Add cache size info to Advanced prefs

Tusker.xcodeproj/project.pbxproj

@@ -48,6 +48,7 @@
 		D61F758A2932E1FC00C0B37F /* SwipeActionsPrefsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D61F75892932E1FC00C0B37F /* SwipeActionsPrefsView.swift */; };
 		D61F758D2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D61F758B2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.swift */; };
 		D61F758E2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.xib in Resources */ = {isa = PBXBuildFile; fileRef = D61F758C2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.xib */; };
+		D61F759029353B4300C0B37F /* FileManager+Size.swift in Sources */ = {isa = PBXBuildFile; fileRef = D61F758F29353B4300C0B37F /* FileManager+Size.swift */; };
 		D620483423D3801D008A63EF /* LinkTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D620483323D3801D008A63EF /* LinkTextView.swift */; };
 		D620483623D38075008A63EF /* ContentTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D620483523D38075008A63EF /* ContentTextView.swift */; };
 		D620483823D38190008A63EF /* StatusContentTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D620483723D38190008A63EF /* StatusContentTextView.swift */; };
@@ -412,6 +413,7 @@
 		D61F75892932E1FC00C0B37F /* SwipeActionsPrefsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwipeActionsPrefsView.swift; sourceTree = "<group>"; };
 		D61F758B2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusUpdatedNotificationTableViewCell.swift; sourceTree = "<group>"; };
 		D61F758C2933C69C00C0B37F /* StatusUpdatedNotificationTableViewCell.xib */ = {isa = PBXFileReference; lastKnownFileType = file.xib; path = StatusUpdatedNotificationTableViewCell.xib; sourceTree = "<group>"; };
+		D61F758F29353B4300C0B37F /* FileManager+Size.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "FileManager+Size.swift"; sourceTree = "<group>"; };
 		D620483323D3801D008A63EF /* LinkTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LinkTextView.swift; sourceTree = "<group>"; };
 		D620483523D38075008A63EF /* ContentTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentTextView.swift; sourceTree = "<group>"; };
 		D620483723D38190008A63EF /* StatusContentTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusContentTextView.swift; sourceTree = "<group>"; };
@@ -1166,6 +1168,7 @@
 				D62E9984279CA23900C26176 /* URLSession+Development.swift */,
 				D6ADB6ED28EA74E8009924AB /* UIView+Configure.swift */,
 				D63CC70F2911F1E4000E19DE /* UIScrollView+Top.swift */,
+				D61F758F29353B4300C0B37F /* FileManager+Size.swift */,
 			);
 			path = Extensions;
 			sourceTree = "<group>";
@@ -1935,6 +1938,7 @@
 				D6C143DA253510F4007DC240 /* ComposeEmojiTextField.swift in Sources */,
 				D6DD2A3F273C1F4900386A6C /* ComposeAttachmentImage.swift in Sources */,
 				D6DD2A45273D6C5700386A6C /* GIFImageView.swift in Sources */,
+				D61F759029353B4300C0B37F /* FileManager+Size.swift in Sources */,
 				0427033822B30F5F000D31B6 /* BehaviorPrefsView.swift in Sources */,
 				D627943923A553B600D38C68 /* UnbookmarkStatusActivity.swift in Sources */,
 				D64D0AAD2128D88B005A6F37 /* LocalData.swift in Sources */,

Tusker/Caching/DiskCache.swift

@@ -122,6 +122,10 @@ class DiskCache<T> {
         }
     }
     
+    func getSizeInBytes() -> Int64? {
+        return fileManager.recursiveSize(url: URL(fileURLWithPath: path, isDirectory: true))
+    }
+    
 }
 
 extension DiskCache {

Tusker/Caching/ImageCache.swift

@@ -110,6 +110,10 @@ class ImageCache {
         try cache.removeAll()
     }
     
+    func getDiskSizeInBytes() -> Int64? {
+        return cache.disk?.getSizeInBytes()
+    }
+    
     typealias Request = URLSessionDataTask
     
 }

Tusker/Caching/ImageDataCache.swift

@@ -11,7 +11,7 @@ import UIKit
 class ImageDataCache {
     
     private let memory: MemoryCache<Entry>
-    private let disk: DiskCache<Data>?
+    let disk: DiskCache<Data>?
     
     private let storeOriginalDataInMemory: Bool
     private let desiredPixelSize: CGSize?

Tusker/Extensions/FileManager+Size.swift

@@ -0,0 +1,35 @@
+//
+//  FileManager+Size.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 11/28/22.
+//  Copyright © 2022 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+
+extension FileManager {
+    func recursiveSize(url: URL) -> Int64? {
+        if (try? url.resourceValues(forKeys: [.isRegularFileKey]).isRegularFile) == true {
+            return size(url: url)
+        } else {
+            guard let enumerator = enumerator(at: url, includingPropertiesForKeys: [.isRegularFileKey, .fileSizeKey, .totalFileAllocatedSizeKey]) else {
+                return nil
+            }
+            var total: Int64 = 0
+            for case let url as URL in enumerator {
+                total += size(url: url) ?? 0
+            }
+            return total
+        }
+    }
+}
+
+private func size(url: URL) -> Int64? {
+    guard let resourceValues = try? url.resourceValues(forKeys: [.isRegularFileKey, .fileSizeKey, .totalFileAllocatedSizeKey]),
+          resourceValues.isRegularFile ?? false,
+          let size = resourceValues.fileSize ?? resourceValues.totalFileAllocatedSize else {
+        return nil
+    }
+    return Int64(size)
+}

Tusker/Screens/Preferences/AdvancedPrefsView.swift

@@ -11,7 +11,9 @@ import CoreData
 
 struct AdvancedPrefsView : View {
     @ObservedObject var preferences = Preferences.shared
-
+    @State private var imageCacheSize: Int64 = 0
+    @State private var mastodonCacheSize: Int64 = 0
+    
     var body: some View {
         List {
             formattingSection
@@ -64,13 +66,42 @@ struct AdvancedPrefsView : View {
     }
     
     var cachingSection: some View {
-        Section(header: Text("Caching"), footer: Text("Clearing caches will restart the app.")) {
+        Section {
             Button(action: clearCache) {
                 Text("Clear Mastodon Cache")
             }.foregroundColor(.red)
             Button(action: clearImageCaches) {
                 Text("Clear Image Caches")
             }.foregroundColor(.red)
+        } header: {
+            Text("Caching")
+        } footer: {
+            var s: AttributedString = "Clearing caches will restart the app."
+            if imageCacheSize != 0 {
+                s += AttributedString("\nImage cache size: \(ByteCountFormatter().string(fromByteCount: imageCacheSize))")
+            }
+            if mastodonCacheSize != 0 {
+                s += AttributedString("\nMastodon cache size: \(ByteCountFormatter().string(fromByteCount: mastodonCacheSize))")
+            }
+            return Text(s)
+        }.task {
+            imageCacheSize = [
+                ImageCache.avatars,
+                .headers,
+                .attachments,
+                .emojis,
+            ].map {
+                $0.getDiskSizeInBytes() ?? 0
+            }.reduce(0, +)
+            mastodonCacheSize = LocalData.shared.accounts.map {
+                let descriptions = MastodonController.getForAccount($0).persistentContainer.persistentStoreDescriptions
+                return descriptions.map {
+                    guard let url = $0.url else {
+                        return 0
+                    }
+                    return FileManager.default.recursiveSize(url: url) ?? 0
+                }.reduce(0, +)
+            }.reduce(0, +)
         }
     }