Class: Sunshine::Binder

Inherits:
Object
  • Object
show all
Defined in:
lib/sunshine/binder.rb

Overview

Create a selective binding. Useful for controlling ERB builds:

binder.set :server_name, "blah.com"
binder.forward :server_method, ...
binder.get_binding

Instance Method Summary collapse

Constructor Details

#initialize(target) ⇒ Binder

Returns a new instance of Binder.



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# File 'lib/sunshine/binder.rb', line 11

def initialize target
  @target = target
end

Instance Method Details

#forward(*method_names) ⇒ Object

Forward a method to the server instance.



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# File 'lib/sunshine/binder.rb', line 50

def forward *method_names
  method_names.each do |method_name|
    instance_eval <<-STR, __FILE__, __LINE__ + 1
    undef #{method_name} if defined?(#{method_name})
    def #{method_name}(*args, &block)
      @target.#{method_name}(*args, &block)
    end
    STR
  end
end

#get_binding ⇒ Object

Retrieve the object’s binding.



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# File 'lib/sunshine/binder.rb', line 65

def get_binding
  binding
end

#import_hash(hash) ⇒ Object

Takes a hash and assign each hash key/value as an attribute.



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# File 'lib/sunshine/binder.rb', line 42

def import_hash hash
  hash.each{|k, v| self.set(k, v)}
end

#set(key, value = nil, &block) ⇒ Object

Set the binding instance variable and accessor method.



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# File 'lib/sunshine/binder.rb', line 19

def set key, value=nil, &block
  value ||= block if block_given?

  instance_variable_set("@#{key}", value)

  eval_str = <<-STR
    undef #{key} if defined?(#{key})
    def #{key}(*args)
      if Proc === @#{key}
        @#{key}.call(*args)
      else
        @#{key}
      end
    end
  STR

  instance_eval eval_str, __FILE__, __LINE__ + 1
end