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Nextcloud Cookbook iOS Client/Extensions/DateExtension.swift

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+//
+//  DateExtension.swift
+//  Nextcloud Cookbook iOS Client
+//
+//  Created by Vincent Meilinger on 14.12.23.
+//
+
+import Foundation
+
+extension Date {
+    static func convertUTCStringToLocalString(utcDateString: String, withFormat format: String = "yyyy-MM-dd HH:mm:ss") -> String? {
+        // DateFormatter for parsing the UTC date string
+        let inputFormatter = DateFormatter()
+        inputFormatter.dateFormat = format
+        inputFormatter.timeZone = TimeZone(secondsFromGMT: 0) // UTC
+
+        // DateFormatter for converting to local time string
+        let outputFormatter = DateFormatter()
+        outputFormatter.dateFormat = format // You can modify this format for different output styles
+        outputFormatter.timeZone = TimeZone.current // Device's local time zone
+
+        // Convert the string to Date and then to local time string
+        if let date = inputFormatter.date(from: utcDateString) {
+            return outputFormatter.string(from: date)
+        } else {
+            return nil // Return nil if the input string is not in the correct format
+        }
+    }
+    
+    static func convertISOStringToLocalString(isoDateString: String, withFormat format: String = "yyyy-MM-dd HH:mm:ss") -> String? {
+        let inputFormatter = ISO8601DateFormatter()
+        // DateFormatter for converting to local time string
+        let outputFormatter = DateFormatter()
+        outputFormatter.dateFormat = format // You can modify this format for different output styles
+        outputFormatter.timeZone = TimeZone.current // Device's local time zone
+
+        // Convert the string to Date and then to local time string
+        if let date = inputFormatter.date(from: isoDateString) {
+            return outputFormatter.string(from: date)
+        } else {
+            return nil // Return nil if the input string is not in the correct format
+        }
+    }
+}