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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 | =head1 NAME |
13 | |
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14 | Catalyst::Dispatcher - The Catalyst Dispatcher |
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15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | See L<Catalyst>. |
19 | |
20 | =head1 DESCRIPTION |
21 | |
22 | =head1 METHODS |
23 | |
24 | =over 4 |
25 | |
26 | =item $c->dispatch |
27 | |
28 | Dispatch request to actions. |
29 | |
30 | =cut |
31 | |
32 | sub dispatch { |
33 | my $c = shift; |
34 | my $action = $c->req->action; |
35 | my $namespace = ''; |
36 | $namespace = ( join( '/', @{ $c->req->args } ) || '/' ) |
37 | if $action eq 'default'; |
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38 | |
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39 | unless ($namespace) { |
40 | if ( my $result = $c->get_action($action) ) { |
e494bd6b |
41 | $namespace = Catalyst::Utils::class2prefix( $result->[0]->[0]->[0], |
42 | $c->config->{case_sensitive} ); |
1abd6db7 |
43 | } |
44 | } |
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45 | |
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46 | my $default = $action eq 'default' ? $namespace : undef; |
2d16b61a |
47 | my $results = $c->get_action( $action, $default, $default ? 1 : 0 ); |
1abd6db7 |
48 | $namespace ||= '/'; |
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49 | |
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50 | if ( @{$results} ) { |
51 | |
52 | # Execute last begin |
53 | $c->state(1); |
2d16b61a |
54 | if ( my $begin = @{ $c->get_action( 'begin', $namespace, 1 ) }[-1] ) { |
1abd6db7 |
55 | $c->execute( @{ $begin->[0] } ); |
56 | return if scalar @{ $c->error }; |
57 | } |
58 | |
59 | # Execute the auto chain |
1196a46d |
60 | my $autorun = 0; |
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61 | for my $auto ( @{ $c->get_action( 'auto', $namespace, 1 ) } ) { |
62 | $autorun++; |
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63 | $c->execute( @{ $auto->[0] } ); |
64 | return if scalar @{ $c->error }; |
65 | last unless $c->state; |
66 | } |
67 | |
68 | # Execute the action or last default |
e5f21aa2 |
69 | my $mkay = $autorun ? $c->state ? 1 : 0 : 1; |
61cfdd57 |
70 | if ( ( my $action = $c->req->action ) && $mkay ) { |
2d16b61a |
71 | if ( my $result = @{ $c->get_action( $action, $default, 1 ) }[-1] ) |
72 | { |
1abd6db7 |
73 | $c->execute( @{ $result->[0] } ); |
74 | } |
75 | } |
76 | |
77 | # Execute last end |
2d16b61a |
78 | if ( my $end = @{ $c->get_action( 'end', $namespace, 1 ) }[-1] ) { |
1abd6db7 |
79 | $c->execute( @{ $end->[0] } ); |
80 | return if scalar @{ $c->error }; |
81 | } |
82 | } |
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83 | |
1abd6db7 |
84 | else { |
85 | my $path = $c->req->path; |
86 | my $error = $path |
87 | ? qq/Unknown resource "$path"/ |
88 | : "No default action defined"; |
89 | $c->log->error($error) if $c->debug; |
90 | $c->error($error); |
91 | } |
92 | } |
93 | |
94 | =item $c->forward($command) |
95 | |
96 | Forward processing to a private action or a method from a class. |
97 | If you define a class without method it will default to process(). |
98 | |
99 | $c->forward('/foo'); |
100 | $c->forward('index'); |
101 | $c->forward(qw/MyApp::Model::CDBI::Foo do_stuff/); |
102 | $c->forward('MyApp::View::TT'); |
103 | |
104 | =cut |
105 | |
106 | sub forward { |
107 | my $c = shift; |
108 | my $command = shift; |
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109 | |
1abd6db7 |
110 | unless ($command) { |
111 | $c->log->debug('Nothing to forward to') if $c->debug; |
112 | return 0; |
113 | } |
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114 | |
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115 | my $caller = caller(0); |
116 | my $namespace = '/'; |
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117 | |
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118 | if ( $command =~ /^\// ) { |
db0ca23c |
119 | $command =~ /^\/(.*)\/(\w+)$/; |
1abd6db7 |
120 | $namespace = $1 || '/'; |
db0ca23c |
121 | $command = $2 || $command; |
122 | $command =~ s/^\///; |
1abd6db7 |
123 | } |
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124 | |
e494bd6b |
125 | else { |
126 | $namespace = |
127 | Catalyst::Utils::class2prefix( $caller, $c->config->{case_sensitive} ) |
128 | || '/'; |
129 | } |
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130 | |
1abd6db7 |
131 | my $results = $c->get_action( $command, $namespace ); |
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132 | |
1abd6db7 |
133 | unless ( @{$results} ) { |
cd677e12 |
134 | my $class = $command || ''; |
812a28c9 |
135 | my $path = $class . '.pm'; |
fe14cf78 |
136 | $path =~ s/::/\//g; |
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137 | |
812a28c9 |
138 | unless ( $INC{$path} ) { |
139 | my $error = |
140 | qq/Couldn't forward to "$class". Invalid or not loaded./; |
3b2ed580 |
141 | $c->error($error); |
142 | $c->log->debug($error) if $c->debug; |
1abd6db7 |
143 | return 0; |
144 | } |
812a28c9 |
145 | |
3245f607 |
146 | unless ( UNIVERSAL::isa( $class, 'Catalyst::Base' ) ) { |
812a28c9 |
147 | my $error = |
148 | qq/Can't forward to "$class". Class is not a Catalyst component./; |
3245f607 |
149 | $c->error($error); |
150 | $c->log->debug($error) if $c->debug; |
812a28c9 |
151 | return 0; |
3245f607 |
152 | } |
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153 | |
1abd6db7 |
154 | my $method = shift || 'process'; |
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155 | |
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156 | if ( my $code = $class->can($method) ) { |
157 | $c->actions->{reverse}->{"$code"} = "$class->$method"; |
158 | $results = [ [ [ $class, $code ] ] ]; |
159 | } |
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160 | |
1abd6db7 |
161 | else { |
812a28c9 |
162 | my $error = |
163 | qq/Couldn't forward to "$class". Does not implement "$method"/; |
3b2ed580 |
164 | $c->error($error); |
165 | $c->log->debug($error) |
1abd6db7 |
166 | if $c->debug; |
167 | return 0; |
168 | } |
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169 | |
1abd6db7 |
170 | } |
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171 | |
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172 | for my $result ( @{$results} ) { |
173 | $c->execute( @{ $result->[0] } ); |
174 | return if scalar @{ $c->error }; |
175 | last unless $c->state; |
176 | } |
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177 | |
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178 | return $c->state; |
179 | } |
180 | |
2d16b61a |
181 | =item $c->get_action( $action, $namespace, $inherit ) |
1abd6db7 |
182 | |
183 | Get an action in a given namespace. |
184 | |
185 | =cut |
186 | |
187 | sub get_action { |
2d16b61a |
188 | my ( $c, $action, $namespace, $inherit ) = @_; |
1abd6db7 |
189 | return [] unless $action; |
190 | $namespace ||= ''; |
2d16b61a |
191 | $inherit ||= 0; |
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192 | |
1abd6db7 |
193 | if ($namespace) { |
194 | $namespace = '' if $namespace eq '/'; |
195 | my $parent = $c->tree; |
196 | my @results; |
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197 | |
2d16b61a |
198 | if ($inherit) { |
1abd6db7 |
199 | my $result = $c->actions->{private}->{ $parent->getUID }->{$action}; |
200 | push @results, [$result] if $result; |
201 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
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202 | |
1abd6db7 |
203 | for my $part ( split '/', $namespace ) { |
204 | $visitor->setSearchPath($part); |
205 | $parent->accept($visitor); |
206 | my $child = $visitor->getResult; |
207 | my $uid = $child->getUID if $child; |
208 | my $match = $c->actions->{private}->{$uid}->{$action} if $uid; |
209 | push @results, [$match] if $match; |
210 | $parent = $child if $child; |
211 | } |
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212 | |
1abd6db7 |
213 | } |
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214 | |
1abd6db7 |
215 | else { |
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216 | |
1abd6db7 |
217 | if ($namespace) { |
218 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
219 | $visitor->setSearchPath( split '/', $namespace ); |
220 | $parent->accept($visitor); |
221 | my $child = $visitor->getResult; |
222 | my $uid = $child->getUID if $child; |
223 | my $match = $c->actions->{private}->{$uid}->{$action} |
224 | if $uid; |
225 | push @results, [$match] if $match; |
226 | } |
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227 | |
1abd6db7 |
228 | else { |
229 | my $result = |
230 | $c->actions->{private}->{ $parent->getUID }->{$action}; |
231 | push @results, [$result] if $result; |
232 | } |
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233 | |
1abd6db7 |
234 | } |
235 | return \@results; |
236 | } |
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237 | |
1abd6db7 |
238 | elsif ( my $p = $c->actions->{plain}->{$action} ) { return [ [$p] ] } |
239 | elsif ( my $r = $c->actions->{regex}->{$action} ) { return [ [$r] ] } |
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240 | |
1abd6db7 |
241 | else { |
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242 | |
1abd6db7 |
243 | for my $i ( 0 .. $#{ $c->actions->{compiled} } ) { |
244 | my $name = $c->actions->{compiled}->[$i]->[0]; |
245 | my $regex = $c->actions->{compiled}->[$i]->[1]; |
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246 | |
2d752b2a |
247 | if ( my @snippets = ( $action =~ $regex ) ) { |
1abd6db7 |
248 | return [ [ $c->actions->{regex}->{$name}, $name, \@snippets ] ]; |
249 | } |
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250 | |
1abd6db7 |
251 | } |
252 | } |
253 | return []; |
254 | } |
255 | |
256 | =item $c->set_action( $action, $code, $namespace, $attrs ) |
257 | |
258 | Set an action in a given namespace. |
259 | |
260 | =cut |
261 | |
262 | sub set_action { |
263 | my ( $c, $method, $code, $namespace, $attrs ) = @_; |
264 | |
e494bd6b |
265 | my $prefix = |
266 | Catalyst::Utils::class2prefix( $namespace, $c->config->{case_sensitive} ) |
267 | || ''; |
1abd6db7 |
268 | my %flags; |
269 | |
270 | for my $attr ( @{$attrs} ) { |
0299ba22 |
271 | if ( $attr =~ /^(Local|Relative)$/ ) { $flags{local}++ } |
272 | elsif ( $attr =~ /^(Global|Absolute)$/ ) { $flags{global}++ } |
273 | elsif ( $attr =~ /^Path\(\s*(.+)\s*\)$/i ) { $flags{path} = $1 } |
274 | elsif ( $attr =~ /^Private$/i ) { $flags{private}++ } |
275 | elsif ( $attr =~ /^(Regex|Regexp)\(\s*(.+)\s*\)$/i ) { |
276 | $flags{regex} = $2; |
277 | } |
1abd6db7 |
278 | } |
279 | |
d0e524d2 |
280 | if ( $flags{private} && ( keys %flags > 1 ) ) { |
8d4e224b |
281 | $c->log->debug( 'Bad action definition "' |
d0e524d2 |
282 | . join( ' ', @{$attrs} ) |
8d4e224b |
283 | . qq/" for "$namespace->$method"/ ) |
284 | if $c->debug; |
d0e524d2 |
285 | return; |
286 | } |
1abd6db7 |
287 | return unless keys %flags; |
288 | |
289 | my $parent = $c->tree; |
290 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
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291 | |
1abd6db7 |
292 | for my $part ( split '/', $prefix ) { |
293 | $visitor->setSearchPath($part); |
294 | $parent->accept($visitor); |
295 | my $child = $visitor->getResult; |
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296 | |
1abd6db7 |
297 | unless ($child) { |
298 | $child = $parent->addChild( Tree::Simple->new($part) ); |
299 | $visitor->setSearchPath($part); |
300 | $parent->accept($visitor); |
301 | $child = $visitor->getResult; |
302 | } |
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303 | |
1abd6db7 |
304 | $parent = $child; |
305 | } |
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306 | |
1abd6db7 |
307 | my $uid = $parent->getUID; |
308 | $c->actions->{private}->{$uid}->{$method} = [ $namespace, $code ]; |
309 | my $forward = $prefix ? "$prefix/$method" : $method; |
310 | |
311 | if ( $flags{path} ) { |
312 | $flags{path} =~ s/^\w+//; |
313 | $flags{path} =~ s/\w+$//; |
314 | if ( $flags{path} =~ /^'(.*)'$/ ) { $flags{path} = $1 } |
315 | if ( $flags{path} =~ /^"(.*)"$/ ) { $flags{path} = $1 } |
316 | } |
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317 | |
1abd6db7 |
318 | if ( $flags{regex} ) { |
319 | $flags{regex} =~ s/^\w+//; |
320 | $flags{regex} =~ s/\w+$//; |
321 | if ( $flags{regex} =~ /^'(.*)'$/ ) { $flags{regex} = $1 } |
322 | if ( $flags{regex} =~ /^"(.*)"$/ ) { $flags{regex} = $1 } |
323 | } |
324 | |
325 | my $reverse = $prefix ? "$prefix/$method" : $method; |
326 | |
327 | if ( $flags{local} || $flags{global} || $flags{path} ) { |
99fe1710 |
328 | my $path = $flags{path} || $method; |
1abd6db7 |
329 | my $absolute = 0; |
99fe1710 |
330 | |
1abd6db7 |
331 | if ( $path =~ /^\/(.+)/ ) { |
332 | $path = $1; |
333 | $absolute = 1; |
334 | } |
99fe1710 |
335 | |
1abd6db7 |
336 | $absolute = 1 if $flags{global}; |
337 | my $name = $absolute ? $path : $prefix ? "$prefix/$path" : $path; |
338 | $c->actions->{plain}->{$name} = [ $namespace, $code ]; |
339 | } |
99fe1710 |
340 | |
1abd6db7 |
341 | if ( my $regex = $flags{regex} ) { |
342 | push @{ $c->actions->{compiled} }, [ $regex, qr#$regex# ]; |
343 | $c->actions->{regex}->{$regex} = [ $namespace, $code ]; |
344 | } |
345 | |
346 | $c->actions->{reverse}->{"$code"} = $reverse; |
347 | } |
348 | |
349 | =item $class->setup_actions($component) |
350 | |
351 | Setup actions for a component. |
352 | |
353 | =cut |
354 | |
355 | sub setup_actions { |
a268a011 |
356 | my $self = shift; |
99fe1710 |
357 | |
12e28165 |
358 | # These are the core structures |
359 | $self->actions( |
360 | { |
361 | plain => {}, |
362 | private => {}, |
363 | regex => {}, |
364 | compiled => [], |
365 | reverse => {} |
366 | } |
367 | ); |
368 | |
369 | # We use a tree |
370 | $self->tree( Tree::Simple->new( 0, Tree::Simple->ROOT ) ); |
e494bd6b |
371 | |
a268a011 |
372 | for my $comp ( keys %{ $self->components } ) { |
e494bd6b |
373 | |
374 | # We only setup components that inherit from Catalyst::Base |
a268a011 |
375 | next unless $comp->isa('Catalyst::Base'); |
99fe1710 |
376 | |
812a28c9 |
377 | for my $action ( @{ Catalyst::Utils::reflect_actions($comp) } ) { |
1abd6db7 |
378 | my ( $code, $attrs ) = @{$action}; |
379 | my $name = ''; |
380 | no strict 'refs'; |
381 | my @cache = ( $comp, @{"$comp\::ISA"} ); |
382 | my %namespaces; |
99fe1710 |
383 | |
1abd6db7 |
384 | while ( my $namespace = shift @cache ) { |
385 | $namespaces{$namespace}++; |
386 | for my $isa ( @{"$comp\::ISA"} ) { |
387 | next if $namespaces{$isa}; |
388 | push @cache, $isa; |
389 | $namespaces{$isa}++; |
390 | } |
391 | } |
99fe1710 |
392 | |
1abd6db7 |
393 | for my $namespace ( keys %namespaces ) { |
99fe1710 |
394 | |
1abd6db7 |
395 | for my $sym ( values %{ $namespace . '::' } ) { |
99fe1710 |
396 | |
1abd6db7 |
397 | if ( *{$sym}{CODE} && *{$sym}{CODE} == $code ) { |
99fe1710 |
398 | |
1abd6db7 |
399 | $name = *{$sym}{NAME}; |
400 | $self->set_action( $name, $code, $comp, $attrs ); |
401 | last; |
402 | } |
99fe1710 |
403 | |
1abd6db7 |
404 | } |
99fe1710 |
405 | |
1abd6db7 |
406 | } |
99fe1710 |
407 | |
1abd6db7 |
408 | } |
99fe1710 |
409 | |
1abd6db7 |
410 | } |
e494bd6b |
411 | |
a268a011 |
412 | return unless $self->debug; |
99fe1710 |
413 | |
1abd6db7 |
414 | my $actions = $self->actions; |
415 | my $privates = Text::ASCIITable->new; |
5fbed090 |
416 | $privates->setCols( 'Private', 'Class' ); |
417 | $privates->setColWidth( 'Private', 36, 1 ); |
418 | $privates->setColWidth( 'Class', 37, 1 ); |
99fe1710 |
419 | |
1abd6db7 |
420 | my $walker = sub { |
421 | my ( $walker, $parent, $prefix ) = @_; |
422 | $prefix .= $parent->getNodeValue || ''; |
423 | $prefix .= '/' unless $prefix =~ /\/$/; |
424 | my $uid = $parent->getUID; |
99fe1710 |
425 | |
1abd6db7 |
426 | for my $action ( keys %{ $actions->{private}->{$uid} } ) { |
427 | my ( $class, $code ) = @{ $actions->{private}->{$uid}->{$action} }; |
d36e81fd |
428 | $privates->addRow( "$prefix$action", $class ); |
1abd6db7 |
429 | } |
99fe1710 |
430 | |
1abd6db7 |
431 | $walker->( $walker, $_, $prefix ) for $parent->getAllChildren; |
432 | }; |
99fe1710 |
433 | |
1abd6db7 |
434 | $walker->( $walker, $self->tree, '' ); |
435 | $self->log->debug( 'Loaded private actions', $privates->draw ) |
a268a011 |
436 | if ( @{ $privates->{tbl_rows} } ); |
99fe1710 |
437 | |
1abd6db7 |
438 | my $publics = Text::ASCIITable->new; |
439 | $publics->setCols( 'Public', 'Private' ); |
699e1247 |
440 | $publics->setColWidth( 'Public', 36, 1 ); |
441 | $publics->setColWidth( 'Private', 37, 1 ); |
99fe1710 |
442 | |
1abd6db7 |
443 | for my $plain ( sort keys %{ $actions->{plain} } ) { |
444 | my ( $class, $code ) = @{ $actions->{plain}->{$plain} }; |
7ace516e |
445 | my $reverse = $self->actions->{reverse}->{$code}; |
446 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
447 | $publics->addRow( "/$plain", $reverse ); |
1abd6db7 |
448 | } |
99fe1710 |
449 | |
1abd6db7 |
450 | $self->log->debug( 'Loaded public actions', $publics->draw ) |
a268a011 |
451 | if ( @{ $publics->{tbl_rows} } ); |
99fe1710 |
452 | |
1abd6db7 |
453 | my $regexes = Text::ASCIITable->new; |
454 | $regexes->setCols( 'Regex', 'Private' ); |
699e1247 |
455 | $regexes->setColWidth( 'Regex', 36, 1 ); |
456 | $regexes->setColWidth( 'Private', 37, 1 ); |
99fe1710 |
457 | |
1abd6db7 |
458 | for my $regex ( sort keys %{ $actions->{regex} } ) { |
459 | my ( $class, $code ) = @{ $actions->{regex}->{$regex} }; |
7ace516e |
460 | my $reverse = $self->actions->{reverse}->{$code}; |
461 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
462 | $regexes->addRow( $regex, $reverse ); |
1abd6db7 |
463 | } |
99fe1710 |
464 | |
1abd6db7 |
465 | $self->log->debug( 'Loaded regex actions', $regexes->draw ) |
a268a011 |
466 | if ( @{ $regexes->{tbl_rows} } ); |
1abd6db7 |
467 | } |
468 | |
1abd6db7 |
469 | =back |
470 | |
471 | =head1 AUTHOR |
472 | |
473 | Sebastian Riedel, C<sri@cpan.org> |
474 | |
475 | =head1 COPYRIGHT |
476 | |
477 | This program is free software, you can redistribute it and/or modify it under |
478 | the same terms as Perl itself. |
479 | |
480 | =cut |
481 | |
482 | 1; |