hamid zarghami
37 lines
837 B
TypeScript
37 lines
837 B
TypeScript
// Simple ULID generator
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// ULID format: 01234567890123456789012345 (26 characters)
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// Time (10 chars) + Random (16 chars)
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const ENCODING = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
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const TIME_LEN = 10;
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const RANDOM_LEN = 16;
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const getRandomChar = (): string => {
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return ENCODING[Math.floor(Math.random() * ENCODING.length)];
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};
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const encodeTime = (now: number): string => {
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let time = "";
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let num = now;
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for (let i = 0; i < TIME_LEN; i++) {
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time = ENCODING[num % ENCODING.length] + time;
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num = Math.floor(num / ENCODING.length);
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}
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return time;
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};
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const encodeRandom = (): string => {
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let random = "";
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for (let i = 0; i < RANDOM_LEN; i++) {
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random += getRandomChar();
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}
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return random;
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};
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export const generateULID = (): string => {
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const now = Date.now();
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return encodeTime(now) + encodeRandom();
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};
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