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module Fog
module Attributes
# = Fog Default Attribute
#
# This class handles the attributes without a type force.
# The attributes returned from the provider will keep its original values.
class Default
attr_reader :model, :name, :squash, :aliases, :default, :as
# @param [Klass] model model class
# @param [Symbol] name name of the attribute
# @param [Hash] options attribute options
# @option options [Symbol] :squash
# @option options [::Array] :aliases
# @option options [Object] :default
# @option options [Object] :as
def initialize(model, name, options)
@model = model
@model.attributes << name
@name = name
@squash = options.fetch(:squash, false)
@aliases = options.fetch(:aliases, [])
@default = options[:default]
@as = options.fetch(:as, name)
create_setter
create_getter
create_aliases
set_defaults
create_mask
end
def create_setter
if squash
model.class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_data)
if new_data.is_a?(Hash)
if new_data.has_key?(:'#{squash}')
attributes[:#{name}] = new_data[:'#{squash}']
elsif new_data.has_key?("#{squash}")
attributes[:#{name}] = new_data["#{squash}"]
else
attributes[:#{name}] = [ new_data ]
end
else
attributes[:#{name}] = new_data
end
end
EOS
else
model.class_eval <<-EOS, __FILE__, __LINE__
def #{name}=(new_#{name})
attributes[:#{name}] = new_#{name}
end
EOS
end
end
def create_getter
model.class_eval <<-EOS, __FILE__, __LINE__
def #{name}
return attributes[:#{name}] unless attributes[:#{name}].nil?
if !attributes.key?(:#{name}) && !self.class.default_values[:#{name}].nil? && !persisted?
return self.class.default_values[:#{name}]
end
attributes[:#{name}]
end
EOS
end
def create_aliases
Array(aliases).each do |alias_name|
model.aliases[alias_name] = name
end
end
def set_defaults
model.default_values[name] = default unless default.nil?
end
def create_mask
model.masks[name] = as
end
end
end
end
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