Class: Mjai::JSONizable

Inherits:
Object
  • Object
show all
Defined in:
lib/mjai/jsonizable.rb

Direct Known Subclasses

Action

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fields) ⇒ JSONizable

Returns a new instance of JSONizable.



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# File 'lib/mjai/jsonizable.rb', line 119

def initialize(fields)
  for name, value in fields
    if !@@field_specs.any?(){ |n, t| n == name }
      raise(ArgumentError, "unknown field: %p" % name)
    end
  end
  @fields = fields
end

Instance Attribute Details

#fields ⇒ Object (readonly)

Returns the value of attribute fields.



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# File 'lib/mjai/jsonizable.rb', line 128

def fields
  @fields
end

Class Method Details

.define_fields(specs) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 11

def self.define_fields(specs)
  @@field_specs = specs
  @@field_specs.each() do |name, type|
    define_method(name) do
      return @fields[name]
    end
  end
end

.from_json(json, game) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 20

def self.from_json(json, game)
  plain = JSON.parse(json)
  begin
    return from_plain(plain, nil, game)
  rescue ValidationError => ex
    raise(ValidationError, "%s JSON: %s" % [ex.message, json])
  end
end

.from_plain(plain, name, game) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 29

def self.from_plain(plain, name, game)
  validate(plain.is_a?(Hash), "%s must be an object." % (name || "The response"))
  fields = {}
  for field_name, type in @@field_specs
    field_plain = plain[field_name.to_s()]
    next if field_plain == nil
    fields[field_name] = plain_to_obj(
        field_plain, type, name ? "#{name}.#{field_name}" : field_name.to_s(), game)
  end
  return new(fields)
end

.plain_to_obj(plain, type, name, game) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 41

def self.plain_to_obj(plain, type, name, game)
  case type
    when :number
      validate_class(plain, Integer, name)
      return plain
    when :string
      validate_class(plain, String, name)
      return plain
    when :string_or_null
      validate(plain.is_a?(String) || plain == nil, "#{name} must be String or null.")
      return plain
    when :boolean
      validate(
          plain.is_a?(TrueClass) || plain.is_a?(FalseClass),
          "#{name} must be either true or false.")
      return plain
    when :symbol
      validate_class(plain, String, name)
      validate(!plain.empty?, "#{name} must not be empty.")
      return plain.intern()
    when :player
      validate_class(plain, Integer, name)
      validate((0...4).include?(plain), "#{name} must be either 0, 1, 2 or 3.")
      return game.players[plain]
    when :pai
      validate_class(plain, String, name)
      begin
        return Pai.new(plain)
      rescue ArgumentError => ex
        raise(ValidationError, "Error in %s: %s" % [name, ex.message])
      end
    when :yaku
      validate_class(plain, Array, name)
      validate(
          plain.size == 2 && plain[0].is_a?(String) && plain[1].is_a?(Integer),
          "#{name} must be an array of [String, Integer].")
      validate(!plain[0].empty?, "#{name}[0] must not be empty.")
      return [plain[0].intern(), plain[1]]
    when :action
      return from_plain(plain, name, game)
    when :numbers
      return plains_to_objs(plain, :number, name, game)
    when :strings
      return plains_to_objs(plain, :string, name, game)
    when :strings_or_nulls
      return plains_to_objs(plain, :string_or_null, name, game)
    when :booleans
      return plains_to_objs(plain, :boolean, name, game)
    when :symbols
      return plains_to_objs(plain, :symbol, name, game)
    when :pais
      return plains_to_objs(plain, :pai, name, game)
    when :pais_list
      return plains_to_objs(plain, :pais, name, game)
    when :yakus
      return plains_to_objs(plain, :yaku, name, game)
    when :actions
      return plains_to_objs(plain, :action, name, game)
    else
      raise("unknown type")
  end
end

.plains_to_objs(plains, type, name, game) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 104

def self.plains_to_objs(plains, type, name, game)
  validate_class(plains, Array, name)
  return plains.each_with_index().map() do |c, i|
    plain_to_obj(c, type, "#{name}[#{i}]", game)
  end
end

.validate(criterion, message) ⇒ Object

Raises:



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# File 'lib/mjai/jsonizable.rb', line 111

def self.validate(criterion, message)
  raise(ValidationError, message) if !criterion
end

.validate_class(plain, klass, name) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 115

def self.validate_class(plain, klass, name)
  validate(plain.is_a?(klass), "%s must be %p." % [name, klass])
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/mjai/jsonizable.rb', line 179

def ==(other)
  return self.class == other.class && @fields == other.fields
end

#hash ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 185

def hash
  return @fields.hash
end

#merge(hash) ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 164

def merge(hash)
  fields = @fields.dup()
  for name, value in hash
    if !@@field_specs.any?(){ |n, t| n == name }
      raise(ArgumentError, "unknown field: %p" % k)
    end
    if value == nil
      fields.delete(name)
    else
      fields[name] = value
    end
  end
  return self.class.new(fields)
end

#to_json ⇒ Object Also known as: to_s 



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# File 'lib/mjai/jsonizable.rb', line 130

def to_json()
  return JSON.dump(to_plain())
end

#to_plain ⇒ Object 



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# File 'lib/mjai/jsonizable.rb', line 134

def to_plain()
  hash = {}
  for name, type in @@field_specs
    obj = @fields[name]
    next if obj == nil
    case type
      when :symbol, :pai
        plain = obj.to_s()
      when :player
        plain = obj.id
      when :symbols, :pais
        plain = obj.map(){ |a| a.to_s() }
      when :pais_list
        plain = obj.map(){ |o| o.map(){ |a| a.to_s() } }
      when :yakus
        plain = obj.map(){ |s, n| [s.to_s(), n] }
      when :actions
        plain = obj.map(){ |a| a.to_plain() }
      when :number, :numbers, :string, :strings, :string_or_null, :strings_or_nulls, :boolean, :booleans
        plain = obj
      else
        raise("unknown type")
    end
    hash[name.to_s()] = plain
  end
  return hash
end