migrate to typescript

src/utils/logger.ts

@@ -0,0 +1,89 @@
+import {config} from '../config';
+
+const enum LogLevel {
+    ERROR = "ERROR",
+    WARN = "WARN",
+    INFO = "INFO",
+    DEBUG = "DEBUG"
+}
+
+const colors = {
+    Reset: "\x1b[0m",
+    Bright: "\x1b[1m",
+    Dim: "\x1b[2m",
+    Underscore: "\x1b[4m",
+    Blink: "\x1b[5m",
+    Reverse: "\x1b[7m",
+    Hidden: "\x1b[8m",
+
+    FgBlack: "\x1b[30m",
+    FgRed: "\x1b[31m",
+    FgGreen: "\x1b[32m",
+    FgYellow: "\x1b[33m",
+    FgBlue: "\x1b[34m",
+    FgMagenta: "\x1b[35m",
+    FgCyan: "\x1b[36m",
+    FgWhite: "\x1b[37m",
+
+    BgBlack: "\x1b[40m",
+    BgRed: "\x1b[41m",
+    BgGreen: "\x1b[42m",
+    BgYellow: "\x1b[43m",
+    BgBlue: "\x1b[44m",
+    BgMagenta: "\x1b[45m",
+    BgCyan: "\x1b[46m",
+    BgWhite: "\x1b[47m",
+};
+
+
+class Logger {
+    private _settings = {
+        ERROR: true,
+        WARN: true,
+        INFO: false,
+        DEBUG: false,
+    };
+
+    constructor() {
+        if (config.mode === 'development') {
+            this._settings.INFO = true;
+            this._settings.DEBUG = true;
+        } else if (config.mode === 'test') {
+            this._settings.WARN = false;
+        }
+    }
+
+    error(str: string) {
+        this.log(LogLevel.ERROR, str);
+    }
+    warn(str: string) {
+        this.log(LogLevel.WARN, str);
+    }
+    info(str: string) {
+        this.log(LogLevel.INFO, str);
+    }
+    debug(str: string) {
+        this.log(LogLevel.DEBUG, str);
+    }
+
+    private log(level: LogLevel, str: string) {
+        if (!this._settings[level]) {
+            return;
+        }
+
+        let color = colors.Bright;
+        if (level === LogLevel.ERROR) color = colors.FgRed;
+        if (level === LogLevel.WARN) color = colors.FgYellow;
+
+        let levelStr = level.toString();
+        if (levelStr.length === 4) {
+            levelStr += " ";  // ensure logs are aligned
+        }
+        console.log(colors.Dim, `${levelStr} ${new Date().toISOString()}: `, color, str, colors.Reset);
+    }
+}
+
+const loggerInstance = new Logger();
+export {
+    loggerInstance as Logger
+}