add mcId

ui/lib/mcid.ts

@@ -0,0 +1,38 @@
+// utils/mcid.ts
+export class Mcid {
+  private lastTimestamp = -1;
+  private sequence = 0;
+
+  constructor(private readonly machineId: number = 0) {
+    if (machineId < 0 || machineId > 255) {
+      throw new Error('Machine ID must be between 0 and 255');
+    }
+  }
+
+  generate(): number {
+    let now = Date.now();
+
+    if (now < this.lastTimestamp) {
+      throw new Error('Clock moved backwards');
+    }
+
+    if (now === this.lastTimestamp) {
+      this.sequence = (this.sequence + 1) & 0xf;
+      if (this.sequence === 0) {
+        while (now <= this.lastTimestamp) {
+          now = Date.now();
+        }
+      }
+    } else {
+      this.sequence = 0;
+    }
+
+    this.lastTimestamp = now;
+
+    return (
+      (now * 0x1000) +      // 时间戳左移 12 位
+      (this.machineId * 16) + // 机器 ID 左移 4 位
+      this.sequence          // 序列号
+    );
+  }
+}