Initial commit

.gitignore

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+node_modules

index.js

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+"use strict";
+
+const Promise = require("bluebird");
+const express = require("express");
+const expressPromiseRouter = require("express-promise-router");
+const expressReactViews = require("@joepie91/express-react-views");
+const path = require("path");
+const url = require("url");
+const autodiscoverClientConfiguration = require("@modular-matrix/autodiscover-client-configuration");
+const bhttp = require("bhttp");
+const createError = require("create-error");
+
+let UpstreamError = createError("UpstreamError");
+
+function generateSince(hostname, token) {
+	return url.format({ pathname: "/show-rooms", query: {
+		hostname: hostname,
+		since: token
+	} });
+}
+
+let app = express();
+
+app.set("views", path.join(__dirname, "views"));
+app.set("view engine", "jsx");
+app.engine("jsx", expressReactViews.createEngine());
+
+app.use(express.static(path.join(__dirname, "public")));
+
+let router = expressPromiseRouter();
+
+router.get("/", (req, res) => {
+	res.render("index");
+});
+
+router.get("/show-rooms", (req, res) => {
+	return Promise.try(() => {
+		return autodiscoverClientConfiguration.discover(req.query.hostname);
+	}).then((clientConfiguration) => {
+		let roomsUrl = url.format({
+			... url.parse(clientConfiguration.homeserver),
+			pathname: "/_matrix/client/r0/publicRooms",
+			query: { since: req.query.since }
+		});
+
+		return Promise.try(() => {
+			return bhttp.get(roomsUrl);
+		}).then((response) => {
+			if (response.statusCode === 200) {
+				console.log(response.body);
+				// next_batch
+				res.render("rooms", {
+					rooms: response.body.chunk,
+					nextBatchUrl: (response.body.next_batch != null)
+						? generateSince(req.query.hostname, response.body.next_batch)
+						: null,
+					previousBatchUrl: (response.body.previous_batch != null)
+						? generateSince(req.query.hostname, response.body.previous_batch)
+						: null,
+				});
+			} else {
+				throw new UpstreamError(`Non-200 status code received from homeserver: ${response.statusCode}`);
+			}
+		});
+	});
+});
+
+app.use(router);
+
+app.use((error, req, res, next) => {
+	if (error instanceof UpstreamError || error instanceof autodiscoverClientConfiguration.LookupFailed) {
+		res.render("error", { error: error });
+	} else {
+		throw error;
+	}
+});
+
+app.listen(3000);

package.json

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+{
+  "name": "matrix-room-list-viewer",
+  "description": "A simple tool for viewing the list of public rooms on a given Matrix server",
+  "version": "1.0.0",
+  "main": "index.js",
+  "repository": "git@git.cryto.net:joepie91/matrix-room-list-viewer.git",
+  "author": "Sven Slootweg <admin@cryto.net>",
+  "license": "WTFPL OR CC0-1.0",
+  "dependencies": {
+    "@joepie91/express-react-views": "^1.0.1",
+    "@modular-matrix/autodiscover-client-configuration": "^1.0.0",
+    "bhttp": "^1.2.4",
+    "bluebird": "^3.5.5",
+    "create-error": "^0.3.1",
+    "express": "^4.17.1",
+    "express-promise-router": "^3.0.3",
+    "react": "^16.9.0",
+    "react-dom": "^16.9.0"
+  },
+  "devDependencies": {
+    "nodemon": "^1.19.1"
+  }
+}

public/style.css

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+body {
+	font-family: sans-serif;
+}
+
+.container {
+	max-width: 960px;
+	margin: 0 auto;
+}
+
+.room {
+	margin: 1em 0;
+}
+
+.room .name, .room .alias, .room .userCount {
+	display: inline-block;
+	margin-right: 1em;
+}
+
+.room .name {
+	font-weight: bold;
+}
+
+.room .alias {
+	color: rgb(58, 58, 58);
+}

views/error.jsx

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+"use strict";
+
+const React = require("react");
+
+const Layout = require("./layout");
+
+module.exports = function Error({ error }) {
+	return (
+		<Layout>
+			{error.message}
+		</Layout>
+	);
+};

views/index.jsx

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+"use strict";
+
+const React = require("react");
+
+const Layout = require("./layout");
+
+function Field({ id, type, name, label, children }) {
+	return (
+		<div className="formField">
+			<label htmlFor={`field_${id}`}>{label}</label>&nbsp;
+			<input type={type} name={name} id={`field_${id}`} />
+		</div>
+	);
+}
+
+module.exports = function Index() {
+	return (
+		<Layout>
+			<form method="get" action="/show-rooms">
+				<Field label="Homeserver" type="text" name="hostname" id="homeserver" />
+				<button type="submit">Show rooms</button>
+			</form>
+		</Layout>
+	);
+};

views/layout.jsx

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+"use strict";
+
+const React = require("react");
+
+module.exports = function Layout({ children }) {
+	return (
+		<html lang="en">
+		<head>
+			<meta charSet="UTF-8"/>
+			<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+			<meta httpEquiv="X-UA-Compatible" content="ie=edge"/>
+			<link rel="stylesheet" href="/style.css"/>
+			<title>Matrix Room List Viewer</title>
+		</head>
+		<body>
+			<div className="container">
+				<h1>Matrix Room List Viewer</h1>
+				<hr/>
+				{children}
+			</div>
+		</body>
+		</html>
+	);
+};

views/rooms.jsx

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+"use strict";
+
+const React = require("react");
+
+const Layout = require("./layout");
+
+function Room({ room }) {
+	return (
+		<div className="room">
+			<div className="name">{room.name}</div>
+			<div className="userCount">{room.num_joined_members} users</div>
+			<div className="alias">{room.canonical_alias}</div>
+			<div className="topic">{room.topic}</div>
+		</div>
+	);
+}
+
+module.exports = function Rooms({ rooms, nextBatchUrl, previousBatchUrl }) {
+	return (
+		<Layout>
+			<div className="navigation">
+				{(previousBatchUrl != null)
+					? <a href={previousBatchUrl}>&lt;&lt; Previous</a>
+					: null
+				}
+				{(previousBatchUrl != null && nextBatchUrl != null)
+					? " | "
+					: null
+				}
+				{(nextBatchUrl != null)
+					? <a href={nextBatchUrl}>Next &gt;&gt;</a>
+					: null
+				}
+			</div>
+			{rooms.map((room) => {
+				return <Room key={room.id} room={room} />;
+			})}
+		</Layout>
+	);
+};