Fix SSK based closed group leaving
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a666776c88
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@ -412,9 +412,21 @@ final class HomeVC : BaseVC, UITableViewDataSource, UITableViewDelegate, UIScrol
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transaction.removeObject(forKey: "\(publicChat.server).\(publicChat.channel)", inCollection: PublicChatAPI.lastMessageServerIDCollection)
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transaction.removeObject(forKey: "\(publicChat.server).\(publicChat.channel)", inCollection: PublicChatAPI.lastDeletionServerIDCollection)
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let _ = PublicChatAPI.leave(publicChat.channel, on: publicChat.server)
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thread.removeAllThreadInteractions(with: transaction)
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thread.remove(with: transaction)
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} else if let thread = thread as? TSGroupThread, thread.usesSharedSenderKeys == true {
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let groupID = thread.groupModel.groupId
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let groupPublicKey = LKGroupUtilities.getDecodedGroupID(groupID)
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let _ = ClosedGroupsProtocol.leave(groupPublicKey, using: transaction).ensure {
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try! Storage.writeSync { transaction in
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thread.removeAllThreadInteractions(with: transaction)
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thread.remove(with: transaction)
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}
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}
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} else {
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thread.removeAllThreadInteractions(with: transaction)
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thread.remove(with: transaction)
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}
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thread.removeAllThreadInteractions(with: transaction)
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thread.remove(with: transaction)
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}
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NotificationCenter.default.post(name: .threadDeleted, object: nil, userInfo: [ "threadId" : thread.uniqueId! ])
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})
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@ -124,22 +124,25 @@ public final class ClosedGroupsProtocol : NSObject {
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infoMessage.save(with: transaction)
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}
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public static func leave(_ groupPublicKey: String, using transaction: YapDatabaseReadWriteTransaction) {
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public static func leave(_ groupPublicKey: String, using transaction: YapDatabaseReadWriteTransaction) -> Promise<Void> {
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let userPublicKey = UserDefaults.standard[.masterHexEncodedPublicKey] ?? getUserHexEncodedPublicKey()
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removeMembers([ userPublicKey ], from: groupPublicKey, using: transaction)
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return removeMembers([ userPublicKey ], from: groupPublicKey, using: transaction)
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}
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public static func removeMembers(_ membersToRemove: Set<String>, from groupPublicKey: String, using transaction: YapDatabaseReadWriteTransaction) {
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/// The returned promise is fulfilled when the message has been sent **to the group**. It doesn't wait for the user's new ratchet to be distributed.
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public static func removeMembers(_ membersToRemove: Set<String>, from groupPublicKey: String, using transaction: YapDatabaseReadWriteTransaction) -> Promise<Void> {
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// Prepare
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let userPublicKey = UserDefaults.standard[.masterHexEncodedPublicKey] ?? getUserHexEncodedPublicKey()
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let isUserLeaving = membersToRemove.contains(userPublicKey)
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guard !isUserLeaving || membersToRemove.count == 1 else {
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return print("[Loki] Can't remove self and others simultaneously.")
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print("[Loki] Can't remove self and others simultaneously.")
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return Promise.value(())
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}
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let messageSenderJobQueue = SSKEnvironment.shared.messageSenderJobQueue
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let groupID = LKGroupUtilities.getEncodedClosedGroupIDAsData(groupPublicKey)
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guard let thread = TSGroupThread.fetch(uniqueId: TSGroupThread.threadId(fromGroupId: groupID), transaction: transaction) else {
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return print("[Loki] Can't remove users from nonexistent closed group.")
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print("[Loki] Can't remove users from nonexistent closed group.")
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return Promise.value(())
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}
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let group = thread.groupModel
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let name = group.groupName!
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@ -149,7 +152,8 @@ public final class ClosedGroupsProtocol : NSObject {
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var members = group.groupMemberIds
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let indexes = membersToRemove.compactMap { members.firstIndex(of: $0) }
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guard indexes.count == membersToRemove.count else {
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return print("[Loki] Can't remove users from group.")
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print("[Loki] Can't remove users from group.")
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return Promise.value(())
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}
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indexes.forEach { members.remove(at: $0) }
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let membersAsData = members.map { Data(hex: $0) }
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@ -157,14 +161,20 @@ public final class ClosedGroupsProtocol : NSObject {
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let closedGroupUpdateMessageKind = ClosedGroupUpdateMessage.Kind.info(groupPublicKey: Data(hex: groupPublicKey), name: name, senderKeys: [],
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members: membersAsData, admins: adminsAsData)
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let closedGroupUpdateMessage = ClosedGroupUpdateMessage(thread: thread, kind: closedGroupUpdateMessageKind)
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messageSenderJobQueue.add(message: closedGroupUpdateMessage, transaction: transaction)
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// Delete all ratchets (it's important that this happens after sending out the update)
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Storage.removeAllClosedGroupRatchets(for: groupPublicKey, using: transaction)
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// Remove the group from the user's set of public keys to poll for if the user is leaving. Otherwise generate a new ratchet and send it out to all
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// members (minus the removed ones) and their linked devices using established channels.
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if isUserLeaving {
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Storage.removeClosedGroupPrivateKey(for: groupPublicKey, using: transaction)
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} else {
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let (promise, seal) = Promise<Void>.pending()
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SSKEnvironment.shared.messageSender.send(closedGroupUpdateMessage, success: { seal.fulfill(()) }, failure: { seal.reject($0) })
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promise.done {
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try! Storage.writeSync { transaction in
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// Delete all ratchets (it's important that this happens after sending out the update)
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Storage.removeAllClosedGroupRatchets(for: groupPublicKey, using: transaction)
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// Remove the group from the user's set of public keys to poll for
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if isUserLeaving {
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Storage.removeClosedGroupPrivateKey(for: groupPublicKey, using: transaction)
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}
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}
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}
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// Generate a new ratchet and send it out to all members (minus the removed ones) and their linked devices using established channels if needed.
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if !isUserLeaving {
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// Establish sessions if needed
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establishSessionsIfNeeded(with: members, using: transaction) // This internally takes care of multi device
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// Send out the user's new ratchet to all members (minus the removed ones) and their linked devices using established channels
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@ -186,6 +196,8 @@ public final class ClosedGroupsProtocol : NSObject {
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let infoMessageType: TSInfoMessageType = isUserLeaving ? .typeGroupQuit : .typeGroupUpdate
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let infoMessage = TSInfoMessage(timestamp: NSDate.ows_millisecondTimeStamp(), in: thread, messageType: infoMessageType)
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infoMessage.save(with: transaction)
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// Return
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return promise
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}
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public static func requestSenderKey(for groupPublicKey: String, senderPublicKey: String, using transaction: YapDatabaseReadWriteTransaction) {
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@ -274,7 +286,7 @@ public final class ClosedGroupsProtocol : NSObject {
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}
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let group = thread.groupModel
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// Check that the sender is a member of the group (before the update)
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var membersAndLinkedDevices: Set<String> = []
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var membersAndLinkedDevices: Set<String> = Set(group.groupMemberIds)
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for member in group.groupMemberIds {
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let deviceLinks = OWSPrimaryStorage.shared().getDeviceLinks(for: member, in: transaction)
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membersAndLinkedDevices.formUnion(deviceLinks.flatMap { [ $0.master.publicKey, $0.slave.publicKey ] })
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@ -333,7 +345,7 @@ public final class ClosedGroupsProtocol : NSObject {
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}
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let group = groupThread.groupModel
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// Check that the requesting user is a member of the group
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var membersAndLinkedDevices: Set<String> = []
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var membersAndLinkedDevices: Set<String> = Set(group.groupMemberIds)
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for member in group.groupMemberIds {
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let deviceLinks = OWSPrimaryStorage.shared().getDeviceLinks(for: member, in: transaction)
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membersAndLinkedDevices.formUnion(deviceLinks.flatMap { [ $0.master.publicKey, $0.slave.publicKey ] })
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@ -365,7 +377,7 @@ public final class ClosedGroupsProtocol : NSObject {
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return print("[Loki] Ignoring invalid closed group sender key.")
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}
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// Check that the requesting user is a member of the group
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var membersAndLinkedDevices: Set<String> = []
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var membersAndLinkedDevices: Set<String> = Set(group.groupMemberIds)
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for member in group.groupMemberIds {
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let deviceLinks = OWSPrimaryStorage.shared().getDeviceLinks(for: member, in: transaction)
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membersAndLinkedDevices.formUnion(deviceLinks.flatMap { [ $0.master.publicKey, $0.slave.publicKey ] })
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