Nextcloud login flow v2, Network code rewrite

Nextcloud Cookbook iOS Client/Extensions/DateFormatterExtension.swift

@@ -0,0 +1,34 @@
+//
+//  DateFormatterExtension.swift
+//  Nextcloud Cookbook iOS Client
+//
+//  Created by Vincent Meilinger on 14.09.23.
+//
+
+import Foundation
+
+extension Formatter {
+    static let positional: DateComponentsFormatter = {
+        let formatter = DateComponentsFormatter()
+        formatter.unitsStyle = .positional
+        return formatter
+    }()
+}
+
+func formatDate(duration: String) -> String {
+    var duration = duration
+    if duration.hasPrefix("PT") { duration.removeFirst(2) }
+    let hour, minute, second: Double
+    if let index = duration.firstIndex(of: "H") {
+        hour = Double(duration[..<index]) ?? 0
+        duration.removeSubrange(...index)
+    } else { hour = 0 }
+    if let index = duration.firstIndex(of: "M") {
+        minute = Double(duration[..<index]) ?? 0
+        duration.removeSubrange(...index)
+    } else { minute = 0 }
+    if let index = duration.firstIndex(of: "S") {
+        second = Double(duration[..<index]) ?? 0
+    } else { second = 0 }
+    return Formatter.positional.string(from: hour * 3600 + minute * 60 + second) ?? "0:00"
+}