/[webpac]/trunk/WebPac.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/WebPac.pm

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Revision 190 - (show annotations)
Sat Nov 29 19:11:23 2003 UTC (15 years, 11 months ago) by dpavlin
File size: 8040 byte(s)
exact matches can now specify to include (or not) wildcard at end. Added
also documentation about exact matching using swish-e

1 package WebPac;
2
3 use base 'CGI::Application';
4 use strict;
5
6 use HTML::Pager;
7 use HTML::FillInForm;
8 use SWISH;
9 use Text::Iconv;
10 use DBI;
11 use Config::IniFiles;
12 use Text::Unaccent;
13
14 use lib '..';
15 use index_DBI_cache;
16 use back2html;
17
18
19 # read global.conf configuration
20 my $cfg_global = new Config::IniFiles( -file => '../global.conf' ) || die "can't open 'global.conf'";
21
22 # configuration options from global.conf
23 my $TEMPLATE_PATH = $cfg_global->val('webpac', 'template_html') || die "need template_html in global.conf, section webpac";
24 my $CHARSET = $cfg_global->val('webpac', 'charset') || 'ISO-8859-1';
25 my $SWISH = $cfg_global->val('webpac', 'swish') || '/usr/bin/swish-e';
26 my $INDEX = $cfg_global->val('webpac', 'index') || die "need index in global.conf, section webpac";
27 my $MAX_HITS = $cfg_global->val('webpac', 'max_hits') || 0;
28 my $ON_PAGE =$cfg_global->val('webpac', 'on_page') || 10;
29 my $MIN_WILDCARD =$cfg_global->val('webpac', 'min_wildcard') || 1;
30 my $TEMPLATE =$cfg_global->val('webpac', 'template');
31 my $UNAC_FILTER =$cfg_global->val('global', 'unac_filter');
32
33 if ($UNAC_FILTER) {
34 require $UNAC_FILTER;
35 }
36
37 Text::Iconv->raise_error(0); # Conversion errors raise exceptions
38
39 my $from_utf8 = Text::Iconv->new('UTF8', $CHARSET);
40
41
42 sub setup {
43 my $self = shift;
44 $self->tmpl_path($TEMPLATE_PATH);
45 $self->run_modes(
46 'search' => 'show_search_form',
47 'results' => 'show_results_list',
48 # 'user' => 'show_user_detail',
49 'index' => 'show_index',
50 );
51 $self->start_mode('search');
52 $self->mode_param('rm');
53
54 $self->header_props(-charset=>$CHARSET);
55 }
56
57 sub in_template {
58 my $html = shift || "This page is left unintentionally blank";
59 return $html if (! defined($TEMPLATE));
60 if (open(T, $TEMPLATE)) {
61 my $template_html = join("\n",<T>);
62 close(T);
63 $template_html =~ s/##webpac##/$html/gsi;
64 return $template_html;
65 } else {
66 return "Can't read template '$TEMPLATE'";
67 }
68 }
69
70 sub show_search_form {
71 my $self = shift;
72
73 # Get the CGI.pm query object
74 my $q = $self->query();
75
76 my $tmpl = $self->load_tmpl('search.html');
77 my $html = $tmpl->output;
78
79 my $fif = new HTML::FillInForm;
80
81 return in_template($fif->fill(scalarref => \$html, fobject => $q,
82 target => 'search'));
83 }
84
85 sub show_results_list {
86 my $self = shift;
87
88 my $q = $self->query();
89
90 my @swish_results; # results from swish
91
92 # load template for this page
93
94 my @s_arr; # all queries are located here
95
96 my @path_arr = $q->param('path');
97 my $full = $q->param('full');
98
99 my @persist_vars = ( 'rm' );
100 my @url_params = ( 'rm=results', 'show_full=1', 'last_PAGER_offset='.$q->param('PAGER_offset') || 0 );
101
102 # support parametars "f" and "v" for start
103 for(my $i = ""; $i <=30; $i++) {
104
105 return show_index($self, $i) if ($q->param("f".$i."_index"));
106
107 next if (! $q->param("v$i"));
108 next if (! $q->param("f$i"));
109
110 push @persist_vars, "f$i";
111 push @persist_vars, "v$i";
112 push @persist_vars, "e$i" if ($q->param("e$i"));
113
114 push @url_params,"f$i=".$q->url_param("f$i");
115 foreach my $v ($q->url_param("v$i")) {
116 push @url_params,"v$i=$v";
117 }
118 push @url_params,"e$i=".$q->url_param("e$i");
119
120 my $wc="*"; # swish wildcard
121 $wc="" if ($i eq ""); # don't apply wildcard on field 0
122
123 # re-write query from +/- to and/and not
124 my @param_vals = $q->param("v$i");
125 my @swish_q;
126 my ($pre,$post,$exact) = ('','','');
127 while (my $search = shift @param_vals) {
128 my $s;
129 # remove accents
130 $search = unac_string($CHARSET,$search);
131 while ($search =~ s/\s*("[^"]+")\s*/ /) {
132 $s .= "$1 ";
133 }
134 $search =~ s/^\s+//;
135 $search =~ s/\s+$//;
136
137 # filed e[nr] is exact match bitmask
138 # 1 = beginning, 2=end, 3=both
139 $pre = '"xxbxx ' if ($q->param("e$i") & 1);
140 $post = ' xxexx"' if ($q->param("e$i") & 2);
141 # add qotes on other side
142 if ($q->param("e$i")) {
143 $pre = '"' if (! $pre);
144 $post = '"' if (! $post);
145 # what about wildcards?
146 $wc = '';
147 $wc = '*' if ($q->param("e$i") & 4);
148 $exact = '_exact';
149 }
150
151 foreach (split(/\s+/,$search)) {
152 if (m/^([+-])(\S+)/) {
153 $s.= ($s) ? "and " : "";
154 $s.="not " if ($1 eq "-");
155 $s.=$2.$wc." ";
156 } elsif (m/^\s*(and|or|not)\s*$/i) {
157 $s.=$_." ";
158 # don't add * to words with less than x chars
159 } elsif (length($_) <= $MIN_WILDCARD) {
160 $s.=$_." ";
161 } else {
162 $s.=$_.$wc." ";
163 }
164 }
165 $s =~ s/\*+/*/g;
166 $s = $pre.$s.$post if ($q->param("e$i"));
167 push @swish_q,$s;
168 }
169 # FIXME default operator for multi-value fields is or. There is
170 # no way to change it, except here for now. Is there need?
171 push @s_arr, $q->param("f$i")."_swish".$exact."=(".join(" or ",@swish_q).")";
172 }
173
174 my $tmpl = $self->load_tmpl('results.html', global_vars => 1);
175
176 sub esc_html {
177 my $html = shift;
178 $html =~ s/</&lt;/g;
179 $html =~ s/>/&gt;/g;
180 return $html;
181 }
182
183 # call swish
184 my $sh = SWISH->connect('Fork',
185 prog => $SWISH,
186 indexes => $INDEX,
187 properties => [qw/swishdocpath swishrank swishtitle headline html/],
188 results => sub {
189 my ($sh,$hit) = @_;
190
191 push @swish_results, {
192 nr => ($#swish_results + 2),
193 path => $hit->swishdocpath,
194 headline => esc_html($from_utf8->convert($hit->headline)),
195 html => back2html($from_utf8->convert($hit->html)),
196 rank => $hit->swishrank };
197
198 },
199 #startnum => 0,
200 maxhits => $MAX_HITS
201 );
202
203 die $SWISH::errstr unless $sh;
204 # construct swish query
205 my $sw_q = join(" and ",@s_arr);
206 if (@path_arr && $q->param('show_full')) {
207 $sw_q .= "and (swishdocpath=\"";
208 $sw_q .= join("\" or swishdocpath=\"",@path_arr);
209 $sw_q .= "\")";
210 $tmpl->param('full',1); # show full records
211 } elsif ($q->param('show_full')) {
212 # just show full path, no path defined
213 $tmpl->param('full',1);
214 } else {
215 $tmpl->param('full',0);
216 }
217
218 my $hits = $sh->query($sw_q);
219
220 $tmpl->param('hits',$hits);
221 $tmpl->param('search',$sw_q);
222
223 $tmpl->param('PAGER_offset',$q->param("PAGER_offset") || 0);
224 $tmpl->param('last_PAGER_offset',$q->param("last_PAGER_offset") || 0);
225
226 $tmpl->param('url_params',"?".join("&",@url_params));
227
228 # create a Pager object
229 my $pager = HTML::Pager->new(
230 # required parameters
231 query => $q,
232 get_data_callback => sub {
233 my ($offset, $rows) = @_;
234
235 my @result;
236 for (my $i=0; $i<$rows; $i++) {
237 my $r = $swish_results[$offset+$i];
238 if ($r && $tmpl->param('full')) {
239 push @result, $r;
240 } elsif ($r) {
241 # if not full output, skip html
242 delete $r->{html};
243 push @result, $r;
244 }
245 }
246 return \@result;
247 },
248 rows => $hits,
249 page_size => $ON_PAGE,
250 # some optional parameters
251 persist_vars => [ @persist_vars ],
252 #cell_space_color => '#000000',
253 #cell_background_color => '#ffffff',
254 #nav_background_color => '#dddddd',
255 #javascript_presubmit => 'last_minute_javascript()',
256 debug => 1,
257 template => $tmpl,
258 );
259
260 my $html = $pager->output;
261
262 return in_template($html);
263 }
264
265 sub show_index {
266 my $self = shift;
267 my $i = shift; # field number
268
269 my $q = $self->query();
270
271 my $field = $q->param("f$i");
272 my $limit = $q->param("v$i");
273
274 my $html;
275
276 my $index = new index_DBI(
277 $cfg_global->val('global', 'dbi_dbd'),
278 $cfg_global->val('global', 'dbi_dsn'),
279 $cfg_global->val('global', 'dbi_user'),
280 $cfg_global->val('global', 'dbi_passwd') || ''
281 );
282
283 my $total = $index->count($field,$limit);
284 if (! $total) {
285 my $tmpl = $self->load_tmpl('no_index.html');
286 $tmpl->param('field',$field);
287 $html = $tmpl->output;
288 return $html;
289 }
290
291 my $tmpl = $self->load_tmpl('index_res.html', global_vars => 1);
292 $tmpl->param('field',$field);
293 $tmpl->param('limit',$limit);
294 $tmpl->param('total',$total);
295
296 # FIXME I should set offset and leave out limit from fetch!!
297 # if (! $q->param("PAGER_offset") {
298 # $q->param("Pager_offet)
299 # }
300
301 my $pager = HTML::Pager->new(
302 query => $q,
303 get_data_callback => sub {
304 my ($offset, $rows) = @_;
305
306 my @result = $index->fetch($field,$limit, $offset, $rows);
307 return \@result;
308 },
309 rows => $total,
310 page_size => $ON_PAGE,
311 persist_vars => [
312 'rm',
313 "f$i", "v$i", "f".$i."_index",
314 'offset',
315 ],
316 debug => 1,
317 template => $tmpl,
318 );
319
320 return in_template($pager->output);
321 }
322
323 1;

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