diff options
Diffstat (limited to 'src/app/uuid.ts')
| -rw-r--r-- | src/app/uuid.ts | 92 |
1 files changed, 46 insertions, 46 deletions
diff --git a/src/app/uuid.ts b/src/app/uuid.ts index ae39d4d..bdceefe 100644 --- a/src/app/uuid.ts +++ b/src/app/uuid.ts @@ -1,65 +1,65 @@ const HEX = "0123456789abcdef"; function hexChar(n: number): string { - return HEX.charAt(n & 0xf); + return HEX.charAt(n & 0xf); } function hexFromBytes(bytes: Uint8Array): string { - let out = ""; - for (let i = 0; i < bytes.length; i++) { - const b = bytes[i] as number; - out += hexChar(b >> 4); - out += hexChar(b); - } - return out; + let out = ""; + for (let i = 0; i < bytes.length; i++) { + const b = bytes[i] as number; + out += hexChar(b >> 4); + out += hexChar(b); + } + return out; } function formatV4(rand: Uint8Array): string { - const h = hexFromBytes(rand); - return ( - h.slice(0, 8) + - "-" + - h.slice(8, 12) + - "-4" + - h.slice(13, 16) + - "-" + - ((parseInt(h.slice(16, 18), 16) & 0x3f) | 0x80).toString(16).padStart(2, "0") + - h.slice(18, 20) + - "-" + - h.slice(20, 32) - ); + const h = hexFromBytes(rand); + return ( + h.slice(0, 8) + + "-" + + h.slice(8, 12) + + "-4" + + h.slice(13, 16) + + "-" + + ((parseInt(h.slice(16, 18), 16) & 0x3f) | 0x80).toString(16).padStart(2, "0") + + h.slice(18, 20) + + "-" + + h.slice(20, 32) + ); } function uuidFromGetRandomValues(): string { - const buf = new Uint8Array(16); - crypto.getRandomValues(buf); - buf[6] = ((buf[6] as number) & 0x0f) | 0x40; - buf[8] = ((buf[8] as number) & 0x3f) | 0x80; - return formatV4(buf); + const buf = new Uint8Array(16); + crypto.getRandomValues(buf); + buf[6] = ((buf[6] as number) & 0x0f) | 0x40; + buf[8] = ((buf[8] as number) & 0x3f) | 0x80; + return formatV4(buf); } function uuidFromMathRandom(): string { - let s = ""; - for (let i = 0; i < 36; i++) { - if (i === 8 || i === 13 || i === 18 || i === 23) { - s += "-"; - } else if (i === 14) { - s += "4"; - } else if (i === 19) { - s += hexChar(Math.floor(Math.random() * 4) + 8); - } else { - s += hexChar(Math.floor(Math.random() * 16)); - } - } - return s; + let s = ""; + for (let i = 0; i < 36; i++) { + if (i === 8 || i === 13 || i === 18 || i === 23) { + s += "-"; + } else if (i === 14) { + s += "4"; + } else if (i === 19) { + s += hexChar(Math.floor(Math.random() * 4) + 8); + } else { + s += hexChar(Math.floor(Math.random() * 16)); + } + } + return s; } export function randomId(): string { - if (typeof crypto !== "undefined" && typeof crypto.randomUUID === "function") { - return crypto.randomUUID(); - } - if (typeof crypto !== "undefined" && typeof crypto.getRandomValues === "function") { - return uuidFromGetRandomValues(); - } - return uuidFromMathRandom(); + if (typeof crypto !== "undefined" && typeof crypto.randomUUID === "function") { + return crypto.randomUUID(); + } + if (typeof crypto !== "undefined" && typeof crypto.getRandomValues === "function") { + return uuidFromGetRandomValues(); + } + return uuidFromMathRandom(); } |
