Database saving hardening, #265

ArchiSteamFarm/GlobalDatabase.cs

@@ -26,6 +26,7 @@ using Newtonsoft.Json;
 using System;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
+using System.Threading.Tasks;
 
 namespace ArchiSteamFarm {
 	internal sealed class GlobalDatabase {
@@ -39,7 +40,7 @@ namespace ArchiSteamFarm {
 				}
 
 				_CellID = value;
-				Save();
+				Save().Wait();
 			}
 		}
 
@@ -83,21 +84,32 @@ namespace ArchiSteamFarm {
 			}
 
 			FilePath = filePath;
-			Save();
+			Save().Wait();
 		}
 
 		// This constructor is used only by deserializer
 		[SuppressMessage("ReSharper", "UnusedMember.Local")]
 		private GlobalDatabase() { }
 
-		private void Save() {
-			lock (FilePath) {
-				try {
-					File.WriteAllText(FilePath, JsonConvert.SerializeObject(this));
-				} catch (Exception e) {
-					Logging.LogGenericException(e);
-				}
-			}
-		}
-	}
+        private async Task Save() {
+            string json = JsonConvert.SerializeObject(this);
+            if (string.IsNullOrEmpty(json)) {
+                Logging.LogNullError(nameof(json));
+                return;
+            }
+
+            for (byte i = 0; i < 5; i++) {
+                lock (FilePath) {
+                    try {
+                        File.WriteAllText(FilePath, json);
+                        break;
+                    } catch (Exception e) {
+                        Logging.LogGenericException(e);
+                    }
+                }
+
+                await Task.Delay(1000).ConfigureAwait(false);
+            }
+        }
+    }
 }