Add Ktlint to enforce code styling

app/src/androidTest/java/io/github/rosariopfernandes/firextensiossample/ExampleInstrumentedTest.kt

@@ -2,12 +2,11 @@ package io.github.rosariopfernandes.firextensiossample
 
 import androidx.test.InstrumentationRegistry
 import androidx.test.runner.AndroidJUnit4
+import org.junit.Assert.assertEquals
 
 import org.junit.Test
 import org.junit.runner.RunWith
 
-import org.junit.Assert.*
-
 /**
  * Instrumented test, which will execute on an Android device.
  *

app/src/main/java/io/github/rosariopfernandes/firextensiossample/Todo.kt

@@ -1,8 +1,8 @@
 package io.github.rosariopfernandes.firextensiossample
 
 data class Todo(
-        var title: String,
-        var text: String
+    var title: String,
+    var text: String
 ) {
     constructor(): this("", "")
 }

app/src/main/java/io/github/rosariopfernandes/firextensiossample/TodoAdapter.kt

@@ -24,8 +24,8 @@ class TodoAdapter(var todos: ArrayList<Todo>?) : RecyclerView.Adapter<TodoAdapte
     }
 
     inner class TodoViewHolder(v: View) : RecyclerView.ViewHolder(v) {
-        var tvTitle:TextView? = null
-        var tvText:TextView? = null
+        var tvTitle: TextView? = null
+        var tvText: TextView? = null
         init {
             tvTitle = v.findViewById(R.id.tvTitle)
             tvText = v.findViewById(R.id.tvText)

app/src/test/java/io/github/rosariopfernandes/firextensiossample/ExampleUnitTest.kt

@@ -1,9 +1,8 @@
 package io.github.rosariopfernandes.firextensiossample
 
+import org.junit.Assert.assertEquals
 import org.junit.Test
 
-import org.junit.Assert.*
-
 /**
  * Example local unit test, which will execute on the development machine (host).
  *

database/src/main/java/io/github/rosariopfernandes/firextensions/database/DatabaseReference.kt

@@ -42,8 +42,8 @@ fun DatabaseReference.push(obj: Any): String {
  * of the lambda function.
  */
 inline fun DatabaseReference.push(
-        obj: Any,
-        crossinline action: (key: String?) -> Unit
+    obj: Any,
+    crossinline action: (key: String?) -> Unit
 ) {
     val key = push().key
     if (key == null) {

database/src/main/java/io/github/rosariopfernandes/firextensions/database/FirebaseDatabase.kt

@@ -38,7 +38,7 @@ import com.google.firebase.database.ValueEventListener
 inline fun FirebaseDatabase.checkConnectionState(
     crossinline action: (isConnected: Boolean) -> Unit
 ) {
-    getReference(".info/connected").addValueEventListener(object: ValueEventListener {
+    getReference(".info/connected").addValueEventListener(object : ValueEventListener {
         override fun onDataChange(dataSnapshot: DataSnapshot) {
             val isConnected = dataSnapshot.getValue(Boolean::class.java)
             action(isConnected ?: false)

database/src/main/java/io/github/rosariopfernandes/firextensions/database/Query.kt

@@ -36,9 +36,9 @@ import com.google.firebase.database.ValueEventListener
 inline fun <reified T> DatabaseReference.observe(
     crossinline action: (data: T?, error: DatabaseError?) -> Unit
 ) {
-    addValueEventListener(object: ValueEventListener {
+    addValueEventListener(object : ValueEventListener {
         override fun onDataChange(dataSnapshot: DataSnapshot) {
-            if(T::class.java == DataSnapshot::class.java) {
+            if (T::class.java == DataSnapshot::class.java) {
                 action(dataSnapshot as T, null)
             } else {
                 action(dataSnapshot.getValue(T::class.java), null)
@@ -58,9 +58,9 @@ inline fun <reified T> DatabaseReference.observe(
 inline fun <reified T> DatabaseReference.observeSingleEvent(
     crossinline action: (data: T?, error: DatabaseError?) -> Unit
 ) {
-    addListenerForSingleValueEvent(object: ValueEventListener {
+    addListenerForSingleValueEvent(object : ValueEventListener {
         override fun onDataChange(dataSnapshot: DataSnapshot) {
-            if(T::class.java == DataSnapshot::class.java) {
+            if (T::class.java == DataSnapshot::class.java) {
                 action(dataSnapshot as T, null)
             } else {
                 action(dataSnapshot.getValue(T::class.java), null)
@@ -80,7 +80,7 @@ inline fun <reified T> DatabaseReference.observeSingleEvent(
 inline fun <reified T> DatabaseReference.observeChildren(
     crossinline action: (data: ArrayList<T>?, error: DatabaseError?) -> Unit
 ) {
-    addValueEventListener(object: ValueEventListener {
+    addValueEventListener(object : ValueEventListener {
         override fun onDataChange(dataSnapshot: DataSnapshot) {
             val data = ArrayList<T>()
             for (snapshot in dataSnapshot.children) {
@@ -106,7 +106,7 @@ inline fun <reified T> DatabaseReference.observeChildren(
 inline fun <reified T> DatabaseReference.observeSingleChildrenEvent(
     crossinline action: (data: ArrayList<T>?, error: DatabaseError?) -> Unit
 ) {
-    addListenerForSingleValueEvent(object: ValueEventListener {
+    addListenerForSingleValueEvent(object : ValueEventListener {
         override fun onDataChange(dataSnapshot: DataSnapshot) {
             val data = ArrayList<T>()
             for (snapshot in dataSnapshot.children) {

firestore/src/main/java/io/github/rosariopfernandes/firextensions/firestore/DocumentReference.kt

@@ -62,7 +62,6 @@ inline fun <reified T> DocumentReference.getDocument(
             } else {
                 action(null, NullPointerException("Document not found"))
             }
-
         } else {
             action(null, task.exception)
         }