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lonsearchcat.pm
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Fri Jul 12 21:02:27 2002 UTC (21 years, 10 months ago) by
matthew
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Renamed "%hash" "%groupsearch_db" in an effort to stamp out useless names.
Added &related_version, which does the thesaurus lookup calls.
Added &searchphrasefield_with_related, which is close to &searchphrasefield.
&handler:
Output html header *before* starting to send requests, thus letting the
user know what is slowing us down.
&parse_basic_search and &parse_advanced_search now call &related_version.
&advanced_search_form
Main table of entry values now has three columns instead of two.
Call &searchphrasefield_with_related where appropriate.
Changes to the documentation for the HTML form helper functions.
1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.142 2002/07/12 21:02:27 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # YEAR=2001
29: # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
30: # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
31: # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison
32: # YEAR=2002
33: # 1/17 Scott Harrison
34: # 6/17 Matthew Hall
35: #
36: ###############################################################################
37: ###############################################################################
38:
39: =pod
40:
41: =head1 NAME
42:
43: lonsearchcat - LONCAPA Search Interface
44:
45: =head1 SYNOPSIS
46:
47: Search interface to LON-CAPAs digital library
48:
49: =head1 DESCRIPTION
50:
51: This module enables searching for a distributed browseable catalog.
52:
53: This is part of the LearningOnline Network with CAPA project
54: described at http://www.lon-capa.org.
55:
56: lonsearchcat presents the user with an interface to search the LON-CAPA
57: digital library. lonsearchcat also initiates the execution of a search
58: by sending the search parameters to LON-CAPA servers. The progress of
59: search (on a server basis) is displayed to the user in a seperate window.
60:
61: =head1 Internals
62:
63: =over 4
64:
65: =cut
66:
67: ###############################################################################
68: ###############################################################################
69:
70: ###############################################################################
71: ## ##
72: ## ORGANIZATION OF THIS PERL MODULE ##
73: ## ##
74: ## 1. Modules used by this module ##
75: ## 2. Variables used throughout the module ##
76: ## 3. handler subroutine called via Apache and mod_perl ##
77: ## 4. Other subroutines ##
78: ## ##
79: ###############################################################################
80:
81: package Apache::lonsearchcat;
82:
83: # ------------------------------------------------- modules used by this module
84: use strict;
85: use Apache::Constants qw(:common);
86: use Apache::lonnet();
87: use Apache::File();
88: use CGI qw(:standard);
89: use Text::Query;
90: use GDBM_File;
91: use Apache::loncommon();
92:
93: # ---------------------------------------- variables used throughout the module
94:
95: ######################################################################
96: ######################################################################
97:
98: =pod
99:
100: =item Global variables
101:
102: =over 4
103:
104: =item $closebutton
105:
106: button that closes the search window
107:
108: =item $importbutton
109:
110: button to take the select results and go to group sorting
111:
112: =item %groupsearch_db
113:
114: Database hash used to save values for the groupsearch RAT interface.
115:
116: =item $diropendb
117:
118: The full path to the (temporary) search database file. This is set and
119: used in &handler() and is also used in &output_results().
120:
121: =item %Views
122:
123: Hash which associates an output view description with the function
124: that produces it. Adding a new view type should be as easy as
125: adding a line to the definition of this hash and making sure the function
126: takes the proper parameters.
127:
128: =back
129:
130: =cut
131:
132: ######################################################################
133: ######################################################################
134:
135: # -- dynamically rendered interface components
136: my $closebutton; # button that closes the search window
137: my $importbutton; # button to take the selected results and go to group sorting
138:
139: # -- miscellaneous variables
140: my %groupsearch_db; # database hash
141: my $diropendb = ""; # db file
142:
143: # View Description Function Pointer
144: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
145: "Summary View" => \&summary_view,
146: "Fielded Format" => \&fielded_format_view,
147: "XML/SGML" => \&xml_sgml_view );
148:
149: ######################################################################
150: ######################################################################
151:
152: =pod
153:
154: =item &handler() - main handler invoked by httpd child
155:
156: =item Variables
157:
158: =over 4
159:
160: =item $hidden
161:
162: holds 'hidden' html forms
163:
164: =item $scrout
165:
166: string that holds portions of the screen output
167:
168: =back
169:
170: =cut
171:
172: ######################################################################
173: ######################################################################
174: sub handler {
175: my $r = shift;
176: untie %groupsearch_db;
177:
178: $r->content_type('text/html');
179: $r->send_http_header;
180: return OK if $r->header_only;
181:
182: my $domain = $r->dir_config('lonDefDomain');
183: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
184: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
185:
186: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
187: ['catalogmode','launch','acts','mode','form','element',
188: 'reqinterface']);
189: ##
190: ## Clear out old values from database
191: ##
192: if ($ENV{'form.launch'} eq '1') {
193: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
194: &start_fresh_session();
195: untie %groupsearch_db;
196: } else {
197: $r->print('<html><head></head><body>Unable to tie hash to db '.
198: 'file</body></html>');
199: return OK;
200: }
201: }
202: ##
203: ## Produce some output, so people know it is working
204: ##
205: $r->print("\n");
206: $r->rflush;
207: ##
208: ## Configure dynamic components of interface
209: ##
210: my $hidden; # Holds 'hidden' html forms
211: if ($ENV{'form.catalogmode'} eq 'interactive') {
212: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
213: "\n";
214: $closebutton="<input type='button' name='close' value='CLOSE' ".
215: "onClick='self.close()'>"."\n";
216: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
217: $hidden=<<END;
218: <input type='hidden' name='catalogmode' value='groupsearch'>
219: END
220: $closebutton=<<END;
221: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
222: END
223: $importbutton=<<END;
224: <input type='button' name='import' value='IMPORT'
225: onClick='javascript:select_group()'>
226: END
227: }
228: $hidden .= &make_persistent({ "form.mode" => $ENV{'form.mode'},
229: "form.form" => $ENV{'form.form'},
230: "form.element" => $ENV{'form.element'},
231: "form.date" => 2 });
232: ##
233: ## What are we doing?
234: ##
235: my $searchtype;
236: $searchtype = 'Basic' if ($ENV{'form.basicsubmit'} eq 'SEARCH');
237: $searchtype = 'Advanced' if ($ENV{'form.advancedsubmit'} eq 'SEARCH');
238: if ($searchtype) {
239: # We are running a search
240: my ($query,$customquery,$customshow,$libraries) =
241: (undef,undef,undef,undef);
242: if ($searchtype eq 'Basic') {
243: $query = &parse_basic_search($r);
244: } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
245: ($query,$customquery,$customshow,$libraries)
246: = &parse_advanced_search($r);
247: return OK if (! defined($query));
248: }
249: # Output some information to the user.
250: $r->print(&search_results_header($searchtype));
251: $r->print("Sending search request to LON-CAPA servers.<br />\n");
252: $r->rflush();
253: # Send query statements over the network to be processed by
254: # either the SQL database or a recursive scheme of 'grep'-like
255: # actions (for custom metadata).
256: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
257: $customshow,$libraries);
258: $r->rflush();
259: &output_results($searchtype,$r,$reply,$hidden);
260: } else {
261: #
262: # We need to get information to search on
263: #
264: # Set the default view if it is not already set.
265: if (!defined($ENV{'form.viewselect'})) {
266: $ENV{'form.viewselect'} ="Detailed Citation View";
267: }
268: # Output the advanced interface
269: if ($ENV{'form.reqinterface'} eq 'advanced') {
270: $r->print(&advanced_search_form($closebutton,$hidden));
271: } else {
272: # Output normal search interface
273: $r->print(&basic_search_form($closebutton,$hidden));
274: }
275: }
276: return OK;
277: }
278:
279: ######################################################################
280: ######################################################################
281:
282: =pod
283:
284: =item &basic_search_form()
285:
286: Returns a scalar which holds html for the basic search form.
287:
288: =cut
289:
290: ######################################################################
291: ######################################################################
292:
293: sub basic_search_form{
294: my ($closebutton,$hidden) = @_;
295: my $scrout=<<"ENDDOCUMENT";
296: <html>
297: <head>
298: <title>The LearningOnline Network with CAPA</title>
299: <script type="text/javascript">
300: function openhelp(val) {
301: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
302: 'scrollbars=1,width=600,height=300');
303: openhelpwin.focus();
304: }
305: </script>
306: </head>
307: <body bgcolor="#FFFFFF">
308: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
309: <h1>Search Catalog</h1>
310: <form method="post" action="/adm/searchcat">
311: $hidden
312: <h3>Basic Search</h3>
313: <p>
314: Enter terms or phrases separated by AND, OR, or NOT
315: then press SEARCH below.
316: </p>
317: <p>
318: <table>
319: <tr><td>
320: ENDDOCUMENT
321: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
322: ' ';
323: # $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'});
324: # $scrout.='<font color="#800000">Search historic archives</font>';
325: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
326: $scrout.=<<END;
327: </td><td><a href="/adm/searchcat?reqinterface=advanced">Advanced Search</a></td></tr>
328: <tr><td>$checkbox use related words</td><td></td></tr>
329: </table>
330: </p>
331: <p>
332: <input type="submit" name="basicsubmit" value='SEARCH' />
333: $closebutton
334: END
335: $scrout.=&selectbox(undef,'viewselect',
336: $ENV{'form.viewselect'},
337: undef,undef,undef,
338: sort(keys(%Views)));
339: $scrout.=<<ENDDOCUMENT;
340: <input type="button" value="HELP" onClick="openhelp()" />
341: </p>
342: </form>
343: </body>
344: </html>
345: ENDDOCUMENT
346: return $scrout;
347: }
348: ######################################################################
349: ######################################################################
350:
351: =pod
352:
353: =item &advanced_search_form()
354:
355: Returns a scalar which holds html for the advanced search form.
356:
357: =cut
358:
359: ######################################################################
360: ######################################################################
361:
362: sub advanced_search_form{
363: my ($closebutton,$hidden) = @_;
364: my $advanced_buttons = <<"END";
365: <p>
366: <input type="submit" name="advancedsubmit" value='SEARCH' />
367: <input type="reset" name="reset" value='RESET' />
368: $closebutton
369: <input type="button" value="HELP" onClick="openhelp()" />
370: </p>
371: END
372: if (!defined($ENV{'form.viewselect'})) {
373: $ENV{'form.viewselect'} ="Detailed Citation View";
374: }
375: my $scrout=<<"ENDHEADER";
376: <html>
377: <head>
378: <title>The LearningOnline Network with CAPA</title>
379: <script type="text/javascript">
380: function openhelp(val) {
381: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
382: 'scrollbars=1,width=600,height=300');
383: openhelpwin.focus();
384: }
385: </script>
386: </head>
387: <body bgcolor="#FFFFFF">
388: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
389: <h1>Advanced Catalog Search</h1>
390: <hr />
391: Enter terms or phrases separated by search operators
392: such as AND, OR, or NOT.<br />
393: <form method="post" action="/adm/searchcat">
394: $advanced_buttons
395: $hidden
396: <table>
397: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
398: <td>
399: ENDHEADER
400: $scrout.=&selectbox(undef,'viewselect',
401: $ENV{'form.viewselect'},
402: undef,undef,undef,
403: sort(keys(%Views)));
404: $scrout.="</td><td>Related<br />Words</td></tr>\n";
405: $scrout.=&searchphrasefield_with_related('title', 'title' ,
406: $ENV{'form.title'});
407: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
408: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
409: $ENV{'form.subject'});
410: $scrout.=&searchphrasefield_with_related('keywords','keywords',
411: $ENV{'form.keywords'});
412: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
413: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
414: $ENV{'form.notes'});
415: $scrout.=&searchphrasefield_with_related('abstract','abstract',
416: $ENV{'form.abstract'});
417: # Hack - an empty table row.
418: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
419: $scrout.=&searchphrasefield('file<br />extension','mime',
420: $ENV{'form.mime'});
421: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
422: $scrout.=&searchphrasefield('publisher<br />owner','owner',
423: $ENV{'form.owner'});
424: $scrout.="</table>\n";
425: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
426: $scrout.=&selectbox('File Category','category',
427: $ENV{'form.category'},
428: 'any','Any category',
429: undef,
430: (&Apache::loncommon::filecategories()));
431: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
432: #----------------------------------------------------------------
433: # Allow restriction to multiple domains.
434: # I make the crazy assumption that there will never be a domain 'any'.
435: #
436: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
437: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
438: : ($ENV{'form.domains'}) );
439: my %domain_hash = ();
440: foreach (@allowed_domains) {
441: $domain_hash{$_}++;
442: }
443: my @domains =&Apache::loncommon::get_domains();
444: # adjust the size of the select box
445: my $size = 4;
446: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
447: # standalone machines do not get to choose a domain to search.
448: if ((scalar @domains) == 1) {
449: $scrout .='<input type="hidden" name="domains" value="any" />'."\n";
450: } else {
451: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
452: 'DOMAINS</b></font><br />'.
453: '<select name="domains" size="'.$size.'" multiple>'."\n".
454: '<option name="any" value="any" '.
455: ($domain_hash{'any'}? 'selected ' :'').
456: '>all domains</option>'."\n";
457: foreach my $dom (sort @domains) {
458: $scrout.="<option name=\"$dom\" ".
459: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
460: }
461: $scrout.="</select>\n";
462: }
463: #----------------------------------------------------------------
464: $scrout.=&selectbox('Limit by language','language',
465: $ENV{'form.language'},'any','Any Language',
466: \&{Apache::loncommon::languagedescription},
467: (&Apache::loncommon::languageids),
468: );
469: # ------------------------------------------------ Compute date selection boxes
470: $scrout.=<<CREATIONDATESTART;
471: <p>
472: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
473: </font>
474: <br />
475: between:
476: CREATIONDATESTART
477: $scrout.=&dateboxes('creationdatestart',1,1,1976,
478: $ENV{'form.creationdatestart_month'},
479: $ENV{'form.creationdatestart_day'},
480: $ENV{'form.creationdatestart_year'},
481: );
482: $scrout.="and:\n";
483: $scrout.=&dateboxes('creationdateend',12,31,2051,
484: $ENV{'form.creationdateend_month'},
485: $ENV{'form.creationdateend_day'},
486: $ENV{'form.creationdateend_year'},
487: );
488: $scrout.="</p>";
489: $scrout.=<<LASTREVISIONDATESTART;
490: <p>
491: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
492: </b></font>
493: <br />between:
494: LASTREVISIONDATESTART
495: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
496: $ENV{'form.lastrevisiondatestart_month'},
497: $ENV{'form.lastrevisiondatestart_day'},
498: $ENV{'form.lastrevisiondatestart_year'},
499: );
500: $scrout.=<<LASTREVISIONDATEEND;
501: and:
502: LASTREVISIONDATEEND
503: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
504: $ENV{'form.lastrevisiondateend_month'},
505: $ENV{'form.lastrevisiondateend_day'},
506: $ENV{'form.lastrevisiondateend_year'},
507: );
508: $scrout.='</p>';
509: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
510: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
511: $ENV{'form.copyright'},
512: 'any','Any copyright/distribution',
513: \&{Apache::loncommon::copyrightdescription},
514: (&Apache::loncommon::copyrightids),
515: );
516: # ------------------------------------------- Compute customized metadata field
517: $scrout.=<<CUSTOMMETADATA;
518: <p>
519: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
520: </font>
521: For resource-specific metadata, enter in an expression in the form of
522: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
523: <b>Example:</b> grandmother=75 OR grandfather=85
524: <br />
525: CUSTOMMETADATA
526: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
527: $scrout.=<<CUSTOMSHOW;
528: <p>
529: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
530: </font>
531: Enter in a space-separated list of special metadata fields to show
532: in a fielded listing for each record result.
533: <br />
534: CUSTOMSHOW
535: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
536: $scrout.=<<ENDDOCUMENT;
537: $advanced_buttons
538: </form>
539: </body>
540: </html>
541: ENDDOCUMENT
542: return $scrout;
543: }
544:
545: ######################################################################
546: ######################################################################
547:
548: =pod
549:
550: =item &make_persistent()
551:
552: Returns a scalar which holds the current ENV{'form.*'} values in
553: a 'hidden' html input tag. This allows search interface information
554: to be somewhat persistent.
555:
556: =cut
557:
558: ######################################################################
559: ######################################################################
560:
561: sub make_persistent {
562: my %save = %{shift()};
563: my $persistent='';
564: foreach (keys %save) {
565: if (/^form\./ && !/submit/) {
566: my $name=$_;
567: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
568: $name=~s/^form\.//;
569: foreach (@values) {
570: s/\"/\'/g; # do not mess with html field syntax
571: $persistent.=<<END;
572: <input type="hidden" name="$name" value="$_" />
573: END
574: }
575: }
576: }
577: return $persistent;
578: }
579:
580: ######################################################################
581: # HTML form building functions #
582: ######################################################################
583:
584: =pod
585:
586: =item HTML form building functions
587:
588: =over 4
589:
590: =cut
591:
592: ###############################################
593: ###############################################
594:
595: =pod
596:
597: =item &simpletextfield()
598:
599: Inputs: $name,$value,$size
600:
601: Returns a text input field with the given name, value, and size.
602: If size is not specified, a value of 20 is used.
603:
604: =cut
605:
606: ###############################################
607: ###############################################
608:
609: sub simpletextfield {
610: my ($name,$value,$size)=@_;
611: $size = 20 if (! defined($size));
612: return '<input type="text" name="'.$name.
613: '" size="'.$size.'" value="'.$value.'" />';
614: }
615:
616: ###############################################
617: ###############################################
618:
619: =pod
620:
621: =item &simplecheckbox()
622:
623: Inputs: $name,$value
624:
625: Returns a simple check box with the given $name.
626: If $value eq 'on' the box is checked.
627:
628: =cut
629:
630: ###############################################
631: ###############################################
632:
633: sub simplecheckbox {
634: my ($name,$value)=@_;
635: my $checked='';
636: $checked="checked" if $value eq 'on';
637: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
638: }
639:
640: ###############################################
641: ###############################################
642:
643: =pod
644:
645: =item &fieldtitle()
646:
647: Input: $title
648:
649: Returns a scalar with html which will display $title as a search
650: field heading.
651:
652: =cut
653:
654: ###############################################
655: ###############################################
656:
657: sub fieldtitle {
658: my $title = uc(shift());
659: return '<font color="#800000" face="helvetica"><b>'.$title.
660: ': </b></font>';
661: }
662:
663: ###############################################
664: ###############################################
665:
666: =pod
667:
668: =item &searchphrasefield()
669:
670: Inputs: $title,$name,$value
671:
672: Returns html for a title line and an input field for entering search terms.
673: The entry field (which is where the $name and $value are used) is a 50 column
674: simpletextfield. The html returned is for a row in a three column table.
675:
676: =cut
677:
678: ###############################################
679: ###############################################
680:
681: sub searchphrasefield {
682: my ($title,$name,$value)=@_;
683: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
684: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
685: }
686:
687: ###############################################
688: ###############################################
689:
690: =pod
691:
692: =item &searchphrasefield_with_related()
693:
694: Inputs: $title,$name,$value
695:
696: Returns html for a title line and an input field for entering search terms
697: and a check box for 'related words'. The entry field (which is where the
698: $name and $value are used) is a 50 column simpletextfield. The name of
699: the related words checkbox is "$name_related".
700:
701: =cut
702:
703: ###############################################
704: ###############################################
705:
706: sub searchphrasefield_with_related {
707: my ($title,$name,$value)=@_;
708: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
709: &simpletextfield($name,$value,50).'</td><td align="center"> '.
710: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
711: " </td></tr>\n";
712: }
713:
714: ###############################################
715: ###############################################
716:
717: =pod
718:
719: =item &dateboxes()
720:
721: Returns html selection form elements for the specification of
722: the day, month, and year.
723:
724: =cut
725:
726: ###############################################
727: ###############################################
728:
729: sub dateboxes {
730: my ($name,$defaultmonth,$defaultday,$defaultyear,
731: $currentmonth,$currentday,$currentyear)=@_;
732: ($defaultmonth,$defaultday,$defaultyear)=('','','');
733: #
734: # Day
735: my $day=<<END;
736: <select name="${name}_day">
737: <option value='$defaultday'> </option>
738: END
739: for (my $i = 1; $i<=31; $i++) {
740: $day.="<option value=\"$i\">$i</option>\n";
741: }
742: $day.="</select>\n";
743: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
744: #
745: # Month
746: my $month=<<END;
747: <select name="${name}_month">
748: <option value='$defaultmonth'> </option>
749: END
750: my $i = 1;
751: foreach (qw/January February March April May June
752: July August September October November December /){
753: $month .="<option value=\"$i\">$_</option>\n";
754: $i++;
755: }
756: $month.="</select>\n";
757: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
758: #
759: # Year (obviously)
760: my $year=<<END;
761: <select name="${name}_year">
762: <option value='$defaultyear'> </option>
763: END
764: my $maxyear = 2051;
765: for (my $i = 1976; $i<=$maxyear; $i++) {
766: $year.="<option value=\"$i\">$i</option>\n";
767: }
768: $year.="</select>\n";
769: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
770: return "$month$day$year";
771: }
772:
773: ###############################################
774: ###############################################
775:
776: =pod
777:
778: =item &selectbox()
779:
780: Returns a scalar containing an html <select> form.
781:
782: Inputs:
783:
784: =over 4
785:
786: =item $title
787:
788: Printed above the select box, in uppercase. If undefined, only a select
789: box will be returned, with no additional html.
790:
791: =item $name
792:
793: The name element of the <select> tag.
794:
795: =item $default
796:
797: The default value of the form. Can be $anyvalue, or in @idlist.
798:
799: =item $anyvalue
800:
801: The <option value="..."> used to indicate a default of
802: none of the values. Can be undef.
803:
804: =item $anytag
805:
806: The text associate with $anyvalue above.
807:
808: =item $functionref
809:
810: Each element in @idlist will be passed as a parameter
811: to the function referenced here. The return value of the function should
812: be a scalar description of the items. If this value is undefined the
813: description of each item in @idlist will be the item name.
814:
815: =item @idlist
816:
817: The items to be selected from. One of these or $anyvalue will be the
818: value returned by the form element, $ENV{form.$name}.
819:
820: =back
821:
822: =cut
823:
824: ###############################################
825:
826: sub selectbox {
827: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
828: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
829: my $selout='';
830: if (defined($title)) {
831: my $uctitle=uc($title);
832: $selout="\n".'<p><font color="#800000" face="helvetica">'.
833: '<b>'.$uctitle.': </b></font>';
834: }
835: $selout .= '<select name="'.$name.'">';
836: unshift @idlist,$anyvalue if (defined($anyvalue));
837: foreach (@idlist) {
838: $selout.='<option value="'.$_.'"';
839: if ($_ eq $default and !/^any$/) {
840: $selout.=' selected >'.&{$functionref}($_).'</option>';
841: }
842: elsif ($_ eq $default and /^$anyvalue$/) {
843: $selout.=' selected >'.$anytag.'</option>';
844: }
845: else {$selout.='>'.&{$functionref}($_).'</option>';}
846: }
847: return $selout.'</select>'.(defined($title)?'</p>':' ');
848: }
849:
850: ######################################################################
851: # End of HTML form building functions #
852: ######################################################################
853:
854: =pod
855:
856: =back
857:
858: =cut
859:
860:
861: ######################################################################
862: ######################################################################
863:
864: =pod
865:
866: =item &parse_advanced_search()
867:
868: Parse advanced search form and return the following:
869:
870: =over 4
871:
872: =item $query Scalar containing an SQL query.
873:
874: =item $customquery Scalar containing a custom query.
875:
876: =item $customshow Scalar containing commands to show custom metadata.
877:
878: =item $libraries_to_query Reference to array of domains to search.
879:
880: =back
881:
882: =cut
883:
884: ######################################################################
885: ######################################################################
886: sub parse_advanced_search {
887: my ($r)=@_;
888: my $fillflag=0;
889: # Clean up fields for safety
890: for my $field ('title','author','subject','keywords','url','version',
891: 'creationdatestart_month','creationdatestart_day',
892: 'creationdatestart_year','creationdateend_month',
893: 'creationdateend_day','creationdateend_year',
894: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
895: 'lastrevisiondatestart_year','lastrevisiondateend_month',
896: 'lastrevisiondateend_day','lastrevisiondateend_year',
897: 'notes','abstract','mime','language','owner',
898: 'custommetadata','customshow','category') {
899: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
900: }
901: foreach ('mode','form','element') {
902: # is this required? Hmmm.
903: next unless (exists($ENV{"form.$_"}));
904: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
905: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
906: }
907: # Preprocess the category form element.
908: if ($ENV{'form.category'} ne 'any') {
909: my @extensions = &Apache::loncommon::filecategorytypes
910: ($ENV{'form.category'});
911: $ENV{'form.mime'} = join ' OR ',@extensions;
912: }
913: # Check to see if enough information was filled in
914: for my $field ('title','author','subject','keywords','url','version',
915: 'notes','abstract','mime','language','owner',
916: 'custommetadata') {
917: if (&filled($ENV{"form.$field"})) {
918: $fillflag++;
919: }
920: }
921: unless ($fillflag) {
922: &output_blank_field_error($r);
923: return ;
924: }
925: # Turn the form input into a SQL-based query
926: my $query='';
927: my @queries;
928: # Evaluate logical expression AND/OR/NOT phrase fields.
929: foreach my $field ('title','author','subject','notes','abstract','url',
930: 'keywords','version','owner','mime') {
931: if ($ENV{'form.'.$field}) {
932: my $searchphrase = $ENV{'form.'.$field};
933: if ($ENV{'form.'.$field.'_related'}) {
934: $searchphrase = &related_version($searchphrase);
935: $ENV{'form.'.$field} = $searchphrase;
936: $ENV{'form.'.$field.'_related'} = undef;
937: }
938: push @queries,&build_SQL_query($field,$searchphrase);
939: }
940: }
941: # I dislike the hack below.
942: if ($ENV{'form.category'}) {
943: $ENV{'form.mime'}='';
944: }
945: # Evaluate option lists
946: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
947: push @queries,"(language like \"$ENV{'form.language'}\")";
948: }
949: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
950: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
951: }
952: # Evaluate date windows
953: my $datequery=&build_date_queries(
954: $ENV{'form.creationdatestart_month'},
955: $ENV{'form.creationdatestart_day'},
956: $ENV{'form.creationdatestart_year'},
957: $ENV{'form.creationdateend_month'},
958: $ENV{'form.creationdateend_day'},
959: $ENV{'form.creationdateend_year'},
960: $ENV{'form.lastrevisiondatestart_month'},
961: $ENV{'form.lastrevisiondatestart_day'},
962: $ENV{'form.lastrevisiondatestart_year'},
963: $ENV{'form.lastrevisiondateend_month'},
964: $ENV{'form.lastrevisiondateend_day'},
965: $ENV{'form.lastrevisiondateend_year'},
966: );
967: # Test to see if date windows are legitimate
968: if ($datequery=~/^Incorrect/) {
969: &output_date_error($r,$datequery);
970: return ;
971: }
972: elsif ($datequery) {
973: push @queries,$datequery;
974: }
975: # Process form information for custom metadata querying
976: my $customquery=undef;
977: if ($ENV{'form.custommetadata'}) {
978: $customquery=&build_custommetadata_query('custommetadata',
979: $ENV{'form.custommetadata'});
980: }
981: my $customshow=undef;
982: if ($ENV{'form.customshow'}) {
983: $customshow=$ENV{'form.customshow'};
984: $customshow=~s/[^\w\s]//g;
985: my @fields=split(/\s+/,$customshow);
986: $customshow=join(" ",@fields);
987: }
988: ## ---------------------------------------------------------------
989: ## Deal with restrictions to given domains
990: ##
991: my $libraries_to_query = undef;
992: # $ENV{'form.domains'} can be either a scalar or an array reference.
993: # We need an array.
994: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
995: : ($ENV{'form.domains'}) );
996: my %domain_hash = ();
997: foreach (@allowed_domains) {
998: $domain_hash{$_}++;
999: }
1000: foreach (keys(%Apache::lonnet::libserv)) {
1001: if ($_ eq 'any') {
1002: $libraries_to_query = undef;
1003: last;
1004: }
1005: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1006: push @$libraries_to_query,$_;
1007: }
1008: }
1009: #
1010: if (@queries) {
1011: $query=join(" AND ",@queries);
1012: $query="select * from metadata where $query";
1013: } elsif ($customquery) {
1014: $query = '';
1015: }
1016: return ($query,$customquery,$customshow,$libraries_to_query);
1017: }
1018:
1019: ######################################################################
1020: ######################################################################
1021:
1022: =pod
1023:
1024: =item &parse_basic_search()
1025:
1026: Parse the basic search form and return a scalar containing an sql query.
1027:
1028: =cut
1029:
1030: ######################################################################
1031: ######################################################################
1032: sub parse_basic_search {
1033: my ($r)=@_;
1034: # Clean up fields for safety
1035: for my $field ('basicexp') {
1036: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1037: }
1038: foreach ('mode','form','element') {
1039: # is this required? Hmmm.
1040: next unless (exists($ENV{"form.$_"}));
1041: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1042: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1043: }
1044:
1045: # Check to see if enough is filled in
1046: unless (&filled($ENV{'form.basicexp'})) {
1047: &output_blank_field_error($r);
1048: return OK;
1049: }
1050: my $search_string = $ENV{'form.basicexp'};
1051: if ($ENV{'form.related'}) {
1052: $search_string = &related_version($ENV{'form.basicexp'});
1053: }
1054: # Build SQL query string based on form page
1055: my $query='';
1056: my $concatarg=join('," ",',
1057: ('title', 'author', 'subject', 'notes', 'abstract',
1058: 'keywords'));
1059: $concatarg='title' if $ENV{'form.titleonly'};
1060: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1061: return 'select * from metadata where '.$query;
1062: }
1063:
1064:
1065: ######################################################################
1066: ######################################################################
1067:
1068: =pod
1069:
1070: =item &related_version
1071:
1072: Modifies an input string to include related words. Words in the string
1073: are replaced with parenthesized lists of 'OR'd words. For example
1074: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1075:
1076: Note: Using this twice on a string is probably silly.
1077:
1078: =cut
1079:
1080: ######################################################################
1081: ######################################################################
1082: sub related_version {
1083: my $search_string = shift;
1084: my $result = $search_string;
1085: while ($search_string =~ /(\w+)/cg) {
1086: my $word = $1;
1087: next if (lc($word) =~ /\b(or|and|not)\b/);
1088: my @Words = &Apache::loncommon::get_related_words($word);
1089: my $replacement = join " OR ", ($word,
1090: ($#Words>4? @Words[0..4] : @Words)
1091: );
1092: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1093: }
1094: return $result;
1095: }
1096:
1097: ######################################################################
1098: ######################################################################
1099:
1100: =pod
1101:
1102: =item &build_SQL_query()
1103:
1104: Builds a SQL query string from a logical expression with AND/OR keywords
1105: using Text::Query and &recursive_SQL_query_builder()
1106:
1107: =cut
1108:
1109: ######################################################################
1110: ######################################################################
1111: sub build_SQL_query {
1112: my ($field_name,$logic_statement)=@_;
1113: my $q=new Text::Query('abc',
1114: -parse => 'Text::Query::ParseAdvanced',
1115: -build => 'Text::Query::Build');
1116: $q->prepare($logic_statement);
1117: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1118: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1119: return $sql_query;
1120: }
1121:
1122: ######################################################################
1123: ######################################################################
1124:
1125: =pod
1126:
1127: =item &build_custommetadata_query()
1128:
1129: Constructs a custom metadata query using a rather heinous regular
1130: expression.
1131:
1132: =cut
1133:
1134: ######################################################################
1135: ######################################################################
1136: sub build_custommetadata_query {
1137: my ($field_name,$logic_statement)=@_;
1138: my $q=new Text::Query('abc',
1139: -parse => 'Text::Query::ParseAdvanced',
1140: -build => 'Text::Query::BuildAdvancedString');
1141: $q->prepare($logic_statement);
1142: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1143: # quick fix to change literal into xml tag-matching
1144: # will eventually have to write a separate builder module
1145: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1146: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1147: /\\<$1\\>?# \<wordone\>
1148: \[\^\\<\]?# [^\<]
1149: \*$2\[\^\\<\]?# *wordtwo[^\<]
1150: \*\\<\\\/$1\\>?# *\<\/wordone\>
1151: /g;
1152: return $matchexp;
1153: }
1154:
1155: ######################################################################
1156: ######################################################################
1157:
1158: =pod
1159:
1160: =item &recursive_SQL_query_build()
1161:
1162: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1163:
1164: =cut
1165:
1166: ######################################################################
1167: ######################################################################
1168: sub recursive_SQL_query_build {
1169: my ($dkey,$pattern)=@_;
1170: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1171: return $pattern unless @matches;
1172: foreach my $match (@matches) {
1173: $match=~/\[ (\w+)\s(.*) \]/;
1174: my ($key,$value)=($1,$2);
1175: my $replacement='';
1176: if ($key eq 'literal') {
1177: $replacement="($dkey like \"\%$value\%\")";
1178: }
1179: elsif ($key eq 'not') {
1180: $value=~s/like/not like/;
1181: # $replacement="($dkey not like $value)";
1182: $replacement="$value";
1183: }
1184: elsif ($key eq 'and') {
1185: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1186: $replacement="($1 AND $2)";
1187: }
1188: elsif ($key eq 'or') {
1189: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1190: $replacement="($1 OR $2)";
1191: }
1192: substr($pattern,
1193: index($pattern,$match),
1194: length($match),
1195: $replacement
1196: );
1197: }
1198: &recursive_SQL_query_build($dkey,$pattern);
1199: }
1200:
1201: ######################################################################
1202: ######################################################################
1203:
1204: =pod
1205:
1206: =item &build_date_queries()
1207:
1208: Builds a SQL logic query to check time/date entries.
1209: Also reports errors (check for /^Incorrect/).
1210:
1211: =cut
1212:
1213: ######################################################################
1214: ######################################################################
1215: sub build_date_queries {
1216: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1217: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1218: my @queries;
1219: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1220: unless ($cmonth1 and $cday1 and $cyear1 and
1221: $cmonth2 and $cday2 and $cyear2) {
1222: return "Incorrect entry for the creation date. You must specify ".
1223: "a starting month, day, and year and an ending month, ".
1224: "day, and year.";
1225: }
1226: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1227: $cnumeric1+=0;
1228: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1229: $cnumeric2+=0;
1230: if ($cnumeric1>$cnumeric2) {
1231: return "Incorrect entry for the creation date. The starting ".
1232: "date must occur before the ending date.";
1233: }
1234: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1235: "$cyear2-$cmonth2-$cday2 23:59:59')";
1236: push @queries,$cquery;
1237: }
1238: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1239: unless ($lmonth1 and $lday1 and $lyear1 and
1240: $lmonth2 and $lday2 and $lyear2) {
1241: return "Incorrect entry for the last revision date. You must ".
1242: "specify a starting month, day, and year and an ending ".
1243: "month, day, and year.";
1244: }
1245: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1246: $lnumeric1+=0;
1247: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1248: $lnumeric2+=0;
1249: if ($lnumeric1>$lnumeric2) {
1250: return "Incorrect entry for the last revision date. The ".
1251: "starting date must occur before the ending date.";
1252: }
1253: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1254: "$lyear2-$lmonth2-$lday2 23:59:59')";
1255: push @queries,$lquery;
1256: }
1257: if (@queries) {
1258: return join(" AND ",@queries);
1259: }
1260: return '';
1261: }
1262:
1263: ######################################################################
1264: ######################################################################
1265:
1266: =pod
1267:
1268: =item &output_results()
1269:
1270: Format and output results based on a reply list.
1271: There are two windows that this function writes to. The main search
1272: window ("srch") has a listing of the results. A secondary window ("popwin")
1273: gives the status of the network search (time elapsed, number of machines
1274: contacted, etc.)
1275:
1276: =cut
1277:
1278: ######################################################################
1279: ######################################################################
1280: sub output_results {
1281: # &Apache::lonnet::logthis("output_results:".time);
1282: my $fnum; # search result counter
1283: my ($mode,$r,$replyref,$hidden)=@_;
1284: my %rhash=%{$replyref};
1285: my $compiledresult='';
1286: my $timeremain=300; # (seconds)
1287: my $elapsetime=0;
1288: my $resultflag=0;
1289: my $tflag=1;
1290: ##
1291: ## Set viewing function
1292: ##
1293: my $viewfunction = $Views{$ENV{'form.viewselect'}};
1294: if (!defined($viewfunction)) {
1295: $r->print("Internal Error - Bad view selected.\n");
1296: $r->rflush();
1297: return;
1298: }
1299: #
1300: # make query information persistent to allow for subsequent revision
1301: my $persistent=&make_persistent(\%ENV);
1302: #
1303: # Begin producing output
1304: $r->rflush();
1305: #
1306: # begin showing the cataloged results
1307: my $action = "/adm/searchcat";
1308: if ($mode eq 'Basic') {
1309: $action .= "?reqinterface=basic";
1310: } elsif ($mode eq 'Advanced') {
1311: $action .= "?reqinterface=advanced";
1312: }
1313: $r->print(<<CATALOGCONTROLS);
1314: <form name='results' method="post" action="$action">
1315: $hidden
1316: <input type='hidden' name='acts' value='' />
1317: <input type='button' value='Revise search request'
1318: onClick='this.form.submit();' />
1319: $importbutton
1320: $closebutton
1321: $persistent
1322: <hr />
1323: CATALOGCONTROLS
1324: #
1325: # make the pop-up window for status
1326: $r->print(&make_popwin(%rhash));
1327: $r->rflush();
1328: ##
1329: ## Prepare for the main loop below
1330: ##
1331: my $servercount=0;
1332: my $hitcountsum=0;
1333: my $servernum=(keys %rhash);
1334: my $serversleft=$servernum;
1335: ##
1336: ## Run until we run out of time or we run out of servers
1337: ##
1338: while($serversleft && $timeremain) {
1339: ##
1340: ## %rhash has servers deleted from it as results come in
1341: ## (within the foreach loop below).
1342: ##
1343: foreach my $rkey (sort keys %rhash) {
1344: # &Apache::lonnet::logthis("Server $rkey:".time);
1345: $servercount++;
1346: $compiledresult='';
1347: my $reply=$rhash{$rkey};
1348: my @results;
1349: if ($reply eq 'con_lost') {
1350: &popwin_imgupdate($r,$rkey,"srvbad.gif");
1351: $serversleft--;
1352: delete $rhash{$rkey};
1353: } else {
1354: # must do since 'use strict' checks for tainting
1355: $reply=~/^([\.\w]+)$/;
1356: my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1357: $reply=~/(.*?)\_/;
1358: for (my $counter=0;$counter<2;$counter++) {
1359: if (-e $replyfile && ! -e "$replyfile.end") {
1360: &popwin_imgupdate($r,$rkey,"srvhalf.gif");
1361: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1362: '"still transferring..."'.';');
1363: }
1364: # Are we finished transferring data?
1365: if (-e "$replyfile.end") {
1366: $serversleft--;
1367: delete $rhash{$rkey};
1368: if (-s $replyfile) {
1369: &popwin_imgupdate($r,$rkey,"srvgood.gif");
1370: my $fh;
1371: unless ($fh=Apache::File->new($replyfile)){
1372: # Is it really appropriate to die on this error?
1373: $r->print('ERROR: file '.
1374: $replyfile.' cannot be opened');
1375: return OK;
1376: }
1377: @results=<$fh> if $fh;
1378: my $hits =@results;
1379: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1380: $hits.';');
1381: $hitcountsum+=$hits;
1382: &popwin_js($r,'popwin.document.forms.popremain.'.
1383: 'numhits.value='.$hitcountsum.';');
1384: } else {
1385: &popwin_imgupdate($r,$rkey,"srvempty.gif");
1386: &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
1387: }
1388: last;
1389: } # end of if ( -e "$replyfile.end")
1390: last unless $timeremain;
1391: sleep 1; # wait for daemons to write files?
1392: $timeremain--;
1393: $elapsetime++;
1394: &popwin_js($r,"popwin.document.popremain.".
1395: "elapsetime.value=$elapsetime;");
1396: }
1397: &popwin_js($r,'popwin.document.whirly.'.
1398: 'src="/adm/lonIcons/lonanimend.gif";');
1399: } # end of if ($reply eq 'con_lost') else statement
1400: my %Fields = undef; # Holds the data to be sent to the various
1401: # *_view routines.
1402: my ($extrashow,$customfields,$customhash) =
1403: &handle_custom_fields(\@results);
1404: my @customfields = @$customfields;
1405: my %customhash = %$customhash;
1406: untie %groupsearch_db if (tied %groupsearch_db);
1407: #
1408: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1409: $r->print('<html><head></head><body>Unable to tie hash to db '.
1410: 'file</body></html>');
1411: } else {
1412: if ($ENV{'form.launch'} eq '1') {
1413: &start_fresh_session();
1414: }
1415: foreach my $result (@results) {
1416: next if $result=~/^custom\=/;
1417: chomp $result;
1418: next unless $result;
1419: %Fields = &parse_raw_result($result,$rkey);
1420: #
1421: # Check copyright tags and skip results the user cannot use
1422: my (undef,undef,$resdom,$resname) = split('/',$Fields{'url'});
1423: # Check for priv
1424: if (($Fields{'copyright'} eq 'priv') &&
1425: (($ENV{'user.name'} ne $resname) &&
1426: ($ENV{'user.domain'} ne $resdom))) {
1427: next;
1428: }
1429: # Check for domain
1430: if (($Fields{'copyright'} eq 'domain') &&
1431: ($ENV{'user.domain'} ne $resdom)) {
1432: next;
1433: }
1434: #
1435: $Fields{'extrashow'}=$extrashow;
1436: if ($extrashow) {
1437: foreach my $field (@customfields) {
1438: my $value='';
1439: $value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s);
1440: $Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g;
1441: }
1442: }
1443: $compiledresult.="\n<p>\n";
1444: if ($ENV{'form.catalogmode'} eq 'interactive') {
1445: my $titleesc=$Fields{'title'};
1446: $titleesc=~s/\'/\\'/; # '
1447: $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');
1448: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1449: onClick="javascript:select_data('$titleesc','$Fields{'url'}')">
1450: </font>
1451: <br />
1452: END
1453: }
1454: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1455: $fnum+=0;
1456: $groupsearch_db{"pre_${fnum}_link"}=$Fields{'url'};
1457: $groupsearch_db{"pre_${fnum}_title"}=$Fields{'title'};
1458: $compiledresult.=<<END;
1459: <font size='-1'>
1460: <input type="checkbox" name="returnvalues" value="SELECT"
1461: onClick="javascript:queue($fnum)" />
1462: </font>
1463: <br />
1464: END
1465: # <input type="hidden" name="title$fnum" value="$title" />
1466: # <input type="hidden" name="url$fnum" value="$url" />
1467: $fnum++;
1468: }
1469: # Render the result into html
1470: $compiledresult.= &$viewfunction(%Fields, hostname => $rkey );
1471: if ($compiledresult or $servercount!=$servernum) {
1472: $compiledresult.="<hr align='left' width='200' noshade />";
1473: }
1474: }
1475: untie %groupsearch_db;
1476: }
1477: if ($compiledresult) {
1478: $resultflag=1;
1479: $r->print($compiledresult);
1480: }
1481: } # End of foreach loop over servers remaining
1482: } # End of big loop - while($serversleft && $timeremain)
1483: unless ($resultflag) {
1484: $r->print("\nThere were no results that matched your query\n");
1485: }
1486: $r->print('<script type="text/javascript">'.'popwin.close()</script>'.
1487: "\n");
1488: $r->print("</body>\n</html>\n");
1489: $r->rflush();
1490: return;
1491: }
1492:
1493: ###########################################################
1494: ###########################################################
1495:
1496: =pod
1497:
1498: =item &parse_raw_result()
1499:
1500: Takes a line from the file of results and parse it. Returns a hash
1501: with keys for the following fields:
1502: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
1503: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
1504: 'lastrevisiondate'.
1505:
1506: In addition, the following tags are set by calling the appropriate
1507: lonnet function: 'language', 'cprtag', 'mimetag'.
1508:
1509: The 'title' field is set to "Untitled" if the title field is blank.
1510:
1511: 'abstract' and 'keywords' are truncated to 200 characters.
1512:
1513: =cut
1514:
1515: ###########################################################
1516: ###########################################################
1517: sub parse_raw_result {
1518: my ($result,$hostname) = @_;
1519: # Check for a comma - if it is there then we do not need to unescape the
1520: # string. There seems to be some kind of problem with some items in
1521: # the database - the entire string gets sent out unescaped...?
1522: unless ($result =~ /,/) {
1523: $result = &Apache::lonnet::unescape($result);
1524: }
1525: my @fields=map {
1526: &Apache::lonnet::unescape($_);
1527: } (split(/\,/,$result));
1528: my ($title,$author,$subject,$url,$keywords,$version,
1529: $notes,$abstract,$mime,$lang,
1530: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1531: my %Fields =
1532: ( title => &Apache::lonnet::unescape($title),
1533: author => &Apache::lonnet::unescape($author),
1534: subject => &Apache::lonnet::unescape($subject),
1535: url => &Apache::lonnet::unescape($url),
1536: keywords => &Apache::lonnet::unescape($keywords),
1537: version => &Apache::lonnet::unescape($version),
1538: notes => &Apache::lonnet::unescape($notes),
1539: abstract => &Apache::lonnet::unescape($abstract),
1540: mime => &Apache::lonnet::unescape($mime),
1541: lang => &Apache::lonnet::unescape($lang),
1542: owner => &Apache::lonnet::unescape($owner),
1543: copyright => &Apache::lonnet::unescape($copyright),
1544: creationdate => &Apache::lonnet::unescape($creationdate),
1545: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
1546: );
1547: $Fields{'language'} =
1548: &Apache::loncommon::languagedescription($Fields{'lang'});
1549: $Fields{'copyrighttag'} =
1550: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
1551: $Fields{'mimetag'} =
1552: &Apache::loncommon::filedescription($Fields{'mime'});
1553: if ($Fields{'author'}=~/^(\s*|error)$/) {
1554: $Fields{'author'}="Unknown Author";
1555: }
1556: # Put spaces in the keyword list, if needed.
1557: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
1558: if ($Fields{'title'}=~ /^\s*$/ ) {
1559: $Fields{'title'}='Untitled';
1560: }
1561: unless ($ENV{'user.adv'}) {
1562: $Fields{'keywords'} = '- not displayed -';
1563: $Fields{'notes'} = '- not displayed -';
1564: $Fields{'abstract'} = '- not displayed -';
1565: $Fields{'subject'} = '- not displayed -';
1566: }
1567: if (length($Fields{'abstract'})>200) {
1568: $Fields{'abstract'} =
1569: substr($Fields{'abstract'},0,200).'...';
1570: }
1571: if (length($Fields{'keywords'})>200) {
1572: $Fields{'keywords'} =
1573: substr($Fields{'keywords'},0,200).'...';
1574: }
1575: return %Fields;
1576: }
1577:
1578: ###########################################################
1579: ###########################################################
1580:
1581: =pod
1582:
1583: =item &handle_custom_fields()
1584:
1585: =cut
1586:
1587: ###########################################################
1588: ###########################################################
1589: sub handle_custom_fields {
1590: my @results = @{shift()};
1591: my $customshow='';
1592: my $extrashow='';
1593: my @customfields;
1594: if ($ENV{'form.customshow'}) {
1595: $customshow=$ENV{'form.customshow'};
1596: $customshow=~s/[^\w\s]//g;
1597: my @fields=map {
1598: "<font color=\"#008000\">$_:</font><!-- $_ -->";
1599: } split(/\s+/,$customshow);
1600: @customfields=split(/\s+/,$customshow);
1601: if ($customshow) {
1602: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1603: }
1604: }
1605: my $customdata='';
1606: my %customhash;
1607: foreach my $result (@results) {
1608: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1609: my $tmp=$result;
1610: $tmp=~s/^custom\=//;
1611: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1612: } split(/\,/,$tmp);
1613: $customhash{$k}=$v;
1614: }
1615: }
1616: return ($extrashow,\@customfields,\%customhash);
1617: }
1618:
1619: ######################################################################
1620: ######################################################################
1621:
1622: =pod
1623:
1624: =item &search_results_header
1625:
1626: Output the proper html headers and javascript code to deal with different
1627: calling modes.
1628:
1629: Takes most inputs directly from %ENV, except $mode.
1630:
1631: =over 4
1632:
1633: =item $mode is either (at this writing) 'Basic' or 'Advanced'
1634:
1635: =back
1636:
1637: The following environment variables are checked:
1638:
1639: =over 4
1640:
1641: =item 'form.catalogmode'
1642:
1643: Checked for 'interactive' and 'groupsearch'.
1644:
1645: =item 'form.mode'
1646:
1647: Checked for existance & 'edit' mode.
1648:
1649: =item 'form.form'
1650:
1651: =item 'form.element'
1652:
1653: =back
1654:
1655: =cut
1656:
1657: ######################################################################
1658: ######################################################################
1659: sub search_results_header {
1660: my ($mode) = @_;
1661: $mode = lc($mode);
1662: my $title;
1663: if ($mode eq 'advanced') {
1664: $title = "Advanced Search Results";
1665: } elsif ($mode eq 'basic') {
1666: $title = "Basic Search Results";
1667: }
1668: my $result = '';
1669: # output beginning of search page
1670: $result.=<<BEGINNING;
1671: <html>
1672: <head>
1673: <title>$title</title>
1674: BEGINNING
1675: # conditional output of script functions dependent on the mode in
1676: # which the search was invoked
1677: if ($ENV{'form.catalogmode'} eq 'interactive'){
1678: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
1679: $result.=<<SCRIPT;
1680: <script type="text/javascript">
1681: function select_data(title,url) {
1682: changeTitle(title);
1683: changeURL(url);
1684: self.close();
1685: }
1686: function changeTitle(val) {
1687: if (opener.inf.document.forms.resinfo.elements.t) {
1688: opener.inf.document.forms.resinfo.elements.t.value=val;
1689: }
1690: }
1691: function changeURL(val) {
1692: if (opener.inf.document.forms.resinfo.elements.u) {
1693: opener.inf.document.forms.resinfo.elements.u.value=val;
1694: }
1695: }
1696: </script>
1697: SCRIPT
1698: } elsif ($ENV{'form.mode'} eq 'edit') {
1699: my $form = $ENV{'form.form'};
1700: my $element = $ENV{'form.element'};
1701: $result.=<<SCRIPT;
1702: <script type="text/javascript">
1703: function select_data(title,url) {
1704: changeURL(url);
1705: self.close();
1706: }
1707: function changeTitle(val) {
1708: }
1709: function changeURL(val) {
1710: if (window.opener.document) {
1711: window.opener.document.forms["$form"].elements["$element"].value=val;
1712: } else {
1713: var url = 'forms[\"$form\"].elements[\"$element\"].value';
1714: alert("Unable to transfer data to "+url);
1715: }
1716: }
1717: </script>
1718: SCRIPT
1719: }
1720: }
1721: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
1722: <script type="text/javascript">
1723: function select_data(title,url) {
1724: // alert('DEBUG: Should be storing '+title+' and '+url);
1725: }
1726: function queue(val) {
1727: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
1728: document.forms.results.acts.value+='1a'+val+'b';
1729: }
1730: else {
1731: document.forms.results.acts.value+='0a'+val+'b';
1732: }
1733: }
1734: function select_group() {
1735: window.location=
1736: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
1737: document.forms.results.acts.value;
1738: }
1739: </script>
1740: SCRIPT
1741: $result.=<<SCRIPT;
1742: <script type="text/javascript">
1743: function displayinfo(val) {
1744: popwin.document.forms.popremain.sdetails.value=val;
1745: }
1746: function openhelp(val) {
1747: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
1748: 'scrollbars=1,width=400,height=300');
1749: openhelpwin.focus();
1750: }
1751: function abortsearch(val) {
1752: popwin.close();
1753: }
1754: </script>
1755: SCRIPT
1756: $result.=<<END;
1757: </head>
1758: <body bgcolor="#ffffff">
1759: <img align=right src=/adm/lonIcons/lonlogos.gif>
1760: <h1>$title</h1>
1761: END
1762: return $result;
1763: }
1764:
1765: ######################################################################
1766: ######################################################################
1767:
1768: =pod
1769:
1770: =item &make_popwin()
1771:
1772: Returns html with javascript in it to open up the status window.
1773:
1774: =cut
1775:
1776: ######################################################################
1777: ######################################################################
1778: sub make_popwin {
1779: my %rhash = @_;
1780: my $servernum=(keys %rhash);
1781: my $hcinit;
1782: my $grid="'<br />'+\n";
1783: # $sn is the server number, used ONLY to make sure we have
1784: # rows of 10 each. No longer used to index images.
1785: my $sn=1;
1786: foreach my $sk (sort keys %rhash) {
1787: $grid.="'<a href=\"";
1788: $grid.="javascript:opener.displayinfo('+";
1789: $grid.="\"'\"+'";
1790: $grid.=$sk;
1791: my $hc;
1792: if ($rhash{$sk} eq 'con_lost') {
1793: $hc="BAD CONNECTION ";
1794: }
1795: else {
1796: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1797: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1798: }
1799: $grid.=" hitcount=".$hc;
1800: $grid.=" domain=".$Apache::lonnet::hostdom{$sk};
1801: $grid.=" IP=".$Apache::lonnet::hostip{$sk};
1802: # '+"'"+'">'+
1803: $grid.="'+\"'\"+')\">'+";
1804: $grid.="\n";
1805: $grid.="'<img border=\"0\" name=\"img_".$Apache::lonnet::hostdom{$sk}.
1806: '_'.$sk."\" src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk.
1807: "\" /></a>'+\n";
1808: $grid.="'<br />'+\n" unless $sn%10;
1809: $sn++;
1810: }
1811: my $result.=<<ENDPOP;
1812: <script type="text/javascript">
1813: popwin=open('','popwin','scrollbars=1,width=400,height=220');
1814: popwin.focus();
1815: popwin.document.writeln('<'+'html>');
1816: popwin.document.writeln('<'+'head>');
1817: popwin.document.writeln('<'+'script>');
1818: popwin.document.writeln('hc=new Array();$hcinit');
1819: popwin.document.writeln('<'+'/script>');
1820: popwin.document.writeln('<'+'/head>'+
1821: '<'+'body bgcolor="#FFFFFF">'+
1822: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1823: 'lonanim.gif" '+
1824: 'alt="animated logo" />'+
1825: '<'+'h3>Search Results Progress<'+'/h3>'+
1826: '<'+'form name="popremain">'+
1827: '<'+'tt>'+
1828: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1829: '<'+'br />SCANNING $servernum SERVERS'+
1830: '<'+'br clear="all" />Number of record hits found '+
1831: '<'+'input type="text" size="10" name="numhits"'+
1832: ' value="0" />'+
1833: '<'+'br clear="all" />Time elapsed '+
1834: '<'+'input type="text" size="10" name="elapsetime"'+
1835: ' value="0" />'+
1836: '<'+'br />'+
1837: 'SERVER GRID (click on any cell for details)'+
1838: $grid
1839: '<'+'br />'+
1840: 'Server details '+
1841: '<'+'input type="text" size="35" name="sdetails"'+
1842: ' value="" />'+
1843: '<'+'br />'+
1844: ' <'+'input type="button" name="button"'+
1845: ' value="close this window" '+
1846: ' onClick="javascript:opener.abortsearch()" />'+
1847: ' <'+'input type="button" name="button"'+
1848: ' value="help" onClick="javascript:opener.openhelp()" />'+
1849: '<'+'/tt>'+
1850: '<'+'/form>'+
1851: '<'+'/body><'+'/html>');
1852: popwin.document.close();
1853: </script>
1854: ENDPOP
1855: return $result;
1856: }
1857:
1858: ######################################################################
1859: ######################################################################
1860:
1861: =pod
1862:
1863: =item Metadata Viewing Functions
1864:
1865: Output is a HTML-ified string.
1866: Input arguments are title, author, subject, url, keywords, version,
1867: notes, short abstract, mime, language, creation date,
1868: last revision date, owner, copyright, hostname, and
1869: extra custom metadata to show.
1870:
1871: =over 4
1872:
1873: =item &detailed_citation_view()
1874:
1875: =cut
1876:
1877: ######################################################################
1878: ######################################################################
1879: sub detailed_citation_view {
1880: my %values = @_;
1881: my $result=<<END;
1882: <h3><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1883: target='search_preview'>$values{'title'}</a></h3>
1884: <p>
1885: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
1886:
1887: <b>Subject: </b> $values{'subject'}<br />
1888: <b>Keyword(s): </b> $values{'keywords'}<br />
1889: <b>Notes: </b> $values{'notes'}<br />
1890: <b>MIME Type: </b> $values{'mimetag'}<br />
1891: <b>Language: </b> $values{'language'}<br />
1892: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
1893: </p>
1894: $values{'extrashow'}
1895: <p>
1896: $values{'shortabstract'}
1897: </p>
1898: END
1899: return $result;
1900: }
1901:
1902: ######################################################################
1903: ######################################################################
1904:
1905: =pod
1906:
1907: =item &summary_view()
1908:
1909: =cut
1910:
1911: ######################################################################
1912: ######################################################################
1913: sub summary_view {
1914: my %values = @_;
1915: my $result=<<END;
1916: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1917: target='search_preview'>$values{'author'}</a><br />
1918: $values{'title'}<br />
1919: $values{'owner'} -- $values{'lastrevisiondate'}<br />
1920: $values{'copyrighttag'}<br />
1921: $values{'extrashow'}
1922: </p>
1923: END
1924: return $result;
1925: }
1926:
1927: ######################################################################
1928: ######################################################################
1929:
1930: =pod
1931:
1932: =item &fielded_format_view()
1933:
1934: =cut
1935:
1936: ######################################################################
1937: ######################################################################
1938: sub fielded_format_view {
1939: my %values = @_;
1940: my $result=<<END;
1941: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1942: target='search_preview'>$values{'url'}</a>
1943: <br />
1944: <b>Title:</b> $values{'title'}<br />
1945: <b>Author(s):</b> $values{'author'}<br />
1946: <b>Subject:</b> $values{'subject'}<br />
1947: <b>Keyword(s):</b> $values{'keywords'}<br />
1948: <b>Notes:</b> $values{'notes'}<br />
1949: <b>MIME Type:</b> $values{'mimetag'}<br />
1950: <b>Language:</b> $values{'language'}<br />
1951: <b>Creation Date:</b> $values{'creationdate'}<br />
1952: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
1953: <b>Publisher/Owner:</b> $values{'owner'}<br />
1954: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
1955: <b>Repository Location:</b> $values{'hostname'}<br />
1956: <b>Abstract:</b> $values{'shortabstract'}<br />
1957: $values{'extrashow'}
1958: </p>
1959: END
1960: return $result;
1961: }
1962:
1963: ######################################################################
1964: ######################################################################
1965:
1966: =pod
1967:
1968: =item &xml_sgml_view()
1969:
1970: =back
1971:
1972: =cut
1973:
1974: ######################################################################
1975: ######################################################################
1976: sub xml_sgml_view {
1977: my %values = @_;
1978: my $result=<<END;
1979: <pre>
1980: <LonCapaResource>
1981: <url>$values{'url'}</url>
1982: <title>$values{'title'}</title>
1983: <author>$values{'author'}</author>
1984: <subject>$values{'subject'}</subject>
1985: <keywords>$values{'keywords'}</keywords>
1986: <notes>$values{'notes'}</notes>
1987: <mimeInfo>
1988: <mime>$values{'mime'}</mime>
1989: <mimetag>$values{'mimetag'}</mimetag>
1990: </mimeInfo>
1991: <languageInfo>
1992: <language>$values{'lang'}</language>
1993: <languagetag>$values{'language'}</languagetag>
1994: </languageInfo>
1995: <creationdate>$values{'creationdate'}</creationdate>
1996: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
1997: <owner>$values{'owner'}</owner>
1998: <copyrightInfo>
1999: <copyright>$values{'copyright'}</copyright>
2000: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2001: </copyrightInfo>
2002: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2003: <shortabstract>$values{'shortabstract'}</shortabstract>
2004: </LonCapaResource>
2005: </pre>
2006: $values{'extrashow'}
2007: END
2008: return $result;
2009: }
2010:
2011: ######################################################################
2012: ######################################################################
2013:
2014: =pod
2015:
2016: =item &filled() see if field is filled.
2017:
2018: =cut
2019:
2020: ######################################################################
2021: ######################################################################
2022: sub filled {
2023: my ($field)=@_;
2024: if ($field=~/\S/ && $field ne 'any') {
2025: return 1;
2026: }
2027: else {
2028: return 0;
2029: }
2030: }
2031:
2032: ######################################################################
2033: ######################################################################
2034:
2035: =pod
2036:
2037: =item &output_blank_field_error()
2038:
2039: =cut
2040:
2041: ######################################################################
2042: ######################################################################
2043: sub output_blank_field_error {
2044: my ($r)=@_;
2045: # make query information persistent to allow for subsequent revision
2046: my $persistent=&make_persistent(\%ENV);
2047:
2048: $r->print(<<BEGINNING);
2049: <html>
2050: <head>
2051: <title>The LearningOnline Network with CAPA</title>
2052: BEGINNING
2053: $r->print(<<RESULTS);
2054: </head>
2055: <body bgcolor="#ffffff">
2056: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2057: <h1>Search Catalog</h1>
2058: <form method="post" action="/adm/searchcat">
2059: $persistent
2060: <input type='button' value='Revise search request'
2061: onClick='this.form.submit();' />
2062: $closebutton
2063: <hr />
2064: <h3>Helpful Message</h3>
2065: <p>
2066: Incorrect search query due to blank entry fields.
2067: You need to fill in the relevant
2068: fields on the search page in order for a query to be
2069: processed.
2070: </p>
2071: </body>
2072: </html>
2073: RESULTS
2074: }
2075:
2076: ######################################################################
2077: ######################################################################
2078:
2079: =pod
2080:
2081: =item &output_date_error()
2082:
2083: Output a full html page with an error message.
2084:
2085: =cut
2086:
2087: ######################################################################
2088: ######################################################################
2089: sub output_date_error {
2090: my ($r,$message)=@_;
2091: # make query information persistent to allow for subsequent revision
2092: my $persistent=&make_persistent(\%ENV);
2093:
2094: $r->print(<<RESULTS);
2095: <html>
2096: <head>
2097: <title>The LearningOnline Network with CAPA</title>
2098: </head>
2099: <body bgcolor="#ffffff">
2100: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2101: <h1>Search Catalog</h1>
2102: <form method="post" action="/adm/searchcat">
2103: $persistent
2104: <input type='button' value='Revise search request'
2105: onClick='this.form.submit();' />
2106: $closebutton
2107: <hr />
2108: <h3>Helpful Message</h3>
2109: <p>
2110: $message
2111: </p>
2112: </body>
2113: </html>
2114: RESULTS
2115: }
2116:
2117: ######################################################################
2118: ######################################################################
2119:
2120: =pod
2121:
2122: =item &start_fresh_session()
2123:
2124: Cleans the global %groupsearch_db by removing all fields which begin with
2125: 'pre_' or 'store'.
2126:
2127: =cut
2128:
2129: ######################################################################
2130: ######################################################################
2131: sub start_fresh_session {
2132: delete $groupsearch_db{'mode_catalog'};
2133: foreach (keys %groupsearch_db) {
2134: if ($_ =~ /^pre_/) {
2135: delete $groupsearch_db{$_};
2136: }
2137: if ($_ =~ /^store/) {
2138: delete $groupsearch_db{$_};
2139: }
2140: }
2141: }
2142:
2143: ######################################################################
2144: ######################################################################
2145:
2146: =pod
2147:
2148: =item &popwin_js() send javascript to popwin
2149:
2150: =cut
2151:
2152: ######################################################################
2153: ######################################################################
2154: sub popwin_js {
2155: # Print javascript out to popwin, but make sure we dont generate
2156: # any javascript errors in doing so.
2157: my ($r,$text) = @_;
2158: $r->print(<<"END");
2159: <script type="text/javascript">
2160: if (! popwin.closed) {
2161: $text
2162: }
2163: </script>
2164: END
2165: $r->rflush();
2166: }
2167:
2168: ######################################################################
2169: ######################################################################
2170:
2171: =pod
2172:
2173: =item &popwin_imgupdate()
2174:
2175: Send a given image (and its location) out to the browser. Takes as
2176: input $r, loncapa server id, and an icon URL.
2177:
2178: =cut
2179:
2180: ######################################################################
2181: ######################################################################
2182: sub popwin_imgupdate {
2183: my ($r,$server,$icon) = @_;
2184: &popwin_js($r,'popwin.document.img_'.$Apache::lonnet::hostdom{$server}.
2185: '_'.$server.'.'.'src="/adm/lonIcons/'.$icon.'";');
2186: }
2187:
2188: 1;
2189:
2190: __END__
2191:
2192: =pod
2193:
2194: =back
2195:
2196: =cut
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