Merge branch 'feature/core-data-stack' into develop

CoreDataStack/CoreData.xcdatamodeld/CoreData.xcdatamodel/contents

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="17709" systemVersion="20C69" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+    <entity name="HomeTimelineIndex" representedClassName=".HomeTimelineIndex" syncable="YES">
+        <attribute name="createdAt" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="domain" attributeType="String"/>
+        <attribute name="identifier" attributeType="String"/>
+        <attribute name="userIdentifier" attributeType="String"/>
+        <relationship name="toots" maxCount="1" deletionRule="Nullify" destinationEntity="Toots" inverseName="homeTimelineIndex" inverseEntity="Toots"/>
+    </entity>
+    <entity name="MastodonUser" representedClassName=".MastodonUser" syncable="YES">
+        <attribute name="acct" attributeType="String"/>
+        <attribute name="avatar" optional="YES" attributeType="String"/>
+        <attribute name="createdAt" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="domain" attributeType="String"/>
+        <attribute name="id" attributeType="String"/>
+        <attribute name="identifier" attributeType="String"/>
+        <attribute name="updatedAt" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="username" attributeType="String"/>
+        <relationship name="toots" toMany="YES" deletionRule="Nullify" destinationEntity="Toots" inverseName="author" inverseEntity="Toots"/>
+    </entity>
+    <entity name="Toots" representedClassName=".Toots" syncable="YES">
+        <attribute name="content" attributeType="String"/>
+        <attribute name="createdAt" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="domain" attributeType="String"/>
+        <attribute name="id" attributeType="String"/>
+        <attribute name="identifier" attributeType="String"/>
+        <attribute name="updatedAt" attributeType="Date" usesScalarValueType="NO"/>
+        <relationship name="author" maxCount="1" deletionRule="Nullify" destinationEntity="MastodonUser" inverseName="toots" inverseEntity="MastodonUser"/>
+        <relationship name="homeTimelineIndex" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="HomeTimelineIndex" inverseName="toots" inverseEntity="HomeTimelineIndex"/>
+    </entity>
+    <elements>
+        <element name="Toots" positionX="-248.4609375" positionY="17.3203125" width="128" height="163"/>
+        <element name="MastodonUser" positionX="9.34375" positionY="71.8828125" width="128" height="178"/>
+        <element name="HomeTimelineIndex" positionX="-108" positionY="135" width="128" height="118"/>
+    </elements>
+</model>

CoreDataStack/CoreDataStack.h

@@ -0,0 +1,18 @@
+//
+//  CoreDataStack.h
+//  CoreDataStack
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+#import <Foundation/Foundation.h>
+
+//! Project version number for CoreDataStack.
+FOUNDATION_EXPORT double CoreDataStackVersionNumber;
+
+//! Project version string for CoreDataStack.
+FOUNDATION_EXPORT const unsigned char CoreDataStackVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <CoreDataStack/PublicHeader.h>
+
+

CoreDataStack/CoreDataStack.swift

@@ -0,0 +1,101 @@
+//
+//  CoreDataStack.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import os
+import Foundation
+import CoreData
+
+public final class CoreDataStack {
+    
+    private(set) var storeDescriptions: [NSPersistentStoreDescription]
+    
+    init(persistentStoreDescriptions storeDescriptions: [NSPersistentStoreDescription]) {
+        self.storeDescriptions = storeDescriptions
+    }
+    
+    public convenience init(databaseName: String = "shared") {
+        let storeURL = URL.storeURL(for: "group.com.joinmastodon.mastodon-temp", databaseName: databaseName)
+        let storeDescription = NSPersistentStoreDescription(url: storeURL)
+        self.init(persistentStoreDescriptions: [storeDescription])
+    }
+    
+    public private(set) lazy var persistentContainer: NSPersistentContainer = {
+        /*
+         The persistent container for the application. This implementation
+         creates and returns a container, having loaded the store for the
+         application to it. This property is optional since there are legitimate
+         error conditions that could cause the creation of the store to fail.
+         */
+        let container = CoreDataStack.persistentContainer()
+        CoreDataStack.configure(persistentContainer: container, storeDescriptions: storeDescriptions)
+        CoreDataStack.load(persistentContainer: container)
+
+        return container
+    }()
+
+    static func persistentContainer() -> NSPersistentContainer {
+        let bundles = [Bundle(for: Toots.self)]
+        guard let managedObjectModel = NSManagedObjectModel.mergedModel(from: bundles) else {
+            fatalError("cannot locate bundles")
+        }
+        
+        let container = NSPersistentContainer(name: "CoreDataStack", managedObjectModel: managedObjectModel)
+        return container
+    }
+    
+    static func configure(persistentContainer container: NSPersistentContainer, storeDescriptions: [NSPersistentStoreDescription]) {
+        container.persistentStoreDescriptions = storeDescriptions
+    }
+    
+    static func load(persistentContainer container: NSPersistentContainer) {
+        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
+            if let error = error as NSError? {
+                // Replace this implementation with code to handle the error appropriately.
+                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
+                
+                /*
+                 Typical reasons for an error here include:
+                 * The parent directory does not exist, cannot be created, or disallows writing.
+                 * The persistent store is not accessible, due to permissions or data protection when the device is locked.
+                 * The device is out of space.
+                 * The store could not be migrated to the current model version.
+                 Check the error message to determine what the actual problem was.
+                 */
+                if let reason = error.userInfo["reason"] as? String,
+                   (reason == "Can't find mapping model for migration" || reason == "Persistent store migration failed, missing mapping model.")  {
+                    if let storeDescription = container.persistentStoreDescriptions.first, let url = storeDescription.url {
+                        try? container.persistentStoreCoordinator.destroyPersistentStore(at: url, ofType: NSSQLiteStoreType, options: nil)
+                        os_log("%{public}s[%{public}ld], %{public}s: cannot migrate model. rebuild database…", ((#file as NSString).lastPathComponent), #line, #function)
+                    } else {
+                        assertionFailure()
+                    }
+                }
+
+                fatalError("Unresolved error \(error), \(error.userInfo)")
+            }
+            
+            container.viewContext.mergePolicy = NSMergePolicy.mergeByPropertyObjectTrump
+            
+            // it's looks like the remote notification only trigger when app enter and leave background
+            container.viewContext.automaticallyMergesChangesFromParent = true
+            
+            os_log("%{public}s[%{public}ld], %{public}s: %s", ((#file as NSString).lastPathComponent), #line, #function, storeDescription.debugDescription)
+        })
+    }
+    
+}
+
+extension CoreDataStack {
+    
+    public func rebuild() {
+        let oldStoreURL = persistentContainer.persistentStoreCoordinator.url(for: persistentContainer.persistentStoreCoordinator.persistentStores.first!)
+        try! persistentContainer.persistentStoreCoordinator.destroyPersistentStore(at: oldStoreURL, ofType: NSSQLiteStoreType, options: nil)
+        
+        CoreDataStack.load(persistentContainer: persistentContainer)
+    }
+
+}

CoreDataStack/Entity/HomeTimelineIndex.swift

@@ -0,0 +1,64 @@
+//
+//  HomeTimelineIndex.swift
+//  CoreDataStack
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+import Foundation
+import CoreData
+
+final class HomeTimelineIndex: NSManagedObject {
+    
+    public typealias ID = String
+    @NSManaged public private(set) var identifier: ID
+    @NSManaged public private(set) var domain: String
+    @NSManaged public private(set) var userIdentifier: String
+    
+    @NSManaged public private(set) var createdAt: Date
+    
+    // many-to-one relationship
+    @NSManaged public private(set) var toots: Toots
+    
+}
+
+extension HomeTimelineIndex {
+    
+    @discardableResult
+    public static func insert(
+        into context: NSManagedObjectContext,
+        property: Property,
+        toots: Toots
+    ) -> HomeTimelineIndex {
+        let index: HomeTimelineIndex = context.insertObject()
+        
+        index.identifier = property.identifier
+        index.domain = property.domain
+        index.userIdentifier = toots.author.identifier
+        index.createdAt = toots.createdAt
+        
+        index.toots = toots
+        
+        return index
+    }
+    
+}
+
+extension HomeTimelineIndex {
+    public struct Property {
+        public let identifier: String
+        public let domain: String
+    
+        public init(domain: String) {
+            self.identifier = UUID().uuidString + "@" + domain
+            self.domain = domain
+        }
+    }
+}
+
+extension HomeTimelineIndex: Managed {
+    public static var defaultSortDescriptors: [NSSortDescriptor] {
+        return [NSSortDescriptor(keyPath: \HomeTimelineIndex.createdAt, ascending: false)]
+    }
+}
+

CoreDataStack/Entity/MastodonUser.swift

@@ -0,0 +1,96 @@
+//
+//  MastodonUser.swift
+//  CoreDataStack
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+import Foundation
+import CoreData
+
+final class MastodonUser: NSManagedObject {
+    
+    public typealias ID = String
+    @NSManaged public private(set) var identifier: ID
+    @NSManaged public private(set) var domain: String
+    
+    @NSManaged public private(set) var id: String
+    @NSManaged public private(set) var acct: String
+    @NSManaged public private(set) var username: String
+    @NSManaged public private(set) var displayName: String?
+    
+    @NSManaged public private(set) var createdAt: Date
+    @NSManaged public private(set) var updatedAt: Date
+    
+    @NSManaged public private(set) var toots: Set<Toots>?
+
+}
+
+extension MastodonUser {
+
+    @discardableResult
+    public static func insert(
+        into context: NSManagedObjectContext,
+        property: Property
+    ) -> MastodonUser {
+        let user: MastodonUser = context.insertObject()
+    
+        user.identifier = property.identifier
+        user.domain = property.domain
+        
+        user.id = property.id
+        user.acct = property.acct
+        user.username = property.username
+        user.displayName = property.displayName
+        
+        user.createdAt = property.createdAt
+        user.updatedAt = property.networkDate
+
+        return user
+    }
+    
+}
+
+extension MastodonUser {
+    public struct Property {
+        public let identifier: String
+        public let domain: String
+        
+        public let id: String
+        public let acct: String
+        public let username: String
+        public let displayName: String?
+        
+        public let createdAt: Date
+        public let networkDate: Date
+        
+        public init(
+            id: String,
+            domain: String,
+            acct: String,
+            username: String,
+            displayName: String?,
+            content: String,
+            createdAt: Date,
+            networkDate: Date
+        ) {
+            self.identifier = id + "@" + domain
+            self.domain = domain
+            self.id = id
+            self.acct = acct
+            self.username = username
+            self.displayName = displayName.flatMap { displayName in
+                return displayName.isEmpty ? nil : displayName
+            }
+            self.createdAt = createdAt
+            self.networkDate = networkDate
+        }
+    }
+}
+
+extension MastodonUser: Managed {
+    public static var defaultSortDescriptors: [NSSortDescriptor] {
+        return [NSSortDescriptor(keyPath: \MastodonUser.createdAt, ascending: false)]
+    }
+}
+

CoreDataStack/Entity/Toots.swift

@@ -0,0 +1,88 @@
+//
+//  Toots.swift
+//  CoreDataStack
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+import Foundation
+import CoreData
+
+final class Toots: NSManagedObject {
+    
+    public typealias ID = String
+    @NSManaged public private(set) var identifier: ID
+    @NSManaged public private(set) var domain: String
+    
+    @NSManaged public private(set) var id: String
+    @NSManaged public private(set) var content: String
+    
+    @NSManaged public private(set) var createdAt: Date
+    @NSManaged public private(set) var updatedAt: Date
+    
+    // many-to-one relationship
+    @NSManaged public private(set) var author: MastodonUser
+    
+    // one-to-many relationship
+    @NSManaged public private(set) var homeTimelineIndexes: Set<HomeTimelineIndex>?
+    
+}
+
+extension Toots {
+    
+    @discardableResult
+    public static func insert(
+        into context: NSManagedObjectContext,
+        property: Property,
+        author: MastodonUser
+    ) -> Toots {
+        let toots: Toots = context.insertObject()
+        
+        toots.identifier = property.identifier
+        toots.domain = property.domain
+        
+        toots.id = property.id
+        toots.content = property.content
+        toots.createdAt = property.createdAt
+        toots.updatedAt = property.networkDate
+        
+        toots.author = author
+        
+        return toots
+    }
+    
+}
+
+extension Toots {
+    public struct Property {
+        public let identifier: String
+        public let domain: String
+        
+        public let id: String
+        public let content: String
+        public let createdAt: Date
+        public let networkDate: Date
+        
+        public init(
+            id: String,
+            domain: String,
+            content: String,
+            createdAt: Date,
+            networkDate: Date
+        ) {
+            self.identifier = id + "@" + domain
+            self.domain = domain
+            self.id = id
+            self.content = content
+            self.createdAt = createdAt
+            self.networkDate = networkDate
+        }
+    }
+}
+
+extension Toots: Managed {
+    public static var defaultSortDescriptors: [NSSortDescriptor] {
+        return [NSSortDescriptor(keyPath: \Toots.createdAt, ascending: false)]
+    }
+}
+

CoreDataStack/Extension/Collection.swift

@@ -0,0 +1,30 @@
+//
+//  Collection.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2020-10-14.
+//  Copyright © 2020 Twidere. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+extension Collection where Iterator.Element: NSManagedObject {
+    public func fetchFaults() {
+        guard !self.isEmpty else { return }
+        guard let context = self.first?.managedObjectContext else {
+            fatalError("Managed object must have context")
+        }
+        let faults = self.filter { $0.isFault }
+        guard let object = faults.first else { return }
+        let request = NSFetchRequest<Iterator.Element>()
+        request.entity = object.entity
+        request.returnsObjectsAsFaults = false
+        request.predicate = NSPredicate(format: "self in %@", faults)
+        do {
+            let _ = try context.fetch(request)
+        } catch {
+            assertionFailure(error.localizedDescription)
+        }
+    }
+}

CoreDataStack/Extension/NSManagedObjectContext.swift

@@ -0,0 +1,50 @@
+//
+//  NSManagedObjectContext.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2020-8-10.
+//  Copyright © 2020 Dimension. All rights reserved.
+//
+
+import os
+import Foundation
+import Combine
+import CoreData
+
+extension NSManagedObjectContext {
+    public func insert<T: NSManagedObject>() -> T where T: Managed {
+        guard let object = NSEntityDescription.insertNewObject(forEntityName: T.entityName, into: self) as? T else {
+            fatalError("cannot insert object: \(T.self)")
+        }
+        
+        return object
+    }
+    
+    public func saveOrRollback() throws {
+        do {
+            guard hasChanges else {
+                return
+            }
+            try save()
+        } catch {
+            rollback()
+            
+            os_log("%{public}s[%{public}ld], %{public}s: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
+            throw error
+        }
+    }
+    
+    public func performChanges(block: @escaping () -> Void) -> Future<Result<Void, Error>, Never> {
+        Future { promise in
+            self.perform {
+                block()
+                do {
+                    try self.saveOrRollback()
+                    promise(.success(Result.success(())))
+                } catch {
+                    promise(.success(Result.failure(error)))
+                }
+            }
+        }
+    }
+}

CoreDataStack/Extension/URL.swift

@@ -0,0 +1,23 @@
+//
+//  URL.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import Foundation
+
+public extension URL {
+    
+    /// Returns a URL for the given app group and database pointing to the sqlite database.
+    static func storeURL(for appGroup: String, databaseName: String) -> URL {
+        guard let fileContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup) else {
+            fatalError("Shared file container could not be created.")
+        }
+        
+        return fileContainer
+            .appendingPathComponent("Databases", isDirectory: true)
+            .appendingPathComponent("\(databaseName).sqlite")
+    }
+    
+}

CoreDataStack/Info.plist

@@ -0,0 +1,22 @@
+<?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>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+</dict>
+</plist>

CoreDataStack/Protocol/Managed.swift

@@ -0,0 +1,82 @@
+//
+//  Managed.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2020-8-6.
+//  Copyright © 2020 Dimension. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+public protocol Managed: class, NSFetchRequestResult {
+    static var entityName: String { get }
+    static var defaultSortDescriptors: [NSSortDescriptor] { get }
+}
+
+extension Managed {
+    public static var defaultSortDescriptors: [NSSortDescriptor] {
+        return []
+    }
+    
+    public static var sortedFetchRequest: NSFetchRequest<Self> {
+        let request = NSFetchRequest<Self>(entityName: entityName)
+        request.sortDescriptors = defaultSortDescriptors
+        return request
+    }
+    
+}
+
+extension NSManagedObjectContext {
+    public func insertObject<T: NSManagedObject>() -> T where T: Managed {
+        guard let object = NSEntityDescription.insertNewObject(forEntityName: T.entityName, into: self) as? T else {
+            fatalError("Wrong object type")
+        }
+        
+        return object
+    }
+}
+
+extension Managed where Self: NSManagedObject {
+    public static var entityName: String { return entity().name! }
+}
+
+extension Managed where Self: NSManagedObject {
+    public static func findOrCreate(in context: NSManagedObjectContext, matching predicate: NSPredicate, configure: (Self) -> Void) -> Self {
+        guard let object = findOrFetch(in: context, matching: predicate) else {
+            let newObject: Self = context.insertObject()
+            configure(newObject)
+            return newObject
+        }
+        
+        return object
+    }
+    
+    public static func findOrFetch(in context: NSManagedObjectContext, matching predicate: NSPredicate) -> Self? {
+        guard let object = materializedObject(in: context, matching: predicate) else {
+            return fetch(in: context) { request in
+                request.predicate = predicate
+                request.returnsObjectsAsFaults = false
+                request.fetchLimit = 1
+            }.first
+        }
+        
+        return object
+    }
+    
+    public static func materializedObject(in context: NSManagedObjectContext, matching predicate: NSPredicate) -> Self? {
+        for object in context.registeredObjects where !object.isFault {
+            guard let result = object as? Self, predicate.evaluate(with: result) else { continue }
+            return result
+        }
+        
+        return nil
+    }
+    
+    public static func fetch(in context: NSManagedObjectContext, configurationBlock: (NSFetchRequest<Self>) -> Void = { _ in }) -> [Self] {
+        let request = NSFetchRequest<Self>(entityName: Self.entityName)
+        configurationBlock(request)
+        return try! context.fetch(request)
+    }
+}
+

CoreDataStack/Protocol/NetworkUpdatable.swift

@@ -0,0 +1,12 @@
+//
+//  NetworkUpdatable.swift
+//  CoreDataStack
+//
+//  Created by Cirno MainasuK on 2020-9-4.
+//
+
+import Foundation
+
+public protocol NetworkUpdatable {
+    var networkDate: Date { get }
+}

CoreDataStackTests/CoreDataStackTests.swift

@@ -0,0 +1,33 @@
+//
+//  CoreDataStackTests.swift
+//  CoreDataStackTests
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+import XCTest
+@testable import CoreDataStack
+
+class CoreDataStackTests: XCTestCase {
+
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+
+}

CoreDataStackTests/Info.plist

@@ -0,0 +1,22 @@
+<?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>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

Mastodon.xcodeproj/project.pbxproj

@@ -12,7 +12,6 @@
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 		7A9135D4559750AF07CA9BE4 /* Pods_Mastodon.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 602D783BEC22881EBAD84419 /* Pods_Mastodon.framework */; };
 		DB3D0FF325BAA61700EAA174 /* AlamofireImage in Frameworks */ = {isa = PBXBuildFile; productRef = DB3D0FF225BAA61700EAA174 /* AlamofireImage */; };
-		DB3D100025BAA6DA00EAA174 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB3D0FFF25BAA6DA00EAA174 /* ViewController.swift */; };
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@@ -180,8 +281,12 @@
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+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = CoreDataStack;
+			productName = CoreDataStack;
+			productReference = DB89B9EE25C10FD0008580ED /* CoreDataStack.framework */;
+			productType = "com.apple.product-type.framework";
+		};
+		DB89B9F525C10FD0008580ED /* CoreDataStackTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = DB89BA0925C10FD0008580ED /* Build configuration list for PBXNativeTarget "CoreDataStackTests" */;
+			buildPhases = (
+				DB89B9F225C10FD0008580ED /* Sources */,
+				DB89B9F325C10FD0008580ED /* Frameworks */,
+				DB89B9F425C10FD0008580ED /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				DB89B9F925C10FD0008580ED /* PBXTargetDependency */,
+				DB89B9FB25C10FD0008580ED /* PBXTargetDependency */,
+			);
+			name = CoreDataStackTests;
+			productName = CoreDataStackTests;
+			productReference = DB89B9F625C10FD0008580ED /* CoreDataStackTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -293,6 +544,14 @@
 						CreatedOnToolsVersion = 12.4;
 						TestTargetID = DB427DD125BAA00100D1B89D;
 					};
+					DB89B9ED25C10FD0008580ED = {
+						CreatedOnToolsVersion = 12.4;
+						LastSwiftMigration = 1240;
+					};
+					DB89B9F525C10FD0008580ED = {
+						CreatedOnToolsVersion = 12.4;
+						TestTargetID = DB427DD125BAA00100D1B89D;
+					};
 				};
 			};
 			buildConfigurationList = DB427DCD25BAA00100D1B89D /* Build configuration list for PBXProject "Mastodon" */;
@@ -314,6 +573,8 @@
 				DB427DD125BAA00100D1B89D /* Mastodon */,
 				DB427DE725BAA00100D1B89D /* MastodonTests */,
 				DB427DF225BAA00100D1B89D /* MastodonUITests */,
+				DB89B9ED25C10FD0008580ED /* CoreDataStack */,
+				DB89B9F525C10FD0008580ED /* CoreDataStackTests */,
 			);
 		};
 /* End PBXProject section */
@@ -344,6 +605,20 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		DB89B9EC25C10FD0008580ED /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		DB89B9F425C10FD0008580ED /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
@@ -471,8 +746,15 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				DB3D100025BAA6DA00EAA174 /* ViewController.swift in Sources */,
+				DB8AF53025C13561002E6C99 /* AppContext.swift in Sources */,
+				DB8AF52F25C13561002E6C99 /* DocumentStore.swift in Sources */,
+				DB8AF55D25C138B7002E6C99 /* UIViewController.swift in Sources */,
+				DB8AF55025C13703002E6C99 /* MainTabBarController.swift in Sources */,
+				DB8AF54525C13647002E6C99 /* NeedsDependency.swift in Sources */,
 				DB427DD625BAA00100D1B89D /* AppDelegate.swift in Sources */,
+				DB8AF54425C13647002E6C99 /* SceneCoordinator.swift in Sources */,
+				DB8AF52E25C13561002E6C99 /* ViewStateStore.swift in Sources */,
+				DB8AF55725C137A8002E6C99 /* HomeViewController.swift in Sources */,
 				DB3D102525BAA7B400EAA174 /* Strings.swift in Sources */,
 				DB3D102425BAA7B400EAA174 /* Assets.swift in Sources */,
 				DB427DD825BAA00100D1B89D /* SceneDelegate.swift in Sources */,
@@ -495,6 +777,31 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		DB89B9EA25C10FD0008580ED /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				DB89BA1225C1105C008580ED /* CoreDataStack.swift in Sources */,
+				DB89BA1C25C1107F008580ED /* NSManagedObjectContext.swift in Sources */,
+				DB89BA3725C1145C008580ED /* CoreData.xcdatamodeld in Sources */,
+				DB8AF52525C131D1002E6C99 /* MastodonUser.swift in Sources */,
+				DB89BA1B25C1107F008580ED /* Collection.swift in Sources */,
+				DB89BA2725C110B4008580ED /* Toots.swift in Sources */,
+				DB89BA4425C1165F008580ED /* Managed.swift in Sources */,
+				DB89BA4325C1165F008580ED /* NetworkUpdatable.swift in Sources */,
+				DB8AF56825C13E2A002E6C99 /* HomeTimelineIndex.swift in Sources */,
+				DB89BA1D25C1107F008580ED /* URL.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		DB89B9F225C10FD0008580ED /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				DB89B9FE25C10FD0008580ED /* CoreDataStackTests.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
@@ -508,6 +815,21 @@
 			target = DB427DD125BAA00100D1B89D /* Mastodon */;
 			targetProxy = DB427DF425BAA00100D1B89D /* PBXContainerItemProxy */;
 		};
+		DB89B9F925C10FD0008580ED /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = DB89B9ED25C10FD0008580ED /* CoreDataStack */;
+			targetProxy = DB89B9F825C10FD0008580ED /* PBXContainerItemProxy */;
+		};
+		DB89B9FB25C10FD0008580ED /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = DB427DD125BAA00100D1B89D /* Mastodon */;
+			targetProxy = DB89B9FA25C10FD0008580ED /* PBXContainerItemProxy */;
+		};
+		DB89BA0225C10FD0008580ED /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = DB89B9ED25C10FD0008580ED /* CoreDataStack */;
+			targetProxy = DB89BA0125C10FD0008580ED /* PBXContainerItemProxy */;
+		};
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
@@ -589,7 +911,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -644,7 +966,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = iphoneos;
@@ -660,6 +982,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = Mastodon/Mastodon.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 7LFDZ96332;
 				INFOPLIST_FILE = Mastodon/Info.plist;
@@ -681,6 +1004,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = Mastodon/Mastodon.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 7LFDZ96332;
 				INFOPLIST_FILE = Mastodon/Info.plist;
@@ -700,7 +1024,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = EC6E707B68A67DB08EC288FA /* Pods-MastodonTests.debug.xcconfig */;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 7LFDZ96332;
@@ -722,7 +1045,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 9780A4C98FFC65B32B50D1C0 /* Pods-MastodonTests.release.xcconfig */;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 7LFDZ96332;
@@ -780,6 +1102,103 @@
 			};
 			name = Release;
 		};
+		DB89BA0625C10FD0008580ED /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = 7LFDZ96332;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = CoreDataStack/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = org.joinmastodon.CoreDataStack;
+				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				SKIP_INSTALL = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Debug;
+		};
+		DB89BA0725C10FD0008580ED /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = 7LFDZ96332;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				INFOPLIST_FILE = CoreDataStack/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = org.joinmastodon.CoreDataStack;
+				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Release;
+		};
+		DB89BA0A25C10FD0008580ED /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 7LFDZ96332;
+				INFOPLIST_FILE = CoreDataStackTests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = org.joinmastodon.CoreDataStackTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Mastodon.app/Mastodon";
+			};
+			name = Debug;
+		};
+		DB89BA0B25C10FD0008580ED /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 7LFDZ96332;
+				INFOPLIST_FILE = CoreDataStackTests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = org.joinmastodon.CoreDataStackTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Mastodon.app/Mastodon";
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -819,6 +1238,24 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
+		DB89BA0525C10FD0008580ED /* Build configuration list for PBXNativeTarget "CoreDataStack" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				DB89BA0625C10FD0008580ED /* Debug */,
+				DB89BA0725C10FD0008580ED /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		DB89BA0925C10FD0008580ED /* Build configuration list for PBXNativeTarget "CoreDataStackTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				DB89BA0A25C10FD0008580ED /* Debug */,
+				DB89BA0B25C10FD0008580ED /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 /* End XCConfigurationList section */
 
 /* Begin XCRemoteSwiftPackageReference section */
@@ -843,6 +1280,19 @@
 			productName = AlamofireImage;
 		};
 /* End XCSwiftPackageProductDependency section */
+
+/* Begin XCVersionGroup section */
+		DB89BA3525C1145C008580ED /* CoreData.xcdatamodeld */ = {
+			isa = XCVersionGroup;
+			children = (
+				DB89BA3625C1145C008580ED /* CoreData.xcdatamodel */,
+			);
+			currentVersion = DB89BA3625C1145C008580ED /* CoreData.xcdatamodel */;
+			path = CoreData.xcdatamodeld;
+			sourceTree = "<group>";
+			versionGroupType = wrapper.xcdatamodel;
+		};
+/* End XCVersionGroup section */
 	};
 	rootObject = DB427DCA25BAA00100D1B89D /* Project object */;
 }

Mastodon.xcodeproj/xcuserdata/mainasuk.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -4,10 +4,15 @@
 <dict>
 	<key>SchemeUserState</key>
 	<dict>
+		<key>CoreDataStack.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>8</integer>
+		</dict>
 		<key>Mastodon.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>5</integer>
+			<integer>9</integer>
 		</dict>
 	</dict>
 </dict>

Mastodon/Coordinator/NeedsDependency.swift

@@ -0,0 +1,28 @@
+//
+//  NeedsDependency.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import UIKit
+
+protocol NeedsDependency: class {
+    var context: AppContext! { get set }
+    var coordinator: SceneCoordinator! { get set }
+}
+
+extension UISceneSession {
+    private struct AssociatedKeys {
+        static var sceneCoordinator = "SceneCoordinator"
+    }
+    
+    weak var sceneCoordinator: SceneCoordinator? {
+        get {
+            return objc_getAssociatedObject(self, &AssociatedKeys.sceneCoordinator) as? SceneCoordinator
+        }
+        set {
+            objc_setAssociatedObject(self, &AssociatedKeys.sceneCoordinator, newValue, .OBJC_ASSOCIATION_ASSIGN)
+        }
+    }
+}

Mastodon/Coordinator/SceneCoordinator.swift

@@ -0,0 +1,124 @@
+//
+//  SceneCoordinator.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+
+import UIKit
+import SafariServices
+
+final public class SceneCoordinator {
+    
+    private weak var scene: UIScene!
+    private weak var sceneDelegate: SceneDelegate!
+    private weak var appContext: AppContext!
+    
+    let id = UUID().uuidString
+    
+    init(scene: UIScene, sceneDelegate: SceneDelegate, appContext: AppContext) {
+        self.scene = scene
+        self.sceneDelegate = sceneDelegate
+        self.appContext = appContext
+        
+        scene.session.sceneCoordinator = self
+    }
+}
+
+extension SceneCoordinator {
+    enum Transition {
+        case show                           // push
+        case showDetail                     // replace
+        case modal(animated: Bool, completion: (() -> Void)? = nil)
+        case custom(transitioningDelegate: UIViewControllerTransitioningDelegate)
+        case customPush
+        case safariPresent(animated: Bool, completion: (() -> Void)? = nil)
+        case activityViewControllerPresent(animated: Bool, completion: (() -> Void)? = nil)
+        case alertController(animated: Bool, completion: (() -> Void)? = nil)
+    }
+    
+    enum Scene {
+        
+    }
+}
+
+extension SceneCoordinator {
+    
+    func setup() {
+        let viewController = MainTabBarController(context: appContext, coordinator: self)
+        sceneDelegate.window?.rootViewController = viewController
+    }
+    
+    @discardableResult
+    func present(scene: Scene, from sender: UIViewController?, transition: Transition) -> UIViewController? {
+        guard let viewController = get(scene: scene) else {
+            return nil
+        }
+        guard var presentingViewController = sender ?? sceneDelegate.window?.rootViewController?.topMost else {
+            return nil
+        }
+        
+        if let mainTabBarController = presentingViewController as? MainTabBarController,
+           let navigationController = mainTabBarController.selectedViewController as? UINavigationController,
+           let topViewController = navigationController.topViewController {
+            presentingViewController = topViewController
+        }
+        
+        switch transition {
+        case .show:
+            presentingViewController.show(viewController, sender: sender)
+            
+        case .showDetail:
+            let navigationController = UINavigationController(rootViewController: viewController)
+            presentingViewController.showDetailViewController(navigationController, sender: sender)
+            
+        case .modal(let animated, let completion):
+            let modalNavigationController = UINavigationController(rootViewController: viewController)
+            if let adaptivePresentationControllerDelegate = viewController as? UIAdaptivePresentationControllerDelegate {
+                modalNavigationController.presentationController?.delegate = adaptivePresentationControllerDelegate
+            }
+            presentingViewController.present(modalNavigationController, animated: animated, completion: completion)
+            
+        case .custom(let transitioningDelegate):
+            viewController.modalPresentationStyle = .custom
+            viewController.transitioningDelegate = transitioningDelegate
+            sender?.present(viewController, animated: true, completion: nil)
+            
+        case .customPush:
+            // set delegate in view controller
+            assert(sender?.navigationController?.delegate != nil)
+            sender?.navigationController?.pushViewController(viewController, animated: true)
+            
+        case .safariPresent(let animated, let completion):
+            presentingViewController.present(viewController, animated: animated, completion: completion)
+            
+        case .activityViewControllerPresent(let animated, let completion):
+            presentingViewController.present(viewController, animated: animated, completion: completion)
+            
+        case .alertController(let animated, let completion):
+            presentingViewController.present(viewController, animated: animated, completion: completion)
+        }
+        
+        return viewController
+    }
+
+}
+
+private extension SceneCoordinator {
+    
+    func get(scene: Scene) -> UIViewController? {
+        let viewController: UIViewController?
+        
+        // TODO:
+        viewController = nil
+        
+        setupDependency(for: viewController as? NeedsDependency)
+
+        return viewController
+    }
+    
+    private func setupDependency(for needs: NeedsDependency?) {
+        needs?.context = appContext
+        needs?.coordinator = self
+    }
+    
+}

Mastodon/Extension/UIViewController.swift

@@ -0,0 +1,67 @@
+//
+//  UIViewController.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import UIKit
+
+extension UIViewController {
+    
+    /// Returns the top most view controller from given view controller's stack.
+    var topMost: UIViewController? {
+        // presented view controller
+        if let presentedViewController = presentedViewController {
+            return presentedViewController.topMost
+        }
+        
+        // UITabBarController
+        if let tabBarController = self as? UITabBarController,
+            let selectedViewController = tabBarController.selectedViewController {
+            return selectedViewController.topMost
+        }
+        
+        // UINavigationController
+        if let navigationController = self as? UINavigationController,
+            let visibleViewController = navigationController.visibleViewController {
+            return visibleViewController.topMost
+        }
+        
+        // UIPageController
+        if let pageViewController = self as? UIPageViewController,
+            pageViewController.viewControllers?.count == 1 {
+            return pageViewController.viewControllers?.first?.topMost ?? self
+        }
+        
+        // child view controller
+        for subview in self.view?.subviews ?? [] {
+            if let childViewController = subview.next as? UIViewController {
+                return childViewController.topMost
+            }
+        }
+        
+        return self
+    }
+    
+}
+
+extension UIViewController {
+    
+    /// https://bluelemonbits.com/2018/08/26/inserting-cells-at-the-top-of-a-uitableview-with-no-scrolling/
+    static func topVisibleTableViewCellIndexPath(in tableView: UITableView, navigationBar: UINavigationBar) -> IndexPath? {
+        let navigationBarRectInTableView = tableView.convert(navigationBar.bounds, from: navigationBar)
+        let navigationBarMaxYPosition = CGPoint(x: 0, y: navigationBarRectInTableView.origin.y + navigationBarRectInTableView.size.height + 1)  // +1pt for UIKit cell locate
+        let mostTopVisiableIndexPath = tableView.indexPathForRow(at: navigationBarMaxYPosition)
+        return mostTopVisiableIndexPath
+    }
+    
+    static func tableViewCellOriginOffsetToWindowTop(in tableView: UITableView, at indexPath: IndexPath, navigationBar: UINavigationBar) -> CGFloat {
+        let rectForTopRow = tableView.rectForRow(at: indexPath)
+        let navigationBarRectInTableView = tableView.convert(navigationBar.bounds, from: navigationBar)
+        let navigationBarMaxYPosition = CGPoint(x: 0, y: navigationBarRectInTableView.origin.y + navigationBarRectInTableView.size.height)      // without +1pt
+        let differenceBetweenTopRowAndNavigationBar = rectForTopRow.origin.y - navigationBarMaxYPosition.y
+        return differenceBetweenTopRowAndNavigationBar
+    }
+    
+}

Mastodon/Mastodon.entitlements

@@ -0,0 +1,10 @@
+<?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>com.apple.security.application-groups</key>
+	<array>
+		<string>group.org.joinmastodon.mastodon-temp</string>
+	</array>
+</dict>
+</plist>

Mastodon/Scene/HomeViewController.swift

@@ -0,0 +1,27 @@
+//
+//  HomeViewController.swift
+//  Mastodon
+//
+//  Created by MainasuK Cirno on 2021/1/27.
+//
+
+import UIKit
+
+final class HomeViewController: UIViewController, NeedsDependency {
+    
+    weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
+    weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
+    
+}
+
+
+extension HomeViewController {
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        title = "Home"
+        view.backgroundColor = .systemBackground
+    }
+    
+}

Mastodon/Scene/MainTab/MainTabBarController.swift

@@ -0,0 +1,89 @@
+//
+//  MainTabBarController.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import os.log
+import UIKit
+import Combine
+import SafariServices
+
+class MainTabBarController: UITabBarController {
+    
+    var disposeBag = Set<AnyCancellable>()
+    
+    weak var context: AppContext!
+    weak var coordinator: SceneCoordinator!
+        
+    enum Tab: Int, CaseIterable {
+        case home
+        
+        
+        var title: String {
+            switch self {
+            case .home:     return "Home"
+            }
+        }
+        
+        var image: UIImage {
+            switch self {
+            case .home:     return UIImage(systemName: "house")!
+            }
+        }
+        
+        func viewController(context: AppContext, coordinator: SceneCoordinator) -> UIViewController {
+            let viewController: UIViewController
+            switch self {
+            case .home:
+                let _viewController = HomeViewController()
+                _viewController.context = context
+                _viewController.coordinator = coordinator
+                viewController = _viewController
+            }
+            viewController.title = self.title
+            return UINavigationController(rootViewController: viewController)
+        }
+    }
+    
+    init(context: AppContext, coordinator: SceneCoordinator) {
+        self.context = context
+        self.coordinator = coordinator
+        super.init(nibName: nil, bundle: nil)
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+}
+
+extension MainTabBarController {
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        view.backgroundColor = .systemBackground
+        
+        let tabs = Tab.allCases
+        let viewControllers: [UIViewController] = tabs.map { tab in
+            let viewController = tab.viewController(context: context, coordinator: coordinator)
+            viewController.tabBarItem.title = "" // set text to empty string for image only style (SDK failed to layout when set to nil)
+            viewController.tabBarItem.image = tab.image
+            return viewController
+        }
+        setViewControllers(viewControllers, animated: false)
+        selectedIndex = 0
+        
+        // TODO: custom accent color
+        let tabBarAppearance = UITabBarAppearance()
+        tabBarAppearance.configureWithDefaultBackground()
+        tabBar.standardAppearance = tabBarAppearance
+                
+        #if DEBUG
+        // selectedIndex = 1
+        #endif
+    }
+        
+}

Mastodon/State/AppContext.swift

@@ -0,0 +1,56 @@
+//
+//  AppContext.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import os.log
+import UIKit
+import Combine
+import CoreData
+import CoreDataStack
+
+class AppContext: ObservableObject {
+    
+    var disposeBag = Set<AnyCancellable>()
+    
+    @Published var viewStateStore = ViewStateStore()
+        
+    let coreDataStack: CoreDataStack
+    let managedObjectContext: NSManagedObjectContext
+    let backgroundManagedObjectContext: NSManagedObjectContext
+    
+    
+    let documentStore: DocumentStore
+    private var documentStoreSubscription: AnyCancellable!
+    
+    let overrideTraitCollection = CurrentValueSubject<UITraitCollection?, Never>(nil)
+
+    init() {
+        let _coreDataStack = CoreDataStack()
+        let _managedObjectContext = _coreDataStack.persistentContainer.viewContext
+        let _backgroundManagedObjectContext = _coreDataStack.persistentContainer.newBackgroundContext()
+        coreDataStack = _coreDataStack
+        managedObjectContext = _managedObjectContext
+        backgroundManagedObjectContext = _backgroundManagedObjectContext
+        
+        documentStore = DocumentStore()
+        documentStoreSubscription = documentStore.objectWillChange
+            .receive(on: DispatchQueue.main)
+            .sink { [unowned self] in
+                self.objectWillChange.send()
+            }
+        
+        backgroundManagedObjectContext.mergePolicy = NSMergePolicy.mergeByPropertyObjectTrump
+        NotificationCenter.default.publisher(for: .NSManagedObjectContextDidSave, object: backgroundManagedObjectContext)
+            .sink { [weak self] notification in
+                guard let self = self else { return }
+                self.managedObjectContext.perform {
+                    self.managedObjectContext.mergeChanges(fromContextDidSave: notification)
+                }
+            }
+            .store(in: &disposeBag)
+    }
+    
+}

Mastodon/State/DocumentStore.swift

@@ -0,0 +1,11 @@
+//
+//  DocumentStore.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import UIKit
+import Combine
+
+class DocumentStore: ObservableObject { }

Mastodon/State/ViewStateStore.swift

@@ -0,0 +1,14 @@
+//
+//  ViewStateStore.swift
+//  Mastodon
+//
+//  Created by Cirno MainasuK on 2021-1-27.
+//
+
+import Combine
+
+struct ViewStateStore {
+
+}
+
+enum ViewState { }

Mastodon/Supporting Files/AppDelegate.swift

@@ -10,7 +10,7 @@ import UIKit
 @main
 class AppDelegate: UIResponder, UIApplicationDelegate {
 
-
+    let appContext = AppContext()
 
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
@@ -34,3 +34,21 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
 }
 
+
+extension AppDelegate {
+    func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
+        #if DEBUG
+        return .all
+        #else
+        return UIDevice.current.userInterfaceIdiom == .pad ? .all : .portrait
+        #endif
+    }
+}
+
+
+extension AppContext {
+    static var shared: AppContext {
+        let appDelegate = UIApplication.shared.delegate as! AppDelegate
+        return appDelegate.appContext
+    }
+}

Mastodon/Supporting Files/Base.lproj/Main.storyboard

@@ -1,24 +1,33 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="System colors in document resources" minToolsVersion="11.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
+                <viewController id="BYZ-38-t0r" sceneMemberID="viewController">
                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
-                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor"/>
                     </view>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
             </objects>
+            <point key="canvasLocation" x="226" y="166"/>
         </scene>
     </scenes>
+    <resources>
+        <systemColor name="systemBackgroundColor">
+            <color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+        </systemColor>
+    </resources>
 </document>

Mastodon/Supporting Files/SceneDelegate.swift

@@ -10,13 +10,22 @@ import UIKit
 class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
     var window: UIWindow?
-
+    var coordinator: SceneCoordinator?
 
     func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
-        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
+        guard let windowScene = scene as? UIWindowScene else { return }
-        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
+        
-        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
+        let window = UIWindow(windowScene: windowScene)
-        guard let _ = (scene as? UIWindowScene) else { return }
+        self.window = window
+
+        
+        let appContext = AppContext.shared
+        let sceneCoordinator = SceneCoordinator(scene: scene, sceneDelegate: self, appContext: appContext)
+        self.coordinator = sceneCoordinator
+        
+        sceneCoordinator.setup()
+        
+        window.makeKeyAndVisible()
     }
 
     func sceneDidDisconnect(_ scene: UIScene) {

Mastodon/ViewController.swift

@@ -1,21 +0,0 @@
-//
-//  ViewController.swift
-//  Mastodon
-//
-//  Created by MainasuK Cirno on 2021/1/22.
-//
-
-import UIKit
-import MastodonSDK
-
-class ViewController: UIViewController {
-             
-    override func viewDidLoad() {
-        super.viewDidLoad()
-
-        // Do any additional setup after loading the view.
-    }
-
-
-}
-

MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+App.swift

@@ -9,10 +9,14 @@ import Combine
 import Foundation
 
 public extension Mastodon.API.App {
-    
+
     static func appEndpointURL(domain: String) -> URL {
         return Mastodon.API.endpointURL(domain: domain).appendingPathComponent("apps")
     }
+
+}
+
+extension Mastodon.API.App {
     
     struct Application: Codable {
 

Podfile

@@ -1,4 +1,4 @@
-platform :ios, '13.0'
+platform :ios, '14.0'
 
 target 'Mastodon' do
   # Comment the next line if you don't want to use dynamic frameworks
@@ -7,7 +7,7 @@ target 'Mastodon' do
   # Pods for Mastodon
 
    # misc
-  pod 'SwiftGen', '~> 6.3.0'
+  pod 'SwiftGen', '~> 6.4.0'
   pod 'DateToolsSwift', '~> 5.0.0'
 
   target 'MastodonTests' do

Podfile.lock

@@ -1,10 +1,10 @@
 PODS:
   - DateToolsSwift (5.0.0)
-  - SwiftGen (6.3.0)
+  - SwiftGen (6.4.0)
 
 DEPENDENCIES:
   - DateToolsSwift (~> 5.0.0)
-  - SwiftGen (~> 6.3.0)
+  - SwiftGen (~> 6.4.0)
 
 SPEC REPOS:
   trunk:
@@ -13,8 +13,8 @@ SPEC REPOS:
 
 SPEC CHECKSUMS:
   DateToolsSwift: 4207ada6ad615d8dc076323d27037c94916dbfa6
-  SwiftGen: 3d5024a47ea79e408cded20763d7a17d18a4548c
+  SwiftGen: 67860cc7c3cfc2ed25b9b74cfd55495fc89f9108
 
-PODFILE CHECKSUM: ed665713fa5980e9fe017a69012b7ec2b15a684f
+PODFILE CHECKSUM: 5a58ccfd113912468e008313e1c91ed51b7cba20
 
 COCOAPODS: 1.10.1