1: # The LearningOnline Network with CAPA
2: #
3: # Search Catalog
4: #
5: # YEAR=2001
6: # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
7: # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
8: # 10/12,10/14,10/15,10/16,11/28 Scott Harrison
9: #
10: # $Id: lonsearchcat.pm,v 1.104 2001/11/28 14:02:31 harris41 Exp $
11: #
12: ###
13:
14: ###############################################################################
15: ## ##
16: ## ORGANIZATION OF THIS PERL MODULE ##
17: ## ##
18: ## 1. Description of functions ##
19: ## 2. Modules used by this module ##
20: ## 3. Choices for different output views (detailed, summary, xml, etc) ##
21: ## 4. BEGIN block (to be run once after compilation) ##
22: ## 5. Handling routine called via Apache and mod_perl ##
23: ## 6. Other subroutines ##
24: ## ##
25: ###############################################################################
26:
27: # ---------------------------------------------------- Description of functions
28: #
29: #
30: # === WEB HANDLER FUNCTIONS
31: # BEGIN() : run once after compilation to initialize values
32: # handler(server reference) : interacts with the Apache server layer
33: # (for /adm/searchcat URLs)
34: # get_unprocessed_cgi() : reads in critical name/value pairs that may have not
35: # been processed and passed into %ENV by the web server
36: # make_persistent() : makes a set of hidden HTML fields to make
37: # SQL search interface information to be persistent
38: #
39: #
40: # === WEB INTERFACE COMPONENT FUNCTIONS
41: # simpletextfield(name,value) : returns HTML formatted string for simple text
42: # field
43: # simplecheckbox(name,value) : returns HTML formatted string for simple
44: # checkbox
45: # searchphrasefield(title,name,value) : returns HTML formatted string for
46: # a search expression phrase field
47: # dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
48: # formatted string
49: # for a calendar date
50: # selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
51: # a selection box field
52: #
53: #
54: # === SEARCH FUNCTIONS
55: # advancedsearch(server reference, environment reference) : perform a complex
56: # multi-field logical query
57: # basicsearch(server reference, environment reference) : perform a simple
58: # single-field logical query
59: # build_SQL_query(field name, logic) : builds a SQL query string from a
60: # logical expression with AND/OR keywords
61: # build_custommetadata_query(field_name, logic_statement) : builds a perl
62: # regular expression from a logical expression with AND/OR
63: # keywords
64: # recursive_SQL_query_build(field name, reverse notation expression) :
65: # builds a SQL query string from a reverse notation expression
66: # logical expression with AND/OR keywords
67: # build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2,
68: # lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) :
69: # Builds a SQL logic query to check time/date entries.
70: #
71: #
72: # === OUTPUTTING RESULTS FUNCTION
73: # output_results(output mode,
74: # server reference,
75: # environment reference,
76: # reply list reference) : outputs results from search
77: #
78: #
79: # === DIFFERENT WAYS TO VIEW METADATA RECORDS
80: # detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
81: # see metadata viewing notes below
82: # summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
83: # see metadata viewing notes below
84: # fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
85: # see metadata viewing notes below
86: # xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
87: # see metadata viewing notes below
88: # ___________________________________________________________________________
89: # | * Metadata viewing notes |
90: # | Output is a HTML-ified string. |
91: # | Input arguments are title, author, subject, url, keywords, version, notes,|
92: # | short abstract, mime, language, creation date, last revision date, owner, |
93: # | copyright, hostname, httphost, and extra custom metadata to show. |
94: # ---------------------------------------------------------------------------
95: #
96: #
97: # === TEST CONDITIONAL FUNCTIONS
98: # filled(field) : determines whether a given field has been filled
99: #
100: #
101: # === ERROR FUNCTIONS
102: # output_blank_field_error(server reference) : outputs a message saying that
103: # more fields need to be filled in
104: # output_date_error(server reference, error message) : outputs
105: # an error message specific to bad date format.
106:
107: package Apache::lonsearchcat;
108:
109: # ------------------------------------------------- modules used by this module
110: use strict;
111: use Apache::Constants qw(:common);
112: use Apache::lonnet();
113: use Apache::File();
114: use CGI qw(:standard);
115: use Text::Query;
116: use GDBM_File;
117:
118: # ---------------------------------------- variables used throughout the module
119:
120: # -- information holders
121: my %language; # holds contents of language.tab
122: my %cprtag; # holds contents of copyright.tab
123: my %mimetag; # holds contents of filetypes.tab
124: my %hostdomains; # matches host name to host domain
125: my %hostips; # matches host name to host ip
126: my %hitcount; # stores number of hits per host
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 $scrout; # string that holds portions of the screen output
134: my $yourself; # allows for quickly limiting to oneself
135: my %hash;
136:
137: # ------------------------------------------ choices for different output views
138: # Detailed Citation View ---> sub detailed_citation_view
139: # Summary View ---> sub summary_view
140: # Fielded Format ---> sub fielded_format_view
141: # XML/SGML ---> sub xml_sgml_view
142: my $basicviewselect=<<END;
143: <select name='basicviewselect'>
144: <option value='Detailed Citation View'>Detailed Citation View</option>
145: <option value='Summary View'>Summary View</option>
146: <option value='Fielded Format'>Fielded Format</option>
147: <option value='XML/SGML'>XML/SGML</option>
148: </select>
149: END
150: my $advancedviewselect=<<END;
151: <select name='advancedviewselect'>
152: <option value='Detailed Citation View'>Detailed Citation View</option>
153: <option value='Summary View'>Summary View</option>
154: <option value='Fielded Format'>Fielded Format</option>
155: <option value='XML/SGML'>XML/SGML</option>
156: </select>
157: END
158:
159: # ----------------------------------------------------------------------- BEGIN
160: sub BEGIN {
161: # --------------------------------- Compute various listings of metadata values
162: $language{'any'}='Any language';
163: {
164: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
165: '/language.tab');
166: map {
167: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
168: $language{$1}=$2;
169: } <$fh>;
170: }
171: $cprtag{'any'}='Any copyright/distribution';
172: {
173: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
174: '/copyright.tab');
175: map {
176: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
177: $cprtag{$1}=$2;
178: } <$fh>;
179: }
180: $mimetag{'any'}='Any type';
181: {
182: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
183: '/filetypes.tab');
184: map {
185: $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp;
186: $mimetag{$1}=".$1 $3";
187: } <$fh>;
188: }
189: {
190: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
191: '/hosts.tab');
192: map {
193: $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp;
194: if ($3 eq 'library') {
195: $hostdomains{$1}=$2;
196: $hostips{$1}=$4;
197: }
198: } <$fh>;
199: }
200: }
201:
202: my $diropendb = "";
203: my $domain = "";
204:
205: # ----------------------------- Handling routine called via Apache and mod_perl
206: sub handler {
207: my $r = shift;
208: untie %hash;
209: &get_unprocessed_cgi();
210:
211: $r->content_type('text/html');
212: $r->send_http_header;
213: return OK if $r->header_only;
214:
215: $domain = $r->dir_config('lonDefDomain');
216:
217: $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
218:
219: if ($ENV{'form.launch'} eq '1') {
220: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
221: &start_fresh_session();
222: untie %hash;
223: }
224: else {
225: $r->print('<html><head></head><body>Unable to tie hash to db '.
226: 'file</body></html>');
227: return OK;
228: }
229: }
230:
231: # ----------------------------------- configure dynamic components of interface
232: my $hidden='';
233: if ($ENV{'form.catalogmode'} eq 'interactive') {
234: $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
235: "\n";
236: $closebutton="<input type='button' name='close' value='CLOSE' ".
237: "onClick='self.close()'>"."\n";
238: }
239: elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
240: $hidden=<<END;
241: <input type='hidden' name='catalogmode' value='groupsearch'>
242: END
243: $closebutton=<<END;
244: <input type='button' name='close' value='CLOSE' onClick='self.close()'>
245: END
246: $importbutton=<<END;
247: <input type='button' name='import' value='IMPORT'
248: onClick='javascript:select_group()'>
249: END
250: }
251:
252: # ------------------------------------------------------ Determine current user
253: $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
254:
255: # --- Now, depending on the interface actions, do one of three things here:
256: # --- 1. a basic search
257: # --- 2. an advanced search
258: # --- 3. output a search interface
259:
260: # ----------------------------------- See if a search invocation should be done
261: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
262: untie %hash; return &basicsearch($r,\%ENV);
263: }
264: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
265: untie %hash; return &advancedsearch($r,\%ENV);
266: }
267:
268: # ----------------------------- Else, begin building search interface to output
269: $scrout=''; # building a part of screen output
270: $scrout.=&searchphrasefield('Limit by title','title',
271: $ENV{'form.title'});
272:
273: $scrout.=&searchphrasefield('Limit by author','author',
274: $ENV{'form.author'});
275:
276: $scrout.=&searchphrasefield('Limit by subject','subject',
277: $ENV{'form.subject'});
278:
279: $scrout.=&searchphrasefield('Limit by keywords','keywords',
280: $ENV{'form.keywords'});
281:
282: $scrout.=&searchphrasefield('Limit by URL','url',
283: $ENV{'form.url'});
284:
285: # $scrout.=&searchphrasefield('Limit by version','version',
286: # $ENV{'form.version'});
287:
288: $scrout.=&searchphrasefield('Limit by notes','notes',
289: $ENV{'form.notes'});
290:
291: $scrout.=&searchphrasefield('Limit by abstract','abstract',
292: $ENV{'form.abstract'});
293:
294: $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
295: $scrout.=&selectbox('Limit by MIME type','mime',
296: $ENV{'form.mime'},%mimetag);
297:
298: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
299:
300: $scrout.=&selectbox('Limit by language','language',
301: $ENV{'form.language'},%language);
302:
303:
304: # ------------------------------------------------ Compute date selection boxes
305: $scrout.=<<CREATIONDATESTART;
306: <p>
307: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
308: </font>
309: <br />
310: between:
311: CREATIONDATESTART
312: $scrout.=&dateboxes('creationdatestart',1,1,1976,
313: $ENV{'form.creationdatestart_month'},
314: $ENV{'form.creationdatestart_day'},
315: $ENV{'form.creationdatestart_year'},
316: );
317: $scrout.=<<CREATIONDATEEND;
318: and:
319: CREATIONDATEEND
320: $scrout.=&dateboxes('creationdateend',12,31,2051,
321: $ENV{'form.creationdateend_month'},
322: $ENV{'form.creationdateend_day'},
323: $ENV{'form.creationdateend_year'},
324: );
325: $scrout.="</p>";
326:
327: $scrout.=<<LASTREVISIONDATESTART;
328: <p>
329: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
330: </b></font>
331: <br />between:
332: LASTREVISIONDATESTART
333: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
334: $ENV{'form.lastrevisiondatestart_month'},
335: $ENV{'form.lastrevisiondatestart_day'},
336: $ENV{'form.lastrevisiondatestart_year'},
337: );
338: $scrout.=<<LASTREVISIONDATEEND;
339: and:
340: LASTREVISIONDATEEND
341: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
342: $ENV{'form.lastrevisiondateend_month'},
343: $ENV{'form.lastrevisiondateend_day'},
344: $ENV{'form.lastrevisiondateend_year'},
345: );
346: $scrout.='</p>';
347:
348: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
349: $ENV{'form.owner'});
350:
351: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
352: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
353: $ENV{'form.copyright'},%cprtag);
354:
355: # ------------------------------------------- Compute customized metadata field
356: $scrout.=<<CUSTOMMETADATA;
357: <p>
358: <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
359: </font>
360: For resource-specific metadata, enter in an expression in the form of
361: <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
362: <b>Example:</b> grandmother=75 OR grandfather=85
363: <br />
364: CUSTOMMETADATA
365: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
366: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
367:
368: $scrout.=<<CUSTOMSHOW;
369: <p>
370: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
371: </font>
372: Enter in a space-separated list of special metadata fields to show
373: in a fielded listing for each record result.
374: <br />
375: CUSTOMSHOW
376: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
377: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
378:
379: # ---------------------------------------------------------------- Print screen
380: $r->print(<<ENDDOCUMENT);
381: <html>
382: <head>
383: <title>The LearningOnline Network with CAPA</title>
384: <script type="text/javascript">
385: function openhelp(val) {
386: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
387: 'scrollbars=1,width=400,height=300');
388: openhelpwin.focus();
389: }
390: </script>
391: </head>
392: <body bgcolor="#FFFFFF">
393: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
394: <h1>Search Catalog</h1>
395: <form method="post" action="/adm/searchcat">
396: $hidden
397: <hr />
398: <h3>Basic Search</h3>
399: <p>
400: Enter terms or phrases separated by search operators
401: such as AND, OR, or NOT then press SEARCH below. Terms should be specific
402: to the title, author, subject, notes, or abstract information associated
403: with a resource.
404: <br />
405: ENDDOCUMENT
406: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
407: $r->print(' ');
408: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
409: $r->print('<font color="#800000">Title only</font> ');
410: # $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
411: # <font color="#800000">Search historic archives</font>
412: $r->print(<<ENDDOCUMENT);
413: <br />
414: <input type="submit" name="basicsubmit" value='SEARCH' />
415: <input type="reset" name="reset" value='RESET' />
416: $closebutton
417: $basicviewselect
418: <input type="button" value="HELP" onClick="openhelp()" />
419: </p>
420: <hr />
421: <h3>Advanced Search</h3>
422: $scrout
423: <p>
424: <input type="submit" name="advancedsubmit" value='SEARCH' />
425: <input type="reset" name="reset" value='RESET' />
426: $closebutton
427: $advancedviewselect
428: <input type="button" value="HELP" onClick="openhelp()" />
429: </p>
430: </form>
431: </body>
432: </html>
433: ENDDOCUMENT
434: return OK;
435: }
436:
437: # ----------- grab unprocessed CGI variables that may have been appended to URL
438: sub get_unprocessed_cgi {
439: map {
440: my ($name, $value) = split(/=/,$_);
441: $value =~ tr/+/ /;
442: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
443: if ($name eq 'catalogmode' or $name eq 'launch' or $name eq 'acts') {
444: $ENV{'form.'.$name}=$value;
445: }
446: } (split(/&/,$ENV{'QUERY_STRING'}));
447: }
448:
449: # ------------------------------------------------------------- make persistent
450: sub make_persistent {
451: my $persistent='';
452:
453: map {
454: if (/^form\./ && !/submit/) {
455: my $name=$_;
456: my $key=$name;
457: $ENV{$key}=~s/\'//g; # do not mess with html field syntax
458: $name=~s/^form\.//;
459: $persistent.=<<END;
460: <input type='hidden' name='$name' value='$ENV{$key}' />
461: END
462: }
463: } (keys %ENV);
464: return $persistent;
465: }
466:
467: # --------------------------------------------------------- Various form fields
468:
469: sub simpletextfield {
470: my ($name,$value)=@_;
471: return '<input type=text name=\''.$name.
472: '\' size=20 value=\''.$value.'\' />';
473: }
474:
475: sub simplecheckbox {
476: my ($name,$value)=@_;
477: my $checked='';
478: $checked="CHECKED" if $value eq 'on';
479: return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
480: }
481:
482: sub searchphrasefield {
483: my ($title,$name,$value)=@_;
484: my $instruction=<<END;
485: Enter terms or phrases separated by search operators such
486: as AND, OR, or NOT.
487: END
488: my $uctitle=uc($title);
489: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
490: "</FONT> $instruction<br />".
491: '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
492: }
493:
494: sub dateboxes {
495: my ($name,$defaultmonth,$defaultday,$defaultyear,
496: $currentmonth,$currentday,$currentyear)=@_;
497: ($defaultmonth,$defaultday,$defaultyear)=('','','');
498: my $month=<<END;
499: <select name="${name}_month">
500: <option value='$defaultmonth'> </option>
501: <option value="1">January</option>
502: <option value="2">February</option>
503: <option value="3">March</option>
504: <option value="4">April</option>
505: <option value="5">May</option>
506: <option value="6">June</option>
507: <option value="7">July</option>
508: <option value="8">August</option>
509: <option value="9">September</option>
510: <option value="10">October</option>
511: <option value="11">November</option>
512: <option value="12">December</option>
513: </select>
514: END
515: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
516: my $day=<<END;
517: <select name="${name}_day">
518: <option value='$defaultday'> </option>
519: <option value="1">1</option>
520: <option value="2">2</option>
521: <option value="3">3</option>
522: <option value="4">4</option>
523: <option value="5">5</option>
524: <option value="6">6</option>
525: <option value="7">7</option>
526: <option value="8">8</option>
527: <option value="9">9</option>
528: <option value="10">10</option>
529: <option value="11">11</option>
530: <option value="12">12</option>
531: <option value="13">13</option>
532: <option value="14">14</option>
533: <option value="15">15</option>
534: <option value="16">16</option>
535: <option value="17">17</option>
536: <option value="18">18</option>
537: <option value="19">19</option>
538: <option value="20">20</option>
539: <option value="21">21</option>
540: <option value="22">22</option>
541: <option value="23">23</option>
542: <option value="24">24</option>
543: <option value="25">25</option>
544: <option value="26">26</option>
545: <option value="27">27</option>
546: <option value="28">28</option>
547: <option value="29">29</option>
548: <option value="30">30</option>
549: <option value="31">31</option>
550: </select>
551: END
552: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
553: my $year=<<END;
554: <select name="${name}_year">
555: <option value='$defaultyear'> </option>
556: <option value="1976">1976</option>
557: <option value="1977">1977</option>
558: <option value="1978">1978</option>
559: <option value="1979">1979</option>
560: <option value="1980">1980</option>
561: <option value="1981">1981</option>
562: <option value="1982">1982</option>
563: <option value="1983">1983</option>
564: <option value="1984">1984</option>
565: <option value="1985">1985</option>
566: <option value="1986">1986</option>
567: <option value="1987">1987</option>
568: <option value="1988">1988</option>
569: <option value="1989">1989</option>
570: <option value="1990">1990</option>
571: <option value="1991">1991</option>
572: <option value="1992">1992</option>
573: <option value="1993">1993</option>
574: <option value="1994">1994</option>
575: <option value="1995">1995</option>
576: <option value="1996">1996</option>
577: <option value="1997">1997</option>
578: <option value="1998">1998</option>
579: <option value="1999">1999</option>
580: <option value="2000">2000</option>
581: <option value="2001">2001</option>
582: <option value="2002">2002</option>
583: <option value="2003">2003</option>
584: <option value="2004">2004</option>
585: <option value="2005">2005</option>
586: <option value="2006">2006</option>
587: <option value="2007">2007</option>
588: <option value="2008">2008</option>
589: <option value="2009">2009</option>
590: <option value="2010">2010</option>
591: <option value="2011">2011</option>
592: <option value="2012">2012</option>
593: <option value="2013">2013</option>
594: <option value="2014">2014</option>
595: <option value="2015">2015</option>
596: <option value="2016">2016</option>
597: <option value="2017">2017</option>
598: <option value="2018">2018</option>
599: <option value="2019">2019</option>
600: <option value="2020">2020</option>
601: <option value="2021">2021</option>
602: <option value="2022">2022</option>
603: <option value="2023">2023</option>
604: <option value="2024">2024</option>
605: <option value="2025">2025</option>
606: <option value="2026">2026</option>
607: <option value="2027">2027</option>
608: <option value="2028">2028</option>
609: <option value="2029">2029</option>
610: <option value="2030">2030</option>
611: <option value="2031">2031</option>
612: <option value="2032">2032</option>
613: <option value="2033">2033</option>
614: <option value="2034">2034</option>
615: <option value="2035">2035</option>
616: <option value="2036">2036</option>
617: <option value="2037">2037</option>
618: <option value="2038">2038</option>
619: <option value="2039">2039</option>
620: <option value="2040">2040</option>
621: <option value="2041">2041</option>
622: <option value="2042">2042</option>
623: <option value="2043">2043</option>
624: <option value="2044">2044</option>
625: <option value="2045">2045</option>
626: <option value="2046">2046</option>
627: <option value="2047">2047</option>
628: <option value="2048">2048</option>
629: <option value="2049">2049</option>
630: <option value="2050">2050</option>
631: <option value="2051">2051</option>
632: </select>
633: END
634: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
635: return "$month$day$year";
636: }
637:
638: sub selectbox {
639: my ($title,$name,$value,%options)=@_;
640: my $uctitle=uc($title);
641: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
642: "</b></font><br />".'<select name="'.$name.'">';
643: map {
644: $selout.='<option value=\''.$_.'\'';
645: if ($_ eq $value) { $selout.=' selected'; }
646: $selout.='>'.$options{$_}.'</option>';
647: } sort keys %options;
648: return $selout.'</select>';
649: }
650:
651: # ----------------------------------------------- Performing an advanced search
652: sub advancedsearch {
653: my ($r,$envhash)=@_;
654: my %ENV=%{$envhash};
655:
656: my $fillflag=0;
657: # Clean up fields for safety
658: for my $field ('title','author','subject','keywords','url','version',
659: 'creationdatestart_month','creationdatestart_day',
660: 'creationdatestart_year','creationdateend_month',
661: 'creationdateend_day','creationdateend_year',
662: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
663: 'lastrevisiondatestart_year','lastrevisiondateend_month',
664: 'lastrevisiondateend_day','lastrevisiondateend_year',
665: 'notes','abstract','mime','language','owner',
666: 'custommetadata','customshow') {
667: $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
668: }
669:
670: # Check to see if enough information was filled in
671: for my $field ('title','author','subject','keywords','url','version',
672: 'notes','abstract','mime','language','owner',
673: 'custommetadata') {
674: if (&filled($ENV{"form.$field"})) {
675: $fillflag++;
676: }
677: }
678: unless ($fillflag) {
679: &output_blank_field_error($r);
680: return OK;
681: }
682:
683:
684: # Turn the form input into a SQL-based query
685: my $query='';
686:
687: my @queries;
688: # Evaluate logical expression AND/OR/NOT phrase fields.
689: foreach my $field ('title','author','subject','notes','abstract','url',
690: 'keywords','version','owner') {
691: if ($ENV{'form.'.$field}) {
692: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
693: }
694: }
695: # Evaluate option lists
696: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
697: push @queries,"(language like \"$ENV{'form.language'}\")";
698: }
699: if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
700: push @queries,"(mime like \"$ENV{'form.mime'}\")";
701: }
702: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
703: push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
704: }
705: # Evaluate date windows
706: my $datequery=&build_date_queries(
707: $ENV{'form.creationdatestart_month'},
708: $ENV{'form.creationdatestart_day'},
709: $ENV{'form.creationdatestart_year'},
710: $ENV{'form.creationdateend_month'},
711: $ENV{'form.creationdateend_day'},
712: $ENV{'form.creationdateend_year'},
713: $ENV{'form.lastrevisiondatestart_month'},
714: $ENV{'form.lastrevisiondatestart_day'},
715: $ENV{'form.lastrevisiondatestart_year'},
716: $ENV{'form.lastrevisiondateend_month'},
717: $ENV{'form.lastrevisiondateend_day'},
718: $ENV{'form.lastrevisiondateend_year'},
719: );
720: # Test to see if date windows are legitimate
721: if ($datequery=~/^Incorrect/) {
722: &output_date_error($r,$datequery);
723: return OK;
724: }
725: elsif ($datequery) {
726: push @queries,$datequery;
727: }
728:
729: # Process form information for custom metadata querying
730: my $customquery='';
731: if ($ENV{'form.custommetadata'}) {
732: $customquery=&build_custommetadata_query('custommetadata',
733: $ENV{'form.custommetadata'});
734: }
735: my $customshow='';
736: if ($ENV{'form.customshow'}) {
737: $customshow=$ENV{'form.customshow'};
738: $customshow=~s/[^\w\s]//g;
739: my @fields=split(/\s+/,$customshow);
740: $customshow=join(" ",@fields);
741: }
742: # Send query statements over the network to be processed by either the SQL
743: # database or a recursive scheme of 'grep'-like actions (for custom
744: # metadata).
745: if (@queries) {
746: $query=join(" AND ",@queries);
747: $query="select * from metadata where $query";
748: my $reply; # reply hash reference
749: unless ($customquery or $customshow) {
750: $reply=&Apache::lonnet::metadata_query($query);
751: }
752: else {
753: $reply=&Apache::lonnet::metadata_query($query,
754: $customquery,$customshow);
755: }
756: &output_results('Advanced',$r,$envhash,$customquery,$reply);
757: }
758: elsif ($customquery) {
759: my $reply; # reply hash reference
760: $reply=&Apache::lonnet::metadata_query('',
761: $customquery,$customshow);
762: &output_results('Advanced',$r,$envhash,$customquery,$reply);
763: }
764: # should not get to this point
765: return 'Error. Should not have gone to this point.';
766: }
767:
768: # --------------------------------------------------- Performing a basic search
769: sub basicsearch {
770: my ($r,$envhash)=@_;
771: my %ENV=%{$envhash};
772: # Clean up fields for safety
773: for my $field ('basicexp') {
774: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
775: }
776:
777: # Check to see if enough is filled in
778: unless (&filled($ENV{'form.basicexp'})) {
779: &output_blank_field_error($r);
780: return OK;
781: }
782:
783: # Build SQL query string based on form page
784: my $query='';
785: my $concatarg=join('," ",',
786: ('title', 'author', 'subject', 'notes', 'abstract'));
787: $concatarg='title' if $ENV{'form.titleonly'};
788:
789: $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
790:
791: # Get reply (either a hash reference to filehandles or bad connection)
792: my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
793:
794: # Output search results
795:
796: &output_results('Basic',$r,$envhash,$query,$reply);
797:
798: return OK;
799: }
800:
801: # ------------------------------------------------------------- build_SQL_query
802: sub build_SQL_query {
803: my ($field_name,$logic_statement)=@_;
804: my $q=new Text::Query('abc',
805: -parse => 'Text::Query::ParseAdvanced',
806: -build => 'Text::Query::Build');
807: $q->prepare($logic_statement);
808: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
809: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
810: return $sql_query;
811: }
812:
813: # ------------------------------------------------- build custom metadata query
814: sub build_custommetadata_query {
815: my ($field_name,$logic_statement)=@_;
816: my $q=new Text::Query('abc',
817: -parse => 'Text::Query::ParseAdvanced',
818: -build => 'Text::Query::BuildAdvancedString');
819: $q->prepare($logic_statement);
820: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
821: # quick fix to change literal into xml tag-matching
822: # will eventually have to write a separate builder module
823: my $oldmatchexp=$matchexp;
824: $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
825: return $matchexp;
826: }
827:
828: # - Recursively parse a reverse notation expression into a SQL query expression
829: sub recursive_SQL_query_build {
830: my ($dkey,$pattern)=@_;
831: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
832: return $pattern unless @matches;
833: foreach my $match (@matches) {
834: $match=~/\[ (\w+)\s(.*) \]/;
835: my ($key,$value)=($1,$2);
836: my $replacement='';
837: if ($key eq 'literal') {
838: $replacement="($dkey like \"\%$value\%\")";
839: }
840: elsif ($key eq 'not') {
841: $value=~s/like/not like/;
842: # $replacement="($dkey not like $value)";
843: $replacement="$value";
844: }
845: elsif ($key eq 'and') {
846: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
847: $replacement="($1 AND $2)";
848: }
849: elsif ($key eq 'or') {
850: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
851: $replacement="($1 OR $2)";
852: }
853: substr($pattern,
854: index($pattern,$match),
855: length($match),
856: $replacement
857: );
858: }
859: &recursive_SQL_query_build($dkey,$pattern);
860: }
861:
862: # ------------------------------------------------------------ Build date query
863: sub build_date_queries {
864: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
865: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
866: my @queries;
867: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
868: unless ($cmonth1 and $cday1 and $cyear1 and
869: $cmonth2 and $cday2 and $cyear2) {
870: return "Incorrect entry for the creation date. You must specify ".
871: "a starting month, day, and year and an ending month, ".
872: "day, and year.";
873: }
874: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
875: $cnumeric1+=0;
876: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
877: $cnumeric2+=0;
878: if ($cnumeric1>$cnumeric2) {
879: return "Incorrect entry for the creation date. The starting ".
880: "date must occur before the ending date.";
881: }
882: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
883: "$cyear2-$cmonth2-$cday2 23:59:59')";
884: push @queries,$cquery;
885: }
886: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
887: unless ($lmonth1 and $lday1 and $lyear1 and
888: $lmonth2 and $lday2 and $lyear2) {
889: return "Incorrect entry for the last revision date. You must ".
890: "specify a starting month, day, and year and an ending ".
891: "month, day, and year.";
892: }
893: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
894: $lnumeric1+=0;
895: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
896: $lnumeric2+=0;
897: if ($lnumeric1>$lnumeric2) {
898: return "Incorrect entry for the last revision date. The ".
899: "starting date must occur before the ending date.";
900: }
901: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
902: "$lyear2-$lmonth2-$lday2 23:59:59')";
903: push @queries,$lquery;
904: }
905: if (@queries) {
906: return join(" AND ",@queries);
907: }
908: return '';
909: }
910:
911: # ----------------------------- format and output results based on a reply list
912: # There are two windows that this function writes to. The main search
913: # window ("srch") has a listing of the results. A secondary window ("popwin")
914: # gives the status of the network search (time elapsed, number of machines
915: # contacted, etc.)
916: sub output_results {
917: my $fnum; # search result counter
918: my ($mode,$r,$envhash,$query,$replyref)=@_;
919: my %ENV=%{$envhash};
920: my %rhash=%{$replyref};
921: my $compiledresult='';
922: my $timeremain=300;
923: my $elapsetime=0;
924: my $resultflag=0;
925: my $tflag=1;
926:
927: # make query information persistent to allow for subsequent revision
928: my $persistent=&make_persistent();
929:
930: # output beginning of search page
931: $r->print(<<BEGINNING);
932: <html>
933: <head>
934: <title>The LearningOnline Network with CAPA</title>
935: BEGINNING
936:
937: # conditional output of script functions dependent on the mode in
938: # which the search was invoked
939: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
940: <script type="text/javascript">
941: function select_data(title,url) {
942: changeTitle(title);
943: changeURL(url);
944: self.close();
945: }
946: function changeTitle(val) {
947: if (opener.inf.document.forms.resinfo.elements.t) {
948: opener.inf.document.forms.resinfo.elements.t.value=val;
949: }
950: }
951: function changeURL(val) {
952: if (opener.inf.document.forms.resinfo.elements.u) {
953: opener.inf.document.forms.resinfo.elements.u.value=val;
954: }
955: }
956: </script>
957: SCRIPT
958: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
959: <script type="text/javascript">
960: function select_data(title,url) {
961: // alert('DEBUG: Should be storing '+title+' and '+url);
962: }
963: function queue(val) {
964: if (eval("document.forms.results.returnvalues["+val+"].checked")) {
965: document.forms.results.acts.value+='1a'+val+'b';
966: }
967: else {
968: document.forms.results.acts.value+='0a'+val+'b';
969: }
970: }
971: function select_group() {
972: window.location="/adm/groupsort?catalogmode=groupsearch&acts="+
973: document.forms.results.acts.value;
974: }
975: </script>
976: SCRIPT
977: $r->print(<<SCRIPT);
978: <script type="text/javascript">
979: function displayinfo(val) {
980: popwin.document.forms.popremain.sdetails.value=val;
981: }
982: function openhelp(val) {
983: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
984: 'scrollbars=1,width=400,height=300');
985: openhelpwin.focus();
986: }
987: function abortsearch(val) {
988: openhelpwin=open('/adm/help/searchcat.html','helpscreen',
989: 'scrollbars=1,width=400,height=300');
990: openhelpwin.focus();
991: }
992: </script>
993: SCRIPT
994: $r->rflush();
995:
996: # begin showing the cataloged results
997: $r->print(<<CATALOGBEGIN);
998: </head>
999: <body bgcolor="#ffffff">
1000: <img align=right src=/adm/lonIcons/lonlogos.gif>
1001: <h1>Search Catalog</h1>
1002: CATALOGBEGIN
1003: $r->print(<<CATALOGCONTROLS);
1004: <form name='results' method="post" action="/adm/searchcat">
1005: <input type='hidden' name='acts' value='' />
1006: <input type='button' value='Revise search request'
1007: onClick='this.form.submit();' />
1008: $importbutton
1009: $closebutton
1010: $persistent
1011: <hr />
1012: <h3>Search Query</h3>
1013: CATALOGCONTROLS
1014: if ($mode eq 'Basic') {
1015: $r->print(<<RESULTS);
1016: <p>
1017: <b>Basic search:</b> $ENV{'form.basicexp'}
1018: </p>
1019: RESULTS
1020: }
1021: elsif ($mode eq 'Advanced') {
1022: $r->print(<<RESULTS);
1023: <p>
1024: <b>Advanced search</b>
1025: $query
1026: </p>
1027: RESULTS
1028: }
1029: $r->print('<h3>Search Results</h3>');
1030: $r->rflush();
1031: my $servernum=(keys %rhash)+0;
1032:
1033: # define server grid (shows status of multiple machines)
1034: my $hcinit;
1035: my $grid="'<br />'+";
1036: $grid.="\n";
1037: my $sn=1;
1038: for my $sk (sort keys %rhash) {
1039: # '<a href="
1040: $grid.="'<a href=\"";
1041: # javascript:displayinfo('+
1042: $grid.="javascript:opener.displayinfo('+";
1043: # "'"+'key
1044: $grid.="\"'\"+'";
1045: $grid.=$sk;
1046: my $hc;
1047: if ($rhash{$sk} eq 'con_lost') {
1048: $hc="!!!BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR!!!";
1049: }
1050: else {
1051: $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
1052: $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
1053: }
1054: $grid.=" hitcount=".$hc;
1055: $grid.=" domain=".$hostdomains{$sk};
1056: $grid.=" IP=".$hostips{$sk};
1057: # '+"'"+'">'+
1058: $grid.="'+\"'\"+')\">'+";
1059: $grid.="\n";
1060: $grid.="'<img border=\"0\" name=\"img".$sn."\"".
1061: " src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk."\" /></a>'+\n";
1062: $grid.="'<br />'+\n" unless $sn%10;
1063: $sn++;
1064: }
1065: $r->print(<<ENDPOP);
1066: <script type="text/javascript">
1067: popwin=open('','popwin','scrollbars=1,width=400,height=200');
1068: popwin.focus();
1069: popwin.document.writeln('<'+'html>');
1070: popwin.document.writeln('<'+'head>');
1071: popwin.document.writeln('<'+'script>');
1072: popwin.document.writeln('hc=new Array();$hcinit');
1073: popwin.document.writeln('<'+'/script>');
1074: popwin.document.writeln('<'+'/head>'+
1075: '<'+'body bgcolor="#FFFFFF">'+
1076: '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
1077: 'lonanim.gif" '+
1078: 'alt="animated logo" />'+
1079: '<'+'h3>Search Results Progress<'+'/h3>'+
1080: '<'+'form name="popremain">'+
1081: '<'+'tt>'+
1082: '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+
1083: '<'+'br />SCANNING $servernum SERVERS'+
1084: '<'+'br clear="all" />Number of record hits found '+
1085: '<'+'input type="text" size="10" name="numhits"'+
1086: ' value="0" />'+
1087: '<'+'br clear="all" />Time elapsed '+
1088: '<'+'input type="text" size="10" name="elapsetime"'+
1089: ' value="0" />'+
1090: '<'+'br />'+
1091: 'SERVER GRID (click on any cell for details)'+
1092: $grid
1093: '<'+'br />'+
1094: 'Server details '+
1095: '<'+'input type="text" size="25" name="sdetails"'+
1096: ' value="" />'+
1097: '<'+'br />'+
1098: ' <'+'input type="button" name="button"'+
1099: ' value="abort search and view current results" '+
1100: ' onClick="javascript:opener.abortsearch()" />'+
1101: ' <'+'input type="button" name="button"'+
1102: ' value="help" onClick="javascript:opener.openhelp()" />'+
1103: '<'+'/tt>'+
1104: '<'+'/form>'+
1105: '<'+'/body><'+'/html>');
1106: popwin.document.close();
1107: </script>
1108: ENDPOP
1109: $r->rflush();
1110:
1111: my $servercount=0;
1112: my $hitcountsum=0;
1113: my $bloop=$servernum;
1114: my %orkey;
1115: BLOOP: while(1) {
1116: my $sn=0;
1117: last BLOOP unless $bloop;
1118: RLOOP: foreach my $rkey (sort keys %rhash) {
1119: $sn++;
1120: next RLOOP if $orkey{$rkey};
1121: $servercount++;
1122: $tflag=1;
1123: $compiledresult='';
1124: my $hostname=$rkey;
1125: my $reply=$rhash{$rkey};
1126: my @results;
1127:
1128: my $replyfile='';
1129:
1130: if ($reply eq 'con_lost') {
1131: $r->print('<script type="text/javascript">popwin.document.img'.
1132: $sn.'.'.
1133: 'src="/adm/lonIcons/srvbad.gif";</script>'.
1134: "\n");
1135: $r->rflush();
1136: $bloop--;
1137: $orkey{$rkey}=1;
1138: }
1139: else {
1140: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
1141: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
1142: $reply=~/(.*?)\_/;
1143: {
1144: my $temp=0;
1145: WLOOP: while (1) {
1146: if (-e $replyfile && $tflag) {
1147: $r->print('<script type="text/javascript">'.
1148: 'popwin.document.img'.$sn.'.'.
1149: 'src="/adm/lonIcons/srvhalf.gif";</script>'.
1150: "\n");
1151: $r->rflush();
1152: $r->print('<script type="text/javascript">'.
1153: 'popwin.hc["'.$rkey.'"]='.
1154: '"still transferring..."'.';</script>'.
1155: "\n");
1156: $r->rflush();
1157: $tflag=0;
1158: }
1159: last WLOOP if $temp>1;
1160: if (-e "$replyfile.end") {
1161: $bloop--;
1162: $orkey{$rkey}=1;
1163: if (-s $replyfile) {
1164: $r->print('<script type="text/javascript">'.
1165: 'popwin.document.img'.$sn.'.'.
1166: 'src="/adm/lonIcons/srvgood.gif";'.
1167: '</script>'."\n");
1168: $r->rflush();
1169: my $fh=Apache::File->new($replyfile) or
1170: ($r->print('ERROR: file '.
1171: $replyfile.' cannot be opened') and
1172: return OK);
1173: @results=<$fh> if $fh;
1174: $hitcount{$rkey}=@results+0;
1175: $r->print('<script type="text/javascript">'.
1176: 'popwin.hc["'.$rkey.'"]='.
1177: $hitcount{$rkey}.';</script>'.
1178: "\n");
1179: $r->rflush();
1180: $hitcountsum+=$hitcount{$rkey};
1181: $r->print('<script type="text/javascript">'.
1182: 'popwin.document.forms.popremain.'.
1183: 'numhits.value='.$hitcountsum.
1184: ';</script>'.
1185: "\n");
1186: $r->rflush();
1187: }
1188: else {
1189: $r->print('<script type="text/javascript">'.
1190: 'popwin.document.img'.$sn.'.'.
1191: 'src="/adm/lonIcons/srvempty.gif";'.
1192: '</script>'.
1193: "\n");
1194: $r->rflush();
1195: $r->print('<script type="text/javascript">'.
1196: 'popwin.hc["'.$rkey.'"]=0'.
1197: ';</script>'.
1198: "\n");
1199: $r->rflush();
1200: }
1201: last WLOOP;
1202: }
1203: last WLOOP unless $timeremain;
1204: sleep 1;
1205: $timeremain--;
1206: $elapsetime++;
1207: $r->print('<script type="text/javascript">'.
1208: 'popwin.document.popremain.elapsetime.'.
1209: 'value="'.$elapsetime.'";</script>'."\n");
1210: $r->rflush();
1211: $temp++;
1212: }
1213: }
1214: $r->print('<script type="text/javascript">'.
1215: 'popwin.document.whirly.'.
1216: 'src="'.'/adm/lonIcons/lonanimend.gif'.
1217: '";</script>'."\n");
1218: $r->rflush();
1219: }
1220: my $customshow='';
1221: my $extrashow='';
1222: my @customfields;
1223: if ($ENV{'form.customshow'}) {
1224: $customshow=$ENV{'form.customshow'};
1225: $customshow=~s/[^\w\s]//g;
1226: my @fields=map {"<font color=\"#008000\">$_:</font><!-- $_ -->"}
1227: split(/\s+/,$customshow);
1228: @customfields=split(/\s+/,$customshow);
1229: if ($customshow) {
1230: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
1231: }
1232: }
1233: my $customdata='';
1234: my %customhash;
1235: foreach my $result (@results) {
1236: if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
1237: my $tmp=$result;
1238: $tmp=~s/^custom\=//;
1239: my ($k,$v)=map {&Apache::lonnet::unescape($_);
1240: } split(/\,/,$tmp);
1241: $customhash{$k}=$v;
1242: }
1243: }
1244: if (keys %hash) {
1245: untie %hash;
1246: }
1247: if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
1248: if ($ENV{'form.launch'} eq '1') {
1249: &start_fresh_session();
1250: }
1251: foreach my $result (@results) {
1252: next if $result=~/^custom\=/;
1253: chomp $result;
1254: next unless $result;
1255: my @fields=map
1256: {&Apache::lonnet::unescape($_)}
1257: (split(/\,/,$result));
1258: my ($title,$author,$subject,$url,$keywords,$version,
1259: $notes,$abstract,$mime,$lang,
1260: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
1261:
1262: unless ($ENV{'user.adv'}) {
1263: $keywords='<i>- not displayed -</i>';
1264: $fields[4]=$keywords;
1265: $notes='<i>- not displayed -</i>';
1266: $fields[6]=$notes;
1267: $abstract='<i>- not displayed -</i>';
1268: $fields[7]=$abstract;
1269: $subject='<i>- not displayed -</i>';
1270: $fields[2]=$subject;
1271: }
1272:
1273: my $shortabstract=$abstract;
1274: $shortabstract=substr($abstract,0,200).'...' if length($abstract)>200;
1275: $fields[7]=$shortabstract;
1276: my $shortkeywords=$keywords;
1277: $shortkeywords=substr($keywords,0,200).'...' if length($keywords)>200;
1278: $fields[4]=$shortkeywords;
1279:
1280: my $extrashow2=$extrashow;
1281: if ($extrashow) {
1282: foreach my $field (@customfields) {
1283: my $value='';
1284: if ($customhash{$url}=~/\<${field}[^\>]*\>(.*?)\<\/${field}[^\>]*\>/s) {
1285: $value=$1;
1286: }
1287: $extrashow2=~s/\<\!\-\- $field \-\-\>/ $value/g;
1288: }
1289: }
1290:
1291: $compiledresult.=<<END if $compiledresult or $servercount!=$servernum;
1292: <hr align='left' width='200' noshade />
1293: END
1294: $compiledresult.=<<END;
1295: <p>
1296: END
1297: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
1298: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
1299: onClick="javascript:select_data('$title','$url')">
1300: </font>
1301: <br />
1302: END
1303: if ($ENV{'form.catalogmode'} eq 'groupsearch') {
1304: $fnum+=0;
1305: $hash{"pre_${fnum}_link"}=$url;
1306: $hash{"pre_${fnum}_title"}=$title;
1307: $compiledresult.=<<END;
1308: <font size='-1'><input type="checkbox" name="returnvalues" value="SELECT"
1309: onClick="javascript:queue($fnum)" />
1310: </font>
1311: <br />
1312: END
1313: # <input type="hidden" name="title$fnum" value="$title" />
1314: # <input type="hidden" name="url$fnum" value="$url" />
1315: $fnum++;
1316: }
1317: my $httphost=$ENV{'HTTP_HOST'};
1318:
1319: my $viewselect;
1320: if ($mode eq 'Basic') {
1321: $viewselect=$ENV{'form.basicviewselect'};
1322: }
1323: elsif ($mode eq 'Advanced') {
1324: $viewselect=$ENV{'form.advancedviewselect'};
1325: }
1326:
1327: if ($viewselect eq 'Detailed Citation View') {
1328: $compiledresult.=&detailed_citation_view(@fields,
1329: $hostname,$httphost,
1330: $extrashow2);
1331: }
1332: elsif ($viewselect eq 'Summary View') {
1333: $compiledresult.=&summary_view(@fields,$hostname,$httphost,
1334: $extrashow2);
1335: }
1336: elsif ($viewselect eq 'Fielded Format') {
1337: $compiledresult.=&fielded_format_view(@fields,$hostname,
1338: $httphost,$extrashow2);
1339: }
1340: elsif ($viewselect eq 'XML/SGML') {
1341: $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,
1342: $extrashow2);
1343: }
1344:
1345: }
1346:
1347: untie %hash;
1348: }
1349: else {
1350: $r->print('<html><head></head><body>Unable to tie hash to db '.
1351: 'file</body></html>');
1352: }
1353: if ($compiledresult) {
1354: $resultflag=1;
1355: }
1356:
1357: $r->print(<<RESULTS);
1358: $compiledresult
1359: RESULTS
1360: my $percent=sprintf('%3.0f',($servercount/$servernum*100));
1361: }
1362: }
1363: unless ($resultflag) {
1364: $r->print("\nThere were no results that matched your query\n");
1365: }
1366: # $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush();
1367: $r->print(<<RESULTS);
1368: </body>
1369: </html>
1370: RESULTS
1371: }
1372:
1373: # ------------------------------------------------------ Detailed Citation View
1374: sub detailed_citation_view {
1375: my ($title,$author,$subject,$url,$keywords,$version,
1376: $notes,$shortabstract,$mime,$lang,
1377: $creationdate,$lastrevisiondate,$owner,$copyright,
1378: $hostname,$httphost,$extrashow)=@_;
1379: my $result=<<END;
1380: <i>$owner</i>, last revised $lastrevisiondate
1381: <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
1382: <h3>$author</h3>
1383: </p>
1384: <p>
1385: <b>Subject:</b> $subject<br />
1386: <b>Keyword(s):</b> $keywords<br />
1387: <b>Notes:</b> $notes<br />
1388: <b>MIME Type:</b> $mimetag{$mime}<br />
1389: <b>Language:</b> $language{$lang}<br />
1390: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
1391: </p>
1392: $extrashow
1393: <p>
1394: $shortabstract
1395: </p>
1396: END
1397: return $result;
1398: }
1399:
1400: # ---------------------------------------------------------------- Summary View
1401: sub summary_view {
1402: my ($title,$author,$subject,$url,$keywords,$version,
1403: $notes,$shortabstract,$mime,$lang,
1404: $creationdate,$lastrevisiondate,$owner,$copyright,
1405: $hostname,$httphost,$extrashow)=@_;
1406: my $result=<<END;
1407: <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
1408: $title<br />
1409: $owner -- $lastrevisiondate<br />
1410: $cprtag{$copyright}<br />
1411: $extrashow
1412: </p>
1413: END
1414: return $result;
1415: }
1416:
1417: # -------------------------------------------------------------- Fielded Format
1418: sub fielded_format_view {
1419: my ($title,$author,$subject,$url,$keywords,$version,
1420: $notes,$shortabstract,$mime,$lang,
1421: $creationdate,$lastrevisiondate,$owner,$copyright,
1422: $hostname,$httphost,$extrashow)=@_;
1423: my $result=<<END;
1424: <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
1425: <br />
1426: <b>Title:</b> $title<br />
1427: <b>Author(s):</b> $author<br />
1428: <b>Subject:</b> $subject<br />
1429: <b>Keyword(s):</b> $keywords<br />
1430: <b>Notes:</b> $notes<br />
1431: <b>MIME Type:</b> $mimetag{$mime}<br />
1432: <b>Language:</b> $language{$lang}<br />
1433: <b>Creation Date:</b> $creationdate<br />
1434: <b>Last Revision Date:</b> $lastrevisiondate<br />
1435: <b>Publisher/Owner:</b> $owner<br />
1436: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
1437: <b>Repository Location:</b> $hostname<br />
1438: <b>Abstract:</b> $shortabstract<br />
1439: $extrashow
1440: </p>
1441: END
1442: return $result;
1443: }
1444:
1445: # -------------------------------------------------------------------- XML/SGML
1446: sub xml_sgml_view {
1447: my ($title,$author,$subject,$url,$keywords,$version,
1448: $notes,$shortabstract,$mime,$lang,
1449: $creationdate,$lastrevisiondate,$owner,$copyright,
1450: $hostname,$httphost,$extrashow)=@_;
1451: my $result=<<END;
1452: <pre>
1453: <LonCapaResource>
1454: <url>$url</url>
1455: <title>$title</title>
1456: <author>$author</author>
1457: <subject>$subject</subject>
1458: <keywords>$keywords</keywords>
1459: <notes>$notes</notes>
1460: <mimeInfo>
1461: <mime>$mime</mime>
1462: <mimetag>$mimetag{$mime}</mimetag>
1463: </mimeInfo>
1464: <languageInfo>
1465: <language>$lang</language>
1466: <languagetag>$language{$lang}</languagetag>
1467: </languageInfo>
1468: <creationdate>$creationdate</creationdate>
1469: <lastrevisiondate>$lastrevisiondate</lastrevisiondate>
1470: <owner>$owner</owner>
1471: <copyrightInfo>
1472: <copyright>$copyright</copyright>
1473: <copyrighttag>$cprtag{$copyright}</copyrighttag>
1474: </copyrightInfo>
1475: <repositoryLocation>$hostname</repositoryLocation>
1476: <shortabstract>$shortabstract</shortabstract>
1477: </LonCapaResource>
1478: </pre>
1479: $extrashow
1480: END
1481: return $result;
1482: }
1483:
1484: # ---------------------------------------------------- see if a field is filled
1485: sub filled {
1486: my ($field)=@_;
1487: if ($field=~/\S/ && $field ne 'any') {
1488: return 1;
1489: }
1490: else {
1491: return 0;
1492: }
1493: }
1494:
1495: # ---------------- Message to output when there are not enough fields filled in
1496: sub output_blank_field_error {
1497: my ($r)=@_;
1498: # make query information persistent to allow for subsequent revision
1499: my $persistent=&make_persistent();
1500:
1501: $r->print(<<BEGINNING);
1502: <html>
1503: <head>
1504: <title>The LearningOnline Network with CAPA</title>
1505: BEGINNING
1506: $r->print(<<RESULTS);
1507: </head>
1508: <body bgcolor="#ffffff">
1509: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1510: <h1>Search Catalog</h1>
1511: <form method="post" action="/adm/searchcat">
1512: $persistent
1513: <input type='button' value='Revise search request'
1514: onClick='this.form.submit();' />
1515: $closebutton
1516: <hr />
1517: <h3>Helpful Message</h3>
1518: <p>
1519: Incorrect search query due to blank entry fields.
1520: You need to fill in the relevant
1521: fields on the search page in order for a query to be
1522: processed.
1523: </p>
1524: </body>
1525: </html>
1526: RESULTS
1527: }
1528:
1529: # ----------------------------------------------------------- Output date error
1530: sub output_date_error {
1531: my ($r,$message)=@_;
1532: # make query information persistent to allow for subsequent revision
1533: my $persistent=&make_persistent();
1534:
1535: $r->print(<<BEGINNING);
1536: <html>
1537: <head>
1538: <title>The LearningOnline Network with CAPA</title>
1539: BEGINNING
1540: $r->print(<<RESULTS);
1541: </head>
1542: <body bgcolor="#ffffff">
1543: <img align='right' src='/adm/lonIcons/lonlogos.gif' />
1544: <h1>Search Catalog</h1>
1545: <form method="post" action="/adm/searchcat">
1546: $persistent
1547: <input type='button' value='Revise search request'
1548: onClick='this.form.submit();' />
1549: $closebutton
1550: <hr />
1551: <h3>Helpful Message</h3>
1552: <p>
1553: $message
1554: </p>
1555: </body>
1556: </html>
1557: RESULTS
1558: }
1559:
1560: # --------- settings whenever the user causes the search window to be launched
1561: sub start_fresh_session {
1562: delete $hash{'mode_catalog'};
1563: map {
1564: if ($_ =~ /^pre_/) {
1565: delete $hash{$_};
1566: }
1567: if ($_ =~ /^store/) {
1568: delete $hash{$_};
1569: }
1570: } keys %hash;
1571: }
1572:
1573: 1;
1574:
1575: __END__
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