Handle click on irc:// channel URLs inside buffers

References: https://todo.sr.ht/~emersion/gamja/71

lib/irc.js

@@ -656,3 +656,27 @@ export function isMeaningfulRealname(realname, nick) {
 
 	return true;
 }
+
+export function parseURL(str) {
+	if (!str.startsWith("irc://") && !str.startsWith("ircs://")) {
+		return null;
+	}
+
+	str = str.slice(str.indexOf(":") + 3);
+
+	let i = str.indexOf("/");
+	if (i < 0) {
+		return null;
+	}
+
+	let host = str.slice(0, i);
+	str = str.slice(i + 1);
+
+	// TODO: handle URLs with query params
+	if (!str.startsWith("#")) {
+		return null;
+	}
+	let channel = str;
+
+	return { host, channel };
+}