<---------------------------------------------activity_register.xml------------------------------------------------------->

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto">
<data xmlns:android="http://schemas.android.com/apk/res/android">

    <variable
            name="viewmodel"
            type="tv.myproject.app.ui.auth.RegisterViewModel" />
</data>
    <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/coordinatorLayout"
            tools:context=".activity.RegisterActivity"
            android:background="@drawable/auth_bg">
        <TextView
                android:layout_width="153dp"
                android:layout_height="20dp"
                android:id="@+id/textView"
                android:textAppearance="@style/TextAppearance.AppCompat.Display2" android:textSize="18sp"
                android:textColor="@android:color/white" android:gravity="center"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                android:textAllCaps="true" android:text="create id"
                app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintVertical_bias="0.045"
                android:layout_marginTop="8dp" app:layout_constraintTop_toTopOf="parent"/>
        <EditText
                android:hint="@string/user_name"
                android:layout_width="342dp"
                android:backgroundTint="#40FFFFFF"
                android:textColorHint="#99FFFFFF"
                android:layout_height="wrap_content"
                android:inputType="text"
                android:ems="10"
                android:id="@+id/user_name"
                android:textColor="@android:color/white"
                android:selectAllOnFocus="true" android:gravity="center" android:textSize="16sp"
                android:layout_marginStart="8dp" app:layout_constraintStart_toStartOf="parent"
                android:layout_marginLeft="8dp" android:layout_marginEnd="8dp" app:layout_constraintEnd_toEndOf="parent"
                android:layout_marginRight="8dp"
                android:paddingBottom="24dp"
                app:layout_constraintTop_toBottomOf="@+id/textView"
                app:layout_constraintHorizontal_bias="0.509"
                android:layout_marginTop="8dp" app:layout_constraintBottom_toBottomOf="parent"
                android:layout_marginBottom="8dp" app:layout_constraintVertical_bias="0.027"/>
        <EditText
                android:hint="@string/password"
                android:text="@={viewmodel.password}"
                android:onTextChanged="@{viewmodel::onPasswordChanged}"
                android:layout_width="342dp"
                android:backgroundTint="#40FFFFFF"
                android:textColorHint="#99FFFFFF"
                android:layout_height="wrap_content"
                android:inputType="textPassword"
                android:ems="10"
                android:id="@+id/password"
                android:textColor="@android:color/white"
                android:selectAllOnFocus="true" android:gravity="center" android:textSize="16sp"
                android:layout_marginStart="8dp" app:layout_constraintStart_toStartOf="parent"
                android:layout_marginLeft="8dp" android:layout_marginEnd="8dp" app:layout_constraintEnd_toEndOf="parent"
                android:layout_marginRight="8dp"
                android:paddingBottom="24dp"
                app:layout_constraintHorizontal_bias="0.509" android:layout_marginTop="50dp"
                app:layout_constraintTop_toTopOf="@+id/user_name"/>
        <EditText
                android:hint="@string/email_address"
                android:text="@{viewmodel.email}"
                android:error="@{viewmodel.errorMessage}"
                android:onTextChanged="@{viewmodel::onEmailChanged}"
                android:layout_width="342dp"
                android:backgroundTint="#40FFFFFF"
                android:textColorHint="#99FFFFFF"
                android:layout_height="wrap_content"
                android:inputType="textEmailAddress"
                android:ems="10"
                android:id="@+id/email_address"
                android:textColor="@android:color/white"
                android:selectAllOnFocus="true" android:gravity="center" android:textSize="16sp"
                android:layout_marginStart="8dp" app:layout_constraintStart_toStartOf="parent"
                android:layout_marginLeft="8dp" android:layout_marginEnd="8dp" app:layout_constraintEnd_toEndOf="parent"
                android:layout_marginRight="8dp"
                android:paddingBottom="24dp"
                android:layout_marginTop="50dp" app:layout_constraintTop_toTopOf="@+id/password"/>
        <TextView
                android:text="@string/by_registering"
                android:autoLink="all"
                android:linksClickable="true"
                android:onClick="redirectToRegister"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/privacy_and_terms"
                android:textAppearance="@style/TextAppearance.AppCompat.Display2"
                android:textColor="@android:color/white"
                android:textSize="16sp" android:gravity="center"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.496"
                app:layout_constraintTop_toBottomOf="@+id/email_address"
                android:layout_marginBottom="8dp" app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintVertical_bias="0.104"/>
        <Button
                android:text="create account"
                android:layout_width="335dp"
                android:layout_height="45dp"
                android:id="@+id/register"
                android:onClick="@{()->viewmodel.register()}"
                android:enabled="@{viewmodel.btnSelected}"
                android:background="@drawable/auth_button"
                android:textAppearance="@style/TextAppearance.AppCompat.Display2" android:textSize="18sp"
                android:textAllCaps="true" android:textColor="@android:color/white" android:layout_marginStart="8dp"
                app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="8dp"
                android:layout_marginEnd="8dp" app:layout_constraintEnd_toEndOf="parent"
                android:layout_marginRight="8dp" android:layout_marginBottom="8dp"
                app:layout_constraintBottom_toBottomOf="parent"
                android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="@+id/constraintLayout3"
                app:layout_constraintVertical_bias="0.088"/>
        <ImageView
                android:onClick="closeWindow"
                android:layout_width="15dp"
                android:layout_height="15dp" app:srcCompat="@drawable/close_icon"
                android:id="@+id/close_button"
                android:layout_marginTop="30dp" app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="16dp"
                android:layout_marginRight="16dp" app:layout_constraintStart_toStartOf="parent"
                android:layout_marginLeft="8dp" android:layout_marginStart="8dp" android:layout_marginBottom="8dp"
                app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintHorizontal_bias="0.981"
                app:layout_constraintVertical_bias="0.018"/>
        <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="wrap_content"
                android:layout_height="28dp"
                app:layout_constraintTop_toBottomOf="@+id/privacy_and_terms"
                app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp" app:layout_constraintEnd_toEndOf="parent"
                android:layout_marginEnd="8dp" android:layout_marginRight="8dp" android:id="@+id/constraintLayout3">

            <TextView
                    android:text="@string/privacy_policy"
                    android:onClick="openPrivacyLink"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/privacy_policy"
                    android:textAppearance="@style/TextAppearance.AppCompat.Display2" android:textSize="16sp"
                    android:textColor="@android:color/white" app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintEnd_toStartOf="@+id/terms_of_use"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"/>
            <TextView
                    android:text="@string/terms_of_use"
                    android:onClick="openTermsLink"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/terms_of_use"
                    android:textAppearance="@style/TextAppearance.AppCompat.Display2" android:textSize="16sp"
                    android:textColor="@android:color/white" app:layout_constraintStart_toEndOf="@+id/privacy_policy"
                    android:layout_marginStart="5dp" android:layout_marginLeft="5dp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"/>
        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

<---------------------------------------------RegisterViewModel.kt------------------------------------------------------->

package tv.myproject.app.ui.auth

import android.util.Log
import androidx.databinding.ObservableBoolean
import androidx.databinding.ObservableField
import androidx.lifecycle.ViewModel
import kotlinx.coroutines.*
import tv.myproject.app.api.HotpotAPI
import tv.myproject.app.api.HotpotRepository
import tv.myproject.app.util.Util
import kotlin.coroutines.CoroutineContext

class RegisterViewModel : ViewModel() {
    private val parentJob = Job()

    private val coroutineContext: CoroutineContext
        get() = parentJob + Dispatchers.Default

    private val scope = CoroutineScope(coroutineContext)
    private val repository : HotpotRepository= HotpotRepository(HotpotAPI.api)

    var authToken: String? = "no token"
    var userId: Long? = null

//    binding stuff
    var btnSelected: ObservableBoolean? = ObservableBoolean(false)
    var email: ObservableField<String>? =  ObservableField("")
    var password: ObservableField<String>? =  ObservableField("")
    var errorMessage: ObservableField<String>? =  ObservableField("")
//    end of binding stuff

    //functions checking to disable button
    fun onEmailChanged(s: CharSequence, start: Int, befor: Int, count: Int) {
        btnSelected?.set(Util.isEmailValid(s.toString()) && password?.get()!!.length >= 8)
        if(s.toString().length < 8){
            errorMessage?.set("Too short input")
        }
        email?.set(s.toString())
    }

    fun onPasswordChanged(s: CharSequence, start: Int, befor: Int, count: Int) {
        btnSelected?.set(Util.isEmailValid(email?.get()!!) && s.toString().length >= 8)
    }



    fun register(){
        val handler = CoroutineExceptionHandler { _, exception ->
            println("Caught $exception")
        }

        scope.launch(handler) {
            val res = repository.userRegister("test${Math.random() * 1000000}@foo.com", "testtest")
            res?.run {
                authToken = token
                userId = user.id
            }
        }
    }

    fun cancelAllRequests() = coroutineContext.cancel()
}

<---------------------------------------------RegisterActivity.kt------------------------------------------------------->



package tv.myproject.app.activity


import android.content.Intent
import android.content.res.Resources
import android.net.Uri
import android.os.Bundle
import android.view.View
import android.widget.TextView
import androidx.appcompat.app.AlertDialog
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.ViewModelProviders
import tv.myproject.app.DatePickerFragment
import tv.myproject.app.databinding.ActivityRegisterBinding
import tv.myproject.app.ui.auth.RegisterViewModel


class RegisterActivity : BaseActivityFullscreen() {


    var binding: ActivityRegisterBinding? = null
    var viewmodel: RegisterViewModel? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, tv.myproject.app.R.layout.activity_register)
        viewmodel = ViewModelProviders.of(this).get(RegisterViewModel::class.java)
        binding?.viewmodel = viewmodel
    }

    fun openTermsLink(view:View) {
        val url = "https://stackoverflow.com/" //TODO: change to appropriate link
        val i = Intent(Intent.ACTION_VIEW)
        i.data = Uri.parse(url)
        startActivity(i)
    }

    fun openPrivacyLink(view:View) {
        val url = "https://github.com/"  //TODO: change to appropriate link
        val i = Intent(Intent.ACTION_VIEW)
        i.data = Uri.parse(url)
        startActivity(i)
    }

    fun closeWindow(view:View) {
        val loginIntent = Intent(this, LoginActivity::class.java)
        startActivity(loginIntent)
    }
}