1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.166 2003/02/10 21:25:43 albertel 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 GDBM_File;
83: use Apache::loncommon();
84: use Apache::lonmysql();
85:
86: # ---------------------------------------- variables used throughout the module
87:
88: ######################################################################
89: ######################################################################
90:
91: =pod
92:
93: =item Global variables
94:
95: =over 4
96:
97: =item $importbutton
98:
99: button to take the select results and go to group sorting
100:
101: =item %groupsearch_db
102:
103: Database hash used to save values for the groupsearch RAT interface.
104:
105: =item $diropendb
106:
107: The full path to the (temporary) search database file. This is set and
108: used in &handler() and is also used in &output_results().
109:
110: =item %Views
111:
112: Hash which associates an output view description with the function
113: that produces it. Adding a new view type should be as easy as
114: adding a line to the definition of this hash and making sure the function
115: takes the proper parameters.
116:
117: =item $bodytag
118:
119: LON-CAPA standard body tag, gotten from &Apache::lonnet::bodytag.
120: No title, no table, just a <body> tag.
121:
122: =back
123:
124: =cut
125:
126: ######################################################################
127: ######################################################################
128:
129: # -- dynamically rendered interface components
130: my $importbutton; # button to take the selected results and go to group sorting
131:
132: # -- miscellaneous variables
133: my %groupsearch_db; # database hash
134: my $diropendb = ""; # db file
135: # View Description Function Pointer
136: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
137: "Summary View" => \&summary_view,
138: "Fielded Format" => \&fielded_format_view,
139: "XML/SGML" => \&xml_sgml_view,
140: "Compact View" => \&compact_view);
141: my %persistent_db;
142: my $hidden_fields;
143: my $bodytag;
144:
145: ######################################################################
146: ######################################################################
147:
148: =pod
149:
150: =item &handler() - main handler invoked by httpd child
151:
152: =item Variables
153:
154: =over 4
155:
156: =item $hidden
157:
158: holds 'hidden' html forms
159:
160: =item $scrout
161:
162: string that holds portions of the screen output
163:
164: =back
165:
166: =cut
167:
168: ######################################################################
169: ######################################################################
170: sub handler {
171: my $r = shift;
172: #
173:
174: my $loaderror=&Apache::lonnet::overloaderror($r);
175: if ($loaderror) { return $loaderror; }
176:
177: my $closebutton; # button that closes the search window
178: # This button is different for the RAT compared to
179: # normal invocation.
180: #
181: $r->content_type('text/html');
182: $r->send_http_header;
183: return OK if $r->header_only;
184: ##
185: ## Prevent caching of the search interface window. Hopefully this means
186: ## we will get the launch=1 passed in a little more.
187: &Apache::loncommon::no_cache($r);
188: ##
189: ## Pick up form fields passed in the links.
190: ##
191: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
192: ['catalogmode','launch','acts','mode','form','element','pause',
193: 'phase','persistent_db_id','table','start','show',
194: 'cleargroupsort']);
195: ##
196: ## The following is a trick - we wait a few seconds if asked to so
197: ## the daemon running the search can get ahead of the daemon
198: ## printing the results. We only need (theoretically) to do
199: ## this once, so the pause indicator is deleted
200: ##
201: if (exists($ENV{'form.pause'})) {
202: sleep(3);
203: delete($ENV{'form.pause'});
204: }
205: ##
206: ## Initialize global variables
207: ##
208: my $domain = $r->dir_config('lonDefDomain');
209: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
210: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
211: #
212: # set the name of the persistent database
213: # $ENV{'form.persistent_db_id'} can only have digits in it.
214: if (! exists($ENV{'form.persistent_db_id'}) ||
215: ($ENV{'form.persistent_db_id'} =~ /\D/) ||
216: ($ENV{'form.launch'} eq '1')) {
217: $ENV{'form.persistent_db_id'} = time;
218: }
219: $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
220: my $persistent_db_file = "/home/httpd/perl/tmp/".
221: &Apache::lonnet::escape($domain).
222: '_'.&Apache::lonnet::escape($ENV{'user.name'}).
223: '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
224: ##
225: if (! &get_persistent_form_data($persistent_db_file)) {
226: if ($ENV{'form.phase'} =~ /(run_search|results)/) {
227: &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
228: "from $persistent_db_file");
229: $r->print(<<END);
230: <html>
231: <head><title>LON-CAPA Search Error</title></head>
232: $bodytag
233: We were unable to retrieve data describing your search. This is a serious
234: error and has been logged. Please alert your LON-CAPA administrator.
235: </body>
236: </html>
237: END
238: return OK;
239: }
240: }
241: ##
242: ## Clear out old values from groupsearch database
243: ##
244: untie %groupsearch_db if (tied(%groupsearch_db));
245: if (($ENV{'form.cleargroupsort'} eq '1') ||
246: (($ENV{'form.launch'} eq '1') &&
247: ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
248: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
249: &start_fresh_session();
250: untie %groupsearch_db;
251: delete($ENV{'form.cleargroupsort'});
252: } else {
253: # This is a stupid error to give to the user.
254: # It really tells them nothing.
255: $r->print('<html><head></head>'.$bodytag.
256: 'Unable to tie hash to db file</body></html>');
257: return OK;
258: }
259: }
260: ##
261: ## Configure hidden fields
262: ##
263: $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
264: $ENV{'form.persistent_db_id'}.'" />'."\n";
265: if (exists($ENV{'form.catalogmode'})) {
266: $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
267: $ENV{'form.catalogmode'}.'" />'."\n";
268: }
269: if (exists($ENV{'form.form'})) {
270: $hidden_fields .= '<input type="hidden" name="form" value="'.
271: $ENV{'form.form'}.'" />'."\n";
272: }
273: if (exists($ENV{'form.element'})) {
274: $hidden_fields .= '<input type="hidden" name="element" value="'.
275: $ENV{'form.element'}.'" />'."\n";
276: }
277: if (exists($ENV{'form.mode'})) {
278: $hidden_fields .= '<input type="hidden" name="mode" value="'.
279: $ENV{'form.mode'}.'" />'."\n";
280: }
281: ##
282: ## Configure dynamic components of interface
283: ##
284: if ($ENV{'form.catalogmode'} eq 'interactive') {
285: $closebutton="<input type='button' name='close' value='CLOSE' ";
286: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
287: $closebutton .="onClick='parent.close()'";
288: } else {
289: $closebutton .="onClick='self.close()'";
290: }
291: $closebutton .=">\n";
292: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
293: $closebutton="<input type='button' name='close' value='CLOSE' ";
294: if ($ENV{'form.phase'} =~ /(results|run_search)/) {
295: $closebutton .="onClick='parent.close()'";
296: } else {
297: $closebutton .="onClick='self.close()'";
298: }
299: $closebutton .= ">";
300: $importbutton=<<END;
301: <input type='button' name='import' value='IMPORT'
302: onClick='javascript:select_group()'>
303: END
304: } else {
305: $closebutton = '';
306: $importbutton = '';
307: }
308: ##
309: ## Sanity checks on form elements
310: ##
311: if (!defined($ENV{'form.viewselect'})) {
312: if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
313: ($ENV{'form.catalogmode'} eq 'interactive')) {
314: $ENV{'form.viewselect'} ="Compact View";
315: } else {
316: $ENV{'form.viewselect'} ="Detailed Citation View";
317: }
318: }
319: $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
320: $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
321: ##
322: ## Switch on the phase
323: ##
324: if ($ENV{'form.phase'} eq 'disp_basic') {
325: &print_basic_search_form($r,$closebutton);
326: } elsif ($ENV{'form.phase'} eq 'disp_adv') {
327: &print_advanced_search_form($r,$closebutton);
328: } elsif ($ENV{'form.phase'} eq 'results') {
329: &display_results($r,$importbutton,$closebutton);
330: } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
331: my ($query,$customquery,$customshow,$libraries,$pretty_string) =
332: &get_persistent_data($persistent_db_file,
333: ['query','customquery','customshow',
334: 'libraries','pretty_string']);
335: if ($ENV{'form.phase'} eq 'sort') {
336: &print_sort_form($r,$pretty_string);
337: } elsif ($ENV{'form.phase'} eq 'run_search') {
338: &run_search($r,$query,$customquery,$customshow,
339: $libraries,$pretty_string);
340: }
341: } elsif(($ENV{'form.phase'} eq 'basic_search') ||
342: ($ENV{'form.phase'} eq 'adv_search')) {
343: $ENV{'form.searchmode'} = 'basic';
344: if ($ENV{'form.phase'} eq 'adv_search') {
345: $ENV{'form.searchmode'} = 'advanced';
346: }
347: # Set up table
348: if (! defined(&create_results_table())) {
349: $r->print(<<END);
350: <html><head><title>Search Error</title></head>
351: $bodytag
352: Unable to create table in which to store search results.
353: The search has been aborted.
354: </body>
355: </html>
356: END
357: return OK;
358: }
359: delete($ENV{'form.launch'});
360: if (! &make_form_data_persistent($r,$persistent_db_file)) {
361: $r->print(<<END);
362: <html><head><title>Search Error</title></head>
363: $bodytag
364: Unable to properly store search information. The search has been aborted.
365: </body>
366: </html>
367: END
368: return OK;
369: }
370: #
371: # We are running a search
372: my ($query,$customquery,$customshow,$libraries) =
373: (undef,undef,undef,undef);
374: my $pretty_string;
375: if ($ENV{'form.phase'} eq 'basic_search') {
376: ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
377: } else { # Advanced search
378: ($query,$customquery,$customshow,$libraries,$pretty_string)
379: = &parse_advanced_search($r,$closebutton);
380: return OK if (! defined($query));
381: }
382: &make_persistent({ query => $query,
383: customquery => $customquery,
384: customshow => $customshow,
385: libraries => $libraries,
386: pretty_string => $pretty_string },
387: $persistent_db_file);
388: ##
389: ## Print out the frames interface
390: ##
391: &print_frames_interface($r);
392: }
393: return OK;
394: }
395:
396: ######################################################################
397: ######################################################################
398:
399: =pod
400:
401: =item &print_basic_search_form()
402:
403: Returns a scalar which holds html for the basic search form.
404:
405: =cut
406:
407: ######################################################################
408: ######################################################################
409:
410: sub print_basic_search_form{
411: my ($r,$closebutton) = @_;
412: my $bodytag=&Apache::loncommon::bodytag('Catalog Search');
413: my $scrout=<<"ENDDOCUMENT";
414: <html>
415: <head>
416: <title>The LearningOnline Network with CAPA</title>
417: <script type="text/javascript">
418: function openhelp(val) {
419: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
420: 'scrollbars=1,width=600,height=300');
421: openhelpwin.focus();
422: }
423: </script>
424: </head>
425: $bodytag
426: <form method="post" action="/adm/searchcat">
427: <input type="hidden" name="phase" value="basic_search" />
428: $hidden_fields
429: <p>
430: Enter terms or phrases separated by AND, OR, or NOT
431: then press SEARCH below.
432: </p>
433: <p>
434: <table>
435: <tr><td>
436: ENDDOCUMENT
437: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
438: ' ';
439: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
440: $scrout.=<<END;
441: </td><td><a
442: href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}"
443: >Advanced Search</a></td></tr>
444: <tr><td>$checkbox use related words</td><td></td></tr>
445: </table>
446: </p>
447: <p>
448: <input type="submit" name="basicsubmit" value='SEARCH' />
449: $closebutton
450: END
451: $scrout.=&selectbox(undef,'viewselect',
452: $ENV{'form.viewselect'},
453: undef,undef,undef,
454: sort(keys(%Views)));
455: $scrout.=&selectbox(undef,'show',
456: $ENV{'form.show'},
457: undef,undef,undef,
458: (10,20,50,100));
459: $scrout.=<<ENDDOCUMENT;
460: per page.
461: </p>
462: </form>
463: </body>
464: </html>
465: ENDDOCUMENT
466: $r->print($scrout);
467: return;
468: }
469: ######################################################################
470: ######################################################################
471:
472: =pod
473:
474: =item &advanced_search_form()
475:
476: Returns a scalar which holds html for the advanced search form.
477:
478: =cut
479:
480: ######################################################################
481: ######################################################################
482:
483: sub print_advanced_search_form{
484: my ($r,$closebutton) = @_;
485: my $advanced_buttons = <<"END";
486: <p>
487: <input type="submit" name="advancedsubmit" value='SEARCH' />
488: <input type="reset" name="reset" value='RESET' />
489: $closebutton
490: <input type="button" value="HELP" onClick="openhelp()" />
491: </p>
492: END
493: if (!defined($ENV{'form.viewselect'})) {
494: $ENV{'form.viewselect'} ="Detailed Citation View";
495: }
496: my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
497: my $scrout=<<"ENDHEADER";
498: <html>
499: <head>
500: <title>The LearningOnline Network with CAPA</title>
501: <script type="text/javascript">
502: function openhelp(val) {
503: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
504: 'scrollbars=1,width=600,height=300');
505: openhelpwin.focus();
506: }
507: </script>
508: </head>
509: $bodytag
510: Enter terms or phrases separated by search operators
511: such as AND, OR, or NOT.<br />
512: <form method="post" action="/adm/searchcat">
513: $advanced_buttons
514: $hidden_fields
515: <input type="hidden" name="phase" value="adv_search" />
516: <table>
517: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
518: <td>
519: ENDHEADER
520: $scrout.=&selectbox(undef,'viewselect',
521: $ENV{'form.viewselect'},
522: undef,undef,undef,
523: sort(keys(%Views)));
524: $scrout.=' ';
525: $scrout.=&selectbox(undef,'show',
526: $ENV{'form.show'},
527: undef,undef,undef,
528: (10,20,50,100));
529: $scrout.=' '.
530: '<font color="#800000" face="helvetica">Per Page</font>';
531: $scrout.="</td><td>Related<br />Words</td></tr>\n";
532: $scrout.=&searchphrasefield_with_related('title', 'title' ,
533: $ENV{'form.title'});
534: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
535: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
536: $ENV{'form.subject'});
537: $scrout.=&searchphrasefield_with_related('keywords','keywords',
538: $ENV{'form.keywords'});
539: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
540: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
541: $ENV{'form.notes'});
542: $scrout.=&searchphrasefield_with_related('abstract','abstract',
543: $ENV{'form.abstract'});
544: # Hack - an empty table row.
545: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
546: $scrout.=&searchphrasefield('file<br />extension','extension',
547: $ENV{'form.extension'});
548: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
549: $scrout.=&searchphrasefield('publisher<br />owner','owner',
550: $ENV{'form.owner'});
551: $scrout.="</table>\n";
552: $ENV{'form.category'}='any' if (! defined($ENV{'form.category'}));
553: $scrout.=&selectbox('File Category','category',
554: $ENV{'form.category'},
555: 'any','Any category',
556: undef,
557: (&Apache::loncommon::filecategories()));
558: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
559: #----------------------------------------------------------------
560: # Allow restriction to multiple domains.
561: # I make the crazy assumption that there will never be a domain 'any'.
562: #
563: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
564: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
565: : ($ENV{'form.domains'}) );
566: my %domain_hash = ();
567: foreach (@allowed_domains) {
568: $domain_hash{$_}++;
569: }
570: my @domains =&Apache::loncommon::get_domains();
571: # adjust the size of the select box
572: my $size = 4;
573: $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
574: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
575: 'DOMAINS</b></font><br />'.
576: '<select name="domains" size="'.$size.'" multiple>'."\n".
577: '<option name="any" value="any" '.
578: ($domain_hash{'any'}? 'selected ' :'').
579: '>all domains</option>'."\n";
580: foreach my $dom (sort @domains) {
581: $scrout.="<option name=\"$dom\" ".
582: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
583: }
584: $scrout.="</select>\n";
585: #----------------------------------------------------------------
586: $scrout.=&selectbox('Limit by language','language',
587: $ENV{'form.language'},'any','Any Language',
588: \&Apache::loncommon::languagedescription,
589: (&Apache::loncommon::languageids),
590: );
591: # ------------------------------------------------ Compute date selection boxes
592: $scrout.=<<CREATIONDATESTART;
593: <p>
594: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
595: </font>
596: <br />
597: between:
598: CREATIONDATESTART
599: $scrout.=&dateboxes('creationdatestart',1,1,1976,
600: $ENV{'form.creationdatestart_month'},
601: $ENV{'form.creationdatestart_day'},
602: $ENV{'form.creationdatestart_year'},
603: );
604: $scrout.="and:\n";
605: $scrout.=&dateboxes('creationdateend',12,31,2051,
606: $ENV{'form.creationdateend_month'},
607: $ENV{'form.creationdateend_day'},
608: $ENV{'form.creationdateend_year'},
609: );
610: $scrout.="</p>";
611: $scrout.=<<LASTREVISIONDATESTART;
612: <p>
613: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
614: </b></font>
615: <br />between:
616: LASTREVISIONDATESTART
617: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
618: $ENV{'form.lastrevisiondatestart_month'},
619: $ENV{'form.lastrevisiondatestart_day'},
620: $ENV{'form.lastrevisiondatestart_year'},
621: );
622: $scrout.=<<LASTREVISIONDATEEND;
623: and:
624: LASTREVISIONDATEEND
625: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
626: $ENV{'form.lastrevisiondateend_month'},
627: $ENV{'form.lastrevisiondateend_day'},
628: $ENV{'form.lastrevisiondateend_year'},
629: );
630: $scrout.='</p>';
631: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
632: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
633: $ENV{'form.copyright'},
634: 'any','Any copyright/distribution',
635: \&Apache::loncommon::copyrightdescription,
636: (&Apache::loncommon::copyrightids),
637: );
638: # ------------------------------------------- Compute customized metadata field
639: # $scrout.=<<CUSTOMMETADATA;
640: #<p>
641: #<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
642: #</font>
643: #For resource-specific metadata, enter in an expression in the form of
644: #<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
645: #<b>Example:</b> grandmother=75 OR grandfather=85
646: #<br />
647: #CUSTOMMETADATA
648: # $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
649: # $scrout.=<<CUSTOMSHOW;
650: #<p>
651: #<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
652: #</font>
653: #Enter in a space-separated list of special metadata fields to show
654: #in a fielded listing for each record result.
655: #<br />
656: #CUSTOMSHOW
657: # $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
658: $scrout.=<<ENDDOCUMENT;
659: $advanced_buttons
660: </form>
661: </body>
662: </html>
663: ENDDOCUMENT
664: $r->print($scrout);
665: return;
666: }
667:
668: ######################################################################
669: ######################################################################
670:
671: =pod
672:
673: =item &get_persistent_form_data
674:
675: Inputs: filename of database
676:
677: Outputs: returns undef on database errors.
678:
679: This function is the reverse of &make_persistent() for form data.
680: Retrieve persistent data from %persistent_db. Retrieved items will have their
681: values unescaped. If a form value already exists in $ENV, it will not be
682: overwritten. Form values that are array references may have values appended
683: to them.
684:
685: =cut
686:
687: ######################################################################
688: ######################################################################
689: sub get_persistent_form_data {
690: my $filename = shift;
691: return 0 if (! -e $filename);
692: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
693: &GDBM_READER(),0640));
694: #
695: # These make sure we do not get array references printed out as 'values'.
696: my %arrays_allowed = ('form.domains'=>1);
697: #
698: # Loop through the keys, looking for 'form.'
699: foreach my $name (keys(%persistent_db)) {
700: next if ($name !~ /^form./);
701: next if (exists($ENV{$name}));
702: my @values = map {
703: &Apache::lonnet::unescape($_);
704: } split(',',$persistent_db{$name});
705: next if (@values <1);
706: if ($arrays_allowed{$name}) {
707: $ENV{$name} = [@values];
708: } else {
709: $ENV{$name} = $values[0] if ($values[0]);
710: }
711: }
712: untie (%persistent_db);
713: return 1;
714: }
715: ######################################################################
716: ######################################################################
717:
718: =pod
719:
720: =item &get_persistent_data
721:
722: Inputs: filename of database, ref to array of values to recover.
723:
724: Outputs: array of values. Returns undef on error.
725:
726: This function is the reverse of &make_persistent();
727: Retrieve persistent data from %persistent_db. Retrieved items will have their
728: values unescaped. If the item contains commas (before unescaping), the
729: returned value will be an array pointer.
730:
731: =cut
732:
733: ######################################################################
734: ######################################################################
735: sub get_persistent_data {
736: my $filename = shift;
737: my @Vars = @{shift()};
738: my @Values; # Return array
739: return undef if (! -e $filename);
740: return undef if (! tie(%persistent_db,'GDBM_File',$filename,
741: &GDBM_READER(),0640));
742: foreach my $name (@Vars) {
743: if (! exists($persistent_db{$name})) {
744: push @Values, undef;
745: next;
746: }
747: my @values = map {
748: &Apache::lonnet::unescape($_);
749: } split(',',$persistent_db{$name});
750: if (@values <= 1) {
751: push @Values,$values[0];
752: } else {
753: push @Values,\@values;
754: }
755: }
756: untie (%persistent_db);
757: return @Values;
758: }
759:
760: ######################################################################
761: ######################################################################
762:
763: =pod
764:
765: =item &make_persistent()
766:
767: Inputs: Hash of values to save, filename of persistent database.
768:
769: Store variables away to the %persistent_db.
770: Values will be escaped. Values that are array pointers will have their
771: elements escaped and concatenated in a comma seperated string.
772:
773: =cut
774:
775: ######################################################################
776: ######################################################################
777: sub make_persistent {
778: my %save = %{shift()};
779: my $filename = shift;
780: return undef if (! tie(%persistent_db,'GDBM_File',
781: $filename,&GDBM_WRCREAT(),0640));
782: foreach my $name (keys(%save)) {
783: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
784: # We handle array references, but not recursively.
785: my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
786: $persistent_db{$name} = $store;
787: }
788: untie(%persistent_db);
789: return 1;
790: }
791:
792: ######################################################################
793: ######################################################################
794:
795: =pod
796:
797: =item &make_form_data_persistent()
798:
799: Inputs: filename of persistent database.
800:
801: Store most form variables away to the %persistent_db.
802: Values will be escaped. Values that are array pointers will have their
803: elements escaped and concatenated in a comma seperated string.
804:
805: =cut
806:
807: ######################################################################
808: ######################################################################
809: sub make_form_data_persistent {
810: my $r = shift;
811: my $filename = shift;
812: my %save;
813: foreach (keys(%ENV)) {
814: next if (!/^form/ || /submit/);
815: $save{$_} = $ENV{$_};
816: }
817: return &make_persistent(\%save,$filename);
818: }
819:
820: ######################################################################
821: # HTML form building functions #
822: ######################################################################
823:
824: =pod
825:
826: =item HTML form building functions
827:
828: =over 4
829:
830: =cut
831:
832: ###############################################
833: ###############################################
834:
835: =pod
836:
837: =item &simpletextfield()
838:
839: Inputs: $name,$value,$size
840:
841: Returns a text input field with the given name, value, and size.
842: If size is not specified, a value of 20 is used.
843:
844: =cut
845:
846: ###############################################
847: ###############################################
848:
849: sub simpletextfield {
850: my ($name,$value,$size)=@_;
851: $size = 20 if (! defined($size));
852: return '<input type="text" name="'.$name.
853: '" size="'.$size.'" value="'.$value.'" />';
854: }
855:
856: ###############################################
857: ###############################################
858:
859: =pod
860:
861: =item &simplecheckbox()
862:
863: Inputs: $name,$value
864:
865: Returns a simple check box with the given $name.
866: If $value eq 'on' the box is checked.
867:
868: =cut
869:
870: ###############################################
871: ###############################################
872:
873: sub simplecheckbox {
874: my ($name,$value)=@_;
875: my $checked='';
876: $checked="checked" if $value eq 'on';
877: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
878: }
879:
880: ###############################################
881: ###############################################
882:
883: =pod
884:
885: =item &fieldtitle()
886:
887: Input: $title
888:
889: Returns a scalar with html which will display $title as a search
890: field heading.
891:
892: =cut
893:
894: ###############################################
895: ###############################################
896:
897: sub fieldtitle {
898: my $title = uc(shift());
899: return '<font color="#800000" face="helvetica"><b>'.$title.
900: ': </b></font>';
901: }
902:
903: ###############################################
904: ###############################################
905:
906: =pod
907:
908: =item &searchphrasefield()
909:
910: Inputs: $title,$name,$value
911:
912: Returns html for a title line and an input field for entering search terms.
913: The entry field (which is where the $name and $value are used) is a 50 column
914: simpletextfield. The html returned is for a row in a three column table.
915:
916: =cut
917:
918: ###############################################
919: ###############################################
920:
921: sub searchphrasefield {
922: my ($title,$name,$value)=@_;
923: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
924: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
925: }
926:
927: ###############################################
928: ###############################################
929:
930: =pod
931:
932: =item &searchphrasefield_with_related()
933:
934: Inputs: $title,$name,$value
935:
936: Returns html for a title line and an input field for entering search terms
937: and a check box for 'related words'. The entry field (which is where the
938: $name and $value are used) is a 50 column simpletextfield. The name of
939: the related words checkbox is "$name_related".
940:
941: =cut
942:
943: ###############################################
944: ###############################################
945:
946: sub searchphrasefield_with_related {
947: my ($title,$name,$value)=@_;
948: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
949: &simpletextfield($name,$value,50).'</td><td align="center"> '.
950: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
951: " </td></tr>\n";
952: }
953:
954: ###############################################
955: ###############################################
956:
957: =pod
958:
959: =item &dateboxes()
960:
961: Returns html selection form elements for the specification of
962: the day, month, and year.
963:
964: =cut
965:
966: ###############################################
967: ###############################################
968:
969: sub dateboxes {
970: my ($name,$defaultmonth,$defaultday,$defaultyear,
971: $currentmonth,$currentday,$currentyear)=@_;
972: ($defaultmonth,$defaultday,$defaultyear)=('','','');
973: #
974: # Day
975: my $day=<<END;
976: <select name="${name}_day">
977: <option value='$defaultday'> </option>
978: END
979: for (my $i = 1; $i<=31; $i++) {
980: $day.="<option value=\"$i\">$i</option>\n";
981: }
982: $day.="</select>\n";
983: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
984: #
985: # Month
986: my $month=<<END;
987: <select name="${name}_month">
988: <option value='$defaultmonth'> </option>
989: END
990: my $i = 1;
991: foreach (qw/January February March April May June
992: July August September October November December /){
993: $month .="<option value=\"$i\">$_</option>\n";
994: $i++;
995: }
996: $month.="</select>\n";
997: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
998: #
999: # Year (obviously)
1000: my $year=<<END;
1001: <select name="${name}_year">
1002: <option value='$defaultyear'> </option>
1003: END
1004: my $maxyear = 2051;
1005: for (my $i = 1976; $i<=$maxyear; $i++) {
1006: $year.="<option value=\"$i\">$i</option>\n";
1007: }
1008: $year.="</select>\n";
1009: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
1010: return "$month$day$year";
1011: }
1012:
1013: ###############################################
1014: ###############################################
1015:
1016: =pod
1017:
1018: =item &selectbox()
1019:
1020: Returns a scalar containing an html <select> form.
1021:
1022: Inputs:
1023:
1024: =over 4
1025:
1026: =item $title
1027:
1028: Printed above the select box, in uppercase. If undefined, only a select
1029: box will be returned, with no additional html.
1030:
1031: =item $name
1032:
1033: The name element of the <select> tag.
1034:
1035: =item $default
1036:
1037: The default value of the form. Can be $anyvalue, or in @idlist.
1038:
1039: =item $anyvalue
1040:
1041: The <option value="..."> used to indicate a default of
1042: none of the values. Can be undef.
1043:
1044: =item $anytag
1045:
1046: The text associate with $anyvalue above.
1047:
1048: =item $functionref
1049:
1050: Each element in @idlist will be passed as a parameter
1051: to the function referenced here. The return value of the function should
1052: be a scalar description of the items. If this value is undefined the
1053: description of each item in @idlist will be the item name.
1054:
1055: =item @idlist
1056:
1057: The items to be selected from. One of these or $anyvalue will be the
1058: value returned by the form element, $ENV{form.$name}.
1059:
1060: =back
1061:
1062: =cut
1063:
1064: ###############################################
1065:
1066: sub selectbox {
1067: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
1068: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
1069: my $selout='';
1070: if (defined($title)) {
1071: my $uctitle=uc($title);
1072: $selout="\n".'<p><font color="#800000" face="helvetica">'.
1073: '<b>'.$uctitle.': </b></font>';
1074: }
1075: $selout .= '<select name="'.$name.'">';
1076: unshift @idlist,$anyvalue if (defined($anyvalue));
1077: foreach (@idlist) {
1078: $selout.='<option value="'.$_.'"';
1079: if ($_ eq $default and !/^any$/) {
1080: $selout.=' selected >'.&{$functionref}($_).'</option>';
1081: }
1082: elsif ($_ eq $default and /^$anyvalue$/) {
1083: $selout.=' selected >'.$anytag.'</option>';
1084: }
1085: else {$selout.='>'.&{$functionref}($_).'</option>';}
1086: }
1087: return $selout.'</select>'.(defined($title)?'</p>':' ');
1088: }
1089:
1090: ######################################################################
1091: # End of HTML form building functions #
1092: ######################################################################
1093:
1094: =pod
1095:
1096: =back
1097:
1098: =cut
1099:
1100:
1101: ######################################################################
1102: ######################################################################
1103:
1104: =pod
1105:
1106: =item &parse_advanced_search()
1107:
1108: Parse advanced search form and return the following:
1109:
1110: =over 4
1111:
1112: =item $query Scalar containing an SQL query.
1113:
1114: =item $customquery Scalar containing a custom query.
1115:
1116: =item $customshow Scalar containing commands to show custom metadata.
1117:
1118: =item $libraries_to_query Reference to array of domains to search.
1119:
1120: =back
1121:
1122: =cut
1123:
1124: ######################################################################
1125: ######################################################################
1126: sub parse_advanced_search {
1127: my ($r,$closebutton)=@_;
1128: my $fillflag=0;
1129: my $pretty_search_string = "<br />\n";
1130: # Clean up fields for safety
1131: for my $field ('title','author','subject','keywords','url','version',
1132: 'creationdatestart_month','creationdatestart_day',
1133: 'creationdatestart_year','creationdateend_month',
1134: 'creationdateend_day','creationdateend_year',
1135: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
1136: 'lastrevisiondatestart_year','lastrevisiondateend_month',
1137: 'lastrevisiondateend_day','lastrevisiondateend_year',
1138: 'notes','abstract','extension','language','owner',
1139: 'custommetadata','customshow','category') {
1140: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1141: }
1142: foreach ('mode','form','element') {
1143: # is this required? Hmmm.
1144: next unless (exists($ENV{"form.$_"}));
1145: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1146: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1147: }
1148: # Preprocess the category form element.
1149: $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
1150: ref($ENV{'form.category'}));
1151: #
1152: # Check to see if enough information was filled in
1153: for my $field ('title','author','subject','keywords','url','version',
1154: 'notes','abstract','category','extension','language',
1155: 'owner','custommetadata') {
1156: if (&filled($ENV{"form.$field"})) {
1157: $fillflag++;
1158: }
1159: }
1160: unless ($fillflag) {
1161: &output_blank_field_error($r,$closebutton,'phase=disp_adv');
1162: return ;
1163: }
1164: # Turn the form input into a SQL-based query
1165: my $query='';
1166: my @queries;
1167: my $font = '<font color="#800000" face="helvetica">';
1168: # Evaluate logical expression AND/OR/NOT phrase fields.
1169: foreach my $field ('title','author','subject','notes','abstract','url',
1170: 'keywords','version','owner') {
1171: if ($ENV{'form.'.$field}) {
1172: my $searchphrase = $ENV{'form.'.$field};
1173: $pretty_search_string .= $font."$field</font> contains <b>".
1174: $searchphrase."</b>";
1175: if ($ENV{'form.'.$field.'_related'}) {
1176: my @New_Words;
1177: ($searchphrase,@New_Words) = &related_version($searchphrase);
1178: if (@New_Words) {
1179: $pretty_search_string .= " with related words: ".
1180: "<b>@New_Words</b>.";
1181: } else {
1182: $pretty_search_string .= " with no related words.";
1183: }
1184: }
1185: $pretty_search_string .= "<br />\n";
1186: push @queries,&build_SQL_query($field,$searchphrase);
1187: }
1188: }
1189: #
1190: # Make the 'mime' from 'form.category' and 'form.extension'
1191: #
1192: my $searchphrase;
1193: if (exists($ENV{'form.category'}) &&
1194: $ENV{'form.category'} !~ /^\s*$/ &&
1195: $ENV{'form.category'} ne 'any') {
1196: my @extensions = &Apache::loncommon::filecategorytypes
1197: ($ENV{'form.category'});
1198: if (scalar(@extensions) > 0) {
1199: $searchphrase = join(' OR ',@extensions);
1200: }
1201: }
1202: if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
1203: $searchphrase .= ' OR ' if (defined($searchphrase));
1204: my @extensions = split(/,/,$ENV{'form.extension'});
1205: $searchphrase .= join(' OR ',@extensions);
1206: }
1207: if (defined($searchphrase)) {
1208: push @queries,&build_SQL_query('mime',$searchphrase);
1209: $pretty_search_string .=$font.'mime</font> contains <b>'.
1210: $searchphrase.'</b><br />';
1211: }
1212: #####
1213: # Evaluate option lists
1214: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
1215: push @queries,"(language like \"$ENV{'form.language'}\")";
1216: $pretty_search_string.=$font."language</font>= ".
1217: &Apache::loncommon::languagedescription($ENV{'form.language'}).
1218: "<br />\n";
1219: }
1220: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
1221: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
1222: $pretty_search_string.=$font."copyright</font> = ".
1223: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
1224: "<br \>\n";
1225: }
1226: #
1227: # Evaluate date windows
1228: my $datequery=&build_date_queries(
1229: $ENV{'form.creationdatestart_month'},
1230: $ENV{'form.creationdatestart_day'},
1231: $ENV{'form.creationdatestart_year'},
1232: $ENV{'form.creationdateend_month'},
1233: $ENV{'form.creationdateend_day'},
1234: $ENV{'form.creationdateend_year'},
1235: $ENV{'form.lastrevisiondatestart_month'},
1236: $ENV{'form.lastrevisiondatestart_day'},
1237: $ENV{'form.lastrevisiondatestart_year'},
1238: $ENV{'form.lastrevisiondateend_month'},
1239: $ENV{'form.lastrevisiondateend_day'},
1240: $ENV{'form.lastrevisiondateend_year'},
1241: );
1242: # Test to see if date windows are legitimate
1243: if ($datequery=~/^Incorrect/) {
1244: &output_date_error($r,$datequery,$closebutton);
1245: return ;
1246: } elsif ($datequery) {
1247: # Here is where you would set up pretty_search_string to output
1248: # date query information.
1249: push @queries,$datequery;
1250: }
1251: # Process form information for custom metadata querying
1252: my $customquery=undef;
1253: # if ($ENV{'form.custommetadata'}) {
1254: # $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1255: # $ENV{'form.custommetadata'}."</b><br />\n";
1256: # $customquery=&build_custommetadata_query('custommetadata',
1257: # $ENV{'form.custommetadata'});
1258: # }
1259: my $customshow=undef;
1260: # if ($ENV{'form.customshow'}) {
1261: # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1262: # $ENV{'form.customshow'}."</b><br />\n";
1263: # $customshow=$ENV{'form.customshow'};
1264: # $customshow=~s/[^\w\s]//g;
1265: # my @fields=split(/\s+/,$customshow);
1266: # $customshow=join(" ",@fields);
1267: # }
1268: ## ---------------------------------------------------------------
1269: ## Deal with restrictions to given domains
1270: ##
1271: my $libraries_to_query = undef;
1272: # $ENV{'form.domains'} can be either a scalar or an array reference.
1273: # We need an array.
1274: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1275: : ($ENV{'form.domains'}) );
1276: my %domain_hash = ();
1277: my $pretty_domains_string;
1278: foreach (@allowed_domains) {
1279: $domain_hash{$_}++;
1280: }
1281: if ($domain_hash{'any'}) {
1282: $pretty_domains_string = "In all LON-CAPA domains.";
1283: } else {
1284: if (@allowed_domains > 1) {
1285: $pretty_domains_string = "In LON-CAPA domains:";
1286: } else {
1287: $pretty_domains_string = "In LON-CAPA domain ";
1288: }
1289: foreach (sort @allowed_domains) {
1290: $pretty_domains_string .= "<b>".$_."</b> ";
1291: }
1292: foreach (keys(%Apache::lonnet::libserv)) {
1293: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1294: push @$libraries_to_query,$_;
1295: }
1296: }
1297: }
1298: $pretty_search_string .= $pretty_domains_string."<br />\n";
1299: #
1300: if (@queries) {
1301: $query=join(" AND ",@queries);
1302: $query="select * from metadata where $query";
1303: } elsif ($customquery) {
1304: $query = '';
1305: }
1306: return ($query,$customquery,$customshow,$libraries_to_query,
1307: $pretty_search_string);
1308: }
1309:
1310: ######################################################################
1311: ######################################################################
1312:
1313: =pod
1314:
1315: =item &parse_basic_search()
1316:
1317: Parse the basic search form and return a scalar containing an sql query.
1318:
1319: =cut
1320:
1321: ######################################################################
1322: ######################################################################
1323: sub parse_basic_search {
1324: my ($r,$closebutton)=@_;
1325: # Clean up fields for safety
1326: for my $field ('basicexp') {
1327: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1328: }
1329: foreach ('mode','form','element') {
1330: # is this required? Hmmm.
1331: next unless (exists($ENV{"form.$_"}));
1332: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1333: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1334: }
1335:
1336: # Check to see if enough is filled in
1337: unless (&filled($ENV{'form.basicexp'})) {
1338: &output_blank_field_error($r,$closebutton,'phase=disp_basic');
1339: return OK;
1340: }
1341: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1342: my $search_string = $ENV{'form.basicexp'};
1343: if ($ENV{'form.related'}) {
1344: my @New_Words;
1345: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1346: if (@New_Words) {
1347: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1348: } else {
1349: $pretty_search_string .= " with no related words.";
1350: }
1351: }
1352: # Build SQL query string based on form page
1353: my $query='';
1354: my $concatarg=join('," ",',
1355: ('title', 'author', 'subject', 'notes', 'abstract',
1356: 'keywords'));
1357: $concatarg='title' if $ENV{'form.titleonly'};
1358: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1359: $pretty_search_string .= "<br />\n";
1360: return 'select * from metadata where '.$query,$pretty_search_string;
1361: }
1362:
1363:
1364: ######################################################################
1365: ######################################################################
1366:
1367: =pod
1368:
1369: =item &related_version
1370:
1371: Modifies an input string to include related words. Words in the string
1372: are replaced with parenthesized lists of 'OR'd words. For example
1373: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1374:
1375: Note: Using this twice on a string is probably silly.
1376:
1377: =cut
1378:
1379: ######################################################################
1380: ######################################################################
1381: sub related_version {
1382: my $search_string = shift;
1383: my $result = $search_string;
1384: my %New_Words = ();
1385: while ($search_string =~ /(\w+)/cg) {
1386: my $word = $1;
1387: next if (lc($word) =~ /\b(or|and|not)\b/);
1388: my @Words = &Apache::loncommon::get_related_words($word);
1389: @Words = ($#Words>4? @Words[0..4] : @Words);
1390: foreach (@Words) { $New_Words{$_}++;}
1391: my $replacement = join " OR ", ($word,@Words);
1392: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1393: }
1394: return $result,sort(keys(%New_Words));
1395: }
1396:
1397: ######################################################################
1398: ######################################################################
1399:
1400: =pod
1401:
1402: =item &build_SQL_query()
1403:
1404: Builds a SQL query string from a logical expression with AND/OR keywords
1405: using Text::Query and &recursive_SQL_query_builder()
1406:
1407: =cut
1408:
1409: ######################################################################
1410: ######################################################################
1411: sub build_SQL_query {
1412: my ($field_name,$logic_statement)=@_;
1413: my $q=new Text::Query('abc',
1414: -parse => 'Text::Query::ParseAdvanced',
1415: -build => 'Text::Query::Build');
1416: $q->prepare($logic_statement);
1417: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1418: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1419: return $sql_query;
1420: }
1421:
1422: ######################################################################
1423: ######################################################################
1424:
1425: =pod
1426:
1427: =item &build_custommetadata_query()
1428:
1429: Constructs a custom metadata query using a rather heinous regular
1430: expression.
1431:
1432: =cut
1433:
1434: ######################################################################
1435: ######################################################################
1436: sub build_custommetadata_query {
1437: my ($field_name,$logic_statement)=@_;
1438: my $q=new Text::Query('abc',
1439: -parse => 'Text::Query::ParseAdvanced',
1440: -build => 'Text::Query::BuildAdvancedString');
1441: $q->prepare($logic_statement);
1442: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1443: # quick fix to change literal into xml tag-matching
1444: # will eventually have to write a separate builder module
1445: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1446: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1447: /\\<$1\\>?# \<wordone\>
1448: \[\^\\<\]?# [^\<]
1449: \*$2\[\^\\<\]?# *wordtwo[^\<]
1450: \*\\<\\\/$1\\>?# *\<\/wordone\>
1451: /g;
1452: return $matchexp;
1453: }
1454:
1455: ######################################################################
1456: ######################################################################
1457:
1458: =pod
1459:
1460: =item &recursive_SQL_query_build()
1461:
1462: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1463:
1464: =cut
1465:
1466: ######################################################################
1467: ######################################################################
1468: sub recursive_SQL_query_build {
1469: my ($dkey,$pattern)=@_;
1470: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1471: return $pattern unless @matches;
1472: foreach my $match (@matches) {
1473: $match=~/\[ (\w+)\s(.*) \]/;
1474: my ($key,$value)=($1,$2);
1475: my $replacement='';
1476: if ($key eq 'literal') {
1477: $replacement="($dkey like \"\%$value\%\")";
1478: }
1479: elsif ($key eq 'not') {
1480: $value=~s/like/not like/;
1481: # $replacement="($dkey not like $value)";
1482: $replacement="$value";
1483: }
1484: elsif ($key eq 'and') {
1485: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1486: $replacement="($1 AND $2)";
1487: }
1488: elsif ($key eq 'or') {
1489: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1490: $replacement="($1 OR $2)";
1491: }
1492: substr($pattern,
1493: index($pattern,$match),
1494: length($match),
1495: $replacement
1496: );
1497: }
1498: &recursive_SQL_query_build($dkey,$pattern);
1499: }
1500:
1501: ######################################################################
1502: ######################################################################
1503:
1504: =pod
1505:
1506: =item &build_date_queries()
1507:
1508: Builds a SQL logic query to check time/date entries.
1509: Also reports errors (check for /^Incorrect/).
1510:
1511: =cut
1512:
1513: ######################################################################
1514: ######################################################################
1515: sub build_date_queries {
1516: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1517: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1518: my @queries;
1519: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1520: unless ($cmonth1 and $cday1 and $cyear1 and
1521: $cmonth2 and $cday2 and $cyear2) {
1522: return "Incorrect entry for the creation date. You must specify ".
1523: "a starting month, day, and year and an ending month, ".
1524: "day, and year.";
1525: }
1526: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1527: $cnumeric1+=0;
1528: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1529: $cnumeric2+=0;
1530: if ($cnumeric1>$cnumeric2) {
1531: return "Incorrect entry for the creation date. The starting ".
1532: "date must occur before the ending date.";
1533: }
1534: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1535: "$cyear2-$cmonth2-$cday2 23:59:59')";
1536: push @queries,$cquery;
1537: }
1538: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1539: unless ($lmonth1 and $lday1 and $lyear1 and
1540: $lmonth2 and $lday2 and $lyear2) {
1541: return "Incorrect entry for the last revision date. You must ".
1542: "specify a starting month, day, and year and an ending ".
1543: "month, day, and year.";
1544: }
1545: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1546: $lnumeric1+=0;
1547: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1548: $lnumeric2+=0;
1549: if ($lnumeric1>$lnumeric2) {
1550: return "Incorrect entry for the last revision date. The ".
1551: "starting date must occur before the ending date.";
1552: }
1553: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1554: "$lyear2-$lmonth2-$lday2 23:59:59')";
1555: push @queries,$lquery;
1556: }
1557: if (@queries) {
1558: return join(" AND ",@queries);
1559: }
1560: return '';
1561: }
1562:
1563: ######################################################################
1564: ######################################################################
1565:
1566: =pod
1567:
1568: =item ©right_check()
1569:
1570: =cut
1571:
1572: ######################################################################
1573: ######################################################################
1574: sub copyright_check {
1575: my $Metadata = shift;
1576: # Check copyright tags and skip results the user cannot use
1577: my (undef,undef,$resdom,$resname) = split('/',
1578: $Metadata->{'url'});
1579: # Check for priv
1580: if (($Metadata->{'copyright'} eq 'priv') &&
1581: (($ENV{'user.name'} ne $resname) &&
1582: ($ENV{'user.domain'} ne $resdom))) {
1583: return 0;
1584: }
1585: # Check for domain
1586: if (($Metadata->{'copyright'} eq 'domain') &&
1587: ($ENV{'user.domain'} ne $resdom)) {
1588: return 0;
1589: }
1590: return 1;
1591: }
1592:
1593:
1594: ######################################################################
1595: ######################################################################
1596:
1597: =pod
1598:
1599: =item &ensure_db_and_table
1600:
1601: Ensure we can get lonmysql to connect to the database and the table we
1602: need exists.
1603:
1604: Inputs: $r, table id
1605:
1606: Returns: undef on error, 1 if the table exists.
1607:
1608: =cut
1609:
1610: ######################################################################
1611: ######################################################################
1612: sub ensure_db_and_table {
1613: my ($r,$table) = @_;
1614: ##
1615: ## Sanity check the table id.
1616: ##
1617: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1618: $r->print("Unable to retrieve search results. ".
1619: "Unable to determine the table results were stored in. ".
1620: "</body></html>");
1621: return undef;
1622: }
1623: ##
1624: ## Make sure we can connect and the table exists.
1625: ##
1626: my $connection_result = &Apache::lonmysql::connect_to_db();
1627: if (!defined($connection_result)) {
1628: $r->print("Unable to connect to the MySQL database where your results".
1629: " are stored. </body></html>");
1630: &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
1631: " connect to database.");
1632: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1633: return undef;
1634: }
1635: my $table_check = &Apache::lonmysql::check_table($table);
1636: if (! defined($table_check)) {
1637: $r->print("A MySQL error has occurred.</form></body></html>");
1638: &Apache::lonnet::logthis("lonmysql was unable to determine the status".
1639: " of table ".$table);
1640: return undef;
1641: } elsif (! $table_check) {
1642: $r->print("The table of results could not be found.");
1643: &Apache::lonnet::logthis("The user requested a table, ".$table.
1644: ", that could not be found.");
1645: return undef;
1646: }
1647: return 1;
1648: }
1649:
1650: ######################################################################
1651: ######################################################################
1652:
1653: =pod
1654:
1655: =item &print_sort_form
1656:
1657: =cut
1658:
1659: ######################################################################
1660: ######################################################################
1661: sub print_sort_form {
1662: my ($r,$pretty_query_string) = @_;
1663: ##
1664: my %SortableFields =
1665: (id => 'Default',
1666: title => 'Title',
1667: author => 'Author',
1668: subject => 'Subject',
1669: url => 'URL',
1670: version => 'Version Number',
1671: mime => 'Mime type',
1672: lang => 'Language',
1673: owner => 'Owner/Publisher',
1674: copyright => 'Copyright',
1675: hostname => 'Host',
1676: creationdate => 'Creation Date',
1677: lastrevisiondate => 'Revision Date',
1678: );
1679: ##
1680: my $table = $ENV{'form.table'};
1681: return if (! &ensure_db_and_table($r,$table));
1682: ##
1683: ## Get the number of results
1684: ##
1685: my $total_results = &Apache::lonmysql::number_of_rows($table);
1686: if (! defined($total_results)) {
1687: $r->print("A MySQL error has occurred.</form></body></html>");
1688: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
1689: " of rows in table ".$table);
1690: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
1691: return;
1692: }
1693: my $result;
1694: $result.=<<END;
1695: <html>
1696: <head>
1697: <script>
1698: function change_sort() {
1699: var newloc = "/adm/searchcat?phase=results";
1700: newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
1701: newloc += "&sortby=";
1702: newloc += document.forms.statusform.elements.sortby.value;
1703: parent.resultsframe.location= newloc;
1704: }
1705: </script>
1706: <title>Results</title>
1707: </head>
1708: $bodytag
1709: <form name="statusform" action="" method="post">
1710: <input type="hidden" name="Queue" value="" />
1711: END
1712:
1713: #<h2>Sort Results</h2>
1714: #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
1715: # $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
1716: # foreach (keys(%SortableFields)) {
1717: # $result.="<option name=\"$_\"";
1718: # if ($_ eq $ENV{'form.sortby'}) {
1719: # $result.=" selected ";
1720: # }
1721: # $result.=" >$SortableFields{$_}</option>\n";
1722: # }
1723: # $result.="</select>\n";
1724: my $revise = &revise_button();
1725: $result.=<<END;
1726: <p>
1727: There are $total_results matches to your query. $revise
1728: </p><p>
1729: Search:$pretty_query_string
1730: </p>
1731: </form>
1732: </body>
1733: </html>
1734: END
1735: $r->print($result);
1736: return;
1737: }
1738:
1739: #####################################################################
1740: #####################################################################
1741:
1742: =pod
1743:
1744: =item MySQL Table Description
1745:
1746: MySQL table creation requires a precise description of the data to be
1747: stored. The use of the correct types to hold data is vital to efficient
1748: storage and quick retrieval of records. The columns must be described in
1749: the following format:
1750:
1751: =cut
1752:
1753: ##
1754: ## Restrictions:
1755: ## columns of type 'text' and 'blob' cannot have defaults.
1756: ## columns of type 'enum' cannot be used for FULLTEXT.
1757: ##
1758: my @DataOrder = qw/id title author subject url keywords version notes
1759: abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
1760:
1761: my %Datatypes =
1762: ( id =>{ type => 'MEDIUMINT',
1763: restrictions => 'UNSIGNED NOT NULL',
1764: primary_key => 'yes',
1765: auto_inc => 'yes'
1766: },
1767: title =>{ type=>'TEXT'},
1768: author =>{ type=>'TEXT'},
1769: subject =>{ type=>'TEXT'},
1770: url =>{ type=>'TEXT',
1771: restrictions => 'NOT NULL' },
1772: keywords =>{ type=>'TEXT'},
1773: version =>{ type=>'TEXT'},
1774: notes =>{ type=>'TEXT'},
1775: abstract =>{ type=>'TEXT'},
1776: mime =>{ type=>'TEXT'},
1777: lang =>{ type=>'TEXT'},
1778: owner =>{ type=>'TEXT'},
1779: copyright =>{ type=>'TEXT'},
1780: hostname =>{ type=>'TEXT'},
1781: #--------------------------------------------------
1782: creationdate =>{ type=>'DATETIME'},
1783: lastrevisiondate =>{ type=>'DATETIME'},
1784: #--------------------------------------------------
1785: );
1786:
1787: my @Fullindicies =
1788: qw/title/;
1789: # qw/title author subject abstract mime language owner copyright/;
1790:
1791: ######################################################################
1792: ######################################################################
1793:
1794: =pod
1795:
1796: =item &create_results_table()
1797:
1798: Creates the table of search results by calling lonmysql. Stores the
1799: table id in $ENV{'form.table'}
1800:
1801: Inputs: none.
1802:
1803: Returns: the identifier of the table on success, undef on error.
1804:
1805: =cut
1806:
1807: ######################################################################
1808: ######################################################################
1809: sub create_results_table {
1810: my $table = &Apache::lonmysql::create_table
1811: ( { columns => \%Datatypes,
1812: column_order => \@DataOrder,
1813: fullindex => \@Fullindicies,
1814: } );
1815: if (defined($table)) {
1816: $ENV{'form.table'} = $table;
1817: return $table;
1818: }
1819: return undef; # Error...
1820: }
1821:
1822: ######################################################################
1823: ######################################################################
1824:
1825: =pod
1826:
1827: =item Search Status update functions
1828:
1829: Each of the following functions changes the values of one of the
1830: input fields used to display the search status to the user. The names
1831: should be explanatory.
1832:
1833: Inputs: Apache request handler ($r), text to display.
1834:
1835: Returns: Nothing.
1836:
1837: =over 4
1838:
1839: =item &update_count_status()
1840:
1841: =item &update_status()
1842:
1843: =item &update_seconds()
1844:
1845: =back
1846:
1847: =cut
1848:
1849: ######################################################################
1850: ######################################################################
1851: sub update_count_status {
1852: my ($r,$text) = @_;
1853: $text =~ s/\'/\\\'/g;
1854: $r->print
1855: ("<script>document.statusform.count.value = ' $text'</script>\n");
1856: $r->rflush();
1857: }
1858:
1859: sub update_status {
1860: my ($r,$text) = @_;
1861: $text =~ s/\'/\\\'/g;
1862: $r->print
1863: ("<script>document.statusform.status.value = ' $text'</script>\n");
1864: $r->rflush();
1865: }
1866:
1867: sub update_seconds {
1868: my ($r,$text) = @_;
1869: $text =~ s/\'/\\\'/g;
1870: $r->print
1871: ("<script>document.statusform.seconds.value = ' $text'</script>\n");
1872: $r->rflush();
1873: }
1874:
1875: ######################################################################
1876: ######################################################################
1877:
1878: =pod
1879:
1880: =item &revise_button
1881:
1882: Inputs: None
1883:
1884: Returns: html string for a 'revise search' button.
1885:
1886: =cut
1887:
1888: ######################################################################
1889: ######################################################################
1890: sub revise_button {
1891: my $revise_phase = 'disp_basic';
1892: $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
1893: my $newloc = '/adm/searchcat'.
1894: '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
1895: '&cleargroupsort=1'.
1896: '&phase='.$revise_phase;
1897: my $result = qq{<input type="button" value="Revise search" name="revise"} .
1898: qq{ onClick="parent.location='$newloc';" /> };
1899: return $result;
1900: }
1901:
1902: ######################################################################
1903: ######################################################################
1904:
1905: =pod
1906:
1907: =item &run_search
1908:
1909: =cut
1910:
1911: ######################################################################
1912: ######################################################################
1913: sub run_search {
1914: my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
1915: my $connection = $r->connection;
1916: #
1917: # Timing variables
1918: #
1919: my $starttime = time;
1920: my $max_time = 30; # seconds for the search to complete
1921: #
1922: # Print run_search header
1923: #
1924: $r->print(<<END);
1925: <html>
1926: <head><title>Search Status</title></head>
1927: $bodytag
1928: <form name="statusform" action="" method="post">
1929: <input type="hidden" name="Queue" value="" />
1930: END
1931: # Check to see if $pretty_string has more than one carriage return.
1932: # Assume \n s are following <br /> s and truncate the value.
1933: # (there is probably a better way)...
1934: my @Lines = split /<br \/>/,$pretty_string;
1935: if (@Lines > 2) {
1936: $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
1937: }
1938: $r->print("Search: ".$pretty_string);
1939: $r->rflush();
1940: #
1941: # Determine the servers we need to contact.
1942: #
1943: my @Servers_to_contact;
1944: if (defined($serverlist)) {
1945: if (ref($serverlist) eq 'ARRAY') {
1946: @Servers_to_contact = @$serverlist;
1947: } else {
1948: @Servers_to_contact = ($serverlist);
1949: }
1950: } else {
1951: @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
1952: }
1953: my %Server_status;
1954: my $table =$ENV{'form.table'};
1955: if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
1956: $r->print("Unable to determine table id to store search results in.".
1957: "The search has been aborted.</body></html>");
1958: return;
1959: }
1960: my $table_status = &Apache::lonmysql::check_table($table);
1961: if (! defined($table_status)) {
1962: $r->print("Unable to determine status of table.</body></html>");
1963: &Apache::lonnet::logthis("Bogus table id of $table for ".
1964: "$ENV{'user.name'} @ $ENV{'user.domain'}");
1965: &Apache::lonnet::logthis("lonmysql error = ".
1966: &Apache::lonmysql::get_error());
1967: return;
1968: }
1969: if (! $table_status) {
1970: $r->print("The table id,$table, we tried to use is invalid.".
1971: "The search has been aborted.</body></html>");
1972: return;
1973: }
1974: ##
1975: ## Prepare for the big loop.
1976: ##
1977: my $hitcountsum;
1978: my $server;
1979: my $status;
1980: my $revise = &revise_button();
1981: $r->print(<<END);
1982: <table>
1983: <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
1984: <tr>
1985: <td><input type="text" name="status" value="" size="30" /></td>
1986: <td><input type="text" name="count" value="" size="10" /></td>
1987: <td><input type="text" name="seconds" value="" size="8" /></td>
1988: <td>$revise</td>
1989: </tr>
1990: </table>
1991: </form>
1992: END
1993: $r->rflush();
1994: my $time_remaining = $max_time - (time - $starttime) ;
1995: my $last_time = $time_remaining;
1996: &update_seconds($r,$time_remaining);
1997: while (($time_remaining > 0) &&
1998: ((@Servers_to_contact) || keys(%Server_status))) {
1999: # Send out a search request if it needs to be done.
2000: if (@Servers_to_contact) {
2001: # Contact one server
2002: my $server = shift(@Servers_to_contact);
2003: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
2004: $customshow,[$server]);
2005: ($server) = keys(%$reply);
2006: $Server_status{$server} = $reply->{$server};
2007: &update_status($r,'contacting '.$server);
2008: } else {
2009: # wait a sec. to give time for files to be written
2010: # This sleep statement is here instead of outside the else
2011: # block because we do not want to pause if we have servers
2012: # left to contact.
2013: sleep(1);
2014: }
2015: #
2016: if (scalar (keys(%Server_status))) {
2017: &update_status($r,'waiting on '.(join(' ',keys(%Server_status))));
2018: }
2019: #
2020: # Loop through the servers we have contacted but do not
2021: # have results from yet, looking for results.
2022: while (my ($server,$status) = each(%Server_status)) {
2023: last if ($connection->aborted());
2024: if ($status eq 'con_lost') {
2025: delete ($Server_status{$server});
2026: next;
2027: }
2028: $status=~/^([\.\w]+)$/;
2029: my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
2030: if (-e $datafile && ! -e "$datafile.end") {
2031: &update_status($r,'Receiving results from '.$server);
2032: next;
2033: }
2034: last if ($connection->aborted());
2035: if (-e "$datafile.end") {
2036: &update_status($r,'Reading results from '.$server);
2037: if (-z "$datafile") {
2038: delete($Server_status{$server});
2039: next;
2040: }
2041: my $fh;
2042: if (!($fh=Apache::File->new($datafile))) {
2043: $r->print("Unable to open search results file for ".
2044: "server $server. Omitting from search");
2045: delete($Server_status{$server});
2046: next;
2047: }
2048: # Read in the whole file.
2049: while (my $result = <$fh>) {
2050: last if ($connection->aborted());
2051: # handle custom fields? Someday we will!
2052: chomp($result);
2053: next unless $result;
2054: # Parse the result.
2055: my %Fields = &parse_raw_result($result,$server);
2056: $Fields{'hostname'} = $server;
2057: next if (! ©right_check(\%Fields));
2058: # Store the result in the mysql database
2059: my $result = &Apache::lonmysql::store_row($table,\%Fields);
2060: if (! defined($result)) {
2061: $r->print(&Apache::lonmysql::get_error());
2062: }
2063: # $r->print(&Apache::lonmysql::get_debug());
2064: $hitcountsum ++;
2065: $time_remaining = $max_time - (time - $starttime) ;
2066: if ($last_time - $time_remaining > 0) {
2067: &update_seconds($r,$time_remaining);
2068: $last_time = $time_remaining;
2069: }
2070: if ($hitcountsum % 50 == 0) {
2071: &update_count_status($r,$hitcountsum);
2072: }
2073: } # End of foreach (@results)
2074: $fh->close();
2075: # $server is only deleted if the results file has been
2076: # found and (successfully) opened. This may be a bad idea.
2077: delete($Server_status{$server});
2078: }
2079: last if ($connection->aborted());
2080: &update_count_status($r,$hitcountsum);
2081: }
2082: last if ($connection->aborted());
2083: # Finished looping through the servers
2084: $starttime = time if (@Servers_to_contact);
2085: $time_remaining = $max_time - (time - $starttime) ;
2086: if ($last_time - $time_remaining > 0) {
2087: $last_time = $time_remaining;
2088: &update_seconds($r,$time_remaining);
2089: }
2090: }
2091: &update_status($r,'Search Complete'.$server);
2092: &update_seconds($r,0);
2093: &Apache::lonmysql::disconnect_from_db();
2094: # We have run out of time or run out of servers to talk to and
2095: # results to get.
2096: $r->print("</body></html>");
2097: if ($ENV{'form.catalogmode'} ne 'groupsearch') {
2098: $r->print("<script>".
2099: "window.location='/adm/searchcat?".
2100: "phase=sort&".
2101: "persistent_db_id=$ENV{'form.persistent_db_id'}';".
2102: "</script>");
2103: }
2104: return;
2105: }
2106:
2107: ######################################################################
2108: ######################################################################
2109: =pod
2110:
2111: =item &prev_next_buttons
2112:
2113: =cut
2114:
2115: ######################################################################
2116: ######################################################################
2117: sub prev_next_buttons {
2118: my ($current_min,$show,$total,$parms) = @_;
2119: return '' if ($show eq 'all'); # No links if you get them all at once.
2120: my $links;
2121: ##
2122: ## Prev
2123: my $prev_min = $current_min - $show;
2124: $prev_min = 1 if $prev_min < 1;
2125: if ($prev_min < $current_min) {
2126: $links .= qq{
2127: <a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
2128: };
2129: } else {
2130: $links .= 'prev';
2131: }
2132: ##
2133: ## Pages.... Someday.
2134: ##
2135: $links .= qq{
2136: <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
2137: };
2138: ##
2139: ## Next
2140: my $next_min = $current_min + $show;
2141: $next_min = $current_min if ($next_min > $total);
2142: if ($next_min != $current_min) {
2143: $links .= qq{
2144: <a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
2145: };
2146: } else {
2147: $links .= ' next';
2148: }
2149: return $links;
2150: }
2151: ######################################################################
2152: ######################################################################
2153:
2154: =pod
2155:
2156: =item &display_results
2157:
2158: =cut
2159:
2160: ######################################################################
2161: ######################################################################
2162: sub display_results {
2163: my ($r,$importbutton,$closebutton) = @_;
2164: my $connection = $r->connection;
2165: $r->print(&search_results_header($importbutton,$closebutton));
2166: ##
2167: ## Set viewing function
2168: ##
2169: my $viewfunction = $Views{$ENV{'form.viewselect'}};
2170: if (!defined($viewfunction)) {
2171: $r->print("Internal Error - Bad view selected.\n");
2172: $r->rflush();
2173: return;
2174: }
2175: ##
2176: ## $checkbox_num is a count of the number of checkboxes output on the
2177: ## page this is used only during catalogmode=groupsearch.
2178: my $checkbox_num = 0;
2179: ##
2180: ## Get the catalog controls setup
2181: ##
2182: my $action = "/adm/searchcat?phase=results";
2183: ##
2184: ## Deal with groupsearch
2185: ##
2186: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
2187: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
2188: &GDBM_WRCREAT(),0640)) {
2189: $r->print('Unable to store import results.</form></body></html>');
2190: $r->rflush();
2191: return;
2192: }
2193: }
2194: ##
2195: ## Prepare the table for querying
2196: ##
2197: my $table = $ENV{'form.table'};
2198: return if (! &ensure_db_and_table($r,$table));
2199: ##
2200: ## Get the number of results
2201: ##
2202: my $total_results = &Apache::lonmysql::number_of_rows($table);
2203: if (! defined($total_results)) {
2204: $r->print("A MySQL error has occurred.</form></body></html>");
2205: &Apache::lonnet::logthis("lonmysql was unable to determine the number".
2206: " of rows in table ".$table);
2207: &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
2208: return;
2209: }
2210: ##
2211: ## Determine how many results we need to get
2212: ##
2213: $ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
2214: $ENV{'form.show'} = 'all' if (! exists($ENV{'form.show'}));
2215: my $min = $ENV{'form.start'};
2216: my $max;
2217: if ($ENV{'form.show'} eq 'all') {
2218: $max = $total_results ;
2219: } else {
2220: $max = $min + $ENV{'form.show'} - 1;
2221: $max = $total_results if ($max > $total_results);
2222: }
2223: ##
2224: ## Output links (if necessary) for 'prev' and 'next' pages.
2225: ##
2226: $r->print
2227: ('<center>'.
2228: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2229: "table=".$ENV{'form.table'}.
2230: "&phase=results".
2231: "&persistent_db_id=".$ENV{'form.persistent_db_id'})
2232: ."</center>\n"
2233: );
2234: if ($total_results == 0) {
2235: $r->print("There are currently no results.\n".
2236: "</form></body></html>");
2237: return;
2238: } else {
2239: $r->print
2240: ("<center>Results $min to $max out of $total_results</center>\n");
2241: }
2242: ##
2243: ## Get results from MySQL table
2244: ##
2245: my @Results = &Apache::lonmysql::get_rows($table,
2246: 'id>='.$min.' AND id<='.$max);
2247: ##
2248: ## Loop through the results and output them.
2249: ##
2250: foreach my $row (@Results) {
2251: if ($connection->aborted()) {
2252: &cleanup();
2253: return;
2254: }
2255: my %Fields = %{&parse_row(@$row)};
2256: my $output="<p>\n";
2257: my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
2258: $Fields{'id'},$checkbox_num++);
2259: # Render the result into html
2260: $output.= &$viewfunction($prefix,%Fields);
2261: # Print them out as they come in.
2262: $r->print($output);
2263: $r->rflush();
2264: }
2265: if (@Results < 1) {
2266: $r->print("There were no results matching your query");
2267: } else {
2268: $r->print
2269: ('<center>'.
2270: &prev_next_buttons($min,$ENV{'form.show'},$total_results,
2271: "table=".$ENV{'form.table'}.
2272: "&phase=results".
2273: "&persistent_db_id=".
2274: $ENV{'form.persistent_db_id'})
2275: ."</center>\n"
2276: );
2277: }
2278: $r->print("</form></body></html>");
2279: $r->rflush();
2280: untie %groupsearch_db if (tied(%groupsearch_db));
2281: return;
2282: }
2283:
2284: ######################################################################
2285: ######################################################################
2286:
2287: =pod
2288:
2289: =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
2290:
2291: Returns html needed for the various catalog modes. Gets inputs from
2292: $ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
2293:
2294: =cut
2295:
2296: ######################################################################
2297: ######################################################################
2298: sub catalogmode_output {
2299: my $output = '';
2300: my ($title,$url,$fnum,$checkbox_num) = @_;
2301: if ($ENV{'form.catalogmode'} eq 'interactive') {
2302: $title=~ s/\'/\\\'/g;
2303: if ($ENV{'form.catalogmode'} eq 'interactive') {
2304: $output.=<<END
2305: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
2306: onClick="javascript:select_data('$title','$url')">
2307: </font>
2308: END
2309: }
2310: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
2311: $groupsearch_db{"pre_${fnum}_link"}=$url;
2312: $groupsearch_db{"pre_${fnum}_title"}=$title;
2313: $output.=<<END;
2314: <font size='-1'>
2315: <input type="checkbox" name="returnvalues" value="SELECT"
2316: onClick="javascript:queue($checkbox_num,$fnum)" />
2317: </font>
2318: END
2319: }
2320: return $output;
2321: }
2322: ######################################################################
2323: ######################################################################
2324:
2325: =pod
2326:
2327: =item &parse_row
2328:
2329: Parse a row returned from the database.
2330:
2331: =cut
2332:
2333: ######################################################################
2334: ######################################################################
2335: sub parse_row {
2336: my @Row = @_;
2337: my %Fields;
2338: for (my $i=0;$i<=$#Row;$i++) {
2339: $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
2340: }
2341: $Fields{'language'} =
2342: &Apache::loncommon::languagedescription($Fields{'lang'});
2343: $Fields{'copyrighttag'} =
2344: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2345: $Fields{'mimetag'} =
2346: &Apache::loncommon::filedescription($Fields{'mime'});
2347: return \%Fields;
2348: }
2349:
2350: ###########################################################
2351: ###########################################################
2352:
2353: =pod
2354:
2355: =item &parse_raw_result()
2356:
2357: Takes a line from the file of results and parse it. Returns a hash
2358: with keys for the following fields:
2359: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
2360: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
2361: 'lastrevisiondate'.
2362:
2363: In addition, the following tags are set by calling the appropriate
2364: lonnet function: 'language', 'cprtag', 'mimetag'.
2365:
2366: The 'title' field is set to "Untitled" if the title field is blank.
2367:
2368: 'abstract' and 'keywords' are truncated to 200 characters.
2369:
2370: =cut
2371:
2372: ###########################################################
2373: ###########################################################
2374: sub parse_raw_result {
2375: my ($result,$hostname) = @_;
2376: # Check for a comma - if it is there then we do not need to unescape the
2377: # string. There seems to be some kind of problem with some items in
2378: # the database - the entire string gets sent out unescaped...?
2379: unless ($result =~ /,/) {
2380: $result = &Apache::lonnet::unescape($result);
2381: }
2382: my @fields=map {
2383: &Apache::lonnet::unescape($_);
2384: } (split(/\,/,$result));
2385: my ($title,$author,$subject,$url,$keywords,$version,
2386: $notes,$abstract,$mime,$lang,
2387: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
2388: my %Fields =
2389: ( title => &Apache::lonnet::unescape($title),
2390: author => &Apache::lonnet::unescape($author),
2391: subject => &Apache::lonnet::unescape($subject),
2392: url => &Apache::lonnet::unescape($url),
2393: keywords => &Apache::lonnet::unescape($keywords),
2394: version => &Apache::lonnet::unescape($version),
2395: notes => &Apache::lonnet::unescape($notes),
2396: abstract => &Apache::lonnet::unescape($abstract),
2397: mime => &Apache::lonnet::unescape($mime),
2398: lang => &Apache::lonnet::unescape($lang),
2399: owner => &Apache::lonnet::unescape($owner),
2400: copyright => &Apache::lonnet::unescape($copyright),
2401: creationdate => &Apache::lonnet::unescape($creationdate),
2402: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
2403: );
2404: $Fields{'language'} =
2405: &Apache::loncommon::languagedescription($Fields{'lang'});
2406: $Fields{'copyrighttag'} =
2407: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
2408: $Fields{'mimetag'} =
2409: &Apache::loncommon::filedescription($Fields{'mime'});
2410: if ($Fields{'author'}=~/^(\s*|error)$/) {
2411: $Fields{'author'}="Unknown Author";
2412: }
2413: # Put spaces in the keyword list, if needed.
2414: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
2415: if ($Fields{'title'}=~ /^\s*$/ ) {
2416: $Fields{'title'}='Untitled';
2417: }
2418: unless ($ENV{'user.adv'}) {
2419: # What is this anyway?
2420: $Fields{'keywords'} = '- not displayed -';
2421: $Fields{'notes'} = '- not displayed -';
2422: $Fields{'abstract'} = '- not displayed -';
2423: $Fields{'subject'} = '- not displayed -';
2424: }
2425: if (length($Fields{'abstract'})>200) {
2426: $Fields{'abstract'} =
2427: substr($Fields{'abstract'},0,200).'...';
2428: }
2429: if (length($Fields{'keywords'})>200) {
2430: $Fields{'keywords'} =
2431: substr($Fields{'keywords'},0,200).'...';
2432: }
2433: return %Fields;
2434: }
2435:
2436: ###########################################################
2437: ###########################################################
2438:
2439: =pod
2440:
2441: =item &handle_custom_fields()
2442:
2443: =cut
2444:
2445: ###########################################################
2446: ###########################################################
2447: sub handle_custom_fields {
2448: my @results = @{shift()};
2449: my $customshow='';
2450: my $extrashow='';
2451: my @customfields;
2452: if ($ENV{'form.customshow'}) {
2453: $customshow=$ENV{'form.customshow'};
2454: $customshow=~s/[^\w\s]//g;
2455: my @fields=map {
2456: "<font color=\"#008000\">$_:</font><!-- $_ -->";
2457: } split(/\s+/,$customshow);
2458: @customfields=split(/\s+/,$customshow);
2459: if ($customshow) {
2460: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
2461: }
2462: }
2463: my $customdata='';
2464: my %customhash;
2465: foreach my $result (@results) {
2466: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
2467: my $tmp=$result;
2468: $tmp=~s/^custom\=//;
2469: my ($k,$v)=map {&Apache::lonnet::unescape($_);
2470: } split(/\,/,$tmp);
2471: $customhash{$k}=$v;
2472: }
2473: }
2474: return ($extrashow,\@customfields,\%customhash);
2475: }
2476:
2477: ######################################################################
2478: ######################################################################
2479:
2480: =pod
2481:
2482: =item &search_results_header
2483:
2484: Output the proper html headers and javascript code to deal with different
2485: calling modes.
2486:
2487: Takes most inputs directly from %ENV, except $mode.
2488:
2489: =over 4
2490:
2491: =item $mode is either (at this writing) 'Basic' or 'Advanced'
2492:
2493: =back
2494:
2495: The following environment variables are checked:
2496:
2497: =over 4
2498:
2499: =item 'form.catalogmode'
2500:
2501: Checked for 'interactive' and 'groupsearch'.
2502:
2503: =item 'form.mode'
2504:
2505: Checked for existance & 'edit' mode.
2506:
2507: =item 'form.form'
2508:
2509: =item 'form.element'
2510:
2511: =back
2512:
2513: =cut
2514:
2515: ######################################################################
2516: ######################################################################
2517: sub search_results_header {
2518: my ($importbutton,$closebutton) = @_;
2519: my $result = '';
2520: # output beginning of search page
2521: # conditional output of script functions dependent on the mode in
2522: # which the search was invoked
2523: if ($ENV{'form.catalogmode'} eq 'interactive'){
2524: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
2525: $result.=<<SCRIPT;
2526: <script type="text/javascript">
2527: function select_data(title,url) {
2528: changeTitle(title);
2529: changeURL(url);
2530: parent.close();
2531: }
2532: function changeTitle(val) {
2533: if (parent.opener.inf.document.forms.resinfo.elements.t) {
2534: parent.opener.inf.document.forms.resinfo.elements.t.value=val;
2535: }
2536: }
2537: function changeURL(val) {
2538: if (parent.opener.inf.document.forms.resinfo.elements.u) {
2539: parent.opener.inf.document.forms.resinfo.elements.u.value=val;
2540: }
2541: }
2542: </script>
2543: SCRIPT
2544: } elsif ($ENV{'form.mode'} eq 'edit') {
2545: my $form = $ENV{'form.form'};
2546: my $element = $ENV{'form.element'};
2547: $result.=<<SCRIPT;
2548: <script type="text/javascript">
2549: function select_data(title,url) {
2550: changeURL(url);
2551: parent.close();
2552: }
2553: function changeTitle(val) {
2554: }
2555: function changeURL(val) {
2556: if (parent.targetwin.document) {
2557: parent.targetwin.document.forms["$form"].elements["$element"].value=val;
2558: } else {
2559: var url = 'forms[\"$form\"].elements[\"$element\"].value';
2560: alert("Unable to transfer data to "+url);
2561: }
2562: }
2563: </script>
2564: SCRIPT
2565: }
2566: }
2567: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
2568: <script type="text/javascript">
2569: function queue(checkbox_num,val) {
2570: if (document.forms.results.returnvalues[checkbox_num].checked) {
2571: parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
2572: } else {
2573: parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
2574: }
2575: }
2576: function select_group() {
2577: parent.window.location=
2578: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
2579: parent.statusframe.document.forms.statusform.elements.Queue.value;
2580: }
2581: </script>
2582: SCRIPT
2583: $result.=<<END;
2584: </head>
2585: $bodytag
2586: <form name="results" method="post" action="" >
2587: <input type="hidden" name="Queue" value="" />
2588: $importbutton
2589: END
2590: return $result;
2591: }
2592:
2593: ######################################################################
2594: ######################################################################
2595: sub search_status_header {
2596: return <<ENDSTATUS;
2597: <html><head><title>Search Status</title></head>
2598: $bodytag
2599: <h3>Search Status</h3>
2600: Sending search request to LON-CAPA servers.<br />
2601: ENDSTATUS
2602: }
2603:
2604: sub results_link {
2605: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2606: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2607: my $results_link = $basic_link."&phase=results".
2608: "&pause=1"."&start=1";
2609: return $results_link;
2610: }
2611:
2612: ######################################################################
2613: ######################################################################
2614: sub print_frames_interface {
2615: my $r = shift;
2616: my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
2617: "&persistent_db_id=".$ENV{'form.persistent_db_id'};
2618: my $run_search_link = $basic_link."&phase=run_search";
2619: my $results_link = &results_link();
2620: my $result = <<"ENDFRAMES";
2621: <html>
2622: <head>
2623: <script>
2624: var targetwin = opener;
2625: var queue = '';
2626: </script>
2627: <title>LON-CAPA Digital Library Search Results</title>
2628: </head>
2629: <frameset rows="150,*">
2630: <frame name="statusframe" src="$run_search_link">
2631: <frame name="resultsframe" src="$results_link">
2632: </frameset>
2633: </html>
2634: ENDFRAMES
2635:
2636: $r->print($result);
2637: return;
2638: }
2639:
2640: ######################################################################
2641: ######################################################################
2642:
2643: =pod
2644:
2645: =item Metadata Viewing Functions
2646:
2647: Output is a HTML-ified string.
2648: Input arguments are title, author, subject, url, keywords, version,
2649: notes, short abstract, mime, language, creation date,
2650: last revision date, owner, copyright, hostname, and
2651: extra custom metadata to show.
2652:
2653: =over 4
2654:
2655: =item &detailed_citation_view()
2656:
2657: =cut
2658:
2659: ######################################################################
2660: ######################################################################
2661: sub detailed_citation_view {
2662: my ($prefix,%values) = @_;
2663: my $result=<<END;
2664: <b>$prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2665: target='search_preview'>$values{'title'}</a></b>
2666: <p>
2667: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
2668:
2669: <b>Subject: </b> $values{'subject'}<br />
2670: <b>Keyword(s): </b> $values{'keywords'}<br />
2671: <b>Notes: </b> $values{'notes'}<br />
2672: <b>MIME Type: </b> $values{'mimetag'}<br />
2673: <b>Language: </b> $values{'language'}<br />
2674: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
2675: </p>
2676: $values{'extrashow'}
2677: <p>
2678: $values{'shortabstract'}
2679: </p>
2680: <hr align='left' width='200' noshade />
2681: END
2682: return $result;
2683: }
2684:
2685: ######################################################################
2686: ######################################################################
2687:
2688: =pod
2689:
2690: =item &summary_view()
2691:
2692: =cut
2693: ######################################################################
2694: ######################################################################
2695: sub summary_view {
2696: my ($prefix,%values) = @_;
2697: my $result=<<END;
2698: $prefix<a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2699: target='search_preview'>$values{'author'}</a><br />
2700: $values{'title'}<br />
2701: $values{'owner'} -- $values{'lastrevisiondate'}<br />
2702: $values{'copyrighttag'}<br />
2703: $values{'extrashow'}
2704: </p>
2705: <hr align='left' width='200' noshade />
2706: END
2707: return $result;
2708: }
2709:
2710: ######################################################################
2711: ######################################################################
2712:
2713: =pod
2714:
2715: =item &compact_view()
2716:
2717: =cut
2718:
2719: ######################################################################
2720: ######################################################################
2721: sub compact_view {
2722: my ($prefix,%values) = @_;
2723: my $result=<<END;
2724: $prefix <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>
2725: $values{'title'}</a>
2726: <b>$values{'author'}</b><br />
2727: END
2728: return $result;
2729: }
2730:
2731:
2732: ######################################################################
2733: ######################################################################
2734:
2735: =pod
2736:
2737: =item &fielded_format_view()
2738:
2739: =cut
2740:
2741: ######################################################################
2742: ######################################################################
2743: sub fielded_format_view {
2744: my ($prefix,%values) = @_;
2745: my $result=<<END;
2746: $prefix
2747: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
2748: target='search_preview'>$values{'url'}</a>
2749: <br />
2750: <b>Title:</b> $values{'title'}<br />
2751: <b>Author(s):</b> $values{'author'}<br />
2752: <b>Subject:</b> $values{'subject'}<br />
2753: <b>Keyword(s):</b> $values{'keywords'}<br />
2754: <b>Notes:</b> $values{'notes'}<br />
2755: <b>MIME Type:</b> $values{'mimetag'}<br />
2756: <b>Language:</b> $values{'language'}<br />
2757: <b>Creation Date:</b> $values{'creationdate'}<br />
2758: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2759: <b>Publisher/Owner:</b> $values{'owner'}<br />
2760: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2761: <b>Repository Location:</b> $values{'hostname'}<br />
2762: <b>Abstract:</b> $values{'shortabstract'}<br />
2763: $values{'extrashow'}
2764: </p>
2765: <hr align='left' width='200' noshade />
2766: END
2767: return $result;
2768: }
2769:
2770: ######################################################################
2771: ######################################################################
2772:
2773: =pod
2774:
2775: =item &xml_sgml_view()
2776:
2777: =back
2778:
2779: =cut
2780:
2781: ######################################################################
2782: ######################################################################
2783: sub xml_sgml_view {
2784: my ($prefix,%values) = @_;
2785: my $result=<<END;
2786: $prefix
2787: <pre>
2788: <LonCapaResource>
2789: <url>$values{'url'}</url>
2790: <title>$values{'title'}</title>
2791: <author>$values{'author'}</author>
2792: <subject>$values{'subject'}</subject>
2793: <keywords>$values{'keywords'}</keywords>
2794: <notes>$values{'notes'}</notes>
2795: <mimeInfo>
2796: <mime>$values{'mime'}</mime>
2797: <mimetag>$values{'mimetag'}</mimetag>
2798: </mimeInfo>
2799: <languageInfo>
2800: <language>$values{'lang'}</language>
2801: <languagetag>$values{'language'}</languagetag>
2802: </languageInfo>
2803: <creationdate>$values{'creationdate'}</creationdate>
2804: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2805: <owner>$values{'owner'}</owner>
2806: <copyrightInfo>
2807: <copyright>$values{'copyright'}</copyright>
2808: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2809: </copyrightInfo>
2810: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2811: <shortabstract>$values{'shortabstract'}</shortabstract>
2812: </LonCapaResource>
2813: </pre>
2814: $values{'extrashow'}
2815: <hr align='left' width='200' noshade />
2816: END
2817: return $result;
2818: }
2819:
2820: ######################################################################
2821: ######################################################################
2822:
2823: =pod
2824:
2825: =item &filled() see if field is filled.
2826:
2827: =cut
2828:
2829: ######################################################################
2830: ######################################################################
2831: sub filled {
2832: my ($field)=@_;
2833: if ($field=~/\S/ && $field ne 'any') {
2834: return 1;
2835: }
2836: else {
2837: return 0;
2838: }
2839: }
2840:
2841: ######################################################################
2842: ######################################################################
2843:
2844: =pod
2845:
2846: =item &output_blank_field_error()
2847:
2848: Output a complete page that indicates the user has not filled in enough
2849: information to do a search.
2850:
2851: Inputs: $r (Apache request handle), $closebutton, $parms.
2852:
2853: Returns: nothing
2854:
2855: $parms is extra information to include in the 'Revise search request' link.
2856:
2857: =cut
2858:
2859: ######################################################################
2860: ######################################################################
2861: sub output_blank_field_error {
2862: my ($r,$closebutton,$parms)=@_;
2863: # make query information persistent to allow for subsequent revision
2864: $r->print(<<BEGINNING);
2865: <html>
2866: <head>
2867: <title>The LearningOnline Network with CAPA</title>
2868: BEGINNING
2869: $r->print(<<RESULTS);
2870: </head>
2871: $bodytag
2872: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2873: <h1>Search Catalog</h1>
2874: <form method="post" action="/adm/searchcat">
2875: $hidden_fields
2876: <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
2877: >Revise search request</a>
2878: $closebutton
2879: <hr />
2880: <h3>Unactionable search query.</h3>
2881: <p>
2882: You did not fill in enough information for the search to be started.
2883: You need to fill in relevant fields on the search page in order
2884: for a query to be processed.
2885: </p>
2886: </body>
2887: </html>
2888: RESULTS
2889: }
2890:
2891: ######################################################################
2892: ######################################################################
2893:
2894: =pod
2895:
2896: =item &output_date_error()
2897:
2898: Output a full html page with an error message.
2899:
2900: Inputs:
2901:
2902: $r, the request pointer.
2903: $message, the error message for the user.
2904: $closebutton, the specialized close button needed for groupsearch.
2905:
2906: =cut
2907:
2908: ######################################################################
2909: ######################################################################
2910: sub output_date_error {
2911: my ($r,$message,$closebutton)=@_;
2912: # make query information persistent to allow for subsequent revision
2913: $r->print(<<RESULTS);
2914: <html>
2915: <head>
2916: <title>The LearningOnline Network with CAPA</title>
2917: </head>
2918: $bodytag
2919: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2920: <h1>Search Catalog</h1>
2921: <form method="post" action="/adm/searchcat">
2922: $hidden_fields
2923: <input type='button' value='Revise search request'
2924: onClick='this.form.submit();' />
2925: $closebutton
2926: <hr />
2927: <h3>Error</h3>
2928: <p>
2929: $message
2930: </p>
2931: </body>
2932: </html>
2933: RESULTS
2934: }
2935:
2936: ######################################################################
2937: ######################################################################
2938:
2939: =pod
2940:
2941: =item &start_fresh_session()
2942:
2943: Cleans the global %groupsearch_db by removing all fields which begin with
2944: 'pre_' or 'store'.
2945:
2946: =cut
2947:
2948: ######################################################################
2949: ######################################################################
2950: sub start_fresh_session {
2951: delete $groupsearch_db{'mode_catalog'};
2952: foreach (keys %groupsearch_db) {
2953: if ($_ =~ /^pre_/) {
2954: delete $groupsearch_db{$_};
2955: }
2956: if ($_ =~ /^store/) {
2957: delete $groupsearch_db{$_};
2958: }
2959: }
2960: }
2961:
2962: 1;
2963:
2964: sub cleanup {
2965: if (tied(%groupsearch_db)) {
2966: &Apache::lonnet::logthis('Cleanup searchcat: groupsearch_db');
2967: unless (untie(%groupsearch_db)) {
2968: &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
2969: }
2970: }
2971: &Apache::lonmysql::disconnect_from_db();
2972: }
2973:
2974: __END__
2975:
2976: =pod
2977:
2978: =back
2979:
2980: =cut
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