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_or_content, %params) = @_;
142 if (!ref $file_name_or_content) {
143 $file = IO::File->new($file_name_or_content, 'r') || croak("Cannot open file '${file_name_or_content}'");
144 $size = -s $file_name_or_content;
146 $size = length $$file_name_or_content;
149 my $content_type = $params{type} || 'application/octet_stream';
150 my $attachment_name = $params{name} || (!ref($file_name_or_content) ? $file_name_or_content : '');
151 $attachment_name =~ s:.*//::g;
153 print $::form->create_http_response(content_type => $content_type,
154 content_disposition => 'attachment; filename="' . $attachment_name . '"',
155 content_length => $size);
157 if (!ref $file_name_or_content) {
158 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
161 $::locale->with_raw_io(\*STDOUT, sub { print $$file_name_or_content });
166 return SL::Presenter->get;
169 sub controller_name {
170 my $class = ref($_[0]) || $_[0];
171 $class =~ s/^SL::Controller:://;
176 # Before/after run hooks
180 _add_hook('before', @_);
184 _add_hook('after', @_);
190 my ($when, $class, $sub, %params) = @_;
192 foreach my $key (qw(only except)) {
193 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
196 my $idx = "${when}/${class}";
197 $hooks{$idx} ||= [ ];
198 push @{ $hooks{$idx} }, { %params, code => $sub };
202 my ($self, $when, $action) = @_;
204 my $idx = "${when}/" . ref($self);
206 foreach my $hook (@{ $hooks{$idx} || [] }) {
207 next if ($hook->{only } && !$hook->{only }->{$action})
208 || ($hook->{except} && $hook->{except}->{$action});
210 if (ref($hook->{code}) eq 'CODE') {
211 $hook->{code}->($self, $action);
213 my $sub = $hook->{code};
214 $self->$sub($action);
220 # behaviour. override these
223 sub delay_flash_on_redirect {
228 # Ignore the 'action' parameter.
232 sub keep_auth_vars_in_form {
237 # private functions -- for use in Base only
243 my $sub = "action_${action}";
245 return $self->_dispatch(@_) if $action eq 'dispatch';
247 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
249 $self->action_name($action);
250 $self->_run_hooks('before', $action);
252 $self->_run_hooks('after', $action);
259 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
260 my $action = first { $::form->{"action_${_}"} } @actions;
261 my $sub = "action_${action}";
263 if ($self->can($sub)) {
264 $self->action_name($action);
265 $self->_run_hooks('before', $action);
267 $self->_run_hooks('after', $action);
269 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
279 SL::Controller::Base - base class for all action controllers
285 This is a base class for all action controllers. Action controllers
286 provide subs that are callable by special URLs.
288 For each request made to the web server an instance of the controller
289 will be created. After the request has been served that instance will
290 handed over to garbage collection.
292 This base class is derived from L<Rose::Object>.
296 The URLs have the following properties:
302 The script part of the URL must be C<controller.pl>.
306 There must be a GET or POST parameter named C<action> containing the
307 name of the controller and the sub to call separated by C</>,
308 e.g. C<Message/list>.
312 The controller name is the package's name without the
313 C<SL::Controller::> prefix. At the moment only packages in the
314 C<SL::Controller> namespace are valid; sub-namespaces are not
315 allowed. The package name must start with an upper-case letter.
319 The sub part of the C<action> parameter is the name of the sub to
320 call. However, the sub's name is automatically prefixed with
321 C<action_>. Therefore for the example C<Message/list> the sub
322 C<SL::DB::Message::action_list> would be called. This in turn means
323 that subs whose name does not start with C<action_> cannot be invoked
324 directly via the URL.
328 =head2 INDIRECT DISPATCHING
330 In the case that there are several submit buttons on a page it is
331 often impractical to have a single C<action> parameter match up
332 properly. For such a case a special dispatcher method is available. In
333 that case the C<action> parameter of the URL must be
334 C<Controller/dispatch>.
336 The C<SL::Controller::Base::_dispatch> method will iterate over all
337 subs in the controller package whose names start with C<action_>. The
338 first one for which there's a GET or POST parameter with the same name
339 and that's trueish is called.
341 Usage from a template usually looks like this:
343 <form method="POST" action="controller.pl">
345 <input type="hidden" name="action" value="Message/dispatch">
346 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
347 <input type="submit" name="action_delete" value="Delete messages">
350 The dispatching is handled by the function L</_dispatch>.
354 Hooks are functions that are called before or after the controller's
355 action is called. The controller package defines the hooks, and those
356 hooks themselves are run as instance methods.
358 Hooks are run in the order they're added.
360 The hooks receive a single parameter: the name of the action that is
361 about to be called (for C<before> hooks) / was called (for C<after>
364 The return value of the hooks is discarded.
366 Hooks can be defined to run for all actions, for only specific actions
367 or for all actions except a list of actions. Each entry is the action
368 name, not the sub's name. Therefore in order to run a hook before one
369 of the subs C<action_edit> or C<action_save> is called the following
372 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
376 =head2 PUBLIC HELPER FUNCTIONS
378 These functions are supposed to be called by sub-classed controllers.
382 =item C<render $template, [ $options, ] %locals>
384 Renders the template C<$template>. Provides other variables than
385 C<Form::parse_html_template> does.
387 C<$options>, if present, must be a hash reference. All remaining
388 parameters are slurped into C<%locals>.
390 What is rendered and how C<$template> is interpreted is determined
391 both by C<$template>'s reference type and by the supplied options. The
392 actual rendering is handled by L<SL::Presenter/render>.
394 If C<$template> is a normal scalar (not a reference) then it is meant
395 to be a template file name relative to the C<templates/webpages>
396 directory. The file name to use is determined by the C<type> option.
398 If C<$template> is a reference to a scalar then the referenced
399 scalar's content is used as the content to process. The C<type> option
400 is not considered in this case.
402 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
403 or a reference to such an instance. Both of these cases are handled
404 the same way as if C<$template> were a reference to a scalar: its
405 content is processed, and C<type> is not considered.
407 Other reference types, unknown options and unknown arguments to the
408 C<type> option cause the function to L<croak>.
410 The following options are available (defaults: C<type> = 'html',
411 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
417 The template type. Can be C<html> (the default), C<js> for JavaScript,
418 C<json> for JSON and C<text> for plain text content. Affects the
419 extension that's added to the file name given with a non-reference
420 C<$template> argument, the content type HTTP header that is output and
421 whether or not the layout will be output as well (see description of
426 If trueish (which is also the default) it causes the template/content
427 to be processed by the Template toolkit. Otherwise the
428 template/content is output as-is.
432 If trueish (the default) then the generated output will be sent to the
433 browser in addition to being returned. If falsish then the options
434 C<header> and C<layout> are set to 0 as well.
438 Determines whether or not to output the HTTP response
439 headers. Defaults to the same value that C<output> is set to. If set
440 to falsish then the layout is not output either.
444 Determines whether or not the basic HTML layout structure should be
445 output (HTML header, common JavaScript and stylesheet inclusions, menu
446 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
447 C<header> is set to otherwise.
451 The template itself has access to several variables. These are listed
452 in the documentation to L<SL::Presenter/render>.
454 The function will always return the output.
456 Example: Render a HTML template with a certain title and a few locals
458 $self->render('todo/list',
459 title => 'List TODO items',
460 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
462 Example: Render a string and return its content for further processing
463 by the calling function. No header is generated due to C<output>.
465 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
468 Example: Render a JavaScript template
469 "templates/webpages/todo/single_item.js" and send it to the
470 browser. Typical use for actions called via AJAX:
472 $self->render('todo/single_item', { type => 'js' },
473 item => $employee->most_important_todo_item);
475 =item C<send_file $file_name_or_content, [%params]>
477 Sends the file C<$file_name_or_content> to the browser including
478 appropriate HTTP headers for a download. If C<$file_name_or_content>
479 is a scalar then it is interpreted as a file name which is opened and
480 whose content is sent. Otherwise (C<$file_name_or_content> being a
481 reference) the referenced scalar's data itself is sent.
483 C<%params> can include the following:
487 =item * C<type> -- the file's content type; defaults to
488 'application/octet_stream'
490 =item * C<name> -- the name presented to the browser; defaults to
491 C<$file_name>; mandatory if C<$file_name_or_content> is a reference
495 =item C<url_for $url>
497 =item C<url_for $params>
499 =item C<url_for %params>
501 Creates an URL for the given parameters suitable for calling an action
502 controller. If there's only one scalar parameter then it is returned
505 Otherwise the parameters are given either as a single hash ref
506 parameter or as a normal hash.
508 The controller to call is given by C<$params{controller}>. It defaults
509 to the current controller as returned by
512 The action to call is given by C<$params{action}>. It defaults to
515 All other key/value pairs in C<%params> are appended as GET parameters
518 Usage from a template might look like this:
520 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
522 =item C<redirect_to %url_params>
524 Redirects the browser to a new URL. The URL is generated by calling
525 L</url_for> with C<%url_params>.
527 This function implements the redirection depending on whether or not
528 the current request is an AJAX request as determined by
529 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
530 standard HTTP redirect header (HTTP code 302). If it is an AJAX
531 request then it outputs an AJAX response suitable for the
532 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
534 =item C<run_before $sub, %params>
536 =item C<run_after $sub, %params>
538 Adds a hook to run before or after certain actions are run for the
539 current package. The code to run is C<$sub> which is either the name
540 of an instance method or a code reference. If it's the latter then the
541 first parameter will be C<$self>.
543 C<%params> can contain two possible values that restrict the code to
544 be run only for certain actions:
548 =item C<< only => \@list >>
550 Only run the code for actions given in C<@list>. The entries are the
551 action names, not the names of the sub (so it's C<list> instead of
554 =item C<< except => \@list >>
556 Run the code for all actions but for those given in C<@list>. The
557 entries are the action names, not the names of the sub (so it's
558 C<list> instead of C<action_list>).
562 If neither restriction is used then the code will be run for any
565 The hook's return values are discarded.
567 =item C<delay_flash_on_redirect>
569 May be overridden by a controller. If this method returns true, redirect_to
570 will delay all flash messages for the current request. Defaults to false for
571 compatibility reasons.
573 =item C<get_auth_level $action>
575 May be overridden by a controller. Determines what kind of
576 authentication is required for a particular action. Must return either
577 C<admin> (which means that authentication as an admin is required),
578 C<user> (authentication as a normal user suffices) with a possible
579 future value C<none> (which would require no authentication but is not
582 =item C<keep_auth_vars_in_form %params>
584 May be overridden by a controller. If falsish (the default) all form
585 variables whose name starts with C<{AUTH}> are removed before the
586 request is routed. Only controllers that handle login requests
587 themselves should return trueish for this function.
589 C<$params{action}> contains the action name that the request will be
592 =item C<controller_name>
594 Returns the name of the curernt controller package without the
595 C<SL::Controller::> prefix. This method can be called both as a class
596 method and an instance method.
600 Returns the name of the currently executing action. If the dispatcher
601 mechanism was used then this is not C<dispatch> but the actual method
602 name the dispatching resolved to.
606 Returns the global presenter object by calling
607 L<SL::Presenter/get>.
611 =head2 PRIVATE FUNCTIONS
613 These functions are supposed to be used from this base class only.
619 Implements the method lookup for indirect dispatching mentioned in the
620 section L</INDIRECT DISPATCHING>.
622 =item C<_run_action $action>
624 Executes a sub based on the value of C<$action>. C<$action> is the sub
625 name part of the C<action> GET or POST parameter as described in
628 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
629 base class is called for L</INDIRECT DISPATCHING>. Otherwise
630 C<$action> is prefixed with C<action_>, and that sub is called on the
631 current controller instance.
637 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>