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418 lines
26 KiB
Swift
418 lines
26 KiB
Swift
import PromiseKit
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@objc(LKPublicChatAPI)
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public final class LokiPublicChatAPI : 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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@objc public static let defaultChats: [LokiPublicChat] = [] // Currently unused
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public static var displayNameUpdatees: [String:Set<String>] = [:]
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// MARK: Settings
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private static let attachmentType = "net.app.core.oembed"
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private static let channelInfoType = "net.patter-app.settings"
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private static let fallbackBatchCount = 64
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private static let maxRetryCount: UInt = 4
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public static let profilePictureType = "network.loki.messenger.avatar"
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@objc public static let publicChatMessageType = "network.loki.messenger.publicChat"
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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: getUserHexEncodedPublicKey()) ?? "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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@objc public static let lastMessageServerIDCollection = "LokiGroupChatLastMessageServerIDCollection"
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@objc public 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 removeLastMessageServerID(for group: UInt64, on server: String) {
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storage.dbReadWriteConnection.readWrite { transaction in
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transaction.removeObject(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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private static func removeLastDeletionServerID(for group: UInt64, on server: String) {
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storage.dbReadWriteConnection.readWrite { transaction in
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transaction.removeObject(forKey: "\(server).\(group)", inCollection: lastDeletionServerIDCollection)
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}
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}
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public static func clearCaches(for channel: UInt64, on server: String) {
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removeLastMessageServerID(for: channel, on: server)
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removeLastDeletionServerID(for: channel, on: server)
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}
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// MARK: Public API
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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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public static func getMessages(for channel: UInt64, on server: String) -> Promise<[LokiPublicChatMessage]> {
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var queryParameters = "include_annotations=1"
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if let lastMessageServerID = getLastMessageServerID(for: channel, on: server) {
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queryParameters += "&since_id=\(lastMessageServerID)"
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} else {
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queryParameters += "&count=\(fallbackBatchCount)&include_deleted=0"
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}
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let url = URL(string: "\(server)/channels/\(channel)/messages?\(queryParameters)")!
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let request = TSRequest(url: url)
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return LokiFileServerProxy(for: server).perform(request).map(on: DispatchQueue.global()) { 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 public chat channel with ID: \(channel) on server: \(server) from: \(rawResponse).")
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throw LokiDotNetAPIError.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(where: { $0["type"] as? String == publicChatMessageType }), let value = annotation["value"] as? JSON,
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let serverID = message["id"] as? UInt64, let hexEncodedSignatureData = value["sig"] as? String, let signatureVersion = value["sigver"] as? UInt64,
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let body = message["text"] as? String, let user = message["user"] as? JSON, let hexEncodedPublicKey = user["username"] as? String,
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let timestamp = value["timestamp"] as? UInt64 else {
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print("[Loki] Couldn't parse message for public chat channel with ID: \(channel) on server: \(server) from: \(message).")
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return nil
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}
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var profilePicture: LokiPublicChatMessage.ProfilePicture? = nil
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let displayName = user["name"] as? String ?? NSLocalizedString("Anonymous", comment: "")
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if let userAnnotations = user["annotations"] as? [JSON], let profilePictureAnnotation = userAnnotations.first(where: { $0["type"] as? String == profilePictureType }),
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let profilePictureValue = profilePictureAnnotation["value"] as? JSON, let profileKeyString = profilePictureValue["profileKey"] as? String, let profileKey = Data(base64Encoded: profileKeyString), let url = profilePictureValue["url"] as? String {
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profilePicture = LokiPublicChatMessage.ProfilePicture(profileKey: profileKey, url: url)
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}
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let lastMessageServerID = getLastMessageServerID(for: channel, on: server)
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if serverID > (lastMessageServerID ?? 0) { setLastMessageServerID(for: channel, on: server, to: serverID) }
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let quote: LokiPublicChatMessage.Quote?
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if let quoteAsJSON = value["quote"] as? JSON, let quotedMessageTimestamp = quoteAsJSON["id"] as? UInt64, let quoteeHexEncodedPublicKey = quoteAsJSON["author"] as? String,
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let quotedMessageBody = quoteAsJSON["text"] as? String {
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let quotedMessageServerID = message["reply_to"] as? UInt64
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quote = LokiPublicChatMessage.Quote(quotedMessageTimestamp: quotedMessageTimestamp, quoteeHexEncodedPublicKey: quoteeHexEncodedPublicKey, quotedMessageBody: quotedMessageBody,
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quotedMessageServerID: quotedMessageServerID)
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} else {
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quote = nil
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}
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let signature = LokiPublicChatMessage.Signature(data: Data(hex: hexEncodedSignatureData), version: signatureVersion)
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let attachmentsAsJSON = annotations.filter { $0["type"] as? String == attachmentType }
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let attachments: [LokiPublicChatMessage.Attachment] = attachmentsAsJSON.compactMap { attachmentAsJSON in
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guard let value = attachmentAsJSON["value"] as? JSON, let kindAsString = value["lokiType"] as? String, let kind = LokiPublicChatMessage.Attachment.Kind(rawValue: kindAsString),
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let serverID = value["id"] as? UInt64, let contentType = value["contentType"] as? String, let size = value["size"] as? UInt, let url = value["url"] as? String else { return nil }
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let fileName = value["fileName"] as? String ?? UUID().description
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let width = value["width"] as? UInt ?? 0
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let height = value["height"] as? UInt ?? 0
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let flags = (value["flags"] as? UInt) ?? 0
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let caption = value["caption"] as? String
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let linkPreviewURL = value["linkPreviewUrl"] as? String
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let linkPreviewTitle = value["linkPreviewTitle"] as? String
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if kind == .linkPreview {
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guard linkPreviewURL != nil && linkPreviewTitle != nil else {
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print("[Loki] Ignoring public chat message with invalid link preview.")
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return nil
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}
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}
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return LokiPublicChatMessage.Attachment(kind: kind, server: server, serverID: serverID, contentType: contentType, size: size, fileName: fileName, flags: flags,
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width: width, height: height, caption: caption, url: url, linkPreviewURL: linkPreviewURL, linkPreviewTitle: linkPreviewTitle)
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}
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let result = LokiPublicChatMessage(serverID: serverID, hexEncodedPublicKey: hexEncodedPublicKey, displayName: displayName, profilePicture: profilePicture,
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body: body, type: publicChatMessageType, timestamp: timestamp, quote: quote, attachments: attachments, signature: signature)
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guard result.hasValidSignature() else {
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print("[Loki] Ignoring public chat message with invalid signature.")
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return nil
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}
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var existingMessageID: String? = nil
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storage.dbReadConnection.read { transaction in
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existingMessageID = storage.getIDForMessage(withServerID: UInt(result.serverID!), in: transaction)
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}
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guard existingMessageID == nil else {
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print("[Loki] Ignoring duplicate public chat message.")
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return nil
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}
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return result
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}.sorted { $0.timestamp < $1.timestamp }
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}
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}
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@objc(sendMessage:toGroup:onServer:)
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public static func objc_sendMessage(_ message: LokiPublicChatMessage, 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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public static func sendMessage(_ message: LokiPublicChatMessage, to channel: UInt64, on server: String) -> Promise<LokiPublicChatMessage> {
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print("[Loki] Sending message to public chat channel with ID: \(channel) on server: \(server).")
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let (promise, seal) = Promise<LokiPublicChatMessage>.pending()
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let queue = DispatchQueue.global()
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queue.async { [privateKey = userKeyPair.privateKey] in
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guard let signedMessage = message.sign(with: privateKey) else { return seal.reject(LokiDotNetAPIError.signingFailed) }
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attempt(maxRetryCount: maxRetryCount, recoveringOn: queue) {
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getAuthToken(for: server).then { token -> Promise<LokiPublicChatMessage> in
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let url = URL(string: "\(server)/channels/\(channel)/messages")!
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let parameters = signedMessage.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 LokiFileServerProxy(for: server).perform(request).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 public chat channel with ID: \(channel) on server: \(server) from: \(rawResponse).")
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throw LokiDotNetAPIError.parsingFailed
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}
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let timestamp = UInt64(date.timeIntervalSince1970) * 1000
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return LokiPublicChatMessage(serverID: serverID, hexEncodedPublicKey: getUserHexEncodedPublicKey(), displayName: displayName, profilePicture: signedMessage.profilePicture, body: body, type: publicChatMessageType, timestamp: timestamp, quote: signedMessage.quote, attachments: signedMessage.attachments, signature: signedMessage.signature)
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}
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}.recover { error -> Promise<LokiPublicChatMessage> 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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}
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}.done { message in
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seal.fulfill(message)
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}.catch { error in
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seal.reject(error)
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}
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}
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return promise
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}
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public static func getDeletedMessageServerIDs(for channel: UInt64, on server: String) -> Promise<[UInt64]> {
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print("[Loki] Getting deleted messages for public chat channel with ID: \(channel) on server: \(server).")
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let queryParameters: String
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if let lastDeletionServerID = getLastDeletionServerID(for: channel, 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/\(channel)/deletes?\(queryParameters)")!
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let request = TSRequest(url: url)
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return LokiFileServerProxy(for: server).perform(request).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 public chat channel with ID: \(channel) on server: \(server) from: \(rawResponse).")
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throw LokiDotNetAPIError.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 public chat channel with ID: \(channel) on server: \(server) from: \(deletion).")
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return nil
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}
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let lastDeletionServerID = getLastDeletionServerID(for: channel, on: server)
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if serverID > (lastDeletionServerID ?? 0) { setLastDeletionServerID(for: channel, 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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@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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public static func deleteMessage(with messageID: UInt, for channel: UInt64, on server: String, isSentByUser: Bool) -> Promise<Void> {
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return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global()) {
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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 public chat channel with ID: \(channel) on server: \(server) (isModerationRequest = \(isModerationRequest)).")
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let urlAsString = isSentByUser ? "\(server)/channels/\(channel)/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 LokiFileServerProxy(for: server).perform(request).done { result -> Void in
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print("[Loki] Deleted message with ID: \(messageID) on server: \(server).")
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}
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}
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}
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}
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public static func getModerators(for channel: UInt64, on server: String) -> Promise<Set<String>> {
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let url = URL(string: "\(server)/loki/v1/channel/\(channel)/get_moderators")!
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let request = TSRequest(url: url)
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return LokiFileServerProxy(for: server).perform(request).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 public chat channel with ID: \(channel) on server: \(server) from: \(rawResponse).")
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throw LokiDotNetAPIError.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]![channel] = moderatorAsSet
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} else {
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self.moderators[server] = [ channel : moderatorAsSet ]
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}
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return moderatorAsSet
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}
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}
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public static func join(_ channel: UInt64, on server: String) -> Promise<Void> {
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return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global()) {
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getAuthToken(for: server).then { token -> Promise<Void> in
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let url = URL(string: "\(server)/channels/\(channel)/subscribe")!
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let request = TSRequest(url: url, method: "POST", parameters: [:])
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request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
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return LokiFileServerProxy(for: server).perform(request).done { result -> Void in
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print("[Loki] Joined channel with ID: \(channel) on server: \(server).")
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}
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}
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}
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}
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public static func leave(_ channel: UInt64, on server: String) -> Promise<Void> {
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return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global()) {
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getAuthToken(for: server).then { token -> Promise<Void> in
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let url = URL(string: "\(server)/channels/\(channel)/subscribe")!
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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 LokiFileServerProxy(for: server).perform(request).done { result -> Void in
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print("[Loki] Left channel with ID: \(channel) on server: \(server).")
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}
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}
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}
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}
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public static func getDisplayNames(for channel: UInt64, on server: String) -> Promise<Void> {
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let publicChatID = "\(server).\(channel)"
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guard let hexEncodedPublicKeys = displayNameUpdatees[publicChatID] else { return Promise.value(()) }
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displayNameUpdatees[publicChatID] = []
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print("[Loki] Getting display names for: \(hexEncodedPublicKeys).")
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return getAuthToken(for: server).then { token -> Promise<Void> in
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let queryParameters = "ids=\(hexEncodedPublicKeys.map { "@\($0)" }.joined(separator: ","))&include_user_annotations=1"
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let url = URL(string: "\(server)/users?\(queryParameters)")!
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let request = TSRequest(url: url)
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return LokiFileServerProxy(for: server).perform(request).map { rawResponse in
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guard let json = rawResponse as? JSON, let data = json["data"] as? [JSON] else {
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print("[Loki] Couldn't parse display names for users: \(hexEncodedPublicKeys) from: \(rawResponse).")
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throw LokiDotNetAPIError.parsingFailed
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}
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storage.dbReadWriteConnection.readWrite { transaction in
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data.forEach { data in
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guard let user = data["user"] as? JSON, let hexEncodedPublicKey = user["username"] as? String, let rawDisplayName = user["name"] as? String else { return }
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let endIndex = hexEncodedPublicKey.endIndex
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let cutoffIndex = hexEncodedPublicKey.index(endIndex, offsetBy: -8)
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let displayName = "\(rawDisplayName) (...\(hexEncodedPublicKey[cutoffIndex..<endIndex]))"
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transaction.setObject(displayName, forKey: hexEncodedPublicKey, inCollection: "\(server).\(channel)")
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}
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}
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}
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}
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}
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@objc(isUserModerator:forChannel:onServer:)
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public static func isUserModerator(_ hexEncodedPublicString: String, for channel: UInt64, on server: String) -> Bool {
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return moderators[server]?[channel]?.contains(hexEncodedPublicString) ?? false
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}
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@objc(setDisplayName:on:)
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public static func objc_setDisplayName(to newDisplayName: String?, on server: String) -> AnyPromise {
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return AnyPromise.from(setDisplayName(to: newDisplayName, on: server))
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}
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public static func setDisplayName(to newDisplayName: String?, on server: String) -> Promise<Void> {
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print("[Loki] Updating display name on server: \(server).")
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return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global()) {
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getAuthToken(for: server).then { token -> Promise<Void> in
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let parameters: JSON = [ "name" : (newDisplayName ?? "") ]
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let url = URL(string: "\(server)/users/me")!
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let request = TSRequest(url: url, method: "PATCH", parameters: parameters)
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request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
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return LokiFileServerProxy(for: server).perform(request).map { _ in }.recover { error in
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print("Couldn't update display name due to error: \(error).")
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throw error
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}
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}
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}
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}
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@objc(setProfilePictureURL:usingProfileKey:on:)
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public static func objc_setProfilePicture(to url: String?, using profileKey: Data, on server: String) -> AnyPromise {
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return AnyPromise.from(setProfilePictureURL(to: url, using: profileKey, on: server))
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}
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public static func setProfilePictureURL(to url: String?, using profileKey: Data, on server: String) -> Promise<Void> {
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print("[Loki] Updating profile picture on server: \(server).")
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return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global()) {
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getAuthToken(for: server).then { token -> Promise<Void> in
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var annotation: JSON = [ "type" : profilePictureType ]
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|
if let url = url {
|
|
annotation["value"] = [ "profileKey" : profileKey.base64EncodedString(), "url" : url ]
|
|
}
|
|
let parameters: JSON = [ "annotations" : [ annotation ] ]
|
|
let url = URL(string: "\(server)/users/me")!
|
|
let request = TSRequest(url: url, method: "PATCH", parameters: parameters)
|
|
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
|
|
return LokiFileServerProxy(for: server).perform(request).map { _ in }.recover { error in
|
|
print("[Loki] Couldn't update profile picture due to error: \(error).")
|
|
throw error
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@objc(getInfoForChannelWithID:onServer:)
|
|
public static func objc_getInfo(for channel: UInt64, on server: String) -> AnyPromise {
|
|
return AnyPromise.from(getInfo(for: channel, on: server))
|
|
}
|
|
|
|
public static func getInfo(for channel: UInt64, on server: String) -> Promise<LokiPublicChatInfo> {
|
|
let url = URL(string: "\(server)/channels/\(channel)?include_annotations=1")!
|
|
let request = TSRequest(url: url)
|
|
return LokiFileServerProxy(for: server).perform(request).map { rawResponse in
|
|
guard let json = rawResponse as? JSON,
|
|
let data = json["data"] as? JSON,
|
|
let annotations = data["annotations"] as? [JSON],
|
|
let annotation = annotations.first,
|
|
let info = annotation["value"] as? JSON,
|
|
let displayName = info["name"] as? String,
|
|
let countInfo = data["counts"] as? JSON,
|
|
let memberCount = countInfo["subscribers"] as? Int else {
|
|
print("[Loki] Couldn't parse info for public chat channel with ID: \(channel) on server: \(server) from: \(rawResponse).")
|
|
throw LokiDotNetAPIError.parsingFailed
|
|
}
|
|
let storage = OWSPrimaryStorage.shared()
|
|
storage.dbReadWriteConnection.readWrite { transaction in
|
|
storage.setUserCount(memberCount, forPublicChatWithID: "\(server).\(channel)", in: transaction)
|
|
}
|
|
// TODO: Use this to update open group names as needed
|
|
return LokiPublicChatInfo(displayName: displayName, memberCount: memberCount)
|
|
}
|
|
}
|
|
|
|
@objc(reportMessageWithID:inChannel:onServer:)
|
|
public static func objc_reportMessageWithID(_ messageID: UInt64, in channel: UInt64, on server: String) -> AnyPromise {
|
|
return AnyPromise.from(reportMessageWithID(messageID, in: channel, on: server))
|
|
}
|
|
|
|
public static func reportMessageWithID(_ messageID: UInt64, in channel: UInt64, on server: String) -> Promise<Void> {
|
|
let url = URL(string: "\(server)/loki/v1/channels/\(channel)/messages/\(messageID)/report")!
|
|
let request = TSRequest(url: url, method: "POST", parameters: [:])
|
|
return LokiFileServerProxy(for: server).perform(request).map { _ in }
|
|
}
|
|
}
|