Created
April 8, 2021 17:20
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Trade Journal App Home Scene
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| import React, {useEffect, useState} from 'react'; | |
| import {FlatList, Text, StyleSheet, TouchableHighlight} from 'react-native'; | |
| import {Empty, Placeholder, OverlayContainer} from 'mesan-react-native-components' | |
| import {showSuccessAlert, showErrorAlert} from 'mesan-react-native-components/utils' | |
| import TradeItem from "../components/TradeItem"; | |
| import {useHome} from "../provider.js"; | |
| import {getTrades, deleteTrade} from "../service"; | |
| export default function HomeList(props) { | |
| const {navigation} = props; | |
| const {navigate} = navigation; | |
| //1 - DECLARE VARIABLES | |
| const [modalVisible, setModalVisible] = useState(false); //** | |
| const [statusMessage, setStatusMessage] = useState(""); //** | |
| const { state, fetch, crud} = useHome(); | |
| let {isFetching, isRefreshing, error, data} = state; | |
| //================================================================================================== | |
| //2 - MAIN CODE BEGINS HERE | |
| useEffect(() => { | |
| getData() | |
| }, []); | |
| //================================================================================================== | |
| //3 - GET DATA | |
| function getData(refresh = false) { | |
| let apiRequest = () => getTrades(); | |
| fetch(apiRequest, refresh, "trades"); | |
| } | |
| let onRefresh = () => getData(true); | |
| //================================================================================================== | |
| //4a - ON CREATE | |
| const onCreateTrade = () => navigate('AddEdit'); | |
| //4b - ON EDIT | |
| const onEditTrade = (trade) => navigate('AddEdit', {id: trade['id']}); | |
| //4c - ON DELETE | |
| async function onDeleteTrade(trade) { | |
| setStatusMessage("Deleting Trade...."); | |
| setModalVisible(true); | |
| try { | |
| await deleteTrade(trade['id']); | |
| setModalVisible(false); setStatusMessage(""); | |
| crud.delete(trade); | |
| setTimeout(() => showSuccessAlert("The Trade has been deleted successfully.", 'Trade Deleted'), 200) | |
| } catch (error) { | |
| setModalVisible(false); | |
| setStatusMessage(""); | |
| setTimeout(() => showErrorAlert(error.message), 200) | |
| } | |
| } | |
| //================================================================================================== | |
| //FLATLIST ITEMS RENDERING | |
| //5a - RENDER ITEM | |
| const renderItem = (props) => { | |
| let {item} = props; | |
| // let onPress = () => navigate("TradeDetails", {id: item['id']}); | |
| let onEdit = () => onEditTrade(item); | |
| let onDelete = () => onDeleteTrade(item); | |
| return (<TradeItem trade={item} onEdit={onEdit} onDelete={onDelete}/>)// onPress={onPress} | |
| }; | |
| //5b - RENDER EMPTY | |
| const renderEmpty = () => { | |
| return <Empty message={"There are no trades available."}/> | |
| }; | |
| //================================================================================================== | |
| // 6 - FLATLIST PROPS | |
| const keyExtractor = (item, index) => `trade_${item['id'].toString()}${index.toString()}`; | |
| const refreshProps = {refreshing: isRefreshing, onRefresh}; | |
| //================================================================================================== | |
| //7 - RENDER VIEW | |
| if (isFetching || error) return <Placeholder isFetching={isFetching} error={error} onRetry={getData}/>; | |
| return ( | |
| <OverlayContainer message={statusMessage} modalVisible={modalVisible}> | |
| <FlatList | |
| data={data} | |
| extraData={state} | |
| initialNumToRender={5} | |
| renderItem={renderItem} | |
| ListEmptyComponent={renderEmpty} | |
| style={{backgroundColor: "#ffffff"}} | |
| contentContainerStyle={{minHeight: '100%'}} | |
| keyExtractor={keyExtractor} | |
| {...refreshProps}/> | |
| <TouchableHighlight style={styles.floatingButton} underlayColor='#ff7043' onPress={onCreateTrade}> | |
| <Text style={{fontSize: 25, color: 'white'}}>+</Text> | |
| </TouchableHighlight> | |
| </OverlayContainer> | |
| ); | |
| } | |
| const styles = StyleSheet.create({ | |
| container: { | |
| flex:1, | |
| backgroundColor: '#F5F5F5' | |
| }, | |
| activityIndicatorContainer:{ | |
| backgroundColor: "#fff", | |
| alignItems: 'center', | |
| justifyContent: 'center', | |
| flex: 1, | |
| }, | |
| floatingButton:{ | |
| backgroundColor: '#6B9EFA', | |
| borderColor: '#6B9EFA', | |
| height: 55, | |
| width: 55, | |
| borderRadius: 55 / 2, | |
| alignItems: 'center', | |
| justifyContent: 'center', | |
| position: 'absolute', | |
| bottom: 60, | |
| right: 15, | |
| shadowColor: "#000000", | |
| shadowOpacity: 0.5, | |
| shadowRadius: 2, | |
| shadowOffset: { | |
| height: 1, | |
| width: 0 | |
| } | |
| } | |
| }); |
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