// 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" // 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.observer = null } observeIntersection = 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") } } } 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}/${packFile}`) const packData = await packRes.json() this.setState({ packs: [...this.state.packs, packData], loading: false, }) } }, error => this.setState({ loading: false, error })) this.observer = new IntersectionObserver(this.observeIntersection, { rootMargin: "100px", threshold: 0, }) } componentDidUpdate() { for (const elem of document.getElementsByClassName("sticker")) { this.observer.observe(elem) } } componentWillUnmount() { this.observer.disconnect() } render() { if (this.state.loading) { return html`
<${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`
${this.state.packs.map(pack => html`<${Pack} id=${pack.id} ...${pack}/>`)}
` } } const Spinner = ({ size = 40, noCenter = false, noMargin = false, green = false }) => { let margin = 0 if (!isNaN(+size)) { size = +size margin = noMargin ? 0 : `${Math.round(size / 6)}px` size = `${size}px` } const noInnerMargin = !noCenter || !margin const comp = html`
` if (!noCenter) { return html`
${comp}
` } return comp } const Pack = ({ title, stickers }) => html`

${title}

${stickers.map(sticker => html` <${Sticker} key=${sticker["net.maunium.telegram.sticker"].id} content=${sticker}/> `)}
` const Sticker = ({ content }) => html`
sendSticker(content)}> ${content.body}
` function sendSticker(content) { window.parent.postMessage({ api: "fromWidget", action: "m.sticker", requestId: `sticker-${Date.now()}`, widgetId, data: { name: content.body, content, }, }, "*") } let widgetId = null window.onmessage = event => { if (!window.parent || !event.data) { return } const request = event.data if (!request.requestId || !request.widgetId || !request.action || request.api !== "toWidget") { return } if (widgetId) { if (widgetId !== request.widgetId) { return } } else { widgetId = request.widgetId } window.parent.postMessage({ ...request, response: request.action === "capabilities" ? { capabilities: ["m.sticker"], } : { error: { message: "Action not supported" }, }, }, event.origin) } render(html`<${App} />`, document.body)