I am using redux-tookit
, rtk-query
(for querying other api’s and not just Firebase) and Firebase
(for authentication and db).
The code below works just fine for retrieving and caching the data but I wish to take advantage of both rtk-query
caching as well as Firebase
event subscribing, so that when ever a change is made in the DB (from any source even directly in firebase console) the cache is updated.
I have tried both updateQueryCache
and invalidateTags
but so far I am not able to find an ideal approach that works.
Any assistance in pointing me in the right direction would be greatly appreciated.
// firebase.ts
export const onRead = (
collection: string,
callback: (snapshort: DataSnapshot) => void,
options: ListenOptions = { onlyOnce: false }
) => onValue(ref(db, collection), callback, options);
export async function getCollection<T>(
collection: string,
onlyOnce: boolean = false
): Promise<T> {
let timeout: NodeJS.Timeout;
return new Promise<T>((resolve, reject) => {
timeout = setTimeout(() => reject('Request timed out!'), ASYNC_TIMEOUT);
onRead(collection, (snapshot) => resolve(snapshot.val()), { onlyOnce });
}).finally(() => clearTimeout(timeout));
}
// awards.ts
const awards = dbApi
.enhanceEndpoints({ addTagTypes: ['Themes'] })
.injectEndpoints({
endpoints: (builder) => ({
getThemes: builder.query<ThemeData[], void>({
async queryFn(arg, api) {
try {
const { auth } = api.getState() as RootState;
const programme = auth.user?.unit.guidingProgramme!;
const path = `/themes/${programme}`;
const themes = await getCollection<ThemeData[]>(path, true);
return { data: themes };
} catch (error) {
return { error: error as FirebaseError };
}
},
providesTags: ['Themes'],
keepUnusedDataFor: 1000 * 60
}),
getTheme: builder.query<ThemeData, string | undefined>({
async queryFn(slug, api) {
try {
const initiate = awards.endpoints.getThemes.initiate;
const getThemes = api.dispatch(initiate());
const { data } = (await getThemes) as ApiResponse<ThemeData[]>;
const name = slug
?.split('-')
.map(
(value) =>
value.substring(0, 1).toUpperCase() +
value.substring(1).toLowerCase()
)
.join(' ');
return { data: data?.find((theme) => theme.name === name) };
} catch (error) {
return { error: error as FirebaseError };
}
},
keepUnusedDataFor: 0
})
})
});