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module ActiveModel

  # == Active \Model Basic \Model
  #
  # Includes the required interface for an object to interact with
  # <tt>ActionPack</tt>, using different <tt>ActiveModel</tt> modules.
  # It includes model name introspections, conversions, translations and
  # validations. Besides that, it allows you to initialize the object with a
  # hash of attributes, pretty much like <tt>ActiveRecord</tt> does.
  #
  # A minimal implementation could be:
  #
  # class Person
  # include ActiveModel::Model
  # attr_accessor :name, :age
  # end
  #
  # person = Person.new(name: 'bob', age: '18')
  # person.name # => 'bob'
  # person.age # => 18
  #
  # Note that, by default, <tt>ActiveModel::Model</tt> implements <tt>persisted?</tt>
  # to return +false+, which is the most common case. You may want to override
  # it in your class to simulate a different scenario:
  #
  # class Person
  # include ActiveModel::Model
  # attr_accessor :id, :name
  #
  # def persisted?
  # self.id == 1
  # end
  # end
  #
  # person = Person.new(id: 1, name: 'bob')
  # person.persisted? # => true
  #
  # Also, if for some reason you need to run code on <tt>initialize</tt>, make
  # sure you call +super+ if you want the attributes hash initialization to
  # happen.
  #
  # class Person
  # include ActiveModel::Model
  # attr_accessor :id, :name, :omg
  #
  # def initialize(attributes={})
  # super
  # @omg ||= true
  # end
  # end
  #
  # person = Person.new(id: 1, name: 'bob')
  # person.omg # => true
  #
  # For more detailed information on other functionalities available, please
  # refer to the specific modules included in <tt>ActiveModel::Model</tt>
  # (see below).
  module Model
    def self.included(base) #:nodoc:
      base.class_eval do
        extend ActiveModel::Naming
        extend ActiveModel::Translation
        include ActiveModel::Validations
        include ActiveModel::Conversion
      end
    end

    # Initializes a new model with the given +params+.
    #
    # class Person
    # include ActiveModel::Model
    # attr_accessor :name, :age
    # end
    #
    # person = Person.new(name: 'bob', age: '18')
    # person.name # => "bob"
    # person.age # => 18
    def initialize(params={})
      params.each do |attr, value|
        self.public_send("#{attr}=", value)
      end if params

      super()
    end

    # Indicates if the model is persisted. Default is +false+.
    #
    # class Person
    # include ActiveModel::Model
    # attr_accessor :id, :name
    # end
    #
    # person = Person.new(id: 1, name: 'bob')
    # person.persisted? # => false
    def persisted?
      false
    end
  end
end
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