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])) ? @_ : ({ }, @_);
41 if ($options->{inline}) {
45 $source = "templates/webpages/${template}.html";
46 croak "Template file ${source} not found" unless -f $source;
49 if (!$options->{partial} && !$options->{inline}) {
50 $::form->{title} = $locals{title} if $locals{title};
54 my %params = ( %locals,
58 LXCONFIG => { dbcharset => $::dbcharset,
60 lizenzen => $::lizenzen,
61 latex_templates => $::latex,
62 opendocument_templates => $::opendocument_templates,
63 vertreter => $::vertreter,
64 show_best_before => $::show_best_before,
66 LXDEBUG => $::lxdebug,
67 MYCONFIG => \%::myconfig,
72 my $parser = $self->_template_obj;
73 $parser->process($source, \%params, \$output) || croak $parser->error;
75 print $output unless $options->{inline};
81 # private functions -- for use in Base only
86 my $action = "action_" . shift;
88 return $self->_dispatch(@_) if $action eq 'action_dispatch';
90 $::form->error("Invalid action ${action} for controller " . ref($self)) if !$self->can($action);
94 sub _controller_name {
95 return (split(/::/, ref($_[0])))[-1];
101 my @actions = grep { m/^action_/ } keys %{ ref($self) . "::" };
102 my $action = first { $::form->{$_} } @actions;
110 $self->{__basepriv_template_obj} ||=
111 Template->new({ INTERPOLATE => 0,
115 PLUGIN_BASE => 'SL::Template::Plugin',
116 INCLUDE_PATH => '.:templates/webpages',
117 COMPILE_EXT => '.tcc',
118 COMPILE_DIR => $::userspath . '/templates-cache',
121 return $self->{__basepriv_template_obj};
130 SL::Controller::Base - base class for all action controllers
136 This is a base class for all action controllers. Action controllers
137 provide subs that are callable by special URLs.
139 For each request made to the web server an instance of the controller
140 will be created. After the request has been served that instance will
141 handed over to garbage collection.
143 This base class is derived from L<Rose::Object>.
147 The URLs have the following properties:
153 The script part of the URL must be C<controller.pl>.
157 There must be a GET or POST parameter named C<action> containing the
158 name of the controller and the sub to call separated by C</>,
159 e.g. C<Message/list>.
163 The controller name is the package's name without the
164 C<SL::Controller::> prefix. At the moment only packages in the
165 C<SL::Controller> namespace are valid; sub-namespaces are not
166 allowed. The package name must start with an upper-case letter.
170 The sub part of the C<action> parameter is the name of the sub to
171 call. However, the sub's name is automatically prefixed with
172 C<action_>. Therefore for the example C<Message/list> the sub
173 C<SL::DB::Message::action_list> would be called. This in turn means
174 that subs whose name does not start with C<action_> cannot be invoked
175 directly via the URL.
179 =head2 INDIRECT DISPATCHING
181 In the case that there are several submit buttons on a page it is
182 often impractical to have a single C<action> parameter match up
183 properly. For such a case a special dispatcher method is available. In
184 that case the C<action> parameter of the URL must be
185 C<Controller/dispatch>.
187 The C<SL::Controller::Base::_dispatch> method will iterate over all
188 subs in the controller package whose names start with C<action_>. The
189 first one for which there's a GET or POST parameter with the same name
190 and that's trueish is called.
192 Usage from a template usually looks like this:
194 <form method="POST" action="controller.pl">
196 <input type="hidden" name="action" value="Message/dispatch">
197 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
198 <input type="submit" name="action_delete" value="Delete messages">
201 The dispatching is handled by the function L</_dispatch>.
205 =head2 PUBLIC HELPER FUNCTIONS
207 These functions are supposed to be called by sub-classed controllers.
211 =item C<render $template, [ $options, ] %locals>
213 Renders the template C<$template>. Provides other variables than
214 C<Form::parse_html_template> does.
216 C<$options>, if present, must be a hash reference. All remaining
217 parameters are slurped into C<%locals>.
219 What is rendered and how C<$template> is interpreted is determined by
220 C<< $options->{inline} >> and C<< $options->{partial} >>.
222 If C<< $options->{inline} >> is trueish then C<$template> is a string
223 containing the template code to interprete. Additionally the output
224 will not be sent to the browser. Instead it is only returned to the
227 If C<< $options->{inline} >> is falsish then C<$template> is
228 interpreted as the name of a template file. It is prefixed with
229 "templates/webpages/" and postfixed with ".html". An exception will be
230 thrown if that file does not exist.
232 If C<< $options->{partial} >> or C<< $options->{inline} }} is trueish
233 then C<< $::form->header >> will not be called. Otherwise
234 C<< $::form->{header} >> will be set to C<$locals{header}> (only if
235 $locals{header} is trueish) and C<< $::form->header >> will be called
236 before the template itself is processed.
238 The template itself has access to the following variables:
242 =item * C<AUTH> -- C<$::auth>
244 =item * C<FORM> -- C<$::form>
246 =item * C<LOCALE> -- C<$::locale>
248 =item * C<LXCONFIG> -- all parameters from C<config/lx-erp.conf> with
249 the same name they appear in the file (e.g. C<dbcharset>, C<webdav>
252 =item * C<LXDEBUG> -- C<$::lxdebug>
254 =item * C<MYCONFIG> -- C<%::myconfig>
256 =item * C<SELF> -- the controller instance
258 =item * All items from C<%locals>
262 Unless C<< $options->{inline} >> is trueish the function will send the
263 output to the browser.
265 The function will always return the output.
267 =item C<url_for $url>
269 =item C<url_for $params>
271 =item C<url_for %params>
273 Creates an URL for the given parameters suitable for calling an action
274 controller. If there's only one scalar parameter then it is returned
277 Otherwise the parameters are given either as a single hash ref
278 parameter or as a normal hash.
280 The controller to call is given by C<$params{controller}>. It defaults
281 to the current controller as returned by
282 L</_controller_name>.
284 The action to call is given by C<$params{action}>. It defaults to
287 All other key/value pairs in C<%params> are appended as GET parameters
290 Usage from a template might look like this:
292 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
294 =item redirect_to %url_params
296 Redirects the browser to a new URL by outputting a HTTP redirect
297 header. The URL is generated by calling L</url_for> with
302 =head2 PRIVATE FUNCTIONS
304 These functions are supposed to be used from this base class only.
308 =item C<_controller_name>
310 Returns the name of the curernt controller package without the
311 C<SL::Controller::> prefix.
315 Implements the method lookup for indirect dispatching mentioned in the
316 section L</INDIRECT DISPATCHING>.
318 =item C<_run_action $action>
320 Executes a sub based on the value of C<$action>. C<$action> is the sub
321 name part of the C<action> GET or POST parameter as described in
324 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
325 base class is called for L</INDIRECT DISPATCHING>. Otherwise
326 C<$action> is prefixed with C<action_>, and that sub is called on the
327 current controller instance.
333 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>