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 $viewselect=<<END;
56: <select name='view'>
57: <option value='Detailed View'>Detailed View</option>
58: <option value='Brief View'>Brief View</option>
59: </select>
60: END
61:
62: sub handler {
63: my $r = shift;
64:
65: # -------------------------------------- see if called from an interactive mode
66: map {
67: my ($name, $value) = split(/=/,$_);
68: $value =~ tr/+/ /;
69: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
70: if ($name eq 'catalogmode') {
71: $ENV{'form.'.$name}=$value;
72: }
73: } (split(/&/,$ENV{'QUERY_STRING'}));
74:
75: $r->content_type('text/html');
76: $r->send_http_header;
77: return OK if $r->header_only;
78:
79: %metadatafields=();
80:
81: my $hidden='';
82: $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';
83: <input type='hidden' name='catalogmode' value='interactive'>
84: END
85:
86: $closebutton=<<END if $ENV{'form.catalogmode'} eq 'interactive';
87: <input type="button" name="close" value="CLOSE" onClick="self.close()">
88: END
89:
90: # ------------------------------------------------ First, check out environment
91: $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
92:
93: # --------------------------------- Compute various listings of metadata values
94:
95: %language=();
96: $language{'any'}='Any language';
97: {
98: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');
99: map {
100: $_=~/(\w+)\s+([\w\s\-]+)/;
101: $language{$1}=$2;
102: } <$fh>;
103: }
104:
105: %cprtag=();
106: $cprtag{'any'}='Any copyright/distribution';
107: {
108: my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
109: map {
110: $_=~/(\w+)\s+([\w\s\-]+)/;
111: $cprtag{$1}=$2;
112: } <$fh>;
113: }
114:
115: %mimetag=();
116: $mimetag{'any'}='Any type';
117: {
118: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');
119: map {
120: $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;
121: $mimetag{$1}=".$1 $3";
122: } <$fh>;
123: }
124:
125: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
126: return &basicsearch($r,\%ENV);
127: }
128: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
129: return &advancedsearch($r,\%ENV);
130: }
131:
132: $scrout=''; # building a part of screen output
133: $scrout.=&searchphrasefield('Limit by title','title',
134: $ENV{'form.title'});
135:
136: $scrout.=&searchphrasefield('Limit by author','author',
137: $ENV{'form.author'});
138:
139: $scrout.=&searchphrasefield('Limit by subject','subject',
140: $ENV{'form.subject'});
141:
142: $scrout.=&searchphrasefield('Limit by keywords','keywords',
143: $ENV{'form.keywords'});
144:
145: $scrout.=&searchphrasefield('Limit by URL','url',
146: $ENV{'form.url'});
147:
148: $scrout.=&searchphrasefield('Limit by version','version',
149: $ENV{'form.version'});
150:
151: $scrout.=&searchphrasefield('Limit by notes','notes',
152: $ENV{'form.notes'});
153:
154: $scrout.=&searchphrasefield('Limit by abstract','abstract',
155: $ENV{'form.abstract'});
156:
157: $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
158: $scrout.=&selectbox('Limit by MIME type','mime',
159: $ENV{'form.mime'},%mimetag);
160:
161: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
162:
163: $scrout.=&selectbox('Limit by language','language',
164: $ENV{'form.language'},%language);
165:
166:
167: # ------------------------------------------------ Compute date selection boxes
168: $scrout.=<<CREATIONDATESTART;
169: <p>
170: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
171: </font>
172: <br>
173: between:
174: CREATIONDATESTART
175: $scrout.=&dateboxes('creationdatestart',1,1,1976,
176: $ENV{'form.creationdatestart_month'},
177: $ENV{'form.creationdatestart_day'},
178: $ENV{'form.creationdatestart_year'},
179: );
180: $scrout.=<<CREATIONDATEEND;
181: and:
182: CREATIONDATEEND
183: $scrout.=&dateboxes('creationdateend',12,31,2051,
184: $ENV{'form.creationdateend_month'},
185: $ENV{'form.creationdateend_day'},
186: $ENV{'form.creationdateend_year'},
187: );
188: $scrout.="</p>";
189:
190: $scrout.=<<LASTREVISIONDATESTART;
191: <p>
192: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
193: </b></font>
194: <br>between:
195: LASTREVISIONDATESTART
196: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
197: $ENV{'form.lastrevisiondatestart_month'},
198: $ENV{'form.lastrevisiondatestart_day'},
199: $ENV{'form.lastrevisiondatestart_year'},
200: );
201: $scrout.=<<LASTREVISIONDATEEND;
202: and:
203: LASTREVISIONDATEEND
204: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
205: $ENV{'form.lastrevisiondateend_month'},
206: $ENV{'form.lastrevisiondateend_day'},
207: $ENV{'form.lastrevisiondateend_year'},
208: );
209: $scrout.='</p>';
210:
211: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
212: $ENV{'form.owner'});
213: # $metadatafields{'owner'});
214:
215: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
216: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
217: $ENV{'form.copyright'},%cprtag);
218:
219: # ------------------------------------------- Compute customized metadata field
220: $scrout.=<<CUSTOMMETADATA;
221: <p>
222: <font color="#800000" face="helvetica"><b>LIMIT BY OTHER METADATA FIELDS:</b>
223: </font>
224: For author-specific metadata, enter in an expression in the form of
225: <i>key</i>=<i>value</i> separated by operators such as AND or OR.<br>
226: <b>Example:</b> grandmother=75 OR grandfather=85
227: <br>
228: CUSTOMMETADATA
229: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
230: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
231:
232: # ---------------------------------------------------------------- Print screen
233: $r->print(<<ENDDOCUMENT);
234: <html>
235: <head>
236: <title>The LearningOnline Network with CAPA</title>
237: </head>
238: <body bgcolor="#FFFFFF">
239: <img align=right src=/adm/lonIcons/lonlogos.gif>
240: <h1>Search Catalog</h1>
241: <form method="post" action="/adm/searchcat">
242: $hidden
243: <hr>
244: <h3>Basic Search</h3>
245: <p>
246: Enter terms or phrases separated by search operators
247: such as AND or OR then press SEARCH below. Terms should be specific
248: to the title, author, subject, notes, or abstract information associated
249: with a resource.
250: <br>
251: ENDDOCUMENT
252: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
253: $r->print(' ');
254: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
255: $r->print('<font color="#800000">Title only</font> ');
256: $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
257: $r->print(<<ENDDOCUMENT);
258: <font color="#800000">Search historic archives</font>
259: <br>
260: <input type="submit" name="basicsubmit" value="SEARCH">
261: <input type="reset" name="reset" value="RESET">
262: $closebutton
263: $viewselect
264: </p>
265: <hr>
266: <h3>Advanced Search</h3>
267: $scrout
268: <p>
269: <input type="submit" name="advancedsubmit" value="SEARCH">
270: <input type="reset" name="reset" value="RESET">
271: $closebutton
272: $viewselect
273: </p>
274: </form>
275: </body>
276: </html>
277: ENDDOCUMENT
278: return OK;
279: }
280:
281: # --------------------------------------------------------- Various form fields
282:
283: sub simpletextfield {
284: my ($name,$value)=@_;
285: return '<input type=text name="'.$name.'" size=20 value="'.$value.'">';
286: }
287:
288: sub simplecheckbox {
289: my ($name,$value)=@_;
290: my $checked='';
291: $checked="CHECKED" if $value eq 'on';
292: return '<input type=checkbox name="'.$name.'" '. $checked . '>';
293: }
294:
295: sub searchphrasefield {
296: my ($title,$name,$value)=@_;
297: my $instruction=<<END;
298: Enter terms or phrases separated by search operators such
299: as AND or OR.
300: END
301: my $uctitle=uc($title);
302: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
303: "</FONT> $instruction<br>".
304: '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
305: }
306:
307: sub dateboxes {
308: my ($name,$defaultmonth,$defaultday,$defaultyear,
309: $currentmonth,$currentday,$currentyear)=@_;
310: ($defaultmonth,$defaultday,$defaultyear)=('','','');
311: my $month=<<END;
312: <select name="${name}_month">
313: <option value='$defaultmonth'> </option>
314: <option value="1">January</option>
315: <option value="2">February</option>
316: <option value="3">March</option>
317: <option value="4">April</option>
318: <option value="5">May</option>
319: <option value="6">June</option>
320: <option value="7">July</option>
321: <option value="8">August</option>
322: <option value="9">September</option>
323: <option value="10">October</option>
324: <option value="11">November</option>
325: <option value="12">December</option>
326: </select>
327: END
328: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
329: my $day=<<END;
330: <select name="${name}_day">
331: <option value='$defaultday'> </option>
332: <option value="1">1</option>
333: <option value="2">2</option>
334: <option value="3">3</option>
335: <option value="4">4</option>
336: <option value="5">5</option>
337: <option value="6">6</option>
338: <option value="7">7</option>
339: <option value="8">8</option>
340: <option value="9">9</option>
341: <option value="10">10</option>
342: <option value="11">11</option>
343: <option value="12">12</option>
344: <option value="13">13</option>
345: <option value="14">14</option>
346: <option value="15">15</option>
347: <option value="16">16</option>
348: <option value="17">17</option>
349: <option value="18">18</option>
350: <option value="19">19</option>
351: <option value="20">20</option>
352: <option value="21">21</option>
353: <option value="22">22</option>
354: <option value="23">23</option>
355: <option value="24">24</option>
356: <option value="25">25</option>
357: <option value="26">26</option>
358: <option value="27">27</option>
359: <option value="28">28</option>
360: <option value="29">29</option>
361: <option value="30">30</option>
362: <option value="31">31</option>
363: </select>
364: END
365: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
366: my $year=<<END;
367: <select name="${name}_year">
368: <option value='$defaultyear'> </option>
369: <option value="1976">1976</option>
370: <option value="1977">1977</option>
371: <option value="1978">1978</option>
372: <option value="1979">1979</option>
373: <option value="1980">1980</option>
374: <option value="1981">1981</option>
375: <option value="1982">1982</option>
376: <option value="1983">1983</option>
377: <option value="1984">1984</option>
378: <option value="1985">1985</option>
379: <option value="1986">1986</option>
380: <option value="1987">1987</option>
381: <option value="1988">1988</option>
382: <option value="1989">1989</option>
383: <option value="1990">1990</option>
384: <option value="1991">1991</option>
385: <option value="1992">1992</option>
386: <option value="1993">1993</option>
387: <option value="1994">1994</option>
388: <option value="1995">1995</option>
389: <option value="1996">1996</option>
390: <option value="1997">1997</option>
391: <option value="1998">1998</option>
392: <option value="1999">1999</option>
393: <option value="2000">2000</option>
394: <option value="2001">2001</option>
395: <option value="2002">2002</option>
396: <option value="2003">2003</option>
397: <option value="2004">2004</option>
398: <option value="2005">2005</option>
399: <option value="2006">2006</option>
400: <option value="2007">2007</option>
401: <option value="2008">2008</option>
402: <option value="2009">2009</option>
403: <option value="2010">2010</option>
404: <option value="2011">2011</option>
405: <option value="2012">2012</option>
406: <option value="2013">2013</option>
407: <option value="2014">2014</option>
408: <option value="2015">2015</option>
409: <option value="2016">2016</option>
410: <option value="2017">2017</option>
411: <option value="2018">2018</option>
412: <option value="2019">2019</option>
413: <option value="2020">2020</option>
414: <option value="2021">2021</option>
415: <option value="2022">2022</option>
416: <option value="2023">2023</option>
417: <option value="2024">2024</option>
418: <option value="2025">2025</option>
419: <option value="2026">2026</option>
420: <option value="2027">2027</option>
421: <option value="2028">2028</option>
422: <option value="2029">2029</option>
423: <option value="2030">2030</option>
424: <option value="2031">2031</option>
425: <option value="2032">2032</option>
426: <option value="2033">2033</option>
427: <option value="2034">2034</option>
428: <option value="2035">2035</option>
429: <option value="2036">2036</option>
430: <option value="2037">2037</option>
431: <option value="2038">2038</option>
432: <option value="2039">2039</option>
433: <option value="2040">2040</option>
434: <option value="2041">2041</option>
435: <option value="2042">2042</option>
436: <option value="2043">2043</option>
437: <option value="2044">2044</option>
438: <option value="2045">2045</option>
439: <option value="2046">2046</option>
440: <option value="2047">2047</option>
441: <option value="2048">2048</option>
442: <option value="2049">2049</option>
443: <option value="2050">2050</option>
444: <option value="2051">2051</option>
445: </select>
446: END
447: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
448: return "$month$day$year";
449: }
450:
451: sub selectbox {
452: my ($title,$name,$value,%options)=@_;
453: my $uctitle=uc($title);
454: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
455: "</b></font><br>".'<select name="'.$name.'">';
456: map {
457: $selout.='<option value="'.$_.'"';
458: if ($_ eq $value) { $selout.=' selected'; }
459: $selout.='>'.$options{$_}.'</option>';
460: } sort keys %options;
461: return $selout.'</select>';
462: }
463:
464: # ----------------------------------------------- Performing an advanced search
465: sub advancedsearch {
466: my ($r,$envhash)=@_;
467: my %ENV=%{$envhash};
468:
469: my $fillflag=0;
470: for my $field ('title','author','subject','keywords','url','version',
471: 'notes','abstract','mime','language','owner',
472: 'custommetadata') {
473: if (&filled($ENV{"form.$field"})) {
474: $fillflag++;
475: }
476: }
477:
478: unless ($fillflag) {
479: &output_blank_field_error($r);
480: return OK;
481: }
482:
483: my $query='';
484:
485: my @queries;
486: # Go through logical expression AND/OR/NOT phrase fields.
487: foreach my $field ('title','author','subject','notes','abstract') {
488: if ($ENV{'form.'.$field}) {
489: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
490: }
491: }
492: if (@queries) {
493: $query="(" . join(") and (",@queries) . ")";
494: $query="select * from metadata where $query";
495: my $reply=&Apache::lonnet::metadata_query($query);
496: &output_results('Advanced',$r,$envhash,$query,$reply);
497: }
498: else {
499: &output_results('Advanced',$r,$envhash,$query);
500: }
501: return OK;
502: }
503:
504: # ---------------------------------------------------- see if a field is filled
505: sub filled {
506: my ($field)=@_;
507: if ($field=~/\S/) {
508: return 1;
509: }
510: else {
511: return 0;
512: }
513: }
514:
515: # --------------------------------------------------- Performing a basic search
516: sub basicsearch {
517: my ($r,$envhash)=@_;
518: my %ENV=%{$envhash};
519:
520: unless (&filled($ENV{'form.basicexp'})) {
521: &output_blank_field_error($r);
522: return OK;
523: }
524:
525: my $query='';
526: my $concatarg=join('," ",',
527: ('title', 'author', 'subject', 'notes', 'abstract'));
528:
529: $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";
530: my $reply=&Apache::lonnet::metadata_query($query);
531: &output_results('Basic',$r,$envhash,$query,$reply);
532: return OK;
533: }
534:
535: # ---------------- Message to output when there are not enough fields filled in
536: sub output_blank_field_error {
537: my ($r)=@_;
538: # make query information persistent to allow for subsequent revision
539: my $persistent='';
540: map {
541: if (/^form\./ && !/submit/) {
542: my $name=$_;
543: my $key=$name;
544: $name=~s/^form\.//;
545: $persistent.=<<END;
546: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
547: END
548: }
549: } (keys %ENV);
550:
551: $r->print(<<BEGINNING);
552: <html>
553: <head>
554: <title>The LearningOnline Network with CAPA</title>
555: BEGINNING
556: $r->print(<<RESULTS);
557: </head>
558: <body bgcolor="#ffffff">
559: <img align=right src=/adm/lonIcons/lonlogos.gif>
560: <h1>Search Catalog</h1>
561: <form method="post" action="/adm/searchcat">
562: $persistent
563: <input type='button' value='Revise search request'
564: onClick='this.form.submit();'>
565: $closebutton
566: <hr>
567: <h3>Helpful Message</h3>
568: <p>
569: Incorrect search query due to blank entry fields.
570: You need to fill in the relevant
571: fields on the search page in order for a query to be
572: processed.
573: </p>
574: </body>
575: </html>
576: RESULTS
577: }
578:
579: # ----------------------------- format and output results based on a reply list
580: sub output_results {
581: my ($mode,$r,$envhash,$query,@replylist)=@_;
582: my %ENV=%{$envhash};
583: my $compiledresult='';
584:
585: foreach my $reply (@replylist) {
586:
587: my @results;
588:
589: my $replyfile='';
590: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
591: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
592: $reply=~/(.*?)\_/;
593: my $hostname=$1;
594:
595: {
596: while (1) {
597: last if -e $replyfile;
598: sleep 1;
599: }
600: # QUESTION: how should I handle this error condition..
601: # I'm sure there is syntax elsewhere I can use..
602: my $fh=Apache::File->new($replyfile) or
603: ($r->print('file cannot be opened') and return OK);
604: @results=<$fh>;
605: }
606:
607: foreach my $result (@results) {
608: my ($title,$author,$subject,$url,$keywords,$version,
609: $notes,$abstract,$mime,$lang,
610: $creationdate,$lastrevisiondate,$owner,$copyright
611: )=map {&Apache::lonnet::unescape($_)} (split(/\,/,$result));
612: my $shortabstract=$abstract;
613: $shortabstract=substr($abstract,0,200) if length($abstract)>200;
614: $compiledresult.=<<END;
615: <p>
616: END
617: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
618: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
619: onClick="javascript:select_data('$title','$url')">
620: </font>
621: <br>
622: END
623: $compiledresult.=<<END;
624: <b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
625: <br>
626: <b>Title:</b> $title<br>
627: <b>Author(s):</b> $author<br>
628: <b>Subject:</b> $subject<br>
629: <b>Keyword(s):</b> $keywords<br>
630: <b>Notes:</b> $notes<br>
631: <b>Abstract:</b> $shortabstract<br>
632: <b>MIME Type:</b> $mimetag{$mime}<br>
633: <b>Language:</b> $language{$lang}<br>
634: <b>Creation Date:</b> $creationdate<br>
635: <b>Last Revision Date:</b> $lastrevisiondate<br>
636: <b>Publisher/Owner:</b> $owner<br>
637: <b>Copyright/Distribution:</b> $copyright<br>
638: <b>Repository Location:</b> $hostname
639: </p>
640: END
641: }
642:
643: unless ($compiledresult) {
644: $compiledresult="There were no results that matched your query";
645: }
646:
647: # make query information persistent to allow for subsequent revision
648: my $persistent='';
649: map {
650: if (/^form\./ && !/submit/) {
651: my $name=$_;
652: my $key=$name;
653: $name=~s/^form\.//;
654: $persistent.=<<END;
655: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
656: END
657: }
658: } (keys %ENV);
659:
660: $r->print(<<BEGINNING);
661: <html>
662: <head>
663: <title>The LearningOnline Network with CAPA</title>
664: BEGINNING
665: $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
666: <script>
667: function select_data(title,url) {
668: changeTitle(title);
669: changeURL(url);
670: }
671: function changeTitle(val) {
672: if (opener.inf.document.forms.resinfo.elements.t) {
673: opener.inf.document.forms.resinfo.elements.t.value=val;
674: }
675: }
676: function changeURL(val) {
677: if (opener.inf.document.forms.resinfo.elements.u) {
678: opener.inf.document.forms.resinfo.elements.u.value=val;
679: }
680: }
681: </script>
682: SCRIPT
683: $r->print(<<RESULTS);
684: </head>
685: <body bgcolor="#ffffff">
686: <img align=right src=/adm/lonIcons/lonlogos.gif>
687: <h1>Search Catalog</h1>
688: <form method="post" action="/adm/searchcat">
689: <input type='button' value='Revise search request'
690: onClick='this.form.submit();'>
691: $closebutton
692: $persistent
693: <hr>
694: <h3>Search Query</h3>
695: RESULTS
696: if ($mode eq 'Basic') {
697: $r->print(<<RESULTS);
698: <p>
699: <b>Basic search:</b> $ENV{'form.basicexp'}
700: </p>
701: RESULTS
702: }
703: elsif ($mode eq 'Advanced') {
704: $r->print(<<RESULTS);
705: <p>
706: <b>Advanced search</b>
707: $query
708: </p>
709: RESULTS
710: }
711: $r->print(<<RESULTS);
712: <h3>Search Results</h3>
713: $compiledresult
714: </body>
715: </html>
716: RESULTS
717: }
718: }
719:
720: # ------------------------------------------------------------- build_SQL_query
721: sub build_SQL_query {
722: my ($field_name,$logic_statement)=@_;
723: my $q=new Text::Query('abc',
724: -parse => 'Text::Query::ParseAdvanced',
725: -build => 'Text::Query::Build');
726: $q->prepare($logic_statement);
727: my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
728: my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
729: return $sql_query;
730: }
731:
732: # - Recursively parse a reverse notation expression into a SQL query expression
733: sub recursive_SQL_query_build {
734: my ($dkey,$pattern)=@_;
735: my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
736: return $pattern unless @matches;
737: foreach my $match (@matches) {
738: $match=~/\[ (\w+)\s(.*) \]/;
739: my ($key,$value)=($1,$2);
740: my $replacement='';
741: if ($key eq 'literal') {
742: $replacement="($dkey like \"\%$value\%\")";
743: }
744: elsif ($key eq 'and') {
745: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
746: $replacement="($1 AND $2)";
747: }
748: elsif ($key eq 'or') {
749: $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
750: $replacement="($1 OR $2)";
751: }
752: substr($pattern,
753: index($pattern,$match),
754: length($match),
755: $replacement
756: );
757: }
758: &recursive_SQL_query_build($dkey,$pattern);
759: }
760:
761: 1;
762: __END__
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