Class: StrongJSON::Type::Object

Inherits:
Object
  • Object
show all
Includes:
Match, WithAlias
Defined in:
lib/strong_json/type.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from WithAlias

#alias, #with_alias

Methods included from Match

#===, #=~

Constructor Details

#initialize(fields, on_unknown:, exceptions:) ⇒ Object

Returns a new instance of Object.



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# File 'lib/strong_json/type.rb', line 196

def initialize(fields, on_unknown:, exceptions:)
  @fields = fields
  @on_unknown = on_unknown
  @exceptions = exceptions
end

Instance Attribute Details

#exceptions ⇒ Object (readonly)

Returns the value of attribute exceptions.



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# File 'lib/strong_json/type.rb', line 194

def exceptions
  @exceptions
end

#fields ⇒ Object (readonly)

Returns the value of attribute fields.



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# File 'lib/strong_json/type.rb', line 194

def fields
  @fields
end

#on_unknown ⇒ Object (readonly)

Returns the value of attribute on_unknown.



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# File 'lib/strong_json/type.rb', line 194

def on_unknown
  @on_unknown
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 279

def ==(other)
  if other.is_a?(Object)
    other.fields == fields &&
      other.on_unknown == on_unknown &&
      other.exceptions == exceptions
  end
end

#coerce(object, path: ErrorPath.root(self)) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 202

def coerce(object, path: ErrorPath.root(self))
  unless object.is_a?(::Hash)
    raise TypeError.new(path: path, value: object)
  end

  object = object.dup
  unknown_attributes = Set.new(object.keys) - fields.keys

  case on_unknown
  when :reject
    unknown_attributes.each do |attr|
      if exceptions.member?(attr)
        object.delete(attr)
      else
        raise UnexpectedAttributeError.new(path: path, attribute: attr)
      end
    end
  when :ignore
    unknown_attributes.each do |attr|
      if exceptions.member?(attr)
        raise UnexpectedAttributeError.new(path: path, attribute: attr)
      else
        object.delete(attr)
      end
    end
  end

  # @type var result: ::Hash[Symbol, untyped]
  result = {}

  fields.each do |key, type|
    result[key] = type.coerce(object[key], path: path.dig(key: key, type: type))
  end

  _ = result
end

#ignore(*ignores, except: nil) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 239

def ignore(*ignores, except: nil)
  if ignores.empty? && !except
    Object.new(fields, on_unknown: :ignore, exceptions: Set[])
  else
    if except
      Object.new(fields, on_unknown: :ignore, exceptions: except)
    else
      Object.new(fields, on_unknown: :reject, exceptions: Set.new(ignores))
    end
  end
end

#reject(*rejecteds, except: nil) ⇒ Object 



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# File 'lib/strong_json/type.rb', line 251

def reject(*rejecteds, except: nil)
  if rejecteds.empty? && !except
    Object.new(fields, on_unknown: :reject, exceptions: Set[])
  else
    if except
      Object.new(fields, on_unknown: :reject, exceptions: except)
    else
      Object.new(fields, on_unknown: :ignore, exceptions: Set.new(rejecteds))
    end
  end
end

#to_s ⇒ Object 



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# File 'lib/strong_json/type.rb', line 271

def to_s
  fields = @fields.map do |name, type|
    "#{name}: #{type}"
  end

  self.alias&.to_s || "object(#{fields.join(', ')})"
end

#update_fields ⇒ Object 



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# File 'lib/strong_json/type.rb', line 263

def update_fields
  fields.dup.yield_self do |fields|
    yield fields

    Object.new(fields, on_unknown: on_unknown, exceptions: exceptions)
  end
end