195 lines
10 KiB
Swift
195 lines
10 KiB
Swift
import SessionProtocolKit
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import SessionUtilitiesKit
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@objc(SNClosedGroupUpdate)
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public final class ClosedGroupUpdate : ControlMessage {
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public var kind: Kind?
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// MARK: Kind
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public enum Kind : CustomStringConvertible {
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case new(groupPublicKey: Data, name: String, groupPrivateKey: Data, senderKeys: [ClosedGroupSenderKey], members: [Data], admins: [Data])
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case info(groupPublicKey: Data, name: String, senderKeys: [ClosedGroupSenderKey], members: [Data], admins: [Data])
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case senderKeyRequest(groupPublicKey: Data)
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case senderKey(groupPublicKey: Data, senderKey: ClosedGroupSenderKey)
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public var description: String {
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switch self {
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case .new: return "new"
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case .info: return "info"
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case .senderKeyRequest: return "senderKeyRequest"
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case .senderKey: return "senderKey"
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}
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}
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}
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// MARK: Initialization
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public override init() { super.init() }
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internal init(kind: Kind) {
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super.init()
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self.kind = kind
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}
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// MARK: Validation
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public override var isValid: Bool {
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guard super.isValid, let kind = kind else { return false }
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switch kind {
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case .new(let groupPublicKey, let name, let groupPrivateKey, _, let members, let admins):
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return !groupPublicKey.isEmpty && !name.isEmpty && !groupPrivateKey.isEmpty && !members.isEmpty && !admins.isEmpty // senderKeys may be empty
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case .info(let groupPublicKey, let name, _, let members, let admins):
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return !groupPublicKey.isEmpty && !name.isEmpty && !members.isEmpty && !admins.isEmpty // senderKeys may be empty
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case .senderKeyRequest(let groupPublicKey):
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return !groupPublicKey.isEmpty
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case .senderKey(let groupPublicKey, _):
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return !groupPublicKey.isEmpty
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}
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}
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// MARK: Coding
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public required init?(coder: NSCoder) {
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super.init(coder: coder)
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guard let groupPublicKey = coder.decodeObject(forKey: "groupPublicKey") as? Data,
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let rawKind = coder.decodeObject(forKey: "kind") as? String else { return }
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switch rawKind {
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case "new":
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guard let name = coder.decodeObject(forKey: "name") as? String,
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let groupPrivateKey = coder.decodeObject(forKey: "groupPrivateKey") as? Data,
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let senderKeys = coder.decodeObject(forKey: "senderKeys") as? [ClosedGroupSenderKey],
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let members = coder.decodeObject(forKey: "members") as? [Data],
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let admins = coder.decodeObject(forKey: "admins") as? [Data] else { return }
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self.kind = .new(groupPublicKey: groupPublicKey, name: name, groupPrivateKey: groupPrivateKey, senderKeys: senderKeys, members: members, admins: admins)
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case "info":
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guard let name = coder.decodeObject(forKey: "name") as? String,
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let senderKeys = coder.decodeObject(forKey: "senderKeys") as? [ClosedGroupSenderKey],
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let members = coder.decodeObject(forKey: "members") as? [Data],
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let admins = coder.decodeObject(forKey: "admins") as? [Data] else { return }
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self.kind = .info(groupPublicKey: groupPublicKey, name: name, senderKeys: senderKeys, members: members, admins: admins)
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case "senderKeyRequest":
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self.kind = .senderKeyRequest(groupPublicKey: groupPublicKey)
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case "senderKey":
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guard let senderKeys = coder.decodeObject(forKey: "senderKeys") as? [ClosedGroupSenderKey],
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let senderKey = senderKeys.first else { return }
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self.kind = .senderKey(groupPublicKey: groupPublicKey, senderKey: senderKey)
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default: return
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}
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}
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public override func encode(with coder: NSCoder) {
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super.encode(with: coder)
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guard let kind = kind else { return }
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switch kind {
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case .new(let groupPublicKey, let name, let groupPrivateKey, let senderKeys, let members, let admins):
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coder.encode("new", forKey: "kind")
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coder.encode(groupPublicKey, forKey: "groupPublicKey")
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coder.encode(name, forKey: "name")
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coder.encode(groupPrivateKey, forKey: "groupPrivateKey")
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coder.encode(senderKeys, forKey: "senderKeys")
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coder.encode(members, forKey: "members")
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coder.encode(admins, forKey: "admins")
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case .info(let groupPublicKey, let name, let senderKeys, let members, let admins):
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coder.encode("info", forKey: "kind")
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coder.encode(groupPublicKey, forKey: "groupPublicKey")
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coder.encode(name, forKey: "name")
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coder.encode(senderKeys, forKey: "senderKeys")
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coder.encode(members, forKey: "members")
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coder.encode(admins, forKey: "admins")
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case .senderKeyRequest(let groupPublicKey):
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coder.encode(groupPublicKey, forKey: "groupPublicKey")
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case .senderKey(let groupPublicKey, let senderKey):
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coder.encode("senderKey", forKey: "kind")
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coder.encode(groupPublicKey, forKey: "groupPublicKey")
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coder.encode([ senderKey ], forKey: "senderKeys")
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}
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}
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// MARK: Proto Conversion
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public override class func fromProto(_ proto: SNProtoContent) -> ClosedGroupUpdate? {
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guard let closedGroupUpdateProto = proto.dataMessage?.closedGroupUpdate else { return nil }
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let groupPublicKey = closedGroupUpdateProto.groupPublicKey
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let kind: Kind
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switch closedGroupUpdateProto.type {
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case .new:
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guard let name = closedGroupUpdateProto.name, let groupPrivateKey = closedGroupUpdateProto.groupPrivateKey else { return nil }
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let senderKeys = closedGroupUpdateProto.senderKeys.map { ClosedGroupSenderKey.fromProto($0) }
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kind = .new(groupPublicKey: groupPublicKey, name: name, groupPrivateKey: groupPrivateKey,
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senderKeys: senderKeys, members: closedGroupUpdateProto.members, admins: closedGroupUpdateProto.admins)
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case .info:
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guard let name = closedGroupUpdateProto.name else { return nil }
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let senderKeys = closedGroupUpdateProto.senderKeys.map { ClosedGroupSenderKey.fromProto($0) }
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kind = .info(groupPublicKey: groupPublicKey, name: name, senderKeys: senderKeys, members: closedGroupUpdateProto.members, admins: closedGroupUpdateProto.admins)
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case .senderKeyRequest:
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kind = .senderKeyRequest(groupPublicKey: groupPublicKey)
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case .senderKey:
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guard let senderKeyProto = closedGroupUpdateProto.senderKeys.first else { return nil }
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kind = .senderKey(groupPublicKey: groupPublicKey, senderKey: ClosedGroupSenderKey.fromProto(senderKeyProto))
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}
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return ClosedGroupUpdate(kind: kind)
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}
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public override func toProto(using transaction: YapDatabaseReadWriteTransaction) -> SNProtoContent? {
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guard let kind = kind else {
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SNLog("Couldn't construct closed group update proto from: \(self).")
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return nil
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}
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do {
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let closedGroupUpdate: SNProtoDataMessageClosedGroupUpdate.SNProtoDataMessageClosedGroupUpdateBuilder
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switch kind {
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case .new(let groupPublicKey, let name, let groupPrivateKey, let senderKeys, let members, let admins):
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closedGroupUpdate = SNProtoDataMessageClosedGroupUpdate.builder(groupPublicKey: groupPublicKey, type: .new)
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closedGroupUpdate.setName(name)
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closedGroupUpdate.setGroupPrivateKey(groupPrivateKey)
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closedGroupUpdate.setSenderKeys(try senderKeys.map { try $0.toProto() })
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closedGroupUpdate.setMembers(members)
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closedGroupUpdate.setAdmins(admins)
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case .info(let groupPublicKey, let name, let senderKeys, let members, let admins):
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closedGroupUpdate = SNProtoDataMessageClosedGroupUpdate.builder(groupPublicKey: groupPublicKey, type: .info)
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closedGroupUpdate.setName(name)
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closedGroupUpdate.setSenderKeys(try senderKeys.map { try $0.toProto() })
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closedGroupUpdate.setMembers(members)
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closedGroupUpdate.setAdmins(admins)
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case .senderKeyRequest(let groupPublicKey):
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closedGroupUpdate = SNProtoDataMessageClosedGroupUpdate.builder(groupPublicKey: groupPublicKey, type: .senderKeyRequest)
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case .senderKey(let groupPublicKey, let senderKey):
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closedGroupUpdate = SNProtoDataMessageClosedGroupUpdate.builder(groupPublicKey: groupPublicKey, type: .senderKey)
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closedGroupUpdate.setSenderKeys([ try senderKey.toProto() ])
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}
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let contentProto = SNProtoContent.builder()
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let dataMessageProto = SNProtoDataMessage.builder()
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dataMessageProto.setClosedGroupUpdate(try closedGroupUpdate.build())
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// Group context
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try setGroupContextIfNeeded(on: dataMessageProto, using: transaction)
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// Expiration timer
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// TODO: We * want * expiration timer updates to be explicit. But currently Android will disable the expiration timer for a conversation
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// if it receives a message without the current expiration timer value attached to it...
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let expiration = OWSDisappearingMessagesConfiguration.fetch(uniqueId: threadID!, transaction: transaction)?.durationSeconds ?? 0
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dataMessageProto.setExpireTimer(expiration)
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contentProto.setDataMessage(try dataMessageProto.build())
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return try contentProto.build()
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} catch {
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SNLog("Couldn't construct closed group update proto from: \(self).")
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return nil
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}
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}
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// MARK: Description
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public override var description: String {
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"""
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ClosedGroupUpdate(
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kind: \(kind?.description ?? "null")
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)
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"""
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}
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}
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private extension ClosedGroupSenderKey {
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static func fromProto(_ proto: SNProtoDataMessageClosedGroupUpdateSenderKey) -> ClosedGroupSenderKey {
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return ClosedGroupSenderKey(chainKey: proto.chainKey, keyIndex: UInt(proto.keyIndex), publicKey: proto.publicKey)
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}
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func toProto() throws -> SNProtoDataMessageClosedGroupUpdateSenderKey {
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return try SNProtoDataMessageClosedGroupUpdateSenderKey.builder(chainKey: chainKey, keyIndex: UInt32(keyIndex), publicKey: publicKey).build()
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}
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}
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