Class: ThumbnailSpec

Inherits:
Object
  • Object
show all
Defined in:
lib/httpthumbnailer/thumbnail_specs.rb

Defined Under Namespace

Classes: EditSpec, InvalidArgumentValueError, InvalidFormatError, MissingArgumentError, MissingOptionKeyNameError, MissingOptionKeyValueError, MissingOptionKeyValuePairError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

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

Returns a new instance of ThumbnailSpec.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 115

def initialize(method, width, height, format, options = {}, edits = [])
	method.nil? or method.empty? and raise MissingArgumentError, 'method'
	width.nil? or width.empty? and raise MissingArgumentError, 'width'
	height.nil? or height.empty? and raise MissingArgumentError, 'height'
	format.nil? or format.empty? and raise MissingArgumentError, 'format'

	width !~ /^([0-9]+|input)$/ and raise InvalidArgumentValueError.new('width', width, "an integer or 'input'")
	height !~ /^([0-9]+|input)$/ and raise InvalidArgumentValueError.new('height', height, "an integer or 'input'")

	width = width == 'input' ? :input : width.to_i
	height = height == 'input' ? :input : height.to_i

	format = format == 'input' ? :input : format.upcase

	@method = method
	@width = width
	@height = height
	@format = format
	@options = options
	@edits = edits
end

Instance Attribute Details

#edits ⇒ Object (readonly)

Returns the value of attribute edits.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def edits
  @edits
end

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def format
  @format
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def height
  @height
end

#method ⇒ Object (readonly)

Returns the value of attribute method.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def method
  @method
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def options
  @options
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 99

def width
  @width
end

Class Method Details

.from_string(string) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 101

def self.from_string(string)
	edits = split_edits(string)
	spec = edits.shift
	args = split_args(spec)
	method, width, height, format, *options = *args

	options = parse_options(options)
	edits = edits.map{|e| EditSpec.from_string(e)}

	new(method, width, height, format, options, edits)
rescue InvalidFormatError => error
	raise error.in_spec(string)
end

.options_to_s(options) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 167

def self.options_to_s(options)
	options.sort_by{|k,v| k}.map do |key, value|
		raise MissingOptionKeyNameError, value if key.nil? or key.to_s.empty?
		raise MissingOptionKeyValueError, key if value.nil? or value.to_s.empty?
		key = key.to_s.gsub('_', '-') if key.kind_of? Symbol
		"#{key}:#{value}"
	end
end

.parse_options(options) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 155

def self.parse_options(options)
	Hash[options.map.with_index do |pair, index|
		pair.empty? and raise MissingOptionKeyValuePairError, index
		pair.split(':', 2)
	end].tap do |map|
		map.each do |key, value|
			key.nil? or key.empty? and raise MissingOptionKeyNameError, value
			value.nil? or value.empty? and raise MissingOptionKeyValueError, key
		end
	end
end

.partition_args_options(args) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 149

def self.partition_args_options(args)
	options = args.drop_while{|a| not a.include?(':')}
	args = args.take_while{|a| not a.include?(':')}
	[args, options]
end

.split_args(string) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 145

def self.split_args(string)
	string.split(',')
end

.split_edits(string) ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 141

def self.split_edits(string)
	string.split('!')
end

Instance Method Details

#to_s ⇒ Object 



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# File 'lib/httpthumbnailer/thumbnail_specs.rb', line 137

def to_s
	[[@method, @width, @height, @format, *self.class.options_to_s(@options)].join(','), *@edits.map(&:to_s)].join('!')
end