erb context

erb_context.rb

class ErbContext
  def initialize params
    @params = params
  end

  def method_missing name, *args
    if @params.has_key? name
      @params[name]
    else
      raise "unknown key (#{name})"
    end
  end

  def get_binding
    binding
  end

  def self.hash_to_binding params
    ErbContext.new(params).get_binding
  end
end

def render template, params
  erb = ERB.new(template)
  erb.result ErbContext.hash_to_binding(params)
end