields {
2918: return ('clear','technical','correct','helpful','depth');
2919: }
2920:
2921: ######################################################################
2922: ######################################################################
2923:
2924: =pod
2925:
2926: =item &summary_view()
2927:
2928: =cut
2929: ######################################################################
2930: ######################################################################
2931: sub summary_view {
2932: my ($prefix,%values) = @_;
2933: my $icon=&Apache::loncommon::icon($values{'url'});
2934: my $result=<<END;
2935: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2936: target='search_preview'>$values{'author'}</a><br />
2937: $values{'title'}<br />
2938: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2939: $values{'copyrighttag'}<br />
2940: $values{'extrashow'}
2941: </p>
2942: <hr align='left' width='200' noshade />
2943: END
2944: return $result;
2945: }
2946:
2947: ######################################################################
2948: ######################################################################
2949:
2950: =pod
2951:
2952: =item &compact_view()
2953:
2954: =cut
2955:
2956: ######################################################################
2957: ######################################################################
2958: sub compact_view {
2959: my ($prefix,%values) = @_;
2960: my $icon=&Apache::loncommon::icon($values{'url'});
2961: my $result=<<END;
2962: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2963: $values{'title'}</a>
2964: <b>$values{'author'}</b><br />
2965: END
2966: return $result;
2967: }
2968:
2969:
2970: ######################################################################
2971: ######################################################################
2972:
2973: =pod
2974:
2975: =item &fielded_format_view()
2976:
2977: =cut
2978:
2979: ######################################################################
2980: ######################################################################
2981: sub fielded_format_view {
2982: my ($prefix,%values) = @_;
2983: my $icon=&Apache::loncommon::icon($values{'url'});
2984: my %Translated = &Apache::lonmeta::fieldnames();
2985: my $result=<<END;
2986: $prefix <img src="$icon" />
2987: <dl>
2988: <dt>URL:</dt>
2989: <dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2990: target='search_preview'>$values{'url'}</a></dd>
2991: END
2992: foreach my $field ('title','author','subject','keywords','notes',
2993: 'mimetag','language','creationdate','lastrevisiondate',
2994: 'owner','copyrighttag','hostname','abstract') {
2995: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
2996: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
2997: }
2998: if (&has_stat_data(\%values)) {
2999: foreach my $field (&statfields()) {
3000: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3001: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3002: }
3003: }
3004: if (&has_eval_data(\%values)) {
3005: foreach my $field (&evalfields()) {
3006: $result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
3007: (' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
3008: }
3009: }
3010: $result .= "</dl>\n";
3011: $result .= $values{'extrashow'};
3012: $result .= '<hr align="left" width="200" noshade />'."\n";
3013: return $result;
3014: }
3015:
3016: ######################################################################
3017: ######################################################################
3018:
3019: =pod
3020:
3021: =item &xml_sgml_view()
3022:
3023: =back
3024:
3025: =cut
3026:
3027: ######################################################################
3028: ######################################################################
3029: sub xml_sgml_view {
3030: my ($prefix,%values) = @_;
3031: my $xml = '<LonCapaResource>'."\n";
3032: # The usual suspects
3033: foreach my $field ('url','title','author','subject','keywords','notes') {
3034: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3035: }
3036: #
3037: $xml .= "<mimeInfo>\n";
3038: foreach my $field ('mime','mimetag') {
3039: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3040: }
3041: $xml .= "</mimeInfo>\n";
3042: #
3043: $xml .= "<languageInfo>\n";
3044: foreach my $field ('language','languagetag') {
3045: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3046: }
3047: $xml .= "</languageInfo>\n";
3048: #
3049: foreach my $field ('creationdate','lastrevisiondate','owner') {
3050: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3051: }
3052: #
3053: $xml .= "<copyrightInfo>\n";
3054: foreach my $field ('copyright','copyrighttag') {
3055: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3056: }
3057: $xml .= "</copyrightInfo>\n";
3058: $xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
3059: "\n";
3060: $xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
3061: #
3062: if (&has_stat_data(\%values)){
3063: $xml .= "<problemstatistics>\n";
3064: foreach my $field (&statfields()) {
3065: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3066: }
3067: $xml .= "</problemstatistics>\n";
3068: }
3069: #
3070: if (&has_eval_data(\%values)) {
3071: $xml .= "<evaluation>\n";
3072: foreach my $field (&evalfields) {
3073: $xml .= qq{<$field>$values{$field}</$field>}."\n";
3074: }
3075: $xml .= "</evaluation>\n";
3076: }
3077: #
3078: $xml .= "</LonCapaResource>\n";
3079: $xml = &HTML::Entities::encode($xml,'<>&');
3080: my $result=<<END;
3081: $prefix
3082: <pre>
3083: $xml
3084: </pre>
3085: $values{'extrashow'}
3086: <hr align='left' width='200' noshade />
3087: END
3088: return $result;
3089: }
3090:
3091: ######################################################################
3092: ######################################################################
3093:
3094: =pod
3095:
3096: =item &filled() see if field is filled.
3097:
3098: =cut
3099:
3100: ######################################################################
3101: ######################################################################
3102: sub filled {
3103: my ($field)=@_;
3104: if ($field=~/\S/ && $field ne 'any') {
3105: return 1;
3106: } else {
3107: return 0;
3108: }
3109: }
3110:
3111: ######################################################################
3112: ######################################################################
3113:
3114: =pod
3115:
3116: =item &output_blank_field_error()
3117:
3118: Output a complete page that indicates the user has not filled in enough
3119: information to do a search.
3120:
3121: Inputs: $r (Apache request handle), $closebutton, $parms.
3122:
3123: Returns: nothing
3124:
3125: $parms is extra information to include in the 'Revise search request' link.
3126:
3127: =cut
3128:
3129: ######################################################################
3130: ######################################################################
3131: sub output_blank_field_error {
3132: my ($r,$closebutton,$parms,$hidden_fields)=@_;
3133: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3134: # make query information persistent to allow for subsequent revision
3135: $r->print(<<BEGINNING);
3136: <html>
3137: <head>
3138: <title>The LearningOnline Network with CAPA</title>
3139: BEGINNING
3140: $r->print(<<RESULTS);
3141: </head>
3142: $bodytag
3143: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3144: <h1>Search Catalog</h1>
3145: <form method="post" action="/adm/searchcat">
3146: $hidden_fields
3147: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
3148: >Revise search request</a>
3149: $closebutton
3150: <hr />
3151: <h3>Unactionable search query.</h3>
3152: <p>
3153: You did not fill in enough information for the search to be started.
3154: You need to fill in relevant fields on the search page in order
3155: for a query to be processed.
3156: </p>
3157: </body>
3158: </html>
3159: RESULTS
3160: }
3161:
3162: ######################################################################
3163: ######################################################################
3164:
3165: =pod
3166:
3167: =item &output_date_error()
3168:
3169: Output a full html page with an error message.
3170:
3171: Inputs:
3172:
3173: $r, the request pointer.
3174: $message, the error message for the user.
3175: $closebutton, the specialized close button needed for groupsearch.
3176:
3177: =cut
3178:
3179: ######################################################################
3180: ######################################################################
3181: sub output_date_error {
3182: my ($r,$message,$closebutton,$hidden_fields)=@_;
3183: # make query information persistent to allow for subsequent revision
3184: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
3185: $r->print(<<RESULTS);
3186: <html>
3187: <head>
3188: <title>The LearningOnline Network with CAPA</title>
3189: </head>
3190: $bodytag
3191: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
3192: <h1>Search Catalog</h1>
3193: <form method="post" action="/adm/searchcat">
3194: $hidden_fields
3195: <input type='button' value='Revise search request'
3196: onClick='this.form.submit();' />
3197: $closebutton
3198: <hr />
3199: <h3>Error</h3>
3200: <p>
3201: $message
3202: </p>
3203: </body>
3204: </html>
3205: RESULTS
3206: }
3207:
3208: ######################################################################
3209: ######################################################################
3210:
3211: =pod
3212:
3213: =item &start_fresh_session()
3214:
3215: Cleans the global %groupsearch_db by removing all fields which begin with
3216: 'pre_' or 'store'.
3217:
3218: =cut
3219:
3220: ######################################################################
3221: ######################################################################
3222: sub start_fresh_session {
3223: delete $groupsearch_db{'mode_catalog'};
3224: foreach (keys %groupsearch_db) {
3225: if ($_ =~ /^pre_/) {
3226: delete $groupsearch_db{$_};
3227: }
3228: if ($_ =~ /^store/) {
3229: delete $groupsearch_db{$_};
3230: }
3231: }
3232: }
3233:
3234: 1;
3235:
3236: sub cleanup {
3237: if (tied(%groupsearch_db)) {
3238: unless (untie(%groupsearch_db)) {
3239: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
3240: }
3241: }
3242: &untiehash();
3243: &Apache::lonmysql::disconnect_from_db();
3244: }
3245:
3246: __END__
3247:
3248: =pod
3249:
3250: =back
3251:
3252: =cut
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