DatePickerAlert + DateFormat

main/Extensions/AutoLayout.swift

@@ -59,6 +59,7 @@ extension UIView {
 	private static let inverseItem: [NSLayoutConstraint.Attribute] = [.right, .bottom, .trailing, .lastBaseline, .rightMargin, .bottomMargin, .trailingMargin]
 	
 	/// Create and active constraints for provided edges. Constraints will anchor the same edge on both `self` and `other`.
+	/// - Note: Will set `translatesAutoresizingMaskIntoConstraints = false`
 	/// - Parameters:
 	///   - edges: List of constraint attributes, e.g. `[.top, .bottom, .left, .right]`
 	///   - other: Instance to bind to, e.g. `UIView` or `UILayoutGuide`
@@ -66,7 +67,8 @@ extension UIView {
 	///   - rel: Constraint relation. (Default: `.equal`)
 	/// - Returns: List of created and active constraints
 	@discardableResult func anchor(_ edges: [NSLayoutConstraint.Attribute], to other: Any, margin: CGFloat = 0, if rel: NSLayoutConstraint.Relation = .equal) -> [NSLayoutConstraint] {
-		edges.map {
+		translatesAutoresizingMaskIntoConstraints = false
+		return edges.map {
 			let (A, B) = UIView.inverseItem.contains($0) ? (other, self) : (self, other)
 			return NSLayoutConstraint(item: A, attribute: $0, relatedBy: rel, toItem: B, attribute: $0, multiplier: 1, constant: margin).on()
 		}

main/Extensions/Font.swift

@@ -0,0 +1,34 @@
+import UIKit
+
+extension UIFont {
+	func withTraits(traits: UIFontDescriptor.SymbolicTraits) -> UIFont {
+		UIFont(descriptor: fontDescriptor.withSymbolicTraits(traits)!, size: 0) // keep size as is
+    }
+    func bold() -> UIFont { withTraits(traits: .traitBold) }
+    func italic() -> UIFont { withTraits(traits: .traitItalic) }
+	func monoSpace() -> UIFont {
+		let traits = fontDescriptor.object(forKey: .traits) as? [UIFontDescriptor.TraitKey: Any] ?? [:]
+		let weight = (traits[.weight] as? CGFloat) ?? UIFont.Weight.regular.rawValue
+		return .monospacedDigitSystemFont(ofSize: pointSize, weight: .init(rawValue: weight))
+	}
+}
+
+extension NSMutableAttributedString {
+	static private var def: UIFont = .preferredFont(forTextStyle: .body)
+	
+	func normal(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: .preferredFont(forTextStyle: style)) }
+	func bold(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).bold()) }
+	func italic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).italic()) }
+	
+	func h1(_ str: String) -> Self { normal(str, .title1) }
+	func h2(_ str: String) -> Self { normal(str, .title2) }
+	func h3(_ str: String) -> Self { normal(str, .title3) }
+	
+	private func append(_ str: String, withFont: UIFont) -> Self {
+		append(NSAttributedString(string: str, attributes: [
+			.font : withFont,
+			.foregroundColor : UIColor.sysFg
+		]))
+		return self
+	}
+}

main/Extensions/Time.swift

@@ -1,7 +1,5 @@
 import Foundation
 
-private let dateTimeFormat = DateFormatter(withFormat: "yyyy-MM-dd  HH:mm:ss")
-
 extension DateFormatter {
 	convenience init(withFormat: String) {
 		self.init()
@@ -9,26 +7,18 @@ extension DateFormatter {
 	}
 }
 
-extension Timestamp {
-	/// Time string with format `yyyy-MM-dd  HH:mm:ss`
-	func asDateTime() -> String {
-		dateTimeFormat.string(from: Date.init(timeIntervalSince1970: Double(self)))
-	}
-	
+extension Date {
 	/// Convert `Timestamp` to `Date`
-	func toDate() -> Date {
-		Date(timeIntervalSince1970: Double(self))
-	}
-	
+	init(_ ts: Timestamp) { self.init(timeIntervalSince1970: Double(ts)) }
+	/// Convert  `Date` to `Timestamp`
+	var timestamp: Timestamp { get { Timestamp(self.timeIntervalSince1970) } }
+}
+
+extension Timestamp {
 	/// Current time as `Timestamp` (second accuracy)
-	static func now() -> Timestamp {
-		Timestamp(Date().timeIntervalSince1970)
-	}
-	
+	static func now() -> Timestamp { Date().timestamp }
 	/// Create `Timestamp` with `now() - minutes * 60`
-	static func past(minutes: Int) -> Timestamp {
-		now() - Timestamp(minutes * 60)
-	}
+	static func past(minutes: Int) -> Timestamp { now() - Timestamp(minutes * 60) }
 }
 
 extension Timer {
@@ -39,6 +29,24 @@ extension Timer {
 	}
 }
 
+
+// MARK: - DateFormat
+
+enum DateFormat {
+	private static let _hms = DateFormatter(withFormat: "yyyy-MM-dd  HH:mm:ss")
+	private static let _hm = DateFormatter(withFormat: "yyyy-MM-dd HH:mm")
+	
+	/// Format: `yyyy-MM-dd  HH:mm:ss`
+	static func seconds(_ date: Date) -> String { _hms.string(from: date) }
+	/// Format: `yyyy-MM-dd  HH:mm:ss`
+	static func seconds(_ ts: Timestamp) -> String { _hms.string(from: Date(ts)) }
+	/// Format: `yyyy-MM-dd HH:mm`
+	static func minutes(_ date: Date) -> String { _hm.string(from: date) }
+	/// Format: `yyyy-MM-dd HH:mm`
+	static func minutes(_ ts: Timestamp) -> String { _hm.string(from: Date(ts)) }
+}
+
+
 // MARK: - TimeFormat
 
 struct TimeFormat {