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| import { useState } from "react";
const initialFriends = [
{
id: 118836,
name: "Clark",
image: "https://i.pravatar.cc/48?u=118836",
balance: -7,
},
{
id: 933372,
name: "Sarah",
image: "https://i.pravatar.cc/48?u=933372",
balance: 20,
},
{
id: 499476,
name: "Anthony",
image: "https://i.pravatar.cc/48?u=499476",
balance: 0,
},
];
function Button({ children, onClick }) {
return (
<button className="button" onClick={onClick}>
{children}
</button>
);
}
export default function App() {
const [showAddFriend, setShowAddFriend] = useState(false);
const [friends, setFriends] = useState(initialFriends);
const [selectedFriend, setSelectFriend] = useState(null);
function handleAddFriend(friend) {
setFriends((friends) => [...friends, friend]);
setShowAddFriend(false);
}
function handleSelection(friend) {
setSelectFriend((cur) => (cur?.id === friend.id ? null : friend));
setShowAddFriend(false);
}
function handleSplitBill(value) {
setFriends((friends) =>
friends.map((friend) =>
friend.id === selectedFriend.id
? { ...friend, balance: friend.balance + value }
: friend
)
);
setSelectFriend(null);
}
return (
<div className="app">
<div className="sidebar">
<FriendList
friends={friends}
onSelection={handleSelection}
selectedFriend={selectedFriend}
/>
{showAddFriend && <FormAddFriend onAddFriends={handleAddFriend} />}
<Button onClick={() => setShowAddFriend((e) => !e)}>
{showAddFriend ? "Close" : "Add friend"}
</Button>
</div>
{selectedFriend && (
<FormSplitBill
selectedFriend={selectedFriend}
onSplitBill={handleSplitBill}
key={selectedFriend.id}
/>
)}
</div>
);
}
function FriendList({ friends, onSelection, selectedFriend }) {
return (
<ul>
{friends.map((friend) => (
<Friend
friend={friend}
key={friend.id}
onSelection={onSelection}
selectedFriend={selectedFriend}
/>
))}
</ul>
);
}
function Friend({ friend, onSelection, selectedFriend }) {
const isSelected = selectedFriend?.id === friend.id;
return (
<li className={isSelected ? "selected" : ""}>
<img src={friend.image} alt={friend.name} />
<h3>{friend.name}</h3>
{friend.balance < 0 && (
<p className="red">
You owe {friend.name} {Math.abs(friend.balance)}$
</p>
)}
{friend.balance > 0 && (
<p className="green">
{friend.name} owes you {friend.balance}$
</p>
)}
{friend.balance === 0 && <p>You and your friend are even</p>}
<Button onClick={() => onSelection(friend)}>
{isSelected ? "Close" : "Select"}
</Button>
</li>
);
}
function FormAddFriend({ onAddFriends }) {
const [name, setName] = useState("");
const [image, setImage] = useState("https://i.pravatar.cc/48");
function handleSubmit(e) {
e.preventDefault();
if (!name || !image) return;
const id = crypto.randomUUID();
const newFriend = {
id,
name,
image: `${image}?=${id}`,
balance: 0,
};
onAddFriends(newFriend);
setName("");
setImage("https://i.pravatar.cc/48");
}
return (
<form className="form-add-friend" onSubmit={handleSubmit}>
<label>👧🏻Friend name</label>
<input
type="text"
value={name}
onChange={(e) => setName(e.target.value)}
/>
<label>🧣Image URL</label>
<input
type="text"
value={image}
onChange={(e) => setImage(e.target.value)}
/>
<Button>Add</Button>
</form>
);
}
function FormSplitBill({ selectedFriend, onSplitBill }) {
const [bill, setBill] = useState("");
const [paidByUser, setPaidByUser] = useState("");
const paidByFriend = bill ? bill - paidByUser : "";
const [whoIsPaying, setWhoIsPaying] = useState("user");
function handleSubmit(e) {
e.preventDefault();
if (!bill || !paidByUser) return;
onSplitBill(whoIsPaying === "user" ? paidByFriend : -paidByUser);
}
return (
<form className="form-split-bill" onSubmit={handleSubmit}>
<h2>Split a Bill With {selectedFriend.name}</h2>
<label>💜Bill Value</label>
<input
type="text"
value={bill}
onChange={(e) => setBill(Number(e.target.value))}
/>
<label>🔆Your expense</label>
<input
type="text"
value={paidByUser}
onChange={(e) => setPaidByUser(Number(e.target.value))}
/>
<label>☀️{selectedFriend.name}'s expense</label>
<input type="text" value={paidByFriend} disabled />
<label>🛎️Who</label>
<select
value={whoIsPaying}
onChange={(e) => setWhoIsPaying(e.target.value)}
>
<option value="user">You</option>
<option value="friend">{selectedFriend.name}</option>
</select>
<Button>Split bill</Button>
</form>
);
}
|
