class PgSearch::Scope

def build_options_proc(scope_options_or_proc)
  case scope_options_or_proc
    when Proc
      scope_options_or_proc
    when Hash
      lambda { |query|
        scope_options_or_proc.reverse_merge(:query => query)
      }
    else
      raise ArgumentError, "A PgSearch scope expects a Proc or Hash for its options"
  end
end

def initialize(name, model, scope_options_or_proc)
  @name = name
  @model = model
  @options_proc = build_options_proc(scope_options_or_proc)
end

def to_proc
  lambda { |*args|
    config = Configuration.new(@options_proc.call(*args), @model)
    ScopeOptions.new(@name, @model, config).to_relation
  }
end