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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
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