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