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require "abstract_controller/base"
require "active_support/core_ext/array/wrap"
module AbstractController
class DoubleRenderError < Error
DEFAULT_MESSAGE = "Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like \"redirect_to(...) and return\"."
def initialize(message = nil)
super(message || DEFAULT_MESSAGE)
end
end
module ViewPaths
extend ActiveSupport::Concern
included do
class_attribute :_view_paths
self._view_paths = ActionView::PathSet.new
end
delegate :formats, :formats=, :to => :template_lookup
delegate :_view_paths, :to => :'self.class'
def template_lookup
@template_lookup ||= ActionView::Template::Lookup.new(_view_paths, details_for_lookup)
end
def details_for_lookup
{ }
end
# The list of view paths for this controller. See ActionView::ViewPathSet for
# more details about writing custom view paths.
def view_paths
template_lookup.view_paths
end
def append_view_path(path)
template_lookup.view_paths.push(*path)
end
def prepend_view_path(path)
template_lookup.view_paths.unshift(*path)
end
protected
def template_exists?(*args)
template_lookup.exists?(*args)
end
def find_template(*args)
template_lookup.find(*args)
end
module ClassMethods
# Append a path to the list of view paths for this controller.
#
# ==== Parameters
# path<String, ViewPath>:: If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::ViewPathSet for more information)
def append_view_path(path)
self.view_paths = view_paths.dup + Array(path)
end
# Prepend a path to the list of view paths for this controller.
#
# ==== Parameters
# path<String, ViewPath>:: If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::ViewPathSet for more information)
def prepend_view_path(path)
self.view_paths = Array(path) + view_paths.dup
end
# A list of all of the default view paths for this controller.
def view_paths
_view_paths
end
# Set the view paths.
#
# ==== Parameters
# paths<ViewPathSet, Object>:: If a ViewPathSet is provided, use that;
# otherwise, process the parameter into a ViewPathSet.
def view_paths=(paths)
self._view_paths = paths.is_a?(ActionView::PathSet) ? paths : ActionView::Base.process_view_paths(paths)
self._view_paths.freeze
end
end
end
module Rendering
extend ActiveSupport::Concern
include AbstractController::ViewPaths
# An instance of a view class. The default view class is ActionView::Base
#
# The view class must have the following methods:
# View.for_controller[controller]
# Create a new ActionView instance for a controller
# View#render_template[options]
# Returns String with the rendered template
#
# Override this method in a module to change the default behavior.
def view_context
@_view_context ||= ActionView::Base.for_controller(self)
end
# Mostly abstracts the fact that calling render twice is a DoubleRenderError.
# Delegates render_to_body and sticks the result in self.response_body.
def render(*args, &block)
options = _normalize_args(*args, &block)
_normalize_options(options)
self.response_body = render_to_body(options)
end
# Raw rendering of a template to a Rack-compatible body.
# :api: plugin
def render_to_body(options = {})
_process_options(options)
_render_template(options)
end
# Raw rendering of a template to a string. Just convert the results of
# render_to_body into a String.
# :api: plugin
def render_to_string(options={})
_normalize_options(options)
AbstractController::Rendering.body_to_s(render_to_body(options))
end
# Find and renders a template based on the options given.
def _render_template(options)
view_context.render_template(options) { |template| _with_template_hook(template) }
end
# The prefix used in render "foo" shortcuts.
def _prefix
controller_path
end
# Return a string representation of a Rack-compatible response body.
def self.body_to_s(body)
if body.respond_to?(:to_str)
body
else
strings = []
body.each { |part| strings << part.to_s }
body.close if body.respond_to?(:close)
strings.join
end
end
private
# Normalize options, by converting render "foo" to render :template => "prefix/foo"
# and render "/foo" to render :file => "/foo".
def _normalize_args(action=nil, options={})
case action
when NilClass
when Hash
options, action = action, nil
when String, Symbol
action = action.to_s
case action.index("/")
when NilClass
options[:action] = action
when 0
options[:file] = action
else
options[:template] = action
end
else
options.merge!(:partial => action)
end
options
end
def _normalize_options(options)
if options[:partial] == true
options[:partial] = action_name
end
if (options.keys & [:partial, :file, :template]).empty?
options[:_prefix] ||= _prefix
end
options[:template] ||= (options[:action] || action_name).to_s
details = _normalize_details(options)
template_lookup.details = details
options
end
def _normalize_details(options)
details = template_lookup.details
details[:formats] = Array(options[:format]) if options[:format]
details[:locale] = Array(options[:locale]) if options[:locale]
details
end
def _process_options(options)
end
def _with_template_hook(template)
self.formats = template.details[:formats]
end
end
end
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