Clean step is DEAD

Server/src/main/kotlin/api/ApiExtensions.kt

@@ -21,4 +21,36 @@ fun Collection<IntArray>.toIntArray() : IntArray {
     val list = ArrayList<Int>()
     this.forEach { arr -> arr.forEach { list.add(it) } }
     return list.toIntArray()
+}
+
+inline fun <reified T> Collection<T>.isLast(element: T) : Boolean {
+    return this.indexOf(element) == this.size - 1
+}
+
+inline fun <reified T> Collection<T>.getNext(element: T) : T {
+    val idx = this.indexOf(element)
+    return if (idx < this.size - 1)
+        this.elementAt(idx + 1)
+    else
+        element
+}
+
+inline fun <reified T> Collection<T>.isNextLast(element: T) : Boolean {
+    return this.isLast(this.getNext(element))
+}
+
+fun IntArray.isLast(element: Int) : Boolean {
+    return this.indexOf(element) == this.size - 1
+}
+
+fun IntArray.getNext(element: Int) : Int {
+    val idx = this.indexOf(element)
+    return if (idx < this.size - 1)
+        this.elementAt(idx + 1)
+    else
+        element
+}
+
+fun IntArray.isNextLast(element: Int) : Boolean {
+    return this.isLast(this.getNext(element))
 }