Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | import { initializeApp } from 'firebase/app';
import { getDatabase, ref, onValue, off, get, DatabaseReference } from 'firebase/database';
import { HNItem, HNItemId } from '@/types/hackernews';
const firebaseConfig = {
databaseURL: import.meta.env.VITE_FIREBASE_DATABASE_URL,
};
const app = initializeApp(firebaseConfig);
const database = getDatabase(app);
export const hackernewsAPI = {
async getNewPostIds(): Promise<HNItemId[]> {
const postRef = ref(database, 'v0/newstories');
const snapshot = await get(postRef);
return snapshot.val() || [];
},
async getTopPostIds(): Promise<HNItemId[]> {
const postRef = ref(database, 'v0/topstories');
const snapshot = await get(postRef);
return snapshot.val() || [];
},
async getItem(id: HNItemId): Promise<HNItem | null> {
const itemRef = ref(database, `v0/item/${id}`);
const snapshot = await get(itemRef);
return snapshot.val();
},
async getItems(ids: HNItemId[]): Promise<HNItem[]> {
const items = await Promise.all(
ids.map(async (id) => {
const itemRef = ref(database, `v0/item/${id}`);
const snapshot = await get(itemRef);
return snapshot.val();
})
);
return items.filter((item): item is HNItem => item !== null);
},
subscribeToNewPosts(callback: (postIds: HNItemId[]) => void): () => void {
const postRef = ref(database, 'v0/newstories');
onValue(postRef, (snapshot) => {
const postIds = snapshot.val() || [];
callback(postIds);
});
return () => off(postRef);
},
subscribeToTopPosts(callback: (postIds: HNItemId[]) => void): () => void {
const postRef = ref(database, 'v0/topstories');
onValue(postRef, (snapshot) => {
const postIds = snapshot.val() || [];
callback(postIds);
});
return () => off(postRef);
},
subscribeToItem(id: HNItemId, callback: (item: HNItem | null) => void): () => void {
const itemRef = ref(database, `v0/item/${id}`);
onValue(itemRef, (snapshot) => {
callback(snapshot.val());
});
return () => off(itemRef);
},
unsubscribe(refPath: string): void {
const dbRef: DatabaseReference = ref(database, refPath);
off(dbRef);
},
};
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