shlink-manager/lib/API/server_manager.dart

173 lines
5.3 KiB
Dart

import 'dart:async';
import 'package:dartz/dartz.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:shlink_app/API/Classes/ShlinkStats/shlink_stats.dart';
import 'package:shlink_app/API/Classes/ShortURL/short_url.dart';
import 'package:shlink_app/API/Classes/ShortURLSubmission/short_url_submission.dart';
import 'package:shlink_app/API/Methods/connect.dart';
import 'package:shlink_app/API/Methods/get_recent_short_urls.dart';
import 'package:shlink_app/API/Methods/get_server_health.dart';
import 'package:shlink_app/API/Methods/get_shlink_stats.dart';
import 'package:shlink_app/API/Methods/get_short_urls.dart';
import 'package:shlink_app/API/Methods/update_short_url.dart';
import 'Methods/delete_short_url.dart';
import 'Methods/submit_short_url.dart';
class ServerManager {
/// The URL of the Shlink server
String? serverUrl;
/// The API key to access the server
String? apiKey;
/// Current Shlink API Version used by the app
static String apiVersion = "3";
String getServerUrl() {
return serverUrl ?? "";
}
String getApiVersion() {
return apiVersion;
}
/// Checks whether the user provided information about the server
/// (url and apikey)
Future<bool> checkLogin() async {
await _loadCredentials();
return (serverUrl != null);
}
/// Logs out the user and removes data about the Shlink server
Future<void> logOut() async {
const storage = FlutterSecureStorage();
await storage.delete(key: "shlink_url");
await storage.delete(key: "shlink_apikey");
}
/// Loads the server credentials from [FlutterSecureStorage]
Future<void> _loadCredentials() async {
const storage = FlutterSecureStorage();
final prefs = await SharedPreferences.getInstance();
if (prefs.getBool('first_run') ?? true) {
FlutterSecureStorage storage = const FlutterSecureStorage();
await storage.deleteAll();
prefs.setBool('first_run', false);
}
serverUrl = await storage.read(key: "shlink_url");
apiKey = await storage.read(key: "shlink_apikey");
}
/// Saves the provided server credentials to [FlutterSecureStorage]
void _saveCredentials(String url, String apiKey) async {
const storage = FlutterSecureStorage();
storage.write(key: "shlink_url", value: url);
storage.write(key: "shlink_apikey", value: apiKey);
}
/// Saves provided server credentials and tries to establish a connection
FutureOr<Either<String, Failure>> initAndConnect(
String url, String apiKey) async {
// TODO: convert url to correct format
serverUrl = url;
this.apiKey = apiKey;
_saveCredentials(url, apiKey);
final result = await connect();
result.fold((l) => null, (r) {
logOut();
});
return result;
}
/// Establishes a connection to the server
FutureOr<Either<String, Failure>> connect() async {
_loadCredentials();
return apiConnect(apiKey, serverUrl, apiVersion);
}
/// Gets all short URLs from the server
FutureOr<Either<List<ShortURL>, Failure>> getShortUrls() async {
return apiGetShortUrls(apiKey, serverUrl, apiVersion);
}
/// Gets statistics about the Shlink instance
FutureOr<Either<ShlinkStats, Failure>> getShlinkStats() async {
return apiGetShlinkStats(apiKey, serverUrl, apiVersion);
}
/// Saves a new short URL to the server
FutureOr<Either<ShortURL, Failure>> submitShortUrl(
ShortURLSubmission shortUrl) async {
return apiSubmitShortUrl(shortUrl, apiKey, serverUrl, apiVersion);
}
FutureOr<Either<ShortURL, Failure>> updateShortUrl(
ShortURLSubmission shortUrl) async {
return apiUpdateShortUrl(shortUrl, apiKey, serverUrl, apiVersion);
}
/// Deletes a short URL from the server, identified by its slug
FutureOr<Either<String, Failure>> deleteShortUrl(String shortCode) async {
return apiDeleteShortUrl(shortCode, apiKey, serverUrl, apiVersion);
}
/// Gets health data about the server
FutureOr<Either<ServerHealthResponse, Failure>> getServerHealth() async {
return apiGetServerHealth(apiKey, serverUrl, apiVersion);
}
/// Gets recently created/used short URLs from the server
FutureOr<Either<List<ShortURL>, Failure>> getRecentShortUrls() async {
return apiGetRecentShortUrls(apiKey, serverUrl, apiVersion);
}
}
/// Server response data type about a page of short URLs from the server
class ShortURLPageResponse {
List<ShortURL> urls;
int totalPages;
ShortURLPageResponse(this.urls, this.totalPages);
}
/// Server response data type about the health status of the server
class ServerHealthResponse {
String status;
String version;
ServerHealthResponse({required this.status, required this.version});
}
/// Failure class, used for the API
abstract class Failure {}
/// Used when a request to a server fails
/// (due to networking issues or an unexpected response)
class RequestFailure extends Failure {
int statusCode;
String description;
RequestFailure(this.statusCode, this.description);
}
/// Contains information about an error returned by the Shlink API
class ApiFailure extends Failure {
String type;
String detail;
String title;
int status;
List<dynamic>? invalidElements;
ApiFailure(
{required this.type,
required this.detail,
required this.title,
required this.status,
this.invalidElements});
}