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1 | package Catalyst::Dispatcher; |
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2 | |
3 | use strict; |
4 | use base 'Class::Data::Inheritable'; |
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5 | use Catalyst::Utils; |
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6 | use Text::ASCIITable; |
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7 | use Tree::Simple; |
8 | use Tree::Simple::Visitor::FindByPath; |
9 | |
10 | __PACKAGE__->mk_classdata($_) for qw/actions tree/; |
11 | |
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12 | # These are the core structures |
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13 | __PACKAGE__->actions( |
14 | { plain => {}, private => {}, regex => {}, compiled => [], reverse => {} } |
15 | ); |
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16 | |
17 | # We use a tree |
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18 | __PACKAGE__->tree( Tree::Simple->new( 0, Tree::Simple->ROOT ) ); |
19 | |
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20 | =head1 NAME |
21 | |
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22 | Catalyst::Dispatcher - The Catalyst Dispatcher |
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23 | |
24 | =head1 SYNOPSIS |
25 | |
26 | See L<Catalyst>. |
27 | |
28 | =head1 DESCRIPTION |
29 | |
30 | =head1 METHODS |
31 | |
32 | =over 4 |
33 | |
34 | =item $c->dispatch |
35 | |
36 | Dispatch request to actions. |
37 | |
38 | =cut |
39 | |
40 | sub dispatch { |
41 | my $c = shift; |
42 | my $action = $c->req->action; |
43 | my $namespace = ''; |
44 | $namespace = ( join( '/', @{ $c->req->args } ) || '/' ) |
45 | if $action eq 'default'; |
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46 | |
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47 | unless ($namespace) { |
48 | if ( my $result = $c->get_action($action) ) { |
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49 | $namespace = |
50 | Catalyst::Utils::class2prefix( $result->[0]->[0]->[0] ); |
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51 | } |
52 | } |
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53 | |
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54 | my $default = $action eq 'default' ? $namespace : undef; |
55 | my $results = $c->get_action( $action, $default ); |
56 | $namespace ||= '/'; |
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57 | |
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58 | if ( @{$results} ) { |
59 | |
60 | # Execute last begin |
61 | $c->state(1); |
62 | if ( my $begin = @{ $c->get_action( 'begin', $namespace ) }[-1] ) { |
63 | $c->execute( @{ $begin->[0] } ); |
64 | return if scalar @{ $c->error }; |
65 | } |
66 | |
67 | # Execute the auto chain |
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68 | my $auto = 0; |
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69 | for my $auto ( @{ $c->get_action( 'auto', $namespace ) } ) { |
70 | $c->execute( @{ $auto->[0] } ); |
71 | return if scalar @{ $c->error }; |
72 | last unless $c->state; |
61cfdd57 |
73 | $auto++; |
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74 | } |
75 | |
76 | # Execute the action or last default |
61cfdd57 |
77 | my $mkay = $auto ? $c->state ? 1 : 0 : 1; |
78 | if ( ( my $action = $c->req->action ) && $mkay ) { |
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79 | if ( my $result = @{ $c->get_action( $action, $default ) }[-1] ) { |
80 | $c->execute( @{ $result->[0] } ); |
81 | } |
82 | } |
83 | |
84 | # Execute last end |
85 | if ( my $end = @{ $c->get_action( 'end', $namespace ) }[-1] ) { |
86 | $c->execute( @{ $end->[0] } ); |
87 | return if scalar @{ $c->error }; |
88 | } |
89 | } |
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90 | |
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91 | else { |
92 | my $path = $c->req->path; |
93 | my $error = $path |
94 | ? qq/Unknown resource "$path"/ |
95 | : "No default action defined"; |
96 | $c->log->error($error) if $c->debug; |
97 | $c->error($error); |
98 | } |
99 | } |
100 | |
101 | =item $c->forward($command) |
102 | |
103 | Forward processing to a private action or a method from a class. |
104 | If you define a class without method it will default to process(). |
105 | |
106 | $c->forward('/foo'); |
107 | $c->forward('index'); |
108 | $c->forward(qw/MyApp::Model::CDBI::Foo do_stuff/); |
109 | $c->forward('MyApp::View::TT'); |
110 | |
111 | =cut |
112 | |
113 | sub forward { |
114 | my $c = shift; |
115 | my $command = shift; |
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116 | |
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117 | unless ($command) { |
118 | $c->log->debug('Nothing to forward to') if $c->debug; |
119 | return 0; |
120 | } |
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121 | |
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122 | my $caller = caller(0); |
123 | my $namespace = '/'; |
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124 | |
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125 | if ( $command =~ /^\// ) { |
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126 | $command =~ /^\/(.*)\/(\w+)$/; |
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127 | $namespace = $1 || '/'; |
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128 | $command = $2 || $command; |
129 | $command =~ s/^\///; |
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130 | } |
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131 | |
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132 | else { $namespace = Catalyst::Utils::class2prefix($caller) || '/' } |
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133 | |
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134 | my $results = $c->get_action( $command, $namespace ); |
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135 | |
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136 | unless ( @{$results} ) { |
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137 | my $class = $command || ''; |
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138 | |
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139 | if ( $class =~ /[^\w\:]/ ) { |
3b2ed580 |
140 | my $error = qq/Couldn't forward to "$class"/; |
141 | $c->error($error); |
142 | $c->log->debug($error) if $c->debug; |
1abd6db7 |
143 | return 0; |
144 | } |
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145 | |
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146 | my $method = shift || 'process'; |
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147 | |
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148 | if ( my $code = $class->can($method) ) { |
149 | $c->actions->{reverse}->{"$code"} = "$class->$method"; |
150 | $results = [ [ [ $class, $code ] ] ]; |
151 | } |
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152 | |
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153 | else { |
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154 | my $error = qq/Couldn't forward to "$class"/; |
3b2ed580 |
155 | $c->error($error); |
156 | $c->log->debug($error) |
1abd6db7 |
157 | if $c->debug; |
158 | return 0; |
159 | } |
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160 | |
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161 | } |
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162 | |
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163 | for my $result ( @{$results} ) { |
164 | $c->execute( @{ $result->[0] } ); |
165 | return if scalar @{ $c->error }; |
166 | last unless $c->state; |
167 | } |
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168 | |
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169 | return $c->state; |
170 | } |
171 | |
172 | =item $c->get_action( $action, $namespace ) |
173 | |
174 | Get an action in a given namespace. |
175 | |
176 | =cut |
177 | |
178 | sub get_action { |
179 | my ( $c, $action, $namespace ) = @_; |
180 | return [] unless $action; |
181 | $namespace ||= ''; |
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182 | |
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183 | if ($namespace) { |
184 | $namespace = '' if $namespace eq '/'; |
185 | my $parent = $c->tree; |
186 | my @results; |
187 | my %allowed = ( begin => 1, auto => 1, default => 1, end => 1 ); |
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188 | |
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189 | if ( $allowed{$action} ) { |
190 | my $result = $c->actions->{private}->{ $parent->getUID }->{$action}; |
191 | push @results, [$result] if $result; |
192 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
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193 | |
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194 | for my $part ( split '/', $namespace ) { |
195 | $visitor->setSearchPath($part); |
196 | $parent->accept($visitor); |
197 | my $child = $visitor->getResult; |
198 | my $uid = $child->getUID if $child; |
199 | my $match = $c->actions->{private}->{$uid}->{$action} if $uid; |
200 | push @results, [$match] if $match; |
201 | $parent = $child if $child; |
202 | } |
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203 | |
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204 | } |
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205 | |
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206 | else { |
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207 | |
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208 | if ($namespace) { |
209 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
210 | $visitor->setSearchPath( split '/', $namespace ); |
211 | $parent->accept($visitor); |
212 | my $child = $visitor->getResult; |
213 | my $uid = $child->getUID if $child; |
214 | my $match = $c->actions->{private}->{$uid}->{$action} |
215 | if $uid; |
216 | push @results, [$match] if $match; |
217 | } |
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218 | |
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219 | else { |
220 | my $result = |
221 | $c->actions->{private}->{ $parent->getUID }->{$action}; |
222 | push @results, [$result] if $result; |
223 | } |
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224 | |
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225 | } |
226 | return \@results; |
227 | } |
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228 | |
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229 | elsif ( my $p = $c->actions->{plain}->{$action} ) { return [ [$p] ] } |
230 | elsif ( my $r = $c->actions->{regex}->{$action} ) { return [ [$r] ] } |
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231 | |
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232 | else { |
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233 | |
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234 | for my $i ( 0 .. $#{ $c->actions->{compiled} } ) { |
235 | my $name = $c->actions->{compiled}->[$i]->[0]; |
236 | my $regex = $c->actions->{compiled}->[$i]->[1]; |
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237 | |
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238 | if ( $action =~ $regex ) { |
239 | my @snippets; |
240 | for my $i ( 1 .. 9 ) { |
241 | no strict 'refs'; |
242 | last unless ${$i}; |
243 | push @snippets, ${$i}; |
244 | } |
245 | return [ [ $c->actions->{regex}->{$name}, $name, \@snippets ] ]; |
246 | } |
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247 | |
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248 | } |
249 | } |
250 | return []; |
251 | } |
252 | |
253 | =item $c->set_action( $action, $code, $namespace, $attrs ) |
254 | |
255 | Set an action in a given namespace. |
256 | |
257 | =cut |
258 | |
259 | sub set_action { |
260 | my ( $c, $method, $code, $namespace, $attrs ) = @_; |
261 | |
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262 | my $prefix = Catalyst::Utils::class2prefix($namespace) || ''; |
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263 | my %flags; |
264 | |
265 | for my $attr ( @{$attrs} ) { |
266 | if ( $attr =~ /^(Local|Relative)$/ ) { $flags{local}++ } |
267 | elsif ( $attr =~ /^(Global|Absolute)$/ ) { $flags{global}++ } |
268 | elsif ( $attr =~ /^Path\((.+)\)$/i ) { $flags{path} = $1 } |
269 | elsif ( $attr =~ /^Private$/i ) { $flags{private}++ } |
270 | elsif ( $attr =~ /^(Regex|Regexp)\((.+)\)$/i ) { $flags{regex} = $2 } |
271 | } |
272 | |
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273 | if ( $flags{private} && ( keys %flags > 1 ) ) { |
8d4e224b |
274 | $c->log->debug( 'Bad action definition "' |
d0e524d2 |
275 | . join( ' ', @{$attrs} ) |
8d4e224b |
276 | . qq/" for "$namespace->$method"/ ) |
277 | if $c->debug; |
d0e524d2 |
278 | return; |
279 | } |
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280 | return unless keys %flags; |
281 | |
282 | my $parent = $c->tree; |
283 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
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284 | |
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285 | for my $part ( split '/', $prefix ) { |
286 | $visitor->setSearchPath($part); |
287 | $parent->accept($visitor); |
288 | my $child = $visitor->getResult; |
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289 | |
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290 | unless ($child) { |
291 | $child = $parent->addChild( Tree::Simple->new($part) ); |
292 | $visitor->setSearchPath($part); |
293 | $parent->accept($visitor); |
294 | $child = $visitor->getResult; |
295 | } |
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296 | |
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297 | $parent = $child; |
298 | } |
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299 | |
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300 | my $uid = $parent->getUID; |
301 | $c->actions->{private}->{$uid}->{$method} = [ $namespace, $code ]; |
302 | my $forward = $prefix ? "$prefix/$method" : $method; |
303 | |
304 | if ( $flags{path} ) { |
305 | $flags{path} =~ s/^\w+//; |
306 | $flags{path} =~ s/\w+$//; |
307 | if ( $flags{path} =~ /^'(.*)'$/ ) { $flags{path} = $1 } |
308 | if ( $flags{path} =~ /^"(.*)"$/ ) { $flags{path} = $1 } |
309 | } |
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310 | |
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311 | if ( $flags{regex} ) { |
312 | $flags{regex} =~ s/^\w+//; |
313 | $flags{regex} =~ s/\w+$//; |
314 | if ( $flags{regex} =~ /^'(.*)'$/ ) { $flags{regex} = $1 } |
315 | if ( $flags{regex} =~ /^"(.*)"$/ ) { $flags{regex} = $1 } |
316 | } |
317 | |
318 | my $reverse = $prefix ? "$prefix/$method" : $method; |
319 | |
320 | if ( $flags{local} || $flags{global} || $flags{path} ) { |
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321 | my $path = $flags{path} || $method; |
1abd6db7 |
322 | my $absolute = 0; |
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323 | |
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324 | if ( $path =~ /^\/(.+)/ ) { |
325 | $path = $1; |
326 | $absolute = 1; |
327 | } |
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328 | |
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329 | $absolute = 1 if $flags{global}; |
330 | my $name = $absolute ? $path : $prefix ? "$prefix/$path" : $path; |
331 | $c->actions->{plain}->{$name} = [ $namespace, $code ]; |
332 | } |
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333 | |
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334 | if ( my $regex = $flags{regex} ) { |
335 | push @{ $c->actions->{compiled} }, [ $regex, qr#$regex# ]; |
336 | $c->actions->{regex}->{$regex} = [ $namespace, $code ]; |
337 | } |
338 | |
339 | $c->actions->{reverse}->{"$code"} = $reverse; |
340 | } |
341 | |
342 | =item $class->setup_actions($component) |
343 | |
344 | Setup actions for a component. |
345 | |
346 | =cut |
347 | |
348 | sub setup_actions { |
349 | my ( $self, $comps ) = @_; |
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350 | |
1abd6db7 |
351 | for my $comp (@$comps) { |
352 | $comp = ref $comp || $comp; |
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353 | |
1abd6db7 |
354 | for my $action ( @{ $comp->_cache } ) { |
355 | my ( $code, $attrs ) = @{$action}; |
356 | my $name = ''; |
357 | no strict 'refs'; |
358 | my @cache = ( $comp, @{"$comp\::ISA"} ); |
359 | my %namespaces; |
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360 | |
1abd6db7 |
361 | while ( my $namespace = shift @cache ) { |
362 | $namespaces{$namespace}++; |
363 | for my $isa ( @{"$comp\::ISA"} ) { |
364 | next if $namespaces{$isa}; |
365 | push @cache, $isa; |
366 | $namespaces{$isa}++; |
367 | } |
368 | } |
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369 | |
1abd6db7 |
370 | for my $namespace ( keys %namespaces ) { |
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371 | |
1abd6db7 |
372 | for my $sym ( values %{ $namespace . '::' } ) { |
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373 | |
1abd6db7 |
374 | if ( *{$sym}{CODE} && *{$sym}{CODE} == $code ) { |
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375 | |
1abd6db7 |
376 | $name = *{$sym}{NAME}; |
377 | $self->set_action( $name, $code, $comp, $attrs ); |
378 | last; |
379 | } |
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380 | |
1abd6db7 |
381 | } |
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382 | |
1abd6db7 |
383 | } |
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384 | |
1abd6db7 |
385 | } |
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386 | |
1abd6db7 |
387 | } |
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388 | |
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389 | my $actions = $self->actions; |
390 | my $privates = Text::ASCIITable->new; |
5fbed090 |
391 | $privates->setCols( 'Private', 'Class' ); |
392 | $privates->setColWidth( 'Private', 36, 1 ); |
393 | $privates->setColWidth( 'Class', 37, 1 ); |
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394 | |
1abd6db7 |
395 | my $walker = sub { |
396 | my ( $walker, $parent, $prefix ) = @_; |
397 | $prefix .= $parent->getNodeValue || ''; |
398 | $prefix .= '/' unless $prefix =~ /\/$/; |
399 | my $uid = $parent->getUID; |
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400 | |
1abd6db7 |
401 | for my $action ( keys %{ $actions->{private}->{$uid} } ) { |
402 | my ( $class, $code ) = @{ $actions->{private}->{$uid}->{$action} }; |
d36e81fd |
403 | $privates->addRow( "$prefix$action", $class ); |
1abd6db7 |
404 | } |
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405 | |
1abd6db7 |
406 | $walker->( $walker, $_, $prefix ) for $parent->getAllChildren; |
407 | }; |
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408 | |
1abd6db7 |
409 | $walker->( $walker, $self->tree, '' ); |
410 | $self->log->debug( 'Loaded private actions', $privates->draw ) |
411 | if ( @{ $privates->{tbl_rows} } && $self->debug ); |
99fe1710 |
412 | |
1abd6db7 |
413 | my $publics = Text::ASCIITable->new; |
414 | $publics->setCols( 'Public', 'Private' ); |
699e1247 |
415 | $publics->setColWidth( 'Public', 36, 1 ); |
416 | $publics->setColWidth( 'Private', 37, 1 ); |
99fe1710 |
417 | |
1abd6db7 |
418 | for my $plain ( sort keys %{ $actions->{plain} } ) { |
419 | my ( $class, $code ) = @{ $actions->{plain}->{$plain} }; |
7ace516e |
420 | my $reverse = $self->actions->{reverse}->{$code}; |
421 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
422 | $publics->addRow( "/$plain", $reverse ); |
1abd6db7 |
423 | } |
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424 | |
1abd6db7 |
425 | $self->log->debug( 'Loaded public actions', $publics->draw ) |
426 | if ( @{ $publics->{tbl_rows} } && $self->debug ); |
99fe1710 |
427 | |
1abd6db7 |
428 | my $regexes = Text::ASCIITable->new; |
429 | $regexes->setCols( 'Regex', 'Private' ); |
699e1247 |
430 | $regexes->setColWidth( 'Regex', 36, 1 ); |
431 | $regexes->setColWidth( 'Private', 37, 1 ); |
99fe1710 |
432 | |
1abd6db7 |
433 | for my $regex ( sort keys %{ $actions->{regex} } ) { |
434 | my ( $class, $code ) = @{ $actions->{regex}->{$regex} }; |
7ace516e |
435 | my $reverse = $self->actions->{reverse}->{$code}; |
436 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
437 | $regexes->addRow( $regex, $reverse ); |
1abd6db7 |
438 | } |
99fe1710 |
439 | |
1abd6db7 |
440 | $self->log->debug( 'Loaded regex actions', $regexes->draw ) |
441 | if ( @{ $regexes->{tbl_rows} } && $self->debug ); |
442 | } |
443 | |
1abd6db7 |
444 | =back |
445 | |
446 | =head1 AUTHOR |
447 | |
448 | Sebastian Riedel, C<sri@cpan.org> |
449 | |
450 | =head1 COPYRIGHT |
451 | |
452 | This program is free software, you can redistribute it and/or modify it under |
453 | the same terms as Perl itself. |
454 | |
455 | =cut |
456 | |
457 | 1; |