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 # Let the presenter do the rest of the work.
104 local $::form->{title} = $locals{title} if $locals{title};
105 $output = $self->presenter->render(
107 { type => $options->{type}, process => $options->{process} },
113 if ($options->{header}) {
114 # Output the HTTP response and the layout in case of HTML output.
116 if ($options->{layout}) {
117 $::form->{title} = $locals{title} if $locals{title};
121 # No layout: just the standard HTTP response. Also notify
122 # $::form that the header has already been output so that
123 # $::form->header() won't output it again.
124 $::form->{header} = 1;
125 my $content_type = $options->{type} eq 'html' ? 'text/html'
126 : $options->{type} eq 'js' ? 'text/javascript'
127 : $options->{type} eq 'text' ? 'text/plain'
128 : 'application/json';
130 print $::form->create_http_response(content_type => $content_type,
135 # Print the output if wanted.
136 print $output if $options->{output};
142 my ($self, $file_name_or_content, %params) = @_;
146 if (!ref $file_name_or_content) {
147 $file = IO::File->new($file_name_or_content, 'r') || croak("Cannot open file '${file_name_or_content}'");
148 $size = -s $file_name_or_content;
150 $size = length $$file_name_or_content;
153 my $content_type = $params{type} || 'application/octet_stream';
154 my $attachment_name = $params{name} || (!ref($file_name_or_content) ? $file_name_or_content : '');
155 $attachment_name =~ s:.*//::g;
157 print $::form->create_http_response(content_type => $content_type,
158 content_disposition => 'attachment; filename="' . $attachment_name . '"',
159 content_length => $size);
161 if (!ref $file_name_or_content) {
162 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
164 unlink $file_name_or_content if $params{unlink};
166 $::locale->with_raw_io(\*STDOUT, sub { print $$file_name_or_content });
171 return SL::Presenter->get;
174 sub controller_name {
175 my $class = ref($_[0]) || $_[0];
176 $class =~ s/^SL::Controller:://;
181 # Before/after run hooks
185 _add_hook('before', @_);
189 _add_hook('after', @_);
195 my ($when, $class, $sub, %params) = @_;
197 foreach my $key (qw(only except)) {
198 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
201 my $idx = "${when}/${class}";
202 $hooks{$idx} ||= [ ];
203 push @{ $hooks{$idx} }, { %params, code => $sub };
207 my ($self, $when, $action) = @_;
209 my $idx = "${when}/" . ref($self);
211 foreach my $hook (@{ $hooks{$idx} || [] }) {
212 next if ($hook->{only } && !$hook->{only }->{$action})
213 || ($hook->{except} && $hook->{except}->{$action});
215 if (ref($hook->{code}) eq 'CODE') {
216 $hook->{code}->($self, $action);
218 my $sub = $hook->{code};
219 $self->$sub($action);
225 # behaviour. override these
228 sub delay_flash_on_redirect {
233 # Ignore the 'action' parameter.
237 sub keep_auth_vars_in_form {
242 # private functions -- for use in Base only
248 my $sub = "action_${action}";
250 return $self->_dispatch(@_) if $action eq 'dispatch';
252 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
254 $self->action_name($action);
255 $self->_run_hooks('before', $action);
257 $self->_run_hooks('after', $action);
264 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
265 my $action = first { $::form->{"action_${_}"} } @actions;
266 my $sub = "action_${action}";
268 if ($self->can($sub)) {
269 $self->action_name($action);
270 $self->_run_hooks('before', $action);
272 $self->_run_hooks('after', $action);
274 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
284 SL::Controller::Base - base class for all action controllers
290 This is a base class for all action controllers. Action controllers
291 provide subs that are callable by special URLs.
293 For each request made to the web server an instance of the controller
294 will be created. After the request has been served that instance will
295 handed over to garbage collection.
297 This base class is derived from L<Rose::Object>.
301 The URLs have the following properties:
307 The script part of the URL must be C<controller.pl>.
311 There must be a GET or POST parameter named C<action> containing the
312 name of the controller and the sub to call separated by C</>,
313 e.g. C<Message/list>.
317 The controller name is the package's name without the
318 C<SL::Controller::> prefix. At the moment only packages in the
319 C<SL::Controller> namespace are valid; sub-namespaces are not
320 allowed. The package name must start with an upper-case letter.
324 The sub part of the C<action> parameter is the name of the sub to
325 call. However, the sub's name is automatically prefixed with
326 C<action_>. Therefore for the example C<Message/list> the sub
327 C<SL::DB::Message::action_list> would be called. This in turn means
328 that subs whose name does not start with C<action_> cannot be invoked
329 directly via the URL.
333 =head2 INDIRECT DISPATCHING
335 In the case that there are several submit buttons on a page it is
336 often impractical to have a single C<action> parameter match up
337 properly. For such a case a special dispatcher method is available. In
338 that case the C<action> parameter of the URL must be
339 C<Controller/dispatch>.
341 The C<SL::Controller::Base::_dispatch> method will iterate over all
342 subs in the controller package whose names start with C<action_>. The
343 first one for which there's a GET or POST parameter with the same name
344 and that's trueish is called.
346 Usage from a template usually looks like this:
348 <form method="POST" action="controller.pl">
350 <input type="hidden" name="action" value="Message/dispatch">
351 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
352 <input type="submit" name="action_delete" value="Delete messages">
355 The dispatching is handled by the function L</_dispatch>.
359 Hooks are functions that are called before or after the controller's
360 action is called. The controller package defines the hooks, and those
361 hooks themselves are run as instance methods.
363 Hooks are run in the order they're added.
365 The hooks receive a single parameter: the name of the action that is
366 about to be called (for C<before> hooks) / was called (for C<after>
369 The return value of the hooks is discarded.
371 Hooks can be defined to run for all actions, for only specific actions
372 or for all actions except a list of actions. Each entry is the action
373 name, not the sub's name. Therefore in order to run a hook before one
374 of the subs C<action_edit> or C<action_save> is called the following
377 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
381 =head2 PUBLIC HELPER FUNCTIONS
383 These functions are supposed to be called by sub-classed controllers.
387 =item C<render $template, [ $options, ] %locals>
389 Renders the template C<$template>. Provides other variables than
390 C<Form::parse_html_template> does.
392 C<$options>, if present, must be a hash reference. All remaining
393 parameters are slurped into C<%locals>.
395 What is rendered and how C<$template> is interpreted is determined
396 both by C<$template>'s reference type and by the supplied options. The
397 actual rendering is handled by L<SL::Presenter/render>.
399 If C<$template> is a normal scalar (not a reference) then it is meant
400 to be a template file name relative to the C<templates/webpages>
401 directory. The file name to use is determined by the C<type> option.
403 If C<$template> is a reference to a scalar then the referenced
404 scalar's content is used as the content to process. The C<type> option
405 is not considered in this case.
407 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
408 or a reference to such an instance. Both of these cases are handled
409 the same way as if C<$template> were a reference to a scalar: its
410 content is processed, and C<type> is not considered.
412 Other reference types, unknown options and unknown arguments to the
413 C<type> option cause the function to L<croak>.
415 The following options are available (defaults: C<type> = 'html',
416 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
422 The template type. Can be C<html> (the default), C<js> for JavaScript,
423 C<json> for JSON and C<text> for plain text content. Affects the
424 extension that's added to the file name given with a non-reference
425 C<$template> argument, the content type HTTP header that is output and
426 whether or not the layout will be output as well (see description of
431 If trueish (which is also the default) it causes the template/content
432 to be processed by the Template toolkit. Otherwise the
433 template/content is output as-is.
437 If trueish (the default) then the generated output will be sent to the
438 browser in addition to being returned. If falsish then the options
439 C<header> and C<layout> are set to 0 as well.
443 Determines whether or not to output the HTTP response
444 headers. Defaults to the same value that C<output> is set to. If set
445 to falsish then the layout is not output either.
449 Determines whether or not the basic HTML layout structure should be
450 output (HTML header, common JavaScript and stylesheet inclusions, menu
451 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
452 C<header> is set to otherwise.
456 The template itself has access to several variables. These are listed
457 in the documentation to L<SL::Presenter/render>.
459 The function will always return the output.
461 Example: Render a HTML template with a certain title and a few locals
463 $self->render('todo/list',
464 title => 'List TODO items',
465 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
467 Example: Render a string and return its content for further processing
468 by the calling function. No header is generated due to C<output>.
470 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
473 Example: Render a JavaScript template
474 "templates/webpages/todo/single_item.js" and send it to the
475 browser. Typical use for actions called via AJAX:
477 $self->render('todo/single_item', { type => 'js' },
478 item => $employee->most_important_todo_item);
480 =item C<send_file $file_name_or_content, [%params]>
482 Sends the file C<$file_name_or_content> to the browser including
483 appropriate HTTP headers for a download. If C<$file_name_or_content>
484 is a scalar then it is interpreted as a file name which is opened and
485 whose content is sent. Otherwise (C<$file_name_or_content> being a
486 reference) the referenced scalar's data itself is sent.
488 C<%params> can include the following:
492 =item * C<type> -- the file's content type; defaults to
493 'application/octet_stream'
495 =item * C<name> -- the name presented to the browser; defaults to
496 C<$file_name>; mandatory if C<$file_name_or_content> is a reference
498 =item * C<unlink> -- if trueish and C<$file_name_or_content> refers to
499 a file name then unlink the file after it has been sent to the browser
500 (e.g. for temporary files)
504 =item C<url_for $url>
506 =item C<url_for $params>
508 =item C<url_for %params>
510 Creates an URL for the given parameters suitable for calling an action
511 controller. If there's only one scalar parameter then it is returned
514 Otherwise the parameters are given either as a single hash ref
515 parameter or as a normal hash.
517 The controller to call is given by C<$params{controller}>. It defaults
518 to the current controller as returned by
521 The action to call is given by C<$params{action}>. It defaults to
524 All other key/value pairs in C<%params> are appended as GET parameters
527 Usage from a template might look like this:
529 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
531 =item C<redirect_to %url_params>
533 Redirects the browser to a new URL. The URL is generated by calling
534 L</url_for> with C<%url_params>.
536 This function implements the redirection depending on whether or not
537 the current request is an AJAX request as determined by
538 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
539 standard HTTP redirect header (HTTP code 302). If it is an AJAX
540 request then it outputs an AJAX response suitable for the
541 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
543 =item C<run_before $sub, %params>
545 =item C<run_after $sub, %params>
547 Adds a hook to run before or after certain actions are run for the
548 current package. The code to run is C<$sub> which is either the name
549 of an instance method or a code reference. If it's the latter then the
550 first parameter will be C<$self>.
552 C<%params> can contain two possible values that restrict the code to
553 be run only for certain actions:
557 =item C<< only => \@list >>
559 Only run the code for actions given in C<@list>. The entries are the
560 action names, not the names of the sub (so it's C<list> instead of
563 =item C<< except => \@list >>
565 Run the code for all actions but for those given in C<@list>. The
566 entries are the action names, not the names of the sub (so it's
567 C<list> instead of C<action_list>).
571 If neither restriction is used then the code will be run for any
574 The hook's return values are discarded.
576 =item C<delay_flash_on_redirect>
578 May be overridden by a controller. If this method returns true, redirect_to
579 will delay all flash messages for the current request. Defaults to false for
580 compatibility reasons.
582 =item C<get_auth_level $action>
584 May be overridden by a controller. Determines what kind of
585 authentication is required for a particular action. Must return either
586 C<admin> (which means that authentication as an admin is required),
587 C<user> (authentication as a normal user suffices) with a possible
588 future value C<none> (which would require no authentication but is not
591 =item C<keep_auth_vars_in_form %params>
593 May be overridden by a controller. If falsish (the default) all form
594 variables whose name starts with C<{AUTH}> are removed before the
595 request is routed. Only controllers that handle login requests
596 themselves should return trueish for this function.
598 C<$params{action}> contains the action name that the request will be
601 =item C<controller_name>
603 Returns the name of the curernt controller package without the
604 C<SL::Controller::> prefix. This method can be called both as a class
605 method and an instance method.
609 Returns the name of the currently executing action. If the dispatcher
610 mechanism was used then this is not C<dispatch> but the actual method
611 name the dispatching resolved to.
615 Returns the global presenter object by calling
616 L<SL::Presenter/get>.
620 =head2 PRIVATE FUNCTIONS
622 These functions are supposed to be used from this base class only.
628 Implements the method lookup for indirect dispatching mentioned in the
629 section L</INDIRECT DISPATCHING>.
631 =item C<_run_action $action>
633 Executes a sub based on the value of C<$action>. C<$action> is the sub
634 name part of the C<action> GET or POST parameter as described in
637 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
638 base class is called for L</INDIRECT DISPATCHING>. Otherwise
639 C<$action> is prefixed with C<action_>, and that sub is called on the
640 current controller instance.
646 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>