1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.207 2004/04/19 13:51:36 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:
78: ######################################################################
79: ######################################################################
80: ##
81: ## Global variables
82: ##
83: ######################################################################
84: ######################################################################
85: my %groupsearch_db; # Database hash used to save values for the
86: # groupsearch RAT interface.
87: my %persistent_db; # gdbm hash which holds data which is supposed to
88: # persist across calls to lonsearchcat.pm
89:
90: # The different view modes and associated functions
91:
92: my %Views = ("detailed" => \&detailed_citation_view,
93: "summary" => \&summary_view,
94: "fielded" => \&fielded_format_view,
95: "xml" => \&xml_sgml_view,
96: "compact" => \&compact_view);
97:
98: ######################################################################
99: ######################################################################
100: sub handler {
101: my $r = shift;
102: # &set_defaults();
103: #
104: # set form defaults
105: #
106: my $hidden_fields;# Hold all the hidden fields used to keep track
107: # of the search system state
108: my $importbutton; # button to take the selected results and go to group
109: # sorting
110: my $diropendb; # The full path to the (temporary) search database file.
111: # This is set and used in &handler() and is also used in
112: # &output_results().
113: my $bodytag; # LON-CAPA standard body tag, gotten from
114: # &Apache::lonnet::bodytag.
115: # No title, no table, just a <body> tag.
116:
117: my $loaderror=&Apache::lonnet::overloaderror($r);
118: if ($loaderror) { return $loaderror; }
119:
120: my $closebutton; # button that closes the search window
121: # This button is different for the RAT compared to
122: # normal invocation.
123: #
124: &Apache::loncommon::content_type($r,'text/html');
125: $r->send_http_header;
126: return OK if $r->header_only;
127: ##
128: ## Prevent caching of the search interface window. Hopefully this means
129: ## we will get the launch=1 passed in a little more.
130: &Apache::loncommon::no_cache($r);
131: ##
132: ## Pick up form fields passed in the links.
133: ##
134: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
135: ['catalogmode','launch','acts','mode','form','element','pause',
136: 'phase','persistent_db_id','table','start','show',
137: 'cleargroupsort','titleelement']);
138: ##
139: ## The following is a trick - we wait a few seconds if asked to so
140: ## the daemon running the search can get ahead of the daemon
141: ## printing the results. We only need (theoretically) to do
142: ## this once, so the pause indicator is deleted
143: ##
144: if (exists($ENV{'form.pause'})) {
145: sleep(1);
146: delete($ENV{'form.pause'});
147: }
148: ##
149: ## Initialize global variables
150: ##
151: my $domain = $r->dir_config('lonDefDomain');
152: $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
153: #
154: # set the name of the persistent database
155: # $ENV{'form.persistent_db_id'} can only have digits in it.
156: if (! exists($ENV{'form.persistent_db_id'}) ||
157: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
158: ($ENV{'form.launch'} eq '1')) {
159: $ENV{'form.persistent_db_id'} = time;
160: }
161: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
162: my $persistent_db_file = "/home/httpd/perl/tmp/".
163: &Apache::lonnet::escape($domain).
164: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
165: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
166: ##
167: if (! &get_persistent_form_data($persistent_db_file)) {
168: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
169: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
170: "from $persistent_db_file");
171: $r->print(<<END);
172: <html>
173: <head><title>LON-CAPA Search Error</title></head>
174: $bodytag
175: We were unable to retrieve data describing your search. This is a serious
176: error and has been logged. Please alert your LON-CAPA administrator.
177: </body>
178: </html>
179: END
180: return OK;
181: }
182: }
183: ##
184: ## Clear out old values from groupsearch database
185: ##
186: untie %groupsearch_db if (tied(%groupsearch_db));
187: if (($ENV{'form.cleargroupsort'} eq '1') ||
188: (($ENV{'form.launch'} eq '1') &&
189: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
190: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
191: &start_fresh_session();
192: untie %groupsearch_db;
193: delete($ENV{'form.cleargroupsort'});
194: } else {
195: # This is a stupid error to give to the user.
196: # It really tells them nothing.
197: $r->print('<html><head></head>'.$bodytag.
198: 'Unable to tie hash to db file</body></html>');
199: return OK;
200: }
201: }
202: ##
203: ## Configure hidden fields
204: ##
205: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
206: $ENV{'form.persistent_db_id'}.'" />'."\n";
207: if (exists($ENV{'form.catalogmode'})) {
208: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
209: $ENV{'form.catalogmode'}.'" />'."\n";
210: }
211: if (exists($ENV{'form.form'})) {
212: $hidden_fields .= '<input type="hidden" name="form" value="'.
213: $ENV{'form.form'}.'" />'."\n";
214: }
215: if (exists($ENV{'form.element'})) {
216: $hidden_fields .= '<input type="hidden" name="element" value="'.
217: $ENV{'form.element'}.'" />'."\n";
218: }
219: if (exists($ENV{'form.titleelement'})) {
220: $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
221: $ENV{'form.titleelement'}.'" />'."\n";
222: }
223: if (exists($ENV{'form.mode'})) {
224: $hidden_fields .= '<input type="hidden" name="mode" value="'.
225: $ENV{'form.mode'}.'" />'."\n";
226: }
227: ##
228: ## Configure dynamic components of interface
229: ##
230: if ($ENV{'form.catalogmode'} eq 'interactive') {
231: $closebutton="<input type='button' name='close' value='CLOSE' ";
232: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
233: $closebutton .="onClick='parent.close()'";
234: } else {
235: $closebutton .="onClick='self.close()'";
236: }
237: $closebutton .=">\n";
238: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
239: $closebutton="<input type='button' name='close' value='CLOSE' ";
240: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
241: $closebutton .="onClick='parent.close()'";
242: } else {
243: $closebutton .="onClick='self.close()'";
244: }
245: $closebutton .= ">";
246: $importbutton=<<END;
247: <input type='button' name='import' value='IMPORT'
248: onClick='javascript:select_group()'>
249: END
250: } else {
251: $closebutton = '';
252: $importbutton = '';
253: }
254: ##
255: ## Sanity checks on form elements
256: ##
257: if (!defined($ENV{'form.viewselect'})) {
258: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
259: ($ENV{'form.catalogmode'} eq 'interactive')) {
260: $ENV{'form.viewselect'} ="Compact View";
261: } else {
262: $ENV{'form.viewselect'} ="Detailed Citation View";
263: }
264: }
265: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
266: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
267: ##
268: ## Switch on the phase
269: ##
270: if ($ENV{'form.phase'} eq 'disp_basic') {
271: &print_basic_search_form($r,$closebutton,$hidden_fields);
272: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
273: &print_advanced_search_form($r,$closebutton,$hidden_fields);
274: } elsif ($ENV{'form.phase'} eq 'results') {
275: &display_results($r,$importbutton,$closebutton,$diropendb);
276: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
277: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
278: &get_persistent_data($persistent_db_file,
279: ['query','customquery','customshow',
280: 'libraries','pretty_string']);
281: if ($ENV{'form.phase'} eq 'sort') {
282: &print_sort_form($r,$pretty_string);
283: } elsif ($ENV{'form.phase'} eq 'run_search') {
284: &run_search($r,$query,$customquery,$customshow,
285: $libraries,$pretty_string);
286: }
287: } elsif ($ENV{'form.phase'} eq 'course_search') {
288: &course_search($r);
289: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
290: ($ENV{'form.phase'} eq 'adv_search')) {
291: $ENV{'form.searchmode'} = 'basic';
292: if ($ENV{'form.phase'} eq 'adv_search') {
293: $ENV{'form.searchmode'} = 'advanced';
294: }
295: # Set up table
296: if (! defined(&create_results_table())) {
297: my $errorstring=&Apache::lonmysql::get_error();
298: $r->print(<<END);
299: <html><head><title>Search Error</title></head>
300: $bodytag
301: Unable to create table in which to store search results.
302: The search has been aborted.
303: <br />$errorstring
304: </body>
305: </html>
306: END
307: return OK;
308: }
309: delete($ENV{'form.launch'});
310: if (! &make_form_data_persistent($r,$persistent_db_file)) {
311: $r->print(<<END);
312: <html><head><title>Search Error</title></head>
313: $bodytag
314: Unable to properly store search information. The search has been aborted.
315: </body>
316: </html>
317: END
318: return OK;
319: }
320: #
321: # We are running a search
322: my ($query,$customquery,$customshow,$libraries) =
323: (undef,undef,undef,undef);
324: my $pretty_string;
325: if ($ENV{'form.phase'} eq 'basic_search') {
326: ($query,$pretty_string,$libraries) =
327: &parse_basic_search($r,$closebutton,$hidden_fields);
328: } else { # Advanced search
329: ($query,$customquery,$customshow,$libraries,$pretty_string)
330: = &parse_advanced_search($r,$closebutton,$hidden_fields);
331: return OK if (! defined($query));
332: }
333: &make_persistent({ query => $query,
334: customquery => $customquery,
335: customshow => $customshow,
336: libraries => $libraries,
337: pretty_string => $pretty_string },
338: $persistent_db_file);
339: ##
340: ## Print out the frames interface
341: ##
342: &print_frames_interface($r);
343: }
344: return OK;
345: }
346:
347: ######################################################################
348: ######################################################################
349: ##
350: ## Course Search
351: ##
352: ######################################################################
353: ######################################################################
354: { # Scope the course search to avoid global variables
355: #
356: # Variables For course search
357: my %alreadyseen;
358: my %hash;
359: my $totalfound;
360:
361: sub course_search {
362: my $r=shift;
363: my $bodytag=&Apache::loncommon::bodytag('Course Search').
364: &Apache::loncommon::help_open_bug('Searching');
365: my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
366: my $search_string = $ENV{'form.courseexp'};
367: my @New_Words;
368: if ($ENV{'form.crsrelated'}) {
369: ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
370: if (@New_Words) {
371: $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
372: } else {
373: $pretty_search_string .= ' '.&mt('with no related words').".";
374: }
375: }
376: my $fulltext=$ENV{'form.crsfulltext'};
377: my @allwords=($search_string,@New_Words);
378: $totalfound=0;
379: $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
380: $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
381: $r->rflush();
382: # ======================================================= Go through the course
383: undef %alreadyseen;
384: %alreadyseen=();
385: my $c=$r->connection;
386: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
387: &GDBM_READER(),0640)) {
388: foreach (keys %hash) {
389: if ($c->aborted()) { last; }
390: if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
391: &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
392: @allwords);
393: }
394: }
395: untie(%hash);
396: }
397: unless ($totalfound) {
398: $r->print('<p>'.&mt('No resources found').'.</p>');
399: }
400: # =================================================== Done going through course
401: $r->print('</body></html>');
402: }
403:
404: # =============================== This pulls up a resource and its dependencies
405:
406: sub checkonthis {
407: my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
408: $alreadyseen{$url}=1;
409: $r->rflush();
410: my $result=&Apache::lonnet::metadata($url,'title').' '.
411: &Apache::lonnet::metadata($url,'subject').' '.
412: &Apache::lonnet::metadata($url,'abstract').' '.
413: &Apache::lonnet::metadata($url,'keywords');
414: if (($url) && ($fulltext)) {
415: $result.=&Apache::lonnet::ssi_body($url);
416: }
417: $result=~s/\s+/ /gs;
418: my $applies=0;
419: foreach (@allwords) {
420: if ($_=~/\w/) {
421: if ($result=~/$_/si) {
422: $applies++;
423: }
424: }
425: }
426: # Does this resource apply?
427: if ($applies) {
428: $r->print('<br />');
429: for (my $i=0;$i<=$level*5;$i++) {
430: $r->print(' ');
431: }
432: $r->print('<a href="'.$url.'" target="cat">'.
433: ($title?$title:$url).'</a><br />');
434: $totalfound++;
435: } elsif ($fulltext) {
436: $r->print(' .');
437: }
438: $r->rflush();
439: # Check also the dependencies of this one
440: my $dependencies=
441: &Apache::lonnet::metadata($url,'dependencies');
442: foreach (split(/\,/,$dependencies)) {
443: if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
444: &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
445: }
446: }
447: }
448:
449: sub untiehash {
450: if (tied(%hash)) {
451: untie(%hash);
452: }
453: }
454:
455: } # End of course search scoping
456:
457: sub search_html_header {
458: my $Str = <<ENDHEADER;
459: <html>
460: <head>
461: <title>The LearningOnline Network with CAPA</title>
462: <script type="text/javascript">
463: function openhelp(val) {
464: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
465: 'scrollbars=1,width=600,height=300');
466: openhelpwin.focus();
467: }
468: </script>
469: </head>
470: ENDHEADER
471: return $Str;
472: }
473:
474: ######################################################################
475: ######################################################################
476:
477: =pod
478:
479: =item &print_basic_search_form()
480:
481: Prints the form for the basic search. Sorry the name is so cryptic.
482:
483: =cut
484:
485: ######################################################################
486: ######################################################################
487: sub print_basic_search_form {
488: my ($r,$closebutton,$hidden_fields) = @_;
489: my $bodytag=&Apache::loncommon::bodytag('Search').
490: &Apache::loncommon::help_open_topic('Finding_Resources').
491: &Apache::loncommon::help_open_bug('Searching');
492: my $scrout = &search_html_header().$bodytag;
493: if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
494: my $CatalogSearch=&mt('Catalog Search');
495: my $Statement=&searchhelp();
496: $scrout.=(<<ENDDOCUMENT);
497: <h1>$CatalogSearch</h1>
498: <form name="loncapa_search" method="post" action="/adm/searchcat">
499: <input type="hidden" name="phase" value="basic_search" />
500: $hidden_fields
501: <p>
502: $Statement.
503: </p>
504: <p>
505: <table>
506: <tr><td>
507: ENDDOCUMENT
508: $scrout.=' '.
509: &Apache::lonhtmlcommon::textbox('basicexp',
510: $ENV{'form.basicexp'},40).
511: ' ';
512: my $relatedcheckbox =
513: &Apache::lonhtmlcommon::checkbox('related',
514: $ENV{'form.related'});
515: my $domain = $r->dir_config('lonDefDomain');
516: my $domaincheckbox =
517: &Apache::lonhtmlcommon::checkbox('domains',
518: $ENV{'form.domains'});
519: my $srch=&mt('Search');
520: my $header=&mt('Advanced Search');
521: my $userelatedwords=&mt('use related words');
522: my $onlysearchdomain=&mt('only search domain');
523: my $view=&viewoptions();
524: $scrout.=<<END;
525: </td><td><a
526: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
527: >$header</a></td></tr>
528: <tr><td>$relatedcheckbox $userelatedwords</td>
529: <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
530: </table>
531: </p>
532: $view
533: <p>
534: <input type="submit" name="basicsubmit" value='$srch' />
535: $closebutton
536: END
537: $scrout.=<<ENDDOCUMENT;
538: </p>
539: </form>
540: ENDDOCUMENT
541: }
542: if ($ENV{'request.course.id'}) {
543: my %lt=&Apache::lonlocal::texthash(
544: 'srch' => 'Search',
545: 'header' => 'Course Search',
546: 'note' => 'Enter terms or phrases, then press "Search" below',
547: 'use' => 'use related words',
548: 'full' =>'fulltext search (time consuming)'
549: );
550: $scrout.=(<<ENDCOURSESEARCH);
551: <hr />
552: <h1>$lt{'header'}</h1>
553: <form name="course_search" method="post" action="/adm/searchcat">
554: <input type="hidden" name="phase" value="course_search" />
555: $hidden_fields
556: <p>
557: $lt{'note'}.
558: </p>
559: <p>
560: <table>
561: <tr><td>
562: ENDCOURSESEARCH
563: $scrout.=' '.
564: &Apache::lonhtmlcommon::textbox('courseexp',
565: $ENV{'form.courseexp'},40);
566: my $crscheckbox =
567: &Apache::lonhtmlcommon::checkbox('crsfulltext',
568: $ENV{'form.crsfulltext'});
569: my $relcheckbox =
570: &Apache::lonhtmlcommon::checkbox('crsrelated',
571: $ENV{'form.crsrelated'});
572: $scrout.=(<<ENDENDCOURSE);
573: </td></tr>
574: <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
575: <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
576: </table><p>
577: <input type="submit" name="coursesubmit" value='$lt{'srch'}' />
578: </p>
579: ENDENDCOURSE
580: }
581: $scrout.=(<<ENDDOCUMENT);
582: </body>
583: </html>
584: ENDDOCUMENT
585: $r->print($scrout);
586: return;
587: }
588: ######################################################################
589: ######################################################################
590:
591: =pod
592:
593: =item &advanced_search_form()
594:
595: Prints the advanced search form.
596:
597: =cut
598:
599: ######################################################################
600: ######################################################################
601: sub print_advanced_search_form{
602: my ($r,$closebutton,$hidden_fields) = @_;
603: my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
604: 'reset' => 'Reset',
605: 'help' => 'Help');
606: my $advanced_buttons = <<"END";
607: <p>
608: <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
609: <input type="reset" name="reset" value='$lt{"reset"}' />
610: $closebutton
611: <input type="button" value="$lt{'help'}" onClick="openhelp()" />
612: </p>
613: END
614: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
615: my $searchhelp=&searchhelp();
616: my $scrout=&search_html_header();
617: $scrout .= <<"ENDHEADER";
618: $bodytag
619: $searchhelp
620: <form method="post" action="/adm/searchcat" name="advsearch">
621: $advanced_buttons
622: $hidden_fields
623: <input type="hidden" name="phase" value="adv_search" />
624: ENDHEADER
625: $scrout.=&viewoptions();
626: my %fields=&Apache::lonmeta::fieldnames();
627:
628: $scrout.='<table>';
629: $scrout.="<tr><th>".&mt('Field').'</th><th>'.&mt('Value').'</th><th>'
630: .&mt('Related').'<br />'.&mt('Words')."</td></tr>\n";
631: foreach ('title','author','owner','authorspace','modifyinguser',
632: 'keywords','notes','abstract','standards',
633: 'lowestgradelevel','highestgradelevel','mime') {
634: $scrout.='<tr><td>'.&titlefield($fields{$_}).'</td><td>'.
635: &Apache::lonmeta::prettyinput($_,$ENV{'form.'.$_},$_,'advsearch',
636: 1,'</td><td>',$ENV{'form.'.$_.'_related'}).
637: '</td></tr>';
638: }
639: $scrout.='<tr><td>'.
640: &titlefield(&mt('MIME Type Category')).'</td><td>'.
641: &Apache::loncommon::filecategoryselect('category',
642: $ENV{'form.category'}).
643: '</td><td> </td></td></tr>';
644: $scrout.='<tr><td>'.
645: &titlefield(&mt('Limit Search to Domains')).'</td><td>'.
646: &Apache::loncommon::domain_select('domains',
647: $ENV{'form.domains'},1).
648: '</td><td> </td></td></tr>';
649: my %dates=&Apache::lonlocal::texthash
650: ('creationdatestart' => 'Creation Date After',
651: 'creationdateend' => 'Creation Date Before',
652: 'lastrevisiondatestart' => 'Last Revision Date After',
653: 'lastrevisiondateend' => 'Last Revision Date Before');
654: foreach (sort keys %dates) {
655: $scrout.='<tr>'.
656: '<td>'.&titlefield($dates{$_}).'</td><td>'.
657: &Apache::lonhtmlcommon::date_setter('advsearch',$_,0,'',1).
658: '</td><td> </td></td>'.
659: '</tr>';
660: }
661:
662: $scrout.="</table>\n";
663: $scrout.=<<ENDDOCUMENT;
664: $advanced_buttons
665: </form>
666: </body>
667: </html>
668: ENDDOCUMENT
669: $r->print($scrout);
670: return;
671: }
672:
673: ######################################################################
674: ######################################################################
675:
676: =pod
677:
678: =item &titlefield()
679:
680: Inputs: title text
681:
682: Outputs: titletext with font wrapper
683:
684: =cut
685:
686: ######################################################################
687: ######################################################################
688: sub titlefield {
689: my $title=shift;
690: return '<font face="arial" color="#800000">'.$title.'</font>';
691: }
692:
693: ######################################################################
694: ######################################################################
695:
696: =pod
697:
698: =item viewoptiontext()
699:
700: Inputs: codename for view option
701:
702: Outputs: displayed text
703:
704: =cut
705:
706: ######################################################################
707: ######################################################################
708: sub viewoptiontext {
709: my $code=shift;
710: my %desc=&Apache::lonlocal::texthash
711: ('detailed' => "Detailed Citation View",
712: 'xml' => 'XML/SGML',
713: 'compact' => 'Compact View',
714: 'fielded' => 'Fielded Format',
715: 'summary' => 'Summary View');
716: return $desc{$code};
717: }
718:
719: ######################################################################
720: ######################################################################
721:
722: =pod
723:
724: =item viewoptions()
725:
726: Inputs: none
727:
728: Outputs: text for box with view options
729:
730: =cut
731:
732: ######################################################################
733: ######################################################################
734: sub viewoptions {
735: my $scrout="\n\n".'<table>'.
736: '<tr><th>'.&mt('View Options').'</th><th>'.
737: &mt('Records per Page').'</th></tr><tr><td>';
738: unless ($ENV{'form.viewselect'}) { $ENV{'form.viewselect'}='detailed'; }
739: $scrout.=&Apache::lonmeta::selectbox('viewselect',
740: $ENV{'form.viewselect'},
741: \&viewoptiontext,
742: sort(keys(%Views)));
743: $scrout.='</td><td>';
744: $scrout.=&Apache::lonmeta::selectbox('show',
745: $ENV{'form.show'},
746: undef,
747: (10,20,50,100,1000,10000));
748: $scrout.="</td></tr></table>\n\n";
749: return $scrout;
750: }
751:
752: ######################################################################
753: ######################################################################
754:
755: =pod
756:
757: =item searchhelp()
758:
759: Inputs: none
760:
761: Outputs: return little blurb on how to enter searches
762:
763: =cut
764:
765: ######################################################################
766: ######################################################################
767: sub searchhelp {
768: return &mt('Enter terms or phrases separated by AND, OR, or NOT');
769: }
770:
771: ######################################################################
772: ######################################################################
773:
774: =pod
775:
776: =item &get_persistent_form_data()
777:
778: Inputs: filename of database
779:
780: Outputs: returns undef on database errors.
781:
782: This function is the reverse of &make_persistent() for form data.
783: Retrieve persistent data from %persistent_db. Retrieved items will have their
784: values unescaped. If a form value already exists in $ENV, it will not be
785: overwritten. Form values that are array references may have values appended
786: to them.
787:
788: =cut
789:
790: ######################################################################
791: ######################################################################
792: sub get_persistent_form_data {
793: my $filename = shift;
794: return 0 if (! -e $filename);
795: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
796: &GDBM_READER(),0640));
797: #
798: # These make sure we do not get array references printed out as 'values'.
799: my %arrays_allowed = ('form.domains'=>1);
800: #
801: # Loop through the keys, looking for 'form.'
802: foreach my $name (keys(%persistent_db)) {
803: next if ($name !~ /^form./);
804: # Kludgification begins!
805: if ($name eq 'form.domains' &&
806: $ENV{'form.searchmode'} eq 'basic' &&
807: $ENV{'form.phase'} ne 'disp_basic') {
808: next;
809: }
810: # End kludge (hopefully)
811: next if (exists($ENV{$name}));
812: my @values = map {
813: &Apache::lonnet::unescape($_);
814: } split(',',$persistent_db{$name});
815: next if (@values <1);
816: if ($arrays_allowed{$name}) {
817: $ENV{$name} = [@values];
818: } else {
819: $ENV{$name} = $values[0] if ($values[0]);
820: }
821: }
822: untie (%persistent_db);
823: return 1;
824: }
825:
826: ######################################################################
827: ######################################################################
828:
829: =pod
830:
831: =item &get_persistent_data()
832:
833: Inputs: filename of database, ref to array of values to recover.
834:
835: Outputs: array of values. Returns undef on error.
836:
837: This function is the reverse of &make_persistent();
838: Retrieve persistent data from %persistent_db. Retrieved items will have their
839: values unescaped. If the item contains commas (before unescaping), the
840: returned value will be an array pointer.
841:
842: =cut
843:
844: ######################################################################
845: ######################################################################
846: sub get_persistent_data {
847: my $filename = shift;
848: my @Vars = @{shift()};
849: my @Values; # Return array
850: return undef if (! -e $filename);
851: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
852: &GDBM_READER(),0640));
853: foreach my $name (@Vars) {
854: if (! exists($persistent_db{$name})) {
855: push @Values, undef;
856: next;
857: }
858: my @values = map {
859: &Apache::lonnet::unescape($_);
860: } split(',',$persistent_db{$name});
861: if (@values <= 1) {
862: push @Values,$values[0];
863: } else {
864: push @Values,\@values;
865: }
866: }
867: untie (%persistent_db);
868: return @Values;
869: }
870:
871: ######################################################################
872: ######################################################################
873:
874: =pod
875:
876: =item &make_persistent()
877:
878: Inputs: Hash of values to save, filename of persistent database.
879:
880: Store variables away to the %persistent_db.
881: Values will be escaped. Values that are array pointers will have their
882: elements escaped and concatenated in a comma separated string.
883:
884: =cut
885:
886: ######################################################################
887: ######################################################################
888: sub make_persistent {
889: my %save = %{shift()};
890: my $filename = shift;
891: return undef if (! tie(%persistent_db,'GDBM_File',
892: $filename,&GDBM_WRCREAT(),0640));
893: foreach my $name (keys(%save)) {
894: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
895: # We handle array references, but not recursively.
896: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
897: $persistent_db{$name} = $store;
898: }
899: untie(%persistent_db);
900: return 1;
901: }
902:
903: ######################################################################
904: ######################################################################
905:
906: =pod
907:
908: =item &make_form_data_persistent()
909:
910: Inputs: filename of persistent database.
911:
912: Store most form variables away to the %persistent_db.
913: Values will be escaped. Values that are array pointers will have their
914: elements escaped and concatenated in a comma separated string.
915:
916: =cut
917:
918: ######################################################################
919: ######################################################################
920: sub make_form_data_persistent {
921: my $r = shift;
922: my $filename = shift;
923: my %save;
924: foreach (keys(%ENV)) {
925: next if (!/^form/ || /submit/);
926: $save{$_} = $ENV{$_};
927: }
928: return &make_persistent(\%save,$filename);
929: }
930:
931: ######################################################################
932: ######################################################################
933:
934: =pod
935:
936: =item &parse_advanced_search()
937:
938: Parse advanced search form and return the following:
939:
940: =over 4
941:
942: =item $query Scalar containing an SQL query.
943:
944: =item $customquery Scalar containing a custom query.
945:
946: =item $customshow Scalar containing commands to show custom metadata.
947:
948: =item $libraries_to_query Reference to array of domains to search.
949:
950: =back
951:
952: =cut
953:
954: ######################################################################
955: ######################################################################
956: sub parse_advanced_search {
957: my ($r,$closebutton,$hidden_fields)=@_;
958: my $fillflag=0;
959: my $pretty_search_string = "<br />\n";
960: # Clean up fields for safety
961: for my $field ('title','author','subject','keywords','url','version',
962: 'creationdatestart_month','creationdatestart_day',
963: 'creationdatestart_year','creationdateend_month',
964: 'creationdateend_day','creationdateend_year',
965: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
966: 'lastrevisiondatestart_year','lastrevisiondateend_month',
967: 'lastrevisiondateend_day','lastrevisiondateend_year',
968: 'notes','abstract','extension','language','owner',
969: 'custommetadata','customshow','category') {
970: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
971: }
972: foreach ('mode','form','element') {
973: # is this required? Hmmm.
974: next unless (exists($ENV{"form.$_"}));
975: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
976: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
977: }
978: # Preprocess the category form element.
979: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
980: ref($ENV{'form.category'}));
981: #
982: # Check to see if enough information was filled in
983: for my $field ('title','author','subject','keywords','url','version',
984: 'notes','abstract','category','extension','language',
985: 'owner','custommetadata') {
986: if (&filled($ENV{"form.$field"})) {
987: $fillflag++;
988: }
989: }
990: unless ($fillflag) {
991: &output_blank_field_error($r,$closebutton,
992: 'phase=disp_adv',$hidden_fields);
993: return ;
994: }
995: # Turn the form input into a SQL-based query
996: my $query='';
997: my @queries;
998: my $font = '<font color="#800000" face="helvetica">';
999: # Evaluate logical expression AND/OR/NOT phrase fields.
1000: foreach my $field ('title','author','subject','notes','abstract','url',
1001: 'keywords','version','owner','standards') {
1002: if ($ENV{'form.'.$field}) {
1003: my $searchphrase = $ENV{'form.'.$field};
1004: $pretty_search_string .= $font."$field</font> contains <b>".
1005: $searchphrase."</b>";
1006: if ($ENV{'form.'.$field.'_related'}) {
1007: my @New_Words;
1008: ($searchphrase,@New_Words) = &related_version($searchphrase);
1009: if (@New_Words) {
1010: $pretty_search_string .= " with related words: ".
1011: "<b>@New_Words</b>.";
1012: } else {
1013: $pretty_search_string .= " with no related words.";
1014: }
1015: }
1016: $pretty_search_string .= "<br />\n";
1017: push @queries,&build_SQL_query($field,$searchphrase);
1018: }
1019: }
1020: #
1021: # Make the 'mime' from 'form.category' and 'form.extension'
1022: #
1023: my $searchphrase;
1024: if (exists($ENV{'form.category'}) &&
1025: $ENV{'form.category'} !~ /^\s*$/ &&
1026: $ENV{'form.category'} ne 'any') {
1027: my @extensions = &Apache::loncommon::filecategorytypes
1028: ($ENV{'form.category'});
1029: if (scalar(@extensions) > 0) {
1030: $searchphrase = join(' OR ',@extensions);
1031: }
1032: }
1033: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1034: $searchphrase .= ' OR ' if (defined($searchphrase));
1035: my @extensions = split(/,/,$ENV{'form.extension'});
1036: $searchphrase .= join(' OR ',@extensions);
1037: }
1038: if (defined($searchphrase)) {
1039: push @queries,&build_SQL_query('mime',$searchphrase);
1040: $pretty_search_string .=$font.'mime</font> contains <b>'.
1041: $searchphrase.'</b><br />';
1042: }
1043: #
1044: # Evaluate option lists
1045: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1046: push @queries,"(language like \"$ENV{'form.language'}\")";
1047: $pretty_search_string.=$font."language</font>= ".
1048: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1049: "<br />\n";
1050: }
1051: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1052: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1053: $pretty_search_string.=$font."copyright</font> = ".
1054: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1055: "<br \>\n";
1056: }
1057: #
1058: # Evaluate date windows
1059: my $datequery=&build_date_queries(
1060: $ENV{'form.creationdatestart_month'},
1061: $ENV{'form.creationdatestart_day'},
1062: $ENV{'form.creationdatestart_year'},
1063: $ENV{'form.creationdateend_month'},
1064: $ENV{'form.creationdateend_day'},
1065: $ENV{'form.creationdateend_year'},
1066: $ENV{'form.lastrevisiondatestart_month'},
1067: $ENV{'form.lastrevisiondatestart_day'},
1068: $ENV{'form.lastrevisiondatestart_year'},
1069: $ENV{'form.lastrevisiondateend_month'},
1070: $ENV{'form.lastrevisiondateend_day'},
1071: $ENV{'form.lastrevisiondateend_year'},
1072: );
1073: # Test to see if date windows are legitimate
1074: if ($datequery=~/^Incorrect/) {
1075: &output_date_error($r,$datequery,$closebutton,$hidden_fields);
1076: return ;
1077: } elsif ($datequery) {
1078: # Here is where you would set up pretty_search_string to output
1079: # date query information.
1080: push @queries,$datequery;
1081: }
1082: #
1083: # Process form information for custom metadata querying
1084: my $customquery=undef;
1085: ##
1086: ## The custom metadata search was removed q long time ago mostly
1087: ## because I was unable to figureout exactly how it worked and could
1088: ## not imagine people actually using it. MH
1089: ##
1090: # if ($ENV{'form.custommetadata'}) {
1091: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1092: # $ENV{'form.custommetadata'}."</b><br />\n";
1093: # $customquery=&build_custommetadata_query('custommetadata',
1094: # $ENV{'form.custommetadata'});
1095: # }
1096: my $customshow=undef;
1097: # if ($ENV{'form.customshow'}) {
1098: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1099: # $ENV{'form.customshow'}."</b><br />\n";
1100: # $customshow=$ENV{'form.customshow'};
1101: # $customshow=~s/[^\w\s]//g;
1102: # my @fields=split(/\s+/,$customshow);
1103: # $customshow=join(" ",@fields);
1104: # }
1105: ##
1106: ## Deal with restrictions to given domains
1107: ##
1108: my ($libraries_to_query,$pretty_domains_string) =
1109: &parse_domain_restrictions();
1110: $pretty_search_string .= $pretty_domains_string."<br />\n";
1111: #
1112: if (@queries) {
1113: $query=join(" AND ",@queries);
1114: $query="select * from metadata where $query";
1115: } elsif ($customquery) {
1116: $query = '';
1117: }
1118: return ($query,$customquery,$customshow,$libraries_to_query,
1119: $pretty_search_string);
1120: }
1121:
1122: sub parse_domain_restrictions {
1123: my $libraries_to_query = undef;
1124: # $ENV{'form.domains'} can be either a scalar or an array reference.
1125: # We need an array.
1126: if (! exists($ENV{'form.domains'})) {
1127: return (undef,'');
1128: }
1129: my @allowed_domains;
1130: if (ref($ENV{'form.domains'})) {
1131: @allowed_domains = @{$ENV{'form.domains'}};
1132: } else {
1133: @allowed_domains = ($ENV{'form.domains'});
1134: }
1135: #
1136: my %domain_hash = ();
1137: my $pretty_domains_string;
1138: foreach (@allowed_domains) {
1139: $domain_hash{$_}++;
1140: }
1141: if ($domain_hash{'any'}) {
1142: $pretty_domains_string = "In all LON-CAPA domains.";
1143: } else {
1144: if (@allowed_domains > 1) {
1145: $pretty_domains_string = "In LON-CAPA domains:";
1146: } else {
1147: $pretty_domains_string = "In LON-CAPA domain ";
1148: }
1149: foreach (sort @allowed_domains) {
1150: $pretty_domains_string .= "<b>".$_."</b> ";
1151: }
1152: foreach (keys(%Apache::lonnet::libserv)) {
1153: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1154: push @$libraries_to_query,$_;
1155: }
1156: }
1157: }
1158: return ($libraries_to_query,$pretty_domains_string);
1159: }
1160:
1161: ######################################################################
1162: ######################################################################
1163:
1164: =pod
1165:
1166: =item &parse_basic_search()
1167:
1168: Parse the basic search form and return a scalar containing an sql query.
1169:
1170: =cut
1171:
1172: ######################################################################
1173: ######################################################################
1174: sub parse_basic_search {
1175: my ($r,$closebutton)=@_;
1176: #
1177: # Clean up fields for safety
1178: for my $field ('basicexp') {
1179: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1180: }
1181: foreach ('mode','form','element') {
1182: # is this required? Hmmm.
1183: next unless (exists($ENV{"form.$_"}));
1184: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1185: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1186: }
1187: my ($libraries_to_query,$pretty_domains_string) =
1188: &parse_domain_restrictions();
1189: #
1190: # Check to see if enough of a query is filled in
1191: unless (&filled($ENV{'form.basicexp'})) {
1192: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1193: return OK;
1194: }
1195: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1196: my $search_string = $ENV{'form.basicexp'};
1197: if ($ENV{'form.related'}) {
1198: my @New_Words;
1199: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1200: if (@New_Words) {
1201: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1202: } else {
1203: $pretty_search_string .= " with no related words.";
1204: }
1205: }
1206: #
1207: # Build SQL query string based on form page
1208: my $query='';
1209: my $concatarg=join(',',
1210: ('title', 'author', 'subject', 'notes', 'abstract',
1211: 'keywords'));
1212: $concatarg='title' if $ENV{'form.titleonly'};
1213: $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
1214: if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
1215: $pretty_search_string .= ' '.$pretty_domains_string;
1216: }
1217: $pretty_search_string .= "<br />\n";
1218: my $final_query = 'SELECT * FROM metadata WHERE '.$query;
1219: # &Apache::lonnet::logthis($final_query);
1220: return ($final_query,$pretty_search_string,
1221: $libraries_to_query);
1222: }
1223:
1224: ######################################################################
1225: ######################################################################
1226:
1227: =pod
1228:
1229: =item &related_version()
1230:
1231: Modifies an input string to include related words. Words in the string
1232: are replaced with parenthesized lists of 'OR'd words. For example
1233: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1234:
1235: Note: Using this twice on a string is probably silly.
1236:
1237: =cut
1238:
1239: ######################################################################
1240: ######################################################################
1241: sub related_version {
1242: my $search_string = shift;
1243: my $result = $search_string;
1244: my %New_Words = ();
1245: while ($search_string =~ /(\w+)/cg) {
1246: my $word = $1;
1247: next if (lc($word) =~ /\b(or|and|not)\b/);
1248: my @Words = &Apache::loncommon::get_related_words($word);
1249: @Words = ($#Words>4? @Words[0..4] : @Words);
1250: foreach (@Words) { $New_Words{$_}++;}
1251: my $replacement = join " OR ", ($word,@Words);
1252: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1253: }
1254: return $result,sort(keys(%New_Words));
1255: }
1256:
1257: ######################################################################
1258: ######################################################################
1259:
1260: =pod
1261:
1262: =item &build_SQL_query()
1263:
1264: Builds a SQL query string from a logical expression with AND/OR keywords
1265: using Text::Query and &recursive_SQL_query_builder()
1266:
1267: =cut
1268:
1269: ######################################################################
1270: ######################################################################
1271: sub build_SQL_query {
1272: my ($field_name,$logic_statement)=@_;
1273: my $q=new Text::Query('abc',
1274: -parse => 'Text::Query::ParseAdvanced',
1275: -build => 'Text::Query::Build');
1276: $q->prepare($logic_statement);
1277: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1278: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1279: return $sql_query;
1280: }
1281:
1282: ######################################################################
1283: ######################################################################
1284:
1285: =pod
1286:
1287: =item &build_custommetadata_query()
1288:
1289: Constructs a custom metadata query using a rather heinous regular
1290: expression.
1291:
1292: =cut
1293:
1294: ######################################################################
1295: ######################################################################
1296: sub build_custommetadata_query {
1297: my ($field_name,$logic_statement)=@_;
1298: my $q=new Text::Query('abc',
1299: -parse => 'Text::Query::ParseAdvanced',
1300: -build => 'Text::Query::BuildAdvancedString');
1301: $q->prepare($logic_statement);
1302: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1303: # quick fix to change literal into xml tag-matching
1304: # will eventually have to write a separate builder module
1305: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1306: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1307: /\\<$1\\>?# \<wordone\>
1308: \[\^\\<\]?# [^\<]
1309: \*$2\[\^\\<\]?# *wordtwo[^\<]
1310: \*\\<\\\/$1\\>?# *\<\/wordone\>
1311: /g;
1312: return $matchexp;
1313: }
1314:
1315: ######################################################################
1316: ######################################################################
1317:
1318: =pod
1319:
1320: =item &recursive_SQL_query_build()
1321:
1322: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1323:
1324: =cut
1325:
1326: ######################################################################
1327: ######################################################################
1328: sub recursive_SQL_query_build {
1329: my ($dkey,$pattern)=@_;
1330: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1331: return $pattern unless @matches;
1332: foreach my $match (@matches) {
1333: $match=~/\[ (\w+)\s(.*) \]/;
1334: my ($key,$value)=($1,$2);
1335: my $replacement='';
1336: if ($key eq 'literal') {
1337: $replacement="($dkey LIKE \"\%$value\%\")";
1338: } elsif (lc($key) eq 'not') {
1339: $value=~s/LIKE/NOT LIKE/;
1340: # $replacement="($dkey not like $value)";
1341: $replacement="$value";
1342: } elsif ($key eq 'and') {
1343: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1344: $replacement="($1 AND $2)";
1345: } elsif ($key eq 'or') {
1346: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1347: $replacement="($1 OR $2)";
1348: }
1349: substr($pattern,
1350: index($pattern,$match),
1351: length($match),
1352: $replacement);
1353: }
1354: &recursive_SQL_query_build($dkey,$pattern);
1355: }
1356:
1357: ######################################################################
1358: ######################################################################
1359:
1360: =pod
1361:
1362: =item &build_date_queries()
1363:
1364: Builds a SQL logic query to check time/date entries.
1365: Also reports errors (check for /^Incorrect/).
1366:
1367: =cut
1368:
1369: ######################################################################
1370: ######################################################################
1371: sub build_date_queries {
1372: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1373: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1374: my @queries;
1375: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1376: unless ($cmonth1 and $cday1 and $cyear1 and
1377: $cmonth2 and $cday2 and $cyear2) {
1378: return "Incorrect entry for the creation date. You must specify ".
1379: "a starting month, day, and year and an ending month, ".
1380: "day, and year.";
1381: }
1382: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1383: $cnumeric1+=0;
1384: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1385: $cnumeric2+=0;
1386: if ($cnumeric1>$cnumeric2) {
1387: return "Incorrect entry for the creation date. The starting ".
1388: "date must occur before the ending date.";
1389: }
1390: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1391: "$cyear2-$cmonth2-$cday2 23:59:59')";
1392: push @queries,$cquery;
1393: }
1394: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1395: unless ($lmonth1 and $lday1 and $lyear1 and
1396: $lmonth2 and $lday2 and $lyear2) {
1397: return "Incorrect entry for the last revision date. You must ".
1398: "specify a starting month, day, and year and an ending ".
1399: "month, day, and year.";
1400: }
1401: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1402: $lnumeric1+=0;
1403: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1404: $lnumeric2+=0;
1405: if ($lnumeric1>$lnumeric2) {
1406: return "Incorrect entry for the last revision date. The ".
1407: "starting date must occur before the ending date.";
1408: }
1409: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1410: "$lyear2-$lmonth2-$lday2 23:59:59')";
1411: push @queries,$lquery;
1412: }
1413: if (@queries) {
1414: return join(" AND ",@queries);
1415: }
1416: return '';
1417: }
1418:
1419: ######################################################################
1420: ######################################################################
1421:
1422: =pod
1423:
1424: =item ©right_check()
1425:
1426: Inputs: $Metadata, a hash pointer of metadata for a resource.
1427:
1428: Returns: 1 if the resource is available to the user making the query,
1429: 0 otherwise.
1430:
1431: =cut
1432:
1433: ######################################################################
1434: ######################################################################
1435: sub copyright_check {
1436: my $Metadata = shift;
1437: # Check copyright tags and skip results the user cannot use
1438: my (undef,undef,$resdom,$resname) = split('/',
1439: $Metadata->{'url'});
1440: # Check for priv
1441: if (($Metadata->{'copyright'} eq 'priv') &&
1442: (($ENV{'user.name'} ne $resname) &&
1443: ($ENV{'user.domain'} ne $resdom))) {
1444: return 0;
1445: }
1446: # Check for domain
1447: if (($Metadata->{'copyright'} eq 'domain') &&
1448: ($ENV{'user.domain'} ne $resdom)) {
1449: return 0;
1450: }
1451: return 1;
1452: }
1453:
1454: ######################################################################
1455: ######################################################################
1456:
1457: =pod
1458:
1459: =item &ensure_db_and_table()
1460:
1461: Ensure we can get lonmysql to connect to the database and the table we
1462: need exists.
1463:
1464: Inputs: $r, table id
1465:
1466: Returns: undef on error, 1 if the table exists.
1467:
1468: =cut
1469:
1470: ######################################################################
1471: ######################################################################
1472: sub ensure_db_and_table {
1473: my ($r,$table) = @_;
1474: ##
1475: ## Sanity check the table id.
1476: ##
1477: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1478: $r->print("Unable to retrieve search results. ".
1479: "Unable to determine the table results were stored in. ".
1480: "</body></html>");
1481: return undef;
1482: }
1483: ##
1484: ## Make sure we can connect and the table exists.
1485: ##
1486: my $connection_result = &Apache::lonmysql::connect_to_db();
1487: if (!defined($connection_result)) {
1488: $r->print("Unable to connect to the MySQL database where your results".
1489: " are stored. </body></html>");
1490: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1491: " connect to database.");
1492: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1493: return undef;
1494: }
1495: my $table_check = &Apache::lonmysql::check_table($table);
1496: if (! defined($table_check)) {
1497: $r->print("A MySQL error has occurred.</form></body></html>");
1498: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1499: " of table ".$table);
1500: return undef;
1501: } elsif (! $table_check) {
1502: $r->print("The table of results could not be found.");
1503: &Apache::lonnet::logthis("The user requested a table, ".$table.
1504: ", that could not be found.");
1505: return undef;
1506: }
1507: return 1;
1508: }
1509:
1510: ######################################################################
1511: ######################################################################
1512:
1513: =pod
1514:
1515: =item &print_sort_form()
1516:
1517: The sort feature is not implemented at this time. This form just prints
1518: a link to change the search query.
1519:
1520: =cut
1521:
1522: ######################################################################
1523: ######################################################################
1524: sub print_sort_form {
1525: my ($r,$pretty_query_string) = @_;
1526: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1527: ##
1528: my %SortableFields=&Apache::lonlocal::texthash(
1529: id => 'Default',
1530: title => 'Title',
1531: author => 'Author',
1532: subject => 'Subject',
1533: url => 'URL',
1534: version => 'Version Number',
1535: mime => 'Mime type',
1536: lang => 'Language',
1537: owner => 'Owner/Publisher',
1538: copyright => 'Copyright',
1539: hostname => 'Host',
1540: creationdate => 'Creation Date',
1541: lastrevisiondate => 'Revision Date'
1542: );
1543: ##
1544: my $table = $ENV{'form.table'};
1545: return if (! &ensure_db_and_table($r,$table));
1546: ##
1547: ## Get the number of results
1548: ##
1549: my $total_results = &Apache::lonmysql::number_of_rows($table);
1550: if (! defined($total_results)) {
1551: $r->print("A MySQL error has occurred.</form></body></html>");
1552: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1553: " of rows in table ".$table);
1554: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1555: return;
1556: }
1557: my $result;
1558: $result.=<<END;
1559: <html>
1560: <head>
1561: <script>
1562: function change_sort() {
1563: var newloc = "/adm/searchcat?phase=results";
1564: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1565: newloc += "&sortby=";
1566: newloc += document.forms.statusform.elements.sortby.value;
1567: parent.resultsframe.location= newloc;
1568: }
1569: </script>
1570: <title>Results</title>
1571: </head>
1572: $bodytag
1573: <form name="statusform" action="" method="post">
1574: <input type="hidden" name="Queue" value="" />
1575: END
1576:
1577: #<h2>Sort Results</h2>
1578: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1579: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1580: # foreach (keys(%SortableFields)) {
1581: # $result.="<option name=\"$_\"";
1582: # if ($_ eq $ENV{'form.sortby'}) {
1583: # $result.=" selected ";
1584: # }
1585: # $result.=" >$SortableFields{$_}</option>\n";
1586: # }
1587: # $result.="</select>\n";
1588: my $revise = &revise_button();
1589: $result.=<<END;
1590: <p>
1591: There are $total_results matches to your query. $revise
1592: </p><p>
1593: Search:$pretty_query_string
1594: </p>
1595: </form>
1596: </body>
1597: </html>
1598: END
1599: $r->print($result);
1600: return;
1601: }
1602:
1603: #####################################################################
1604: #####################################################################
1605:
1606: =pod
1607:
1608: =item MySQL Table Description
1609:
1610: MySQL table creation requires a precise description of the data to be
1611: stored. The use of the correct types to hold data is vital to efficient
1612: storage and quick retrieval of records. The columns must be described in
1613: the following format:
1614:
1615: =cut
1616:
1617: #####################################################################
1618: #####################################################################
1619: #
1620: # These should probably be scoped but I don't have time right now...
1621: #
1622: my @Datatypes;
1623: my @Fullindicies;
1624:
1625: ######################################################################
1626: ######################################################################
1627:
1628: =pod
1629:
1630: =item &create_results_table()
1631:
1632: Creates the table of search results by calling lonmysql. Stores the
1633: table id in $ENV{'form.table'}
1634:
1635: Inputs: none.
1636:
1637: Returns: the identifier of the table on success, undef on error.
1638:
1639: =cut
1640:
1641: ######################################################################
1642: ######################################################################
1643: sub set_up_table_structure {
1644: my ($datatypes,$fullindicies) =
1645: &LONCAPA::lonmetadata::describe_metadata_storage();
1646: unshift(@$datatypes,{name => 'id',
1647: type => 'MEDIUMINT',
1648: restrictions => 'UNSIGNED NOT NULL',
1649: primary_key => 'yes',
1650: auto_inc => 'yes' });
1651: @Datatypes = @{$datatypes};
1652: @Fullindicies = @{$fullindicies};
1653: return;
1654: }
1655:
1656: sub create_results_table {
1657: &set_up_table_structure();
1658: my $table = &Apache::lonmysql::create_table
1659: ( { columns => \@Datatypes,
1660: FULLTEXT => [{'columns' => \@Fullindicies},],
1661: } );
1662: if (defined($table)) {
1663: $ENV{'form.table'} = $table;
1664: return $table;
1665: }
1666: return undef; # Error...
1667: }
1668:
1669: ######################################################################
1670: ######################################################################
1671:
1672: =pod
1673:
1674: =item Search Status update functions
1675:
1676: Each of the following functions changes the values of one of the
1677: input fields used to display the search status to the user. The names
1678: should be explanatory.
1679:
1680: Inputs: Apache request handler ($r), text to display.
1681:
1682: Returns: Nothing.
1683:
1684: =over 4
1685:
1686: =item &update_count_status()
1687:
1688: =item &update_status()
1689:
1690: =item &update_seconds()
1691:
1692: =back
1693:
1694: =cut
1695:
1696: ######################################################################
1697: ######################################################################
1698: sub update_count_status {
1699: my ($r,$text) = @_;
1700: $text =~ s/\'/\\\'/g;
1701: $r->print
1702: ("<script>document.statusform.count.value = ' $text'</script>\n");
1703: $r->rflush();
1704: }
1705:
1706: sub update_status {
1707: my ($r,$text) = @_;
1708: $text =~ s/\'/\\\'/g;
1709: $r->print
1710: ("<script>document.statusform.status.value = ' $text'</script>\n");
1711: $r->rflush();
1712: }
1713:
1714: sub update_seconds {
1715: my ($r,$text) = @_;
1716: $text =~ s/\'/\\\'/g;
1717: $r->print
1718: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1719: $r->rflush();
1720: }
1721:
1722: ######################################################################
1723: ######################################################################
1724:
1725: =pod
1726:
1727: =item &revise_button()
1728:
1729: Inputs: None
1730:
1731: Returns: html string for a 'revise search' button.
1732:
1733: =cut
1734:
1735: ######################################################################
1736: ######################################################################
1737: sub revise_button {
1738: my $revise_phase = 'disp_basic';
1739: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1740: my $newloc = '/adm/searchcat'.
1741: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1742: '&cleargroupsort=1'.
1743: '&phase='.$revise_phase;
1744: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1745: qq{ onClick="parent.location='$newloc';" /> };
1746: return $result;
1747: }
1748:
1749: ######################################################################
1750: ######################################################################
1751:
1752: =pod
1753:
1754: =item &run_search()
1755:
1756: Executes a search query by sending it the the other servers and putting the
1757: results into MySQL.
1758:
1759: =cut
1760:
1761: ######################################################################
1762: ######################################################################
1763: sub run_search {
1764: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1765: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
1766: my $connection = $r->connection;
1767: #
1768: # Timing variables
1769: #
1770: my $starttime = time;
1771: my $max_time = 30; # seconds for the search to complete
1772: #
1773: # Print run_search header
1774: #
1775: $r->print(<<END);
1776: <html>
1777: <head><title>Search Status</title></head>
1778: $bodytag
1779: <form name="statusform" action="" method="post">
1780: <input type="hidden" name="Queue" value="" />
1781: END
1782: # Check to see if $pretty_string has more than one carriage return.
1783: # Assume \n s are following <br /> s and truncate the value.
1784: # (there is probably a better way)...
1785: my @Lines = split /<br \/>/,$pretty_string;
1786: if (@Lines > 2) {
1787: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1788: }
1789: $r->print(&mt("Search").": ".$pretty_string);
1790: $r->rflush();
1791: #
1792: # Determine the servers we need to contact.
1793: my @Servers_to_contact;
1794: if (defined($serverlist)) {
1795: if (ref($serverlist) eq 'ARRAY') {
1796: @Servers_to_contact = @$serverlist;
1797: } else {
1798: @Servers_to_contact = ($serverlist);
1799: }
1800: } else {
1801: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1802: }
1803: my %Server_status;
1804: my $table =$ENV{'form.table'};
1805: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1806: $r->print("Unable to determine table id to store search results in.".
1807: "The search has been aborted.</body></html>");
1808: return;
1809: }
1810: my $table_status = &Apache::lonmysql::check_table($table);
1811: if (! defined($table_status)) {
1812: $r->print("Unable to determine status of table.</body></html>");
1813: &Apache::lonnet::logthis("Bogus table id of $table for ".
1814: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1815: &Apache::lonnet::logthis("lonmysql error = ".
1816: &Apache::lonmysql::get_error());
1817: return;
1818: }
1819: if (! $table_status) {
1820: &Apache::lonnet::logthis("lonmysql error = ".
1821: &Apache::lonmysql::get_error());
1822: &Apache::lonnet::logthis("lonmysql debug = ".
1823: &Apache::lonmysql::get_debug());
1824: &Apache::lonnet::logthis('table status = "'.$table_status.'"');
1825: $r->print("The table id,$table, we tried to use is invalid.".
1826: "The search has been aborted.</body></html>");
1827: return;
1828: }
1829: ##
1830: ## Prepare for the big loop.
1831: my $hitcountsum;
1832: my $server;
1833: my $status;
1834: my $revise = &revise_button();
1835: $r->print(<<END);
1836: <table>
1837: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1838: <tr>
1839: <td><input type="text" name="status" value="" size="30" /></td>
1840: <td><input type="text" name="count" value="" size="10" /></td>
1841: <td><input type="text" name="seconds" value="" size="8" /></td>
1842: <td>$revise</td>
1843: </tr>
1844: </table>
1845: </form>
1846: END
1847: $r->rflush();
1848: my $time_remaining = $max_time - (time - $starttime) ;
1849: my $last_time = $time_remaining;
1850: &update_seconds($r,$time_remaining);
1851: &update_status($r,'contacting '.$Servers_to_contact[0]);
1852: while (($time_remaining > 0) &&
1853: ((@Servers_to_contact) || keys(%Server_status))) {
1854: # Send out a search request if it needs to be done.
1855: if (@Servers_to_contact) {
1856: # Contact one server
1857: my $server = shift(@Servers_to_contact);
1858: &update_status($r,&mt('contacting').' '.$server);
1859: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1860: $customshow,[$server]);
1861: ($server) = keys(%$reply);
1862: $Server_status{$server} = $reply->{$server};
1863: } else {
1864: # wait a sec. to give time for files to be written
1865: # This sleep statement is here instead of outside the else
1866: # block because we do not want to pause if we have servers
1867: # left to contact.
1868: if (scalar (keys(%Server_status))) {
1869: &update_status($r,
1870: &mt('waiting on').' '.(join(' ',keys(%Server_status))));
1871: }
1872: sleep(1);
1873: }
1874: #
1875: # Loop through the servers we have contacted but do not
1876: # have results from yet, looking for results.
1877: while (my ($server,$status) = each(%Server_status)) {
1878: last if ($connection->aborted());
1879: if ($status eq 'con_lost') {
1880: delete ($Server_status{$server});
1881: next;
1882: }
1883: $status=~/^([\.\w]+)$/;
1884: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1885: if (-e $datafile && ! -e "$datafile.end") {
1886: &update_status($r,&mt('Receiving results from').' '.$server);
1887: next;
1888: }
1889: last if ($connection->aborted());
1890: if (-e "$datafile.end") {
1891: &update_status($r,&mt('Reading results from').' '.$server);
1892: if (-z "$datafile") {
1893: delete($Server_status{$server});
1894: next;
1895: }
1896: my $fh;
1897: if (!($fh=Apache::File->new($datafile))) {
1898: $r->print("Unable to open search results file for ".
1899: "server $server. Omitting from search");
1900: delete($Server_status{$server});
1901: next;
1902: }
1903: # Read in the whole file.
1904: while (my $result = <$fh>) {
1905: last if ($connection->aborted());
1906: # handle custom fields? Someday we will!
1907: chomp($result);
1908: next unless $result;
1909: # Parse the result.
1910: my %Fields = &parse_raw_result($result,$server);
1911: $Fields{'hostname'} = $server;
1912: next if (! ©right_check(\%Fields));
1913: # Store the result in the mysql database
1914: my $result = &Apache::lonmysql::store_row($table,\%Fields);
1915: if (! defined($result)) {
1916: $r->print(&Apache::lonmysql::get_error());
1917: }
1918: # $r->print(&Apache::lonmysql::get_debug());
1919: $hitcountsum ++;
1920: $time_remaining = $max_time - (time - $starttime) ;
1921: if ($last_time - $time_remaining > 0) {
1922: &update_seconds($r,$time_remaining);
1923: $last_time = $time_remaining;
1924: }
1925: if ($hitcountsum % 50 == 0) {
1926: &update_count_status($r,$hitcountsum);
1927: }
1928: } # End of foreach (@results)
1929: $fh->close();
1930: # $server is only deleted if the results file has been
1931: # found and (successfully) opened. This may be a bad idea.
1932: delete($Server_status{$server});
1933: }
1934: last if ($connection->aborted());
1935: &update_count_status($r,$hitcountsum);
1936: }
1937: last if ($connection->aborted());
1938: # Finished looping through the servers
1939: $starttime = time if (@Servers_to_contact);
1940: $time_remaining = $max_time - (time - $starttime) ;
1941: if ($last_time - $time_remaining > 0) {
1942: $last_time = $time_remaining;
1943: &update_seconds($r,$time_remaining);
1944: }
1945: }
1946: &update_status($r,&mt('Search Complete').$server);
1947: &update_seconds($r,0);
1948: #
1949: &Apache::lonmysql::disconnect_from_db();
1950: #
1951: # We have run out of time or run out of servers to talk to and
1952: # results to get.
1953: $r->print("</body></html>");
1954: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
1955: $r->print("<script>".
1956: "window.location='/adm/searchcat?".
1957: "phase=sort&".
1958: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
1959: "</script>");
1960: }
1961: return;
1962: }
1963:
1964: ######################################################################
1965: ######################################################################
1966:
1967: =pod
1968:
1969: =item &prev_next_buttons()
1970:
1971: Returns html for the previous and next buttons on the search results page.
1972:
1973: =cut
1974:
1975: ######################################################################
1976: ######################################################################
1977: sub prev_next_buttons {
1978: my ($current_min,$show,$total,$parms) = @_;
1979: return '' if ($show eq 'all'); # No links if you get them all at once.
1980: my $links;
1981: ##
1982: ## Prev
1983: my $prev_min = $current_min - $show;
1984: $prev_min = 1 if $prev_min < 1;
1985: if ($prev_min < $current_min) {
1986: $links .=
1987: qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
1988: &mt('prev').'</a>';
1989: } else {
1990: $links .= &mt('prev');
1991: }
1992: ##
1993: ## Pages.... Someday.
1994: ##
1995: $links .=
1996: qq{
1997: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
1998: &mt('reload').'</a>';
1999: ##
2000: ## Next
2001: my $next_min = $current_min + $show;
2002: $next_min = $current_min if ($next_min > $total);
2003: if ($next_min != $current_min) {
2004: $links .=
2005: qq{
2006: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
2007: &mt('next').'</a>';
2008: } else {
2009: $links .= ' '.&mt('next');
2010: }
2011: return $links;
2012: }
2013:
2014: ######################################################################
2015: ######################################################################
2016:
2017: =pod
2018:
2019: =item &display_results()
2020:
2021: Prints the results out for selection and perusal.
2022:
2023: =cut
2024:
2025: ######################################################################
2026: ######################################################################
2027: sub display_results {
2028: my ($r,$importbutton,$closebutton,$diropendb) = @_;
2029: my $connection = $r->connection;
2030: $r->print(&search_results_header($importbutton,$closebutton));
2031: ##
2032: ## Set viewing function
2033: ##
2034: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2035: if (!defined($viewfunction)) {
2036: $r->print("Internal Error - Bad view selected.\n");
2037: $r->rflush();
2038: return;
2039: }
2040: ##
2041: ## $checkbox_num is a count of the number of checkboxes output on the
2042: ## page this is used only during catalogmode=groupsearch.
2043: my $checkbox_num = 0;
2044: ##
2045: ## Get the catalog controls setup
2046: ##
2047: my $action = "/adm/searchcat?phase=results";
2048: ##
2049: ## Deal with groupsearch by opening the groupsearch db file.
2050: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2051: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2052: &GDBM_WRCREAT(),0640)) {
2053: $r->print('Unable to store import results.</form></body></html>');
2054: $r->rflush();
2055: return;
2056: }
2057: }
2058: ##
2059: ## Prepare the table for querying
2060: my $table = $ENV{'form.table'};
2061: return if (! &ensure_db_and_table($r,$table));
2062: ##
2063: ## Get the number of results
2064: my $total_results = &Apache::lonmysql::number_of_rows($table);
2065: if (! defined($total_results)) {
2066: $r->print("A MySQL error has occurred.</form></body></html>");
2067: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2068: " of rows in table ".$table);
2069: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2070: return;
2071: }
2072: ##
2073: ## Determine how many results we need to get
2074: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2075: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2076: my $min = $ENV{'form.start'};
2077: my $max;
2078: if ($ENV{'form.show'} eq 'all') {
2079: $max = $total_results ;
2080: } else {
2081: $max = $min + $ENV{'form.show'} - 1;
2082: $max = $total_results if ($max > $total_results);
2083: }
2084: ##
2085: ## Output links (if necessary) for 'prev' and 'next' pages.
2086: $r->print
2087: ('<center>'.
2088: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2089: "table=".$ENV{'form.table'}.
2090: "&phase=results".
2091: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2092: ."</center>\n"
2093: );
2094: if ($total_results == 0) {
2095: $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
2096: '<h3>'.&mt('There are currently no results').'.</h3>'.
2097: "</form></body></html>");
2098: return;
2099: } else {
2100: $r->print
2101: ("<center>Results $min to $max out of $total_results</center>\n");
2102: }
2103: ##
2104: ## Get results from MySQL table
2105: my @Results = &Apache::lonmysql::get_rows($table,
2106: 'id>='.$min.' AND id<='.$max);
2107: ##
2108: ## Loop through the results and output them.
2109: foreach my $row (@Results) {
2110: if ($connection->aborted()) {
2111: &cleanup();
2112: return;
2113: }
2114: my %Fields = %{&parse_row(@$row)};
2115: my $output="<p>\n";
2116: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2117: $Fields{'id'},$checkbox_num++);
2118: # Render the result into html
2119: $output.= &$viewfunction($prefix,%Fields);
2120: # Print them out as they come in.
2121: $r->print($output);
2122: $r->rflush();
2123: }
2124: if (@Results < 1) {
2125: $r->print(&mt("There were no results matching your query"));
2126: } else {
2127: $r->print
2128: ('<center>'.
2129: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2130: "table=".$ENV{'form.table'}.
2131: "&phase=results".
2132: "&persistent_db_id=".
2133: $ENV{'form.persistent_db_id'})
2134: ."</center>\n"
2135: );
2136: }
2137: $r->print("</form></body></html>");
2138: $r->rflush();
2139: untie %groupsearch_db if (tied(%groupsearch_db));
2140: return;
2141: }
2142:
2143: ######################################################################
2144: ######################################################################
2145:
2146: =pod
2147:
2148: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2149:
2150: Returns html needed for the various catalog modes. Gets inputs from
2151: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2152:
2153: =cut
2154:
2155: ######################################################################
2156: ######################################################################
2157: sub catalogmode_output {
2158: my $output = '';
2159: my ($title,$url,$fnum,$checkbox_num) = @_;
2160: if ($ENV{'form.catalogmode'} eq 'interactive') {
2161: $title=~ s/\'/\\\'/g;
2162: if ($ENV{'form.catalogmode'} eq 'interactive') {
2163: $output.=<<END
2164: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2165: onClick="javascript:select_data('$title','$url')">
2166: </font>
2167: END
2168: }
2169: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2170: $groupsearch_db{"pre_${fnum}_link"}=$url;
2171: $groupsearch_db{"pre_${fnum}_title"}=$title;
2172: $output.=<<END;
2173: <font size='-1'>
2174: <input type="checkbox" name="returnvalues" value="SELECT"
2175: onClick="javascript:queue($checkbox_num,$fnum)" />
2176: </font>
2177: END
2178: }
2179: return $output;
2180: }
2181: ######################################################################
2182: ######################################################################
2183:
2184: =pod
2185:
2186: =item &parse_row()
2187:
2188: Parse a row returned from the database.
2189:
2190: =cut
2191:
2192: ######################################################################
2193: ######################################################################
2194: sub parse_row {
2195: my @Row = @_;
2196: my %Fields;
2197: if (! scalar(@Datatypes)) {
2198: &set_up_table_structure();
2199: }
2200: for (my $i=0;$i<=$#Row;$i++) {
2201: $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
2202: }
2203: $Fields{'language'} =
2204: &Apache::loncommon::languagedescription($Fields{'language'});
2205: $Fields{'copyrighttag'} =
2206: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2207: $Fields{'mimetag'} =
2208: &Apache::loncommon::filedescription($Fields{'mime'});
2209: return \%Fields;
2210: }
2211:
2212: ###########################################################
2213: ###########################################################
2214:
2215: =pod
2216:
2217: =item &parse_raw_result()
2218:
2219: Takes a line from the file of results and parse it. Returns a hash
2220: with keys according to column labels
2221:
2222: In addition, the following tags are set by calling the appropriate
2223: lonnet function: 'language', 'copyrighttag', 'mimetag'.
2224:
2225: The 'title' field is set to "Untitled" if the title field is blank.
2226:
2227: 'abstract' and 'keywords' are truncated to 200 characters.
2228:
2229: =cut
2230:
2231: ###########################################################
2232: ###########################################################
2233: sub parse_raw_result {
2234: my ($result,$hostname) = @_;
2235: # conclude from self to others regarding fields
2236: my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
2237: (map {
2238: &Apache::lonnet::unescape($_);
2239: } (split(/\,/,$result)) );
2240: return %Fields;
2241: }
2242:
2243: ###########################################################
2244: ###########################################################
2245:
2246: =pod
2247:
2248: =item &handle_custom_fields()
2249:
2250: =cut
2251:
2252: ###########################################################
2253: ###########################################################
2254: sub handle_custom_fields {
2255: my @results = @{shift()};
2256: my $customshow='';
2257: my $extrashow='';
2258: my @customfields;
2259: if ($ENV{'form.customshow'}) {
2260: $customshow=$ENV{'form.customshow'};
2261: $customshow=~s/[^\w\s]//g;
2262: my @fields=map {
2263: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2264: } split(/\s+/,$customshow);
2265: @customfields=split(/\s+/,$customshow);
2266: if ($customshow) {
2267: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2268: }
2269: }
2270: my $customdata='';
2271: my %customhash;
2272: foreach my $result (@results) {
2273: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2274: my $tmp=$result;
2275: $tmp=~s/^custom\=//;
2276: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2277: } split(/\,/,$tmp);
2278: $customhash{$k}=$v;
2279: }
2280: }
2281: return ($extrashow,\@customfields,\%customhash);
2282: }
2283:
2284: ######################################################################
2285: ######################################################################
2286:
2287: =pod
2288:
2289: =item &search_results_header()
2290:
2291: Output the proper html headers and javascript code to deal with different
2292: calling modes.
2293:
2294: Takes most inputs directly from %ENV, except $mode.
2295:
2296: =over 4
2297:
2298: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2299:
2300: =back
2301:
2302: The following environment variables are checked:
2303:
2304: =over 4
2305:
2306: =item 'form.catalogmode'
2307:
2308: Checked for 'interactive' and 'groupsearch'.
2309:
2310: =item 'form.mode'
2311:
2312: Checked for existance & 'edit' mode.
2313:
2314: =item 'form.form'
2315:
2316: Contains the name of the form that has the input fields to set
2317:
2318: =item 'form.element'
2319:
2320: the name of the input field to put the URL into
2321:
2322: =item 'form.titleelement'
2323:
2324: the name of the input field to put the title into
2325:
2326: =back
2327:
2328: =cut
2329:
2330: ######################################################################
2331: ######################################################################
2332: sub search_results_header {
2333: my ($importbutton,$closebutton) = @_;
2334: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2335: my $result = '';
2336: # output beginning of search page
2337: # conditional output of script functions dependent on the mode in
2338: # which the search was invoked
2339: if ($ENV{'form.catalogmode'} eq 'interactive'){
2340: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2341: $result.=<<SCRIPT;
2342: <script type="text/javascript">
2343: function select_data(title,url) {
2344: changeTitle(title);
2345: changeURL(url);
2346: parent.close();
2347: }
2348: function changeTitle(val) {
2349: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2350: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2351: }
2352: }
2353: function changeURL(val) {
2354: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2355: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2356: }
2357: }
2358: </script>
2359: SCRIPT
2360: } elsif ($ENV{'form.mode'} eq 'edit') {
2361: my $form = $ENV{'form.form'};
2362: my $element = $ENV{'form.element'};
2363: my $titleelement = $ENV{'form.titleelement'};
2364: my $changetitle;
2365: if (!$titleelement) {
2366: $changetitle='function changeTitle(val) {}';
2367: } else {
2368: $changetitle=<<END;
2369: function changeTitle(val) {
2370: if (parent.targetwin.document) {
2371: parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
2372: } else {
2373: var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
2374: alert("Unable to transfer data to "+url);
2375: }
2376: }
2377: END
2378: }
2379:
2380: $result.=<<SCRIPT;
2381: <script type="text/javascript">
2382: function select_data(title,url) {
2383: changeURL(url);
2384: changeTitle(title);
2385: parent.close();
2386: }
2387: $changetitle
2388: function changeURL(val) {
2389: if (parent.targetwin.document) {
2390: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2391: } else {
2392: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2393: alert("Unable to transfer data to "+url);
2394: }
2395: }
2396: </script>
2397: SCRIPT
2398: }
2399: }
2400: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2401: <script type="text/javascript">
2402: function queue(checkbox_num,val) {
2403: if (document.forms.results.returnvalues.length != "undefined" &&
2404: typeof(document.forms.results.returnvalues.length) == "number") {
2405: if (document.forms.results.returnvalues[checkbox_num].checked) {
2406: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2407: } else {
2408: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2409: }
2410: } else {
2411: if (document.forms.results.returnvalues.checked) {
2412: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2413: } else {
2414: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2415: }
2416: }
2417: }
2418: function select_group() {
2419: parent.window.location=
2420: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2421: parent.statusframe.document.forms.statusform.elements.Queue.value;
2422: }
2423: </script>
2424: SCRIPT
2425: $result.=<<END;
2426: </head>
2427: $bodytag
2428: <form name="results" method="post" action="" >
2429: <input type="hidden" name="Queue" value="" />
2430: $importbutton
2431: END
2432: return $result;
2433: }
2434:
2435: ######################################################################
2436: ######################################################################
2437: sub search_status_header {
2438: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2439: return <<ENDSTATUS;
2440: <html><head><title>Search Status</title></head>
2441: $bodytag
2442: <h3>Search Status</h3>
2443: Sending search request to LON-CAPA servers.<br />
2444: ENDSTATUS
2445: }
2446:
2447: sub results_link {
2448: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2449: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2450: my $results_link = $basic_link."&phase=results".
2451: "&pause=1"."&start=1";
2452: return $results_link;
2453: }
2454:
2455: ######################################################################
2456: ######################################################################
2457: sub print_frames_interface {
2458: my $r = shift;
2459: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2460: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2461: my $run_search_link = $basic_link."&phase=run_search";
2462: my $results_link = &results_link();
2463: my $result = <<"ENDFRAMES";
2464: <html>
2465: <head>
2466: <script>
2467: var targetwin = opener;
2468: var queue = '';
2469: </script>
2470: <title>LON-CAPA Digital Library Search Results</title>
2471: </head>
2472: <frameset rows="150,*">
2473: <frame name="statusframe" src="$run_search_link">
2474: <frame name="resultsframe" src="$results_link">
2475: </frameset>
2476: </html>
2477: ENDFRAMES
2478:
2479: $r->print($result);
2480: return;
2481: }
2482:
2483: ######################################################################
2484: ######################################################################
2485:
2486: =pod
2487:
2488: =item Metadata Viewing Functions
2489:
2490: Output is a HTML-ified string.
2491:
2492: Input arguments are title, author, subject, url, keywords, version,
2493: notes, short abstract, mime, language, creation date,
2494: last revision date, owner, copyright, hostname, and
2495: extra custom metadata to show.
2496:
2497: =over 4
2498:
2499: =item &detailed_citation_view()
2500:
2501: =cut
2502:
2503: ######################################################################
2504: ######################################################################
2505: sub detailed_citation_view {
2506: my ($prefix,%values) = @_;
2507: my $icon=&Apache::loncommon::icon($values{'url'});
2508: my $result=<<END;
2509: <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2510: target='search_preview'>$values{'title'}</a></b>
2511: <p>
2512: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2513:
2514: <b>Subject: </b> $values{'subject'}<br />
2515: <b>Keyword(s): </b> $values{'keywords'}<br />
2516: <b>Notes: </b> $values{'notes'}<br />
2517: <b>MIME Type: </b> $values{'mimetag'}<br />
2518: <b>Language: </b> $values{'language'}<br />
2519: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2520: </p>
2521: $values{'extrashow'}
2522: <p>
2523: $values{'shortabstract'}
2524: </p>
2525: <hr align='left' width='200' noshade />
2526: END
2527: return $result;
2528: }
2529:
2530: ######################################################################
2531: ######################################################################
2532:
2533: =pod
2534:
2535: =item &summary_view()
2536:
2537: =cut
2538: ######################################################################
2539: ######################################################################
2540: sub summary_view {
2541: my ($prefix,%values) = @_;
2542: my $icon=&Apache::loncommon::icon($values{'url'});
2543: my $result=<<END;
2544: $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2545: target='search_preview'>$values{'author'}</a><br />
2546: $values{'title'}<br />
2547: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2548: $values{'copyrighttag'}<br />
2549: $values{'extrashow'}
2550: </p>
2551: <hr align='left' width='200' noshade />
2552: END
2553: return $result;
2554: }
2555:
2556: ######################################################################
2557: ######################################################################
2558:
2559: =pod
2560:
2561: =item &compact_view()
2562:
2563: =cut
2564:
2565: ######################################################################
2566: ######################################################################
2567: sub compact_view {
2568: my ($prefix,%values) = @_;
2569: my $icon=&Apache::loncommon::icon($values{'url'});
2570: my $result=<<END;
2571: $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2572: $values{'title'}</a>
2573: <b>$values{'author'}</b><br />
2574: END
2575: return $result;
2576: }
2577:
2578:
2579: ######################################################################
2580: ######################################################################
2581:
2582: =pod
2583:
2584: =item &fielded_format_view()
2585:
2586: =cut
2587:
2588: ######################################################################
2589: ######################################################################
2590: sub fielded_format_view {
2591: my ($prefix,%values) = @_;
2592: my $icon=&Apache::loncommon::icon($values{'url'});
2593: my $result=<<END;
2594: $prefix <img src="$icon" />
2595: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2596: target='search_preview'>$values{'url'}</a>
2597: <br />
2598: <b>Title:</b> $values{'title'}<br />
2599: <b>Author(s):</b> $values{'author'}<br />
2600: <b>Subject:</b> $values{'subject'}<br />
2601: <b>Keyword(s):</b> $values{'keywords'}<br />
2602: <b>Notes:</b> $values{'notes'}<br />
2603: <b>MIME Type:</b> $values{'mimetag'}<br />
2604: <b>Language:</b> $values{'language'}<br />
2605: <b>Creation Date:</b> $values{'creationdate'}<br />
2606: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2607: <b>Publisher/Owner:</b> $values{'owner'}<br />
2608: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2609: <b>Repository Location:</b> $values{'hostname'}<br />
2610: <b>Abstract:</b> $values{'shortabstract'}<br />
2611: $values{'extrashow'}
2612: </p>
2613: <hr align='left' width='200' noshade />
2614: END
2615: return $result;
2616: }
2617:
2618: ######################################################################
2619: ######################################################################
2620:
2621: =pod
2622:
2623: =item &xml_sgml_view()
2624:
2625: =back
2626:
2627: =cut
2628:
2629: ######################################################################
2630: ######################################################################
2631: sub xml_sgml_view {
2632: my ($prefix,%values) = @_;
2633: my $result=<<END;
2634: $prefix
2635: <pre>
2636: <LonCapaResource>
2637: <url>$values{'url'}</url>
2638: <title>$values{'title'}</title>
2639: <author>$values{'author'}</author>
2640: <subject>$values{'subject'}</subject>
2641: <keywords>$values{'keywords'}</keywords>
2642: <notes>$values{'notes'}</notes>
2643: <mimeInfo>
2644: <mime>$values{'mime'}</mime>
2645: <mimetag>$values{'mimetag'}</mimetag>
2646: </mimeInfo>
2647: <languageInfo>
2648: <language>$values{'language'}</language>
2649: <languagetag>$values{'languagetag'}</languagetag>
2650: </languageInfo>
2651: <creationdate>$values{'creationdate'}</creationdate>
2652: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2653: <owner>$values{'owner'}</owner>
2654: <copyrightInfo>
2655: <copyright>$values{'copyright'}</copyright>
2656: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2657: </copyrightInfo>
2658: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2659: <shortabstract>$values{'shortabstract'}</shortabstract>
2660: </LonCapaResource>
2661: </pre>
2662: $values{'extrashow'}
2663: <hr align='left' width='200' noshade />
2664: END
2665: return $result;
2666: }
2667:
2668: ######################################################################
2669: ######################################################################
2670:
2671: =pod
2672:
2673: =item &filled() see if field is filled.
2674:
2675: =cut
2676:
2677: ######################################################################
2678: ######################################################################
2679: sub filled {
2680: my ($field)=@_;
2681: if ($field=~/\S/ && $field ne 'any') {
2682: return 1;
2683: } else {
2684: return 0;
2685: }
2686: }
2687:
2688: ######################################################################
2689: ######################################################################
2690:
2691: =pod
2692:
2693: =item &output_blank_field_error()
2694:
2695: Output a complete page that indicates the user has not filled in enough
2696: information to do a search.
2697:
2698: Inputs: $r (Apache request handle), $closebutton, $parms.
2699:
2700: Returns: nothing
2701:
2702: $parms is extra information to include in the 'Revise search request' link.
2703:
2704: =cut
2705:
2706: ######################################################################
2707: ######################################################################
2708: sub output_blank_field_error {
2709: my ($r,$closebutton,$parms,$hidden_fields)=@_;
2710: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2711: # make query information persistent to allow for subsequent revision
2712: $r->print(<<BEGINNING);
2713: <html>
2714: <head>
2715: <title>The LearningOnline Network with CAPA</title>
2716: BEGINNING
2717: $r->print(<<RESULTS);
2718: </head>
2719: $bodytag
2720: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2721: <h1>Search Catalog</h1>
2722: <form method="post" action="/adm/searchcat">
2723: $hidden_fields
2724: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2725: >Revise search request</a>
2726: $closebutton
2727: <hr />
2728: <h3>Unactionable search query.</h3>
2729: <p>
2730: You did not fill in enough information for the search to be started.
2731: You need to fill in relevant fields on the search page in order
2732: for a query to be processed.
2733: </p>
2734: </body>
2735: </html>
2736: RESULTS
2737: }
2738:
2739: ######################################################################
2740: ######################################################################
2741:
2742: =pod
2743:
2744: =item &output_date_error()
2745:
2746: Output a full html page with an error message.
2747:
2748: Inputs:
2749:
2750: $r, the request pointer.
2751: $message, the error message for the user.
2752: $closebutton, the specialized close button needed for groupsearch.
2753:
2754: =cut
2755:
2756: ######################################################################
2757: ######################################################################
2758: sub output_date_error {
2759: my ($r,$message,$closebutton,$hidden_fields)=@_;
2760: # make query information persistent to allow for subsequent revision
2761: my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
2762: $r->print(<<RESULTS);
2763: <html>
2764: <head>
2765: <title>The LearningOnline Network with CAPA</title>
2766: </head>
2767: $bodytag
2768: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2769: <h1>Search Catalog</h1>
2770: <form method="post" action="/adm/searchcat">
2771: $hidden_fields
2772: <input type='button' value='Revise search request'
2773: onClick='this.form.submit();' />
2774: $closebutton
2775: <hr />
2776: <h3>Error</h3>
2777: <p>
2778: $message
2779: </p>
2780: </body>
2781: </html>
2782: RESULTS
2783: }
2784:
2785: ######################################################################
2786: ######################################################################
2787:
2788: =pod
2789:
2790: =item &start_fresh_session()
2791:
2792: Cleans the global %groupsearch_db by removing all fields which begin with
2793: 'pre_' or 'store'.
2794:
2795: =cut
2796:
2797: ######################################################################
2798: ######################################################################
2799: sub start_fresh_session {
2800: delete $groupsearch_db{'mode_catalog'};
2801: foreach (keys %groupsearch_db) {
2802: if ($_ =~ /^pre_/) {
2803: delete $groupsearch_db{$_};
2804: }
2805: if ($_ =~ /^store/) {
2806: delete $groupsearch_db{$_};
2807: }
2808: }
2809: }
2810:
2811: 1;
2812:
2813: sub cleanup {
2814: if (tied(%groupsearch_db)) {
2815: unless (untie(%groupsearch_db)) {
2816: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2817: }
2818: }
2819: &untiehash();
2820: &Apache::lonmysql::disconnect_from_db();
2821: }
2822:
2823: __END__
2824:
2825: =pod
2826:
2827: =back
2828:
2829: =cut
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