From 84419bec2ad042d4ead3acf00bfaf909955ef084 Mon Sep 17 00:00:00 2001
From: JustArchi <JustArchi@JustArchi.net>
Date: Fri, 8 Jul 2016 09:48:15 +0200
Subject: [PATCH] Use events for handling Save()

---
 ArchiSteamFarm/GlobalDatabase.cs                | 17 +++++++++++++----
 ArchiSteamFarm/JsonStorageServerListProvider.cs | 16 ++--------------
 2 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/ArchiSteamFarm/GlobalDatabase.cs b/ArchiSteamFarm/GlobalDatabase.cs
index 29d1c4309..46488bb04 100644
--- a/ArchiSteamFarm/GlobalDatabase.cs
+++ b/ArchiSteamFarm/GlobalDatabase.cs
@@ -57,7 +57,7 @@ namespace ArchiSteamFarm {
 
 		[JsonProperty(Required = Required.DisallowNull)]
 		[SuppressMessage("ReSharper", "AutoPropertyCanBeMadeGetOnly.Local")]
-		internal JsonStorageServerListProvider ServerListProvider { get; private set; }
+		internal JsonStorageServerListProvider ServerListProvider { get; private set; } = new JsonStorageServerListProvider();
 
 		private readonly object FileLock = new object();
 
@@ -88,11 +88,20 @@ namespace ArchiSteamFarm {
 			}
 
 			globalDatabase.FilePath = filePath;
-			globalDatabase.ServerListProvider.GlobalDatabase = globalDatabase;
+			globalDatabase.ServerListProvider.ServerListUpdated += globalDatabase.OnServerListUpdated;
 
 			return globalDatabase;
 		}
 
+		private void OnServerListUpdated(object sender, EventArgs e) {
+			if ((sender == null) || (e == null)) {
+				Logging.LogNullError(nameof(sender) + " || " + nameof(e));
+				return;
+			}
+
+			Save();
+		}
+
 		// This constructor is used when creating new database
 		private GlobalDatabase(string filePath) : this() {
 			if (string.IsNullOrEmpty(filePath)) {
@@ -106,10 +115,10 @@ namespace ArchiSteamFarm {
 		// This constructor is used only by deserializer
 		[SuppressMessage("ReSharper", "UnusedMember.Local")]
 		private GlobalDatabase() {
-			ServerListProvider = new JsonStorageServerListProvider(this);
+			ServerListProvider.ServerListUpdated += OnServerListUpdated;
 		}
 
-		internal void Save() {
+		private void Save() {
 			string json = JsonConvert.SerializeObject(this, CustomSerializerSettings);
 			if (string.IsNullOrEmpty(json)) {
 				Logging.LogNullError(nameof(json));
diff --git a/ArchiSteamFarm/JsonStorageServerListProvider.cs b/ArchiSteamFarm/JsonStorageServerListProvider.cs
index 6914964fc..4f0923ee8 100644
--- a/ArchiSteamFarm/JsonStorageServerListProvider.cs
+++ b/ArchiSteamFarm/JsonStorageServerListProvider.cs
@@ -37,19 +37,7 @@ namespace ArchiSteamFarm {
 		[SuppressMessage("ReSharper", "FieldCanBeMadeReadOnly.Local")]
 		private HashSet<IPEndPoint> Servers = new HashSet<IPEndPoint>();
 
-		internal GlobalDatabase GlobalDatabase { private get; set; }
-
-		internal JsonStorageServerListProvider(GlobalDatabase globalDatabase) {
-			if (globalDatabase == null) {
-				throw new ArgumentNullException(nameof(globalDatabase));
-			}
-
-			GlobalDatabase = globalDatabase;
-		}
-
-		// This constructor is used only by deserializer
-		[SuppressMessage("ReSharper", "UnusedMember.Local")]
-		private JsonStorageServerListProvider() { }
+		internal event EventHandler ServerListUpdated = delegate { };
 
 		public Task<IEnumerable<IPEndPoint>> FetchServerListAsync() => Task.FromResult(Servers.Select(endpoint => endpoint));
 
@@ -64,7 +52,7 @@ namespace ArchiSteamFarm {
 				Servers.Add(endpoint);
 			}
 
-			GlobalDatabase.Save();
+			ServerListUpdated(this, EventArgs.Empty);
 
 			return Task.Delay(0);
 		}