Example app for archiving a room, pr https://github.com/RocketChat/Rocket.Chat.Apps-engine/pull/535 & https://github.com/RocketChat/Rocket.Chat/pull/26317

ArchiveCommand.ts

import {
    IRead,
    IModify,
    IHttp,
    IPersistence,
} from "@rocket.chat/apps-engine/definition/accessors";
import {
    ISlashCommand,
    SlashCommandContext,
} from "@rocket.chat/apps-engine/definition/slashcommands";

export class ArchiveCommand implements ISlashCommand {
    public command: string = "archivea";
    public i18nParamsExample: string = "";
    public i18nDescription: string = "";
    public providesPreview: boolean = false;
    public async executor(
        context: SlashCommandContext,
        read: IRead,
        modify: IModify,
        http: IHttp,
        persis: IPersistence
    ): Promise<void> {
        const success = await modify
            .getUpdater()
            .getRoomUpdater()
            .archiveRoom(context.getRoom());
    }
}

ArchiveRoomApp.ts

import {
    IAppAccessors,
    IConfigurationExtend,
    IEnvironmentRead,
    ILogger,
} from "@rocket.chat/apps-engine/definition/accessors";
import { App } from "@rocket.chat/apps-engine/definition/App";
import { IAppInfo } from "@rocket.chat/apps-engine/definition/metadata";
import { ArchiveCommand } from "./commands/ArchiveCommand";

export class ArchiveRoomApp extends App {
    constructor(info: IAppInfo, logger: ILogger, accessors: IAppAccessors) {
        super(info, logger, accessors);
    }

    protected async extendConfiguration(
        configuration: IConfigurationExtend,
        environmentRead: IEnvironmentRead
    ): Promise<void> {
        await configuration.slashCommands.provideSlashCommand(
            new ArchiveCommand()
        );
    }
}