feat: parse irc message

1 files changed, 69 insertions, 7 deletions

diff --git a/scripts/chat.js b/scripts/chat.js
index d26a4ba..a845b06 100644
--- a/scripts/chat.js
+++ b/scripts/chat.js
@@ -1,19 +1,81 @@
-function addMessage(author, message) {
+function parseIRCMessage(line) {
+  line = line.replace(/\r?\n$/, '');
+  let tags = {};
+  let prefix = null;
+  let nick = null;
+  let command = null;
+  const params = [];
+
+  // tags
+  if (line[0] === '@') {
+    const end = line.indexOf(' ');
+    const rawTags = line.slice(1, end);
+    for (const tag of rawTags.split(';')) {
+      const [k, v = true] = tag.split('=');
+      tags[k] = v === true ? true : v;
+    }
+    line = line.slice(end + 1);
+  }
+
+  // prefix
+  if (line[0] === ':') {
+    const end = line.indexOf(' ');
+    prefix = line.slice(1, end);
+    const bang = prefix.indexOf('!');
+    if (bang !== -1) nick = prefix.slice(0, bang);
+    line = line.slice(end + 1);
+  }
+
+  // command and params
+  const parts = line.split(' ');
+  command = parts.shift();
+  for (let i = 0; i < parts.length; i++) {
+    if (parts[i][0] === ':') {
+      params.push(parts.slice(i).join(' ').slice(1));
+      break;
+    }
+    if (parts[i].length) params.push(parts[i]);
+  }
+
+  return { tags, prefix, nick, command, params };
+}
+
+function addMessage(message) {
     const messages = document.getElementById("messages");
-    if (!messages) {
+    if (!messages || message.command != "PRIVMSG") {
         return;
     }
     
+    // msg base
     const elem = document.createElement("p");
     elem.classList.add("message");
     
-    elem.innerHTML = `<span class="author">${author}:</span> ${message}`;
+    // username
+    const usernameElem = document.createElement("span");
+    elem.append(usernameElem);
+    if ("color" in message.tags) {
+        usernameElem.style.color = message.tags["color"];
+    }
+    usernameElem.textContent = `${message.nick}:`;
+    
+    // message text
+    elem.innerHTML += ' ' + message.params[1];
     
     messages.append(elem);
     
     window.scrollTo(0, document.body.scrollHeight);
 }
 
+function addSystemMessage(message) {
+    addMessage({
+        "params": ["#", message],
+        "nick": "System",
+        "prefix": "system",
+        "tags": {},
+        "command": "PRIVMSG",
+    });
+}
+
 function connectToChat(host, nick, password, room) {
     const socket = new WebSocket(host);
     
@@ -22,7 +84,7 @@ function connectToChat(host, nick, password, room) {
         socket.send(`PASS ${password}`);
         socket.send("CAP REQ :twitch.tv/tags");
         socket.send(`JOIN #${room}`);
-        addMessage("Chat", "Connected!");
+        addSystemMessage("Connected to the chat!");
     });
     
     socket.addEventListener("message", (e) => {
@@ -33,13 +95,13 @@ function connectToChat(host, nick, password, room) {
             if (l.length == 0) {
                 continue;
             }
-            addMessage("Message", l);
+            addMessage(parseIRCMessage(l));
         }
     });
     
     socket.addEventListener("close", (e) => {
-        addMessage("Chat", `Disconnected: ${e.reason}`);
-        addMessage("Chat", "Reconnecting in 5 seconds...");
+        addMessage("Chat", `Disconnected from the chat: ${e.reason}`);
+        addMessage("Chat", "Reconnecting to the chat in 5 seconds...");
         setTimeout(() => connectToChat(host, nick, password, room), 5000);
     });
 }
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