Create loyaltyProgram.js

src/loyalty/loyaltyProgram.js

@@ -0,0 +1,50 @@
+// loyalty/loyaltyProgram.js
+
+class LoyaltyProgram {
+    constructor(name, description, pointsPerPurchase) {
+        this.name = name;
+        this.description = description;
+        this.pointsPerPurchase = pointsPerPurchase;
+        this.members = new Map(); // Store userId and their points
+    }
+
+    addMember(userId) {
+        if (!this.members.has(userId)) {
+            this.members.set(userId, 0); // Initialize points to 0
+        }
+    }
+
+    removeMember(userId) {
+        this.members.delete(userId);
+    }
+
+    earnPoints(userId, purchaseAmount) {
+        if (!this.members.has(userId)) {
+            throw new Error('User  is not a member of this loyalty program.');
+        }
+        const pointsEarned = Math.floor(purchaseAmount * this.pointsPerPurchase);
+        this.members.set(userId, this.members.get(userId) + pointsEarned);
+        return pointsEarned;
+    }
+
+    getPoints(userId) {
+        if (!this.members.has(userId)) {
+            throw new Error('User  is not a member of this loyalty program.');
+        }
+        return this.members.get(userId);
+    }
+
+    redeemPoints(userId, points) {
+        if (!this.members.has(userId)) {
+            throw new Error('User  is not a member of this loyalty program.');
+        }
+        const currentPoints = this.members.get(userId);
+        if (currentPoints < points) {
+            throw new Error('Insufficient points to redeem.');
+        }
+        this.members.set(userId, currentPoints - points);
+        return true; // Redemption successful
+    }
+}
+
+module.exports = LoyaltyProgram;