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1 | package Catalyst::Dispatcher; |
1abd6db7 |
2 | |
3 | use strict; |
4 | use base 'Class::Data::Inheritable'; |
5 | use Memoize; |
6 | use Text::ASCIITable; |
1abd6db7 |
7 | use Tree::Simple; |
8 | use Tree::Simple::Visitor::FindByPath; |
9 | |
10 | __PACKAGE__->mk_classdata($_) for qw/actions tree/; |
11 | |
12 | __PACKAGE__->actions( |
13 | { plain => {}, private => {}, regex => {}, compiled => [], reverse => {} } |
14 | ); |
15 | __PACKAGE__->tree( Tree::Simple->new( 0, Tree::Simple->ROOT ) ); |
16 | |
17 | memoize('_class2prefix'); |
18 | |
19 | =head1 NAME |
20 | |
21 | Catalyst::Dispatch - The Catalyst Dispatcher |
22 | |
23 | =head1 SYNOPSIS |
24 | |
25 | See L<Catalyst>. |
26 | |
27 | =head1 DESCRIPTION |
28 | |
29 | =head1 METHODS |
30 | |
31 | =over 4 |
32 | |
33 | =item $c->dispatch |
34 | |
35 | Dispatch request to actions. |
36 | |
37 | =cut |
38 | |
39 | sub dispatch { |
40 | my $c = shift; |
41 | my $action = $c->req->action; |
42 | my $namespace = ''; |
43 | $namespace = ( join( '/', @{ $c->req->args } ) || '/' ) |
44 | if $action eq 'default'; |
45 | unless ($namespace) { |
46 | if ( my $result = $c->get_action($action) ) { |
47 | $namespace = _class2prefix( $result->[0]->[0]->[0] ); |
48 | } |
49 | } |
50 | my $default = $action eq 'default' ? $namespace : undef; |
51 | my $results = $c->get_action( $action, $default ); |
52 | $namespace ||= '/'; |
53 | if ( @{$results} ) { |
54 | |
55 | # Execute last begin |
56 | $c->state(1); |
57 | if ( my $begin = @{ $c->get_action( 'begin', $namespace ) }[-1] ) { |
58 | $c->execute( @{ $begin->[0] } ); |
59 | return if scalar @{ $c->error }; |
60 | } |
61 | |
62 | # Execute the auto chain |
61cfdd57 |
63 | my $auto = 0; |
1abd6db7 |
64 | for my $auto ( @{ $c->get_action( 'auto', $namespace ) } ) { |
65 | $c->execute( @{ $auto->[0] } ); |
66 | return if scalar @{ $c->error }; |
67 | last unless $c->state; |
61cfdd57 |
68 | $auto++; |
1abd6db7 |
69 | } |
70 | |
71 | # Execute the action or last default |
61cfdd57 |
72 | my $mkay = $auto ? $c->state ? 1 : 0 : 1; |
73 | if ( ( my $action = $c->req->action ) && $mkay ) { |
1abd6db7 |
74 | if ( my $result = @{ $c->get_action( $action, $default ) }[-1] ) { |
75 | $c->execute( @{ $result->[0] } ); |
76 | } |
77 | } |
78 | |
79 | # Execute last end |
80 | if ( my $end = @{ $c->get_action( 'end', $namespace ) }[-1] ) { |
81 | $c->execute( @{ $end->[0] } ); |
82 | return if scalar @{ $c->error }; |
83 | } |
84 | } |
85 | else { |
86 | my $path = $c->req->path; |
87 | my $error = $path |
88 | ? qq/Unknown resource "$path"/ |
89 | : "No default action defined"; |
90 | $c->log->error($error) if $c->debug; |
91 | $c->error($error); |
92 | } |
93 | } |
94 | |
95 | =item $c->forward($command) |
96 | |
97 | Forward processing to a private action or a method from a class. |
98 | If you define a class without method it will default to process(). |
99 | |
100 | $c->forward('/foo'); |
101 | $c->forward('index'); |
102 | $c->forward(qw/MyApp::Model::CDBI::Foo do_stuff/); |
103 | $c->forward('MyApp::View::TT'); |
104 | |
105 | =cut |
106 | |
107 | sub forward { |
108 | my $c = shift; |
109 | my $command = shift; |
110 | unless ($command) { |
111 | $c->log->debug('Nothing to forward to') if $c->debug; |
112 | return 0; |
113 | } |
114 | my $caller = caller(0); |
115 | my $namespace = '/'; |
116 | if ( $command =~ /^\// ) { |
cd677e12 |
117 | $command =~ /^(.*)\/(\w+)$/; |
1abd6db7 |
118 | $namespace = $1 || '/'; |
cd677e12 |
119 | $namespace = s/^\/// if $namespace ne '/'; |
1abd6db7 |
120 | $command = $2; |
121 | } |
122 | else { $namespace = _class2prefix($caller) || '/' } |
123 | my $results = $c->get_action( $command, $namespace ); |
124 | unless ( @{$results} ) { |
cd677e12 |
125 | my $class = $command || ''; |
1abd6db7 |
126 | if ( $class =~ /[^\w\:]/ ) { |
3b2ed580 |
127 | my $error = qq/Couldn't forward to "$class"/; |
128 | $c->error($error); |
129 | $c->log->debug($error) if $c->debug; |
1abd6db7 |
130 | return 0; |
131 | } |
132 | my $method = shift || 'process'; |
133 | if ( my $code = $class->can($method) ) { |
134 | $c->actions->{reverse}->{"$code"} = "$class->$method"; |
135 | $results = [ [ [ $class, $code ] ] ]; |
136 | } |
137 | else { |
cd677e12 |
138 | my $error = qq/Couldn't forward to "$class"/; |
3b2ed580 |
139 | $c->error($error); |
140 | $c->log->debug($error) |
1abd6db7 |
141 | if $c->debug; |
142 | return 0; |
143 | } |
144 | } |
145 | for my $result ( @{$results} ) { |
146 | $c->execute( @{ $result->[0] } ); |
147 | return if scalar @{ $c->error }; |
148 | last unless $c->state; |
149 | } |
150 | return $c->state; |
151 | } |
152 | |
153 | =item $c->get_action( $action, $namespace ) |
154 | |
155 | Get an action in a given namespace. |
156 | |
157 | =cut |
158 | |
159 | sub get_action { |
160 | my ( $c, $action, $namespace ) = @_; |
161 | return [] unless $action; |
162 | $namespace ||= ''; |
163 | if ($namespace) { |
164 | $namespace = '' if $namespace eq '/'; |
165 | my $parent = $c->tree; |
166 | my @results; |
167 | my %allowed = ( begin => 1, auto => 1, default => 1, end => 1 ); |
168 | if ( $allowed{$action} ) { |
169 | my $result = $c->actions->{private}->{ $parent->getUID }->{$action}; |
170 | push @results, [$result] if $result; |
171 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
172 | for my $part ( split '/', $namespace ) { |
173 | $visitor->setSearchPath($part); |
174 | $parent->accept($visitor); |
175 | my $child = $visitor->getResult; |
176 | my $uid = $child->getUID if $child; |
177 | my $match = $c->actions->{private}->{$uid}->{$action} if $uid; |
178 | push @results, [$match] if $match; |
179 | $parent = $child if $child; |
180 | } |
181 | } |
182 | else { |
183 | if ($namespace) { |
184 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
185 | $visitor->setSearchPath( split '/', $namespace ); |
186 | $parent->accept($visitor); |
187 | my $child = $visitor->getResult; |
188 | my $uid = $child->getUID if $child; |
189 | my $match = $c->actions->{private}->{$uid}->{$action} |
190 | if $uid; |
191 | push @results, [$match] if $match; |
192 | } |
193 | else { |
194 | my $result = |
195 | $c->actions->{private}->{ $parent->getUID }->{$action}; |
196 | push @results, [$result] if $result; |
197 | } |
198 | } |
199 | return \@results; |
200 | } |
201 | elsif ( my $p = $c->actions->{plain}->{$action} ) { return [ [$p] ] } |
202 | elsif ( my $r = $c->actions->{regex}->{$action} ) { return [ [$r] ] } |
203 | else { |
204 | for my $i ( 0 .. $#{ $c->actions->{compiled} } ) { |
205 | my $name = $c->actions->{compiled}->[$i]->[0]; |
206 | my $regex = $c->actions->{compiled}->[$i]->[1]; |
207 | if ( $action =~ $regex ) { |
208 | my @snippets; |
209 | for my $i ( 1 .. 9 ) { |
210 | no strict 'refs'; |
211 | last unless ${$i}; |
212 | push @snippets, ${$i}; |
213 | } |
214 | return [ [ $c->actions->{regex}->{$name}, $name, \@snippets ] ]; |
215 | } |
216 | } |
217 | } |
218 | return []; |
219 | } |
220 | |
221 | =item $c->set_action( $action, $code, $namespace, $attrs ) |
222 | |
223 | Set an action in a given namespace. |
224 | |
225 | =cut |
226 | |
227 | sub set_action { |
228 | my ( $c, $method, $code, $namespace, $attrs ) = @_; |
229 | |
230 | my $prefix = _class2prefix($namespace) || ''; |
231 | my %flags; |
232 | |
233 | for my $attr ( @{$attrs} ) { |
234 | if ( $attr =~ /^(Local|Relative)$/ ) { $flags{local}++ } |
235 | elsif ( $attr =~ /^(Global|Absolute)$/ ) { $flags{global}++ } |
236 | elsif ( $attr =~ /^Path\((.+)\)$/i ) { $flags{path} = $1 } |
237 | elsif ( $attr =~ /^Private$/i ) { $flags{private}++ } |
238 | elsif ( $attr =~ /^(Regex|Regexp)\((.+)\)$/i ) { $flags{regex} = $2 } |
239 | } |
240 | |
d0e524d2 |
241 | if ( $flags{private} && ( keys %flags > 1 ) ) { |
8d4e224b |
242 | $c->log->debug( 'Bad action definition "' |
d0e524d2 |
243 | . join( ' ', @{$attrs} ) |
8d4e224b |
244 | . qq/" for "$namespace->$method"/ ) |
245 | if $c->debug; |
d0e524d2 |
246 | return; |
247 | } |
1abd6db7 |
248 | return unless keys %flags; |
249 | |
250 | my $parent = $c->tree; |
251 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
252 | for my $part ( split '/', $prefix ) { |
253 | $visitor->setSearchPath($part); |
254 | $parent->accept($visitor); |
255 | my $child = $visitor->getResult; |
256 | unless ($child) { |
257 | $child = $parent->addChild( Tree::Simple->new($part) ); |
258 | $visitor->setSearchPath($part); |
259 | $parent->accept($visitor); |
260 | $child = $visitor->getResult; |
261 | } |
262 | $parent = $child; |
263 | } |
264 | my $uid = $parent->getUID; |
265 | $c->actions->{private}->{$uid}->{$method} = [ $namespace, $code ]; |
266 | my $forward = $prefix ? "$prefix/$method" : $method; |
267 | |
268 | if ( $flags{path} ) { |
269 | $flags{path} =~ s/^\w+//; |
270 | $flags{path} =~ s/\w+$//; |
271 | if ( $flags{path} =~ /^'(.*)'$/ ) { $flags{path} = $1 } |
272 | if ( $flags{path} =~ /^"(.*)"$/ ) { $flags{path} = $1 } |
273 | } |
274 | if ( $flags{regex} ) { |
275 | $flags{regex} =~ s/^\w+//; |
276 | $flags{regex} =~ s/\w+$//; |
277 | if ( $flags{regex} =~ /^'(.*)'$/ ) { $flags{regex} = $1 } |
278 | if ( $flags{regex} =~ /^"(.*)"$/ ) { $flags{regex} = $1 } |
279 | } |
280 | |
281 | my $reverse = $prefix ? "$prefix/$method" : $method; |
282 | |
283 | if ( $flags{local} || $flags{global} || $flags{path} ) { |
284 | my $path = $flags{path} || $method; |
285 | my $absolute = 0; |
286 | if ( $path =~ /^\/(.+)/ ) { |
287 | $path = $1; |
288 | $absolute = 1; |
289 | } |
290 | $absolute = 1 if $flags{global}; |
291 | my $name = $absolute ? $path : $prefix ? "$prefix/$path" : $path; |
292 | $c->actions->{plain}->{$name} = [ $namespace, $code ]; |
293 | } |
294 | if ( my $regex = $flags{regex} ) { |
295 | push @{ $c->actions->{compiled} }, [ $regex, qr#$regex# ]; |
296 | $c->actions->{regex}->{$regex} = [ $namespace, $code ]; |
297 | } |
298 | |
299 | $c->actions->{reverse}->{"$code"} = $reverse; |
300 | } |
301 | |
302 | =item $class->setup_actions($component) |
303 | |
304 | Setup actions for a component. |
305 | |
306 | =cut |
307 | |
308 | sub setup_actions { |
309 | my ( $self, $comps ) = @_; |
310 | for my $comp (@$comps) { |
311 | $comp = ref $comp || $comp; |
312 | for my $action ( @{ $comp->_cache } ) { |
313 | my ( $code, $attrs ) = @{$action}; |
314 | my $name = ''; |
315 | no strict 'refs'; |
316 | my @cache = ( $comp, @{"$comp\::ISA"} ); |
317 | my %namespaces; |
318 | while ( my $namespace = shift @cache ) { |
319 | $namespaces{$namespace}++; |
320 | for my $isa ( @{"$comp\::ISA"} ) { |
321 | next if $namespaces{$isa}; |
322 | push @cache, $isa; |
323 | $namespaces{$isa}++; |
324 | } |
325 | } |
326 | for my $namespace ( keys %namespaces ) { |
327 | for my $sym ( values %{ $namespace . '::' } ) { |
328 | if ( *{$sym}{CODE} && *{$sym}{CODE} == $code ) { |
329 | $name = *{$sym}{NAME}; |
330 | $self->set_action( $name, $code, $comp, $attrs ); |
331 | last; |
332 | } |
333 | } |
334 | } |
335 | } |
336 | } |
1abd6db7 |
337 | my $actions = $self->actions; |
338 | my $privates = Text::ASCIITable->new; |
5fbed090 |
339 | $privates->setCols( 'Private', 'Class' ); |
340 | $privates->setColWidth( 'Private', 36, 1 ); |
341 | $privates->setColWidth( 'Class', 37, 1 ); |
1abd6db7 |
342 | my $walker = sub { |
343 | my ( $walker, $parent, $prefix ) = @_; |
344 | $prefix .= $parent->getNodeValue || ''; |
345 | $prefix .= '/' unless $prefix =~ /\/$/; |
346 | my $uid = $parent->getUID; |
347 | for my $action ( keys %{ $actions->{private}->{$uid} } ) { |
348 | my ( $class, $code ) = @{ $actions->{private}->{$uid}->{$action} }; |
d36e81fd |
349 | $privates->addRow( "$prefix$action", $class ); |
1abd6db7 |
350 | } |
351 | $walker->( $walker, $_, $prefix ) for $parent->getAllChildren; |
352 | }; |
353 | $walker->( $walker, $self->tree, '' ); |
354 | $self->log->debug( 'Loaded private actions', $privates->draw ) |
355 | if ( @{ $privates->{tbl_rows} } && $self->debug ); |
356 | my $publics = Text::ASCIITable->new; |
357 | $publics->setCols( 'Public', 'Private' ); |
699e1247 |
358 | $publics->setColWidth( 'Public', 36, 1 ); |
359 | $publics->setColWidth( 'Private', 37, 1 ); |
1abd6db7 |
360 | for my $plain ( sort keys %{ $actions->{plain} } ) { |
361 | my ( $class, $code ) = @{ $actions->{plain}->{$plain} }; |
7ace516e |
362 | my $reverse = $self->actions->{reverse}->{$code}; |
363 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
364 | $publics->addRow( "/$plain", $reverse ); |
1abd6db7 |
365 | } |
366 | $self->log->debug( 'Loaded public actions', $publics->draw ) |
367 | if ( @{ $publics->{tbl_rows} } && $self->debug ); |
368 | my $regexes = Text::ASCIITable->new; |
369 | $regexes->setCols( 'Regex', 'Private' ); |
699e1247 |
370 | $regexes->setColWidth( 'Regex', 36, 1 ); |
371 | $regexes->setColWidth( 'Private', 37, 1 ); |
1abd6db7 |
372 | for my $regex ( sort keys %{ $actions->{regex} } ) { |
373 | my ( $class, $code ) = @{ $actions->{regex}->{$regex} }; |
7ace516e |
374 | my $reverse = $self->actions->{reverse}->{$code}; |
375 | $reverse = $reverse ? "/$reverse" : $code; |
cd677e12 |
376 | $regexes->addRow( $regex, $reverse ); |
1abd6db7 |
377 | } |
378 | $self->log->debug( 'Loaded regex actions', $regexes->draw ) |
379 | if ( @{ $regexes->{tbl_rows} } && $self->debug ); |
380 | } |
381 | |
382 | sub _prefix { |
383 | my ( $class, $name ) = @_; |
384 | my $prefix = _class2prefix($class); |
385 | $name = "$prefix/$name" if $prefix; |
386 | return $name; |
387 | } |
388 | |
389 | sub _class2prefix { |
390 | my $class = shift || ''; |
391 | my $prefix; |
392 | if ( $class =~ /^.*::([MVC]|Model|View|Controller)?::(.*)$/ ) { |
393 | $prefix = lc $2; |
394 | $prefix =~ s/\:\:/\//g; |
395 | } |
396 | return $prefix; |
397 | } |
398 | |
399 | =back |
400 | |
401 | =head1 AUTHOR |
402 | |
403 | Sebastian Riedel, C<sri@cpan.org> |
404 | |
405 | =head1 COPYRIGHT |
406 | |
407 | This program is free software, you can redistribute it and/or modify it under |
408 | the same terms as Perl itself. |
409 | |
410 | =cut |
411 | |
412 | 1; |