65 lines
1.7 KiB
TypeScript
65 lines
1.7 KiB
TypeScript
import {
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getExtensionFromStorageUrl,
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getIdFromStorageUrl,
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} from '@/services/storage';
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import { convertExifToFormData } from '@/photo/form';
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import {
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getFujifilmSimulationFromMakerNote,
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isExifForFujifilm,
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} from '@/vendors/fujifilm';
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import { ExifData, ExifParserFactory } from 'ts-exif-parser';
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import { PhotoFormData } from './form';
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import { FilmSimulation } from '@/simulation';
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export const extractExifDataFromBlobPath = async (
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blobPath: string
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): Promise<{
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blobId?: string
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photoFormExif?: Partial<PhotoFormData>
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}> => {
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const url = decodeURIComponent(blobPath);
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const blobId = getIdFromStorageUrl(url);
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const extension = getExtensionFromStorageUrl(url);
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const fileBytes = blobPath
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? await fetch(url)
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.then(res => res.arrayBuffer())
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: undefined;
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let exifData: ExifData | undefined;
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let filmSimulation: FilmSimulation | undefined;
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if (fileBytes) {
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const parser = ExifParserFactory.create(Buffer.from(fileBytes));
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// Data for form
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parser.enableBinaryFields(false);
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exifData = parser.parse();
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// Capture film simulation for Fujifilm cameras
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if (isExifForFujifilm(exifData)) {
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// Parse exif data again with binary fields
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// in order to access MakerNote tag
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parser.enableBinaryFields(true);
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const exifDataBinary = parser.parse();
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const makerNote = exifDataBinary.tags?.MakerNote;
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if (Buffer.isBuffer(makerNote)) {
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filmSimulation = getFujifilmSimulationFromMakerNote(makerNote);
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}
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}
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}
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return {
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blobId,
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...exifData && {
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photoFormExif: {
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...convertExifToFormData(exifData, filmSimulation),
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extension,
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url,
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},
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},
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};
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};
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