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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
module Elasticsearch
module DSL
module Search
# Wraps the `sort` part of a search definition
#
# @see https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html
#
class Sort
include BaseComponent
def initialize(*args, &block)
@value ||= []
super
end
# DSL method to specify sorting item
#
# @example
#
# search do
# sort do
# by :category
# by :clicks, order: 'desc'
# end
# end
#
def by(name, direction=nil)
@value << ( direction ? { name => direction } : name )
self
end
# Convert the definition to a Hash
#
# @return [Hash]
#
def to_hash
if @block
call unless @block_called
@block_called = true
else
@value << @args if @args && !@args.empty? && ! @value.include?(@args)
end
@hash = @value.flatten
@hash
end
# Return whether the definition is empty
#
# @return [Boolean]
#
def empty?
to_hash.empty?
end
end
end
end
end
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