211 lines
13 KiB
Swift
211 lines
13 KiB
Swift
import PromiseKit
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@objc(LKGroupChatAPI)
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public final class LokiGroupChatAPI : LokiDotNetAPI {
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private static var moderators: [String:[UInt64:Set<String>]] = [:] // Server URL to (channel ID to set of moderator IDs)
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// MARK: Settings
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private static let fallbackBatchCount = 20
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private static let maxRetryCount: UInt = 8
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// MARK: Public Chat
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#if DEBUG
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@objc public static let publicChatServer = "https://chat-dev.lokinet.org"
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#else
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@objc public static let publicChatServer = "https://chat.lokinet.org"
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#endif
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@objc public static let publicChatMessageType = "network.loki.messenger.publicChat"
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@objc public static let publicChatServerID: UInt64 = 1
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// MARK: Convenience
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private static var userDisplayName: String {
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return SSKEnvironment.shared.contactsManager.displayName(forPhoneIdentifier: userHexEncodedPublicKey) ?? "Anonymous"
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}
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// MARK: Database
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override internal class var authTokenCollection: String { "LokiGroupChatAuthTokenCollection" }
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private static let lastMessageServerIDCollection = "LokiGroupChatLastMessageServerIDCollection"
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private static let lastDeletionServerIDCollection = "LokiGroupChatLastDeletionServerIDCollection"
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private static func getLastMessageServerID(for group: UInt64, on server: String) -> UInt? {
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var result: UInt? = nil
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storage.dbReadConnection.read { transaction in
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result = transaction.object(forKey: "\(server).\(group)", inCollection: lastMessageServerIDCollection) as! UInt?
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}
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return result
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}
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private static func setLastMessageServerID(for group: UInt64, on server: String, to newValue: UInt64) {
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storage.dbReadWriteConnection.readWrite { transaction in
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transaction.setObject(newValue, forKey: "\(server).\(group)", inCollection: lastMessageServerIDCollection)
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}
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}
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private static func getLastDeletionServerID(for group: UInt64, on server: String) -> UInt? {
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var result: UInt? = nil
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storage.dbReadConnection.read { transaction in
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result = transaction.object(forKey: "\(server).\(group)", inCollection: lastDeletionServerIDCollection) as! UInt?
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}
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return result
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}
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private static func setLastDeletionServerID(for group: UInt64, on server: String, to newValue: UInt64) {
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storage.dbReadWriteConnection.readWrite { transaction in
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transaction.setObject(newValue, forKey: "\(server).\(group)", inCollection: lastDeletionServerIDCollection)
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}
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}
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// MARK: Public API
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public static func getMessages(for group: UInt64, on server: String) -> Promise<[LokiGroupMessage]> {
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print("[Loki] Getting messages for group chat with ID: \(group) on server: \(server).")
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var queryParameters = "include_annotations=1"
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if let lastMessageServerID = getLastMessageServerID(for: group, on: server) {
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queryParameters += "&since_id=\(lastMessageServerID)"
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} else {
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queryParameters += "&count=-\(fallbackBatchCount)"
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}
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let url = URL(string: "\(server)/channels/\(group)/messages?\(queryParameters)")!
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let request = TSRequest(url: url)
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return TSNetworkManager.shared().makePromise(request: request).map { $0.responseObject }.map { rawResponse in
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guard let json = rawResponse as? JSON, let rawMessages = json["data"] as? [JSON] else {
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print("[Loki] Couldn't parse messages for group chat with ID: \(group) on server: \(server) from: \(rawResponse).")
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throw Error.parsingFailed
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}
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return rawMessages.flatMap { message in
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let isDeleted = (message["is_deleted"] as? Int == 1)
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guard !isDeleted else { return nil }
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guard let annotations = message["annotations"] as? [JSON], let annotation = annotations.first, let value = annotation["value"] as? JSON,
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let serverID = message["id"] as? UInt64, let body = message["text"] as? String, let hexEncodedPublicKey = value["source"] as? String, let displayName = value["from"] as? String,
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let timestamp = value["timestamp"] as? UInt64 else {
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print("[Loki] Couldn't parse message for group chat with ID: \(group) on server: \(server) from: \(message).")
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return nil
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}
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let lastMessageServerID = getLastMessageServerID(for: group, on: server)
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if serverID > (lastMessageServerID ?? 0) { setLastMessageServerID(for: group, on: server, to: serverID) }
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let quote: LokiGroupMessage.Quote?
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if let quoteAsJSON = value["quote"] as? JSON, let quotedMessageTimestamp = quoteAsJSON["id"] as? UInt64, let quoteeHexEncodedPublicKey = quoteAsJSON["author"] as? String, let quotedMessageBody = quoteAsJSON["text"] as? String {
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quote = LokiGroupMessage.Quote(quotedMessageTimestamp: quotedMessageTimestamp, quoteeHexEncodedPublicKey: quoteeHexEncodedPublicKey, quotedMessageBody: quotedMessageBody)
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} else {
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quote = nil
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}
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return LokiGroupMessage(serverID: serverID, hexEncodedPublicKey: hexEncodedPublicKey, displayName: displayName, body: body, type: publicChatMessageType, timestamp: timestamp, quote: quote)
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}.sorted { $0.timestamp < $1.timestamp }
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}
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}
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public static func sendMessage(_ message: LokiGroupMessage, to group: UInt64, on server: String) -> Promise<LokiGroupMessage> {
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return getAuthToken(for: server).then { token -> Promise<LokiGroupMessage> in
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print("[Loki] Sending message to group chat with ID: \(group) on server: \(server).")
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let url = URL(string: "\(server)/channels/\(group)/messages")!
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let parameters = message.toJSON()
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let request = TSRequest(url: url, method: "POST", parameters: parameters)
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request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
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let displayName = userDisplayName
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return TSNetworkManager.shared().makePromise(request: request).map { $0.responseObject }.map { rawResponse in
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// ISO8601DateFormatter doesn't support milliseconds before iOS 11
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let dateFormatter = DateFormatter()
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dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
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guard let json = rawResponse as? JSON, let messageAsJSON = json["data"] as? JSON, let serverID = messageAsJSON["id"] as? UInt64, let body = messageAsJSON["text"] as? String,
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let dateAsString = messageAsJSON["created_at"] as? String, let date = dateFormatter.date(from: dateAsString) else {
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print("[Loki] Couldn't parse message for group chat with ID: \(group) on server: \(server) from: \(rawResponse).")
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throw Error.parsingFailed
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}
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let timestamp = UInt64(date.timeIntervalSince1970) * 1000
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return LokiGroupMessage(serverID: serverID, hexEncodedPublicKey: userHexEncodedPublicKey, displayName: displayName, body: body, type: publicChatMessageType, timestamp: timestamp, quote: message.quote)
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}
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}.recover { error -> Promise<LokiGroupMessage> in
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if let error = error as? NetworkManagerError, error.statusCode == 401 {
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print("[Loki] Group chat auth token for: \(server) expired; dropping it.")
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storage.dbReadWriteConnection.removeObject(forKey: server, inCollection: authTokenCollection)
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}
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throw error
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}.retryingIfNeeded(maxRetryCount: maxRetryCount).map { message in
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Analytics.shared.track("Group Message Sent")
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return message
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}.recover { error -> Promise<LokiGroupMessage> in
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Analytics.shared.track("Failed to Send Group Message")
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throw error
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}
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}
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public static func getDeletedMessageServerIDs(for group: UInt64, on server: String) -> Promise<[UInt64]> {
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print("[Loki] Getting deleted messages for group chat with ID: \(group) on server: \(server).")
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let queryParameters: String
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if let lastDeletionServerID = getLastDeletionServerID(for: group, on: server) {
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queryParameters = "since_id=\(lastDeletionServerID)"
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} else {
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queryParameters = "count=\(fallbackBatchCount)"
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}
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let url = URL(string: "\(server)/loki/v1/channel/\(group)/deletes?\(queryParameters)")!
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let request = TSRequest(url: url)
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return TSNetworkManager.shared().makePromise(request: request).map { $0.responseObject }.map { rawResponse in
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guard let json = rawResponse as? JSON, let deletions = json["data"] as? [JSON] else {
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print("[Loki] Couldn't parse deleted messages for group chat with ID: \(group) on server: \(server) from: \(rawResponse).")
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throw Error.parsingFailed
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}
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return deletions.flatMap { deletion in
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guard let serverID = deletion["id"] as? UInt64, let messageServerID = deletion["message_id"] as? UInt64 else {
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print("[Loki] Couldn't parse deleted message for group chat with ID: \(group) on server: \(server) from: \(deletion).")
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return nil
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}
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let lastDeletionServerID = getLastDeletionServerID(for: group, on: server)
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if serverID > (lastDeletionServerID ?? 0) { setLastDeletionServerID(for: group, on: server, to: serverID) }
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return messageServerID
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}
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}
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}
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public static func deleteMessage(with messageID: UInt, for group: UInt64, on server: String, isSentByUser: Bool) -> Promise<Void> {
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return getAuthToken(for: server).then { token -> Promise<Void> in
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let isModerationRequest = !isSentByUser
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print("[Loki] Deleting message with ID: \(messageID) for group chat with ID: \(group) on server: \(server) (isModerationRequest = \(isModerationRequest)).")
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let urlAsString = isSentByUser ? "\(server)/channels/\(group)/messages/\(messageID)" : "\(server)/loki/v1/moderation/message/\(messageID)"
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let url = URL(string: urlAsString)!
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let request = TSRequest(url: url, method: "DELETE", parameters: [:])
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request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
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return TSNetworkManager.shared().makePromise(request: request).done { result -> Void in
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print("[Loki] Deleted message with ID: \(messageID) on server: \(server).")
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}.retryingIfNeeded(maxRetryCount: maxRetryCount)
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}
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}
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public static func getModerators(for group: UInt64, on server: String) -> Promise<Set<String>> {
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let url = URL(string: "\(server)/loki/v1/channel/\(group)/get_moderators")!
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let request = TSRequest(url: url)
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return TSNetworkManager.shared().makePromise(request: request).map { $0.responseObject }.map { rawResponse in
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guard let json = rawResponse as? JSON, let moderators = json["moderators"] as? [String] else {
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print("[Loki] Couldn't parse moderators for group chat with ID: \(group) on server: \(server) from: \(rawResponse).")
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throw Error.parsingFailed
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}
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let moderatorAsSet = Set(moderators);
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if self.moderators.keys.contains(server) {
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self.moderators[server]![group] = moderatorAsSet
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} else {
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self.moderators[server] = [ group : moderatorAsSet ]
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}
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return moderatorAsSet
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}
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}
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@objc (isUserModerator:forGroup:onServer:)
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public static func isUserModerator(_ hexEncodedPublicString: String, for group: UInt64, on server: String) -> Bool {
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return moderators[server]?[group]?.contains(hexEncodedPublicString) ?? false
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}
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// MARK: Public API (Obj-C)
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@objc(getMessagesForGroup:onServer:)
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public static func objc_getMessages(for group: UInt64, on server: String) -> AnyPromise {
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return AnyPromise.from(getMessages(for: group, on: server))
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}
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@objc(sendMessage:toGroup:onServer:)
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public static func objc_sendMessage(_ message: LokiGroupMessage, to group: UInt64, on server: String) -> AnyPromise {
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return AnyPromise.from(sendMessage(message, to: group, on: server))
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}
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@objc (deleteMessageWithID:forGroup:onServer:isSentByUser:)
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public static func objc_deleteMessage(with messageID: UInt, for group: UInt64, on server: String, isSentByUser: Bool) -> AnyPromise {
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return AnyPromise.from(deleteMessage(with: messageID, for: group, on: server, isSentByUser: isSentByUser))
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}
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}
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