import { useEffect, useRef, useState } from 'preact/hooks'; import { useHotkeys } from 'react-hotkeys-hook'; import { useDebouncedCallback } from 'use-debounce'; import useScroll from '../utils/useScroll'; import Icon from './icon'; import Link from './link'; import Loader from './loader'; import Status from './status'; function Timeline({ title, titleComponent, id, instance, emptyText, errorText, useItemID, // use statusID instead of status object, assuming it's already in states boostsCarousel, fetchItems = () => {}, }) { const [items, setItems] = useState([]); const [uiState, setUIState] = useState('default'); const [showMore, setShowMore] = useState(false); const scrollableRef = useRef(); const loadItems = useDebouncedCallback( (firstLoad) => { if (uiState === 'loading') return; setUIState('loading'); (async () => { try { let { done, value } = await fetchItems(firstLoad); if (value?.length) { if (boostsCarousel) { value = groupBoosts(value); } console.log(value); if (firstLoad) { setItems(value); } else { setItems([...items, ...value]); } setShowMore(!done); } else { setShowMore(false); } setUIState('default'); } catch (e) { console.error(e); setUIState('error'); } })(); }, 1500, { leading: true, trailing: false, }, ); const itemsSelector = '.timeline-item, .timeline-item-alt'; const jRef = useHotkeys('j, shift+j', (_, handler) => { // focus on next status after active item const activeItem = document.activeElement.closest(itemsSelector); const activeItemRect = activeItem?.getBoundingClientRect(); const allItems = Array.from( scrollableRef.current.querySelectorAll(itemsSelector), ); if ( activeItem && activeItemRect.top < scrollableRef.current.clientHeight && activeItemRect.bottom > 0 ) { const activeItemIndex = allItems.indexOf(activeItem); let nextItem = allItems[activeItemIndex + 1]; if (handler.shift) { // get next status that's not .timeline-item-alt nextItem = allItems.find( (item, index) => index > activeItemIndex && !item.classList.contains('timeline-item-alt'), ); } if (nextItem) { nextItem.focus(); nextItem.scrollIntoViewIfNeeded?.(); } } else { // If active status is not in viewport, get the topmost status-link in viewport const topmostItem = allItems.find((item) => { const itemRect = item.getBoundingClientRect(); return itemRect.top >= 44 && itemRect.left >= 0; // 44 is the magic number for header height, not real }); if (topmostItem) { topmostItem.focus(); topmostItem.scrollIntoViewIfNeeded?.(); } } }); const kRef = useHotkeys('k, shift+k', (_, handler) => { // focus on previous status after active item const activeItem = document.activeElement.closest(itemsSelector); const activeItemRect = activeItem?.getBoundingClientRect(); const allItems = Array.from( scrollableRef.current.querySelectorAll(itemsSelector), ); if ( activeItem && activeItemRect.top < scrollableRef.current.clientHeight && activeItemRect.bottom > 0 ) { const activeItemIndex = allItems.indexOf(activeItem); let prevItem = allItems[activeItemIndex - 1]; if (handler.shift) { // get prev status that's not .timeline-item-alt prevItem = allItems.findLast( (item, index) => index < activeItemIndex && !item.classList.contains('timeline-item-alt'), ); } if (prevItem) { prevItem.focus(); prevItem.scrollIntoViewIfNeeded?.(); } } else { // If active status is not in viewport, get the topmost status-link in viewport const topmostItem = allItems.find((item) => { const itemRect = item.getBoundingClientRect(); return itemRect.top >= 44 && itemRect.left >= 0; // 44 is the magic number for header height, not real }); if (topmostItem) { topmostItem.focus(); topmostItem.scrollIntoViewIfNeeded?.(); } } }); const oRef = useHotkeys(['enter', 'o'], () => { // open active status const activeItem = document.activeElement.closest(itemsSelector); if (activeItem) { activeItem.click(); } }); const { nearReachEnd, reachStart, reachEnd } = useScroll({ scrollableElement: scrollableRef.current, distanceFromEnd: 1, }); useEffect(() => { scrollableRef.current?.scrollTo({ top: 0 }); loadItems(true); }, []); useEffect(() => { if (reachStart) { loadItems(true); } }, [reachStart]); useEffect(() => { if (nearReachEnd || (reachEnd && showMore)) { loadItems(); } }, [nearReachEnd, showMore]); return (
{ scrollableRef.current = node; jRef.current = node; kRef.current = node; oRef.current = node; }} tabIndex="-1" >
{ if (e.target === e.currentTarget) { scrollableRef.current?.scrollTo({ top: 0, behavior: 'smooth', }); } }} >
{title && (titleComponent ? titleComponent :

{title}

)}
{!!items.length ? ( <> {uiState === 'default' && (showMore ? ( ) : (

The end.

))} ) : uiState === 'loading' ? ( ) : ( uiState !== 'error' &&

{emptyText}

)} {uiState === 'error' && (

{errorText}

)}
); } function groupBoosts(values) { let newValues = []; let boostStash = []; let serialBoosts = 0; for (let i = 0; i < values.length; i++) { const item = values[i]; if (item.reblog) { boostStash.push(item); serialBoosts++; } else { newValues.push(item); if (serialBoosts < 3) { serialBoosts = 0; } } } // if boostStash is more than quarter of values // or if there are 3 or more boosts in a row if (boostStash.length > values.length / 4 || serialBoosts >= 3) { // if boostStash is more than 3 quarter of values const boostStashID = boostStash.map((status) => status.id); if (boostStash.length > (values.length * 3) / 4) { // insert boost array at the end of specialHome list newValues = [...newValues, { id: boostStashID, boosts: boostStash }]; } else { // insert boosts array in the middle of specialHome list const half = Math.floor(newValues.length / 2); newValues = [ ...newValues.slice(0, half), { id: boostStashID, boosts: boostStash, }, ...newValues.slice(half), ]; } return newValues; } else { return values; } } function BoostsCarousel({ boosts, useItemID, instance }) { const carouselRef = useRef(); const { reachStart, reachEnd, init } = useScroll({ scrollableElement: carouselRef.current, direction: 'horizontal', }); useEffect(() => { init?.(); }, []); return ( ); } export default Timeline;