lib/paid/api_resource.rb
module Paid
class APIResource
class << self
# The default :id method is deprecated and isn't useful to us
if method_defined?(:id)
undef :id
end
end
# The default :id method is deprecated and isn't useful to us
if method_defined?(:id)
undef :id
end
attr_reader :api_method
attr_reader :json
def initialize(json=nil, api_method=nil)
refresh_from(json)
end
def refresh_from(json={}, api_method=nil)
unless json.is_a?(Hash)
json = { :id => json }
end
json = Util.symbolize_keys(json)
# Clear or write over any old data
clear_api_attributes
@api_method = api_method
@json = Util.sorta_deep_clone(json)
# Use json (not @json, the cloned copy)
json.each do |k, v|
unless self.class.api_attribute_names.include?(k.to_sym)
self.class.add_api_attribute(k.to_sym)
end
instance_variable_set("@#{k}", determine_api_attribute_value(k, v))
end
self
end
def inspect
id_string = (self.respond_to?(:id) && !self.id.nil?) ? " id=#{self.id}" : ""
"#<#{self.class}:0x#{self.object_id.to_s(16)}#{id_string}> Attributes: " + JSON.pretty_generate(inspect_api_attributes)
end
def inspect_nested
id_string = (self.respond_to?(:id) && !self.id.nil?) ? " id=#{self.id}" : ""
"#<#{self.class}:0x#{self.object_id.to_s(16)}#{id_string}>"
end
def to_json(*args)
JSON.generate(api_attributes)
end
def self.api_attribute_names
@api_attributes.map(&:first)
end
def self.add_api_attribute(name)
if method_defined?(name)
remove_method(name)
end
if method_defined?("#{name}=")
remove_method("#{name}=")
end
attr_accessor name.to_sym
@api_attributes[name.to_sym] = {}
end
def api_attributes
ret = {}
self.class.api_attribute_names.each do |attribute|
ret[attribute] = self.send(attribute)
end
ret
end
def inspect_api_attributes
ret = {}
api_attributes.each do |k, v|
if v.is_a?(APIResource)
ret[k] = v.inspect_nested
else
ret[k] = v
end
end
ret
end
# TODO(joncalhoun): Make this work for nested class construction.
def changed_api_attributes
ret = {}
self.api_attributes.each do |name, value|
if @json[name] != value
ret[name] = value
end
end
ret
end
def clear_api_attributes
self.class.api_attribute_names.each do |name|
instance_variable_set("@#{name}", nil)
end
end
def self.determine_api_attribute_value(name, raw_value)
if @api_attributes[name] && @api_attributes[name].has_key?(:constructor)
klass = Util.constantize(@api_attributes[name][:constructor])
if(klass.respond_to?(:construct))
klass.construct(raw_value)
else
klass.new(raw_value)
end
else
raw_value
end
end
def determine_api_attribute_value(name, raw_value)
self.class.determine_api_attribute_value(name, raw_value)
end
def self.api_subclasses
return @api_subclasses ||= Set.new
end
def self.api_subclass_fetch(name)
@api_subclasses_hash ||= {}
if @api_subclasses_hash.has_key?(name)
@api_subclasses_hash[name]
end
end
def self.register_api_subclass(subclass, name=nil)
@api_subclasses ||= Set.new
@api_subclasses << subclass
unless name.nil?
@api_subclasses_hash ||= {}
@api_subclasses_hash[name] = subclass
end
end
@api_attributes = {}
end
end