Context analysis: +/-5min raw logs

main/Requests/Analytics/TVCOccurrenceContext.swift

@@ -0,0 +1,100 @@
+import UIKit
+
+class TVCOccurrenceContext: UITableViewController {
+	
+	var ts: Timestamp!
+	var domain: String!
+	
+	private let dT: Timestamp = 300 // +/- 5 minutes
+	private lazy var dataSource: [DomainTsPair] = {
+		var list: [DomainTsPair] = []
+		list.append(("[…]", ts + dT))
+		list.append(contentsOf: AppDB?.dnsLogs(between: ts - dT, and: ts + dT) ?? [])
+		list.append(("[…]", ts - dT))
+		return list
+	}()
+	
+	override func viewDidLoad() {
+		navigationItem.title = "± 5 Min Context"
+		super.viewDidLoad()
+	}
+	
+	override func viewDidAppear(_ animated: Bool) {
+		jumpToTsZero()
+	}
+	
+	@IBAction private func jumpToTsZero() {
+		if let i = dataSource.firstIndex(where: { isChoosenOne($0) }) {
+			tableView.scrollToRow(at: IndexPath(row: i), at: .middle, animated: true)
+		}
+	}
+	
+	private func isChoosenOne(_ obj: DomainTsPair) -> Bool {
+		obj.domain == domain && obj.ts == ts
+	}
+	
+	private func firstOrLast(_ row: Int) -> Bool {
+		row == 0 || row == dataSource.count - 1
+	}
+	
+	
+	// MARK: - Table View Data Source
+	
+	override func tableView(_: UITableView, numberOfRowsInSection _: Int) -> Int { dataSource.count }
+	
+	override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+		let cell = tableView.dequeueReusableCell(withIdentifier: "OccurrenceContextCell")!
+		let src = dataSource[indexPath.row]
+		cell.detailTextLabel?.text = src.domain
+		
+		if firstOrLast(indexPath.row) {
+			cell.detailTextLabel?.textColor = .sysLabel2 // same as textLabel
+		} else if isChoosenOne(src) {
+			cell.detailTextLabel?.textColor = .sysLink
+		} else {
+			cell.detailTextLabel?.textColor = .sysLabel
+		}
+		
+		if src.ts > ts {
+			cell.textLabel?.text = "+ " + TimeFormat.from(src.ts - ts)
+		} else if src.ts < ts {
+			cell.textLabel?.text = "− " + TimeFormat.from(ts - src.ts)
+		} else {
+			cell.textLabel?.text = "0"
+		}
+		//cell.textLabel?.text = String(format: "%+d s", src.ts - ts)
+		return cell
+	}
+	
+	
+	// MARK: - Tap to Copy
+	
+	private var rowToCopy: Int = Int.max
+	
+	override func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
+		if firstOrLast(indexPath.row) { return nil }
+		if rowToCopy == indexPath.row {
+			UIMenuController.shared.setMenuVisible(false, animated: true)
+			rowToCopy = Int.max
+			return nil
+		}
+		rowToCopy = indexPath.row
+		self.becomeFirstResponder()
+		let cell = tableView.cellForRow(at: indexPath)!
+		UIMenuController.shared.setTargetRect(cell.bounds, in: cell)
+		UIMenuController.shared.setMenuVisible(true, animated: true)
+		return nil
+	}
+	
+	override var canBecomeFirstResponder: Bool { true }
+	
+	override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
+		action == #selector(UIResponderStandardEditActions.copy)
+	}
+	
+	override func copy(_ sender: Any?) {
+		guard rowToCopy < dataSource.count else { return }
+		UIPasteboard.general.string = dataSource[rowToCopy].domain
+		rowToCopy = Int.max
+	}
+}