126 lines
4.1 KiB
JavaScript
126 lines
4.1 KiB
JavaScript
// If you want to use Phoenix channels, run `mix help phx.gen.channel`
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// to get started and then uncomment the line below.
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// import "./user_socket.js"
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// You can include dependencies in two ways.
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//
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// The simplest option is to put them in assets/vendor and
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// import them using relative paths:
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//
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// import "../vendor/some-package.js"
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//
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// Alternatively, you can `npm install some-package --prefix assets` and import
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// them using a path starting with the package name:
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//
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// import "some-package"
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//
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// Include phoenix_html to handle method=PUT/DELETE in forms and buttons.
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import "phoenix_html"
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// Establish Phoenix Socket and LiveView configuration.
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import {Socket} from "phoenix"
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import {LiveSocket} from "phoenix_live_view"
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import topbar from "../vendor/topbar"
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let Hooks = {}
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// Renders a complete markdown string client-side on mount.
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// The raw markdown is passed as the data-md attribute.
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Hooks.MarkdownRender = {
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mounted() {
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const smd = window.smd
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const content = this.el.dataset.md
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if (!content) return
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const parser = smd.parser(smd.default_renderer(this.el))
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smd.parser_write(parser, content)
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smd.parser_end(parser)
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}
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}
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// Streams markdown chunks into the element using the streaming-markdown parser.
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// The server sends push_event(socket, eventName, %{chunk: "..."}) for each chunk.
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// data-event on the element controls which event this hook listens for.
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// The server sends push_event(socket, eventName, %{chunk: "..."}) for each chunk.
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// data-event on the element controls which event this hook listens for.
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Hooks.MarkdownStream = {
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mounted() {
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const smd = window.smd
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const DOMPurify = window.DOMPurify
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this._chunks = ""
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this._parser = smd.parser(smd.default_renderer(this.el))
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const eventName = this.el.dataset.event
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this.handleEvent(eventName, ({chunk}) => {
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this._chunks += chunk
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// Sanitize all accumulated chunks to detect injection attacks.
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DOMPurify.sanitize(this._chunks)
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if (DOMPurify.removed.length > 0) {
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// Insecure content detected — stop rendering immediately.
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smd.parser_end(this._parser)
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this._parser = null
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return
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}
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if (this._parser) smd.parser_write(this._parser, chunk)
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})
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},
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destroyed() {
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if (this._parser) {
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window.smd.parser_end(this._parser)
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this._parser = null
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}
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}
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}
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Hooks.ScrollBottom = {
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mounted() {
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requestAnimationFrame(() => this.scrollToBottom())
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this.observer = new MutationObserver(() => {
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if (this.isNearBottom()) this.scrollToBottom()
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})
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this.observer.observe(this.el, {childList: true, subtree: true})
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this.handleEvent("scroll_to_bottom", () => {
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this.scrollToBottom()
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})
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},
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updated() {
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if (this.isNearBottom()) this.scrollToBottom()
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},
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destroyed() {
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this.observer.disconnect()
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},
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isNearBottom() {
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const closeToBottomThreshold = 200
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return this.el.scrollHeight - this.el.scrollTop - this.el.clientHeight <= closeToBottomThreshold
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},
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scrollToBottom() {
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this.el.scrollTop = this.el.scrollHeight
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}
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}
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let csrfToken = document.querySelector("meta[name='csrf-token']").getAttribute("content")
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// Retry very aggressively: 100ms, 250ms, 500ms, then cap at 1s indefinitely.
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const reconnectAfterMs = (tries) => [100, 250, 500][tries - 1] || 1000
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const rejoinAfterMs = (tries) => [100, 250, 500][tries - 1] || 1000
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let liveSocket = new LiveSocket("/live", Socket, {
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params: {_csrf_token: csrfToken},
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hooks: Hooks,
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reconnectAfterMs,
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rejoinAfterMs
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})
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// Show progress bar on live navigation and form submits
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topbar.config({barColors: {0: "#29d"}, shadowColor: "rgba(0, 0, 0, .3)"})
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window.addEventListener("phx:page-loading-start", _info => topbar.show(300))
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window.addEventListener("phx:page-loading-stop", _info => topbar.hide())
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// connect if there are any LiveViews on the page
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liveSocket.connect()
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// expose liveSocket on window for web console debug logs and latency simulation:
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// >> liveSocket.enableDebug()
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// >> liveSocket.enableLatencySim(1000) // enabled for duration of browser session
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// >> liveSocket.disableLatencySim()
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window.liveSocket = liveSocket
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