Port /randtopic to the sim

Per request from staff, since Officer Jenny has been taken down, this is one of the commands they'd like ported.

Author: mia-pi-git

server/chat-commands/info.ts

@@ -2990,6 +2990,52 @@ export const commands: Chat.ChatCommands = {
 	altsloghelp: [
 		`/altslog [userid] - View the alternate account history for the given [userid]. Requires: % @ &`,
 	],
+
+	randtopic(target, room, user) {
+		room = this.requireRoom();
+		if (!room.settings.topics?.length) {
+			return this.errorReply(`This room has no random topics to select from.`);
+		}
+		this.runBroadcast();
+		this.sendReply(Utils.html`|html|<div class="broadcast-blue">${Utils.randomElement(room.settings.topics)}</div>`);
+	},
+
+	addtopic(target, room, user) {
+		room = this.requireRoom();
+		this.checkCan('mute', null, room);
+		target = target.trim();
+		if (!toID(target).length) {
+			return this.parse(`/help addtopic`);
+		}
+		if (!room.settings.topics) room.settings.topics = [];
+		room.settings.topics.push(target);
+		this.privateModAction(`${user.name} added the topic "${target}" to the random topic pool.`);
+		this.modlog('ADDTOPIC', null, target);
+		room.saveSettings();
+	},
+	addtopichelp: [`/addtopic [target] - Adds the [target] to the pool of random discussion topics. Requires: % @ # &`],
+
+	removetopic(target, room, user) {
+		room = this.requireRoom();
+		this.checkCan('mute', null, room);
+		const index = Number(toID(target)) - 1;
+		if (isNaN(index)) {
+			return this.errorReply(`Invalid topic index: ${target}. Must be a number.`);
+		}
+		if (!room.settings.topics?.[index]) {
+			return this.errorReply(`Topic ${index + 1} not found.`);
+		}
+		const topic = room.settings.topics.splice(index, 1)[0];
+		room.saveSettings();
+		this.privateModAction(`${user.name} removed topic ${index + 1} from the random topic pool.`);
+		this.modlog('REMOVETOPIC', null, topic);
+	},
+	removetopichelp: [`/removetopic [index] - Removes the topic from the room's topic pool. Requires: % @ # &`],
+
+	randomtopics(target, room, user) {
+		room = this.requireRoom();
+		return this.parse(`/join view-topics-${room}`);
+	},
 };
 
 export const handlers: Chat.Handlers = {
@@ -3065,6 +3111,22 @@ export const pages: Chat.PageTable = {
 		}
 		return buf;
 	},
+	topics(query, user) {
+		const room = this.requireRoom();
+		this.title = `[Topics] ${room.title}`;
+		const topics = room.settings.topics || [];
+		let buf;
+		if (!topics.length) {
+			buf = `<div class="pad"><h2>This room has no discussion topics saved.</h2></div>`;
+			return buf;
+		}
+		buf = `<div class="pad"><h2>Random topics for ${room.title} (${topics.length}):</h2><ul>`;
+		for (const [i, topic] of topics.entries()) {
+			buf += Utils.html`<li>${i + 1}: "${topic}"</li>`;
+		}
+		buf += `</ul></div>`;
+		return buf;
+	},
 	battlerules(query, user) {
 		const rules = Object.values(Dex.data.Rulesets).filter(rule => rule.effectType !== "Format");
 		const tourHelp = `https://www.smogon.com/forums/threads/pok%C3%A9mon-showdown-forum-rules-resources-read-here-first.3570628/#post-6777489`;

server/rooms.ts

@@ -121,6 +121,7 @@ export interface RoomSettings {
 	minorActivity?: PollData | AnnouncementData;
 	minorActivityQueue?: MinorActivityData[];
 	repeats?: RepeatedPhrase[];
+	topics?: string[];
 	autoModchat?: {
 		rank: GroupSymbol,
 		time: number,