codable model with struct to have more control over the encoding/decoding

MediaContainerModel.swift

struct MediaContainerModel<Type: Decodable & MediaContainerizable>: Decodable {
	var title1: String
	var content: [Type]

	struct CodingKeys: CodingKey {
		init?(intValue: Int) {
			return nil
		}

		init(stringValue: String) {
			self.stringValue = stringValue
		}

		let stringValue: String
		let intValue: Int? = nil

		static var title1: Self { Self(stringValue: "title1") }
		static var content: Self { Self(stringValue: Type.contentType.rawValue) }
	}

	init(from decoder: Decoder) throws {
		let container = try decoder.container(keyedBy: CodingKeys.self)

		self.title1 = try container.decode(String.self, forKey: CodingKeys.title1)
		self.content = try container.decode([Type].self, forKey: CodingKeys.content)
	}
}