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require 'hashie/extensions/deep_locate'
module Hashie
module Extensions
module DeepFind
# Performs a depth-first search on deeply nested data structures for
# a key and returns the first occurrence of the key.
#
# options = {user: {location: {address: '123 Street'}}}
# options.extend(Hashie::Extensions::DeepFind)
# options.deep_find(:address) # => '123 Street'
#
# class MyHash < Hash
# include Hashie::Extensions::DeepFind
# end
#
# my_hash = MyHash.new
# my_hash[:user] = {location: {address: '123 Street'}}
# my_hash.deep_find(:address) # => '123 Street'
def deep_find(key)
_deep_find(key)
end
alias deep_detect deep_find
# Performs a depth-first search on deeply nested data structures for
# a key and returns all occurrences of the key.
#
# options = {
# users: [
# { location: {address: '123 Street'} },
# { location: {address: '234 Street'}}
# ]
# }
# options.extend(Hashie::Extensions::DeepFind)
# options.deep_find_all(:address) # => ['123 Street', '234 Street']
#
# class MyHash < Hash
# include Hashie::Extensions::DeepFind
# end
#
# my_hash = MyHash.new
# my_hash[:users] = [
# {location: {address: '123 Street'}},
# {location: {address: '234 Street'}}
# ]
# my_hash.deep_find_all(:address) # => ['123 Street', '234 Street']
def deep_find_all(key)
matches = _deep_find_all(key)
matches.empty? ? nil : matches
end
alias deep_select deep_find_all
private
def _deep_find(key, object = self)
_deep_find_all(key, object).first
end
def _deep_find_all(key, object = self, matches = [])
deep_locate_result = DeepLocate.deep_locate(key, object).tap do |result|
result.map! { |element| element[key] }
end
matches.concat(deep_locate_result)
end
end
end
end
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