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) ],
17 'scalar --get_set_init' => [ qw(js) ],
21 # public/helper functions
27 return $_[0] if (scalar(@_) == 1) && !ref($_[0]);
29 my %params = ref($_[0]) eq 'HASH' ? %{ $_[0] } : @_;
30 my $controller = delete($params{controller}) || $self->controller_name;
31 my $action = $params{action} || 'dispatch';
34 if ($controller =~ m/\.pl$/) {
35 # Old-style controller
36 $script = $controller;
38 $params{action} = "${controller}/${action}";
39 $script = "controller.pl";
42 my $query = join '&', map { uri_encode($_->[0]) . '=' . uri_encode($_->[1]) } @{ flatten(\%params) };
44 return "${script}?${query}";
49 my $url = $self->url_for(@_);
51 if ($self->delay_flash_on_redirect) {
52 require SL::Helper::Flash;
53 SL::Helper::Flash::delay_flash();
56 return $self->render(SL::ClientJS->new->redirect_to($self->url_for(@_))) if $::request->is_ajax;
58 print $::request->{cgi}->redirect($url);
64 my ($options, %locals) = (@_ && ref($_[0])) ? @_ : ({ }, @_);
66 # Special handling/shortcut for an instance of SL::ClientJS:
67 return $self->render(\$template->to_json, { type => 'json' }) if ref($template) eq 'SL::ClientJS';
69 # Set defaults for all available options.
77 $options->{$_} //= $defaults{$_} for keys %defaults;
78 $options->{type} = lc $options->{type};
80 # Check supplied options for validity.
81 foreach (keys %{ $options }) {
82 croak "Unsupported option: $_" unless $defaults{$_};
85 # Only certain types are supported.
86 croak "Unsupported type: " . $options->{type} unless $options->{type} =~ m/^(?:html|js|json|text)$/;
88 # The "template" argument must be a string or a reference to one.
89 $template = ${ $template } if ((ref($template) || '') eq 'REF') && (ref(${ $template }) eq 'SL::Presenter::EscapedText');
90 croak "Unsupported 'template' reference type: " . ref($template) if ref($template) && (ref($template) !~ m/^(?:SCALAR|SL::Presenter::EscapedText)$/);
92 # If all output is turned off then don't output the header either.
93 if (!$options->{output}) {
94 $options->{header} = 0;
95 $options->{layout} = 0;
98 # Layout only makes sense if we're outputting HTML.
99 $options->{layout} = 0 if $options->{type} ne 'html';
102 # Let the presenter do the rest of the work.
105 local $::form->{title} = $locals{title} if $locals{title};
106 $output = $self->presenter->render(
108 { type => $options->{type}, process => $options->{process} },
114 if ($options->{header}) {
115 # Output the HTTP response and the layout in case of HTML output.
117 if ($options->{layout}) {
118 $::form->{title} = $locals{title} if $locals{title};
122 # No layout: just the standard HTTP response. Also notify
123 # $::form that the header has already been output so that
124 # $::form->header() won't output it again.
125 $::form->{header} = 1;
126 my $content_type = $options->{type} eq 'html' ? 'text/html'
127 : $options->{type} eq 'js' ? 'text/javascript'
128 : $options->{type} eq 'text' ? 'text/plain'
129 : 'application/json';
131 print $::form->create_http_response(content_type => $content_type,
136 # Print the output if wanted.
137 print $output if $options->{output};
143 my ($self, $file_name_or_content, %params) = @_;
147 if (!ref $file_name_or_content) {
148 $file = IO::File->new($file_name_or_content, 'r') || croak("Cannot open file '${file_name_or_content}'");
149 $size = -s $file_name_or_content;
151 $size = length $$file_name_or_content;
154 my $content_type = $params{type} || 'application/octet_stream';
155 my $attachment_name = $params{name} || (!ref($file_name_or_content) ? $file_name_or_content : '');
156 $attachment_name =~ s:.*//::g;
158 print $::form->create_http_response(content_type => $content_type,
159 content_disposition => 'attachment; filename="' . $attachment_name . '"',
160 content_length => $size);
162 if (!ref $file_name_or_content) {
163 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
165 unlink $file_name_or_content if $params{unlink};
167 $::locale->with_raw_io(\*STDOUT, sub { print $$file_name_or_content });
174 return SL::Presenter->get;
177 sub controller_name {
178 my $class = ref($_[0]) || $_[0];
179 $class =~ s/^SL::Controller:://;
184 SL::ClientJS->new(controller => $_[0])
188 # Before/after run hooks
192 _add_hook('before', @_);
196 _add_hook('after', @_);
202 my ($when, $class, $sub, %params) = @_;
204 foreach my $key (qw(only except)) {
205 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
208 my $idx = "${when}/${class}";
209 $hooks{$idx} ||= [ ];
210 push @{ $hooks{$idx} }, { %params, code => $sub };
214 my ($self, $when, $action) = @_;
216 my $idx = "${when}/" . ref($self);
218 foreach my $hook (@{ $hooks{$idx} || [] }) {
219 next if ($hook->{only } && !$hook->{only }->{$action})
220 || ($hook->{except} && $hook->{except}->{$action});
222 if (ref($hook->{code}) eq 'CODE') {
223 $hook->{code}->($self, $action);
225 my $sub = $hook->{code};
226 $self->$sub($action);
232 # behaviour. override these
235 sub delay_flash_on_redirect {
240 # Ignore the 'action' parameter.
244 sub keep_auth_vars_in_form {
249 # private functions -- for use in Base only
255 my $sub = "action_${action}";
257 return $self->_dispatch(@_) if $action eq 'dispatch';
259 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
261 $self->action_name($action);
262 $self->_run_hooks('before', $action);
264 $self->_run_hooks('after', $action);
271 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
272 my $action = first { $::form->{"action_${_}"} } @actions;
273 my $sub = "action_${action}";
275 if ($self->can($sub)) {
276 $self->action_name($action);
277 $self->_run_hooks('before', $action);
279 $self->_run_hooks('after', $action);
281 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
291 SL::Controller::Base - base class for all action controllers
297 This is a base class for all action controllers. Action controllers
298 provide subs that are callable by special URLs.
300 For each request made to the web server an instance of the controller
301 will be created. After the request has been served that instance will
302 handed over to garbage collection.
304 This base class is derived from L<Rose::Object>.
308 The URLs have the following properties:
314 The script part of the URL must be C<controller.pl>.
318 There must be a GET or POST parameter named C<action> containing the
319 name of the controller and the sub to call separated by C</>,
320 e.g. C<Message/list>.
324 The controller name is the package's name without the
325 C<SL::Controller::> prefix. At the moment only packages in the
326 C<SL::Controller> namespace are valid; sub-namespaces are not
327 allowed. The package name must start with an upper-case letter.
331 The sub part of the C<action> parameter is the name of the sub to
332 call. However, the sub's name is automatically prefixed with
333 C<action_>. Therefore for the example C<Message/list> the sub
334 C<SL::DB::Message::action_list> would be called. This in turn means
335 that subs whose name does not start with C<action_> cannot be invoked
336 directly via the URL.
340 =head2 INDIRECT DISPATCHING
342 In the case that there are several submit buttons on a page it is
343 often impractical to have a single C<action> parameter match up
344 properly. For such a case a special dispatcher method is available. In
345 that case the C<action> parameter of the URL must be
346 C<Controller/dispatch>.
348 The C<SL::Controller::Base::_dispatch> method will iterate over all
349 subs in the controller package whose names start with C<action_>. The
350 first one for which there's a GET or POST parameter with the same name
351 and that's trueish is called.
353 Usage from a template usually looks like this:
355 <form method="POST" action="controller.pl">
357 <input type="hidden" name="action" value="Message/dispatch">
358 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
359 <input type="submit" name="action_delete" value="Delete messages">
362 The dispatching is handled by the function L</_dispatch>.
366 Hooks are functions that are called before or after the controller's
367 action is called. The controller package defines the hooks, and those
368 hooks themselves are run as instance methods.
370 Hooks are run in the order they're added.
372 The hooks receive a single parameter: the name of the action that is
373 about to be called (for C<before> hooks) / was called (for C<after>
376 The return value of the hooks is discarded.
378 Hooks can be defined to run for all actions, for only specific actions
379 or for all actions except a list of actions. Each entry is the action
380 name, not the sub's name. Therefore in order to run a hook before one
381 of the subs C<action_edit> or C<action_save> is called the following
384 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
388 =head2 PUBLIC HELPER FUNCTIONS
390 These functions are supposed to be called by sub-classed controllers.
394 =item C<render $template, [ $options, ] %locals>
396 Renders the template C<$template>. Provides other variables than
397 C<Form::parse_html_template> does.
399 C<$options>, if present, must be a hash reference. All remaining
400 parameters are slurped into C<%locals>.
402 What is rendered and how C<$template> is interpreted is determined
403 both by C<$template>'s reference type and by the supplied options. The
404 actual rendering is handled by L<SL::Presenter/render>.
406 If C<$template> is a normal scalar (not a reference) then it is meant
407 to be a template file name relative to the C<templates/webpages>
408 directory. The file name to use is determined by the C<type> option.
410 If C<$template> is a reference to a scalar then the referenced
411 scalar's content is used as the content to process. The C<type> option
412 is not considered in this case.
414 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
415 or a reference to such an instance. Both of these cases are handled
416 the same way as if C<$template> were a reference to a scalar: its
417 content is processed, and C<type> is not considered.
419 Other reference types, unknown options and unknown arguments to the
420 C<type> option cause the function to L<croak>.
422 The following options are available (defaults: C<type> = 'html',
423 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
429 The template type. Can be C<html> (the default), C<js> for JavaScript,
430 C<json> for JSON and C<text> for plain text content. Affects the
431 extension that's added to the file name given with a non-reference
432 C<$template> argument, the content type HTTP header that is output and
433 whether or not the layout will be output as well (see description of
438 If trueish (which is also the default) it causes the template/content
439 to be processed by the Template toolkit. Otherwise the
440 template/content is output as-is.
444 If trueish (the default) then the generated output will be sent to the
445 browser in addition to being returned. If falsish then the options
446 C<header> and C<layout> are set to 0 as well.
450 Determines whether or not to output the HTTP response
451 headers. Defaults to the same value that C<output> is set to. If set
452 to falsish then the layout is not output either.
456 Determines whether or not the basic HTML layout structure should be
457 output (HTML header, common JavaScript and stylesheet inclusions, menu
458 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
459 C<header> is set to otherwise.
463 The template itself has access to several variables. These are listed
464 in the documentation to L<SL::Presenter/render>.
466 The function will always return the output.
468 Example: Render a HTML template with a certain title and a few locals
470 $self->render('todo/list',
471 title => 'List TODO items',
472 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
474 Example: Render a string and return its content for further processing
475 by the calling function. No header is generated due to C<output>.
477 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
480 Example: Render a JavaScript template
481 "templates/webpages/todo/single_item.js" and send it to the
482 browser. Typical use for actions called via AJAX:
484 $self->render('todo/single_item', { type => 'js' },
485 item => $employee->most_important_todo_item);
487 =item C<send_file $file_name_or_content, [%params]>
489 Sends the file C<$file_name_or_content> to the browser including
490 appropriate HTTP headers for a download. If C<$file_name_or_content>
491 is a scalar then it is interpreted as a file name which is opened and
492 whose content is sent. Otherwise (C<$file_name_or_content> being a
493 reference) the referenced scalar's data itself is sent.
495 C<%params> can include the following:
499 =item * C<type> -- the file's content type; defaults to
500 'application/octet_stream'
502 =item * C<name> -- the name presented to the browser; defaults to
503 C<$file_name>; mandatory if C<$file_name_or_content> is a reference
505 =item * C<unlink> -- if trueish and C<$file_name_or_content> refers to
506 a file name then unlink the file after it has been sent to the browser
507 (e.g. for temporary files)
511 =item C<url_for $url>
513 =item C<url_for $params>
515 =item C<url_for %params>
517 Creates an URL for the given parameters suitable for calling an action
518 controller. If there's only one scalar parameter then it is returned
521 Otherwise the parameters are given either as a single hash ref
522 parameter or as a normal hash.
524 The controller to call is given by C<$params{controller}>. It defaults
525 to the current controller as returned by
528 The action to call is given by C<$params{action}>. It defaults to
531 All other key/value pairs in C<%params> are appended as GET parameters
534 Usage from a template might look like this:
536 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
538 =item C<redirect_to %url_params>
540 Redirects the browser to a new URL. The URL is generated by calling
541 L</url_for> with C<%url_params>.
543 This function implements the redirection depending on whether or not
544 the current request is an AJAX request as determined by
545 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
546 standard HTTP redirect header (HTTP code 302). If it is an AJAX
547 request then it outputs an AJAX response suitable for the
548 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
550 =item C<run_before $sub, %params>
552 =item C<run_after $sub, %params>
554 Adds a hook to run before or after certain actions are run for the
555 current package. The code to run is C<$sub> which is either the name
556 of an instance method or a code reference. If it's the latter then the
557 first parameter will be C<$self>.
559 C<%params> can contain two possible values that restrict the code to
560 be run only for certain actions:
564 =item C<< only => \@list >>
566 Only run the code for actions given in C<@list>. The entries are the
567 action names, not the names of the sub (so it's C<list> instead of
570 =item C<< except => \@list >>
572 Run the code for all actions but for those given in C<@list>. The
573 entries are the action names, not the names of the sub (so it's
574 C<list> instead of C<action_list>).
578 If neither restriction is used then the code will be run for any
581 The hook's return values are discarded.
583 =item C<delay_flash_on_redirect>
585 May be overridden by a controller. If this method returns true, redirect_to
586 will delay all flash messages for the current request. Defaults to false for
587 compatibility reasons.
589 =item C<get_auth_level $action>
591 May be overridden by a controller. Determines what kind of
592 authentication is required for a particular action. Must return either
593 C<admin> (which means that authentication as an admin is required),
594 C<user> (authentication as a normal user suffices) with a possible
595 future value C<none> (which would require no authentication but is not
598 =item C<keep_auth_vars_in_form %params>
600 May be overridden by a controller. If falsish (the default) all form
601 variables whose name starts with C<{AUTH}> are removed before the
602 request is routed. Only controllers that handle login requests
603 themselves should return trueish for this function.
605 C<$params{action}> contains the action name that the request will be
608 =item C<controller_name>
610 Returns the name of the curernt controller package without the
611 C<SL::Controller::> prefix. This method can be called both as a class
612 method and an instance method.
616 Returns the name of the currently executing action. If the dispatcher
617 mechanism was used then this is not C<dispatch> but the actual method
618 name the dispatching resolved to.
622 Returns the global presenter object by calling
623 L<SL::Presenter/get>.
627 Returns an L<SL::ClientJS> instance for this controller.
631 =head2 PRIVATE FUNCTIONS
633 These functions are supposed to be used from this base class only.
639 Implements the method lookup for indirect dispatching mentioned in the
640 section L</INDIRECT DISPATCHING>.
642 =item C<_run_action $action>
644 Executes a sub based on the value of C<$action>. C<$action> is the sub
645 name part of the C<action> GET or POST parameter as described in
648 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
649 base class is called for L</INDIRECT DISPATCHING>. Otherwise
650 C<$action> is prefixed with C<action_>, and that sub is called on the
651 current controller instance.
657 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>