Module: Rlastfm::Helpers::RemoteAccessor

Included in:
Artist
Defined in:
lib/rlastfm/helpers/remote_accessor.rb

Instance Method Summary collapse

Instance Method Details

#add_mapped_reader(mapping) ⇒ Object 



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# File 'lib/rlastfm/helpers/remote_accessor.rb', line 17

def add_mapped_reader(mapping)
  remote_reader_name = mapping.delete(:from)
  reader_name        = mapping.delete(:to)
  raise "remote_accessor_mapping requires :from and :to arguments" unless remote_reader_name && reader_name

  add_reader reader_name, remote_reader_name
end

#add_reader(reader_name, remote_reader_name = nil) ⇒ Object 



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# File 'lib/rlastfm/helpers/remote_accessor.rb', line 25

def add_reader(reader_name, remote_reader_name=nil)
  remote_reader_name ||= reader_name
  define_method reader_name do
    raw[remote_reader_name.to_s]
  end

  memoize_method reader_name
end

#memoize_method(method_name) ⇒ Object 



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# File 'lib/rlastfm/helpers/remote_accessor.rb', line 34

def memoize_method(method_name)
  i_var_name = :"@#{method_name}"
  method_without = :"#{method_name}_without_memoization"
  method_with = :"#{method_name}_with_memoization"

  class_eval do
    define_method method_with do
      instance_variable_get(i_var_name) || instance_variable_set(i_var_name, send(method_without))
    end
    alias_method method_without, method_name
    alias_method method_name, method_with
  end
end

#remote_reader(*accessors) ⇒ Object 



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# File 'lib/rlastfm/helpers/remote_accessor.rb', line 4

def remote_reader(*accessors)
  accessors.each do |reader|
    case reader
    when Symbol
      add_reader reader
    when Hash
      add_mapped_reader reader
    else
      raise "remote_reader requires a Hash or Symbol"
    end
  end
end