1: # The LearningOnline Network
2: # Search Catalog
3: #
4: # 03/08/2001 Scott Harrison
5: # Scott Harrison: 03/12/2001, 03/13/2001, 03/14/2001, 03/15/2001, 03/19/2001
6: # Scott Harrison: 03/20/2001
7: #
8: # Functions
9: #
10: # handler(server reference) : interacts with the Apache server layer
11: # (for /adm/searchcat URLs)
12: # simpletextfield(name,value) : returns HTML formatted string for simple text
13: # field
14: # simplecheckbox(name,value) : returns HTML formatted string for simple
15: # checkbox
16: # searchphrasefield(title,name,value) : returns HTML formatted string for
17: # a search expression phrase field
18: # dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
19: # formatted string
20: # for a calendar date
21: # selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
22: # a selection box field
23: # advancedsearch(server reference, environment reference) : perform a complex
24: # multi-field logical query
25: # filled(field) : determines whether a given field has been filled
26: # basicsearch(server reference, environment reference) : perform a simple
27: # single-field logical query
28: # output_blank_field_error(server reference) : outputs a message saying that
29: # more fields need to be filled in
30: # output_results(output mode,
31: # server reference,
32: # environment reference,
33: # reply list reference) : outputs results from search
34: # build_SQL_query(field name, logic) : builds a SQL query string from a
35: # logical expression with AND/OR keywords
36: # recursive_SQL_query_build(field name, reverse notation expression) :
37: # builds a SQL query string from a reverse notation expression
38: # logical expression with AND/OR keywords
39:
40: package Apache::lonsearchcat;
41:
42: use strict;
43: use Apache::Constants qw(:common);
44: use Apache::lonnet();
45: use Apache::File();
46: use CGI qw(:standard);
47: use Text::Query;
48:
49: my %language;
50: my $scrout;
51: my %metadatafields;
52: my %cprtag;
53: my %mimetag;
54: my $closebutton;
55: my $basicviewselect=<<END;
56: <select name='basicviewselect'>
57: <option value='Detailed Citation View'>Detailed Citation View</option>
58: <option value='Summary View'>Summary View</option>
59: <option value='Fielded Format'>Fielded Format</option>
60: <option value='XML/SGML'>XML/SGML</option>
61: </select>
62: END
63: my $advancedviewselect=<<END;
64: <select name='advancedviewselect'>
65: <option value='Detailed Citation View'>Detailed Citation View</option>
66: <option value='Summary View'>Summary View</option>
67: <option value='Fielded Format'>Fielded Format</option>
68: <option value='XML/SGML'>XML/SGML</option>
69: </select>
70: END
71:
72: sub handler {
73: my $r = shift;
74:
75: # -------------------------------------- see if called from an interactive mode
76: map {
77: my ($name, $value) = split(/=/,$_);
78: $value =~ tr/+/ /;
79: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
80: if ($name eq 'catalogmode') {
81: $ENV{'form.'.$name}=$value;
82: }
83: } (split(/&/,$ENV{'QUERY_STRING'}));
84:
85: $r->content_type('text/html');
86: $r->send_http_header;
87: return OK if $r->header_only;
88:
89: %metadatafields=();
90:
91: my $hidden='';
92: $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';
93: <input type='hidden' name='catalogmode' value='interactive'>
94: END
95:
96: $closebutton=<<END if $ENV{'form.catalogmode'} eq 'interactive';
97: <input type="button" name="close" value="CLOSE" onClick="self.close()">
98: END
99:
100: # ------------------------------------------------ First, check out environment
101: $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
102:
103: # --------------------------------- Compute various listings of metadata values
104:
105: %language=();
106: $language{'any'}='Any language';
107: {
108: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');
109: map {
110: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
111: $language{$1}=$2;
112: } <$fh>;
113: }
114:
115: %cprtag=();
116: $cprtag{'any'}='Any copyright/distribution';
117: {
118: my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
119: map {
120: $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
121: $cprtag{$1}=$2;
122: } <$fh>;
123: }
124:
125: %mimetag=();
126: $mimetag{'any'}='Any type';
127: {
128: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');
129: map {
130: $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp;
131: $mimetag{$1}=".$1 $3";
132: } <$fh>;
133: }
134:
135: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
136: return &basicsearch($r,\%ENV);
137: }
138: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
139: return &advancedsearch($r,\%ENV);
140: }
141:
142: $scrout=''; # building a part of screen output
143: $scrout.=&searchphrasefield('Limit by title','title',
144: $ENV{'form.title'});
145:
146: $scrout.=&searchphrasefield('Limit by author','author',
147: $ENV{'form.author'});
148:
149: $scrout.=&searchphrasefield('Limit by subject','subject',
150: $ENV{'form.subject'});
151:
152: $scrout.=&searchphrasefield('Limit by keywords','keywords',
153: $ENV{'form.keywords'});
154:
155: $scrout.=&searchphrasefield('Limit by URL','url',
156: $ENV{'form.url'});
157:
158: $scrout.=&searchphrasefield('Limit by version','version',
159: $ENV{'form.version'});
160:
161: $scrout.=&searchphrasefield('Limit by notes','notes',
162: $ENV{'form.notes'});
163:
164: $scrout.=&searchphrasefield('Limit by abstract','abstract',
165: $ENV{'form.abstract'});
166:
167: $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
168: $scrout.=&selectbox('Limit by MIME type','mime',
169: $ENV{'form.mime'},%mimetag);
170:
171: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
172:
173: $scrout.=&selectbox('Limit by language','language',
174: $ENV{'form.language'},%language);
175:
176:
177: # ------------------------------------------------ Compute date selection boxes
178: $scrout.=<<CREATIONDATESTART;
179: <p>
180: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
181: </font>
182: <br>
183: between:
184: CREATIONDATESTART
185: $scrout.=&dateboxes('creationdatestart',1,1,1976,
186: $ENV{'form.creationdatestart_month'},
187: $ENV{'form.creationdatestart_day'},
188: $ENV{'form.creationdatestart_year'},
189: );
190: $scrout.=<<CREATIONDATEEND;
191: and:
192: CREATIONDATEEND
193: $scrout.=&dateboxes('creationdateend',12,31,2051,
194: $ENV{'form.creationdateend_month'},
195: $ENV{'form.creationdateend_day'},
196: $ENV{'form.creationdateend_year'},
197: );
198: $scrout.="</p>";
199:
200: $scrout.=<<LASTREVISIONDATESTART;
201: <p>
202: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
203: </b></font>
204: <br>between:
205: LASTREVISIONDATESTART
206: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
207: $ENV{'form.lastrevisiondatestart_month'},
208: $ENV{'form.lastrevisiondatestart_day'},
209: $ENV{'form.lastrevisiondatestart_year'},
210: );
211: $scrout.=<<LASTREVISIONDATEEND;
212: and:
213: LASTREVISIONDATEEND
214: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
215: $ENV{'form.lastrevisiondateend_month'},
216: $ENV{'form.lastrevisiondateend_day'},
217: $ENV{'form.lastrevisiondateend_year'},
218: );
219: $scrout.='</p>';
220:
221: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
222: $ENV{'form.owner'});
223: # $metadatafields{'owner'});
224:
225: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
226: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
227: $ENV{'form.copyright'},%cprtag);
228:
229: # ------------------------------------------- Compute customized metadata field
230: $scrout.=<<CUSTOMMETADATA;
231: <p>
232: <font color="#800000" face="helvetica"><b>LIMIT BY OTHER METADATA FIELDS:</b>
233: </font>
234: For author-specific metadata, enter in an expression in the form of
235: <i>key</i>=<i>value</i> separated by operators such as AND or OR.<br>
236: <b>Example:</b> grandmother=75 OR grandfather=85
237: <br>
238: CUSTOMMETADATA
239: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
240: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
241:
242: # ---------------------------------------------------------------- Print screen
243: $r->print(<<ENDDOCUMENT);
244: <html>
245: <head>
246: <title>The LearningOnline Network with CAPA</title>
247: </head>
248: <body bgcolor="#FFFFFF">
249: <img align=right src=/adm/lonIcons/lonlogos.gif>
250: <h1>Search Catalog</h1>
251: <form method="post" action="/adm/searchcat">
252: $hidden
253: <hr>
254: <h3>Basic Search</h3>
255: <p>
256: Enter terms or phrases separated by search operators
257: such as AND or OR then press SEARCH below. Terms should be specific
258: to the title, author, subject, notes, or abstract information associated
259: with a resource.
260: <br>
261: ENDDOCUMENT
262: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
263: $r->print(' ');
264: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
265: $r->print('<font color="#800000">Title only</font> ');
266: $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
267: $r->print(<<ENDDOCUMENT);
268: <font color="#800000">Search historic archives</font>
269: <br>
270: <input type="submit" name="basicsubmit" value="SEARCH">
271: <input type="reset" name="reset" value="RESET">
272: $closebutton
273: $basicviewselect
274: </p>
275: <hr>
276: <h3>Advanced Search</h3>
277: $scrout
278: <p>
279: <input type="submit" name="advancedsubmit" value="SEARCH">
280: <input type="reset" name="reset" value="RESET">
281: $closebutton
282: $advancedviewselect
283: </p>
284: </form>
285: </body>
286: </html>
287: ENDDOCUMENT
288: return OK;
289: }
290:
291: # --------------------------------------------------------- Various form fields
292:
293: sub simpletextfield {
294: my ($name,$value)=@_;
295: return '<input type=text name="'.$name.'" size=20 value="'.$value.'">';
296: }
297:
298: sub simplecheckbox {
299: my ($name,$value)=@_;
300: my $checked='';
301: $checked="CHECKED" if $value eq 'on';
302: return '<input type=checkbox name="'.$name.'" '. $checked . '>';
303: }
304:
305: sub searchphrasefield {
306: my ($title,$name,$value)=@_;
307: my $instruction=<<END;
308: Enter terms or phrases separated by search operators such
309: as AND or OR.
310: END
311: my $uctitle=uc($title);
312: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
313: "</FONT> $instruction<br>".
314: '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
315: }
316:
317: sub dateboxes {
318: my ($name,$defaultmonth,$defaultday,$defaultyear,
319: $currentmonth,$currentday,$currentyear)=@_;
320: ($defaultmonth,$defaultday,$defaultyear)=('','','');
321: my $month=<<END;
322: <select name="${name}_month">
323: <option value='$defaultmonth'> </option>
324: <option value="1">January</option>
325: <option value="2">February</option>
326: <option value="3">March</option>
327: <option value="4">April</option>
328: <option value="5">May</option>
329: <option value="6">June</option>
330: <option value="7">July</option>
331: <option value="8">August</option>
332: <option value="9">September</option>
333: <option value="10">October</option>
334: <option value="11">November</option>
335: <option value="12">December</option>
336: </select>
337: END
338: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
339: my $day=<<END;
340: <select name="${name}_day">
341: <option value='$defaultday'> </option>
342: <option value="1">1</option>
343: <option value="2">2</option>
344: <option value="3">3</option>
345: <option value="4">4</option>
346: <option value="5">5</option>
347: <option value="6">6</option>
348: <option value="7">7</option>
349: <option value="8">8</option>
350: <option value="9">9</option>
351: <option value="10">10</option>
352: <option value="11">11</option>
353: <option value="12">12</option>
354: <option value="13">13</option>
355: <option value="14">14</option>
356: <option value="15">15</option>
357: <option value="16">16</option>
358: <option value="17">17</option>
359: <option value="18">18</option>
360: <option value="19">19</option>
361: <option value="20">20</option>
362: <option value="21">21</option>
363: <option value="22">22</option>
364: <option value="23">23</option>
365: <option value="24">24</option>
366: <option value="25">25</option>
367: <option value="26">26</option>
368: <option value="27">27</option>
369: <option value="28">28</option>
370: <option value="29">29</option>
371: <option value="30">30</option>
372: <option value="31">31</option>
373: </select>
374: END
375: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
376: my $year=<<END;
377: <select name="${name}_year">
378: <option value='$defaultyear'> </option>
379: <option value="1976">1976</option>
380: <option value="1977">1977</option>
381: <option value="1978">1978</option>
382: <option value="1979">1979</option>
383: <option value="1980">1980</option>
384: <option value="1981">1981</option>
385: <option value="1982">1982</option>
386: <option value="1983">1983</option>
387: <option value="1984">1984</option>
388: <option value="1985">1985</option>
389: <option value="1986">1986</option>
390: <option value="1987">1987</option>
391: <option value="1988">1988</option>
392: <option value="1989">1989</option>
393: <option value="1990">1990</option>
394: <option value="1991">1991</option>
395: <option value="1992">1992</option>
396: <option value="1993">1993</option>
397: <option value="1994">1994</option>
398: <option value="1995">1995</option>
399: <option value="1996">1996</option>
400: <option value="1997">1997</option>
401: <option value="1998">1998</option>
402: <option value="1999">1999</option>
403: <option value="2000">2000</option>
404: <option value="2001">2001</option>
405: <option value="2002">2002</option>
406: <option value="2003">2003</option>
407: <option value="2004">2004</option>
408: <option value="2005">2005</option>
409: <option value="2006">2006</option>
410: <option value="2007">2007</option>
411: <option value="2008">2008</option>
412: <option value="2009">2009</option>
413: <option value="2010">2010</option>
414: <option value="2011">2011</option>
415: <option value="2012">2012</option>
416: <option value="2013">2013</option>
417: <option value="2014">2014</option>
418: <option value="2015">2015</option>
419: <option value="2016">2016</option>
420: <option value="2017">2017</option>
421: <option value="2018">2018</option>
422: <option value="2019">2019</option>
423: <option value="2020">2020</option>
424: <option value="2021">2021</option>
425: <option value="2022">2022</option>
426: <option value="2023">2023</option>
427: <option value="2024">2024</option>
428: <option value="2025">2025</option>
429: <option value="2026">2026</option>
430: <option value="2027">2027</option>
431: <option value="2028">2028</option>
432: <option value="2029">2029</option>
433: <option value="2030">2030</option>
434: <option value="2031">2031</option>
435: <option value="2032">2032</option>
436: <option value="2033">2033</option>
437: <option value="2034">2034</option>
438: <option value="2035">2035</option>
439: <option value="2036">2036</option>
440: <option value="2037">2037</option>
441: <option value="2038">2038</option>
442: <option value="2039">2039</option>
443: <option value="2040">2040</option>
444: <option value="2041">2041</option>
445: <option value="2042">2042</option>
446: <option value="2043">2043</option>
447: <option value="2044">2044</option>
448: <option value="2045">2045</option>
449: <option value="2046">2046</option>
450: <option value="2047">2047</option>
451: <option value="2048">2048</option>
452: <option value="2049">2049</option>
453: <option value="2050">2050</option>
454: <option value="2051">2051</option>
455: </select>
456: END
457: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
458: return "$month$day$year";
459: }
460:
461: sub selectbox {
462: my ($title,$name,$value,%options)=@_;
463: my $uctitle=uc($title);
464: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
465: "</b></font><br>".'<select name="'.$name.'">';
466: map {
467: $selout.='<option value="'.$_.'"';
468: if ($_ eq $value) { $selout.=' selected'; }
469: $selout.='>'.$options{$_}.'</option>';
470: } sort keys %options;
471: return $selout.'</select>';
472: }
473:
474: # ----------------------------------------------- Performing an advanced search
475: sub advancedsearch {
476: my ($r,$envhash)=@_;
477: my %ENV=%{$envhash};
478:
479: my $fillflag=0;
480: # Clean up fields for safety
481: for my $field ('title','author','subject','keywords','url','version',
482: 'creationdatestart_month','creationdatestart_day',
483: 'creationdatestart_year','creationdateend_month',
484: 'creationdateend_day','creationdateend_year',
485: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
486: 'lastrevisiondatestart_year','lastrevisiondateend_month',
487: 'lastrevisiondateend_day','lastrevisiondateend_year',
488: 'notes','abstract','mime','language','owner',
489: 'custommetadata') {
490: $ENV{"form.$field"}=~s/[^\w\s\(\)\-\"\']//g;
491: }
492: for my $field ('title','author','subject','keywords','url','version',
493: 'notes','abstract','mime','language','owner',
494: 'custommetadata') {
495: if (&filled($ENV{"form.$field"})) {
496: $fillflag++;
497: }
498: }
499:
500: unless ($fillflag) {
501: &output_blank_field_error($r);
502: return OK;
503: }
504:
505: my $query='';
506:
507: my @queries;
508: # Go through logical expression AND/OR/NOT phrase fields.
509:
510: foreach my $field ('title','author','subject','notes','abstract','url',
511: 'keywords','version','owner') {
512: if ($ENV{'form.'.$field}) {
513: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
514: }
515: }
516: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
517: push @queries,"(language like \"\%$ENV{'form.language'}\%\")";
518: }
519: if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
520: push @queries,"(mime like \"\%$ENV{'form.mime'}\%\")";
521: }
522: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
523: push @queries,"(copyright like \"\%$ENV{'form.copyright'}\%\")";
524: }
525: my $datequery=&build_date_queries(
526: $ENV{'form.creationdatestart_month'},
527: $ENV{'form.creationdatestart_day'},
528: $ENV{'form.creationdatestart_year'},
529: $ENV{'form.creationdateend_month'},
530: $ENV{'form.creationdateend_day'},
531: $ENV{'form.creationdateend_year'},
532: $ENV{'form.lastrevisiondatestart_month'},
533: $ENV{'form.lastrevisiondatestart_day'},
534: $ENV{'form.lastrevisiondatestart_year'},
535: $ENV{'form.lastrevisiondateend_month'},
536: $ENV{'form.lastrevisiondateend_day'},
537: $ENV{'form.lastrevisiondateend_year'},
538: );
539: if ($datequery=~/^Incorrect/) {
540: &output_date_error($r,$datequery);
541: return OK;
542: }
543: elsif ($datequery) {
544: push @queries,$datequery;
545: }
546: my $customquery;
547: if ($ENV{'form.custommetadata'}) {
548: $customquery=&build_custommetadata_query('custommetadata',
549: $ENV{'form.custommetadata'});
550: }
551: if (@queries) {
552: $query=join(" AND ",@queries);
553: $query="select * from metadata where $query";
554: my $reply=&Apache::lonnet::metadata_query($query);
555: &output_results('Advanced',$r,$envhash,$customquery,$reply);
556: }
557: else {
558: &output_results('Advanced',$r,$envhash,$query);
559: }
560: return OK;
561: }
562:
563: # ---------------------------------------------------- see if a field is filled
564: sub filled {
565: my ($field)=@_;
566: if ($field=~/\S/) {
567: return 1;
568: }
569: else {
570: return 0;
571: }
572: }
573:
574: # --------------------------------------------------- Performing a basic search
575: sub basicsearch {
576: my ($r,$envhash)=@_;
577: my %ENV=%{$envhash};
578:
579: # Clean up fields for safety
580: for my $field ('basicexp') {
581: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
582: }
583:
584: unless (&filled($ENV{'form.basicexp'})) {
585: &output_blank_field_error($r);
586: return OK;
587: }
588:
589: my $query='';
590: my $concatarg=join('," ",',
591: ('title', 'author', 'subject', 'notes', 'abstract'));
592:
593: $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";
594: my $reply=&Apache::lonnet::metadata_query($query);
595: &output_results('Basic',$r,$envhash,$query,$reply);
596: return OK;
597: }
598:
599: # ---------------- Message to output when there are not enough fields filled in
600: sub output_blank_field_error {
601: my ($r)=@_;
602: # make query information persistent to allow for subsequent revision
603: my $persistent='';
604: map {
605: if (/^form\./ && !/submit/) {
606: my $name=$_;
607: my $key=$name;
608: $name=~s/^form\.//;
609: $persistent.=<<END;
610: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
611: END
612: }
613: } (keys %ENV);
614:
615: $r->print(<<BEGINNING);
616: <html>
617: <head>
618: <title>The LearningOnline Network with CAPA</title>
619: BEGINNING
620: $r->print(<<RESULTS);
621: </head>
622: <body bgcolor="#ffffff">
623: <img align=right src=/adm/lonIcons/lonlogos.gif>
624: <h1>Search Catalog</h1>
625: <form method="post" action="/adm/searchcat">
626: $persistent
627: <input type='button' value='Revise search request'
628: onClick='this.form.submit();'>
629: $closebutton
630: <hr>
631: <h3>Helpful Message</h3>
632: <p>
633: Incorrect search query due to blank entry fields.
634: You need to fill in the relevant
635: fields on the search page in order for a query to be
636: processed.
637: </p>
638: </body>
639: </html>
640: RESULTS
641: }
642:
643: # ----------------------------- format and output results based on a reply list
644: sub output_results {
645: my ($mode,$r,$envhash,$query,@replylist)=@_;
646: my %ENV=%{$envhash};
647: my $compiledresult='';
648:
649: foreach my $reply (@replylist) {
650:
651: my @results;
652:
653: my $replyfile='';
654: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
655: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
656: $reply=~/(.*?)\_/;
657: my $hostname=$1;
658: sleep 3; # temporary fix, need to check for completion and status
659: {
660: while (1) {
661: last if -e $replyfile;
662: sleep 1;
663: }
664: # QUESTION: how should I handle this error condition..
665: # I'm sure there is syntax elsewhere I can use..
666: my $fh=Apache::File->new($replyfile) or
667: ($r->print('file cannot be opened') and return OK);
668: @results=<$fh>;
669: }
670:
671: foreach my $result (@results) {
672: my @fields=map
673: {&Apache::lonnet::unescape($_)}
674: (split(/\,/,$result));
675: my ($title,$author,$subject,$url,$keywords,$version,
676: $notes,$abstract,$mime,$lang,
677: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
678: my $shortabstract=$abstract;
679: $shortabstract=substr($abstract,0,200) if length($abstract)>200;
680: $fields[7]=$shortabstract;
681: $compiledresult.=<<END;
682: <p>
683: END
684: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
685: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
686: onClick="javascript:select_data('$title','$url')">
687: </font>
688: <br>
689: END
690: my $httphost=$ENV{'HTTP_HOST'};
691:
692: my $viewselect;
693: if ($mode eq 'Basic') {
694: $viewselect=$ENV{'form.basicviewselect'};
695: }
696: elsif ($mode eq 'Advanced') {
697: $viewselect=$ENV{'form.advancedviewselect'};
698: }
699:
700: if ($viewselect eq 'Detailed Citation View') {
701: $compiledresult.=&detailed_citation_view(@fields,
702: $hostname,$httphost);
703: }
704: elsif ($viewselect eq 'Summary View') {
705: $compiledresult.=&summary_view(@fields,$hostname,$httphost);
706: }
707: elsif ($viewselect eq 'Fielded Format') {
708: $compiledresult.=&fielded_format_view(@fields,$hostname,
709: $httphost);
710: }
711: elsif ($viewselect eq 'XML/SGML') {
712: $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost);
713: }
714:
715: }
716:
717: unless ($compiledresult) {
718: $compiledresult="There were no results that matched your query";
719: }
720:
721: # make query information persistent to allow for subsequent revision
722: my $persistent='';
723: map {
724: if (/^form\./ && !/submit/) {
725: my $name=$_;
726: my $key=$name;
727: $name=~s/^form\.//;
728: $persistent.=<<END;
729: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
730: END
731: }
732: } (keys %ENV);
733:
734: $r->print(<<BEGINNING);
735: <html>
736: <head>
737: <title>The LearningOnline Network with CAPA</title>
738: BEGINNING
739: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
740: <script>
741: function select_data(title,url) {
742: changeTitle(title);
743: changeURL(url);
744: }
745: function changeTitle(val) {
746: if (opener.inf.document.forms.resinfo.elements.t) {
747: opener.inf.document.forms.resinfo.elements.t.value=val;
748: }
749: }
750: function changeURL(val) {
751: if (opener.inf.document.forms.resinfo.elements.u) {
752: opener.inf.document.forms.resinfo.elements.u.value=val;
753: }
754: }
755: </script>
756: SCRIPT
757: $r->print(<<RESULTS);
758: </head>
759: <body bgcolor="#ffffff">
760: <img align=right src=/adm/lonIcons/lonlogos.gif>
761: <h1>Search Catalog</h1>
762: <form method="post" action="/adm/searchcat">
763: <input type='button' value='Revise search request'
764: onClick='this.form.submit();'>
765: $closebutton
766: $persistent
767: <hr>
768: <h3>Search Query</h3>
769: RESULTS
770: if ($mode eq 'Basic') {
771: $r->print(<<RESULTS);
772: <p>
773: <b>Basic search:</b> $ENV{'form.basicexp'}
774: </p>
775: RESULTS
776: }
777: elsif ($mode eq 'Advanced') {
778: $r->print(<<RESULTS);
779: <p>
780: <b>Advanced search</b>
781: $query
782: </p>
783: RESULTS
784: }
785: $r->print(<<RESULTS);
786: <h3>Search Results</h3>
787: $compiledresult
788: </body>
789: </html>
790: RESULTS
791: }
792: }
793:
794: # ------------------------------------------------------------- build_SQL_query
795: sub build_SQL_query {
796: my ($field_name,$logic_statement)=@_;
797: my $q=new Text::Query('abc',
798: -parse => 'Text::Query::ParseAdvanced',
799: -build => 'Text::Query::Build');
800: $q->prepare($logic_statement);
801: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
802: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
803: return $sql_query;
804: }
805:
806: # ------------------------------------------------- build custom metadata query
807: sub build_custommetadata_query {
808: my ($field_name,$logic_statement)=@_;
809: my $q=new Text::Query('abc',
810: -parse => 'Text::Query::ParseAdvanced',
811: -build => 'Text::Query::BuildAdvancedString');
812: $q->prepare($logic_statement);
813: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
814: return $matchexp;
815: }
816:
817: # - Recursively parse a reverse notation expression into a SQL query expression
818: sub recursive_SQL_query_build {
819: my ($dkey,$pattern)=@_;
820: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
821: return $pattern unless @matches;
822: foreach my $match (@matches) {
823: $match=~/\[ (\w+)\s(.*) \]/;
824: my ($key,$value)=($1,$2);
825: my $replacement='';
826: if ($key eq 'literal') {
827: $replacement="($dkey like \"\%$value\%\")";
828: }
829: elsif ($key eq 'and') {
830: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
831: $replacement="($1 AND $2)";
832: }
833: elsif ($key eq 'or') {
834: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
835: $replacement="($1 OR $2)";
836: }
837: substr($pattern,
838: index($pattern,$match),
839: length($match),
840: $replacement
841: );
842: }
843: &recursive_SQL_query_build($dkey,$pattern);
844: }
845:
846: # ------------------------------------------------------ Detailed Citation View
847: sub detailed_citation_view {
848: my ($title,$author,$subject,$url,$keywords,$version,
849: $notes,$shortabstract,$mime,$lang,
850: $creationdate,$lastrevisiondate,$owner,$copyright,
851: $hostname,$httphost)=@_;
852: my $result=<<END;
853: <i>$owner</i>, last revised $lastrevisiondate
854: <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
855: <h3>$author</h3>
856: </p>
857: <p>
858: <b>Subject:</b> $subject<br>
859: <b>Keyword(s):</b> $keywords<br>
860: <b>Notes:</b> $notes<br>
861: <b>MIME Type:</b> $mimetag{$mime}<br>
862: <b>Language:</b> $language{$lang}<br>
863: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br>
864: $shortabstract
865: </p>
866: END
867: return $result;
868: }
869:
870: # ---------------------------------------------------------------- Summary View
871: sub summary_view {
872: my ($title,$author,$subject,$url,$keywords,$version,
873: $notes,$shortabstract,$mime,$lang,
874: $creationdate,$lastrevisiondate,$owner,$copyright,
875: $hostname,$httphost)=@_;
876: my $result=<<END;
877: <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
878: $title<br />
879: $owner -- $lastrevisiondate<br />
880: $cprtag{$copyright}<br />
881: </p>
882: END
883: return $result;
884: }
885:
886: # -------------------------------------------------------------- Fielded Format
887: sub fielded_format_view {
888: my ($title,$author,$subject,$url,$keywords,$version,
889: $notes,$shortabstract,$mime,$lang,
890: $creationdate,$lastrevisiondate,$owner,$copyright,
891: $hostname,$httphost)=@_;
892: my $result=<<END;
893: <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
894: <br />
895: <b>Title:</b> $title<br />
896: <b>Author(s):</b> $author<br />
897: <b>Subject:</b> $subject<br />
898: <b>Keyword(s):</b> $keywords<br />
899: <b>Notes:</b> $notes<br />
900: <b>MIME Type:</b> $mimetag{$mime}<br />
901: <b>Language:</b> $language{$lang}<br />
902: <b>Creation Date:</b> $creationdate<br />
903: <b>Last Revision Date:</b> $lastrevisiondate<br />
904: <b>Publisher/Owner:</b> $owner<br />
905: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
906: <b>Repository Location:</b> $hostname<br />
907: <b>Abstract:</b> $shortabstract<br />
908: </p>
909: END
910: return $result;
911: }
912:
913: # -------------------------------------------------------------------- XML/SGML
914: sub xml_sgml_view {
915: my ($title,$author,$subject,$url,$keywords,$version,
916: $notes,$shortabstract,$mime,$lang,
917: $creationdate,$lastrevisiondate,$owner,$copyright,
918: $hostname,$httphost)=@_;
919: my $result=<<END;
920: <pre>
921: <LonCapaResource>
922: <url>$url</url>
923: <title>$title</title>
924: <author>$author</author>
925: <subject>$subject</subject>
926: <keywords>$keywords</keywords>
927: <notes>$notes</notes>
928: <mimeInfo>
929: <mime>$mime</mime>
930: <mimetag>$mimetag{$mime}</mimetag>
931: </mimeInfo>
932: <languageInfo>
933: <language>$lang</language>
934: <languagetag>$language{$lang}</languagetag>
935: </languageInfo>
936: <creationdate>$creationdate</creationdate>
937: <lastrevisiondate>$lastrevisiondate</lastrevisiondate>
938: <owner>$owner</owner>
939: <copyrightInfo>
940: <copyright>$copyright</copyright>
941: <copyrighttag>$cprtag{$copyright}</copyrighttag>
942: </copyrightInfo>
943: <repositoryLocation>$hostname</repositoryLocation>
944: <shortabstract>$shortabstract</shortabstract>
945: </LonCapaResource>
946: </pre>
947: END
948: return $result;
949: }
950:
951: sub build_date_queries {
952: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
953: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
954: my @queries;
955: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
956: unless ($cmonth1 and $cday1 and $cyear1 and
957: $cmonth2 and $cday2 and $cyear2) {
958: return "Incorrect entry for the creation date. You must specify ".
959: "a starting month, day, and year and an ending month, ".
960: "day, and year.";
961: }
962: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
963: $cnumeric1+=0;
964: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
965: $cnumeric2+=0;
966: if ($cnumeric1>$cnumeric2) {
967: return "Incorrect entry for the creation date. The starting ".
968: "date must occur before the ending date.";
969: }
970: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
971: "$cyear2-$cmonth2-$cday2 23:59:59')";
972: push @queries,$cquery;
973: }
974: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
975: unless ($lmonth1 and $lday1 and $lyear1 and
976: $lmonth2 and $lday2 and $lyear2) {
977: return "Incorrect entry for the last revision date. You must ".
978: "specify a starting month, day, and year and an ending ".
979: "month, day, and year.";
980: }
981: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
982: $lnumeric1+=0;
983: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
984: $lnumeric2+=0;
985: if ($lnumeric1>$lnumeric2) {
986: return "Incorrect entry for the last revision date. The ".
987: "starting date must occur before the ending date.";
988: }
989: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
990: "$lyear2-$lmonth2-$lday2 23:59:59')";
991: push @queries,$lquery;
992: }
993: if (@queries) {
994: return join(" AND ",@queries);
995: }
996: return '';
997: }
998:
999: sub output_date_error {
1000: my ($r,$message)=@_;
1001: # make query information persistent to allow for subsequent revision
1002: my $persistent='';
1003: map {
1004: if (/^form\./ && !/submit/) {
1005: my $name=$_;
1006: my $key=$name;
1007: $name=~s/^form\.//;
1008: $persistent.=<<END;
1009: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
1010: END
1011: }
1012: } (keys %ENV);
1013:
1014: $r->print(<<BEGINNING);
1015: <html>
1016: <head>
1017: <title>The LearningOnline Network with CAPA</title>
1018: BEGINNING
1019: $r->print(<<RESULTS);
1020: </head>
1021: <body bgcolor="#ffffff">
1022: <img align=right src=/adm/lonIcons/lonlogos.gif>
1023: <h1>Search Catalog</h1>
1024: <form method="post" action="/adm/searchcat">
1025: $persistent
1026: <input type='button' value='Revise search request'
1027: onClick='this.form.submit();'>
1028: $closebutton
1029: <hr>
1030: <h3>Helpful Message</h3>
1031: <p>
1032: $message
1033: </p>
1034: </body>
1035: </html>
1036: RESULTS
1037: }
1038:
1039: sub make_persistent {
1040: $ENV{"form.$field"}=~s/\"/\\\"/g;
1041: }
1042: 1;
1043: __END__
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