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package org.yuzu.yuzu_emu.utils
import android.app.Activity
import android.app.PendingIntent
import android.content.Intent
import android.content.IntentFilter
import android.nfc.NfcAdapter
import android.nfc.Tag
import android.nfc.tech.NfcA
import android.os.Build
import android.os.Handler
import android.os.Looper
import org.yuzu.yuzu_emu.NativeLibrary
import java.io.IOException
class NfcReader(private val activity: Activity) {
private var nfcAdapter: NfcAdapter? = null
private var pendingIntent: PendingIntent? = null
fun initialize() {
nfcAdapter = NfcAdapter.getDefaultAdapter(activity) ?: return
pendingIntent = PendingIntent.getActivity(
activity,
0, Intent(activity, activity.javaClass),
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_MUTABLE
else PendingIntent.FLAG_UPDATE_CURRENT
)
val tagDetected = IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED)
tagDetected.addCategory(Intent.CATEGORY_DEFAULT)
}
fun startScanning() {
nfcAdapter?.enableForegroundDispatch(activity, pendingIntent, null, null)
}
fun stopScanning() {
nfcAdapter?.disableForegroundDispatch(activity)
}
fun onNewIntent(intent: Intent) {
val action = intent.action
if (NfcAdapter.ACTION_TAG_DISCOVERED != action
&& NfcAdapter.ACTION_TECH_DISCOVERED != action
&& NfcAdapter.ACTION_NDEF_DISCOVERED != action
) {
return
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
val tag =
intent.getParcelableExtra(NfcAdapter.EXTRA_TAG, Tag::class.java) ?: return
readTagData(tag)
return
}
val tag =
intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG) ?: return
readTagData(tag)
}
private fun readTagData(tag: Tag) {
if (!tag.techList.contains("android.nfc.tech.NfcA")) {
return
}
val amiibo = NfcA.get(tag) ?: return
amiibo.connect()
val tagData = ntag215ReadAll(amiibo) ?: return
NativeLibrary.onReadNfcTag(tagData)
nfcAdapter?.ignore(
tag,
1000,
{ NativeLibrary.onRemoveNfcTag() },
Handler(Looper.getMainLooper())
)
}
private fun ntag215ReadAll(amiibo: NfcA): ByteArray? {
val bufferSize = amiibo.maxTransceiveLength;
val tagSize = 0x21C
val pageSize = 4
val lastPage = tagSize / pageSize - 1
val tagData = ByteArray(tagSize)
// We need to read the ntag in steps otherwise we overflow the buffer
for (i in 0..tagSize step bufferSize - 1) {
val dataStart = i / pageSize
var dataEnd = (i + bufferSize) / pageSize
if (dataEnd > lastPage) {
dataEnd = lastPage
}
try {
val data = ntag215FastRead(amiibo, dataStart, dataEnd - 1)
System.arraycopy(data, 0, tagData, i, (dataEnd - dataStart) * pageSize)
} catch (e: IOException) {
return null;
}
}
return tagData
}
private fun ntag215Read(amiibo: NfcA, page: Int): ByteArray? {
return amiibo.transceive(
byteArrayOf(
0x30.toByte(),
(page and 0xFF).toByte()
)
)
}
private fun ntag215FastRead(amiibo: NfcA, start: Int, end: Int): ByteArray? {
return amiibo.transceive(
byteArrayOf(
0x3A.toByte(),
(start and 0xFF).toByte(),
(end and 0xFF).toByte()
)
)
}
private fun ntag215PWrite(
amiibo: NfcA,
page: Int,
data1: Int,
data2: Int,
data3: Int,
data4: Int
): ByteArray? {
return amiibo.transceive(
byteArrayOf(
0xA2.toByte(),
(page and 0xFF).toByte(),
(data1 and 0xFF).toByte(),
(data2 and 0xFF).toByte(),
(data3 and 0xFF).toByte(),
(data4 and 0xFF).toByte()
)
)
}
private fun ntag215PwdAuth(
amiibo: NfcA,
data1: Int,
data2: Int,
data3: Int,
data4: Int
): ByteArray? {
return amiibo.transceive(
byteArrayOf(
0x1B.toByte(),
(data1 and 0xFF).toByte(),
(data2 and 0xFF).toByte(),
(data3 and 0xFF).toByte(),
(data4 and 0xFF).toByte()
)
)
}
}
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