Combine Knub's type helpers with Zeppelin's, continue Utility plugin port

backend/src/plugins/Utility/commands/NicknameCmd.ts

@@ -0,0 +1,47 @@
+import { utilityCmd } from "../types";
+import { commandTypeHelpers as ct } from "../../../commandTypes";
+import { baseTypeHelpers as t } from "knub";
+import { errorMessage } from "../../../utils";
+import { canActOn, sendSuccessMessage } from "../../../pluginUtils";
+
+export const NicknameCmd = utilityCmd({
+  trigger: "nickname",
+  description: "Set a member's nickname",
+  usage: "!nickname 106391128718245888 Drag",
+  permission: "can_nickname",
+
+  signature: {
+    member: ct.resolvedMember(),
+    nickname: t.string({ catchAll: true }),
+  },
+
+  async run({ message: msg, args, pluginData }) {
+    if (msg.member.id !== args.member.id && canActOn(pluginData, msg.member, args.member)) {
+      msg.channel.createMessage(errorMessage("Cannot change nickname: insufficient permissions"));
+      return;
+    }
+
+    const nicknameLength = [...args.nickname].length;
+    if (nicknameLength < 2 || nicknameLength > 32) {
+      msg.channel.createMessage(errorMessage("Nickname must be between 2 and 32 characters long"));
+      return;
+    }
+
+    const oldNickname = args.member.nick || "<none>";
+
+    try {
+      await args.member.edit({
+        nick: args.nickname,
+      });
+    } catch (e) {
+      msg.channel.createMessage(errorMessage("Failed to change nickname"));
+      return;
+    }
+
+    sendSuccessMessage(
+      pluginData,
+      msg.channel,
+      `Changed nickname of <@!${args.member.id}> from **${oldNickname}** to **${args.nickname}**`,
+    );
+  },
+});