Apply code style

Author: fanyu

Mixin/AppDelegate.swift

@@ -261,6 +261,7 @@ extension AppDelegate {
     @objc func databaseCorrupted() {
         mainWindow.rootViewController = makeInitialViewController()
     }
+    
 }
 
 extension AppDelegate {

Mixin/Service/Job/DatabaseBackupJob.swift

@@ -11,12 +11,14 @@ class DatabaseBackupJob: AsynchronousJob {
     override func execute() -> Bool {
         do {
             try UserDatabase.current.writeWithoutTransaction { _ in
+                try DatabaseFile.removeIfExists(.temp)
                 try DatabaseFile.copy(at: .original, to: .temp)
             }
             let dbQueue = try DatabaseQueue(path: DatabaseFile.temp.db.path)
             try dbQueue.write { db in
                 try db.execute(sql: "PRAGMA integrity_check")
             }
+            try DatabaseFile.removeIfExists(.backup)
             try DatabaseFile.copy(at: .temp, to: .backup)
             try DatabaseFile.removeIfExists(.temp)
             AppGroupUserDefaults.User.lastDatabaseBackupDate = Date()

Mixin/UserInterface/Controllers/Home/Model/DatabaseBackupManager.swift

@@ -14,8 +14,13 @@ class DatabaseBackupManager: NSObject {
         guard LoginManager.shared.isLoggedIn else {
             return
         }
-        let lastDatabaseBackupDate = AppGroupUserDefaults.User.lastDatabaseBackupDate
-        if lastDatabaseBackupDate == nil || -lastDatabaseBackupDate!.timeIntervalSinceNow > TimeInterval.hour * 2 {
+        let needsBackup: Bool
+        if let date = AppGroupUserDefaults.User.lastDatabaseBackupDate {
+            needsBackup = -date.timeIntervalSinceNow > TimeInterval.hour * 2
+        } else {
+            needsBackup = true
+        }
+        if needsBackup {
             ConcurrentJobQueue.shared.addJob(job: DatabaseBackupJob())
         }
     }

Mixin/UserInterface/Controllers/Home/Model/DatabaseFile.swift

@@ -42,11 +42,10 @@ enum DatabaseFile {
         }
     }
 
-    static func copy(at srcFile: DatabaseFile, to dstFIle: DatabaseFile) throws {
-        try removeIfExists(dstFIle)
-        try FileManager.default.copyItem(at: srcFile.db, to: dstFIle.db)
-        try FileManager.default.copyItem(at: srcFile.wal, to: dstFIle.wal)
-        try FileManager.default.copyItem(at: srcFile.shm, to: dstFIle.shm)
+    static func copy(at srcFile: DatabaseFile, to dstFile: DatabaseFile) throws {
+        try FileManager.default.copyItem(at: srcFile.db, to: dstFile.db)
+        try FileManager.default.copyItem(at: srcFile.wal, to: dstFile.wal)
+        try FileManager.default.copyItem(at: srcFile.shm, to: dstFile.shm)
     }
 
     static func exists(_ file: DatabaseFile) -> Bool {