deck: Assigned unique id to each card.

backend/src/types.d.ts

@@ -11,7 +11,7 @@ type UNOCard = {
     type: CardType;
     color: CardColor;
     value: CardValue;
-    id: undefined;
+    id: string;
 };
 
 type Player = {

backend/uno-game-engine/deck.ts

@@ -1,5 +1,5 @@
 const colors: Array<CardColor> = ['red', 'yellow', 'green', 'blue'];
 const values = [
     '0',
     '1',
     '2',
@@ -14,8 +14,9 @@
     'reverse',
     'draw2',
 ];
 const specialCards = ['wild', 'draw4'];
 const deck = [];
+const sameCardCount = []; // to keep track of same cards in assigning unique id to each card
 
 /**    
  * In a standard UNO deck, there are 108 cards. Here's the breakdown:
@@ -60,15 +61,20 @@
     color: CardColor,
     value: CardValue
 ): UNOCard {
-    //todo: Implement unique identification of cards by assigning an id to each card
-    return { type, color, value, id: undefined };
+    const id = `card-${type}-${color}-${value}`;
+
+    if (!sameCardCount[id]) sameCardCount[id] = 0;
+    sameCardCount[id]++; // increment the count of same cards to assign unique id
+
+    const uid = `${id}-${sameCardCount[id]}`;
+    return { type, color, value, id: uid };
 }
 
 /**
  * This function shuffles the elements of the given array *in place* . The function behaves in a type-agnostic way.
  * Time complexity: O(n)
  */
 export function shuffle(deck: Array<any>) {
     //todo: Implement a generic shuffling algorithm
     [deck[0], deck[1]] = [deck[1], deck[0]];
 }