Fix code duplication

SignalServiceKit/src/Loki/API/LokiStorageAPI.swift

@@ -27,7 +27,7 @@ public final class LokiStorageAPI : LokiDotNetAPI {
     public static func getDeviceLinks(associatedWith hexEncodedPublicKeys: Set<String>) -> Promise<Set<DeviceLink>> {
         let hexEncodedPublicKeysDescription = "[ \(hexEncodedPublicKeys.joined(separator: ", ")) ]"
         print("[Loki] Getting device links for: \(hexEncodedPublicKeysDescription).")
-        return getAuthToken(for: server).then(on: DispatchQueue.global()) { token -> Promise<Set<DeviceLink>> in
+        return getAuthToken(for: server).then(on: DispatchQueue.main) { token -> Promise<Set<DeviceLink>> in
             let queryParameters = "ids=\(hexEncodedPublicKeys.map { "@\($0)" }.joined(separator: ","))&include_user_annotations=1"
             let url = URL(string: "\(server)/users?\(queryParameters)")!
             let request = TSRequest(url: url)
@@ -134,80 +134,6 @@ public final class LokiStorageAPI : LokiDotNetAPI {
         return AnyPromise.from(getDeviceLinks(associatedWith: hexEncodedPublicKey))
     }
     
-    // MARK: Attachments (Public API)
-    public static func uploadAttachment(_ attachment: TSAttachmentStream, attachmentID: String) -> Promise<Void> {
-        return Promise<Void>() { seal in
-            getAuthToken(for: server).done { token in
-                // Encrypt the attachment
-                guard let unencryptedAttachmentData = try? attachment.readDataFromFile() else {
-                    print("[Loki] Couldn't read attachment data from disk.")
-                    return seal.reject(Error.generic)
-                }
-                var encryptionKey = NSData()
-                var digest = NSData()
-                guard let encryptedAttachmentData = Cryptography.encryptAttachmentData(unencryptedAttachmentData, outKey: &encryptionKey, outDigest: &digest) else {
-                    print("[Loki] Couldn't encrypt attachment.")
-                    return seal.reject(Error.encryptionFailed)
-                }
-                attachment.encryptionKey = encryptionKey as Data
-                attachment.digest = digest as Data
-                // Create the request
-                let url = "\(server)/files"
-                let parameters: JSON = [ "type" : attachmentType, "Content-Type" : "application/binary" ]
-                var error: NSError?
-                var request = AFHTTPRequestSerializer().multipartFormRequest(withMethod: "POST", urlString: url, parameters: parameters, constructingBodyWith: { formData in
-                    formData.appendPart(withFileData: encryptedAttachmentData, name: "content", fileName: UUID().uuidString, mimeType: "application/binary")
-                }, error: &error)
-                request.addValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-                if let error = error {
-                    print("[Loki] Couldn't upload attachment due to error: \(error).")
-                    throw error
-                }
-                // Send the request
-                let task = AFURLSessionManager(sessionConfiguration: .default).uploadTask(withStreamedRequest: request as URLRequest, progress: { rawProgress in
-                    // Broadcast progress updates
-                    let progress = max(0.1, rawProgress.fractionCompleted)
-                    let userInfo: [String:Any] = [ kAttachmentUploadProgressKey : progress, kAttachmentUploadAttachmentIDKey : attachmentID ]
-                    DispatchQueue.main.async {
-                        NotificationCenter.default.post(name: .attachmentUploadProgress, object: nil, userInfo: userInfo)
-                    }
-                }, completionHandler: { response, responseObject, error in
-                    if let error = error {
-                        print("[Loki] Couldn't upload attachment due to error: \(error).")
-                        return seal.reject(error)
-                    }
-                    let statusCode = (response as! HTTPURLResponse).statusCode
-                    let isSuccessful = (200...299) ~= statusCode
-                    guard isSuccessful else {
-                        print("[Loki] Couldn't upload attachment.")
-                        return seal.reject(Error.generic)
-                    }
-                    // Parse the server ID & download URL
-                    guard let json = responseObject as? JSON, let data = json["data"] as? JSON, let serverID = data["id"] as? UInt64, let downloadURL = data["url"] as? String else {
-                        print("[Loki] Couldn't parse attachment from: \(responseObject).")
-                        return seal.reject(Error.parsingFailed)
-                    }
-                    // Update the attachment
-                    attachment.serverId = serverID
-                    attachment.isUploaded = true
-                    attachment.downloadURL = downloadURL
-                    attachment.save()
-                    return seal.fulfill(())
-                })
-                task.resume()
-            }.catch { error in
-                print("[Loki] Couldn't upload attachment.")
-                seal.reject(error)
-            }
-        }
-    }
-    
-    // MARK: Attachments (Public Obj-C API)
-    @objc(uploadAttachment:withID:)
-    public static func objc_uploadAttachment(_ attachment: TSAttachmentStream, attachmentID: String) -> AnyPromise {
-        return AnyPromise.from(uploadAttachment(attachment, attachmentID: attachmentID))
-    }
-    
     // MARK: Profile Pictures (Public API)
     public static func setProfilePicture(_ profilePicture: Data) -> Promise<String> {
         return Promise<String>() { seal in