Class: Configuration::Thumbnail::ThumbnailSpec

Inherits:
HandlerStatement show all
Includes:
ConditionalInclusion, ImageName, LocalConfiguration
Defined in:
lib/httpimagestore/configuration/thumbnailer.rb

Defined Under Namespace

Classes: EditSpec

Instance Method Summary collapse

Methods inherited from Scope

node_parsers, #parse, register_node_parser

Constructor Details

#initialize(image_name, method, width, height, format, options = {}, edits = []) ⇒ ThumbnailSpec

Returns a new instance of ThumbnailSpec.



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# File 'lib/httpimagestore/configuration/thumbnailer.rb', line 125

def initialize(image_name, method, width, height, format, options = {}, edits = [])
	with_image_name(image_name)
	@method = method.to_template.with_missing_resolver{|locals, key| raise NoValueForSpecTemplatePlaceholderError.new(image_name, 'method', key, method)}
	@width =  width.to_s.to_template.with_missing_resolver{|locals, key| raise NoValueForSpecTemplatePlaceholderError.new(image_name, 'width', key, width)}
	@height = height.to_s.to_template.with_missing_resolver{|locals, key| raise NoValueForSpecTemplatePlaceholderError.new(image_name, 'height', key, height)}
	@format = format.to_template.with_missing_resolver{|locals, key| raise NoValueForSpecTemplatePlaceholderError.new(image_name, 'format', key, format)}

	@options = options.merge(options) do |option, old, template|
		template.to_s.to_template.with_missing_resolver{|locals, field| raise NoValueForSpecTemplatePlaceholderError.new(image_name, option, field, template)}
	end

	@edits = edits
end

Instance Method Details

#render(request_state = {}) ⇒ Object 



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# File 'lib/httpimagestore/configuration/thumbnailer.rb', line 139

def render(request_state = {})
	options = @options.inject({}){|h, v| h[v.first] = v.last.render(request_state); h}

	# NOTE: normally options will be passed as options=String; but may be supplied each by each as in the configuration with key=value pairs
	nested_options = begin
		opts = options.delete('options') || ''
		HTTPThumbnailerClient::ThumbnailSpec.parse_options(HTTPThumbnailerClient::ThumbnailSpec.split_args(opts))
	rescue HTTPThumbnailerClient::ThumbnailSpec::InvalidFormatError => error
		raise InvalidOptionsSpecError.new(image_name, opts, error)
	end

	edits_option = HTTPThumbnailerClient::ThumbnailSpec.split_edits(options.delete('edits') || '').map do |edit|
		begin
			HTTPThumbnailerClient::ThumbnailSpec::EditSpec.from_string(edit)
		rescue HTTPThumbnailerClient::ThumbnailSpec::InvalidFormatError => error
			raise InvalidEditsSpecError.new(image_name, edit, error)
		end
	end

	edits = @edits.select do |edit|
		edit.included?(request_state)
	end.map do |edit|
		edit.render(request_state)
	end

	spec = begin
		HTTPThumbnailerClient::ThumbnailSpec.new(
			@method.render(request_state),
			@width.render(request_state),
			@height.render(request_state),
			@format.render(request_state),
			nested_options.merge(options),
			edits | edits_option
		)
	rescue HTTPThumbnailerClient::ThumbnailSpec::InvalidFormatError => error
		raise InvalidSpecError.new(image_name, error)
	end

	Struct.new(:name, :spec).new(image_name, spec)
end