1 package SL::Controller::Base;
5 use parent qw(Rose::Object);
9 use List::Util qw(first);
10 use SL::Request qw(flatten);
11 use SL::MoreCommon qw(uri_encode);
14 use Rose::Object::MakeMethods::Generic
16 scalar => [ qw(action_name) ],
20 # public/helper functions
26 return $_[0] if (scalar(@_) == 1) && !ref($_[0]);
28 my %params = ref($_[0]) eq 'HASH' ? %{ $_[0] } : @_;
29 my $controller = delete($params{controller}) || $self->controller_name;
30 my $action = $params{action} || 'dispatch';
33 if ($controller =~ m/\.pl$/) {
34 # Old-style controller
35 $script = $controller;
37 $params{action} = "${controller}/${action}";
38 $script = "controller.pl";
41 my $query = join '&', map { uri_encode($_->[0]) . '=' . uri_encode($_->[1]) } @{ flatten(\%params) };
43 return "${script}?${query}";
48 my $url = $self->url_for(@_);
50 if ($self->delay_flash_on_redirect) {
51 require SL::Helper::Flash;
52 SL::Helper::Flash::delay_flash();
55 return $self->render(SL::ClientJS->new->redirect_to($self->url_for(@_))) if $::request->is_ajax;
57 print $::request->{cgi}->redirect($url);
63 my ($options, %locals) = (@_ && ref($_[0])) ? @_ : ({ }, @_);
65 # Special handling/shortcut for an instance of SL::ClientJS:
66 return $self->render(\$template->to_json, { type => 'json' }) if ref($template) eq 'SL::ClientJS';
68 # Set defaults for all available options.
76 $options->{$_} //= $defaults{$_} for keys %defaults;
77 $options->{type} = lc $options->{type};
79 # Check supplied options for validity.
80 foreach (keys %{ $options }) {
81 croak "Unsupported option: $_" unless $defaults{$_};
84 # Only certain types are supported.
85 croak "Unsupported type: " . $options->{type} unless $options->{type} =~ m/^(?:html|js|json|text)$/;
87 # The "template" argument must be a string or a reference to one.
88 $template = ${ $template } if ((ref($template) || '') eq 'REF') && (ref(${ $template }) eq 'SL::Presenter::EscapedText');
89 croak "Unsupported 'template' reference type: " . ref($template) if ref($template) && (ref($template) !~ m/^(?:SCALAR|SL::Presenter::EscapedText)$/);
91 # If all output is turned off then don't output the header either.
92 if (!$options->{output}) {
93 $options->{header} = 0;
94 $options->{layout} = 0;
97 # Layout only makes sense if we're outputting HTML.
98 $options->{layout} = 0 if $options->{type} ne 'html';
101 if ($options->{header}) {
102 # Output the HTTP response and the layout in case of HTML output.
104 if ($options->{layout}) {
105 $::form->{title} = $locals{title} if $locals{title};
109 # No layout: just the standard HTTP response. Also notify
110 # $::form that the header has already been output so that
111 # $::form->header() won't output it again.
112 $::form->{header} = 1;
113 my $content_type = $options->{type} eq 'html' ? 'text/html'
114 : $options->{type} eq 'js' ? 'text/javascript'
115 : $options->{type} eq 'text' ? 'text/plain'
116 : 'application/json';
118 print $::form->create_http_response(content_type => $content_type,
123 # Let the presenter do the rest of the work.
124 my $output = $self->presenter->render(
126 { type => $options->{type}, process => $options->{process} },
131 # Print the output if wanted.
132 print $output if $options->{output};
138 my ($self, $file_name, %params) = @_;
140 my $file = IO::File->new($file_name, 'r') || croak("Cannot open file '${file_name}'");
141 my $content_type = $params{type} || 'application/octet_stream';
142 my $attachment_name = $params{name} || $file_name;
143 $attachment_name =~ s:.*//::g;
145 print $::form->create_http_response(content_type => $content_type,
146 content_disposition => 'attachment; filename="' . $attachment_name . '"',
147 content_length => -s $file);
149 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
154 return SL::Presenter->get;
157 sub controller_name {
158 my $class = ref($_[0]) || $_[0];
159 $class =~ s/^SL::Controller:://;
164 # Before/after run hooks
168 _add_hook('before', @_);
172 _add_hook('after', @_);
178 my ($when, $class, $sub, %params) = @_;
180 foreach my $key (qw(only except)) {
181 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
184 my $idx = "${when}/${class}";
185 $hooks{$idx} ||= [ ];
186 push @{ $hooks{$idx} }, { %params, code => $sub };
190 my ($self, $when, $action) = @_;
192 my $idx = "${when}/" . ref($self);
194 foreach my $hook (@{ $hooks{$idx} || [] }) {
195 next if ($hook->{only } && !$hook->{only }->{$action})
196 || ($hook->{except} && $hook->{except}->{$action});
198 if (ref($hook->{code}) eq 'CODE') {
199 $hook->{code}->($self, $action);
201 my $sub = $hook->{code};
202 $self->$sub($action);
208 # behaviour. override these
211 sub delay_flash_on_redirect {
216 # Ignore the 'action' parameter.
220 sub keep_auth_vars_in_form {
225 # private functions -- for use in Base only
231 my $sub = "action_${action}";
233 return $self->_dispatch(@_) if $action eq 'dispatch';
235 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
237 $self->action_name($action);
238 $self->_run_hooks('before', $action);
240 $self->_run_hooks('after', $action);
247 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
248 my $action = first { $::form->{"action_${_}"} } @actions;
249 my $sub = "action_${action}";
251 if ($self->can($sub)) {
252 $self->action_name($action);
253 $self->_run_hooks('before', $action);
255 $self->_run_hooks('after', $action);
257 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
267 SL::Controller::Base - base class for all action controllers
273 This is a base class for all action controllers. Action controllers
274 provide subs that are callable by special URLs.
276 For each request made to the web server an instance of the controller
277 will be created. After the request has been served that instance will
278 handed over to garbage collection.
280 This base class is derived from L<Rose::Object>.
284 The URLs have the following properties:
290 The script part of the URL must be C<controller.pl>.
294 There must be a GET or POST parameter named C<action> containing the
295 name of the controller and the sub to call separated by C</>,
296 e.g. C<Message/list>.
300 The controller name is the package's name without the
301 C<SL::Controller::> prefix. At the moment only packages in the
302 C<SL::Controller> namespace are valid; sub-namespaces are not
303 allowed. The package name must start with an upper-case letter.
307 The sub part of the C<action> parameter is the name of the sub to
308 call. However, the sub's name is automatically prefixed with
309 C<action_>. Therefore for the example C<Message/list> the sub
310 C<SL::DB::Message::action_list> would be called. This in turn means
311 that subs whose name does not start with C<action_> cannot be invoked
312 directly via the URL.
316 =head2 INDIRECT DISPATCHING
318 In the case that there are several submit buttons on a page it is
319 often impractical to have a single C<action> parameter match up
320 properly. For such a case a special dispatcher method is available. In
321 that case the C<action> parameter of the URL must be
322 C<Controller/dispatch>.
324 The C<SL::Controller::Base::_dispatch> method will iterate over all
325 subs in the controller package whose names start with C<action_>. The
326 first one for which there's a GET or POST parameter with the same name
327 and that's trueish is called.
329 Usage from a template usually looks like this:
331 <form method="POST" action="controller.pl">
333 <input type="hidden" name="action" value="Message/dispatch">
334 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
335 <input type="submit" name="action_delete" value="Delete messages">
338 The dispatching is handled by the function L</_dispatch>.
342 Hooks are functions that are called before or after the controller's
343 action is called. The controller package defines the hooks, and those
344 hooks themselves are run as instance methods.
346 Hooks are run in the order they're added.
348 The hooks receive a single parameter: the name of the action that is
349 about to be called (for C<before> hooks) / was called (for C<after>
352 The return value of the hooks is discarded.
354 Hooks can be defined to run for all actions, for only specific actions
355 or for all actions except a list of actions. Each entry is the action
356 name, not the sub's name. Therefore in order to run a hook before one
357 of the subs C<action_edit> or C<action_save> is called the following
360 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
364 =head2 PUBLIC HELPER FUNCTIONS
366 These functions are supposed to be called by sub-classed controllers.
370 =item C<render $template, [ $options, ] %locals>
372 Renders the template C<$template>. Provides other variables than
373 C<Form::parse_html_template> does.
375 C<$options>, if present, must be a hash reference. All remaining
376 parameters are slurped into C<%locals>.
378 What is rendered and how C<$template> is interpreted is determined
379 both by C<$template>'s reference type and by the supplied options. The
380 actual rendering is handled by L<SL::Presenter/render>.
382 If C<$template> is a normal scalar (not a reference) then it is meant
383 to be a template file name relative to the C<templates/webpages>
384 directory. The file name to use is determined by the C<type> option.
386 If C<$template> is a reference to a scalar then the referenced
387 scalar's content is used as the content to process. The C<type> option
388 is not considered in this case.
390 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
391 or a reference to such an instance. Both of these cases are handled
392 the same way as if C<$template> were a reference to a scalar: its
393 content is processed, and C<type> is not considered.
395 Other reference types, unknown options and unknown arguments to the
396 C<type> option cause the function to L<croak>.
398 The following options are available (defaults: C<type> = 'html',
399 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
405 The template type. Can be C<html> (the default), C<js> for JavaScript,
406 C<json> for JSON and C<text> for plain text content. Affects the
407 extension that's added to the file name given with a non-reference
408 C<$template> argument, the content type HTTP header that is output and
409 whether or not the layout will be output as well (see description of
414 If trueish (which is also the default) it causes the template/content
415 to be processed by the Template toolkit. Otherwise the
416 template/content is output as-is.
420 If trueish (the default) then the generated output will be sent to the
421 browser in addition to being returned. If falsish then the options
422 C<header> and C<layout> are set to 0 as well.
426 Determines whether or not to output the HTTP response
427 headers. Defaults to the same value that C<output> is set to. If set
428 to falsish then the layout is not output either.
432 Determines whether or not the basic HTML layout structure should be
433 output (HTML header, common JavaScript and stylesheet inclusions, menu
434 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
435 C<header> is set to otherwise.
439 The template itself has access to several variables. These are listed
440 in the documentation to L<SL::Presenter/render>.
442 The function will always return the output.
444 Example: Render a HTML template with a certain title and a few locals
446 $self->render('todo/list',
447 title => 'List TODO items',
448 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
450 Example: Render a string and return its content for further processing
451 by the calling function. No header is generated due to C<output>.
453 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
456 Example: Render a JavaScript template
457 "templates/webpages/todo/single_item.js" and send it to the
458 browser. Typical use for actions called via AJAX:
460 $self->render('todo/single_item', { type => 'js' },
461 item => $employee->most_important_todo_item);
463 =item C<send_file $file_name, [%params]>
465 Sends the file C<$file_name> to the browser including appropriate HTTP
466 headers for a download. C<%params> can include the following:
470 =item * C<type> -- the file's content type; defaults to
471 'application/octet_stream'
473 =item * C<name> -- the name presented to the browser; defaults to
478 =item C<url_for $url>
480 =item C<url_for $params>
482 =item C<url_for %params>
484 Creates an URL for the given parameters suitable for calling an action
485 controller. If there's only one scalar parameter then it is returned
488 Otherwise the parameters are given either as a single hash ref
489 parameter or as a normal hash.
491 The controller to call is given by C<$params{controller}>. It defaults
492 to the current controller as returned by
495 The action to call is given by C<$params{action}>. It defaults to
498 All other key/value pairs in C<%params> are appended as GET parameters
501 Usage from a template might look like this:
503 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
505 =item C<redirect_to %url_params>
507 Redirects the browser to a new URL. The URL is generated by calling
508 L</url_for> with C<%url_params>.
510 This function implements the redirection depending on whether or not
511 the current request is an AJAX request as determined by
512 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
513 standard HTTP redirect header (HTTP code 302). If it is an AJAX
514 request then it outputs an AJAX response suitable for the
515 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
517 =item C<run_before $sub, %params>
519 =item C<run_after $sub, %params>
521 Adds a hook to run before or after certain actions are run for the
522 current package. The code to run is C<$sub> which is either the name
523 of an instance method or a code reference. If it's the latter then the
524 first parameter will be C<$self>.
526 C<%params> can contain two possible values that restrict the code to
527 be run only for certain actions:
531 =item C<< only => \@list >>
533 Only run the code for actions given in C<@list>. The entries are the
534 action names, not the names of the sub (so it's C<list> instead of
537 =item C<< except => \@list >>
539 Run the code for all actions but for those given in C<@list>. The
540 entries are the action names, not the names of the sub (so it's
541 C<list> instead of C<action_list>).
545 If neither restriction is used then the code will be run for any
548 The hook's return values are discarded.
550 =item C<delay_flash_on_redirect>
552 May be overridden by a controller. If this method returns true, redirect_to
553 will delay all flash messages for the current request. Defaults to false for
554 compatibility reasons.
556 =item C<get_auth_level $action>
558 May be overridden by a controller. Determines what kind of
559 authentication is required for a particular action. Must return either
560 C<admin> (which means that authentication as an admin is required),
561 C<user> (authentication as a normal user suffices) with a possible
562 future value C<none> (which would require no authentication but is not
565 =item C<keep_auth_vars_in_form %params>
567 May be overridden by a controller. If falsish (the default) all form
568 variables whose name starts with C<{AUTH}> are removed before the
569 request is routed. Only controllers that handle login requests
570 themselves should return trueish for this function.
572 C<$params{action}> contains the action name that the request will be
575 =item C<controller_name>
577 Returns the name of the curernt controller package without the
578 C<SL::Controller::> prefix. This method can be called both as a class
579 method and an instance method.
583 Returns the name of the currently executing action. If the dispatcher
584 mechanism was used then this is not C<dispatch> but the actual method
585 name the dispatching resolved to.
589 Returns the global presenter object by calling
590 L<SL::Presenter/get>.
594 =head2 PRIVATE FUNCTIONS
596 These functions are supposed to be used from this base class only.
602 Implements the method lookup for indirect dispatching mentioned in the
603 section L</INDIRECT DISPATCHING>.
605 =item C<_run_action $action>
607 Executes a sub based on the value of C<$action>. C<$action> is the sub
608 name part of the C<action> GET or POST parameter as described in
611 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
612 base class is called for L</INDIRECT DISPATCHING>. Otherwise
613 C<$action> is prefixed with C<action_>, and that sub is called on the
614 current controller instance.
620 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>