RocketChat/Rocket.Chat

/* eslint-disable complexity */
import type { IMessage, ISubscription } from '@rocket.chat/core-typings';
import { useContentBoxSize, useMutableCallback } from '@rocket.chat/fuselage-hooks';
import {
    MessageComposerAction,
    MessageComposerToolbarActions,
    MessageComposer,
    MessageComposerInput,
    MessageComposerToolbar,
    MessageComposerActionsDivider,
    MessageComposerToolbarSubmit,
    MessageComposerHint,
    MessageComposerButton,
} from '@rocket.chat/ui-composer';
import { useTranslation, useUserPreference, useLayout } from '@rocket.chat/ui-contexts';
import { useMutation } from '@tanstack/react-query';
import type {
    ReactElement,
    MouseEventHandler,
    FormEvent,
    KeyboardEventHandler,
    KeyboardEvent,
    ClipboardEventHandler,
    MouseEvent,
} from 'react';
import React, { memo, useRef, useReducer, useCallback } from 'react';
import { Trans } from 'react-i18next';
import { useSubscription } from 'use-subscription';

import { createComposerAPI } from '../../../../../app/ui-message/client/messageBox/createComposerAPI';
import type { FormattingButton } from '../../../../../app/ui-message/client/messageBox/messageBoxFormatting';
import { formattingButtons } from '../../../../../app/ui-message/client/messageBox/messageBoxFormatting';
import { getImageExtensionFromMime } from '../../../../../lib/getImageExtensionFromMime';
import { useFormatDateAndTime } from '../../../../hooks/useFormatDateAndTime';
import { useReactiveValue } from '../../../../hooks/useReactiveValue';
import type { ComposerAPI } from '../../../../lib/chats/ChatAPI';
import { roomCoordinator } from '../../../../lib/rooms/roomCoordinator';
import { keyCodes } from '../../../../lib/utils/keyCodes';
import AudioMessageRecorder from '../../../composer/AudioMessageRecorder';
import VideoMessageRecorder from '../../../composer/VideoMessageRecorder';
import { useChat } from '../../contexts/ChatContext';
import { useComposerPopup } from '../../contexts/ComposerPopupContext';
import { useRoom } from '../../contexts/RoomContext';
import ComposerBoxPopup from '../ComposerBoxPopup';
import ComposerBoxPopupPreview from '../ComposerBoxPopupPreview';
import ComposerUserActionIndicator from '../ComposerUserActionIndicator';
import { useAutoGrow } from '../RoomComposer/hooks/useAutoGrow';
import { useComposerBoxPopup } from '../hooks/useComposerBoxPopup';
import { useEnablePopupPreview } from '../hooks/useEnablePopupPreview';
import { useMessageComposerMergedRefs } from '../hooks/useMessageComposerMergedRefs';
import MessageBoxActionsToolbar from './MessageBoxActionsToolbar';
import MessageBoxFormattingToolbar from './MessageBoxFormattingToolbar';
import MessageBoxReplies from './MessageBoxReplies';
import { useMessageBoxAutoFocus } from './hooks/useMessageBoxAutoFocus';
import { useMessageBoxPlaceholder } from './hooks/useMessageBoxPlaceholder';

const reducer = (_: unknown, event: FormEvent<HTMLInputElement>): boolean => {
    const target = event.target as HTMLInputElement;

    return Boolean(target.value.trim());
};

const handleFormattingShortcut = (
    event: KeyboardEvent<HTMLTextAreaElement>,
    formattingButtons: FormattingButton[],
    composer: ComposerAPI,
) => {
    const isMacOS = navigator.platform.indexOf('Mac') !== -1;
    const isCmdOrCtrlPressed = (isMacOS && event.metaKey) || (!isMacOS && event.ctrlKey);

    if (!isCmdOrCtrlPressed) {
        return false;
    }

    const key = event.key.toLowerCase();

    const formatter = formattingButtons.find((formatter) => 'command' in formatter && formatter.command === key);

    if (!formatter || !('pattern' in formatter)) {
        return false;
    }

    composer.wrapSelection(formatter.pattern);
    return true;
};

const emptySubscribe = () => () => undefined;
const getEmptyFalse = () => false;
const a: any[] = [];
const getEmptyArray = () => a;

type MessageBoxProps = {
    tmid?: IMessage['_id'];
    readOnly: boolean;
    onSend?: (params: { value: string; tshow?: boolean; previewUrls?: string[] }) => Promise<void>;
    onJoin?: () => Promise<void>;
    onResize?: () => void;
    onTyping?: () => void;
    onEscape?: () => void;
    onNavigateToPreviousMessage?: () => void;
    onNavigateToNextMessage?: () => void;
    onUploadFiles?: (files: readonly File[]) => void;
    tshow?: IMessage['tshow'];
    previewUrls?: string[];
    subscription?: ISubscription;
    showFormattingTips: boolean;
    isEmbedded?: boolean;
};

const MessageBox = ({
    tmid,
    onSend,
    onJoin,
    onNavigateToNextMessage,
    onNavigateToPreviousMessage,
    onUploadFiles,
    onEscape,
    onTyping,
    readOnly,
    tshow,
    previewUrls,
}: MessageBoxProps): ReactElement => {
    const chat = useChat();
    const room = useRoom();
    const t = useTranslation();
    const composerPlaceholder = useMessageBoxPlaceholder(t('Message'), room);

    const [typing, setTyping] = useReducer(reducer, false);

    const { isMobile } = useLayout();
    const sendOnEnterBehavior = useUserPreference<'normal' | 'alternative' | 'desktop'>('sendOnEnter') || isMobile;
    const sendOnEnter = sendOnEnterBehavior == null || sendOnEnterBehavior === 'normal' || (sendOnEnterBehavior === 'desktop' && !isMobile);

    if (!chat) {
        throw new Error('Chat context not found');
    }

    const textareaRef = useRef<HTMLTextAreaElement>(null);
    const messageComposerRef = useRef<HTMLElement>(null);
    const shadowRef = useRef<HTMLDivElement>(null);

    const storageID = `messagebox_${room._id}${tmid ? `-${tmid}` : ''}`;

    const callbackRef = useCallback(
        (node: HTMLTextAreaElement) => {
            if (node === null || chat.composer) {
                return;
            }
            chat.setComposerAPI(createComposerAPI(node, storageID));
        },
        [chat, storageID],
    );

    const autofocusRef = useMessageBoxAutoFocus(!isMobile);

    const useEmojis = useUserPreference<boolean>('useEmojis');

    const handleOpenEmojiPicker: MouseEventHandler<HTMLElement> = useMutableCallback((e) => {
        e.stopPropagation();
        e.preventDefault();

        if (!useEmojis) {
            return;
        }

        const ref = messageComposerRef.current as HTMLElement;
        chat.emojiPicker.open(ref, (emoji: string) => chat.composer?.insertText(` :${emoji}: `));
    });

    const handleSendMessage = useMutableCallback(() => {
        const text = chat.composer?.text ?? '';
        chat.composer?.clear();
        clearPopup();

        onSend?.({
            value: text,
            tshow,
            previewUrls,
        });
    });

    const closeEditing = (event: KeyboardEvent | MouseEvent<HTMLElement>) => {
        if (chat.currentEditing) {
            event.preventDefault();
            event.stopPropagation();

            chat.currentEditing.reset().then((reset) => {
                if (!reset) {
                    chat.currentEditing?.cancel();
                }
            });
        }
    };

    const handler: KeyboardEventHandler<HTMLTextAreaElement> = useMutableCallback((event) => {
        const { which: keyCode } = event;

        const input = event.target as HTMLTextAreaElement;

        const isSubmitKey = keyCode === keyCodes.CARRIAGE_RETURN || keyCode === keyCodes.NEW_LINE;

        if (isSubmitKey) {
            const withModifier = event.shiftKey || event.ctrlKey || event.altKey || event.metaKey;
            const isSending = (sendOnEnter && !withModifier) || (!sendOnEnter && withModifier);

            event.preventDefault();
            if (!isSending) {
                chat.composer?.insertNewLine();
                return false;
            }
            handleSendMessage();
            return false;
        }

        if (chat.composer && handleFormattingShortcut(event, [...formattingButtons], chat.composer)) {
            return;
        }

        if (event.shiftKey || event.ctrlKey || event.metaKey) {
            return;
        }

        switch (event.key) {
            case 'Escape': {
                closeEditing(event);
                if (!input.value.trim()) onEscape?.();
                return;
            }

            case 'ArrowUp': {
                if (input.selectionEnd === 0) {
                    event.preventDefault();
                    event.stopPropagation();

                    onNavigateToPreviousMessage?.();

                    if (event.altKey) {
                        input.setSelectionRange(0, 0);
                    }
                }

                return;
            }

            case 'ArrowDown': {
                if (input.selectionEnd === input.value.length) {
                    event.preventDefault();
                    event.stopPropagation();

                    onNavigateToNextMessage?.();

                    if (event.altKey) {
                        input.setSelectionRange(input.value.length, input.value.length);
                    }
                }
            }
        }

        onTyping?.();
    });

    const isEditing = useSubscription({
        getCurrentValue: chat.composer?.editing.get ?? getEmptyFalse,
        subscribe: chat.composer?.editing.subscribe ?? emptySubscribe,
    });

    const isRecordingAudio = useSubscription({
        getCurrentValue: chat.composer?.recording.get ?? getEmptyFalse,
        subscribe: chat.composer?.recording.subscribe ?? emptySubscribe,
    });

    const isMicrophoneDenied = useSubscription({
        getCurrentValue: chat.composer?.isMicrophoneDenied.get ?? getEmptyFalse,
        subscribe: chat.composer?.isMicrophoneDenied.subscribe ?? emptySubscribe,
    });

    const isRecordingVideo = useSubscription({
        getCurrentValue: chat.composer?.recordingVideo.get ?? getEmptyFalse,
        subscribe: chat.composer?.recordingVideo.subscribe ?? emptySubscribe,
    });

    const formatters = useSubscription({
        getCurrentValue: chat.composer?.formatters.get ?? getEmptyArray,
        subscribe: chat.composer?.formatters.subscribe ?? emptySubscribe,
    });

    const isRecording = isRecordingAudio || isRecordingVideo;

    const { textAreaStyle, shadowStyle } = useAutoGrow(textareaRef, shadowRef, isRecordingAudio);

    const canSend = useReactiveValue(useCallback(() => roomCoordinator.verifyCanSendMessage(room._id), [room._id]));

    const sizes = useContentBoxSize(textareaRef);

    const format = useFormatDateAndTime();

    const joinMutation = useMutation(async () => onJoin?.());

    const handlePaste: ClipboardEventHandler<HTMLTextAreaElement> = useMutableCallback((event) => {
        const { clipboardData } = event;

        if (!clipboardData) {
            return;
        }

        const items = Array.from(clipboardData.items);

        if (items.some(({ kind, type }) => kind === 'string' && type === 'text/plain')) {
            return;
        }

        const files = items
            .filter((item) => item.kind === 'file' && item.type.indexOf('image/') !== -1)
            .map((item) => {
                const fileItem = item.getAsFile();

                if (!fileItem) {
                    return;
                }

                const imageExtension = fileItem ? getImageExtensionFromMime(fileItem.type) : undefined;

                const extension = imageExtension ? `.${imageExtension}` : '';

                Object.defineProperty(fileItem, 'name', {
                    writable: true,
                    value: `Clipboard - ${format(new Date())}${extension}`,
                });
                return fileItem;
            })
            .filter((file): file is File => !!file);

        if (files.length) {
            event.preventDefault();
            onUploadFiles?.(files);
        }
    });

    const composerPopupConfig = useComposerPopup();

    const {
        popup,
        focused,
        items,
        ariaActiveDescendant,
        suspended,
        select,
        commandsRef,
        callbackRef: c,
        filter,
        clearPopup,
    } = useComposerBoxPopup<{ _id: string; sort?: number }>({
        configurations: composerPopupConfig,
    });

    const mergedRefs = useMessageComposerMergedRefs(c, textareaRef, callbackRef, autofocusRef);

    const shouldPopupPreview = useEnablePopupPreview(filter, popup);

    return (
        <>
            {chat.composer?.quotedMessages && <MessageBoxReplies />}
            {shouldPopupPreview && popup && (
                <ComposerBoxPopup select={select} items={items} focused={focused} title={popup.title} renderItem={popup.renderItem} />
            )}
            {/*
                SlashCommand Preview popup works in a weird way
                There is only one trigger for all the commands: "/"
                After that we need to the slashcommand list and check if the command exists and provide the preview
                if not the query is `suspend` which means the slashcommand is not found or doesn't have a preview
            */}
            {popup?.preview && (
                <ComposerBoxPopupPreview
                    select={select}
                    items={items as any}
                    focused={focused as any}
                    renderItem={popup.renderItem}
                    ref={commandsRef}
                    rid={room._id}
                    tmid={tmid}
                    suspended={suspended}
                />
            )}
            {isEditing && (
                <MessageComposerHint
                    icon='pencil'
                    helperText={
                        !isMobile ? (
                            <Trans i18nKey='Editing_message_hint'>
                                <strong>esc</strong> to cancel · <strong>enter</strong> to save
                            </Trans>
                        ) : undefined
                    }
                >
                    {t('Editing_message')}
                </MessageComposerHint>
            )}
            {readOnly && !isEditing && <MessageComposerHint>{t('This_room_is_read_only')}</MessageComposerHint>}
            {isRecordingVideo && <VideoMessageRecorder reference={messageComposerRef} rid={room._id} tmid={tmid} />}
            <MessageComposer ref={messageComposerRef} variant={isEditing ? 'editing' : undefined}>
                {isRecordingAudio && <AudioMessageRecorder rid={room._id} isMicrophoneDenied={isMicrophoneDenied} />}
                <MessageComposerInput
                    ref={mergedRefs}
                    aria-label={composerPlaceholder}
                    name='msg'
                    disabled={isRecording || !canSend}
                    onChange={setTyping}
                    style={textAreaStyle}
                    placeholder={composerPlaceholder}
                    onKeyDown={handler}
                    onPaste={handlePaste}
                    aria-activedescendant={ariaActiveDescendant}
                />
                <div ref={shadowRef} style={shadowStyle} />
                <MessageComposerToolbar>
                    <MessageComposerToolbarActions aria-label={t('Message_composer_toolbox_primary_actions')}>
                        <MessageComposerAction
                            icon='emoji'
                            disabled={!useEmojis || isRecording || !canSend}
                            onClick={handleOpenEmojiPicker}
                            title={t('Emoji')}
                        />
                        <MessageComposerActionsDivider />
                        {chat.composer && formatters.length > 0 && (
                            <MessageBoxFormattingToolbar
                                composer={chat.composer}
                                variant={sizes.inlineSize < 480 ? 'small' : 'large'}
                                items={formatters}
                                disabled={isRecording || !canSend}
                            />
                        )}
                        <MessageBoxActionsToolbar
                            canSend={canSend}
                            typing={typing}
                            isMicrophoneDenied={isMicrophoneDenied}
                            rid={room._id}
                            tmid={tmid}
                            isRecording={isRecording}
                            variant={sizes.inlineSize < 480 ? 'small' : 'large'}
                        />
                    </MessageComposerToolbarActions>
                    <MessageComposerToolbarSubmit>
                        {!canSend && (
                            <MessageComposerButton primary onClick={onJoin} loading={joinMutation.isLoading}>
                                {t('Join')}
                            </MessageComposerButton>
                        )}
                        {canSend && (
                            <>
                                {isEditing && <MessageComposerButton onClick={closeEditing}>{t('Cancel')}</MessageComposerButton>}
                                <MessageComposerAction
                                    aria-label={t('Send')}
                                    icon='send'
                                    disabled={!canSend || (!typing && !isEditing)}
                                    onClick={handleSendMessage}
                                    secondary={typing || isEditing}
                                    info={typing || isEditing}
                                />
                            </>
                        )}
                    </MessageComposerToolbarSubmit>
                </MessageComposerToolbar>
            </MessageComposer>
            <ComposerUserActionIndicator rid={room._id} tmid={tmid} />
        </>
    );
};

export default memo(MessageBox);