createTimeline: fix viewport and dupelication
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thislight
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2 changed files with 78 additions and 155 deletions
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@ -11,114 +11,19 @@ import {
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} from "solid-js";
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import { createStore } from "solid-js/store";
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type TimelineFetchTips = {
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direction?: "new" | "old";
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};
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type Timeline = {
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list(params: {
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/** Return results older than this ID. */
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readonly maxId?: string;
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/** Return results newer than this ID. */
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readonly sinceId?: string;
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/** Get a list of items with ID greater than this value excluding this ID */
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readonly minId?: string;
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/** Maximum number of results to return per page. Defaults to 40. NOTE: Pagination is done with the Link header from the response. */
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readonly limit?: number;
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}): mastodon.Paginator<mastodon.v1.Status[], unknown>;
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};
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export function useTimeline(
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timeline: Accessor<Timeline>,
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cfg?: {
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/**
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* Use full refresh mode. This mode ignores paging, it will refetch the specified number
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* of toots at every refetch().
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*/
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fullRefresh?: number;
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},
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) {
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let otl: Timeline | undefined;
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let npager: mastodon.Paginator<mastodon.v1.Status[], unknown> | undefined;
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let opager: mastodon.Paginator<mastodon.v1.Status[], unknown> | undefined;
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const [snapshot, { refetch }] = createResource<
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{
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records: mastodon.v1.Status[];
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direction: "new" | "old" | "items";
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tlChanged: boolean;
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},
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[Timeline],
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TimelineFetchTips | undefined
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>(
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() => [timeline()] as const,
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async ([tl], info) => {
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let tlChanged = false;
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if (otl !== tl) {
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npager = opager = undefined;
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otl = tl;
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tlChanged = true;
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}
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const fullRefresh = cfg?.fullRefresh;
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if (typeof fullRefresh !== "undefined") {
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const records = await tl
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.list({
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limit: fullRefresh,
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})
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.next();
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return {
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direction: "items",
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records: records.value ?? [],
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end: records.done,
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tlChanged,
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};
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}
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const direction =
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typeof info.refetching !== "boolean"
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? (info.refetching?.direction ?? "old")
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: "old";
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if (direction === "old") {
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if (!opager) {
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opager = tl.list({}).setDirection("next");
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}
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const next = await opager.next();
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return {
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direction,
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records: next.value ?? [],
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end: next.done,
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tlChanged,
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};
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} else {
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if (!npager) {
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npager = tl.list({}).setDirection("prev");
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}
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const next = await npager.next();
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const page = next.value ?? [];
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return { direction, records: page, end: next.done, tlChanged };
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}
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},
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);
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const [store, setStore] = createStore([] as mastodon.v1.Status[]);
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createEffect(() => {
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const shot = snapshot();
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if (!shot) return;
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const { direction, records, tlChanged } = shot;
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if (tlChanged) {
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setStore(() => []);
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}
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if (direction === "new") {
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setStore((x) => [...records, ...x]);
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} else if (direction === "old") {
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setStore((x) => [...x, ...records]);
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} else if (direction === "items") {
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setStore(() => records);
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}
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});
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return [
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store,
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snapshot,
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{
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refetch,
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mutate: setStore,
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},
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] as const;
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}
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export function createTimelineSnapshot(
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timeline: Accessor<Timeline>,
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limit: Accessor<number>,
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@ -176,30 +81,13 @@ export function createTimelineSnapshot(
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export type TimelineFetchDirection = mastodon.Direction;
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export type TimelineChunk = {
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pager: mastodon.Paginator<mastodon.v1.Status[], unknown>;
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tl: Timeline;
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chunk: readonly mastodon.v1.Status[];
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done?: boolean;
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direction: TimelineFetchDirection;
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limit: number;
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};
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function checkOrCreatePager(
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timeline: Timeline,
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limit: number,
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lastPager: TimelineChunk["pager"] | undefined,
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newDirection: TimelineFetchDirection,
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) {
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if (!lastPager) {
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return timeline.list({}).setDirection(newDirection);
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} else {
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let pager = lastPager;
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if (pager.getDirection() !== newDirection) {
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pager = pager.setDirection(newDirection);
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}
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return pager;
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}
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}
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type TreeNode<T> = {
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parent?: TreeNode<T>;
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value: T;
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@ -226,6 +114,38 @@ export function createTimeline(
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const lookup = new ReactiveMap<string, TreeNode<mastodon.v1.Status>>();
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const [threads, setThreads] = createStore([] as mastodon.v1.Status["id"][]);
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let vpMaxId: string | undefined, vpMinId: string | undefined;
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const fetchExtendingPage = async (
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tl: Timeline,
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direction: TimelineFetchDirection,
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limit: number,
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) => {
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switch (direction) {
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case "next": {
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const page = await tl
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.list({ limit, sinceId: vpMaxId })
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.setDirection(direction)
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.next();
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if ((page.value?.length ?? 0) > 0) {
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vpMaxId = page.value![0].id;
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}
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return page;
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}
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case "prev": {
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const page = await tl
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.list({ limit, maxId: vpMinId })
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.setDirection(direction)
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.next();
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if ((page.value?.length ?? 0) > 0) {
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vpMinId = page.value![page.value!.length - 1].id;
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}
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return page;
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}
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}
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};
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const [chunk, { refetch }] = createResource(
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() => [timeline(), limit()] as const,
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async (
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@ -237,17 +157,16 @@ export function createTimeline(
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) => {
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const direction =
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typeof info.refetching === "boolean" ? "prev" : info.refetching;
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const rebuildTimeline = limit !== info.value?.limit;
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const pager = rebuildTimeline
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? checkOrCreatePager(tl, limit, undefined, direction)
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: checkOrCreatePager(tl, limit, info.value?.pager, direction);
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const rebuildTimeline = tl !== info.value?.tl;
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if (rebuildTimeline) {
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vpMaxId = undefined;
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vpMinId = undefined;
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lookup.clear();
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setThreads([]);
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}
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const posts = await pager.next();
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const posts = await fetchExtendingPage(tl, direction, limit);
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return {
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pager,
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tl,
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chunk: posts.value ?? [],
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done: posts.done,
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direction,
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@ -262,17 +181,17 @@ export function createTimeline(
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return;
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}
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console.debug("fetched chunk", chk);
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const existence = [] as boolean[];
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batch(() => {
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for (const status of chk.chunk) {
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for (const [idx, status] of chk.chunk.entries()) {
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existence[idx] = !!untrack(() => lookup.get(status.id));
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lookup.set(status.id, {
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value: status,
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});
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}
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for (const status of chk.chunk) {
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const node = lookup.get(status.id)!;
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const node = untrack(() => lookup.get(status.id))!;
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if (status.inReplyToId) {
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const parent = lookup.get(status.inReplyToId);
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if (parent) {
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@ -285,10 +204,16 @@ export function createTimeline(
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}
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}
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}
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if (chk.direction === "next") {
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setThreads((threads) => [...threads, ...chk.chunk.map((x) => x.id)]);
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} else if (chk.direction === "prev") {
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setThreads((threads) => [...chk.chunk.map((x) => x.id), ...threads]);
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const nThreadIds = chk.chunk
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.filter((x, i) => !existence[i])
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.map((x) => x.id);
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batch(() => {
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if (chk.direction === "prev") {
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setThreads((threads) => [...threads, ...nThreadIds]);
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} else if (chk.direction === "next") {
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setThreads((threads) => [...nThreadIds, ...threads]);
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}
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setThreads((threads) =>
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@ -21,7 +21,6 @@ const TimelinePanel: Component<{
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client: mastodon.rest.Client;
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name: "home" | "public";
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prefetch?: boolean;
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fullRefetch?: number;
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openFullScreenToot: (
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toot: mastodon.v1.Status,
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@ -91,7 +90,7 @@ const TimelinePanel: Component<{
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<PullDownToRefresh
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linkedElement={scrollLinked()}
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loading={snapshot.loading}
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onRefresh={() => refetchTimeline("prev")}
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onRefresh={() => refetchTimeline("next")}
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/>
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<div
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ref={(e) =>
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@ -121,8 +120,7 @@ const TimelinePanel: Component<{
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toots={toots}
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onBoost={onBoost}
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onBookmark={onBookmark}
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onReply={
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({ status }, element) =>
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onReply={({ status }, element) =>
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props.openFullScreenToot(status, element, true)
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}
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client={props.client}
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@ -173,10 +171,10 @@ const TimelinePanel: Component<{
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Retry
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</Button>
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</Match>
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<Match when={typeof props.fullRefetch === "undefined"}>
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<Match when={true}>
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<Button
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variant="contained"
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onClick={[refetchTimeline, "next"]}
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onClick={[refetchTimeline, "prev"]}
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disabled={snapshot.loading}
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>
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Load More
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