Minimum viable Apple Photos library image export

photos-album-exporter.swift

import Foundation
import Cocoa
import Photos

class PhotoExporter {
    let imageManager = PHImageManager.default()

    func exportPhoto(withLocalIdentifier identifier: String, to destinationURL: URL) {

        // Fetch the asset with the specified identifier
        let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: [identifier], options: nil)
        
        guard let asset = fetchResult.firstObject else {
            print("No asset found with the specified identifier.")
            return
        }

        // Request the image data for the asset
        let options = PHImageRequestOptions()
        options.isNetworkAccessAllowed = true
        options.version = .current
        options.deliveryMode = .highQualityFormat
        options.isSynchronous = true
        
        imageManager.requestImageDataAndOrientation(for: asset, options: options) { imageData, dataUTI, orientation, info in
            guard let data = imageData else {
                print("Failed to retrieve image data.")
                return
            }
            
            // Write the image data to the destination URL
            do {
                try data.write(to: destinationURL)
                print("Image exported successfully to \(destinationURL)")
            } catch {
                print("Failed to write image data to \(destinationURL): \(error)")
            }
        }
    }
}

let exporter = PhotoExporter()
let photoIdentifier = "77758382-025A-446E-91C6-88A0BCAFDA91" // (Your photo UUID here)
let destinationPath = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask)[0].appendingPathComponent("photokit-test.jpeg")

exporter.exportPhoto(withLocalIdentifier: photoIdentifier, to: destinationPath)