From afe3b4df8c83cdc78cad027dcf56ab1c2aaa95b1 Mon Sep 17 00:00:00 2001
From: Andrea Lepori <alepori@student.ethz.ch>
Date: Sun, 19 Apr 2020 22:51:16 +0200
Subject: add bridge command to send messages with different nicks

---
 server/src/commands/core/bridge.js | 133 +++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 server/src/commands/core/bridge.js

(limited to 'server')

diff --git a/server/src/commands/core/bridge.js b/server/src/commands/core/bridge.js
new file mode 100644
index 0000000..89ed211
--- /dev/null
+++ b/server/src/commands/core/bridge.js
@@ -0,0 +1,133 @@
+/*
+  Description: Rebroadcasts any `text` to all clients in a `channel` with `nick`
+*/
+
+import * as UAC from "../utility/UAC/_info";
+
+// module support functions
+const parseText = (text) => {
+  // verifies user input is text
+  if (typeof text !== "string") {
+    return false;
+  }
+
+  let sanitizedText = text;
+
+  // strip newlines from beginning and end
+  sanitizedText = sanitizedText.replace(/^\s*\n|^\s+$|\n\s*$/g, "");
+  // replace 3+ newlines with just 2 newlines
+  sanitizedText = sanitizedText.replace(/\n{3,}/g, "\n\n");
+
+  return sanitizedText;
+};
+
+// module main
+export async function run(core, server, socket, data) {
+  // check user input
+  const text = parseText(data.text);
+
+  if (!text) {
+    // lets not send objects or empty text, yea?
+    return server.police.frisk(socket.address, 13);
+  }
+
+  // check for spam
+  const score = text.length / 83 / 4;
+  if (server.police.frisk(socket.address, score)) {
+    return server.reply(
+      {
+        cmd: "warn",
+        text:
+          "You are sending too much text. Wait a moment and try again.\nPress the up arrow key to restore your last message.",
+      },
+      socket
+    );
+  }
+
+  // build chat payload
+  const payload = {
+    cmd: "chat",
+    nick: data.nick,
+    text,
+    level: socket.level,
+  };
+
+  if (UAC.isAdmin(socket.level)) {
+    payload.admin = true;
+  } else if (UAC.isModerator(socket.level)) {
+    payload.mod = true;
+  }
+
+  if (socket.trip) {
+    payload.trip = socket.trip;
+  }
+
+  // broadcast to channel peers
+  server.broadcast(payload, {channel: socket.channel});
+
+  // stats are fun
+  core.stats.increment("messages-sent");
+
+  return true;
+}
+
+// module hook functions
+export function initHooks(server) {
+  server.registerHook("in", "chat", this.commandCheckIn.bind(this), 20);
+  server.registerHook("in", "chat", this.finalCmdCheck.bind(this), 254);
+}
+
+// checks for miscellaneous '/' based commands
+export function commandCheckIn(core, server, socket, payload) {
+  if (typeof payload.text !== "string") {
+    return false;
+  }
+
+  if (payload.text.startsWith("/myhash")) {
+    server.reply(
+      {
+        cmd: "info",
+        text: `Your hash: ${socket.hash}`,
+      },
+      socket
+    );
+
+    return false;
+  }
+
+  return payload;
+}
+
+export function finalCmdCheck(core, server, socket, payload) {
+  if (typeof payload.text !== "string") {
+    return false;
+  }
+
+  if (!payload.text.startsWith("/")) {
+    return payload;
+  }
+
+  if (payload.text.startsWith("//")) {
+    payload.text = payload.text.substr(1);
+
+    return payload;
+  }
+
+  server.reply(
+    {
+      cmd: "warn",
+      text: `Unknown command: ${payload.text}`,
+    },
+    socket
+  );
+
+  return false;
+}
+
+export const requiredData = ["text", "nick"];
+export const info = {
+  name: "chat",
+  description: "Broadcasts passed `text` field to the calling users channel using `nick`",
+  usage: `
+    API: { cmd: 'chat', text: '<text to send>', nick: 'nick'} `,
+};
-- 
cgit v1.2.1