// 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 { sendSticker } from "./widget-api.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` class App extends Component { constructor(props) { super(props) this.state = { packs: [], loading: true, error: null, } this.imageObserver = null this.packListRef = null } 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}/${packFile}`) const packData = await packRes.json() this.setState({ packs: [...this.state.packs, packData], loading: false, }) } }, error => this.setState({ loading: false, error })) this.imageObserver = new IntersectionObserver(this.observeImageIntersection, { rootMargin: "100px", }) this.sectionObserver = new IntersectionObserver(this.observeSectionIntersection, {}) } observeImageIntersection = intersections => { for (const entry of intersections) { const img = entry.target.children.item(0) if (entry.isIntersecting) { img.setAttribute("src", img.getAttribute("data-src")) img.classList.add("visible") } else { img.removeAttribute("src") img.classList.remove("visible") } } } observeSectionIntersection = intersections => { for (const entry of intersections) { const packID = entry.target.getAttribute("data-pack-id") const navElement = document.getElementById(`nav-${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() } 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}> ${this.state.packs.map(pack => html`<${Pack} id=${pack.id} pack=${pack}/>`)}
` } } const NavBarItem = ({ pack }) => html`
${pack.stickers[0].body}
` const Pack = ({ pack }) => html`

${pack.title}

${pack.stickers.map(sticker => html` <${Sticker} key=${sticker["net.maunium.telegram.sticker"].id} content=${sticker}/> `)}
` const Sticker = ({ content }) => html`
sendSticker(content)}> ${content.body}
` render(html`<${App} />`, document.body)