Moved vocabulary data extraction to util class

.idea/misc.xml

@@ -25,7 +25,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" 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/ui/activities/LogInActivity.kt

@@ -6,22 +6,20 @@ import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
 import android.util.Log
 
-import com.google.firebase.auth.FirebaseAuth
 import com.paktalin.vocabularynotebook.*
 import com.paktalin.vocabularynotebook.utils.fieldsNotEmpty
 import com.paktalin.vocabularynotebook.utils.shortToast
+import com.paktalin.vocabularynotebook.utils.signUp
+import com.paktalin.vocabularynotebook.utils.userLoggedIn
 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() }
@@ -29,7 +27,7 @@ class LogInActivity : AppCompatActivity() {
 
     override fun onStart() {
         super.onStart()
-        if (mAuth!!.currentUser != null) { startUserActivity() }
+        if (userLoggedIn()) { startUserActivity() }
     }
 
     fun login() {
@@ -38,10 +36,10 @@ class LogInActivity : AppCompatActivity() {
                     { removeProgressBar() },
                     { startUserActivity() },
                     { showToastFailure() },
-                    mAuth, email!!, password!!)
+                    email!!, password!!)
         } }
 
-    private fun signUp() { processUser { com.paktalin.vocabularynotebook.utils.signUp(mAuth, this, email!!, password!!) } }
+    private fun signUp() { processUser { signUp(this, email!!, password!!) } }
 
     private fun processUser(authAction: () -> Unit) {
         email = etEmail!!.text.toString()
@@ -67,15 +65,13 @@ class LogInActivity : AppCompatActivity() {
         com.paktalin.vocabularynotebook.utils.removeProgressBar(supportFragmentManager)
     }
 
-    private fun showToastFailure() {
-        shortToast(this@LogInActivity, getString(R.string.toast_auth_failed))
-    }
+    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")
-        processUser { com.paktalin.vocabularynotebook.utils.signUp(mAuth, this@LogInActivity, email!!, password!!) }
+        processUser { com.paktalin.vocabularynotebook.utils.signUp(this@LogInActivity, email!!, password!!) }
     }
 
     companion object { private val TAG = "VN/" + LogInActivity::class.simpleName }

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

@@ -5,7 +5,6 @@ import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import android.util.Log
 import com.google.firebase.auth.FirebaseAuth
-import com.google.firebase.firestore.DocumentReference
 
 import kotlinx.android.synthetic.main.activity_main.*
 import android.view.WindowManager
@@ -14,13 +13,12 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.inputmethod.InputMethodManager
-import com.paktalin.vocabularynotebook.appsetup.ConfiguredFirestore
 import kotlinx.android.synthetic.main.fragment_vocabulary.*
 import android.support.v7.widget.SearchView
 import com.paktalin.vocabularynotebook.*
-import com.paktalin.vocabularynotebook.firestoreitems.Vocabulary.Companion.VOCABULARIES
 import com.paktalin.vocabularynotebook.ui.fragments.VocabularyFragment
 import com.paktalin.vocabularynotebook.utils.addFragment
+import com.paktalin.vocabularynotebook.utils.extractVocabularyData
 import com.paktalin.vocabularynotebook.utils.shortToast
 
 class MainActivity : AppCompatActivity() {
@@ -59,36 +57,28 @@ class MainActivity : AppCompatActivity() {
     private fun setUpNavigationView() {
         navigationView.setNavigationItemSelectedListener { menuItem ->
             menuItem.isChecked = true
-            if(menuItem.itemId == R.id.logOut) { logOut() }
+            if (menuItem.itemId == R.id.logOut) {
+                logOut()
+            }
             drawerLayout!!.closeDrawers()
             true
         }
     }
 
     private fun extractVocabularyData() {
-        val userId = FirebaseAuth.getInstance()!!.currentUser!!.uid
-        val db = ConfiguredFirestore.instance
-
-        val userDocument = db.collection("users").document(userId)
         addProgressBar()
-        userDocument.get()
-                .addOnSuccessListener { task ->
-                    removeProgressBar()
-                    //todo move Firestore logic and collections names to a separate class
-                    if (task.get(VOCABULARIES) != null) {
-                        val vocabularies: List<DocumentReference> = task.get(VOCABULARIES) as List<DocumentReference>
-                        val vocabulary = db.collection(VOCABULARIES).document(vocabularies[0].id)
-                        vocabularyId = vocabulary.id
-
-                        // start VocabularyFragment
+        extractVocabularyData(
+                { id-> addVocabularyFragment(id) },
+                { showToastNoWords() },
+                { removeProgressBar() })
+    }
+
+    private fun addVocabularyFragment(vocabularyId: String) {
+        this.vocabularyId = vocabularyId
         vocabularyFragment = VocabularyFragment()
         val arguments = Bundle()
         arguments.putString("vocabularyId", vocabularyId)
         addFragment(supportFragmentManager, vocabularyFragment, R.id.container_vocabulary, arguments)
-                    } else {
-                        Log.w(TAG, "There's no collection \"vocabularies\"")
-                        showToastNoWords() }
-        }
     }
 
     private fun hideKeyboard() {
@@ -98,7 +88,9 @@ class MainActivity : AppCompatActivity() {
     fun hideKeyboardNotFromActivity(activity: Activity) {
         val imm = activity.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
         var view = activity.currentFocus
-        if (view == null) { view = View(activity) }
+        if (view == null) {
+            view = View(activity)
+        }
         imm.hideSoftInputFromWindow(view.windowToken, 0)
     }
 
@@ -119,5 +111,7 @@ class MainActivity : AppCompatActivity() {
         hideKeyboard()
     }
 
-    companion object { private val TAG = "VN/" + MainActivity::class.simpleName }
+    companion object {
+        private val TAG = "VN/" + MainActivity::class.simpleName
+    }
 }
\ No newline at end of file

app/src/main/java/com/paktalin/vocabularynotebook/utils/FirestoreManager.kt

 package com.paktalin.vocabularynotebook.utils
 
+import android.util.Log
+import com.google.firebase.auth.FirebaseAuth
+import com.google.firebase.auth.FirebaseUser
+import com.google.firebase.firestore.DocumentReference
+import com.google.firebase.firestore.DocumentSnapshot
+import com.google.firebase.firestore.FirebaseFirestore
+import com.paktalin.vocabularynotebook.appsetup.ConfiguredFirestore
+import com.paktalin.vocabularynotebook.firestoreitems.UserPojo
+import com.paktalin.vocabularynotebook.firestoreitems.Vocabulary
+import com.paktalin.vocabularynotebook.ui.activities.LogInActivity
+import java.util.*
+
+private const val USERS = "users"
+private const val TAG = "VN/FirestoreManager"
+
+fun extractVocabularyData(onSuccess: (vocabularyId: String) -> Unit,
+                                  showToastNoWords: () -> Unit, removeProgressBar: () -> Unit) {
+    val userId = FirebaseAuth.getInstance()!!.currentUser!!.uid
+    val db = ConfiguredFirestore.instance
+
+    val userDocument = db.collection(USERS).document(userId)
+    userDocument.get()
+            .addOnSuccessListener { task ->
+                removeProgressBar()
+                if (task.get(Vocabulary.VOCABULARIES) != null) {
+                    val vocabularyId = retrieveVocabularyID(task, db)
+                    onSuccess(vocabularyId)
+                } else {
+                    Log.w(TAG, "There's no collection \"vocabularies\"")
+                    showToastNoWords() } }
+}
+
+private fun retrieveVocabularyID(task: DocumentSnapshot, db: FirebaseFirestore): String {
+    val vocabularies: List<DocumentReference> = task.get(Vocabulary.VOCABULARIES) as List<DocumentReference>
+    val vocabulary = db.collection(Vocabulary.VOCABULARIES).document(vocabularies[0].id)
+    return vocabulary.id
+}
+
+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)
+
+    db.collection(Vocabulary.VOCABULARIES).add(Vocabulary.Pojo(null))
+            .addOnSuccessListener { firstVocabularyRef ->
+                Log.d(TAG, "VocabularyPojo successfully created: " + firstVocabularyRef.path)
+                user.vocabularies = Collections.singletonList(firstVocabularyRef)
+
+                db.collection("users").document(newUser.uid).set(user)
+                        .addOnCompleteListener { task ->
+                            if (task.isSuccessful) {
+                                Log.i(TAG, "Successfully added user to the collection")
+                                logInActivity.startUserActivity()
+                            } else Log.w(TAG, "addUser:failure", task.exception)
+                        }
+            }
+            .addOnFailureListener {
+                Log.w(TAG, "Couldn't add user to the database", it.cause)
+                deleteUser(newUser)
+            }
+}
+

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

@@ -11,39 +11,16 @@ import com.paktalin.vocabularynotebook.firestoreitems.Vocabulary.Companion.VOCAB
 import java.util.*
 
 private const val TAG = "VN/UserManager"
+private var mAuth: FirebaseAuth? = FirebaseAuth.getInstance()
 
-private fun deleteUser(user: FirebaseUser) {
+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) {
-    //todo add condition to writing to the db in Firebase Console (request.auth.uid)
-    val db = ConfiguredFirestore.instance
-    val user = UserPojo(newUser.email)
-
-    db.collection(VOCABULARIES).add(Vocabulary.Pojo(null))
-            .addOnSuccessListener { firstVocabularyRef ->
-                Log.d(TAG, "VocabularyPojo successfully created: " + firstVocabularyRef.path)
-                user.vocabularies = Collections.singletonList(firstVocabularyRef)
-
-                db.collection("users").document(newUser.uid).set(user)
-                        .addOnCompleteListener { task ->
-                            if (task.isSuccessful) {
-                                Log.i(TAG, "Successfully added user to the collection")
-                                logInActivity.startUserActivity()
-                            } else Log.w(TAG, "addUser:failure", task.exception)
-                        }
-            }
-            .addOnFailureListener {
-                Log.w(TAG, "Couldn't add user to the database", it.cause)
-                deleteUser(newUser)
-            }
-}
-
 fun login(onComplete: () -> Unit, onSuccess: () -> Unit, onFailure: () -> Unit,
-          mAuth: FirebaseAuth?, email: String, password: String) {
+          email: String, password: String) {
     mAuth!!.signInWithEmailAndPassword(email, password)
             .addOnCompleteListener { onComplete() }
             .addOnSuccessListener {
@@ -56,16 +33,19 @@ fun login(onComplete: () -> Unit, onSuccess: () -> Unit, onFailure: () -> Unit,
             }
 }
 
-fun signUp(mAuth: FirebaseAuth?, activity: LogInActivity, email: String, password: String) {
+fun signUp(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)
+                addNewUserToDb(mAuth!!.currentUser!!, activity)
                 activity.login()
             }
             .addOnFailureListener {
                 Log.d(TAG, "createUserWithEmail:failure", it.fillInStackTrace())
                 shortToast(activity, it.message!!)
-            }
+            } }
+
+fun userLoggedIn(): Boolean {
+    return mAuth!!.currentUser != null
 }
\ No newline at end of file