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 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:
64: sub handler {
65: my $r = shift;
66:
67: # -------------------------------------- see if called from an interactive mode
68: map {
69: my ($name, $value) = split(/=/,$_);
70: $value =~ tr/+/ /;
71: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
72: if ($name eq 'catalogmode') {
73: $ENV{'form.'.$name}=$value;
74: }
75: } (split(/&/,$ENV{'QUERY_STRING'}));
76:
77: $r->content_type('text/html');
78: $r->send_http_header;
79: return OK if $r->header_only;
80:
81: %metadatafields=();
82:
83: my $hidden='';
84: $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';
85: <input type='hidden' name='catalogmode' value='interactive'>
86: END
87:
88: $closebutton=<<END if $ENV{'form.catalogmode'} eq 'interactive';
89: <input type="button" name="close" value="CLOSE" onClick="self.close()">
90: END
91:
92: # ------------------------------------------------ First, check out environment
93: $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
94:
95: # --------------------------------- Compute various listings of metadata values
96:
97: %language=();
98: $language{'any'}='Any language';
99: {
100: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');
101: map {
102: $_=~/(\w+)\s+([\w\s\-]+)/;
103: $language{$1}=$2;
104: } <$fh>;
105: }
106:
107: %cprtag=();
108: $cprtag{'any'}='Any copyright/distribution';
109: {
110: my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
111: map {
112: $_=~/(\w+)\s+([\w\s\-]+)/;
113: $cprtag{$1}=$2;
114: } <$fh>;
115: }
116:
117: %mimetag=();
118: $mimetag{'any'}='Any type';
119: {
120: my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');
121: map {
122: $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;
123: $mimetag{$1}=".$1 $3";
124: } <$fh>;
125: }
126:
127: if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
128: return &basicsearch($r,\%ENV);
129: }
130: elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
131: return &advancedsearch($r,\%ENV);
132: }
133:
134: $scrout=''; # building a part of screen output
135: $scrout.=&searchphrasefield('Limit by title','title',
136: $ENV{'form.title'});
137:
138: $scrout.=&searchphrasefield('Limit by author','author',
139: $ENV{'form.author'});
140:
141: $scrout.=&searchphrasefield('Limit by subject','subject',
142: $ENV{'form.subject'});
143:
144: $scrout.=&searchphrasefield('Limit by keywords','keywords',
145: $ENV{'form.keywords'});
146:
147: $scrout.=&searchphrasefield('Limit by URL','url',
148: $ENV{'form.url'});
149:
150: $scrout.=&searchphrasefield('Limit by version','version',
151: $ENV{'form.version'});
152:
153: $scrout.=&searchphrasefield('Limit by notes','notes',
154: $ENV{'form.notes'});
155:
156: $scrout.=&searchphrasefield('Limit by abstract','abstract',
157: $ENV{'form.abstract'});
158:
159: $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
160: $scrout.=&selectbox('Limit by MIME type','mime',
161: $ENV{'form.mime'},%mimetag);
162:
163: $ENV{'form.language'}='any' unless length($ENV{'form.language'});
164:
165: $scrout.=&selectbox('Limit by language','language',
166: $ENV{'form.language'},%language);
167:
168:
169: # ------------------------------------------------ Compute date selection boxes
170: $scrout.=<<CREATIONDATESTART;
171: <p>
172: <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
173: </font>
174: <br>
175: between:
176: CREATIONDATESTART
177: $scrout.=&dateboxes('creationdatestart',1,1,1976,
178: $ENV{'form.creationdatestart_month'},
179: $ENV{'form.creationdatestart_day'},
180: $ENV{'form.creationdatestart_year'},
181: );
182: $scrout.=<<CREATIONDATEEND;
183: and:
184: CREATIONDATEEND
185: $scrout.=&dateboxes('creationdateend',12,31,2051,
186: $ENV{'form.creationdateend_month'},
187: $ENV{'form.creationdateend_day'},
188: $ENV{'form.creationdateend_year'},
189: );
190: $scrout.="</p>";
191:
192: $scrout.=<<LASTREVISIONDATESTART;
193: <p>
194: <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
195: </b></font>
196: <br>between:
197: LASTREVISIONDATESTART
198: $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
199: $ENV{'form.lastrevisiondatestart_month'},
200: $ENV{'form.lastrevisiondatestart_day'},
201: $ENV{'form.lastrevisiondatestart_year'},
202: );
203: $scrout.=<<LASTREVISIONDATEEND;
204: and:
205: LASTREVISIONDATEEND
206: $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
207: $ENV{'form.lastrevisiondateend_month'},
208: $ENV{'form.lastrevisiondateend_day'},
209: $ENV{'form.lastrevisiondateend_year'},
210: );
211: $scrout.='</p>';
212:
213: $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
214: $ENV{'form.owner'});
215: # $metadatafields{'owner'});
216:
217: $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
218: $scrout.=&selectbox('Limit by copyright/distribution','copyright',
219: $ENV{'form.copyright'},%cprtag);
220:
221: # ------------------------------------------- Compute customized metadata field
222: $scrout.=<<CUSTOMMETADATA;
223: <p>
224: <font color="#800000" face="helvetica"><b>LIMIT BY OTHER METADATA FIELDS:</b>
225: </font>
226: For author-specific metadata, enter in an expression in the form of
227: <i>key</i>=<i>value</i> separated by operators such as AND or OR.<br>
228: <b>Example:</b> grandmother=75 OR grandfather=85
229: <br>
230: CUSTOMMETADATA
231: $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
232: $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
233:
234: # ---------------------------------------------------------------- Print screen
235: $r->print(<<ENDDOCUMENT);
236: <html>
237: <head>
238: <title>The LearningOnline Network with CAPA</title>
239: </head>
240: <body bgcolor="#FFFFFF">
241: <img align=right src=/adm/lonIcons/lonlogos.gif>
242: <h1>Search Catalog</h1>
243: <form method="post" action="/adm/searchcat">
244: $hidden
245: <hr>
246: <h3>Basic Search</h3>
247: <p>
248: Enter terms or phrases separated by search operators
249: such as AND or OR then press SEARCH below. Terms should be specific
250: to the title, author, subject, notes, or abstract information associated
251: with a resource.
252: <br>
253: ENDDOCUMENT
254: $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
255: $r->print(' ');
256: $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
257: $r->print('<font color="#800000">Title only</font> ');
258: $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
259: $r->print(<<ENDDOCUMENT);
260: <font color="#800000">Search historic archives</font>
261: <br>
262: <input type="submit" name="basicsubmit" value="SEARCH">
263: <input type="reset" name="reset" value="RESET">
264: $closebutton
265: $viewselect
266: </p>
267: <hr>
268: <h3>Advanced Search</h3>
269: $scrout
270: <p>
271: <input type="submit" name="advancedsubmit" value="SEARCH">
272: <input type="reset" name="reset" value="RESET">
273: $closebutton
274: $viewselect
275: </p>
276: </form>
277: </body>
278: </html>
279: ENDDOCUMENT
280: return OK;
281: }
282:
283: # --------------------------------------------------------- Various form fields
284:
285: sub simpletextfield {
286: my ($name,$value)=@_;
287: return '<input type=text name="'.$name.'" size=20 value="'.$value.'">';
288: }
289:
290: sub simplecheckbox {
291: my ($name,$value)=@_;
292: my $checked='';
293: $checked="CHECKED" if $value eq 'on';
294: return '<input type=checkbox name="'.$name.'" '. $checked . '>';
295: }
296:
297: sub searchphrasefield {
298: my ($title,$name,$value)=@_;
299: my $instruction=<<END;
300: Enter terms or phrases separated by search operators such
301: as AND or OR.
302: END
303: my $uctitle=uc($title);
304: return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
305: "</FONT> $instruction<br>".
306: '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
307: }
308:
309: sub dateboxes {
310: my ($name,$defaultmonth,$defaultday,$defaultyear,
311: $currentmonth,$currentday,$currentyear)=@_;
312: ($defaultmonth,$defaultday,$defaultyear)=('','','');
313: my $month=<<END;
314: <select name="${name}_month">
315: <option value='$defaultmonth'> </option>
316: <option value="1">January</option>
317: <option value="2">February</option>
318: <option value="3">March</option>
319: <option value="4">April</option>
320: <option value="5">May</option>
321: <option value="6">June</option>
322: <option value="7">July</option>
323: <option value="8">August</option>
324: <option value="9">September</option>
325: <option value="10">October</option>
326: <option value="11">November</option>
327: <option value="12">December</option>
328: </select>
329: END
330: $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
331: my $day=<<END;
332: <select name="${name}_day">
333: <option value='$defaultday'> </option>
334: <option value="1">1</option>
335: <option value="2">2</option>
336: <option value="3">3</option>
337: <option value="4">4</option>
338: <option value="5">5</option>
339: <option value="6">6</option>
340: <option value="7">7</option>
341: <option value="8">8</option>
342: <option value="9">9</option>
343: <option value="10">10</option>
344: <option value="11">11</option>
345: <option value="12">12</option>
346: <option value="13">13</option>
347: <option value="14">14</option>
348: <option value="15">15</option>
349: <option value="16">16</option>
350: <option value="17">17</option>
351: <option value="18">18</option>
352: <option value="19">19</option>
353: <option value="20">20</option>
354: <option value="21">21</option>
355: <option value="22">22</option>
356: <option value="23">23</option>
357: <option value="24">24</option>
358: <option value="25">25</option>
359: <option value="26">26</option>
360: <option value="27">27</option>
361: <option value="28">28</option>
362: <option value="29">29</option>
363: <option value="30">30</option>
364: <option value="31">31</option>
365: </select>
366: END
367: $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
368: my $year=<<END;
369: <select name="${name}_year">
370: <option value='$defaultyear'> </option>
371: <option value="1976">1976</option>
372: <option value="1977">1977</option>
373: <option value="1978">1978</option>
374: <option value="1979">1979</option>
375: <option value="1980">1980</option>
376: <option value="1981">1981</option>
377: <option value="1982">1982</option>
378: <option value="1983">1983</option>
379: <option value="1984">1984</option>
380: <option value="1985">1985</option>
381: <option value="1986">1986</option>
382: <option value="1987">1987</option>
383: <option value="1988">1988</option>
384: <option value="1989">1989</option>
385: <option value="1990">1990</option>
386: <option value="1991">1991</option>
387: <option value="1992">1992</option>
388: <option value="1993">1993</option>
389: <option value="1994">1994</option>
390: <option value="1995">1995</option>
391: <option value="1996">1996</option>
392: <option value="1997">1997</option>
393: <option value="1998">1998</option>
394: <option value="1999">1999</option>
395: <option value="2000">2000</option>
396: <option value="2001">2001</option>
397: <option value="2002">2002</option>
398: <option value="2003">2003</option>
399: <option value="2004">2004</option>
400: <option value="2005">2005</option>
401: <option value="2006">2006</option>
402: <option value="2007">2007</option>
403: <option value="2008">2008</option>
404: <option value="2009">2009</option>
405: <option value="2010">2010</option>
406: <option value="2011">2011</option>
407: <option value="2012">2012</option>
408: <option value="2013">2013</option>
409: <option value="2014">2014</option>
410: <option value="2015">2015</option>
411: <option value="2016">2016</option>
412: <option value="2017">2017</option>
413: <option value="2018">2018</option>
414: <option value="2019">2019</option>
415: <option value="2020">2020</option>
416: <option value="2021">2021</option>
417: <option value="2022">2022</option>
418: <option value="2023">2023</option>
419: <option value="2024">2024</option>
420: <option value="2025">2025</option>
421: <option value="2026">2026</option>
422: <option value="2027">2027</option>
423: <option value="2028">2028</option>
424: <option value="2029">2029</option>
425: <option value="2030">2030</option>
426: <option value="2031">2031</option>
427: <option value="2032">2032</option>
428: <option value="2033">2033</option>
429: <option value="2034">2034</option>
430: <option value="2035">2035</option>
431: <option value="2036">2036</option>
432: <option value="2037">2037</option>
433: <option value="2038">2038</option>
434: <option value="2039">2039</option>
435: <option value="2040">2040</option>
436: <option value="2041">2041</option>
437: <option value="2042">2042</option>
438: <option value="2043">2043</option>
439: <option value="2044">2044</option>
440: <option value="2045">2045</option>
441: <option value="2046">2046</option>
442: <option value="2047">2047</option>
443: <option value="2048">2048</option>
444: <option value="2049">2049</option>
445: <option value="2050">2050</option>
446: <option value="2051">2051</option>
447: </select>
448: END
449: $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
450: return "$month$day$year";
451: }
452:
453: sub selectbox {
454: my ($title,$name,$value,%options)=@_;
455: my $uctitle=uc($title);
456: my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
457: "</b></font><br>".'<select name="'.$name.'">';
458: map {
459: $selout.='<option value="'.$_.'"';
460: if ($_ eq $value) { $selout.=' selected'; }
461: $selout.='>'.$options{$_}.'</option>';
462: } sort keys %options;
463: return $selout.'</select>';
464: }
465:
466: # ----------------------------------------------- Performing an advanced search
467: sub advancedsearch {
468: my ($r,$envhash)=@_;
469: my %ENV=%{$envhash};
470:
471: my $fillflag=0;
472: for my $field ('title','author','subject','keywords','url','version',
473: 'notes','abstract','mime','language','owner',
474: 'custommetadata') {
475: if (&filled($ENV{"form.$field"})) {
476: $fillflag++;
477: }
478: }
479:
480: unless ($fillflag) {
481: &output_blank_field_error($r);
482: return OK;
483: }
484:
485: my $query='';
486:
487: my @queries;
488: # Go through logical expression AND/OR/NOT phrase fields.
489: foreach my $field ('title','author','subject','notes','abstract') {
490: if ($ENV{'form.'.$field}) {
491: push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
492: }
493: }
494: if (@queries) {
495: $query=join(" and ",@queries);
496: $query="select * from metadata where $query";
497: my $reply=&Apache::lonnet::metadata_query($query);
498: &output_results('Advanced',$r,$envhash,$query,$reply);
499: }
500: else {
501: &output_results('Advanced',$r,$envhash,$query);
502: }
503: return OK;
504: }
505:
506: # ---------------------------------------------------- see if a field is filled
507: sub filled {
508: my ($field)=@_;
509: if ($field=~/\S/) {
510: return 1;
511: }
512: else {
513: return 0;
514: }
515: }
516:
517: # --------------------------------------------------- Performing a basic search
518: sub basicsearch {
519: my ($r,$envhash)=@_;
520: my %ENV=%{$envhash};
521:
522: unless (&filled($ENV{'form.basicexp'})) {
523: &output_blank_field_error($r);
524: return OK;
525: }
526:
527: my $query='';
528: my $concatarg=join('," ",',
529: ('title', 'author', 'subject', 'notes', 'abstract'));
530:
531: $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";
532: my $reply=&Apache::lonnet::metadata_query($query);
533: &output_results('Basic',$r,$envhash,$query,$reply);
534: return OK;
535: }
536:
537: # ---------------- Message to output when there are not enough fields filled in
538: sub output_blank_field_error {
539: my ($r)=@_;
540: # make query information persistent to allow for subsequent revision
541: my $persistent='';
542: map {
543: if (/^form\./ && !/submit/) {
544: my $name=$_;
545: my $key=$name;
546: $name=~s/^form\.//;
547: $persistent.=<<END;
548: <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
549: END
550: }
551: } (keys %ENV);
552:
553: $r->print(<<BEGINNING);
554: <html>
555: <head>
556: <title>The LearningOnline Network with CAPA</title>
557: BEGINNING
558: $r->print(<<RESULTS);
559: </head>
560: <body bgcolor="#ffffff">
561: <img align=right src=/adm/lonIcons/lonlogos.gif>
562: <h1>Search Catalog</h1>
563: <form method="post" action="/adm/searchcat">
564: $persistent
565: <input type='button' value='Revise search request'
566: onClick='this.form.submit();'>
567: $closebutton
568: <hr>
569: <h3>Helpful Message</h3>
570: <p>
571: Incorrect search query due to blank entry fields.
572: You need to fill in the relevant
573: fields on the search page in order for a query to be
574: processed.
575: </p>
576: </body>
577: </html>
578: RESULTS
579: }
580:
581: # ----------------------------- format and output results based on a reply list
582: sub output_results {
583: my ($mode,$r,$envhash,$query,@replylist)=@_;
584: my %ENV=%{$envhash};
585: my $compiledresult='';
586:
587: foreach my $reply (@replylist) {
588:
589: my @results;
590:
591: my $replyfile='';
592: $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
593: $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
594: $reply=~/(.*?)\_/;
595: my $hostname=$1;
596:
597: {
598: while (1) {
599: last if -e $replyfile;
600: sleep 1;
601: }
602: # QUESTION: how should I handle this error condition..
603: # I'm sure there is syntax elsewhere I can use..
604: my $fh=Apache::File->new($replyfile) or
605: ($r->print('file cannot be opened') and return OK);
606: @results=<$fh>;
607: }
608:
609: foreach my $result (@results) {
610: my @fields=map
611: {&Apache::lonnet::unescape($_)}
612: (split(/\,/,$result));
613: my ($title,$author,$subject,$url,$keywords,$version,
614: $notes,$abstract,$mime,$lang,
615: $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
616: my $shortabstract=$abstract;
617: $shortabstract=substr($abstract,0,200) if length($abstract)>200;
618: $compiledresult.=<<END;
619: <p>
620: END
621: $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
622: <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
623: onClick="javascript:select_data('$title','$url')">
624: </font>
625: <br>
626: END
627:
628: if ($ENV{'form.viewselect'} eq 'Detailed Citation View') {
629: $compiledresult.=&detailed_citation_view(@fields);
630: }
631: elsif ($ENV{'form.viewselect'} eq 'Summary View') {
632: $compiledresult.=&summary_view(@fields);
633: }
634: elsif ($ENV{'form.viewselect'} eq 'Fielded Format') {
635: $compiledresult.=&fielded_format_view(@fields);
636: }
637: elsif ($ENV{'form.viewselect'} eq 'XML/SGML') {
638: $compiledresult.=&xml_sgml_view(@fields);
639: }
640:
641: }
642:
643: unless ($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,$pattern);
759: }
760:
761: # ------------------------------------------------------ Detailed Citation View
762: sub detailed_citation_view {
763: my ($title,$author,$subject,$url,$keywords,$version,
764: $notes,$abstract,$mime,$lang,
765: $creationdate,$lastrevisiondate,$owner,$copyright)=@_;
766: my $result=<<END;
767: <b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
768: <br>
769: <b>Title:</b> $title<br>
770: <b>Author(s):</b> $author<br>
771: <b>Subject:</b> $subject<br>
772: <b>Keyword(s):</b> $keywords<br>
773: <b>Notes:</b> $notes<br>
774: <b>Abstract:</b> $shortabstract<br>
775: <b>MIME Type:</b> $mimetag{$mime}<br>
776: <b>Language:</b> $language{$lang}<br>
777: <b>Creation Date:</b> $creationdate<br>
778: <b>Last Revision Date:</b> $lastrevisiondate<br>
779: <b>Publisher/Owner:</b> $owner<br>
780: <b>Copyright/Distribution:</b> $copyright<br>
781: <b>Repository Location:</b> $hostname
782: </p>
783: END
784: return $result;
785: }
786:
787: # ---------------------------------------------------------------- Summary View
788: sub summary_view {
789: my ($title,$author,$subject,$url,$keywords,$version,
790: $notes,$abstract,$mime,$lang,
791: $creationdate,$lastrevisiondate,$owner,$copyright)=@_;
792: my $result=<<END;
793: <b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
794: <br>
795: <b>Title:</b> $title<br>
796: <b>Author(s):</b> $author<br>
797: <b>Subject:</b> $subject<br>
798: <b>Keyword(s):</b> $keywords<br>
799: <b>Notes:</b> $notes<br>
800: <b>Abstract:</b> $shortabstract<br>
801: <b>MIME Type:</b> $mimetag{$mime}<br>
802: <b>Language:</b> $language{$lang}<br>
803: <b>Creation Date:</b> $creationdate<br>
804: <b>Last Revision Date:</b> $lastrevisiondate<br>
805: <b>Publisher/Owner:</b> $owner<br>
806: <b>Copyright/Distribution:</b> $copyright<br>
807: <b>Repository Location:</b> $hostname
808: </p>
809: END
810: return $result;
811: }
812:
813: # -------------------------------------------------------------- Fielded Format
814: sub fielded_format_view {
815: my ($title,$author,$subject,$url,$keywords,$version,
816: $notes,$abstract,$mime,$lang,
817: $creationdate,$lastrevisiondate,$owner,$copyright)=@_;
818: my $result=<<END;
819: <b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
820: <br>
821: <b>Title:</b> $title<br>
822: <b>Author(s):</b> $author<br>
823: <b>Subject:</b> $subject<br>
824: <b>Keyword(s):</b> $keywords<br>
825: <b>Notes:</b> $notes<br>
826: <b>Abstract:</b> $shortabstract<br>
827: <b>MIME Type:</b> $mimetag{$mime}<br>
828: <b>Language:</b> $language{$lang}<br>
829: <b>Creation Date:</b> $creationdate<br>
830: <b>Last Revision Date:</b> $lastrevisiondate<br>
831: <b>Publisher/Owner:</b> $owner<br>
832: <b>Copyright/Distribution:</b> $copyright<br>
833: <b>Repository Location:</b> $hostname
834: </p>
835: END
836: return $result;
837: }
838:
839: # -------------------------------------------------------------------- XML/SGML
840: sub xml_sgml_view {
841: my ($title,$author,$subject,$url,$keywords,$version,
842: $notes,$abstract,$mime,$lang,
843: $creationdate,$lastrevisiondate,$owner,$copyright)=@_;
844: my $result=<<END;
845: <b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
846: <br>
847: <b>Title:</b> $title<br>
848: <b>Author(s):</b> $author<br>
849: <b>Subject:</b> $subject<br>
850: <b>Keyword(s):</b> $keywords<br>
851: <b>Notes:</b> $notes<br>
852: <b>Abstract:</b> $shortabstract<br>
853: <b>MIME Type:</b> $mimetag{$mime}<br>
854: <b>Language:</b> $language{$lang}<br>
855: <b>Creation Date:</b> $creationdate<br>
856: <b>Last Revision Date:</b> $lastrevisiondate<br>
857: <b>Publisher/Owner:</b> $owner<br>
858: <b>Copyright/Distribution:</b> $copyright<br>
859: <b>Repository Location:</b> $hostname
860: </p>
861: END
862: return $result;
863: }
864:
865: 1;
866: __END__
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