Node / meshtastic / Meshtastic-Android / files / core / nfc / src / androidMain / kotlin / org / meshtastic / core / nfc / NfcScanner.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.core.nfc

Tff7b72import T7ee787android.app.Activity

Tff7b72import T7ee787android.nfc.FormatException

Tff7b72import T7ee787android.nfc.NdefMessage

Tff7b72import T7ee787android.nfc.NdefRecord

Tff7b72import T7ee787android.nfc.NfcAdapter

Tff7b72import T7ee787android.nfc.Tag

Tff7b72import T7ee787android.nfc.tech.Ndef

Tff7b72import T7ee787androidx.compose.runtime.Composable

Tff7b72import T7ee787androidx.compose.runtime.DisposableEffect

Tff7b72import T7ee787androidx.compose.runtime.getValue

Tff7b72import T7ee787androidx.compose.runtime.remember

Tff7b72import T7ee787androidx.compose.runtime.rememberUpdatedState

Tff7b72import T7ee787androidx.compose.ui.platform.LocalContext

Tff7b72import T7ee787co.touchlab.kermit.Logger

Tff7b72import T7ee787java.io.IOException

Tf0883e@Composable

Tff7b72fun Td2a8ffNfcScannerEffectTb4b4b4(Te6edf3onResultTb4b4b4: Tb4b4b4(Tffa657String?Tb4b4b4) Tff7b72-Tff7b72> Tffa657UnitTb4b4b4, Te6edf3onNfcDisabledTb4b4b4: Tb4b4b4(Tb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657UnitTb4b4b4)Tff7b72? Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3context Tff7b72= Te6edf3LocalContextTb4b4b4.Te6edf3current

Tff7b72val Te6edf3activity Tff7b72= Te6edf3context Tff7b72as? Te6edf3Activity Tff7b72?: Tff7b72return

Tff7b72val Te6edf3nfcAdapter Tff7b72= Te6edf3remember Tb4b4b4{ Te6edf3NfcAdapterTb4b4b4.Te6edf3getDefaultAdapterTb4b4b4(Te6edf3contextTb4b4b4) Tb4b4b4}

Te6edf3DisposableEffectTb4b4b4(Te6edf3nfcAdapterTb4b4b4) Tb4b4b4{

Tff7b72if Tb4b4b4(Te6edf3nfcAdapter Tff7b72=Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Te6edf3onDispose Tb4b4b4{Tb4b4b4}

Tb4b4b4} Tff7b72else Tff7b72if Tb4b4b4(Tff7b72!Te6edf3nfcAdapterTb4b4b4.Te6edf3isEnabledTb4b4b4) Tb4b4b4{

Te6edf3onNfcDisabledTff7b72?.Te6edf3invokeTb4b4b4(Tb4b4b4)

Te6edf3onDispose Tb4b4b4{Tb4b4b4}

Tb4b4b4} Tff7b72else Tb4b4b4{

Tff7b72val Te6edf3readerCallback Tff7b72= Te6edf3NfcAdapterTb4b4b4.Te6edf3ReaderCallback Tb4b4b4{ Te6edf3tagTb4b4b4: Te6edf3Tag Tff7b72-Tff7b72> Te6edf3handleNfcTagTb4b4b4(Te6edf3tagTb4b4b4, Te6edf3onResultTb4b4b4) Tb4b4b4}

Tff7b72val Te6edf3flags Tff7b72=

Tb4b4b4(

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_A Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_B Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_F Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_V Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_BARCODE

Tb4b4b4)

Te6edf3nfcAdapterTb4b4b4.Te6edf3enableReaderModeTb4b4b4(Te6edf3activityTb4b4b4, Te6edf3readerCallbackTb4b4b4, Te6edf3flagsTb4b4b4, Tff7b72nullTb4b4b4)

Te6edf3onDispose Tb4b4b4{ Te6edf3nfcAdapterTb4b4b4.Te6edf3disableReaderModeTb4b4b4(Te6edf3activityTb4b4b4) Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

T8b949e/**

* Writes [url] (a Meshtastic shared-contact or channel-set URL) to the next NDEF tag tapped against the phone. Mirrors

* [NfcScannerEffect]: keep it composed while a write is armed, dispose to disarm. [onResult] reports write success.

*/

Tf0883e@Composable

Tff7b72fun Td2a8ffNfcWriterEffectTb4b4b4(Te6edf3urlTb4b4b4: Tffa657StringTb4b4b4, Te6edf3onResultTb4b4b4: Tb4b4b4(Tffa657BooleanTb4b4b4) Tff7b72-Tff7b72> Tffa657UnitTb4b4b4, Te6edf3onNfcDisabledTb4b4b4: Tb4b4b4(Tb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657UnitTb4b4b4)Tff7b72? Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3context Tff7b72= Te6edf3LocalContextTb4b4b4.Te6edf3current

Tff7b72val Te6edf3activity Tff7b72= Te6edf3context Tff7b72as? Te6edf3Activity Tff7b72?: Tff7b72return

Tff7b72val Te6edf3nfcAdapter Tff7b72= Te6edf3remember Tb4b4b4{ Te6edf3NfcAdapterTb4b4b4.Te6edf3getDefaultAdapterTb4b4b4(Te6edf3contextTb4b4b4) Tb4b4b4}

Tff7b72val Te6edf3currentOnResult Tff7b72by Te6edf3rememberUpdatedStateTb4b4b4(Te6edf3onResultTb4b4b4)

Tff7b72val Te6edf3currentOnNfcDisabled Tff7b72by Te6edf3rememberUpdatedStateTb4b4b4(Te6edf3onNfcDisabledTb4b4b4)

Te6edf3DisposableEffectTb4b4b4(Te6edf3nfcAdapterTb4b4b4, Te6edf3urlTb4b4b4) Tb4b4b4{

Tff7b72if Tb4b4b4(Te6edf3nfcAdapter Tff7b72=Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

T8b949e// No NFC hardware: report failure so the armed write UI doesn't hang waiting for a tap.

Te6edf3currentOnResultTb4b4b4(Tff7b72falseTb4b4b4)

Te6edf3onDispose Tb4b4b4{Tb4b4b4}

Tb4b4b4} Tff7b72else Tff7b72if Tb4b4b4(Tff7b72!Te6edf3nfcAdapterTb4b4b4.Te6edf3isEnabledTb4b4b4) Tb4b4b4{

Te6edf3currentOnNfcDisabledTff7b72?.Te6edf3invokeTb4b4b4(Tb4b4b4)

Te6edf3onDispose Tb4b4b4{Tb4b4b4}

Tb4b4b4} Tff7b72else Tb4b4b4{

Tff7b72val Te6edf3readerCallback Tff7b72= Te6edf3NfcAdapterTb4b4b4.Te6edf3ReaderCallback Tb4b4b4{ Te6edf3tagTb4b4b4: Te6edf3Tag Tff7b72-Tff7b72> Te6edf3currentOnResultTb4b4b4(Te6edf3writeNdefUrlTb4b4b4(Te6edf3tagTb4b4b4, Te6edf3urlTb4b4b4)Tb4b4b4) Tb4b4b4}

Tff7b72val Te6edf3flags Tff7b72=

Tb4b4b4(

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_A Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_B Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_F Te6edf3or

Te6edf3NfcAdapterTb4b4b4.Te6edf3FLAG_READER_NFC_V

Tb4b4b4)

Te6edf3nfcAdapterTb4b4b4.Te6edf3enableReaderModeTb4b4b4(Te6edf3activityTb4b4b4, Te6edf3readerCallbackTb4b4b4, Te6edf3flagsTb4b4b4, Tff7b72nullTb4b4b4)

Te6edf3onDispose Tb4b4b4{ Te6edf3nfcAdapterTb4b4b4.Te6edf3disableReaderModeTb4b4b4(Te6edf3activityTb4b4b4) Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tff7b72private Tff7b72fun Td2a8ffwriteNdefUrlTb4b4b4(Te6edf3tagTb4b4b4: Te6edf3TagTb4b4b4, Te6edf3urlTb4b4b4: Tffa657StringTb4b4b4)Tb4b4b4: Tffa657Boolean Tb4b4b4{

Tff7b72val Te6edf3ndef Tff7b72= Te6edf3NdefTb4b4b4.Te6edf3getTb4b4b4(Te6edf3tagTb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3ndef Tff7b72=Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Ta5d6ffTag does not support NDEFTa5d6ff" Tb4b4b4}

Tff7b72return Tff7b72false

Tb4b4b4}

Tff7b72val Te6edf3message Tff7b72= Te6edf3NdefMessageTb4b4b4(Te6edf3NdefRecordTb4b4b4.Te6edf3createUriTb4b4b4(Te6edf3urlTb4b4b4)Tb4b4b4)

Tff7b72return Tff7b72try Tb4b4b4{

Te6edf3ndefTb4b4b4.Te6edf3connectTb4b4b4(Tb4b4b4)

Tff7b72when Tb4b4b4{

Tff7b72!Te6edf3ndefTb4b4b4.Te6edf3isWritable Tff7b72-Tff7b72> Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Ta5d6ffNDEF tag is read-onlyTa5d6ff" Tb4b4b4}

Tff7b72false

Tb4b4b4}

Te6edf3ndefTb4b4b4.Te6edf3maxSize Tff7b72< Te6edf3messageTb4b4b4.Te6edf3byteArrayLength Tff7b72-Tff7b72> Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Ta5d6ffNDEF tag too small: Tffd700${Te6edf3ndefTb4b4b4.Te6edf3maxSizeTffd700}Ta5d6ff < Tffd700${Te6edf3messageTb4b4b4.Te6edf3byteArrayLengthTffd700}Ta5d6ff" Tb4b4b4}

Tff7b72false

Tb4b4b4}

Tff7b72else Tff7b72-Tff7b72> Tb4b4b4{

Te6edf3ndefTb4b4b4.Te6edf3writeNdefMessageTb4b4b4(Te6edf3messageTb4b4b4)

Tff7b72true

Tb4b4b4}

Tb4b4b4}

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IOExceptionTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffError writing NDEF tagTa5d6ff" Tb4b4b4}

Tff7b72false

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3FormatExceptionTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffMalformed NDEF messageTa5d6ff" Tb4b4b4}

Tff7b72false

Tb4b4b4} Tff7b72finally Tb4b4b4{

Tff7b72try Tb4b4b4{

Te6edf3ndefTb4b4b4.Te6edf3closeTb4b4b4(Tb4b4b4)

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IOExceptionTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffError closing NDEFTa5d6ff" Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tff7b72private Tff7b72fun Td2a8ffhandleNfcTagTb4b4b4(Te6edf3tagTb4b4b4: Te6edf3TagTb4b4b4, Te6edf3onResultTb4b4b4: Tb4b4b4(Tffa657String?Tb4b4b4) Tff7b72-Tff7b72> Tffa657UnitTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3ndef Tff7b72= Te6edf3NdefTb4b4b4.Te6edf3getTb4b4b4(Te6edf3tagTb4b4b4) Tff7b72?: Tff7b72return

Tff7b72try Tb4b4b4{

Te6edf3ndefTb4b4b4.Te6edf3connectTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3ndefMessage Tff7b72= Te6edf3ndefTb4b4b4.Te6edf3ndefMessage Tff7b72?: Tff7b72return

Tff7b72for Tb4b4b4(Te6edf3record Tff7b72in Te6edf3ndefMessageTb4b4b4.Te6edf3recordsTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3payload Tff7b72= Te6edf3recordTb4b4b4.Te6edf3toUriTb4b4b4(Tb4b4b4)Tff7b72?.Te6edf3toStringTb4b4b4(Tb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3payload Tff7b72!Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Te6edf3onResultTb4b4b4(Te6edf3payloadTb4b4b4)

Tff7b72break

Tb4b4b4}

Tb4b4b4}

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IOExceptionTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffError reading NDEF tagTa5d6ff" Tb4b4b4}

Tb4b4b4} Tff7b72finally Tb4b4b4{

Tff7b72try Tb4b4b4{

Te6edf3ndefTb4b4b4.Te6edf3closeTb4b4b4(Tb4b4b4)

Tb4b4b4} Tff7b72catch Tb4b4b4(Te6edf3eTb4b4b4: Te6edf3IOExceptionTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ffError closing NDEFTa5d6ff" Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}