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.
79 $options->{$_} //= $defaults{$_} for keys %defaults;
80 $options->{type} = lc $options->{type};
82 # Check supplied options for validity.
83 foreach (keys %{ $options }) {
84 croak "Unsupported option: $_" unless $defaults{$_};
87 # Only certain types are supported.
88 croak "Unsupported type: " . $options->{type} unless $options->{type} =~ m/^(?:html|js|json|text)$/;
90 # The "template" argument must be a string or a reference to one.
91 $template = ${ $template } if ((ref($template) || '') eq 'REF') && (ref(${ $template }) eq 'SL::Presenter::EscapedText');
92 croak "Unsupported 'template' reference type: " . ref($template) if ref($template) && (ref($template) !~ m/^(?:SCALAR|SL::Presenter::EscapedText)$/);
94 # If all output is turned off then don't output the header either.
95 if (!$options->{output}) {
96 $options->{header} = 0;
97 $options->{layout} = 0;
100 # Layout only makes sense if we're outputting HTML.
101 $options->{layout} = 0 if $options->{type} ne 'html';
104 # Let the presenter do the rest of the work.
107 local $::form->{title} = $locals{title} if $locals{title};
108 $output = $self->presenter->render(
110 { type => $options->{type}, process => $options->{process} },
116 if ($options->{header}) {
117 # Output the HTTP response and the layout in case of HTML output.
119 if ($options->{layout}) {
120 $::form->{title} = $locals{title} if $locals{title};
124 # No layout: just the standard HTTP response. Also notify
125 # $::form that the header has already been output so that
126 # $::form->header() won't output it again.
127 $::form->{header} = 1;
128 my $content_type = $options->{type} eq 'html' ? 'text/html'
129 : $options->{type} eq 'js' ? 'text/javascript'
130 : $options->{type} eq 'text' ? 'text/plain'
131 : 'application/json';
133 print $::form->create_http_response(content_type => $content_type,
138 # Print the output if wanted.
139 print $output if $options->{output};
145 my ($self, $file_name_or_content, %params) = @_;
149 if (!ref $file_name_or_content) {
150 $file = IO::File->new($file_name_or_content, 'r') || croak("Cannot open file '${file_name_or_content}'");
151 $size = -s $file_name_or_content;
153 $size = length $$file_name_or_content;
156 my $content_type = $params{type} || 'application/octet_stream';
157 my $attachment_name = $params{name} || (!ref($file_name_or_content) ? $file_name_or_content : '');
158 $attachment_name =~ s:.*//::g;
160 if ($::request->is_ajax || $params{ajax}) {
161 my $octets = ref $file_name_or_content ? $file_name_or_content : \ do { local $/ = undef; <$file> };
162 $self->js->save_file(MIME::Base64::encode_base64($$octets), $content_type, $size, $attachment_name)->render;
164 print $::form->create_http_response(content_type => $content_type,
165 content_disposition => 'attachment; filename="' . $attachment_name . '"',
166 content_length => $size);
168 if (!ref $file_name_or_content) {
169 $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
171 unlink $file_name_or_content if $params{unlink};
173 $::locale->with_raw_io(\*STDOUT, sub { print $$file_name_or_content });
181 return SL::Presenter->get;
184 sub controller_name {
185 my $class = ref($_[0]) || $_[0];
186 $class =~ s/^SL::Controller:://;
191 SL::ClientJS->new(controller => $_[0])
195 # Before/after run hooks
199 _add_hook('before', @_);
203 _add_hook('after', @_);
209 my ($when, $class, $sub, %params) = @_;
211 foreach my $key (qw(only except)) {
212 $params{$key} = { map { ( $_ => 1 ) } @{ $params{$key} } } if $params{$key};
215 my $idx = "${when}/${class}";
216 $hooks{$idx} ||= [ ];
217 push @{ $hooks{$idx} }, { %params, code => $sub };
221 my ($self, $when, $action) = @_;
223 my $idx = "${when}/" . ref($self);
225 foreach my $hook (@{ $hooks{$idx} || [] }) {
226 next if ($hook->{only } && !$hook->{only }->{$action})
227 || ($hook->{except} && $hook->{except}->{$action});
229 if (ref($hook->{code}) eq 'CODE') {
230 $hook->{code}->($self, $action);
232 my $sub = $hook->{code};
233 $self->$sub($action);
239 # behaviour. override these
242 sub delay_flash_on_redirect {
247 # Ignore the 'action' parameter.
251 sub keep_auth_vars_in_form {
256 # private functions -- for use in Base only
262 my $sub = "action_${action}";
264 return $self->_dispatch(@_) if $action eq 'dispatch';
266 $::form->error("Invalid action '${action}' for controller " . ref($self)) if !$self->can($sub);
268 $self->action_name($action);
269 $self->_run_hooks('before', $action);
271 $self->_run_hooks('after', $action);
278 my @actions = map { s/^action_//; $_ } grep { m/^action_/ } keys %{ ref($self) . "::" };
279 my $action = first { $::form->{"action_${_}"} } @actions;
280 my $sub = "action_${action}";
282 if ($self->can($sub)) {
283 $self->action_name($action);
284 $self->_run_hooks('before', $action);
286 $self->_run_hooks('after', $action);
288 $::form->error($::locale->text('Oops. No valid action found to dispatch. Please report this case to the kivitendo team.'));
298 SL::Controller::Base - base class for all action controllers
304 This is a base class for all action controllers. Action controllers
305 provide subs that are callable by special URLs.
307 For each request made to the web server an instance of the controller
308 will be created. After the request has been served that instance will
309 handed over to garbage collection.
311 This base class is derived from L<Rose::Object>.
315 The URLs have the following properties:
321 The script part of the URL must be C<controller.pl>.
325 There must be a GET or POST parameter named C<action> containing the
326 name of the controller and the sub to call separated by C</>,
327 e.g. C<Message/list>.
331 The controller name is the package's name without the
332 C<SL::Controller::> prefix. At the moment only packages in the
333 C<SL::Controller> namespace are valid; sub-namespaces are not
334 allowed. The package name must start with an upper-case letter.
338 The sub part of the C<action> parameter is the name of the sub to
339 call. However, the sub's name is automatically prefixed with
340 C<action_>. Therefore for the example C<Message/list> the sub
341 C<SL::DB::Message::action_list> would be called. This in turn means
342 that subs whose name does not start with C<action_> cannot be invoked
343 directly via the URL.
347 =head2 INDIRECT DISPATCHING
349 In the case that there are several submit buttons on a page it is
350 often impractical to have a single C<action> parameter match up
351 properly. For such a case a special dispatcher method is available. In
352 that case the C<action> parameter of the URL must be
353 C<Controller/dispatch>.
355 The C<SL::Controller::Base::_dispatch> method will iterate over all
356 subs in the controller package whose names start with C<action_>. The
357 first one for which there's a GET or POST parameter with the same name
358 and that's trueish is called.
360 Usage from a template usually looks like this:
362 <form method="POST" action="controller.pl">
364 <input type="hidden" name="action" value="Message/dispatch">
365 <input type="submit" name="action_mark_as_read" value="Mark messages as read">
366 <input type="submit" name="action_delete" value="Delete messages">
369 The dispatching is handled by the function L</_dispatch>.
373 Hooks are functions that are called before or after the controller's
374 action is called. The controller package defines the hooks, and those
375 hooks themselves are run as instance methods.
377 Hooks are run in the order they're added.
379 The hooks receive a single parameter: the name of the action that is
380 about to be called (for C<before> hooks) / was called (for C<after>
383 The return value of the hooks is discarded.
385 Hooks can be defined to run for all actions, for only specific actions
386 or for all actions except a list of actions. Each entry is the action
387 name, not the sub's name. Therefore in order to run a hook before one
388 of the subs C<action_edit> or C<action_save> is called the following
391 __PACKAGE__->run_before('things_to_do_before_edit_and_save', only => [ 'edit', 'save' ]);
395 =head2 PUBLIC HELPER FUNCTIONS
397 These functions are supposed to be called by sub-classed controllers.
401 =item C<render $template, [ $options, ] %locals>
403 Renders the template C<$template>. Provides other variables than
404 C<Form::parse_html_template> does.
406 C<$options>, if present, must be a hash reference. All remaining
407 parameters are slurped into C<%locals>.
409 What is rendered and how C<$template> is interpreted is determined
410 both by C<$template>'s reference type and by the supplied options. The
411 actual rendering is handled by L<SL::Presenter/render>.
413 If C<$template> is a normal scalar (not a reference) then it is meant
414 to be a template file name relative to the C<templates/webpages>
415 directory. The file name to use is determined by the C<type> option.
417 If C<$template> is a reference to a scalar then the referenced
418 scalar's content is used as the content to process. The C<type> option
419 is not considered in this case.
421 C<$template> can also be an instance of L<SL::Presenter::EscapedText>
422 or a reference to such an instance. Both of these cases are handled
423 the same way as if C<$template> were a reference to a scalar: its
424 content is processed, and C<type> is not considered.
426 Other reference types, unknown options and unknown arguments to the
427 C<type> option cause the function to L<croak>.
429 The following options are available (defaults: C<type> = 'html',
430 C<process> = 1, C<output> = 1, C<header> = 1, C<layout> = 1):
436 The template type. Can be C<html> (the default), C<js> for JavaScript,
437 C<json> for JSON and C<text> for plain text content. Affects the
438 extension that's added to the file name given with a non-reference
439 C<$template> argument, the content type HTTP header that is output and
440 whether or not the layout will be output as well (see description of
445 If trueish (which is also the default) it causes the template/content
446 to be processed by the Template toolkit. Otherwise the
447 template/content is output as-is.
451 If trueish (the default) then the generated output will be sent to the
452 browser in addition to being returned. If falsish then the options
453 C<header> and C<layout> are set to 0 as well.
457 Determines whether or not to output the HTTP response
458 headers. Defaults to the same value that C<output> is set to. If set
459 to falsish then the layout is not output either.
463 Determines whether or not the basic HTML layout structure should be
464 output (HTML header, common JavaScript and stylesheet inclusions, menu
465 etc.). Defaults to 0 if C<type> is not C<html> and to the same value
466 C<header> is set to otherwise.
470 The template itself has access to several variables. These are listed
471 in the documentation to L<SL::Presenter/render>.
473 The function will always return the output.
475 Example: Render a HTML template with a certain title and a few locals
477 $self->render('todo/list',
478 title => 'List TODO items',
479 TODO_ITEMS => SL::DB::Manager::Todo->get_all_sorted);
481 Example: Render a string and return its content for further processing
482 by the calling function. No header is generated due to C<output>.
484 my $content = $self->render(\'[% USE JavaScript %][% JavaScript.replace_with("#someid", "js/something") %]',
487 Example: Render a JavaScript template
488 "templates/webpages/todo/single_item.js" and send it to the
489 browser. Typical use for actions called via AJAX:
491 $self->render('todo/single_item', { type => 'js' },
492 item => $employee->most_important_todo_item);
494 =item C<send_file $file_name_or_content, [%params]>
496 Sends the file C<$file_name_or_content> to the browser including
497 appropriate HTTP headers for a download. If C<$file_name_or_content>
498 is a scalar then it is interpreted as a file name which is opened and
499 whose content is sent. Otherwise (C<$file_name_or_content> being a
500 reference) the referenced scalar's data itself is sent.
502 C<%params> can include the following:
506 =item * C<type> -- the file's content type; defaults to
507 'application/octet_stream'
509 =item * C<name> -- the name presented to the browser; defaults to
510 C<$file_name>; mandatory if C<$file_name_or_content> is a reference
512 =item * C<unlink> -- if trueish and C<$file_name_or_content> refers to
513 a file name then unlink the file after it has been sent to the browser
514 (e.g. for temporary files)
518 =item C<url_for $url>
520 =item C<url_for $params>
522 =item C<url_for %params>
524 Creates an URL for the given parameters suitable for calling an action
525 controller. If there's only one scalar parameter then it is returned
528 Otherwise the parameters are given either as a single hash ref
529 parameter or as a normal hash.
531 The controller to call is given by C<$params{controller}>. It defaults
532 to the current controller as returned by
535 The action to call is given by C<$params{action}>. It defaults to
538 If C<$params{fragment}> is present, it's used as the fragment of the resulting
541 All other key/value pairs in C<%params> are appended as GET parameters
544 Usage from a template might look like this:
546 <a href="[% SELF.url_for(controller => 'Message', action => 'new', recipient_id => 42) %]">create new message</a>
548 =item C<redirect_to %url_params>
550 Redirects the browser to a new URL. The URL is generated by calling
551 L</url_for> with C<%url_params>.
553 This function implements the redirection depending on whether or not
554 the current request is an AJAX request as determined by
555 L<SL::Request/is_ajax>. If it is a normal request then it outputs a
556 standard HTTP redirect header (HTTP code 302). If it is an AJAX
557 request then it outputs an AJAX response suitable for the
558 C<kivi.eval_json_result> function from the L<SL::ClientJS> module.
560 =item C<run_before $sub, %params>
562 =item C<run_after $sub, %params>
564 Adds a hook to run before or after certain actions are run for the
565 current package. The code to run is C<$sub> which is either the name
566 of an instance method or a code reference. If it's the latter then the
567 first parameter will be C<$self>.
569 C<%params> can contain two possible values that restrict the code to
570 be run only for certain actions:
574 =item C<< only => \@list >>
576 Only run the code for actions given in C<@list>. The entries are the
577 action names, not the names of the sub (so it's C<list> instead of
580 =item C<< except => \@list >>
582 Run the code for all actions but for those given in C<@list>. The
583 entries are the action names, not the names of the sub (so it's
584 C<list> instead of C<action_list>).
588 If neither restriction is used then the code will be run for any
591 The hook's return values are discarded.
593 =item C<delay_flash_on_redirect>
595 May be overridden by a controller. If this method returns true, redirect_to
596 will delay all flash messages for the current request. Defaults to false for
597 compatibility reasons.
599 =item C<get_auth_level $action>
601 May be overridden by a controller. Determines what kind of
602 authentication is required for a particular action. Must return either
603 C<admin> (which means that authentication as an admin is required),
604 C<user> (authentication as a normal user suffices) with a possible
605 future value C<none> (which would require no authentication but is not
608 =item C<keep_auth_vars_in_form %params>
610 May be overridden by a controller. If falsish (the default) all form
611 variables whose name starts with C<{AUTH}> are removed before the
612 request is routed. Only controllers that handle login requests
613 themselves should return trueish for this function.
615 C<$params{action}> contains the action name that the request will be
618 =item C<controller_name>
620 Returns the name of the curernt controller package without the
621 C<SL::Controller::> prefix. This method can be called both as a class
622 method and an instance method.
626 Returns the name of the currently executing action. If the dispatcher
627 mechanism was used then this is not C<dispatch> but the actual method
628 name the dispatching resolved to.
632 Returns the global presenter object by calling
633 L<SL::Presenter/get>.
637 Returns an L<SL::ClientJS> instance for this controller.
641 =head2 PRIVATE FUNCTIONS
643 These functions are supposed to be used from this base class only.
649 Implements the method lookup for indirect dispatching mentioned in the
650 section L</INDIRECT DISPATCHING>.
652 =item C<_run_action $action>
654 Executes a sub based on the value of C<$action>. C<$action> is the sub
655 name part of the C<action> GET or POST parameter as described in
658 If C<$action> equals C<dispatch> then the sub L</_dispatch> in this
659 base class is called for L</INDIRECT DISPATCHING>. Otherwise
660 C<$action> is prefixed with C<action_>, and that sub is called on the
661 current controller instance.
667 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>