File:
[LON-CAPA] /
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interface /
lonsearchcat.pm
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1.143:
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Tue Jul 16 15:02:06 2002 UTC (21 years, 10 months ago) by
matthew
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HEAD
Very beginnings of results database started.
&handler, &parse_basic_search, and &parse_advanced_search
Added support for 'pretty' version of query string which appears at the
top of the search results page.
&search_results_header
Print out the pretty query string.
1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.143 2002/07/16 15:02:06 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: =item $results_db
129:
130: The name of the database results from searches are put in.
131:
132: =back
133:
134: =cut
135:
136: ######################################################################
137: ######################################################################
138:
139: # -- dynamically rendered interface components
140: my $closebutton; # button that closes the search window
141: my $importbutton; # button to take the selected results and go to group sorting
142:
143: # -- miscellaneous variables
144: my %groupsearch_db; # database hash
145: my $diropendb = ""; # db file
146:
147: my $results_db = "";
148: # View Description Function Pointer
149: my %Views = ("Detailed Citation View" => \&detailed_citation_view,
150: "Summary View" => \&summary_view,
151: "Fielded Format" => \&fielded_format_view,
152: "XML/SGML" => \&xml_sgml_view );
153:
154: ######################################################################
155: ######################################################################
156:
157: =pod
158:
159: =item &handler() - main handler invoked by httpd child
160:
161: =item Variables
162:
163: =over 4
164:
165: =item $hidden
166:
167: holds 'hidden' html forms
168:
169: =item $scrout
170:
171: string that holds portions of the screen output
172:
173: =back
174:
175: =cut
176:
177: ######################################################################
178: ######################################################################
179: sub handler {
180: my $r = shift;
181: untie %groupsearch_db;
182:
183: $r->content_type('text/html');
184: $r->send_http_header;
185: return OK if $r->header_only;
186: ##
187: ## Initialize global variables
188: ##
189: my $domain = $r->dir_config('lonDefDomain');
190: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
191: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
192: $results_db = "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
193: '_'.&Apache::lonnet::escape($ENV{'user.name'})."_searchresults.db";
194: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
195: ['catalogmode','launch','acts','mode','form','element',
196: 'reqinterface']);
197: ##
198: ## Clear out old values from groupsearch database
199: ##
200: if ($ENV{'form.launch'} eq '1') {
201: if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
202: &start_fresh_session();
203: untie %groupsearch_db;
204: } else {
205: $r->print('<html><head></head><body>Unable to tie hash to db '.
206: 'file</body></html>');
207: return OK;
208: }
209: }
210: ##
211: ## Produce some output, so people know it is working
212: ##
213: $r->print("\n");
214: $r->rflush;
215: ##
216: ## Configure dynamic components of interface
217: ##
218: my $hidden; # Holds 'hidden' html forms
219: if ($ENV{'form.catalogmode'} eq 'interactive') {
220: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
221: "\n";
222: $closebutton="<input type='button' name='close' value='CLOSE' ".
223: "onClick='self.close()'>"."\n";
224: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
225: $hidden=<<END;
226: <input type='hidden' name='catalogmode' value='groupsearch'>
227: END
228: $closebutton=<<END;
229: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
230: END
231: $importbutton=<<END;
232: <input type='button' name='import' value='IMPORT'
233: onClick='javascript:select_group()'>
234: END
235: }
236: $hidden .= &make_persistent({ "form.mode" => $ENV{'form.mode'},
237: "form.form" => $ENV{'form.form'},
238: "form.element" => $ENV{'form.element'},
239: "form.date" => 2 });
240: ##
241: ## What are we doing?
242: ##
243: my $searchtype;
244: $searchtype = 'Basic' if ($ENV{'form.basicsubmit'} eq 'SEARCH');
245: $searchtype = 'Advanced' if ($ENV{'form.advancedsubmit'} eq 'SEARCH');
246: if ($searchtype) {
247: # We are running a search
248: my ($query,$customquery,$customshow,$libraries) =
249: (undef,undef,undef,undef);
250: my $pretty_string;
251: if ($searchtype eq 'Basic') {
252: ($query,$pretty_string) = &parse_basic_search($r);
253: } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
254: ($query,$customquery,$customshow,$libraries,$pretty_string)
255: = &parse_advanced_search($r);
256: return OK if (! defined($query));
257: }
258: # Output some information to the user.
259: $r->print(&search_results_header($searchtype,$pretty_string));
260: $r->print("Sending search request to LON-CAPA servers.<br />\n");
261: $r->rflush();
262: # Send query statements over the network to be processed by
263: # either the SQL database or a recursive scheme of 'grep'-like
264: # actions (for custom metadata).
265: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
266: $customshow,$libraries);
267: $r->rflush();
268: &output_results($searchtype,$r,$reply,$hidden);
269: } else {
270: #
271: # We need to get information to search on
272: #
273: # Set the default view if it is not already set.
274: if (!defined($ENV{'form.viewselect'})) {
275: $ENV{'form.viewselect'} ="Detailed Citation View";
276: }
277: # Output the advanced interface
278: if ($ENV{'form.reqinterface'} eq 'advanced') {
279: $r->print(&advanced_search_form($closebutton,$hidden));
280: } else {
281: # Output normal search interface
282: $r->print(&basic_search_form($closebutton,$hidden));
283: }
284: }
285: return OK;
286: }
287:
288: ######################################################################
289: ######################################################################
290:
291: =pod
292:
293: =item &basic_search_form()
294:
295: Returns a scalar which holds html for the basic search form.
296:
297: =cut
298:
299: ######################################################################
300: ######################################################################
301:
302: sub basic_search_form{
303: my ($closebutton,$hidden) = @_;
304: my $scrout=<<"ENDDOCUMENT";
305: <html>
306: <head>
307: <title>The LearningOnline Network with CAPA</title>
308: <script type="text/javascript">
309: function openhelp(val) {
310: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
311: 'scrollbars=1,width=600,height=300');
312: openhelpwin.focus();
313: }
314: </script>
315: </head>
316: <body bgcolor="#FFFFFF">
317: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
318: <h1>Search Catalog</h1>
319: <form method="post" action="/adm/searchcat">
320: $hidden
321: <h3>Basic Search</h3>
322: <p>
323: Enter terms or phrases separated by AND, OR, or NOT
324: then press SEARCH below.
325: </p>
326: <p>
327: <table>
328: <tr><td>
329: ENDDOCUMENT
330: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
331: ' ';
332: # $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'});
333: # $scrout.='<font color="#800000">Search historic archives</font>';
334: my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
335: $scrout.=<<END;
336: </td><td><a href="/adm/searchcat?reqinterface=advanced">Advanced Search</a></td></tr>
337: <tr><td>$checkbox use related words</td><td></td></tr>
338: </table>
339: </p>
340: <p>
341: <input type="submit" name="basicsubmit" value='SEARCH' />
342: $closebutton
343: END
344: $scrout.=&selectbox(undef,'viewselect',
345: $ENV{'form.viewselect'},
346: undef,undef,undef,
347: sort(keys(%Views)));
348: $scrout.=<<ENDDOCUMENT;
349: <input type="button" value="HELP" onClick="openhelp()" />
350: </p>
351: </form>
352: </body>
353: </html>
354: ENDDOCUMENT
355: return $scrout;
356: }
357: ######################################################################
358: ######################################################################
359:
360: =pod
361:
362: =item &advanced_search_form()
363:
364: Returns a scalar which holds html for the advanced search form.
365:
366: =cut
367:
368: ######################################################################
369: ######################################################################
370:
371: sub advanced_search_form{
372: my ($closebutton,$hidden) = @_;
373: my $advanced_buttons = <<"END";
374: <p>
375: <input type="submit" name="advancedsubmit" value='SEARCH' />
376: <input type="reset" name="reset" value='RESET' />
377: $closebutton
378: <input type="button" value="HELP" onClick="openhelp()" />
379: </p>
380: END
381: if (!defined($ENV{'form.viewselect'})) {
382: $ENV{'form.viewselect'} ="Detailed Citation View";
383: }
384: my $scrout=<<"ENDHEADER";
385: <html>
386: <head>
387: <title>The LearningOnline Network with CAPA</title>
388: <script type="text/javascript">
389: function openhelp(val) {
390: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
391: 'scrollbars=1,width=600,height=300');
392: openhelpwin.focus();
393: }
394: </script>
395: </head>
396: <body bgcolor="#FFFFFF">
397: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
398: <h1>Advanced Catalog Search</h1>
399: <hr />
400: Enter terms or phrases separated by search operators
401: such as AND, OR, or NOT.<br />
402: <form method="post" action="/adm/searchcat">
403: $advanced_buttons
404: $hidden
405: <table>
406: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
407: <td>
408: ENDHEADER
409: $scrout.=&selectbox(undef,'viewselect',
410: $ENV{'form.viewselect'},
411: undef,undef,undef,
412: sort(keys(%Views)));
413: $scrout.="</td><td>Related<br />Words</td></tr>\n";
414: $scrout.=&searchphrasefield_with_related('title', 'title' ,
415: $ENV{'form.title'});
416: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
417: $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
418: $ENV{'form.subject'});
419: $scrout.=&searchphrasefield_with_related('keywords','keywords',
420: $ENV{'form.keywords'});
421: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
422: $scrout.=&searchphrasefield_with_related('notes', 'notes' ,
423: $ENV{'form.notes'});
424: $scrout.=&searchphrasefield_with_related('abstract','abstract',
425: $ENV{'form.abstract'});
426: # Hack - an empty table row.
427: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
428: $scrout.=&searchphrasefield('file<br />extension','mime',
429: $ENV{'form.mime'});
430: $scrout.="<tr><td> </td><td> </td><td> </td></tr>\n";
431: $scrout.=&searchphrasefield('publisher<br />owner','owner',
432: $ENV{'form.owner'});
433: $scrout.="</table>\n";
434: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
435: $scrout.=&selectbox('File Category','category',
436: $ENV{'form.category'},
437: 'any','Any category',
438: undef,
439: (&Apache::loncommon::filecategories()));
440: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
441: #----------------------------------------------------------------
442: # Allow restriction to multiple domains.
443: # I make the crazy assumption that there will never be a domain 'any'.
444: #
445: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
446: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
447: : ($ENV{'form.domains'}) );
448: my %domain_hash = ();
449: foreach (@allowed_domains) {
450: $domain_hash{$_}++;
451: }
452: my @domains =&Apache::loncommon::get_domains();
453: # adjust the size of the select box
454: my $size = 4;
455: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
456: # standalone machines do not get to choose a domain to search.
457: if ((scalar @domains) == 1) {
458: $scrout .='<input type="hidden" name="domains" value="any" />'."\n";
459: } else {
460: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
461: 'DOMAINS</b></font><br />'.
462: '<select name="domains" size="'.$size.'" multiple>'."\n".
463: '<option name="any" value="any" '.
464: ($domain_hash{'any'}? 'selected ' :'').
465: '>all domains</option>'."\n";
466: foreach my $dom (sort @domains) {
467: $scrout.="<option name=\"$dom\" ".
468: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
469: }
470: $scrout.="</select>\n";
471: }
472: #----------------------------------------------------------------
473: $scrout.=&selectbox('Limit by language','language',
474: $ENV{'form.language'},'any','Any Language',
475: \&{Apache::loncommon::languagedescription},
476: (&Apache::loncommon::languageids),
477: );
478: # ------------------------------------------------ Compute date selection boxes
479: $scrout.=<<CREATIONDATESTART;
480: <p>
481: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
482: </font>
483: <br />
484: between:
485: CREATIONDATESTART
486: $scrout.=&dateboxes('creationdatestart',1,1,1976,
487: $ENV{'form.creationdatestart_month'},
488: $ENV{'form.creationdatestart_day'},
489: $ENV{'form.creationdatestart_year'},
490: );
491: $scrout.="and:\n";
492: $scrout.=&dateboxes('creationdateend',12,31,2051,
493: $ENV{'form.creationdateend_month'},
494: $ENV{'form.creationdateend_day'},
495: $ENV{'form.creationdateend_year'},
496: );
497: $scrout.="</p>";
498: $scrout.=<<LASTREVISIONDATESTART;
499: <p>
500: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
501: </b></font>
502: <br />between:
503: LASTREVISIONDATESTART
504: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
505: $ENV{'form.lastrevisiondatestart_month'},
506: $ENV{'form.lastrevisiondatestart_day'},
507: $ENV{'form.lastrevisiondatestart_year'},
508: );
509: $scrout.=<<LASTREVISIONDATEEND;
510: and:
511: LASTREVISIONDATEEND
512: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
513: $ENV{'form.lastrevisiondateend_month'},
514: $ENV{'form.lastrevisiondateend_day'},
515: $ENV{'form.lastrevisiondateend_year'},
516: );
517: $scrout.='</p>';
518: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
519: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
520: $ENV{'form.copyright'},
521: 'any','Any copyright/distribution',
522: \&{Apache::loncommon::copyrightdescription},
523: (&Apache::loncommon::copyrightids),
524: );
525: # ------------------------------------------- Compute customized metadata field
526: $scrout.=<<CUSTOMMETADATA;
527: <p>
528: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
529: </font>
530: For resource-specific metadata, enter in an expression in the form of
531: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
532: <b>Example:</b> grandmother=75 OR grandfather=85
533: <br />
534: CUSTOMMETADATA
535: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
536: $scrout.=<<CUSTOMSHOW;
537: <p>
538: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
539: </font>
540: Enter in a space-separated list of special metadata fields to show
541: in a fielded listing for each record result.
542: <br />
543: CUSTOMSHOW
544: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
545: $scrout.=<<ENDDOCUMENT;
546: $advanced_buttons
547: </form>
548: </body>
549: </html>
550: ENDDOCUMENT
551: return $scrout;
552: }
553:
554: ######################################################################
555: ######################################################################
556:
557: =pod
558:
559: =item &make_persistent()
560:
561: Returns a scalar which holds the current ENV{'form.*'} values in
562: a 'hidden' html input tag. This allows search interface information
563: to be somewhat persistent.
564:
565: =cut
566:
567: ######################################################################
568: ######################################################################
569:
570: sub make_persistent {
571: my %save = %{shift()};
572: my $persistent='';
573: foreach my $name (keys %save) {
574: if ($name =~ /^form\./ && $name !~ /submit/) {
575: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
576: $name=~s/^form\.//;
577: foreach (@values) {
578: s/\"/\'/g; # do not mess with html field syntax
579: next if (! $_ );
580: $persistent.=<<END;
581: <input type="hidden" name="$name" value="$_" />
582: END
583: }
584: }
585: }
586: return $persistent;
587: }
588:
589: ######################################################################
590: # HTML form building functions #
591: ######################################################################
592:
593: =pod
594:
595: =item HTML form building functions
596:
597: =over 4
598:
599: =cut
600:
601: ###############################################
602: ###############################################
603:
604: =pod
605:
606: =item &simpletextfield()
607:
608: Inputs: $name,$value,$size
609:
610: Returns a text input field with the given name, value, and size.
611: If size is not specified, a value of 20 is used.
612:
613: =cut
614:
615: ###############################################
616: ###############################################
617:
618: sub simpletextfield {
619: my ($name,$value,$size)=@_;
620: $size = 20 if (! defined($size));
621: return '<input type="text" name="'.$name.
622: '" size="'.$size.'" value="'.$value.'" />';
623: }
624:
625: ###############################################
626: ###############################################
627:
628: =pod
629:
630: =item &simplecheckbox()
631:
632: Inputs: $name,$value
633:
634: Returns a simple check box with the given $name.
635: If $value eq 'on' the box is checked.
636:
637: =cut
638:
639: ###############################################
640: ###############################################
641:
642: sub simplecheckbox {
643: my ($name,$value)=@_;
644: my $checked='';
645: $checked="checked" if $value eq 'on';
646: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
647: }
648:
649: ###############################################
650: ###############################################
651:
652: =pod
653:
654: =item &fieldtitle()
655:
656: Input: $title
657:
658: Returns a scalar with html which will display $title as a search
659: field heading.
660:
661: =cut
662:
663: ###############################################
664: ###############################################
665:
666: sub fieldtitle {
667: my $title = uc(shift());
668: return '<font color="#800000" face="helvetica"><b>'.$title.
669: ': </b></font>';
670: }
671:
672: ###############################################
673: ###############################################
674:
675: =pod
676:
677: =item &searchphrasefield()
678:
679: Inputs: $title,$name,$value
680:
681: Returns html for a title line and an input field for entering search terms.
682: The entry field (which is where the $name and $value are used) is a 50 column
683: simpletextfield. The html returned is for a row in a three column table.
684:
685: =cut
686:
687: ###############################################
688: ###############################################
689:
690: sub searchphrasefield {
691: my ($title,$name,$value)=@_;
692: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
693: &simpletextfield($name,$value,50)."</td><td> </td></tr>\n";
694: }
695:
696: ###############################################
697: ###############################################
698:
699: =pod
700:
701: =item &searchphrasefield_with_related()
702:
703: Inputs: $title,$name,$value
704:
705: Returns html for a title line and an input field for entering search terms
706: and a check box for 'related words'. The entry field (which is where the
707: $name and $value are used) is a 50 column simpletextfield. The name of
708: the related words checkbox is "$name_related".
709:
710: =cut
711:
712: ###############################################
713: ###############################################
714:
715: sub searchphrasefield_with_related {
716: my ($title,$name,$value)=@_;
717: return '<tr><td>'.&fieldtitle($title).'</td><td>'.
718: &simpletextfield($name,$value,50).'</td><td align="center"> '.
719: &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
720: " </td></tr>\n";
721: }
722:
723: ###############################################
724: ###############################################
725:
726: =pod
727:
728: =item &dateboxes()
729:
730: Returns html selection form elements for the specification of
731: the day, month, and year.
732:
733: =cut
734:
735: ###############################################
736: ###############################################
737:
738: sub dateboxes {
739: my ($name,$defaultmonth,$defaultday,$defaultyear,
740: $currentmonth,$currentday,$currentyear)=@_;
741: ($defaultmonth,$defaultday,$defaultyear)=('','','');
742: #
743: # Day
744: my $day=<<END;
745: <select name="${name}_day">
746: <option value='$defaultday'> </option>
747: END
748: for (my $i = 1; $i<=31; $i++) {
749: $day.="<option value=\"$i\">$i</option>\n";
750: }
751: $day.="</select>\n";
752: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
753: #
754: # Month
755: my $month=<<END;
756: <select name="${name}_month">
757: <option value='$defaultmonth'> </option>
758: END
759: my $i = 1;
760: foreach (qw/January February March April May June
761: July August September October November December /){
762: $month .="<option value=\"$i\">$_</option>\n";
763: $i++;
764: }
765: $month.="</select>\n";
766: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
767: #
768: # Year (obviously)
769: my $year=<<END;
770: <select name="${name}_year">
771: <option value='$defaultyear'> </option>
772: END
773: my $maxyear = 2051;
774: for (my $i = 1976; $i<=$maxyear; $i++) {
775: $year.="<option value=\"$i\">$i</option>\n";
776: }
777: $year.="</select>\n";
778: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
779: return "$month$day$year";
780: }
781:
782: ###############################################
783: ###############################################
784:
785: =pod
786:
787: =item &selectbox()
788:
789: Returns a scalar containing an html <select> form.
790:
791: Inputs:
792:
793: =over 4
794:
795: =item $title
796:
797: Printed above the select box, in uppercase. If undefined, only a select
798: box will be returned, with no additional html.
799:
800: =item $name
801:
802: The name element of the <select> tag.
803:
804: =item $default
805:
806: The default value of the form. Can be $anyvalue, or in @idlist.
807:
808: =item $anyvalue
809:
810: The <option value="..."> used to indicate a default of
811: none of the values. Can be undef.
812:
813: =item $anytag
814:
815: The text associate with $anyvalue above.
816:
817: =item $functionref
818:
819: Each element in @idlist will be passed as a parameter
820: to the function referenced here. The return value of the function should
821: be a scalar description of the items. If this value is undefined the
822: description of each item in @idlist will be the item name.
823:
824: =item @idlist
825:
826: The items to be selected from. One of these or $anyvalue will be the
827: value returned by the form element, $ENV{form.$name}.
828:
829: =back
830:
831: =cut
832:
833: ###############################################
834:
835: sub selectbox {
836: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
837: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
838: my $selout='';
839: if (defined($title)) {
840: my $uctitle=uc($title);
841: $selout="\n".'<p><font color="#800000" face="helvetica">'.
842: '<b>'.$uctitle.': </b></font>';
843: }
844: $selout .= '<select name="'.$name.'">';
845: unshift @idlist,$anyvalue if (defined($anyvalue));
846: foreach (@idlist) {
847: $selout.='<option value="'.$_.'"';
848: if ($_ eq $default and !/^any$/) {
849: $selout.=' selected >'.&{$functionref}($_).'</option>';
850: }
851: elsif ($_ eq $default and /^$anyvalue$/) {
852: $selout.=' selected >'.$anytag.'</option>';
853: }
854: else {$selout.='>'.&{$functionref}($_).'</option>';}
855: }
856: return $selout.'</select>'.(defined($title)?'</p>':' ');
857: }
858:
859: ######################################################################
860: # End of HTML form building functions #
861: ######################################################################
862:
863: =pod
864:
865: =back
866:
867: =cut
868:
869:
870: ######################################################################
871: ######################################################################
872:
873: =pod
874:
875: =item &parse_advanced_search()
876:
877: Parse advanced search form and return the following:
878:
879: =over 4
880:
881: =item $query Scalar containing an SQL query.
882:
883: =item $customquery Scalar containing a custom query.
884:
885: =item $customshow Scalar containing commands to show custom metadata.
886:
887: =item $libraries_to_query Reference to array of domains to search.
888:
889: =back
890:
891: =cut
892:
893: ######################################################################
894: ######################################################################
895: sub parse_advanced_search {
896: my ($r)=@_;
897: my $fillflag=0;
898: my $pretty_search_string = "<br />\n";
899: # Clean up fields for safety
900: for my $field ('title','author','subject','keywords','url','version',
901: 'creationdatestart_month','creationdatestart_day',
902: 'creationdatestart_year','creationdateend_month',
903: 'creationdateend_day','creationdateend_year',
904: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
905: 'lastrevisiondatestart_year','lastrevisiondateend_month',
906: 'lastrevisiondateend_day','lastrevisiondateend_year',
907: 'notes','abstract','mime','language','owner',
908: 'custommetadata','customshow','category') {
909: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
910: }
911: foreach ('mode','form','element') {
912: # is this required? Hmmm.
913: next unless (exists($ENV{"form.$_"}));
914: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
915: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
916: }
917: # Preprocess the category form element.
918: if ($ENV{'form.category'} ne 'any') {
919: my @extensions = &Apache::loncommon::filecategorytypes
920: ($ENV{'form.category'});
921: $ENV{'form.mime'} = join ' OR ',@extensions;
922: }
923: # Check to see if enough information was filled in
924: for my $field ('title','author','subject','keywords','url','version',
925: 'notes','abstract','mime','language','owner',
926: 'custommetadata') {
927: if (&filled($ENV{"form.$field"})) {
928: $fillflag++;
929: }
930: }
931: unless ($fillflag) {
932: &output_blank_field_error($r);
933: return ;
934: }
935: # Turn the form input into a SQL-based query
936: my $query='';
937: my @queries;
938: my $font = '<font color="#800000" face="helvetica">';
939: # Evaluate logical expression AND/OR/NOT phrase fields.
940: foreach my $field ('title','author','subject','notes','abstract','url',
941: 'keywords','version','owner','mime') {
942: if ($ENV{'form.'.$field}) {
943: my $searchphrase = $ENV{'form.'.$field};
944: $pretty_search_string .= $font."$field</font> contains <b>".
945: $searchphrase."</b>";
946: if ($ENV{'form.'.$field.'_related'}) {
947: my @New_Words;
948: ($searchphrase,@New_Words) = &related_version($searchphrase);
949: if (@New_Words) {
950: $pretty_search_string .= " with related words: ".
951: "<b>@New_Words</b>.";
952: } else {
953: $pretty_search_string .= " with no related words.";
954: }
955: }
956: $pretty_search_string .= "<br />\n";
957: push @queries,&build_SQL_query($field,$searchphrase);
958: }
959: }
960: # I dislike the hack below.
961: if ($ENV{'form.category'}) {
962: $ENV{'form.mime'}='';
963: }
964: # Evaluate option lists
965: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
966: push @queries,"(language like \"$ENV{'form.language'}\")";
967: $pretty_search_string.=$font."language</font>= ".
968: &Apache::loncommon::languagedescription($ENV{'form.language'}).
969: "<br />\n";
970: }
971: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
972: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
973: $pretty_search_string.=$font."copyright</font> = ".
974: &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
975: "<br \>\n";
976: }
977: #
978: # Evaluate date windows
979: my $datequery=&build_date_queries(
980: $ENV{'form.creationdatestart_month'},
981: $ENV{'form.creationdatestart_day'},
982: $ENV{'form.creationdatestart_year'},
983: $ENV{'form.creationdateend_month'},
984: $ENV{'form.creationdateend_day'},
985: $ENV{'form.creationdateend_year'},
986: $ENV{'form.lastrevisiondatestart_month'},
987: $ENV{'form.lastrevisiondatestart_day'},
988: $ENV{'form.lastrevisiondatestart_year'},
989: $ENV{'form.lastrevisiondateend_month'},
990: $ENV{'form.lastrevisiondateend_day'},
991: $ENV{'form.lastrevisiondateend_year'},
992: );
993: # Test to see if date windows are legitimate
994: if ($datequery=~/^Incorrect/) {
995: &output_date_error($r,$datequery);
996: return ;
997: } elsif ($datequery) {
998: # Here is where you would set up pretty_search_string to output
999: # date query information.
1000: push @queries,$datequery;
1001: }
1002: # Process form information for custom metadata querying
1003: my $customquery=undef;
1004: if ($ENV{'form.custommetadata'}) {
1005: $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
1006: $ENV{'form.custommetadata'}."</b><br />\n";
1007: $customquery=&build_custommetadata_query('custommetadata',
1008: $ENV{'form.custommetadata'});
1009: }
1010: my $customshow=undef;
1011: if ($ENV{'form.customshow'}) {
1012: $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
1013: $ENV{'form.customshow'}."</b><br />\n";
1014: $customshow=$ENV{'form.customshow'};
1015: $customshow=~s/[^\w\s]//g;
1016: my @fields=split(/\s+/,$customshow);
1017: $customshow=join(" ",@fields);
1018: }
1019: ## ---------------------------------------------------------------
1020: ## Deal with restrictions to given domains
1021: ##
1022: my $libraries_to_query = undef;
1023: # $ENV{'form.domains'} can be either a scalar or an array reference.
1024: # We need an array.
1025: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
1026: : ($ENV{'form.domains'}) );
1027: my %domain_hash = ();
1028: my $pretty_domains_string;
1029: foreach (@allowed_domains) {
1030: $domain_hash{$_}++;
1031: }
1032: if ($domain_hash{'any'}) {
1033: $pretty_domains_string = "Searching all domains.";
1034: } else {
1035: if (@allowed_domains > 1) {
1036: $pretty_domains_string = "Searching domains:";
1037: } else {
1038: $pretty_domains_string = "Searching domain ";
1039: }
1040: foreach (sort @allowed_domains) {
1041: $pretty_domains_string .= "<b>$_</b> ";
1042: }
1043: foreach (keys(%Apache::lonnet::libserv)) {
1044: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
1045: push @$libraries_to_query,$_;
1046: }
1047: }
1048: }
1049: $pretty_search_string .= $pretty_domains_string."<br />\n";
1050: #
1051: if (@queries) {
1052: $query=join(" AND ",@queries);
1053: $query="select * from metadata where $query";
1054: } elsif ($customquery) {
1055: $query = '';
1056: }
1057: return ($query,$customquery,$customshow,$libraries_to_query,
1058: $pretty_search_string);
1059: }
1060:
1061: ######################################################################
1062: ######################################################################
1063:
1064: =pod
1065:
1066: =item &parse_basic_search()
1067:
1068: Parse the basic search form and return a scalar containing an sql query.
1069:
1070: =cut
1071:
1072: ######################################################################
1073: ######################################################################
1074: sub parse_basic_search {
1075: my ($r)=@_;
1076: # Clean up fields for safety
1077: for my $field ('basicexp') {
1078: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
1079: }
1080: foreach ('mode','form','element') {
1081: # is this required? Hmmm.
1082: next unless (exists($ENV{"form.$_"}));
1083: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
1084: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
1085: }
1086:
1087: # Check to see if enough is filled in
1088: unless (&filled($ENV{'form.basicexp'})) {
1089: &output_blank_field_error($r);
1090: return OK;
1091: }
1092: my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
1093: my $search_string = $ENV{'form.basicexp'};
1094: if ($ENV{'form.related'}) {
1095: my @New_Words;
1096: ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
1097: if (@New_Words) {
1098: $pretty_search_string .= " with related words: <b>@New_Words</b>.";
1099: } else {
1100: $pretty_search_string .= " with no related words.";
1101: }
1102: }
1103: &Apache::lonnet::logthis("Search String: $search_string");
1104: # Build SQL query string based on form page
1105: my $query='';
1106: my $concatarg=join('," ",',
1107: ('title', 'author', 'subject', 'notes', 'abstract',
1108: 'keywords'));
1109: $concatarg='title' if $ENV{'form.titleonly'};
1110: $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
1111: $pretty_search_string .= "<br />\n";
1112: return 'select * from metadata where '.$query,$pretty_search_string;
1113: }
1114:
1115:
1116: ######################################################################
1117: ######################################################################
1118:
1119: =pod
1120:
1121: =item &related_version
1122:
1123: Modifies an input string to include related words. Words in the string
1124: are replaced with parenthesized lists of 'OR'd words. For example
1125: "torque" is replaced with "(torque OR word1 OR word2 OR ...)".
1126:
1127: Note: Using this twice on a string is probably silly.
1128:
1129: =cut
1130:
1131: ######################################################################
1132: ######################################################################
1133: sub related_version {
1134: my $search_string = shift;
1135: my $result = $search_string;
1136: my %New_Words = ();
1137: while ($search_string =~ /(\w+)/cg) {
1138: my $word = $1;
1139: next if (lc($word) =~ /\b(or|and|not)\b/);
1140: my @Words = &Apache::loncommon::get_related_words($word);
1141: @Words = ($#Words>4? @Words[0..4] : @Words);
1142: foreach (@Words) { $New_Words{$_}++;}
1143: my $replacement = join " OR ", ($word,@Words);
1144: $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
1145: }
1146: return $result,sort(keys(%New_Words));
1147: }
1148:
1149: ######################################################################
1150: ######################################################################
1151:
1152: =pod
1153:
1154: =item &build_SQL_query()
1155:
1156: Builds a SQL query string from a logical expression with AND/OR keywords
1157: using Text::Query and &recursive_SQL_query_builder()
1158:
1159: =cut
1160:
1161: ######################################################################
1162: ######################################################################
1163: sub build_SQL_query {
1164: my ($field_name,$logic_statement)=@_;
1165: my $q=new Text::Query('abc',
1166: -parse => 'Text::Query::ParseAdvanced',
1167: -build => 'Text::Query::Build');
1168: $q->prepare($logic_statement);
1169: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
1170: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
1171: return $sql_query;
1172: }
1173:
1174: ######################################################################
1175: ######################################################################
1176:
1177: =pod
1178:
1179: =item &build_custommetadata_query()
1180:
1181: Constructs a custom metadata query using a rather heinous regular
1182: expression.
1183:
1184: =cut
1185:
1186: ######################################################################
1187: ######################################################################
1188: sub build_custommetadata_query {
1189: my ($field_name,$logic_statement)=@_;
1190: my $q=new Text::Query('abc',
1191: -parse => 'Text::Query::ParseAdvanced',
1192: -build => 'Text::Query::BuildAdvancedString');
1193: $q->prepare($logic_statement);
1194: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
1195: # quick fix to change literal into xml tag-matching
1196: # will eventually have to write a separate builder module
1197: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
1198: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
1199: /\\<$1\\>?# \<wordone\>
1200: \[\^\\<\]?# [^\<]
1201: \*$2\[\^\\<\]?# *wordtwo[^\<]
1202: \*\\<\\\/$1\\>?# *\<\/wordone\>
1203: /g;
1204: return $matchexp;
1205: }
1206:
1207: ######################################################################
1208: ######################################################################
1209:
1210: =pod
1211:
1212: =item &recursive_SQL_query_build()
1213:
1214: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
1215:
1216: =cut
1217:
1218: ######################################################################
1219: ######################################################################
1220: sub recursive_SQL_query_build {
1221: my ($dkey,$pattern)=@_;
1222: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
1223: return $pattern unless @matches;
1224: foreach my $match (@matches) {
1225: $match=~/\[ (\w+)\s(.*) \]/;
1226: my ($key,$value)=($1,$2);
1227: my $replacement='';
1228: if ($key eq 'literal') {
1229: $replacement="($dkey like \"\%$value\%\")";
1230: }
1231: elsif ($key eq 'not') {
1232: $value=~s/like/not like/;
1233: # $replacement="($dkey not like $value)";
1234: $replacement="$value";
1235: }
1236: elsif ($key eq 'and') {
1237: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1238: $replacement="($1 AND $2)";
1239: }
1240: elsif ($key eq 'or') {
1241: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1242: $replacement="($1 OR $2)";
1243: }
1244: substr($pattern,
1245: index($pattern,$match),
1246: length($match),
1247: $replacement
1248: );
1249: }
1250: &recursive_SQL_query_build($dkey,$pattern);
1251: }
1252:
1253: ######################################################################
1254: ######################################################################
1255:
1256: =pod
1257:
1258: =item &build_date_queries()
1259:
1260: Builds a SQL logic query to check time/date entries.
1261: Also reports errors (check for /^Incorrect/).
1262:
1263: =cut
1264:
1265: ######################################################################
1266: ######################################################################
1267: sub build_date_queries {
1268: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1269: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1270: my @queries;
1271: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1272: unless ($cmonth1 and $cday1 and $cyear1 and
1273: $cmonth2 and $cday2 and $cyear2) {
1274: return "Incorrect entry for the creation date. You must specify ".
1275: "a starting month, day, and year and an ending month, ".
1276: "day, and year.";
1277: }
1278: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1279: $cnumeric1+=0;
1280: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1281: $cnumeric2+=0;
1282: if ($cnumeric1>$cnumeric2) {
1283: return "Incorrect entry for the creation date. The starting ".
1284: "date must occur before the ending date.";
1285: }
1286: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1287: "$cyear2-$cmonth2-$cday2 23:59:59')";
1288: push @queries,$cquery;
1289: }
1290: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1291: unless ($lmonth1 and $lday1 and $lyear1 and
1292: $lmonth2 and $lday2 and $lyear2) {
1293: return "Incorrect entry for the last revision date. You must ".
1294: "specify a starting month, day, and year and an ending ".
1295: "month, day, and year.";
1296: }
1297: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1298: $lnumeric1+=0;
1299: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1300: $lnumeric2+=0;
1301: if ($lnumeric1>$lnumeric2) {
1302: return "Incorrect entry for the last revision date. The ".
1303: "starting date must occur before the ending date.";
1304: }
1305: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1306: "$lyear2-$lmonth2-$lday2 23:59:59')";
1307: push @queries,$lquery;
1308: }
1309: if (@queries) {
1310: return join(" AND ",@queries);
1311: }
1312: return '';
1313: }
1314:
1315: ######################################################################
1316: ######################################################################
1317:
1318: =pod
1319:
1320: =item &output_results()
1321:
1322: Format and output results based on a reply list.
1323: There are two windows that this function writes to. The main search
1324: window ("srch") has a listing of the results. A secondary window ("popwin")
1325: gives the status of the network search (time elapsed, number of machines
1326: contacted, etc.)
1327:
1328: =cut
1329:
1330: ######################################################################
1331: ######################################################################
1332: sub output_results {
1333: # &Apache::lonnet::logthis("output_results:".time);
1334: my $fnum; # search result counter
1335: my ($mode,$r,$replyref,$hidden)=@_;
1336: my %rhash=%{$replyref};
1337: my $compiledresult='';
1338: my $timeremain=300; # (seconds)
1339: my $elapsetime=0;
1340: my $resultflag=0;
1341: my $tflag=1;
1342: ##
1343: ## Set viewing function
1344: ##
1345: my $viewfunction = $Views{$ENV{'form.viewselect'}};
1346: if (!defined($viewfunction)) {
1347: $r->print("Internal Error - Bad view selected.\n");
1348: $r->rflush();
1349: return;
1350: }
1351: #
1352: # make query information persistent to allow for subsequent revision
1353: my $persistent=&make_persistent(\%ENV);
1354: #
1355: # Begin producing output
1356: $r->rflush();
1357: #
1358: # begin showing the cataloged results
1359: my $action = "/adm/searchcat";
1360: if ($mode eq 'Basic') {
1361: $action .= "?reqinterface=basic";
1362: } elsif ($mode eq 'Advanced') {
1363: $action .= "?reqinterface=advanced";
1364: }
1365: $r->print(<<CATALOGCONTROLS);
1366: <form name='results' method="post" action="$action">
1367: $hidden
1368: <input type='hidden' name='acts' value='' />
1369: <input type='button' value='Revise search request'
1370: onClick='this.form.submit();' />
1371: $importbutton
1372: $closebutton
1373: $persistent
1374: <hr />
1375: CATALOGCONTROLS
1376: #
1377: # make the pop-up window for status
1378: $r->print(&make_popwin(%rhash));
1379: $r->rflush();
1380: ##
1381: ## Prepare for the main loop below
1382: ##
1383: my $servercount=0;
1384: my $hitcountsum=0;
1385: my $servernum=(keys %rhash);
1386: my $serversleft=$servernum;
1387: ##
1388: ## Run until we run out of time or we run out of servers
1389: ##
1390: while($serversleft && $timeremain) {
1391: ##
1392: ## %rhash has servers deleted from it as results come in
1393: ## (within the foreach loop below).
1394: ##
1395: foreach my $rkey (sort keys %rhash) {
1396: # &Apache::lonnet::logthis("Server $rkey:".time);
1397: $servercount++;
1398: $compiledresult='';
1399: my $reply=$rhash{$rkey};
1400: my @results;
1401: if ($reply eq 'con_lost') {
1402: &popwin_imgupdate($r,$rkey,"srvbad.gif");
1403: $serversleft--;
1404: delete $rhash{$rkey};
1405: } else {
1406: # must do since 'use strict' checks for tainting
1407: $reply=~/^([\.\w]+)$/;
1408: my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1409: $reply=~/(.*?)\_/;
1410: for (my $counter=0;$counter<2;$counter++) {
1411: if (-e $replyfile && ! -e "$replyfile.end") {
1412: &popwin_imgupdate($r,$rkey,"srvhalf.gif");
1413: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1414: '"still transferring..."'.';');
1415: }
1416: # Are we finished transferring data?
1417: if (-e "$replyfile.end") {
1418: $serversleft--;
1419: delete $rhash{$rkey};
1420: if (-s $replyfile) {
1421: &popwin_imgupdate($r,$rkey,"srvgood.gif");
1422: my $fh;
1423: unless ($fh=Apache::File->new($replyfile)){
1424: # Is it really appropriate to die on this error?
1425: $r->print('ERROR: file '.
1426: $replyfile.' cannot be opened');
1427: return OK;
1428: }
1429: @results=<$fh> if $fh;
1430: my $hits =@results;
1431: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1432: $hits.';');
1433: $hitcountsum+=$hits;
1434: &popwin_js($r,'popwin.document.forms.popremain.'.
1435: 'numhits.value='.$hitcountsum.';');
1436: } else {
1437: &popwin_imgupdate($r,$rkey,"srvempty.gif");
1438: &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
1439: }
1440: last;
1441: } # end of if ( -e "$replyfile.end")
1442: last unless $timeremain;
1443: sleep 1; # wait for daemons to write files?
1444: $timeremain--;
1445: $elapsetime++;
1446: &popwin_js($r,"popwin.document.popremain.".
1447: "elapsetime.value=$elapsetime;");
1448: }
1449: &popwin_js($r,'popwin.document.whirly.'.
1450: 'src="/adm/lonIcons/lonanimend.gif";');
1451: } # end of if ($reply eq 'con_lost') else statement
1452: my %Fields = undef; # Holds the data to be sent to the various
1453: # *_view routines.
1454: my ($extrashow,$customfields,$customhash) =
1455: &handle_custom_fields(\@results);
1456: my @customfields = @$customfields;
1457: my %customhash = %$customhash;
1458: untie %groupsearch_db if (tied %groupsearch_db);
1459: #
1460: if (! tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1461: $r->print('<html><head></head><body>Unable to tie hash to db '.
1462: 'file</body></html>');
1463: } else {
1464: if ($ENV{'form.launch'} eq '1') {
1465: &start_fresh_session();
1466: }
1467: foreach my $result (@results) {
1468: next if $result=~/^custom\=/;
1469: chomp $result;
1470: next unless $result;
1471: %Fields = &parse_raw_result($result,$rkey);
1472: #
1473: # Check copyright tags and skip results the user cannot use
1474: my (undef,undef,$resdom,$resname) = split('/',$Fields{'url'});
1475: # Check for priv
1476: if (($Fields{'copyright'} eq 'priv') &&
1477: (($ENV{'user.name'} ne $resname) &&
1478: ($ENV{'user.domain'} ne $resdom))) {
1479: next;
1480: }
1481: # Check for domain
1482: if (($Fields{'copyright'} eq 'domain') &&
1483: ($ENV{'user.domain'} ne $resdom)) {
1484: next;
1485: }
1486: #
1487: $Fields{'extrashow'}=$extrashow;
1488: if ($extrashow) {
1489: foreach my $field (@customfields) {
1490: my $value='';
1491: $value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s);
1492: $Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g;
1493: }
1494: }
1495: $compiledresult.="\n<p>\n";
1496: if ($ENV{'form.catalogmode'} eq 'interactive') {
1497: my $titleesc=$Fields{'title'};
1498: $titleesc=~s/\'/\\'/; # '
1499: $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');
1500: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1501: onClick="javascript:select_data('$titleesc','$Fields{'url'}')">
1502: </font>
1503: <br />
1504: END
1505: }
1506: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1507: $fnum+=0;
1508: $groupsearch_db{"pre_${fnum}_link"}=$Fields{'url'};
1509: $groupsearch_db{"pre_${fnum}_title"}=$Fields{'title'};
1510: $compiledresult.=<<END;
1511: <font size='-1'>
1512: <input type="checkbox" name="returnvalues" value="SELECT"
1513: onClick="javascript:queue($fnum)" />
1514: </font>
1515: <br />
1516: END
1517: # <input type="hidden" name="title$fnum" value="$title" />
1518: # <input type="hidden" name="url$fnum" value="$url" />
1519: $fnum++;
1520: }
1521: # Render the result into html
1522: $compiledresult.= &$viewfunction(%Fields, hostname => $rkey );
1523: if ($compiledresult or $servercount!=$servernum) {
1524: $compiledresult.="<hr align='left' width='200' noshade />";
1525: }
1526: }
1527: untie %groupsearch_db;
1528: }
1529: if ($compiledresult) {
1530: $resultflag=1;
1531: $r->print($compiledresult);
1532: }
1533: } # End of foreach loop over servers remaining
1534: } # End of big loop - while($serversleft && $timeremain)
1535: unless ($resultflag) {
1536: $r->print("\nThere were no results that matched your query\n");
1537: }
1538: $r->print('<script type="text/javascript">'.'popwin.close()</script>'.
1539: "\n");
1540: $r->print("</body>\n</html>\n");
1541: $r->rflush();
1542: return;
1543: }
1544:
1545: ###########################################################
1546: ###########################################################
1547:
1548: =pod
1549:
1550: =item &parse_raw_result()
1551:
1552: Takes a line from the file of results and parse it. Returns a hash
1553: with keys for the following fields:
1554: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
1555: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
1556: 'lastrevisiondate'.
1557:
1558: In addition, the following tags are set by calling the appropriate
1559: lonnet function: 'language', 'cprtag', 'mimetag'.
1560:
1561: The 'title' field is set to "Untitled" if the title field is blank.
1562:
1563: 'abstract' and 'keywords' are truncated to 200 characters.
1564:
1565: =cut
1566:
1567: ###########################################################
1568: ###########################################################
1569: sub parse_raw_result {
1570: my ($result,$hostname) = @_;
1571: # Check for a comma - if it is there then we do not need to unescape the
1572: # string. There seems to be some kind of problem with some items in
1573: # the database - the entire string gets sent out unescaped...?
1574: unless ($result =~ /,/) {
1575: $result = &Apache::lonnet::unescape($result);
1576: }
1577: my @fields=map {
1578: &Apache::lonnet::unescape($_);
1579: } (split(/\,/,$result));
1580: my ($title,$author,$subject,$url,$keywords,$version,
1581: $notes,$abstract,$mime,$lang,
1582: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1583: my %Fields =
1584: ( title => &Apache::lonnet::unescape($title),
1585: author => &Apache::lonnet::unescape($author),
1586: subject => &Apache::lonnet::unescape($subject),
1587: url => &Apache::lonnet::unescape($url),
1588: keywords => &Apache::lonnet::unescape($keywords),
1589: version => &Apache::lonnet::unescape($version),
1590: notes => &Apache::lonnet::unescape($notes),
1591: abstract => &Apache::lonnet::unescape($abstract),
1592: mime => &Apache::lonnet::unescape($mime),
1593: lang => &Apache::lonnet::unescape($lang),
1594: owner => &Apache::lonnet::unescape($owner),
1595: copyright => &Apache::lonnet::unescape($copyright),
1596: creationdate => &Apache::lonnet::unescape($creationdate),
1597: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
1598: );
1599: $Fields{'language'} =
1600: &Apache::loncommon::languagedescription($Fields{'lang'});
1601: $Fields{'copyrighttag'} =
1602: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
1603: $Fields{'mimetag'} =
1604: &Apache::loncommon::filedescription($Fields{'mime'});
1605: if ($Fields{'author'}=~/^(\s*|error)$/) {
1606: $Fields{'author'}="Unknown Author";
1607: }
1608: # Put spaces in the keyword list, if needed.
1609: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
1610: if ($Fields{'title'}=~ /^\s*$/ ) {
1611: $Fields{'title'}='Untitled';
1612: }
1613: unless ($ENV{'user.adv'}) {
1614: $Fields{'keywords'} = '- not displayed -';
1615: $Fields{'notes'} = '- not displayed -';
1616: $Fields{'abstract'} = '- not displayed -';
1617: $Fields{'subject'} = '- not displayed -';
1618: }
1619: if (length($Fields{'abstract'})>200) {
1620: $Fields{'abstract'} =
1621: substr($Fields{'abstract'},0,200).'...';
1622: }
1623: if (length($Fields{'keywords'})>200) {
1624: $Fields{'keywords'} =
1625: substr($Fields{'keywords'},0,200).'...';
1626: }
1627: return %Fields;
1628: }
1629:
1630: ###########################################################
1631: ###########################################################
1632:
1633: =pod
1634:
1635: =item &handle_custom_fields()
1636:
1637: =cut
1638:
1639: ###########################################################
1640: ###########################################################
1641: sub handle_custom_fields {
1642: my @results = @{shift()};
1643: my $customshow='';
1644: my $extrashow='';
1645: my @customfields;
1646: if ($ENV{'form.customshow'}) {
1647: $customshow=$ENV{'form.customshow'};
1648: $customshow=~s/[^\w\s]//g;
1649: my @fields=map {
1650: "<font color=\"#008000\">$_:</font><!-- $_ -->";
1651: } split(/\s+/,$customshow);
1652: @customfields=split(/\s+/,$customshow);
1653: if ($customshow) {
1654: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1655: }
1656: }
1657: my $customdata='';
1658: my %customhash;
1659: foreach my $result (@results) {
1660: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1661: my $tmp=$result;
1662: $tmp=~s/^custom\=//;
1663: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1664: } split(/\,/,$tmp);
1665: $customhash{$k}=$v;
1666: }
1667: }
1668: return ($extrashow,\@customfields,\%customhash);
1669: }
1670:
1671: ######################################################################
1672: ######################################################################
1673:
1674: =pod
1675:
1676: =item &search_results_header
1677:
1678: Output the proper html headers and javascript code to deal with different
1679: calling modes.
1680:
1681: Takes most inputs directly from %ENV, except $mode.
1682:
1683: =over 4
1684:
1685: =item $mode is either (at this writing) 'Basic' or 'Advanced'
1686:
1687: =back
1688:
1689: The following environment variables are checked:
1690:
1691: =over 4
1692:
1693: =item 'form.catalogmode'
1694:
1695: Checked for 'interactive' and 'groupsearch'.
1696:
1697: =item 'form.mode'
1698:
1699: Checked for existance & 'edit' mode.
1700:
1701: =item 'form.form'
1702:
1703: =item 'form.element'
1704:
1705: =back
1706:
1707: =cut
1708:
1709: ######################################################################
1710: ######################################################################
1711: sub search_results_header {
1712: my ($mode,$pretty_query) = @_;
1713: $mode = lc($mode);
1714: my $title;
1715: if ($mode eq 'advanced') {
1716: $title = "Advanced Search Results";
1717: } elsif ($mode eq 'basic') {
1718: $title = "Basic Search Results";
1719: }
1720: my $result = '';
1721: # output beginning of search page
1722: $result.=<<BEGINNING;
1723: <html>
1724: <head>
1725: <title>$title</title>
1726: BEGINNING
1727: # conditional output of script functions dependent on the mode in
1728: # which the search was invoked
1729: if ($ENV{'form.catalogmode'} eq 'interactive'){
1730: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
1731: $result.=<<SCRIPT;
1732: <script type="text/javascript">
1733: function select_data(title,url) {
1734: changeTitle(title);
1735: changeURL(url);
1736: self.close();
1737: }
1738: function changeTitle(val) {
1739: if (opener.inf.document.forms.resinfo.elements.t) {
1740: opener.inf.document.forms.resinfo.elements.t.value=val;
1741: }
1742: }
1743: function changeURL(val) {
1744: if (opener.inf.document.forms.resinfo.elements.u) {
1745: opener.inf.document.forms.resinfo.elements.u.value=val;
1746: }
1747: }
1748: </script>
1749: SCRIPT
1750: } elsif ($ENV{'form.mode'} eq 'edit') {
1751: my $form = $ENV{'form.form'};
1752: my $element = $ENV{'form.element'};
1753: $result.=<<SCRIPT;
1754: <script type="text/javascript">
1755: function select_data(title,url) {
1756: changeURL(url);
1757: self.close();
1758: }
1759: function changeTitle(val) {
1760: }
1761: function changeURL(val) {
1762: if (window.opener.document) {
1763: window.opener.document.forms["$form"].elements["$element"].value=val;
1764: } else {
1765: var url = 'forms[\"$form\"].elements[\"$element\"].value';
1766: alert("Unable to transfer data to "+url);
1767: }
1768: }
1769: </script>
1770: SCRIPT
1771: }
1772: }
1773: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
1774: <script type="text/javascript">
1775: function select_data(title,url) {
1776: // alert('DEBUG: Should be storing '+title+' and '+url);
1777: }
1778: function queue(val) {
1779: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
1780: document.forms.results.acts.value+='1a'+val+'b';
1781: }
1782: else {
1783: document.forms.results.acts.value+='0a'+val+'b';
1784: }
1785: }
1786: function select_group() {
1787: window.location=
1788: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
1789: document.forms.results.acts.value;
1790: }
1791: </script>
1792: SCRIPT
1793: $result.=<<SCRIPT;
1794: <script type="text/javascript">
1795: function displayinfo(val) {
1796: popwin.document.forms.popremain.sdetails.value=val;
1797: }
1798: function openhelp(val) {
1799: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
1800: 'scrollbars=1,width=400,height=300');
1801: openhelpwin.focus();
1802: }
1803: function abortsearch(val) {
1804: popwin.close();
1805: }
1806: </script>
1807: SCRIPT
1808: $result.=<<END;
1809: </head>
1810: <body bgcolor="#ffffff">
1811: <img align=right src=/adm/lonIcons/lonlogos.gif>
1812: <h1>$title</h1>
1813: END
1814: if ($pretty_query) {
1815: $result .= "<p>Search query: $pretty_query</p>";
1816: }
1817: return $result;
1818: }
1819:
1820: ######################################################################
1821: ######################################################################
1822:
1823: =pod
1824:
1825: =item &make_popwin()
1826:
1827: Returns html with javascript in it to open up the status window.
1828:
1829: =cut
1830:
1831: ######################################################################
1832: ######################################################################
1833: sub make_popwin {
1834: my %rhash = @_;
1835: my $servernum=(keys %rhash);
1836: my $hcinit;
1837: my $grid="'<br />'+\n";
1838: # $sn is the server number, used ONLY to make sure we have
1839: # rows of 10 each. No longer used to index images.
1840: my $sn=1;
1841: foreach my $sk (sort keys %rhash) {
1842: $grid.="'<a href=\"";
1843: $grid.="javascript:opener.displayinfo('+";
1844: $grid.="\"'\"+'";
1845: $grid.=$sk;
1846: my $hc;
1847: if ($rhash{$sk} eq 'con_lost') {
1848: $hc="BAD CONNECTION ";
1849: }
1850: else {
1851: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1852: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1853: }
1854: $grid.=" hitcount=".$hc;
1855: $grid.=" domain=".$Apache::lonnet::hostdom{$sk};
1856: $grid.=" IP=".$Apache::lonnet::hostip{$sk};
1857: # '+"'"+'">'+
1858: $grid.="'+\"'\"+')\">'+";
1859: $grid.="\n";
1860: $grid.="'<img border=\"0\" name=\"img_".$Apache::lonnet::hostdom{$sk}.
1861: '_'.$sk."\" src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk.
1862: "\" /></a>'+\n";
1863: $grid.="'<br />'+\n" unless $sn%10;
1864: $sn++;
1865: }
1866: my $result.=<<ENDPOP;
1867: <script type="text/javascript">
1868: popwin=open('','popwin','scrollbars=1,width=400,height=220');
1869: popwin.focus();
1870: popwin.document.writeln('<'+'html>');
1871: popwin.document.writeln('<'+'head>');
1872: popwin.document.writeln('<'+'script>');
1873: popwin.document.writeln('hc=new Array();$hcinit');
1874: popwin.document.writeln('<'+'/script>');
1875: popwin.document.writeln('<'+'/head>'+
1876: '<'+'body bgcolor="#FFFFFF">'+
1877: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1878: 'lonanim.gif" '+
1879: 'alt="animated logo" />'+
1880: '<'+'h3>Search Results Progress<'+'/h3>'+
1881: '<'+'form name="popremain">'+
1882: '<'+'tt>'+
1883: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1884: '<'+'br />SCANNING $servernum SERVERS'+
1885: '<'+'br clear="all" />Number of record hits found '+
1886: '<'+'input type="text" size="10" name="numhits"'+
1887: ' value="0" />'+
1888: '<'+'br clear="all" />Time elapsed '+
1889: '<'+'input type="text" size="10" name="elapsetime"'+
1890: ' value="0" />'+
1891: '<'+'br />'+
1892: 'SERVER GRID (click on any cell for details)'+
1893: $grid
1894: '<'+'br />'+
1895: 'Server details '+
1896: '<'+'input type="text" size="35" name="sdetails"'+
1897: ' value="" />'+
1898: '<'+'br />'+
1899: ' <'+'input type="button" name="button"'+
1900: ' value="close this window" '+
1901: ' onClick="javascript:opener.abortsearch()" />'+
1902: ' <'+'input type="button" name="button"'+
1903: ' value="help" onClick="javascript:opener.openhelp()" />'+
1904: '<'+'/tt>'+
1905: '<'+'/form>'+
1906: '<'+'/body><'+'/html>');
1907: popwin.document.close();
1908: </script>
1909: ENDPOP
1910: return $result;
1911: }
1912:
1913: ######################################################################
1914: ######################################################################
1915:
1916: =pod
1917:
1918: =item Metadata Viewing Functions
1919:
1920: Output is a HTML-ified string.
1921: Input arguments are title, author, subject, url, keywords, version,
1922: notes, short abstract, mime, language, creation date,
1923: last revision date, owner, copyright, hostname, and
1924: extra custom metadata to show.
1925:
1926: =over 4
1927:
1928: =item &detailed_citation_view()
1929:
1930: =cut
1931:
1932: ######################################################################
1933: ######################################################################
1934: sub detailed_citation_view {
1935: my %values = @_;
1936: my $result=<<END;
1937: <h3><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1938: target='search_preview'>$values{'title'}</a></h3>
1939: <p>
1940: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
1941:
1942: <b>Subject: </b> $values{'subject'}<br />
1943: <b>Keyword(s): </b> $values{'keywords'}<br />
1944: <b>Notes: </b> $values{'notes'}<br />
1945: <b>MIME Type: </b> $values{'mimetag'}<br />
1946: <b>Language: </b> $values{'language'}<br />
1947: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
1948: </p>
1949: $values{'extrashow'}
1950: <p>
1951: $values{'shortabstract'}
1952: </p>
1953: END
1954: return $result;
1955: }
1956:
1957: ######################################################################
1958: ######################################################################
1959:
1960: =pod
1961:
1962: =item &summary_view()
1963:
1964: =cut
1965:
1966: ######################################################################
1967: ######################################################################
1968: sub summary_view {
1969: my %values = @_;
1970: my $result=<<END;
1971: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1972: target='search_preview'>$values{'author'}</a><br />
1973: $values{'title'}<br />
1974: $values{'owner'} -- $values{'lastrevisiondate'}<br />
1975: $values{'copyrighttag'}<br />
1976: $values{'extrashow'}
1977: </p>
1978: END
1979: return $result;
1980: }
1981:
1982: ######################################################################
1983: ######################################################################
1984:
1985: =pod
1986:
1987: =item &fielded_format_view()
1988:
1989: =cut
1990:
1991: ######################################################################
1992: ######################################################################
1993: sub fielded_format_view {
1994: my %values = @_;
1995: my $result=<<END;
1996: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1997: target='search_preview'>$values{'url'}</a>
1998: <br />
1999: <b>Title:</b> $values{'title'}<br />
2000: <b>Author(s):</b> $values{'author'}<br />
2001: <b>Subject:</b> $values{'subject'}<br />
2002: <b>Keyword(s):</b> $values{'keywords'}<br />
2003: <b>Notes:</b> $values{'notes'}<br />
2004: <b>MIME Type:</b> $values{'mimetag'}<br />
2005: <b>Language:</b> $values{'language'}<br />
2006: <b>Creation Date:</b> $values{'creationdate'}<br />
2007: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
2008: <b>Publisher/Owner:</b> $values{'owner'}<br />
2009: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
2010: <b>Repository Location:</b> $values{'hostname'}<br />
2011: <b>Abstract:</b> $values{'shortabstract'}<br />
2012: $values{'extrashow'}
2013: </p>
2014: END
2015: return $result;
2016: }
2017:
2018: ######################################################################
2019: ######################################################################
2020:
2021: =pod
2022:
2023: =item &xml_sgml_view()
2024:
2025: =back
2026:
2027: =cut
2028:
2029: ######################################################################
2030: ######################################################################
2031: sub xml_sgml_view {
2032: my %values = @_;
2033: my $result=<<END;
2034: <pre>
2035: <LonCapaResource>
2036: <url>$values{'url'}</url>
2037: <title>$values{'title'}</title>
2038: <author>$values{'author'}</author>
2039: <subject>$values{'subject'}</subject>
2040: <keywords>$values{'keywords'}</keywords>
2041: <notes>$values{'notes'}</notes>
2042: <mimeInfo>
2043: <mime>$values{'mime'}</mime>
2044: <mimetag>$values{'mimetag'}</mimetag>
2045: </mimeInfo>
2046: <languageInfo>
2047: <language>$values{'lang'}</language>
2048: <languagetag>$values{'language'}</languagetag>
2049: </languageInfo>
2050: <creationdate>$values{'creationdate'}</creationdate>
2051: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
2052: <owner>$values{'owner'}</owner>
2053: <copyrightInfo>
2054: <copyright>$values{'copyright'}</copyright>
2055: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
2056: </copyrightInfo>
2057: <repositoryLocation>$values{'hostname'}</repositoryLocation>
2058: <shortabstract>$values{'shortabstract'}</shortabstract>
2059: </LonCapaResource>
2060: </pre>
2061: $values{'extrashow'}
2062: END
2063: return $result;
2064: }
2065:
2066: ######################################################################
2067: ######################################################################
2068:
2069: =pod
2070:
2071: =item &filled() see if field is filled.
2072:
2073: =cut
2074:
2075: ######################################################################
2076: ######################################################################
2077: sub filled {
2078: my ($field)=@_;
2079: if ($field=~/\S/ && $field ne 'any') {
2080: return 1;
2081: }
2082: else {
2083: return 0;
2084: }
2085: }
2086:
2087: ######################################################################
2088: ######################################################################
2089:
2090: =pod
2091:
2092: =item &output_blank_field_error()
2093:
2094: =cut
2095:
2096: ######################################################################
2097: ######################################################################
2098: sub output_blank_field_error {
2099: my ($r)=@_;
2100: # make query information persistent to allow for subsequent revision
2101: my $persistent=&make_persistent(\%ENV);
2102:
2103: $r->print(<<BEGINNING);
2104: <html>
2105: <head>
2106: <title>The LearningOnline Network with CAPA</title>
2107: BEGINNING
2108: $r->print(<<RESULTS);
2109: </head>
2110: <body bgcolor="#ffffff">
2111: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2112: <h1>Search Catalog</h1>
2113: <form method="post" action="/adm/searchcat">
2114: $persistent
2115: <input type='button' value='Revise search request'
2116: onClick='this.form.submit();' />
2117: $closebutton
2118: <hr />
2119: <h3>Helpful Message</h3>
2120: <p>
2121: Incorrect search query due to blank entry fields.
2122: You need to fill in the relevant
2123: fields on the search page in order for a query to be
2124: processed.
2125: </p>
2126: </body>
2127: </html>
2128: RESULTS
2129: }
2130:
2131: ######################################################################
2132: ######################################################################
2133:
2134: =pod
2135:
2136: =item &output_date_error()
2137:
2138: Output a full html page with an error message.
2139:
2140: =cut
2141:
2142: ######################################################################
2143: ######################################################################
2144: sub output_date_error {
2145: my ($r,$message)=@_;
2146: # make query information persistent to allow for subsequent revision
2147: my $persistent=&make_persistent(\%ENV);
2148:
2149: $r->print(<<RESULTS);
2150: <html>
2151: <head>
2152: <title>The LearningOnline Network with CAPA</title>
2153: </head>
2154: <body bgcolor="#ffffff">
2155: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
2156: <h1>Search Catalog</h1>
2157: <form method="post" action="/adm/searchcat">
2158: $persistent
2159: <input type='button' value='Revise search request'
2160: onClick='this.form.submit();' />
2161: $closebutton
2162: <hr />
2163: <h3>Helpful Message</h3>
2164: <p>
2165: $message
2166: </p>
2167: </body>
2168: </html>
2169: RESULTS
2170: }
2171:
2172: ######################################################################
2173: ######################################################################
2174:
2175: =pod
2176:
2177: =item &start_fresh_session()
2178:
2179: Cleans the global %groupsearch_db by removing all fields which begin with
2180: 'pre_' or 'store'.
2181:
2182: =cut
2183:
2184: ######################################################################
2185: ######################################################################
2186: sub start_fresh_session {
2187: delete $groupsearch_db{'mode_catalog'};
2188: foreach (keys %groupsearch_db) {
2189: if ($_ =~ /^pre_/) {
2190: delete $groupsearch_db{$_};
2191: }
2192: if ($_ =~ /^store/) {
2193: delete $groupsearch_db{$_};
2194: }
2195: }
2196: }
2197:
2198: ######################################################################
2199: ######################################################################
2200:
2201: =pod
2202:
2203: =item &popwin_js() send javascript to popwin
2204:
2205: =cut
2206:
2207: ######################################################################
2208: ######################################################################
2209: sub popwin_js {
2210: # Print javascript out to popwin, but make sure we dont generate
2211: # any javascript errors in doing so.
2212: my ($r,$text) = @_;
2213: $r->print(<<"END");
2214: <script type="text/javascript">
2215: if (! popwin.closed) {
2216: $text
2217: }
2218: </script>
2219: END
2220: $r->rflush();
2221: }
2222:
2223: ######################################################################
2224: ######################################################################
2225:
2226: =pod
2227:
2228: =item &popwin_imgupdate()
2229:
2230: Send a given image (and its location) out to the browser. Takes as
2231: input $r, loncapa server id, and an icon URL.
2232:
2233: =cut
2234:
2235: ######################################################################
2236: ######################################################################
2237: sub popwin_imgupdate {
2238: my ($r,$server,$icon) = @_;
2239: &popwin_js($r,'popwin.document.img_'.$Apache::lonnet::hostdom{$server}.
2240: '_'.$server.'.'.'src="/adm/lonIcons/'.$icon.'";');
2241: }
2242:
2243: 1;
2244:
2245: __END__
2246:
2247: =pod
2248:
2249: =back
2250:
2251: =cut
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