require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/module/delegation' require 'json' module ActiveSupport # Look for and parse json strings that look like ISO 8601 times. mattr_accessor :parse_json_times module JSON # matches YAML-formatted dates DATE_REGEX = /^\d{4}-\d{2}-\d{2}$/ DATETIME_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[T \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?)?)$/ class << self # Parses a JSON string (JavaScript Object Notation) into a hash. # See http://www.json.org for more info. # # ActiveSupport::JSON.decode("{\"team\":\"rails\",\"players\":\"36\"}") # => {"team" => "rails", "players" => "36"} def decode(json) data = ::JSON.parse(json, quirks_mode: true) if ActiveSupport.parse_json_times convert_dates_from(data) else data end end # Returns the class of the error that will be raised when there is an # error in decoding JSON. Using this method means you won't directly # depend on the ActiveSupport's JSON implementation, in case it changes # in the future. # # begin # obj = ActiveSupport::JSON.decode(some_string) # rescue ActiveSupport::JSON.parse_error # Rails.logger.warn("Attempted to decode invalid JSON: #{some_string}") # end def parse_error ::JSON::ParserError end private def convert_dates_from(data) case data when nil nil when DATE_REGEX begin Date.parse(data) rescue ArgumentError data end when DATETIME_REGEX begin Time.zone.parse(data) rescue ArgumentError data end when Array data.map! { |d| convert_dates_from(d) } when Hash data.each do |key, value| data[key] = convert_dates_from(value) end else data end end end end end