1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.152 2002/08/07 12:37:16 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 seperate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: ###############################################################################
63: ## ##
64: ## ORGANIZATION OF THIS PERL MODULE ##
65: ## ##
66: ## 1. Modules used by this module ##
67: ## 2. Variables used throughout the module ##
68: ## 3. handler subroutine called via Apache and mod_perl ##
69: ## 4. Other subroutines ##
70: ## ##
71: ###############################################################################
72:
73: package Apache::lonsearchcat;
74:
75: # ------------------------------------------------- modules used by this module
76: use strict;
77: use Apache::Constants qw(:common);
78: use Apache::lonnet();
79: use Apache::File();
80: use CGI qw(:standard);
81: use Text::Query;
82: use DBI;
83: use GDBM_File;
84: use Apache::loncommon();
85: use Apache::lonmysql();
86:
87: # ---------------------------------------- variables used throughout the module
88:
89: ######################################################################
90: ######################################################################
91:
92: =pod
93:
94: =item Global variables
95:
96: =over 4
97:
98: =item $importbutton
99:
100: button to take the select results and go to group sorting
101:
102: =item %groupsearch_db
103:
104: Database hash used to save values for the groupsearch RAT interface.
105:
106: =item $diropendb
107:
108: The full path to the (temporary) search database file. This is set and
109: used in &handler() and is also used in &output_results().
110:
111: =item %Views
112:
113: Hash which associates an output view description with the function
114: that produces it. Adding a new view type should be as easy as
115: adding a line to the definition of this hash and making sure the function
116: takes the proper parameters.
117:
118: =back
119:
120: =cut
121:
122: ######################################################################
123: ######################################################################
124:
125: # -- dynamically rendered interface components
126: my $importbutton; # button to take the selected results and go to group sorting
127:
128: # -- miscellaneous variables
129: my %groupsearch_db; # database hash
130: my $diropendb = ""; # db file
131: # View Description Function Pointer
132: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
133: "Summary View" => \&summary_view,
134: "Fielded Format" => \&fielded_format_view,
135: "XML/SGML" => \&xml_sgml_view,
136: "Compact View" => \&compact_view);
137: my %persistent_db;
138: my $hidden_fields;
139: ######################################################################
140: ######################################################################
141:
142: =pod
143:
144: =item &handler() - main handler invoked by httpd child
145:
146: =item Variables
147:
148: =over 4
149:
150: =item $hidden
151:
152: holds 'hidden' html forms
153:
154: =item $scrout
155:
156: string that holds portions of the screen output
157:
158: =back
159:
160: =cut
161:
162: ######################################################################
163: ######################################################################
164: sub handler {
165: my $r = shift;
166: #
167: my $closebutton; # button that closes the search window
168: # This button is different for the RAT compared to
169: # normal invocation.
170: #
171: $r->content_type('text/html');
172: $r->send_http_header;
173: return OK if $r->header_only;
174: ##
175: ## Pick up form fields passed in the links.
176: ##
177: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
178: ['catalogmode','launch','acts','mode','form','element','pause',
179: 'phase','persistent_db_id','table','start','show']);
180: ##
181: ## The following is a trick - we wait a few seconds if asked to so
182: ## the daemon running the search can get ahead of the daemon
183: ## printing the results. We only need (theoretically) to do
184: ## this once, so the pause indicator is deleted
185: ##
186: if (exists($ENV{'form.pause'})) {
187: sleep(3);
188: delete($ENV{'form.pause'});
189: }
190: ##
191: ## Initialize global variables
192: ##
193: my $domain = $r->dir_config('lonDefDomain');
194: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
195: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
196: #
197: # set the name of the persistent database
198: # $ENV{'form.persistent_db_id'} can only have digits in it.
199: if (! exists($ENV{'form.persistent_db_id'}) ||
200: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
201: ($ENV{'form.launch'} eq '1')) {
202: $ENV{'form.persistent_db_id'} = time;
203: }
204: my $persistent_db_file = "/home/httpd/perl/tmp/".
205: &Apache::lonnet::escape($domain).
206: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
207: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
208: ##
209: if (! &get_persistent_form_data($persistent_db_file)) {
210: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
211: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
212: "from $persistent_db_file");
213: $r->print(<<END);
214: <html>
215: <head><title>LON-CAPA Search Error</title></head>
216: <body>
217: We were unable to retrieve data describing your search. This is a serious
218: error and has been logged. Please alert your LON-CAPA administrator.
219: </body>
220: </html>
221: END
222: return OK;
223: }
224: }
225: ##
226: ## Clear out old values from groupsearch database
227: ##
228: untie %groupsearch_db if (tied(%groupsearch_db));
229: if ($ENV{'form.launch'} eq '1' &&
230: ($ENV{'form.catalogmode'} eq 'groupsearch') &&
231: ($ENV{'form.phase'} eq 'results')) {
232: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
233: &start_fresh_session();
234: untie %groupsearch_db;
235: } else {
236: $r->print('<html><head></head><body>Unable to tie hash to db '.
237: 'file</body></html>');
238: return OK;
239: }
240: }
241: ##
242: ## Configure hidden fields
243: ##
244: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
245: $ENV{'form.persistent_db_id'}.'" />'."\n";
246: if (exists($ENV{'form.catalogmode'})) {
247: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
248: $ENV{'form.catalogmode'}.'" />'."\n";
249: }
250: if (exists($ENV{'form.form'})) {
251: $hidden_fields .= '<input type="hidden" name="form" value="'.
252: $ENV{'form.form'}.'" />'."\n";
253: }
254: if (exists($ENV{'form.element'})) {
255: $hidden_fields .= '<input type="hidden" name="element" value="'.
256: $ENV{'form.element'}.'" />'."\n";
257: }
258: if (exists($ENV{'form.mode'})) {
259: $hidden_fields .= '<input type="hidden" name="mode" value="'.
260: $ENV{'form.mode'}.'" />'."\n";
261: }
262: ##
263: ## Configure dynamic components of interface
264: ##
265: if ($ENV{'form.catalogmode'} eq 'interactive') {
266: $closebutton="<input type='button' name='close' value='CLOSE' ";
267: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
268: $closebutton .="onClick='parent.close()'";
269: } else {
270: $closebutton .="onClick='self.close()'";
271: }
272: $closebutton .=">\n";
273: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
274: $closebutton="<input type='button' name='close' value='CLOSE' ";
275: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
276: $closebutton .="onClick='parent.close()'";
277: } else {
278: $closebutton .="onClick='self.close()'";
279: }
280: $closebutton .= ">";
281: $importbutton=<<END;
282: <input type='button' name='import' value='IMPORT'
283: onClick='javascript:select_group()'>
284: END
285: } else {
286: $closebutton = '';
287: $importbutton = '';
288: }
289: ##
290: ## Sanity checks on form elements
291: ##
292: if (!defined($ENV{'form.viewselect'})) {
293: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
294: ($ENV{'form.catalogmode'} eq 'interactive')) {
295: $ENV{'form.viewselect'} ="Compact View";
296: } else {
297: $ENV{'form.viewselect'} ="Detailed Citation View";
298: }
299: }
300: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
301: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
302: ##
303: ## Switch on the phase
304: ##
305: if ($ENV{'form.phase'} eq 'disp_basic') {
306: &print_basic_search_form($r,$closebutton);
307: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
308: &print_advanced_search_form($r,$closebutton);
309: } elsif ($ENV{'form.phase'} eq 'results') {
310: &display_results($r,$importbutton,$closebutton);
311: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
312: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
313: &get_persistent_data($persistent_db_file,
314: ['query','customquery','customshow',
315: 'libraries','pretty_string']);
316: if ($ENV{'form.phase'} eq 'sort') {
317: &print_sort_form($r,$pretty_string);
318: } elsif ($ENV{'form.phase'} eq 'run_search') {
319: &run_search($r,$query,$customquery,$customshow,
320: $libraries,$pretty_string);
321: }
322: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
323: ($ENV{'form.phase'} eq 'adv_search')) {
324: $ENV{'form.searchmode'} = 'basic';
325: if ($ENV{'form.phase'} eq 'adv_search') {
326: $ENV{'form.searchmode'} = 'advanced';
327: }
328: # Set up table
329: if (! defined(&create_results_table())) {
330: $r->print(<<END);
331: <html><head><title>Search Error</title></head>
332: <body>
333: Unable to create table in which to store search results.
334: The search has been aborted.
335: </body>
336: </html>
337: END
338: return OK;
339: }
340: delete($ENV{'form.launch'});
341: if (! &make_form_data_persistent($r,$persistent_db_file)) {
342: $r->print(<<END);
343: <html><head><title>Search Error</title></head>
344: <body>
345: Unable to properly store search information. The search has been aborted.
346: </body>
347: </html>
348: END
349: return OK;
350: }
351: #
352: # We are running a search
353: my ($query,$customquery,$customshow,$libraries) =
354: (undef,undef,undef,undef);
355: my $pretty_string;
356: if ($ENV{'form.phase'} eq 'basic_search') {
357: ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
358: } else { # Advanced search
359: ($query,$customquery,$customshow,$libraries,$pretty_string)
360: = &parse_advanced_search($r,$closebutton);
361: return OK if (! defined($query));
362: }
363: &make_persistent({ query => $query,
364: customquery => $customquery,
365: customshow => $customshow,
366: libraries => $libraries,
367: pretty_string => $pretty_string },
368: $persistent_db_file);
369: ##
370: ## Print out the frames interface
371: ##
372: &print_frames_interface($r);
373: }
374: return OK;
375: }
376:
377: ######################################################################
378: ######################################################################
379:
380: =pod
381:
382: =item &print_basic_search_form()
383:
384: Returns a scalar which holds html for the basic search form.
385:
386: =cut
387:
388: ######################################################################
389: ######################################################################
390:
391: sub print_basic_search_form{
392: my ($r,$closebutton) = @_;
393: my $scrout=<<"ENDDOCUMENT";
394: <html>
395: <head>
396: <title>The LearningOnline Network with CAPA</title>
397: <script type="text/javascript">
398: function openhelp(val) {
399: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
400: 'scrollbars=1,width=600,height=300');
401: openhelpwin.focus();
402: }
403: </script>
404: </head>
405: <body bgcolor="#FFFFFF">
406: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
407: <h1>Search Catalog</h1>
408: <form method="post" action="/adm/searchcat">
409: <input type="hidden" name="phase" value="basic_search" />
410: $hidden_fields
411: <h3>Basic Search</h3>
412: <p>
413: Enter terms or phrases separated by AND, OR, or NOT
414: then press SEARCH below.
415: </p>
416: <p>
417: <table>
418: <tr><td>
419: ENDDOCUMENT
420: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
421: ' ';
422: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
423: $scrout.=<<END;
424: </td><td><a href="/adm/searchcat?phase=disp_adv">Advanced Search</a></td></tr>
425: <tr><td>$checkbox use related words</td><td></td></tr>
426: </table>
427: </p>
428: <p>
429: <input type="submit" name="basicsubmit" value='SEARCH' />
430: $closebutton
431: END
432: $scrout.=&selectbox(undef,'viewselect',
433: $ENV{'form.viewselect'},
434: undef,undef,undef,
435: sort(keys(%Views)));
436: $scrout.=&selectbox(undef,'show',
437: $ENV{'form.show'},
438: undef,undef,undef,
439: (10,20,50,100));
440: $scrout.=<<ENDDOCUMENT;
441: per page.
442: </p>
443: </form>
444: </body>
445: </html>
446: ENDDOCUMENT
447: $r->print($scrout);
448: return;
449: }
450: ######################################################################
451: ######################################################################
452:
453: =pod
454:
455: =item &advanced_search_form()
456:
457: Returns a scalar which holds html for the advanced search form.
458:
459: =cut
460:
461: ######################################################################
462: ######################################################################
463:
464: sub print_advanced_search_form{
465: my ($r,$closebutton) = @_;
466: my $advanced_buttons = <<"END";
467: <p>
468: <input type="submit" name="advancedsubmit" value='SEARCH' />
469: <input type="reset" name="reset" value='RESET' />
470: $closebutton
471: <input type="button" value="HELP" onClick="openhelp()" />
472: </p>
473: END
474: if (!defined($ENV{'form.viewselect'})) {
475: $ENV{'form.viewselect'} ="Detailed Citation View";
476: }
477: my $scrout=<<"ENDHEADER";
478: <html>
479: <head>
480: <title>The LearningOnline Network with CAPA</title>
481: <script type="text/javascript">
482: function openhelp(val) {
483: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
484: 'scrollbars=1,width=600,height=300');
485: openhelpwin.focus();
486: }
487: </script>
488: </head>
489: <body bgcolor="#FFFFFF">
490: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
491: <h1>Advanced Catalog Search</h1>
492: <hr />
493: Enter terms or phrases separated by search operators
494: such as AND, OR, or NOT.<br />
495: <form method="post" action="/adm/searchcat">
496: $advanced_buttons
497: $hidden_fields
498: <input type="hidden" name="phase" value="adv_search" />
499: <table>
500: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
501: <td>
502: ENDHEADER
503: $scrout.=&selectbox(undef,'viewselect',
504: $ENV{'form.viewselect'},
505: undef,undef,undef,
506: sort(keys(%Views)));
507: $scrout.=' ';
508: $scrout.=&selectbox(undef,'show',
509: $ENV{'form.show'},
510: undef,undef,undef,
511: (10,20,50,100));
512: $scrout.=' '.
513: '<font color="#800000" face="helvetica">Per Page</font>';
514: $scrout.="</td><td>Related<br />Words</td></tr>\n";
515: $scrout.=&searchphrasefield_with_related('title', 'title' ,
516: $ENV{'form.title'});
517: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
518: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
519: $ENV{'form.subject'});
520: $scrout.=&searchphrasefield_with_related('keywords','keywords',
521: $ENV{'form.keywords'});
522: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
523: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
524: $ENV{'form.notes'});
525: $scrout.=&searchphrasefield_with_related('abstract','abstract',
526: $ENV{'form.abstract'});
527: # Hack - an empty table row.
528: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
529: $scrout.=&searchphrasefield('file<br />extension','mime',
530: $ENV{'form.mime'});
531: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
532: $scrout.=&searchphrasefield('publisher<br />owner','owner',
533: $ENV{'form.owner'});
534: $scrout.="</table>\n";
535: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
536: $scrout.=&selectbox('File Category','category',
537: $ENV{'form.category'},
538: 'any','Any category',
539: undef,
540: (&Apache::loncommon::filecategories()));
541: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
542: #----------------------------------------------------------------
543: # Allow restriction to multiple domains.
544: # I make the crazy assumption that there will never be a domain 'any'.
545: #
546: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
547: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
548: : ($ENV{'form.domains'}) );
549: my %domain_hash = ();
550: foreach (@allowed_domains) {
551: $domain_hash{$_}++;
552: }
553: my @domains =&Apache::loncommon::get_domains();
554: # adjust the size of the select box
555: my $size = 4;
556: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
557: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
558: 'DOMAINS</b></font><br />'.
559: '<select name="domains" size="'.$size.'" multiple>'."\n".
560: '<option name="any" value="any" '.
561: ($domain_hash{'any'}? 'selected ' :'').
562: '>all domains</option>'."\n";
563: foreach my $dom (sort @domains) {
564: $scrout.="<option name=\"$dom\" ".
565: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
566: }
567: $scrout.="</select>\n";
568: #----------------------------------------------------------------
569: $scrout.=&selectbox('Limit by language','language',
570: $ENV{'form.language'},'any','Any Language',
571: \&{Apache::loncommon::languagedescription},
572: (&Apache::loncommon::languageids),
573: );
574: # ------------------------------------------------ Compute date selection boxes
575: $scrout.=<<CREATIONDATESTART;
576: <p>
577: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
578: </font>
579: <br />
580: between:
581: CREATIONDATESTART
582: $scrout.=&dateboxes('creationdatestart',1,1,1976,
583: $ENV{'form.creationdatestart_month'},
584: $ENV{'form.creationdatestart_day'},
585: $ENV{'form.creationdatestart_year'},
586: );
587: $scrout.="and:\n";
588: $scrout.=&dateboxes('creationdateend',12,31,2051,
589: $ENV{'form.creationdateend_month'},
590: $ENV{'form.creationdateend_day'},
591: $ENV{'form.creationdateend_year'},
592: );
593: $scrout.="</p>";
594: $scrout.=<<LASTREVISIONDATESTART;
595: <p>
596: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
597: </b></font>
598: <br />between:
599: LASTREVISIONDATESTART
600: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
601: $ENV{'form.lastrevisiondatestart_month'},
602: $ENV{'form.lastrevisiondatestart_day'},
603: $ENV{'form.lastrevisiondatestart_year'},
604: );
605: $scrout.=<<LASTREVISIONDATEEND;
606: and:
607: LASTREVISIONDATEEND
608: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
609: $ENV{'form.lastrevisiondateend_month'},
610: $ENV{'form.lastrevisiondateend_day'},
611: $ENV{'form.lastrevisiondateend_year'},
612: );
613: $scrout.='</p>';
614: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
615: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
616: $ENV{'form.copyright'},
617: 'any','Any copyright/distribution',
618: \&{Apache::loncommon::copyrightdescription},
619: (&Apache::loncommon::copyrightids),
620: );
621: # ------------------------------------------- Compute customized metadata field
622: # $scrout.=<<CUSTOMMETADATA;
623: #<p>
624: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
625: #</font>
626: #For resource-specific metadata, enter in an expression in the form of
627: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
628: #<b>Example:</b> grandmother=75 OR grandfather=85
629: #<br />
630: #CUSTOMMETADATA
631: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
632: # $scrout.=<<CUSTOMSHOW;
633: #<p>
634: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
635: #</font>
636: #Enter in a space-separated list of special metadata fields to show
637: #in a fielded listing for each record result.
638: #<br />
639: #CUSTOMSHOW
640: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
641: $scrout.=<<ENDDOCUMENT;
642: $advanced_buttons
643: </form>
644: </body>
645: </html>
646: ENDDOCUMENT
647: $r->print($scrout);
648: return;
649: }
650:
651: ######################################################################
652: ######################################################################
653:
654: =pod
655:
656: =item &get_persistent_form_data
657:
658: Inputs: filename of database
659:
660: Outputs: returns undef on database errors.
661:
662: This function is the reverse of &make_persistent() for form data.
663: Retrieve persistent data from %persistent_db. Retrieved items will have their
664: values unescaped. If a form value already exists in $ENV, it will not be
665: overwritten. Form values that are array references may have values appended
666: to them.
667:
668: =cut
669:
670: ######################################################################
671: ######################################################################
672: sub get_persistent_form_data {
673: my $filename = shift;
674: return 0 if (! -e $filename);
675: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
676: &GDBM_READER(),0640));
677: #
678: # These make sure we do not get array references printed out as 'values'.
679: my %arrays_allowed = ('form.category'=>1,'form.domains'=>1);
680: #
681: # Loop through the keys, looking for 'form.'
682: foreach my $name (keys(%persistent_db)) {
683: next if ($name !~ /^form./);
684: next if (exists($ENV{$name}));
685: my @values = map {
686: &Apache::lonnet::unescape($_);
687: } split(',',$persistent_db{$name});
688: next if (@values <1);
689: if ($arrays_allowed{$name}) {
690: $ENV{$name} = [@values];
691: } else {
692: $ENV{$name} = $values[0] if ($values[0]);
693: }
694: }
695: untie (%persistent_db);
696: return 1;
697: }
698: ######################################################################
699: ######################################################################
700:
701: =pod
702:
703: =item &get_persistent_data
704:
705: Inputs: filename of database, ref to array of values to recover.
706:
707: Outputs: array of values. Returns undef on error.
708:
709: This function is the reverse of &make_persistent();
710: Retrieve persistent data from %persistent_db. Retrieved items will have their
711: values unescaped. If the item contains commas (before unescaping), the
712: returned value will be an array pointer.
713:
714: =cut
715:
716: ######################################################################
717: ######################################################################
718: sub get_persistent_data {
719: my $filename = shift;
720: my @Vars = @{shift()};
721: my @Values; # Return array
722: return undef if (! -e $filename);
723: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
724: &GDBM_READER(),0640));
725: foreach my $name (@Vars) {
726: if (! exists($persistent_db{$name})) {
727: push @Values, undef;
728: next;
729: }
730: my @values = map {
731: &Apache::lonnet::unescape($_);
732: } split(',',$persistent_db{$name});
733: if (@values <= 1) {
734: push @Values,$values[0];
735: } else {
736: push @Values,\@values;
737: }
738: }
739: untie (%persistent_db);
740: return @Values;
741: }
742:
743: ######################################################################
744: ######################################################################
745:
746: =pod
747:
748: =item &make_persistent()
749:
750: Inputs: Hash of values to save, filename of persistent database.
751:
752: Store variables away to the %persistent_db.
753: Values will be escaped. Values that are array pointers will have their
754: elements escaped and concatenated in a comma seperated string.
755:
756: =cut
757:
758: ######################################################################
759: ######################################################################
760: sub make_persistent {
761: my %save = %{shift()};
762: my $filename = shift;
763: return undef if (! tie(%persistent_db,'GDBM_File',
764: $filename,&GDBM_WRCREAT(),0640));
765: foreach my $name (keys(%save)) {
766: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
767: # We handle array references, but not recursively.
768: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
769: $persistent_db{$name} = $store;
770: }
771: untie(%persistent_db);
772: return 1;
773: }
774:
775: ######################################################################
776: ######################################################################
777:
778: =pod
779:
780: =item &make_form_data_persistent()
781:
782: Inputs: filename of persistent database.
783:
784: Store most form variables away to the %persistent_db.
785: Values will be escaped. Values that are array pointers will have their
786: elements escaped and concatenated in a comma seperated string.
787:
788: =cut
789:
790: ######################################################################
791: ######################################################################
792: sub make_form_data_persistent {
793: my $r = shift;
794: my $filename = shift;
795: my %save;
796: foreach (keys(%ENV)) {
797: next if (!/^form/ || /submit/);
798: $save{$_} = $ENV{$_};
799: }
800: return &make_persistent(\%save,$filename);
801: }
802:
803: ######################################################################
804: # HTML form building functions #
805: ######################################################################
806:
807: =pod
808:
809: =item HTML form building functions
810:
811: =over 4
812:
813: =cut
814:
815: ###############################################
816: ###############################################
817:
818: =pod
819:
820: =item &simpletextfield()
821:
822: Inputs: $name,$value,$size
823:
824: Returns a text input field with the given name, value, and size.
825: If size is not specified, a value of 20 is used.
826:
827: =cut
828:
829: ###############################################
830: ###############################################
831:
832: sub simpletextfield {
833: my ($name,$value,$size)=@_;
834: $size = 20 if (! defined($size));
835: return '<input type="text" name="'.$name.
836: '" size="'.$size.'" value="'.$value.'" />';
837: }
838:
839: ###############################################
840: ###############################################
841:
842: =pod
843:
844: =item &simplecheckbox()
845:
846: Inputs: $name,$value
847:
848: Returns a simple check box with the given $name.
849: If $value eq 'on' the box is checked.
850:
851: =cut
852:
853: ###############################################
854: ###############################################
855:
856: sub simplecheckbox {
857: my ($name,$value)=@_;
858: my $checked='';
859: $checked="checked" if $value eq 'on';
860: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
861: }
862:
863: ###############################################
864: ###############################################
865:
866: =pod
867:
868: =item &fieldtitle()
869:
870: Input: $title
871:
872: Returns a scalar with html which will display $title as a search
873: field heading.
874:
875: =cut
876:
877: ###############################################
878: ###############################################
879:
880: sub fieldtitle {
881: my $title = uc(shift());
882: return '<font color="#800000" face="helvetica"><b>'.$title.
883: ': </b></font>';
884: }
885:
886: ###############################################
887: ###############################################
888:
889: =pod
890:
891: =item &searchphrasefield()
892:
893: Inputs: $title,$name,$value
894:
895: Returns html for a title line and an input field for entering search terms.
896: The entry field (which is where the $name and $value are used) is a 50 column
897: simpletextfield. The html returned is for a row in a three column table.
898:
899: =cut
900:
901: ###############################################
902: ###############################################
903:
904: sub searchphrasefield {
905: my ($title,$name,$value)=@_;
906: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
907: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
908: }
909:
910: ###############################################
911: ###############################################
912:
913: =pod
914:
915: =item &searchphrasefield_with_related()
916:
917: Inputs: $title,$name,$value
918:
919: Returns html for a title line and an input field for entering search terms
920: and a check box for 'related words'. The entry field (which is where the
921: $name and $value are used) is a 50 column simpletextfield. The name of
922: the related words checkbox is "$name_related".
923:
924: =cut
925:
926: ###############################################
927: ###############################################
928:
929: sub searchphrasefield_with_related {
930: my ($title,$name,$value)=@_;
931: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
932: &simpletextfield($name,$value,50).'</td><td align="center"> '.
933: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
934: " </td></tr>\n";
935: }
936:
937: ###############################################
938: ###############################################
939:
940: =pod
941:
942: =item &dateboxes()
943:
944: Returns html selection form elements for the specification of
945: the day, month, and year.
946:
947: =cut
948:
949: ###############################################
950: ###############################################
951:
952: sub dateboxes {
953: my ($name,$defaultmonth,$defaultday,$defaultyear,
954: $currentmonth,$currentday,$currentyear)=@_;
955: ($defaultmonth,$defaultday,$defaultyear)=('','','');
956: #
957: # Day
958: my $day=<<END;
959: <select name="${name}_day">
960: <option value='$defaultday'> </option>
961: END
962: for (my $i = 1; $i<=31; $i++) {
963: $day.="<option value=\"$i\">$i</option>\n";
964: }
965: $day.="</select>\n";
966: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
967: #
968: # Month
969: my $month=<<END;
970: <select name="${name}_month">
971: <option value='$defaultmonth'> </option>
972: END
973: my $i = 1;
974: foreach (qw/January February March April May June
975: July August September October November December /){
976: $month .="<option value=\"$i\">$_</option>\n";
977: $i++;
978: }
979: $month.="</select>\n";
980: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
981: #
982: # Year (obviously)
983: my $year=<<END;
984: <select name="${name}_year">
985: <option value='$defaultyear'> </option>
986: END
987: my $maxyear = 2051;
988: for (my $i = 1976; $i<=$maxyear; $i++) {
989: $year.="<option value=\"$i\">$i</option>\n";
990: }
991: $year.="</select>\n";
992: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
993: return "$month$day$year";
994: }
995:
996: ###############################################
997: ###############################################
998:
999: =pod
1000:
1001: =item &selectbox()
1002:
1003: Returns a scalar containing an html <select> form.
1004:
1005: Inputs:
1006:
1007: =over 4
1008:
1009: =item $title
1010:
1011: Printed above the select box, in uppercase. If undefined, only a select
1012: box will be returned, with no additional html.
1013:
1014: =item $name
1015:
1016: The name element of the <select> tag.
1017:
1018: =item $default
1019:
1020: The default value of the form. Can be $anyvalue, or in @idlist.
1021:
1022: =item $anyvalue
1023:
1024: The <option value="..."> used to indicate a default of
1025: none of the values. Can be undef.
1026:
1027: =item $anytag
1028:
1029: The text associate with $anyvalue above.
1030:
1031: =item $functionref
1032:
1033: Each element in @idlist will be passed as a parameter
1034: to the function referenced here. The return value of the function should
1035: be a scalar description of the items. If this value is undefined the
1036: description of each item in @idlist will be the item name.
1037:
1038: =item @idlist
1039:
1040: The items to be selected from. One of these or $anyvalue will be the
1041: value returned by the form element, $ENV{form.$name}.
1042:
1043: =back
1044:
1045: =cut
1046:
1047: ###############################################
1048:
1049: sub selectbox {
1050: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
1051: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
1052: my $selout='';
1053: if (defined($title)) {
1054: my $uctitle=uc($title);
1055: $selout="\n".'<p><font color="#800000" face="helvetica">'.
1056: '<b>'.$uctitle.': </b></font>';
1057: }
1058: $selout .= '<select name="'.$name.'">';
1059: unshift @idlist,$anyvalue if (defined($anyvalue));
1060: foreach (@idlist) {
1061: $selout.='<option value="'.$_.'"';
1062: if ($_ eq $default and !/^any$/) {
1063: $selout.=' selected >'.&{$functionref}($_).'</option>';
1064: }
1065: elsif ($_ eq $default and /^$anyvalue$/) {
1066: $selout.=' selected >'.$anytag.'</option>';
1067: }
1068: else {$selout.='>'.&{$functionref}($_).'</option>';}
1069: }
1070: return $selout.'</select>'.(defined($title)?'</p>':' ');
1071: }
1072:
1073: ######################################################################
1074: # End of HTML form building functions #
1075: ######################################################################
1076:
1077: =pod
1078:
1079: =back
1080:
1081: =cut
1082:
1083:
1084: ######################################################################
1085: ######################################################################
1086:
1087: =pod
1088:
1089: =item &parse_advanced_search()
1090:
1091: Parse advanced search form and return the following:
1092:
1093: =over 4
1094:
1095: =item $query Scalar containing an SQL query.
1096:
1097: =item $customquery Scalar containing a custom query.
1098:
1099: =item $customshow Scalar containing commands to show custom metadata.
1100:
1101: =item $libraries_to_query Reference to array of domains to search.
1102:
1103: =back
1104:
1105: =cut
1106:
1107: ######################################################################
1108: ######################################################################
1109: sub parse_advanced_search {
1110: my ($r,$closebutton)=@_;
1111: my $fillflag=0;
1112: my $pretty_search_string = "<br />\n";
1113: # Clean up fields for safety
1114: for my $field ('title','author','subject','keywords','url','version',
1115: 'creationdatestart_month','creationdatestart_day',
1116: 'creationdatestart_year','creationdateend_month',
1117: 'creationdateend_day','creationdateend_year',
1118: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1119: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1120: 'lastrevisiondateend_day','lastrevisiondateend_year',
1121: 'notes','abstract','mime','language','owner',
1122: 'custommetadata','customshow','category') {
1123: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1124: }
1125: foreach ('mode','form','element') {
1126: # is this required? Hmmm.
1127: next unless (exists($ENV{"form.$_"}));
1128: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1129: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1130: }
1131: # Preprocess the category form element.
1132: $ENV{'form.category'} = 'any' if (ref($ENV{'form.category'}));
1133: if ($ENV{'form.category'} ne 'any') {
1134: my @extensions = &Apache::loncommon::filecategorytypes
1135: ($ENV{'form.category'});
1136: $ENV{'form.mime'} = join ' OR ',@extensions;
1137: }
1138: # Check to see if enough information was filled in
1139: for my $field ('title','author','subject','keywords','url','version',
1140: 'notes','abstract','mime','language','owner',
1141: 'custommetadata') {
1142: if (&filled($ENV{"form.$field"})) {
1143: $fillflag++;
1144: }
1145: }
1146: unless ($fillflag) {
1147: &output_blank_field_error($r,$closebutton,'phase=disp_adv');
1148: return ;
1149: }
1150: # Turn the form input into a SQL-based query
1151: my $query='';
1152: my @queries;
1153: my $font = '<font color="#800000" face="helvetica">';
1154: # Evaluate logical expression AND/OR/NOT phrase fields.
1155: foreach my $field ('title','author','subject','notes','abstract','url',
1156: 'keywords','version','owner','mime') {
1157: if ($ENV{'form.'.$field}) {
1158: my $searchphrase = $ENV{'form.'.$field};
1159: $pretty_search_string .= $font."$field</font> contains <b>".
1160: $searchphrase."</b>";
1161: if ($ENV{'form.'.$field.'_related'}) {
1162: my @New_Words;
1163: ($searchphrase,@New_Words) = &related_version($searchphrase);
1164: if (@New_Words) {
1165: $pretty_search_string .= " with related words: ".
1166: "<b>@New_Words</b>.";
1167: } else {
1168: $pretty_search_string .= " with no related words.";
1169: }
1170: }
1171: $pretty_search_string .= "<br />\n";
1172: push @queries,&build_SQL_query($field,$searchphrase);
1173: }
1174: }
1175: # I dislike the hack below.
1176: if ($ENV{'form.category'}) {
1177: $ENV{'form.mime'}='';
1178: }
1179: # Evaluate option lists
1180: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1181: push @queries,"(language like \"$ENV{'form.language'}\")";
1182: $pretty_search_string.=$font."language</font>= ".
1183: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1184: "<br />\n";
1185: }
1186: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1187: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1188: $pretty_search_string.=$font."copyright</font> = ".
1189: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1190: "<br \>\n";
1191: }
1192: #
1193: # Evaluate date windows
1194: my $datequery=&build_date_queries(
1195: $ENV{'form.creationdatestart_month'},
1196: $ENV{'form.creationdatestart_day'},
1197: $ENV{'form.creationdatestart_year'},
1198: $ENV{'form.creationdateend_month'},
1199: $ENV{'form.creationdateend_day'},
1200: $ENV{'form.creationdateend_year'},
1201: $ENV{'form.lastrevisiondatestart_month'},
1202: $ENV{'form.lastrevisiondatestart_day'},
1203: $ENV{'form.lastrevisiondatestart_year'},
1204: $ENV{'form.lastrevisiondateend_month'},
1205: $ENV{'form.lastrevisiondateend_day'},
1206: $ENV{'form.lastrevisiondateend_year'},
1207: );
1208: # Test to see if date windows are legitimate
1209: if ($datequery=~/^Incorrect/) {
1210: &output_date_error($r,$datequery,$closebutton);
1211: return ;
1212: } elsif ($datequery) {
1213: # Here is where you would set up pretty_search_string to output
1214: # date query information.
1215: push @queries,$datequery;
1216: }
1217: # Process form information for custom metadata querying
1218: my $customquery=undef;
1219: # if ($ENV{'form.custommetadata'}) {
1220: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1221: # $ENV{'form.custommetadata'}."</b><br />\n";
1222: # $customquery=&build_custommetadata_query('custommetadata',
1223: # $ENV{'form.custommetadata'});
1224: # }
1225: my $customshow=undef;
1226: # if ($ENV{'form.customshow'}) {
1227: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1228: # $ENV{'form.customshow'}."</b><br />\n";
1229: # $customshow=$ENV{'form.customshow'};
1230: # $customshow=~s/[^\w\s]//g;
1231: # my @fields=split(/\s+/,$customshow);
1232: # $customshow=join(" ",@fields);
1233: # }
1234: ## ---------------------------------------------------------------
1235: ## Deal with restrictions to given domains
1236: ##
1237: my $libraries_to_query = undef;
1238: # $ENV{'form.domains'} can be either a scalar or an array reference.
1239: # We need an array.
1240: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1241: : ($ENV{'form.domains'}) );
1242: my %domain_hash = ();
1243: my $pretty_domains_string;
1244: foreach (@allowed_domains) {
1245: $domain_hash{$_}++;
1246: }
1247: if ($domain_hash{'any'}) {
1248: $pretty_domains_string = "In all LON-CAPA domains.";
1249: } else {
1250: if (@allowed_domains > 1) {
1251: $pretty_domains_string = "In LON-CAPA domains:";
1252: } else {
1253: $pretty_domains_string = "In LON-CAPA domain ";
1254: }
1255: foreach (sort @allowed_domains) {
1256: $pretty_domains_string .= "<b>".$_."</b> ";
1257: }
1258: foreach (keys(%Apache::lonnet::libserv)) {
1259: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1260: push @$libraries_to_query,$_;
1261: }
1262: }
1263: }
1264: $pretty_search_string .= $pretty_domains_string."<br />\n";
1265: #
1266: if (@queries) {
1267: $query=join(" AND ",@queries);
1268: $query="select * from metadata where $query";
1269: } elsif ($customquery) {
1270: $query = '';
1271: }
1272: return ($query,$customquery,$customshow,$libraries_to_query,
1273: $pretty_search_string);
1274: }
1275:
1276: ######################################################################
1277: ######################################################################
1278:
1279: =pod
1280:
1281: =item &parse_basic_search()
1282:
1283: Parse the basic search form and return a scalar containing an sql query.
1284:
1285: =cut
1286:
1287: ######################################################################
1288: ######################################################################
1289: sub parse_basic_search {
1290: my ($r,$closebutton)=@_;
1291: # Clean up fields for safety
1292: for my $field ('basicexp') {
1293: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1294: }
1295: foreach ('mode','form','element') {
1296: # is this required? Hmmm.
1297: next unless (exists($ENV{"form.$_"}));
1298: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1299: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1300: }
1301:
1302: # Check to see if enough is filled in
1303: unless (&filled($ENV{'form.basicexp'})) {
1304: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1305: return OK;
1306: }
1307: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1308: my $search_string = $ENV{'form.basicexp'};
1309: if ($ENV{'form.related'}) {
1310: my @New_Words;
1311: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1312: if (@New_Words) {
1313: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1314: } else {
1315: $pretty_search_string .= " with no related words.";
1316: }
1317: }
1318: # Build SQL query string based on form page
1319: my $query='';
1320: my $concatarg=join('," ",',
1321: ('title', 'author', 'subject', 'notes', 'abstract',
1322: 'keywords'));
1323: $concatarg='title' if $ENV{'form.titleonly'};
1324: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1325: $pretty_search_string .= "<br />\n";
1326: return 'select * from metadata where '.$query,$pretty_search_string;
1327: }
1328:
1329:
1330: ######################################################################
1331: ######################################################################
1332:
1333: =pod
1334:
1335: =item &related_version
1336:
1337: Modifies an input string to include related words. Words in the string
1338: are replaced with parenthesized lists of 'OR'd words. For example
1339: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1340:
1341: Note: Using this twice on a string is probably silly.
1342:
1343: =cut
1344:
1345: ######################################################################
1346: ######################################################################
1347: sub related_version {
1348: my $search_string = shift;
1349: my $result = $search_string;
1350: my %New_Words = ();
1351: while ($search_string =~ /(\w+)/cg) {
1352: my $word = $1;
1353: next if (lc($word) =~ /\b(or|and|not)\b/);
1354: my @Words = &Apache::loncommon::get_related_words($word);
1355: @Words = ($#Words>4? @Words[0..4] : @Words);
1356: foreach (@Words) { $New_Words{$_}++;}
1357: my $replacement = join " OR ", ($word,@Words);
1358: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1359: }
1360: return $result,sort(keys(%New_Words));
1361: }
1362:
1363: ######################################################################
1364: ######################################################################
1365:
1366: =pod
1367:
1368: =item &build_SQL_query()
1369:
1370: Builds a SQL query string from a logical expression with AND/OR keywords
1371: using Text::Query and &recursive_SQL_query_builder()
1372:
1373: =cut
1374:
1375: ######################################################################
1376: ######################################################################
1377: sub build_SQL_query {
1378: my ($field_name,$logic_statement)=@_;
1379: my $q=new Text::Query('abc',
1380: -parse => 'Text::Query::ParseAdvanced',
1381: -build => 'Text::Query::Build');
1382: $q->prepare($logic_statement);
1383: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1384: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1385: return $sql_query;
1386: }
1387:
1388: ######################################################################
1389: ######################################################################
1390:
1391: =pod
1392:
1393: =item &build_custommetadata_query()
1394:
1395: Constructs a custom metadata query using a rather heinous regular
1396: expression.
1397:
1398: =cut
1399:
1400: ######################################################################
1401: ######################################################################
1402: sub build_custommetadata_query {
1403: my ($field_name,$logic_statement)=@_;
1404: my $q=new Text::Query('abc',
1405: -parse => 'Text::Query::ParseAdvanced',
1406: -build => 'Text::Query::BuildAdvancedString');
1407: $q->prepare($logic_statement);
1408: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1409: # quick fix to change literal into xml tag-matching
1410: # will eventually have to write a separate builder module
1411: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1412: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1413: /\\<$1\\>?# \<wordone\>
1414: \[\^\\<\]?# [^\<]
1415: \*$2\[\^\\<\]?# *wordtwo[^\<]
1416: \*\\<\\\/$1\\>?# *\<\/wordone\>
1417: /g;
1418: return $matchexp;
1419: }
1420:
1421: ######################################################################
1422: ######################################################################
1423:
1424: =pod
1425:
1426: =item &recursive_SQL_query_build()
1427:
1428: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1429:
1430: =cut
1431:
1432: ######################################################################
1433: ######################################################################
1434: sub recursive_SQL_query_build {
1435: my ($dkey,$pattern)=@_;
1436: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1437: return $pattern unless @matches;
1438: foreach my $match (@matches) {
1439: $match=~/\[ (\w+)\s(.*) \]/;
1440: my ($key,$value)=($1,$2);
1441: my $replacement='';
1442: if ($key eq 'literal') {
1443: $replacement="($dkey like \"\%$value\%\")";
1444: }
1445: elsif ($key eq 'not') {
1446: $value=~s/like/not like/;
1447: # $replacement="($dkey not like $value)";
1448: $replacement="$value";
1449: }
1450: elsif ($key eq 'and') {
1451: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1452: $replacement="($1 AND $2)";
1453: }
1454: elsif ($key eq 'or') {
1455: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1456: $replacement="($1 OR $2)";
1457: }
1458: substr($pattern,
1459: index($pattern,$match),
1460: length($match),
1461: $replacement
1462: );
1463: }
1464: &recursive_SQL_query_build($dkey,$pattern);
1465: }
1466:
1467: ######################################################################
1468: ######################################################################
1469:
1470: =pod
1471:
1472: =item &build_date_queries()
1473:
1474: Builds a SQL logic query to check time/date entries.
1475: Also reports errors (check for /^Incorrect/).
1476:
1477: =cut
1478:
1479: ######################################################################
1480: ######################################################################
1481: sub build_date_queries {
1482: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1483: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1484: my @queries;
1485: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1486: unless ($cmonth1 and $cday1 and $cyear1 and
1487: $cmonth2 and $cday2 and $cyear2) {
1488: return "Incorrect entry for the creation date. You must specify ".
1489: "a starting month, day, and year and an ending month, ".
1490: "day, and year.";
1491: }
1492: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1493: $cnumeric1+=0;
1494: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1495: $cnumeric2+=0;
1496: if ($cnumeric1>$cnumeric2) {
1497: return "Incorrect entry for the creation date. The starting ".
1498: "date must occur before the ending date.";
1499: }
1500: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1501: "$cyear2-$cmonth2-$cday2 23:59:59')";
1502: push @queries,$cquery;
1503: }
1504: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1505: unless ($lmonth1 and $lday1 and $lyear1 and
1506: $lmonth2 and $lday2 and $lyear2) {
1507: return "Incorrect entry for the last revision date. You must ".
1508: "specify a starting month, day, and year and an ending ".
1509: "month, day, and year.";
1510: }
1511: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1512: $lnumeric1+=0;
1513: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1514: $lnumeric2+=0;
1515: if ($lnumeric1>$lnumeric2) {
1516: return "Incorrect entry for the last revision date. The ".
1517: "starting date must occur before the ending date.";
1518: }
1519: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1520: "$lyear2-$lmonth2-$lday2 23:59:59')";
1521: push @queries,$lquery;
1522: }
1523: if (@queries) {
1524: return join(" AND ",@queries);
1525: }
1526: return '';
1527: }
1528:
1529: ######################################################################
1530: ######################################################################
1531:
1532: =pod
1533:
1534: =item ©right_check()
1535:
1536: =cut
1537:
1538: ######################################################################
1539: ######################################################################
1540: sub copyright_check {
1541: my $Metadata = shift;
1542: # Check copyright tags and skip results the user cannot use
1543: my (undef,undef,$resdom,$resname) = split('/',
1544: $Metadata->{'url'});
1545: # Check for priv
1546: if (($Metadata->{'copyright'} eq 'priv') &&
1547: (($ENV{'user.name'} ne $resname) &&
1548: ($ENV{'user.domain'} ne $resdom))) {
1549: return 0;
1550: }
1551: # Check for domain
1552: if (($Metadata->{'copyright'} eq 'domain') &&
1553: ($ENV{'user.domain'} ne $resdom)) {
1554: return 0;
1555: }
1556: return 1;
1557: }
1558:
1559:
1560: ######################################################################
1561: ######################################################################
1562:
1563: =pod
1564:
1565: =item &ensure_db_and_table
1566:
1567: Ensure we can get lonmysql to connect to the database and the table we
1568: need exists.
1569:
1570: Inputs: $r, table id
1571:
1572: Returns: undef on error, 1 if the table exists.
1573:
1574: =cut
1575:
1576: ######################################################################
1577: ######################################################################
1578: sub ensure_db_and_table {
1579: my ($r,$table) = @_;
1580: ##
1581: ## Sanity check the table id.
1582: ##
1583: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1584: $r->print("Unable to retrieve search results. ".
1585: "Unable to determine the table results were stored in. ".
1586: "</body></html>");
1587: return undef;
1588: }
1589: ##
1590: ## Make sure we can connect and the table exists.
1591: ##
1592: my $connection_result = &Apache::lonmysql::connect_to_db();
1593: if (!defined($connection_result)) {
1594: $r->print("Unable to connect to the MySQL database where your results".
1595: " are stored. </body></html>");
1596: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1597: " connect to database.");
1598: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1599: return undef;
1600: }
1601: my $table_check = &Apache::lonmysql::check_table($table);
1602: if (! defined($table_check)) {
1603: $r->print("A MySQL error has occurred.</form></body></html>");
1604: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1605: " of table ".$table);
1606: return undef;
1607: } elsif (! $table_check) {
1608: $r->print("The table of results could not be found.");
1609: &Apache::lonnet::logthis("The user requested a table, ".$table.
1610: ", that could not be found.");
1611: return undef;
1612: }
1613: return 1;
1614: }
1615:
1616: ######################################################################
1617: ######################################################################
1618:
1619: =pod
1620:
1621: =item &print_sort_form
1622:
1623: =cut
1624:
1625: ######################################################################
1626: ######################################################################
1627: sub print_sort_form {
1628: my ($r,$pretty_query_string) = @_;
1629: ##
1630: my %SortableFields =
1631: (id => 'Default',
1632: title => 'Title',
1633: author => 'Author',
1634: subject => 'Subject',
1635: url => 'URL',
1636: version => 'Version Number',
1637: mime => 'Mime type',
1638: lang => 'Language',
1639: owner => 'Owner/Publisher',
1640: copyright => 'Copyright',
1641: hostname => 'Host',
1642: creationdate => 'Creation Date',
1643: lastrevisiondate => 'Revision Date',
1644: );
1645: ##
1646: my $table = $ENV{'form.table'};
1647: return if (! &ensure_db_and_table($r,$table));
1648: ##
1649: ## Get the number of results
1650: ##
1651: my $total_results = &Apache::lonmysql::number_of_rows($table);
1652: if (! defined($total_results)) {
1653: $r->print("A MySQL error has occurred.</form></body></html>");
1654: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1655: " of rows in table ".$table);
1656: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1657: return;
1658: }
1659: my $result;
1660: $result.=<<END;
1661: <html>
1662: <head>
1663: <script>
1664: function change_sort() {
1665: var newloc = "/adm/searchcat?phase=results";
1666: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1667: newloc += "&sortby=";
1668: newloc += document.forms.statusform.elements.sortby.value;
1669: parent.resultsframe.location= newloc;
1670: }
1671: </script>
1672: <title>Results</title>
1673: </head>
1674: <body>
1675: <form name="statusform" action="" method="post">
1676: END
1677:
1678: #<h2>Sort Results</h2>
1679: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1680: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1681: # foreach (keys(%SortableFields)) {
1682: # $result.="<option name=\"$_\"";
1683: # if ($_ eq $ENV{'form.sortby'}) {
1684: # $result.=" selected ";
1685: # }
1686: # $result.=" >$SortableFields{$_}</option>\n";
1687: # }
1688: # $result.="</select>\n";
1689: my $revise = &revise_button();
1690: $result.=<<END;
1691: <p>
1692: There are $total_results matches to your query. $revise
1693: </p><p>
1694: Search:$pretty_query_string
1695: </p>
1696: </form>
1697: </body>
1698: </html>
1699: END
1700: $r->print($result);
1701: return;
1702: }
1703:
1704: #####################################################################
1705: #####################################################################
1706:
1707: =pod
1708:
1709: =item MySQL Table Description
1710:
1711: MySQL table creation requires a precise description of the data to be
1712: stored. The use of the correct types to hold data is vital to efficient
1713: storage and quick retrieval of records. The columns must be described in
1714: the following format:
1715:
1716: =cut
1717:
1718: ##
1719: ## Restrictions:
1720: ## columns of type 'text' and 'blob' cannot have defaults.
1721: ## columns of type 'enum' cannot be used for FULLTEXT.
1722: ##
1723: my @DataOrder = qw/id title author subject url keywords version notes
1724: abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
1725:
1726: my %Datatypes =
1727: ( id =>{ type => 'MEDIUMINT',
1728: restrictions => 'UNSIGNED NOT NULL',
1729: primary_key => 'yes',
1730: auto_inc => 'yes'
1731: },
1732: title =>{ type=>'TEXT'},
1733: author =>{ type=>'TEXT'},
1734: subject =>{ type=>'TEXT'},
1735: url =>{ type=>'TEXT',
1736: restrictions => 'NOT NULL' },
1737: keywords =>{ type=>'TEXT'},
1738: version =>{ type=>'TEXT'},
1739: notes =>{ type=>'TEXT'},
1740: abstract =>{ type=>'TEXT'},
1741: mime =>{ type=>'TEXT'},
1742: lang =>{ type=>'TEXT'},
1743: owner =>{ type=>'TEXT'},
1744: copyright =>{ type=>'TEXT'},
1745: hostname =>{ type=>'TEXT'},
1746: #--------------------------------------------------
1747: creationdate =>{ type=>'DATETIME'},
1748: lastrevisiondate =>{ type=>'DATETIME'},
1749: #--------------------------------------------------
1750: );
1751:
1752: my @Fullindicies =
1753: qw/title/;
1754: # qw/title author subject abstract mime language owner copyright/;
1755:
1756: ######################################################################
1757: ######################################################################
1758:
1759: =pod
1760:
1761: =item &create_results_table()
1762:
1763: Creates the table of search results by calling lonmysql. Stores the
1764: table id in $ENV{'form.table'}
1765:
1766: Inputs: none.
1767:
1768: Returns: the identifier of the table on success, undef on error.
1769:
1770: =cut
1771:
1772: ######################################################################
1773: ######################################################################
1774: sub create_results_table {
1775: my $table = &Apache::lonmysql::create_table
1776: ( { columns => \%Datatypes,
1777: column_order => \@DataOrder,
1778: fullindex => \@Fullindicies,
1779: } );
1780: if (defined($table)) {
1781: $ENV{'form.table'} = $table;
1782: return $table;
1783: }
1784: return undef; # Error...
1785: }
1786:
1787: ######################################################################
1788: ######################################################################
1789:
1790: =pod
1791:
1792: =item Search Status update functions
1793:
1794: Each of the following functions changes the values of one of the
1795: input fields used to display the search status to the user. The names
1796: should be explanatory.
1797:
1798: Inputs: Apache request handler ($r), text to display.
1799:
1800: Returns: Nothing.
1801:
1802: =over 4
1803:
1804: =item &update_count_status()
1805:
1806: =item &update_status()
1807:
1808: =item &update_seconds()
1809:
1810: =back
1811:
1812: =cut
1813:
1814: ######################################################################
1815: ######################################################################
1816: sub update_count_status {
1817: my ($r,$text) = @_;
1818: $text =~ s/\'/\\\'/g;
1819: $r->print
1820: ("<script>document.statusform.count.value = ' $text'</script>\n");
1821: $r->rflush();
1822: }
1823:
1824: sub update_status {
1825: my ($r,$text) = @_;
1826: $text =~ s/\'/\\\'/g;
1827: $r->print
1828: ("<script>document.statusform.status.value = ' $text'</script>\n");
1829: $r->rflush();
1830: }
1831:
1832: sub update_seconds {
1833: my ($r,$text) = @_;
1834: $text =~ s/\'/\\\'/g;
1835: $r->print
1836: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1837: $r->rflush();
1838: }
1839:
1840: ######################################################################
1841: ######################################################################
1842:
1843: =pod
1844:
1845: =item &revise_button
1846:
1847: Inputs: None
1848:
1849: Returns: html string for a 'revise search' button.
1850:
1851: =cut
1852:
1853: ######################################################################
1854: ######################################################################
1855: sub revise_button {
1856: my $revise_phase = 'disp_basic';
1857: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1858: my $newloc = '/adm/searchcat'.
1859: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1860: '&phase='.$revise_phase;
1861: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1862: qq{ onClick="parent.location='$newloc';" /> };
1863: return $result;
1864: }
1865:
1866: ######################################################################
1867: ######################################################################
1868:
1869: =pod
1870:
1871: =item &run_search
1872:
1873: =cut
1874:
1875: ######################################################################
1876: ######################################################################
1877: sub run_search {
1878: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1879: my $connection = $r->connection;
1880: #
1881: # Timing variables
1882: #
1883: my $starttime = time;
1884: my $max_time = 30; # seconds for the search to complete
1885: #
1886: # Print run_search header
1887: #
1888: $r->print(<<END);
1889: <html>
1890: <head><title>Search Status</title></head>
1891: <body>
1892: <form name="statusform" action="" method="post">
1893: <input type="hidden" name="Queue" value="" />
1894: END
1895: # Check to see if $pretty_string has more than one carriage return.
1896: # Assume \n s are following <br /> s and truncate the value.
1897: # (there is probably a better way)...
1898: my @Lines = split /<br \/>/,$pretty_string;
1899: if (@Lines > 2) {
1900: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1901: }
1902: $r->print("Search: ".$pretty_string);
1903: $r->rflush();
1904: #
1905: # Determine the servers we need to contact.
1906: #
1907: my @Servers_to_contact;
1908: if (defined($serverlist)) {
1909: if (ref($serverlist) eq 'ARRAY') {
1910: @Servers_to_contact = @$serverlist;
1911: } else {
1912: @Servers_to_contact = ($serverlist);
1913: }
1914: } else {
1915: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1916: }
1917: my %Server_status;
1918: my $table =$ENV{'form.table'};
1919: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1920: $r->print("Unable to determine table id to store search results in.".
1921: "The search has been aborted.</body></html>");
1922: return;
1923: }
1924: my $table_status = &Apache::lonmysql::check_table($table);
1925: if (! defined($table_status)) {
1926: $r->print("Unable to determine status of table.</body></html>");
1927: &Apache::lonnet::logthis("Bogus table id of $table for ".
1928: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1929: &Apache::lonnet::logthis("lonmysql error = ".
1930: &Apache::lonmysql::get_error());
1931: return;
1932: }
1933: if (! $table_status) {
1934: $r->print("The table id,$table, we tried to use is invalid.".
1935: "The search has been aborted.</body></html>");
1936: return;
1937: }
1938: ##
1939: ## Prepare for the big loop.
1940: ##
1941: my $hitcountsum;
1942: my $server;
1943: my $status;
1944: my $revise = &revise_button();
1945: $r->print(<<END);
1946: <table>
1947: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1948: <tr>
1949: <td><input type="text" name="status" value="" size="30" /></td>
1950: <td><input type="text" name="count" value="" size="10" /></td>
1951: <td><input type="text" name="seconds" value="" size="8" /></td>
1952: <td>$revise</td>
1953: </tr>
1954: </table>
1955: </form>
1956: END
1957: $r->rflush();
1958: my $time_remaining = $max_time - (time - $starttime) ;
1959: my $last_time = $time_remaining;
1960: &update_seconds($r,$time_remaining);
1961: while (($time_remaining > 0) &&
1962: ((@Servers_to_contact) || keys(%Server_status))) {
1963: # Send out a search request if it needs to be done.
1964: if (@Servers_to_contact) {
1965: # Contact one server
1966: my $server = shift(@Servers_to_contact);
1967: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1968: $customshow,[$server]);
1969: ($server) = keys(%$reply);
1970: $Server_status{$server} = $reply->{$server};
1971: &update_status($r,'contacting '.$server);
1972: } else {
1973: # wait a sec. to give time for files to be written
1974: # This sleep statement is here instead of outside the else
1975: # block because we do not want to pause if we have servers
1976: # left to contact.
1977: sleep(1);
1978: }
1979: &update_status($r,'waiting on '.(join(' ',keys(%Server_status))));
1980: while (my ($server,$status) = each(%Server_status)) {
1981: last if ($connection->aborted());
1982: if ($status eq 'con_lost') {
1983: delete ($Server_status{$server});
1984: next;
1985: }
1986: $status=~/^([\.\w]+)$/;
1987: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1988: if (-e $datafile && ! -e "$datafile.end") {
1989: &update_status($r,'Receiving results from '.$server);
1990: next;
1991: }
1992: last if ($connection->aborted());
1993: if (-e "$datafile.end") {
1994: &update_status($r,'Reading results from '.$server);
1995: if (-z "$datafile") {
1996: delete($Server_status{$server});
1997: next;
1998: }
1999: my $fh;
2000: if (!($fh=Apache::File->new($datafile))) {
2001: $r->print("Unable to open search results file for ".
2002: "server $server. Omitting from search");
2003: delete($Server_status{$server});
2004: next;
2005: }
2006: # Read in the whole file.
2007: while (my $result = <$fh>) {
2008: last if ($connection->aborted());
2009: # handle custom fields? Someday we will!
2010: chomp($result);
2011: next unless $result;
2012: # Parse the result.
2013: my %Fields = &parse_raw_result($result,$server);
2014: $Fields{'hostname'} = $server;
2015: next if (! ©right_check(\%Fields));
2016: # Store the result in the mysql database
2017: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2018: if (! defined($result)) {
2019: $r->print(&Apache::lonmysql::get_error());
2020: }
2021: # $r->print(&Apache::lonmysql::get_debug());
2022: $hitcountsum ++;
2023: $time_remaining = $max_time - (time - $starttime) ;
2024: if ($last_time - $time_remaining > 0) {
2025: &update_seconds($r,$time_remaining);
2026: $last_time = $time_remaining;
2027: }
2028: if ($hitcountsum % 50 == 0) {
2029: &update_count_status($r,$hitcountsum);
2030: }
2031: } # End of foreach (@results)
2032: $fh->close();
2033: # $server is only deleted if the results file has been
2034: # found and (successfully) opened. This may be a bad idea.
2035: delete($Server_status{$server});
2036: }
2037: last if ($connection->aborted());
2038: &update_count_status($r,$hitcountsum);
2039: }
2040: last if ($connection->aborted());
2041: # Finished looping through the servers
2042: $time_remaining = $max_time - (time - $starttime) ;
2043: if ($last_time - $time_remaining > 0) {
2044: $last_time = $time_remaining;
2045: &update_seconds($r,$time_remaining);
2046: }
2047: }
2048: &update_status($r,'Search Complete'.$server);
2049: &update_seconds($r,0);
2050: &Apache::lonmysql::disconnect_from_db();
2051: # We have run out of time or run out of servers to talk to and
2052: # results to get.
2053: $r->print("</body></html>");
2054: $r->print("<script>window.location='/adm/searchcat?phase=sort&persistent_db_id=$ENV{'form.persistent_db_id'}';</script>");
2055: return;
2056: }
2057:
2058: ######################################################################
2059: ######################################################################
2060: =pod
2061:
2062: =item &prev_next_buttons
2063:
2064: =cut
2065:
2066: ######################################################################
2067: ######################################################################
2068: sub prev_next_buttons {
2069: my ($current_min,$show,$total,$parms) = @_;
2070: return '' if ($show eq 'all'); # No links if you get them all at once.
2071: my $links;
2072: ##
2073: ## Prev
2074: my $prev_min = $current_min - $show;
2075: $prev_min = 1 if $prev_min < 1;
2076: if ($prev_min < $current_min) {
2077: $links .= qq{
2078: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2079: };
2080: } else {
2081: $links .= 'prev';
2082: }
2083: ##
2084: ## Pages.... Someday.
2085: ##
2086: $links .= qq{
2087: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2088: };
2089: ##
2090: ## Next
2091: my $next_min = $current_min + $show;
2092: $next_min = $current_min if ($next_min > $total);
2093: if ($next_min != $current_min) {
2094: $links .= qq{
2095: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2096: };
2097: } else {
2098: $links .= ' next';
2099: }
2100: return $links;
2101: }
2102: ######################################################################
2103: ######################################################################
2104:
2105: =pod
2106:
2107: =item &display_results
2108:
2109: =cut
2110:
2111: ######################################################################
2112: ######################################################################
2113: sub display_results {
2114: my ($r,$importbutton,$closebutton) = @_;
2115: my $connection = $r->connection;
2116: $r->print(&search_results_header($importbutton,$closebutton));
2117: ##
2118: ## Set viewing function
2119: ##
2120: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2121: if (!defined($viewfunction)) {
2122: $r->print("Internal Error - Bad view selected.\n");
2123: $r->rflush();
2124: return;
2125: }
2126: ##
2127: ## Get the catalog controls setup
2128: ##
2129: my $action = "/adm/searchcat?phase=results";
2130: ##
2131: ## Deal with groupsearch
2132: ##
2133: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2134: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2135: &GDBM_WRCREAT(),0640)) {
2136: $r->print('Unable to store import results.</form></body></html>');
2137: $r->rflush();
2138: return;
2139: }
2140: }
2141: ##
2142: ## Prepare the table for querying
2143: ##
2144: my $table = $ENV{'form.table'};
2145: return if (! &ensure_db_and_table($r,$table));
2146: ##
2147: ## Get the number of results
2148: ##
2149: my $total_results = &Apache::lonmysql::number_of_rows($table);
2150: if (! defined($total_results)) {
2151: $r->print("A MySQL error has occurred.</form></body></html>");
2152: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2153: " of rows in table ".$table);
2154: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2155: return;
2156: }
2157: ##
2158: ## Determine how many results we need to get
2159: ##
2160: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2161: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2162: my $min = $ENV{'form.start'};
2163: my $max;
2164: if ($ENV{'form.show'} eq 'all') {
2165: $max = $total_results ;
2166: } else {
2167: $max = $min + $ENV{'form.show'} - 1;
2168: $max = $total_results if ($max > $total_results);
2169: }
2170: ##
2171: ## Output links (if necessary) for 'prev' and 'next' pages.
2172: ##
2173: $r->print
2174: ('<center>'.
2175: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2176: "table=".$ENV{'form.table'}.
2177: "&phase=results".
2178: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2179: ."</center>\n"
2180: );
2181: if ($total_results == 0) {
2182: $r->print("There are currently no results.\n".
2183: "</form></body></html>");
2184: return;
2185: } else {
2186: $r->print
2187: ("<center>Results $min to $max out of $total_results</center>\n");
2188: }
2189: ##
2190: ## Get results from MySQL table
2191: ##
2192: my @Results = &Apache::lonmysql::get_rows($table,
2193: 'id>='.$min.' AND id<='.$max);
2194: ##
2195: ## Loop through the results and output them.
2196: ##
2197: foreach my $row (@Results) {
2198: if ($connection->aborted()) {
2199: untie %groupsearch_db if (tied(%groupsearch_db));
2200: &Apache::lonmysql::disconnect_from_db();
2201: return;
2202: }
2203: my %Fields = %{&parse_row(@$row)};
2204: my $output="<p>\n";
2205: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'});
2206: # Render the result into html
2207: $output.= &$viewfunction($prefix,%Fields);
2208: # Print them out as they come in.
2209: $r->print($output);
2210: $r->rflush();
2211: }
2212: if (@Results < 1) {
2213: $r->print("There were no results matching your query");
2214: } else {
2215: $r->print
2216: ('<center>'.
2217: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2218: "table=".$ENV{'form.table'}.
2219: "&phase=results".
2220: "&persistent_db_id=".
2221: $ENV{'form.persistent_db_id'})
2222: ."</center>\n"
2223: );
2224: }
2225: $r->print("</form></body></html>");
2226: $r->rflush();
2227: untie %groupsearch_db if (tied(%groupsearch_db));
2228: return;
2229: }
2230:
2231: ######################################################################
2232: ######################################################################
2233:
2234: =pod
2235:
2236: =item &catalogmode_output($title,$url)
2237:
2238: Returns html needed for the various catalog modes. Gets inputs from
2239: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db and $fnum
2240: (local variable).
2241:
2242: =cut
2243:
2244: ######################################################################
2245: ######################################################################
2246: {
2247: my $fnum = 0;
2248:
2249: sub catalogmode_output {
2250: my $output = '';
2251: my ($title,$url) = @_;
2252: if ($ENV{'form.catalogmode'} eq 'interactive') {
2253: $title=~ s/\'/\\\'/g;
2254: if ($ENV{'form.catalogmode'} eq 'interactive') {
2255: $output.=<<END
2256: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2257: onClick="javascript:select_data('$title','$url')">
2258: </font>
2259: END
2260: }
2261: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2262: $groupsearch_db{"pre_${fnum}_link"}=$url;
2263: $groupsearch_db{"pre_${fnum}_title"}=$title;
2264: $output.=<<END;
2265: <font size='-1'>
2266: <input type="checkbox" name="returnvalues" value="SELECT"
2267: onClick="javascript:queue($fnum)" />
2268: </font>
2269: END
2270: $fnum++;
2271: }
2272: return $output;
2273: }
2274:
2275: }
2276: ######################################################################
2277: ######################################################################
2278:
2279: =pod
2280:
2281: =item &parse_row
2282:
2283: Parse a row returned from the database.
2284:
2285: =cut
2286:
2287: ######################################################################
2288: ######################################################################
2289: sub parse_row {
2290: my @Row = @_;
2291: my %Fields;
2292: for (my $i=0;$i<=$#Row;$i++) {
2293: $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
2294: }
2295: $Fields{'language'} =
2296: &Apache::loncommon::languagedescription($Fields{'lang'});
2297: $Fields{'copyrighttag'} =
2298: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2299: $Fields{'mimetag'} =
2300: &Apache::loncommon::filedescription($Fields{'mime'});
2301: return \%Fields;
2302: }
2303:
2304: ###########################################################
2305: ###########################################################
2306:
2307: =pod
2308:
2309: =item &parse_raw_result()
2310:
2311: Takes a line from the file of results and parse it. Returns a hash
2312: with keys for the following fields:
2313: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
2314: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
2315: 'lastrevisiondate'.
2316:
2317: In addition, the following tags are set by calling the appropriate
2318: lonnet function: 'language', 'cprtag', 'mimetag'.
2319:
2320: The 'title' field is set to "Untitled" if the title field is blank.
2321:
2322: 'abstract' and 'keywords' are truncated to 200 characters.
2323:
2324: =cut
2325:
2326: ###########################################################
2327: ###########################################################
2328: sub parse_raw_result {
2329: my ($result,$hostname) = @_;
2330: # Check for a comma - if it is there then we do not need to unescape the
2331: # string. There seems to be some kind of problem with some items in
2332: # the database - the entire string gets sent out unescaped...?
2333: unless ($result =~ /,/) {
2334: $result = &Apache::lonnet::unescape($result);
2335: }
2336: my @fields=map {
2337: &Apache::lonnet::unescape($_);
2338: } (split(/\,/,$result));
2339: my ($title,$author,$subject,$url,$keywords,$version,
2340: $notes,$abstract,$mime,$lang,
2341: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
2342: my %Fields =
2343: ( title => &Apache::lonnet::unescape($title),
2344: author => &Apache::lonnet::unescape($author),
2345: subject => &Apache::lonnet::unescape($subject),
2346: url => &Apache::lonnet::unescape($url),
2347: keywords => &Apache::lonnet::unescape($keywords),
2348: version => &Apache::lonnet::unescape($version),
2349: notes => &Apache::lonnet::unescape($notes),
2350: abstract => &Apache::lonnet::unescape($abstract),
2351: mime => &Apache::lonnet::unescape($mime),
2352: lang => &Apache::lonnet::unescape($lang),
2353: owner => &Apache::lonnet::unescape($owner),
2354: copyright => &Apache::lonnet::unescape($copyright),
2355: creationdate => &Apache::lonnet::unescape($creationdate),
2356: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
2357: );
2358: $Fields{'language'} =
2359: &Apache::loncommon::languagedescription($Fields{'lang'});
2360: $Fields{'copyrighttag'} =
2361: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2362: $Fields{'mimetag'} =
2363: &Apache::loncommon::filedescription($Fields{'mime'});
2364: if ($Fields{'author'}=~/^(\s*|error)$/) {
2365: $Fields{'author'}="Unknown Author";
2366: }
2367: # Put spaces in the keyword list, if needed.
2368: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
2369: if ($Fields{'title'}=~ /^\s*$/ ) {
2370: $Fields{'title'}='Untitled';
2371: }
2372: unless ($ENV{'user.adv'}) {
2373: # What is this anyway?
2374: $Fields{'keywords'} = '- not displayed -';
2375: $Fields{'notes'} = '- not displayed -';
2376: $Fields{'abstract'} = '- not displayed -';
2377: $Fields{'subject'} = '- not displayed -';
2378: }
2379: if (length($Fields{'abstract'})>200) {
2380: $Fields{'abstract'} =
2381: substr($Fields{'abstract'},0,200).'...';
2382: }
2383: if (length($Fields{'keywords'})>200) {
2384: $Fields{'keywords'} =
2385: substr($Fields{'keywords'},0,200).'...';
2386: }
2387: return %Fields;
2388: }
2389:
2390: ###########################################################
2391: ###########################################################
2392:
2393: =pod
2394:
2395: =item &handle_custom_fields()
2396:
2397: =cut
2398:
2399: ###########################################################
2400: ###########################################################
2401: sub handle_custom_fields {
2402: my @results = @{shift()};
2403: my $customshow='';
2404: my $extrashow='';
2405: my @customfields;
2406: if ($ENV{'form.customshow'}) {
2407: $customshow=$ENV{'form.customshow'};
2408: $customshow=~s/[^\w\s]//g;
2409: my @fields=map {
2410: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2411: } split(/\s+/,$customshow);
2412: @customfields=split(/\s+/,$customshow);
2413: if ($customshow) {
2414: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2415: }
2416: }
2417: my $customdata='';
2418: my %customhash;
2419: foreach my $result (@results) {
2420: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2421: my $tmp=$result;
2422: $tmp=~s/^custom\=//;
2423: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2424: } split(/\,/,$tmp);
2425: $customhash{$k}=$v;
2426: }
2427: }
2428: return ($extrashow,\@customfields,\%customhash);
2429: }
2430:
2431: ######################################################################
2432: ######################################################################
2433:
2434: =pod
2435:
2436: =item &search_results_header
2437:
2438: Output the proper html headers and javascript code to deal with different
2439: calling modes.
2440:
2441: Takes most inputs directly from %ENV, except $mode.
2442:
2443: =over 4
2444:
2445: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2446:
2447: =back
2448:
2449: The following environment variables are checked:
2450:
2451: =over 4
2452:
2453: =item 'form.catalogmode'
2454:
2455: Checked for 'interactive' and 'groupsearch'.
2456:
2457: =item 'form.mode'
2458:
2459: Checked for existance & 'edit' mode.
2460:
2461: =item 'form.form'
2462:
2463: =item 'form.element'
2464:
2465: =back
2466:
2467: =cut
2468:
2469: ######################################################################
2470: ######################################################################
2471: sub search_results_header {
2472: my ($importbutton,$closebutton) = @_;
2473: my $result = '';
2474: # output beginning of search page
2475: # conditional output of script functions dependent on the mode in
2476: # which the search was invoked
2477: if ($ENV{'form.catalogmode'} eq 'interactive'){
2478: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2479: $result.=<<SCRIPT;
2480: <script type="text/javascript">
2481: function select_data(title,url) {
2482: changeTitle(title);
2483: changeURL(url);
2484: parent.close();
2485: }
2486: function changeTitle(val) {
2487: if (opener.inf.document.forms.resinfo.elements.t) {
2488: opener.inf.document.forms.resinfo.elements.t.value=val;
2489: }
2490: }
2491: function changeURL(val) {
2492: if (opener.inf.document.forms.resinfo.elements.u) {
2493: opener.inf.document.forms.resinfo.elements.u.value=val;
2494: }
2495: }
2496: </script>
2497: SCRIPT
2498: } elsif ($ENV{'form.mode'} eq 'edit') {
2499: my $form = $ENV{'form.form'};
2500: my $element = $ENV{'form.element'};
2501: $result.=<<SCRIPT;
2502: <script type="text/javascript">
2503: function select_data(title,url) {
2504: changeURL(url);
2505: parent.close();
2506: }
2507: function changeTitle(val) {
2508: }
2509: function changeURL(val) {
2510: if (parent.targetwin.document) {
2511: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2512: } else {
2513: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2514: alert("Unable to transfer data to "+url);
2515: }
2516: }
2517: </script>
2518: SCRIPT
2519: }
2520: }
2521: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2522: <script type="text/javascript">
2523: function queue(val) {
2524: if (document.forms.results.returnvalues[val].checked) {
2525: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2526: } else {
2527: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2528: }
2529: }
2530: function select_group() {
2531: parent.window.location=
2532: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2533: parent.statusframe.document.forms.statusform.elements.Queue.value;
2534: }
2535: </script>
2536: SCRIPT
2537: $result.=<<END;
2538: </head>
2539: <form name="results" method="post" action="" >
2540: <input type="hidden" name="Queue" value="" />
2541: $importbutton
2542: END
2543: return $result;
2544: }
2545:
2546: ######################################################################
2547: ######################################################################
2548: sub search_status_header {
2549: return <<ENDSTATUS;
2550: <html><head><title>Search Status</title></head>
2551: <body>
2552: <h3>Search Status</h3>
2553: Sending search request to LON-CAPA servers.<br />
2554: ENDSTATUS
2555: }
2556:
2557: sub results_link {
2558: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2559: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2560: my $results_link = $basic_link."&phase=results".
2561: "&pause=1"."&start=1";
2562: return $results_link;
2563: }
2564:
2565: ######################################################################
2566: ######################################################################
2567: sub print_frames_interface {
2568: my $r = shift;
2569: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2570: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2571: my $run_search_link = $basic_link."&phase=run_search";
2572: my $results_link = &results_link();
2573: my $result = <<"ENDFRAMES";
2574: <html>
2575: <head>
2576: <script>
2577: var targetwin = opener;
2578: </script>
2579: <title>LON-CAPA Digital Library Search Results</title>
2580: </head>
2581: <frameset rows="150,*">
2582: <frame name="statusframe" src="$run_search_link">
2583: <frame name="resultsframe" src="$results_link">
2584: </frameset>
2585: </html>
2586: ENDFRAMES
2587:
2588: $r->print($result);
2589: return;
2590: }
2591:
2592: ######################################################################
2593: ######################################################################
2594:
2595: =pod
2596:
2597: =item Metadata Viewing Functions
2598:
2599: Output is a HTML-ified string.
2600: Input arguments are title, author, subject, url, keywords, version,
2601: notes, short abstract, mime, language, creation date,
2602: last revision date, owner, copyright, hostname, and
2603: extra custom metadata to show.
2604:
2605: =over 4
2606:
2607: =item &detailed_citation_view()
2608:
2609: =cut
2610:
2611: ######################################################################
2612: ######################################################################
2613: sub detailed_citation_view {
2614: my ($prefix,%values) = @_;
2615: my $result=<<END;
2616: <b>$prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2617: target='search_preview'>$values{'title'}</a></b>
2618: <p>
2619: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2620:
2621: <b>Subject: </b> $values{'subject'}<br />
2622: <b>Keyword(s): </b> $values{'keywords'}<br />
2623: <b>Notes: </b> $values{'notes'}<br />
2624: <b>MIME Type: </b> $values{'mimetag'}<br />
2625: <b>Language: </b> $values{'language'}<br />
2626: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
2627: </p>
2628: $values{'extrashow'}
2629: <p>
2630: $values{'shortabstract'}
2631: </p>
2632: <hr align='left' width='200' noshade />
2633: END
2634: return $result;
2635: }
2636:
2637: ######################################################################
2638: ######################################################################
2639:
2640: =pod
2641:
2642: =item &summary_view()
2643:
2644: =cut
2645: ######################################################################
2646: ######################################################################
2647: sub summary_view {
2648: my ($prefix,%values) = @_;
2649: my $result=<<END;
2650: $prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2651: target='search_preview'>$values{'author'}</a><br />
2652: $values{'title'}<br />
2653: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2654: $values{'copyrighttag'}<br />
2655: $values{'extrashow'}
2656: </p>
2657: <hr align='left' width='200' noshade />
2658: END
2659: return $result;
2660: }
2661:
2662: ######################################################################
2663: ######################################################################
2664:
2665: =pod
2666:
2667: =item &compact_view()
2668:
2669: =cut
2670:
2671: ######################################################################
2672: ######################################################################
2673: sub compact_view {
2674: my ($prefix,%values) = @_;
2675: my $result=<<END;
2676: $prefix <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2677: $values{'title'}</a>
2678: <b>$values{'author'}</b><br />
2679: END
2680: return $result;
2681: }
2682:
2683:
2684: ######################################################################
2685: ######################################################################
2686:
2687: =pod
2688:
2689: =item &fielded_format_view()
2690:
2691: =cut
2692:
2693: ######################################################################
2694: ######################################################################
2695: sub fielded_format_view {
2696: my ($prefix,%values) = @_;
2697: my $result=<<END;
2698: $prefix
2699: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2700: target='search_preview'>$values{'url'}</a>
2701: <br />
2702: <b>Title:</b> $values{'title'}<br />
2703: <b>Author(s):</b> $values{'author'}<br />
2704: <b>Subject:</b> $values{'subject'}<br />
2705: <b>Keyword(s):</b> $values{'keywords'}<br />
2706: <b>Notes:</b> $values{'notes'}<br />
2707: <b>MIME Type:</b> $values{'mimetag'}<br />
2708: <b>Language:</b> $values{'language'}<br />
2709: <b>Creation Date:</b> $values{'creationdate'}<br />
2710: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2711: <b>Publisher/Owner:</b> $values{'owner'}<br />
2712: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2713: <b>Repository Location:</b> $values{'hostname'}<br />
2714: <b>Abstract:</b> $values{'shortabstract'}<br />
2715: $values{'extrashow'}
2716: </p>
2717: <hr align='left' width='200' noshade />
2718: END
2719: return $result;
2720: }
2721:
2722: ######################################################################
2723: ######################################################################
2724:
2725: =pod
2726:
2727: =item &xml_sgml_view()
2728:
2729: =back
2730:
2731: =cut
2732:
2733: ######################################################################
2734: ######################################################################
2735: sub xml_sgml_view {
2736: my ($prefix,%values) = @_;
2737: my $result=<<END;
2738: $prefix
2739: <pre>
2740: <LonCapaResource>
2741: <url>$values{'url'}</url>
2742: <title>$values{'title'}</title>
2743: <author>$values{'author'}</author>
2744: <subject>$values{'subject'}</subject>
2745: <keywords>$values{'keywords'}</keywords>
2746: <notes>$values{'notes'}</notes>
2747: <mimeInfo>
2748: <mime>$values{'mime'}</mime>
2749: <mimetag>$values{'mimetag'}</mimetag>
2750: </mimeInfo>
2751: <languageInfo>
2752: <language>$values{'lang'}</language>
2753: <languagetag>$values{'language'}</languagetag>
2754: </languageInfo>
2755: <creationdate>$values{'creationdate'}</creationdate>
2756: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2757: <owner>$values{'owner'}</owner>
2758: <copyrightInfo>
2759: <copyright>$values{'copyright'}</copyright>
2760: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2761: </copyrightInfo>
2762: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2763: <shortabstract>$values{'shortabstract'}</shortabstract>
2764: </LonCapaResource>
2765: </pre>
2766: $values{'extrashow'}
2767: <hr align='left' width='200' noshade />
2768: END
2769: return $result;
2770: }
2771:
2772: ######################################################################
2773: ######################################################################
2774:
2775: =pod
2776:
2777: =item &filled() see if field is filled.
2778:
2779: =cut
2780:
2781: ######################################################################
2782: ######################################################################
2783: sub filled {
2784: my ($field)=@_;
2785: if ($field=~/\S/ && $field ne 'any') {
2786: return 1;
2787: }
2788: else {
2789: return 0;
2790: }
2791: }
2792:
2793: ######################################################################
2794: ######################################################################
2795:
2796: =pod
2797:
2798: =item &output_blank_field_error()
2799:
2800: Output a complete page that indicates the user has not filled in enough
2801: information to do a search.
2802:
2803: Inputs: $r (Apache request handle), $closebutton, $parms.
2804:
2805: Returns: nothing
2806:
2807: $parms is extra information to include in the 'Revise search request' link.
2808:
2809: =cut
2810:
2811: ######################################################################
2812: ######################################################################
2813: sub output_blank_field_error {
2814: my ($r,$closebutton,$parms)=@_;
2815: # make query information persistent to allow for subsequent revision
2816: $r->print(<<BEGINNING);
2817: <html>
2818: <head>
2819: <title>The LearningOnline Network with CAPA</title>
2820: BEGINNING
2821: $r->print(<<RESULTS);
2822: </head>
2823: <body bgcolor="#ffffff">
2824: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2825: <h1>Search Catalog</h1>
2826: <form method="post" action="/adm/searchcat">
2827: $hidden_fields
2828: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2829: >Revise search request</a>
2830: $closebutton
2831: <hr />
2832: <h3>Unactionable search query.</h3>
2833: <p>
2834: You did not fill in enough information for the search to be started.
2835: You need to fill in relevant fields on the search page in order
2836: for a query to be processed.
2837: </p>
2838: </body>
2839: </html>
2840: RESULTS
2841: }
2842:
2843: ######################################################################
2844: ######################################################################
2845:
2846: =pod
2847:
2848: =item &output_date_error()
2849:
2850: Output a full html page with an error message.
2851:
2852: Inputs:
2853:
2854: $r, the request pointer.
2855: $message, the error message for the user.
2856: $closebutton, the specialized close button needed for groupsearch.
2857:
2858: =cut
2859:
2860: ######################################################################
2861: ######################################################################
2862: sub output_date_error {
2863: my ($r,$message,$closebutton)=@_;
2864: # make query information persistent to allow for subsequent revision
2865: $r->print(<<RESULTS);
2866: <html>
2867: <head>
2868: <title>The LearningOnline Network with CAPA</title>
2869: </head>
2870: <body bgcolor="#ffffff">
2871: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2872: <h1>Search Catalog</h1>
2873: <form method="post" action="/adm/searchcat">
2874: $hidden_fields
2875: <input type='button' value='Revise search request'
2876: onClick='this.form.submit();' />
2877: $closebutton
2878: <hr />
2879: <h3>Error</h3>
2880: <p>
2881: $message
2882: </p>
2883: </body>
2884: </html>
2885: RESULTS
2886: }
2887:
2888: ######################################################################
2889: ######################################################################
2890:
2891: =pod
2892:
2893: =item &start_fresh_session()
2894:
2895: Cleans the global %groupsearch_db by removing all fields which begin with
2896: 'pre_' or 'store'.
2897:
2898: =cut
2899:
2900: ######################################################################
2901: ######################################################################
2902: sub start_fresh_session {
2903: delete $groupsearch_db{'mode_catalog'};
2904: foreach (keys %groupsearch_db) {
2905: if ($_ =~ /^pre_/) {
2906: delete $groupsearch_db{$_};
2907: }
2908: if ($_ =~ /^store/) {
2909: delete $groupsearch_db{$_};
2910: }
2911: }
2912: }
2913:
2914: 1;
2915:
2916: __END__
2917:
2918: =pod
2919:
2920: =back
2921:
2922: =cut
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