1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.157 2002/09/16 20:09:45 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a 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: =item $bodytag
119:
120: LON-CAPA standard body tag, gotten from &Apache::lonnet::bodytag.
121: No title, no table, just a <body> tag.
122:
123: =back
124:
125: =cut
126:
127: ######################################################################
128: ######################################################################
129:
130: # -- dynamically rendered interface components
131: my $importbutton; # button to take the selected results and go to group sorting
132:
133: # -- miscellaneous variables
134: my %groupsearch_db; # database hash
135: my $diropendb = ""; # db file
136: # View Description Function Pointer
137: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
138: "Summary View" => \&summary_view,
139: "Fielded Format" => \&fielded_format_view,
140: "XML/SGML" => \&xml_sgml_view,
141: "Compact View" => \&compact_view);
142: my %persistent_db;
143: my $hidden_fields;
144: my $bodytag;
145:
146: ######################################################################
147: ######################################################################
148:
149: =pod
150:
151: =item &handler() - main handler invoked by httpd child
152:
153: =item Variables
154:
155: =over 4
156:
157: =item $hidden
158:
159: holds 'hidden' html forms
160:
161: =item $scrout
162:
163: string that holds portions of the screen output
164:
165: =back
166:
167: =cut
168:
169: ######################################################################
170: ######################################################################
171: sub handler {
172: my $r = shift;
173: #
174:
175: my $loaderror=&Apache::lonnet::overloaderror($r);
176: if ($loaderror) { return $loaderror; }
177:
178: my $closebutton; # button that closes the search window
179: # This button is different for the RAT compared to
180: # normal invocation.
181: #
182: $r->content_type('text/html');
183: $r->send_http_header;
184: return OK if $r->header_only;
185: ##
186: ## Prevent caching of the search interface window. Hopefully this means
187: ## we will get the launch=1 passed in a little more.
188: &Apache::loncommon::no_cache($r);
189: ##
190: ## Pick up form fields passed in the links.
191: ##
192: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
193: ['catalogmode','launch','acts','mode','form','element','pause',
194: 'phase','persistent_db_id','table','start','show']);
195: ##
196: ## The following is a trick - we wait a few seconds if asked to so
197: ## the daemon running the search can get ahead of the daemon
198: ## printing the results. We only need (theoretically) to do
199: ## this once, so the pause indicator is deleted
200: ##
201: if (exists($ENV{'form.pause'})) {
202: sleep(3);
203: delete($ENV{'form.pause'});
204: }
205: ##
206: ## Initialize global variables
207: ##
208: my $domain = $r->dir_config('lonDefDomain');
209: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
210: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
211: #
212: # set the name of the persistent database
213: # $ENV{'form.persistent_db_id'} can only have digits in it.
214: if (! exists($ENV{'form.persistent_db_id'}) ||
215: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
216: ($ENV{'form.launch'} eq '1')) {
217: $ENV{'form.persistent_db_id'} = time;
218: }
219: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
220: my $persistent_db_file = "/home/httpd/perl/tmp/".
221: &Apache::lonnet::escape($domain).
222: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
223: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
224: ##
225: if (! &get_persistent_form_data($persistent_db_file)) {
226: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
227: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
228: "from $persistent_db_file");
229: $r->print(<<END);
230: <html>
231: <head><title>LON-CAPA Search Error</title></head>
232: $bodytag
233: We were unable to retrieve data describing your search. This is a serious
234: error and has been logged. Please alert your LON-CAPA administrator.
235: </body>
236: </html>
237: END
238: return OK;
239: }
240: }
241: ##
242: ## Clear out old values from groupsearch database
243: ##
244: untie %groupsearch_db if (tied(%groupsearch_db));
245: if (($ENV{'form.launch'} eq '1') &&
246: ($ENV{'form.catalogmode'} eq 'groupsearch')) {
247: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
248: &start_fresh_session();
249: untie %groupsearch_db;
250: } else {
251: # This is a stupid error to give to the user.
252: # It really tells them nothing.
253: $r->print('<html><head></head>'.$bodytag.
254: 'Unable to tie hash to db file</body></html>');
255: return OK;
256: }
257: }
258: ##
259: ## Configure hidden fields
260: ##
261: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
262: $ENV{'form.persistent_db_id'}.'" />'."\n";
263: if (exists($ENV{'form.catalogmode'})) {
264: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
265: $ENV{'form.catalogmode'}.'" />'."\n";
266: }
267: if (exists($ENV{'form.form'})) {
268: $hidden_fields .= '<input type="hidden" name="form" value="'.
269: $ENV{'form.form'}.'" />'."\n";
270: }
271: if (exists($ENV{'form.element'})) {
272: $hidden_fields .= '<input type="hidden" name="element" value="'.
273: $ENV{'form.element'}.'" />'."\n";
274: }
275: if (exists($ENV{'form.mode'})) {
276: $hidden_fields .= '<input type="hidden" name="mode" value="'.
277: $ENV{'form.mode'}.'" />'."\n";
278: }
279: ##
280: ## Configure dynamic components of interface
281: ##
282: if ($ENV{'form.catalogmode'} eq 'interactive') {
283: $closebutton="<input type='button' name='close' value='CLOSE' ";
284: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
285: $closebutton .="onClick='parent.close()'";
286: } else {
287: $closebutton .="onClick='self.close()'";
288: }
289: $closebutton .=">\n";
290: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
291: $closebutton="<input type='button' name='close' value='CLOSE' ";
292: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
293: $closebutton .="onClick='parent.close()'";
294: } else {
295: $closebutton .="onClick='self.close()'";
296: }
297: $closebutton .= ">";
298: $importbutton=<<END;
299: <input type='button' name='import' value='IMPORT'
300: onClick='javascript:select_group()'>
301: END
302: } else {
303: $closebutton = '';
304: $importbutton = '';
305: }
306: ##
307: ## Sanity checks on form elements
308: ##
309: if (!defined($ENV{'form.viewselect'})) {
310: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
311: ($ENV{'form.catalogmode'} eq 'interactive')) {
312: $ENV{'form.viewselect'} ="Compact View";
313: } else {
314: $ENV{'form.viewselect'} ="Detailed Citation View";
315: }
316: }
317: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
318: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
319: ##
320: ## Switch on the phase
321: ##
322: if ($ENV{'form.phase'} eq 'disp_basic') {
323: &print_basic_search_form($r,$closebutton);
324: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
325: &print_advanced_search_form($r,$closebutton);
326: } elsif ($ENV{'form.phase'} eq 'results') {
327: &display_results($r,$importbutton,$closebutton);
328: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
329: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
330: &get_persistent_data($persistent_db_file,
331: ['query','customquery','customshow',
332: 'libraries','pretty_string']);
333: if ($ENV{'form.phase'} eq 'sort') {
334: &print_sort_form($r,$pretty_string);
335: } elsif ($ENV{'form.phase'} eq 'run_search') {
336: &run_search($r,$query,$customquery,$customshow,
337: $libraries,$pretty_string);
338: }
339: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
340: ($ENV{'form.phase'} eq 'adv_search')) {
341: $ENV{'form.searchmode'} = 'basic';
342: if ($ENV{'form.phase'} eq 'adv_search') {
343: $ENV{'form.searchmode'} = 'advanced';
344: }
345: # Set up table
346: if (! defined(&create_results_table())) {
347: $r->print(<<END);
348: <html><head><title>Search Error</title></head>
349: $bodytag
350: Unable to create table in which to store search results.
351: The search has been aborted.
352: </body>
353: </html>
354: END
355: return OK;
356: }
357: delete($ENV{'form.launch'});
358: if (! &make_form_data_persistent($r,$persistent_db_file)) {
359: $r->print(<<END);
360: <html><head><title>Search Error</title></head>
361: $bodytag
362: Unable to properly store search information. The search has been aborted.
363: </body>
364: </html>
365: END
366: return OK;
367: }
368: #
369: # We are running a search
370: my ($query,$customquery,$customshow,$libraries) =
371: (undef,undef,undef,undef);
372: my $pretty_string;
373: if ($ENV{'form.phase'} eq 'basic_search') {
374: ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
375: } else { # Advanced search
376: ($query,$customquery,$customshow,$libraries,$pretty_string)
377: = &parse_advanced_search($r,$closebutton);
378: return OK if (! defined($query));
379: }
380: &make_persistent({ query => $query,
381: customquery => $customquery,
382: customshow => $customshow,
383: libraries => $libraries,
384: pretty_string => $pretty_string },
385: $persistent_db_file);
386: ##
387: ## Print out the frames interface
388: ##
389: &print_frames_interface($r);
390: }
391: return OK;
392: }
393:
394: ######################################################################
395: ######################################################################
396:
397: =pod
398:
399: =item &print_basic_search_form()
400:
401: Returns a scalar which holds html for the basic search form.
402:
403: =cut
404:
405: ######################################################################
406: ######################################################################
407:
408: sub print_basic_search_form{
409: my ($r,$closebutton) = @_;
410: my $bodytag=&Apache::loncommon::bodytag('Catalog Search');
411: my $scrout=<<"ENDDOCUMENT";
412: <html>
413: <head>
414: <title>The LearningOnline Network with CAPA</title>
415: <script type="text/javascript">
416: function openhelp(val) {
417: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
418: 'scrollbars=1,width=600,height=300');
419: openhelpwin.focus();
420: }
421: </script>
422: </head>
423: $bodytag
424: <form method="post" action="/adm/searchcat">
425: <input type="hidden" name="phase" value="basic_search" />
426: $hidden_fields
427: <p>
428: Enter terms or phrases separated by AND, OR, or NOT
429: then press SEARCH below.
430: </p>
431: <p>
432: <table>
433: <tr><td>
434: ENDDOCUMENT
435: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
436: ' ';
437: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
438: $scrout.=<<END;
439: </td><td><a href="/adm/searchcat?phase=disp_adv">Advanced Search</a></td></tr>
440: <tr><td>$checkbox use related words</td><td></td></tr>
441: </table>
442: </p>
443: <p>
444: <input type="submit" name="basicsubmit" value='SEARCH' />
445: $closebutton
446: END
447: $scrout.=&selectbox(undef,'viewselect',
448: $ENV{'form.viewselect'},
449: undef,undef,undef,
450: sort(keys(%Views)));
451: $scrout.=&selectbox(undef,'show',
452: $ENV{'form.show'},
453: undef,undef,undef,
454: (10,20,50,100));
455: $scrout.=<<ENDDOCUMENT;
456: per page.
457: </p>
458: </form>
459: </body>
460: </html>
461: ENDDOCUMENT
462: $r->print($scrout);
463: return;
464: }
465: ######################################################################
466: ######################################################################
467:
468: =pod
469:
470: =item &advanced_search_form()
471:
472: Returns a scalar which holds html for the advanced search form.
473:
474: =cut
475:
476: ######################################################################
477: ######################################################################
478:
479: sub print_advanced_search_form{
480: my ($r,$closebutton) = @_;
481: my $advanced_buttons = <<"END";
482: <p>
483: <input type="submit" name="advancedsubmit" value='SEARCH' />
484: <input type="reset" name="reset" value='RESET' />
485: $closebutton
486: <input type="button" value="HELP" onClick="openhelp()" />
487: </p>
488: END
489: if (!defined($ENV{'form.viewselect'})) {
490: $ENV{'form.viewselect'} ="Detailed Citation View";
491: }
492: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
493: my $scrout=<<"ENDHEADER";
494: <html>
495: <head>
496: <title>The LearningOnline Network with CAPA</title>
497: <script type="text/javascript">
498: function openhelp(val) {
499: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
500: 'scrollbars=1,width=600,height=300');
501: openhelpwin.focus();
502: }
503: </script>
504: </head>
505: $bodytag
506: Enter terms or phrases separated by search operators
507: such as AND, OR, or NOT.<br />
508: <form method="post" action="/adm/searchcat">
509: $advanced_buttons
510: $hidden_fields
511: <input type="hidden" name="phase" value="adv_search" />
512: <table>
513: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
514: <td>
515: ENDHEADER
516: $scrout.=&selectbox(undef,'viewselect',
517: $ENV{'form.viewselect'},
518: undef,undef,undef,
519: sort(keys(%Views)));
520: $scrout.=' ';
521: $scrout.=&selectbox(undef,'show',
522: $ENV{'form.show'},
523: undef,undef,undef,
524: (10,20,50,100));
525: $scrout.=' '.
526: '<font color="#800000" face="helvetica">Per Page</font>';
527: $scrout.="</td><td>Related<br />Words</td></tr>\n";
528: $scrout.=&searchphrasefield_with_related('title', 'title' ,
529: $ENV{'form.title'});
530: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
531: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
532: $ENV{'form.subject'});
533: $scrout.=&searchphrasefield_with_related('keywords','keywords',
534: $ENV{'form.keywords'});
535: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
536: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
537: $ENV{'form.notes'});
538: $scrout.=&searchphrasefield_with_related('abstract','abstract',
539: $ENV{'form.abstract'});
540: # Hack - an empty table row.
541: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
542: $scrout.=&searchphrasefield('file<br />extension','mime',
543: $ENV{'form.mime'});
544: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
545: $scrout.=&searchphrasefield('publisher<br />owner','owner',
546: $ENV{'form.owner'});
547: $scrout.="</table>\n";
548: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
549: $scrout.=&selectbox('File Category','category',
550: $ENV{'form.category'},
551: 'any','Any category',
552: undef,
553: (&Apache::loncommon::filecategories()));
554: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
555: #----------------------------------------------------------------
556: # Allow restriction to multiple domains.
557: # I make the crazy assumption that there will never be a domain 'any'.
558: #
559: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
560: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
561: : ($ENV{'form.domains'}) );
562: my %domain_hash = ();
563: foreach (@allowed_domains) {
564: $domain_hash{$_}++;
565: }
566: my @domains =&Apache::loncommon::get_domains();
567: # adjust the size of the select box
568: my $size = 4;
569: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
570: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
571: 'DOMAINS</b></font><br />'.
572: '<select name="domains" size="'.$size.'" multiple>'."\n".
573: '<option name="any" value="any" '.
574: ($domain_hash{'any'}? 'selected ' :'').
575: '>all domains</option>'."\n";
576: foreach my $dom (sort @domains) {
577: $scrout.="<option name=\"$dom\" ".
578: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
579: }
580: $scrout.="</select>\n";
581: #----------------------------------------------------------------
582: $scrout.=&selectbox('Limit by language','language',
583: $ENV{'form.language'},'any','Any Language',
584: \&{Apache::loncommon::languagedescription},
585: (&Apache::loncommon::languageids),
586: );
587: # ------------------------------------------------ Compute date selection boxes
588: $scrout.=<<CREATIONDATESTART;
589: <p>
590: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
591: </font>
592: <br />
593: between:
594: CREATIONDATESTART
595: $scrout.=&dateboxes('creationdatestart',1,1,1976,
596: $ENV{'form.creationdatestart_month'},
597: $ENV{'form.creationdatestart_day'},
598: $ENV{'form.creationdatestart_year'},
599: );
600: $scrout.="and:\n";
601: $scrout.=&dateboxes('creationdateend',12,31,2051,
602: $ENV{'form.creationdateend_month'},
603: $ENV{'form.creationdateend_day'},
604: $ENV{'form.creationdateend_year'},
605: );
606: $scrout.="</p>";
607: $scrout.=<<LASTREVISIONDATESTART;
608: <p>
609: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
610: </b></font>
611: <br />between:
612: LASTREVISIONDATESTART
613: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
614: $ENV{'form.lastrevisiondatestart_month'},
615: $ENV{'form.lastrevisiondatestart_day'},
616: $ENV{'form.lastrevisiondatestart_year'},
617: );
618: $scrout.=<<LASTREVISIONDATEEND;
619: and:
620: LASTREVISIONDATEEND
621: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
622: $ENV{'form.lastrevisiondateend_month'},
623: $ENV{'form.lastrevisiondateend_day'},
624: $ENV{'form.lastrevisiondateend_year'},
625: );
626: $scrout.='</p>';
627: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
628: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
629: $ENV{'form.copyright'},
630: 'any','Any copyright/distribution',
631: \&{Apache::loncommon::copyrightdescription},
632: (&Apache::loncommon::copyrightids),
633: );
634: # ------------------------------------------- Compute customized metadata field
635: # $scrout.=<<CUSTOMMETADATA;
636: #<p>
637: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
638: #</font>
639: #For resource-specific metadata, enter in an expression in the form of
640: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
641: #<b>Example:</b> grandmother=75 OR grandfather=85
642: #<br />
643: #CUSTOMMETADATA
644: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
645: # $scrout.=<<CUSTOMSHOW;
646: #<p>
647: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
648: #</font>
649: #Enter in a space-separated list of special metadata fields to show
650: #in a fielded listing for each record result.
651: #<br />
652: #CUSTOMSHOW
653: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
654: $scrout.=<<ENDDOCUMENT;
655: $advanced_buttons
656: </form>
657: </body>
658: </html>
659: ENDDOCUMENT
660: $r->print($scrout);
661: return;
662: }
663:
664: ######################################################################
665: ######################################################################
666:
667: =pod
668:
669: =item &get_persistent_form_data
670:
671: Inputs: filename of database
672:
673: Outputs: returns undef on database errors.
674:
675: This function is the reverse of &make_persistent() for form data.
676: Retrieve persistent data from %persistent_db. Retrieved items will have their
677: values unescaped. If a form value already exists in $ENV, it will not be
678: overwritten. Form values that are array references may have values appended
679: to them.
680:
681: =cut
682:
683: ######################################################################
684: ######################################################################
685: sub get_persistent_form_data {
686: my $filename = shift;
687: return 0 if (! -e $filename);
688: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
689: &GDBM_READER(),0640));
690: #
691: # These make sure we do not get array references printed out as 'values'.
692: my %arrays_allowed = ('form.category'=>1,'form.domains'=>1);
693: #
694: # Loop through the keys, looking for 'form.'
695: foreach my $name (keys(%persistent_db)) {
696: next if ($name !~ /^form./);
697: next if (exists($ENV{$name}));
698: my @values = map {
699: &Apache::lonnet::unescape($_);
700: } split(',',$persistent_db{$name});
701: next if (@values <1);
702: if ($arrays_allowed{$name}) {
703: $ENV{$name} = [@values];
704: } else {
705: $ENV{$name} = $values[0] if ($values[0]);
706: }
707: }
708: untie (%persistent_db);
709: return 1;
710: }
711: ######################################################################
712: ######################################################################
713:
714: =pod
715:
716: =item &get_persistent_data
717:
718: Inputs: filename of database, ref to array of values to recover.
719:
720: Outputs: array of values. Returns undef on error.
721:
722: This function is the reverse of &make_persistent();
723: Retrieve persistent data from %persistent_db. Retrieved items will have their
724: values unescaped. If the item contains commas (before unescaping), the
725: returned value will be an array pointer.
726:
727: =cut
728:
729: ######################################################################
730: ######################################################################
731: sub get_persistent_data {
732: my $filename = shift;
733: my @Vars = @{shift()};
734: my @Values; # Return array
735: return undef if (! -e $filename);
736: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
737: &GDBM_READER(),0640));
738: foreach my $name (@Vars) {
739: if (! exists($persistent_db{$name})) {
740: push @Values, undef;
741: next;
742: }
743: my @values = map {
744: &Apache::lonnet::unescape($_);
745: } split(',',$persistent_db{$name});
746: if (@values <= 1) {
747: push @Values,$values[0];
748: } else {
749: push @Values,\@values;
750: }
751: }
752: untie (%persistent_db);
753: return @Values;
754: }
755:
756: ######################################################################
757: ######################################################################
758:
759: =pod
760:
761: =item &make_persistent()
762:
763: Inputs: Hash of values to save, filename of persistent database.
764:
765: Store variables away to the %persistent_db.
766: Values will be escaped. Values that are array pointers will have their
767: elements escaped and concatenated in a comma seperated string.
768:
769: =cut
770:
771: ######################################################################
772: ######################################################################
773: sub make_persistent {
774: my %save = %{shift()};
775: my $filename = shift;
776: return undef if (! tie(%persistent_db,'GDBM_File',
777: $filename,&GDBM_WRCREAT(),0640));
778: foreach my $name (keys(%save)) {
779: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
780: # We handle array references, but not recursively.
781: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
782: $persistent_db{$name} = $store;
783: }
784: untie(%persistent_db);
785: return 1;
786: }
787:
788: ######################################################################
789: ######################################################################
790:
791: =pod
792:
793: =item &make_form_data_persistent()
794:
795: Inputs: filename of persistent database.
796:
797: Store most form variables away to the %persistent_db.
798: Values will be escaped. Values that are array pointers will have their
799: elements escaped and concatenated in a comma seperated string.
800:
801: =cut
802:
803: ######################################################################
804: ######################################################################
805: sub make_form_data_persistent {
806: my $r = shift;
807: my $filename = shift;
808: my %save;
809: foreach (keys(%ENV)) {
810: next if (!/^form/ || /submit/);
811: $save{$_} = $ENV{$_};
812: }
813: return &make_persistent(\%save,$filename);
814: }
815:
816: ######################################################################
817: # HTML form building functions #
818: ######################################################################
819:
820: =pod
821:
822: =item HTML form building functions
823:
824: =over 4
825:
826: =cut
827:
828: ###############################################
829: ###############################################
830:
831: =pod
832:
833: =item &simpletextfield()
834:
835: Inputs: $name,$value,$size
836:
837: Returns a text input field with the given name, value, and size.
838: If size is not specified, a value of 20 is used.
839:
840: =cut
841:
842: ###############################################
843: ###############################################
844:
845: sub simpletextfield {
846: my ($name,$value,$size)=@_;
847: $size = 20 if (! defined($size));
848: return '<input type="text" name="'.$name.
849: '" size="'.$size.'" value="'.$value.'" />';
850: }
851:
852: ###############################################
853: ###############################################
854:
855: =pod
856:
857: =item &simplecheckbox()
858:
859: Inputs: $name,$value
860:
861: Returns a simple check box with the given $name.
862: If $value eq 'on' the box is checked.
863:
864: =cut
865:
866: ###############################################
867: ###############################################
868:
869: sub simplecheckbox {
870: my ($name,$value)=@_;
871: my $checked='';
872: $checked="checked" if $value eq 'on';
873: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
874: }
875:
876: ###############################################
877: ###############################################
878:
879: =pod
880:
881: =item &fieldtitle()
882:
883: Input: $title
884:
885: Returns a scalar with html which will display $title as a search
886: field heading.
887:
888: =cut
889:
890: ###############################################
891: ###############################################
892:
893: sub fieldtitle {
894: my $title = uc(shift());
895: return '<font color="#800000" face="helvetica"><b>'.$title.
896: ': </b></font>';
897: }
898:
899: ###############################################
900: ###############################################
901:
902: =pod
903:
904: =item &searchphrasefield()
905:
906: Inputs: $title,$name,$value
907:
908: Returns html for a title line and an input field for entering search terms.
909: The entry field (which is where the $name and $value are used) is a 50 column
910: simpletextfield. The html returned is for a row in a three column table.
911:
912: =cut
913:
914: ###############################################
915: ###############################################
916:
917: sub searchphrasefield {
918: my ($title,$name,$value)=@_;
919: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
920: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
921: }
922:
923: ###############################################
924: ###############################################
925:
926: =pod
927:
928: =item &searchphrasefield_with_related()
929:
930: Inputs: $title,$name,$value
931:
932: Returns html for a title line and an input field for entering search terms
933: and a check box for 'related words'. The entry field (which is where the
934: $name and $value are used) is a 50 column simpletextfield. The name of
935: the related words checkbox is "$name_related".
936:
937: =cut
938:
939: ###############################################
940: ###############################################
941:
942: sub searchphrasefield_with_related {
943: my ($title,$name,$value)=@_;
944: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
945: &simpletextfield($name,$value,50).'</td><td align="center"> '.
946: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
947: " </td></tr>\n";
948: }
949:
950: ###############################################
951: ###############################################
952:
953: =pod
954:
955: =item &dateboxes()
956:
957: Returns html selection form elements for the specification of
958: the day, month, and year.
959:
960: =cut
961:
962: ###############################################
963: ###############################################
964:
965: sub dateboxes {
966: my ($name,$defaultmonth,$defaultday,$defaultyear,
967: $currentmonth,$currentday,$currentyear)=@_;
968: ($defaultmonth,$defaultday,$defaultyear)=('','','');
969: #
970: # Day
971: my $day=<<END;
972: <select name="${name}_day">
973: <option value='$defaultday'> </option>
974: END
975: for (my $i = 1; $i<=31; $i++) {
976: $day.="<option value=\"$i\">$i</option>\n";
977: }
978: $day.="</select>\n";
979: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
980: #
981: # Month
982: my $month=<<END;
983: <select name="${name}_month">
984: <option value='$defaultmonth'> </option>
985: END
986: my $i = 1;
987: foreach (qw/January February March April May June
988: July August September October November December /){
989: $month .="<option value=\"$i\">$_</option>\n";
990: $i++;
991: }
992: $month.="</select>\n";
993: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
994: #
995: # Year (obviously)
996: my $year=<<END;
997: <select name="${name}_year">
998: <option value='$defaultyear'> </option>
999: END
1000: my $maxyear = 2051;
1001: for (my $i = 1976; $i<=$maxyear; $i++) {
1002: $year.="<option value=\"$i\">$i</option>\n";
1003: }
1004: $year.="</select>\n";
1005: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
1006: return "$month$day$year";
1007: }
1008:
1009: ###############################################
1010: ###############################################
1011:
1012: =pod
1013:
1014: =item &selectbox()
1015:
1016: Returns a scalar containing an html <select> form.
1017:
1018: Inputs:
1019:
1020: =over 4
1021:
1022: =item $title
1023:
1024: Printed above the select box, in uppercase. If undefined, only a select
1025: box will be returned, with no additional html.
1026:
1027: =item $name
1028:
1029: The name element of the <select> tag.
1030:
1031: =item $default
1032:
1033: The default value of the form. Can be $anyvalue, or in @idlist.
1034:
1035: =item $anyvalue
1036:
1037: The <option value="..."> used to indicate a default of
1038: none of the values. Can be undef.
1039:
1040: =item $anytag
1041:
1042: The text associate with $anyvalue above.
1043:
1044: =item $functionref
1045:
1046: Each element in @idlist will be passed as a parameter
1047: to the function referenced here. The return value of the function should
1048: be a scalar description of the items. If this value is undefined the
1049: description of each item in @idlist will be the item name.
1050:
1051: =item @idlist
1052:
1053: The items to be selected from. One of these or $anyvalue will be the
1054: value returned by the form element, $ENV{form.$name}.
1055:
1056: =back
1057:
1058: =cut
1059:
1060: ###############################################
1061:
1062: sub selectbox {
1063: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
1064: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
1065: my $selout='';
1066: if (defined($title)) {
1067: my $uctitle=uc($title);
1068: $selout="\n".'<p><font color="#800000" face="helvetica">'.
1069: '<b>'.$uctitle.': </b></font>';
1070: }
1071: $selout .= '<select name="'.$name.'">';
1072: unshift @idlist,$anyvalue if (defined($anyvalue));
1073: foreach (@idlist) {
1074: $selout.='<option value="'.$_.'"';
1075: if ($_ eq $default and !/^any$/) {
1076: $selout.=' selected >'.&{$functionref}($_).'</option>';
1077: }
1078: elsif ($_ eq $default and /^$anyvalue$/) {
1079: $selout.=' selected >'.$anytag.'</option>';
1080: }
1081: else {$selout.='>'.&{$functionref}($_).'</option>';}
1082: }
1083: return $selout.'</select>'.(defined($title)?'</p>':' ');
1084: }
1085:
1086: ######################################################################
1087: # End of HTML form building functions #
1088: ######################################################################
1089:
1090: =pod
1091:
1092: =back
1093:
1094: =cut
1095:
1096:
1097: ######################################################################
1098: ######################################################################
1099:
1100: =pod
1101:
1102: =item &parse_advanced_search()
1103:
1104: Parse advanced search form and return the following:
1105:
1106: =over 4
1107:
1108: =item $query Scalar containing an SQL query.
1109:
1110: =item $customquery Scalar containing a custom query.
1111:
1112: =item $customshow Scalar containing commands to show custom metadata.
1113:
1114: =item $libraries_to_query Reference to array of domains to search.
1115:
1116: =back
1117:
1118: =cut
1119:
1120: ######################################################################
1121: ######################################################################
1122: sub parse_advanced_search {
1123: my ($r,$closebutton)=@_;
1124: my $fillflag=0;
1125: my $pretty_search_string = "<br />\n";
1126: # Clean up fields for safety
1127: for my $field ('title','author','subject','keywords','url','version',
1128: 'creationdatestart_month','creationdatestart_day',
1129: 'creationdatestart_year','creationdateend_month',
1130: 'creationdateend_day','creationdateend_year',
1131: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1132: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1133: 'lastrevisiondateend_day','lastrevisiondateend_year',
1134: 'notes','abstract','mime','language','owner',
1135: 'custommetadata','customshow','category') {
1136: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1137: }
1138: foreach ('mode','form','element') {
1139: # is this required? Hmmm.
1140: next unless (exists($ENV{"form.$_"}));
1141: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1142: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1143: }
1144: # Preprocess the category form element.
1145: $ENV{'form.category'} = 'any' if (ref($ENV{'form.category'}));
1146: if ($ENV{'form.category'} ne 'any') {
1147: my @extensions = &Apache::loncommon::filecategorytypes
1148: ($ENV{'form.category'});
1149: $ENV{'form.mime'} = join ' OR ',@extensions;
1150: }
1151: # Check to see if enough information was filled in
1152: for my $field ('title','author','subject','keywords','url','version',
1153: 'notes','abstract','mime','language','owner',
1154: 'custommetadata') {
1155: if (&filled($ENV{"form.$field"})) {
1156: $fillflag++;
1157: }
1158: }
1159: unless ($fillflag) {
1160: &output_blank_field_error($r,$closebutton,'phase=disp_adv');
1161: return ;
1162: }
1163: # Turn the form input into a SQL-based query
1164: my $query='';
1165: my @queries;
1166: my $font = '<font color="#800000" face="helvetica">';
1167: # Evaluate logical expression AND/OR/NOT phrase fields.
1168: foreach my $field ('title','author','subject','notes','abstract','url',
1169: 'keywords','version','owner','mime') {
1170: if ($ENV{'form.'.$field}) {
1171: my $searchphrase = $ENV{'form.'.$field};
1172: $pretty_search_string .= $font."$field</font> contains <b>".
1173: $searchphrase."</b>";
1174: if ($ENV{'form.'.$field.'_related'}) {
1175: my @New_Words;
1176: ($searchphrase,@New_Words) = &related_version($searchphrase);
1177: if (@New_Words) {
1178: $pretty_search_string .= " with related words: ".
1179: "<b>@New_Words</b>.";
1180: } else {
1181: $pretty_search_string .= " with no related words.";
1182: }
1183: }
1184: $pretty_search_string .= "<br />\n";
1185: push @queries,&build_SQL_query($field,$searchphrase);
1186: }
1187: }
1188: # I dislike the hack below.
1189: if ($ENV{'form.category'}) {
1190: $ENV{'form.mime'}='';
1191: }
1192: # Evaluate option lists
1193: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1194: push @queries,"(language like \"$ENV{'form.language'}\")";
1195: $pretty_search_string.=$font."language</font>= ".
1196: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1197: "<br />\n";
1198: }
1199: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1200: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1201: $pretty_search_string.=$font."copyright</font> = ".
1202: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1203: "<br \>\n";
1204: }
1205: #
1206: # Evaluate date windows
1207: my $datequery=&build_date_queries(
1208: $ENV{'form.creationdatestart_month'},
1209: $ENV{'form.creationdatestart_day'},
1210: $ENV{'form.creationdatestart_year'},
1211: $ENV{'form.creationdateend_month'},
1212: $ENV{'form.creationdateend_day'},
1213: $ENV{'form.creationdateend_year'},
1214: $ENV{'form.lastrevisiondatestart_month'},
1215: $ENV{'form.lastrevisiondatestart_day'},
1216: $ENV{'form.lastrevisiondatestart_year'},
1217: $ENV{'form.lastrevisiondateend_month'},
1218: $ENV{'form.lastrevisiondateend_day'},
1219: $ENV{'form.lastrevisiondateend_year'},
1220: );
1221: # Test to see if date windows are legitimate
1222: if ($datequery=~/^Incorrect/) {
1223: &output_date_error($r,$datequery,$closebutton);
1224: return ;
1225: } elsif ($datequery) {
1226: # Here is where you would set up pretty_search_string to output
1227: # date query information.
1228: push @queries,$datequery;
1229: }
1230: # Process form information for custom metadata querying
1231: my $customquery=undef;
1232: # if ($ENV{'form.custommetadata'}) {
1233: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1234: # $ENV{'form.custommetadata'}."</b><br />\n";
1235: # $customquery=&build_custommetadata_query('custommetadata',
1236: # $ENV{'form.custommetadata'});
1237: # }
1238: my $customshow=undef;
1239: # if ($ENV{'form.customshow'}) {
1240: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1241: # $ENV{'form.customshow'}."</b><br />\n";
1242: # $customshow=$ENV{'form.customshow'};
1243: # $customshow=~s/[^\w\s]//g;
1244: # my @fields=split(/\s+/,$customshow);
1245: # $customshow=join(" ",@fields);
1246: # }
1247: ## ---------------------------------------------------------------
1248: ## Deal with restrictions to given domains
1249: ##
1250: my $libraries_to_query = undef;
1251: # $ENV{'form.domains'} can be either a scalar or an array reference.
1252: # We need an array.
1253: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1254: : ($ENV{'form.domains'}) );
1255: my %domain_hash = ();
1256: my $pretty_domains_string;
1257: foreach (@allowed_domains) {
1258: $domain_hash{$_}++;
1259: }
1260: if ($domain_hash{'any'}) {
1261: $pretty_domains_string = "In all LON-CAPA domains.";
1262: } else {
1263: if (@allowed_domains > 1) {
1264: $pretty_domains_string = "In LON-CAPA domains:";
1265: } else {
1266: $pretty_domains_string = "In LON-CAPA domain ";
1267: }
1268: foreach (sort @allowed_domains) {
1269: $pretty_domains_string .= "<b>".$_."</b> ";
1270: }
1271: foreach (keys(%Apache::lonnet::libserv)) {
1272: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1273: push @$libraries_to_query,$_;
1274: }
1275: }
1276: }
1277: $pretty_search_string .= $pretty_domains_string."<br />\n";
1278: #
1279: if (@queries) {
1280: $query=join(" AND ",@queries);
1281: $query="select * from metadata where $query";
1282: } elsif ($customquery) {
1283: $query = '';
1284: }
1285: return ($query,$customquery,$customshow,$libraries_to_query,
1286: $pretty_search_string);
1287: }
1288:
1289: ######################################################################
1290: ######################################################################
1291:
1292: =pod
1293:
1294: =item &parse_basic_search()
1295:
1296: Parse the basic search form and return a scalar containing an sql query.
1297:
1298: =cut
1299:
1300: ######################################################################
1301: ######################################################################
1302: sub parse_basic_search {
1303: my ($r,$closebutton)=@_;
1304: # Clean up fields for safety
1305: for my $field ('basicexp') {
1306: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1307: }
1308: foreach ('mode','form','element') {
1309: # is this required? Hmmm.
1310: next unless (exists($ENV{"form.$_"}));
1311: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1312: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1313: }
1314:
1315: # Check to see if enough is filled in
1316: unless (&filled($ENV{'form.basicexp'})) {
1317: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1318: return OK;
1319: }
1320: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1321: my $search_string = $ENV{'form.basicexp'};
1322: if ($ENV{'form.related'}) {
1323: my @New_Words;
1324: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1325: if (@New_Words) {
1326: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1327: } else {
1328: $pretty_search_string .= " with no related words.";
1329: }
1330: }
1331: # Build SQL query string based on form page
1332: my $query='';
1333: my $concatarg=join('," ",',
1334: ('title', 'author', 'subject', 'notes', 'abstract',
1335: 'keywords'));
1336: $concatarg='title' if $ENV{'form.titleonly'};
1337: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1338: $pretty_search_string .= "<br />\n";
1339: return 'select * from metadata where '.$query,$pretty_search_string;
1340: }
1341:
1342:
1343: ######################################################################
1344: ######################################################################
1345:
1346: =pod
1347:
1348: =item &related_version
1349:
1350: Modifies an input string to include related words. Words in the string
1351: are replaced with parenthesized lists of 'OR'd words. For example
1352: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1353:
1354: Note: Using this twice on a string is probably silly.
1355:
1356: =cut
1357:
1358: ######################################################################
1359: ######################################################################
1360: sub related_version {
1361: my $search_string = shift;
1362: my $result = $search_string;
1363: my %New_Words = ();
1364: while ($search_string =~ /(\w+)/cg) {
1365: my $word = $1;
1366: next if (lc($word) =~ /\b(or|and|not)\b/);
1367: my @Words = &Apache::loncommon::get_related_words($word);
1368: @Words = ($#Words>4? @Words[0..4] : @Words);
1369: foreach (@Words) { $New_Words{$_}++;}
1370: my $replacement = join " OR ", ($word,@Words);
1371: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1372: }
1373: return $result,sort(keys(%New_Words));
1374: }
1375:
1376: ######################################################################
1377: ######################################################################
1378:
1379: =pod
1380:
1381: =item &build_SQL_query()
1382:
1383: Builds a SQL query string from a logical expression with AND/OR keywords
1384: using Text::Query and &recursive_SQL_query_builder()
1385:
1386: =cut
1387:
1388: ######################################################################
1389: ######################################################################
1390: sub build_SQL_query {
1391: my ($field_name,$logic_statement)=@_;
1392: my $q=new Text::Query('abc',
1393: -parse => 'Text::Query::ParseAdvanced',
1394: -build => 'Text::Query::Build');
1395: $q->prepare($logic_statement);
1396: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1397: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1398: return $sql_query;
1399: }
1400:
1401: ######################################################################
1402: ######################################################################
1403:
1404: =pod
1405:
1406: =item &build_custommetadata_query()
1407:
1408: Constructs a custom metadata query using a rather heinous regular
1409: expression.
1410:
1411: =cut
1412:
1413: ######################################################################
1414: ######################################################################
1415: sub build_custommetadata_query {
1416: my ($field_name,$logic_statement)=@_;
1417: my $q=new Text::Query('abc',
1418: -parse => 'Text::Query::ParseAdvanced',
1419: -build => 'Text::Query::BuildAdvancedString');
1420: $q->prepare($logic_statement);
1421: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1422: # quick fix to change literal into xml tag-matching
1423: # will eventually have to write a separate builder module
1424: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1425: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1426: /\\<$1\\>?# \<wordone\>
1427: \[\^\\<\]?# [^\<]
1428: \*$2\[\^\\<\]?# *wordtwo[^\<]
1429: \*\\<\\\/$1\\>?# *\<\/wordone\>
1430: /g;
1431: return $matchexp;
1432: }
1433:
1434: ######################################################################
1435: ######################################################################
1436:
1437: =pod
1438:
1439: =item &recursive_SQL_query_build()
1440:
1441: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1442:
1443: =cut
1444:
1445: ######################################################################
1446: ######################################################################
1447: sub recursive_SQL_query_build {
1448: my ($dkey,$pattern)=@_;
1449: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1450: return $pattern unless @matches;
1451: foreach my $match (@matches) {
1452: $match=~/\[ (\w+)\s(.*) \]/;
1453: my ($key,$value)=($1,$2);
1454: my $replacement='';
1455: if ($key eq 'literal') {
1456: $replacement="($dkey like \"\%$value\%\")";
1457: }
1458: elsif ($key eq 'not') {
1459: $value=~s/like/not like/;
1460: # $replacement="($dkey not like $value)";
1461: $replacement="$value";
1462: }
1463: elsif ($key eq 'and') {
1464: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1465: $replacement="($1 AND $2)";
1466: }
1467: elsif ($key eq 'or') {
1468: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1469: $replacement="($1 OR $2)";
1470: }
1471: substr($pattern,
1472: index($pattern,$match),
1473: length($match),
1474: $replacement
1475: );
1476: }
1477: &recursive_SQL_query_build($dkey,$pattern);
1478: }
1479:
1480: ######################################################################
1481: ######################################################################
1482:
1483: =pod
1484:
1485: =item &build_date_queries()
1486:
1487: Builds a SQL logic query to check time/date entries.
1488: Also reports errors (check for /^Incorrect/).
1489:
1490: =cut
1491:
1492: ######################################################################
1493: ######################################################################
1494: sub build_date_queries {
1495: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1496: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1497: my @queries;
1498: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1499: unless ($cmonth1 and $cday1 and $cyear1 and
1500: $cmonth2 and $cday2 and $cyear2) {
1501: return "Incorrect entry for the creation date. You must specify ".
1502: "a starting month, day, and year and an ending month, ".
1503: "day, and year.";
1504: }
1505: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1506: $cnumeric1+=0;
1507: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1508: $cnumeric2+=0;
1509: if ($cnumeric1>$cnumeric2) {
1510: return "Incorrect entry for the creation date. The starting ".
1511: "date must occur before the ending date.";
1512: }
1513: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1514: "$cyear2-$cmonth2-$cday2 23:59:59')";
1515: push @queries,$cquery;
1516: }
1517: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1518: unless ($lmonth1 and $lday1 and $lyear1 and
1519: $lmonth2 and $lday2 and $lyear2) {
1520: return "Incorrect entry for the last revision date. You must ".
1521: "specify a starting month, day, and year and an ending ".
1522: "month, day, and year.";
1523: }
1524: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1525: $lnumeric1+=0;
1526: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1527: $lnumeric2+=0;
1528: if ($lnumeric1>$lnumeric2) {
1529: return "Incorrect entry for the last revision date. The ".
1530: "starting date must occur before the ending date.";
1531: }
1532: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1533: "$lyear2-$lmonth2-$lday2 23:59:59')";
1534: push @queries,$lquery;
1535: }
1536: if (@queries) {
1537: return join(" AND ",@queries);
1538: }
1539: return '';
1540: }
1541:
1542: ######################################################################
1543: ######################################################################
1544:
1545: =pod
1546:
1547: =item ©right_check()
1548:
1549: =cut
1550:
1551: ######################################################################
1552: ######################################################################
1553: sub copyright_check {
1554: my $Metadata = shift;
1555: # Check copyright tags and skip results the user cannot use
1556: my (undef,undef,$resdom,$resname) = split('/',
1557: $Metadata->{'url'});
1558: # Check for priv
1559: if (($Metadata->{'copyright'} eq 'priv') &&
1560: (($ENV{'user.name'} ne $resname) &&
1561: ($ENV{'user.domain'} ne $resdom))) {
1562: return 0;
1563: }
1564: # Check for domain
1565: if (($Metadata->{'copyright'} eq 'domain') &&
1566: ($ENV{'user.domain'} ne $resdom)) {
1567: return 0;
1568: }
1569: return 1;
1570: }
1571:
1572:
1573: ######################################################################
1574: ######################################################################
1575:
1576: =pod
1577:
1578: =item &ensure_db_and_table
1579:
1580: Ensure we can get lonmysql to connect to the database and the table we
1581: need exists.
1582:
1583: Inputs: $r, table id
1584:
1585: Returns: undef on error, 1 if the table exists.
1586:
1587: =cut
1588:
1589: ######################################################################
1590: ######################################################################
1591: sub ensure_db_and_table {
1592: my ($r,$table) = @_;
1593: ##
1594: ## Sanity check the table id.
1595: ##
1596: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1597: $r->print("Unable to retrieve search results. ".
1598: "Unable to determine the table results were stored in. ".
1599: "</body></html>");
1600: return undef;
1601: }
1602: ##
1603: ## Make sure we can connect and the table exists.
1604: ##
1605: my $connection_result = &Apache::lonmysql::connect_to_db();
1606: if (!defined($connection_result)) {
1607: $r->print("Unable to connect to the MySQL database where your results".
1608: " are stored. </body></html>");
1609: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1610: " connect to database.");
1611: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1612: return undef;
1613: }
1614: my $table_check = &Apache::lonmysql::check_table($table);
1615: if (! defined($table_check)) {
1616: $r->print("A MySQL error has occurred.</form></body></html>");
1617: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1618: " of table ".$table);
1619: return undef;
1620: } elsif (! $table_check) {
1621: $r->print("The table of results could not be found.");
1622: &Apache::lonnet::logthis("The user requested a table, ".$table.
1623: ", that could not be found.");
1624: return undef;
1625: }
1626: return 1;
1627: }
1628:
1629: ######################################################################
1630: ######################################################################
1631:
1632: =pod
1633:
1634: =item &print_sort_form
1635:
1636: =cut
1637:
1638: ######################################################################
1639: ######################################################################
1640: sub print_sort_form {
1641: my ($r,$pretty_query_string) = @_;
1642: ##
1643: my %SortableFields =
1644: (id => 'Default',
1645: title => 'Title',
1646: author => 'Author',
1647: subject => 'Subject',
1648: url => 'URL',
1649: version => 'Version Number',
1650: mime => 'Mime type',
1651: lang => 'Language',
1652: owner => 'Owner/Publisher',
1653: copyright => 'Copyright',
1654: hostname => 'Host',
1655: creationdate => 'Creation Date',
1656: lastrevisiondate => 'Revision Date',
1657: );
1658: ##
1659: my $table = $ENV{'form.table'};
1660: return if (! &ensure_db_and_table($r,$table));
1661: ##
1662: ## Get the number of results
1663: ##
1664: my $total_results = &Apache::lonmysql::number_of_rows($table);
1665: if (! defined($total_results)) {
1666: $r->print("A MySQL error has occurred.</form></body></html>");
1667: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1668: " of rows in table ".$table);
1669: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1670: return;
1671: }
1672: my $result;
1673: $result.=<<END;
1674: <html>
1675: <head>
1676: <script>
1677: function change_sort() {
1678: var newloc = "/adm/searchcat?phase=results";
1679: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1680: newloc += "&sortby=";
1681: newloc += document.forms.statusform.elements.sortby.value;
1682: parent.resultsframe.location= newloc;
1683: }
1684: </script>
1685: <title>Results</title>
1686: </head>
1687: $bodytag
1688: <form name="statusform" action="" method="post">
1689: <input type="hidden" name="Queue" value="" />
1690: END
1691:
1692: #<h2>Sort Results</h2>
1693: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1694: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1695: # foreach (keys(%SortableFields)) {
1696: # $result.="<option name=\"$_\"";
1697: # if ($_ eq $ENV{'form.sortby'}) {
1698: # $result.=" selected ";
1699: # }
1700: # $result.=" >$SortableFields{$_}</option>\n";
1701: # }
1702: # $result.="</select>\n";
1703: my $revise = &revise_button();
1704: $result.=<<END;
1705: <p>
1706: There are $total_results matches to your query. $revise
1707: </p><p>
1708: Search:$pretty_query_string
1709: </p>
1710: </form>
1711: </body>
1712: </html>
1713: END
1714: $r->print($result);
1715: return;
1716: }
1717:
1718: #####################################################################
1719: #####################################################################
1720:
1721: =pod
1722:
1723: =item MySQL Table Description
1724:
1725: MySQL table creation requires a precise description of the data to be
1726: stored. The use of the correct types to hold data is vital to efficient
1727: storage and quick retrieval of records. The columns must be described in
1728: the following format:
1729:
1730: =cut
1731:
1732: ##
1733: ## Restrictions:
1734: ## columns of type 'text' and 'blob' cannot have defaults.
1735: ## columns of type 'enum' cannot be used for FULLTEXT.
1736: ##
1737: my @DataOrder = qw/id title author subject url keywords version notes
1738: abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
1739:
1740: my %Datatypes =
1741: ( id =>{ type => 'MEDIUMINT',
1742: restrictions => 'UNSIGNED NOT NULL',
1743: primary_key => 'yes',
1744: auto_inc => 'yes'
1745: },
1746: title =>{ type=>'TEXT'},
1747: author =>{ type=>'TEXT'},
1748: subject =>{ type=>'TEXT'},
1749: url =>{ type=>'TEXT',
1750: restrictions => 'NOT NULL' },
1751: keywords =>{ type=>'TEXT'},
1752: version =>{ type=>'TEXT'},
1753: notes =>{ type=>'TEXT'},
1754: abstract =>{ type=>'TEXT'},
1755: mime =>{ type=>'TEXT'},
1756: lang =>{ type=>'TEXT'},
1757: owner =>{ type=>'TEXT'},
1758: copyright =>{ type=>'TEXT'},
1759: hostname =>{ type=>'TEXT'},
1760: #--------------------------------------------------
1761: creationdate =>{ type=>'DATETIME'},
1762: lastrevisiondate =>{ type=>'DATETIME'},
1763: #--------------------------------------------------
1764: );
1765:
1766: my @Fullindicies =
1767: qw/title/;
1768: # qw/title author subject abstract mime language owner copyright/;
1769:
1770: ######################################################################
1771: ######################################################################
1772:
1773: =pod
1774:
1775: =item &create_results_table()
1776:
1777: Creates the table of search results by calling lonmysql. Stores the
1778: table id in $ENV{'form.table'}
1779:
1780: Inputs: none.
1781:
1782: Returns: the identifier of the table on success, undef on error.
1783:
1784: =cut
1785:
1786: ######################################################################
1787: ######################################################################
1788: sub create_results_table {
1789: my $table = &Apache::lonmysql::create_table
1790: ( { columns => \%Datatypes,
1791: column_order => \@DataOrder,
1792: fullindex => \@Fullindicies,
1793: } );
1794: if (defined($table)) {
1795: $ENV{'form.table'} = $table;
1796: return $table;
1797: }
1798: return undef; # Error...
1799: }
1800:
1801: ######################################################################
1802: ######################################################################
1803:
1804: =pod
1805:
1806: =item Search Status update functions
1807:
1808: Each of the following functions changes the values of one of the
1809: input fields used to display the search status to the user. The names
1810: should be explanatory.
1811:
1812: Inputs: Apache request handler ($r), text to display.
1813:
1814: Returns: Nothing.
1815:
1816: =over 4
1817:
1818: =item &update_count_status()
1819:
1820: =item &update_status()
1821:
1822: =item &update_seconds()
1823:
1824: =back
1825:
1826: =cut
1827:
1828: ######################################################################
1829: ######################################################################
1830: sub update_count_status {
1831: my ($r,$text) = @_;
1832: $text =~ s/\'/\\\'/g;
1833: $r->print
1834: ("<script>document.statusform.count.value = ' $text'</script>\n");
1835: $r->rflush();
1836: }
1837:
1838: sub update_status {
1839: my ($r,$text) = @_;
1840: $text =~ s/\'/\\\'/g;
1841: $r->print
1842: ("<script>document.statusform.status.value = ' $text'</script>\n");
1843: $r->rflush();
1844: }
1845:
1846: sub update_seconds {
1847: my ($r,$text) = @_;
1848: $text =~ s/\'/\\\'/g;
1849: $r->print
1850: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1851: $r->rflush();
1852: }
1853:
1854: ######################################################################
1855: ######################################################################
1856:
1857: =pod
1858:
1859: =item &revise_button
1860:
1861: Inputs: None
1862:
1863: Returns: html string for a 'revise search' button.
1864:
1865: =cut
1866:
1867: ######################################################################
1868: ######################################################################
1869: sub revise_button {
1870: my $revise_phase = 'disp_basic';
1871: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1872: my $newloc = '/adm/searchcat'.
1873: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1874: '&phase='.$revise_phase;
1875: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1876: qq{ onClick="parent.location='$newloc';" /> };
1877: return $result;
1878: }
1879:
1880: ######################################################################
1881: ######################################################################
1882:
1883: =pod
1884:
1885: =item &run_search
1886:
1887: =cut
1888:
1889: ######################################################################
1890: ######################################################################
1891: sub run_search {
1892: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1893: my $connection = $r->connection;
1894: #
1895: # Timing variables
1896: #
1897: my $starttime = time;
1898: my $max_time = 30; # seconds for the search to complete
1899: #
1900: # Print run_search header
1901: #
1902: $r->print(<<END);
1903: <html>
1904: <head><title>Search Status</title></head>
1905: $bodytag
1906: <form name="statusform" action="" method="post">
1907: <input type="hidden" name="Queue" value="" />
1908: END
1909: # Check to see if $pretty_string has more than one carriage return.
1910: # Assume \n s are following <br /> s and truncate the value.
1911: # (there is probably a better way)...
1912: my @Lines = split /<br \/>/,$pretty_string;
1913: if (@Lines > 2) {
1914: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1915: }
1916: $r->print("Search: ".$pretty_string);
1917: $r->rflush();
1918: #
1919: # Determine the servers we need to contact.
1920: #
1921: my @Servers_to_contact;
1922: if (defined($serverlist)) {
1923: if (ref($serverlist) eq 'ARRAY') {
1924: @Servers_to_contact = @$serverlist;
1925: } else {
1926: @Servers_to_contact = ($serverlist);
1927: }
1928: } else {
1929: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1930: }
1931: my %Server_status;
1932: my $table =$ENV{'form.table'};
1933: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1934: $r->print("Unable to determine table id to store search results in.".
1935: "The search has been aborted.</body></html>");
1936: return;
1937: }
1938: my $table_status = &Apache::lonmysql::check_table($table);
1939: if (! defined($table_status)) {
1940: $r->print("Unable to determine status of table.</body></html>");
1941: &Apache::lonnet::logthis("Bogus table id of $table for ".
1942: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1943: &Apache::lonnet::logthis("lonmysql error = ".
1944: &Apache::lonmysql::get_error());
1945: return;
1946: }
1947: if (! $table_status) {
1948: $r->print("The table id,$table, we tried to use is invalid.".
1949: "The search has been aborted.</body></html>");
1950: return;
1951: }
1952: ##
1953: ## Prepare for the big loop.
1954: ##
1955: my $hitcountsum;
1956: my $server;
1957: my $status;
1958: my $revise = &revise_button();
1959: $r->print(<<END);
1960: <table>
1961: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1962: <tr>
1963: <td><input type="text" name="status" value="" size="30" /></td>
1964: <td><input type="text" name="count" value="" size="10" /></td>
1965: <td><input type="text" name="seconds" value="" size="8" /></td>
1966: <td>$revise</td>
1967: </tr>
1968: </table>
1969: </form>
1970: END
1971: $r->rflush();
1972: my $time_remaining = $max_time - (time - $starttime) ;
1973: my $last_time = $time_remaining;
1974: &update_seconds($r,$time_remaining);
1975: while (($time_remaining > 0) &&
1976: ((@Servers_to_contact) || keys(%Server_status))) {
1977: # Send out a search request if it needs to be done.
1978: if (@Servers_to_contact) {
1979: # Contact one server
1980: my $server = shift(@Servers_to_contact);
1981: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1982: $customshow,[$server]);
1983: ($server) = keys(%$reply);
1984: $Server_status{$server} = $reply->{$server};
1985: &update_status($r,'contacting '.$server);
1986: } else {
1987: # wait a sec. to give time for files to be written
1988: # This sleep statement is here instead of outside the else
1989: # block because we do not want to pause if we have servers
1990: # left to contact.
1991: sleep(1);
1992: }
1993: &update_status($r,'waiting on '.(join(' ',keys(%Server_status))));
1994: while (my ($server,$status) = each(%Server_status)) {
1995: last if ($connection->aborted());
1996: if ($status eq 'con_lost') {
1997: delete ($Server_status{$server});
1998: next;
1999: }
2000: $status=~/^([\.\w]+)$/;
2001: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2002: if (-e $datafile && ! -e "$datafile.end") {
2003: &update_status($r,'Receiving results from '.$server);
2004: next;
2005: }
2006: last if ($connection->aborted());
2007: if (-e "$datafile.end") {
2008: &update_status($r,'Reading results from '.$server);
2009: if (-z "$datafile") {
2010: delete($Server_status{$server});
2011: next;
2012: }
2013: my $fh;
2014: if (!($fh=Apache::File->new($datafile))) {
2015: $r->print("Unable to open search results file for ".
2016: "server $server. Omitting from search");
2017: delete($Server_status{$server});
2018: next;
2019: }
2020: # Read in the whole file.
2021: while (my $result = <$fh>) {
2022: last if ($connection->aborted());
2023: # handle custom fields? Someday we will!
2024: chomp($result);
2025: next unless $result;
2026: # Parse the result.
2027: my %Fields = &parse_raw_result($result,$server);
2028: $Fields{'hostname'} = $server;
2029: next if (! ©right_check(\%Fields));
2030: # Store the result in the mysql database
2031: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2032: if (! defined($result)) {
2033: $r->print(&Apache::lonmysql::get_error());
2034: }
2035: # $r->print(&Apache::lonmysql::get_debug());
2036: $hitcountsum ++;
2037: $time_remaining = $max_time - (time - $starttime) ;
2038: if ($last_time - $time_remaining > 0) {
2039: &update_seconds($r,$time_remaining);
2040: $last_time = $time_remaining;
2041: }
2042: if ($hitcountsum % 50 == 0) {
2043: &update_count_status($r,$hitcountsum);
2044: }
2045: } # End of foreach (@results)
2046: $fh->close();
2047: # $server is only deleted if the results file has been
2048: # found and (successfully) opened. This may be a bad idea.
2049: delete($Server_status{$server});
2050: }
2051: last if ($connection->aborted());
2052: &update_count_status($r,$hitcountsum);
2053: }
2054: last if ($connection->aborted());
2055: # Finished looping through the servers
2056: $time_remaining = $max_time - (time - $starttime) ;
2057: if ($last_time - $time_remaining > 0) {
2058: $last_time = $time_remaining;
2059: &update_seconds($r,$time_remaining);
2060: }
2061: }
2062: &update_status($r,'Search Complete'.$server);
2063: &update_seconds($r,0);
2064: &Apache::lonmysql::disconnect_from_db();
2065: # We have run out of time or run out of servers to talk to and
2066: # results to get.
2067: $r->print("</body></html>");
2068: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2069: $r->print("<script>".
2070: "window.location='/adm/searchcat?".
2071: "phase=sort&".
2072: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2073: "</script>");
2074: }
2075: return;
2076: }
2077:
2078: ######################################################################
2079: ######################################################################
2080: =pod
2081:
2082: =item &prev_next_buttons
2083:
2084: =cut
2085:
2086: ######################################################################
2087: ######################################################################
2088: sub prev_next_buttons {
2089: my ($current_min,$show,$total,$parms) = @_;
2090: return '' if ($show eq 'all'); # No links if you get them all at once.
2091: my $links;
2092: ##
2093: ## Prev
2094: my $prev_min = $current_min - $show;
2095: $prev_min = 1 if $prev_min < 1;
2096: if ($prev_min < $current_min) {
2097: $links .= qq{
2098: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2099: };
2100: } else {
2101: $links .= 'prev';
2102: }
2103: ##
2104: ## Pages.... Someday.
2105: ##
2106: $links .= qq{
2107: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2108: };
2109: ##
2110: ## Next
2111: my $next_min = $current_min + $show;
2112: $next_min = $current_min if ($next_min > $total);
2113: if ($next_min != $current_min) {
2114: $links .= qq{
2115: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2116: };
2117: } else {
2118: $links .= ' next';
2119: }
2120: return $links;
2121: }
2122: ######################################################################
2123: ######################################################################
2124:
2125: =pod
2126:
2127: =item &display_results
2128:
2129: =cut
2130:
2131: ######################################################################
2132: ######################################################################
2133: sub display_results {
2134: my ($r,$importbutton,$closebutton) = @_;
2135: my $connection = $r->connection;
2136: $r->print(&search_results_header($importbutton,$closebutton));
2137: ##
2138: ## Set viewing function
2139: ##
2140: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2141: if (!defined($viewfunction)) {
2142: $r->print("Internal Error - Bad view selected.\n");
2143: $r->rflush();
2144: return;
2145: }
2146: ##
2147: ## Get the catalog controls setup
2148: ##
2149: my $action = "/adm/searchcat?phase=results";
2150: ##
2151: ## Deal with groupsearch
2152: ##
2153: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2154: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2155: &GDBM_WRCREAT(),0640)) {
2156: $r->print('Unable to store import results.</form></body></html>');
2157: $r->rflush();
2158: return;
2159: }
2160: }
2161: ##
2162: ## Prepare the table for querying
2163: ##
2164: my $table = $ENV{'form.table'};
2165: return if (! &ensure_db_and_table($r,$table));
2166: ##
2167: ## Get the number of results
2168: ##
2169: my $total_results = &Apache::lonmysql::number_of_rows($table);
2170: if (! defined($total_results)) {
2171: $r->print("A MySQL error has occurred.</form></body></html>");
2172: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2173: " of rows in table ".$table);
2174: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2175: return;
2176: }
2177: ##
2178: ## Determine how many results we need to get
2179: ##
2180: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2181: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2182: my $min = $ENV{'form.start'};
2183: my $max;
2184: if ($ENV{'form.show'} eq 'all') {
2185: $max = $total_results ;
2186: } else {
2187: $max = $min + $ENV{'form.show'} - 1;
2188: $max = $total_results if ($max > $total_results);
2189: }
2190: ##
2191: ## Output links (if necessary) for 'prev' and 'next' pages.
2192: ##
2193: $r->print
2194: ('<center>'.
2195: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2196: "table=".$ENV{'form.table'}.
2197: "&phase=results".
2198: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2199: ."</center>\n"
2200: );
2201: if ($total_results == 0) {
2202: $r->print("There are currently no results.\n".
2203: "</form></body></html>");
2204: return;
2205: } else {
2206: $r->print
2207: ("<center>Results $min to $max out of $total_results</center>\n");
2208: }
2209: ##
2210: ## Get results from MySQL table
2211: ##
2212: my @Results = &Apache::lonmysql::get_rows($table,
2213: 'id>='.$min.' AND id<='.$max);
2214: ##
2215: ## Loop through the results and output them.
2216: ##
2217: foreach my $row (@Results) {
2218: if ($connection->aborted()) {
2219: untie %groupsearch_db if (tied(%groupsearch_db));
2220: &Apache::lonmysql::disconnect_from_db();
2221: return;
2222: }
2223: my %Fields = %{&parse_row(@$row)};
2224: my $output="<p>\n";
2225: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'});
2226: # Render the result into html
2227: $output.= &$viewfunction($prefix,%Fields);
2228: # Print them out as they come in.
2229: $r->print($output);
2230: $r->rflush();
2231: }
2232: if (@Results < 1) {
2233: $r->print("There were no results matching your query");
2234: } else {
2235: $r->print
2236: ('<center>'.
2237: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2238: "table=".$ENV{'form.table'}.
2239: "&phase=results".
2240: "&persistent_db_id=".
2241: $ENV{'form.persistent_db_id'})
2242: ."</center>\n"
2243: );
2244: }
2245: $r->print("</form></body></html>");
2246: $r->rflush();
2247: untie %groupsearch_db if (tied(%groupsearch_db));
2248: return;
2249: }
2250:
2251: ######################################################################
2252: ######################################################################
2253:
2254: =pod
2255:
2256: =item &catalogmode_output($title,$url)
2257:
2258: Returns html needed for the various catalog modes. Gets inputs from
2259: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db and $fnum
2260: (local variable).
2261:
2262: =cut
2263:
2264: ######################################################################
2265: ######################################################################
2266: {
2267: my $fnum = 0;
2268:
2269: sub catalogmode_output {
2270: my $output = '';
2271: my ($title,$url) = @_;
2272: if ($ENV{'form.catalogmode'} eq 'interactive') {
2273: $title=~ s/\'/\\\'/g;
2274: if ($ENV{'form.catalogmode'} eq 'interactive') {
2275: $output.=<<END
2276: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2277: onClick="javascript:select_data('$title','$url')">
2278: </font>
2279: END
2280: }
2281: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2282: $groupsearch_db{"pre_${fnum}_link"}=$url;
2283: $groupsearch_db{"pre_${fnum}_title"}=$title;
2284: $output.=<<END;
2285: <font size='-1'>
2286: <input type="checkbox" name="returnvalues" value="SELECT"
2287: onClick="javascript:queue($fnum)" />
2288: </font>
2289: END
2290: $fnum++;
2291: }
2292: return $output;
2293: }
2294:
2295: }
2296: ######################################################################
2297: ######################################################################
2298:
2299: =pod
2300:
2301: =item &parse_row
2302:
2303: Parse a row returned from the database.
2304:
2305: =cut
2306:
2307: ######################################################################
2308: ######################################################################
2309: sub parse_row {
2310: my @Row = @_;
2311: my %Fields;
2312: for (my $i=0;$i<=$#Row;$i++) {
2313: $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
2314: }
2315: $Fields{'language'} =
2316: &Apache::loncommon::languagedescription($Fields{'lang'});
2317: $Fields{'copyrighttag'} =
2318: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2319: $Fields{'mimetag'} =
2320: &Apache::loncommon::filedescription($Fields{'mime'});
2321: return \%Fields;
2322: }
2323:
2324: ###########################################################
2325: ###########################################################
2326:
2327: =pod
2328:
2329: =item &parse_raw_result()
2330:
2331: Takes a line from the file of results and parse it. Returns a hash
2332: with keys for the following fields:
2333: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
2334: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
2335: 'lastrevisiondate'.
2336:
2337: In addition, the following tags are set by calling the appropriate
2338: lonnet function: 'language', 'cprtag', 'mimetag'.
2339:
2340: The 'title' field is set to "Untitled" if the title field is blank.
2341:
2342: 'abstract' and 'keywords' are truncated to 200 characters.
2343:
2344: =cut
2345:
2346: ###########################################################
2347: ###########################################################
2348: sub parse_raw_result {
2349: my ($result,$hostname) = @_;
2350: # Check for a comma - if it is there then we do not need to unescape the
2351: # string. There seems to be some kind of problem with some items in
2352: # the database - the entire string gets sent out unescaped...?
2353: unless ($result =~ /,/) {
2354: $result = &Apache::lonnet::unescape($result);
2355: }
2356: my @fields=map {
2357: &Apache::lonnet::unescape($_);
2358: } (split(/\,/,$result));
2359: my ($title,$author,$subject,$url,$keywords,$version,
2360: $notes,$abstract,$mime,$lang,
2361: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
2362: my %Fields =
2363: ( title => &Apache::lonnet::unescape($title),
2364: author => &Apache::lonnet::unescape($author),
2365: subject => &Apache::lonnet::unescape($subject),
2366: url => &Apache::lonnet::unescape($url),
2367: keywords => &Apache::lonnet::unescape($keywords),
2368: version => &Apache::lonnet::unescape($version),
2369: notes => &Apache::lonnet::unescape($notes),
2370: abstract => &Apache::lonnet::unescape($abstract),
2371: mime => &Apache::lonnet::unescape($mime),
2372: lang => &Apache::lonnet::unescape($lang),
2373: owner => &Apache::lonnet::unescape($owner),
2374: copyright => &Apache::lonnet::unescape($copyright),
2375: creationdate => &Apache::lonnet::unescape($creationdate),
2376: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
2377: );
2378: $Fields{'language'} =
2379: &Apache::loncommon::languagedescription($Fields{'lang'});
2380: $Fields{'copyrighttag'} =
2381: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2382: $Fields{'mimetag'} =
2383: &Apache::loncommon::filedescription($Fields{'mime'});
2384: if ($Fields{'author'}=~/^(\s*|error)$/) {
2385: $Fields{'author'}="Unknown Author";
2386: }
2387: # Put spaces in the keyword list, if needed.
2388: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
2389: if ($Fields{'title'}=~ /^\s*$/ ) {
2390: $Fields{'title'}='Untitled';
2391: }
2392: unless ($ENV{'user.adv'}) {
2393: # What is this anyway?
2394: $Fields{'keywords'} = '- not displayed -';
2395: $Fields{'notes'} = '- not displayed -';
2396: $Fields{'abstract'} = '- not displayed -';
2397: $Fields{'subject'} = '- not displayed -';
2398: }
2399: if (length($Fields{'abstract'})>200) {
2400: $Fields{'abstract'} =
2401: substr($Fields{'abstract'},0,200).'...';
2402: }
2403: if (length($Fields{'keywords'})>200) {
2404: $Fields{'keywords'} =
2405: substr($Fields{'keywords'},0,200).'...';
2406: }
2407: return %Fields;
2408: }
2409:
2410: ###########################################################
2411: ###########################################################
2412:
2413: =pod
2414:
2415: =item &handle_custom_fields()
2416:
2417: =cut
2418:
2419: ###########################################################
2420: ###########################################################
2421: sub handle_custom_fields {
2422: my @results = @{shift()};
2423: my $customshow='';
2424: my $extrashow='';
2425: my @customfields;
2426: if ($ENV{'form.customshow'}) {
2427: $customshow=$ENV{'form.customshow'};
2428: $customshow=~s/[^\w\s]//g;
2429: my @fields=map {
2430: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2431: } split(/\s+/,$customshow);
2432: @customfields=split(/\s+/,$customshow);
2433: if ($customshow) {
2434: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2435: }
2436: }
2437: my $customdata='';
2438: my %customhash;
2439: foreach my $result (@results) {
2440: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2441: my $tmp=$result;
2442: $tmp=~s/^custom\=//;
2443: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2444: } split(/\,/,$tmp);
2445: $customhash{$k}=$v;
2446: }
2447: }
2448: return ($extrashow,\@customfields,\%customhash);
2449: }
2450:
2451: ######################################################################
2452: ######################################################################
2453:
2454: =pod
2455:
2456: =item &search_results_header
2457:
2458: Output the proper html headers and javascript code to deal with different
2459: calling modes.
2460:
2461: Takes most inputs directly from %ENV, except $mode.
2462:
2463: =over 4
2464:
2465: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2466:
2467: =back
2468:
2469: The following environment variables are checked:
2470:
2471: =over 4
2472:
2473: =item 'form.catalogmode'
2474:
2475: Checked for 'interactive' and 'groupsearch'.
2476:
2477: =item 'form.mode'
2478:
2479: Checked for existance & 'edit' mode.
2480:
2481: =item 'form.form'
2482:
2483: =item 'form.element'
2484:
2485: =back
2486:
2487: =cut
2488:
2489: ######################################################################
2490: ######################################################################
2491: sub search_results_header {
2492: my ($importbutton,$closebutton) = @_;
2493: my $result = '';
2494: # output beginning of search page
2495: # conditional output of script functions dependent on the mode in
2496: # which the search was invoked
2497: if ($ENV{'form.catalogmode'} eq 'interactive'){
2498: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2499: $result.=<<SCRIPT;
2500: <script type="text/javascript">
2501: function select_data(title,url) {
2502: changeTitle(title);
2503: changeURL(url);
2504: parent.close();
2505: }
2506: function changeTitle(val) {
2507: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2508: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2509: }
2510: }
2511: function changeURL(val) {
2512: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2513: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2514: }
2515: }
2516: </script>
2517: SCRIPT
2518: } elsif ($ENV{'form.mode'} eq 'edit') {
2519: my $form = $ENV{'form.form'};
2520: my $element = $ENV{'form.element'};
2521: $result.=<<SCRIPT;
2522: <script type="text/javascript">
2523: function select_data(title,url) {
2524: changeURL(url);
2525: parent.close();
2526: }
2527: function changeTitle(val) {
2528: }
2529: function changeURL(val) {
2530: if (parent.targetwin.document) {
2531: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2532: } else {
2533: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2534: alert("Unable to transfer data to "+url);
2535: }
2536: }
2537: </script>
2538: SCRIPT
2539: }
2540: }
2541: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2542: <script type="text/javascript">
2543: function queue(val) {
2544: if (document.forms.results.returnvalues[val].checked) {
2545: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2546: } else {
2547: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2548: }
2549: }
2550: function select_group() {
2551: parent.window.location=
2552: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2553: parent.statusframe.document.forms.statusform.elements.Queue.value;
2554: }
2555: </script>
2556: SCRIPT
2557: $result.=<<END;
2558: </head>
2559: $bodytag
2560: <form name="results" method="post" action="" >
2561: <input type="hidden" name="Queue" value="" />
2562: $importbutton
2563: END
2564: return $result;
2565: }
2566:
2567: ######################################################################
2568: ######################################################################
2569: sub search_status_header {
2570: return <<ENDSTATUS;
2571: <html><head><title>Search Status</title></head>
2572: $bodytag
2573: <h3>Search Status</h3>
2574: Sending search request to LON-CAPA servers.<br />
2575: ENDSTATUS
2576: }
2577:
2578: sub results_link {
2579: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2580: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2581: my $results_link = $basic_link."&phase=results".
2582: "&pause=1"."&start=1";
2583: return $results_link;
2584: }
2585:
2586: ######################################################################
2587: ######################################################################
2588: sub print_frames_interface {
2589: my $r = shift;
2590: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2591: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2592: my $run_search_link = $basic_link."&phase=run_search";
2593: my $results_link = &results_link();
2594: my $result = <<"ENDFRAMES";
2595: <html>
2596: <head>
2597: <script>
2598: var targetwin = opener;
2599: </script>
2600: <title>LON-CAPA Digital Library Search Results</title>
2601: </head>
2602: <frameset rows="150,*">
2603: <frame name="statusframe" src="$run_search_link">
2604: <frame name="resultsframe" src="$results_link">
2605: </frameset>
2606: </html>
2607: ENDFRAMES
2608:
2609: $r->print($result);
2610: return;
2611: }
2612:
2613: ######################################################################
2614: ######################################################################
2615:
2616: =pod
2617:
2618: =item Metadata Viewing Functions
2619:
2620: Output is a HTML-ified string.
2621: Input arguments are title, author, subject, url, keywords, version,
2622: notes, short abstract, mime, language, creation date,
2623: last revision date, owner, copyright, hostname, and
2624: extra custom metadata to show.
2625:
2626: =over 4
2627:
2628: =item &detailed_citation_view()
2629:
2630: =cut
2631:
2632: ######################################################################
2633: ######################################################################
2634: sub detailed_citation_view {
2635: my ($prefix,%values) = @_;
2636: my $result=<<END;
2637: <b>$prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2638: target='search_preview'>$values{'title'}</a></b>
2639: <p>
2640: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2641:
2642: <b>Subject: </b> $values{'subject'}<br />
2643: <b>Keyword(s): </b> $values{'keywords'}<br />
2644: <b>Notes: </b> $values{'notes'}<br />
2645: <b>MIME Type: </b> $values{'mimetag'}<br />
2646: <b>Language: </b> $values{'language'}<br />
2647: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
2648: </p>
2649: $values{'extrashow'}
2650: <p>
2651: $values{'shortabstract'}
2652: </p>
2653: <hr align='left' width='200' noshade />
2654: END
2655: return $result;
2656: }
2657:
2658: ######################################################################
2659: ######################################################################
2660:
2661: =pod
2662:
2663: =item &summary_view()
2664:
2665: =cut
2666: ######################################################################
2667: ######################################################################
2668: sub summary_view {
2669: my ($prefix,%values) = @_;
2670: my $result=<<END;
2671: $prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2672: target='search_preview'>$values{'author'}</a><br />
2673: $values{'title'}<br />
2674: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2675: $values{'copyrighttag'}<br />
2676: $values{'extrashow'}
2677: </p>
2678: <hr align='left' width='200' noshade />
2679: END
2680: return $result;
2681: }
2682:
2683: ######################################################################
2684: ######################################################################
2685:
2686: =pod
2687:
2688: =item &compact_view()
2689:
2690: =cut
2691:
2692: ######################################################################
2693: ######################################################################
2694: sub compact_view {
2695: my ($prefix,%values) = @_;
2696: my $result=<<END;
2697: $prefix <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2698: $values{'title'}</a>
2699: <b>$values{'author'}</b><br />
2700: END
2701: return $result;
2702: }
2703:
2704:
2705: ######################################################################
2706: ######################################################################
2707:
2708: =pod
2709:
2710: =item &fielded_format_view()
2711:
2712: =cut
2713:
2714: ######################################################################
2715: ######################################################################
2716: sub fielded_format_view {
2717: my ($prefix,%values) = @_;
2718: my $result=<<END;
2719: $prefix
2720: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2721: target='search_preview'>$values{'url'}</a>
2722: <br />
2723: <b>Title:</b> $values{'title'}<br />
2724: <b>Author(s):</b> $values{'author'}<br />
2725: <b>Subject:</b> $values{'subject'}<br />
2726: <b>Keyword(s):</b> $values{'keywords'}<br />
2727: <b>Notes:</b> $values{'notes'}<br />
2728: <b>MIME Type:</b> $values{'mimetag'}<br />
2729: <b>Language:</b> $values{'language'}<br />
2730: <b>Creation Date:</b> $values{'creationdate'}<br />
2731: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2732: <b>Publisher/Owner:</b> $values{'owner'}<br />
2733: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2734: <b>Repository Location:</b> $values{'hostname'}<br />
2735: <b>Abstract:</b> $values{'shortabstract'}<br />
2736: $values{'extrashow'}
2737: </p>
2738: <hr align='left' width='200' noshade />
2739: END
2740: return $result;
2741: }
2742:
2743: ######################################################################
2744: ######################################################################
2745:
2746: =pod
2747:
2748: =item &xml_sgml_view()
2749:
2750: =back
2751:
2752: =cut
2753:
2754: ######################################################################
2755: ######################################################################
2756: sub xml_sgml_view {
2757: my ($prefix,%values) = @_;
2758: my $result=<<END;
2759: $prefix
2760: <pre>
2761: <LonCapaResource>
2762: <url>$values{'url'}</url>
2763: <title>$values{'title'}</title>
2764: <author>$values{'author'}</author>
2765: <subject>$values{'subject'}</subject>
2766: <keywords>$values{'keywords'}</keywords>
2767: <notes>$values{'notes'}</notes>
2768: <mimeInfo>
2769: <mime>$values{'mime'}</mime>
2770: <mimetag>$values{'mimetag'}</mimetag>
2771: </mimeInfo>
2772: <languageInfo>
2773: <language>$values{'lang'}</language>
2774: <languagetag>$values{'language'}</languagetag>
2775: </languageInfo>
2776: <creationdate>$values{'creationdate'}</creationdate>
2777: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2778: <owner>$values{'owner'}</owner>
2779: <copyrightInfo>
2780: <copyright>$values{'copyright'}</copyright>
2781: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2782: </copyrightInfo>
2783: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2784: <shortabstract>$values{'shortabstract'}</shortabstract>
2785: </LonCapaResource>
2786: </pre>
2787: $values{'extrashow'}
2788: <hr align='left' width='200' noshade />
2789: END
2790: return $result;
2791: }
2792:
2793: ######################################################################
2794: ######################################################################
2795:
2796: =pod
2797:
2798: =item &filled() see if field is filled.
2799:
2800: =cut
2801:
2802: ######################################################################
2803: ######################################################################
2804: sub filled {
2805: my ($field)=@_;
2806: if ($field=~/\S/ && $field ne 'any') {
2807: return 1;
2808: }
2809: else {
2810: return 0;
2811: }
2812: }
2813:
2814: ######################################################################
2815: ######################################################################
2816:
2817: =pod
2818:
2819: =item &output_blank_field_error()
2820:
2821: Output a complete page that indicates the user has not filled in enough
2822: information to do a search.
2823:
2824: Inputs: $r (Apache request handle), $closebutton, $parms.
2825:
2826: Returns: nothing
2827:
2828: $parms is extra information to include in the 'Revise search request' link.
2829:
2830: =cut
2831:
2832: ######################################################################
2833: ######################################################################
2834: sub output_blank_field_error {
2835: my ($r,$closebutton,$parms)=@_;
2836: # make query information persistent to allow for subsequent revision
2837: $r->print(<<BEGINNING);
2838: <html>
2839: <head>
2840: <title>The LearningOnline Network with CAPA</title>
2841: BEGINNING
2842: $r->print(<<RESULTS);
2843: </head>
2844: $bodytag
2845: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2846: <h1>Search Catalog</h1>
2847: <form method="post" action="/adm/searchcat">
2848: $hidden_fields
2849: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2850: >Revise search request</a>
2851: $closebutton
2852: <hr />
2853: <h3>Unactionable search query.</h3>
2854: <p>
2855: You did not fill in enough information for the search to be started.
2856: You need to fill in relevant fields on the search page in order
2857: for a query to be processed.
2858: </p>
2859: </body>
2860: </html>
2861: RESULTS
2862: }
2863:
2864: ######################################################################
2865: ######################################################################
2866:
2867: =pod
2868:
2869: =item &output_date_error()
2870:
2871: Output a full html page with an error message.
2872:
2873: Inputs:
2874:
2875: $r, the request pointer.
2876: $message, the error message for the user.
2877: $closebutton, the specialized close button needed for groupsearch.
2878:
2879: =cut
2880:
2881: ######################################################################
2882: ######################################################################
2883: sub output_date_error {
2884: my ($r,$message,$closebutton)=@_;
2885: # make query information persistent to allow for subsequent revision
2886: $r->print(<<RESULTS);
2887: <html>
2888: <head>
2889: <title>The LearningOnline Network with CAPA</title>
2890: </head>
2891: $bodytag
2892: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2893: <h1>Search Catalog</h1>
2894: <form method="post" action="/adm/searchcat">
2895: $hidden_fields
2896: <input type='button' value='Revise search request'
2897: onClick='this.form.submit();' />
2898: $closebutton
2899: <hr />
2900: <h3>Error</h3>
2901: <p>
2902: $message
2903: </p>
2904: </body>
2905: </html>
2906: RESULTS
2907: }
2908:
2909: ######################################################################
2910: ######################################################################
2911:
2912: =pod
2913:
2914: =item &start_fresh_session()
2915:
2916: Cleans the global %groupsearch_db by removing all fields which begin with
2917: 'pre_' or 'store'.
2918:
2919: =cut
2920:
2921: ######################################################################
2922: ######################################################################
2923: sub start_fresh_session {
2924: delete $groupsearch_db{'mode_catalog'};
2925: foreach (keys %groupsearch_db) {
2926: if ($_ =~ /^pre_/) {
2927: delete $groupsearch_db{$_};
2928: }
2929: if ($_ =~ /^store/) {
2930: delete $groupsearch_db{$_};
2931: }
2932: }
2933: }
2934:
2935: 1;
2936:
2937: __END__
2938:
2939: =pod
2940:
2941: =back
2942:
2943: =cut
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