Class: Izzle::HasEasy::Configurator

Inherits:
Object
  • Object
show all
Defined in:
lib/has_easy/configurator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, name, options) ⇒ Configurator

Returns a new instance of Configurator.



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# File 'lib/has_easy/configurator.rb', line 7

def initialize(klass, name, options)
  @klass = klass
  @name = name
  @definitions = {}
  
  @aliases = []
  if options.has_key?(:aliases)
    @aliases = options[:aliases]
  elsif options.has_key?(:alias)
    @aliases = [options[:alias]]
  end
  @aliases = @aliases.collect{ |a| a.to_s }
end

Instance Attribute Details

#aliases ⇒ Object

Returns the value of attribute aliases.



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# File 'lib/has_easy/configurator.rb', line 5

def aliases
  @aliases
end

#definitions ⇒ Object

Returns the value of attribute definitions.



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# File 'lib/has_easy/configurator.rb', line 5

def definitions
  @definitions
end

Instance Method Details

#define(name, options = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/has_easy/configurator.rb', line 21

def define(name, options = {})
  name = Helpers.normalize(name)
  raise ArgumentError, "class #{@klass} has_easy('#{@name}') already defines '#{name}'" if @definitions.has_key?(name)
  @definitions[name] = Definition.new(name, options)
end

#do_metaprogramming_magic_aka_define_methods ⇒ Object 



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# File 'lib/has_easy/configurator.rb', line 27

def do_metaprogramming_magic_aka_define_methods
  
  easy_accessors, object_accessors = [], []
  @definitions.values.each do |definition|
    
    easy_accessors << <<-end_eval
      def #{@name}_#{definition.name}=(value)
        set_has_easy_thing('#{@name}', '#{definition.name}', value, true)
      end
      def #{@name}_#{definition.name}
        get_has_easy_thing('#{@name}', '#{definition.name}', true)
      end
      def #{@name}_#{definition.name}?
        !!get_has_easy_thing('#{@name}', '#{definition.name}', true)
      end
    end_eval
    
    object_accessors << <<-end_eval
      def #{definition.name}=(value)
        proxy_association.owner.set_has_easy_thing('#{@name}', '#{definition.name}', value)
      end
      def #{definition.name}
        proxy_association.owner.get_has_easy_thing('#{@name}', '#{definition.name}')
      end
      def #{definition.name}?
        !!proxy_association.owner.get_has_easy_thing('#{@name}', '#{definition.name}')
      end
    end_eval
  end
  
  method_aliases = @aliases.inject([]) do |memo, alias_name|
    memo << "alias_method :#{alias_name}, :#{@name}"
    @definitions.values.each do |definition|
      memo << "alias_method :#{alias_name}_#{definition.name}=, :#{@name}_#{definition.name}="
      memo << "alias_method :#{alias_name}_#{definition.name},  :#{@name}_#{definition.name}"
      memo << "alias_method :#{alias_name}_#{definition.name}?, :#{@name}_#{definition.name}?"
    end
    memo
  end
  
  @klass.class_eval <<-end_eval
    # first define the has many relationship
    has_many :#{@name}, :class_name => 'HasEasyThing',
                        :as => :model,
                        :extend => AssocationExtension,
                        :dependent => :destroy do
      #{object_accessors.join("\n")}
    end
    
    # now define the easy accessors
    #{easy_accessors.join("\n")}
    
    # define the aliases
    #{method_aliases.join("\n")}
  end_eval
  
end