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App.js
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App.js
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import React, { useState, useEffect } from "react";
import {
StyleSheet,
Text,
TextInput,
View,
Button,
ScrollView
} from "react-native";
import AppBar from "./src/components/AppBar";
import Todo from "./src/components/Todo";
import TodoList from "./src/components/TodoList";
export default function App() {
const [title, setTitle] = useState("");
// iniitalize empty object todo
const [todo, setTodo] = useState({});
// Initalize empty array to store todos
const [todos, setTodos] = useState([]);
// function to add todo object in todo list
const addTodo = () => {
if (title.length > 0) {
// Add todo to the list
setTodos([...todos, { key: Date.now(), name: title, isChecked: false }]);
// clear the value of the textfield
setTitle("");
}
};
// function to mark todo as checked or unchecked
const checkTodo = id => {
// loop through todo list and look for the the todo that matches the given id param
// update the state using setTodos function
setTodos(
todos.map(todo => {
if (todo.key === id) {
todo.isChecked = !todo.isChecked;
}
return todo;
})
);
};
// function to delete todo from the todo list
const deleteTodo = id => {
// loop through todo list and return todos that don't match the id
// update the state using setTodos function
setTodos(todos.filter(todo => {
return todo.key !== id;
}));
};
useEffect(() => {
console.log(todos.length, "TodoList length");
//console.log(todos);
}, [todos]);
return (
<View style={styles.container}>
<View style={styles.statusBar}></View>
<AppBar />
<View style={styles.todo}>
<TextInput
placeholder="Add a todo"
value={title}
onChangeText={value => setTitle(value)}
style={styles.textbox}
/>
<Button title="Add" color="#7F39FB" onPress={() => addTodo()} />
</View>
<ScrollView>
{todos.map(todo => (
<TodoList
key={todo.key}
todo={todo}
checkTodo={checkTodo}
deleteTodo={deleteTodo}
/>
))}
</ScrollView>
</View>
);
}
const styles = StyleSheet.create({
statusBar: {
backgroundColor: "#7F39FB",
color: "#fff",
width: "100%",
height: 30
},
container: {
flex: 1,
backgroundColor: "#fff",
alignItems: "center",
justifyContent: "flex-start"
},
todo: {
flexDirection: "row",
width: "100%",
justifyContent: "center",
alignItems: "center"
},
textbox: {
borderWidth: 1,
borderColor: "#7F39FB",
borderRadius: 8,
padding: 10,
margin: 10,
width: "80%"
}
});