element-web/src/components/views/dialogs/UploadConfirmDialog.tsx

/*
Copyright 2019, 2021 The Matrix.org Foundation C.I.C.
Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import React from 'react';
import filesize from "filesize";

import { Icon as FileIcon } from '../../../../res/img/feather-customised/files.svg';
import { _t } from '../../../languageHandler';
import { getBlobSafeMimeType } from '../../../utils/blobs';
import BaseDialog from "./BaseDialog";
import DialogButtons from "../elements/DialogButtons";

interface IProps {
    file: File;
    currentIndex: number;
    totalFiles?: number;
    onFinished: (uploadConfirmed: boolean, uploadAll?: boolean) => void;
}

export default class UploadConfirmDialog extends React.Component<IProps> {
    private readonly objectUrl: string;
    private readonly mimeType: string;

    static defaultProps = {
        totalFiles: 1,
    };

    constructor(props) {
        super(props);

        // Create a fresh `Blob` for previewing (even though `File` already is
        // one) so we can adjust the MIME type if needed.
        this.mimeType = getBlobSafeMimeType(props.file.type);
        const blob = new Blob([props.file], { type:
            this.mimeType,
        });
        this.objectUrl = URL.createObjectURL(blob);
    }

    componentWillUnmount() {
        if (this.objectUrl) URL.revokeObjectURL(this.objectUrl);
    }

    private onCancelClick = () => {
        this.props.onFinished(false);
    };

    private onUploadClick = () => {
        this.props.onFinished(true);
    };

    private onUploadAllClick = () => {
        this.props.onFinished(true, true);
    };

    render() {
        let title: string;
        if (this.props.totalFiles > 1 && this.props.currentIndex !== undefined) {
            title = _t(
                "Upload files (%(current)s of %(total)s)",
                {
                    current: this.props.currentIndex + 1,
                    total: this.props.totalFiles,
                },
            );
        } else {
            title = _t('Upload files');
        }

        const fileId = `mx-uploadconfirmdialog-${this.props.file.name}`;
        let preview: JSX.Element;
        let placeholder: JSX.Element;
        if (this.mimeType.startsWith("image/")) {
            preview = (
                <img
                    className="mx_UploadConfirmDialog_imagePreview"
                    src={this.objectUrl}
                    aria-labelledby={fileId}
                />
            );
        } else if (this.mimeType.startsWith("video/")) {
            preview = (
                <video className="mx_UploadConfirmDialog_imagePreview" src={this.objectUrl} playsInline controls={false} />
            );
        } else {
            placeholder = (
                <FileIcon
                    className="mx_UploadConfirmDialog_fileIcon"
                    height={18}
                    width={18}
                />
            );
        }

        let uploadAllButton;
        if (this.props.currentIndex + 1 < this.props.totalFiles) {
            uploadAllButton = <button onClick={this.onUploadAllClick}>
                { _t("Upload all") }
            </button>;
        }

        return (
            <BaseDialog
                className="mx_UploadConfirmDialog"
                fixedWidth={false}
                onFinished={this.onCancelClick}
                title={title}
                contentId="mx_Dialog_content"
            >
                <div id="mx_Dialog_content">
                    <div className="mx_UploadConfirmDialog_previewOuter">
                        <div className="mx_UploadConfirmDialog_previewInner">
                            { preview && <div>{ preview }</div> }
                            <div id={fileId}>
                                { placeholder }
                                { this.props.file.name } ({ filesize(this.props.file.size) })
                            </div>
                        </div>
                    </div>
                </div>

                <DialogButtons primaryButton={_t('Upload')}
                    hasCancel={false}
                    onPrimaryButtonClick={this.onUploadClick}
                    focus={true}
                >
                    { uploadAllButton }
                </DialogButtons>
            </BaseDialog>
        );
    }
}