I am creating a React Native app to view files and modify file names from dropbox. I am using hooks and context. In UserContext I initialized an empty array named "images." I am trying to push the filenames from Dropbox into this array when they are authenticated and get to the home screen. The empty array named "images" is not even showing up at all in hooks and context.
UserContext
import React, {useState, createContext} from 'react';
const UserContext = createContext([{}, () => {}]);
const UserProvider = props => {
const [state, setState] = useState({
userName: '',
email: '',
uid: '',
isLoggedIn: false,
images: [],
});
return (
<UserContext.Provider value={[state, setState]}>
{props.children}
</UserContext.Provider>
);
};
export {UserContext, UserProvider};
Home Screen
import React, {useContext, useEffect} from 'react';
import {View, Text, StyleSheet} from 'react-native';
import {UserContext} from '../context/UserContext';
export default function HomeScreen() {
const [user, setUser] = useContext(UserContext);
useEffect(() => {
var myHeaders = new Headers();
myHeaders.append(
'Authorization',
'Bearer XXXXXXXXXXX',
);
myHeaders.append('Content-Type', 'application/json');
var raw = JSON.stringify({path: `/$(user.username)`});
var requestOptions = {
method: 'POST',
headers: myHeaders,
body: raw,
redirect: 'follow',
};
fetch('https://api.dropboxapi.com/2/files/list_folder', requestOptions)
.then(response => response.json())
.then(data => {
let tmpArray = [];
for (var i = 0; i < data.entries.length; i++) {
tmpArray.push(data.entries[i].name);
}
setUser({
images: [...user.images, tmpArray],
});
})
.catch(error => console.log('error', error));
}, []);
return (
<View style={styles.container}>
<Text>{user.username}</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
},
});
Does anyone know why there isn't even an empty array named images showing up?
This is what is being returned from the API call and I get a TypeError saying data.entries is undefined is not an object? I am bolding the two objects I have identified in the JSON as "cursor" and "entries"
{"cursor": "AAHpbg4wMxtF7FNNUyW1oanIo62MWyHsdWgAG0oTDv_wpJQlTZ1CI1x0KL98E66m2rWaJVb3HEFi1KwW6dXIqEiYoXJkg7WZ2PffRktxvScYOoqd2Emodz9sQIYz2sOGvehvt3bAXbgLdZQGDtGdnmhCCxBiccIYUIFNykFCZjPq4xrOOZd3Ib31zRFzWKjSv2Ol8XELoxXkfTlSoQ9rRFk8", "entries": [{".tag": "file", "client_modified": "2021-03-15T17:39:26Z", "content_hash": "b5bd5c666d2c61594248bc025fb6e35f097596778eafec58c0941fcdb27d95e9", "id": "id:MLd4r5eYWjwAAAAAAAALfA", "is_downloadable": true, "name": "IMG_9440.jpg", "path_display": "/joeault/IMG_9440.jpg", "path_lower": "/joeault/img_9440.jpg", "rev": "015bd9742bbd1190000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 41614}, {".tag": "file", "client_modified": "2021-03-15T17:39:34Z", "content_hash": "4d7544436f557cf8829a034feeb1a607e226b4db4a5e7e8d702f9e0d7ab81850", "id": "id:MLd4r5eYWjwAAAAAAAALgg", "is_downloadable": true, "name": "img046.jpg", "path_display": "/joeault/img046.jpg", "path_lower": "/joeault/img046.jpg", "rev": "015bd9742bbd11a0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 70165}, {".tag": "file", "client_modified": "2021-03-15T17:39:37Z", "content_hash": "97ac717a0344ac319c4ed40d7790d320588fbe2e018413bac983ddea8bf1db26", "id": "id:MLd4r5eYWjwAAAAAAAALhA", "is_downloadable": true, "name": "img054.jpg", "path_display": "/joeault/img054.jpg", "path_lower": "/joeault/img054.jpg", "rev": "015bd9742bbd11b0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 61860}, {".tag": "file", "client_modified": "2021-03-15T17:39:40Z", "content_hash": "106916fd461c4270d981b28001e9fb18195326198eeb96c6a2b0fbc05db08eb0", "id": "id:MLd4r5eYWjwAAAAAAAALhw", "is_downloadable": true, "name": "img077.jpg", "path_display": "/joeault/img077.jpg", "path_lower": "/joeault/img077.jpg", "rev": "015bd9742bbd11c0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 55785}, {".tag": "file", "client_modified": "2021-03-15T17:39:44Z", "content_hash": "8f5eaedcc9c6b833ba76d18dfd5387d0909fc2186dc183942a6192dc585fbea0", "id": "id:MLd4r5eYWjwAAAAAAAALiQ", "is_downloadable": true, "name": "img079.jpg", "path_display": "/joeault/img079.jpg", "path_lower": "/joeault/img079.jpg", "rev": "015bd9742bbd11d0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 68128}, {".tag": "file", "client_modified": "2021-03-15T17:39:52Z", "content_hash": "658ebee2da4ea30164751b02cf785c84c7717383e9aa8eeb26daa4d57423d6cc", "id": "id:MLd4r5eYWjwAAAAAAAALkA", "is_downloadable": true, "name": "Untitled-10.jpg", "path_display": "/joeault/Untitled-10.jpg", "path_lower": "/joeault/untitled-10.jpg", "rev": "015bd9742bbd11e0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 57502}, {".tag": "file", "client_modified": "2021-03-15T17:39:05Z", "content_hash": "4467b389d485dab36b2f07910b2c88a4702c6313bb7edfd462f07f43281cf9b9", "id": "id:MLd4r5eYWjwAAAAAAAALbA", "is_downloadable": true, "name": "1958.jpg", "path_display": "/joeault/1958.jpg", "path_lower": "/joeault/1958.jpg", "rev": "015bd9742bbd11f0000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 74876}, {".tag": "file", "client_modified": "2021-03-15T17:39:21Z", "content_hash": "cd767e1480e1db87c842574d131f2256ae99f5423fcfec644b7a1a0e84115902", "id": "id:MLd4r5eYWjwAAAAAAAALeA", "is_downloadable": true, "name": "1986 family photo.jpg", "path_display": "/joeault/1986 family photo.jpg", "path_lower": "/joeault/1986 family photo.jpg", "rev": "015bd9742bbd1200000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 73519}, {".tag": "file", "client_modified": "2021-03-15T17:39:09Z", "content_hash": "517316127dba91558a5155dd1fa7f6ecc0016d4fbdebb04a06674efe5325b169", "id": "id:MLd4r5eYWjwAAAAAAAALbw", "is_downloadable": true, "name": "1974 kids halloween.jpg", "path_display": "/joeault/1974 kids halloween.jpg", "path_lower": "/joeault/1974 kids halloween.jpg", "rev": "015bd9742bbd1210000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 82047}, {".tag": "file", "client_modified": "2021-03-15T17:39:10Z", "content_hash": "a11064b5b64e5fb0c5b9e19eca7542d67ff0e89a85e083fbc13d6f108206bbe1", "id": "id:MLd4r5eYWjwAAAAAAAALcA", "is_downloadable": true, "name": "1977 Don helicopter.jpg", "path_display": "/joeault/1977 Don helicopter.jpg", "path_lower": "/joeault/1977 don helicopter.jpg", "rev": "015bd9742bbd1220000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 78497}, {".tag": "file", "client_modified": "2021-03-15T17:39:15Z", "content_hash": "fea587a81b1a34c76d3cc6069f59a6380591b766b99930453ee94fa9a062d2da", "id": "id:MLd4r5eYWjwAAAAAAAALdA", "is_downloadable": true, "name": "1983 Gay Nell Flower necklace.jpg", "path_display": "/joeault/1983 Gay Nell Flower necklace.jpg", "path_lower": "/joeault/1983 gay nell flower necklace.jpg", "rev": "015bd9742bbd1230000000229a28d10", "server_modified": "2021-03-15T18:17:20Z", "size": 103859}, {".tag": "file", "client_modified": 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