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moshing-mammut
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Refactor loading logic, so that more code is shared between loading older and newer posts

v1.1.0
Max Nuding 2023-04-05 20:28:37 +02:00
parent 2409fa2b8d
commit a3fb47a329
Signed by: phlaym
GPG Key ID: A06651BAB6777237
1 changed files with 31 additions and 22 deletions
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53
src/routes/+page.svelte
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@ -13,22 +13,35 @@ let interval: NodeJS.Timer | null = null;
let moreOlderPostsAvailable = true;
let loadingOlderPosts = false;
function refresh() {
async function fetchPosts(filter: { since?: string, before?: string }): Promise<Post[]> {
const params = new URLSearchParams();
if (data.posts.length > 0) {
params.set('since', data.posts[0].created_at);
if (filter?.since !== undefined) {
params.set('since', filter.since);
}
fetch(`/api/posts?${params}`)
.then(r => r.json())
.then((resp: Post[]) => {
if (filter?.before !== undefined) {
params.set('before', filter.before);
}
const response = await fetch(`/api/posts?${params}`);
return await response.json();
}
function filterDuplicates(posts: Post[]): Post[] {
return posts.filter((obj, index, arr) => {
return arr.map(mapObj => mapObj.url).indexOf(obj.url) === index;
});
}
function refresh() {
let filter = {};
if (data.posts.length > 0) {
filter = { since: data.posts[0].created_at };
}
fetchPosts(filter).then(resp => {
if (resp.length > 0) {
// Prepend new posts, filter dupes
// There shouldn't be any duplicates, but better be safe than sorry
const combined = resp.concat(data.posts);
const filteredPosts = combined.filter((obj, index, arr) => {
return arr.map(mapObj => mapObj.url).indexOf(obj.url) === index;
});
data.posts = filteredPosts;
data.posts = filterDuplicates(resp.concat(data.posts));
}
})
.catch(e => {
@ -57,23 +70,19 @@ onMount(async () => {
}
});
async function loadOlderPosts() {
function loadOlderPosts() {
loadingOlderPosts = true;
const params = new URLSearchParams();
let filter = {};
if (data.posts.length > 0) {
params.set('before', data.posts[data.posts.length - 1].created_at);
filter = { before: data.posts[data.posts.length - 1].created_at };
}
await fetch(`/api/posts?${params}`)
.then(r => r.json())
.then((resp: Post[]) => {
fetchPosts(filter).then(resp => {
if (resp.length > 0) {
// Append old posts, filter dupes
// There shouldn't be any duplicates, but better be safe than sorry
const combined = data.posts.concat(resp);
const filteredPosts = combined.filter((obj, index, arr) => {
return arr.map(mapObj => mapObj.url).indexOf(obj.url) === index;
});
data.posts = filteredPosts;
data.posts = filterDuplicates(data.posts.concat(resp));
moreOlderPostsAvailable = true;
} else {
moreOlderPostsAvailable = false;