function MainComponent() { const [searchQuery, setSearchQuery] = React.useState(""); const [cartItems, setCartItems] = React.useState([]); const [user, setUser] = React.useState(null); const handleSearch = (event)=>setSearchQuery(event.target.value); const addToCart = (product)=>setCartItems([ ...cartItems, product ]); const removeFromCart = (productId)=>setCartItems(cartItems.filter((item)=>item.id !== productId)); const updateItemQuantity = (productId, quantity)=>setCartItems(cartItems.map((item)=>item.id === productId ? { ...item, quantity } : item)); const handleLogin = (user)=>setUser(user); const handleLogout = ()=>setUser(null); const products = []; // This should be fetched from an API const filteredProducts = products.filter((product)=>product.name.toLowerCase().includes(searchQuery.toLowerCase())); return /*#__PURE__*/ React.createElement("div", { className: "font-sans p-4", __source: { fileName: "", lineNumber: 17, columnNumber: 5 }, __self: this }, /*#__PURE__*/ React.createElement("header", { className: "flex justify-between items-center mb-4", __source: { fileName: "", lineNumber: 18, columnNumber: 7 }, __self: this }, /*#__PURE__*/ React.createElement("h1", { className: "text-2xl", __source: { fileName: "", lineNumber: 19, columnNumber: 9 }, __self: this }, "商品カタログ"), /*#__PURE__*/ React.createElement("input", { type: "text", placeholder: "検索...", value: searchQuery, onChange: handleSearch, className: "border px-2 py-1", name: "search", __source: { fileName: "", lineNumber: 20, columnNumber: 9 }, __self: this }), user ? /*#__PURE__*/ React.createElement("button", { onClick: handleLogout, className: "px-4 py-2 bg-red-500 text-white", __source: { fileName: "", lineNumber: 29, columnNumber: 11 }, __self: this }, "ログアウト") : /*#__PURE__*/ React.createElement("button", { className: "px-4 py-2 bg-blue-500 text-white", __source: { fileName: "", lineNumber: 31, columnNumber: 11 }, __self: this }, "ログイン/新規登録")), /*#__PURE__*/ React.createElement("main", { __source: { fileName: "", lineNumber: 34, columnNumber: 7 }, __self: this }, /*#__PURE__*/ React.createElement("div", { className: "grid grid-cols-1 md:grid-cols-3 gap-4", __source: { fileName: "", lineNumber: 35, columnNumber: 9 }, __self: this }, filteredProducts.map((product)=>/*#__PURE__*/ React.createElement("div", { key: product.id, className: "border p-4", __source: { fileName: "", lineNumber: 37, columnNumber: 13 }, __self: this }, /*#__PURE__*/ React.createElement("h2", { className: "text-xl", __source: { fileName: "", lineNumber: 38, columnNumber: 15 }, __self: this }, product.name), /*#__PURE__*/ React.createElement("p", { __source: { fileName: "", lineNumber: 39, columnNumber: 15 }, __self: this }, product.description), /*#__PURE__*/ React.createElement("p", { __source: { fileName: "", lineNumber: 40, columnNumber: 15 }, __self: this }, "価格: ", product.price, "円"), /*#__PURE__*/ React.createElement("p", { __source: { fileName: "", lineNumber: 41, columnNumber: 15 }, __self: this }, "在庫状況: ", product.inStock ? "在庫あり" : "在庫なし"), /*#__PURE__*/ React.createElement("button", { onClick: ()=>addToCart(product), className: "px-4 py-2 bg-green-500 text-white mt-2", __source: { fileName: "", lineNumber: 42, columnNumber: 15 }, __self: this }, "カートに追加"))))), /*#__PURE__*/ React.createElement("aside", { className: "mt-4", __source: { fileName: "", lineNumber: 47, columnNumber: 7 }, __self: this }, /*#__PURE__*/ React.createElement("h2", { className: "text-xl", __source: { fileName: "", lineNumber: 48, columnNumber: 9 }, __self: this }, "カート"), /*#__PURE__*/ React.createElement("ul", { __source: { fileName: "", lineNumber: 49, columnNumber: 9 }, __self: this }, cartItems.map((item)=>/*#__PURE__*/ React.createElement("li", { key: item.id, className: "flex justify-between items-center border-b py-2", __source: { fileName: "", lineNumber: 51, columnNumber: 13 }, __self: this }, /*#__PURE__*/ React.createElement("span", { __source: { fileName: "", lineNumber: 52, columnNumber: 15 }, __self: this }, item.name), /*#__PURE__*/ React.createElement("div", { className: "flex items-center", __source: { fileName: "", lineNumber: 53, columnNumber: 15 }, __self: this }, /*#__PURE__*/ React.createElement("input", { type: "number", value: item.quantity, min: "1", onChange: (e)=>updateItemQuantity(item.id, parseInt(e.target.value)), className: "w-16 border mx-2", name: `quantity-${item.id}`, __source: { fileName: "", lineNumber: 54, columnNumber: 17 }, __self: this }), /*#__PURE__*/ React.createElement("button", { onClick: ()=>removeFromCart(item.id), className: "px-4 py-2 bg-red-500 text-white", __source: { fileName: "", lineNumber: 62, columnNumber: 17 }, __self: this }, "削除")))))), /*#__PURE__*/ React.createElement("footer", { className: "mt-4", __source: { fileName: "", lineNumber: 68, columnNumber: 7 }, __self: this }, cartItems.length > 0 && /*#__PURE__*/ React.createElement("button", { className: "px-4 py-2 bg-blue-500 text-white", __source: { fileName: "", lineNumber: 70, columnNumber: 11 }, __self: this }, "購入手続きへ進む"))); }