RocketChat/Rocket.Chat

import type { AtLeast, IRoom, VideoConferenceCreateData, VideoConferenceType } from '@rocket.chat/core-typings';

type RoomRequiredFields = AtLeast<IRoom, '_id' | 't'>;
type VideoConferenceTypeCondition = (room: RoomRequiredFields, allowRinging: boolean) => Promise<boolean>;

const typeConditions: {
    data: VideoConferenceType | AtLeast<VideoConferenceCreateData, 'type'>;
    condition: VideoConferenceTypeCondition;
    priority: number;
}[] = [];

export const videoConfTypes = {
    registerVideoConferenceType(
        data: VideoConferenceType | AtLeast<VideoConferenceCreateData, 'type'>,
        condition: VideoConferenceTypeCondition,
        priority = 1,
    ): void {
        typeConditions.push({ data, condition, priority });
        typeConditions.sort(({ priority: prior1 }, { priority: prior2 }) => prior2 - prior1);
    },

    async getTypeForRoom(room: RoomRequiredFields, allowRinging: boolean): Promise<AtLeast<VideoConferenceCreateData, 'type'>> {
        for await (const { data, condition } of typeConditions) {
            if (await condition(room, allowRinging)) {
                if (typeof data === 'string') {
                    return {
                        type: data,
                    };
                }

                return data;
            }
        }

        return { type: 'videoconference' };
    },
};

videoConfTypes.registerVideoConferenceType({ type: 'livechat' }, async ({ t }) => t === 'l');