FirebaseAuthManager.kt

class FirebaseAuthManager {

    private var mAuth: FirebaseAuth? = null

    init {
        this.mAuth = FirebaseAuth.getInstance()
    }

    fun initializeAuthListener(authListener: IFirebaseAuthListener) {
        this.mAuth?.addAuthStateListener { firebaseAuth ->
            if (firebaseAuth.currentUser == null) {
                authListener.onSignOut()
            }

        }
    }

    fun reAuthenticateUser(password: String, authanticateListener: IFirebaseAuthenticateListener) {
        this.mAuth?.currentUser?.let {
            val credential = EmailAuthProvider
                .getCredential(it.email!!, password)

            it.reauthenticate(credential)
                ?.addOnCompleteListener { task ->
                    if (task.isSuccessful) {
                        authanticateListener.onComplated()
                    } else {
                        authanticateListener.onFailed()

                    }
                }

        } ?: authanticateListener.onFailed()

    }

    fun isUserLoggedIn(): Boolean {
        mAuth?.currentUser?.let {
            return true
        } ?: return false
    }

    fun getUserId(): String? {
        return mAuth?.currentUser?.uid
    }

    fun signOut() {
        mAuth?.signOut()
    }

    fun signIn(password: String, email: String, authanticateListener: IFirebaseAuthenticateListener) {
        mAuth?.signInWithEmailAndPassword(email, password)

            ?.addOnCompleteListener { task ->
                if (task.isSuccessful) {
                    authanticateListener.onComplated()
                } else {
                    authanticateListener.onFailed()
                }

            }
    }

    fun signUp(password: String, email: String, authanticateListener: IFirebaseAuthenticateListener) {
        mAuth?.createUserWithEmailAndPassword(email, password)

            ?.addOnCompleteListener { task ->
                if (task.isSuccessful) {
                    authanticateListener.onComplated()
                } else {
                    authanticateListener.onFailed()
                }

            }
    }

    fun resetPassword(email: String, authanticateListener: IFirebaseAuthenticateListener) {
        mAuth?.sendPasswordResetEmail(email)
            ?.addOnCompleteListener { task ->
                if (task.isSuccessful)
                    authanticateListener.onComplated()
                else
                    authanticateListener.onFailed()
            }
    }
}