New words are added to the database

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

+package com.paktalin.vocabularynotebook
+
+import android.content.Context
+import android.text.TextUtils
+import android.widget.Toast
+
+class Utils {
+    companion object {
+        fun fieldsNotEmpty(text1: String, text2: String, toastMessage: String, context: Context): Boolean {
+            if (TextUtils.isEmpty(text1) || TextUtils.isEmpty(text2)) {
+                Toast.makeText(context, toastMessage, Toast.LENGTH_SHORT).show()
+                return false
+            }
+            return true
+        }
+    }
+}
\ No newline at end of file

app/src/main/java/com/paktalin/vocabularynotebook/WordPojo.java

+package com.paktalin.vocabularynotebook;
+
+public class WordPojo {
+
+    private String word, translation;
+
+    public WordPojo(String word, String translation) {
+        this.word = word;
+        this.translation = translation;
+    }
+
+    public String getWord() {
+        return word;
+    }
+
+    public void setWord(String word) {
+        this.word = word;
+    }
+
+    public String getTranslation() {
+        return translation;
+    }
+
+    public void setTranslation(String translation) {
+        this.translation = translation;
+    }
+}

app/src/main/java/com/paktalin/vocabularynotebook/activities/AddWordActivity.kt

@@ -2,13 +2,50 @@ package com.paktalin.vocabularynotebook.activities
 
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import android.util.Log
+import android.widget.Toast
+import com.google.firebase.firestore.FirebaseFirestore
 
 import com.paktalin.vocabularynotebook.R
+import com.paktalin.vocabularynotebook.Utils
+import com.paktalin.vocabularynotebook.WordPojo
+import kotlinx.android.synthetic.main.activity_add_word.*
 
 class AddWordActivity : AppCompatActivity() {
+    companion object {
+        private val TAG = "VN/" + AddWordActivity::class.simpleName
+        private const val VOCABULARIES = "vocabularies"
+        private const val WORDS = "words"
+    }
+
+    private lateinit var vocabularyId: String
+    private val db = FirebaseFirestore.getInstance()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_add_word)
+        vocabularyId = intent.getStringExtra("vocabularyId")
+        btnSubmitNewWord.setOnClickListener( { addWordToDb() })
+    }
+
+    private fun addWordToDb() {
+        val word = etWord.text.toString()
+        val translation = etTranslation.text.toString()
+        if (Utils.fieldsNotEmpty(word, translation, "Please, enter word and translation", this)) {
+            db.collection(VOCABULARIES).document(vocabularyId)
+                    .collection(WORDS).add(WordPojo(word, translation)).addOnSuccessListener {
+                        Log.i(TAG, "Successfully added a new word $word")
+                        clearFields()
+                    }
+                    .addOnFailureListener {
+                        Log.w(TAG, "addNewWordToDb:failure", it.fillInStackTrace())
+                        Toast.makeText(this, "Couldn't add the word", Toast.LENGTH_SHORT).show()
+                    }
+        }
+    }
+
+    private fun clearFields() {
+        etWord.text.clear()
+        etTranslation.text.clear()
     }
 }

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

@@ -4,7 +4,6 @@ import android.annotation.SuppressLint
 import android.content.Intent
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
-import android.text.TextUtils
 import android.util.Log
 import android.widget.Toast
 
@@ -12,9 +11,9 @@ import com.google.firebase.auth.FirebaseAuth
 import kotlinx.android.synthetic.main.activity_log_in.*
 import com.paktalin.vocabularynotebook.R
 import com.paktalin.vocabularynotebook.UserManager
+import com.paktalin.vocabularynotebook.Utils
 
 class LogInActivity : AppCompatActivity() {
-
     private var mAuth: FirebaseAuth? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -39,7 +38,7 @@ class LogInActivity : AppCompatActivity() {
         val email = etEmail!!.text.toString()
         val password = etPassword!!.text.toString()
 
-        if (fieldsNotEmpty(email, password)) {
+        if (Utils.fieldsNotEmpty(email, password, "Please, enter email and password", this)) {
             mAuth!!.signInWithEmailAndPassword(email, password)
                     .addOnCompleteListener { task ->
                         if (task.isSuccessful) {
@@ -59,7 +58,7 @@ class LogInActivity : AppCompatActivity() {
         val email = etEmail!!.text.toString()
         val password = etPassword!!.text.toString()
 
-        if (fieldsNotEmpty(email, password)) {
+        if (Utils.fieldsNotEmpty(email, password, "Please, enter email and password", this)) {
             //todo check if the password is good
             // todo verify email
             mAuth!!.createUserWithEmailAndPassword(email, password)
@@ -80,14 +79,6 @@ class LogInActivity : AppCompatActivity() {
         startActivity(userActivityIntent)
     }
 
-    private fun fieldsNotEmpty(email: String, password: String): Boolean {
-        if (TextUtils.isEmpty(email) || TextUtils.isEmpty(password)) {
-            Toast.makeText(this@LogInActivity, "Please, enter email and password", Toast.LENGTH_SHORT).show()
-            return false
-        }
-        return true
-    }
-
     @SuppressLint("SetTextI18n")
     private fun createRandomUser() {
         etEmail.setText("random@gmail.com")

app/src/main/java/com/paktalin/vocabularynotebook/activities/VocabularyFragment.kt

@@ -19,6 +19,7 @@ class VocabularyFragment : Fragment() {
 
     private lateinit var userDocument: DocumentReference
     private val db = FirebaseFirestore.getInstance()
+    private lateinit var vocabularyId: String
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_vocabulary, container, false)
@@ -42,21 +43,26 @@ class VocabularyFragment : Fragment() {
         userDocument = db.collection("users").document(userId)
     }
 
+    private fun setVocabularyId(task: DocumentSnapshot) {
+        //todo if only one vocabulary exists, open it
+        val vocabularies: List<DocumentReference> = task.get("vocabularies") as List<DocumentReference>
+        vocabularyId = vocabularies[0].id
+    }
+
     @SuppressLint("SetTextI18n")
     private fun printUserData() {
         userDocument.get().addOnSuccessListener { task ->
             val email = task.get("email").toString()
             tvUserData.text = email
 
-            retrieveVocabulary(task)
+            setVocabularyId(task)
+            retrieveVocabularyData()
         }
     }
 
-    private fun retrieveVocabulary(task: DocumentSnapshot) {
+    private fun retrieveVocabularyData() {
         //todo if only one vocabulary exists, open it
-        val vocabularies: List<DocumentReference> = task.get("vocabularies") as List<DocumentReference>
-        val firstVocab = vocabularies[0].id
-        db.collection("vocabularies").document(firstVocab).get().addOnSuccessListener { task ->
+        db.collection("vocabularies").document(vocabularyId).get().addOnSuccessListener { task ->
             val vocabTitle = task.get("title").toString()
             tvUserData.append("\n\nvocabularies:\n$vocabTitle")
 
@@ -65,10 +71,9 @@ class VocabularyFragment : Fragment() {
 
     private fun addWord() {
         val addWordIntent = Intent(activity, AddWordActivity::class.java)
+        addWordIntent.putExtra("vocabularyId", vocabularyId)
         startActivity(addWordIntent)
     }
 
-    companion object {
-        private val TAG = "VN/" + VocabularyFragment::class.simpleName
-    }
-}
+    companion object { private val TAG = "VN/" + VocabularyFragment::class.simpleName }
+}
\ No newline at end of file

app/src/main/res/layout/activity_add_word.xml

@@ -23,13 +23,13 @@
         android:layout_marginTop="8dp"
         android:ems="10"
         android:hint="Translation"
-        app:layout_constraintBottom_toTopOf="@+id/btnSubmit"
+        app:layout_constraintBottom_toTopOf="@+id/btnSubmitNewWord"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/etWord" />
 
     <Button
-        android:id="@+id/btnSubmit"
+        android:id="@+id/btnSubmitNewWord"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginTop="16dp"