Initial commit

Author: simonbs

DB/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

DB/.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>DB-Package.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+		<key>DB.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>1</integer>
+		</dict>
+		<key>DBSwiftData.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>2</integer>
+		</dict>
+	</dict>
+	<key>SuppressBuildableAutocreation</key>
+	<dict>
+		<key>DB</key>
+		<dict>
+			<key>primary</key>
+			<true/>
+		</dict>
+	</dict>
+</dict>
+</plist>

DB/.swiftpm/xcode/package.xcworkspace/xcuserdata/simonbs.xcuserdatad/UserInterfaceState.xcuserstate

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+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "DB",
+    platforms: [.iOS(.v17)],
+    products: [
+        .library(name: "DB", targets: [
+            "DB"
+        ]),
+        .library(name: "DBSwiftData", targets: [
+            "DBSwiftData"
+        ])
+    ],
+    targets: [
+        .target(name: "DB"),
+        .target(name: "DBSwiftData", dependencies: [
+            "DB"
+        ])
+    ]
+)

DB/.swiftpm/xcode/xcuserdata/simonbs.xcuserdatad/xcschemes/xcschememanagement.plist

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+import Foundation
+
+public protocol Entry: AnyObject, Identifiable, Equatable, Observable {
+    var date: Date { get }
+    var isEnabled: Bool { get set }
+}

DB/Package.swift

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+import Foundation
+
+public protocol EntryRepository: AnyObject, Observable {
+    associatedtype EntryType: Entry
+    var models: [EntryType] { get }
+    func addEntry()
+    func deleteEntry(_ entry: EntryType)
+    func fetchModels() throws
+}

DB/Sources/DB/Entry.swift

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+import CoreData
+import Foundation
+import SwiftData
+
+@Observable
+final class FetchedResultsController<T: PersistentModel> {
+    private(set) var models: [T] = []
+
+    private let modelContext: ModelContext
+    private let predicate: Predicate<T>?
+    private let sortDescriptors: [SortDescriptor<T>]
+
+    init(
+        modelContext: ModelContext,
+        predicate: Predicate<T>? = nil,
+        sortDescriptors: [SortDescriptor<T>] = []
+    ) {
+        self.modelContext = modelContext
+        self.predicate = predicate
+        self.sortDescriptors = sortDescriptors
+        setupNotification()
+    }
+
+    func fetch() throws {
+        let fetchDesciptor = FetchDescriptor<T>(predicate: predicate, sortBy: sortDescriptors)
+        models = try modelContext.fetch(fetchDesciptor)
+    }
+
+    private func setupNotification() {
+        // Ideally we'd use the ModelContext.didSave notification but this doesn't seem to be sent. 
+        // Last tested with iOS 17 beta 8 on September 4th, 2023.
+        NotificationCenter.default.addObserver(
+            self,
+            selector: #selector(didSave),
+            name: .NSPersistentStoreRemoteChange,
+            object: nil
+        )
+    }
+
+    @objc private func didSave(_ notification: Notification) {
+        do {
+            try fetch()
+        } catch {}
+    }
+}

DB/Sources/DB/EntryRepository.swift

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+import SwiftData
+
+public struct SwiftDataDB {
+    public let modelContainer: ModelContainer
+
+    public init(isStoredInMemoryOnly: Bool) {
+        let modelConfiguration = ModelConfiguration(
+            isStoredInMemoryOnly: isStoredInMemoryOnly
+        )
+        modelContainer = try! ModelContainer(
+            for: SwiftDataEntry.self, 
+            configurations: modelConfiguration
+        )
+    }
+}

DB/Sources/DBSwiftData/Internal/FetchedResultsController.swift

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+import DB
+import Foundation
+import SwiftData
+
+@Model
+public final class SwiftDataEntry: Entry {
+    public let date: Date
+    public var isEnabled = false
+
+    public init() {
+        self.date = Date()
+    }
+}