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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, View, SafeAreaView, ScrollView, AsyncStorage} from 'react-native';
import { Button } from 'react-native-elements';
import Icon from 'react-native-vector-icons/FontAwesome';
import Search from './components/Search';
import Header from './components/Header'
import FetchMovies from './components/FetchMovies'
import Page from './components/Page'
const App = () => {
// define hook states
const [page, setPage] = useState(1)
const [url, setUrl] = useState("http://it2810-13.idi.ntnu.no:4000/movies?title=&order=-1&sort=Year&page=1")
const [pages, setPages] = useState(1)
const [total, setTotal] = useState(1)
const [prevSearch, setPrev] = useState("loading");
// Sets the initial value of the previous search from AsyncStorage, if there is no previous search on device
// it will be set to null causing the button to execute previous search to not appear
useEffect(() => {
// code to run on component mount
console.log("useEffect")
async function prev() {
try {
const value = await AsyncStorage.getItem("searches");
if (value !== null) {
console.log("value: " + value);
setPrev(JSON.stringify(value).slice(1, -1));
} else {
setPrev(null)
}
} catch (error) {
}
}
prev()
}, [])
// this will be executed from Search.js and will set the local state Url.
// When the url state changes it will fetch new movies from FetchMovies with useEffect since url is given as props.
// we also set page to 1 when a new search or option/filter is selected.
// Also handles previous search much like the UseEffect above, but also updates the prevSearch value with whatever was
// searched for.
const handleOptionChanges = async (search, orderBy, sortBy, filterBy) => {
setPage(1)
setUrl("http://it2810-13.idi.ntnu.no:4000/movies?title="+search+"&order="+orderBy+"&sort="+sortBy+"&page=1&genre="+filterBy)
try {
const value = await AsyncStorage.getItem("searches");
if (value !== null) {
console.log(value);
setPrev(JSON.stringify(value).slice(1, -1));
} else {
setPrev(null)
}
} catch (error) {
}
try {
await AsyncStorage.setItem("searches", search);
} catch (error) {
// Error saving data
}
}
// When navigating to a new page, we update the url, which then runs FetchMovies useEffect, since again the url is given as props.
const handlePageChange = (p) => {
setUrl(url.replace("page="+page,"page="+p));
setPage(p)
}
return (
<View style={styles.container}>
<Header />
<ScrollView style={styles.scrollView}>
<Search handleOptionChanges={handleOptionChanges} prevSearch={prevSearch}/>
<View style={styles.innerView}>
<FetchMovies url={url} setPages={setPages} setTotal={setTotal}/>
{total === 0 ? null : <Page setPage={handlePageChange} page={page} pages={pages}/>}
</View>
</ScrollView>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
//alignItems: 'stretch',
backgroundColor: 'black',
alignItems: 'center',
},
scrollView: {
marginHorizontal: 0,
},
innerView: {
alignItems: 'center',
paddingTop: 20,
maxWidth: 400
},
});
export default App