1 package SL::Controller::Base;
5 use parent qw(Rose::Object);
9 use List::Util qw(first);
11 use SL::Request qw(flatten);
12 use SL::MoreCommon qw(uri_encode);
15 use Rose::Object::MakeMethods::Generic
17 scalar => [ qw(action_name) ],
18 'scalar --get_set_init' => [ qw(js) ],
22 # public/helper functions
28 return $_[0] if (scalar(@_) == 1) && !ref($_[0]);
30 my %params = ref($_[0]) eq 'HASH' ? %{ $_[0] } : @_;
31 my $controller = delete($params{controller}) || $self->controller_name;
32 my $action = $params{action} || 'dispatch';
33 my $fragment = delete $params{fragment};
36 if ($controller =~ m/\.pl$/) {
37 # Old-style controller
38 $script = $controller;
40 $params{action} = "${controller}/${action}";
41 $script = "controller.pl";
44 my $query = join '&', map { uri_encode($_->[0]) . '=' . uri_encode($_->[1]) } @{ flatten(\%params) };
46 return "${script}?${query}" . (defined $fragment ? "#$fragment" : '');
51 my $url = $self->url_for(@_);
53 if ($self->delay_flash_on_redirect) {
54 require SL::Helper::Flash;
55 SL::Helper::Flash::delay_flash();
58 return $self->render(SL::ClientJS->new->redirect_to($url)) if $::request->is_ajax;
60 print $::request->{cgi}->redirect($url);
66 my ($options, %locals) = (@_ && ref($_[0])) ? @_ : ({ }, @_);
68 # Special handling/shortcut for an instance of SL::ClientJS:
69 return $self->render(\$template->to_json, { type => 'json' }) if ref($template) eq 'SL::ClientJS';
71 # Set defaults for all available options.
80 $options->{$_} //= $defaults{$_} for keys %defaults;
81 $options->{type} = lc $options->{type};
83 # Check supplied options for validity.
84 foreach (keys %{ $options }) {
85 croak "Unsupported option: $_" unless $defaults{$_};
88 # Only certain types are supported.
89 croak "Unsupported type: " . $options->{type} unless $options->{type} =~ m/^(?:html|js|json|text)$/;
91 # The "template" argument must be a string or a reference to one.
92 $template = ${ $template } if ((ref($template) || '') eq 'REF') && (ref(${ $template }) eq 'SL::Presenter::EscapedText');
93 croak "Unsupported 'template' reference type: " . ref($template) if ref($template) && (ref($template) !~ m/^(?:SCALAR|SL::Presenter::EscapedText)$/);
95 # If all output is turned off then don't output the header either.
96 if (!$options->{output}) {
97 $options->{header} = 0;
98 $options->{layout} = 0;
101 # Layout only makes sense if we're outputting HTML.
102 $options->{layout} = 0 if $options->{type} ne 'html';
105 # Let the presenter do the rest of the work.
108 local $::form->{title} = $locals{title} if $locals{title};
109 $output = $self->presenter->render(
111 { type => $options->{type}, process => $options->{process} },
117 if ($options->{header}) {
118 # Output the HTTP response and the layout in case of HTML output.
120 if ($options->{layout}) {
121 $::form->{title} = $locals{title} if $locals{title};
125 # No layout: just the standard HTTP response. Also notify
126 # $::form that the header has already been output so that
127 # $::form->header() won't output it again.
128 $::form->{header} = 1;
129 my $content_type = $options->{type} eq 'html' ? 'text/html'
130 : $options->{type} eq 'js' ? 'text/javascript'
131 : $options->{type} eq 'text' ? 'text/plain'
132 : 'application/json';
134 print $::form->create_http_response(content_type => $content_type,
136 (status => $options->{status}) x !!$options->{status});
140 # Print the output if wanted.
141 print $output if $options->{output};
147 my ($self, $file_name_or_content, %params) = @_;
151 if (!ref $file_name_or_content) {
152 $file = IO::File->new($file_name_or_content, 'r') || croak("Cannot open file '${file_name_or_content}'");
153 $size = -s $file_name_or_content;
155 $size = length $$file_name_or_content;
158 my $content_type = $params{type} || 'application/octet_stream';
159 my $attachment_name = $params{name} || (!ref($file_name_or_content) ? $file_name_or_content : '');
160 $attachment_name =~ s:.*//::g;
162 if ($::request->is_ajax || $params{ajax}) {
163 my $octets = ref $file_name_or_content ? $file_name_or_content : \ do { local $/ = undef; <$file> };
164 $self->js->save_file(MIME::Base64::encode_base64($$octets), $content_type, $size, $attachment_name);
165 $self->js->render unless $params{js_no_render};
167 print $::form->create_http_response(content_type => $content_type,
168 content_disposition => 'attachment; filename="' . $attachment_name . '"',
169 content_length => $size);
171 if (!ref $file_name_or_content) {
172 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
174 unlink $file_name_or_content if $params{unlink};
176 $::locale->with_raw_io(\*STDOUT, sub { print $$file_name_or_content });
184 return SL::Presenter->get;
187 sub controller_name {
188 my $class = ref($_[0]) || $_[0];
189 $class =~ s/^SL::Controller:://;
194 SL::ClientJS->new(controller => $_[0])
198 # Before/after run hooks
202 _add_hook('before', @_);
206 _add_hook('after', @_);
212 my ($when, $class, $sub, %params) = @_;
214 foreach my $key (qw(only except)) {
215 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
218 my $idx = "${when}/${class}";
219 $hooks{$idx} ||= [ ];
220 push @{ $hooks{$idx} }, { %params, code => $sub };
224 my ($self, $when, $action) = @_;
226 my $idx = "${when}/" . ref($self);
228 foreach my $hook (@{ $hooks{$idx} || [] }) {
229 next if ($hook->{only } && !$hook->{only }->{$action})
230 || ($hook->{except} && $hook->{except}->{$action});
232 if (ref($hook->{code}) eq 'CODE') {
233 $hook->{code}->($self, $action);
235 my $sub = $hook->{code};
236 $self->$sub($action);
242 # behaviour. override these
245 sub delay_flash_on_redirect {
250 # Ignore the 'action' parameter.
254 sub keep_auth_vars_in_form {
259 # private functions -- for use in Base only
265 my $sub = "action_${action}";
267 return $self->_dispatch(@_) if $action eq 'dispatch';
269 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
271 $self->action_name($action);
272 $self->_run_hooks('before', $action);
274 $self->_run_hooks('after', $action);
281 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
282 my $action = first { $::form->{"action_${_}"} } @actions;
283 my $sub = "action_${action}";
285 if ($self->can($sub)) {
286 $self->action_name($action);
287 $self->_run_hooks('before', $action);
289 $self->_run_hooks('after', $action);
291 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
301 SL::Controller::Base - base class for all action controllers
307 This is a base class for all action controllers. Action controllers
308 provide subs that are callable by special URLs.
310 For each request made to the web server an instance of the controller
311 will be created. After the request has been served that instance will
312 handed over to garbage collection.
314 This base class is derived from L<Rose::Object>.
318 The URLs have the following properties:
324 The script part of the URL must be C<controller.pl>.
328 There must be a GET or POST parameter named C<action> containing the
329 name of the controller and the sub to call separated by C</>,
330 e.g. C<Message/list>.
334 The controller name is the package's name without the
335 C<SL::Controller::> prefix. At the moment only packages in the
336 C<SL::Controller> namespace are valid; sub-namespaces are not
337 allowed. The package name must start with an upper-case letter.
341 The sub part of the C<action> parameter is the name of the sub to
342 call. However, the sub's name is automatically prefixed with
343 C<action_>. Therefore for the example C<Message/list> the sub
344 C<SL::DB::Message::action_list> would be called. This in turn means
345 that subs whose name does not start with C<action_> cannot be invoked
346 directly via the URL.
350 =head2 INDIRECT DISPATCHING
352 In the case that there are several submit buttons on a page it is
353 often impractical to have a single C<action> parameter match up
354 properly. For such a case a special dispatcher method is available. In
355 that case the C<action> parameter of the URL must be
356 C<Controller/dispatch>.
358 The C<SL::Controller::Base::_dispatch> method will iterate over all
359 subs in the controller package whose names start with C<action_>. The
360 first one for which there's a GET or POST parameter with the same name
361 and that's trueish is called.
363 Usage from a template usually looks like this:
365 <form method="POST" action="controller.pl">
367 <input type="hidden" name="action" value="Message/dispatch">
368 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
369 <input type="submit" name="action_delete" value="Delete messages">
372 The dispatching is handled by the function L</_dispatch>.
376 Hooks are functions that are called before or after the controller's
377 action is called. The controller package defines the hooks, and those
378 hooks themselves are run as instance methods.
380 Hooks are run in the order they're added.
382 The hooks receive a single parameter: the name of the action that is
383 about to be called (for C<before> hooks) / was called (for C<after>
386 The return value of the hooks is discarded.
388 Hooks can be defined to run for all actions, for only specific actions
389 or for all actions except a list of actions. Each entry is the action
390 name, not the sub's name. Therefore in order to run a hook before one
391 of the subs C<action_edit> or C<action_save> is called the following
394 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
398 =head2 PUBLIC HELPER FUNCTIONS
400 These functions are supposed to be called by sub-classed controllers.
404 =item C<render $template, [ $options, ] %locals>
406 Renders the template C<$template>. Provides other variables than
407 C<Form::parse_html_template> does.
409 C<$options>, if present, must be a hash reference. All remaining
410 parameters are slurped into C<%locals>.
412 What is rendered and how C<$template> is interpreted is determined
413 both by C<$template>'s reference type and by the supplied options. The
414 actual rendering is handled by L<SL::Presenter/render>.
416 If C<$template> is a normal scalar (not a reference) then it is meant
417 to be a template file name relative to the C<templates/webpages>
418 directory. The file name to use is determined by the C<type> option.
420 If C<$template> is a reference to a scalar then the referenced
421 scalar's content is used as the content to process. The C<type> option
422 is not considered in this case.
424 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
425 or a reference to such an instance. Both of these cases are handled
426 the same way as if C<$template> were a reference to a scalar: its
427 content is processed, and C<type> is not considered.
429 Other reference types, unknown options and unknown arguments to the
430 C<type> option cause the function to L<croak>.
432 The following options are available (defaults: C<type> = 'html',
433 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
439 The template type. Can be C<html> (the default), C<js> for JavaScript,
440 C<json> for JSON and C<text> for plain text content. Affects the
441 extension that's added to the file name given with a non-reference
442 C<$template> argument, the content type HTTP header that is output and
443 whether or not the layout will be output as well (see description of
448 If trueish (which is also the default) it causes the template/content
449 to be processed by the Template toolkit. Otherwise the
450 template/content is output as-is.
454 If trueish (the default) then the generated output will be sent to the
455 browser in addition to being returned. If falsish then the options
456 C<header> and C<layout> are set to 0 as well.
460 Determines whether or not to output the HTTP response
461 headers. Defaults to the same value that C<output> is set to. If set
462 to falsish then the layout is not output either.
466 Determines whether or not the basic HTML layout structure should be
467 output (HTML header, common JavaScript and stylesheet inclusions, menu
468 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
469 C<header> is set to otherwise.
473 The template itself has access to several variables. These are listed
474 in the documentation to L<SL::Presenter/render>.
476 The function will always return the output.
478 Example: Render a HTML template with a certain title and a few locals
480 $self->render('todo/list',
481 title => 'List TODO items',
482 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
484 Example: Render a string and return its content for further processing
485 by the calling function. No header is generated due to C<output>.
487 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
490 Example: Render a JavaScript template
491 "templates/webpages/todo/single_item.js" and send it to the
492 browser. Typical use for actions called via AJAX:
494 $self->render('todo/single_item', { type => 'js' },
495 item => $employee->most_important_todo_item);
497 =item C<send_file $file_name_or_content, [%params]>
499 Sends the file C<$file_name_or_content> to the browser including
500 appropriate HTTP headers for a download. If C<$file_name_or_content>
501 is a scalar then it is interpreted as a file name which is opened and
502 whose content is sent. Otherwise (C<$file_name_or_content> being a
503 reference) the referenced scalar's data itself is sent.
505 C<%params> can include the following:
509 =item * C<type> -- the file's content type; defaults to
510 'application/octet_stream'
512 =item * C<name> -- the name presented to the browser; defaults to
513 C<$file_name>; mandatory if C<$file_name_or_content> is a reference
515 =item * C<unlink> -- if trueish and C<$file_name_or_content> refers to
516 a file name then unlink the file after it has been sent to the browser
517 (e.g. for temporary files)
521 =item C<url_for $url>
523 =item C<url_for $params>
525 =item C<url_for %params>
527 Creates an URL for the given parameters suitable for calling an action
528 controller. If there's only one scalar parameter then it is returned
531 Otherwise the parameters are given either as a single hash ref
532 parameter or as a normal hash.
534 The controller to call is given by C<$params{controller}>. It defaults
535 to the current controller as returned by
538 The action to call is given by C<$params{action}>. It defaults to
541 If C<$params{fragment}> is present, it's used as the fragment of the resulting
544 All other key/value pairs in C<%params> are appended as GET parameters
547 Usage from a template might look like this:
549 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
551 =item C<redirect_to %url_params>
553 Redirects the browser to a new URL. The URL is generated by calling
554 L</url_for> with C<%url_params>.
556 This function implements the redirection depending on whether or not
557 the current request is an AJAX request as determined by
558 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
559 standard HTTP redirect header (HTTP code 302). If it is an AJAX
560 request then it outputs an AJAX response suitable for the
561 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
563 =item C<run_before $sub, %params>
565 =item C<run_after $sub, %params>
567 Adds a hook to run before or after certain actions are run for the
568 current package. The code to run is C<$sub> which is either the name
569 of an instance method or a code reference. If it's the latter then the
570 first parameter will be C<$self>.
572 C<%params> can contain two possible values that restrict the code to
573 be run only for certain actions:
577 =item C<< only => \@list >>
579 Only run the code for actions given in C<@list>. The entries are the
580 action names, not the names of the sub (so it's C<list> instead of
583 =item C<< except => \@list >>
585 Run the code for all actions but for those given in C<@list>. The
586 entries are the action names, not the names of the sub (so it's
587 C<list> instead of C<action_list>).
591 If neither restriction is used then the code will be run for any
594 The hook's return values are discarded.
596 =item C<delay_flash_on_redirect>
598 May be overridden by a controller. If this method returns true, redirect_to
599 will delay all flash messages for the current request. Defaults to false for
600 compatibility reasons.
602 =item C<get_auth_level $action>
604 May be overridden by a controller. Determines what kind of
605 authentication is required for a particular action. Must return either
606 C<admin> (which means that authentication as an admin is required),
607 C<user> (authentication as a normal user suffices) with a possible
608 future value C<none> (which would require no authentication but is not
611 =item C<keep_auth_vars_in_form %params>
613 May be overridden by a controller. If falsish (the default) all form
614 variables whose name starts with C<{AUTH}> are removed before the
615 request is routed. Only controllers that handle login requests
616 themselves should return trueish for this function.
618 C<$params{action}> contains the action name that the request will be
621 =item C<controller_name>
623 Returns the name of the curernt controller package without the
624 C<SL::Controller::> prefix. This method can be called both as a class
625 method and an instance method.
629 Returns the name of the currently executing action. If the dispatcher
630 mechanism was used then this is not C<dispatch> but the actual method
631 name the dispatching resolved to.
635 Returns the global presenter object by calling
636 L<SL::Presenter/get>.
640 Returns an L<SL::ClientJS> instance for this controller.
644 =head2 PRIVATE FUNCTIONS
646 These functions are supposed to be used from this base class only.
652 Implements the method lookup for indirect dispatching mentioned in the
653 section L</INDIRECT DISPATCHING>.
655 =item C<_run_action $action>
657 Executes a sub based on the value of C<$action>. C<$action> is the sub
658 name part of the C<action> GET or POST parameter as described in
661 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
662 base class is called for L</INDIRECT DISPATCHING>. Otherwise
663 C<$action> is prefixed with C<action_>, and that sub is called on the
664 current controller instance.
670 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>