Only migrate changed preferences

Packages/TuskerPreferences/Sources/TuskerPreferences/Coding.swift

@@ -13,6 +13,9 @@ private protocol PreferenceProtocol {
     init()
 }
 
+extension Preference: PreferenceProtocol {
+}
+
 struct PreferenceCoding<Wrapped: Codable>: Codable {
     let wrapped: Wrapped
     

Packages/TuskerPreferences/Sources/TuskerPreferences/Legacy/PreferenceStore+Migrate.swift

@@ -6,67 +6,97 @@
 //
 
 import Foundation
+import UIKit
 
 extension PreferenceStore {
     func migrate(from legacy: LegacyPreferences) {
-        self.theme = switch legacy.theme {
+        let migrations: [any MigrationProtocol] = [
-        case .light: .light
+            Migration(from: \.theme.theme, to: \.$theme),
-        case .dark: .dark
+            Migration(from: \.pureBlackDarkMode, to: \.$pureBlackDarkMode),
-        default: .unspecified
+            Migration(from: \.accentColor, to: \.$accentColor),
-        }
+            Migration(from: \.avatarStyle, to: \.$avatarStyle),
-        self.pureBlackDarkMode = legacy.pureBlackDarkMode
+            Migration(from: \.hideCustomEmojiInUsernames, to: \.$hideCustomEmojiInUsernames),
-        self.accentColor = legacy.accentColor
+            Migration(from: \.showIsStatusReplyIcon, to: \.$showIsStatusReplyIcon),
-        self.avatarStyle = legacy.avatarStyle
+            Migration(from: \.alwaysShowStatusVisibilityIcon, to: \.$alwaysShowStatusVisibilityIcon),
-        self.hideCustomEmojiInUsernames = legacy.hideCustomEmojiInUsernames
+            Migration(from: \.hideActionsInTimeline, to: \.$hideActionsInTimeline),
-        self.showIsStatusReplyIcon = legacy.showIsStatusReplyIcon
+            Migration(from: \.showLinkPreviews, to: \.$showLinkPreviews),
-        self.alwaysShowStatusVisibilityIcon = legacy.alwaysShowStatusVisibilityIcon
+            Migration(from: \.leadingStatusSwipeActions, to: \.$leadingStatusSwipeActions),
-        self.hideActionsInTimeline = legacy.hideActionsInTimeline
+            Migration(from: \.trailingStatusSwipeActions, to: \.$trailingStatusSwipeActions),
-        self.showLinkPreviews = legacy.showLinkPreviews
+            Migration(from: \.widescreenNavigationMode, to: \.$widescreenNavigationMode),
-        self.leadingStatusSwipeActions = legacy.leadingStatusSwipeActions
+            Migration(from: \.underlineTextLinks, to: \.$underlineTextLinks),
-        self.trailingStatusSwipeActions = legacy.trailingStatusSwipeActions
+            Migration(from: \.showAttachmentsInTimeline, to: \.$showAttachmentsInTimeline),
-        if legacy.widescreenNavigationMode != .splitScreen {
-            self.widescreenNavigationMode = legacy.widescreenNavigationMode
-        }
-        self.underlineTextLinks = legacy.underlineTextLinks
-        self.showAttachmentsInTimeline = legacy.showAttachmentsInTimeline
             
-        self.defaultPostVisibility = legacy.defaultPostVisibility
+            Migration(from: \.defaultPostVisibility, to: \.$defaultPostVisibility),
-        self.defaultReplyVisibility = legacy.defaultReplyVisibility
+            Migration(from: \.defaultReplyVisibility, to: \.$defaultReplyVisibility),
-        self.requireAttachmentDescriptions = legacy.requireAttachmentDescriptions
+            Migration(from: \.requireAttachmentDescriptions, to: \.$requireAttachmentDescriptions),
-        self.contentWarningCopyMode = legacy.contentWarningCopyMode
+            Migration(from: \.contentWarningCopyMode, to: \.$contentWarningCopyMode),
-        self.mentionReblogger = legacy.mentionReblogger
+            Migration(from: \.mentionReblogger, to: \.$mentionReblogger),
-        self.useTwitterKeyboard = legacy.useTwitterKeyboard
+            Migration(from: \.useTwitterKeyboard, to: \.$useTwitterKeyboard),
             
-        self.attachmentBlurMode = legacy.attachmentBlurMode
+            Migration(from: \.attachmentBlurMode, to: \.$attachmentBlurMode),
-        self.blurMediaBehindContentWarning = legacy.blurMediaBehindContentWarning
+            Migration(from: \.blurMediaBehindContentWarning, to: \.$blurMediaBehindContentWarning),
-        self.automaticallyPlayGifs = legacy.automaticallyPlayGifs
+            Migration(from: \.automaticallyPlayGifs, to: \.$automaticallyPlayGifs),
-        self.showUncroppedMediaInline = legacy.showUncroppedMediaInline
+            Migration(from: \.showUncroppedMediaInline, to: \.$showUncroppedMediaInline),
-        self.showAttachmentBadges = legacy.showAttachmentBadges
+            Migration(from: \.showAttachmentBadges, to: \.$showAttachmentBadges),
-        self.attachmentAltBadgeInverted = legacy.attachmentAltBadgeInverted
+            Migration(from: \.attachmentAltBadgeInverted, to: \.$attachmentAltBadgeInverted),
             
-        self.openLinksInApps = legacy.openLinksInApps
+            Migration(from: \.openLinksInApps, to: \.$openLinksInApps),
-        self.useInAppSafari = legacy.useInAppSafari
+            Migration(from: \.useInAppSafari, to: \.$useInAppSafari),
-        self.inAppSafariAutomaticReaderMode = legacy.inAppSafariAutomaticReaderMode
+            Migration(from: \.inAppSafariAutomaticReaderMode, to: \.$inAppSafariAutomaticReaderMode),
-        self.expandAllContentWarnings = legacy.expandAllContentWarnings
+            Migration(from: \.expandAllContentWarnings, to: \.$expandAllContentWarnings),
-        self.collapseLongPosts = legacy.collapseLongPosts
+            Migration(from: \.collapseLongPosts, to: \.$collapseLongPosts),
-        self.oppositeCollapseKeywords = legacy.oppositeCollapseKeywords
+            Migration(from: \.oppositeCollapseKeywords, to: \.$oppositeCollapseKeywords),
-        self.confirmBeforeReblog = legacy.confirmBeforeReblog
+            Migration(from: \.confirmBeforeReblog, to: \.$confirmBeforeReblog),
-        self.timelineStateRestoration = legacy.timelineStateRestoration
+            Migration(from: \.timelineStateRestoration, to: \.$timelineStateRestoration),
-        self.timelineSyncMode = legacy.timelineSyncMode
+            Migration(from: \.timelineSyncMode, to: \.$timelineSyncMode),
-        self.hideReblogsInTimelines = legacy.hideReblogsInTimelines
+            Migration(from: \.hideReblogsInTimelines, to: \.$hideReblogsInTimelines),
-        self.hideRepliesInTimelines = legacy.hideRepliesInTimelines
+            Migration(from: \.hideRepliesInTimelines, to: \.$hideRepliesInTimelines),
             
-        self.showFavoriteAndReblogCounts = legacy.showFavoriteAndReblogCounts
+            Migration(from: \.showFavoriteAndReblogCounts, to: \.$showFavoriteAndReblogCounts),
-        self.defaultNotificationsMode = legacy.defaultNotificationsMode
+            Migration(from: \.defaultNotificationsMode, to: \.$defaultNotificationsMode),
-        self.grayscaleImages = legacy.grayscaleImages
+            Migration(from: \.grayscaleImages, to: \.$grayscaleImages),
-        self.disableInfiniteScrolling = legacy.disableInfiniteScrolling
+            Migration(from: \.disableInfiniteScrolling, to: \.$disableInfiniteScrolling),
-        self.hideTrends = legacy.hideTrends
+            Migration(from: \.hideTrends, to: \.$hideTrends),
             
-        self.statusContentType = legacy.statusContentType
+            Migration(from: \.statusContentType, to: \.$statusContentType),
-        self.reportErrorsAutomatically = legacy.reportErrorsAutomatically
+            Migration(from: \.reportErrorsAutomatically, to: \.$reportErrorsAutomatically),
-        self.enabledFeatureFlags = legacy.enabledFeatureFlags
+            Migration(from: \.enabledFeatureFlags, to: \.$enabledFeatureFlags),
             
-        self.hasShownLocalTimelineDescription = legacy.hasShownLocalTimelineDescription
+            Migration(from: \.hasShownLocalTimelineDescription, to: \.$hasShownLocalTimelineDescription),
-        self.hasShownFederatedTimelineDescription = legacy.hasShownFederatedTimelineDescription
+            Migration(from: \.hasShownFederatedTimelineDescription, to: \.$hasShownFederatedTimelineDescription),
+        ]
+        
+        for migration in migrations {
+            migration.migrate(from: legacy, to: self)
+        }
+    }
+}
+
+private protocol MigrationProtocol {
+    func migrate(from legacy: LegacyPreferences, to store: PreferenceStore)
+}
+
+private struct Migration<Key: PreferenceKey>: MigrationProtocol where Key.Value: Equatable {
+    let from: KeyPath<LegacyPreferences, Key.Value>
+    let to: KeyPath<PreferenceStore, PreferencePublisher<Key>>
+    
+    func migrate(from legacy: LegacyPreferences, to store: PreferenceStore) {
+        let value = legacy[keyPath: from]
+        if value != Key.defaultValue {
+            Preference.set(enclosingInstance: store, storage: to.appending(path: \.preference), newValue: value)
+        }
+    }
+}
+
+private extension UIUserInterfaceStyle {
+    var theme: Theme {
+        switch self {
+        case .light:
+            .light
+        case .dark:
+            .dark
+        default:
+            .unspecified
+        }
     }
 }

Packages/TuskerPreferences/Sources/TuskerPreferences/Preference.swift

@@ -45,10 +45,10 @@ final class Preference<Key: PreferenceKey>: Codable {
         storage storageKeyPath: ReferenceWritableKeyPath<PreferenceStore, Preference>
     ) -> Key.Value {
         get {
-            get(enclosingInstance: instance, wrapped: wrappedKeyPath, storage: storageKeyPath)
+            get(enclosingInstance: instance, storage: storageKeyPath)
         }
         set {
-            set(enclosingInstance: instance, wrapped: wrappedKeyPath, storage: storageKeyPath, newValue: newValue)
+            set(enclosingInstance: instance, storage: storageKeyPath, newValue: newValue)
             Key.didSet(in: instance, newValue: newValue)
         }
     }
@@ -57,8 +57,7 @@ final class Preference<Key: PreferenceKey>: Codable {
     @inline(__always)
     static func get<Enclosing>(
         enclosingInstance: Enclosing,
-        wrapped: ReferenceWritableKeyPath<Enclosing, Key.Value>,
+        storage: KeyPath<Enclosing, Preference>
-        storage: ReferenceWritableKeyPath<Enclosing, Preference>
     ) -> Key.Value where Enclosing: ObservableObject, Enclosing.ObjectWillChangePublisher == ObservableObjectPublisher {
         let pref = enclosingInstance[keyPath: storage]
         return pref.storedValue ?? Key.defaultValue
@@ -68,8 +67,7 @@ final class Preference<Key: PreferenceKey>: Codable {
     @inline(__always)
     static func set<Enclosing>(
         enclosingInstance: Enclosing,
-        wrapped: ReferenceWritableKeyPath<Enclosing, Key.Value>,
+        storage: KeyPath<Enclosing, Preference>,
-        storage: ReferenceWritableKeyPath<Enclosing, Preference>,
         newValue: Key.Value
     ) where Enclosing: ObservableObject, Enclosing.ObjectWillChangePublisher == ObservableObjectPublisher {
         enclosingInstance.objectWillChange.send()
@@ -77,7 +75,18 @@ final class Preference<Key: PreferenceKey>: Codable {
         pref.storedValue = newValue
     }
     
-    var projectedValue: some Publisher<Key.Value, Never> {
+    var projectedValue: PreferencePublisher<Key> {
-        $storedValue.map { $0 ?? Key.defaultValue }
+        .init(preference: self)
+    }
+}
+
+struct PreferencePublisher<Key: PreferenceKey>: Publisher {
+    typealias Output = Key.Value
+    typealias Failure = Never
+    
+    let preference: Preference<Key>
+    
+    func receive<S>(subscriber: S) where S : Subscriber, Never == S.Failure, Key.Value == S.Input {
+        preference.$storedValue.map { $0 ?? Key.defaultValue }.receive(subscriber: subscriber)
     }
 }

Packages/TuskerPreferences/Tests/TuskerPreferencesTests/PreferenceStoreTests.swift

@@ -21,10 +21,10 @@ final class PreferenceStoreTests: XCTestCase {
         // the acutal subscript expects the enclosingInstance to be a PreferenceStore, so do it manually
         var test: Bool {
             get {
-                Preference.get(enclosingInstance: self, wrapped: \.test, storage: \._test)
+                Preference.get(enclosingInstance: self, storage: \._test)
             }
             set {
-                Preference.set(enclosingInstance: self, wrapped: \.test, storage: \._test, newValue: newValue)
+                Preference.set(enclosingInstance: self, storage: \._test, newValue: newValue)
             }
         }