1#!/usr/bin/env swift
2// Print the size of every item in my Photos Library.
3// See https://alexwlchan.net/2023/finding-big-photos/
4
5import Photos
6
7struct AssetData: Codable {
8  var localIdentifier: String
9  var originalFilename: String
10  var fileSize: Int64
11}
12
13/// Returns a list of assets in the Photos Library.
14///
15/// The list is sorted by file size, from largest to smallest.
16func getAssetsBySize() -> [AssetData] {
17  var allAssets: [AssetData] = []
18
19  let options: PHFetchOptions? = nil
20
21  PHAsset.fetchAssets(with: options)
22    .enumerateObjects({ (asset, _, _) in
23      let resource = PHAssetResource.assetResources(for: asset)[0]
24
25      let data = AssetData(
26        localIdentifier: asset.localIdentifier,
27        originalFilename: resource.originalFilename,
28        fileSize: resource.value(forKey: "fileSize") as! Int64
29      )
30
31      allAssets.append(data)
32    })
33
34  allAssets.sort { $0.fileSize > $1.fileSize }
35
36  return allAssets
37}
38
39/// Quick extension to allow left-padding a string in Swift
40///
41/// By user2878850 on Stack Overflow:
42/// https://stackoverflow.com/a/69859859/1558022
43extension String {
44  func leftPadding(toLength: Int, withPad: String) -> String {
45    String(
46      String(reversed())
47        .padding(toLength: toLength, withPad: withPad, startingAt: 0)
48        .reversed()
49    )
50  }
51}
52
53let bcf = ByteCountFormatter()
54
55for photo in getAssetsBySize() {
56  let size =
57    bcf
58      .string(fromByteCount: photo.fileSize)
59      .leftPadding(toLength: 8, withPad: " ")
60  print("\(size)  \(photo.originalFilename)")
61}