import AFNetworking
import PromiseKit
import SessionSnodeKit
import SessionUtilitiesKit
@objc(SNOpenGroupAPI)
public final class OpenGroupAPI : DotNetAPI {
private static var moderators: [String:[UInt64:Set<String>]] = [:] // Server URL to (channel ID to set of moderator IDs)
public static var displayNameUpdatees: [String:Set<String>] = [:]
// MARK: Settings
private static let attachmentType = "net.app.core.oembed"
private static let channelInfoType = "net.patter-app.settings"
private static let fallbackBatchCount = 64
private static let maxRetryCount: UInt = 4
public static let profilePictureType = "network.loki.messenger.avatar"
@objc public static let openGroupMessageType = "network.loki.messenger.publicChat"
// MARK: Open Group Public Key Validation
public static func getOpenGroupServerPublicKey(for server: String) -> Promise<String> {
if let publicKey = SNMessagingKitConfiguration.shared.storage.getOpenGroupPublicKey(for: server) {
return Promise.value(publicKey)
} else {
return FileServerAPI.getPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { publicKey -> Promise<String> in
let url = URL(string: server)!
let request = TSRequest(url: url)
return OnionRequestAPI.sendOnionRequest(request, to: server, using: publicKey, isJSONRequired: false).map(on: DispatchQueue.global(qos: .default)) { _ -> String in
SNMessagingKitConfiguration.shared.storage.writeSync { transaction in
SNMessagingKitConfiguration.shared.storage.setOpenGroupPublicKey(for: server, to: publicKey, using: transaction)
}
return publicKey
}
}
}
}
// MARK: Receiving
@objc(getMessagesForGroup:onServer:)
public static func objc_getMessages(for group: UInt64, on server: String) -> AnyPromise {
return AnyPromise.from(getMessages(for: group, on: server))
}
public static func getMessages(for channel: UInt64, on server: String) -> Promise<[OpenGroupMessage]> {
let storage = SNMessagingKitConfiguration.shared.storage
var queryParameters = "include_annotations=1"
if let lastMessageServerID = storage.getLastMessageServerID(for: channel, on: server) {
queryParameters += "&since_id=\(lastMessageServerID)"
} else {
queryParameters += "&count=\(fallbackBatchCount)&include_deleted=0"
}
return getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<[OpenGroupMessage]> in
let url = URL(string: "\(server)/channels/\(channel)/messages?\(queryParameters)")!
let request = TSRequest(url: url)
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
guard let rawMessages = json["data"] as? [JSON] else {
SNLog("Couldn't parse messages for open group channel with ID: \(channel) on server: \(server) from: \(json).")
throw Error.parsingFailed
}
return rawMessages.compactMap { message in
let isDeleted = (message["is_deleted"] as? Int == 1)
guard !isDeleted else { return nil }
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
guard let annotations = message["annotations"] as? [JSON], let annotation = annotations.first(where: { $0["type"] as? String == openGroupMessageType }), let value = annotation["value"] as? JSON,
let serverID = message["id"] as? UInt64, let hexEncodedSignatureData = value["sig"] as? String, let signatureVersion = value["sigver"] as? UInt64,
let body = message["text"] as? String, let user = message["user"] as? JSON, let hexEncodedPublicKey = user["username"] as? String,
let timestamp = value["timestamp"] as? UInt64, let dateAsString = message["created_at"] as? String, let date = dateFormatter.date(from: dateAsString) else {
SNLog("Couldn't parse message for open group channel with ID: \(channel) on server: \(server) from: \(message).")
return nil
}
let serverTimestamp = UInt64(date.timeIntervalSince1970) * 1000
var profilePicture: OpenGroupMessage.ProfilePicture? = nil
let displayName = user["name"] as? String ?? NSLocalizedString("Anonymous", comment: "")
if let userAnnotations = user["annotations"] as? [JSON], let profilePictureAnnotation = userAnnotations.first(where: { $0["type"] as? String == profilePictureType }),
let profilePictureValue = profilePictureAnnotation["value"] as? JSON, let profileKeyString = profilePictureValue["profileKey"] as? String, let profileKey = Data(base64Encoded: profileKeyString), let url = profilePictureValue["url"] as? String {
profilePicture = OpenGroupMessage.ProfilePicture(profileKey: profileKey, url: url)
}
let lastMessageServerID = storage.getLastMessageServerID(for: channel, on: server)
if serverID > (lastMessageServerID ?? 0) {
storage.writeSync { transaction in
storage.setLastMessageServerID(for: channel, on: server, to: serverID, using: transaction)
}
}
let quote: OpenGroupMessage.Quote?
if let quoteAsJSON = value["quote"] as? JSON, let quotedMessageTimestamp = quoteAsJSON["id"] as? UInt64, let quoteePublicKey = quoteAsJSON["author"] as? String,
let quotedMessageBody = quoteAsJSON["text"] as? String {
let quotedMessageServerID = message["reply_to"] as? UInt64
quote = OpenGroupMessage.Quote(quotedMessageTimestamp: quotedMessageTimestamp, quoteePublicKey: quoteePublicKey, quotedMessageBody: quotedMessageBody,
quotedMessageServerID: quotedMessageServerID)
} else {
quote = nil
}
let signature = OpenGroupMessage.Signature(data: Data(hex: hexEncodedSignatureData), version: signatureVersion)
let attachmentsAsJSON = annotations.filter { $0["type"] as? String == attachmentType }
let attachments: [OpenGroupMessage.Attachment] = attachmentsAsJSON.compactMap { attachmentAsJSON in
guard let value = attachmentAsJSON["value"] as? JSON, let kindAsString = value["lokiType"] as? String, let kind = OpenGroupMessage.Attachment.Kind(rawValue: kindAsString),
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 }
let fileName = value["fileName"] as? String ?? UUID().description
let width = value["width"] as? UInt ?? 0
let height = value["height"] as? UInt ?? 0
let flags = (value["flags"] as? UInt) ?? 0
let caption = value["caption"] as? String
let linkPreviewURL = value["linkPreviewUrl"] as? String
let linkPreviewTitle = value["linkPreviewTitle"] as? String
if kind == .linkPreview {
guard linkPreviewURL != nil && linkPreviewTitle != nil else {
SNLog("Ignoring open group message with invalid link preview.")
return nil
}
}
return OpenGroupMessage.Attachment(kind: kind, server: server, serverID: serverID, contentType: contentType, size: size, fileName: fileName, flags: flags,
width: width, height: height, caption: caption, url: url, linkPreviewURL: linkPreviewURL, linkPreviewTitle: linkPreviewTitle)
}
let result = OpenGroupMessage(serverID: serverID, senderPublicKey: hexEncodedPublicKey, displayName: displayName, profilePicture: profilePicture,
body: body, type: openGroupMessageType, timestamp: timestamp, quote: quote, attachments: attachments, signature: signature, serverTimestamp: serverTimestamp)
guard result.hasValidSignature() else {
SNLog("Ignoring open group message with invalid signature.")
return nil
}
let existingMessageID = storage.getIDForMessage(withServerID: result.serverID!)
guard existingMessageID == nil else {
SNLog("Ignoring duplicate open group message.")
return nil
}
return result
}.sorted { $0.serverTimestamp < $1.serverTimestamp}
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
// MARK: Sending
@objc(sendMessage:toGroup:onServer:)
public static func objc_sendMessage(_ message: OpenGroupMessage, to group: UInt64, on server: String) -> AnyPromise {
return AnyPromise.from(sendMessage(message, to: group, on: server))
}
public static func sendMessage(_ message: OpenGroupMessage, to channel: UInt64, on server: String) -> Promise<OpenGroupMessage> {
SNLog("Sending message to open group channel with ID: \(channel) on server: \(server).")
let storage = SNMessagingKitConfiguration.shared.storage
guard let userKeyPair = storage.getUserKeyPair() else { return Promise(error: Error.generic) }
guard let userDisplayName = storage.getUserDisplayName() else { return Promise(error: Error.generic) }
let (promise, seal) = Promise<OpenGroupMessage>.pending()
DispatchQueue.global(qos: .userInitiated).async { [privateKey = userKeyPair.privateKey] in
guard let signedMessage = message.sign(with: privateKey) else { return seal.reject(Error.signingFailed) }
attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<OpenGroupMessage> in
let url = URL(string: "\(server)/channels/\(channel)/messages")!
let parameters = signedMessage.toJSON()
let request = TSRequest(url: url, method: "POST", parameters: parameters)
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
let displayName = userDisplayName
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
// ISO8601DateFormatter doesn't support milliseconds before iOS 11
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
guard let messageAsJSON = json["data"] as? JSON, let serverID = messageAsJSON["id"] as? UInt64, let body = messageAsJSON["text"] as? String,
let dateAsString = messageAsJSON["created_at"] as? String, let date = dateFormatter.date(from: dateAsString) else {
SNLog("Couldn't parse message for open group channel with ID: \(channel) on server: \(server) from: \(json).")
throw Error.parsingFailed
}
let timestamp = UInt64(date.timeIntervalSince1970) * 1000
return OpenGroupMessage(serverID: serverID, senderPublicKey: userKeyPair.publicKey.toHexString(), displayName: displayName, profilePicture: signedMessage.profilePicture, body: body, type: openGroupMessageType, timestamp: timestamp, quote: signedMessage.quote, attachments: signedMessage.attachments, signature: signedMessage.signature, serverTimestamp: timestamp)
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}.done(on: DispatchQueue.global(qos: .default)) { message in
seal.fulfill(message)
}.catch(on: DispatchQueue.global(qos: .default)) { error in
seal.reject(error)
}
}
return promise
}
// MARK: Deletion
public static func getDeletedMessageServerIDs(for channel: UInt64, on server: String) -> Promise<[UInt64]> {
SNLog("Getting deleted messages for open group channel with ID: \(channel) on server: \(server).")
let storage = SNMessagingKitConfiguration.shared.storage
let queryParameters: String
if let lastDeletionServerID = storage.getLastDeletionServerID(for: channel, on: server) {
queryParameters = "since_id=\(lastDeletionServerID)"
} else {
queryParameters = "count=\(fallbackBatchCount)"
}
return getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<[UInt64]> in
let url = URL(string: "\(server)/loki/v1/channel/\(channel)/deletes?\(queryParameters)")!
let request = TSRequest(url: url)
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
guard let body = json["body"] as? JSON, let deletions = body["data"] as? [JSON] else {
SNLog("Couldn't parse deleted messages for open group channel with ID: \(channel) on server: \(server) from: \(json).")
throw Error.parsingFailed
}
return deletions.compactMap { deletion in
guard let serverID = deletion["id"] as? UInt64, let messageServerID = deletion["message_id"] as? UInt64 else {
SNLog("Couldn't parse deleted message for open group channel with ID: \(channel) on server: \(server) from: \(deletion).")
return nil
}
let lastDeletionServerID = storage.getLastDeletionServerID(for: channel, on: server)
if serverID > (lastDeletionServerID ?? 0) {
storage.writeSync { transaction in
storage.setLastDeletionServerID(for: channel, on: server, to: serverID, using: transaction)
}
}
return messageServerID
}
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
@objc(deleteMessageWithID:forGroup:onServer:isSentByUser:)
public static func objc_deleteMessage(with messageID: UInt, for group: UInt64, on server: String, isSentByUser: Bool) -> AnyPromise {
return AnyPromise.from(deleteMessage(with: messageID, for: group, on: server, isSentByUser: isSentByUser))
}
public static func deleteMessage(with messageID: UInt, for channel: UInt64, on server: String, isSentByUser: Bool) -> Promise<Void> {
let isModerationRequest = !isSentByUser
SNLog("Deleting message with ID: \(messageID) for open group channel with ID: \(channel) on server: \(server) (isModerationRequest = \(isModerationRequest)).")
let urlAsString = isSentByUser ? "\(server)/channels/\(channel)/messages/\(messageID)" : "\(server)/loki/v1/moderation/message/\(messageID)"
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
let url = URL(string: urlAsString)!
let request = TSRequest(url: url, method: "DELETE", parameters: [:])
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey, isJSONRequired: false).done(on: DispatchQueue.global(qos: .default)) { _ -> Void in
SNLog("Deleted message with ID: \(messageID) on server: \(server).")
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
// MARK: Display Name & Profile Picture
public static func getDisplayNames(for channel: UInt64, on server: String) -> Promise<Void> {
let openGroupID = "\(server).\(channel)"
guard let publicKeys = displayNameUpdatees[openGroupID] else { return Promise.value(()) }
displayNameUpdatees[openGroupID] = []
SNLog("Getting display names for: \(publicKeys).")
return getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
let queryParameters = "ids=\(publicKeys.map { "@\($0)" }.joined(separator: ","))&include_user_annotations=1"
let url = URL(string: "\(server)/users?\(queryParameters)")!
let request = TSRequest(url: url)
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
guard let data = json["data"] as? [JSON] else {
SNLog("Couldn't parse display names for users: \(publicKeys) from: \(json).")
throw Error.parsingFailed
}
let storage = SNMessagingKitConfiguration.shared.storage
storage.writeSync { transaction in
data.forEach { data in
guard let user = data["user"] as? JSON, let hexEncodedPublicKey = user["username"] as? String, let rawDisplayName = user["name"] as? String else { return }
let endIndex = hexEncodedPublicKey.endIndex
let cutoffIndex = hexEncodedPublicKey.index(endIndex, offsetBy: -8)
let displayName = "\(rawDisplayName) (...\(hexEncodedPublicKey[cutoffIndex..<endIndex]))"
storage.setOpenGroupDisplayName(to: displayName, for: hexEncodedPublicKey, inOpenGroupWithID: "\(server).\(channel)", using: transaction)
}
}
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
@objc(setDisplayName:on:)
public static func objc_setDisplayName(to newDisplayName: String?, on server: String) -> AnyPromise {
return AnyPromise.from(setDisplayName(to: newDisplayName, on: server))
}
public static func setDisplayName(to newDisplayName: String?, on server: String) -> Promise<Void> {
SNLog("Updating display name on server: \(server).")
let parameters: JSON = [ "name" : (newDisplayName ?? "") ]
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
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 OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { _ in }.recover(on: DispatchQueue.global(qos: .default)) { error in
print("Couldn't update display name due to error: \(error).")
throw error
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
@objc(setProfilePictureURL:usingProfileKey:on:)
public static func objc_setProfilePicture(to url: String?, using profileKey: Data, on server: String) -> AnyPromise {
return AnyPromise.from(setProfilePictureURL(to: url, using: profileKey, on: server))
}
public static func setProfilePictureURL(to url: String?, using profileKey: Data, on server: String) -> Promise<Void> {
SNLog("Updating profile picture on server: \(server).")
var annotation: JSON = [ "type" : profilePictureType ]
if let url = url {
annotation["value"] = [ "profileKey" : profileKey.base64EncodedString(), "url" : url ]
}
let parameters: JSON = [ "annotations" : [ annotation ] ]
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
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 OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { _ in }.recover(on: DispatchQueue.global(qos: .default)) { error in
SNLog("Couldn't update profile picture due to error: \(error).")
throw error
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
// MARK: Joining & Leaving
@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<OpenGroupInfo> {
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<OpenGroupInfo> in
let url = URL(string: "\(server)/channels/\(channel)?include_annotations=1")!
let request = TSRequest(url: url)
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
guard 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 profilePictureURL = info["avatar"] as? String,
let countInfo = data["counts"] as? JSON,
let memberCount = countInfo["subscribers"] as? Int else {
SNLog("Couldn't parse info for open group channel with ID: \(channel) on server: \(server) from: \(json).")
throw Error.parsingFailed
}
let storage = SNMessagingKitConfiguration.shared.storage
storage.writeSync { transaction in
storage.setUserCount(to: memberCount, forOpenGroupWithID: "\(server).\(channel)", using: transaction)
}
let openGroupInfo = OpenGroupInfo(displayName: displayName, profilePictureURL: profilePictureURL, memberCount: memberCount)
OpenGroupAPI.updateProfileIfNeeded(for: channel, on: server, from: openGroupInfo)
return openGroupInfo
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
public static func updateProfileIfNeeded(for channel: UInt64, on server: String, from info: OpenGroupInfo) {
let openGroupID = "\(server).\(channel)"
SNMessagingKitConfiguration.shared.storage.write { transaction in
let transaction = transaction as! YapDatabaseReadWriteTransaction
// Update user count
Storage.shared.setUserCount(to: info.memberCount, forOpenGroupWithID: openGroupID, using: transaction)
let thread = TSGroupThread.getOrCreateThread(withGroupId: openGroupID.data(using: .utf8)!, groupType: .openGroup, transaction: transaction)
// Update display name if needed
let model = thread.groupModel
if model.groupName != info.displayName {
let newGroupModel = TSGroupModel(title: info.displayName, memberIds: model.groupMemberIds, image: model.groupImage, groupId: model.groupId, groupType: model.groupType, adminIds: model.groupAdminIds)
thread.groupModel = newGroupModel
thread.save(with: transaction)
}
// Download and update profile picture if needed
let oldProfilePictureURL = Storage.shared.getProfilePictureURL(forOpenGroupWithID: openGroupID)
if oldProfilePictureURL != info.profilePictureURL || model.groupImage == nil {
Storage.shared.setProfilePictureURL(to: info.profilePictureURL, forOpenGroupWithID: openGroupID, using: transaction)
if let profilePictureURL = info.profilePictureURL {
var sanitizedServerURL = server
while sanitizedServerURL.hasSuffix("/") { sanitizedServerURL.removeLast() }
var sanitizedProfilePictureURL = profilePictureURL
while sanitizedProfilePictureURL.hasPrefix("/") { sanitizedProfilePictureURL.removeFirst() }
let url = "\(sanitizedServerURL)/\(sanitizedProfilePictureURL)"
FileServerAPI.downloadAttachment(from: url).map2 { data in
let attachmentStream = TSAttachmentStream(contentType: OWSMimeTypeImageJpeg, byteCount: UInt32(data.count), sourceFilename: nil, caption: nil, albumMessageId: nil)
try attachmentStream.write(data)
thread.updateAvatar(with: attachmentStream)
}
}
}
}
}
public static func join(_ channel: UInt64, on server: String) -> Promise<Void> {
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
let url = URL(string: "\(server)/channels/\(channel)/subscribe")!
let request = TSRequest(url: url, method: "POST", parameters: [:])
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).done(on: DispatchQueue.global(qos: .default)) { _ -> Void in
SNLog("Joined channel with ID: \(channel) on server: \(server).")
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
public static func leave(_ channel: UInt64, on server: String) -> Promise<Void> {
return attempt(maxRetryCount: maxRetryCount, recoveringOn: DispatchQueue.global(qos: .default)) {
getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Void> in
let url = URL(string: "\(server)/channels/\(channel)/subscribe")!
let request = TSRequest(url: url, method: "DELETE", parameters: [:])
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).done(on: DispatchQueue.global(qos: .default)) { _ -> Void in
SNLog("Left channel with ID: \(channel) on server: \(server).")
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
}
// MARK: Reporting
@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: [:])
// Only used for the Loki Public Chat which doesn't require authentication
return getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { _ in }
}
}
// MARK: Moderators
public static func getModerators(for channel: UInt64, on server: String) -> Promise<Set<String>> {
return getOpenGroupServerPublicKey(for: server).then(on: DispatchQueue.global(qos: .default)) { serverPublicKey in
getAuthToken(for: server).then(on: DispatchQueue.global(qos: .default)) { token -> Promise<Set<String>> in
let url = URL(string: "\(server)/loki/v1/channel/\(channel)/get_moderators")!
let request = TSRequest(url: url)
request.allHTTPHeaderFields = [ "Content-Type" : "application/json", "Authorization" : "Bearer \(token)" ]
return OnionRequestAPI.sendOnionRequest(request, to: server, using: serverPublicKey).map(on: DispatchQueue.global(qos: .default)) { json in
guard let moderators = json["moderators"] as? [String] else {
SNLog("Couldn't parse moderators for open group channel with ID: \(channel) on server: \(server) from: \(json).")
throw Error.parsingFailed
}
let moderatorsAsSet = Set(moderators);
if self.moderators.keys.contains(server) {
self.moderators[server]![channel] = moderatorsAsSet
} else {
self.moderators[server] = [ channel : moderatorsAsSet ]
}
return moderatorsAsSet
}
}
}.handlingInvalidAuthTokenIfNeeded(for: server)
}
@objc(isUserModerator:forChannel:onServer:)
public static func isUserModerator(_ hexEncodedPublicString: String, for channel: UInt64, on server: String) -> Bool {
return moderators[server]?[channel]?.contains(hexEncodedPublicString) ?? false
}
}
// MARK: Error Handling
internal extension Promise {
func handlingInvalidAuthTokenIfNeeded(for server: String) -> Promise<T> {
return recover(on: DispatchQueue.global(qos: .userInitiated)) { error -> Promise<T> in
if case OnionRequestAPI.Error.httpRequestFailedAtDestination(let statusCode, _) = error, statusCode == 401 || statusCode == 403 {
SNLog("Auth token for: \(server) expired; dropping it.")
let storage = SNMessagingKitConfiguration.shared.storage
storage.writeSync { transaction in
storage.removeAuthToken(for: server, using: transaction)
}
}
throw error
}
}
}