feat: add Logger core module

src/core/Logger.ts

@@ -0,0 +1,41 @@
+type LogLevel = "debug" | "info" | "warn" | "error" | "none";
+
+class Logger {
+  private level: LogLevel = "debug";
+
+  setLevel(level: LogLevel): void {
+    this.level = level;
+  }
+
+  debug(...args: any[]): void {
+    if (this.shouldLog("debug")) {
+      console.debug(...args);
+    }
+  }
+
+  info(...args: any[]): void {
+    if (this.shouldLog("info")) {
+      console.info(...args);
+    }
+  }
+
+  warn(...args: any[]): void {
+    if (this.shouldLog("warn")) {
+      console.warn(...args);
+    }
+  }
+
+  error(...args: any[]): void {
+    if (this.shouldLog("error")) {
+      console.error(...args);
+    }
+  }
+
+  private shouldLog(level: LogLevel): boolean {
+    const levels: LogLevel[] = ["debug", "info", "warn", "error", "none"];
+    return levels.indexOf(level) >= levels.indexOf(this.level);
+  }
+}
+
+export const logger = new Logger();
+export default logger;