1: # The LearningOnline Network with CAPA
2: # Search Catalog
3: #
4: # $Id: lonsearchcat.pm,v 1.136 2002/07/05 18:56:52 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
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 %hash
113:
114: The ubiquitous database hash
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: =back
122:
123: =cut
124:
125: ######################################################################
126: ######################################################################
127:
128: # -- dynamically rendered interface components
129: my $closebutton; # button that closes the search window
130: my $importbutton; # button to take the selected results and go to group sorting
131:
132: # -- miscellaneous variables
133: my %hash; # database hash
134: my $diropendb = ""; # db file
135:
136: ######################################################################
137: ######################################################################
138:
139: =pod
140:
141: =item &handler() - main handler invoked by httpd child
142:
143: =item Variables
144:
145: =over 4
146:
147: =item $hidden
148:
149: holds 'hidden' html forms
150:
151: =item $scrout
152:
153: string that holds portions of the screen output
154:
155: =back
156:
157: =cut
158:
159: ######################################################################
160: ######################################################################
161: sub handler {
162: my $r = shift;
163: untie %hash;
164:
165: $r->content_type('text/html');
166: $r->send_http_header;
167: return OK if $r->header_only;
168:
169: my $domain = $r->dir_config('lonDefDomain');
170: $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
171: "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
172:
173: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
174: ['catalogmode','launch','acts','mode','form','element',
175: 'reqinterface']);
176: ##
177: ## Clear out old values from database
178: ##
179: if ($ENV{'form.launch'} eq '1') {
180: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
181: &start_fresh_session();
182: untie %hash;
183: } else {
184: $r->print('<html><head></head><body>Unable to tie hash to db '.
185: 'file</body></html>');
186: return OK;
187: }
188: }
189: ##
190: ## Produce some output, so people know it is working
191: ##
192: $r->print("\n");
193: $r->rflush;
194: ##
195: ## Configure dynamic components of interface
196: ##
197: my $hidden; # Holds 'hidden' html forms
198: if ($ENV{'form.catalogmode'} eq 'interactive') {
199: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
200: "\n";
201: $closebutton="<input type='button' name='close' value='CLOSE' ".
202: "onClick='self.close()'>"."\n";
203: } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
204: $hidden=<<END;
205: <input type='hidden' name='catalogmode' value='groupsearch'>
206: END
207: $closebutton=<<END;
208: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
209: END
210: $importbutton=<<END;
211: <input type='button' name='import' value='IMPORT'
212: onClick='javascript:select_group()'>
213: END
214: }
215: $hidden .= &make_persistent({ "form.mode" => $ENV{'form.mode'},
216: "form.form" => $ENV{'form.form'},
217: "form.element" => $ENV{'form.element'},
218: "form.date" => 2 });
219: ##
220: ## What are we doing?
221: ##
222: my $searchtype;
223: $searchtype = 'Basic' if ($ENV{'form.basicsubmit'} eq 'SEARCH');
224: $searchtype = 'Advanced' if ($ENV{'form.advancedsubmit'} eq 'SEARCH');
225: if ($searchtype) {
226: my ($query,$customquery,$customshow,$libraries) =
227: (undef,undef,undef,undef);
228: if ($searchtype eq 'Basic') {
229: $query = &parse_basic_search($r);
230: } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
231: ($query,$customquery,$customshow,$libraries)
232: = &parse_advanced_search($r);
233: return OK if (! defined($query));
234: }
235: # Send query statements over the network to be processed by
236: # either the SQL database or a recursive scheme of 'grep'-like
237: # actions (for custom metadata).
238: $r->rflush();
239: my $reply=&Apache::lonnet::metadata_query($query,$customquery,
240: $customshow,$libraries);
241: &output_results($searchtype,$r,$reply,$hidden);
242: } elsif ($ENV{'form.reqinterface'} eq 'advanced') {
243: # Output the advanced interface
244: $r->print(&advanced_search_form($closebutton,$hidden));
245: } else {
246: # Output normal search interface
247: $r->print(&basic_search_form($closebutton,$hidden));
248: }
249: return OK;
250: }
251:
252: ######################################################################
253: ######################################################################
254:
255: =pod
256:
257: =item &basic_search_form()
258:
259: Returns a scalar which holds html for the basic search form.
260:
261: =cut
262:
263: ######################################################################
264: ######################################################################
265:
266: sub basic_search_form{
267: my ($closebutton,$hidden) = @_;
268: my $scrout=<<"ENDDOCUMENT";
269: <html>
270: <head>
271: <title>The LearningOnline Network with CAPA</title>
272: <script type="text/javascript">
273: function openhelp(val) {
274: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
275: 'scrollbars=1,width=600,height=300');
276: openhelpwin.focus();
277: }
278: </script>
279: </head>
280: <body bgcolor="#FFFFFF">
281: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
282: <h1>Search Catalog</h1>
283: <form method="post" action="/adm/searchcat">
284: $hidden
285: <h3>Basic Search</h3>
286: <p>
287: Enter terms or phrases separated by AND, OR, or NOT
288: then press SEARCH below.
289: </p>
290: <p>
291: <table>
292: <tr><td>
293: ENDDOCUMENT
294: $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
295: ' ';
296: # $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'});
297: # $scrout.='<font color="#800000">Search historic archives</font>';
298: $scrout.=<<ENDDOCUMENT;
299: </td><td><a href="/adm/searchcat?reqinterface=advanced">Advanced Search</a></td></tr></table>
300: </p>
301: <p>
302: <input type="submit" name="basicsubmit" value='SEARCH' />
303: $closebutton
304: <!-- view selection -->
305: <select name="viewselect">
306: <option value="Detailed Citation View" selected="true" >Detailed Citation View</option>
307: <option value="Summary View" >Summary View</option>
308: <option value="Fielded Format">Fielded Format</option>
309: <option value="XML/SGML" >XML/SGML</option>
310: </select>
311: <!-- end of view selection -->
312: <input type="button" value="HELP" onClick="openhelp()" />
313: </p>
314: </form>
315: </body>
316: </html>
317: ENDDOCUMENT
318: return $scrout;
319: }
320: ######################################################################
321: ######################################################################
322:
323: =pod
324:
325: =item &advanced_search_form()
326:
327: Returns a scalar which holds html for the advanced search form.
328:
329: =cut
330:
331: ######################################################################
332: ######################################################################
333:
334: sub advanced_search_form{
335: my ($closebutton,$hidden) = @_;
336: my $advanced_buttons = <<"END";
337: <p>
338: <input type="submit" name="advancedsubmit" value='SEARCH' />
339: <input type="reset" name="reset" value='RESET' />
340: $closebutton
341: <input type="button" value="HELP" onClick="openhelp()" />
342: </p>
343: END
344: my $scrout=<<"ENDHEADER";
345: <html>
346: <head>
347: <title>The LearningOnline Network with CAPA</title>
348: <script type="text/javascript">
349: function openhelp(val) {
350: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
351: 'scrollbars=1,width=600,height=300');
352: openhelpwin.focus();
353: }
354: </script>
355: </head>
356: <body bgcolor="#FFFFFF">
357: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
358: <h1>Advanced Catalog Search</h1>
359: <hr />
360: Enter terms or phrases separated by search operators
361: such as AND, OR, or NOT.<br />
362: <form method="post" action="/adm/searchcat">
363: $advanced_buttons
364: $hidden
365: <table>
366: <tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
367: <td>
368: <!-- view selection -->
369: <select name="viewselect" size ="1">
370: <option value="Detailed Citation View" selected="true">Detailed Citation View</option>
371: <option value="Summary View">Summary View</option>
372: <option value="Fielded Format">Fielded Format</option>
373: <option value="XML/SGML">XML/SGML</option>
374: </select>
375: <!-- end of view selection -->
376: </td></tr>
377: ENDHEADER
378: $scrout.=&searchphrasefield('title', 'title' ,$ENV{'form.title'});
379: $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'});
380: $scrout.=&searchphrasefield('subject', 'subject' ,$ENV{'form.subject'});
381: $scrout.=&searchphrasefield('keywords','keywords',$ENV{'form.keywords'});
382: $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'});
383: $scrout.=&searchphrasefield('notes', 'notes' ,$ENV{'form.notes'});
384: $scrout.=&searchphrasefield('abstract','abstract',$ENV{'form.abstract'});
385: # Hack - an empty table row.
386: $scrout.="<tr><td> </td><td> </td></tr>\n";
387: $scrout.=&searchphrasefield('file<br />extension','mime',
388: $ENV{'form.mime'});
389: $scrout.="<tr><td> </td><td> </td></tr>\n";
390: $scrout.=&searchphrasefield('publisher<br />owner','owner',
391: $ENV{'form.owner'});
392: $scrout.="</table>\n";
393: $ENV{'form.category'}='any' unless length($ENV{'form.category'});
394: $scrout.=&selectbox('File Category','category',
395: $ENV{'form.category'},
396: 'any','Any category',
397: undef,
398: (&Apache::loncommon::filecategories()));
399: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
400: #----------------------------------------------------------------
401: # Allow restriction to multiple domains.
402: # I make the crazy assumption that there will never be a domain 'any'.
403: #
404: $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
405: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
406: : ($ENV{'form.domains'}) );
407: my %domain_hash = ();
408: foreach (@allowed_domains) {
409: $domain_hash{$_}++;
410: }
411: my @domains =&Apache::loncommon::get_domains();
412: # adjust the size of the select box
413: my $size = 4;
414: my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
415: # standalone machines do not get to choose a domain to search.
416: if ((scalar @domains) == 1) {
417: $scrout .='<input type="hidden" name="domains" value="any" />'."\n";
418: } else {
419: $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
420: 'DOMAINS</b></font><br />'.
421: '<select name="domains" size="'.$size.'" multiple>'."\n".
422: '<option name="any" value="any" '.
423: ($domain_hash{'any'}? 'selected ' :'').
424: '>all domains</option>'."\n";
425: foreach my $dom (sort @domains) {
426: $scrout.="<option name=\"$dom\" ".
427: ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
428: }
429: $scrout.="</select>\n";
430: }
431: #----------------------------------------------------------------
432: $scrout.=&selectbox('Limit by language','language',
433: $ENV{'form.language'},'any','Any Language',
434: \&{Apache::loncommon::languagedescription},
435: (&Apache::loncommon::languageids),
436: );
437: # ------------------------------------------------ Compute date selection boxes
438: $scrout.=<<CREATIONDATESTART;
439: <p>
440: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
441: </font>
442: <br />
443: between:
444: CREATIONDATESTART
445: $scrout.=&dateboxes('creationdatestart',1,1,1976,
446: $ENV{'form.creationdatestart_month'},
447: $ENV{'form.creationdatestart_day'},
448: $ENV{'form.creationdatestart_year'},
449: );
450: $scrout.="and:\n";
451: $scrout.=&dateboxes('creationdateend',12,31,2051,
452: $ENV{'form.creationdateend_month'},
453: $ENV{'form.creationdateend_day'},
454: $ENV{'form.creationdateend_year'},
455: );
456: $scrout.="</p>";
457: $scrout.=<<LASTREVISIONDATESTART;
458: <p>
459: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
460: </b></font>
461: <br />between:
462: LASTREVISIONDATESTART
463: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
464: $ENV{'form.lastrevisiondatestart_month'},
465: $ENV{'form.lastrevisiondatestart_day'},
466: $ENV{'form.lastrevisiondatestart_year'},
467: );
468: $scrout.=<<LASTREVISIONDATEEND;
469: and:
470: LASTREVISIONDATEEND
471: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
472: $ENV{'form.lastrevisiondateend_month'},
473: $ENV{'form.lastrevisiondateend_day'},
474: $ENV{'form.lastrevisiondateend_year'},
475: );
476: $scrout.='</p>';
477: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
478: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
479: $ENV{'form.copyright'},
480: 'any','Any copyright/distribution',
481: \&{Apache::loncommon::copyrightdescription},
482: (&Apache::loncommon::copyrightids),
483: );
484: # ------------------------------------------- Compute customized metadata field
485: $scrout.=<<CUSTOMMETADATA;
486: <p>
487: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
488: </font>
489: For resource-specific metadata, enter in an expression in the form of
490: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
491: <b>Example:</b> grandmother=75 OR grandfather=85
492: <br />
493: CUSTOMMETADATA
494: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
495: $scrout.=<<CUSTOMSHOW;
496: <p>
497: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
498: </font>
499: Enter in a space-separated list of special metadata fields to show
500: in a fielded listing for each record result.
501: <br />
502: CUSTOMSHOW
503: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
504: $scrout.=<<ENDDOCUMENT;
505: $advanced_buttons
506: </form>
507: </body>
508: </html>
509: ENDDOCUMENT
510: return $scrout;
511: }
512:
513: ######################################################################
514: ######################################################################
515:
516: =pod
517:
518: =item &make_persistent()
519:
520: Returns a scalar which holds the current ENV{'form.*'} values in
521: a 'hidden' html input tag. This allows search interface information
522: to be somewhat persistent.
523:
524: =cut
525:
526: ######################################################################
527: ######################################################################
528:
529: sub make_persistent {
530: my %save = %{shift()};
531: my $persistent='';
532: foreach (keys %save) {
533: if (/^form\./ && !/submit/) {
534: my $name=$_;
535: my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
536: $name=~s/^form\.//;
537: foreach (@values) {
538: s/\"/\'/g; # do not mess with html field syntax
539: $persistent.=<<END;
540: <input type="hidden" name="$name" value="$_" />
541: END
542: }
543: }
544: }
545: return $persistent;
546: }
547:
548:
549: ######################################################################
550: ######################################################################
551:
552: =pod
553:
554: =item HTML form building functions
555:
556: =over 4
557:
558: =item &simpletextfield()
559:
560: Inputs: $name,$value,$size
561:
562: Returns a text input field with the given name, value, and size.
563: If size is not specified, a value of 20 is used.
564:
565: =item &simplecheckbox()
566:
567: Inputs: $name,$value
568:
569: Returns a simple check box with the given $name.
570: If $value eq 'on' the box is checked.
571:
572: =item &searchphrasefield()
573:
574: Inputs: $title,$name,$value
575:
576: Returns html for a title line and an input field for entering search terms.
577: the instructions "Enter terms or phrases separated by search operators such
578: as AND, OR, or NOT." are given following the title. The entry field (which
579: is where the $name and $value are used) is an 80 column simpletextfield.
580:
581: =item &dateboxes()
582:
583: Returns html selection form elements for the specification of
584: the day, month, and year.
585:
586: =item &selectbox()
587:
588: Returns a scalar containing an html <select> form.
589:
590: Inputs:
591:
592: =over 4
593:
594: =item $title
595:
596: Printed above the select box, in uppercase.
597:
598: =item $name
599:
600: The name element of the <select> tag.
601:
602: =item $default
603:
604: The default value of the form. Can be $anyvalue or in @idlist.
605:
606: =item $anyvalue
607:
608: The <option value="..."> used to indicate a default of
609: none of the values.
610:
611: =item $anytag
612:
613: The text associate with $anyvalue above.
614:
615: =item $functionref
616:
617: Each element in @idlist will be passed as a parameter
618: to the function referenced here. The return value of the function should
619: be a scalar description of the items. If this value is undefined the
620: description of each item in @idlist will be the item name.
621:
622: =item @idlist
623:
624: The items to be selected from. One of these or $anyvalue will be the
625: value returned by the form element, $ENV{form.$name}.
626:
627: =back
628:
629: =back
630:
631: =cut
632:
633: ######################################################################
634: ######################################################################
635:
636: sub simpletextfield {
637: my ($name,$value,$size)=@_;
638: $size = 20 if (! defined($size));
639: return '<input type="text" name="'.$name.
640: '" size="'.$size.'" value="'.$value.'" />';
641: }
642:
643: sub simplecheckbox {
644: my ($name,$value)=@_;
645: my $checked='';
646: $checked="checked" if $value eq 'on';
647: return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
648: }
649:
650: sub searchphrasefield {
651: my ($title,$name,$value)=@_;
652: my $uctitle=uc($title);
653: return '<tr><td><font color="#800000" face="helvetica">'.
654: '<b>'.$uctitle.': </b></font></td><td>'.
655: &simpletextfield($name,$value,50)."</td></tr>\n";
656: }
657:
658: sub dateboxes {
659: my ($name,$defaultmonth,$defaultday,$defaultyear,
660: $currentmonth,$currentday,$currentyear)=@_;
661: ($defaultmonth,$defaultday,$defaultyear)=('','','');
662: #
663: # Day
664: my $day=<<END;
665: <select name="${name}_day">
666: <option value='$defaultday'> </option>
667: END
668: for (my $i = 1; $i<=31; $i++) {
669: $day.="<option value=\"$i\">$i</option>\n";
670: }
671: $day.="</select>\n";
672: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
673: #
674: # Month
675: my $month=<<END;
676: <select name="${name}_month">
677: <option value='$defaultmonth'> </option>
678: END
679: my $i = 1;
680: foreach (qw/January February March April May June
681: July August September October November December /){
682: $month .="<option value=\"$i\">$_</option>\n";
683: $i++;
684: }
685: $month.="</select>\n";
686: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
687: #
688: # Year (obviously)
689: my $year=<<END;
690: <select name="${name}_year">
691: <option value='$defaultyear'> </option>
692: END
693: my $maxyear = 2051;
694: for (my $i = 1976; $i<=$maxyear; $i++) {
695: $year.="<option value=\"$i\">$i</option>\n";
696: }
697: $year.="</select>\n";
698: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
699: return "$month$day$year";
700: }
701:
702: sub selectbox {
703: my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
704: if (! defined($functionref)) { $functionref = sub { $_[0]}; }
705: my $uctitle=uc($title);
706: my $selout="\n".'<p><font color="#800000" face="helvetica">'.
707: '<b>'.$uctitle.': </b></font><select name="'.$name.'">';
708: foreach ($anyvalue,@idlist) {
709: $selout.='<option value="'.$_.'"';
710: if ($_ eq $default and !/^any$/) {
711: $selout.=' selected >'.&{$functionref}($_).'</option>';
712: }
713: elsif ($_ eq $default and /^$anyvalue$/) {
714: $selout.=' selected >'.$anytag.'</option>';
715: }
716: else {$selout.='>'.&{$functionref}($_).'</option>';}
717: }
718: return $selout.'</select></p>';
719: }
720:
721: ######################################################################
722: ######################################################################
723:
724: =pod
725:
726: =item &parse_advanced_search()
727:
728: Parse advanced search form and return the following:
729:
730: =over 4
731:
732: =item $query Scalar containing an SQL query.
733:
734: =item $customquery Scalar containing a custom query.
735:
736: =item $customshow Scalar containing commands to show custom metadata.
737:
738: =item $libraries_to_query Reference to array of domains to search.
739:
740: =back
741:
742: =cut
743:
744: ######################################################################
745: ######################################################################
746: sub parse_advanced_search {
747: my ($r)=@_;
748: my $fillflag=0;
749: # Clean up fields for safety
750: for my $field ('title','author','subject','keywords','url','version',
751: 'creationdatestart_month','creationdatestart_day',
752: 'creationdatestart_year','creationdateend_month',
753: 'creationdateend_day','creationdateend_year',
754: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
755: 'lastrevisiondatestart_year','lastrevisiondateend_month',
756: 'lastrevisiondateend_day','lastrevisiondateend_year',
757: 'notes','abstract','mime','language','owner',
758: 'custommetadata','customshow','category') {
759: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
760: }
761: foreach ('mode','form','element') {
762: # is this required? Hmmm.
763: next unless (exists($ENV{"form.$_"}));
764: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
765: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
766: }
767: # Preprocess the category form element.
768: if ($ENV{'form.category'} ne 'any') {
769: my @extensions = &Apache::loncommon::filecategorytypes
770: ($ENV{'form.category'});
771: $ENV{'form.mime'} = join ' OR ',@extensions;
772: }
773: # Check to see if enough information was filled in
774: for my $field ('title','author','subject','keywords','url','version',
775: 'notes','abstract','mime','language','owner',
776: 'custommetadata') {
777: if (&filled($ENV{"form.$field"})) {
778: $fillflag++;
779: }
780: }
781: unless ($fillflag) {
782: &output_blank_field_error($r);
783: return ;
784: }
785: # Turn the form input into a SQL-based query
786: my $query='';
787: my @queries;
788: # Evaluate logical expression AND/OR/NOT phrase fields.
789: foreach my $field ('title','author','subject','notes','abstract','url',
790: 'keywords','version','owner','mime') {
791: if ($ENV{'form.'.$field}) {
792: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
793: }
794: }
795: # I dislike the hack below.
796: if ($ENV{'form.category'}) {
797: $ENV{'form.mime'}='';
798: }
799: # Evaluate option lists
800: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
801: push @queries,"(language like \"$ENV{'form.language'}\")";
802: }
803: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
804: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
805: }
806: # Evaluate date windows
807: my $datequery=&build_date_queries(
808: $ENV{'form.creationdatestart_month'},
809: $ENV{'form.creationdatestart_day'},
810: $ENV{'form.creationdatestart_year'},
811: $ENV{'form.creationdateend_month'},
812: $ENV{'form.creationdateend_day'},
813: $ENV{'form.creationdateend_year'},
814: $ENV{'form.lastrevisiondatestart_month'},
815: $ENV{'form.lastrevisiondatestart_day'},
816: $ENV{'form.lastrevisiondatestart_year'},
817: $ENV{'form.lastrevisiondateend_month'},
818: $ENV{'form.lastrevisiondateend_day'},
819: $ENV{'form.lastrevisiondateend_year'},
820: );
821: # Test to see if date windows are legitimate
822: if ($datequery=~/^Incorrect/) {
823: &output_date_error($r,$datequery);
824: return ;
825: }
826: elsif ($datequery) {
827: push @queries,$datequery;
828: }
829: # Process form information for custom metadata querying
830: my $customquery=undef;
831: if ($ENV{'form.custommetadata'}) {
832: $customquery=&build_custommetadata_query('custommetadata',
833: $ENV{'form.custommetadata'});
834: }
835: my $customshow=undef;
836: if ($ENV{'form.customshow'}) {
837: $customshow=$ENV{'form.customshow'};
838: $customshow=~s/[^\w\s]//g;
839: my @fields=split(/\s+/,$customshow);
840: $customshow=join(" ",@fields);
841: }
842: ## ---------------------------------------------------------------
843: ## Deal with restrictions to given domains
844: ##
845: my $libraries_to_query = undef;
846: # $ENV{'form.domains'} can be either a scalar or an array reference.
847: # We need an array.
848: my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}}
849: : ($ENV{'form.domains'}) );
850: my %domain_hash = ();
851: foreach (@allowed_domains) {
852: $domain_hash{$_}++;
853: }
854: foreach (keys(%Apache::lonnet::libserv)) {
855: if ($_ eq 'any') {
856: $libraries_to_query = undef;
857: last;
858: }
859: if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
860: push @$libraries_to_query,$_;
861: }
862: }
863: #
864: if (@queries) {
865: $query=join(" AND ",@queries);
866: $query="select * from metadata where $query";
867: } elsif ($customquery) {
868: $query = '';
869: }
870: return ($query,$customquery,$customshow,$libraries_to_query);
871: }
872:
873: ######################################################################
874: ######################################################################
875:
876: =pod
877:
878: =item &parse_basic_search()
879:
880: Parse the basic search form and return a scalar containing an sql query.
881:
882: =cut
883:
884: ######################################################################
885: ######################################################################
886: sub parse_basic_search {
887: my ($r)=@_;
888: # Clean up fields for safety
889: for my $field ('basicexp') {
890: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
891: }
892: foreach ('mode','form','element') {
893: # is this required? Hmmm.
894: next unless (exists($ENV{"form.$_"}));
895: $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
896: $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
897: }
898:
899: # Check to see if enough is filled in
900: unless (&filled($ENV{'form.basicexp'})) {
901: &output_blank_field_error($r);
902: return OK;
903: }
904:
905: # Build SQL query string based on form page
906: my $query='';
907: my $concatarg=join('," ",',
908: ('title', 'author', 'subject', 'notes', 'abstract',
909: 'keywords'));
910: $concatarg='title' if $ENV{'form.titleonly'};
911:
912: $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
913: return 'select * from metadata where '.$query;
914: }
915:
916:
917: ######################################################################
918: ######################################################################
919:
920: =pod
921:
922: =item &build_SQL_query()
923:
924: Builds a SQL query string from a logical expression with AND/OR keywords
925: using Text::Query and &recursive_SQL_query_builder()
926:
927: =cut
928:
929: ######################################################################
930: ######################################################################
931: sub build_SQL_query {
932: my ($field_name,$logic_statement)=@_;
933: my $q=new Text::Query('abc',
934: -parse => 'Text::Query::ParseAdvanced',
935: -build => 'Text::Query::Build');
936: $q->prepare($logic_statement);
937: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
938: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
939: return $sql_query;
940: }
941:
942: ######################################################################
943: ######################################################################
944:
945: =pod
946:
947: =item &build_custommetadata_query()
948:
949: Constructs a custom metadata query using a rather heinous regular
950: expression.
951:
952: =cut
953:
954: ######################################################################
955: ######################################################################
956: sub build_custommetadata_query {
957: my ($field_name,$logic_statement)=@_;
958: my $q=new Text::Query('abc',
959: -parse => 'Text::Query::ParseAdvanced',
960: -build => 'Text::Query::BuildAdvancedString');
961: $q->prepare($logic_statement);
962: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
963: # quick fix to change literal into xml tag-matching
964: # will eventually have to write a separate builder module
965: # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
966: $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
967: /\\<$1\\>?# \<wordone\>
968: \[\^\\<\]?# [^\<]
969: \*$2\[\^\\<\]?# *wordtwo[^\<]
970: \*\\<\\\/$1\\>?# *\<\/wordone\>
971: /g;
972: return $matchexp;
973: }
974:
975: ######################################################################
976: ######################################################################
977:
978: =pod
979:
980: =item &recursive_SQL_query_build()
981:
982: Recursively constructs an SQL query. Takes as input $dkey and $pattern.
983:
984: =cut
985:
986: ######################################################################
987: ######################################################################
988: sub recursive_SQL_query_build {
989: my ($dkey,$pattern)=@_;
990: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
991: return $pattern unless @matches;
992: foreach my $match (@matches) {
993: $match=~/\[ (\w+)\s(.*) \]/;
994: my ($key,$value)=($1,$2);
995: my $replacement='';
996: if ($key eq 'literal') {
997: $replacement="($dkey like \"\%$value\%\")";
998: }
999: elsif ($key eq 'not') {
1000: $value=~s/like/not like/;
1001: # $replacement="($dkey not like $value)";
1002: $replacement="$value";
1003: }
1004: elsif ($key eq 'and') {
1005: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1006: $replacement="($1 AND $2)";
1007: }
1008: elsif ($key eq 'or') {
1009: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
1010: $replacement="($1 OR $2)";
1011: }
1012: substr($pattern,
1013: index($pattern,$match),
1014: length($match),
1015: $replacement
1016: );
1017: }
1018: &recursive_SQL_query_build($dkey,$pattern);
1019: }
1020:
1021: ######################################################################
1022: ######################################################################
1023:
1024: =pod
1025:
1026: =item &build_date_queries()
1027:
1028: Builds a SQL logic query to check time/date entries.
1029: Also reports errors (check for /^Incorrect/).
1030:
1031: =cut
1032:
1033: ######################################################################
1034: ######################################################################
1035: sub build_date_queries {
1036: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
1037: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
1038: my @queries;
1039: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
1040: unless ($cmonth1 and $cday1 and $cyear1 and
1041: $cmonth2 and $cday2 and $cyear2) {
1042: return "Incorrect entry for the creation date. You must specify ".
1043: "a starting month, day, and year and an ending month, ".
1044: "day, and year.";
1045: }
1046: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
1047: $cnumeric1+=0;
1048: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
1049: $cnumeric2+=0;
1050: if ($cnumeric1>$cnumeric2) {
1051: return "Incorrect entry for the creation date. The starting ".
1052: "date must occur before the ending date.";
1053: }
1054: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
1055: "$cyear2-$cmonth2-$cday2 23:59:59')";
1056: push @queries,$cquery;
1057: }
1058: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
1059: unless ($lmonth1 and $lday1 and $lyear1 and
1060: $lmonth2 and $lday2 and $lyear2) {
1061: return "Incorrect entry for the last revision date. You must ".
1062: "specify a starting month, day, and year and an ending ".
1063: "month, day, and year.";
1064: }
1065: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1066: $lnumeric1+=0;
1067: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1068: $lnumeric2+=0;
1069: if ($lnumeric1>$lnumeric2) {
1070: return "Incorrect entry for the last revision date. The ".
1071: "starting date must occur before the ending date.";
1072: }
1073: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1074: "$lyear2-$lmonth2-$lday2 23:59:59')";
1075: push @queries,$lquery;
1076: }
1077: if (@queries) {
1078: return join(" AND ",@queries);
1079: }
1080: return '';
1081: }
1082:
1083: ######################################################################
1084: ######################################################################
1085:
1086: =pod
1087:
1088: =item &output_results()
1089:
1090: Format and output results based on a reply list.
1091: There are two windows that this function writes to. The main search
1092: window ("srch") has a listing of the results. A secondary window ("popwin")
1093: gives the status of the network search (time elapsed, number of machines
1094: contacted, etc.)
1095:
1096: =cut
1097:
1098: ######################################################################
1099: ######################################################################
1100: sub output_results {
1101: # &Apache::lonnet::logthis("output_results:".time);
1102: my $fnum; # search result counter
1103: my ($mode,$r,$replyref,$hidden)=@_;
1104: my %rhash=%{$replyref};
1105: my $compiledresult='';
1106: my $timeremain=300; # (seconds)
1107: my $elapsetime=0;
1108: my $resultflag=0;
1109: my $tflag=1;
1110: ##
1111: ## Set viewing function
1112: ##
1113: my $viewfunction = undef;
1114: if ($ENV{'form.viewselect'} eq 'Detailed Citation View') {
1115: $viewfunction = \&detailed_citation_view;
1116: } elsif ($ENV{'form.viewselect'} eq 'Summary View') {
1117: $viewfunction = \&summary_view;
1118: } elsif ($ENV{'form.viewselect'} eq 'Fielded Format') {
1119: $viewfunction = \&fielded_format_view;
1120: } elsif ($ENV{'form.viewselect'} eq 'XML/SGML') {
1121: $viewfunction = \&xml_sgml_view;
1122: }
1123: if (!defined($viewfunction)) {
1124: $r->print("Internal Error - Bad view selected.\n");
1125: $r->rflush();
1126: return;
1127: }
1128: #
1129: # make query information persistent to allow for subsequent revision
1130: my $persistent=&make_persistent(\%ENV);
1131: #
1132: # Begin producing output
1133: $r->print(&search_results_header($mode));
1134: $r->rflush();
1135: #
1136: # begin showing the cataloged results
1137: my $action = "/adm/searchcat";
1138: if ($mode eq 'Basic') {
1139: $action .= "?reqinterface=basic";
1140: } elsif ($mode eq 'Advanced') {
1141: $action .= "?reqinterface=advanced";
1142: }
1143: $r->print(<<CATALOGCONTROLS);
1144: <form name='results' method="post" action="$action">
1145: $hidden
1146: <input type='hidden' name='acts' value='' />
1147: <input type='button' value='Revise search request'
1148: onClick='this.form.submit();' />
1149: $importbutton
1150: $closebutton
1151: $persistent
1152: <hr />
1153: CATALOGCONTROLS
1154: #
1155: # make the pop-up window for status
1156: $r->print(&make_popwin(%rhash));
1157: $r->rflush();
1158: ##
1159: ## Prepare for the main loop below
1160: ##
1161: my $servercount=0;
1162: my $hitcountsum=0;
1163: my $servernum=(keys %rhash);
1164: my $serversleft=$servernum;
1165: ##
1166: ## Run until we run out of time or we run out of servers
1167: ##
1168: while($serversleft && $timeremain) {
1169: ##
1170: ## %rhash has servers deleted from it as results come in
1171: ## (within the foreach loop below).
1172: ##
1173: foreach my $rkey (sort keys %rhash) {
1174: # &Apache::lonnet::logthis("Server $rkey:".time);
1175: $servercount++;
1176: $compiledresult='';
1177: my $reply=$rhash{$rkey};
1178: my @results;
1179: if ($reply eq 'con_lost') {
1180: &popwin_imgupdate($r,$rkey,"srvbad.gif");
1181: $serversleft--;
1182: delete $rhash{$rkey};
1183: } else {
1184: # must do since 'use strict' checks for tainting
1185: $reply=~/^([\.\w]+)$/;
1186: my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1187: $reply=~/(.*?)\_/;
1188: for (my $counter=0;$counter<2;$counter++) {
1189: if (-e $replyfile && ! -e "$replyfile.end") {
1190: &popwin_imgupdate($r,$rkey,"srvhalf.gif");
1191: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1192: '"still transferring..."'.';');
1193: }
1194: # Are we finished transferring data?
1195: if (-e "$replyfile.end") {
1196: $serversleft--;
1197: delete $rhash{$rkey};
1198: if (-s $replyfile) {
1199: &popwin_imgupdate($r,$rkey,"srvgood.gif");
1200: my $fh;
1201: unless ($fh=Apache::File->new($replyfile)){
1202: # Is it really appropriate to die on this error?
1203: $r->print('ERROR: file '.
1204: $replyfile.' cannot be opened');
1205: return OK;
1206: }
1207: @results=<$fh> if $fh;
1208: my $hits =@results;
1209: &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
1210: $hits.';');
1211: $hitcountsum+=$hits;
1212: &popwin_js($r,'popwin.document.forms.popremain.'.
1213: 'numhits.value='.$hitcountsum.';');
1214: } else {
1215: &popwin_imgupdate($r,$rkey,"srvempty.gif");
1216: &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
1217: }
1218: last;
1219: } # end of if ( -e "$replyfile.end")
1220: last unless $timeremain;
1221: sleep 1; # wait for daemons to write files?
1222: $timeremain--;
1223: $elapsetime++;
1224: &popwin_js($r,"popwin.document.popremain.".
1225: "elapsetime.value=$elapsetime;");
1226: }
1227: &popwin_js($r,'popwin.document.whirly.'.
1228: 'src="/adm/lonIcons/lonanimend.gif";');
1229: } # end of if ($reply eq 'con_lost') else statement
1230: my %Fields = undef; # Holds the data to be sent to the various
1231: # *_view routines.
1232: my ($extrashow,$customfields,$customhash) =
1233: &handle_custom_fields(\@results);
1234: my @customfields = @$customfields;
1235: my %customhash = %$customhash;
1236: untie %hash if (keys %hash);
1237: #
1238: if (! tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1239: $r->print('<html><head></head><body>Unable to tie hash to db '.
1240: 'file</body></html>');
1241: } else {
1242: if ($ENV{'form.launch'} eq '1') {
1243: &start_fresh_session();
1244: }
1245: foreach my $result (@results) {
1246: next if $result=~/^custom\=/;
1247: chomp $result;
1248: next unless $result;
1249: %Fields = &parse_raw_result($result,$rkey);
1250: $Fields{'extrashow'}=$extrashow;
1251: if ($extrashow) {
1252: foreach my $field (@customfields) {
1253: my $value='';
1254: $value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s);
1255: $Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g;
1256: }
1257: }
1258: $compiledresult.="\n<p>\n";
1259: if ($ENV{'form.catalogmode'} eq 'interactive') {
1260: my $titleesc=$Fields{'title'};
1261: $titleesc=~s/\'/\\'/; # '
1262: $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');
1263: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1264: onClick="javascript:select_data('$titleesc','$Fields{'url'}')">
1265: </font>
1266: <br />
1267: END
1268: }
1269: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1270: $fnum+=0;
1271: $hash{"pre_${fnum}_link"}=$Fields{'url'};
1272: $hash{"pre_${fnum}_title"}=$Fields{'title'};
1273: $compiledresult.=<<END;
1274: <font size='-1'>
1275: <input type="checkbox" name="returnvalues" value="SELECT"
1276: onClick="javascript:queue($fnum)" />
1277: </font>
1278: <br />
1279: END
1280: # <input type="hidden" name="title$fnum" value="$title" />
1281: # <input type="hidden" name="url$fnum" value="$url" />
1282: $fnum++;
1283: }
1284: # Render the result into html
1285: $compiledresult.= &$viewfunction(%Fields, hostname => $rkey );
1286: if ($compiledresult or $servercount!=$servernum) {
1287: $compiledresult.="<hr align='left' width='200' noshade />";
1288: }
1289: }
1290: untie %hash;
1291: }
1292: if ($compiledresult) {
1293: $resultflag=1;
1294: $r->print($compiledresult);
1295: }
1296: } # End of foreach loop over servers remaining
1297: } # End of big loop - while($serversleft && $timeremain)
1298: unless ($resultflag) {
1299: $r->print("\nThere were no results that matched your query\n");
1300: }
1301: $r->print('<script type="text/javascript">'.'popwin.close()</script>'.
1302: "\n");
1303: $r->print("</body>\n</html>\n");
1304: $r->rflush();
1305: return;
1306: }
1307:
1308: ###########################################################
1309: ###########################################################
1310:
1311: =pod
1312:
1313: =item &parse_raw_result()
1314:
1315: Takes a line from the file of results and parse it. Returns a hash
1316: with keys for the following fields:
1317: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes',
1318: 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate',
1319: 'lastrevisiondate'.
1320:
1321: In addition, the following tags are set by calling the appropriate
1322: lonnet function: 'language', 'cprtag', 'mimetag'.
1323:
1324: The 'title' field is set to "Untitled" if the title field is blank.
1325:
1326: 'abstract' and 'keywords' are truncated to 200 characters.
1327:
1328: =cut
1329:
1330: ###########################################################
1331: ###########################################################
1332: sub parse_raw_result {
1333: my ($result,$hostname) = @_;
1334: # Check for a comma - if it is there then we do not need to unescape the
1335: # string. There seems to be some kind of problem with some items in
1336: # the database - the entire string gets sent out unescaped...?
1337: unless ($result =~ /,/) {
1338: $result = &Apache::lonnet::unescape($result);
1339: }
1340: my @fields=map {
1341: &Apache::lonnet::unescape($_);
1342: } (split(/\,/,$result));
1343: my ($title,$author,$subject,$url,$keywords,$version,
1344: $notes,$abstract,$mime,$lang,
1345: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1346: my %Fields =
1347: ( title => &Apache::lonnet::unescape($title),
1348: author => &Apache::lonnet::unescape($author),
1349: subject => &Apache::lonnet::unescape($subject),
1350: url => &Apache::lonnet::unescape($url),
1351: keywords => &Apache::lonnet::unescape($keywords),
1352: version => &Apache::lonnet::unescape($version),
1353: notes => &Apache::lonnet::unescape($notes),
1354: abstract => &Apache::lonnet::unescape($abstract),
1355: mime => &Apache::lonnet::unescape($mime),
1356: lang => &Apache::lonnet::unescape($lang),
1357: owner => &Apache::lonnet::unescape($owner),
1358: copyright => &Apache::lonnet::unescape($copyright),
1359: creationdate => &Apache::lonnet::unescape($creationdate),
1360: lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
1361: );
1362: $Fields{'language'} =
1363: &Apache::loncommon::languagedescription($Fields{'lang'});
1364: $Fields{'copyrighttag'} =
1365: &Apache::loncommon::copyrightdescription($Fields{'copyright'});
1366: $Fields{'mimetag'} =
1367: &Apache::loncommon::filedescription($Fields{'mime'});
1368: if ($Fields{'author'}=~/^(\s*|error)$/) {
1369: $Fields{'author'}="Unknown Author";
1370: }
1371: # Put spaces in the keyword list, if needed.
1372: $Fields{'keywords'}=~ s/,([A-z])/, $1/g;
1373: if ($Fields{'title'}=~ /^\s*$/ ) {
1374: $Fields{'title'}='Untitled';
1375: }
1376: unless ($ENV{'user.adv'}) {
1377: $Fields{'keywords'} = '- not displayed -';
1378: $Fields{'notes'} = '- not displayed -';
1379: $Fields{'abstract'} = '- not displayed -';
1380: $Fields{'subject'} = '- not displayed -';
1381: }
1382: if (length($Fields{'abstract'})>200) {
1383: $Fields{'abstract'} =
1384: substr($Fields{'abstract'},0,200).'...';
1385: }
1386: if (length($Fields{'keywords'})>200) {
1387: $Fields{'keywords'} =
1388: substr($Fields{'keywords'},0,200).'...';
1389: }
1390: return %Fields;
1391: }
1392:
1393: ###########################################################
1394: ###########################################################
1395:
1396: =pod
1397:
1398: =item &handle_custom_fields()
1399:
1400: =cut
1401:
1402: ###########################################################
1403: ###########################################################
1404: sub handle_custom_fields {
1405: my @results = @{shift()};
1406: my $customshow='';
1407: my $extrashow='';
1408: my @customfields;
1409: if ($ENV{'form.customshow'}) {
1410: $customshow=$ENV{'form.customshow'};
1411: $customshow=~s/[^\w\s]//g;
1412: my @fields=map {
1413: "<font color=\"#008000\">$_:</font><!-- $_ -->";
1414: } split(/\s+/,$customshow);
1415: @customfields=split(/\s+/,$customshow);
1416: if ($customshow) {
1417: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1418: }
1419: }
1420: my $customdata='';
1421: my %customhash;
1422: foreach my $result (@results) {
1423: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1424: my $tmp=$result;
1425: $tmp=~s/^custom\=//;
1426: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1427: } split(/\,/,$tmp);
1428: $customhash{$k}=$v;
1429: }
1430: }
1431: return ($extrashow,\@customfields,\%customhash);
1432: }
1433:
1434: ######################################################################
1435: ######################################################################
1436:
1437: =pod
1438:
1439: =item &search_results_header
1440:
1441: Output the proper html headers and javascript code to deal with different
1442: calling modes.
1443:
1444: Takes most inputs directly from %ENV, except $mode.
1445:
1446: =over 4
1447:
1448: =item $mode is either (at this writing) 'Basic' or 'Advanced'
1449:
1450: =back
1451:
1452: The following environment variables are checked:
1453:
1454: =over 4
1455:
1456: =item 'form.catalogmode'
1457:
1458: Checked for 'interactive' and 'groupsearch'.
1459:
1460: =item 'form.mode'
1461:
1462: Checked for existance & 'edit' mode.
1463:
1464: =item 'form.form'
1465:
1466: =item 'form.element'
1467:
1468: =back
1469:
1470: =cut
1471:
1472: ######################################################################
1473: ######################################################################
1474: sub search_results_header {
1475: my ($mode) = @_;
1476: $mode = lc($mode);
1477: my $title;
1478: if ($mode eq 'advanced') {
1479: $title = "Advanced Search Results";
1480: } elsif ($mode eq 'basic') {
1481: $title = "Basic Search Results";
1482: }
1483: my $result = '';
1484: # output beginning of search page
1485: $result.=<<BEGINNING;
1486: <html>
1487: <head>
1488: <title>$title</title>
1489: BEGINNING
1490: # conditional output of script functions dependent on the mode in
1491: # which the search was invoked
1492: if ($ENV{'form.catalogmode'} eq 'interactive'){
1493: if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
1494: $result.=<<SCRIPT;
1495: <script type="text/javascript">
1496: function select_data(title,url) {
1497: changeTitle(title);
1498: changeURL(url);
1499: self.close();
1500: }
1501: function changeTitle(val) {
1502: if (opener.inf.document.forms.resinfo.elements.t) {
1503: opener.inf.document.forms.resinfo.elements.t.value=val;
1504: }
1505: }
1506: function changeURL(val) {
1507: if (opener.inf.document.forms.resinfo.elements.u) {
1508: opener.inf.document.forms.resinfo.elements.u.value=val;
1509: }
1510: }
1511: </script>
1512: SCRIPT
1513: } elsif ($ENV{'form.mode'} eq 'edit') {
1514: my $form = $ENV{'form.form'};
1515: my $element = $ENV{'form.element'};
1516: $result.=<<SCRIPT;
1517: <script type="text/javascript">
1518: function select_data(title,url) {
1519: changeURL(url);
1520: self.close();
1521: }
1522: function changeTitle(val) {
1523: }
1524: function changeURL(val) {
1525: if (window.opener.document) {
1526: window.opener.document.forms["$form"].elements["$element"].value=val;
1527: } else {
1528: var url = 'forms[\"$form\"].elements[\"$element\"].value';
1529: alert("Unable to transfer data to "+url);
1530: }
1531: }
1532: </script>
1533: SCRIPT
1534: }
1535: }
1536: $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
1537: <script type="text/javascript">
1538: function select_data(title,url) {
1539: // alert('DEBUG: Should be storing '+title+' and '+url);
1540: }
1541: function queue(val) {
1542: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
1543: document.forms.results.acts.value+='1a'+val+'b';
1544: }
1545: else {
1546: document.forms.results.acts.value+='0a'+val+'b';
1547: }
1548: }
1549: function select_group() {
1550: window.location=
1551: "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
1552: document.forms.results.acts.value;
1553: }
1554: </script>
1555: SCRIPT
1556: $result.=<<SCRIPT;
1557: <script type="text/javascript">
1558: function displayinfo(val) {
1559: popwin.document.forms.popremain.sdetails.value=val;
1560: }
1561: function openhelp(val) {
1562: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
1563: 'scrollbars=1,width=400,height=300');
1564: openhelpwin.focus();
1565: }
1566: function abortsearch(val) {
1567: popwin.close();
1568: }
1569: </script>
1570: SCRIPT
1571: $result.=<<END;
1572: </head>
1573: <body bgcolor="#ffffff">
1574: <img align=right src=/adm/lonIcons/lonlogos.gif>
1575: <h1>$title</h1>
1576: END
1577: return $result;
1578: }
1579:
1580: ######################################################################
1581: ######################################################################
1582:
1583: =pod
1584:
1585: =item &make_popwin()
1586:
1587: Returns html with javascript in it to open up the status window.
1588:
1589: =cut
1590:
1591: ######################################################################
1592: ######################################################################
1593: sub make_popwin {
1594: my %rhash = @_;
1595: my $servernum=(keys %rhash);
1596: my $hcinit;
1597: my $grid="'<br />'+\n";
1598: # $sn is the server number, used ONLY to make sure we have
1599: # rows of 10 each. No longer used to index images.
1600: my $sn=1;
1601: foreach my $sk (sort keys %rhash) {
1602: $grid.="'<a href=\"";
1603: $grid.="javascript:opener.displayinfo('+";
1604: $grid.="\"'\"+'";
1605: $grid.=$sk;
1606: my $hc;
1607: if ($rhash{$sk} eq 'con_lost') {
1608: $hc="BAD CONNECTION ";
1609: }
1610: else {
1611: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1612: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1613: }
1614: $grid.=" hitcount=".$hc;
1615: $grid.=" domain=".$Apache::lonnet::hostdom{$sk};
1616: $grid.=" IP=".$Apache::lonnet::hostip{$sk};
1617: # '+"'"+'">'+
1618: $grid.="'+\"'\"+')\">'+";
1619: $grid.="\n";
1620: $grid.="'<img border=\"0\" name=\"img_".$Apache::lonnet::hostdom{$sk}.
1621: '_'.$sk."\" src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk.
1622: "\" /></a>'+\n";
1623: $grid.="'<br />'+\n" unless $sn%10;
1624: $sn++;
1625: }
1626: my $result.=<<ENDPOP;
1627: <script type="text/javascript">
1628: popwin=open('','popwin','scrollbars=1,width=400,height=220');
1629: popwin.focus();
1630: popwin.document.writeln('<'+'html>');
1631: popwin.document.writeln('<'+'head>');
1632: popwin.document.writeln('<'+'script>');
1633: popwin.document.writeln('hc=new Array();$hcinit');
1634: popwin.document.writeln('<'+'/script>');
1635: popwin.document.writeln('<'+'/head>'+
1636: '<'+'body bgcolor="#FFFFFF">'+
1637: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1638: 'lonanim.gif" '+
1639: 'alt="animated logo" />'+
1640: '<'+'h3>Search Results Progress<'+'/h3>'+
1641: '<'+'form name="popremain">'+
1642: '<'+'tt>'+
1643: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1644: '<'+'br />SCANNING $servernum SERVERS'+
1645: '<'+'br clear="all" />Number of record hits found '+
1646: '<'+'input type="text" size="10" name="numhits"'+
1647: ' value="0" />'+
1648: '<'+'br clear="all" />Time elapsed '+
1649: '<'+'input type="text" size="10" name="elapsetime"'+
1650: ' value="0" />'+
1651: '<'+'br />'+
1652: 'SERVER GRID (click on any cell for details)'+
1653: $grid
1654: '<'+'br />'+
1655: 'Server details '+
1656: '<'+'input type="text" size="35" name="sdetails"'+
1657: ' value="" />'+
1658: '<'+'br />'+
1659: ' <'+'input type="button" name="button"'+
1660: ' value="close this window" '+
1661: ' onClick="javascript:opener.abortsearch()" />'+
1662: ' <'+'input type="button" name="button"'+
1663: ' value="help" onClick="javascript:opener.openhelp()" />'+
1664: '<'+'/tt>'+
1665: '<'+'/form>'+
1666: '<'+'/body><'+'/html>');
1667: popwin.document.close();
1668: </script>
1669: ENDPOP
1670: return $result;
1671: }
1672:
1673: ######################################################################
1674: ######################################################################
1675:
1676: =pod
1677:
1678: =item Metadata Viewing Functions
1679:
1680: Output is a HTML-ified string.
1681: Input arguments are title, author, subject, url, keywords, version,
1682: notes, short abstract, mime, language, creation date,
1683: last revision date, owner, copyright, hostname, and
1684: extra custom metadata to show.
1685:
1686: =over 4
1687:
1688: =item &detailed_citation_view()
1689:
1690: =cut
1691:
1692: ######################################################################
1693: ######################################################################
1694: sub detailed_citation_view {
1695: my %values = @_;
1696: my $result=<<END;
1697: <h3><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1698: target='search_preview'>$values{'title'}</a></h3>
1699: <p>
1700: <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
1701:
1702: <b>Subject: </b> $values{'subject'}<br />
1703: <b>Keyword(s): </b> $values{'keywords'}<br />
1704: <b>Notes: </b> $values{'notes'}<br />
1705: <b>MIME Type: </b> $values{'mimetag'}<br />
1706: <b>Language: </b> $values{'language'}<br />
1707: <b>Copyright/Distribution:</b> $values{'cprtag'}<br />
1708: </p>
1709: $values{'extrashow'}
1710: <p>
1711: $values{'shortabstract'}
1712: </p>
1713: END
1714: return $result;
1715: }
1716:
1717: ######################################################################
1718: ######################################################################
1719:
1720: =pod
1721:
1722: =item &summary_view()
1723:
1724: =cut
1725:
1726: ######################################################################
1727: ######################################################################
1728: sub summary_view {
1729: my %values = @_;
1730: my $result=<<END;
1731: <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1732: target='search_preview'>$values{'author'}</a><br />
1733: $values{'title'}<br />
1734: $values{'owner'} -- $values{'lastrevisiondate'}<br />
1735: $values{'copyrighttag'}<br />
1736: $values{'extrashow'}
1737: </p>
1738: END
1739: return $result;
1740: }
1741:
1742: ######################################################################
1743: ######################################################################
1744:
1745: =pod
1746:
1747: =item &fielded_format_view()
1748:
1749: =cut
1750:
1751: ######################################################################
1752: ######################################################################
1753: sub fielded_format_view {
1754: my %values = @_;
1755: my $result=<<END;
1756: <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
1757: target='search_preview'>$values{'url'}</a>
1758: <br />
1759: <b>Title:</b> $values{'title'}<br />
1760: <b>Author(s):</b> $values{'author'}<br />
1761: <b>Subject:</b> $values{'subject'}<br />
1762: <b>Keyword(s):</b> $values{'keywords'}<br />
1763: <b>Notes:</b> $values{'notes'}<br />
1764: <b>MIME Type:</b> $values{'mimetag'}<br />
1765: <b>Language:</b> $values{'language'}<br />
1766: <b>Creation Date:</b> $values{'creationdate'}<br />
1767: <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
1768: <b>Publisher/Owner:</b> $values{'owner'}<br />
1769: <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
1770: <b>Repository Location:</b> $values{'hostname'}<br />
1771: <b>Abstract:</b> $values{'shortabstract'}<br />
1772: $values{'extrashow'}
1773: </p>
1774: END
1775: return $result;
1776: }
1777:
1778: ######################################################################
1779: ######################################################################
1780:
1781: =pod
1782:
1783: =item &xml_sgml_view()
1784:
1785: =back
1786:
1787: =cut
1788:
1789: ######################################################################
1790: ######################################################################
1791: sub xml_sgml_view {
1792: my %values = @_;
1793: my $result=<<END;
1794: <pre>
1795: <LonCapaResource>
1796: <url>$values{'url'}</url>
1797: <title>$values{'title'}</title>
1798: <author>$values{'author'}</author>
1799: <subject>$values{'subject'}</subject>
1800: <keywords>$values{'keywords'}</keywords>
1801: <notes>$values{'notes'}</notes>
1802: <mimeInfo>
1803: <mime>$values{'mime'}</mime>
1804: <mimetag>$values{'mimetag'}</mimetag>
1805: </mimeInfo>
1806: <languageInfo>
1807: <language>$values{'lang'}</language>
1808: <languagetag>$values{'language'}</languagetag>
1809: </languageInfo>
1810: <creationdate>$values{'creationdate'}</creationdate>
1811: <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate>
1812: <owner>$values{'owner'}</owner>
1813: <copyrightInfo>
1814: <copyright>$values{'copyright'}</copyright>
1815: <copyrighttag>$values{'copyrighttag'}</copyrighttag>
1816: </copyrightInfo>
1817: <repositoryLocation>$values{'hostname'}</repositoryLocation>
1818: <shortabstract>$values{'shortabstract'}</shortabstract>
1819: </LonCapaResource>
1820: </pre>
1821: $values{'extrashow'}
1822: END
1823: return $result;
1824: }
1825:
1826: ######################################################################
1827: ######################################################################
1828:
1829: =pod
1830:
1831: =item &filled() see if field is filled.
1832:
1833: =cut
1834:
1835: ######################################################################
1836: ######################################################################
1837: sub filled {
1838: my ($field)=@_;
1839: if ($field=~/\S/ && $field ne 'any') {
1840: return 1;
1841: }
1842: else {
1843: return 0;
1844: }
1845: }
1846:
1847: ######################################################################
1848: ######################################################################
1849:
1850: =pod
1851:
1852: =item &output_blank_field_error()
1853:
1854: =cut
1855:
1856: ######################################################################
1857: ######################################################################
1858: sub output_blank_field_error {
1859: my ($r)=@_;
1860: # make query information persistent to allow for subsequent revision
1861: my $persistent=&make_persistent(\%ENV);
1862:
1863: $r->print(<<BEGINNING);
1864: <html>
1865: <head>
1866: <title>The LearningOnline Network with CAPA</title>
1867: BEGINNING
1868: $r->print(<<RESULTS);
1869: </head>
1870: <body bgcolor="#ffffff">
1871: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1872: <h1>Search Catalog</h1>
1873: <form method="post" action="/adm/searchcat">
1874: $persistent
1875: <input type='button' value='Revise search request'
1876: onClick='this.form.submit();' />
1877: $closebutton
1878: <hr />
1879: <h3>Helpful Message</h3>
1880: <p>
1881: Incorrect search query due to blank entry fields.
1882: You need to fill in the relevant
1883: fields on the search page in order for a query to be
1884: processed.
1885: </p>
1886: </body>
1887: </html>
1888: RESULTS
1889: }
1890:
1891: ######################################################################
1892: ######################################################################
1893:
1894: =pod
1895:
1896: =item &output_date_error()
1897:
1898: Output a full html page with an error message.
1899:
1900: =cut
1901:
1902: ######################################################################
1903: ######################################################################
1904: sub output_date_error {
1905: my ($r,$message)=@_;
1906: # make query information persistent to allow for subsequent revision
1907: my $persistent=&make_persistent(\%ENV);
1908:
1909: $r->print(<<RESULTS);
1910: <html>
1911: <head>
1912: <title>The LearningOnline Network with CAPA</title>
1913: </head>
1914: <body bgcolor="#ffffff">
1915: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1916: <h1>Search Catalog</h1>
1917: <form method="post" action="/adm/searchcat">
1918: $persistent
1919: <input type='button' value='Revise search request'
1920: onClick='this.form.submit();' />
1921: $closebutton
1922: <hr />
1923: <h3>Helpful Message</h3>
1924: <p>
1925: $message
1926: </p>
1927: </body>
1928: </html>
1929: RESULTS
1930: }
1931:
1932: ######################################################################
1933: ######################################################################
1934:
1935: =pod
1936:
1937: =item &start_fresh_session()
1938:
1939: Cleans the global %hash by removing all fields which begin with
1940: 'pre_' or 'store'.
1941:
1942: =cut
1943:
1944: ######################################################################
1945: ######################################################################
1946: sub start_fresh_session {
1947: delete $hash{'mode_catalog'};
1948: foreach (keys %hash) {
1949: if ($_ =~ /^pre_/) {
1950: delete $hash{$_};
1951: }
1952: if ($_ =~ /^store/) {
1953: delete $hash{$_};
1954: }
1955: }
1956: }
1957:
1958: ######################################################################
1959: ######################################################################
1960:
1961: =pod
1962:
1963: =item &popwin_js() send javascript to popwin
1964:
1965: =cut
1966:
1967: ######################################################################
1968: ######################################################################
1969: sub popwin_js {
1970: # Print javascript out to popwin, but make sure we dont generate
1971: # any javascript errors in doing so.
1972: my ($r,$text) = @_;
1973: $r->print(<<"END");
1974: <script type="text/javascript">
1975: if (! popwin.closed) {
1976: $text
1977: }
1978: </script>
1979: END
1980: $r->rflush();
1981: }
1982:
1983: ######################################################################
1984: ######################################################################
1985:
1986: =pod
1987:
1988: =item &popwin_imgupdate()
1989:
1990: Send a given image (and its location) out to the browser. Takes as
1991: input $r, loncapa server id, and an icon URL.
1992:
1993: =cut
1994:
1995: ######################################################################
1996: ######################################################################
1997: sub popwin_imgupdate {
1998: my ($r,$server,$icon) = @_;
1999: &popwin_js($r,'popwin.document.img_'.$Apache::lonnet::hostdom{$server}.
2000: '_'.$server.'.'.'src="/adm/lonIcons/'.$icon.'";');
2001: }
2002:
2003: 1;
2004:
2005: __END__
2006:
2007: =pod
2008:
2009: =back
2010:
2011: =cut
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