Moved login and signUp actions from LoginActivity to UserManager

.idea/misc.xml

@@ -25,7 +25,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

app/src/main/java/com/paktalin/vocabularynotebook/UserManager.kt

 package com.paktalin.vocabularynotebook
 
 import android.util.Log
+import com.google.firebase.auth.FirebaseAuth
 import com.google.firebase.auth.FirebaseUser
 import com.paktalin.vocabularynotebook.appsetup.ConfiguredFirestore
 import com.paktalin.vocabularynotebook.ui.activities.LogInActivity
@@ -9,17 +10,15 @@ import com.paktalin.vocabularynotebook.firestoreitems.Vocabulary
 import com.paktalin.vocabularynotebook.firestoreitems.Vocabulary.Companion.VOCABULARIES
 import java.util.*
 
-class UserManager {
-    companion object {
-        private val TAG = "VN/" + UserManager::class.simpleName
+private const val TAG = "VN/UserManager"
 
-        private fun deleteUser(user: FirebaseUser) {
+private fun deleteUser(user: FirebaseUser) {
     user.delete()
             .addOnSuccessListener { Log.i(TAG, "UserPojo was successfully deleted") }
             .addOnFailureListener { Log.i(TAG, "deleteUser:failure", it.cause)}
-        }
+}
 
-        fun addNewUserToDb(newUser: FirebaseUser, logInActivity: LogInActivity) {
+fun addNewUserToDb(newUser: FirebaseUser, logInActivity: LogInActivity) {
     //todo add condition to writing to the db in Firebase Console (request.auth.uid)
     val db = ConfiguredFirestore.instance
     val user = UserPojo(newUser.email)
@@ -30,18 +29,43 @@ class UserManager {
                 user.vocabularies = Collections.singletonList(firstVocabularyRef)
 
                 db.collection("users").document(newUser.uid).set(user)
-                                .addOnCompleteListener({ task ->
+                        .addOnCompleteListener { task ->
                             if (task.isSuccessful) {
                                 Log.i(TAG, "Successfully added user to the collection")
                                 logInActivity.startUserActivity()
+                            } else Log.w(TAG, "addUser:failure", task.exception)
                         }
-                                    else Log.w(TAG, "addUser:failure", task.exception)
-                                })
             }
             .addOnFailureListener {
                 Log.w(TAG, "Couldn't add user to the database", it.cause)
-                        UserManager.deleteUser(newUser)
+                deleteUser(newUser)
+            }
+}
+
+fun login(onComplete: () -> Unit, onSuccess: () -> Unit, onFailure: () -> Unit,
+          mAuth: FirebaseAuth?, email: String, password: String) {
+    mAuth!!.signInWithEmailAndPassword(email, password)
+            .addOnCompleteListener { onComplete() }
+            .addOnSuccessListener {
+                Log.d(TAG, "Successfully signed in")
+                onSuccess()
             }
+            .addOnFailureListener {
+                Log.w(TAG, "signInWithEmail:failure", it)
+                onFailure()
             }
+}
+
+fun signUp(mAuth: FirebaseAuth?, activity: LogInActivity, email: String, password: String) {
+    mAuth!!.createUserWithEmailAndPassword(email, password)
+            .addOnCompleteListener { removeProgressBar(activity.supportFragmentManager) }
+            .addOnSuccessListener {
+                Log.d(TAG, "Successfully signed up a new user")
+                addNewUserToDb(mAuth.currentUser!!, activity)
+                activity.login()
+            }
+            .addOnFailureListener {
+                Log.d(TAG, "createUserWithEmail:failure", it.fillInStackTrace())
+                shortToast(activity, it.message!!)
             }
 }

app/src/main/java/com/paktalin/vocabularynotebook/ui/activities/LogInActivity.kt

@@ -12,15 +12,17 @@ import kotlinx.android.synthetic.main.activity_log_in.*
 
 class LogInActivity : AppCompatActivity() {
     private var mAuth: FirebaseAuth? = null
+    private var email: String? = null
+    private var password: String? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_log_in)
 
         mAuth = FirebaseAuth.getInstance()
-        btnLogIn!!.setOnClickListener({ logIn() })
-        btnSignUp!!.setOnClickListener({ signUp() })
-        btnRandomUser!!.setOnClickListener({ createRandomUser() })
+        btnLogIn!!.setOnClickListener { login() }
+        btnSignUp!!.setOnClickListener { signUp() }
+        btnRandomUser!!.setOnClickListener { createRandomUser() }
     }
 
     override fun onStart() {
@@ -28,43 +30,22 @@ class LogInActivity : AppCompatActivity() {
         if (mAuth!!.currentUser != null) { startUserActivity() }
     }
 
-    private fun logIn() {
-        val email = etEmail!!.text.toString()
-        val password = etPassword!!.text.toString()
-
-        if (fieldsNotEmpty(email, password, "Please, enter email and password", this)) {
-            showProgressBar()
-            mAuth!!.signInWithEmailAndPassword(email, password)
-                    .addOnCompleteListener { hideProgressBar() }
-                    .addOnSuccessListener {
-                        Log.d(TAG, "Successfully signed in")
-                        startUserActivity()
-                    }
-                    .addOnFailureListener {
-                        Log.w(TAG, "signInWithEmail:failure", it)
-                        shortToast(this@LogInActivity, getString(R.string.toast_auth_failed))
-                    }
-        }
-    }
+    fun login() {
+        processUser { login(
+                    { removeProgressBar() },
+                    { startUserActivity() },
+                    { showToastFailure() },
+                    mAuth, email!!, password!!) } }
 
-    private fun signUp() {
-        val email = etEmail!!.text.toString()
-        val password = etPassword!!.text.toString()
-
-        if (fieldsNotEmpty(email, password, "Please, enter email and password", this)) {
-            //todo check if the password is good
-            // todo verify email
-            showProgressBar()
-            mAuth!!.createUserWithEmailAndPassword(email, password)
-                    .addOnCompleteListener { hideProgressBar() }
-                    .addOnSuccessListener { _ ->
-                        Log.d(TAG, "Successfully signed up a new user")
-                        UserManager.addNewUserToDb(mAuth!!.currentUser!!, this)
-                    }
-                    .addOnFailureListener {
-                        Log.d(TAG, "createUserWithEmail:failure", it.fillInStackTrace())
-                        shortToast(this@LogInActivity, it.message!!)
-                    }
+    private fun signUp() { processUser { signUp(mAuth, this, email!!, password!!) } }
+
+    private fun processUser(authAction: () -> Unit) {
+        email = etEmail!!.text.toString()
+        password = etPassword!!.text.toString()
+
+        if (fieldsNotEmpty(email!!, password!!, "Please, enter email and password", this)) {
+            addProgressBar()
+            authAction()
         }
     }
 
@@ -74,15 +55,19 @@ class LogInActivity : AppCompatActivity() {
         startActivity(userActivityIntent)
     }
 
-    private fun showProgressBar() { addProgressBar(supportFragmentManager, R.id.container_login) }
+    private fun addProgressBar() { addProgressBar(supportFragmentManager, R.id.container_login) }
 
-    private fun hideProgressBar() { removeProgressBar(supportFragmentManager) }
+    private fun removeProgressBar() { removeProgressBar(supportFragmentManager) }
+
+    private fun showToastFailure() {
+        shortToast(this@LogInActivity, getString(R.string.toast_auth_failed))
+    }
 
     @SuppressLint("SetTextI18n")
     private fun createRandomUser() {
         etEmail.setText("random@gmail.com")
         etPassword.setText("123456")
-        signUp()
+        processUser { signUp(mAuth, this@LogInActivity, email!!, password!!) }
     }
 
     companion object { private val TAG = "VN/" + LogInActivity::class.simpleName }