Initial commit

encode.js

@@ -0,0 +1,47 @@
+class Snowflake {
+    constructor(machineId) {
+        if (machineId < 0 || machineId >= 1024) {
+            throw new Error('Machine ID must be in the range 0-1023.');
+        }
+
+        this.machineId = BigInt(machineId);
+        this.sequence = BigInt(0);
+        this.lastTimestamp = BigInt(-1);
+
+        // Konfiguracja bitów: 41 bitów na czas, 10 bitów na ID maszyny, 12 bitów na sekwencję
+        this.timestampShift = 22n;
+        this.machineIdShift = 12n;
+        this.sequenceMask = 0xFFFn; // 4095 w dziesiętnym, BigInt
+    }
+
+    generate() {
+        let timestamp = BigInt(Date.now());
+
+        if (timestamp === this.lastTimestamp) {
+            this.sequence = (this.sequence + 1n) & this.sequenceMask;
+
+            if (this.sequence === 0n) {
+                while (timestamp <= this.lastTimestamp) {
+                    timestamp = BigInt(Date.now());
+                }
+            }
+        } else {
+            this.sequence = 0n;
+        }
+
+        this.lastTimestamp = timestamp;
+
+        const id = ((timestamp & 0x1FFFFFFFFFFn) << this.timestampShift) |
+                    (this.machineId << this.machineIdShift) |
+                    this.sequence;
+
+        return id.toString(); // Zwraca string, ponieważ BigInt może być zbyt duży dla niektórych zastosowań
+    }
+}
+
+// Użycie
+const machineId = 1; // ID maszyny (0-1023)
+const snowflake = new Snowflake(machineId);
+
+const id1 = snowflake.generate();
+console.log(id1);