Add IrcColors plugin

The plugin generates unique colors for usernames in chat, similar to how
it works in many IRC clients.

src/plugins/ircColors/index.ts

@@ -0,0 +1,64 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2023 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import definePlugin from "@utils/types";
+
+export default definePlugin({
+    name: "IrcColors",
+    description: "Makes username colors in chat unique, like in IRC clients",
+    authors: [
+        {
+            id: 368475654662127616n,
+            name: "Grzesiek11",
+        },
+    ],
+    patches: [
+        {
+            find: ".useCanSeeRemixBadge)",
+            replacement: {
+                match: /style:"username"===.{1,2}&&null!=.{1,2}\?{color:.{1,2}}:void 0/,
+                replace: "style:{color:$self.calculateNameColor(BigInt(arguments[0].message.author.id))}"
+            },
+        },
+    ],
+    // Calculate a CSS color string based on the user ID
+    calculateNameColor(id: bigint) {
+        // Compute a 64-bit FNV-1a hash of the passed data
+        function hash(data: ArrayBuffer) {
+            const fnvPrime = 1099511628211n;
+            const offsetBasis = 14695981039346656037n;
+
+            let result = offsetBasis;
+            for (const byte of new Uint8Array(data)) {
+                result ^= BigInt(byte);
+                result = (result * fnvPrime) % 2n**32n;
+            }
+
+            return result;
+        }
+
+        const idBuffer = new ArrayBuffer(16);
+        {
+            const idView = new DataView(idBuffer);
+            idView.setBigUint64(0, id);
+        }
+        const idHash = hash(idBuffer);
+
+        return `hsl(${idHash % 360n}, 100%, 70%)`;
+    },
+});