RocketChat/Rocket.Chat

import type { IMessage } from '@rocket.chat/core-typings';

import { settings } from '../../../../app/settings/client';
import { t } from '../../../../app/utils/lib/i18n';
import GenericModal from '../../../components/GenericModal';
import { imperativeModal } from '../../imperativeModal';
import { dispatchToastMessage } from '../../toast';
import type { ChatAPI } from '../ChatAPI';

export const processTooLongMessage = async (chat: ChatAPI, { msg }: Pick<IMessage, 'msg'>): Promise<boolean> => {
    const maxAllowedSize = settings.get('Message_MaxAllowedSize');

    if (msg.length <= maxAllowedSize) {
        return false;
    }
    const fileUploadsEnabled = settings.get('FileUpload_Enabled');
    const convertLongMessagesToAttachment = settings.get('Message_AllowConvertLongMessagesToAttachment');

    if (chat.currentEditing || !fileUploadsEnabled || !convertLongMessagesToAttachment) {
        dispatchToastMessage({ type: 'error', message: new Error(t('Message_too_long')) });
        chat.composer?.setText(msg);
        return true;
    }

    await new Promise<void>((resolve) => {
        const onConfirm = async (): Promise<void> => {
            const contentType = 'text/plain';
            const messageBlob = new Blob([msg], { type: contentType });
            const fileName = `${Meteor.user()?.username ?? 'anonymous'} - ${new Date()}.txt`; // TODO: proper naming and formatting
            const file = new File([messageBlob], fileName, {
                type: contentType,
                lastModified: Date.now(),
            });

            imperativeModal.close();
            await chat.flows.uploadFiles([file]);

            resolve();
        };

        const onClose = (): void => {
            chat.composer?.setText(msg);

            imperativeModal.close();
            resolve();
        };

        imperativeModal.open({
            component: GenericModal,
            props: {
                title: t('Message_too_long'),
                children: t('Send_it_as_attachment_instead_question'),
                onConfirm,
                onClose,
                onCancel: onClose,
                variant: 'warning',
            },
        });
    });

    return true;
};