45 lines
1.7 KiB
Swift
45 lines
1.7 KiB
Swift
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public final class ClosedGroupRatchet : NSObject, NSCoding {
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public let chainKey: String
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public let keyIndex: UInt
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public let messageKeys: [String]
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// MARK: Initialization
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public init(chainKey: String, keyIndex: UInt, messageKeys: [String]) {
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self.chainKey = chainKey
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self.keyIndex = keyIndex
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self.messageKeys = messageKeys
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}
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// MARK: Coding
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public init?(coder: NSCoder) {
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guard let chainKey = coder.decodeObject(forKey: "chainKey") as? String,
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let keyIndex = coder.decodeObject(forKey: "keyIndex") as? UInt,
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let messageKeys = coder.decodeObject(forKey: "messageKeys") as? [String] else { return nil }
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self.chainKey = chainKey
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self.keyIndex = UInt(keyIndex)
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self.messageKeys = messageKeys
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super.init()
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}
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public func encode(with coder: NSCoder) {
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coder.encode(chainKey, forKey: "chainKey")
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coder.encode(keyIndex, forKey: "keyIndex")
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coder.encode(messageKeys, forKey: "messageKeys")
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}
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// MARK: Equality
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override public func isEqual(_ other: Any?) -> Bool {
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guard let other = other as? ClosedGroupRatchet else { return false }
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return chainKey == other.chainKey && keyIndex == other.keyIndex && messageKeys == other.messageKeys
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}
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// MARK: Hashing
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override public var hash: Int { // Override NSObject.hash and not Hashable.hashValue or Hashable.hash(into:)
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return chainKey.hashValue ^ keyIndex.hashValue ^ messageKeys.hashValue
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}
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// MARK: Description
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override public var description: String { return "[ chainKey : \(chainKey), keyIndex : \(keyIndex), messageKeys : \(messageKeys.prettifiedDescription) ]" }
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}
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