src/client/util/Import & Export/ImageUtils.ts


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import { Doc } from '../../../fields/Doc';
import { ImageField } from '../../../fields/URLField';
import { Cast, StrCast, NumCast } from '../../../fields/Types';
import { Networking } from '../../Network';
import { Id } from '../../../fields/FieldSymbols';
import { Utils } from '../../../Utils';

export namespace ImageUtils {
    export const ExtractExif = async (document: Doc): Promise<boolean> => {
        const field = Cast(document.data, ImageField);
        if (!field) {
            return false;
        }
        const source = field.url.href;
        const {
            contentSize,
            nativeWidth,
            nativeHeight,
            exifData: { error, data },
        } = await Networking.PostToServer('/inspectImage', { source });
        document.exif = error || Doc.Get.FromJson({ data });
        const proto = Doc.GetProto(document);
        nativeWidth && (document._height = (NumCast(document._width) * nativeHeight) / nativeWidth);
        proto['data_nativeWidth'] = nativeWidth;
        proto['data_nativeHeight'] = nativeHeight;
        proto['data-path'] = source;
        proto.data_contentSize = contentSize ? contentSize : undefined;
        return data !== undefined;
    };

    export const ExportHierarchyToFileSystem = async (collection: Doc): Promise<void> => {
        const a = document.createElement('a');
        a.href = Utils.prepend(`/imageHierarchyExport/${collection[Id]}`);
        a.download = `Dash Export [${StrCast(collection.title)}].zip`;
        a.click();
    };
}