Refactoring I.

- Revamp whole DB to Display flow
- Filter Pipeline, arbitrary filtering and sorting
- Binary tree arrays for faster lookup & manipulation
- DB: introducing custom functions
- DB scheme: split req into heap & cache
- cache written by GlassVPN only
- heap written by Main App only
- Introducing DB separation: DBCore, DBCommon, DBAppOnly
- Introducing DB data sources: TestDataSource, GroupedDomainDataSource, RecordingsDB, DomainFilter
- Background sync: Move entries from cache to heap and notify all observers
- GlassVPN: Binary tree filter lookup
- GlassVPN: Reusing prepared statement

main/Recordings/TVCPreviousRecords.swift

@@ -4,7 +4,7 @@ class TVCPreviousRecords: UITableViewController, EditActionsRemove {
 	private var dataSource: [Recording] = []
 	
 	override func viewDidLoad() {
-		dataSource = DBWrp.listOfRecordings().reversed() // newest on top
+		dataSource = RecordingsDB.list().reversed() // newest on top
 		NotifyRecordingChanged.observe(call: #selector(recordingDidChange(_:)), on: self)
 	}
 	
@@ -76,8 +76,16 @@ class TVCPreviousRecords: UITableViewController, EditActionsRemove {
 	
 	// MARK: - Editing
 	
+	override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
+		getRowActionsIOS9(indexPath)
+	}
+	@available(iOS 11.0, *)
+	override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
+		getRowActionsIOS11(indexPath)
+	}
+	
 	func editableRowCallback(_ index: IndexPath, _ action: RowAction, _ userInfo: Any?) -> Bool {
-		DBWrp.recordingDelete(self.dataSource[index.row])
+		RecordingsDB.delete(self.dataSource[index.row])
 		return true
 	}
 }

main/Recordings/TVCRecordingDetails.swift

@@ -6,15 +6,13 @@ class TVCRecordingDetails: UITableViewController, EditActionsRemove {
 	
 	override func viewDidLoad() {
 		title = record.title ?? record.fallbackTitle
-		dataSource = DBWrp.recordingDetails(record)
+		dataSource = RecordingsDB.details(record)
 	}
 	
 	
 	// MARK: - Table View Data Source
 	
-	override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
-		dataSource.count
-	}
+	override func tableView(_ _: UITableView, numberOfRowsInSection _: Int) -> Int { dataSource.count }
 	
 	override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
 		let cell = tableView.dequeueReusableCell(withIdentifier: "PreviousRecordDetailCell")!
@@ -27,10 +25,18 @@ class TVCRecordingDetails: UITableViewController, EditActionsRemove {
 	
 	// MARK: - Editing
 	
+	override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
+		getRowActionsIOS9(indexPath)
+	}
+	@available(iOS 11.0, *)
+	override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
+		getRowActionsIOS11(indexPath)
+	}
+	
 	func editableRowCallback(_ index: IndexPath, _ action: RowAction, _ userInfo: Any?) -> Bool {
-		if DBWrp.recordingDeleteDetails(record, domain: self.dataSource[index.row].domain) {
-			self.dataSource.remove(at: index.row)
-			self.tableView.deleteRows(at: [index], with: .automatic)
+		if RecordingsDB.deleteDetails(record, domain: dataSource[index.row].domain) {
+			dataSource.remove(at: index.row)
+			tableView.deleteRows(at: [index], with: .automatic)
 		}
 		return true
 	}

main/Recordings/VCEditRecording.swift

@@ -43,8 +43,8 @@ class VCEditRecording: UIViewController, UITextFieldDelegate, UITextViewDelegate
 		record.title = (inputTitle.text == "") ? nil : inputTitle.text
 		record.notes = (inputNotes.text == "") ? nil : inputNotes.text
 		dismiss(animated: true) {
-			DBWrp.recordingUpdate(self.record)
-			DBWrp.recordingPersist(self.record)
+			RecordingsDB.update(self.record)
+			RecordingsDB.persist(self.record)
 		}
 	}
 	
@@ -56,7 +56,7 @@ class VCEditRecording: UIViewController, UITextFieldDelegate, UITextViewDelegate
 	override func viewDidDisappear(_ animated: Bool) {
 		if deleteOnCancel {
 			QLog.Debug("deleting record #\(record.id)")
-			DBWrp.recordingDelete(record)
+			RecordingsDB.delete(record)
 			deleteOnCancel = false
 		}
 	}

main/Recordings/VCRecordings.swift

@@ -18,7 +18,7 @@ class VCRecordings: UIViewController, UINavigationControllerDelegate {
 		timeLabel.font = UIFont.monospacedDigitSystemFont(ofSize: timeLabel.font.pointSize, weight: UIFont.Weight(rawValue: weight))
 		// hide timer if not running
 		updateUI(setRecording: false, animated: false)
-		currentRecording = DBWrp.recordingGetCurrent()
+		currentRecording = RecordingsDB.getCurrent()
 		
 		if !Pref.DidShowTutorial.Recordings {
 			self.perform(#selector(showTutorial), with: nil, afterDelay: 0.5)
@@ -54,11 +54,11 @@ class VCRecordings: UIViewController, UINavigationControllerDelegate {
 	
 	@IBAction private func startRecordingButtonTapped(_ sender: UIButton) {
 		if recordingTimer == nil {
-			currentRecording = DBWrp.recordingStartNew()
+			currentRecording = RecordingsDB.startNew()
 			startTimer(animate: true)
 		} else {
 			stopTimer(animate: true)
-			DBWrp.recordingStop(&currentRecording!)
+			RecordingsDB.stop(&currentRecording!)
 			prevRecController.popToRootViewController(animated: true)
 			let editVC = (prevRecController.topViewController as! TVCPreviousRecords)
 			editVC.insertAndEditRecording(currentRecording!)