feat(stores): Verify store data

src/stores.ts

@@ -61,12 +61,28 @@ export const SyncPayload = z.object({
 
 export type SyncPayload = z.infer<typeof SyncPayload>;
 
-// TODO: verify data
+export function verifyStoreData(type: StoreType, data: string) {
+	const schema = storeTypes[type];
+	if(!schema) return false;
+	try {
+		const parsedData = JSON.parse(data);
+		schema.parse(parsedData);
+		return true;
+	} catch {
+		return false;
+	}
+}
+
 export async function sync(payload: SyncPayload, user: User) {
 	const changes: Store[] = [];
 	// Apply changes from client
 	for(const change of payload.changes) {
 		const store = await Store.findOne({ where: { id: change.id }, relations: { user: true } });
+		if(!verifyStoreData(change.type, change.data)) {
+			// Invalid data
+			if(store) changes.push(store); // Send back the store to the client to overwrite their changes
+			continue;
+		}
 		if(!store) {
 			// Store doesn't exist, create it
 			const newStore = new Store();