Add verif on path name

app/src/main/java/com/example/busroute/ValidateMarker.kt

@@ -58,9 +58,16 @@ class ValidateMarker: AppCompatActivity() {
 
         val validateButton = findViewById<Button>(R.id.validate_form)
         validateButton.setOnClickListener{
+            val newName = findViewById<EditText>(R.id.route_name).text.toString()
+            if(newName.isBlank() or newName.isEmpty()){
+                val alert = AlertDialog.Builder(this).setTitle("Nom vide !")
+                    .setMessage("Le nom du trajet est vide !")
+                alert.show()
+                return@setOnClickListener
+            }
             val db = dbHelper.writableDatabase
             val newPath = ContentValues().apply {
-                put(PathContract.PathEntry.PATH_NAME, findViewById<EditText>(R.id.route_name).text.toString())
+                put(PathContract.PathEntry.PATH_NAME, newName)
             }
             val newPathRowId = db?.insert(PathContract.PathEntry.TABLE_NAME, null, newPath)
             if(newPathRowId?.toInt() != -1){