feat: Implement quest event handling and integrate it into leveling, economy, and inventory services.

shared/modules/quest/quest.service.test.ts

@@ -148,4 +148,60 @@ describe("questService", () => {
             expect(result).toEqual(mockData as any);
         });
     });
+
+    describe("handleEvent", () => {
+        it("should progress a quest", async () => {
+            const mockUserQuest = {
+                userId: 1n,
+                questId: 101,
+                progress: 0,
+                completedAt: null,
+                quest: { triggerEvent: "TEST_EVENT", requirements: { target: 5 } }
+            };
+            mockFindMany.mockResolvedValue([mockUserQuest]);
+            mockReturning.mockResolvedValue([{ userId: 1n, questId: 101, progress: 1 }]);
+
+            await questService.handleEvent("1", "TEST_EVENT", 1);
+
+            expect(mockUpdate).toHaveBeenCalled();
+            expect(mockSet).toHaveBeenCalledWith({ progress: 1 });
+        });
+
+        it("should complete a quest when target reached", async () => {
+            const mockUserQuest = {
+                userId: 1n,
+                questId: 101,
+                progress: 4,
+                completedAt: null,
+                quest: { 
+                    triggerEvent: "TEST_EVENT", 
+                    requirements: { target: 5 },
+                    rewards: { balance: 100 }
+                }
+            };
+            mockFindMany.mockResolvedValue([mockUserQuest]);
+            mockFindFirst.mockResolvedValue(mockUserQuest); // For completeQuest
+
+            await questService.handleEvent("1", "TEST_EVENT", 1);
+
+            // Verify completeQuest was called (it will update completedAt)
+            expect(mockUpdate).toHaveBeenCalled();
+            expect(mockSet).toHaveBeenCalledWith({ completedAt: expect.any(Date) });
+        });
+
+        it("should ignore irrelevant events", async () => {
+            const mockUserQuest = {
+                userId: 1n,
+                questId: 101,
+                progress: 0,
+                completedAt: null,
+                quest: { triggerEvent: "DIFFERENT_EVENT", requirements: { target: 5 } }
+            };
+            mockFindMany.mockResolvedValue([mockUserQuest]);
+
+            await questService.handleEvent("1", "TEST_EVENT", 1);
+
+            expect(mockUpdate).not.toHaveBeenCalled();
+        });
+    });
 });

shared/modules/quest/quest.service.ts

@@ -34,6 +34,37 @@ export const questService = {
         }, tx);
     },
 
+    handleEvent: async (userId: string, eventName: string, weight: number = 1, tx?: Transaction) => {
+        return await withTransaction(async (txFn) => {
+            // 1. Fetch active user quests for this event
+            const activeUserQuests = await txFn.query.userQuests.findMany({
+                where: and(
+                    eq(userQuests.userId, BigInt(userId)),
+                ),
+                with: {
+                    quest: true
+                }
+            });
+
+            const relevant = activeUserQuests.filter(uq =>
+                uq.quest.triggerEvent === eventName && !uq.completedAt
+            );
+
+            for (const uq of relevant) {
+                const requirements = uq.quest.requirements as { target?: number };
+                const target = requirements?.target || 1;
+
+                const newProgress = (uq.progress || 0) + weight;
+
+                if (newProgress >= target) {
+                    await questService.completeQuest(userId, uq.questId, txFn);
+                } else {
+                    await questService.updateProgress(userId, uq.questId, newProgress, txFn);
+                }
+            }
+        }, tx);
+    },
+
     completeQuest: async (userId: string, questId: number, tx?: Transaction) => {
         return await withTransaction(async (txFn) => {
             const userQuest = await txFn.query.userQuests.findFirst({