feat(mux): Add Mux Video example (#441)

Co-authored-by: Mehdi Achour <machour@gmail.com>

mux-video/.env.example

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+MUX_TOKEN_ID=
+MUX_TOKEN_SECRET=

mux-video/.eslintrc.cjs

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+/**
+ * This is intended to be a basic starting point for linting in your app.
+ * It relies on recommended configs out of the box for simplicity, but you can
+ * and should modify this configuration to best suit your team's needs.
+ */
+
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  root: true,
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+  env: {
+    browser: true,
+    commonjs: true,
+    es6: true,
+  },
+  ignorePatterns: ["!**/.server", "!**/.client"],
+
+  // Base config
+  extends: ["eslint:recommended"],
+
+  overrides: [
+    // React
+    {
+      files: ["**/*.{js,jsx,ts,tsx}"],
+      plugins: ["react", "jsx-a11y"],
+      extends: [
+        "plugin:react/recommended",
+        "plugin:react/jsx-runtime",
+        "plugin:react-hooks/recommended",
+        "plugin:jsx-a11y/recommended",
+      ],
+      settings: {
+        react: {
+          version: "detect",
+        },
+        formComponents: ["Form"],
+        linkComponents: [
+          { name: "Link", linkAttribute: "to" },
+          { name: "NavLink", linkAttribute: "to" },
+        ],
+        "import/resolver": {
+          typescript: {},
+        },
+      },
+    },
+
+    // Typescript
+    {
+      files: ["**/*.{ts,tsx}"],
+      plugins: ["@typescript-eslint", "import"],
+      parser: "@typescript-eslint/parser",
+      settings: {
+        "import/internal-regex": "^~/",
+        "import/resolver": {
+          node: {
+            extensions: [".ts", ".tsx"],
+          },
+          typescript: {
+            alwaysTryTypes: true,
+          },
+        },
+      },
+      extends: [
+        "plugin:@typescript-eslint/recommended",
+        "plugin:import/recommended",
+        "plugin:import/typescript",
+      ],
+    },
+
+    // Node
+    {
+      files: [".eslintrc.cjs"],
+      env: {
+        node: true,
+      },
+    },
+  ],
+};

mux-video/.gitignore

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+node_modules
+
+/.cache
+/build
+.env

mux-video/README.md

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+# Mux Video
+
+This example uses Mux Video, an API-first platform for video. The example features video uploading and playback in a Remix.js application.
+
+This example is useful if you want to build a platform that supports user-uploaded videos. For example:
+- Enabling user profile videos
+- Accepting videos for a video contest promotion
+- Allowing customers to upload screencasts that help with troubleshooting a bug
+- Or even the next Youtube, TikTok, or Instagram
+
+## Preview
+
+Open this example on [CodeSandbox](https://codesandbox.com):
+
+[![Open in CodeSandbox](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/github/remix-run/examples/tree/main/mux-video)
+
+## How to use
+
+### Step 1. Create a Remix app with this example
+
+```bash
+npx create-remix@latest --template remix-run/examples/mux-video
+```
+
+### Step 2. Create an account in Mux
+
+All you need to run this example is a [Mux account](https://www.mux.com?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples).
+
+Before entering a credit card on your Mux account, all videos are in “test mode” which means they are watermarked and clipped to 10 seconds.
+
+### Step 3. Set up environment variables
+
+Copy the `.env.example` file in this directory to `.env` (which will be ignored by Git):
+
+```bash
+cp .env.example .env
+```
+
+Then, go to the [settings page](https://dashboard.mux.com/settings/access-tokens) in your Mux dashboard, get a new **API Access Token** with "Mux Video Read" and "Mux Video Write" permissions. Use that token to set the variables in `.env.local`:
+
+- `MUX_TOKEN_ID` should be the `TOKEN ID` of your new token
+- `MUX_TOKEN_SECRET` should be `TOKEN SECRET`
+
+At this point, you're good to `npm run dev`.
+
+## How it works
+
+Uploading and viewing a video takes four steps:
+
+1. **Upload a video**: Use the Mux [Direct Uploads API](https://docs.mux.com/api-reference#video/tag/direct-uploads?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples) to create an endpoint for [Mux Uploader React](https://docs.mux.com/guides/mux-uploader?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples). The user can then use Mux Uploader to upload a video.
+1. **Exchange the `upload.id` for an `asset.id`**: Once the upload is complete, it will have a Mux asset associated with it. We can use the [Direct Uploads API](https://docs.mux.com/api-reference#video/tag/direct-uploads?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples) to check for that asset.
+1. **Use the `asset.id` to check if the asset is ready** by polling the [Asset API](https://docs.mux.com/api-reference#video/tag/assets?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples)
+1. **Play back the video with [Mux Player React](https://docs.mux.com/guides/mux-player-web?utm_source=remix-examples&utm_medium=mux-video&utm_campaign=remix-examples)** (on a page that uses the [Mux Image API](https://docs.mux.com/guides/get-images-from-a-video) to provide og images)
+
+These steps correspond to the following routes:
+
+1. [`_index.tsx`](app/routes/_index.tsx) creates the upload in a loader, and exchanges the `upload.id` for an `asset.id` in an action which redirects to...
+2. [`status.$assetId.tsx`](app/routes/status.$assetId.tsx) polls the Mux API to see if the asset is ready. When it is, we redirect to...
+3. [`playback.$playbackId.tsx`](app/routes/playback.$playbackId.tsx) plays the video.
+
+## Preparing for Production
+
+### Set the cors_origin
+
+When creating uploads, this demo sets `cors_origin: "*"` in the [`app/routes/_index.tsx`](app/routes/_index.tsx) file. For extra security, you should update this value to be something like `cors_origin: 'https://your-app.com'`, to restrict uploads to only be allowed from your application.
+
+### Consider webhooks
+
+In this example, we poll the Mux API to see if our asset is ready.  In production, you'll likely have a database where you can store the `upload.id` and `asset.id`, and you can use [Mux Webhooks](https://docs.mux.com/guides/listen-for-webhooks) to get notified when your upload is complete, and when your asset is ready.
+In this example, we poll the Mux API to see if our asset is ready. In production, you'll likely have a database where you can store the `upload.id` and `asset.id`, and you can use [Mux Webhooks](https://docs.mux.com/guides/listen-for-webhooks) to get notified when your upload is complete, and when your asset is ready.
+

mux-video/app/lib/mux.server.ts

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+import Mux from "@mux/mux-node";
+
+const mux = new Mux();
+
+export default mux;

mux-video/app/root.tsx

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+import {
+  Links,
+  Meta,
+  Outlet,
+  Scripts,
+  ScrollRestoration,
+} from "@remix-run/react";
+
+export function Layout({ children }: { children: React.ReactNode }) {
+  return (
+    <html lang="en">
+      <head>
+        <meta charSet="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1" />
+        <Meta />
+        <Links />
+      </head>
+      <body>
+        {children}
+        <ScrollRestoration />
+        <Scripts />
+      </body>
+    </html>
+  );
+}
+
+export default function App() {
+  return <Outlet />;
+}

mux-video/app/routes/_index.tsx

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+import MuxUploader from "@mux/mux-uploader-react";
+import { type ActionFunctionArgs, json, redirect } from "@remix-run/node";
+import { Form, useActionData, useLoaderData } from "@remix-run/react";
+import { useState } from "react";
+
+import mux from "~/lib/mux.server";
+
+export const loader = async () => {
+  // Create an endpoint for MuxUploader to upload to
+  const upload = await mux.video.uploads.create({
+    new_asset_settings: {
+      playback_policy: ["public"],
+      encoding_tier: "baseline",
+    },
+    // in production, you'll want to change this origin to your-domain.com
+    cors_origin: "*",
+  });
+  return json({ id: upload.id, url: upload.url });
+};
+
+export const action = async ({ request }: ActionFunctionArgs) => {
+  const formData = await request.formData();
+  const uploadId = formData.get("uploadId");
+  if (typeof uploadId !== "string") {
+    throw new Error("No uploadId found");
+  }
+
+  // when the upload is complete,
+  // the upload will have an assetId associated with it
+  // we'll use that assetId to view the video status
+  const upload = await mux.video.uploads.retrieve(uploadId);
+  if (upload.asset_id) {
+    return redirect(`/status/${upload.asset_id}`);
+  }
+
+  // while onSuccess is a strong indicator that Mux has received the file
+  // and created the asset, this isn't a guarantee.
+  // In production, you might write an api route
+  // to listen for the`video.upload.asset_created` webhook
+  // https://docs.mux.com/guides/listen-for-webhooks
+  // However, to keep things simple here,
+  // we'll just ask the user to push the button again.
+  // This should rarely happen.
+  return json({ message: "Upload has no asset yet. Try again." });
+};
+
+export default function UploadPage() {
+  const loaderData = useLoaderData<typeof loader>();
+  const actionData = useActionData<typeof action>();
+  const [isUploadSuccess, setIsUploadSuccess] = useState(false);
+
+  const { id, url } = loaderData;
+  const { message } = actionData ?? {};
+
+  return (
+    <Form method="post">
+      <MuxUploader endpoint={url} onSuccess={() => setIsUploadSuccess(true)} />
+      <input type="hidden" name="uploadId" value={id} />
+      {/* 
+        you might have other fields here, like name and description,
+        that you'll save in your CMS alongside the uploadId and assetId
+      */}
+      <button
+        type="submit"
+        disabled={!isUploadSuccess}
+      >
+        {isUploadSuccess ? "Watch video" : "Waiting for upload..."}
+      </button>
+      {message ? <p>{message}</p> : null}
+    </Form>
+  );
+}

mux-video/app/routes/mux.webhook.ts

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+import { json, type ActionFunctionArgs } from "@remix-run/node";
+
+import mux from "~/lib/mux.server";
+
+// while this isn't called anywhere in this example,
+// I thought it might be helpful to see what a mux webhook handler looks like.
+
+// Mux webhooks POST, so let's use an action
+export const action = async ({ request }: ActionFunctionArgs) => {
+  if (request.method !== "POST") {
+    return new Response("Method not allowed", { status: 405 });
+  }
+
+  const body = await request.text();
+  // mux.webhooks.unwrap will validate that the given payload was sent by Mux and parse the payload.
+  // It will also provide type-safe access to the payload.
+  // Generate MUX_WEBHOOK_SIGNING_SECRET in the Mux dashboard
+  // https://dashboard.mux.com/settings/webhooks
+  const event = mux.webhooks.unwrap(
+    body,
+    request.headers,
+    process.env.MUX_WEBHOOK_SIGNING_SECRET
+  );
+
+  // you can also unwrap the payload yourself:
+  // const event = await request.json();
+  switch (event.type) {
+    case "video.upload.asset_created":
+      // we might use this to know that an upload has been completed
+      // and we can save its assetId to our database
+      break;
+    case "video.asset.ready":
+      // we might use this to know that a video has been encoded
+      // and we can save its playbackId to our database
+      break;
+    // there are many more Mux webhook events
+    // check them out at https://docs.mux.com/webhook-reference
+    default:
+      break;
+  }
+
+  return json({ message: "ok" })
+};

mux-video/app/routes/playback.$playbackId.tsx

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+import MuxPlayer from "@mux/mux-player-react";
+import type { MetaFunction } from "@remix-run/node";
+import { useParams, Link } from "@remix-run/react";
+
+const title = "View this video created with Mux + Remix";
+const description =
+  "This video was uploaded and processed by Mux in an example Remix application.";
+export const meta: MetaFunction = ({ params }) => {
+  const { playbackId } = params;
+  return [
+    { name: "description", content: description },
+    { property: "og:type", content: "video" },
+    { property: "og:title", content: title },
+    { property: "og:description", content: description },
+    {
+      property: "og:image",
+      content: `https://image.mux.com/${playbackId}/thumbnail.png?width=1200&height=630&fit_mode=pad`,
+    },
+    { property: "og:image:width", content: "1200" },
+    { property: "og:image:height", content: "630" },
+    { property: "twitter:card", content: "summary_large_image" },
+    { property: "twitter:title", content: title },
+    { property: "twitter:description", content: description },
+    {
+      property: "twitter:image",
+      content: `https://image.mux.com/${playbackId}/thumbnail.png?width=1200&height=600&fit_mode=pad`,
+    },
+    { property: "twitter:image:width", content: "1200" },
+    { property: "twitter:image:height", content: "600" },
+    // These tags should be sufficient for social sharing.
+    // However, if you're really committed video SEO, I'd suggest adding ld+json, as well.
+    // https://developers.google.com/search/docs/appearance/structured-data/video
+  ];
+};
+
+export default function Page() {
+  const { playbackId } = useParams();
+  return (
+    <>
+      <p>
+        This video is ready for playback and sharing
+      </p>
+      <MuxPlayer
+        style={{ width: '100%', height: 'auto', aspectRatio: '16/9', marginBottom: '2rem' }}
+        playbackId={playbackId}
+        metadata={{ player_name: "remix/examples/mux-video" }}
+        accentColor="rgb(37 99 235)"
+      />
+      <p>
+        Go <Link to="/">back home</Link> to upload another video.
+      </p>
+    </>
+  );
+}