added shop functionality. Shop now pulls from db

components/shop/shop-content.tsx

@@ -12,55 +12,78 @@ import {
   CardTitle,
 } from "@/components/ui/card";
 import { HABIT_PET_DATA_UPDATED_EVENT } from "@/lib/app-events";
-import { getCoins } from "@/lib/avatar-progression-storage";
+import {
+  getShopState,
+  purchaseShopItem,
+  type ShopItem,
+} from "@/lib/shop-storage";
 
-const shopItems = [
-  {
-    id: "hat",
-    name: "Pixel cap",
-    price: 50,
-    description: "A cozy cap for your habit pet.",
-  },
-  {
-    id: "bed",
-    name: "Cloud bed",
-    price: 120,
-    description: "Boost recovery after tough days.",
-  },
-  {
-    id: "snack",
-    name: "Berry snack",
-    price: 25,
-    description: "A small treat for good streaks.",
-  },
-];
+function formatItemType(type: string) {
+  return type.charAt(0).toUpperCase() + type.slice(1);
+}
 
 export function ShopContent() {
   const [coins, setCoins] = useState<number | null>(null);
+  const [items, setItems] = useState<ShopItem[]>([]);
+  const [ownedItemIds, setOwnedItemIds] = useState<string[]>([]);
   const [error, setError] = useState<string | null>(null);
+  const [purchaseError, setPurchaseError] = useState<string | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+  const [pendingItemId, setPendingItemId] = useState<string | null>(null);
 
-  const refreshCoins = useCallback(async () => {
+  const refreshShop = useCallback(async () => {
     try {
       setError(null);
-      setCoins(await getCoins());
+      const state = await getShopState();
+      setCoins(state.coins);
+      setItems(state.items);
+      setOwnedItemIds(state.ownedItemIds);
     } catch (refreshError) {
       setError(
         refreshError instanceof Error
           ? refreshError.message
-          : "Could not load your balance.",
+          : "Could not load the shop.",
       );
       setCoins(0);
+      setItems([]);
+      setOwnedItemIds([]);
+    } finally {
+      setIsLoading(false);
     }
   }, []);
 
   useEffect(() => {
-    void refreshCoins();
+    void refreshShop();
 
-    window.addEventListener(HABIT_PET_DATA_UPDATED_EVENT, refreshCoins);
+    window.addEventListener(HABIT_PET_DATA_UPDATED_EVENT, refreshShop);
     return () => {
-      window.removeEventListener(HABIT_PET_DATA_UPDATED_EVENT, refreshCoins);
+      window.removeEventListener(HABIT_PET_DATA_UPDATED_EVENT, refreshShop);
+    };
+  }, [refreshShop]);
+
+  const handlePurchase = async (item: ShopItem) => {
+    if (pendingItemId) {
+      return;
+    }
+
+    try {
+      setPurchaseError(null);
+      setPendingItemId(item.id);
+      const remainingCoins = await purchaseShopItem(item.id);
+      setCoins(remainingCoins);
+      setOwnedItemIds((current) =>
+        current.includes(item.id) ? current : [...current, item.id],
+      );
+    } catch (purchaseFailure) {
+      setPurchaseError(
+        purchaseFailure instanceof Error
+          ? purchaseFailure.message
+          : "Could not complete purchase.",
+      );
+    } finally {
+      setPendingItemId(null);
+    }
   };
-  }, [refreshCoins]);
 
   return (
     <>
@@ -72,10 +95,23 @@ export function ShopContent() {
       </div>
 
       {error ? <p className="mb-4 text-sm text-red-500">{error}</p> : null}
+      {purchaseError ? (
+        <p className="mb-4 text-sm text-red-500">{purchaseError}</p>
+      ) : null}
 
+      {isLoading ? (
+        <p className="text-sm text-muted-foreground">Loading shop items...</p>
+      ) : items.length === 0 ? (
+        <p className="text-sm text-muted-foreground">
+          No items in the shop yet. Add rows to the shop_items table in
+          Supabase.
+        </p>
+      ) : (
         <div className="grid gap-4">
-        {shopItems.map((item) => {
+          {items.map((item) => {
+            const isOwned = ownedItemIds.includes(item.id);
             const canAfford = coins !== null && coins >= item.price;
+            const isPending = pendingItemId === item.id;
 
             return (
               <Card key={item.id}>
@@ -83,7 +119,9 @@ export function ShopContent() {
                   <div className="flex items-start justify-between gap-3">
                     <div>
                       <CardTitle className="text-base">{item.name}</CardTitle>
-                    <CardDescription>{item.description}</CardDescription>
+                      <CardDescription>
+                        {formatItemType(item.type)}
+                      </CardDescription>
                     </div>
                     <Badge>{item.price} pts</Badge>
                   </div>
@@ -91,16 +129,29 @@ export function ShopContent() {
                 <CardContent>
                   <Button
                     className="w-full"
-                  variant="outline"
-                  disabled={coins === null || !canAfford}
+                    variant={isOwned ? "secondary" : "outline"}
+                    disabled={
+                      isOwned ||
+                      coins === null ||
+                      isPending ||
+                      (!isOwned && !canAfford)
+                    }
+                    onClick={() => void handlePurchase(item)}
                   >
-                  {canAfford ? "Buy" : "Not enough points"}
+                    {isOwned
+                      ? "Owned"
+                      : isPending
+                        ? "Purchasing..."
+                        : canAfford
+                          ? "Buy"
+                          : "Not enough points"}
                   </Button>
                 </CardContent>
               </Card>
             );
           })}
         </div>
+      )}
     </>
   );
 }

lib/avatar-progression-storage.ts

@@ -72,3 +72,17 @@ export async function adjustCoins(delta: number): Promise<number> {
 
   return nextCoins;
 }
+
+export async function spendCoins(amount: number): Promise<number> {
+  if (amount <= 0) {
+    throw new Error("Purchase amount must be greater than zero.");
+  }
+
+  const currentCoins = await getCoins();
+
+  if (currentCoins < amount) {
+    throw new Error("Not enough points.");
+  }
+
+  return adjustCoins(-amount);
+}

lib/shop-storage.ts

@@ -0,0 +1,159 @@
+import { notifyHabitPetDataUpdated } from "@/lib/app-events";
+import { getCoins, spendCoins, adjustCoins } from "@/lib/avatar-progression-storage";
+import { createClient } from "@/lib/supabase/client";
+
+export type ShopItem = {
+  id: string;
+  name: string;
+  type: string;
+  price: number;
+};
+
+type ShopItemRow = {
+  id: string;
+  name: string;
+  type: string;
+};
+
+function getPriceForType(type: string) {
+  switch (type.toLowerCase()) {
+    case "accessory":
+      return 30;
+    case "background":
+      return 40;
+    case "outfit":
+      return 50;
+    case "consumable":
+    case "snack":
+      return 25;
+    default:
+      return 50;
+  }
+}
+
+function mapShopItemRow(row: ShopItemRow): ShopItem {
+  return {
+    id: row.id,
+    name: row.name,
+    type: row.type,
+    price: getPriceForType(row.type),
+  };
+}
+
+async function getAuthenticatedUserId() {
+  const supabase = createClient();
+  const {
+    data: { user },
+    error,
+  } = await supabase.auth.getUser();
+
+  if (error || !user) {
+    return null;
+  }
+
+  return user.id;
+}
+
+export async function getShopItems(): Promise<ShopItem[]> {
+  const supabase = createClient();
+  const { data, error } = await supabase
+    .from("shop_items")
+    .select("id, name, type")
+    .order("type", { ascending: true })
+    .order("name", { ascending: true });
+
+  if (error) {
+    throw new Error(error.message);
+  }
+
+  return ((data ?? []) as ShopItemRow[]).map(mapShopItemRow);
+}
+
+export async function getOwnedItemIds(): Promise<string[]> {
+  const userId = await getAuthenticatedUserId();
+
+  if (!userId) {
+    return [];
+  }
+
+  const supabase = createClient();
+  const { data, error } = await supabase
+    .from("user_items")
+    .select("item_id")
+    .eq("user_id", userId);
+
+  if (error) {
+    throw new Error(error.message);
+  }
+
+  return (data ?? []).map((row) => row.item_id as string);
+}
+
+export async function purchaseShopItem(itemId: string): Promise<number> {
+  const userId = await getAuthenticatedUserId();
+
+  if (!userId) {
+    throw new Error("You must be signed in to purchase items.");
+  }
+
+  const supabase = createClient();
+  const { data: itemRow, error: itemError } = await supabase
+    .from("shop_items")
+    .select("id, name, type")
+    .eq("id", itemId)
+    .maybeSingle();
+
+  if (itemError) {
+    throw new Error(itemError.message);
+  }
+
+  if (!itemRow) {
+    throw new Error("Item not found.");
+  }
+
+  const item = mapShopItemRow(itemRow as ShopItemRow);
+
+  const { data: existingPurchase, error: existingError } = await supabase
+    .from("user_items")
+    .select("item_id")
+    .eq("user_id", userId)
+    .eq("item_id", itemId)
+    .maybeSingle();
+
+  if (existingError) {
+    throw new Error(existingError.message);
+  }
+
+  if (existingPurchase) {
+    throw new Error("You already own this item.");
+  }
+
+  const remainingCoins = await spendCoins(item.price);
+
+  const { error: purchaseError } = await supabase.from("user_items").insert({
+    user_id: userId,
+    item_id: itemId,
+  });
+
+  if (purchaseError) {
+    await adjustCoins(item.price);
+    throw new Error(purchaseError.message);
+  }
+
+  notifyHabitPetDataUpdated();
+  return remainingCoins;
+}
+
+export async function getShopState(): Promise<{
+  coins: number;
+  items: ShopItem[];
+  ownedItemIds: string[];
+}> {
+  const [coins, items, ownedItemIds] = await Promise.all([
+    getCoins(),
+    getShopItems(),
+    getOwnedItemIds(),
+  ]);
+
+  return { coins, items, ownedItemIds };
+}