✨ Snowflake validation

src/snowflake.ts

@@ -0,0 +1,47 @@
+interface DeconstructedSnowflake {
+	timestamp: number;
+	date: Date;
+	workerID: number;
+	processID: number;
+	increment: number;
+	binary: string;
+}
+
+const EPOCH = 1420070400000; // Discord's EPOCH
+
+export function isSnowflake(snowflake: string): boolean {
+	const { timestamp } = deconstruct(snowflake);
+	if (timestamp > EPOCH && timestamp <= 3619093655551) {
+		return true;
+	}
+	return false;
+}
+
+function deconstruct(snowflake: string): DeconstructedSnowflake {
+	const BINARY = idToBinary(snowflake).padStart(64, "0");
+	return {
+		timestamp: parseInt(BINARY.substring(0, 42), 2) + EPOCH,
+		get date() {
+			return new Date(this.timestamp);
+		},
+		workerID: parseInt(BINARY.substring(42, 47), 2),
+		processID: parseInt(BINARY.substring(47, 52), 2),
+		increment: parseInt(BINARY.substring(52, 64), 2),
+		binary: BINARY,
+	};
+}
+
+function idToBinary(snowflake: string): string {
+	let bin = "";
+	let high = parseInt(snowflake.slice(0, -10)) || 0;
+	let low = parseInt(snowflake.slice(-10));
+	while (low > 0 || high > 0) {
+		bin = String(low & 1) + bin;
+		low = Math.floor(low / 2);
+		if (high > 0) {
+			low += 5000000000 * (high % 2);
+			high = Math.floor(high / 2);
+		}
+	}
+	return bin;
+}