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Fix rdoc for Filters::ClassMethods

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This commit is contained in:
Jeremy Kemper 2008-07-04 12:51:16 -07:00
parent cb645c8877
commit 271f5b655f
1 changed files with 194 additions and 195 deletions
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389
actionpack/lib/action_controller/filters.rb
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@ -7,6 +7,200 @@ def self.included(base)
end
end
class FilterChain < ActiveSupport::Callbacks::CallbackChain #:nodoc:
def append_filter_to_chain(filters, filter_type, &block)
pos = find_filter_append_position(filters, filter_type)
update_filter_chain(filters, filter_type, pos, &block)
end
def prepend_filter_to_chain(filters, filter_type, &block)
pos = find_filter_prepend_position(filters, filter_type)
update_filter_chain(filters, filter_type, pos, &block)
end
def create_filters(filters, filter_type, &block)
filters, conditions = extract_options(filters, &block)
filters.map! { |filter| find_or_create_filter(filter, filter_type, conditions) }
filters
end
def skip_filter_in_chain(*filters, &test)
filters, conditions = extract_options(filters)
filters.each do |filter|
if callback = find(filter) then delete(callback) end
end if conditions.empty?
update_filter_in_chain(filters, :skip => conditions, &test)
end
private
def update_filter_chain(filters, filter_type, pos, &block)
new_filters = create_filters(filters, filter_type, &block)
insert(pos, new_filters).flatten!
end
def find_filter_append_position(filters, filter_type)
# appending an after filter puts it at the end of the call chain
# before and around filters go before the first after filter in the chain
unless filter_type == :after
each_with_index do |f,i|
return i if f.after?
end
end
return -1
end
def find_filter_prepend_position(filters, filter_type)
# prepending a before or around filter puts it at the front of the call chain
# after filters go before the first after filter in the chain
if filter_type == :after
each_with_index do |f,i|
return i if f.after?
end
return -1
end
return 0
end
def find_or_create_filter(filter, filter_type, options = {})
update_filter_in_chain([filter], options)
if found_filter = find(filter) { |f| f.type == filter_type }
found_filter
else
filter_kind = case
when filter.respond_to?(:before) && filter_type == :before
:before
when filter.respond_to?(:after) && filter_type == :after
:after
else
:filter
end
case filter_type
when :before
BeforeFilter.new(filter_kind, filter, options)
when :after
AfterFilter.new(filter_kind, filter, options)
else
AroundFilter.new(filter_kind, filter, options)
end
end
end
def update_filter_in_chain(filters, options, &test)
filters.map! { |f| block_given? ? find(f, &test) : find(f) }
filters.compact!
map! do |filter|
if filters.include?(filter)
new_filter = filter.dup
new_filter.options.merge!(options)
new_filter
else
filter
end
end
end
end
class Filter < ActiveSupport::Callbacks::Callback #:nodoc:
def before?
self.class == BeforeFilter
end
def after?
self.class == AfterFilter
end
def around?
self.class == AroundFilter
end
private
def should_not_skip?(controller)
if options[:skip]
!included_in_action?(controller, options[:skip])
else
true
end
end
def included_in_action?(controller, options)
if options[:only]
Array(options[:only]).map(&:to_s).include?(controller.action_name)
elsif options[:except]
!Array(options[:except]).map(&:to_s).include?(controller.action_name)
else
true
end
end
def should_run_callback?(controller)
should_not_skip?(controller) && included_in_action?(controller, options) && super
end
end
class AroundFilter < Filter #:nodoc:
def type
:around
end
def call(controller, &block)
if should_run_callback?(controller)
method = filter_responds_to_before_and_after? ? around_proc : self.method
# For around_filter do |controller, action|
if method.is_a?(Proc) && method.arity == 2
evaluate_method(method, controller, block)
else
evaluate_method(method, controller, &block)
end
else
block.call
end
end
private
def filter_responds_to_before_and_after?
method.respond_to?(:before) && method.respond_to?(:after)
end
def around_proc
Proc.new do |controller, action|
method.before(controller)
if controller.send!(:performed?)
controller.send!(:halt_filter_chain, method, :rendered_or_redirected)
else
begin
action.call
ensure
method.after(controller)
end
end
end
end
end
class BeforeFilter < Filter #:nodoc:
def type
:before
end
def call(controller, &block)
super
if controller.send!(:performed?)
controller.send!(:halt_filter_chain, method, :rendered_or_redirected)
end
end
end
class AfterFilter < Filter #:nodoc:
def type
:after
end
end
# Filters enable controllers to run shared pre- and post-processing code for its actions. These filters can be used to do
# authentication, caching, or auditing before the intended action is performed. Or to do localization or output
# compression after the action has been performed. Filters have access to the request, response, and all the instance
@ -245,201 +439,6 @@ def self.included(base)
# filter and controller action will not be run. If +before+ renders or redirects,
# the second half of +around+ and will still run but +after+ and the
# action will not. If +around+ fails to yield, +after+ will not be run.
class FilterChain < ActiveSupport::Callbacks::CallbackChain #:nodoc:
def append_filter_to_chain(filters, filter_type, &block)
pos = find_filter_append_position(filters, filter_type)
update_filter_chain(filters, filter_type, pos, &block)
end
def prepend_filter_to_chain(filters, filter_type, &block)
pos = find_filter_prepend_position(filters, filter_type)
update_filter_chain(filters, filter_type, pos, &block)
end
def create_filters(filters, filter_type, &block)
filters, conditions = extract_options(filters, &block)
filters.map! { |filter| find_or_create_filter(filter, filter_type, conditions) }
filters
end
def skip_filter_in_chain(*filters, &test)
filters, conditions = extract_options(filters)
filters.each do |filter|
if callback = find(filter) then delete(callback) end
end if conditions.empty?
update_filter_in_chain(filters, :skip => conditions, &test)
end
private
def update_filter_chain(filters, filter_type, pos, &block)
new_filters = create_filters(filters, filter_type, &block)
insert(pos, new_filters).flatten!
end
def find_filter_append_position(filters, filter_type)
# appending an after filter puts it at the end of the call chain
# before and around filters go before the first after filter in the chain
unless filter_type == :after
each_with_index do |f,i|
return i if f.after?
end
end
return -1
end
def find_filter_prepend_position(filters, filter_type)
# prepending a before or around filter puts it at the front of the call chain
# after filters go before the first after filter in the chain
if filter_type == :after
each_with_index do |f,i|
return i if f.after?
end
return -1
end
return 0
end
def find_or_create_filter(filter, filter_type, options = {})
update_filter_in_chain([filter], options)
if found_filter = find(filter) { |f| f.type == filter_type }
found_filter
else
filter_kind = case
when filter.respond_to?(:before) && filter_type == :before
:before
when filter.respond_to?(:after) && filter_type == :after
:after
else
:filter
end
case filter_type
when :before
BeforeFilter.new(filter_kind, filter, options)
when :after
AfterFilter.new(filter_kind, filter, options)
else
AroundFilter.new(filter_kind, filter, options)
end
end
end
def update_filter_in_chain(filters, options, &test)
filters.map! { |f| block_given? ? find(f, &test) : find(f) }
filters.compact!
map! do |filter|
if filters.include?(filter)
new_filter = filter.dup
new_filter.options.merge!(options)
new_filter
else
filter
end
end
end
end
class Filter < ActiveSupport::Callbacks::Callback #:nodoc:
def before?
self.class == BeforeFilter
end
def after?
self.class == AfterFilter
end
def around?
self.class == AroundFilter
end
private
def should_not_skip?(controller)
if options[:skip]
!included_in_action?(controller, options[:skip])
else
true
end
end
def included_in_action?(controller, options)
if options[:only]
Array(options[:only]).map(&:to_s).include?(controller.action_name)
elsif options[:except]
!Array(options[:except]).map(&:to_s).include?(controller.action_name)
else
true
end
end
def should_run_callback?(controller)
should_not_skip?(controller) && included_in_action?(controller, options) && super
end
end
class AroundFilter < Filter #:nodoc:
def type
:around
end
def call(controller, &block)
if should_run_callback?(controller)
method = filter_responds_to_before_and_after? ? around_proc : self.method
# For around_filter do |controller, action|
if method.is_a?(Proc) && method.arity == 2
evaluate_method(method, controller, block)
else
evaluate_method(method, controller, &block)
end
else
block.call
end
end
private
def filter_responds_to_before_and_after?
method.respond_to?(:before) && method.respond_to?(:after)
end
def around_proc
Proc.new do |controller, action|
method.before(controller)
if controller.send!(:performed?)
controller.send!(:halt_filter_chain, method, :rendered_or_redirected)
else
begin
action.call
ensure
method.after(controller)
end
end
end
end
end
class BeforeFilter < Filter #:nodoc:
def type
:before
end
def call(controller, &block)
super
if controller.send!(:performed?)
controller.send!(:halt_filter_chain, method, :rendered_or_redirected)
end
end
end
class AfterFilter < Filter #:nodoc:
def type
:after
end
end
module ClassMethods
# The passed <tt>filters</tt> will be appended to the filter_chain and
# will execute before the action on this controller is performed.