state: fix prefix() call in MODE handler

Lost during a refactoring.

Fixes: ab3d4dd661 ("Refactor ISUPPORT handling")

.build.yml

@@ -0,0 +1,19 @@
+image: alpine/latest
+packages:
+- npm
+- rsync
+sources:
+- https://git.sr.ht/~emersion/gamja
+secrets:
+- 5874ac5a-905e-4596-a117-fed1401c60ce # deploy SSH key
+tasks:
+- setup: |
+    cd gamja
+    npm install --include=dev
+    npm run build
+- deploy: |
+    cd gamja/dist
+    [ "$(git rev-parse HEAD)" = "$(git rev-parse origin/master)" ] || complete-build
+    rsync --rsh="ssh -o StrictHostKeyChecking=no" -rP \
+      --delete --exclude=config.json \
+      . deploy@emersion.fr:/srv/http/gamja

.gitignore

@@ -1,2 +1,5 @@
 node_modules
 /config.json
+
+.parcel-cache
+/dist

README.md

@@ -12,6 +12,9 @@ First install dependencies:
 
     npm install --production
 
+Then configure an HTTP server to serve the gamja files. Below are some
+server-specific instructions.
+
 ### [soju]
 
 Add a WebSocket listener to soju, e.g. `listen wss://127.0.0.1:8080`.
@@ -37,6 +40,10 @@ If you use nginx as a reverse HTTP proxy, make sure to bump the default read
 timeout to a value higher than the IRC server PING interval. Example:
 
 ```
+location / {
+	root /path/to/gamja;
+}
+
 location /socket {
 	proxy_pass http://127.0.0.1:8080;
 	proxy_read_timeout 600s;
@@ -48,19 +55,26 @@ location /socket {
 }
 ```
 
-If you are unable to configure the proxy timeout accordingly, you can set the
-`server.ping` option in `config.json` to an interval, in seconds, between which
-gamja will send opportunistic pings.
+If you are unable to configure the proxy timeout accordingly, or if your IRC
+server doesn't send PINGs, you can set the `server.ping` option in
+`config.json` (see below).
 
 ### Development server
 
-Start your IRC WebSocket server, e.g. on port 8080. Then run:
+If you don't have an IRC WebSocket server at hand, gamja's development server
+can be used. For instance, to run gamja on Libera Chat:
 
-    npm install
-    npm start
+    npm install --include=dev
+    npm start -- irc.libera.chat
 
-This will start a development HTTP server for gamja. Connect to it and append
-`?server=ws://localhost:8080` to the URL.
+See `npm start -- -h` for a list of options.
+
+### Production build
+
+Optionally, [Parcel] can be used to build a minified version of gamja.
+
+    npm install --include=dev
+    npm run build
 
 ## Query parameters
 
@@ -69,6 +83,8 @@ gamja settings can be overridden using URL query parameters:
 - `server`: path or URL to the WebSocket server
 - `nick`: nickname
 - `channels`: comma-separated list of channels to join (`#` needs to be escaped)
+- `open`: [IRC URL] to open
+- `debug`: if set to 1, debug mode is enabled
 
 Alternatively, the channels can be set with the URL fragment (ie, by just
 appending the channel name to the gamja URL).
@@ -87,9 +103,14 @@ gamja default settings can be set using a `config.json` file at the root:
 		"autojoin": "#gamja",
 		// Controls how the password UI is presented to the user. Set to
 		// "mandatory" to require a password, "optional" to accept one but not
-		// require it, and "disabled" to never ask for a password. Defaults to
-		// "optional".
+		// require it, "disabled" to never ask for a password, or "external" to
+		// use SASL EXTERNAL. Defaults to "optional".
 		"auth": "optional",
+		// Default nickname (string).
+		"nick": "asdf",
+		// Don't display the login UI, immediately connect to the server
+		// (boolean).
+		"autoconnect": true,
 		// Interval in seconds to send PING commands (number). Set to 0 to
 		// disable. Enabling PINGs can have an impact on client power usage and
 		// should only be enabled if necessary.
@@ -101,7 +122,7 @@ gamja default settings can be set using a `config.json` file at the root:
 ## Contributing
 
 Send patches on the [mailing list], report bugs on the [issue tracker]. Discuss
-in #soju on Libera Chat.
+in [#soju on Libera Chat].
 
 ## License
 
@@ -114,3 +135,6 @@ Copyright (C) 2020 The gamja Contributors
 [webircgateway]: https://github.com/kiwiirc/webircgateway
 [mailing list]: https://lists.sr.ht/~emersion/public-inbox
 [issue tracker]: https://todo.sr.ht/~emersion/gamja
+[Parcel]: https://parceljs.org
+[IRC URL]: https://datatracker.ietf.org/doc/html/draft-butcher-irc-url-04
+[#soju on Libera Chat]: ircs://irc.libera.chat/#soju

commands.js

@@ -93,6 +93,17 @@ function givemode(app, args, mode) {
 }
 
 export default {
+	"away": {
+		usage: "[message]",
+		description: "Set away message",
+		execute: (app, args) => {
+			const params = []
+			if (args.length) {
+				params.push(args.join(" "));
+			}
+			getActiveClient(app).send({command: "AWAY", params});
+		},
+	},
 	"ban": {
 		usage: "[nick]",
 		description: "Ban a user from the channel, or display the current ban list",
@@ -322,10 +333,11 @@ export default {
 		execute: (app, args) => {
 			let newRealname = args.join(" ");
 			let client = getActiveClient(app);
-			if (!client.enabledCaps["setname"]) {
+			if (!client.caps.enabled.has("setname")) {
 				throw new Error("Server doesn't support changing the realname");
 			}
 			client.send({ command: "SETNAME", params: [newRealname] });
+			// TODO: save to local storage
 		},
 	},
 	"stats": {
@@ -411,4 +423,12 @@ export default {
 			markServerBufferUnread(app);
 		},
 	},
+	"list": {
+		usage: "[filter]",
+		description: "Retrieve a list of channels from a network",
+		execute: (app, args) => {
+			getActiveClient(app).send({ command: "LIST", params: args });
+			markServerBufferUnread(app);
+		},
+	},
 };

components/auth-form.js

@@ -0,0 +1,51 @@
+import { html, Component } from "../lib/index.js";
+
+export default class NetworkForm extends Component {
+	state = {
+		username: "",
+		password: "",
+	};
+
+	constructor(props) {
+		super(props);
+
+		this.handleChange = this.handleChange.bind(this);
+		this.handleSubmit = this.handleSubmit.bind(this);
+
+		if (props.username) {
+			this.state.username = props.username;
+		}
+	}
+
+	handleChange(event) {
+		let target = event.target;
+		let value = target.type == "checkbox" ? target.checked : target.value;
+		this.setState({ [target.name]: value });
+	}
+
+	handleSubmit(event) {
+		event.preventDefault();
+
+		this.props.onSubmit(this.state.username, this.state.password);
+	}
+
+	render() {
+		return html`
+			<form onChange=${this.handleChange} onSubmit=${this.handleSubmit}>
+				<label>
+					Username:<br/>
+					<input type="username" name="username" value=${this.state.username} required/>
+				</label>
+				<br/><br/>
+
+				<label>
+					Password:<br/>
+					<input type="password" name="password" value=${this.state.password} required autofocus/>
+				</label>
+				<br/><br/>
+
+				<button>Login</button>
+			</form>
+		`;
+	}
+}

components/buffer-header.js

@@ -21,24 +21,12 @@ function NickStatus(props) {
 }
 
 export default function BufferHeader(props) {
-	function handleCloseClick(event) {
-		event.preventDefault();
-		props.onClose();
-	}
-	function handleJoinClick(event) {
-		event.preventDefault();
-		props.onJoin();
-	}
-	function handleAddNetworkClick(event) {
-		event.preventDefault();
-		props.onAddNetwork();
-	}
-	function handleManageNetworkClick(event) {
-		event.preventDefault();
-		props.onManageNetwork();
+	let fullyConnected = props.server.status === ServerStatus.REGISTERED;
+	if (props.bouncerNetwork) {
+		fullyConnected = fullyConnected && props.bouncerNetwork.state === "connected";
 	}
 
-	let description = null, actions = null;
+	let description = null, actions = [];
 	switch (props.buffer.type) {
 	case BufferType.SERVER:
 		switch (props.server.status) {
@@ -74,56 +62,95 @@ export default function BufferHeader(props) {
 			break;
 		}
 
-		if (props.isBouncer) {
-			if (props.server.isupport.get("BOUNCER_NETID")) {
-				actions = html`
-					<button
-						key="join"
-						onClick=${handleJoinClick}
-					>Join channel</button>
-					<button
-						key="manage"
-						onClick=${handleManageNetworkClick}
-					>Manage network</button>
-				`;
+		let joinButton = html`
+			<button
+				key="join"
+				onClick=${props.onJoin}
+			>Join channel</button>
+		`;
+		let reconnectButton = html`
+			<button
+				key="reconect"
+				onClick=${props.onReconnect}
+			>Reconnect</button>
+		`;
+
+		if (props.server.isBouncer) {
+			if (props.server.bouncerNetID) {
+				if (fullyConnected) {
+					actions.push(joinButton);
+				}
+				if (props.server.status === ServerStatus.REGISTERED) {
+					actions.push(html`
+						<button
+							key="manage"
+							onClick=${props.onManageNetwork}
+						>Manage network</button>
+					`);
+				}
 			} else {
-				actions = html`
-					<button
-						key="add"
-						onClick=${handleAddNetworkClick}
-					>Add network</button>
+				if (fullyConnected) {
+					actions.push(html`
+						<button
+							key="add"
+							onClick=${props.onAddNetwork}
+						>Add network</button>
+					`);
+				} else if (props.server.status === ServerStatus.DISCONNECTED) {
+					actions.push(reconnectButton);
+				}
+				actions.push(html`
 					<button
 						key="disconnect"
 						class="danger"
-						onClick=${handleCloseClick}
+						onClick=${props.onClose}
 					>Disconnect</button>
-				`;
+				`);
 			}
 		} else {
-			actions = html`
-				<button
-					key="join"
-					onClick=${handleJoinClick}
-				>Join channel</button>
+			if (fullyConnected) {
+				actions.push(joinButton);
+			} else if (props.server.status === ServerStatus.DISCONNECTED) {
+				actions.push(reconnectButton);
+			}
+			actions.push(html`
 				<button
 					key="disconnect"
 					class="danger"
-					onClick=${handleCloseClick}
+					onClick=${props.onClose}
 				>Disconnect</button>
-			`;
+			`);
 		}
 		break;
 	case BufferType.CHANNEL:
 		if (props.buffer.topic) {
 			description = linkify(stripANSI(props.buffer.topic), props.onChannelClick);
 		}
-		actions = html`
-			<button
-				key="part"
-				class="danger"
-				onClick=${handleCloseClick}
-			>Leave</button>
-		`;
+		if (props.buffer.joined) {
+			actions.push(html`
+				<button
+					key="part"
+					class="danger"
+					onClick=${props.onClose}
+				>Leave</button>
+			`);
+		} else {
+			if (fullyConnected) {
+				actions.push(html`
+					<button
+						key="join"
+						onClick=${props.onJoin}
+					>Join</button>
+				`);
+			}
+			actions.push(html`
+				<button
+					key="part"
+					class="danger"
+					onClick=${props.onClose}
+				>Close</button>
+			`);
+		}
 		break;
 	case BufferType.NICK:
 		if (props.user) {
@@ -144,9 +171,33 @@ export default function BufferHeader(props) {
 				details.push(`${props.user.username}@${props.user.hostname}`);
 			}
 			if (props.user.account) {
-				details.push(`authenticated as ${props.user.account}`);
+				let desc = `This user is verified and has logged in to the server with the account ${props.user.account}.`;
+				let item;
+				if (props.user.account === props.buffer.name) {
+					item = "authenticated";
+				} else {
+					item = `authenticated as ${props.user.account}`;
+				}
+				details.push(html`<abbr title=${desc}>${item}</abbr>`);
+			} else if (props.server.reliableUserAccounts) {
+				// If the server supports MONITOR and WHOX, we can faithfully
+				// keep user.account up-to-date for user queries
+				let desc = "This user has not been verified and is not logged in.";
+				details.push(html`<abbr title=${desc}>unauthenticated</abbr>`);
+			}
+			if (props.user.operator) {
+				let desc = "This user is a server operator, they have administrator privileges.";
+				details.push(html`<abbr title=${desc}>server operator</abbr>`);
+			}
+			details = details.map((item, i) => {
+				if (i === 0) {
+					return item;
+				}
+				return [", ", item];
+			});
+			if (details.length > 0) {
+				details = ["(", details, ")"];
 			}
-			details = details.length > 0 ? `(${details.join(", ")})` : null;
 
 			description = html`<${NickStatus} status=${status}/> ${realname} ${details}`;
 		}
@@ -155,7 +206,7 @@ export default function BufferHeader(props) {
 			<button
 				key="close"
 				class="danger"
-				onClick=${handleCloseClick}
+				onClick=${props.onClose}
 			>Close</button>
 		`;
 		break;
@@ -163,7 +214,7 @@ export default function BufferHeader(props) {
 
 	let name = props.buffer.name;
 	if (props.buffer.type == BufferType.SERVER) {
-		name = getServerName(props.server, props.bouncerNetwork, props.isBouncer);
+		name = getServerName(props.server, props.bouncerNetwork);
 	}
 
 	return html`

components/buffer-list.js

@@ -7,10 +7,16 @@ function BufferItem(props) {
 		event.preventDefault();
 		props.onClick();
 	}
+	function handleMouseDown(event) {
+		if (event.button === 1) { // middle click
+			event.preventDefault();
+			props.onClose();
+		}
+	}
 
 	let name = props.buffer.name;
 	if (props.buffer.type == BufferType.SERVER) {
-		name = getServerName(props.server, props.bouncerNetwork, props.isBouncer);
+		name = getServerName(props.server, props.bouncerNetwork);
 	}
 
 	let classes = ["type-" + props.buffer.type];
@@ -23,7 +29,11 @@ function BufferItem(props) {
 
 	return html`
 		<li class="${classes.join(" ")}">
-			<a href=${getBufferURL(props.buffer)} onClick=${handleClick}>${name}</a>
+			<a
+				href=${getBufferURL(props.buffer)}
+				onClick=${handleClick}
+				onMouseDown=${handleMouseDown}
+			>${name}</a>
 		</li>
 	`;
 }
@@ -34,7 +44,7 @@ export default function BufferList(props) {
 		let server = props.servers.get(buf.server);
 
 		let bouncerNetwork = null;
-		let bouncerNetID = server.isupport.get("BOUNCER_NETID");
+		let bouncerNetID = server.bouncerNetID;
 		if (bouncerNetID) {
 			bouncerNetwork = props.bouncerNetworks.get(bouncerNetID);
 		}
@@ -44,9 +54,9 @@ export default function BufferList(props) {
 				key=${buf.id}
 				buffer=${buf}
 				server=${server}
-				isBouncer=${props.isBouncer}
 				bouncerNetwork=${bouncerNetwork}
 				onClick=${() => props.onBufferClick(buf)}
+				onClose=${() => props.onBufferClose(buf)}
 				active=${props.activeBuffer == buf.id}
 			/>
 		`;

components/buffer.js

@@ -2,7 +2,8 @@ import { html, Component } from "../lib/index.js";
 import linkify from "../lib/linkify.js";
 import * as irc from "../lib/irc.js";
 import { strip as stripANSI } from "../lib/ansi.js";
-import { BufferType, getNickURL, getChannelURL, getMessageURL } from "../state.js";
+import { BufferType, ServerStatus, getNickURL, getChannelURL, getMessageURL } from "../state.js";
+import * as store from "../store.js";
 import Membership from "./membership.js";
 
 function djb2(s) {
@@ -76,6 +77,8 @@ class LogLine extends Component {
 
 		let onNickClick = this.props.onNickClick;
 		let onChannelClick = this.props.onChannelClick;
+		let onVerifyClick = this.props.onVerifyClick;
+
 		function createNick(nick) {
 			return html`
 				<${Nick} nick=${nick} onClick=${() => onNickClick(nick)}/>
@@ -95,11 +98,11 @@ class LogLine extends Component {
 
 		let lineClass = "";
 		let content;
-		let invitee;
+		let invitee, target, account;
 		switch (msg.command) {
 		case "NOTICE":
 		case "PRIVMSG":
-			let target = msg.params[0];
+			target = msg.params[0];
 			let text = msg.params[1];
 
 			let ctcp = irc.parseCTCP(msg);
@@ -122,7 +125,7 @@ class LogLine extends Component {
 			}
 
 			let status = null;
-			let allowedPrefixes = server.isupport.get("STATUSMSG");
+			let allowedPrefixes = server.statusMsg;
 			if (target !== buf.name && allowedPrefixes) {
 				let parts = irc.parseTargetPrefix(target, allowedPrefixes);
 				if (parts.name === buf.name) {
@@ -161,9 +164,14 @@ class LogLine extends Component {
 			`;
 			break;
 		case "MODE":
+			target = msg.params[0];
 			content = html`
 				* ${createNick(msg.prefix.name)} sets mode ${msg.params.slice(1).join(" ")}
 			`;
+			// TODO: case-mapping
+			if (buf.name !== target) {
+				content = html`${content} on ${target}`;
+			}
 			break;
 		case "TOPIC":
 			let topic = msg.params[1];
@@ -186,6 +194,10 @@ class LogLine extends Component {
 				`;
 			}
 			break;
+		case irc.RPL_WELCOME:
+			let nick = msg.params[0];
+			content = html`Connected to server, your nickname is ${nick}`;
+			break;
 		case irc.RPL_INVITING:
 			invitee = msg.params[1];
 			content = html`${createNick(invitee)} has been invited to the channel`;
@@ -194,11 +206,59 @@ class LogLine extends Component {
 			lineClass = "motd";
 			content = linkify(stripANSI(msg.params[1]), onChannelClick);
 			break;
+		case irc.RPL_LOGGEDIN:
+			account = msg.params[2];
+			content = html`You are now authenticated as ${account}`;
+			break;
+		case irc.RPL_LOGGEDOUT:
+			content = html`You are now unauthenticated`;
+			break;
+		case "REGISTER":
+			account = msg.params[1];
+			let reason = msg.params[2];
+
+			function handleVerifyClick(event) {
+				event.preventDefault();
+				onVerifyClick(account, reason);
+			}
+
+			switch (msg.params[0]) {
+			case "SUCCESS":
+				content = html`A new account has been created, you are now authenticated as ${account}`;
+				break;
+			case "VERIFICATION_REQUIRED":
+				content = html`A new account has been created, but you need to <a href="#" onClick=${handleVerifyClick}>verify it</a>: ${linkify(reason)}`;
+				break;
+			}
+			break;
+		case "VERIFY":
+			account = msg.params[1];
+			content = html`The new account has been verified, you are now authenticated as ${account}`;
+			break;
+		case irc.RPL_UMODEIS:
+			let mode = msg.params[1];
+			if (mode) {
+				content = html`Your user mode is ${mode}`;
+			} else {
+				content = html`You have no user mode`;
+			}
+			break;
+		case irc.RPL_CHANNELMODEIS:
+			content = html`Channel mode is ${msg.params.slice(2).join(" ")}`;
+			break;
+		case irc.RPL_CREATIONTIME:
+			let date = new Date(parseInt(msg.params[2], 10) * 1000);
+			content = html`Channel was created on ${date.toLocaleString()}`;
+			break;
 		default:
 			if (irc.isError(msg.command) && msg.command != irc.ERR_NOMOTD) {
 				lineClass = "error";
 			}
-			content = html`${msg.command} ${msg.params.join(" ")}`;
+			content = html`${msg.command} ${linkify(msg.params.join(" "))}`;
+		}
+
+		if (!content) {
+			return null;
 		}
 
 		return html`
@@ -266,7 +326,9 @@ class FoldGroup extends Component {
 				return;
 			}
 
-			let plural = byCommand[cmd].length > 1;
+			let nicks = new Set(byCommand[cmd].map((msg) => msg.prefix.name));
+
+			let plural = nicks.size > 1;
 			let action;
 			switch (cmd) {
 			case "JOIN":
@@ -286,9 +348,7 @@ class FoldGroup extends Component {
 				content.push(", ");
 			}
 
-			let nicks = byCommand[cmd].map((msg) => msg.prefix.name);
-
-			content.push(createNickList(nicks, createNick));
+			content.push(createNickList([...nicks], createNick));
 			content.push(" " + action);
 		});
 
@@ -384,6 +444,82 @@ class NotificationNagger extends Component {
 	}
 }
 
+class ProtocolHandlerNagger extends Component {
+	state = { nag: true };
+
+	constructor(props) {
+		super(props);
+
+		this.handleClick = this.handleClick.bind(this);
+
+		this.state.nag = !store.naggedProtocolHandler.load();
+	}
+
+	handleClick(event) {
+		event.preventDefault();
+
+		let url = window.location.origin + window.location.pathname + "?open=%s";
+		try {
+			navigator.registerProtocolHandler("irc", url);
+			navigator.registerProtocolHandler("ircs", url);
+		} catch (err) {
+			console.error("Failed to register protocol handler: ", err);
+		}
+
+		store.naggedProtocolHandler.put(true);
+		this.setState({ nag: false });
+	}
+
+	render() {
+		if (!navigator.registerProtocolHandler || !this.state.nag) {
+			return null;
+		}
+		let name = this.props.bouncerName || "this bouncer";
+		return html`
+			<div class="logline">
+				<${Timestamp}/>
+				${" "}
+				<a href="#" onClick=${this.handleClick}>Register our protocol handler</a> to open IRC links with ${name}
+			</div>
+		`;
+	}
+}
+
+function AccountNagger({ server, onAuthClick, onRegisterClick }) {
+	let accDesc = "an account on this server";
+	if (server.name) {
+		accDesc = "a " + server.name + " account";
+	}
+
+	function handleAuthClick(event) {
+		event.preventDefault();
+		onAuthClick();
+	}
+	function handleRegisterClick(event) {
+		event.preventDefault();
+		onRegisterClick();
+	}
+
+	let msg = [html`
+		You are unauthenticated on this server,
+		${" "}
+		<a href="#" onClick=${handleAuthClick}>login</a>
+		${" "}
+	`];
+
+	if (server.supportsAccountRegistration) {
+		msg.push(html`or <a href="#" onClick=${handleRegisterClick}>register</a> ${accDesc}`);
+	} else {
+		msg.push(html`if you have ${accDesc}`);
+	}
+
+	return html`
+		<div class="logline">
+			<${Timestamp}/> ${msg}
+		</div>
+	`;
+}
+
 class DateSeparator extends Component {
 	constructor(props) {
 		super(props);
@@ -422,18 +558,35 @@ export default class Buffer extends Component {
 
 	render() {
 		let buf = this.props.buffer;
-		let server = this.props.server;
 		if (!buf) {
 			return null;
 		}
 
+		let server = this.props.server;
+		let bouncerNetwork = this.props.bouncerNetwork;
+		let serverName = server.name;
+
 		let children = [];
 		if (buf.type == BufferType.SERVER) {
 			children.push(html`<${NotificationNagger}/>`);
 		}
+		if (buf.type == BufferType.SERVER && server.isBouncer && !server.bouncerNetID) {
+			children.push(html`<${ProtocolHandlerNagger} bouncerName=${serverName}/>`);
+		}
+		if (buf.type == BufferType.SERVER && server.status == ServerStatus.REGISTERED && server.supportsSASLPlain && !server.account) {
+			children.push(html`
+				<${AccountNagger}
+					server=${server}
+					onAuthClick=${this.props.onAuthClick}
+					onRegisterClick=${this.props.onRegisterClick}
+				/>
+			`);
+		}
 
 		let onChannelClick = this.props.onChannelClick;
 		let onNickClick = this.props.onNickClick;
+		let onVerifyClick = this.props.onVerifyClick;
+
 		function createLogLine(msg) {
 			return html`
 				<${LogLine}
@@ -443,6 +596,7 @@ export default class Buffer extends Component {
 					server=${server}
 					onChannelClick=${onChannelClick}
 					onNickClick=${onNickClick}
+					onVerifyClick=${onVerifyClick}
 				/>
 			`;
 		}

components/connect-form.js

@@ -1,4 +1,5 @@
 import { html, Component, createRef } from "../lib/index.js";
+import linkify from "../lib/linkify.js";
 
 export default class ConnectForm extends Component {
 	state = {
@@ -9,7 +10,7 @@ export default class ConnectForm extends Component {
 		rememberMe: false,
 		username: "",
 		realname: "",
-		autojoin: "",
+		autojoin: true,
 	};
 	nickInput = createRef();
 
@@ -27,7 +28,6 @@ export default class ConnectForm extends Component {
 				rememberMe: props.params.autoconnect || false,
 				username: props.params.username || "",
 				realname: props.params.realname || "",
-				autojoin: (props.params.autojoin || []).join(","),
 			};
 		}
 	}
@@ -61,15 +61,13 @@ export default class ConnectForm extends Component {
 				username: params.username || params.nick,
 				password: this.state.password,
 			};
+		} else if (this.props.auth === "external") {
+			params.saslExternal = true;
 		}
 
-		this.state.autojoin.split(",").forEach(function(ch) {
-			ch = ch.trim();
-			if (!ch) {
-				return;
-			}
-			params.autojoin.push(ch);
-		});
+		if (this.state.autojoin) {
+			params.autojoin = this.props.params.autojoin || [];
+		}
 
 		this.props.onSubmit(params);
 	}
@@ -107,12 +105,12 @@ export default class ConnectForm extends Component {
 			`;
 		} else if (this.props.error) {
 			status = html`
-				<p class="error-text">${this.props.error}</p>
+				<p class="error-text">${linkify(this.props.error)}</p>
 			`;
 		}
 
 		let auth = null;
-		if (this.props.auth !== "disabled") {
+		if (this.props.auth !== "disabled" && this.props.auth !== "external") {
 			auth = html`
 				<label>
 					Password:<br/>
@@ -129,22 +127,22 @@ export default class ConnectForm extends Component {
 			`;
 		}
 
-		let autojoin = html`
-			<label>
-				Auto-join channels:<br/>
-				<input
-					type="text"
-					name="autojoin"
-					value=${this.state.autojoin}
-					disabled=${disabled}
-					placeholder="Comma-separated list of channels"
-				/>
-			</label>
-			<br/>
-		`;
-
-		// Show autojoin field in advanced options, except if it's pre-filled
-		let isAutojoinAdvanced = (this.props.params.autojoin || []).length === 0;
+		let autojoin = null;
+		let channels = this.props.params.autojoin || [];
+		if (channels.length > 0) {
+			let s = channels.length > 1 ? "s" : "";
+			autojoin = html`
+				<label>
+					<input
+						type="checkbox"
+						name="autojoin"
+						checked=${this.state.autojoin}
+					/>
+					Auto-join channel${s} <strong>${channels.join(', ')}</strong>
+				</label>
+				<br/><br/>
+			`;
+		}
 
 		return html`
 			<form onChange=${this.handleChange} onSubmit=${this.handleSubmit}>
@@ -165,7 +163,7 @@ export default class ConnectForm extends Component {
 
 				${auth}
 
-				${!isAutojoinAdvanced ? [autojoin, html`<br/>`] : null}
+				${autojoin}
 
 				<label>
 					<input
@@ -220,8 +218,6 @@ export default class ConnectForm extends Component {
 						/>
 					</label>
 					<br/><br/>
-
-					${isAutojoinAdvanced ? autojoin : null}
 				</details>
 
 				<br/>

components/join-form.js

@@ -10,6 +10,10 @@ export default class JoinForm extends Component {
 
 		this.handleChange = this.handleChange.bind(this);
 		this.handleSubmit = this.handleSubmit.bind(this);
+
+		if (props.channel) {
+			this.state.channel = props.channel;
+		}
 	}
 
 	handleChange(event) {

components/member-list.js

@@ -13,7 +13,8 @@ class MemberItem extends Component {
 
 	shouldComponentUpdate(nextProps) {
 		return this.props.nick !== nextProps.nick
-			|| this.props.membership !== nextProps.membership;
+			|| this.props.membership !== nextProps.membership
+			|| this.props.user !== nextProps.user;
 	}
 
 	handleClick(event) {
@@ -43,6 +44,7 @@ class MemberItem extends Component {
 
 		let title = null;
 		let user = this.props.user;
+		let classes = ["nick"];
 		if (user) {
 			let mask = "";
 			if (user.username && user.hostname) {
@@ -61,13 +63,18 @@ class MemberItem extends Component {
 			if (user.account) {
 				title += `\nAuthenticated as ${user.account}`;
 			}
+
+			if (user.away) {
+				classes.push("away");
+				title += "\nAway";
+			}
 		}
 
 		return html`
 			<li>
 				<a
 					href=${getNickURL(this.props.nick)}
-					class="nick"
+					class=${classes.join(" ")}
 					title=${title}
 					onClick=${this.handleClick}
 				>
@@ -99,7 +106,8 @@ function sortMembers(a, b) {
 
 export default class MemberList extends Component {
 	shouldComponentUpdate(nextProps) {
-		return this.props.members !== nextProps.members;
+		return this.props.members !== nextProps.members
+			|| this.props.users !== nextProps.users;
 	}
 
 	render() {

components/network-form.js

@@ -14,7 +14,7 @@ export default class NetworkForm extends Component {
 	prevParams = null;
 	state = {
 		...defaultParams,
-		isNew: true,
+		autojoin: true,
 	};
 
 	constructor(props) {
@@ -25,8 +25,6 @@ export default class NetworkForm extends Component {
 		this.handleChange = this.handleChange.bind(this);
 		this.handleSubmit = this.handleSubmit.bind(this);
 
-		this.state.isNew = !props.params;
-
 		if (props.params) {
 			Object.keys(defaultParams).forEach((k) => {
 				if (props.params[k] !== undefined) {
@@ -48,18 +46,22 @@ export default class NetworkForm extends Component {
 
 		let params = {};
 		Object.keys(defaultParams).forEach((k) => {
-			if (this.prevParams[k] == this.state[k]) {
+			if (!this.props.isNew && this.prevParams[k] == this.state[k]) {
+				return;
+			}
+			if (this.props.isNew && defaultParams[k] == this.state[k]) {
 				return;
 			}
 			params[k] = this.state[k];
 		});
 
-		this.props.onSubmit(params);
+		let autojoin = this.state.autojoin ? this.props.autojoin : null;
+		this.props.onSubmit(params, autojoin);
 	}
 
 	render() {
 		let removeNetwork = null;
-		if (!this.state.isNew) {
+		if (!this.props.isNew) {
 			removeNetwork = html`
 				<button type="button" class="danger" onClick=${() => this.props.onRemove()}>
 					Remove network
@@ -67,6 +69,21 @@ export default class NetworkForm extends Component {
 			`;
 		}
 
+		let autojoin = null;
+		if (this.props.autojoin) {
+			autojoin = html`
+				<label>
+					<input
+						type="checkbox"
+						name="autojoin"
+						checked=${this.state.autojoin}
+					/>
+					Auto-join channel <strong>${this.props.autojoin}</strong>
+				</label>
+				<br/><br/>
+			`;
+		}
+
 		return html`
 			<form onChange=${this.handleChange} onSubmit=${this.handleSubmit}>
 				<label>
@@ -75,6 +92,8 @@ export default class NetworkForm extends Component {
 				</label>
 				<br/><br/>
 
+				${autojoin}
+
 				<details>
 					<summary role="button">Advanced options</summary>
 
@@ -121,7 +140,7 @@ export default class NetworkForm extends Component {
 				${removeNetwork}
 				${" "}
 				<button>
-					${this.state.isNew ? "Add network" : "Save network"}
+					${this.props.isNew ? "Add network" : "Save network"}
 				</button>
 			</form>
 		`;

components/register-form.js

@@ -0,0 +1,54 @@
+import { html, Component } from "../lib/index.js";
+
+export default class RegisterForm extends Component {
+	state = {
+		email: "",
+		password: "",
+	};
+
+	constructor(props) {
+		super(props);
+
+		this.handleChange = this.handleChange.bind(this);
+		this.handleSubmit = this.handleSubmit.bind(this);
+	}
+
+	handleChange(event) {
+		let target = event.target;
+		let value = target.type == "checkbox" ? target.checked : target.value;
+		this.setState({ [target.name]: value });
+	}
+
+	handleSubmit(event) {
+		event.preventDefault();
+
+		this.props.onSubmit(this.state.email, this.state.password);
+	}
+
+	render() {
+		return html`
+			<form onChange=${this.handleChange} onSubmit=${this.handleSubmit}>
+				<label>
+					E-mail:<br/>
+					<input
+						type="email"
+						name="email"
+						value=${this.state.email}
+						required=${this.props.emailRequired}
+						placeholder=${this.props.emailRequired ? null : "(optional)"}
+						autofocus
+					/>
+				</label>
+				<br/><br/>
+
+				<label>
+					Password:<br/>
+					<input type="password" name="password" value=${this.state.password} required/>
+				</label>
+				<br/><br/>
+
+				<button>Register</button>
+			</form>
+		`;
+	}
+}

components/verify-form.js

@@ -0,0 +1,45 @@
+import { html, Component } from "../lib/index.js";
+import linkify from "../lib/linkify.js";
+
+export default class RegisterForm extends Component {
+	state = {
+		code: "",
+	};
+
+	constructor(props) {
+		super(props);
+
+		this.handleChange = this.handleChange.bind(this);
+		this.handleSubmit = this.handleSubmit.bind(this);
+	}
+
+	handleChange(event) {
+		let target = event.target;
+		let value = target.type == "checkbox" ? target.checked : target.value;
+		this.setState({ [target.name]: value });
+	}
+
+	handleSubmit(event) {
+		event.preventDefault();
+
+		this.props.onSubmit(this.state.code);
+	}
+
+	render() {
+		return html`
+			<form onChange=${this.handleChange} onSubmit=${this.handleSubmit}>
+				<p>Your account <strong>${this.props.account}</strong> has been created, but a verification code is required to complete the registration.</p>
+
+				<p>${linkify(this.props.message)}</p>
+
+				<label>
+					Verification code:<br/>
+					<input type="text" name="code" value=${this.state.code} required autofocus autocomplete="off"/>
+				</label>
+				<br/><br/>
+
+				<button>Verify account</button>
+			</form>
+		`;
+	}
+}

dev-server.js

@@ -0,0 +1,78 @@
+import * as http from "http";
+import * as tls from "tls";
+import split from "split";
+import { Server as StaticServer } from "node-static";
+import { WebSocketServer } from "ws";
+
+const WS_BAD_GATEWAY = 1014;
+
+const usage = `usage: [options...] [host]
+
+Starts an HTTP server delivering static files. If [host] is specified, the
+server will proxy WebSocket connections to the specified remote IRC server.
+
+Options:
+  -p <port>  Listening port (default: 8080)
+  -h         Show help message
+`;
+
+let localPort = 8080;
+let remoteHost;
+let remotePort = 6697;
+
+let args = process.argv.slice(2);
+while (args.length > 0 && args[0].startsWith("-")) {
+	switch (args[0]) {
+	case "-p":
+		localPort = parseInt(args[1], 10);
+		args = args.slice(2);
+		break;
+	default:
+		console.log(usage);
+		process.exit(args[0] === "-h" ? 0 : 1);
+	}
+}
+remoteHost = args[0];
+
+let staticServer = new StaticServer(".");
+
+let server = http.createServer((req, res) => {
+	staticServer.serve(req, res);
+});
+
+if (remoteHost) {
+	let wsServer = new WebSocketServer({ server });
+	wsServer.on("connection", (ws) => {
+		let client = tls.connect(remotePort, remoteHost, {
+			ALPNProtocols: ["irc"],
+		});
+
+		ws.on("message", (data) => {
+			client.write(data.toString() + "\r\n");
+		});
+
+		ws.on("close", () => {
+			client.destroy();
+		});
+
+		client.pipe(split()).on("data", (data) => {
+			ws.send(data.toString());
+		});
+
+		client.on("end", () => {
+			ws.close();
+		});
+
+		client.on("error", () => {
+			ws.close(WS_BAD_GATEWAY);
+		});
+	});
+}
+
+server.listen(localPort, "localhost");
+
+let msg = "HTTP server listening on http://localhost:" + localPort;
+if (remoteHost) {
+	msg += " and proxying WebSockets to " + remoteHost;
+}
+console.log(msg);

index.html

@@ -2,20 +2,16 @@
 <html>
 	<head>
 		<meta charset="utf-8">
+		<meta http-equiv="Content-Security-Policy" content="default-src 'self'; frame-src 'none'; object-src 'none'; connect-src *;">
 		<title>gamja IRC client</title>
 		<link rel="stylesheet" href="./style.css">
+		<script type="module" src="./main.js"></script>
 		<meta name="viewport" content="width=device-width, initial-scale=1">
 		<link rel="manifest" href="manifest.json">
 	</head>
 	<body>
 		<noscript>
-			<p>Unfortunately gamja requires JavaScript. Please enable it!</p>
+			<p>This application requires JavaScript. Please enable it!</p>
 		</noscript>
-		<script type="module">
-			import { html, render } from "./lib/index.js";
-			import App from "./components/app.js";
-
-			render(html`<${App}/>`, document.body);
-		</script>
 	</body>
 </html>

lib/client.js

@@ -13,16 +13,20 @@ const permanentCaps = [
 	"labeled-response",
 	"message-tags",
 	"multi-prefix",
+	"sasl",
 	"server-time",
 	"setname",
 
+	"draft/account-registration",
 	"draft/chathistory",
 	"draft/event-playback",
+	"draft/extended-monitor",
 
 	"soju.im/bouncer-networks",
 ];
 
-const RECONNECT_DELAY_SEC = 10;
+const RECONNECT_MIN_DELAY_MSEC = 10 * 1000; // 10s
+const RECONNECT_MAX_DELAY_MSEC = 10 * 60 * 1000; // 10min
 
 // WebSocket status codes
 // https://www.rfc-editor.org/rfc/rfc6455.html#section-7.4.1
@@ -46,6 +50,53 @@ const WHOX_FIELDS = {
 let lastLabel = 0;
 let lastWhoxToken = 0;
 
+class IRCError extends Error {
+	constructor(msg) {
+		let text;
+		if (msg.params.length > 0) {
+			// IRC errors have a human-readable message as last param
+			text = msg.params[msg.params.length - 1];
+		} else {
+			text = `unknown error (${msg.command})`;
+		}
+		super(text);
+
+		this.msg = msg;
+	}
+}
+
+/**
+ * Implements a simple exponential backoff.
+ */
+class Backoff {
+	n = 0;
+
+	constructor(min, max) {
+		this.min = min;
+		this.max = max;
+	}
+
+	reset() {
+		this.n = 0;
+	}
+
+	next() {
+		if (this.n === 0) {
+			this.n = 1;
+			return this.min;
+		}
+
+		let dur = this.n * this.min;
+		if (dur > this.max) {
+			dur = this.max;
+		} else {
+			this.n *= 2;
+		}
+
+		return dur;
+	}
+}
+
 export default class Client extends EventTarget {
 	static Status = {
 		DISCONNECTED: "disconnected",
@@ -57,9 +108,9 @@ export default class Client extends EventTarget {
 	status = Client.Status.DISCONNECTED;
 	serverPrefix = { name: "*" };
 	nick = null;
-	availableCaps = {};
-	enabledCaps = {};
-	isupport = new Map();
+	supportsCap = false;
+	caps = new irc.CapRegistry();
+	isupport = new irc.Isupport();
 
 	ws = null;
 	params = {
@@ -69,16 +120,22 @@ export default class Client extends EventTarget {
 		nick: null,
 		pass: null,
 		saslPlain: null,
+		saslExternal: false,
 		bouncerNetwork: null,
 	};
+	debug = false;
 	batches = new Map();
 	autoReconnect = true;
 	reconnectTimeoutID = null;
+	reconnectBackoff = new Backoff(RECONNECT_MIN_DELAY_MSEC, RECONNECT_MAX_DELAY_MSEC);
 	pingIntervalID = null;
-	pendingHistory = Promise.resolve(null);
+	pendingCmds = {
+		WHO: Promise.resolve(null),
+		CHATHISTORY: Promise.resolve(null),
+	};
 	cm = irc.CaseMapping.RFC1459;
 	monitored = new irc.CaseMapMap(null, irc.CaseMapping.RFC1459);
-	whoisDB = new irc.CaseMapMap(null, irc.CaseMapping.RFC1459);
+	pendingLists = new irc.CaseMapMap(null, irc.CaseMapping.RFC1459);
 	whoxQueries = new Map();
 
 	constructor(params) {
@@ -102,30 +159,39 @@ export default class Client extends EventTarget {
 		} catch (err) {
 			console.error("Failed to create connection:", err);
 			setTimeout(() => {
-				this.dispatchEvent(new CustomEvent("error", { detail: "Failed to create connection: " + err }));
+				this.dispatchError(new Error("Failed to create connection", { cause: err }));
 				this.setStatus(Client.Status.DISCONNECTED);
 			}, 0);
 			return;
 		}
 		this.ws.addEventListener("open", this.handleOpen.bind(this));
-		this.ws.addEventListener("message", this.handleMessage.bind(this));
+
+		this.ws.addEventListener("message", (event) => {
+			try {
+				this.handleMessage(event);
+			} catch (err) {
+				this.dispatchError(err);
+				this.disconnect();
+			}
+		});
 
 		this.ws.addEventListener("close", (event) => {
 			console.log("Connection closed (code: " + event.code + ")");
 
 			if (event.code !== NORMAL_CLOSURE && event.code !== GOING_AWAY) {
-				this.dispatchEvent(new CustomEvent("error", { detail: "Connection error" }));
+				this.dispatchError(new Error("Connection error"));
 			}
 
 			this.ws = null;
 			this.setStatus(Client.Status.DISCONNECTED);
 			this.nick = null;
 			this.serverPrefix = null;
-			this.availableCaps = {};
-			this.enabledCaps = {};
+			this.caps = new irc.CapRegistry();
 			this.batches = new Map();
-			this.pendingHistory = Promise.resolve(null);
-			this.isupport = new Map();
+			Object.keys(this.pendingCmds).forEach((k) => {
+				this.pendingCmds[k] = Promise.resolve(null);
+			});
+			this.isupport = new irc.Isupport();
 			this.monitored = new irc.CaseMapMap(null, irc.CaseMapping.RFC1459);
 
 			if (this.autoReconnect) {
@@ -137,11 +203,12 @@ export default class Client extends EventTarget {
 					};
 					window.addEventListener("online", handleOnline);
 				} else {
-					console.info("Reconnecting to server in " + RECONNECT_DELAY_SEC + " seconds");
+					let delay = this.reconnectBackoff.next();
+					console.info("Reconnecting to server in " + (delay / 1000) + " seconds");
 					clearTimeout(this.reconnectTimeoutID);
 					this.reconnectTimeoutID = setTimeout(() => {
 						this.reconnect();
-					}, RECONNECT_DELAY_SEC * 1000);
+					}, delay);
 				}
 			}
 		});
@@ -168,10 +235,16 @@ export default class Client extends EventTarget {
 		this.dispatchEvent(new CustomEvent("status"));
 	}
 
+	dispatchError(err) {
+		this.dispatchEvent(new CustomEvent("error", { detail: err }));
+	}
+
 	handleOpen() {
 		console.log("Connection opened");
 		this.setStatus(Client.Status.REGISTERING);
 
+		this.reconnectBackoff.reset();
+
 		this.nick = this.params.nick;
 
 		this.send({ command: "CAP", params: ["LS", "302"] });
@@ -185,6 +258,20 @@ export default class Client extends EventTarget {
 		});
 	}
 
+	pushPendingList(k, msg) {
+		let l = this.pendingLists.get(k);
+		if (!l) {
+			l = [];
+			this.pendingLists.set(k, l);
+		}
+		l.push(msg);
+	}
+
+	endPendingList(k, msg) {
+		msg.list = this.pendingLists.get(k) || [];
+		this.pendingLists.delete(k);
+	}
+
 	handleMessage(event) {
 		if (typeof event.data !== "string") {
 			console.error("Received unsupported data type:", event.data);
@@ -193,7 +280,9 @@ export default class Client extends EventTarget {
 		}
 
 		let msg = irc.parseMessage(event.data);
-		console.debug("Received:", msg);
+		if (this.debug) {
+			console.debug("Received:", msg);
+		}
 
 		// If the prefix is missing, assume it's coming from the server on the
 		// other end of the connection
@@ -210,10 +299,11 @@ export default class Client extends EventTarget {
 		}
 
 		let deleteBatch = null;
+		let k;
 		switch (msg.command) {
 		case irc.RPL_WELCOME:
-			if (this.params.saslPlain && this.availableCaps["sasl"] === undefined) {
-				this.dispatchEvent(new CustomEvent("error", { detail: "Server doesn't support SASL PLAIN" }));
+			if (this.params.saslPlain && !this.supportsCap) {
+				this.dispatchError(new Error("Server doesn't support SASL PLAIN"));
 				this.disconnect();
 				return;
 			}
@@ -221,34 +311,42 @@ export default class Client extends EventTarget {
 			if (msg.prefix) {
 				this.serverPrefix = msg.prefix;
 			}
+			this.nick = msg.params[0];
 
 			console.log("Registration complete");
 			this.setStatus(Client.Status.REGISTERED);
 			break;
 		case irc.RPL_ISUPPORT:
+			let prevMaxMonitorTargets = this.isupport.monitor();
+
 			let tokens = msg.params.slice(1, -1);
-			let changed = irc.parseISUPPORT(tokens, this.isupport);
-			if (changed.indexOf("CASEMAPPING") >= 0) {
-				this.setCaseMapping(this.isupport.get("CASEMAPPING"));
-			}
-			if (changed.indexOf("MONITOR") >= 0 && this.isupport.has("MONITOR") && this.monitored.size > 0) {
-				let targets = Array.from(this.monitored.keys()).slice(0, this.maxMonitorTargets());
+			this.isupport.parse(tokens);
+			this.updateCaseMapping();
+
+			let maxMonitorTargets = this.isupport.monitor();
+			if (prevMaxMonitorTargets === 0 && this.monitored.size > 0 && maxMonitorTargets > 0) {
+				let targets = Array.from(this.monitored.keys()).slice(0, maxMonitorTargets);
 				this.send({ command: "MONITOR", params: ["+", targets.join(",")] });
 			}
 			break;
 		case irc.RPL_ENDOFMOTD:
 		case irc.ERR_NOMOTD:
 			// These messages are used to indicate the end of the ISUPPORT list
-			if (!this.isupport.has("CASEMAPPING")) {
+			if (!this.isupport.raw.has("CASEMAPPING")) {
 				// Server didn't send any CASEMAPPING token, assume RFC 1459
-				this.setCaseMapping("rfc1459");
+				this.updateCaseMapping();
 			}
 			break;
 		case "CAP":
 			this.handleCap(msg);
 			break;
 		case "AUTHENTICATE":
-			this.handleAuthenticate(msg);
+			// Both PLAIN and EXTERNAL expect an empty challenge
+			let challengeStr = msg.params[0];
+			if (challengeStr != "+") {
+				this.dispatchError(new Error("Expected an empty challenge, got: " + challengeStr));
+				this.send({ command: "AUTHENTICATE", params: ["*"] });
+			}
 			break;
 		case irc.RPL_LOGGEDIN:
 			console.log("Logged in");
@@ -256,41 +354,35 @@ export default class Client extends EventTarget {
 		case irc.RPL_LOGGEDOUT:
 			console.log("Logged out");
 			break;
-		case irc.RPL_SASLSUCCESS:
-			console.log("SASL authentication success");
-			if (this.status != Client.Status.REGISTERED) {
-				if (this.enabledCaps["soju.im/bouncer-networks"] && this.params.bouncerNetwork) {
-					this.send({ command: "BOUNCER", params: ["BIND", this.params.bouncerNetwork] });
-				}
-				this.send({ command: "CAP", params: ["END"] });
-			}
+		case irc.RPL_NAMREPLY:
+			this.pushPendingList("NAMES " + msg.params[2], msg);
+			break;
+		case irc.RPL_ENDOFNAMES:
+			this.endPendingList("NAMES " + msg.params[1], msg);
 			break;
 		case irc.RPL_WHOISUSER:
 		case irc.RPL_WHOISSERVER:
 		case irc.RPL_WHOISOPERATOR:
 		case irc.RPL_WHOISIDLE:
 		case irc.RPL_WHOISCHANNELS:
-		case irc.RPL_ENDOFWHOIS:
-			let nick = msg.params[1];
-			if (!this.whoisDB.has(nick)) {
-				this.whoisDB.set(nick, {});
-			}
-			this.whoisDB.get(nick)[msg.command] = msg;
+			this.pushPendingList("WHOIS " + msg.params[1], msg);
 			break;
-		case irc.ERR_NICKLOCKED:
-		case irc.ERR_SASLFAIL:
-		case irc.ERR_SASLTOOLONG:
-		case irc.ERR_SASLABORTED:
-		case irc.ERR_SASLALREADY:
-			this.dispatchEvent(new CustomEvent("error", { detail: "SASL error (" + msg.command + "): " + msg.params[1] }));
-			this.disconnect();
+		case irc.RPL_ENDOFWHOIS:
+			this.endPendingList("WHOIS " + msg.params[1], msg);
+			break;
+		case irc.RPL_WHOREPLY:
+		case irc.RPL_WHOSPCRPL:
+			this.pushPendingList("WHO", msg);
+			break;
+		case irc.RPL_ENDOFWHO:
+			this.endPendingList("WHO", msg);
 			break;
 		case "PING":
 			this.send({ command: "PONG", params: [msg.params[0]] });
 			break;
 		case "NICK":
 			let newNick = msg.params[0];
-			if (msg.prefix.name == this.nick) {
+			if (this.isMyNick(msg.prefix.name)) {
 				this.nick = newNick;
 			}
 			break;
@@ -311,7 +403,7 @@ export default class Client extends EventTarget {
 			}
 			break;
 		case "ERROR":
-			this.dispatchEvent(new CustomEvent("error", { detail: "Fatal IRC error: " + msg.params[0] }));
+			this.dispatchError(new IRCError(msg));
 			this.disconnect();
 			break;
 		case irc.ERR_PASSWDMISMATCH:
@@ -321,18 +413,26 @@ export default class Client extends EventTarget {
 		case irc.ERR_UNAVAILRESOURCE:
 		case irc.ERR_NOPERMFORHOST:
 		case irc.ERR_YOUREBANNEDCREEP:
-			this.dispatchEvent(new CustomEvent("error", { detail: "Error (" + msg.command + "): " + msg.params[msg.params.length - 1] }));
+			this.dispatchError(new IRCError(msg));
 			if (this.status != Client.Status.REGISTERED) {
 				this.disconnect();
 			}
 			break;
 		case "FAIL":
+			if (this.status === Client.Status.REGISTERED) {
+				break;
+			}
+			let reason = msg.params[msg.params.length - 1];
 			if (msg.params[0] === "BOUNCER" && msg.params[2] === "BIND") {
-				this.dispatchEvent(new CustomEvent("error", {
-					detail: "Failed to bind to bouncer network: " + msg.params[3],
+				this.dispatchError(new Error("Failed to bind to bouncer network", {
+					cause: new IRCError(msg),
 				}));
 				this.disconnect();
 			}
+			if (msg.params[1] === "ACCOUNT_REQUIRED") {
+				this.dispatchError(new IRCError(msg));
+				this.disconnect();
+			}
 			break;
 		}
 
@@ -347,11 +447,48 @@ export default class Client extends EventTarget {
 		}
 	}
 
+	authenticate(mechanism, params) {
+		if (!this.supportsSASL(mechanism)) {
+			throw new Error(`${mechanism} authentication not supported by the server`);
+		}
+		console.log(`Starting SASL ${mechanism} authentication`);
+
+		// Send the first SASL response immediately to avoid a roundtrip
+		let initialResp = null;
+		switch (mechanism) {
+		case "PLAIN":
+			let respStr = btoa("\0" + params.username + "\0" + params.password);
+			initialResp = { command: "AUTHENTICATE", params: [respStr] };
+			break;
+		case "EXTERNAL":
+			initialResp = { command: "AUTHENTICATE", params: [btoa("")] };
+			break;
+		default:
+			throw new Error(`Unknown authentication mechanism '${mechanism}'`);
+		}
+
+		let startMsg = { command: "AUTHENTICATE", params: [mechanism] };
+		let promise = this.roundtrip(startMsg, (msg) => {
+			switch (msg.command) {
+			case irc.RPL_SASLSUCCESS:
+				return true;
+			case irc.ERR_NICKLOCKED:
+			case irc.ERR_SASLFAIL:
+			case irc.ERR_SASLTOOLONG:
+			case irc.ERR_SASLABORTED:
+			case irc.ERR_SASLALREADY:
+				throw new IRCError(msg);
+			}
+		});
+		this.send(initialResp);
+		return promise;
+	}
+
 	who(mask, options) {
 		let params = [mask];
 
 		let fields = "", token = "";
-		if (options && this.isupport.has("WHOX")) {
+		if (options && this.isupport.whox()) {
 			let match = ""; // Matches exact channel or nick
 
 			fields = "t"; // Always include token in reply
@@ -373,27 +510,30 @@ export default class Client extends EventTarget {
 
 		let msg = { command: "WHO", params };
 		let l = [];
-		return this.roundtrip(msg, (msg) => {
-			switch (msg.command) {
-			case irc.RPL_WHOREPLY:
-				// TODO: match with mask
-				l.push(this.parseWhoReply(msg));
-				break;
-			case irc.RPL_WHOSPCRPL:
-				if (msg.params.length !== fields.length || msg.params[1] !== token) {
+		let promise = this.pendingCmds.WHO.then(() => {
+			return this.roundtrip(msg, (msg) => {
+				switch (msg.command) {
+				case irc.RPL_WHOREPLY:
+					l.push(this.parseWhoReply(msg));
+					break;
+				case irc.RPL_WHOSPCRPL:
+					if (msg.params.length !== fields.length || msg.params[1] !== token) {
+						break;
+					}
+					l.push(this.parseWhoReply(msg));
+					break;
+				case irc.RPL_ENDOFWHO:
+					if (msg.params[1] === mask) {
+						return l;
+					}
 					break;
 				}
-				l.push(this.parseWhoReply(msg));
-				break;
-			case irc.RPL_ENDOFWHO:
-				if (msg.params[1] === mask) {
-					return l;
-				}
-				break;
-			}
-		}).finally(() => {
-			this.whoxQueries.delete(token);
+			}).finally(() => {
+				this.whoxQueries.delete(token);
+			});
 		});
+		this.pendingCmds.WHO = promise.catch(() => {});
+		return promise;
 	}
 
 	parseWhoReply(msg) {
@@ -424,6 +564,10 @@ export default class Client extends EventTarget {
 				who[k] = msg.params[2 + i];
 				i++;
 			});
+			if (who.account === "0") {
+				// WHOX uses "0" to mean "no account"
+				who.account = null;
+			}
 			return who;
 		default:
 			throw new Error("Not a WHO reply: " + msg.command);
@@ -439,146 +583,120 @@ export default class Client extends EventTarget {
 			case irc.RPL_ENDOFWHOIS:
 				nick = msg.params[1];
 				if (this.cm(nick) === targetCM) {
-					return this.whoisDB.get(nick);
+					let whois = {};
+					msg.list.forEach((reply) => {
+						whois[reply.command] = reply;
+					});
+					return whois;
 				}
 				break;
 			case irc.ERR_NOSUCHNICK:
 				nick = msg.params[1];
 				if (this.cm(nick) === targetCM) {
-					throw msg;
+					throw new IRCError(msg);
 				}
 				break;
 			}
 		});
 	}
 
-	addAvailableCaps(s) {
-		let l = s.split(" ");
-		l.forEach((s) => {
-			let i = s.indexOf("=");
-			let k = s, v = "";
-			if (i >= 0) {
-				k = s.slice(0, i);
-				v = s.slice(i + 1);
-			}
-			this.availableCaps[k.toLowerCase()] = v;
-		});
-	}
-
 	supportsSASL(mech) {
-		let saslCap = this.availableCaps["sasl"];
+		let saslCap = this.caps.available.get("sasl");
 		if (saslCap === undefined) {
 			return false;
 		}
 		return saslCap.split(",").includes(mech);
 	}
 
-	requestCaps(extra) {
-		let reqCaps = extra || [];
+	checkAccountRegistrationCap(k) {
+		let v = this.caps.available.get("draft/account-registration");
+		if (v === undefined) {
+			return false;
+		}
+		return v.split(",").includes(k);
+	}
 
-		permanentCaps.forEach((cap) => {
-			if (this.availableCaps[cap] !== undefined && !this.enabledCaps[cap]) {
-				reqCaps.push(cap);
-			}
-		});
+	requestCaps() {
+		let wantCaps = [].concat(permanentCaps);
+		if (!this.params.bouncerNetwork) {
+			wantCaps.push("soju.im/bouncer-networks-notify");
+		}
 
-		if (reqCaps.length > 0) {
-			this.send({ command: "CAP", params: ["REQ", reqCaps.join(" ")] });
+		let msg = this.caps.requestAvailable(wantCaps);
+		if (msg) {
+			this.send(msg);
 		}
 	}
 
 	handleCap(msg) {
+		this.caps.parse(msg);
+
 		let subCmd = msg.params[1];
 		let args = msg.params.slice(2);
 		switch (subCmd) {
 		case "LS":
-			this.addAvailableCaps(args[args.length - 1]);
-			if (args[0] != "*") {
-				console.log("Available server caps:", this.availableCaps);
+			this.supportsCap = true;
+			if (args[0] == "*") {
+				break;
+			}
 
-				let reqCaps = [];
-				let capEnd = true;
-				if (this.params.saslPlain && this.supportsSASL("PLAIN")) {
-					// CAP END is deferred after authentication finishes
-					reqCaps.push("sasl");
-					capEnd = false;
+			console.log("Available server caps:", this.caps.available);
+
+			this.requestCaps();
+
+			if (this.status !== Client.Status.REGISTERED) {
+				if (this.caps.available.has("sasl")) {
+					let promise;
+					if (this.params.saslPlain) {
+						promise = this.authenticate("PLAIN", this.params.saslPlain);
+					} else if (this.params.saslExternal) {
+						promise = this.authenticate("EXTERNAL");
+					}
+					(promise || Promise.resolve()).catch((err) => {
+						this.dispatchError(err);
+						this.disconnect();
+					});
 				}
 
-				if (!this.params.bouncerNetwork && this.availableCaps["soju.im/bouncer-networks-notify"] !== undefined) {
-					reqCaps.push("soju.im/bouncer-networks-notify");
+				if (this.caps.available.has("soju.im/bouncer-networks") && this.params.bouncerNetwork) {
+					this.send({ command: "BOUNCER", params: ["BIND", this.params.bouncerNetwork] });
 				}
 
-				this.requestCaps(reqCaps);
-
-				if (this.status != Client.Status.REGISTERED && capEnd) {
-					this.send({ command: "CAP", params: ["END"] });
-				}
+				this.send({ command: "CAP", params: ["END"] });
 			}
 			break;
 		case "NEW":
-			this.addAvailableCaps(args[0]);
 			console.log("Server added available caps:", args[0]);
 			this.requestCaps();
 			break;
 		case "DEL":
-			args[0].split(" ").forEach((cap) => {
-				cap = cap.toLowerCase();
-				delete this.availableCaps[cap];
-				delete this.enabledCaps[cap];
-			});
 			console.log("Server removed available caps:", args[0]);
 			break;
 		case "ACK":
 			console.log("Server ack'ed caps:", args[0]);
-			args[0].split(" ").forEach((cap) => {
-				cap = cap.toLowerCase();
-				this.enabledCaps[cap] = true;
-
-				if (cap == "sasl" && this.params.saslPlain) {
-					console.log("Starting SASL PLAIN authentication");
-					this.send({ command: "AUTHENTICATE", params: ["PLAIN"] });
-				}
-			});
 			break;
 		case "NAK":
 			console.log("Server nak'ed caps:", args[0]);
-			if (this.status != Client.Status.REGISTERED) {
+			if (this.status !== Client.Status.REGISTERED) {
 				this.send({ command: "CAP", params: ["END"] });
 			}
 			break;
 		}
 	}
 
-	handleAuthenticate(msg) {
-		let challengeStr = msg.params[0];
-
-		// For now only PLAIN is supported
-		if (challengeStr != "+") {
-			this.dispatchEvent(new CustomEvent("error", { detail: "Expected an empty challenge, got: " + challengeStr }));
-			this.send({ command: "AUTHENTICATE", params: ["*"] });
-			return;
-		}
-
-		let respStr = btoa("\0" + this.params.saslPlain.username + "\0" + this.params.saslPlain.password);
-		this.send({ command: "AUTHENTICATE", params: [respStr] });
-	}
-
 	send(msg) {
 		if (!this.ws) {
 			throw new Error("Failed to send IRC message " + msg.command + ": socket is closed");
 		}
 		this.ws.send(irc.formatMessage(msg));
-		console.debug("Sent:", msg);
+		if (this.debug) {
+			console.debug("Sent:", msg);
+		}
 	}
 
-	setCaseMapping(name) {
-		this.cm = irc.CaseMapping.byName(name);
-		if (!this.cm) {
-			console.error("Unsupported case-mapping '" + name + "', falling back to RFC 1459");
-			this.cm = irc.CaseMapping.RFC1459;
-		}
-
-		this.whoisDB = new irc.CaseMapMap(this.whoisDB, this.cm);
+	updateCaseMapping() {
+		this.cm = this.isupport.caseMapping();
+		this.pendingLists = new irc.CaseMapMap(this.pendingLists, this.cm);
 		this.monitored = new irc.CaseMapMap(this.monitored, this.cm);
 	}
 
@@ -591,7 +709,7 @@ export default class Client extends EventTarget {
 	}
 
 	isChannel(name) {
-		let chanTypes = this.isupport.get("CHANTYPES") || irc.STD_CHANTYPES;
+		let chanTypes = this.isupport.chanTypes();
 		return chanTypes.indexOf(name[0]) >= 0;
 	}
 
@@ -613,8 +731,10 @@ export default class Client extends EventTarget {
 	/* Execute a command that expects a response. `done` is called with message
 	 * events until it returns a truthy value. */
 	roundtrip(msg, done) {
+		let cmd = msg.command;
+
 		let label;
-		if (this.enabledCaps["labeled-response"]) {
+		if (this.caps.enabled.has("labeled-response")) {
 			lastLabel++;
 			label = String(lastLabel);
 			msg.tags = { ...msg.tags, label };
@@ -631,6 +751,24 @@ export default class Client extends EventTarget {
 					return;
 				}
 
+				let isError = false;
+				switch (msg.command) {
+				case "FAIL":
+					isError = msg.params[0] === cmd;
+					break;
+				case irc.ERR_UNKNOWNERROR:
+				case irc.ERR_UNKNOWNCOMMAND:
+				case irc.ERR_NEEDMOREPARAMS:
+				case irc.RPL_TRYAGAIN:
+					isError = msg.params[1] === cmd;
+					break;
+				}
+				if (isError) {
+					removeEventListeners();
+					reject(new IRCError(msg));
+					return;
+				}
+
 				let result;
 				try {
 					result = done(msg);
@@ -664,9 +802,36 @@ export default class Client extends EventTarget {
 		});
 	}
 
+	join(channel) {
+		let msg = {
+			command: "JOIN",
+			params: [channel],
+		};
+		return this.roundtrip(msg, (msg) => {
+			switch (msg.command) {
+			case irc.ERR_NOSUCHCHANNEL:
+			case irc.ERR_TOOMANYCHANNELS:
+			case irc.ERR_BADCHANNELKEY:
+			case irc.ERR_BANNEDFROMCHAN:
+			case irc.ERR_CHANNELISFULL:
+			case irc.ERR_INVITEONLYCHAN:
+				if (this.cm(msg.params[1]) === this.cm(channel)) {
+					throw new IRCError(msg);
+				}
+				break;
+			case "JOIN":
+				if (this.isMyNick(msg.prefix.name) && this.cm(msg.params[0]) === this.cm(channel)) {
+					return true;
+				}
+				break;
+			}
+		});
+	}
+
 	fetchBatch(msg, batchType) {
 		let batchName = null;
 		let messages = [];
+		let cmd = msg.command;
 		return this.roundtrip(msg, (msg) => {
 			if (batchName) {
 				let batch = msg.batch;
@@ -679,23 +844,18 @@ export default class Client extends EventTarget {
 				}
 			}
 
-			switch (msg.command) {
-			case "BATCH":
-				let enter = msg.params[0].startsWith("+");
-				let name = msg.params[0].slice(1);
-				if (enter && msg.params[1] === batchType) {
-					batchName = name;
-					break;
-				}
-				if (!enter && name === batchName) {
-					return { ...this.batches.get(name), messages };
-				}
-				break;
-			case "FAIL":
-				if (msg.params[0] === msg.command) {
-					throw msg;
-				}
-				break;
+			if (msg.command !== "BATCH") {
+				return;
+			}
+
+			let enter = msg.params[0].startsWith("+");
+			let name = msg.params[0].slice(1);
+			if (enter && msg.params[1] === batchType) {
+				batchName = name;
+				return;
+			}
+			if (!enter && name === batchName) {
+				return { ...this.batches.get(name), messages };
 			}
 		});
 	}
@@ -703,29 +863,20 @@ export default class Client extends EventTarget {
 	roundtripChatHistory(params) {
 		// Don't send multiple CHATHISTORY commands in parallel, we can't
 		// properly handle batches and errors.
-		this.pendingHistory = this.pendingHistory.catch(() => {}).then(() => {
+		let promise = this.pendingCmds.CHATHISTORY.then(() => {
 			let msg = {
 				command: "CHATHISTORY",
 				params,
 			};
 			return this.fetchBatch(msg, "chathistory").then((batch) => batch.messages);
 		});
-		return this.pendingHistory;
-	}
-
-	chatHistoryPageSize() {
-		if (this.isupport.has("CHATHISTORY")) {
-			let pageSize = parseInt(this.isupport.get("CHATHISTORY"), 10);
-			if (pageSize > 0) {
-				return pageSize;
-			}
-		}
-		return 100;
+		this.pendingCmds.CHATHISTORY = promise.catch(() => {});
+		return promise;
 	}
 
 	/* Fetch one page of history before the given date. */
 	fetchHistoryBefore(target, before, limit) {
-		let max = Math.min(limit, this.chatHistoryPageSize());
+		let max = Math.min(limit, this.isupport.chatHistory());
 		let params = ["BEFORE", target, "timestamp=" + before, max];
 		return this.roundtripChatHistory(params).then((messages) => {
 			return { more: messages.length >= max };
@@ -734,7 +885,7 @@ export default class Client extends EventTarget {
 
 	/* Fetch history in ascending order. */
 	fetchHistoryBetween(target, after, before, limit) {
-		let max = Math.min(limit, this.chatHistoryPageSize());
+		let max = Math.min(limit, this.isupport.chatHistory());
 		let params = ["AFTER", target, "timestamp=" + after.time, max];
 		return this.roundtripChatHistory(params).then((messages) => {
 			limit -= messages.length;
@@ -769,10 +920,6 @@ export default class Client extends EventTarget {
 	}
 
 	listBouncerNetworks() {
-		if (!this.enabledCaps["soju.im/bouncer-networks"]) {
-			return Promise.reject(new Error("Server doesn't support the BOUNCER extension"));
-		}
-
 		let req = { command: "BOUNCER", params: ["LISTNETWORKS"] };
 		return this.fetchBatch(req, "soju.im/bouncer-networks").then((batch) => {
 			let networks = new Map();
@@ -786,13 +933,6 @@ export default class Client extends EventTarget {
 		});
 	}
 
-	maxMonitorTargets() {
-		if (!this.isupport.has("MONITOR")) {
-			return 0;
-		}
-		return parseInt(this.isupport.get("MONITOR"), 10);
-	}
-
 	monitor(target) {
 		if (this.monitored.has(target)) {
 			return;
@@ -801,7 +941,7 @@ export default class Client extends EventTarget {
 		this.monitored.set(target, true);
 
 		// TODO: add poll-based fallback when MONITOR is not supported
-		if (this.monitored.size + 1 > this.maxMonitorTargets()) {
+		if (this.monitored.size + 1 > this.isupport.monitor()) {
 			return;
 		}
 
@@ -815,10 +955,53 @@ export default class Client extends EventTarget {
 
 		this.monitored.delete(target);
 
-		if (!this.isupport.has("MONITOR")) {
+		if (this.isupport.monitor() <= 0) {
 			return;
 		}
 
 		this.send({ command: "MONITOR", params: ["-", target] });
 	}
+
+	createBouncerNetwork(attrs) {
+		let msg = {
+			command: "BOUNCER",
+			params: ["ADDNETWORK", irc.formatTags(attrs)],
+		};
+		return this.roundtrip(msg, (msg) => {
+			if (msg.command === "BOUNCER" && msg.params[0] === "ADDNETWORK") {
+				return msg.params[1];
+			}
+		});
+	}
+
+	registerAccount(email, password) {
+		let msg = {
+			command: "REGISTER",
+			params: ["*", email || "*", password],
+		};
+		return this.roundtrip(msg, (msg) => {
+			if (msg.command !== "REGISTER") {
+				return;
+			}
+			let result = msg.params[0];
+			return {
+				verificationRequired: result === "VERIFICATION_REQUIRED",
+				account: msg.params[1],
+				message: msg.params[2],
+			};
+		});
+	}
+
+	verifyAccount(account, code) {
+		let msg = {
+			command: "VERIFY",
+			params: [account, code],
+		};
+		return this.roundtrip(msg, (msg) => {
+			if (msg.command !== "VERIFY") {
+				return;
+			}
+			return { message: msg.params[2] };
+		});
+	}
 }

lib/index.js

@@ -4,5 +4,5 @@ import { h } from "../node_modules/preact/dist/preact.module.js";
 import htm from "../node_modules/htm/dist/htm.module.js";
 export const html = htm.bind(h);
 
-import "../node_modules/anchorme/dist/browser/anchorme.min.js";
-export const anchorme = window.anchorme;
+import * as linkifyjs from "../node_modules/linkifyjs/dist/linkify.module.js";
+export { linkifyjs };

lib/irc.js

@@ -4,6 +4,9 @@ export const RPL_YOURHOST = "002";
 export const RPL_CREATED = "003";
 export const RPL_MYINFO = "004";
 export const RPL_ISUPPORT = "005";
+export const RPL_UMODEIS = "221";
+export const RPL_TRYAGAIN = "263";
+export const RPL_AWAY = "301";
 export const RPL_WHOISUSER = "311";
 export const RPL_WHOISSERVER = "312";
 export const RPL_WHOISOPERATOR = "313";
@@ -12,7 +15,6 @@ export const RPL_ENDOFWHOIS = "318";
 export const RPL_WHOISCHANNELS = "319";
 export const RPL_ENDOFWHO = "315";
 export const RPL_CHANNELMODEIS = "324";
-export const RPL_CREATIONTIME = "329";
 export const RPL_NOTOPIC = "331";
 export const RPL_TOPIC = "332";
 export const RPL_TOPICWHOTIME = "333";
@@ -30,17 +32,27 @@ export const RPL_ENDOFBANLIST = "368";
 export const RPL_MOTD = "372";
 export const RPL_MOTDSTART = "375";
 export const RPL_ENDOFMOTD = "376";
+export const ERR_UNKNOWNERROR = "400";
 export const ERR_NOSUCHNICK = "401";
+export const ERR_NOSUCHCHANNEL = "403";
+export const ERR_TOOMANYCHANNELS = "405";
+export const ERR_UNKNOWNCOMMAND = "421";
 export const ERR_NOMOTD = "422";
 export const ERR_ERRONEUSNICKNAME = "432";
 export const ERR_NICKNAMEINUSE = "433";
 export const ERR_NICKCOLLISION = "436";
+export const ERR_NEEDMOREPARAMS = "461";
 export const ERR_NOPERMFORHOST = "463";
 export const ERR_PASSWDMISMATCH = "464";
 export const ERR_YOUREBANNEDCREEP = "465";
+export const ERR_CHANNELISFULL = "471";
+export const ERR_INVITEONLYCHAN = "473";
+export const ERR_BANNEDFROMCHAN = "474";
+export const ERR_BADCHANNELKEY = "475";
 // RFC 2812
 export const ERR_UNAVAILRESOURCE = "437";
 // Other
+export const RPL_CREATIONTIME = "329";
 export const RPL_QUIETLIST = "728";
 export const RPL_ENDOFQUIETLIST = "729";
 // IRCv3 MONITOR: https://ircv3.net/specs/extensions/monitor
@@ -121,32 +133,32 @@ export function parsePrefix(s) {
 		host: null,
 	};
 
+	let host = null;
 	let i = s.indexOf("@");
-	if (i < 0) {
-		prefix.name = s;
-		return prefix;
+	if (i > 0) {
+		host = s.slice(i + 1);
+		s = s.slice(0, i);
 	}
-	prefix.host = s.slice(i + 1);
-	s = s.slice(0, i);
 
+	let user = null;
 	i = s.indexOf("!");
-	if (i < 0) {
-		prefix.name = s;
-		return prefix;
+	if (i > 0) {
+		user = s.slice(i + 1);
+		s = s.slice(0, i);
 	}
-	prefix.name = s.slice(0, i);
-	prefix.user = s.slice(i + 1);
-	return prefix;
+
+	return { name: s, user, host };
 }
 
 function formatPrefix(prefix) {
-	if (!prefix.host) {
-		return prefix.name;
+	let s = prefix.name;
+	if (prefix.user) {
+		s += "!" + prefix.user;
 	}
-	if (!prefix.user) {
-		return prefix.name + "@" + prefix.host;
+	if (prefix.host) {
+		s += "@" + prefix.host;
 	}
-	return prefix.name + "!" + prefix.user + "@" + prefix.host;
+	return s;
 }
 
 export function parseMessage(s) {
@@ -363,28 +375,95 @@ export function parseCTCP(msg) {
 	return ctcp;
 }
 
-export function parseISUPPORT(tokens, params) {
-	let changed = [];
-	tokens.forEach((tok) => {
-		if (tok.startsWith("-")) {
-			let k = tok.slice(1);
-			params.delete(k.toUpperCase());
-			return;
-		}
-
-		let i = tok.indexOf("=");
-		let k = tok, v = "";
-		if (i >= 0) {
-			k = tok.slice(0, i);
-			v = tok.slice(i + 1);
-		}
-
-		k = k.toUpperCase();
-
-		params.set(k, v);
-		changed.push(k);
+function unescapeISUPPORTValue(s) {
+	return s.replace(/\\x[0-9A-Z]{2}/gi, (esc) => {
+		let hex = esc.slice(2);
+		return String.fromCharCode(parseInt(hex, 16));
 	});
-	return changed;
+}
+
+export class Isupport {
+	raw = new Map();
+
+	parse(tokens) {
+		tokens.forEach((tok) => {
+			if (tok.startsWith("-")) {
+				let k = tok.slice(1);
+				this.raw.delete(k.toUpperCase());
+				return;
+			}
+
+			let i = tok.indexOf("=");
+			let k = tok, v = "";
+			if (i >= 0) {
+				k = tok.slice(0, i);
+				v = unescapeISUPPORTValue(tok.slice(i + 1));
+			}
+
+			k = k.toUpperCase();
+
+			this.raw.set(k, v);
+		});
+	}
+
+	caseMapping() {
+		let name = this.raw.get("CASEMAPPING");
+		if (!name) {
+			return CaseMapping.RFC1459;
+		}
+		let cm = CaseMapping.byName(name);
+		if (!cm) {
+			console.error("Unsupported case-mapping '" + name + "', falling back to RFC 1459");
+			return CaseMapping.RFC1459;
+		}
+		return cm;
+	}
+
+	monitor() {
+		if (!this.raw.has("MONITOR")) {
+			return 0;
+		}
+		let v = this.raw.get("MONITOR");
+		if (v === "") {
+			return Infinity;
+		}
+		return parseInt(v, 10);
+	}
+
+	whox() {
+		return this.raw.has("WHOX");
+	}
+
+	prefix() {
+		return this.raw.get("PREFIX") || "";
+	}
+
+	chanTypes() {
+		return this.raw.get("CHANTYPES") || STD_CHANTYPES;
+	}
+
+	statusMsg() {
+		return this.raw.get("STATUSMSG");
+	}
+
+	network() {
+		return this.raw.get("NETWORK");
+	}
+
+	chatHistory() {
+		if (!this.raw.has("CHATHISTORY")) {
+			return 0;
+		}
+		let n = parseInt(this.raw.get("CHATHISTORY"), 10);
+		if (n <= 0) {
+			return Infinity;
+		}
+		return n;
+	}
+
+	bouncerNetID() {
+		return this.raw.get("BOUNCER_NETID");
+	}
 }
 
 export const CaseMapping = {
@@ -593,8 +672,8 @@ export function getMessageLabel(msg) {
 }
 
 export function forEachChannelModeUpdate(msg, isupport, callback) {
-	let chanmodes = isupport.get("CHANMODES") || STD_CHANMODES;
-	let prefix = isupport.get("PREFIX") || "";
+	let chanmodes = isupport.chanModes();
+	let prefix = isupport.prefix();
 
 	let typeByMode = new Map();
 	let [a, b, c, d] = chanmodes.split(",");
@@ -640,6 +719,8 @@ export function forEachChannelModeUpdate(msg, isupport, callback) {
 }
 
 /**
+ * Check if a realname is worth displaying.
+ *
  * Since the realname is mandatory, many clients set a meaningless realname.
  */
 export function isMeaningfulRealname(realname, nick) {
@@ -647,7 +728,7 @@ export function isMeaningfulRealname(realname, nick) {
 		return false;
 	}
 
-	if (realname.toLowerCase() === "realname") {
+	if (realname.toLowerCase() === "realname" || realname.toLowerCase() === "unknown" || realname.toLowerCase() === "fullname") {
 		return false;
 	}
 
@@ -655,3 +736,125 @@ export function isMeaningfulRealname(realname, nick) {
 
 	return true;
 }
+
+/* Parse an irc:// URL.
+ *
+ * See: https://datatracker.ietf.org/doc/html/draft-butcher-irc-url-04
+ */
+export function parseURL(str) {
+	if (!str.startsWith("irc://") && !str.startsWith("ircs://")) {
+		return null;
+	}
+
+	str = str.slice(str.indexOf(":") + "://".length);
+
+	let loc;
+	let i = str.indexOf("/");
+	if (i < 0) {
+		loc = str;
+		str = "";
+	} else {
+		loc = str.slice(0, i);
+		str = str.slice(i + 1);
+	}
+
+	let host = loc;
+	i = loc.indexOf("@");
+	if (i >= 0) {
+		host = loc.slice(i + 1);
+		// TODO: parse authinfo
+	}
+
+	i = str.indexOf("?");
+	if (i >= 0) {
+		str = str.slice(0, i);
+		// TODO: parse options
+	}
+
+	let enttype;
+	i = str.indexOf(",");
+	if (i >= 0) {
+		let flags = str.slice(i + 1).split(",");
+		str = str.slice(0, i);
+
+		if (flags.indexOf("isuser") >= 0) {
+			enttype = "user";
+		} else if (flags.indexOf("ischannel") >= 0) {
+			enttype = "channel";
+		}
+
+		// TODO: parse hosttype
+	}
+
+	let entity = decodeURIComponent(str);
+	if (!enttype) {
+		// TODO: technically we should use the PREFIX ISUPPORT here
+		enttype = entity.startsWith("#") ? "channel" : "user";
+	}
+
+	return { host, enttype, entity };
+}
+
+export class CapRegistry {
+	available = new Map();
+	enabled = new Set();
+
+	addAvailable(s) {
+		let l = s.split(" ");
+		l.forEach((s) => {
+			let i = s.indexOf("=");
+			let k = s, v = "";
+			if (i >= 0) {
+				k = s.slice(0, i);
+				v = s.slice(i + 1);
+			}
+			this.available.set(k.toLowerCase(), v);
+		});
+	}
+
+	parse(msg) {
+		if (msg.command !== "CAP") {
+			return;
+		}
+
+		let subCmd = msg.params[1];
+		let args = msg.params.slice(2);
+		switch (subCmd) {
+		case "LS":
+			this.addAvailable(args[args.length - 1]);
+			break;
+		case "NEW":
+			this.addAvailable(args[0]);
+			break;
+		case "DEL":
+			args[0].split(" ").forEach((cap) => {
+				cap = cap.toLowerCase();
+				this.available.delete(cap);
+				this.enabled.delete(cap);
+			});
+			break;
+		case "ACK":
+			// TODO: handle `ACK -cap` to
+			args[0].split(" ").forEach((cap) => {
+				cap = cap.toLowerCase();
+				if (cap.startsWith("-")) {
+					this.enabled.delete(cap.slice(1));
+				} else {
+					this.enabled.add(cap);
+				}
+			});
+			break;
+		}
+	}
+
+	requestAvailable(l) {
+		l = l.filter((cap) => {
+			return this.available.has(cap) && !this.enabled.has(cap);
+		});
+
+		if (l.length === 0) {
+			return null;
+		}
+		return { command: "CAP", params: ["REQ", l.join(" ")] };
+	}
+}

lib/linkify.js

@@ -1,65 +1,68 @@
-import { anchorme, html } from "./index.js";
+import { linkifyjs, html } from "./index.js";
 
-function linkifyChannel(text, transformChannel) {
-	// Don't match punctuation at the end of the channel name
-	const channelRegex = /(^|\s)(#[^\s]+[^\s.?!…():;,])/gi;
+linkifyjs.options.defaults.defaultProtocol = "https";
 
-	let children = [];
-	let match;
-	let last = 0;
-	while ((match = channelRegex.exec(text)) !== null) {
-		let channel = match[2];
-		let start = match.index + match[1].length;
-		let end = start + match[2].length;
+linkifyjs.registerCustomProtocol("irc");
+linkifyjs.registerCustomProtocol("ircs");
 
-		children.push(text.substring(last, start));
-		children.push(transformChannel(channel));
+linkifyjs.registerPlugin("ircChannel", ({ scanner, parser, utils }) => {
+	const { POUND, DOMAIN, TLD, LOCALHOST, UNDERSCORE, DOT, HYPHEN } = scanner.tokens;
+	const START_STATE = parser.start;
 
-		last = end;
-	}
-	children.push(text.substring(last));
+	const Channel = utils.createTokenClass("ircChannel", {
+		isLink: true,
+		toHref() {
+			return "irc:///" + this.toString();
+		},
+	});
 
-	return children;
-}
+	const HASH_STATE = START_STATE.tt(POUND);
 
-export default function linkify(text, onChannelClick) {
-	function transformChannel(channel) {
-		function onClick(event) {
-			event.preventDefault();
-			onChannelClick(channel);
-		}
-		return html`
-			<a
-				href="irc:///${encodeURIComponent(channel)}"
-				onClick=${onClick}
-			>${channel}</a>`;
-	}
+	const CHAN_STATE = HASH_STATE.tt(DOMAIN, Channel);
+	HASH_STATE.tt(TLD, CHAN_STATE);
+	HASH_STATE.tt(LOCALHOST, CHAN_STATE);
+	HASH_STATE.tt(POUND, CHAN_STATE);
 
-	let links = anchorme.list(text);
+	CHAN_STATE.tt(UNDERSCORE, CHAN_STATE);
+	CHAN_STATE.tt(DOMAIN, CHAN_STATE);
+	CHAN_STATE.tt(TLD, CHAN_STATE);
+	CHAN_STATE.tt(LOCALHOST, CHAN_STATE);
+
+	const CHAN_DIVIDER_STATE = CHAN_STATE.tt(DOT);
+
+	CHAN_DIVIDER_STATE.tt(UNDERSCORE, CHAN_STATE);
+	CHAN_DIVIDER_STATE.tt(DOMAIN, CHAN_STATE);
+	CHAN_DIVIDER_STATE.tt(TLD, CHAN_STATE);
+	CHAN_DIVIDER_STATE.tt(LOCALHOST, CHAN_STATE);
+});
+
+export default function linkify(text, onClick) {
+	let links = linkifyjs.find(text);
 
 	let children = [];
 	let last = 0;
 	links.forEach((match) => {
+		if (!match.isLink) {
+			return;
+		}
+
 		const prefix = text.substring(last, match.start)
-		children.push(...linkifyChannel(prefix, transformChannel));
+		children.push(prefix);
 
-		let proto = match.protocol || "https://";
-		if (match.isEmail) {
-			proto = "mailto:";
-		}
-
-		let url = match.string;
-		if (!url.startsWith(proto)) {
-			url = proto + url;
-		}
-
-		children.push(html`<a href=${url} target="_blank" rel="noreferrer noopener">${match.string}</a>`);
+		children.push(html`
+			<a
+				href=${match.href}
+				target="_blank"
+				rel="noreferrer noopener"
+				onClick=${onClick}
+			>${match.value}</a>
+		`);
 
 		last = match.end;
 	});
 
 	const suffix = text.substring(last)
-	children.push(...linkifyChannel(suffix, transformChannel));
+	children.push(suffix);
 
 	return children;
 }

main.js

@@ -0,0 +1,4 @@
+import { html, render } from "./lib/index.js";
+import App from "./components/app.js";
+
+render(html`<${App}/>`, document.body);

package.json

@@ -1,15 +1,28 @@
 {
   "name": "gamja",
+  "type": "module",
   "dependencies": {
-    "anchorme": "^2.1.2",
     "htm": "^3.0.4",
+    "linkifyjs": "^3.0.2",
     "preact": "^10.5.9"
   },
   "devDependencies": {
-    "http-server": "^13.0.2"
+    "@parcel/packager-raw-url": "^2.0.0",
+    "@parcel/transformer-webmanifest": "^2.0.0",
+    "node-static": "^0.7.11",
+    "parcel": "^2.0.0",
+    "split": "^1.0.1",
+    "ws": "^8.3.0"
   },
   "scripts": {
-    "start": "http-server ."
+    "start": "node ./dev-server.js",
+    "build": "parcel build"
   },
-  "private": true
+  "private": true,
+  "targets": {
+    "default": {
+      "source": "index.html",
+      "publicUrl": "."
+    }
+  }
 }

state.js

@@ -63,20 +63,26 @@ export function getMessageURL(buf, msg) {
 	}
 }
 
-export function getServerName(server, bouncerNetwork, isBouncer) {
-	if (bouncerNetwork && bouncerNetwork.name) {
+export function getServerName(server, bouncerNetwork) {
+	let netName = server.name;
+
+	if (bouncerNetwork && bouncerNetwork.name && bouncerNetwork.name !== bouncerNetwork.host) {
+		// User has picked a custom name for the network, use that
 		return bouncerNetwork.name;
 	}
-	if (isBouncer) {
-		return "bouncer";
-	}
 
-	let netName = server.isupport.get("NETWORK");
 	if (netName) {
+		// Server has specified a name
 		return netName;
 	}
 
-	return "server";
+	if (bouncerNetwork) {
+		return bouncerNetwork.name || bouncerNetwork.host || "server";
+	} else if (server.isBouncer) {
+		return "bouncer";
+	} else {
+		return "server";
+	}
 }
 
 function updateState(state, updater) {
@@ -112,7 +118,7 @@ function compareBuffers(a, b) {
 }
 
 function updateMembership(membership, letter, add, client) {
-	let prefix = client.isupport.get("PREFIX") || "";
+	let prefix = client.isupport.prefix();
 
 	let prefixPrivs = new Map(irc.parseMembershipModes(prefix).map((membership, i) => {
 		return [membership.prefix, i];
@@ -137,7 +143,7 @@ function updateMembership(membership, letter, add, client) {
 function insertMessage(list, msg) {
 	if (list.length == 0) {
 		return [msg];
-	} else if (list[list.length - 1].tags.time <= msg.tags.time) {
+	} else if (!irc.findBatchByType(msg, "chathistory") || list[list.length - 1].tags.time <= msg.tags.time) {
 		return list.concat(msg);
 	}
 
@@ -225,7 +231,7 @@ export const State = {
 			let cm = irc.CaseMapping.RFC1459;
 			let server = state.servers.get(serverID);
 			if (server) {
-				cm = irc.CaseMapping.byName(server.isupport.get("CASEMAPPING")) || cm;
+				cm = server.cm;
 			}
 
 			let nameCM = cm(name);
@@ -246,9 +252,17 @@ export const State = {
 		let servers = new Map(state.servers);
 		servers.set(id, {
 			id,
+			name: null, // from ISUPPORT NETWORK
 			status: ServerStatus.DISCONNECTED,
-			isupport: new Map(),
+			cm: irc.CaseMapping.RFC1459,
 			users: new irc.CaseMapMap(null, irc.CaseMapping.RFC1459),
+			account: null,
+			supportsSASLPlain: false,
+			supportsAccountRegistration: false,
+			reliableUserAccounts: false,
+			statusMsg: null, // from ISUPPORT STATUSMSG
+			isBouncer: false,
+			bouncerNetID: null,
 		});
 		return [id, { servers }];
 	},
@@ -277,6 +291,7 @@ export const State = {
 			type,
 			server: serverID,
 			serverInfo: null, // if server
+			joined: false, // if channel
 			topic: null, // if channel
 			members: new irc.CaseMapMap(null, client.cm), // if channel
 			messages: [],
@@ -311,7 +326,7 @@ export const State = {
 			return;
 		}
 
-		let target, channel, topic, targets, who;
+		let target, channel, topic, targets, who, update, buffers;
 		switch (msg.command) {
 		case irc.RPL_MYINFO:
 			// TODO: parse available modes
@@ -321,7 +336,7 @@ export const State = {
 			};
 			return updateBuffer(SERVER_BUFFER, { serverInfo });
 		case irc.RPL_ISUPPORT:
-			let buffers = new Map(state.buffers);
+			buffers = new Map(state.buffers);
 			state.buffers.forEach((buf) => {
 				if (buf.server != serverID) {
 					return;
@@ -333,11 +348,31 @@ export const State = {
 				buffers,
 				...updateServer((server) => {
 					return {
-						isupport: new Map(client.isupport),
+						name: client.isupport.network(),
+						cm: client.cm,
 						users: new irc.CaseMapMap(server.users, client.cm),
+						reliableUserAccounts: client.isupport.monitor() > 0 && client.isupport.whox(),
+						statusMsg: client.isupport.statusMsg(),
+						bouncerNetID: client.isupport.bouncerNetID(),
 					};
 				}),
 			};
+		case "CAP":
+			return updateServer({
+				supportsSASLPlain: client.supportsSASL("PLAIN"),
+				supportsAccountRegistration: client.caps.enabled.has("draft/account-registration"),
+				isBouncer: client.caps.enabled.has("soju.im/bouncer-networks"),
+			});
+		case irc.RPL_LOGGEDIN:
+			return updateServer({ account: msg.params[2] });
+		case irc.RPL_LOGGEDOUT:
+			return updateServer({ account: null });
+		case "REGISTER":
+		case "VERIFY":
+			if (msg.params[0] === "SUCCESS") {
+				return updateServer({ account: msg.params[1] });
+			}
+			break;
 		case irc.RPL_NOTOPIC:
 			channel = msg.params[1];
 			return updateBuffer(channel, { topic: null });
@@ -348,19 +383,19 @@ export const State = {
 		case irc.RPL_TOPICWHOTIME:
 			// Ignore
 			break;
-		case irc.RPL_NAMREPLY:
-			channel = msg.params[2];
-			let membersList = msg.params[3].split(" ");
-
+		case irc.RPL_ENDOFNAMES:
+			channel = msg.params[1];
 			return updateBuffer(channel, (buf) => {
-				let members = new irc.CaseMapMap(buf.members);
-				membersList.forEach((s) => {
-					let member = irc.parseTargetPrefix(s);
-					members.set(member.name, member.prefix);
+				let members = new irc.CaseMapMap(null, buf.members.caseMap);
+				msg.list.forEach((namreply) => {
+					let membersList = namreply.params[3].split(" ");
+					membersList.forEach((s) => {
+						let member = irc.parseTargetPrefix(s);
+						members.set(member.name, member.prefix);
+					});
 				});
 				return { members };
 			});
-		case irc.RPL_ENDOFNAMES:
 			break;
 		case irc.RPL_WHOREPLY:
 		case irc.RPL_WHOSPCRPL:
@@ -368,6 +403,7 @@ export const State = {
 
 			if (who.flags !== undefined) {
 				who.away = who.flags.indexOf("G") >= 0; // H for here, G for gone
+				who.operator = who.flags.indexOf("*") >= 0;
 				delete who.flags;
 			}
 
@@ -376,14 +412,9 @@ export const State = {
 			return updateUser(who.nick, who);
 		case irc.RPL_ENDOFWHO:
 			target = msg.params[1];
-			if (!client.isChannel(target) && target.indexOf("*") < 0) {
+			if (msg.list.length == 0 && !client.isChannel(target) && target.indexOf("*") < 0) {
 				// Not a channel nor a mask, likely a nick
 				return updateUser(target, (user) => {
-					// TODO: mark user offline if we have old WHO info but this
-					// WHO reply is empty
-					if (user) {
-						return;
-					}
 					return { offline: true };
 				});
 			}
@@ -396,10 +427,13 @@ export const State = {
 				state = { ...state, ...update };
 			}
 
-			let update = updateBuffer(channel, (buf) => {
+			update = updateBuffer(channel, (buf) => {
 				let members = new irc.CaseMapMap(buf.members);
 				members.set(msg.prefix.name, "");
-				return { members };
+
+				let joined = buf.joined || client.isMyNick(msg.prefix.name);
+
+				return { members, joined };
 			});
 			state = { ...state, ...update };
 
@@ -427,7 +461,10 @@ export const State = {
 			return updateBuffer(channel, (buf) => {
 				let members = new irc.CaseMapMap(buf.members);
 				members.delete(msg.prefix.name);
-				return { members };
+
+				let joined = buf.joined && !client.isMyNick(msg.prefix.name);
+
+				return { members, joined };
 			});
 		case "KICK":
 			channel = msg.params[0];
@@ -436,18 +473,54 @@ export const State = {
 			return updateBuffer(channel, (buf) => {
 				let members = new irc.CaseMapMap(buf.members);
 				members.delete(nick);
-				return { members };
+
+				let joined = buf.joined && !client.isMyNick(nick);
+
+				return { members, joined };
 			});
 		case "QUIT":
-			return updateUser(msg.prefix.name, (user) => {
+			buffers = new Map(state.buffers);
+			state.buffers.forEach((buf) => {
+				if (buf.server != serverID) {
+					return;
+				}
+				if (!buf.members.has(msg.prefix.name)) {
+					return;
+				}
+				let members = new irc.CaseMapMap(buf.members);
+				members.delete(msg.prefix.name);
+				buffers.set(buf.id, { ...buf, members });
+			});
+			state = { ...state, buffers };
+
+			update = updateUser(msg.prefix.name, (user) => {
 				if (!user) {
 					return;
 				}
 				return { offline: true };
 			});
+			state = { ...state, ...update };
+
+			return state;
 		case "NICK":
 			let newNick = msg.params[0];
-			return updateServer((server) => {
+
+			buffers = new Map(state.buffers);
+			state.buffers.forEach((buf) => {
+				if (buf.server != serverID) {
+					return;
+				}
+				if (!buf.members.has(msg.prefix.name)) {
+					return;
+				}
+				let members = new irc.CaseMapMap(buf.members);
+				members.set(newNick, members.get(msg.prefix.name));
+				members.delete(msg.prefix.name);
+				buffers.set(buf.id, { ...buf, members });
+			});
+			state = { ...state, buffers };
+
+			update = updateServer((server) => {
 				let users = new irc.CaseMapMap(server.users);
 				let user = users.get(msg.prefix.name);
 				if (!user) {
@@ -457,6 +530,9 @@ export const State = {
 				users.delete(msg.prefix.name);
 				return { users };
 			});
+			state = { ...state, ...update };
+
+			return state;
 		case "SETNAME":
 			return updateUser(msg.prefix.name, { realname: msg.params[0] });
 		case "CHGHOST":
@@ -484,7 +560,7 @@ export const State = {
 				return; // TODO: handle user mode changes too
 			}
 
-			let prefix = client.isupport.get("PREFIX") || "";
+			let prefix = client.isupport.prefix();
 			let prefixByMode = new Map(irc.parseMembershipModes(prefix).map((membership) => {
 				return [membership.mode, membership.prefix];
 			}));

store.js

@@ -23,6 +23,7 @@ class Item {
 }
 
 export const autoconnect = new Item("autoconnect");
+export const naggedProtocolHandler = new Item("naggedProtocolHandler");
 
 const rawReceipts = new Item("receipts");
 

style.css

@@ -58,6 +58,13 @@ body {
 	font-family: monospace;
 }
 
+noscript {
+	display: block;
+	margin: 0 auto;
+	max-width: 600px;
+	grid-column-start: 2;
+}
+
 button {
 	background: var(--button-background);
 	transition: background 0.25s linear;
@@ -279,6 +286,9 @@ button.danger:hover {
 	padding: 2px 10px;
 	box-sizing: border-box;
 }
+#member-list li a.away {
+	color: var(--gray);
+}
 
 .membership.owner {
 	color: red;