feat: friend system + shared stores

src/stores.ts

@@ -1,6 +1,7 @@
 import z from "zod";
 import { Store, type StoreType } from "./entities/Stores";
 import type { User } from "./entities/User";
+import { getFriends } from "./entities/Follow";
 
 export const locationStore = z
 	.object({
@@ -53,6 +54,8 @@ export const storeTypes: Record<StoreType, z.ZodSchema> = {
 	route: routeStore,
 };
 
+const sharedStoreTypes: StoreType[] = ["vehicle"];
+
 export const SyncPayload = z.object({
 	changes: z.array(
 		z.object({
@@ -127,14 +130,44 @@ export async function sync(payload: SyncPayload, user: User) {
 		await store.save();
 	}
 
+	const friends = await getFriends(user);
+
+	const selector = [{ id: user.id }];
+	for (const friend of friends) {
+		selector.push({ id: friend.id });
+	}
+
 	// Find stores that are out of date on the client
-	const allStores = await Store.findBy({ user: { id: user.id } }); // TODO: include friends' public stores, TODO: use SQL query to only get modified stores
+	const allStores = await Store.find({ where: { user: selector }, relations: { user: true } }); // TODO: use SQL query to only get modified stores
 	for (const store of allStores) {
+		if (store.user.id !== user.id && !sharedStoreTypes.includes(store.type)) {
+			// Not the owner of this store and not a shared type
+			continue;
+		}
+
 		const clientStore = payload.stores.find((s) => s.id === store.id);
 		if (!clientStore || new Date(clientStore.modified_at) < store.modified_at) {
 			changes.push(store); // Client doesn't have this store or it's out of date
 		}
 	}
 
+	// Send "null" change for stores that aren't owned by the user or their friends
+	for (const clientStore of payload.stores) {
+		if (
+			!allStores.find((s) => s.id === clientStore.id) &&
+			(!user.id ||
+				!friends.find((f) => f.id === clientStore.id)) // Not owned by user or their friends
+		) {
+			const deletedStore = new Store();
+			deletedStore.id = clientStore.id;
+			deletedStore.data = "null";
+			deletedStore.modified_at = new Date();
+			deletedStore.created_at = new Date();
+			deletedStore.type = "location"; // Type doesn't matter, data is null
+			deletedStore.name = "";
+			changes.push(deletedStore);
+		}
+	}
+
 	return { changes };
 }