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React Native Hooks: To-Do App with CRUD Operations and AsyncStorage https://pajaaleksic.com/react-native-hooks-to-do-app-with-crud-operations-and-asyncstorage/
import React, {useState, useEffect} from 'react';
import {
View,
Text,
TextInput,
Keyboard,
ScrollView,
SafeAreaView,
TouchableOpacity,
} from 'react-native';
import DropdownAlert from 'react-native-dropdownalert';
import {AddButton} from '../components/Button';
import Icon from 'react-native-vector-icons/MaterialIcons';
import AsyncStorage from '@react-native-community/async-storage';
const validateEmail = email => {
var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(email);
};
import styles from '../style/style';
const Tasks = () => {
const [name, setName] = useState('');
const [email, setEmail] = useState('');
const [phone, setPhone] = useState('');
const [data, setData] = useState([]);
const [toggle, setToggle] = useState('true');
const [itemId, setItemId] = useState(null);
const saveData = async () => {
if (
(name !== null && name !== '',
email !== null && email !== '',
phone !== null && phone !== '')
) {
let user = {
name,
email,
phone,
key: Math.random(),
};
if (!validateEmail(email) || phone.length !== 10) {
this.dropDownAlertRef.alertWithType(
'error',
'Error',
'Invalid email address or phone number.',
);
} else {
const arrData = [user]; // [{ name, email, phone}]
const storedData = await AsyncStorage.getItem('user');
const storedDataParsed = JSON.parse(storedData);
setData(storedDataParsed);
let newData = [];
if (storedData === null) {
// save
await AsyncStorage.setItem('user', JSON.stringify(arrData));
} else {
newData = [...storedDataParsed, user];
await AsyncStorage.setItem('user', JSON.stringify(newData));
}
Keyboard.dismiss();
setName('');
setEmail('');
setPhone('');
this.dropDownAlertRef.alertWithType(
'success',
'Success',
'Task saved successfully.',
);
}
} else {
setTimeout(() => {
this.dropDownAlertRef.alertWithType(
'error',
'Error',
'Please fill all the fields',
);
}, 1000);
}
};
useEffect(() => {
//AsyncStorage.clear();
retrieveData();
});
const retrieveData = async () => {
try {
const valueString = await AsyncStorage.getItem('user');
const value = JSON.parse(valueString);
setData(value);
} catch (error) {
console.log(error);
}
};
const clearData = async id => {
if (data !== null) {
const newData = data.filter((_, index) => index !== id);
setData(newData);
await AsyncStorage.setItem('user', JSON.stringify(newData));
}
this.dropDownAlertRef.alertWithType(
'success',
'Success',
'Task removed successfully.',
);
};
const highlightData = async id => {
if (data !== null) {
const highlightedData = data.map((item, index) => {
if (index === id) {
item.show = !item.show;
}
return item;
});
setData(highlightedData);
await AsyncStorage.setItem('user', JSON.stringify(highlightedData));
}
};
const changeData = async id => {
setToggle(false);
const changedData = data.map((item, index) => {
if (index === id) {
setName(item.name);
setEmail(item.email);
setPhone(item.phone);
}
return item;
});
setData(changedData);
setItemId(id);
await AsyncStorage.setItem('user', JSON.stringify(changedData));
};
const updateData = async () => {
setToggle(true);
data[itemId].name = name;
data[itemId].phone = phone;
data[itemId].email = email;
await AsyncStorage.setItem('user', JSON.stringify(data));
Keyboard.dismiss();
setName('');
setEmail('');
setPhone('');
this.dropDownAlertRef.alertWithType(
'success',
'Success',
'Task updated successfully.',
);
};
return (
<SafeAreaView style={styles.container}>
<View>
<View style={[styles.pv, styles.ph]}>
<Text style={[styles.text, styles.pv]}>Personal details</Text>
<TextInput
style={[styles.pv, styles.input]}
placeholder="Full Name"
value={name}
onChangeText={text => setName(text)}
/>
<TextInput
style={[styles.pv, styles.input]}
placeholder="Email Address"
keyboardType="email-address"
value={email}
onChangeText={text => setEmail(text)}
/>
<TextInput
style={[styles.pv, styles.input]}
placeholder="Phone"
value={phone}
keyboardType="phone-pad"
onChangeText={text => setPhone(text)}
/>
<AddButton
title={toggle ? 'save data' : 'update changes'}
name="add"
onPress={toggle ? saveData : updateData}
/>
<Text style={[styles.text, styles.pv]}>List of Individuals</Text>
<ScrollView style={{height: '60%', paddingVertical: 10}}>
{data !== null
? data.map((item, index) => {
const highlightColor = item.show ? 'gold' : '#e3e3e3';
return (
<View style={[styles.pv, styles.ph]} key={index}>
<View style={[styles.row]}>
<Text>{index + 1}. </Text>
<View>
<Text style={styles.btnText}>{item.name}</Text>
<Text style={styles.email}>{item.email}</Text>
<Text style={styles.email}>{item.phone}</Text>
</View>
</View>
<View style={[styles.row, styles.end]}>
<TouchableOpacity
onPress={() => clearData(index)}
style={styles.ph}>
<Icon name="close" size={20} />
</TouchableOpacity>
<TouchableOpacity
onPress={() => highlightData(index)}
style={styles.ph}>
<Icon name="star" size={20} color={highlightColor} />
</TouchableOpacity>
<TouchableOpacity
onPress={() => changeData(index)}
style={styles.ph}>
<Icon name="create" size={20} />
</TouchableOpacity>
</View>
</View>
);
})
: null}
</ScrollView>
</View>
</View>
<DropdownAlert ref={ref => (this.dropDownAlertRef = ref)} />
</SafeAreaView>
);
};
Tasks.navigationOptions = navigation => ({
title: 'Tasks',
});
export default Tasks;
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