1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.160 2002/11/03 19:03:29 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###############################################################################
29: ###############################################################################
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsearchcat - LONCAPA Search Interface
36:
37: =head1 SYNOPSIS
38:
39: Search interface to LON-CAPAs digital library
40:
41: =head1 DESCRIPTION
42:
43: This module enables searching for a distributed browseable catalog.
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48: lonsearchcat presents the user with an interface to search the LON-CAPA
49: digital library. lonsearchcat also initiates the execution of a search
50: by sending the search parameters to LON-CAPA servers. The progress of
51: search (on a server basis) is displayed to the user in a seperate window.
52:
53: =head1 Internals
54:
55: =over 4
56:
57: =cut
58:
59: ###############################################################################
60: ###############################################################################
61:
62: ###############################################################################
63: ## ##
64: ## ORGANIZATION OF THIS PERL MODULE ##
65: ## ##
66: ## 1. Modules used by this module ##
67: ## 2. Variables used throughout the module ##
68: ## 3. handler subroutine called via Apache and mod_perl ##
69: ## 4. Other subroutines ##
70: ## ##
71: ###############################################################################
72:
73: package Apache::lonsearchcat;
74:
75: # ------------------------------------------------- modules used by this module
76: use strict;
77: use Apache::Constants qw(:common);
78: use Apache::lonnet();
79: use Apache::File();
80: use CGI qw(:standard);
81: use Text::Query;
82: use DBI;
83: use GDBM_File;
84: use Apache::loncommon();
85: use Apache::lonmysql();
86:
87: # ---------------------------------------- variables used throughout the module
88:
89: ######################################################################
90: ######################################################################
91:
92: =pod
93:
94: =item Global variables
95:
96: =over 4
97:
98: =item $importbutton
99:
100: button to take the select results and go to group sorting
101:
102: =item %groupsearch_db
103:
104: Database hash used to save values for the groupsearch RAT interface.
105:
106: =item $diropendb
107:
108: The full path to the (temporary) search database file. This is set and
109: used in &handler() and is also used in &output_results().
110:
111: =item %Views
112:
113: Hash which associates an output view description with the function
114: that produces it. Adding a new view type should be as easy as
115: adding a line to the definition of this hash and making sure the function
116: takes the proper parameters.
117:
118: =item $bodytag
119:
120: LON-CAPA standard body tag, gotten from &Apache::lonnet::bodytag.
121: No title, no table, just a <body> tag.
122:
123: =back
124:
125: =cut
126:
127: ######################################################################
128: ######################################################################
129:
130: # -- dynamically rendered interface components
131: my $importbutton; # button to take the selected results and go to group sorting
132:
133: # -- miscellaneous variables
134: my %groupsearch_db; # database hash
135: my $diropendb = ""; # db file
136: # View Description Function Pointer
137: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
138: "Summary View" => \&summary_view,
139: "Fielded Format" => \&fielded_format_view,
140: "XML/SGML" => \&xml_sgml_view,
141: "Compact View" => \&compact_view);
142: my %persistent_db;
143: my $hidden_fields;
144: my $bodytag;
145:
146: ######################################################################
147: ######################################################################
148:
149: =pod
150:
151: =item &handler() - main handler invoked by httpd child
152:
153: =item Variables
154:
155: =over 4
156:
157: =item $hidden
158:
159: holds 'hidden' html forms
160:
161: =item $scrout
162:
163: string that holds portions of the screen output
164:
165: =back
166:
167: =cut
168:
169: ######################################################################
170: ######################################################################
171: sub handler {
172: my $r = shift;
173: #
174:
175: my $loaderror=&Apache::lonnet::overloaderror($r);
176: if ($loaderror) { return $loaderror; }
177:
178: my $closebutton; # button that closes the search window
179: # This button is different for the RAT compared to
180: # normal invocation.
181: #
182: $r->content_type('text/html');
183: $r->send_http_header;
184: return OK if $r->header_only;
185: ##
186: ## Prevent caching of the search interface window. Hopefully this means
187: ## we will get the launch=1 passed in a little more.
188: &Apache::loncommon::no_cache($r);
189: ##
190: ## Pick up form fields passed in the links.
191: ##
192: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
193: ['catalogmode','launch','acts','mode','form','element','pause',
194: 'phase','persistent_db_id','table','start','show',
195: 'cleargroupsort']);
196: ##
197: ## The following is a trick - we wait a few seconds if asked to so
198: ## the daemon running the search can get ahead of the daemon
199: ## printing the results. We only need (theoretically) to do
200: ## this once, so the pause indicator is deleted
201: ##
202: if (exists($ENV{'form.pause'})) {
203: sleep(3);
204: delete($ENV{'form.pause'});
205: }
206: ##
207: ## Initialize global variables
208: ##
209: my $domain = $r->dir_config('lonDefDomain');
210: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
211: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
212: #
213: # set the name of the persistent database
214: # $ENV{'form.persistent_db_id'} can only have digits in it.
215: if (! exists($ENV{'form.persistent_db_id'}) ||
216: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
217: ($ENV{'form.launch'} eq '1')) {
218: $ENV{'form.persistent_db_id'} = time;
219: }
220: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
221: my $persistent_db_file = "/home/httpd/perl/tmp/".
222: &Apache::lonnet::escape($domain).
223: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
224: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
225: ##
226: if (! &get_persistent_form_data($persistent_db_file)) {
227: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
228: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
229: "from $persistent_db_file");
230: $r->print(<<END);
231: <html>
232: <head><title>LON-CAPA Search Error</title></head>
233: $bodytag
234: We were unable to retrieve data describing your search. This is a serious
235: error and has been logged. Please alert your LON-CAPA administrator.
236: </body>
237: </html>
238: END
239: return OK;
240: }
241: }
242: ##
243: ## Clear out old values from groupsearch database
244: ##
245: untie %groupsearch_db if (tied(%groupsearch_db));
246: if (($ENV{'form.cleargroupsort'} eq '1') ||
247: (($ENV{'form.launch'} eq '1') &&
248: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
249: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
250: &start_fresh_session();
251: untie %groupsearch_db;
252: delete($ENV{'form.cleargroupsort'});
253: } else {
254: # This is a stupid error to give to the user.
255: # It really tells them nothing.
256: $r->print('<html><head></head>'.$bodytag.
257: 'Unable to tie hash to db file</body></html>');
258: return OK;
259: }
260: }
261: ##
262: ## Configure hidden fields
263: ##
264: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
265: $ENV{'form.persistent_db_id'}.'" />'."\n";
266: if (exists($ENV{'form.catalogmode'})) {
267: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
268: $ENV{'form.catalogmode'}.'" />'."\n";
269: }
270: if (exists($ENV{'form.form'})) {
271: $hidden_fields .= '<input type="hidden" name="form" value="'.
272: $ENV{'form.form'}.'" />'."\n";
273: }
274: if (exists($ENV{'form.element'})) {
275: $hidden_fields .= '<input type="hidden" name="element" value="'.
276: $ENV{'form.element'}.'" />'."\n";
277: }
278: if (exists($ENV{'form.mode'})) {
279: $hidden_fields .= '<input type="hidden" name="mode" value="'.
280: $ENV{'form.mode'}.'" />'."\n";
281: }
282: ##
283: ## Configure dynamic components of interface
284: ##
285: if ($ENV{'form.catalogmode'} eq 'interactive') {
286: $closebutton="<input type='button' name='close' value='CLOSE' ";
287: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
288: $closebutton .="onClick='parent.close()'";
289: } else {
290: $closebutton .="onClick='self.close()'";
291: }
292: $closebutton .=">\n";
293: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
294: $closebutton="<input type='button' name='close' value='CLOSE' ";
295: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
296: $closebutton .="onClick='parent.close()'";
297: } else {
298: $closebutton .="onClick='self.close()'";
299: }
300: $closebutton .= ">";
301: $importbutton=<<END;
302: <input type='button' name='import' value='IMPORT'
303: onClick='javascript:select_group()'>
304: END
305: } else {
306: $closebutton = '';
307: $importbutton = '';
308: }
309: ##
310: ## Sanity checks on form elements
311: ##
312: if (!defined($ENV{'form.viewselect'})) {
313: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
314: ($ENV{'form.catalogmode'} eq 'interactive')) {
315: $ENV{'form.viewselect'} ="Compact View";
316: } else {
317: $ENV{'form.viewselect'} ="Detailed Citation View";
318: }
319: }
320: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
321: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
322: ##
323: ## Switch on the phase
324: ##
325: if ($ENV{'form.phase'} eq 'disp_basic') {
326: &print_basic_search_form($r,$closebutton);
327: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
328: &print_advanced_search_form($r,$closebutton);
329: } elsif ($ENV{'form.phase'} eq 'results') {
330: &display_results($r,$importbutton,$closebutton);
331: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
332: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
333: &get_persistent_data($persistent_db_file,
334: ['query','customquery','customshow',
335: 'libraries','pretty_string']);
336: if ($ENV{'form.phase'} eq 'sort') {
337: &print_sort_form($r,$pretty_string);
338: } elsif ($ENV{'form.phase'} eq 'run_search') {
339: &run_search($r,$query,$customquery,$customshow,
340: $libraries,$pretty_string);
341: }
342: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
343: ($ENV{'form.phase'} eq 'adv_search')) {
344: $ENV{'form.searchmode'} = 'basic';
345: if ($ENV{'form.phase'} eq 'adv_search') {
346: $ENV{'form.searchmode'} = 'advanced';
347: }
348: # Set up table
349: if (! defined(&create_results_table())) {
350: $r->print(<<END);
351: <html><head><title>Search Error</title></head>
352: $bodytag
353: Unable to create table in which to store search results.
354: The search has been aborted.
355: </body>
356: </html>
357: END
358: return OK;
359: }
360: delete($ENV{'form.launch'});
361: if (! &make_form_data_persistent($r,$persistent_db_file)) {
362: $r->print(<<END);
363: <html><head><title>Search Error</title></head>
364: $bodytag
365: Unable to properly store search information. The search has been aborted.
366: </body>
367: </html>
368: END
369: return OK;
370: }
371: #
372: # We are running a search
373: my ($query,$customquery,$customshow,$libraries) =
374: (undef,undef,undef,undef);
375: my $pretty_string;
376: if ($ENV{'form.phase'} eq 'basic_search') {
377: ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
378: } else { # Advanced search
379: ($query,$customquery,$customshow,$libraries,$pretty_string)
380: = &parse_advanced_search($r,$closebutton);
381: return OK if (! defined($query));
382: }
383: &make_persistent({ query => $query,
384: customquery => $customquery,
385: customshow => $customshow,
386: libraries => $libraries,
387: pretty_string => $pretty_string },
388: $persistent_db_file);
389: ##
390: ## Print out the frames interface
391: ##
392: &print_frames_interface($r);
393: }
394: return OK;
395: }
396:
397: ######################################################################
398: ######################################################################
399:
400: =pod
401:
402: =item &print_basic_search_form()
403:
404: Returns a scalar which holds html for the basic search form.
405:
406: =cut
407:
408: ######################################################################
409: ######################################################################
410:
411: sub print_basic_search_form{
412: my ($r,$closebutton) = @_;
413: my $bodytag=&Apache::loncommon::bodytag('Catalog Search');
414: my $scrout=<<"ENDDOCUMENT";
415: <html>
416: <head>
417: <title>The LearningOnline Network with CAPA</title>
418: <script type="text/javascript">
419: function openhelp(val) {
420: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
421: 'scrollbars=1,width=600,height=300');
422: openhelpwin.focus();
423: }
424: </script>
425: </head>
426: $bodytag
427: <form method="post" action="/adm/searchcat">
428: <input type="hidden" name="phase" value="basic_search" />
429: $hidden_fields
430: <p>
431: Enter terms or phrases separated by AND, OR, or NOT
432: then press SEARCH below.
433: </p>
434: <p>
435: <table>
436: <tr><td>
437: ENDDOCUMENT
438: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
439: ' ';
440: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
441: $scrout.=<<END;
442: </td><td><a
443: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}"
444: >Advanced Search</a></td></tr>
445: <tr><td>$checkbox use related words</td><td></td></tr>
446: </table>
447: </p>
448: <p>
449: <input type="submit" name="basicsubmit" value='SEARCH' />
450: $closebutton
451: END
452: $scrout.=&selectbox(undef,'viewselect',
453: $ENV{'form.viewselect'},
454: undef,undef,undef,
455: sort(keys(%Views)));
456: $scrout.=&selectbox(undef,'show',
457: $ENV{'form.show'},
458: undef,undef,undef,
459: (10,20,50,100));
460: $scrout.=<<ENDDOCUMENT;
461: per page.
462: </p>
463: </form>
464: </body>
465: </html>
466: ENDDOCUMENT
467: $r->print($scrout);
468: return;
469: }
470: ######################################################################
471: ######################################################################
472:
473: =pod
474:
475: =item &advanced_search_form()
476:
477: Returns a scalar which holds html for the advanced search form.
478:
479: =cut
480:
481: ######################################################################
482: ######################################################################
483:
484: sub print_advanced_search_form{
485: my ($r,$closebutton) = @_;
486: my $advanced_buttons = <<"END";
487: <p>
488: <input type="submit" name="advancedsubmit" value='SEARCH' />
489: <input type="reset" name="reset" value='RESET' />
490: $closebutton
491: <input type="button" value="HELP" onClick="openhelp()" />
492: </p>
493: END
494: if (!defined($ENV{'form.viewselect'})) {
495: $ENV{'form.viewselect'} ="Detailed Citation View";
496: }
497: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
498: my $scrout=<<"ENDHEADER";
499: <html>
500: <head>
501: <title>The LearningOnline Network with CAPA</title>
502: <script type="text/javascript">
503: function openhelp(val) {
504: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
505: 'scrollbars=1,width=600,height=300');
506: openhelpwin.focus();
507: }
508: </script>
509: </head>
510: $bodytag
511: Enter terms or phrases separated by search operators
512: such as AND, OR, or NOT.<br />
513: <form method="post" action="/adm/searchcat">
514: $advanced_buttons
515: $hidden_fields
516: <input type="hidden" name="phase" value="adv_search" />
517: <table>
518: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
519: <td>
520: ENDHEADER
521: $scrout.=&selectbox(undef,'viewselect',
522: $ENV{'form.viewselect'},
523: undef,undef,undef,
524: sort(keys(%Views)));
525: $scrout.=' ';
526: $scrout.=&selectbox(undef,'show',
527: $ENV{'form.show'},
528: undef,undef,undef,
529: (10,20,50,100));
530: $scrout.=' '.
531: '<font color="#800000" face="helvetica">Per Page</font>';
532: $scrout.="</td><td>Related<br />Words</td></tr>\n";
533: $scrout.=&searchphrasefield_with_related('title', 'title' ,
534: $ENV{'form.title'});
535: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
536: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
537: $ENV{'form.subject'});
538: $scrout.=&searchphrasefield_with_related('keywords','keywords',
539: $ENV{'form.keywords'});
540: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
541: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
542: $ENV{'form.notes'});
543: $scrout.=&searchphrasefield_with_related('abstract','abstract',
544: $ENV{'form.abstract'});
545: # Hack - an empty table row.
546: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
547: $scrout.=&searchphrasefield('file<br />extension','mime',
548: $ENV{'form.mime'});
549: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
550: $scrout.=&searchphrasefield('publisher<br />owner','owner',
551: $ENV{'form.owner'});
552: $scrout.="</table>\n";
553: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
554: $scrout.=&selectbox('File Category','category',
555: $ENV{'form.category'},
556: 'any','Any category',
557: undef,
558: (&Apache::loncommon::filecategories()));
559: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
560: #----------------------------------------------------------------
561: # Allow restriction to multiple domains.
562: # I make the crazy assumption that there will never be a domain 'any'.
563: #
564: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
565: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
566: : ($ENV{'form.domains'}) );
567: my %domain_hash = ();
568: foreach (@allowed_domains) {
569: $domain_hash{$_}++;
570: }
571: my @domains =&Apache::loncommon::get_domains();
572: # adjust the size of the select box
573: my $size = 4;
574: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
575: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
576: 'DOMAINS</b></font><br />'.
577: '<select name="domains" size="'.$size.'" multiple>'."\n".
578: '<option name="any" value="any" '.
579: ($domain_hash{'any'}? 'selected ' :'').
580: '>all domains</option>'."\n";
581: foreach my $dom (sort @domains) {
582: $scrout.="<option name=\"$dom\" ".
583: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
584: }
585: $scrout.="</select>\n";
586: #----------------------------------------------------------------
587: $scrout.=&selectbox('Limit by language','language',
588: $ENV{'form.language'},'any','Any Language',
589: \&{Apache::loncommon::languagedescription},
590: (&Apache::loncommon::languageids),
591: );
592: # ------------------------------------------------ Compute date selection boxes
593: $scrout.=<<CREATIONDATESTART;
594: <p>
595: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
596: </font>
597: <br />
598: between:
599: CREATIONDATESTART
600: $scrout.=&dateboxes('creationdatestart',1,1,1976,
601: $ENV{'form.creationdatestart_month'},
602: $ENV{'form.creationdatestart_day'},
603: $ENV{'form.creationdatestart_year'},
604: );
605: $scrout.="and:\n";
606: $scrout.=&dateboxes('creationdateend',12,31,2051,
607: $ENV{'form.creationdateend_month'},
608: $ENV{'form.creationdateend_day'},
609: $ENV{'form.creationdateend_year'},
610: );
611: $scrout.="</p>";
612: $scrout.=<<LASTREVISIONDATESTART;
613: <p>
614: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
615: </b></font>
616: <br />between:
617: LASTREVISIONDATESTART
618: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
619: $ENV{'form.lastrevisiondatestart_month'},
620: $ENV{'form.lastrevisiondatestart_day'},
621: $ENV{'form.lastrevisiondatestart_year'},
622: );
623: $scrout.=<<LASTREVISIONDATEEND;
624: and:
625: LASTREVISIONDATEEND
626: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
627: $ENV{'form.lastrevisiondateend_month'},
628: $ENV{'form.lastrevisiondateend_day'},
629: $ENV{'form.lastrevisiondateend_year'},
630: );
631: $scrout.='</p>';
632: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
633: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
634: $ENV{'form.copyright'},
635: 'any','Any copyright/distribution',
636: \&{Apache::loncommon::copyrightdescription},
637: (&Apache::loncommon::copyrightids),
638: );
639: # ------------------------------------------- Compute customized metadata field
640: # $scrout.=<<CUSTOMMETADATA;
641: #<p>
642: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
643: #</font>
644: #For resource-specific metadata, enter in an expression in the form of
645: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
646: #<b>Example:</b> grandmother=75 OR grandfather=85
647: #<br />
648: #CUSTOMMETADATA
649: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
650: # $scrout.=<<CUSTOMSHOW;
651: #<p>
652: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
653: #</font>
654: #Enter in a space-separated list of special metadata fields to show
655: #in a fielded listing for each record result.
656: #<br />
657: #CUSTOMSHOW
658: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
659: $scrout.=<<ENDDOCUMENT;
660: $advanced_buttons
661: </form>
662: </body>
663: </html>
664: ENDDOCUMENT
665: $r->print($scrout);
666: return;
667: }
668:
669: ######################################################################
670: ######################################################################
671:
672: =pod
673:
674: =item &get_persistent_form_data
675:
676: Inputs: filename of database
677:
678: Outputs: returns undef on database errors.
679:
680: This function is the reverse of &make_persistent() for form data.
681: Retrieve persistent data from %persistent_db. Retrieved items will have their
682: values unescaped. If a form value already exists in $ENV, it will not be
683: overwritten. Form values that are array references may have values appended
684: to them.
685:
686: =cut
687:
688: ######################################################################
689: ######################################################################
690: sub get_persistent_form_data {
691: my $filename = shift;
692: return 0 if (! -e $filename);
693: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
694: &GDBM_READER(),0640));
695: #
696: # These make sure we do not get array references printed out as 'values'.
697: my %arrays_allowed = ('form.category'=>1,'form.domains'=>1);
698: #
699: # Loop through the keys, looking for 'form.'
700: foreach my $name (keys(%persistent_db)) {
701: next if ($name !~ /^form./);
702: next if (exists($ENV{$name}));
703: my @values = map {
704: &Apache::lonnet::unescape($_);
705: } split(',',$persistent_db{$name});
706: next if (@values <1);
707: if ($arrays_allowed{$name}) {
708: $ENV{$name} = [@values];
709: } else {
710: $ENV{$name} = $values[0] if ($values[0]);
711: }
712: }
713: untie (%persistent_db);
714: return 1;
715: }
716: ######################################################################
717: ######################################################################
718:
719: =pod
720:
721: =item &get_persistent_data
722:
723: Inputs: filename of database, ref to array of values to recover.
724:
725: Outputs: array of values. Returns undef on error.
726:
727: This function is the reverse of &make_persistent();
728: Retrieve persistent data from %persistent_db. Retrieved items will have their
729: values unescaped. If the item contains commas (before unescaping), the
730: returned value will be an array pointer.
731:
732: =cut
733:
734: ######################################################################
735: ######################################################################
736: sub get_persistent_data {
737: my $filename = shift;
738: my @Vars = @{shift()};
739: my @Values; # Return array
740: return undef if (! -e $filename);
741: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
742: &GDBM_READER(),0640));
743: foreach my $name (@Vars) {
744: if (! exists($persistent_db{$name})) {
745: push @Values, undef;
746: next;
747: }
748: my @values = map {
749: &Apache::lonnet::unescape($_);
750: } split(',',$persistent_db{$name});
751: if (@values <= 1) {
752: push @Values,$values[0];
753: } else {
754: push @Values,\@values;
755: }
756: }
757: untie (%persistent_db);
758: return @Values;
759: }
760:
761: ######################################################################
762: ######################################################################
763:
764: =pod
765:
766: =item &make_persistent()
767:
768: Inputs: Hash of values to save, filename of persistent database.
769:
770: Store variables away to the %persistent_db.
771: Values will be escaped. Values that are array pointers will have their
772: elements escaped and concatenated in a comma seperated string.
773:
774: =cut
775:
776: ######################################################################
777: ######################################################################
778: sub make_persistent {
779: my %save = %{shift()};
780: my $filename = shift;
781: return undef if (! tie(%persistent_db,'GDBM_File',
782: $filename,&GDBM_WRCREAT(),0640));
783: foreach my $name (keys(%save)) {
784: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
785: # We handle array references, but not recursively.
786: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
787: $persistent_db{$name} = $store;
788: }
789: untie(%persistent_db);
790: return 1;
791: }
792:
793: ######################################################################
794: ######################################################################
795:
796: =pod
797:
798: =item &make_form_data_persistent()
799:
800: Inputs: filename of persistent database.
801:
802: Store most form variables away to the %persistent_db.
803: Values will be escaped. Values that are array pointers will have their
804: elements escaped and concatenated in a comma seperated string.
805:
806: =cut
807:
808: ######################################################################
809: ######################################################################
810: sub make_form_data_persistent {
811: my $r = shift;
812: my $filename = shift;
813: my %save;
814: foreach (keys(%ENV)) {
815: next if (!/^form/ || /submit/);
816: $save{$_} = $ENV{$_};
817: }
818: return &make_persistent(\%save,$filename);
819: }
820:
821: ######################################################################
822: # HTML form building functions #
823: ######################################################################
824:
825: =pod
826:
827: =item HTML form building functions
828:
829: =over 4
830:
831: =cut
832:
833: ###############################################
834: ###############################################
835:
836: =pod
837:
838: =item &simpletextfield()
839:
840: Inputs: $name,$value,$size
841:
842: Returns a text input field with the given name, value, and size.
843: If size is not specified, a value of 20 is used.
844:
845: =cut
846:
847: ###############################################
848: ###############################################
849:
850: sub simpletextfield {
851: my ($name,$value,$size)=@_;
852: $size = 20 if (! defined($size));
853: return '<input type="text" name="'.$name.
854: '" size="'.$size.'" value="'.$value.'" />';
855: }
856:
857: ###############################################
858: ###############################################
859:
860: =pod
861:
862: =item &simplecheckbox()
863:
864: Inputs: $name,$value
865:
866: Returns a simple check box with the given $name.
867: If $value eq 'on' the box is checked.
868:
869: =cut
870:
871: ###############################################
872: ###############################################
873:
874: sub simplecheckbox {
875: my ($name,$value)=@_;
876: my $checked='';
877: $checked="checked" if $value eq 'on';
878: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
879: }
880:
881: ###############################################
882: ###############################################
883:
884: =pod
885:
886: =item &fieldtitle()
887:
888: Input: $title
889:
890: Returns a scalar with html which will display $title as a search
891: field heading.
892:
893: =cut
894:
895: ###############################################
896: ###############################################
897:
898: sub fieldtitle {
899: my $title = uc(shift());
900: return '<font color="#800000" face="helvetica"><b>'.$title.
901: ': </b></font>';
902: }
903:
904: ###############################################
905: ###############################################
906:
907: =pod
908:
909: =item &searchphrasefield()
910:
911: Inputs: $title,$name,$value
912:
913: Returns html for a title line and an input field for entering search terms.
914: The entry field (which is where the $name and $value are used) is a 50 column
915: simpletextfield. The html returned is for a row in a three column table.
916:
917: =cut
918:
919: ###############################################
920: ###############################################
921:
922: sub searchphrasefield {
923: my ($title,$name,$value)=@_;
924: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
925: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
926: }
927:
928: ###############################################
929: ###############################################
930:
931: =pod
932:
933: =item &searchphrasefield_with_related()
934:
935: Inputs: $title,$name,$value
936:
937: Returns html for a title line and an input field for entering search terms
938: and a check box for 'related words'. The entry field (which is where the
939: $name and $value are used) is a 50 column simpletextfield. The name of
940: the related words checkbox is "$name_related".
941:
942: =cut
943:
944: ###############################################
945: ###############################################
946:
947: sub searchphrasefield_with_related {
948: my ($title,$name,$value)=@_;
949: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
950: &simpletextfield($name,$value,50).'</td><td align="center"> '.
951: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
952: " </td></tr>\n";
953: }
954:
955: ###############################################
956: ###############################################
957:
958: =pod
959:
960: =item &dateboxes()
961:
962: Returns html selection form elements for the specification of
963: the day, month, and year.
964:
965: =cut
966:
967: ###############################################
968: ###############################################
969:
970: sub dateboxes {
971: my ($name,$defaultmonth,$defaultday,$defaultyear,
972: $currentmonth,$currentday,$currentyear)=@_;
973: ($defaultmonth,$defaultday,$defaultyear)=('','','');
974: #
975: # Day
976: my $day=<<END;
977: <select name="${name}_day">
978: <option value='$defaultday'> </option>
979: END
980: for (my $i = 1; $i<=31; $i++) {
981: $day.="<option value=\"$i\">$i</option>\n";
982: }
983: $day.="</select>\n";
984: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
985: #
986: # Month
987: my $month=<<END;
988: <select name="${name}_month">
989: <option value='$defaultmonth'> </option>
990: END
991: my $i = 1;
992: foreach (qw/January February March April May June
993: July August September October November December /){
994: $month .="<option value=\"$i\">$_</option>\n";
995: $i++;
996: }
997: $month.="</select>\n";
998: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
999: #
1000: # Year (obviously)
1001: my $year=<<END;
1002: <select name="${name}_year">
1003: <option value='$defaultyear'> </option>
1004: END
1005: my $maxyear = 2051;
1006: for (my $i = 1976; $i<=$maxyear; $i++) {
1007: $year.="<option value=\"$i\">$i</option>\n";
1008: }
1009: $year.="</select>\n";
1010: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
1011: return "$month$day$year";
1012: }
1013:
1014: ###############################################
1015: ###############################################
1016:
1017: =pod
1018:
1019: =item &selectbox()
1020:
1021: Returns a scalar containing an html <select> form.
1022:
1023: Inputs:
1024:
1025: =over 4
1026:
1027: =item $title
1028:
1029: Printed above the select box, in uppercase. If undefined, only a select
1030: box will be returned, with no additional html.
1031:
1032: =item $name
1033:
1034: The name element of the <select> tag.
1035:
1036: =item $default
1037:
1038: The default value of the form. Can be $anyvalue, or in @idlist.
1039:
1040: =item $anyvalue
1041:
1042: The <option value="..."> used to indicate a default of
1043: none of the values. Can be undef.
1044:
1045: =item $anytag
1046:
1047: The text associate with $anyvalue above.
1048:
1049: =item $functionref
1050:
1051: Each element in @idlist will be passed as a parameter
1052: to the function referenced here. The return value of the function should
1053: be a scalar description of the items. If this value is undefined the
1054: description of each item in @idlist will be the item name.
1055:
1056: =item @idlist
1057:
1058: The items to be selected from. One of these or $anyvalue will be the
1059: value returned by the form element, $ENV{form.$name}.
1060:
1061: =back
1062:
1063: =cut
1064:
1065: ###############################################
1066:
1067: sub selectbox {
1068: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
1069: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
1070: my $selout='';
1071: if (defined($title)) {
1072: my $uctitle=uc($title);
1073: $selout="\n".'<p><font color="#800000" face="helvetica">'.
1074: '<b>'.$uctitle.': </b></font>';
1075: }
1076: $selout .= '<select name="'.$name.'">';
1077: unshift @idlist,$anyvalue if (defined($anyvalue));
1078: foreach (@idlist) {
1079: $selout.='<option value="'.$_.'"';
1080: if ($_ eq $default and !/^any$/) {
1081: $selout.=' selected >'.&{$functionref}($_).'</option>';
1082: }
1083: elsif ($_ eq $default and /^$anyvalue$/) {
1084: $selout.=' selected >'.$anytag.'</option>';
1085: }
1086: else {$selout.='>'.&{$functionref}($_).'</option>';}
1087: }
1088: return $selout.'</select>'.(defined($title)?'</p>':' ');
1089: }
1090:
1091: ######################################################################
1092: # End of HTML form building functions #
1093: ######################################################################
1094:
1095: =pod
1096:
1097: =back
1098:
1099: =cut
1100:
1101:
1102: ######################################################################
1103: ######################################################################
1104:
1105: =pod
1106:
1107: =item &parse_advanced_search()
1108:
1109: Parse advanced search form and return the following:
1110:
1111: =over 4
1112:
1113: =item $query Scalar containing an SQL query.
1114:
1115: =item $customquery Scalar containing a custom query.
1116:
1117: =item $customshow Scalar containing commands to show custom metadata.
1118:
1119: =item $libraries_to_query Reference to array of domains to search.
1120:
1121: =back
1122:
1123: =cut
1124:
1125: ######################################################################
1126: ######################################################################
1127: sub parse_advanced_search {
1128: my ($r,$closebutton)=@_;
1129: my $fillflag=0;
1130: my $pretty_search_string = "<br />\n";
1131: # Clean up fields for safety
1132: for my $field ('title','author','subject','keywords','url','version',
1133: 'creationdatestart_month','creationdatestart_day',
1134: 'creationdatestart_year','creationdateend_month',
1135: 'creationdateend_day','creationdateend_year',
1136: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1137: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1138: 'lastrevisiondateend_day','lastrevisiondateend_year',
1139: 'notes','abstract','mime','language','owner',
1140: 'custommetadata','customshow','category') {
1141: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1142: }
1143: foreach ('mode','form','element') {
1144: # is this required? Hmmm.
1145: next unless (exists($ENV{"form.$_"}));
1146: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1147: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1148: }
1149: # Preprocess the category form element.
1150: $ENV{'form.category'} = 'any' if (ref($ENV{'form.category'}));
1151: if ($ENV{'form.category'} ne 'any') {
1152: my @extensions = &Apache::loncommon::filecategorytypes
1153: ($ENV{'form.category'});
1154: $ENV{'form.mime'} = join ' OR ',@extensions;
1155: }
1156: # Check to see if enough information was filled in
1157: for my $field ('title','author','subject','keywords','url','version',
1158: 'notes','abstract','mime','language','owner',
1159: 'custommetadata') {
1160: if (&filled($ENV{"form.$field"})) {
1161: $fillflag++;
1162: }
1163: }
1164: unless ($fillflag) {
1165: &output_blank_field_error($r,$closebutton,'phase=disp_adv');
1166: return ;
1167: }
1168: # Turn the form input into a SQL-based query
1169: my $query='';
1170: my @queries;
1171: my $font = '<font color="#800000" face="helvetica">';
1172: # Evaluate logical expression AND/OR/NOT phrase fields.
1173: foreach my $field ('title','author','subject','notes','abstract','url',
1174: 'keywords','version','owner','mime') {
1175: if ($ENV{'form.'.$field}) {
1176: my $searchphrase = $ENV{'form.'.$field};
1177: $pretty_search_string .= $font."$field</font> contains <b>".
1178: $searchphrase."</b>";
1179: if ($ENV{'form.'.$field.'_related'}) {
1180: my @New_Words;
1181: ($searchphrase,@New_Words) = &related_version($searchphrase);
1182: if (@New_Words) {
1183: $pretty_search_string .= " with related words: ".
1184: "<b>@New_Words</b>.";
1185: } else {
1186: $pretty_search_string .= " with no related words.";
1187: }
1188: }
1189: $pretty_search_string .= "<br />\n";
1190: push @queries,&build_SQL_query($field,$searchphrase);
1191: }
1192: }
1193: # I dislike the hack below.
1194: if ($ENV{'form.category'}) {
1195: $ENV{'form.mime'}='';
1196: }
1197: # Evaluate option lists
1198: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1199: push @queries,"(language like \"$ENV{'form.language'}\")";
1200: $pretty_search_string.=$font."language</font>= ".
1201: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1202: "<br />\n";
1203: }
1204: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1205: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1206: $pretty_search_string.=$font."copyright</font> = ".
1207: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1208: "<br \>\n";
1209: }
1210: #
1211: # Evaluate date windows
1212: my $datequery=&build_date_queries(
1213: $ENV{'form.creationdatestart_month'},
1214: $ENV{'form.creationdatestart_day'},
1215: $ENV{'form.creationdatestart_year'},
1216: $ENV{'form.creationdateend_month'},
1217: $ENV{'form.creationdateend_day'},
1218: $ENV{'form.creationdateend_year'},
1219: $ENV{'form.lastrevisiondatestart_month'},
1220: $ENV{'form.lastrevisiondatestart_day'},
1221: $ENV{'form.lastrevisiondatestart_year'},
1222: $ENV{'form.lastrevisiondateend_month'},
1223: $ENV{'form.lastrevisiondateend_day'},
1224: $ENV{'form.lastrevisiondateend_year'},
1225: );
1226: # Test to see if date windows are legitimate
1227: if ($datequery=~/^Incorrect/) {
1228: &output_date_error($r,$datequery,$closebutton);
1229: return ;
1230: } elsif ($datequery) {
1231: # Here is where you would set up pretty_search_string to output
1232: # date query information.
1233: push @queries,$datequery;
1234: }
1235: # Process form information for custom metadata querying
1236: my $customquery=undef;
1237: # if ($ENV{'form.custommetadata'}) {
1238: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1239: # $ENV{'form.custommetadata'}."</b><br />\n";
1240: # $customquery=&build_custommetadata_query('custommetadata',
1241: # $ENV{'form.custommetadata'});
1242: # }
1243: my $customshow=undef;
1244: # if ($ENV{'form.customshow'}) {
1245: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1246: # $ENV{'form.customshow'}."</b><br />\n";
1247: # $customshow=$ENV{'form.customshow'};
1248: # $customshow=~s/[^\w\s]//g;
1249: # my @fields=split(/\s+/,$customshow);
1250: # $customshow=join(" ",@fields);
1251: # }
1252: ## ---------------------------------------------------------------
1253: ## Deal with restrictions to given domains
1254: ##
1255: my $libraries_to_query = undef;
1256: # $ENV{'form.domains'} can be either a scalar or an array reference.
1257: # We need an array.
1258: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1259: : ($ENV{'form.domains'}) );
1260: my %domain_hash = ();
1261: my $pretty_domains_string;
1262: foreach (@allowed_domains) {
1263: $domain_hash{$_}++;
1264: }
1265: if ($domain_hash{'any'}) {
1266: $pretty_domains_string = "In all LON-CAPA domains.";
1267: } else {
1268: if (@allowed_domains > 1) {
1269: $pretty_domains_string = "In LON-CAPA domains:";
1270: } else {
1271: $pretty_domains_string = "In LON-CAPA domain ";
1272: }
1273: foreach (sort @allowed_domains) {
1274: $pretty_domains_string .= "<b>".$_."</b> ";
1275: }
1276: foreach (keys(%Apache::lonnet::libserv)) {
1277: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1278: push @$libraries_to_query,$_;
1279: }
1280: }
1281: }
1282: $pretty_search_string .= $pretty_domains_string."<br />\n";
1283: #
1284: if (@queries) {
1285: $query=join(" AND ",@queries);
1286: $query="select * from metadata where $query";
1287: } elsif ($customquery) {
1288: $query = '';
1289: }
1290: return ($query,$customquery,$customshow,$libraries_to_query,
1291: $pretty_search_string);
1292: }
1293:
1294: ######################################################################
1295: ######################################################################
1296:
1297: =pod
1298:
1299: =item &parse_basic_search()
1300:
1301: Parse the basic search form and return a scalar containing an sql query.
1302:
1303: =cut
1304:
1305: ######################################################################
1306: ######################################################################
1307: sub parse_basic_search {
1308: my ($r,$closebutton)=@_;
1309: # Clean up fields for safety
1310: for my $field ('basicexp') {
1311: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1312: }
1313: foreach ('mode','form','element') {
1314: # is this required? Hmmm.
1315: next unless (exists($ENV{"form.$_"}));
1316: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1317: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1318: }
1319:
1320: # Check to see if enough is filled in
1321: unless (&filled($ENV{'form.basicexp'})) {
1322: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1323: return OK;
1324: }
1325: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1326: my $search_string = $ENV{'form.basicexp'};
1327: if ($ENV{'form.related'}) {
1328: my @New_Words;
1329: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1330: if (@New_Words) {
1331: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1332: } else {
1333: $pretty_search_string .= " with no related words.";
1334: }
1335: }
1336: # Build SQL query string based on form page
1337: my $query='';
1338: my $concatarg=join('," ",',
1339: ('title', 'author', 'subject', 'notes', 'abstract',
1340: 'keywords'));
1341: $concatarg='title' if $ENV{'form.titleonly'};
1342: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1343: $pretty_search_string .= "<br />\n";
1344: return 'select * from metadata where '.$query,$pretty_search_string;
1345: }
1346:
1347:
1348: ######################################################################
1349: ######################################################################
1350:
1351: =pod
1352:
1353: =item &related_version
1354:
1355: Modifies an input string to include related words. Words in the string
1356: are replaced with parenthesized lists of 'OR'd words. For example
1357: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1358:
1359: Note: Using this twice on a string is probably silly.
1360:
1361: =cut
1362:
1363: ######################################################################
1364: ######################################################################
1365: sub related_version {
1366: my $search_string = shift;
1367: my $result = $search_string;
1368: my %New_Words = ();
1369: while ($search_string =~ /(\w+)/cg) {
1370: my $word = $1;
1371: next if (lc($word) =~ /\b(or|and|not)\b/);
1372: my @Words = &Apache::loncommon::get_related_words($word);
1373: @Words = ($#Words>4? @Words[0..4] : @Words);
1374: foreach (@Words) { $New_Words{$_}++;}
1375: my $replacement = join " OR ", ($word,@Words);
1376: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1377: }
1378: return $result,sort(keys(%New_Words));
1379: }
1380:
1381: ######################################################################
1382: ######################################################################
1383:
1384: =pod
1385:
1386: =item &build_SQL_query()
1387:
1388: Builds a SQL query string from a logical expression with AND/OR keywords
1389: using Text::Query and &recursive_SQL_query_builder()
1390:
1391: =cut
1392:
1393: ######################################################################
1394: ######################################################################
1395: sub build_SQL_query {
1396: my ($field_name,$logic_statement)=@_;
1397: my $q=new Text::Query('abc',
1398: -parse => 'Text::Query::ParseAdvanced',
1399: -build => 'Text::Query::Build');
1400: $q->prepare($logic_statement);
1401: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1402: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1403: return $sql_query;
1404: }
1405:
1406: ######################################################################
1407: ######################################################################
1408:
1409: =pod
1410:
1411: =item &build_custommetadata_query()
1412:
1413: Constructs a custom metadata query using a rather heinous regular
1414: expression.
1415:
1416: =cut
1417:
1418: ######################################################################
1419: ######################################################################
1420: sub build_custommetadata_query {
1421: my ($field_name,$logic_statement)=@_;
1422: my $q=new Text::Query('abc',
1423: -parse => 'Text::Query::ParseAdvanced',
1424: -build => 'Text::Query::BuildAdvancedString');
1425: $q->prepare($logic_statement);
1426: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1427: # quick fix to change literal into xml tag-matching
1428: # will eventually have to write a separate builder module
1429: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1430: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1431: /\\<$1\\>?# \<wordone\>
1432: \[\^\\<\]?# [^\<]
1433: \*$2\[\^\\<\]?# *wordtwo[^\<]
1434: \*\\<\\\/$1\\>?# *\<\/wordone\>
1435: /g;
1436: return $matchexp;
1437: }
1438:
1439: ######################################################################
1440: ######################################################################
1441:
1442: =pod
1443:
1444: =item &recursive_SQL_query_build()
1445:
1446: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1447:
1448: =cut
1449:
1450: ######################################################################
1451: ######################################################################
1452: sub recursive_SQL_query_build {
1453: my ($dkey,$pattern)=@_;
1454: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1455: return $pattern unless @matches;
1456: foreach my $match (@matches) {
1457: $match=~/\[ (\w+)\s(.*) \]/;
1458: my ($key,$value)=($1,$2);
1459: my $replacement='';
1460: if ($key eq 'literal') {
1461: $replacement="($dkey like \"\%$value\%\")";
1462: }
1463: elsif ($key eq 'not') {
1464: $value=~s/like/not like/;
1465: # $replacement="($dkey not like $value)";
1466: $replacement="$value";
1467: }
1468: elsif ($key eq 'and') {
1469: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1470: $replacement="($1 AND $2)";
1471: }
1472: elsif ($key eq 'or') {
1473: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1474: $replacement="($1 OR $2)";
1475: }
1476: substr($pattern,
1477: index($pattern,$match),
1478: length($match),
1479: $replacement
1480: );
1481: }
1482: &recursive_SQL_query_build($dkey,$pattern);
1483: }
1484:
1485: ######################################################################
1486: ######################################################################
1487:
1488: =pod
1489:
1490: =item &build_date_queries()
1491:
1492: Builds a SQL logic query to check time/date entries.
1493: Also reports errors (check for /^Incorrect/).
1494:
1495: =cut
1496:
1497: ######################################################################
1498: ######################################################################
1499: sub build_date_queries {
1500: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1501: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1502: my @queries;
1503: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1504: unless ($cmonth1 and $cday1 and $cyear1 and
1505: $cmonth2 and $cday2 and $cyear2) {
1506: return "Incorrect entry for the creation date. You must specify ".
1507: "a starting month, day, and year and an ending month, ".
1508: "day, and year.";
1509: }
1510: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1511: $cnumeric1+=0;
1512: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1513: $cnumeric2+=0;
1514: if ($cnumeric1>$cnumeric2) {
1515: return "Incorrect entry for the creation date. The starting ".
1516: "date must occur before the ending date.";
1517: }
1518: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1519: "$cyear2-$cmonth2-$cday2 23:59:59')";
1520: push @queries,$cquery;
1521: }
1522: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1523: unless ($lmonth1 and $lday1 and $lyear1 and
1524: $lmonth2 and $lday2 and $lyear2) {
1525: return "Incorrect entry for the last revision date. You must ".
1526: "specify a starting month, day, and year and an ending ".
1527: "month, day, and year.";
1528: }
1529: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1530: $lnumeric1+=0;
1531: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1532: $lnumeric2+=0;
1533: if ($lnumeric1>$lnumeric2) {
1534: return "Incorrect entry for the last revision date. The ".
1535: "starting date must occur before the ending date.";
1536: }
1537: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1538: "$lyear2-$lmonth2-$lday2 23:59:59')";
1539: push @queries,$lquery;
1540: }
1541: if (@queries) {
1542: return join(" AND ",@queries);
1543: }
1544: return '';
1545: }
1546:
1547: ######################################################################
1548: ######################################################################
1549:
1550: =pod
1551:
1552: =item ©right_check()
1553:
1554: =cut
1555:
1556: ######################################################################
1557: ######################################################################
1558: sub copyright_check {
1559: my $Metadata = shift;
1560: # Check copyright tags and skip results the user cannot use
1561: my (undef,undef,$resdom,$resname) = split('/',
1562: $Metadata->{'url'});
1563: # Check for priv
1564: if (($Metadata->{'copyright'} eq 'priv') &&
1565: (($ENV{'user.name'} ne $resname) &&
1566: ($ENV{'user.domain'} ne $resdom))) {
1567: return 0;
1568: }
1569: # Check for domain
1570: if (($Metadata->{'copyright'} eq 'domain') &&
1571: ($ENV{'user.domain'} ne $resdom)) {
1572: return 0;
1573: }
1574: return 1;
1575: }
1576:
1577:
1578: ######################################################################
1579: ######################################################################
1580:
1581: =pod
1582:
1583: =item &ensure_db_and_table
1584:
1585: Ensure we can get lonmysql to connect to the database and the table we
1586: need exists.
1587:
1588: Inputs: $r, table id
1589:
1590: Returns: undef on error, 1 if the table exists.
1591:
1592: =cut
1593:
1594: ######################################################################
1595: ######################################################################
1596: sub ensure_db_and_table {
1597: my ($r,$table) = @_;
1598: ##
1599: ## Sanity check the table id.
1600: ##
1601: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1602: $r->print("Unable to retrieve search results. ".
1603: "Unable to determine the table results were stored in. ".
1604: "</body></html>");
1605: return undef;
1606: }
1607: ##
1608: ## Make sure we can connect and the table exists.
1609: ##
1610: my $connection_result = &Apache::lonmysql::connect_to_db();
1611: if (!defined($connection_result)) {
1612: $r->print("Unable to connect to the MySQL database where your results".
1613: " are stored. </body></html>");
1614: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1615: " connect to database.");
1616: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1617: return undef;
1618: }
1619: my $table_check = &Apache::lonmysql::check_table($table);
1620: if (! defined($table_check)) {
1621: $r->print("A MySQL error has occurred.</form></body></html>");
1622: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1623: " of table ".$table);
1624: return undef;
1625: } elsif (! $table_check) {
1626: $r->print("The table of results could not be found.");
1627: &Apache::lonnet::logthis("The user requested a table, ".$table.
1628: ", that could not be found.");
1629: return undef;
1630: }
1631: return 1;
1632: }
1633:
1634: ######################################################################
1635: ######################################################################
1636:
1637: =pod
1638:
1639: =item &print_sort_form
1640:
1641: =cut
1642:
1643: ######################################################################
1644: ######################################################################
1645: sub print_sort_form {
1646: my ($r,$pretty_query_string) = @_;
1647: ##
1648: my %SortableFields =
1649: (id => 'Default',
1650: title => 'Title',
1651: author => 'Author',
1652: subject => 'Subject',
1653: url => 'URL',
1654: version => 'Version Number',
1655: mime => 'Mime type',
1656: lang => 'Language',
1657: owner => 'Owner/Publisher',
1658: copyright => 'Copyright',
1659: hostname => 'Host',
1660: creationdate => 'Creation Date',
1661: lastrevisiondate => 'Revision Date',
1662: );
1663: ##
1664: my $table = $ENV{'form.table'};
1665: return if (! &ensure_db_and_table($r,$table));
1666: ##
1667: ## Get the number of results
1668: ##
1669: my $total_results = &Apache::lonmysql::number_of_rows($table);
1670: if (! defined($total_results)) {
1671: $r->print("A MySQL error has occurred.</form></body></html>");
1672: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1673: " of rows in table ".$table);
1674: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1675: return;
1676: }
1677: my $result;
1678: $result.=<<END;
1679: <html>
1680: <head>
1681: <script>
1682: function change_sort() {
1683: var newloc = "/adm/searchcat?phase=results";
1684: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1685: newloc += "&sortby=";
1686: newloc += document.forms.statusform.elements.sortby.value;
1687: parent.resultsframe.location= newloc;
1688: }
1689: </script>
1690: <title>Results</title>
1691: </head>
1692: $bodytag
1693: <form name="statusform" action="" method="post">
1694: <input type="hidden" name="Queue" value="" />
1695: END
1696:
1697: #<h2>Sort Results</h2>
1698: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1699: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1700: # foreach (keys(%SortableFields)) {
1701: # $result.="<option name=\"$_\"";
1702: # if ($_ eq $ENV{'form.sortby'}) {
1703: # $result.=" selected ";
1704: # }
1705: # $result.=" >$SortableFields{$_}</option>\n";
1706: # }
1707: # $result.="</select>\n";
1708: my $revise = &revise_button();
1709: $result.=<<END;
1710: <p>
1711: There are $total_results matches to your query. $revise
1712: </p><p>
1713: Search:$pretty_query_string
1714: </p>
1715: </form>
1716: </body>
1717: </html>
1718: END
1719: $r->print($result);
1720: return;
1721: }
1722:
1723: #####################################################################
1724: #####################################################################
1725:
1726: =pod
1727:
1728: =item MySQL Table Description
1729:
1730: MySQL table creation requires a precise description of the data to be
1731: stored. The use of the correct types to hold data is vital to efficient
1732: storage and quick retrieval of records. The columns must be described in
1733: the following format:
1734:
1735: =cut
1736:
1737: ##
1738: ## Restrictions:
1739: ## columns of type 'text' and 'blob' cannot have defaults.
1740: ## columns of type 'enum' cannot be used for FULLTEXT.
1741: ##
1742: my @DataOrder = qw/id title author subject url keywords version notes
1743: abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
1744:
1745: my %Datatypes =
1746: ( id =>{ type => 'MEDIUMINT',
1747: restrictions => 'UNSIGNED NOT NULL',
1748: primary_key => 'yes',
1749: auto_inc => 'yes'
1750: },
1751: title =>{ type=>'TEXT'},
1752: author =>{ type=>'TEXT'},
1753: subject =>{ type=>'TEXT'},
1754: url =>{ type=>'TEXT',
1755: restrictions => 'NOT NULL' },
1756: keywords =>{ type=>'TEXT'},
1757: version =>{ type=>'TEXT'},
1758: notes =>{ type=>'TEXT'},
1759: abstract =>{ type=>'TEXT'},
1760: mime =>{ type=>'TEXT'},
1761: lang =>{ type=>'TEXT'},
1762: owner =>{ type=>'TEXT'},
1763: copyright =>{ type=>'TEXT'},
1764: hostname =>{ type=>'TEXT'},
1765: #--------------------------------------------------
1766: creationdate =>{ type=>'DATETIME'},
1767: lastrevisiondate =>{ type=>'DATETIME'},
1768: #--------------------------------------------------
1769: );
1770:
1771: my @Fullindicies =
1772: qw/title/;
1773: # qw/title author subject abstract mime language owner copyright/;
1774:
1775: ######################################################################
1776: ######################################################################
1777:
1778: =pod
1779:
1780: =item &create_results_table()
1781:
1782: Creates the table of search results by calling lonmysql. Stores the
1783: table id in $ENV{'form.table'}
1784:
1785: Inputs: none.
1786:
1787: Returns: the identifier of the table on success, undef on error.
1788:
1789: =cut
1790:
1791: ######################################################################
1792: ######################################################################
1793: sub create_results_table {
1794: my $table = &Apache::lonmysql::create_table
1795: ( { columns => \%Datatypes,
1796: column_order => \@DataOrder,
1797: fullindex => \@Fullindicies,
1798: } );
1799: if (defined($table)) {
1800: $ENV{'form.table'} = $table;
1801: return $table;
1802: }
1803: return undef; # Error...
1804: }
1805:
1806: ######################################################################
1807: ######################################################################
1808:
1809: =pod
1810:
1811: =item Search Status update functions
1812:
1813: Each of the following functions changes the values of one of the
1814: input fields used to display the search status to the user. The names
1815: should be explanatory.
1816:
1817: Inputs: Apache request handler ($r), text to display.
1818:
1819: Returns: Nothing.
1820:
1821: =over 4
1822:
1823: =item &update_count_status()
1824:
1825: =item &update_status()
1826:
1827: =item &update_seconds()
1828:
1829: =back
1830:
1831: =cut
1832:
1833: ######################################################################
1834: ######################################################################
1835: sub update_count_status {
1836: my ($r,$text) = @_;
1837: $text =~ s/\'/\\\'/g;
1838: $r->print
1839: ("<script>document.statusform.count.value = ' $text'</script>\n");
1840: $r->rflush();
1841: }
1842:
1843: sub update_status {
1844: my ($r,$text) = @_;
1845: $text =~ s/\'/\\\'/g;
1846: $r->print
1847: ("<script>document.statusform.status.value = ' $text'</script>\n");
1848: $r->rflush();
1849: }
1850:
1851: sub update_seconds {
1852: my ($r,$text) = @_;
1853: $text =~ s/\'/\\\'/g;
1854: $r->print
1855: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1856: $r->rflush();
1857: }
1858:
1859: ######################################################################
1860: ######################################################################
1861:
1862: =pod
1863:
1864: =item &revise_button
1865:
1866: Inputs: None
1867:
1868: Returns: html string for a 'revise search' button.
1869:
1870: =cut
1871:
1872: ######################################################################
1873: ######################################################################
1874: sub revise_button {
1875: my $revise_phase = 'disp_basic';
1876: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1877: my $newloc = '/adm/searchcat'.
1878: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1879: '&cleargroupsort=1'.
1880: '&phase='.$revise_phase;
1881: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1882: qq{ onClick="parent.location='$newloc';" /> };
1883: return $result;
1884: }
1885:
1886: ######################################################################
1887: ######################################################################
1888:
1889: =pod
1890:
1891: =item &run_search
1892:
1893: =cut
1894:
1895: ######################################################################
1896: ######################################################################
1897: sub run_search {
1898: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1899: my $connection = $r->connection;
1900: #
1901: # Timing variables
1902: #
1903: my $starttime = time;
1904: my $max_time = 30; # seconds for the search to complete
1905: #
1906: # Print run_search header
1907: #
1908: $r->print(<<END);
1909: <html>
1910: <head><title>Search Status</title></head>
1911: $bodytag
1912: <form name="statusform" action="" method="post">
1913: <input type="hidden" name="Queue" value="" />
1914: END
1915: # Check to see if $pretty_string has more than one carriage return.
1916: # Assume \n s are following <br /> s and truncate the value.
1917: # (there is probably a better way)...
1918: my @Lines = split /<br \/>/,$pretty_string;
1919: if (@Lines > 2) {
1920: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1921: }
1922: $r->print("Search: ".$pretty_string);
1923: $r->rflush();
1924: #
1925: # Determine the servers we need to contact.
1926: #
1927: my @Servers_to_contact;
1928: if (defined($serverlist)) {
1929: if (ref($serverlist) eq 'ARRAY') {
1930: @Servers_to_contact = @$serverlist;
1931: } else {
1932: @Servers_to_contact = ($serverlist);
1933: }
1934: } else {
1935: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1936: }
1937: my %Server_status;
1938: my $table =$ENV{'form.table'};
1939: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1940: $r->print("Unable to determine table id to store search results in.".
1941: "The search has been aborted.</body></html>");
1942: return;
1943: }
1944: my $table_status = &Apache::lonmysql::check_table($table);
1945: if (! defined($table_status)) {
1946: $r->print("Unable to determine status of table.</body></html>");
1947: &Apache::lonnet::logthis("Bogus table id of $table for ".
1948: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1949: &Apache::lonnet::logthis("lonmysql error = ".
1950: &Apache::lonmysql::get_error());
1951: return;
1952: }
1953: if (! $table_status) {
1954: $r->print("The table id,$table, we tried to use is invalid.".
1955: "The search has been aborted.</body></html>");
1956: return;
1957: }
1958: ##
1959: ## Prepare for the big loop.
1960: ##
1961: my $hitcountsum;
1962: my $server;
1963: my $status;
1964: my $revise = &revise_button();
1965: $r->print(<<END);
1966: <table>
1967: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1968: <tr>
1969: <td><input type="text" name="status" value="" size="30" /></td>
1970: <td><input type="text" name="count" value="" size="10" /></td>
1971: <td><input type="text" name="seconds" value="" size="8" /></td>
1972: <td>$revise</td>
1973: </tr>
1974: </table>
1975: </form>
1976: END
1977: $r->rflush();
1978: my $time_remaining = $max_time - (time - $starttime) ;
1979: my $last_time = $time_remaining;
1980: &update_seconds($r,$time_remaining);
1981: while (($time_remaining > 0) &&
1982: ((@Servers_to_contact) || keys(%Server_status))) {
1983: # Send out a search request if it needs to be done.
1984: if (@Servers_to_contact) {
1985: # Contact one server
1986: my $server = shift(@Servers_to_contact);
1987: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
1988: $customshow,[$server]);
1989: ($server) = keys(%$reply);
1990: $Server_status{$server} = $reply->{$server};
1991: &update_status($r,'contacting '.$server);
1992: } else {
1993: # wait a sec. to give time for files to be written
1994: # This sleep statement is here instead of outside the else
1995: # block because we do not want to pause if we have servers
1996: # left to contact.
1997: sleep(1);
1998: }
1999: #
2000: if (scalar (keys(%Server_status))) {
2001: &update_status($r,'waiting on '.(join(' ',keys(%Server_status))));
2002: }
2003: #
2004: # Loop through the servers we have contacted but do not
2005: # have results from yet, looking for results.
2006: while (my ($server,$status) = each(%Server_status)) {
2007: last if ($connection->aborted());
2008: if ($status eq 'con_lost') {
2009: delete ($Server_status{$server});
2010: next;
2011: }
2012: $status=~/^([\.\w]+)$/;
2013: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2014: if (-e $datafile && ! -e "$datafile.end") {
2015: &update_status($r,'Receiving results from '.$server);
2016: next;
2017: }
2018: last if ($connection->aborted());
2019: if (-e "$datafile.end") {
2020: &update_status($r,'Reading results from '.$server);
2021: if (-z "$datafile") {
2022: delete($Server_status{$server});
2023: next;
2024: }
2025: my $fh;
2026: if (!($fh=Apache::File->new($datafile))) {
2027: $r->print("Unable to open search results file for ".
2028: "server $server. Omitting from search");
2029: delete($Server_status{$server});
2030: next;
2031: }
2032: # Read in the whole file.
2033: while (my $result = <$fh>) {
2034: last if ($connection->aborted());
2035: # handle custom fields? Someday we will!
2036: chomp($result);
2037: next unless $result;
2038: # Parse the result.
2039: my %Fields = &parse_raw_result($result,$server);
2040: $Fields{'hostname'} = $server;
2041: next if (! ©right_check(\%Fields));
2042: # Store the result in the mysql database
2043: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2044: if (! defined($result)) {
2045: $r->print(&Apache::lonmysql::get_error());
2046: }
2047: # $r->print(&Apache::lonmysql::get_debug());
2048: $hitcountsum ++;
2049: $time_remaining = $max_time - (time - $starttime) ;
2050: if ($last_time - $time_remaining > 0) {
2051: &update_seconds($r,$time_remaining);
2052: $last_time = $time_remaining;
2053: }
2054: if ($hitcountsum % 50 == 0) {
2055: &update_count_status($r,$hitcountsum);
2056: }
2057: } # End of foreach (@results)
2058: $fh->close();
2059: # $server is only deleted if the results file has been
2060: # found and (successfully) opened. This may be a bad idea.
2061: delete($Server_status{$server});
2062: }
2063: last if ($connection->aborted());
2064: &update_count_status($r,$hitcountsum);
2065: }
2066: last if ($connection->aborted());
2067: # Finished looping through the servers
2068: $starttime = time if (@Servers_to_contact);
2069: $time_remaining = $max_time - (time - $starttime) ;
2070: if ($last_time - $time_remaining > 0) {
2071: $last_time = $time_remaining;
2072: &update_seconds($r,$time_remaining);
2073: }
2074: }
2075: &update_status($r,'Search Complete'.$server);
2076: &update_seconds($r,0);
2077: &Apache::lonmysql::disconnect_from_db();
2078: # We have run out of time or run out of servers to talk to and
2079: # results to get.
2080: $r->print("</body></html>");
2081: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2082: $r->print("<script>".
2083: "window.location='/adm/searchcat?".
2084: "phase=sort&".
2085: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2086: "</script>");
2087: }
2088: return;
2089: }
2090:
2091: ######################################################################
2092: ######################################################################
2093: =pod
2094:
2095: =item &prev_next_buttons
2096:
2097: =cut
2098:
2099: ######################################################################
2100: ######################################################################
2101: sub prev_next_buttons {
2102: my ($current_min,$show,$total,$parms) = @_;
2103: return '' if ($show eq 'all'); # No links if you get them all at once.
2104: my $links;
2105: ##
2106: ## Prev
2107: my $prev_min = $current_min - $show;
2108: $prev_min = 1 if $prev_min < 1;
2109: if ($prev_min < $current_min) {
2110: $links .= qq{
2111: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2112: };
2113: } else {
2114: $links .= 'prev';
2115: }
2116: ##
2117: ## Pages.... Someday.
2118: ##
2119: $links .= qq{
2120: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2121: };
2122: ##
2123: ## Next
2124: my $next_min = $current_min + $show;
2125: $next_min = $current_min if ($next_min > $total);
2126: if ($next_min != $current_min) {
2127: $links .= qq{
2128: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2129: };
2130: } else {
2131: $links .= ' next';
2132: }
2133: return $links;
2134: }
2135: ######################################################################
2136: ######################################################################
2137:
2138: =pod
2139:
2140: =item &display_results
2141:
2142: =cut
2143:
2144: ######################################################################
2145: ######################################################################
2146: sub display_results {
2147: my ($r,$importbutton,$closebutton) = @_;
2148: my $connection = $r->connection;
2149: $r->print(&search_results_header($importbutton,$closebutton));
2150: ##
2151: ## Set viewing function
2152: ##
2153: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2154: if (!defined($viewfunction)) {
2155: $r->print("Internal Error - Bad view selected.\n");
2156: $r->rflush();
2157: return;
2158: }
2159: ##
2160: ## $checkbox_num is a count of the number of checkboxes output on the
2161: ## page this is used only during catalogmode=groupsearch.
2162: my $checkbox_num = 0;
2163: ##
2164: ## Get the catalog controls setup
2165: ##
2166: my $action = "/adm/searchcat?phase=results";
2167: ##
2168: ## Deal with groupsearch
2169: ##
2170: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2171: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2172: &GDBM_WRCREAT(),0640)) {
2173: $r->print('Unable to store import results.</form></body></html>');
2174: $r->rflush();
2175: return;
2176: }
2177: }
2178: ##
2179: ## Prepare the table for querying
2180: ##
2181: my $table = $ENV{'form.table'};
2182: return if (! &ensure_db_and_table($r,$table));
2183: ##
2184: ## Get the number of results
2185: ##
2186: my $total_results = &Apache::lonmysql::number_of_rows($table);
2187: if (! defined($total_results)) {
2188: $r->print("A MySQL error has occurred.</form></body></html>");
2189: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2190: " of rows in table ".$table);
2191: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2192: return;
2193: }
2194: ##
2195: ## Determine how many results we need to get
2196: ##
2197: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2198: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2199: my $min = $ENV{'form.start'};
2200: my $max;
2201: if ($ENV{'form.show'} eq 'all') {
2202: $max = $total_results ;
2203: } else {
2204: $max = $min + $ENV{'form.show'} - 1;
2205: $max = $total_results if ($max > $total_results);
2206: }
2207: ##
2208: ## Output links (if necessary) for 'prev' and 'next' pages.
2209: ##
2210: $r->print
2211: ('<center>'.
2212: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2213: "table=".$ENV{'form.table'}.
2214: "&phase=results".
2215: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2216: ."</center>\n"
2217: );
2218: if ($total_results == 0) {
2219: $r->print("There are currently no results.\n".
2220: "</form></body></html>");
2221: return;
2222: } else {
2223: $r->print
2224: ("<center>Results $min to $max out of $total_results</center>\n");
2225: }
2226: ##
2227: ## Get results from MySQL table
2228: ##
2229: my @Results = &Apache::lonmysql::get_rows($table,
2230: 'id>='.$min.' AND id<='.$max);
2231: ##
2232: ## Loop through the results and output them.
2233: ##
2234: foreach my $row (@Results) {
2235: if ($connection->aborted()) {
2236: untie %groupsearch_db if (tied(%groupsearch_db));
2237: &Apache::lonmysql::disconnect_from_db();
2238: return;
2239: }
2240: my %Fields = %{&parse_row(@$row)};
2241: my $output="<p>\n";
2242: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2243: $Fields{'id'},$checkbox_num++);
2244: # Render the result into html
2245: $output.= &$viewfunction($prefix,%Fields);
2246: # Print them out as they come in.
2247: $r->print($output);
2248: $r->rflush();
2249: }
2250: if (@Results < 1) {
2251: $r->print("There were no results matching your query");
2252: } else {
2253: $r->print
2254: ('<center>'.
2255: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2256: "table=".$ENV{'form.table'}.
2257: "&phase=results".
2258: "&persistent_db_id=".
2259: $ENV{'form.persistent_db_id'})
2260: ."</center>\n"
2261: );
2262: }
2263: $r->print("</form></body></html>");
2264: $r->rflush();
2265: untie %groupsearch_db if (tied(%groupsearch_db));
2266: return;
2267: }
2268:
2269: ######################################################################
2270: ######################################################################
2271:
2272: =pod
2273:
2274: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2275:
2276: Returns html needed for the various catalog modes. Gets inputs from
2277: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2278:
2279: =cut
2280:
2281: ######################################################################
2282: ######################################################################
2283: sub catalogmode_output {
2284: my $output = '';
2285: my ($title,$url,$fnum,$checkbox_num) = @_;
2286: if ($ENV{'form.catalogmode'} eq 'interactive') {
2287: $title=~ s/\'/\\\'/g;
2288: if ($ENV{'form.catalogmode'} eq 'interactive') {
2289: $output.=<<END
2290: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2291: onClick="javascript:select_data('$title','$url')">
2292: </font>
2293: END
2294: }
2295: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2296: $groupsearch_db{"pre_${fnum}_link"}=$url;
2297: $groupsearch_db{"pre_${fnum}_title"}=$title;
2298: $output.=<<END;
2299: <font size='-1'>
2300: <input type="checkbox" name="returnvalues" value="SELECT"
2301: onClick="javascript:queue($checkbox_num,$fnum)" />
2302: </font>
2303: END
2304: }
2305: return $output;
2306: }
2307: ######################################################################
2308: ######################################################################
2309:
2310: =pod
2311:
2312: =item &parse_row
2313:
2314: Parse a row returned from the database.
2315:
2316: =cut
2317:
2318: ######################################################################
2319: ######################################################################
2320: sub parse_row {
2321: my @Row = @_;
2322: my %Fields;
2323: for (my $i=0;$i<=$#Row;$i++) {
2324: $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
2325: }
2326: $Fields{'language'} =
2327: &Apache::loncommon::languagedescription($Fields{'lang'});
2328: $Fields{'copyrighttag'} =
2329: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2330: $Fields{'mimetag'} =
2331: &Apache::loncommon::filedescription($Fields{'mime'});
2332: return \%Fields;
2333: }
2334:
2335: ###########################################################
2336: ###########################################################
2337:
2338: =pod
2339:
2340: =item &parse_raw_result()
2341:
2342: Takes a line from the file of results and parse it. Returns a hash
2343: with keys for the following fields:
2344: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
2345: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
2346: 'lastrevisiondate'.
2347:
2348: In addition, the following tags are set by calling the appropriate
2349: lonnet function: 'language', 'cprtag', 'mimetag'.
2350:
2351: The 'title' field is set to "Untitled" if the title field is blank.
2352:
2353: 'abstract' and 'keywords' are truncated to 200 characters.
2354:
2355: =cut
2356:
2357: ###########################################################
2358: ###########################################################
2359: sub parse_raw_result {
2360: my ($result,$hostname) = @_;
2361: # Check for a comma - if it is there then we do not need to unescape the
2362: # string. There seems to be some kind of problem with some items in
2363: # the database - the entire string gets sent out unescaped...?
2364: unless ($result =~ /,/) {
2365: $result = &Apache::lonnet::unescape($result);
2366: }
2367: my @fields=map {
2368: &Apache::lonnet::unescape($_);
2369: } (split(/\,/,$result));
2370: my ($title,$author,$subject,$url,$keywords,$version,
2371: $notes,$abstract,$mime,$lang,
2372: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
2373: my %Fields =
2374: ( title => &Apache::lonnet::unescape($title),
2375: author => &Apache::lonnet::unescape($author),
2376: subject => &Apache::lonnet::unescape($subject),
2377: url => &Apache::lonnet::unescape($url),
2378: keywords => &Apache::lonnet::unescape($keywords),
2379: version => &Apache::lonnet::unescape($version),
2380: notes => &Apache::lonnet::unescape($notes),
2381: abstract => &Apache::lonnet::unescape($abstract),
2382: mime => &Apache::lonnet::unescape($mime),
2383: lang => &Apache::lonnet::unescape($lang),
2384: owner => &Apache::lonnet::unescape($owner),
2385: copyright => &Apache::lonnet::unescape($copyright),
2386: creationdate => &Apache::lonnet::unescape($creationdate),
2387: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
2388: );
2389: $Fields{'language'} =
2390: &Apache::loncommon::languagedescription($Fields{'lang'});
2391: $Fields{'copyrighttag'} =
2392: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2393: $Fields{'mimetag'} =
2394: &Apache::loncommon::filedescription($Fields{'mime'});
2395: if ($Fields{'author'}=~/^(\s*|error)$/) {
2396: $Fields{'author'}="Unknown Author";
2397: }
2398: # Put spaces in the keyword list, if needed.
2399: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
2400: if ($Fields{'title'}=~ /^\s*$/ ) {
2401: $Fields{'title'}='Untitled';
2402: }
2403: unless ($ENV{'user.adv'}) {
2404: # What is this anyway?
2405: $Fields{'keywords'} = '- not displayed -';
2406: $Fields{'notes'} = '- not displayed -';
2407: $Fields{'abstract'} = '- not displayed -';
2408: $Fields{'subject'} = '- not displayed -';
2409: }
2410: if (length($Fields{'abstract'})>200) {
2411: $Fields{'abstract'} =
2412: substr($Fields{'abstract'},0,200).'...';
2413: }
2414: if (length($Fields{'keywords'})>200) {
2415: $Fields{'keywords'} =
2416: substr($Fields{'keywords'},0,200).'...';
2417: }
2418: return %Fields;
2419: }
2420:
2421: ###########################################################
2422: ###########################################################
2423:
2424: =pod
2425:
2426: =item &handle_custom_fields()
2427:
2428: =cut
2429:
2430: ###########################################################
2431: ###########################################################
2432: sub handle_custom_fields {
2433: my @results = @{shift()};
2434: my $customshow='';
2435: my $extrashow='';
2436: my @customfields;
2437: if ($ENV{'form.customshow'}) {
2438: $customshow=$ENV{'form.customshow'};
2439: $customshow=~s/[^\w\s]//g;
2440: my @fields=map {
2441: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2442: } split(/\s+/,$customshow);
2443: @customfields=split(/\s+/,$customshow);
2444: if ($customshow) {
2445: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2446: }
2447: }
2448: my $customdata='';
2449: my %customhash;
2450: foreach my $result (@results) {
2451: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2452: my $tmp=$result;
2453: $tmp=~s/^custom\=//;
2454: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2455: } split(/\,/,$tmp);
2456: $customhash{$k}=$v;
2457: }
2458: }
2459: return ($extrashow,\@customfields,\%customhash);
2460: }
2461:
2462: ######################################################################
2463: ######################################################################
2464:
2465: =pod
2466:
2467: =item &search_results_header
2468:
2469: Output the proper html headers and javascript code to deal with different
2470: calling modes.
2471:
2472: Takes most inputs directly from %ENV, except $mode.
2473:
2474: =over 4
2475:
2476: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2477:
2478: =back
2479:
2480: The following environment variables are checked:
2481:
2482: =over 4
2483:
2484: =item 'form.catalogmode'
2485:
2486: Checked for 'interactive' and 'groupsearch'.
2487:
2488: =item 'form.mode'
2489:
2490: Checked for existance & 'edit' mode.
2491:
2492: =item 'form.form'
2493:
2494: =item 'form.element'
2495:
2496: =back
2497:
2498: =cut
2499:
2500: ######################################################################
2501: ######################################################################
2502: sub search_results_header {
2503: my ($importbutton,$closebutton) = @_;
2504: my $result = '';
2505: # output beginning of search page
2506: # conditional output of script functions dependent on the mode in
2507: # which the search was invoked
2508: if ($ENV{'form.catalogmode'} eq 'interactive'){
2509: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2510: $result.=<<SCRIPT;
2511: <script type="text/javascript">
2512: function select_data(title,url) {
2513: changeTitle(title);
2514: changeURL(url);
2515: parent.close();
2516: }
2517: function changeTitle(val) {
2518: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2519: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2520: }
2521: }
2522: function changeURL(val) {
2523: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2524: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2525: }
2526: }
2527: </script>
2528: SCRIPT
2529: } elsif ($ENV{'form.mode'} eq 'edit') {
2530: my $form = $ENV{'form.form'};
2531: my $element = $ENV{'form.element'};
2532: $result.=<<SCRIPT;
2533: <script type="text/javascript">
2534: function select_data(title,url) {
2535: changeURL(url);
2536: parent.close();
2537: }
2538: function changeTitle(val) {
2539: }
2540: function changeURL(val) {
2541: if (parent.targetwin.document) {
2542: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2543: } else {
2544: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2545: alert("Unable to transfer data to "+url);
2546: }
2547: }
2548: </script>
2549: SCRIPT
2550: }
2551: }
2552: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2553: <script type="text/javascript">
2554: function queue(checkbox_num,val) {
2555: if (document.forms.results.returnvalues[checkbox_num].checked) {
2556: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2557: } else {
2558: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2559: }
2560: }
2561: function select_group() {
2562: parent.window.location=
2563: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2564: parent.statusframe.document.forms.statusform.elements.Queue.value;
2565: }
2566: </script>
2567: SCRIPT
2568: $result.=<<END;
2569: </head>
2570: $bodytag
2571: <form name="results" method="post" action="" >
2572: <input type="hidden" name="Queue" value="" />
2573: $importbutton
2574: END
2575: return $result;
2576: }
2577:
2578: ######################################################################
2579: ######################################################################
2580: sub search_status_header {
2581: return <<ENDSTATUS;
2582: <html><head><title>Search Status</title></head>
2583: $bodytag
2584: <h3>Search Status</h3>
2585: Sending search request to LON-CAPA servers.<br />
2586: ENDSTATUS
2587: }
2588:
2589: sub results_link {
2590: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2591: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2592: my $results_link = $basic_link."&phase=results".
2593: "&pause=1"."&start=1";
2594: return $results_link;
2595: }
2596:
2597: ######################################################################
2598: ######################################################################
2599: sub print_frames_interface {
2600: my $r = shift;
2601: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2602: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2603: my $run_search_link = $basic_link."&phase=run_search";
2604: my $results_link = &results_link();
2605: my $result = <<"ENDFRAMES";
2606: <html>
2607: <head>
2608: <script>
2609: var targetwin = opener;
2610: var queue = '';
2611: </script>
2612: <title>LON-CAPA Digital Library Search Results</title>
2613: </head>
2614: <frameset rows="150,*">
2615: <frame name="statusframe" src="$run_search_link">
2616: <frame name="resultsframe" src="$results_link">
2617: </frameset>
2618: </html>
2619: ENDFRAMES
2620:
2621: $r->print($result);
2622: return;
2623: }
2624:
2625: ######################################################################
2626: ######################################################################
2627:
2628: =pod
2629:
2630: =item Metadata Viewing Functions
2631:
2632: Output is a HTML-ified string.
2633: Input arguments are title, author, subject, url, keywords, version,
2634: notes, short abstract, mime, language, creation date,
2635: last revision date, owner, copyright, hostname, and
2636: extra custom metadata to show.
2637:
2638: =over 4
2639:
2640: =item &detailed_citation_view()
2641:
2642: =cut
2643:
2644: ######################################################################
2645: ######################################################################
2646: sub detailed_citation_view {
2647: my ($prefix,%values) = @_;
2648: my $result=<<END;
2649: <b>$prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2650: target='search_preview'>$values{'title'}</a></b>
2651: <p>
2652: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2653:
2654: <b>Subject: </b> $values{'subject'}<br />
2655: <b>Keyword(s): </b> $values{'keywords'}<br />
2656: <b>Notes: </b> $values{'notes'}<br />
2657: <b>MIME Type: </b> $values{'mimetag'}<br />
2658: <b>Language: </b> $values{'language'}<br />
2659: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
2660: </p>
2661: $values{'extrashow'}
2662: <p>
2663: $values{'shortabstract'}
2664: </p>
2665: <hr align='left' width='200' noshade />
2666: END
2667: return $result;
2668: }
2669:
2670: ######################################################################
2671: ######################################################################
2672:
2673: =pod
2674:
2675: =item &summary_view()
2676:
2677: =cut
2678: ######################################################################
2679: ######################################################################
2680: sub summary_view {
2681: my ($prefix,%values) = @_;
2682: my $result=<<END;
2683: $prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2684: target='search_preview'>$values{'author'}</a><br />
2685: $values{'title'}<br />
2686: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2687: $values{'copyrighttag'}<br />
2688: $values{'extrashow'}
2689: </p>
2690: <hr align='left' width='200' noshade />
2691: END
2692: return $result;
2693: }
2694:
2695: ######################################################################
2696: ######################################################################
2697:
2698: =pod
2699:
2700: =item &compact_view()
2701:
2702: =cut
2703:
2704: ######################################################################
2705: ######################################################################
2706: sub compact_view {
2707: my ($prefix,%values) = @_;
2708: my $result=<<END;
2709: $prefix <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2710: $values{'title'}</a>
2711: <b>$values{'author'}</b><br />
2712: END
2713: return $result;
2714: }
2715:
2716:
2717: ######################################################################
2718: ######################################################################
2719:
2720: =pod
2721:
2722: =item &fielded_format_view()
2723:
2724: =cut
2725:
2726: ######################################################################
2727: ######################################################################
2728: sub fielded_format_view {
2729: my ($prefix,%values) = @_;
2730: my $result=<<END;
2731: $prefix
2732: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2733: target='search_preview'>$values{'url'}</a>
2734: <br />
2735: <b>Title:</b> $values{'title'}<br />
2736: <b>Author(s):</b> $values{'author'}<br />
2737: <b>Subject:</b> $values{'subject'}<br />
2738: <b>Keyword(s):</b> $values{'keywords'}<br />
2739: <b>Notes:</b> $values{'notes'}<br />
2740: <b>MIME Type:</b> $values{'mimetag'}<br />
2741: <b>Language:</b> $values{'language'}<br />
2742: <b>Creation Date:</b> $values{'creationdate'}<br />
2743: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2744: <b>Publisher/Owner:</b> $values{'owner'}<br />
2745: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2746: <b>Repository Location:</b> $values{'hostname'}<br />
2747: <b>Abstract:</b> $values{'shortabstract'}<br />
2748: $values{'extrashow'}
2749: </p>
2750: <hr align='left' width='200' noshade />
2751: END
2752: return $result;
2753: }
2754:
2755: ######################################################################
2756: ######################################################################
2757:
2758: =pod
2759:
2760: =item &xml_sgml_view()
2761:
2762: =back
2763:
2764: =cut
2765:
2766: ######################################################################
2767: ######################################################################
2768: sub xml_sgml_view {
2769: my ($prefix,%values) = @_;
2770: my $result=<<END;
2771: $prefix
2772: <pre>
2773: <LonCapaResource>
2774: <url>$values{'url'}</url>
2775: <title>$values{'title'}</title>
2776: <author>$values{'author'}</author>
2777: <subject>$values{'subject'}</subject>
2778: <keywords>$values{'keywords'}</keywords>
2779: <notes>$values{'notes'}</notes>
2780: <mimeInfo>
2781: <mime>$values{'mime'}</mime>
2782: <mimetag>$values{'mimetag'}</mimetag>
2783: </mimeInfo>
2784: <languageInfo>
2785: <language>$values{'lang'}</language>
2786: <languagetag>$values{'language'}</languagetag>
2787: </languageInfo>
2788: <creationdate>$values{'creationdate'}</creationdate>
2789: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2790: <owner>$values{'owner'}</owner>
2791: <copyrightInfo>
2792: <copyright>$values{'copyright'}</copyright>
2793: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2794: </copyrightInfo>
2795: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2796: <shortabstract>$values{'shortabstract'}</shortabstract>
2797: </LonCapaResource>
2798: </pre>
2799: $values{'extrashow'}
2800: <hr align='left' width='200' noshade />
2801: END
2802: return $result;
2803: }
2804:
2805: ######################################################################
2806: ######################################################################
2807:
2808: =pod
2809:
2810: =item &filled() see if field is filled.
2811:
2812: =cut
2813:
2814: ######################################################################
2815: ######################################################################
2816: sub filled {
2817: my ($field)=@_;
2818: if ($field=~/\S/ && $field ne 'any') {
2819: return 1;
2820: }
2821: else {
2822: return 0;
2823: }
2824: }
2825:
2826: ######################################################################
2827: ######################################################################
2828:
2829: =pod
2830:
2831: =item &output_blank_field_error()
2832:
2833: Output a complete page that indicates the user has not filled in enough
2834: information to do a search.
2835:
2836: Inputs: $r (Apache request handle), $closebutton, $parms.
2837:
2838: Returns: nothing
2839:
2840: $parms is extra information to include in the 'Revise search request' link.
2841:
2842: =cut
2843:
2844: ######################################################################
2845: ######################################################################
2846: sub output_blank_field_error {
2847: my ($r,$closebutton,$parms)=@_;
2848: # make query information persistent to allow for subsequent revision
2849: $r->print(<<BEGINNING);
2850: <html>
2851: <head>
2852: <title>The LearningOnline Network with CAPA</title>
2853: BEGINNING
2854: $r->print(<<RESULTS);
2855: </head>
2856: $bodytag
2857: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2858: <h1>Search Catalog</h1>
2859: <form method="post" action="/adm/searchcat">
2860: $hidden_fields
2861: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2862: >Revise search request</a>
2863: $closebutton
2864: <hr />
2865: <h3>Unactionable search query.</h3>
2866: <p>
2867: You did not fill in enough information for the search to be started.
2868: You need to fill in relevant fields on the search page in order
2869: for a query to be processed.
2870: </p>
2871: </body>
2872: </html>
2873: RESULTS
2874: }
2875:
2876: ######################################################################
2877: ######################################################################
2878:
2879: =pod
2880:
2881: =item &output_date_error()
2882:
2883: Output a full html page with an error message.
2884:
2885: Inputs:
2886:
2887: $r, the request pointer.
2888: $message, the error message for the user.
2889: $closebutton, the specialized close button needed for groupsearch.
2890:
2891: =cut
2892:
2893: ######################################################################
2894: ######################################################################
2895: sub output_date_error {
2896: my ($r,$message,$closebutton)=@_;
2897: # make query information persistent to allow for subsequent revision
2898: $r->print(<<RESULTS);
2899: <html>
2900: <head>
2901: <title>The LearningOnline Network with CAPA</title>
2902: </head>
2903: $bodytag
2904: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2905: <h1>Search Catalog</h1>
2906: <form method="post" action="/adm/searchcat">
2907: $hidden_fields
2908: <input type='button' value='Revise search request'
2909: onClick='this.form.submit();' />
2910: $closebutton
2911: <hr />
2912: <h3>Error</h3>
2913: <p>
2914: $message
2915: </p>
2916: </body>
2917: </html>
2918: RESULTS
2919: }
2920:
2921: ######################################################################
2922: ######################################################################
2923:
2924: =pod
2925:
2926: =item &start_fresh_session()
2927:
2928: Cleans the global %groupsearch_db by removing all fields which begin with
2929: 'pre_' or 'store'.
2930:
2931: =cut
2932:
2933: ######################################################################
2934: ######################################################################
2935: sub start_fresh_session {
2936: delete $groupsearch_db{'mode_catalog'};
2937: foreach (keys %groupsearch_db) {
2938: if ($_ =~ /^pre_/) {
2939: delete $groupsearch_db{$_};
2940: }
2941: if ($_ =~ /^store/) {
2942: delete $groupsearch_db{$_};
2943: }
2944: }
2945: }
2946:
2947: 1;
2948:
2949: __END__
2950:
2951: =pod
2952:
2953: =back
2954:
2955: =cut
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