FoodOrderer: Basics

package.json

@@ -19,6 +19,7 @@
     "typescript": "^5.6.3"
   },
   "devDependencies": {
+    "decimal.js": "^10.4.3",
     "react-router-dom": "^6.28.0",
     "tailwindcss": "^3.4.15"
   },

src/FoodOrderer.tsx

@@ -1,72 +1,100 @@
 import React, { useState } from "react";
+import Decimal from 'decimal.js';
 
 interface ShopItem {
   name: string,
-  need: number,    // 需求数量 
+  need: number,    // 需求数量
-  provide: number, // 提供的数量
+  provider: {
+    name: string
+    price: number
+    storage: number // 库存
+  }, // 提供者的信息
   image: {
     src: string
   }
 }
 
+
+const getNeedPrice = (item: ShopItem) => {
+  let result = new Decimal(item.provider.price).times(item.need)
+  return result.toNumber()
+}
+
 const shopItems: ShopItem[] = [
   {
     name: "Apple",
-    need: 10,
+    need: 999,
-    provide: 5,
+    provider: {
+      name: "Fresh Farms",
+      price: 2.5,
+      storage: 1000,
+    },
     image: {
-      src: "https://i.imgur.com/FsNUv2x.jpeg"
+      src: "https://i.imgur.com/FsNUv2x.jpeg",
-    }
+    },
   },
   {
     name: "Orange Jam",
     need: 8,
-    provide: 10,
+    provider: {
+      name: "Sweet Treats Co.",
+      price: 4.0,
+      storage: 50,
+    },
     image: {
-      src: "https://i.imgur.com/hB46Z9s.png"
+      src: "https://i.imgur.com/hB46Z9s.png",
-    }
+    },
   },
   {
     name: "Milk (Gone bad)",
     need: 0,
-    provide: 3,
+    provider: {
+      name: "Dairy Delights",
+      price: 1.2,
+      storage: 20,
+    },
     image: {
-      src: "https://i.imgur.com/ZV7vzDu.png"
+      src: "https://i.imgur.com/ZV7vzDu.png",
-    }
+    },
   },
   {
     name: "Bread",
     need: 12,
-    provide: 6,
+    provider: {
+      name: "Baker's Best",
+      price: 3.0,
+      storage: 30,
+    },
     image: {
-      src: "https://i.imgur.com/qBn8jWS.jpeg"
+      src: "https://i.imgur.com/qBn8jWS.jpeg",
-    }
+    },
-  }
+  },
 ];
 
 
+
 function FoodList({ list, setList }: {
   list: ShopItem[],
   setList: React.Dispatch<React.SetStateAction<ShopItem[]>>
 }) {
-  enum ButtonOperation {INCREASE , DECREASE}
+  enum ButtonOperation { INCREASE, DECREASE }
-  const handleVolumeButton = (item: ShopItem ,operation: ButtonOperation) => {
+  const handleVolumeButton = (item: ShopItem, operation: ButtonOperation) => {
     const nowNeed = item.need
     switch (operation) {
       case ButtonOperation.INCREASE:
-        if (nowNeed >= item.provide){
+        if (nowNeed >= item.provider.storage) {
           return
         }
-        setList(list.map((it)=> 
+        setList(list.map((it) =>
-          it == item? {...it,need: nowNeed+1}:it
+          it == item ? { ...it, need: nowNeed + 1 } : it
         ))
         break
       case ButtonOperation.DECREASE:
-        if (nowNeed <= 0){
+        if (nowNeed <= 0) {
           return
         }
-        setList(list.map((it)=> 
+        setList(list.map((it) =>
-          it == item? {...it,need: nowNeed-1}:it
+          it == item ? { ...it, need: nowNeed - 1 } : it
         ))
         break
     }
@@ -76,21 +104,51 @@ function FoodList({ list, setList }: {
   return (
     <div className="table gap-3 min-w-max space-y-3 mx-auto items-center">
       {list.map((item) =>
-        <div key={item.name} className="flex gap-5 bg-slate-200 rounded-md shadow-md border-spacing-1 px-5 py-2">
+        <div
+          key={item.name}
+          className="flex gap-5 bg-slate-200 rounded-md shadow-md border-spacing-1 px-5 py-3 relative"
+        >
           <img className="size-24 rounded-full" {...item.image} />
-          <div>
+          <div className="flex-1">
             <p className="text-3xl">{item.name}</p>
-            <div className="flex">
+            <p className="text-base text-gray-400">{item.provider.name}</p>
-              <button 
+            <p className="text-sm text-zinc-500">{item.provider.price} 元/个</p>
-                onClick={()=>handleVolumeButton(item,ButtonOperation.DECREASE)} 
+            <p className="text-sm text-neutral-500">库存: {item.provider.storage}</p>
-                className="size-6 bg-lime-50 rounded-2xl">-</button>
+            
-              <p>{item.need}</p>
+          </div>
-              <button 
+
-                onClick={()=>handleVolumeButton(item,ButtonOperation.INCREASE)}
+          <div className="flex flex-col justify-between items-end gap-2">
-                className="size-6 bg-red-50 rounded-2xl">+</button>
+            <p className="text-xl text-stone-700 text-center">{getNeedPrice(item)} 元</p>
+            <div className="flex items-center gap-1">
+              <button
+                onClick={() => handleVolumeButton(item, ButtonOperation.DECREASE)}
+                className="w-8 h-8 flex items-center justify-center bg-lime-50 rounded-full text-lg font-bold"
+              >
+                -
+              </button>
+              <input
+                type="number"
+                value={item.need}
+                onChange={(e) => {
+                  const value = parseInt(e.target.value, 10) || 0;
+                  if (value <= item.provider.storage && value >= 0) {
+                    setList(list.map((it) =>
+                      it == item ? { ...it, need: value } : it
+                    ))
+                  }
+                }}
+                className="text-center w-16 h-8 bg-gray-50 rounded-md border border-gray-300 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:border-blue-400 text-base appearance-none pl-1.5"
+                />              
+              <button
+                onClick={() => handleVolumeButton(item, ButtonOperation.INCREASE)}
+                className="w-8 h-8 flex items-center justify-center bg-red-50 rounded-full text-lg font-bold"
+              >
+                +
+              </button>
             </div>
           </div>
         </div>
+
       )}
     </div>
   )
@@ -100,8 +158,10 @@ function FoodList({ list, setList }: {
 const FoodOrderer = () => {
   const [items, setItems] = useState<ShopItem[]>(shopItems)
   return (
-    <div className="items-center">
+    <div className="flex flex-col items-center">
-      <p className="text-center">点些什么</p>
+      <p className="text-center text-2xl sm:text-5xl py-5 sm:py-10 bg-gradient-to-r from-blue-600 to-pink-600 via-green-700 inline-block text-transparent bg-clip-text">
+        点些什么
+      </p>
       <FoodList list={items} setList={setItems} />
     </div>
   )

yarn.lock

@@ -3616,7 +3616,7 @@ debug@^3.2.7:
   dependencies:
     ms "^2.1.1"
 
-decimal.js@^10.2.1:
+decimal.js@^10.2.1, decimal.js@^10.4.3:
   version "10.4.3"
   resolved "https://registry.yarnpkg.com/decimal.js/-/decimal.js-10.4.3.tgz#1044092884d245d1b7f65725fa4ad4c6f781cc23"
   integrity sha512-VBBaLc1MgL5XpzgIP7ny5Z6Nx3UrRkIViUkPUdtl9aya5amy3De1gsUUSB1g3+3sExYNjCAsAznmukyxCb1GRA==