4. カードリーダーと連携する – SuicaのIDを読み取る

#① Install nfcpy
$ sudo pip install -U nfcpy
# ②In the list of USB devices, check if Pasori is recognized (ID below is masked)
$ lsusb | grep Sony
> Bus 001 Device 008: ID ******** Sony Corp. RC-S380/S
# ③if displayed as 'No such device'
$ python -m nfc
$ sudo reboot
# Ref: https://www.out48.com/archives/5396/

import nfc
import binascii
// Ref: https://qiita.com/h_tyokinuhata/items/2733d3c5bc126d5d4445
def read_id():
    print("Touch!")
    clf = nfc.ContactlessFrontend("usb")
    tag = clf.connect(rdwr={'on-connect': lambda tag: False})
    tag_id = binascii.hexlify(tag._nfcid).decode()
    clf.close()
    return tag_id

dependencies: [
     .package(url: "https://github.com/pvieito/PythonKit", branch: "master"),
     .package(url: "https://github.com/kylef/PathKit", from: "1.0.0"),
],

import PythonKit
import PathKit
func readNfcId() -> String {
    let sys = Python.import("sys")
    let path = "\(Path.current)/Sources/SwiftHomePi" // ①Specify the path of Python file
    sys.path.append(path)
    let readNfc = Python.import("read_nfc") ②import Python file
    return readNfc.read_id().description // ③Call the Read_id of the Python file
}

let id = PythonCall().readNfcId()
guard let savedNfcId = try await DataStore.shared.fetchNfcId() else { // ①Fetch registered ID
    print("Cannot find NfcId in sqlite DB")
    return
}
if id == savedNfcId.nfcId {
    print("This card is registered!")
} else {
    print("This card is not registered")
}

import Foundation
import CoreNFC
import TRETJapanNFCReader_FeliCa
import TRETJapanNFCReader_FeliCa_TransitIC

final class CardReaderViewModel: NSObject, ObservableObject {
    @Published private(set) var suicaId = ""
    private var reader: TransitICReader!
    private var transitICCardData: TransitICCardData?

    override init() {
        super.init()
        reader = TransitICReader(delegate: self)
    }

    func readCard() {
        reader.get(itemTypes: TransitICCardItemType.allCases)
    }
    // (Omit: Post Suica ID to SwiftHomeServer)
}

extension CardReaderViewModel: FeliCaReaderSessionDelegate {
    func feliCaReaderSession(didRead feliCaCardData: FeliCaCardData, pollingErrors: [FeliCaSystemCode : Error?]?, readErrors: [FeliCaSystemCode : [FeliCaServiceCode : Error]]?) {
        let suicaId = feliCaCardData.primaryIDm
        DispatchQueue.main.async {
            self.suicaId = suicaId
        }
    }

    func feliCaReaderSession(didInvalidateWithError pollingErrors: [FeliCaSystemCode : Error?]?, readErrors: [FeliCaSystemCode : [FeliCaServiceCode : Error]]?) {
    }

    func japanNFCReaderSession(didInvalidateWithError error: Error) {
    }
}