1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.155 2002/08/26 14:34:19 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a seperate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: ###############################################################################
63: ## ##
64: ## ORGANIZATION OF THIS PERL MODULE ##
65: ## ##
66: ## 1. Modules used by this module ##
67: ## 2. Variables used throughout the module ##
68: ## 3. handler subroutine called via Apache and mod_perl ##
69: ## 4. Other subroutines ##
70: ## ##
71: ###############################################################################
72:
73: package Apache::lonsearchcat;
74:
75: # ------------------------------------------------- modules used by this module
76: use strict;
77: use Apache::Constants qw(:common);
78: use Apache::lonnet();
79: use Apache::File();
80: use CGI qw(:standard);
81: use Text::Query;
82: use DBI;
83: use GDBM_File;
84: use Apache::loncommon();
85: use Apache::lonmysql();
86:
87: # ---------------------------------------- variables used throughout the module
88:
89: ######################################################################
90: ######################################################################
91:
92: =pod
93:
94: =item Global variables
95:
96: =over 4
97:
98: =item $importbutton
99:
100: button to take the select results and go to group sorting
101:
102: =item %groupsearch_db
103:
104: Database hash used to save values for the groupsearch RAT interface.
105:
106: =item $diropendb
107:
108: The full path to the (temporary) search database file. This is set and
109: used in &handler() and is also used in &output_results().
110:
111: =item %Views
112:
113: Hash which associates an output view description with the function
114: that produces it. Adding a new view type should be as easy as
115: adding a line to the definition of this hash and making sure the function
116: takes the proper parameters.
117:
118: =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: my $closebutton; # button that closes the search window
175: # This button is different for the RAT compared to
176: # normal invocation.
177: #
178: $r->content_type('text/html');
179: $r->send_http_header;
180: return OK if $r->header_only;
181: ##
182: ## Pick up form fields passed in the links.
183: ##
184: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
185: ['catalogmode','launch','acts','mode','form','element','pause',
186: 'phase','persistent_db_id','table','start','show']);
187: ##
188: ## The following is a trick - we wait a few seconds if asked to so
189: ## the daemon running the search can get ahead of the daemon
190: ## printing the results. We only need (theoretically) to do
191: ## this once, so the pause indicator is deleted
192: ##
193: if (exists($ENV{'form.pause'})) {
194: sleep(3);
195: delete($ENV{'form.pause'});
196: }
197: ##
198: ## Initialize global variables
199: ##
200: my $domain = $r->dir_config('lonDefDomain');
201: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
202: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
203: #
204: # set the name of the persistent database
205: # $ENV{'form.persistent_db_id'} can only have digits in it.
206: if (! exists($ENV{'form.persistent_db_id'}) ||
207: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
208: ($ENV{'form.launch'} eq '1')) {
209: $ENV{'form.persistent_db_id'} = time;
210: }
211: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
212: my $persistent_db_file = "/home/httpd/perl/tmp/".
213: &Apache::lonnet::escape($domain).
214: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
215: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
216: ##
217: if (! &get_persistent_form_data($persistent_db_file)) {
218: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
219: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
220: "from $persistent_db_file");
221: $r->print(<<END);
222: <html>
223: <head><title>LON-CAPA Search Error</title></head>
224: $bodytag
225: We were unable to retrieve data describing your search. This is a serious
226: error and has been logged. Please alert your LON-CAPA administrator.
227: </body>
228: </html>
229: END
230: return OK;
231: }
232: }
233: ##
234: ## Clear out old values from groupsearch database
235: ##
236: untie %groupsearch_db if (tied(%groupsearch_db));
237: if ($ENV{'form.launch'} eq '1' &&
238: ($ENV{'form.catalogmode'} eq 'groupsearch') &&
239: ($ENV{'form.phase'} eq 'results')) {
240: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
241: &start_fresh_session();
242: untie %groupsearch_db;
243: } else {
244: # This is a stupid error to give to the user.
245: # It really tells them nothing.
246: $r->print('<html><head></head>'.$bodytag.
247: 'Unable to tie hash to db file</body></html>');
248: return OK;
249: }
250: }
251: ##
252: ## Configure hidden fields
253: ##
254: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
255: $ENV{'form.persistent_db_id'}.'" />'."\n";
256: if (exists($ENV{'form.catalogmode'})) {
257: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
258: $ENV{'form.catalogmode'}.'" />'."\n";
259: }
260: if (exists($ENV{'form.form'})) {
261: $hidden_fields .= '<input type="hidden" name="form" value="'.
262: $ENV{'form.form'}.'" />'."\n";
263: }
264: if (exists($ENV{'form.element'})) {
265: $hidden_fields .= '<input type="hidden" name="element" value="'.
266: $ENV{'form.element'}.'" />'."\n";
267: }
268: if (exists($ENV{'form.mode'})) {
269: $hidden_fields .= '<input type="hidden" name="mode" value="'.
270: $ENV{'form.mode'}.'" />'."\n";
271: }
272: ##
273: ## Configure dynamic components of interface
274: ##
275: if ($ENV{'form.catalogmode'} eq 'interactive') {
276: $closebutton="<input type='button' name='close' value='CLOSE' ";
277: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
278: $closebutton .="onClick='parent.close()'";
279: } else {
280: $closebutton .="onClick='self.close()'";
281: }
282: $closebutton .=">\n";
283: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
284: $closebutton="<input type='button' name='close' value='CLOSE' ";
285: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
286: $closebutton .="onClick='parent.close()'";
287: } else {
288: $closebutton .="onClick='self.close()'";
289: }
290: $closebutton .= ">";
291: $importbutton=<<END;
292: <input type='button' name='import' value='IMPORT'
293: onClick='javascript:select_group()'>
294: END
295: } else {
296: $closebutton = '';
297: $importbutton = '';
298: }
299: ##
300: ## Sanity checks on form elements
301: ##
302: if (!defined($ENV{'form.viewselect'})) {
303: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
304: ($ENV{'form.catalogmode'} eq 'interactive')) {
305: $ENV{'form.viewselect'} ="Compact View";
306: } else {
307: $ENV{'form.viewselect'} ="Detailed Citation View";
308: }
309: }
310: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
311: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
312: ##
313: ## Switch on the phase
314: ##
315: if ($ENV{'form.phase'} eq 'disp_basic') {
316: &print_basic_search_form($r,$closebutton);
317: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
318: &print_advanced_search_form($r,$closebutton);
319: } elsif ($ENV{'form.phase'} eq 'results') {
320: &display_results($r,$importbutton,$closebutton);
321: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
322: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
323: &get_persistent_data($persistent_db_file,
324: ['query','customquery','customshow',
325: 'libraries','pretty_string']);
326: if ($ENV{'form.phase'} eq 'sort') {
327: &print_sort_form($r,$pretty_string);
328: } elsif ($ENV{'form.phase'} eq 'run_search') {
329: &run_search($r,$query,$customquery,$customshow,
330: $libraries,$pretty_string);
331: }
332: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
333: ($ENV{'form.phase'} eq 'adv_search')) {
334: $ENV{'form.searchmode'} = 'basic';
335: if ($ENV{'form.phase'} eq 'adv_search') {
336: $ENV{'form.searchmode'} = 'advanced';
337: }
338: # Set up table
339: if (! defined(&create_results_table())) {
340: $r->print(<<END);
341: <html><head><title>Search Error</title></head>
342: $bodytag
343: Unable to create table in which to store search results.
344: The search has been aborted.
345: </body>
346: </html>
347: END
348: return OK;
349: }
350: delete($ENV{'form.launch'});
351: if (! &make_form_data_persistent($r,$persistent_db_file)) {
352: $r->print(<<END);
353: <html><head><title>Search Error</title></head>
354: $bodytag
355: Unable to properly store search information. The search has been aborted.
356: </body>
357: </html>
358: END
359: return OK;
360: }
361: #
362: # We are running a search
363: my ($query,$customquery,$customshow,$libraries) =
364: (undef,undef,undef,undef);
365: my $pretty_string;
366: if ($ENV{'form.phase'} eq 'basic_search') {
367: ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
368: } else { # Advanced search
369: ($query,$customquery,$customshow,$libraries,$pretty_string)
370: = &parse_advanced_search($r,$closebutton);
371: return OK if (! defined($query));
372: }
373: &make_persistent({ query => $query,
374: customquery => $customquery,
375: customshow => $customshow,
376: libraries => $libraries,
377: pretty_string => $pretty_string },
378: $persistent_db_file);
379: ##
380: ## Print out the frames interface
381: ##
382: &print_frames_interface($r);
383: }
384: return OK;
385: }
386:
387: ######################################################################
388: ######################################################################
389:
390: =pod
391:
392: =item &print_basic_search_form()
393:
394: Returns a scalar which holds html for the basic search form.
395:
396: =cut
397:
398: ######################################################################
399: ######################################################################
400:
401: sub print_basic_search_form{
402: my ($r,$closebutton) = @_;
403: my $bodytag=&Apache::loncommon::bodytag('Catalog Search');
404: my $scrout=<<"ENDDOCUMENT";
405: <html>
406: <head>
407: <title>The LearningOnline Network with CAPA</title>
408: <script type="text/javascript">
409: function openhelp(val) {
410: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
411: 'scrollbars=1,width=600,height=300');
412: openhelpwin.focus();
413: }
414: </script>
415: </head>
416: $bodytag
417: <form method="post" action="/adm/searchcat">
418: <input type="hidden" name="phase" value="basic_search" />
419: $hidden_fields
420: <p>
421: Enter terms or phrases separated by AND, OR, or NOT
422: then press SEARCH below.
423: </p>
424: <p>
425: <table>
426: <tr><td>
427: ENDDOCUMENT
428: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
429: ' ';
430: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
431: $scrout.=<<END;
432: </td><td><a href="/adm/searchcat?phase=disp_adv">Advanced Search</a></td></tr>
433: <tr><td>$checkbox use related words</td><td></td></tr>
434: </table>
435: </p>
436: <p>
437: <input type="submit" name="basicsubmit" value='SEARCH' />
438: $closebutton
439: END
440: $scrout.=&selectbox(undef,'viewselect',
441: $ENV{'form.viewselect'},
442: undef,undef,undef,
443: sort(keys(%Views)));
444: $scrout.=&selectbox(undef,'show',
445: $ENV{'form.show'},
446: undef,undef,undef,
447: (10,20,50,100));
448: $scrout.=<<ENDDOCUMENT;
449: per page.
450: </p>
451: </form>
452: </body>
453: </html>
454: ENDDOCUMENT
455: $r->print($scrout);
456: return;
457: }
458: ######################################################################
459: ######################################################################
460:
461: =pod
462:
463: =item &advanced_search_form()
464:
465: Returns a scalar which holds html for the advanced search form.
466:
467: =cut
468:
469: ######################################################################
470: ######################################################################
471:
472: sub print_advanced_search_form{
473: my ($r,$closebutton) = @_;
474: my $advanced_buttons = <<"END";
475: <p>
476: <input type="submit" name="advancedsubmit" value='SEARCH' />
477: <input type="reset" name="reset" value='RESET' />
478: $closebutton
479: <input type="button" value="HELP" onClick="openhelp()" />
480: </p>
481: END
482: if (!defined($ENV{'form.viewselect'})) {
483: $ENV{'form.viewselect'} ="Detailed Citation View";
484: }
485: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
486: my $scrout=<<"ENDHEADER";
487: <html>
488: <head>
489: <title>The LearningOnline Network with CAPA</title>
490: <script type="text/javascript">
491: function openhelp(val) {
492: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
493: 'scrollbars=1,width=600,height=300');
494: openhelpwin.focus();
495: }
496: </script>
497: </head>
498: $bodytag
499: Enter terms or phrases separated by search operators
500: such as AND, OR, or NOT.<br />
501: <form method="post" action="/adm/searchcat">
502: $advanced_buttons
503: $hidden_fields
504: <input type="hidden" name="phase" value="adv_search" />
505: <table>
506: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
507: <td>
508: ENDHEADER
509: $scrout.=&selectbox(undef,'viewselect',
510: $ENV{'form.viewselect'},
511: undef,undef,undef,
512: sort(keys(%Views)));
513: $scrout.=' ';
514: $scrout.=&selectbox(undef,'show',
515: $ENV{'form.show'},
516: undef,undef,undef,
517: (10,20,50,100));
518: $scrout.=' '.
519: '<font color="#800000" face="helvetica">Per Page</font>';
520: $scrout.="</td><td>Related<br />Words</td></tr>\n";
521: $scrout.=&searchphrasefield_with_related('title', 'title' ,
522: $ENV{'form.title'});
523: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
524: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
525: $ENV{'form.subject'});
526: $scrout.=&searchphrasefield_with_related('keywords','keywords',
527: $ENV{'form.keywords'});
528: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
529: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
530: $ENV{'form.notes'});
531: $scrout.=&searchphrasefield_with_related('abstract','abstract',
532: $ENV{'form.abstract'});
533: # Hack - an empty table row.
534: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
535: $scrout.=&searchphrasefield('file<br />extension','mime',
536: $ENV{'form.mime'});
537: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
538: $scrout.=&searchphrasefield('publisher<br />owner','owner',
539: $ENV{'form.owner'});
540: $scrout.="</table>\n";
541: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
542: $scrout.=&selectbox('File Category','category',
543: $ENV{'form.category'},
544: 'any','Any category',
545: undef,
546: (&Apache::loncommon::filecategories()));
547: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
548: #----------------------------------------------------------------
549: # Allow restriction to multiple domains.
550: # I make the crazy assumption that there will never be a domain 'any'.
551: #
552: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
553: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
554: : ($ENV{'form.domains'}) );
555: my %domain_hash = ();
556: foreach (@allowed_domains) {
557: $domain_hash{$_}++;
558: }
559: my @domains =&Apache::loncommon::get_domains();
560: # adjust the size of the select box
561: my $size = 4;
562: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
563: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
564: 'DOMAINS</b></font><br />'.
565: '<select name="domains" size="'.$size.'" multiple>'."\n".
566: '<option name="any" value="any" '.
567: ($domain_hash{'any'}? 'selected ' :'').
568: '>all domains</option>'."\n";
569: foreach my $dom (sort @domains) {
570: $scrout.="<option name=\"$dom\" ".
571: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
572: }
573: $scrout.="</select>\n";
574: #----------------------------------------------------------------
575: $scrout.=&selectbox('Limit by language','language',
576: $ENV{'form.language'},'any','Any Language',
577: \&{Apache::loncommon::languagedescription},
578: (&Apache::loncommon::languageids),
579: );
580: # ------------------------------------------------ Compute date selection boxes
581: $scrout.=<<CREATIONDATESTART;
582: <p>
583: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
584: </font>
585: <br />
586: between:
587: CREATIONDATESTART
588: $scrout.=&dateboxes('creationdatestart',1,1,1976,
589: $ENV{'form.creationdatestart_month'},
590: $ENV{'form.creationdatestart_day'},
591: $ENV{'form.creationdatestart_year'},
592: );
593: $scrout.="and:\n";
594: $scrout.=&dateboxes('creationdateend',12,31,2051,
595: $ENV{'form.creationdateend_month'},
596: $ENV{'form.creationdateend_day'},
597: $ENV{'form.creationdateend_year'},
598: );
599: $scrout.="</p>";
600: $scrout.=<<LASTREVISIONDATESTART;
601: <p>
602: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
603: </b></font>
604: <br />between:
605: LASTREVISIONDATESTART
606: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
607: $ENV{'form.lastrevisiondatestart_month'},
608: $ENV{'form.lastrevisiondatestart_day'},
609: $ENV{'form.lastrevisiondatestart_year'},
610: );
611: $scrout.=<<LASTREVISIONDATEEND;
612: and:
613: LASTREVISIONDATEEND
614: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
615: $ENV{'form.lastrevisiondateend_month'},
616: $ENV{'form.lastrevisiondateend_day'},
617: $ENV{'form.lastrevisiondateend_year'},
618: );
619: $scrout.='</p>';
620: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
621: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
622: $ENV{'form.copyright'},
623: 'any','Any copyright/distribution',
624: \&{Apache::loncommon::copyrightdescription},
625: (&Apache::loncommon::copyrightids),
626: );
627: # ------------------------------------------- Compute customized metadata field
628: # $scrout.=<<CUSTOMMETADATA;
629: #<p>
630: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
631: #</font>
632: #For resource-specific metadata, enter in an expression in the form of
633: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
634: #<b>Example:</b> grandmother=75 OR grandfather=85
635: #<br />
636: #CUSTOMMETADATA
637: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
638: # $scrout.=<<CUSTOMSHOW;
639: #<p>
640: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
641: #</font>
642: #Enter in a space-separated list of special metadata fields to show
643: #in a fielded listing for each record result.
644: #<br />
645: #CUSTOMSHOW
646: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
647: $scrout.=<<ENDDOCUMENT;
648: $advanced_buttons
649: </form>
650: </body>
651: </html>
652: ENDDOCUMENT
653: $r->print($scrout);
654: return;
655: }
656:
657: ######################################################################
658: ######################################################################
659:
660: =pod
661:
662: =item &get_persistent_form_data
663:
664: Inputs: filename of database
665:
666: Outputs: returns undef on database errors.
667:
668: This function is the reverse of &make_persistent() for form data.
669: Retrieve persistent data from %persistent_db. Retrieved items will have their
670: values unescaped. If a form value already exists in $ENV, it will not be
671: overwritten. Form values that are array references may have values appended
672: to them.
673:
674: =cut
675:
676: ######################################################################
677: ######################################################################
678: sub get_persistent_form_data {
679: my $filename = shift;
680: return 0 if (! -e $filename);
681: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
682: &GDBM_READER(),0640));
683: #
684: # These make sure we do not get array references printed out as 'values'.
685: my %arrays_allowed = ('form.category'=>1,'form.domains'=>1);
686: #
687: # Loop through the keys, looking for 'form.'
688: foreach my $name (keys(%persistent_db)) {
689: next if ($name !~ /^form./);
690: next if (exists($ENV{$name}));
691: my @values = map {
692: &Apache::lonnet::unescape($_);
693: } split(',',$persistent_db{$name});
694: next if (@values <1);
695: if ($arrays_allowed{$name}) {
696: $ENV{$name} = [@values];
697: } else {
698: $ENV{$name} = $values[0] if ($values[0]);
699: }
700: }
701: untie (%persistent_db);
702: return 1;
703: }
704: ######################################################################
705: ######################################################################
706:
707: =pod
708:
709: =item &get_persistent_data
710:
711: Inputs: filename of database, ref to array of values to recover.
712:
713: Outputs: array of values. Returns undef on error.
714:
715: This function is the reverse of &make_persistent();
716: Retrieve persistent data from %persistent_db. Retrieved items will have their
717: values unescaped. If the item contains commas (before unescaping), the
718: returned value will be an array pointer.
719:
720: =cut
721:
722: ######################################################################
723: ######################################################################
724: sub get_persistent_data {
725: my $filename = shift;
726: my @Vars = @{shift()};
727: my @Values; # Return array
728: return undef if (! -e $filename);
729: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
730: &GDBM_READER(),0640));
731: foreach my $name (@Vars) {
732: if (! exists($persistent_db{$name})) {
733: push @Values, undef;
734: next;
735: }
736: my @values = map {
737: &Apache::lonnet::unescape($_);
738: } split(',',$persistent_db{$name});
739: if (@values <= 1) {
740: push @Values,$values[0];
741: } else {
742: push @Values,\@values;
743: }
744: }
745: untie (%persistent_db);
746: return @Values;
747: }
748:
749: ######################################################################
750: ######################################################################
751:
752: =pod
753:
754: =item &make_persistent()
755:
756: Inputs: Hash of values to save, filename of persistent database.
757:
758: Store variables away to the %persistent_db.
759: Values will be escaped. Values that are array pointers will have their
760: elements escaped and concatenated in a comma seperated string.
761:
762: =cut
763:
764: ######################################################################
765: ######################################################################
766: sub make_persistent {
767: my %save = %{shift()};
768: my $filename = shift;
769: return undef if (! tie(%persistent_db,'GDBM_File',
770: $filename,&GDBM_WRCREAT(),0640));
771: foreach my $name (keys(%save)) {
772: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
773: # We handle array references, but not recursively.
774: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
775: $persistent_db{$name} = $store;
776: }
777: untie(%persistent_db);
778: return 1;
779: }
780:
781: ######################################################################
782: ######################################################################
783:
784: =pod
785:
786: =item &make_form_data_persistent()
787:
788: Inputs: filename of persistent database.
789:
790: Store most form variables away to the %persistent_db.
791: Values will be escaped. Values that are array pointers will have their
792: elements escaped and concatenated in a comma seperated string.
793:
794: =cut
795:
796: ######################################################################
797: ######################################################################
798: sub make_form_data_persistent {
799: my $r = shift;
800: my $filename = shift;
801: my %save;
802: foreach (keys(%ENV)) {
803: next if (!/^form/ || /submit/);
804: $save{$_} = $ENV{$_};
805: }
806: return &make_persistent(\%save,$filename);
807: }
808:
809: ######################################################################
810: # HTML form building functions #
811: ######################################################################
812:
813: =pod
814:
815: =item HTML form building functions
816:
817: =over 4
818:
819: =cut
820:
821: ###############################################
822: ###############################################
823:
824: =pod
825:
826: =item &simpletextfield()
827:
828: Inputs: $name,$value,$size
829:
830: Returns a text input field with the given name, value, and size.
831: If size is not specified, a value of 20 is used.
832:
833: =cut
834:
835: ###############################################
836: ###############################################
837:
838: sub simpletextfield {
839: my ($name,$value,$size)=@_;
840: $size = 20 if (! defined($size));
841: return '<input type="text" name="'.$name.
842: '" size="'.$size.'" value="'.$value.'" />';
843: }
844:
845: ###############################################
846: ###############################################
847:
848: =pod
849:
850: =item &simplecheckbox()
851:
852: Inputs: $name,$value
853:
854: Returns a simple check box with the given $name.
855: If $value eq 'on' the box is checked.
856:
857: =cut
858:
859: ###############################################
860: ###############################################
861:
862: sub simplecheckbox {
863: my ($name,$value)=@_;
864: my $checked='';
865: $checked="checked" if $value eq 'on';
866: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
867: }
868:
869: ###############################################
870: ###############################################
871:
872: =pod
873:
874: =item &fieldtitle()
875:
876: Input: $title
877:
878: Returns a scalar with html which will display $title as a search
879: field heading.
880:
881: =cut
882:
883: ###############################################
884: ###############################################
885:
886: sub fieldtitle {
887: my $title = uc(shift());
888: return '<font color="#800000" face="helvetica"><b>'.$title.
889: ': </b></font>';
890: }
891:
892: ###############################################
893: ###############################################
894:
895: =pod
896:
897: =item &searchphrasefield()
898:
899: Inputs: $title,$name,$value
900:
901: Returns html for a title line and an input field for entering search terms.
902: The entry field (which is where the $name and $value are used) is a 50 column
903: simpletextfield. The html returned is for a row in a three column table.
904:
905: =cut
906:
907: ###############################################
908: ###############################################
909:
910: sub searchphrasefield {
911: my ($title,$name,$value)=@_;
912: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
913: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
914: }
915:
916: ###############################################
917: ###############################################
918:
919: =pod
920:
921: =item &searchphrasefield_with_related()
922:
923: Inputs: $title,$name,$value
924:
925: Returns html for a title line and an input field for entering search terms
926: and a check box for 'related words'. The entry field (which is where the
927: $name and $value are used) is a 50 column simpletextfield. The name of
928: the related words checkbox is "$name_related".
929:
930: =cut
931:
932: ###############################################
933: ###############################################
934:
935: sub searchphrasefield_with_related {
936: my ($title,$name,$value)=@_;
937: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
938: &simpletextfield($name,$value,50).'</td><td align="center"> '.
939: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
940: " </td></tr>\n";
941: }
942:
943: ###############################################
944: ###############################################
945:
946: =pod
947:
948: =item &dateboxes()
949:
950: Returns html selection form elements for the specification of
951: the day, month, and year.
952:
953: =cut
954:
955: ###############################################
956: ###############################################
957:
958: sub dateboxes {
959: my ($name,$defaultmonth,$defaultday,$defaultyear,
960: $currentmonth,$currentday,$currentyear)=@_;
961: ($defaultmonth,$defaultday,$defaultyear)=('','','');
962: #
963: # Day
964: my $day=<<END;
965: <select name="${name}_day">
966: <option value='$defaultday'> </option>
967: END
968: for (my $i = 1; $i<=31; $i++) {
969: $day.="<option value=\"$i\">$i</option>\n";
970: }
971: $day.="</select>\n";
972: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
973: #
974: # Month
975: my $month=<<END;
976: <select name="${name}_month">
977: <option value='$defaultmonth'> </option>
978: END
979: my $i = 1;
980: foreach (qw/January February March April May June
981: July August September October November December /){
982: $month .="<option value=\"$i\">$_</option>\n";
983: $i++;
984: }
985: $month.="</select>\n";
986: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
987: #
988: # Year (obviously)
989: my $year=<<END;
990: <select name="${name}_year">
991: <option value='$defaultyear'> </option>
992: END
993: my $maxyear = 2051;
994: for (my $i = 1976; $i<=$maxyear; $i++) {
995: $year.="<option value=\"$i\">$i</option>\n";
996: }
997: $year.="</select>\n";
998: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
999: return "$month$day$year";
1000: }
1001:
1002: ###############################################
1003: ###############################################
1004:
1005: =pod
1006:
1007: =item &selectbox()
1008:
1009: Returns a scalar containing an html <select> form.
1010:
1011: Inputs:
1012:
1013: =over 4
1014:
1015: =item $title
1016:
1017: Printed above the select box, in uppercase. If undefined, only a select
1018: box will be returned, with no additional html.
1019:
1020: =item $name
1021:
1022: The name element of the <select> tag.
1023:
1024: =item $default
1025:
1026: The default value of the form. Can be $anyvalue, or in @idlist.
1027:
1028: =item $anyvalue
1029:
1030: The <option value="..."> used to indicate a default of
1031: none of the values. Can be undef.
1032:
1033: =item $anytag
1034:
1035: The text associate with $anyvalue above.
1036:
1037: =item $functionref
1038:
1039: Each element in @idlist will be passed as a parameter
1040: to the function referenced here. The return value of the function should
1041: be a scalar description of the items. If this value is undefined the
1042: description of each item in @idlist will be the item name.
1043:
1044: =item @idlist
1045:
1046: The items to be selected from. One of these or $anyvalue will be the
1047: value returned by the form element, $ENV{form.$name}.
1048:
1049: =back
1050:
1051: =cut
1052:
1053: ###############################################
1054:
1055: sub selectbox {
1056: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
1057: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
1058: my $selout='';
1059: if (defined($title)) {
1060: my $uctitle=uc($title);
1061: $selout="\n".'<p><font color="#800000" face="helvetica">'.
1062: '<b>'.$uctitle.': </b></font>';
1063: }
1064: $selout .= '<select name="'.$name.'">';
1065: unshift @idlist,$anyvalue if (defined($anyvalue));
1066: foreach (@idlist) {
1067: $selout.='<option value="'.$_.'"';
1068: if ($_ eq $default and !/^any$/) {
1069: $selout.=' selected >'.&{$functionref}($_).'</option>';
1070: }
1071: elsif ($_ eq $default and /^$anyvalue$/) {
1072: $selout.=' selected >'.$anytag.'</option>';
1073: }
1074: else {$selout.='>'.&{$functionref}($_).'</option>';}
1075: }
1076: return $selout.'</select>'.(defined($title)?'</p>':' ');
1077: }
1078:
1079: ######################################################################
1080: # End of HTML form building functions #
1081: ######################################################################
1082:
1083: =pod
1084:
1085: =back
1086:
1087: =cut
1088:
1089:
1090: ######################################################################
1091: ######################################################################
1092:
1093: =pod
1094:
1095: =item &parse_advanced_search()
1096:
1097: Parse advanced search form and return the following:
1098:
1099: =over 4
1100:
1101: =item $query Scalar containing an SQL query.
1102:
1103: =item $customquery Scalar containing a custom query.
1104:
1105: =item $customshow Scalar containing commands to show custom metadata.
1106:
1107: =item $libraries_to_query Reference to array of domains to search.
1108:
1109: =back
1110:
1111: =cut
1112:
1113: ######################################################################
1114: ######################################################################
1115: sub parse_advanced_search {
1116: my ($r,$closebutton)=@_;
1117: my $fillflag=0;
1118: my $pretty_search_string = "<br />\n";
1119: # Clean up fields for safety
1120: for my $field ('title','author','subject','keywords','url','version',
1121: 'creationdatestart_month','creationdatestart_day',
1122: 'creationdatestart_year','creationdateend_month',
1123: 'creationdateend_day','creationdateend_year',
1124: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1125: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1126: 'lastrevisiondateend_day','lastrevisiondateend_year',
1127: 'notes','abstract','mime','language','owner',
1128: 'custommetadata','customshow','category') {
1129: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1130: }
1131: foreach ('mode','form','element') {
1132: # is this required? Hmmm.
1133: next unless (exists($ENV{"form.$_"}));
1134: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1135: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1136: }
1137: # Preprocess the category form element.
1138: $ENV{'form.category'} = 'any' if (ref($ENV{'form.category'}));
1139: if ($ENV{'form.category'} ne 'any') {
1140: my @extensions = &Apache::loncommon::filecategorytypes
1141: ($ENV{'form.category'});
1142: $ENV{'form.mime'} = join ' OR ',@extensions;
1143: }
1144: # Check to see if enough information was filled in
1145: for my $field ('title','author','subject','keywords','url','version',
1146: 'notes','abstract','mime','language','owner',
1147: 'custommetadata') {
1148: if (&filled($ENV{"form.$field"})) {
1149: $fillflag++;
1150: }
1151: }
1152: unless ($fillflag) {
1153: &output_blank_field_error($r,$closebutton,'phase=disp_adv');
1154: return ;
1155: }
1156: # Turn the form input into a SQL-based query
1157: my $query='';
1158: my @queries;
1159: my $font = '<font color="#800000" face="helvetica">';
1160: # Evaluate logical expression AND/OR/NOT phrase fields.
1161: foreach my $field ('title','author','subject','notes','abstract','url',
1162: 'keywords','version','owner','mime') {
1163: if ($ENV{'form.'.$field}) {
1164: my $searchphrase = $ENV{'form.'.$field};
1165: $pretty_search_string .= $font."$field</font> contains <b>".
1166: $searchphrase."</b>";
1167: if ($ENV{'form.'.$field.'_related'}) {
1168: my @New_Words;
1169: ($searchphrase,@New_Words) = &related_version($searchphrase);
1170: if (@New_Words) {
1171: $pretty_search_string .= " with related words: ".
1172: "<b>@New_Words</b>.";
1173: } else {
1174: $pretty_search_string .= " with no related words.";
1175: }
1176: }
1177: $pretty_search_string .= "<br />\n";
1178: push @queries,&build_SQL_query($field,$searchphrase);
1179: }
1180: }
1181: # I dislike the hack below.
1182: if ($ENV{'form.category'}) {
1183: $ENV{'form.mime'}='';
1184: }
1185: # Evaluate option lists
1186: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1187: push @queries,"(language like \"$ENV{'form.language'}\")";
1188: $pretty_search_string.=$font."language</font>= ".
1189: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1190: "<br />\n";
1191: }
1192: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1193: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1194: $pretty_search_string.=$font."copyright</font> = ".
1195: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1196: "<br \>\n";
1197: }
1198: #
1199: # Evaluate date windows
1200: my $datequery=&build_date_queries(
1201: $ENV{'form.creationdatestart_month'},
1202: $ENV{'form.creationdatestart_day'},
1203: $ENV{'form.creationdatestart_year'},
1204: $ENV{'form.creationdateend_month'},
1205: $ENV{'form.creationdateend_day'},
1206: $ENV{'form.creationdateend_year'},
1207: $ENV{'form.lastrevisiondatestart_month'},
1208: $ENV{'form.lastrevisiondatestart_day'},
1209: $ENV{'form.lastrevisiondatestart_year'},
1210: $ENV{'form.lastrevisiondateend_month'},
1211: $ENV{'form.lastrevisiondateend_day'},
1212: $ENV{'form.lastrevisiondateend_year'},
1213: );
1214: # Test to see if date windows are legitimate
1215: if ($datequery=~/^Incorrect/) {
1216: &output_date_error($r,$datequery,$closebutton);
1217: return ;
1218: } elsif ($datequery) {
1219: # Here is where you would set up pretty_search_string to output
1220: # date query information.
1221: push @queries,$datequery;
1222: }
1223: # Process form information for custom metadata querying
1224: my $customquery=undef;
1225: # if ($ENV{'form.custommetadata'}) {
1226: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1227: # $ENV{'form.custommetadata'}."</b><br />\n";
1228: # $customquery=&build_custommetadata_query('custommetadata',
1229: # $ENV{'form.custommetadata'});
1230: # }
1231: my $customshow=undef;
1232: # if ($ENV{'form.customshow'}) {
1233: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1234: # $ENV{'form.customshow'}."</b><br />\n";
1235: # $customshow=$ENV{'form.customshow'};
1236: # $customshow=~s/[^\w\s]//g;
1237: # my @fields=split(/\s+/,$customshow);
1238: # $customshow=join(" ",@fields);
1239: # }
1240: ## ---------------------------------------------------------------
1241: ## Deal with restrictions to given domains
1242: ##
1243: my $libraries_to_query = undef;
1244: # $ENV{'form.domains'} can be either a scalar or an array reference.
1245: # We need an array.
1246: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1247: : ($ENV{'form.domains'}) );
1248: my %domain_hash = ();
1249: my $pretty_domains_string;
1250: foreach (@allowed_domains) {
1251: $domain_hash{$_}++;
1252: }
1253: if ($domain_hash{'any'}) {
1254: $pretty_domains_string = "In all LON-CAPA domains.";
1255: } else {
1256: if (@allowed_domains > 1) {
1257: $pretty_domains_string = "In LON-CAPA domains:";
1258: } else {
1259: $pretty_domains_string = "In LON-CAPA domain ";
1260: }
1261: foreach (sort @allowed_domains) {
1262: $pretty_domains_string .= "<b>".$_."</b> ";
1263: }
1264: foreach (keys(%Apache::lonnet::libserv)) {
1265: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1266: push @$libraries_to_query,$_;
1267: }
1268: }
1269: }
1270: $pretty_search_string .= $pretty_domains_string."<br />\n";
1271: #
1272: if (@queries) {
1273: $query=join(" AND ",@queries);
1274: $query="select * from metadata where $query";
1275: } elsif ($customquery) {
1276: $query = '';
1277: }
1278: return ($query,$customquery,$customshow,$libraries_to_query,
1279: $pretty_search_string);
1280: }
1281:
1282: ######################################################################
1283: ######################################################################
1284:
1285: =pod
1286:
1287: =item &parse_basic_search()
1288:
1289: Parse the basic search form and return a scalar containing an sql query.
1290:
1291: =cut
1292:
1293: ######################################################################
1294: ######################################################################
1295: sub parse_basic_search {
1296: my ($r,$closebutton)=@_;
1297: # Clean up fields for safety
1298: for my $field ('basicexp') {
1299: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1300: }
1301: foreach ('mode','form','element') {
1302: # is this required? Hmmm.
1303: next unless (exists($ENV{"form.$_"}));
1304: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1305: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1306: }
1307:
1308: # Check to see if enough is filled in
1309: unless (&filled($ENV{'form.basicexp'})) {
1310: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1311: return OK;
1312: }
1313: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1314: my $search_string = $ENV{'form.basicexp'};
1315: if ($ENV{'form.related'}) {
1316: my @New_Words;
1317: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1318: if (@New_Words) {
1319: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1320: } else {
1321: $pretty_search_string .= " with no related words.";
1322: }
1323: }
1324: # Build SQL query string based on form page
1325: my $query='';
1326: my $concatarg=join('," ",',
1327: ('title', 'author', 'subject', 'notes', 'abstract',
1328: 'keywords'));
1329: $concatarg='title' if $ENV{'form.titleonly'};
1330: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1331: $pretty_search_string .= "<br />\n";
1332: return 'select * from metadata where '.$query,$pretty_search_string;
1333: }
1334:
1335:
1336: ######################################################################
1337: ######################################################################
1338:
1339: =pod
1340:
1341: =item &related_version
1342:
1343: Modifies an input string to include related words. Words in the string
1344: are replaced with parenthesized lists of 'OR'd words. For example
1345: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1346:
1347: Note: Using this twice on a string is probably silly.
1348:
1349: =cut
1350:
1351: ######################################################################
1352: ######################################################################
1353: sub related_version {
1354: my $search_string = shift;
1355: my $result = $search_string;
1356: my %New_Words = ();
1357: while ($search_string =~ /(\w+)/cg) {
1358: my $word = $1;
1359: next if (lc($word) =~ /\b(or|and|not)\b/);
1360: my @Words = &Apache::loncommon::get_related_words($word);
1361: @Words = ($#Words>4? @Words[0..4] : @Words);
1362: foreach (@Words) { $New_Words{$_}++;}
1363: my $replacement = join " OR ", ($word,@Words);
1364: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1365: }
1366: return $result,sort(keys(%New_Words));
1367: }
1368:
1369: ######################################################################
1370: ######################################################################
1371:
1372: =pod
1373:
1374: =item &build_SQL_query()
1375:
1376: Builds a SQL query string from a logical expression with AND/OR keywords
1377: using Text::Query and &recursive_SQL_query_builder()
1378:
1379: =cut
1380:
1381: ######################################################################
1382: ######################################################################
1383: sub build_SQL_query {
1384: my ($field_name,$logic_statement)=@_;
1385: my $q=new Text::Query('abc',
1386: -parse => 'Text::Query::ParseAdvanced',
1387: -build => 'Text::Query::Build');
1388: $q->prepare($logic_statement);
1389: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1390: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1391: return $sql_query;
1392: }
1393:
1394: ######################################################################
1395: ######################################################################
1396:
1397: =pod
1398:
1399: =item &build_custommetadata_query()
1400:
1401: Constructs a custom metadata query using a rather heinous regular
1402: expression.
1403:
1404: =cut
1405:
1406: ######################################################################
1407: ######################################################################
1408: sub build_custommetadata_query {
1409: my ($field_name,$logic_statement)=@_;
1410: my $q=new Text::Query('abc',
1411: -parse => 'Text::Query::ParseAdvanced',
1412: -build => 'Text::Query::BuildAdvancedString');
1413: $q->prepare($logic_statement);
1414: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1415: # quick fix to change literal into xml tag-matching
1416: # will eventually have to write a separate builder module
1417: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1418: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1419: /\\<$1\\>?# \<wordone\>
1420: \[\^\\<\]?# [^\<]
1421: \*$2\[\^\\<\]?# *wordtwo[^\<]
1422: \*\\<\\\/$1\\>?# *\<\/wordone\>
1423: /g;
1424: return $matchexp;
1425: }
1426:
1427: ######################################################################
1428: ######################################################################
1429:
1430: =pod
1431:
1432: =item &recursive_SQL_query_build()
1433:
1434: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1435:
1436: =cut
1437:
1438: ######################################################################
1439: ######################################################################
1440: sub recursive_SQL_query_build {
1441: my ($dkey,$pattern)=@_;
1442: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1443: return $pattern unless @matches;
1444: foreach my $match (@matches) {
1445: $match=~/\[ (\w+)\s(.*) \]/;
1446: my ($key,$value)=($1,$2);
1447: my $replacement='';
1448: if ($key eq 'literal') {
1449: $replacement="($dkey like \"\%$value\%\")";
1450: }
1451: elsif ($key eq 'not') {
1452: $value=~s/like/not like/;
1453: # $replacement="($dkey not like $value)";
1454: $replacement="$value";
1455: }
1456: elsif ($key eq 'and') {
1457: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1458: $replacement="($1 AND $2)";
1459: }
1460: elsif ($key eq 'or') {
1461: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1462: $replacement="($1 OR $2)";
1463: }
1464: substr($pattern,
1465: index($pattern,$match),
1466: length($match),
1467: $replacement
1468: );
1469: }
1470: &recursive_SQL_query_build($dkey,$pattern);
1471: }
1472:
1473: ######################################################################
1474: ######################################################################
1475:
1476: =pod
1477:
1478: =item &build_date_queries()
1479:
1480: Builds a SQL logic query to check time/date entries.
1481: Also reports errors (check for /^Incorrect/).
1482:
1483: =cut
1484:
1485: ######################################################################
1486: ######################################################################
1487: sub build_date_queries {
1488: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1489: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1490: my @queries;
1491: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1492: unless ($cmonth1 and $cday1 and $cyear1 and
1493: $cmonth2 and $cday2 and $cyear2) {
1494: return "Incorrect entry for the creation date. You must specify ".
1495: "a starting month, day, and year and an ending month, ".
1496: "day, and year.";
1497: }
1498: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1499: $cnumeric1+=0;
1500: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1501: $cnumeric2+=0;
1502: if ($cnumeric1>$cnumeric2) {
1503: return "Incorrect entry for the creation date. The starting ".
1504: "date must occur before the ending date.";
1505: }
1506: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1507: "$cyear2-$cmonth2-$cday2 23:59:59')";
1508: push @queries,$cquery;
1509: }
1510: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1511: unless ($lmonth1 and $lday1 and $lyear1 and
1512: $lmonth2 and $lday2 and $lyear2) {
1513: return "Incorrect entry for the last revision date. You must ".
1514: "specify a starting month, day, and year and an ending ".
1515: "month, day, and year.";
1516: }
1517: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1518: $lnumeric1+=0;
1519: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1520: $lnumeric2+=0;
1521: if ($lnumeric1>$lnumeric2) {
1522: return "Incorrect entry for the last revision date. The ".
1523: "starting date must occur before the ending date.";
1524: }
1525: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1526: "$lyear2-$lmonth2-$lday2 23:59:59')";
1527: push @queries,$lquery;
1528: }
1529: if (@queries) {
1530: return join(" AND ",@queries);
1531: }
1532: return '';
1533: }
1534:
1535: ######################################################################
1536: ######################################################################
1537:
1538: =pod
1539:
1540: =item ©right_check()
1541:
1542: =cut
1543:
1544: ######################################################################
1545: ######################################################################
1546: sub copyright_check {
1547: my $Metadata = shift;
1548: # Check copyright tags and skip results the user cannot use
1549: my (undef,undef,$resdom,$resname) = split('/',
1550: $Metadata->{'url'});
1551: # Check for priv
1552: if (($Metadata->{'copyright'} eq 'priv') &&
1553: (($ENV{'user.name'} ne $resname) &&
1554: ($ENV{'user.domain'} ne $resdom))) {
1555: return 0;
1556: }
1557: # Check for domain
1558: if (($Metadata->{'copyright'} eq 'domain') &&
1559: ($ENV{'user.domain'} ne $resdom)) {
1560: return 0;
1561: }
1562: return 1;
1563: }
1564:
1565:
1566: ######################################################################
1567: ######################################################################
1568:
1569: =pod
1570:
1571: =item &ensure_db_and_table
1572:
1573: Ensure we can get lonmysql to connect to the database and the table we
1574: need exists.
1575:
1576: Inputs: $r, table id
1577:
1578: Returns: undef on error, 1 if the table exists.
1579:
1580: =cut
1581:
1582: ######################################################################
1583: ######################################################################
1584: sub ensure_db_and_table {
1585: my ($r,$table) = @_;
1586: ##
1587: ## Sanity check the table id.
1588: ##
1589: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1590: $r->print("Unable to retrieve search results. ".
1591: "Unable to determine the table results were stored in. ".
1592: "</body></html>");
1593: return undef;
1594: }
1595: ##
1596: ## Make sure we can connect and the table exists.
1597: ##
1598: my $connection_result = &Apache::lonmysql::connect_to_db();
1599: if (!defined($connection_result)) {
1600: $r->print("Unable to connect to the MySQL database where your results".
1601: " are stored. </body></html>");
1602: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1603: " connect to database.");
1604: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1605: return undef;
1606: }
1607: my $table_check = &Apache::lonmysql::check_table($table);
1608: if (! defined($table_check)) {
1609: $r->print("A MySQL error has occurred.</form></body></html>");
1610: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1611: " of table ".$table);
1612: return undef;
1613: } elsif (! $table_check) {
1614: $r->print("The table of results could not be found.");
1615: &Apache::lonnet::logthis("The user requested a table, ".$table.
1616: ", that could not be found.");
1617: return undef;
1618: }
1619: return 1;
1620: }
1621:
1622: ######################################################################
1623: ######################################################################
1624:
1625: =pod
1626:
1627: =item &print_sort_form
1628:
1629: =cut
1630:
1631: ######################################################################
1632: ######################################################################
1633: sub print_sort_form {
1634: my ($r,$pretty_query_string) = @_;
1635: ##
1636: my %SortableFields =
1637: (id => 'Default',
1638: title => 'Title',
1639: author => 'Author',
1640: subject => 'Subject',
1641: url => 'URL',
1642: version => 'Version Number',
1643: mime => 'Mime type',
1644: lang => 'Language',
1645: owner => 'Owner/Publisher',
1646: copyright => 'Copyright',
1647: hostname => 'Host',
1648: creationdate => 'Creation Date',
1649: lastrevisiondate => 'Revision Date',
1650: );
1651: ##
1652: my $table = $ENV{'form.table'};
1653: return if (! &ensure_db_and_table($r,$table));
1654: ##
1655: ## Get the number of results
1656: ##
1657: my $total_results = &Apache::lonmysql::number_of_rows($table);
1658: if (! defined($total_results)) {
1659: $r->print("A MySQL error has occurred.</form></body></html>");
1660: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1661: " of rows in table ".$table);
1662: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1663: return;
1664: }
1665: my $result;
1666: $result.=<<END;
1667: <html>
1668: <head>
1669: <script>
1670: function change_sort() {
1671: var newloc = "/adm/searchcat?phase=results";
1672: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1673: newloc += "&sortby=";
1674: newloc += document.forms.statusform.elements.sortby.value;
1675: parent.resultsframe.location= newloc;
1676: }
1677: </script>
1678: <title>Results</title>
1679: </head>
1680: $bodytag
1681: <form name="statusform" action="" method="post">
1682: <input type="hidden" name="Queue" value="" />
1683: END
1684:
1685: #<h2>Sort Results</h2>
1686: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1687: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1688: # foreach (keys(%SortableFields)) {
1689: # $result.="<option name=\"$_\"";
1690: # if ($_ eq $ENV{'form.sortby'}) {
1691: # $result.=" selected ";
1692: # }
1693: # $result.=" >$SortableFields{$_}</option>\n";
1694: # }
1695: # $result.="</select>\n";
1696: my $revise = &revise_button();
1697: $result.=<<END;
1698: <p>
1699: There are $total_results matches to your query. $revise
1700: </p><p>
1701: Search:$pretty_query_string
1702: </p>
1703: </form>
1704: </body>
1705: </html>
1706: END
1707: $r->print($result);
1708: return;
1709: }
1710:
1711: #####################################################################
1712: #####################################################################
1713:
1714: =pod
1715:
1716: =item MySQL Table Description
1717:
1718: MySQL table creation requires a precise description of the data to be
1719: stored. The use of the correct types to hold data is vital to efficient
1720: storage and quick retrieval of records. The columns must be described in
1721: the following format:
1722:
1723: =cut
1724:
1725: ##
1726: ## Restrictions:
1727: ## columns of type 'text' and 'blob' cannot have defaults.
1728: ## columns of type 'enum' cannot be used for FULLTEXT.
1729: ##
1730: my @DataOrder = qw/id title author subject url keywords version notes
1731: abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
1732:
1733: my %Datatypes =
1734: ( id =>{ type => 'MEDIUMINT',
1735: restrictions => 'UNSIGNED NOT NULL',
1736: primary_key => 'yes',
1737: auto_inc => 'yes'
1738: },
1739: title =>{ type=>'TEXT'},
1740: author =>{ type=>'TEXT'},
1741: subject =>{ type=>'TEXT'},
1742: url =>{ type=>'TEXT',
1743: restrictions => 'NOT NULL' },
1744: keywords =>{ type=>'TEXT'},
1745: version =>{ type=>'TEXT'},
1746: notes =>{ type=>'TEXT'},
1747: abstract =>{ type=>'TEXT'},
1748: mime =>{ type=>'TEXT'},
1749: lang =>{ type=>'TEXT'},
1750: owner =>{ type=>'TEXT'},
1751: copyright =>{ type=>'TEXT'},
1752: hostname =>{ type=>'TEXT'},
1753: #--------------------------------------------------
1754: creationdate =>{ type=>'DATETIME'},
1755: lastrevisiondate =>{ type=>'DATETIME'},
1756: #--------------------------------------------------
1757: );
1758:
1759: my @Fullindicies =
1760: qw/title/;
1761: # qw/title author subject abstract mime language owner copyright/;
1762:
1763: ######################################################################
1764: ######################################################################
1765:
1766: =pod
1767:
1768: =item &create_results_table()
1769:
1770: Creates the table of search results by calling lonmysql. Stores the
1771: table id in $ENV{'form.table'}
1772:
1773: Inputs: none.
1774:
1775: Returns: the identifier of the table on success, undef on error.
1776:
1777: =cut
1778:
1779: ######################################################################
1780: ######################################################################
1781: sub create_results_table {
1782: my $table = &Apache::lonmysql::create_table
1783: ( { columns => \%Datatypes,
1784: column_order => \@DataOrder,
1785: fullindex => \@Fullindicies,
1786: } );
1787: if (defined($table)) {
1788: $ENV{'form.table'} = $table;
1789: return $table;
1790: }
1791: return undef; # Error...
1792: }
1793:
1794: ######################################################################
1795: ######################################################################
1796:
1797: =pod
1798:
1799: =item Search Status update functions
1800:
1801: Each of the following functions changes the values of one of the
1802: input fields used to display the search status to the user. The names
1803: should be explanatory.
1804:
1805: Inputs: Apache request handler ($r), text to display.
1806:
1807: Returns: Nothing.
1808:
1809: =over 4
1810:
1811: =item &update_count_status()
1812:
1813: =item &update_status()
1814:
1815: =item &update_seconds()
1816:
1817: =back
1818:
1819: =cut
1820:
1821: ######################################################################
1822: ######################################################################
1823: sub update_count_status {
1824: my ($r,$text) = @_;
1825: $text =~ s/\'/\\\'/g;
1826: $r->print
1827: ("<script>document.statusform.count.value = ' $text'</script>\n");
1828: $r->rflush();
1829: }
1830:
1831: sub update_status {
1832: my ($r,$text) = @_;
1833: $text =~ s/\'/\\\'/g;
1834: $r->print
1835: ("<script>document.statusform.status.value = ' $text'</script>\n");
1836: $r->rflush();
1837: }
1838:
1839: sub update_seconds {
1840: my ($r,$text) = @_;
1841: $text =~ s/\'/\\\'/g;
1842: $r->print
1843: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1844: $r->rflush();
1845: }
1846:
1847: ######################################################################
1848: ######################################################################
1849:
1850: =pod
1851:
1852: =item &revise_button
1853:
1854: Inputs: None
1855:
1856: Returns: html string for a 'revise search' button.
1857:
1858: =cut
1859:
1860: ######################################################################
1861: ######################################################################
1862: sub revise_button {
1863: my $revise_phase = 'disp_basic';
1864: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1865: my $newloc = '/adm/searchcat'.
1866: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1867: '&phase='.$revise_phase;
1868: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1869: qq{ onClick="parent.location='$newloc';" /> };
1870: return $result;
1871: }
1872:
1873: ######################################################################
1874: ######################################################################
1875:
1876: =pod
1877:
1878: =item &run_search
1879:
1880: =cut
1881:
1882: ######################################################################
1883: ######################################################################
1884: sub run_search {
1885: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1886: my $connection = $r->connection;
1887: #
1888: # Timing variables
1889: #
1890: my $starttime = time;
1891: my $max_time = 30; # seconds for the search to complete
1892: #
1893: # Print run_search header
1894: #
1895: $r->print(<<END);
1896: <html>
1897: <head><title>Search Status</title></head>
1898: $bodytag
1899: <form name="statusform" action="" method="post">
1900: <input type="hidden" name="Queue" value="" />
1901: END
1902: # Check to see if $pretty_string has more than one carriage return.
1903: # Assume \n s are following <br /> s and truncate the value.
1904: # (there is probably a better way)...
1905: my @Lines = split /<br \/>/,$pretty_string;
1906: if (@Lines > 2) {
1907: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1908: }
1909: $r->print("Search: ".$pretty_string);
1910: $r->rflush();
1911: #
1912: # Determine the servers we need to contact.
1913: #
1914: my @Servers_to_contact;
1915: if (defined($serverlist)) {
1916: if (ref($serverlist) eq 'ARRAY') {
1917: @Servers_to_contact = @$serverlist;
1918: } else {
1919: @Servers_to_contact = ($serverlist);
1920: }
1921: } else {
1922: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1923: }
1924: my %Server_status;
1925: my $table =$ENV{'form.table'};
1926: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1927: $r->print("Unable to determine table id to store search results in.".
1928: "The search has been aborted.</body></html>");
1929: return;
1930: }
1931: my $table_status = &Apache::lonmysql::check_table($table);
1932: if (! defined($table_status)) {
1933: $r->print("Unable to determine status of table.</body></html>");
1934: &Apache::lonnet::logthis("Bogus table id of $table for ".
1935: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1936: &Apache::lonnet::logthis("lonmysql error = ".
1937: &Apache::lonmysql::get_error());
1938: return;
1939: }
1940: if (! $table_status) {
1941: $r->print("The table id,$table, we tried to use is invalid.".
1942: "The search has been aborted.</body></html>");
1943: return;
1944: }
1945: ##
1946: ## Prepare for the big loop.
1947: ##
1948: my $hitcountsum;
1949: my $server;
1950: my $status;
1951: my $revise = &revise_button();
1952: $r->print(<<END);
1953: <table>
1954: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1955: <tr>
1956: <td><input type="text" name="status" value="" size="30" /></td>
1957: <td><input type="text" name="count" value="" size="10" /></td>
1958: <td><input type="text" name="seconds" value="" size="8" /></td>
1959: <td>$revise</td>
1960: </tr>
1961: </table>
1962: </form>
1963: END
1964: $r->rflush();
1965: my $time_remaining = $max_time - (time - $starttime) ;
1966: my $last_time = $time_remaining;
1967: &update_seconds($r,$time_remaining);
1968: while (($time_remaining > 0) &&
1969: ((@Servers_to_contact) || keys(%Server_status))) {
1970: # Send out a search request if it needs to be done.
1971: if (@Servers_to_contact) {
1972: # Contact one server
1973: my $server = shift(@Servers_to_contact);
1974: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1975: $customshow,[$server]);
1976: ($server) = keys(%$reply);
1977: $Server_status{$server} = $reply->{$server};
1978: &update_status($r,'contacting '.$server);
1979: } else {
1980: # wait a sec. to give time for files to be written
1981: # This sleep statement is here instead of outside the else
1982: # block because we do not want to pause if we have servers
1983: # left to contact.
1984: sleep(1);
1985: }
1986: &update_status($r,'waiting on '.(join(' ',keys(%Server_status))));
1987: while (my ($server,$status) = each(%Server_status)) {
1988: last if ($connection->aborted());
1989: if ($status eq 'con_lost') {
1990: delete ($Server_status{$server});
1991: next;
1992: }
1993: $status=~/^([\.\w]+)$/;
1994: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1995: if (-e $datafile && ! -e "$datafile.end") {
1996: &update_status($r,'Receiving results from '.$server);
1997: next;
1998: }
1999: last if ($connection->aborted());
2000: if (-e "$datafile.end") {
2001: &update_status($r,'Reading results from '.$server);
2002: if (-z "$datafile") {
2003: delete($Server_status{$server});
2004: next;
2005: }
2006: my $fh;
2007: if (!($fh=Apache::File->new($datafile))) {
2008: $r->print("Unable to open search results file for ".
2009: "server $server. Omitting from search");
2010: delete($Server_status{$server});
2011: next;
2012: }
2013: # Read in the whole file.
2014: while (my $result = <$fh>) {
2015: last if ($connection->aborted());
2016: # handle custom fields? Someday we will!
2017: chomp($result);
2018: next unless $result;
2019: # Parse the result.
2020: my %Fields = &parse_raw_result($result,$server);
2021: $Fields{'hostname'} = $server;
2022: next if (! ©right_check(\%Fields));
2023: # Store the result in the mysql database
2024: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2025: if (! defined($result)) {
2026: $r->print(&Apache::lonmysql::get_error());
2027: }
2028: # $r->print(&Apache::lonmysql::get_debug());
2029: $hitcountsum ++;
2030: $time_remaining = $max_time - (time - $starttime) ;
2031: if ($last_time - $time_remaining > 0) {
2032: &update_seconds($r,$time_remaining);
2033: $last_time = $time_remaining;
2034: }
2035: if ($hitcountsum % 50 == 0) {
2036: &update_count_status($r,$hitcountsum);
2037: }
2038: } # End of foreach (@results)
2039: $fh->close();
2040: # $server is only deleted if the results file has been
2041: # found and (successfully) opened. This may be a bad idea.
2042: delete($Server_status{$server});
2043: }
2044: last if ($connection->aborted());
2045: &update_count_status($r,$hitcountsum);
2046: }
2047: last if ($connection->aborted());
2048: # Finished looping through the servers
2049: $time_remaining = $max_time - (time - $starttime) ;
2050: if ($last_time - $time_remaining > 0) {
2051: $last_time = $time_remaining;
2052: &update_seconds($r,$time_remaining);
2053: }
2054: }
2055: &update_status($r,'Search Complete'.$server);
2056: &update_seconds($r,0);
2057: &Apache::lonmysql::disconnect_from_db();
2058: # We have run out of time or run out of servers to talk to and
2059: # results to get.
2060: $r->print("</body></html>");
2061: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2062: $r->print("<script>".
2063: "window.location='/adm/searchcat?".
2064: "phase=sort&".
2065: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2066: "</script>");
2067: }
2068: return;
2069: }
2070:
2071: ######################################################################
2072: ######################################################################
2073: =pod
2074:
2075: =item &prev_next_buttons
2076:
2077: =cut
2078:
2079: ######################################################################
2080: ######################################################################
2081: sub prev_next_buttons {
2082: my ($current_min,$show,$total,$parms) = @_;
2083: return '' if ($show eq 'all'); # No links if you get them all at once.
2084: my $links;
2085: ##
2086: ## Prev
2087: my $prev_min = $current_min - $show;
2088: $prev_min = 1 if $prev_min < 1;
2089: if ($prev_min < $current_min) {
2090: $links .= qq{
2091: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2092: };
2093: } else {
2094: $links .= 'prev';
2095: }
2096: ##
2097: ## Pages.... Someday.
2098: ##
2099: $links .= qq{
2100: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2101: };
2102: ##
2103: ## Next
2104: my $next_min = $current_min + $show;
2105: $next_min = $current_min if ($next_min > $total);
2106: if ($next_min != $current_min) {
2107: $links .= qq{
2108: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2109: };
2110: } else {
2111: $links .= ' next';
2112: }
2113: return $links;
2114: }
2115: ######################################################################
2116: ######################################################################
2117:
2118: =pod
2119:
2120: =item &display_results
2121:
2122: =cut
2123:
2124: ######################################################################
2125: ######################################################################
2126: sub display_results {
2127: my ($r,$importbutton,$closebutton) = @_;
2128: my $connection = $r->connection;
2129: $r->print(&search_results_header($importbutton,$closebutton));
2130: ##
2131: ## Set viewing function
2132: ##
2133: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2134: if (!defined($viewfunction)) {
2135: $r->print("Internal Error - Bad view selected.\n");
2136: $r->rflush();
2137: return;
2138: }
2139: ##
2140: ## Get the catalog controls setup
2141: ##
2142: my $action = "/adm/searchcat?phase=results";
2143: ##
2144: ## Deal with groupsearch
2145: ##
2146: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2147: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2148: &GDBM_WRCREAT(),0640)) {
2149: $r->print('Unable to store import results.</form></body></html>');
2150: $r->rflush();
2151: return;
2152: }
2153: }
2154: ##
2155: ## Prepare the table for querying
2156: ##
2157: my $table = $ENV{'form.table'};
2158: return if (! &ensure_db_and_table($r,$table));
2159: ##
2160: ## Get the number of results
2161: ##
2162: my $total_results = &Apache::lonmysql::number_of_rows($table);
2163: if (! defined($total_results)) {
2164: $r->print("A MySQL error has occurred.</form></body></html>");
2165: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2166: " of rows in table ".$table);
2167: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2168: return;
2169: }
2170: ##
2171: ## Determine how many results we need to get
2172: ##
2173: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2174: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2175: my $min = $ENV{'form.start'};
2176: my $max;
2177: if ($ENV{'form.show'} eq 'all') {
2178: $max = $total_results ;
2179: } else {
2180: $max = $min + $ENV{'form.show'} - 1;
2181: $max = $total_results if ($max > $total_results);
2182: }
2183: ##
2184: ## Output links (if necessary) for 'prev' and 'next' pages.
2185: ##
2186: $r->print
2187: ('<center>'.
2188: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2189: "table=".$ENV{'form.table'}.
2190: "&phase=results".
2191: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2192: ."</center>\n"
2193: );
2194: if ($total_results == 0) {
2195: $r->print("There are currently no results.\n".
2196: "</form></body></html>");
2197: return;
2198: } else {
2199: $r->print
2200: ("<center>Results $min to $max out of $total_results</center>\n");
2201: }
2202: ##
2203: ## Get results from MySQL table
2204: ##
2205: my @Results = &Apache::lonmysql::get_rows($table,
2206: 'id>='.$min.' AND id<='.$max);
2207: ##
2208: ## Loop through the results and output them.
2209: ##
2210: foreach my $row (@Results) {
2211: if ($connection->aborted()) {
2212: untie %groupsearch_db if (tied(%groupsearch_db));
2213: &Apache::lonmysql::disconnect_from_db();
2214: return;
2215: }
2216: my %Fields = %{&parse_row(@$row)};
2217: my $output="<p>\n";
2218: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'});
2219: # Render the result into html
2220: $output.= &$viewfunction($prefix,%Fields);
2221: # Print them out as they come in.
2222: $r->print($output);
2223: $r->rflush();
2224: }
2225: if (@Results < 1) {
2226: $r->print("There were no results matching your query");
2227: } else {
2228: $r->print
2229: ('<center>'.
2230: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2231: "table=".$ENV{'form.table'}.
2232: "&phase=results".
2233: "&persistent_db_id=".
2234: $ENV{'form.persistent_db_id'})
2235: ."</center>\n"
2236: );
2237: }
2238: $r->print("</form></body></html>");
2239: $r->rflush();
2240: untie %groupsearch_db if (tied(%groupsearch_db));
2241: return;
2242: }
2243:
2244: ######################################################################
2245: ######################################################################
2246:
2247: =pod
2248:
2249: =item &catalogmode_output($title,$url)
2250:
2251: Returns html needed for the various catalog modes. Gets inputs from
2252: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db and $fnum
2253: (local variable).
2254:
2255: =cut
2256:
2257: ######################################################################
2258: ######################################################################
2259: {
2260: my $fnum = 0;
2261:
2262: sub catalogmode_output {
2263: my $output = '';
2264: my ($title,$url) = @_;
2265: if ($ENV{'form.catalogmode'} eq 'interactive') {
2266: $title=~ s/\'/\\\'/g;
2267: if ($ENV{'form.catalogmode'} eq 'interactive') {
2268: $output.=<<END
2269: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2270: onClick="javascript:select_data('$title','$url')">
2271: </font>
2272: END
2273: }
2274: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2275: $groupsearch_db{"pre_${fnum}_link"}=$url;
2276: $groupsearch_db{"pre_${fnum}_title"}=$title;
2277: $output.=<<END;
2278: <font size='-1'>
2279: <input type="checkbox" name="returnvalues" value="SELECT"
2280: onClick="javascript:queue($fnum)" />
2281: </font>
2282: END
2283: $fnum++;
2284: }
2285: return $output;
2286: }
2287:
2288: }
2289: ######################################################################
2290: ######################################################################
2291:
2292: =pod
2293:
2294: =item &parse_row
2295:
2296: Parse a row returned from the database.
2297:
2298: =cut
2299:
2300: ######################################################################
2301: ######################################################################
2302: sub parse_row {
2303: my @Row = @_;
2304: my %Fields;
2305: for (my $i=0;$i<=$#Row;$i++) {
2306: $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
2307: }
2308: $Fields{'language'} =
2309: &Apache::loncommon::languagedescription($Fields{'lang'});
2310: $Fields{'copyrighttag'} =
2311: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2312: $Fields{'mimetag'} =
2313: &Apache::loncommon::filedescription($Fields{'mime'});
2314: return \%Fields;
2315: }
2316:
2317: ###########################################################
2318: ###########################################################
2319:
2320: =pod
2321:
2322: =item &parse_raw_result()
2323:
2324: Takes a line from the file of results and parse it. Returns a hash
2325: with keys for the following fields:
2326: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
2327: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
2328: 'lastrevisiondate'.
2329:
2330: In addition, the following tags are set by calling the appropriate
2331: lonnet function: 'language', 'cprtag', 'mimetag'.
2332:
2333: The 'title' field is set to "Untitled" if the title field is blank.
2334:
2335: 'abstract' and 'keywords' are truncated to 200 characters.
2336:
2337: =cut
2338:
2339: ###########################################################
2340: ###########################################################
2341: sub parse_raw_result {
2342: my ($result,$hostname) = @_;
2343: # Check for a comma - if it is there then we do not need to unescape the
2344: # string. There seems to be some kind of problem with some items in
2345: # the database - the entire string gets sent out unescaped...?
2346: unless ($result =~ /,/) {
2347: $result = &Apache::lonnet::unescape($result);
2348: }
2349: my @fields=map {
2350: &Apache::lonnet::unescape($_);
2351: } (split(/\,/,$result));
2352: my ($title,$author,$subject,$url,$keywords,$version,
2353: $notes,$abstract,$mime,$lang,
2354: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
2355: my %Fields =
2356: ( title => &Apache::lonnet::unescape($title),
2357: author => &Apache::lonnet::unescape($author),
2358: subject => &Apache::lonnet::unescape($subject),
2359: url => &Apache::lonnet::unescape($url),
2360: keywords => &Apache::lonnet::unescape($keywords),
2361: version => &Apache::lonnet::unescape($version),
2362: notes => &Apache::lonnet::unescape($notes),
2363: abstract => &Apache::lonnet::unescape($abstract),
2364: mime => &Apache::lonnet::unescape($mime),
2365: lang => &Apache::lonnet::unescape($lang),
2366: owner => &Apache::lonnet::unescape($owner),
2367: copyright => &Apache::lonnet::unescape($copyright),
2368: creationdate => &Apache::lonnet::unescape($creationdate),
2369: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
2370: );
2371: $Fields{'language'} =
2372: &Apache::loncommon::languagedescription($Fields{'lang'});
2373: $Fields{'copyrighttag'} =
2374: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2375: $Fields{'mimetag'} =
2376: &Apache::loncommon::filedescription($Fields{'mime'});
2377: if ($Fields{'author'}=~/^(\s*|error)$/) {
2378: $Fields{'author'}="Unknown Author";
2379: }
2380: # Put spaces in the keyword list, if needed.
2381: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
2382: if ($Fields{'title'}=~ /^\s*$/ ) {
2383: $Fields{'title'}='Untitled';
2384: }
2385: unless ($ENV{'user.adv'}) {
2386: # What is this anyway?
2387: $Fields{'keywords'} = '- not displayed -';
2388: $Fields{'notes'} = '- not displayed -';
2389: $Fields{'abstract'} = '- not displayed -';
2390: $Fields{'subject'} = '- not displayed -';
2391: }
2392: if (length($Fields{'abstract'})>200) {
2393: $Fields{'abstract'} =
2394: substr($Fields{'abstract'},0,200).'...';
2395: }
2396: if (length($Fields{'keywords'})>200) {
2397: $Fields{'keywords'} =
2398: substr($Fields{'keywords'},0,200).'...';
2399: }
2400: return %Fields;
2401: }
2402:
2403: ###########################################################
2404: ###########################################################
2405:
2406: =pod
2407:
2408: =item &handle_custom_fields()
2409:
2410: =cut
2411:
2412: ###########################################################
2413: ###########################################################
2414: sub handle_custom_fields {
2415: my @results = @{shift()};
2416: my $customshow='';
2417: my $extrashow='';
2418: my @customfields;
2419: if ($ENV{'form.customshow'}) {
2420: $customshow=$ENV{'form.customshow'};
2421: $customshow=~s/[^\w\s]//g;
2422: my @fields=map {
2423: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2424: } split(/\s+/,$customshow);
2425: @customfields=split(/\s+/,$customshow);
2426: if ($customshow) {
2427: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2428: }
2429: }
2430: my $customdata='';
2431: my %customhash;
2432: foreach my $result (@results) {
2433: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2434: my $tmp=$result;
2435: $tmp=~s/^custom\=//;
2436: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2437: } split(/\,/,$tmp);
2438: $customhash{$k}=$v;
2439: }
2440: }
2441: return ($extrashow,\@customfields,\%customhash);
2442: }
2443:
2444: ######################################################################
2445: ######################################################################
2446:
2447: =pod
2448:
2449: =item &search_results_header
2450:
2451: Output the proper html headers and javascript code to deal with different
2452: calling modes.
2453:
2454: Takes most inputs directly from %ENV, except $mode.
2455:
2456: =over 4
2457:
2458: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2459:
2460: =back
2461:
2462: The following environment variables are checked:
2463:
2464: =over 4
2465:
2466: =item 'form.catalogmode'
2467:
2468: Checked for 'interactive' and 'groupsearch'.
2469:
2470: =item 'form.mode'
2471:
2472: Checked for existance & 'edit' mode.
2473:
2474: =item 'form.form'
2475:
2476: =item 'form.element'
2477:
2478: =back
2479:
2480: =cut
2481:
2482: ######################################################################
2483: ######################################################################
2484: sub search_results_header {
2485: my ($importbutton,$closebutton) = @_;
2486: my $result = '';
2487: # output beginning of search page
2488: # conditional output of script functions dependent on the mode in
2489: # which the search was invoked
2490: if ($ENV{'form.catalogmode'} eq 'interactive'){
2491: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2492: $result.=<<SCRIPT;
2493: <script type="text/javascript">
2494: function select_data(title,url) {
2495: changeTitle(title);
2496: changeURL(url);
2497: parent.close();
2498: }
2499: function changeTitle(val) {
2500: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2501: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2502: }
2503: }
2504: function changeURL(val) {
2505: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2506: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2507: }
2508: }
2509: </script>
2510: SCRIPT
2511: } elsif ($ENV{'form.mode'} eq 'edit') {
2512: my $form = $ENV{'form.form'};
2513: my $element = $ENV{'form.element'};
2514: $result.=<<SCRIPT;
2515: <script type="text/javascript">
2516: function select_data(title,url) {
2517: changeURL(url);
2518: parent.close();
2519: }
2520: function changeTitle(val) {
2521: }
2522: function changeURL(val) {
2523: if (parent.targetwin.document) {
2524: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2525: } else {
2526: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2527: alert("Unable to transfer data to "+url);
2528: }
2529: }
2530: </script>
2531: SCRIPT
2532: }
2533: }
2534: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2535: <script type="text/javascript">
2536: function queue(val) {
2537: if (document.forms.results.returnvalues[val].checked) {
2538: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2539: } else {
2540: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2541: }
2542: }
2543: function select_group() {
2544: parent.window.location=
2545: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2546: parent.statusframe.document.forms.statusform.elements.Queue.value;
2547: }
2548: </script>
2549: SCRIPT
2550: $result.=<<END;
2551: </head>
2552: $bodytag
2553: <form name="results" method="post" action="" >
2554: <input type="hidden" name="Queue" value="" />
2555: $importbutton
2556: END
2557: return $result;
2558: }
2559:
2560: ######################################################################
2561: ######################################################################
2562: sub search_status_header {
2563: return <<ENDSTATUS;
2564: <html><head><title>Search Status</title></head>
2565: $bodytag
2566: <h3>Search Status</h3>
2567: Sending search request to LON-CAPA servers.<br />
2568: ENDSTATUS
2569: }
2570:
2571: sub results_link {
2572: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2573: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2574: my $results_link = $basic_link."&phase=results".
2575: "&pause=1"."&start=1";
2576: return $results_link;
2577: }
2578:
2579: ######################################################################
2580: ######################################################################
2581: sub print_frames_interface {
2582: my $r = shift;
2583: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2584: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2585: my $run_search_link = $basic_link."&phase=run_search";
2586: my $results_link = &results_link();
2587: my $result = <<"ENDFRAMES";
2588: <html>
2589: <head>
2590: <script>
2591: var targetwin = opener;
2592: </script>
2593: <title>LON-CAPA Digital Library Search Results</title>
2594: </head>
2595: <frameset rows="150,*">
2596: <frame name="statusframe" src="$run_search_link">
2597: <frame name="resultsframe" src="$results_link">
2598: </frameset>
2599: </html>
2600: ENDFRAMES
2601:
2602: $r->print($result);
2603: return;
2604: }
2605:
2606: ######################################################################
2607: ######################################################################
2608:
2609: =pod
2610:
2611: =item Metadata Viewing Functions
2612:
2613: Output is a HTML-ified string.
2614: Input arguments are title, author, subject, url, keywords, version,
2615: notes, short abstract, mime, language, creation date,
2616: last revision date, owner, copyright, hostname, and
2617: extra custom metadata to show.
2618:
2619: =over 4
2620:
2621: =item &detailed_citation_view()
2622:
2623: =cut
2624:
2625: ######################################################################
2626: ######################################################################
2627: sub detailed_citation_view {
2628: my ($prefix,%values) = @_;
2629: my $result=<<END;
2630: <b>$prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2631: target='search_preview'>$values{'title'}</a></b>
2632: <p>
2633: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2634:
2635: <b>Subject: </b> $values{'subject'}<br />
2636: <b>Keyword(s): </b> $values{'keywords'}<br />
2637: <b>Notes: </b> $values{'notes'}<br />
2638: <b>MIME Type: </b> $values{'mimetag'}<br />
2639: <b>Language: </b> $values{'language'}<br />
2640: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
2641: </p>
2642: $values{'extrashow'}
2643: <p>
2644: $values{'shortabstract'}
2645: </p>
2646: <hr align='left' width='200' noshade />
2647: END
2648: return $result;
2649: }
2650:
2651: ######################################################################
2652: ######################################################################
2653:
2654: =pod
2655:
2656: =item &summary_view()
2657:
2658: =cut
2659: ######################################################################
2660: ######################################################################
2661: sub summary_view {
2662: my ($prefix,%values) = @_;
2663: my $result=<<END;
2664: $prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2665: target='search_preview'>$values{'author'}</a><br />
2666: $values{'title'}<br />
2667: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2668: $values{'copyrighttag'}<br />
2669: $values{'extrashow'}
2670: </p>
2671: <hr align='left' width='200' noshade />
2672: END
2673: return $result;
2674: }
2675:
2676: ######################################################################
2677: ######################################################################
2678:
2679: =pod
2680:
2681: =item &compact_view()
2682:
2683: =cut
2684:
2685: ######################################################################
2686: ######################################################################
2687: sub compact_view {
2688: my ($prefix,%values) = @_;
2689: my $result=<<END;
2690: $prefix <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2691: $values{'title'}</a>
2692: <b>$values{'author'}</b><br />
2693: END
2694: return $result;
2695: }
2696:
2697:
2698: ######################################################################
2699: ######################################################################
2700:
2701: =pod
2702:
2703: =item &fielded_format_view()
2704:
2705: =cut
2706:
2707: ######################################################################
2708: ######################################################################
2709: sub fielded_format_view {
2710: my ($prefix,%values) = @_;
2711: my $result=<<END;
2712: $prefix
2713: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2714: target='search_preview'>$values{'url'}</a>
2715: <br />
2716: <b>Title:</b> $values{'title'}<br />
2717: <b>Author(s):</b> $values{'author'}<br />
2718: <b>Subject:</b> $values{'subject'}<br />
2719: <b>Keyword(s):</b> $values{'keywords'}<br />
2720: <b>Notes:</b> $values{'notes'}<br />
2721: <b>MIME Type:</b> $values{'mimetag'}<br />
2722: <b>Language:</b> $values{'language'}<br />
2723: <b>Creation Date:</b> $values{'creationdate'}<br />
2724: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2725: <b>Publisher/Owner:</b> $values{'owner'}<br />
2726: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2727: <b>Repository Location:</b> $values{'hostname'}<br />
2728: <b>Abstract:</b> $values{'shortabstract'}<br />
2729: $values{'extrashow'}
2730: </p>
2731: <hr align='left' width='200' noshade />
2732: END
2733: return $result;
2734: }
2735:
2736: ######################################################################
2737: ######################################################################
2738:
2739: =pod
2740:
2741: =item &xml_sgml_view()
2742:
2743: =back
2744:
2745: =cut
2746:
2747: ######################################################################
2748: ######################################################################
2749: sub xml_sgml_view {
2750: my ($prefix,%values) = @_;
2751: my $result=<<END;
2752: $prefix
2753: <pre>
2754: <LonCapaResource>
2755: <url>$values{'url'}</url>
2756: <title>$values{'title'}</title>
2757: <author>$values{'author'}</author>
2758: <subject>$values{'subject'}</subject>
2759: <keywords>$values{'keywords'}</keywords>
2760: <notes>$values{'notes'}</notes>
2761: <mimeInfo>
2762: <mime>$values{'mime'}</mime>
2763: <mimetag>$values{'mimetag'}</mimetag>
2764: </mimeInfo>
2765: <languageInfo>
2766: <language>$values{'lang'}</language>
2767: <languagetag>$values{'language'}</languagetag>
2768: </languageInfo>
2769: <creationdate>$values{'creationdate'}</creationdate>
2770: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2771: <owner>$values{'owner'}</owner>
2772: <copyrightInfo>
2773: <copyright>$values{'copyright'}</copyright>
2774: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2775: </copyrightInfo>
2776: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2777: <shortabstract>$values{'shortabstract'}</shortabstract>
2778: </LonCapaResource>
2779: </pre>
2780: $values{'extrashow'}
2781: <hr align='left' width='200' noshade />
2782: END
2783: return $result;
2784: }
2785:
2786: ######################################################################
2787: ######################################################################
2788:
2789: =pod
2790:
2791: =item &filled() see if field is filled.
2792:
2793: =cut
2794:
2795: ######################################################################
2796: ######################################################################
2797: sub filled {
2798: my ($field)=@_;
2799: if ($field=~/\S/ && $field ne 'any') {
2800: return 1;
2801: }
2802: else {
2803: return 0;
2804: }
2805: }
2806:
2807: ######################################################################
2808: ######################################################################
2809:
2810: =pod
2811:
2812: =item &output_blank_field_error()
2813:
2814: Output a complete page that indicates the user has not filled in enough
2815: information to do a search.
2816:
2817: Inputs: $r (Apache request handle), $closebutton, $parms.
2818:
2819: Returns: nothing
2820:
2821: $parms is extra information to include in the 'Revise search request' link.
2822:
2823: =cut
2824:
2825: ######################################################################
2826: ######################################################################
2827: sub output_blank_field_error {
2828: my ($r,$closebutton,$parms)=@_;
2829: # make query information persistent to allow for subsequent revision
2830: $r->print(<<BEGINNING);
2831: <html>
2832: <head>
2833: <title>The LearningOnline Network with CAPA</title>
2834: BEGINNING
2835: $r->print(<<RESULTS);
2836: </head>
2837: $bodytag
2838: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2839: <h1>Search Catalog</h1>
2840: <form method="post" action="/adm/searchcat">
2841: $hidden_fields
2842: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2843: >Revise search request</a>
2844: $closebutton
2845: <hr />
2846: <h3>Unactionable search query.</h3>
2847: <p>
2848: You did not fill in enough information for the search to be started.
2849: You need to fill in relevant fields on the search page in order
2850: for a query to be processed.
2851: </p>
2852: </body>
2853: </html>
2854: RESULTS
2855: }
2856:
2857: ######################################################################
2858: ######################################################################
2859:
2860: =pod
2861:
2862: =item &output_date_error()
2863:
2864: Output a full html page with an error message.
2865:
2866: Inputs:
2867:
2868: $r, the request pointer.
2869: $message, the error message for the user.
2870: $closebutton, the specialized close button needed for groupsearch.
2871:
2872: =cut
2873:
2874: ######################################################################
2875: ######################################################################
2876: sub output_date_error {
2877: my ($r,$message,$closebutton)=@_;
2878: # make query information persistent to allow for subsequent revision
2879: $r->print(<<RESULTS);
2880: <html>
2881: <head>
2882: <title>The LearningOnline Network with CAPA</title>
2883: </head>
2884: $bodytag
2885: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2886: <h1>Search Catalog</h1>
2887: <form method="post" action="/adm/searchcat">
2888: $hidden_fields
2889: <input type='button' value='Revise search request'
2890: onClick='this.form.submit();' />
2891: $closebutton
2892: <hr />
2893: <h3>Error</h3>
2894: <p>
2895: $message
2896: </p>
2897: </body>
2898: </html>
2899: RESULTS
2900: }
2901:
2902: ######################################################################
2903: ######################################################################
2904:
2905: =pod
2906:
2907: =item &start_fresh_session()
2908:
2909: Cleans the global %groupsearch_db by removing all fields which begin with
2910: 'pre_' or 'store'.
2911:
2912: =cut
2913:
2914: ######################################################################
2915: ######################################################################
2916: sub start_fresh_session {
2917: delete $groupsearch_db{'mode_catalog'};
2918: foreach (keys %groupsearch_db) {
2919: if ($_ =~ /^pre_/) {
2920: delete $groupsearch_db{$_};
2921: }
2922: if ($_ =~ /^store/) {
2923: delete $groupsearch_db{$_};
2924: }
2925: }
2926: }
2927:
2928: 1;
2929:
2930: __END__
2931:
2932: =pod
2933:
2934: =back
2935:
2936: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonsearchcat.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface