Plugin.NFC added to rpoject

2024-12-17 17:01:50 +01:00
parent 40e651e30a
commit a605bb9947
12 changed files with 3270 additions and 0 deletions
@@ -0,0 +1,113 @@
+using System.Linq;
+using System.Text;
+#if __IOS__
+using UIKit;
+#endif
+
+namespace Plugin.NFC
+{
+	/// <summary>
+	/// NFC tools
+	/// </summary>
+	public static class NFCUtils
+	{
+		/// <summary>
+		/// Returns the content size of an array of <see cref="NFCNdefRecord"/>
+		/// </summary>
+		/// <param name="records">array of <see cref="NFCNdefRecord"/></param>
+		/// <returns>Content size</returns>
+		internal static int GetSize(NFCNdefRecord[] records)
+		{
+			var size = 0;
+			if (records != null && records.Length > 0)
+			{
+				for (var i = 0; i < records.Length; i++)
+				{
+					if (records[i] != null)
+						size += records[i].Payload.Length;
+				}
+			}
+			return size;
+		}
+
+		/// <summary>
+		/// Returns the string formatted payload
+		/// </summary>
+		/// <param name="type">type of <see cref="NFCNdefTypeFormat"/></param>
+		/// <param name="payload">record payload</param>
+		/// <param name="uri">record uri</param>
+		/// <returns>String formatted payload</returns>
+		internal static string GetMessage(NFCNdefTypeFormat type, byte[] payload, string uri)
+		{
+			string message;
+			if (!string.IsNullOrWhiteSpace(uri))
+				message = uri;
+			else
+			{
+				if (type == NFCNdefTypeFormat.WellKnown)
+				{
+					// NDEF_WELLKNOWN Text record
+					var status = payload[0];
+					var enc = status & 0x80;
+					var languageCodeLength = status & 0x3F;
+					if (enc == 0)
+						message = Encoding.UTF8.GetString(payload, languageCodeLength + 1, payload.Length - languageCodeLength - 1);
+					else
+						message = Encoding.Unicode.GetString(payload, languageCodeLength + 1, payload.Length - languageCodeLength - 1);
+				}
+				else
+				{
+					// Other NDEF types
+					message = Encoding.UTF8.GetString(payload, 0, payload.Length);
+				}
+			}
+			return message;
+		}
+
+		/// <summary>
+		/// Transforms a string message into an array of bytes
+		/// </summary>
+		/// <param name="text">text message</param>
+		/// <returns>Array of bytes</returns>
+		public static byte[] EncodeToByteArray(string text) => Encoding.UTF8.GetBytes(text);
+
+		/// <summary>
+		/// Returns the string formatted payload
+		/// </summary>
+		/// <param name="record">Object <see cref="NFCNdefRecord"/></param>
+		/// <returns>String formatted payload</returns>
+		public static string GetMessage(NFCNdefRecord record)
+		{
+			if (record == null)
+				return string.Empty;
+			return GetMessage(record.TypeFormat, record.Payload, record.Uri);
+		}
+
+        /// <summary>
+        /// Convert bytes array into hexadecimal string
+        /// </summary>
+        /// <param name="bytes">Bytes Array</param>
+        /// <param name="separator">Separator</param>
+        /// <returns>Hexadecimal string</returns>
+        public static string ByteArrayToHexString(byte[] bytes, string separator = null)
+        {
+            return bytes == null ? string.Empty : string.Join(separator ?? string.Empty, bytes.Select(b => b.ToString("X2")));
+        }
+
+		/// <summary>
+		/// Checks if writing tags is supported
+		/// </summary>
+		/// <returns>boolean</returns>
+		public static bool IsWritingSupported()
+		{
+#if __IOS__
+			var splitted = UIDevice.CurrentDevice.SystemVersion?.Split('.');
+			if (splitted != null && splitted.Length > 0 && int.TryParse(splitted[0], out var majorVersion))
+				return majorVersion >= 13;
+			return false;
+#else
+			return true;
+#endif
+		}
+	}
+}