WIP - Complete App refactoring

Nextcloud Cookbook iOS Client/Networking/NextcloudApi/NextcloudApi.swift

@@ -0,0 +1,122 @@
+//
+//  NextcloudApi.swift
+//  Nextcloud Cookbook iOS Client
+//
+//  Created by Vincent Meilinger on 16.11.23.
+//
+
+import Foundation
+import SwiftUI
+
+/// The `NextcloudApi` class provides functionalities to interact with the Nextcloud API, particularly for user authentication.
+class NextcloudApi {
+    
+    /// Initiates the login process with Nextcloud using the Login Flow v2.
+    ///
+    /// This static function sends a POST request to the Nextcloud server to obtain a `LoginV2Request` object.
+    /// The object contains necessary details for the second step of the authentication process.
+    ///
+    /// - Returns: A tuple containing an optional `LoginV2Request` and an optional `NetworkError`.
+    ///   - `LoginV2Request?`: An object containing the necessary information for the second step of the login process, if successful.
+    ///   - `NetworkError?`: An error encountered during the network request, if any.
+
+    static func loginV2Request() async -> (LoginV2Request?, NetworkError?) {
+        let path = UserSettings.shared.serverProtocol + UserSettings.shared.serverAddress
+        let request = ApiRequest(
+            path: path + "/index.php/login/v2",
+            method: .POST
+        )
+        
+        let (data, error) = await request.send(pathCompletion: false)
+        
+        if let error = error {
+            return (nil, error)
+        }
+        guard let data = data else {
+            return (nil, NetworkError.dataError)
+        }
+        guard let loginRequest: LoginV2Request = JSONDecoder.safeDecode(data) else {
+            return (nil, NetworkError.decodingFailed)
+        }
+        return (loginRequest, nil)
+    }
+    
+    /// Completes the user authentication process with Nextcloud using the Login Flow v2.
+    ///
+    /// This static function sends a POST request to the Nextcloud server with the login token obtained from `loginV2Request`.
+    /// On successful validation of the token, it returns a `LoginV2Response` object, completing the user login.
+    ///
+    /// - Parameter req: A `LoginV2Request` object containing the token and endpoint information for the authentication request.
+    ///
+    /// - Returns: A tuple containing an optional `LoginV2Response` and an optional `NetworkError`.
+    ///   - `LoginV2Response?`: An object representing the response of the login process, if successful.
+    ///   - `NetworkError?`: An error encountered during the network request, if any.
+
+    static func loginV2Response(req: LoginV2Request) async -> (LoginV2Response?, NetworkError?) {
+        let request = ApiRequest(
+            path: req.poll.endpoint,
+            method: .POST,
+            headerFields: [
+                HeaderField.ocsRequest(value: true),
+                HeaderField.accept(value: .JSON),
+                HeaderField.contentType(value: .FORM)
+            ],
+            body: "token=\(req.poll.token)".data(using: .utf8)
+        )
+        let (data, error) = await request.send(pathCompletion: false)
+        
+        if let error = error {
+            return (nil, error)
+        }
+        guard let data = data else {
+            return (nil, NetworkError.dataError)
+        }
+        guard let loginResponse: LoginV2Response = JSONDecoder.safeDecode(data) else {
+            return (nil, NetworkError.decodingFailed)
+        }
+        return (loginResponse, nil)
+    }
+    
+    static func getAvatar() async -> (UIImage?, NetworkError?) {
+        let request = ApiRequest(
+            path: "/index.php/avatar/\(UserSettings.shared.username)/100",
+            method: .GET,
+            authString: UserSettings.shared.authString,
+            headerFields: [HeaderField.ocsRequest(value: true), HeaderField.accept(value: .IMAGE)]
+        )
+        
+        let (data, error) = await request.send()
+        guard let data = data else { return (nil, error) }
+        return (UIImage(data: data), error)
+    }
+    
+    static func getHoverCard() async -> (UserData?, NetworkError?) {
+        let request = ApiRequest(
+            path: "/ocs/v2.php/hovercard/v1/\(UserSettings.shared.username)",
+            method: .GET,
+            authString: UserSettings.shared.authString,
+            headerFields: [HeaderField.ocsRequest(value: true), HeaderField.accept(value: .JSON)]
+        )
+        
+        let (data, error) = await request.send()
+        guard let data = data else { return (nil, error) }
+        do {
+            let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
+            let data = (json?["ocs"] as? [String: Any])?["data"] as? [String: Any]
+            let userData = UserData(
+                userId: data?["userId"] as? String ?? "",
+                userDisplayName: data?["displayName"] as? String ?? ""
+            )
+            print(userData)
+            return (userData, nil)
+        } catch {
+            print(error.localizedDescription)
+            return (nil, NetworkError.decodingFailed)
+        }
+    }
+}
+
+struct UserData {
+    let userId: String
+    let userDisplayName: String
+}