mattermost-mobile/app/utils/user/index.ts

// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {General, Preferences} from '@constants';
import {DEFAULT_LOCALE, getLocalizedMessage, t} from '@i18n';

export function displayUsername(user?: UserProfile, locale?: string, teammateDisplayNameSetting?: string, useFallbackUsername = true) {
    let name = useFallbackUsername ? getLocalizedMessage(locale || DEFAULT_LOCALE, t('channel_loader.someone'), 'Someone') : '';

    if (user) {
        if (teammateDisplayNameSetting === Preferences.DISPLAY_PREFER_NICKNAME) {
            name = user.nickname || getFullName(user);
        } else if (teammateDisplayNameSetting === Preferences.DISPLAY_PREFER_FULL_NAME) {
            name = getFullName(user);
        } else {
            name = user.username;
        }

        if (!name || name.trim().length === 0) {
            name = user.username;
        }
    }

    return name;
}

export function displayGroupMessageName(users: UserProfile[], locale?: string, teammateDisplayNameSetting?: string, excludeUserId?: string) {
    const names: string[] = [];
    const sortUsernames = (a: string, b: string) => {
        return a.localeCompare(b, locale || DEFAULT_LOCALE, {numeric: true});
    };

    users.forEach((u) => {
        if (u.id !== excludeUserId) {
            names.push(displayUsername(u, locale, teammateDisplayNameSetting));
        }
    });

    return names.sort(sortUsernames).join(', ');
}

export function getFullName(user: UserProfile): string {
    if (user.first_name && user.last_name) {
        return `${user.first_name} ${user.last_name}`;
    } else if (user.first_name) {
        return user.first_name;
    } else if (user.last_name) {
        return user.last_name;
    }

    return '';
}

export function getUserIdFromChannelName(knownUserId: string, channelName: string): string {
    const ids = channelName.split('__');
    if (ids[0] === knownUserId) {
        return ids[1];
    }
    return ids[0];
}

export function isRoleInRoles(roles: string, role: string): boolean {
    const rolesArray = roles.split(' ');
    return rolesArray.includes(role);
}

export function isGuest(roles: string): boolean {
    return isRoleInRoles(roles, General.SYSTEM_GUEST_ROLE);
}

export function isSystemAdmin(roles: string): boolean {
    return isRoleInRoles(roles, General.SYSTEM_ADMIN_ROLE);
}