Reorganize AltStore project into UIKit and SwiftUI folders

AltStore/SwiftUI/Helper/DateFormatterHelper.swift

@@ -0,0 +1,72 @@
+//
+//  DateFormatterHelper.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 20.11.22.
+//  Copyright © 2022 Fabian Thies. All rights reserved.
+//
+
+import Foundation
+
+struct DateFormatterHelper {
+    
+    private static let appExpirationDateFormatter: DateComponentsFormatter = {
+        let dateComponentsFormatter = DateComponentsFormatter()
+        dateComponentsFormatter.zeroFormattingBehavior = [.pad]
+        dateComponentsFormatter.collapsesLargestUnit = false
+        return dateComponentsFormatter
+    }()
+
+    private static let relativeDateFormatter: RelativeDateTimeFormatter = {
+        let formatter = RelativeDateTimeFormatter()
+        formatter.unitsStyle = .abbreviated
+        return formatter
+    }()
+
+    private static let mediumDateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateStyle = .medium
+        dateFormatter.timeStyle = .none
+        dateFormatter.doesRelativeDateFormatting = true
+        return dateFormatter
+    }()
+
+    private static let timeFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateStyle = .none
+        dateFormatter.timeStyle = .short
+        return dateFormatter
+    }()
+
+    
+    
+    static func string(forExpirationDate date: Date) -> String {
+        let startDate = Date()
+        let interval = date.timeIntervalSince(startDate)
+        guard interval > 0 else {
+            return "EXPIRED"
+        }
+        
+        if interval < (24 * 60 * 60) {
+            self.appExpirationDateFormatter.unitsStyle = .positional
+            self.appExpirationDateFormatter.allowedUnits = [.minute, .second]
+        } else {
+            self.appExpirationDateFormatter.unitsStyle = .full
+            self.appExpirationDateFormatter.allowedUnits = [.day]
+        }
+        
+        return self.appExpirationDateFormatter.string(from: startDate, to: date) ?? ""
+    }
+
+    static func string(forRelativeDate date: Date, to referenceDate: Date = Date()) -> String {
+        self.relativeDateFormatter.localizedString(for: date, relativeTo: referenceDate)
+    }
+
+    static func string(for date: Date) -> String {
+        self.mediumDateFormatter.string(from: date)
+    }
+
+    static func timeString(for date: Date) -> String {
+        self.timeFormatter.string(from: date)
+    }
+}