JezK

Edit File: mimic.rb

require 'bigdecimal'
begin
  require 'ostruct'
rescue Exception
  # ignore
end

module Oj

##
  # Custom mode can be used to emulate the compat mode with some minor
  # differences. These are the options that setup the custom mode to be like
  # the compat mode.
  CUSTOM_MIMIC_JSON_OPTIONS = {
    allow_gc: true,
    allow_invalid_unicode: false,
    allow_nan: false,
    array_class: nil,
    array_nl: nil,
    auto_define: false,
    bigdecimal_as_decimal: false,
    bigdecimal_load: :auto,
    circular: false,
    class_cache: false,
    cache_keys: true,
    cache_str: 5,
    create_additions: false,
    create_id: "json_class",
    empty_string: false,
    escape_mode: :unicode_xss,
    float_precision: 0,
    hash_class: nil,
    ignore: nil,
    ignore_under: false,
    indent: 0,
    integer_range: nil,
    mode: :custom,
    nan: :raise,
    nilnil: false,
    object_nl: nil,
    omit_nil: false,
    quirks_mode: true,
    safe: false,
    second_precision: 3,
    space: nil,
    space_before: nil,
    symbol_keys: false,
    time_format: :ruby,
    trace: false,
    use_as_json: false,
    use_raw_json: false,
    use_to_hash: false,
    use_to_json: true,
  }

# A bit hack-ish but does the trick. The JSON.dump_default_options is a Hash
  # but in mimic we use a C struct to store defaults. This class creates a view
  # onto that struct.
  class MimicDumpOption < Hash
    def initialize()
      oo = Oj.default_options
      self.store(:max_nesting, false)
      self.store(:allow_nan, true)
      self.store(:quirks_mode, oo[:quirks_mode])
      self.store(:ascii_only, (:ascii == oo[:escape_mode]))
    end

def []=(key, value)
      case key
      when :quirks_mode
        Oj.default_options = {:quirks_mode => value}
      when :ascii_only
        Oj.default_options = {:ascii_only => value}
      end
    end
  end

# Loads mimic-ed JSON paths. Used by Oj.mimic_JSON().
  # @param mimic_paths [Array] additional paths to add to the Ruby loaded features.
  def self.mimic_loaded(mimic_paths=[])
    $LOAD_PATH.each do |d|
      next unless File.exist?(d)

jfile = File.join(d, 'json.rb')
      $LOADED_FEATURES << jfile unless $LOADED_FEATURES.include?(jfile) if File.exist?(jfile)

Dir.glob(File.join(d, 'json', '**', '*.rb')).each do |file|
        # allow json/add/xxx to be loaded. User can override with Oj.add_to_json(xxx).
        $LOADED_FEATURES << file unless $LOADED_FEATURES.include?(file) unless file.include?('add')
      end
    end
    mimic_paths.each { |p| $LOADED_FEATURES << p }
    $LOADED_FEATURES << 'json' unless $LOADED_FEATURES.include?('json')

require 'oj/json'

if Object.const_defined?('OpenStruct')
      OpenStruct.class_eval do
        # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
        unless defined?(self.as_json)
          def as_json(*)
            name = self.class.name.to_s
            raise JSON::JSONError, "Only named structs are supported!" if 0 == name.length
            { JSON.create_id => name, 't' => table }
          end
        end
        def self.json_create(h)
          new(h['t'] || h[:t])
        end
      end
    end

BigDecimal.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'BigDecimal', 'b' => _dump }
        end
      end
      def self.json_create(h)
        BigDecimal._load(h['b'])
      end
    end

Complex.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'Complex', 'r' => real, 'i' => imag }
        end
      end
      def self.json_create(h)
        Complex(h['r'], h['i'])
      end
    end

DateTime.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          { JSON.create_id => 'DateTime',
            'y' => year,
            'm' => month,
            'd' => day,
            'H' => hour,
            'M' => min,
            'S' => sec,
            'of' => offset.to_s,
            'sg' => start }
        end
      end
      def self.json_create(h)
        # offset is a rational as a string
        as, bs = h['of'].split('/')
        a = as.to_i
        b = bs.to_i
        if 0 == b
          off = a
        else
          off = Rational(a, b)
        end
        civil(h['y'], h['m'], h['d'], h['H'], h['M'], h['S'], off, h['sg'])
      end
    end

Date.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          { JSON.create_id => 'Date', 'y' => year, 'm' => month, 'd' => day, 'sg' => start }
        end
      end
      def self.json_create(h)
        civil(h['y'], h['m'], h['d'], h['sg'])
      end
    end

Exception.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => self.class.name, 'm' => message, 'b' => backtrace }
        end
      end
      def self.json_create(h)
        e = new(h['m'])
        e.set_backtrace(h['b'])
        e
      end
    end

Range.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'Range', 'a' => [first, last, exclude_end?]}
        end
      end
      def self.json_create(h)
        new(*h['a'])
      end
    end

Rational.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'Rational', 'n' => numerator, 'd' => denominator }
        end
      end
      def self.json_create(h)
        Rational(h['n'], h['d'])
      end
    end

Regexp.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'Regexp', 'o' => options, 's' => source }
        end
      end
      def self.json_create(h)
        new(h['s'], h['o'])
      end
    end

Struct.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          name = self.class.name.to_s
          raise JSON::JSONError, "Only named structs are supported!" if 0 == name.length
          { JSON.create_id => name, 'v' => values }
        end
      end
      def self.json_create(h)
        new(*h['v'])
      end
    end

Symbol.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          {JSON.create_id => 'Symbol', 's' => to_s }
        end
      end
      def self.json_create(h)
        h['s'].to_sym
      end
    end

Time.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          nsecs = [ tv_usec * 1000 ]
          nsecs << tv_nsec if respond_to?(:tv_nsec)
          nsecs = nsecs.max
          { JSON.create_id => 'Time', 's' => tv_sec, 'n' => nsecs }
        end
      end
      def self.json_create(h)
        if usec = h.delete('u')
          h['n'] = usec * 1000
        end
        if instance_methods.include?(:tv_nsec)
          at(h['s'], Rational(h['n'], 1000))
        else
          at(h['s'], h['n'] / 1000)
        end
      end
    end

end # self.mimic_loaded

end # Oj

# More monkey patches.
class String
  def to_json_raw_object
    {
      JSON.create_id => self.class.name,
      'raw' => self.bytes
    }
  end
  def to_json_raw(*)
   to_json_raw_object().to_json()
  end
  def self.json_create(obj)
    s = ''
    s.encode!(Encoding::ASCII_8BIT) if s.respond_to?(:encode!)
    raw = obj['raw']
    if raw.is_a? Array
      raw.each { |v| s << v }
    end
    s
  end
end

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