From abece1e3fd3563c2b9c407b1559d0dae3e1d9fbd Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Mon, 29 Jun 2020 11:08:47 +0200
Subject: [PATCH] Detect highlights

---
 components/app.js |  7 ++++++-
 lib/irc.js        | 44 ++++++++++++++++++++++++++++++++++++++++++++
 state.js          |  2 ++
 style.css         |  3 +++
 4 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/components/app.js b/components/app.js
index bce9797..6cc82dc 100644
--- a/components/app.js
+++ b/components/app.js
@@ -168,7 +168,12 @@ export default class App extends Component {
 
 		var msgUnread = Unread.NONE;
 		if (msg.command == "PRIVMSG" || msg.command == "NOTICE") {
-			msgUnread = Unread.MESSAGE;
+			var text = msg.params[1];
+			if (msg.prefix.name != this.client.nick && irc.isHighlight(text, this.client.nick)) {
+				msgUnread = Unread.HIGHLIGHT;
+			} else {
+				msgUnread = Unread.MESSAGE;
+			}
 		}
 
 		if (msg.prefix.name != this.client.nick && msg.command != "PART") {
diff --git a/lib/irc.js b/lib/irc.js
index fab7e97..e7bac49 100644
--- a/lib/irc.js
+++ b/lib/irc.js
@@ -196,3 +196,47 @@ export function parseMembership(s) {
 		nick: s.slice(i),
 	};
 }
+
+const alphaNum = (() => {
+	try {
+		return new RegExp(/^\p{L}$/, "u");
+	} catch (e) {
+		return new RegExp(/^[a-zA-Z0-9]$/, "u");
+	}
+})();
+
+function isWordBoundary(ch) {
+	switch (ch) {
+	case "-":
+	case "_":
+	case "|":
+		return false;
+	case "\u00A0":
+		return true;
+	default:
+		return !alphaNum.test(ch);
+	}
+}
+
+export function isHighlight(text, nick) {
+	while (true) {
+		var i = text.indexOf(nick);
+		if (i < 0) {
+			return false;
+		}
+
+		// Detect word boundaries
+		var left = "\x00", right = "\x00";
+		if (i > 0) {
+			left = text[i - 1];
+		}
+		if (i < text.length) {
+			right = text[i + nick.length];
+		}
+		if (isWordBoundary(left) && isWordBoundary(right)) {
+			return true;
+		}
+
+		text = text.slice(i + nick.length);
+	}
+}
diff --git a/state.js b/state.js
index ee0f7b1..4ef6567 100644
--- a/state.js
+++ b/state.js
@@ -13,11 +13,13 @@ export const Status = {
 export const Unread = {
 	NONE: "",
 	MESSAGE: "message",
+	HIGHLIGHT: "highlight",
 
 	union: (a, b) => {
 		const priority = {
 			[Unread.None]: 0,
 			[Unread.MESSAGE]: 1,
+			[Unread.HIGHLIGHT]: 2,
 		};
 		return (priority[a] > priority[b]) ? a : b;
 	},
diff --git a/style.css b/style.css
index b531203..c68b710 100644
--- a/style.css
+++ b/style.css
@@ -46,6 +46,9 @@ body {
 #buffer-list li.unread-message a {
 	color: #b37400;
 }
+#buffer-list li.unread-highlight a {
+	color: #22009b;
+}
 #buffer-list .actions {
 	flex-shrink: 0;
 	text-align: center;