1 package SL::Controller::Base;
5 use parent qw(Rose::Object);
8 use List::Util qw(first);
11 # public/helper functions
17 return $_[0] if (scalar(@_) == 1) && !ref($_[0]);
19 my %params = ref($_[0]) eq 'HASH' ? %{ $_[0] } : @_;
20 my $controller = delete($params{controller}) || $self->_controller_name;
21 my $action = delete($params{action}) || 'dispatch';
22 $params{action} = "${controller}/${action}";
23 my $query = join('&', map { $::form->escape($_) . '=' . $::form->escape($params{$_}) } keys %params);
25 return "controller.pl?${query}";
30 my $url = $self->url_for(@_);
32 print $::cgi->redirect($url);
38 my ($options, %locals) = (@_ && ref($_[0])) ? @_ : ({ }, @_);
40 $options->{type} = lc($options->{type} || 'html');
41 $options->{no_layout} = 1 if $options->{type} eq 'js';
44 if ($options->{inline}) {
48 $source = "templates/webpages/${template}." . $options->{type};
49 croak "Template file ${source} not found" unless -f $source;
52 if (!$options->{partial} && !$options->{inline} && !$::form->{header}) {
53 if ($options->{no_layout}) {
54 $::form->{header} = 1;
55 my $content_type = $options->{type} eq 'js' ? 'text/javascript' : 'text/html';
57 print $::form->create_http_response(content_type => $content_type,
58 charset => $::dbcharset || Common::DEFAULT_CHARSET());
61 $::form->{title} = $locals{title} if $locals{title};
66 my %params = ( %locals,
70 LXCONFIG => { dbcharset => $::dbcharset,
72 lizenzen => $::lizenzen,
73 latex_templates => $::latex,
74 opendocument_templates => $::opendocument_templates,
75 vertreter => $::vertreter,
76 show_best_before => $::show_best_before,
78 LXDEBUG => $::lxdebug,
79 MYCONFIG => \%::myconfig,
84 my $parser = $self->_template_obj;
85 $parser->process($source, \%params, \$output) || croak $parser->error;
87 print $output unless $options->{inline} || $options->{no_output};
93 # Before/after run hooks
97 _add_hook('before', @_);
101 _add_hook('after', @_);
107 my ($when, $class, $sub, %params) = @_;
109 foreach my $key (qw(only except)) {
110 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
113 my $idx = "${when}/${class}";
114 $hooks{$idx} ||= [ ];
115 push @{ $hooks{$idx} }, { %params, code => $sub };
119 my ($self, $when, $action) = @_;
121 my $idx = "${when}/" . ref($self);
123 foreach my $hook (@{ $hooks{$idx} || [] }) {
124 next if ($hook->{only } && !$hook->{only }->{$action})
125 || ($hook->{except} && $hook->{except}->{$action});
127 if (ref($hook->{code}) eq 'CODE') {
128 $hook->{code}->($self);
130 my $sub = $hook->{code};
137 # private functions -- for use in Base only
143 my $sub = "action_${action}";
145 return $self->_dispatch(@_) if $action eq 'dispatch';
147 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
149 $self->_run_hooks('before', $action);
151 $self->_run_hooks('after', $action);
154 sub _controller_name {
155 return (split(/::/, ref($_[0])))[-1];
162 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
163 my $action = first { $::form->{"action_${_}"} } @actions;
164 my $sub = "action_${action}";
166 $self->_run_hooks('before', $action);
168 $self->_run_hooks('after', $action);
174 $self->{__basepriv_template_obj} ||=
175 Template->new({ INTERPOLATE => 0,
179 PLUGIN_BASE => 'SL::Template::Plugin',
180 INCLUDE_PATH => '.:templates/webpages',
181 COMPILE_EXT => '.tcc',
182 COMPILE_DIR => $::userspath . '/templates-cache',
185 return $self->{__basepriv_template_obj};
194 SL::Controller::Base - base class for all action controllers
200 This is a base class for all action controllers. Action controllers
201 provide subs that are callable by special URLs.
203 For each request made to the web server an instance of the controller
204 will be created. After the request has been served that instance will
205 handed over to garbage collection.
207 This base class is derived from L<Rose::Object>.
211 The URLs have the following properties:
217 The script part of the URL must be C<controller.pl>.
221 There must be a GET or POST parameter named C<action> containing the
222 name of the controller and the sub to call separated by C</>,
223 e.g. C<Message/list>.
227 The controller name is the package's name without the
228 C<SL::Controller::> prefix. At the moment only packages in the
229 C<SL::Controller> namespace are valid; sub-namespaces are not
230 allowed. The package name must start with an upper-case letter.
234 The sub part of the C<action> parameter is the name of the sub to
235 call. However, the sub's name is automatically prefixed with
236 C<action_>. Therefore for the example C<Message/list> the sub
237 C<SL::DB::Message::action_list> would be called. This in turn means
238 that subs whose name does not start with C<action_> cannot be invoked
239 directly via the URL.
243 =head2 INDIRECT DISPATCHING
245 In the case that there are several submit buttons on a page it is
246 often impractical to have a single C<action> parameter match up
247 properly. For such a case a special dispatcher method is available. In
248 that case the C<action> parameter of the URL must be
249 C<Controller/dispatch>.
251 The C<SL::Controller::Base::_dispatch> method will iterate over all
252 subs in the controller package whose names start with C<action_>. The
253 first one for which there's a GET or POST parameter with the same name
254 and that's trueish is called.
256 Usage from a template usually looks like this:
258 <form method="POST" action="controller.pl">
260 <input type="hidden" name="action" value="Message/dispatch">
261 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
262 <input type="submit" name="action_delete" value="Delete messages">
265 The dispatching is handled by the function L</_dispatch>.
269 Hooks are functions that are called before or after the controller's
270 action is called. The controller package defines the hooks, and those
271 hooks themselves are run as instance methods.
273 Hooks are run in the order they're added.
275 The return value of the hooks is discarded.
277 Hooks can be defined to run for all actions, for only specific actions
278 or for all actions except a list of actions. Each entry is the action
279 name, not the sub's name. Therefore in order to run a hook before one
280 of the subs C<action_edit> or C<action_save> is called the following
283 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
287 =head2 PUBLIC HELPER FUNCTIONS
289 These functions are supposed to be called by sub-classed controllers.
293 =item C<render $template, [ $options, ] %locals>
295 Renders the template C<$template>. Provides other variables than
296 C<Form::parse_html_template> does.
298 C<$options>, if present, must be a hash reference. All remaining
299 parameters are slurped into C<%locals>.
301 What is rendered and how C<$template> is interpreted is determined by
302 the options I<type>, I<inline>, I<partial> and I<no_layout>.
304 If C<< $options->{inline} >> is trueish then C<$template> is a string
305 containing the template code to interprete. Additionally the output
306 will not be sent to the browser. Instead it is only returned to the
309 If C<< $options->{inline} >> is falsish then C<$template> is
310 interpreted as the name of a template file. It is prefixed with
311 "templates/webpages/" and postfixed with a file extension based on
312 C<< $options->{type} >>. C<< $options->{type} >> can be either C<html>
313 or C<js> and defaults to C<html>. An exception will be thrown if that
316 If C<< $options->{partial} >> or C<< $options->{inline} >> is trueish
317 then neither the HTTP response header nor the standard HTML header is
320 Otherwise at least the HTTP response header will be generated based on
321 the template type (C<< $options->{type} >>).
323 If the template type is C<html> then the standard HTML header will be
324 output via C<< $::form->header >> with C<< $::form->{title} >> set to
325 C<$locals{title}> (the latter only if C<$locals{title}> is
326 trueish). Setting C<< $options->{no_layout} >> to trueish will prevent
329 The template itself has access to the following variables:
333 =item * C<AUTH> -- C<$::auth>
335 =item * C<FORM> -- C<$::form>
337 =item * C<LOCALE> -- C<$::locale>
339 =item * C<LXCONFIG> -- all parameters from C<config/lx-erp.conf> with
340 the same name they appear in the file (e.g. C<dbcharset>, C<webdav>
343 =item * C<LXDEBUG> -- C<$::lxdebug>
345 =item * C<MYCONFIG> -- C<%::myconfig>
347 =item * C<SELF> -- the controller instance
349 =item * All items from C<%locals>
353 Unless C<< $options->{inline} >> is trueish the function will send the
354 output to the browser.
356 The function will always return the output.
358 Example: Render a HTML template with a certain title and a few locals
360 $self->render('todo/list',
361 title => 'List TODO items',
362 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
364 Example: Render a string and return its content for further processing
365 by the calling function. No header is generated due to C<inline>.
367 my $content = $self->render('[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
368 { type => 'js', inline => 1 });
370 Example: Render a JavaScript template and send it to the
371 browser. Typical use for actions called via AJAX:
373 $self->render('todo/single_item', { type => 'js' },
374 item => $employee->most_important_todo_item);
376 =item C<url_for $url>
378 =item C<url_for $params>
380 =item C<url_for %params>
382 Creates an URL for the given parameters suitable for calling an action
383 controller. If there's only one scalar parameter then it is returned
386 Otherwise the parameters are given either as a single hash ref
387 parameter or as a normal hash.
389 The controller to call is given by C<$params{controller}>. It defaults
390 to the current controller as returned by
391 L</_controller_name>.
393 The action to call is given by C<$params{action}>. It defaults to
396 All other key/value pairs in C<%params> are appended as GET parameters
399 Usage from a template might look like this:
401 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
403 =item C<redirect_to %url_params>
405 Redirects the browser to a new URL by outputting a HTTP redirect
406 header. The URL is generated by calling L</url_for> with
409 =item C<run_before $sub, %params>
411 =item C<run_after $sub, %params>
413 Adds a hook to run before or after certain actions are run for the
414 current package. The code to run is C<$sub> which is either the name
415 of an instance method or a code reference. If it's the latter then the
416 first parameter will be C<$self>.
418 C<%params> can contain two possible values that restrict the code to
419 be run only for certain actions:
423 =item C<< only => \@list >>
425 Only run the code for actions given in C<@list>. The entries are the
426 action names, not the names of the sub (so it's C<list> instead of
429 =item C<< except => \@list >>
431 Run the code for all actions but for those given in C<@list>. The
432 entries are the action names, not the names of the sub (so it's
433 C<list> instead of C<action_list>).
437 If neither restriction is used then the code will be run for any
440 The hook's return values are discarded.
444 =head2 PRIVATE FUNCTIONS
446 These functions are supposed to be used from this base class only.
450 =item C<_controller_name>
452 Returns the name of the curernt controller package without the
453 C<SL::Controller::> prefix.
457 Implements the method lookup for indirect dispatching mentioned in the
458 section L</INDIRECT DISPATCHING>.
460 =item C<_run_action $action>
462 Executes a sub based on the value of C<$action>. C<$action> is the sub
463 name part of the C<action> GET or POST parameter as described in
466 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
467 base class is called for L</INDIRECT DISPATCHING>. Otherwise
468 C<$action> is prefixed with C<action_>, and that sub is called on the
469 current controller instance.
475 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>