improve syncing and storing

back/system/Logger.js

@@ -0,0 +1,45 @@
+class Logger {
+    constructor() {
+
+    }
+
+    log(content) {
+        console.log(this._prefix("log"), content);
+    }
+
+    warn(content) {
+        console.warn(this._prefix("warn"), content);
+    }
+
+    error(content) {
+        console.error(this._prefix("err"), content);
+    }
+
+    _prefix(type) {
+        let typeStr = "";
+        switch (type) {
+            case "log":
+                typeStr = "LOG"
+                break;
+            case "warn":
+                typeStr = "WARN"
+                break;
+            case "err":
+                typeStr = "ERR"
+                break;
+            default:
+                break;
+        }
+        return `[${typeStr}: ${this._timestamp()}]`;
+    }
+
+    _timestamp() {
+        return new Date().toLocaleString();
+    }
+}
+
+const logger = new Logger();
+
+module.exports = {
+    logger,
+}