Praudyog

package com.ammyai.truecaller

import android.app.Activity
import android.content.Intent
import com.facebook.react.bridge.*
import com.truecaller.android.sdk.*

import java.math.BigInteger
import java.security.SecureRandom

class TruecallerModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext), TcOAuthCallback {

    private var promise: Promise? = null
    private var stateRequested: String? = null
    private var codeVerifier: String? = null

    override fun getName(): String {
        return "TruecallerAuth"
    }

    @ReactMethod
    fun isTruecallerInstalled(promise: Promise) {
        val sdk = TcSdk.getInstance()
        promise.resolve(sdk.isOAuthFlowUsable)
    }

    @ReactMethod
    fun login(promise: Promise) {
        val activity = currentActivity ?: run {
            promise.reject("NO_ACTIVITY", "Activity is null")
            return
        }

        this.promise = promise

        // Step 6: Generate unique state parameter
        stateRequested = BigInteger(130, SecureRandom()).toString(32)

        // Step 7: Generate unique code verifier
        codeVerifier = CodeVerifierUtil.generateRandomCodeVerifier()

        // Step 8: Generate code challenge
        val codeChallenge = CodeVerifierUtil.getCodeChallenge(codeVerifier)

        val options = TcSdkOptions.Builder(activity, this)
            .sdkKey("YOUR_CLIENT_ID")  // Replace with actual Client ID
            .setOAuthState(stateRequested)  // Step 6: Set state
            .setOAuthScopes(arrayOf("profile", "phone", "email"))  // Step 6: Request scopes
            .setCodeChallenge(codeChallenge ?: "")
            .buttonColor(Color.parseColor("#007AFF"))
            .buttonTextColor(Color.parseColor("#FFFFFF"))
            .loginTextPrefix(TcSdkOptions.LOGIN_TEXT_PREFIX_TO_GET_STARTED)
            .ctaText(TcSdkOptions.CTA_TEXT_CONTINUE)
            .buttonShapeOptions(TcSdkOptions.BUTTON_SHAPE_ROUNDED)
            .footerType(TcSdkOptions.FOOTER_TYPE_SKIP)
            .consentTitleOption(TcSdkOptions.SDK_CONSENT_TITLE_LOG_IN)
            .sdkOptions(TcSdkOptions.OPTION_VERIFY_ONLY_TC_USERS)
            .build()

        TcSdk.init(options) // Step 4: Initialize Truecaller SDK
        TcSdk.getInstance().launchTcOAuth(activity)
    }

    override fun onSuccess(tcOAuthData: TcOAuthData) {
        // Step 6: Validate state
        if (stateRequested != tcOAuthData.state) {
            promise?.reject("STATE_MISMATCH", "State validation failed.")
            return
        }

        // Step 9: Return authorization data
        promise?.resolve(Arguments.createMap().apply {
            putString("authorizationCode", tcOAuthData.authorizationCode)
            putString("state", tcOAuthData.state)
            putArray("scopesGranted", Arguments.fromList(tcOAuthData.scopesGranted))
        })
    }

    override fun onFailure(tcOAuthError: TcOAuthError) {
        promise?.reject(tcOAuthError.errorType.name, tcOAuthError.errorMessage)
    }

    @ReactMethod
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == TcSdk.SHARE_PROFILE_REQUEST_CODE) {
            TcSdk.getInstance().onActivityResultObtained(currentActivity, requestCode, resultCode, data)
        }
    }
}