src/Tizen.Network.Nfc/Tizen.Network.Nfc/NfcTag.cs

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 using System;
  18 using System.Runtime.InteropServices;
  19 using System.Collections.Generic;
  20 using System.Threading.Tasks;
  21
  22 namespace Tizen.Network.Nfc
  23 {
  24     /// <summary>
  25     /// A class for managing the Tag information.
  26     /// </summary>
  27     /// <since_tizen> 3 </since_tizen>
  28     public class NfcTag : IDisposable
  29     {
  30         private bool disposed = false;
  31         private IntPtr _tagHandle = IntPtr.Zero;
  32
  33         /// <summary>
  34         /// The type of NFC tag.
  35         /// </summary>
  36         /// <since_tizen> 3 </since_tizen>
  37         public NfcTagType Type
  38         {
  39             get
  40             {
  41                 int type;
  42                 int ret = Interop.Nfc.Tag.GetType(_tagHandle, out type);
  43                 if (ret != (int)NfcError.None)
  44                 {
  45                     Log.Error(Globals.LogTag, "Failed to get tag type, Error - " + (NfcError)ret);
  46                 }
  47                 return (NfcTagType)type;
  48             }
  49         }
  50
  51         /// <summary>
  52         /// Whether the given NFC tag supports NDEF messages.
  53         /// </summary>
  54         /// <since_tizen> 3 </since_tizen>
  55         public bool IsSupportNdef
  56         {
  57             get
  58             {
  59                 bool isSupport;
  60                 int ret = Interop.Nfc.Tag.IsSupportNdef(_tagHandle, out isSupport);
  61                 if (ret != (int)NfcError.None)
  62                 {
  63                     Log.Error(Globals.LogTag, "Failed to get support state, Error - " + (NfcError)ret);
  64                 }
  65                 return isSupport;
  66
  67             }
  68         }
  69
  70         /// <summary>
  71         /// The maximum NDEF message size that can be stored in NFC tag.
  72         /// </summary>
  73         /// <since_tizen> 3 </since_tizen>
  74         public uint MaximumNdefSize
  75         {
  76             get
  77             {
  78                 uint maxSize;
  79                 int ret = Interop.Nfc.Tag.GetMaximumNdefSize(_tagHandle, out maxSize);
  80                 if (ret != (int)NfcError.None)
  81                 {
  82                     Log.Error(Globals.LogTag, "Failed to get max ndef size, Error - " + (NfcError)ret);
  83                 }
  84                 return maxSize;
  85             }
  86         }
  87
  88         /// <summary>
  89         /// The size of NDEF message that stored in the tag.
  90         /// </summary>
  91         /// <since_tizen> 3 </since_tizen>
  92         public uint NdefSize
  93         {
  94             get
  95             {
  96                 uint ndefSize;
  97                 int ret = Interop.Nfc.Tag.GetNdefSize(_tagHandle, out ndefSize);
  98                 if (ret != (int)NfcError.None)
  99                 {
 100                     Log.Error(Globals.LogTag, "Failed to get ndef size, Error - " + (NfcError)ret);
 101                 }
 102                 return ndefSize;
 103             }
 104         }
 105
 106         internal NfcTag(IntPtr handle)
 107         {
 108             _tagHandle = handle;
 109         }
 110
 111         ~NfcTag()
 112         {
 113             Dispose(false);
 114         }
 115
 116         public void Dispose()
 117         {
 118             Dispose(true);
 119             GC.SuppressFinalize(this);
 120         }
 121
 122         private void Dispose(bool disposing)
 123         {
 124             if (disposed)
 125                 return;
 126
 127             if (disposing)
 128             {
 129                 // Free managed objects.
 130             }
 131             //Free unmanaged objects
 132             disposed = true;
 133         }
 134
 135         /// <summary>
 136         /// Retrieves all tag information.
 137         /// </summary>
 138         /// <since_tizen> 3 </since_tizen>
 139         /// <returns>List of NfcTagInformation objects.</returns>
 140         public IEnumerable<NfcTagInformation> ForeachInformation()
 141         {
 142             List<NfcTagInformation> infoList = new List<NfcTagInformation>();
 143             Interop.Nfc.TagInformationCallback callback = (IntPtr key, IntPtr infoValue, int valueSize, IntPtr userData) =>
 144             {
 145                 if (key != IntPtr.Zero && infoValue != IntPtr.Zero)
 146                 {
 147                     NfcTagInformation tagInfo = new NfcTagInformation(Marshal.PtrToStringAnsi(key), new byte[valueSize]);
 148
 149                     Marshal.Copy(infoValue, tagInfo.InformationValue, 0, valueSize);
 150
 151                     infoList.Add(tagInfo);
 152
 153                     return true;
 154                 }
 155                 return false;
 156             };
 157
 158             int ret = Interop.Nfc.Tag.ForeachInformation(_tagHandle, callback, IntPtr.Zero);
 159             if (ret != (int)NfcError.None)
 160             {
 161                 Log.Error(Globals.LogTag, "Failed to get all Tag information, Error - " + (NfcError)ret);
 162                 NfcErrorFactory.ThrowNfcException(ret);
 163             }
 164
 165             return infoList;
 166         }
 167
 168         /// <summary>
 169         /// Transceives the data of the raw format card.
 170         /// </summary>
 171         /// <since_tizen> 3 </since_tizen>
 172         /// <param name="buffer">The binary data for parameter or additional commands.</param>
 173         public Task<byte[]> TransceiveAsync(byte[] buffer)
 174         {
 175             var task = new TaskCompletionSource<byte[]>();
 176
 177             byte[] resultBuffer = null;
 178             Interop.Nfc.TagTransceiveCompletedCallback callback = (int result, IntPtr resultData, int dataSize, IntPtr userData) =>
 179             {
 180                 if (result == (int)NfcError.None)
 181                 {
 182                     resultBuffer = new byte[dataSize];
 183                     Marshal.Copy(resultData, resultBuffer, 0, dataSize);
 184                     task.SetResult(resultBuffer);
 185                 }
 186                 return;
 187             };
 188
 189             int ret = Interop.Nfc.Tag.Transceive(_tagHandle, buffer, buffer.Length, callback, IntPtr.Zero);
 190             if (ret != (int)NfcError.None)
 191             {
 192                 Log.Error(Globals.LogTag, "Failed to transceive data, Error - " + (NfcError)ret);
 193                 NfcErrorFactory.ThrowNfcException(ret);
 194             }
 195
 196             return task.Task;
 197         }
 198
 199         /// <summary>
 200         /// Reads NDEF formatted data from NFC tag.
 201         /// </summary>
 202         /// <since_tizen> 3 </since_tizen>
 203         public Task<NfcNdefMessage> ReadNdefMessageAsync()
 204         {
 205             var task = new TaskCompletionSource<NfcNdefMessage>();
 206
 207             NfcNdefMessage ndefMsg = null;
 208             Interop.Nfc.TagReadCompletedCallback callback = (int result, IntPtr ndefMessage, IntPtr userData) =>
 209             {
 210                 if (result == (int)NfcError.None)
 211                 {
 212                     ndefMsg = new NfcNdefMessage(ndefMessage);
 213                     task.SetResult(ndefMsg);
 214
 215                     return true;
 216                 }
 217                 return false;
 218             };
 219
 220             int ret = Interop.Nfc.Tag.ReadNdef(_tagHandle, callback, IntPtr.Zero);
 221             if (ret != (int)NfcError.None)
 222             {
 223                 Log.Error(Globals.LogTag, "Failed to read ndef message, Error - " + (NfcError)ret);
 224                 NfcErrorFactory.ThrowNfcException(ret);
 225             }
 226
 227             return task.Task;
 228         }
 229
 230         /// <summary>
 231         /// Writes NDEF formatted data.
 232         /// </summary>
 233         /// <since_tizen> 3 </since_tizen>
 234         /// <param name="ndefMessage">The NfcNdefMessage object.</param>
 235         public Task<NfcError> WriteNdefMessageAsync(NfcNdefMessage ndefMessage)
 236         {
 237             var task = new TaskCompletionSource<NfcError>();
 238
 239             Interop.Nfc.VoidCallback callback = (int result, IntPtr userData) =>
 240             {
 241                 task.SetResult((NfcError)result);
 242                 return;
 243             };
 244
 245             int ret = Interop.Nfc.Tag.WriteNdef(_tagHandle, ndefMessage.GetHandle(), callback, IntPtr.Zero);
 246             if (ret != (int)NfcError.None)
 247             {
 248                 Log.Error(Globals.LogTag, "Failed to write ndef message, Error - " + (NfcError)ret);
 249                 NfcErrorFactory.ThrowNfcException(ret);
 250             }
 251
 252             return task.Task;
 253         }
 254
 255         /// <summary>
 256         /// Formats the detected tag that can store NDEF message.
 257         /// </summary>
 258         /// <since_tizen> 3 </since_tizen>
 259         /// <param name="keyValue">The key value that may need to format the tag.</param>
 260         public Task<NfcError> FormatNdefMessageAsync(byte[] keyValue)
 261         {
 262             var task = new TaskCompletionSource<NfcError>();
 263
 264             Interop.Nfc.VoidCallback callback = (int result, IntPtr userData) =>
 265             {
 266                 task.SetResult((NfcError)result);
 267                 return;
 268             };
 269
 270             int ret = Interop.Nfc.Tag.FormatNdef(_tagHandle, keyValue, keyValue.Length, callback, IntPtr.Zero);
 271             if (ret != (int)NfcError.None)
 272             {
 273                 Log.Error(Globals.LogTag, "Failed to format ndef message, Error - " + (NfcError)ret);
 274                 NfcErrorFactory.ThrowNfcException(ret);
 275             }
 276
 277             return task.Task;
 278         }
 279     }
 280 }