// Copyright (c) 2020 Tulir Asokan // // This Source Code Form is subject to the terms of the Mozilla Public // License, v. 2.0. If a copy of the MPL was not distributed with this // file, You can obtain one at http://mozilla.org/MPL/2.0/. import { html, render, Component } from "https://unpkg.com/htm/preact/index.mjs?module" import { Spinner } from "./spinner.js" import * as widgetAPI from "./widget-api.js" import * as frequent from "./frequently-used.js" // The base URL for fetching packs. The app will first fetch ${PACK_BASE_URL}/index.json, // then ${PACK_BASE_URL}/${packFile} for each packFile in the packs object of the index.json file. const PACKS_BASE_URL = "packs" // This is updated from packs/index.json let HOMESERVER_URL = "https://matrix-client.matrix.org" const makeThumbnailURL = mxc => `${HOMESERVER_URL}/_matrix/media/r0/thumbnail/${mxc.substr(6)}?height=128&width=128&method=scale` // We need to detect iOS webkit because it has a bug related to scrolling non-fixed divs // This is also used to fix scrolling to sections on Element iOS const isMobileSafari = navigator.userAgent.match(/(iPod|iPhone|iPad)/) && navigator.userAgent.match(/AppleWebKit/) class App extends Component { constructor(props) { super(props) this.state = { packs: [], loading: true, error: null, frequentlyUsed: { id: "frequently-used", title: "Frequently used", stickerIDs: frequent.get(), stickers: [], }, } this.stickersByID = new Map(JSON.parse(localStorage.mauFrequentlyUsedStickerCache || "[]")) this.state.frequentlyUsed.stickers = this._getStickersByID(this.state.frequentlyUsed.stickerIDs) this.imageObserver = null this.packListRef = null this.navRef = null this.sendSticker = this.sendSticker.bind(this) this.navScroll = this.navScroll.bind(this) } _getStickersByID(ids) { return ids.map(id => this.stickersByID.get(id)).filter(sticker => !!sticker) } updateFrequentlyUsed() { const stickerIDs = frequent.get() const stickers = this._getStickersByID(stickerIDs) this.setState({ frequentlyUsed: { ...this.state.frequentlyUsed, stickerIDs, stickers } }) localStorage.mauFrequentlyUsedStickerCache = JSON.stringify(stickers.map(sticker => [sticker.id, sticker])) } componentDidMount() { fetch(`${PACKS_BASE_URL}/index.json`).then(async indexRes => { if (indexRes.status >= 400) { this.setState({ loading: false, error: indexRes.status !== 404 ? indexRes.statusText : null, }) return } const indexData = await indexRes.json() HOMESERVER_URL = indexData.homeserver_url || HOMESERVER_URL // TODO only load pack metadata when scrolled into view? for (const packFile of indexData.packs) { const packRes = await fetch(`${PACKS_BASE_URL}/${packFile}`) const packData = await packRes.json() for (const sticker of packData.stickers) { this.stickersByID.set(sticker.id, sticker) } this.setState({ packs: [...this.state.packs, packData], loading: false, }) } this.updateFrequentlyUsed() }, error => this.setState({ loading: false, error })) this.imageObserver = new IntersectionObserver(this.observeImageIntersections, { rootMargin: "100px", }) this.sectionObserver = new IntersectionObserver(this.observeSectionIntersections) } observeImageIntersections(intersections) { for (const entry of intersections) { const img = entry.target.children.item(0) if (entry.isIntersecting) { img.setAttribute("src", img.getAttribute("data-src")) img.classList.add("visible") } else { img.removeAttribute("src") img.classList.remove("visible") } } } observeSectionIntersections(intersections) { for (const entry of intersections) { const packID = entry.target.getAttribute("data-pack-id") const navElement = document.getElementById(`nav-${packID}`) if (entry.isIntersecting) { navElement.classList.add("visible") } else { navElement.classList.remove("visible") } } } componentDidUpdate() { for (const elem of this.packListRef.getElementsByClassName("sticker")) { this.imageObserver.observe(elem) } for (const elem of this.packListRef.children) { this.sectionObserver.observe(elem) } } componentWillUnmount() { this.imageObserver.disconnect() this.sectionObserver.disconnect() } sendSticker(evt) { const id = evt.currentTarget.getAttribute("data-sticker-id") const sticker = this.stickersByID.get(id) frequent.add(id) this.updateFrequentlyUsed() widgetAPI.sendSticker(sticker) } navScroll(evt) { this.navRef.scrollLeft += evt.deltaY * 12 } render() { if (this.state.loading) { return html`
<${Spinner} size=${80} green />
` } else if (this.state.error) { return html`

Failed to load packs

${this.state.error}

` } else if (this.state.packs.length === 0) { return html`

No packs found 😿

` } return html`
this.packListRef = elem}> <${Pack} pack=${this.state.frequentlyUsed} send=${this.sendSticker} /> ${this.state.packs.map(pack => html`<${Pack} id=${pack.id} pack=${pack} send=${this.sendSticker} />`)}
` } } // By default we just let the browser handle scrolling to sections, but webviews on Element iOS // open the link in the browser instead of just scrolling there, so we need to scroll manually: const scrollToSection = (evt, id) => { const pack = document.getElementById(`pack-${id}`) pack.scrollIntoView({ block: "start", behavior: "instant" }) evt.preventDefault() } const NavBarItem = ({ pack, iconOverride = null, altOverride = null }) => html` scrollToSection(evt, pack.id)) : undefined}>
${iconOverride ? html` ${altOverride} ` : html` ${pack.stickers[0].body} `}
` const Pack = ({ pack, send }) => html`

${pack.title}

${pack.stickers.map(sticker => html` <${Sticker} key=${sticker.id} content=${sticker} send=${send}/> `)}
` const Sticker = ({ content, send }) => html`
${content.body}
` render(html`<${App} />`, document.body)