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 SPECIAL METADATA FIELDS:</b>
233: </font>
234: For resource-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: $scrout.=<<CUSTOMSHOW;
243: <p>
244: <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
245: </font>
246: Enter in a space-separated list of special metadata fields to show
247: in a fielded listing for each record result.
248: <br>
249: CUSTOMSHOW
250: $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
251: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
252:
253: # ---------------------------------------------------------------- Print screen
254: $r->print(<<ENDDOCUMENT);
255: <html>
256: <head>
257: <title>The LearningOnline Network with CAPA</title>
258: </head>
259: <body bgcolor="#FFFFFF">
260: <img align=right src=/adm/lonIcons/lonlogos.gif>
261: <h1>Search Catalog</h1>
262: <form method="post" action="/adm/searchcat">
263: $hidden
264: <hr>
265: <h3>Basic Search</h3>
266: <p>
267: Enter terms or phrases separated by search operators
268: such as AND or OR then press SEARCH below. Terms should be specific
269: to the title, author, subject, notes, or abstract information associated
270: with a resource.
271: <br>
272: ENDDOCUMENT
273: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
274: $r->print(' ');
275: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
276: $r->print('<font color="#800000">Title only</font> ');
277: $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
278: $r->print(<<ENDDOCUMENT);
279: <font color="#800000">Search historic archives</font>
280: <br>
281: <input type="submit" name="basicsubmit" value='SEARCH' />
282: <input type="reset" name="reset" value='RESET' />
283: $closebutton
284: $basicviewselect
285: </p>
286: <hr>
287: <h3>Advanced Search</h3>
288: $scrout
289: <p>
290: <input type="submit" name="advancedsubmit" value='SEARCH' />
291: <input type="reset" name="reset" value='RESET' />
292: $closebutton
293: $advancedviewselect
294: </p>
295: </form>
296: </body>
297: </html>
298: ENDDOCUMENT
299: return OK;
300: }
301:
302: # --------------------------------------------------------- Various form fields
303:
304: sub simpletextfield {
305: my ($name,$value)=@_;
306: return '<input type=text name=\''.$name.
307: '\' size=20 value=\''.$value.'\' />';
308: }
309:
310: sub simplecheckbox {
311: my ($name,$value)=@_;
312: my $checked='';
313: $checked="CHECKED" if $value eq 'on';
314: return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
315: }
316:
317: sub searchphrasefield {
318: my ($title,$name,$value)=@_;
319: my $instruction=<<END;
320: Enter terms or phrases separated by search operators such
321: as AND or OR.
322: END
323: my $uctitle=uc($title);
324: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
325: "</FONT> $instruction<br>".
326: '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
327: }
328:
329: sub dateboxes {
330: my ($name,$defaultmonth,$defaultday,$defaultyear,
331: $currentmonth,$currentday,$currentyear)=@_;
332: ($defaultmonth,$defaultday,$defaultyear)=('','','');
333: my $month=<<END;
334: <select name="${name}_month">
335: <option value='$defaultmonth'> </option>
336: <option value="1">January</option>
337: <option value="2">February</option>
338: <option value="3">March</option>
339: <option value="4">April</option>
340: <option value="5">May</option>
341: <option value="6">June</option>
342: <option value="7">July</option>
343: <option value="8">August</option>
344: <option value="9">September</option>
345: <option value="10">October</option>
346: <option value="11">November</option>
347: <option value="12">December</option>
348: </select>
349: END
350: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
351: my $day=<<END;
352: <select name="${name}_day">
353: <option value='$defaultday'> </option>
354: <option value="1">1</option>
355: <option value="2">2</option>
356: <option value="3">3</option>
357: <option value="4">4</option>
358: <option value="5">5</option>
359: <option value="6">6</option>
360: <option value="7">7</option>
361: <option value="8">8</option>
362: <option value="9">9</option>
363: <option value="10">10</option>
364: <option value="11">11</option>
365: <option value="12">12</option>
366: <option value="13">13</option>
367: <option value="14">14</option>
368: <option value="15">15</option>
369: <option value="16">16</option>
370: <option value="17">17</option>
371: <option value="18">18</option>
372: <option value="19">19</option>
373: <option value="20">20</option>
374: <option value="21">21</option>
375: <option value="22">22</option>
376: <option value="23">23</option>
377: <option value="24">24</option>
378: <option value="25">25</option>
379: <option value="26">26</option>
380: <option value="27">27</option>
381: <option value="28">28</option>
382: <option value="29">29</option>
383: <option value="30">30</option>
384: <option value="31">31</option>
385: </select>
386: END
387: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
388: my $year=<<END;
389: <select name="${name}_year">
390: <option value='$defaultyear'> </option>
391: <option value="1976">1976</option>
392: <option value="1977">1977</option>
393: <option value="1978">1978</option>
394: <option value="1979">1979</option>
395: <option value="1980">1980</option>
396: <option value="1981">1981</option>
397: <option value="1982">1982</option>
398: <option value="1983">1983</option>
399: <option value="1984">1984</option>
400: <option value="1985">1985</option>
401: <option value="1986">1986</option>
402: <option value="1987">1987</option>
403: <option value="1988">1988</option>
404: <option value="1989">1989</option>
405: <option value="1990">1990</option>
406: <option value="1991">1991</option>
407: <option value="1992">1992</option>
408: <option value="1993">1993</option>
409: <option value="1994">1994</option>
410: <option value="1995">1995</option>
411: <option value="1996">1996</option>
412: <option value="1997">1997</option>
413: <option value="1998">1998</option>
414: <option value="1999">1999</option>
415: <option value="2000">2000</option>
416: <option value="2001">2001</option>
417: <option value="2002">2002</option>
418: <option value="2003">2003</option>
419: <option value="2004">2004</option>
420: <option value="2005">2005</option>
421: <option value="2006">2006</option>
422: <option value="2007">2007</option>
423: <option value="2008">2008</option>
424: <option value="2009">2009</option>
425: <option value="2010">2010</option>
426: <option value="2011">2011</option>
427: <option value="2012">2012</option>
428: <option value="2013">2013</option>
429: <option value="2014">2014</option>
430: <option value="2015">2015</option>
431: <option value="2016">2016</option>
432: <option value="2017">2017</option>
433: <option value="2018">2018</option>
434: <option value="2019">2019</option>
435: <option value="2020">2020</option>
436: <option value="2021">2021</option>
437: <option value="2022">2022</option>
438: <option value="2023">2023</option>
439: <option value="2024">2024</option>
440: <option value="2025">2025</option>
441: <option value="2026">2026</option>
442: <option value="2027">2027</option>
443: <option value="2028">2028</option>
444: <option value="2029">2029</option>
445: <option value="2030">2030</option>
446: <option value="2031">2031</option>
447: <option value="2032">2032</option>
448: <option value="2033">2033</option>
449: <option value="2034">2034</option>
450: <option value="2035">2035</option>
451: <option value="2036">2036</option>
452: <option value="2037">2037</option>
453: <option value="2038">2038</option>
454: <option value="2039">2039</option>
455: <option value="2040">2040</option>
456: <option value="2041">2041</option>
457: <option value="2042">2042</option>
458: <option value="2043">2043</option>
459: <option value="2044">2044</option>
460: <option value="2045">2045</option>
461: <option value="2046">2046</option>
462: <option value="2047">2047</option>
463: <option value="2048">2048</option>
464: <option value="2049">2049</option>
465: <option value="2050">2050</option>
466: <option value="2051">2051</option>
467: </select>
468: END
469: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
470: return "$month$day$year";
471: }
472:
473: sub selectbox {
474: my ($title,$name,$value,%options)=@_;
475: my $uctitle=uc($title);
476: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
477: "</b></font><br>".'<select name="'.$name.'">';
478: map {
479: $selout.='<option value=\''.$_.'\'';
480: if ($_ eq $value) { $selout.=' selected'; }
481: $selout.='>'.$options{$_}.'</option>';
482: } sort keys %options;
483: return $selout.'</select>';
484: }
485:
486: # ----------------------------------------------- Performing an advanced search
487: sub advancedsearch {
488: my ($r,$envhash)=@_;
489: my %ENV=%{$envhash};
490:
491: my $fillflag=0;
492: # Clean up fields for safety
493: for my $field ('title','author','subject','keywords','url','version',
494: 'creationdatestart_month','creationdatestart_day',
495: 'creationdatestart_year','creationdateend_month',
496: 'creationdateend_day','creationdateend_year',
497: 'lastrevisiondatestart_month','lastrevisiondatestart_day',
498: 'lastrevisiondatestart_year','lastrevisiondateend_month',
499: 'lastrevisiondateend_day','lastrevisiondateend_year',
500: 'notes','abstract','mime','language','owner',
501: 'custommetadata','customshow') {
502: $ENV{"form.$field"}=~s/[^\w\s\(\)\=\-\"\']//g;
503: }
504: for my $field ('title','author','subject','keywords','url','version',
505: 'notes','abstract','mime','language','owner',
506: 'custommetadata') {
507: if (&filled($ENV{"form.$field"})) {
508: $fillflag++;
509: }
510: }
511:
512: unless ($fillflag) {
513: &output_blank_field_error($r);
514: return OK;
515: }
516:
517: my $query='';
518:
519: my @queries;
520: # Go through logical expression AND/OR/NOT phrase fields.
521:
522: foreach my $field ('title','author','subject','notes','abstract','url',
523: 'keywords','version','owner') {
524: if ($ENV{'form.'.$field}) {
525: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
526: }
527: }
528: if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
529: push @queries,"(language like \"\%$ENV{'form.language'}\%\")";
530: }
531: if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
532: push @queries,"(mime like \"\%$ENV{'form.mime'}\%\")";
533: }
534: if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
535: push @queries,"(copyright like \"\%$ENV{'form.copyright'}\%\")";
536: }
537: my $datequery=&build_date_queries(
538: $ENV{'form.creationdatestart_month'},
539: $ENV{'form.creationdatestart_day'},
540: $ENV{'form.creationdatestart_year'},
541: $ENV{'form.creationdateend_month'},
542: $ENV{'form.creationdateend_day'},
543: $ENV{'form.creationdateend_year'},
544: $ENV{'form.lastrevisiondatestart_month'},
545: $ENV{'form.lastrevisiondatestart_day'},
546: $ENV{'form.lastrevisiondatestart_year'},
547: $ENV{'form.lastrevisiondateend_month'},
548: $ENV{'form.lastrevisiondateend_day'},
549: $ENV{'form.lastrevisiondateend_year'},
550: );
551: if ($datequery=~/^Incorrect/) {
552: &output_date_error($r,$datequery);
553: return OK;
554: }
555: elsif ($datequery) {
556: push @queries,$datequery;
557: }
558: my $customquery='';
559: if ($ENV{'form.custommetadata'}) {
560: $customquery=&build_custommetadata_query('custommetadata',
561: $ENV{'form.custommetadata'});
562: }
563: if (@queries) {
564: $query=join(" AND ",@queries);
565: $query="select * from metadata where $query";
566: my $reply='';
567: unless ($customquery) {
568: $reply=&Apache::lonnet::metadata_query($query);
569: }
570: else {
571: $reply=&Apache::lonnet::metadata_query($query,$customquery);
572: }
573: &output_results('Advanced',$r,$envhash,$customquery,$reply);
574: }
575: else {
576: &output_results('Advanced',$r,$envhash,$query);
577: }
578: return OK;
579: }
580:
581: # ---------------------------------------------------- see if a field is filled
582: sub filled {
583: my ($field)=@_;
584: if ($field=~/\S/) {
585: return 1;
586: }
587: else {
588: return 0;
589: }
590: }
591:
592: # --------------------------------------------------- Performing a basic search
593: sub basicsearch {
594: my ($r,$envhash)=@_;
595: my %ENV=%{$envhash};
596:
597: # Clean up fields for safety
598: for my $field ('basicexp') {
599: $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
600: }
601:
602: unless (&filled($ENV{'form.basicexp'})) {
603: &output_blank_field_error($r);
604: return OK;
605: }
606:
607: my $query='';
608: my $concatarg=join('," ",',
609: ('title', 'author', 'subject', 'notes', 'abstract'));
610:
611: $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";
612: my $reply=&Apache::lonnet::metadata_query($query);
613: &output_results('Basic',$r,$envhash,$query,$reply);
614: return OK;
615: }
616:
617: # ---------------- Message to output when there are not enough fields filled in
618: sub output_blank_field_error {
619: my ($r)=@_;
620: # make query information persistent to allow for subsequent revision
621: my $persistent=&make_persistent();
622:
623: $r->print(<<BEGINNING);
624: <html>
625: <head>
626: <title>The LearningOnline Network with CAPA</title>
627: BEGINNING
628: $r->print(<<RESULTS);
629: </head>
630: <body bgcolor="#ffffff">
631: <img align=right src=/adm/lonIcons/lonlogos.gif>
632: <h1>Search Catalog</h1>
633: <form method="post" action="/adm/searchcat">
634: $persistent
635: <input type='button' value='Revise search request'
636: onClick='this.form.submit();'>
637: $closebutton
638: <hr>
639: <h3>Helpful Message</h3>
640: <p>
641: Incorrect search query due to blank entry fields.
642: You need to fill in the relevant
643: fields on the search page in order for a query to be
644: processed.
645: </p>
646: </body>
647: </html>
648: RESULTS
649: }
650:
651: # ----------------------------- format and output results based on a reply list
652: sub output_results {
653: my ($mode,$r,$envhash,$query,@replylist)=@_;
654: my %ENV=%{$envhash};
655: my $compiledresult='';
656:
657: foreach my $reply (@replylist) {
658:
659: my @results;
660:
661: my $replyfile='';
662: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
663: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
664: $reply=~/(.*?)\_/;
665: my $hostname=$1;
666: sleep 3; # temporary fix, need to check for completion and status
667: {
668: while (1) {
669: last if -e $replyfile;
670: sleep 1;
671: }
672: # QUESTION: how should I handle this error condition..
673: # I'm sure there is syntax elsewhere I can use..
674: my $fh=Apache::File->new($replyfile) or
675: ($r->print('file cannot be opened') and return OK);
676: @results=<$fh>;
677: }
678:
679: my $customshow='';
680: my $extrashow='';
681: if ($ENV{'form.customshow'}) {
682: $customshow=$ENV{'form.customshow'};
683: $customshow=~s/[^\w\s]//g;
684: my @fields=map {"<font color=\"#008000\">$_:</font>"}
685: split(/\s+/,$customshow);
686: $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
687: }
688: foreach my $result (@results) {
689: my @fields=map
690: {&Apache::lonnet::unescape($_)}
691: (split(/\,/,$result));
692: my ($title,$author,$subject,$url,$keywords,$version,
693: $notes,$abstract,$mime,$lang,
694: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
695: my $shortabstract=$abstract;
696: $shortabstract=substr($abstract,0,200) if length($abstract)>200;
697: $fields[7]=$shortabstract;
698: $compiledresult.=<<END;
699: <p>
700: END
701: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
702: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
703: onClick="javascript:select_data('$title','$url')">
704: </font>
705: <br>
706: END
707: my $httphost=$ENV{'HTTP_HOST'};
708:
709: my $viewselect;
710: if ($mode eq 'Basic') {
711: $viewselect=$ENV{'form.basicviewselect'};
712: }
713: elsif ($mode eq 'Advanced') {
714: $viewselect=$ENV{'form.advancedviewselect'};
715: }
716:
717: if ($viewselect eq 'Detailed Citation View') {
718: $compiledresult.=&detailed_citation_view(@fields,
719: $hostname,$httphost,
720: $extrashow);
721: }
722: elsif ($viewselect eq 'Summary View') {
723: $compiledresult.=&summary_view(@fields,$hostname,$httphost,
724: $extrashow);
725: }
726: elsif ($viewselect eq 'Fielded Format') {
727: $compiledresult.=&fielded_format_view(@fields,$hostname,
728: $httphost,$extrashow);
729: }
730: elsif ($viewselect eq 'XML/SGML') {
731: $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,
732: $extrashow);
733: }
734:
735: }
736:
737: unless ($compiledresult) {
738: $compiledresult="There were no results that matched your query";
739: }
740:
741: # make query information persistent to allow for subsequent revision
742: my $persistent=&make_persistent();
743:
744: $r->print(<<BEGINNING);
745: <html>
746: <head>
747: <title>The LearningOnline Network with CAPA</title>
748: BEGINNING
749: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
750: <script>
751: function select_data(title,url) {
752: changeTitle(title);
753: changeURL(url);
754: }
755: function changeTitle(val) {
756: if (opener.inf.document.forms.resinfo.elements.t) {
757: opener.inf.document.forms.resinfo.elements.t.value=val;
758: }
759: }
760: function changeURL(val) {
761: if (opener.inf.document.forms.resinfo.elements.u) {
762: opener.inf.document.forms.resinfo.elements.u.value=val;
763: }
764: }
765: </script>
766: SCRIPT
767: $r->print(<<RESULTS);
768: </head>
769: <body bgcolor="#ffffff">
770: <img align=right src=/adm/lonIcons/lonlogos.gif>
771: <h1>Search Catalog</h1>
772: <form method="post" action="/adm/searchcat">
773: <input type='button' value='Revise search request'
774: onClick='this.form.submit();'>
775: $closebutton
776: $persistent
777: <hr>
778: <h3>Search Query</h3>
779: RESULTS
780: if ($mode eq 'Basic') {
781: $r->print(<<RESULTS);
782: <p>
783: <b>Basic search:</b> $ENV{'form.basicexp'}
784: </p>
785: RESULTS
786: }
787: elsif ($mode eq 'Advanced') {
788: $r->print(<<RESULTS);
789: <p>
790: <b>Advanced search</b>
791: $query
792: </p>
793: RESULTS
794: }
795: $r->print(<<RESULTS);
796: <h3>Search Results</h3>
797: $compiledresult
798: </body>
799: </html>
800: RESULTS
801: }
802: }
803:
804: # ------------------------------------------------------------- build_SQL_query
805: sub build_SQL_query {
806: my ($field_name,$logic_statement)=@_;
807: my $q=new Text::Query('abc',
808: -parse => 'Text::Query::ParseAdvanced',
809: -build => 'Text::Query::Build');
810: $q->prepare($logic_statement);
811: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
812: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
813: return $sql_query;
814: }
815:
816: # ------------------------------------------------- build custom metadata query
817: sub build_custommetadata_query {
818: my ($field_name,$logic_statement)=@_;
819: my $q=new Text::Query('abc',
820: -parse => 'Text::Query::ParseAdvanced',
821: -build => 'Text::Query::BuildAdvancedString');
822: $q->prepare($logic_statement);
823: my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
824: # quick fix to change literal into xml tag-matching
825: # will eventually have to write a separate builder module
826: my $oldmatchexp=$matchexp;
827: $matchexp=~s/(\w+)\\\=(\w+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
828: return $matchexp;
829: }
830:
831: # - Recursively parse a reverse notation expression into a SQL query expression
832: sub recursive_SQL_query_build {
833: my ($dkey,$pattern)=@_;
834: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
835: return $pattern unless @matches;
836: foreach my $match (@matches) {
837: $match=~/\[ (\w+)\s(.*) \]/;
838: my ($key,$value)=($1,$2);
839: my $replacement='';
840: if ($key eq 'literal') {
841: $replacement="($dkey like \"\%$value\%\")";
842: }
843: elsif ($key eq 'and') {
844: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
845: $replacement="($1 AND $2)";
846: }
847: elsif ($key eq 'or') {
848: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
849: $replacement="($1 OR $2)";
850: }
851: substr($pattern,
852: index($pattern,$match),
853: length($match),
854: $replacement
855: );
856: }
857: &recursive_SQL_query_build($dkey,$pattern);
858: }
859:
860: # ------------------------------------------------------ Detailed Citation View
861: sub detailed_citation_view {
862: my ($title,$author,$subject,$url,$keywords,$version,
863: $notes,$shortabstract,$mime,$lang,
864: $creationdate,$lastrevisiondate,$owner,$copyright,
865: $hostname,$httphost,$extrashow)=@_;
866: my $result=<<END;
867: <i>$owner</i>, last revised $lastrevisiondate
868: <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
869: <h3>$author</h3>
870: </p>
871: <p>
872: <b>Subject:</b> $subject<br>
873: <b>Keyword(s):</b> $keywords<br>
874: <b>Notes:</b> $notes<br>
875: <b>MIME Type:</b> $mimetag{$mime}<br>
876: <b>Language:</b> $language{$lang}<br>
877: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br>
878: $extrashow
879: $shortabstract
880: </p>
881: END
882: return $result;
883: }
884:
885: # ---------------------------------------------------------------- Summary View
886: sub summary_view {
887: my ($title,$author,$subject,$url,$keywords,$version,
888: $notes,$shortabstract,$mime,$lang,
889: $creationdate,$lastrevisiondate,$owner,$copyright,
890: $hostname,$httphost,$extrashow)=@_;
891: my $result=<<END;
892: <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
893: $title<br />
894: $owner -- $lastrevisiondate<br />
895: $cprtag{$copyright}<br />
896: $extrashow
897: </p>
898: END
899: return $result;
900: }
901:
902: # -------------------------------------------------------------- Fielded Format
903: sub fielded_format_view {
904: my ($title,$author,$subject,$url,$keywords,$version,
905: $notes,$shortabstract,$mime,$lang,
906: $creationdate,$lastrevisiondate,$owner,$copyright,
907: $hostname,$httphost,$extrashow)=@_;
908: my $result=<<END;
909: <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
910: <br />
911: <b>Title:</b> $title<br />
912: <b>Author(s):</b> $author<br />
913: <b>Subject:</b> $subject<br />
914: <b>Keyword(s):</b> $keywords<br />
915: <b>Notes:</b> $notes<br />
916: <b>MIME Type:</b> $mimetag{$mime}<br />
917: <b>Language:</b> $language{$lang}<br />
918: <b>Creation Date:</b> $creationdate<br />
919: <b>Last Revision Date:</b> $lastrevisiondate<br />
920: <b>Publisher/Owner:</b> $owner<br />
921: <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
922: <b>Repository Location:</b> $hostname<br />
923: <b>Abstract:</b> $shortabstract<br />
924: $extrashow
925: </p>
926: END
927: return $result;
928: }
929:
930: # -------------------------------------------------------------------- XML/SGML
931: sub xml_sgml_view {
932: my ($title,$author,$subject,$url,$keywords,$version,
933: $notes,$shortabstract,$mime,$lang,
934: $creationdate,$lastrevisiondate,$owner,$copyright,
935: $hostname,$httphost,$extrashow)=@_;
936: my $result=<<END;
937: <pre>
938: <LonCapaResource>
939: <url>$url</url>
940: <title>$title</title>
941: <author>$author</author>
942: <subject>$subject</subject>
943: <keywords>$keywords</keywords>
944: <notes>$notes</notes>
945: <mimeInfo>
946: <mime>$mime</mime>
947: <mimetag>$mimetag{$mime}</mimetag>
948: </mimeInfo>
949: <languageInfo>
950: <language>$lang</language>
951: <languagetag>$language{$lang}</languagetag>
952: </languageInfo>
953: <creationdate>$creationdate</creationdate>
954: <lastrevisiondate>$lastrevisiondate</lastrevisiondate>
955: <owner>$owner</owner>
956: <copyrightInfo>
957: <copyright>$copyright</copyright>
958: <copyrighttag>$cprtag{$copyright}</copyrighttag>
959: </copyrightInfo>
960: <repositoryLocation>$hostname</repositoryLocation>
961: <shortabstract>$shortabstract</shortabstract>
962: </LonCapaResource>
963: </pre>
964: $extrashow
965: END
966: return $result;
967: }
968:
969: sub build_date_queries {
970: my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
971: $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
972: my @queries;
973: if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
974: unless ($cmonth1 and $cday1 and $cyear1 and
975: $cmonth2 and $cday2 and $cyear2) {
976: return "Incorrect entry for the creation date. You must specify ".
977: "a starting month, day, and year and an ending month, ".
978: "day, and year.";
979: }
980: my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
981: $cnumeric1+=0;
982: my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
983: $cnumeric2+=0;
984: if ($cnumeric1>$cnumeric2) {
985: return "Incorrect entry for the creation date. The starting ".
986: "date must occur before the ending date.";
987: }
988: my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
989: "$cyear2-$cmonth2-$cday2 23:59:59')";
990: push @queries,$cquery;
991: }
992: if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
993: unless ($lmonth1 and $lday1 and $lyear1 and
994: $lmonth2 and $lday2 and $lyear2) {
995: return "Incorrect entry for the last revision date. You must ".
996: "specify a starting month, day, and year and an ending ".
997: "month, day, and year.";
998: }
999: my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
1000: $lnumeric1+=0;
1001: my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
1002: $lnumeric2+=0;
1003: if ($lnumeric1>$lnumeric2) {
1004: return "Incorrect entry for the last revision date. The ".
1005: "starting date must occur before the ending date.";
1006: }
1007: my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
1008: "$lyear2-$lmonth2-$lday2 23:59:59')";
1009: push @queries,$lquery;
1010: }
1011: if (@queries) {
1012: return join(" AND ",@queries);
1013: }
1014: return '';
1015: }
1016:
1017: sub output_date_error {
1018: my ($r,$message)=@_;
1019: # make query information persistent to allow for subsequent revision
1020: my $persistent=&make_persistent();
1021:
1022: $r->print(<<BEGINNING);
1023: <html>
1024: <head>
1025: <title>The LearningOnline Network with CAPA</title>
1026: BEGINNING
1027: $r->print(<<RESULTS);
1028: </head>
1029: <body bgcolor="#ffffff">
1030: <img align=right src=/adm/lonIcons/lonlogos.gif>
1031: <h1>Search Catalog</h1>
1032: <form method="post" action="/adm/searchcat">
1033: $persistent
1034: <input type='button' value='Revise search request'
1035: onClick='this.form.submit();'>
1036: $closebutton
1037: <hr>
1038: <h3>Helpful Message</h3>
1039: <p>
1040: $message
1041: </p>
1042: </body>
1043: </html>
1044: RESULTS
1045: }
1046:
1047: sub make_persistent {
1048: my $persistent='';
1049:
1050: map {
1051: if (/^form\./ && !/submit/) {
1052: my $name=$_;
1053: my $key=$name;
1054: $ENV{$key}=~s/\'//g; # do not mess with html field syntax
1055: $name=~s/^form\.//;
1056: $persistent.=<<END;
1057: <input type='hidden' name='$name' value='$ENV{$key}' />
1058: END
1059: }
1060: } (keys %ENV);
1061: return $persistent;
1062: }
1063: 1;
1064: __END__
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