Add new classes for calculator

src/Server/src/main/java/greenify/server/InputValidator.java

@@ -0,0 +1,87 @@
+package greenify.server;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class InputValidator {
+
+    private static final List<InputItem> inputItems = Arrays.asList(
+        new InputItem("input_size", false, "1"),
+        new InputItem("input_income", false, "40000"),
+        new InputItem("transportation_num_vehicles", false, "1" ),
+        new InputItem("transportation_miles1", false, "16100", false),
+        new InputItem("transportation_fuels1", false, "2" , false),
+        new InputItem("transportation_mpg1", false, null, false ),
+        new InputItem("transportation_miles2", false, "13200", false ),
+        new InputItem("transportation_fuels2", false, "0" , false),
+        new InputItem("transportation_mpg2", false, "22" ,false),
+        new InputItem("transportation_publicTrans", false, "436" ),
+        new InputItem("transportation_air", false, "3900" ),
+        new InputItem("housing_electricity_kwh_year", false, "12632" ),
+        new InputItem("housing_cleanPercent", false, "0" ),
+        new InputItem("housing_naturalGas_therms_year", false, "472" ),
+        new InputItem("housing_heatingOil_gallons_year", false, "73" ),
+        new InputItem("housing_square_feet", false, "1850" ),
+        new InputItem("housing_water_sewage", false, "100" ),
+        new InputItem("food_meat_fish_eggs", true, "2.4" ),
+        new InputItem("food_grains", true, "4.1" ),
+        new InputItem("food_dairy", true, "2.2" ),
+        new InputItem("food_fruit_vegetables", true, "3.5" ),
+        new InputItem("food_snacks_drinks", true, "3.4" ),
+        new InputItem("shopping_goods", false, "1310" ),
+        new InputItem("shopping_services", false, "2413" )
+    );
+
+    /**
+     * The method checks that the id is valid or not.
+     * @param inputName the name of input
+     * @return true or false
+     */
+    public static Boolean isValidItem(String inputName) {
+        return inputItems.stream().filter(i -> i.getName() == inputName).findAny().isPresent();
+    }
+
+    /**
+     * The method checks that the item value is valid or not.
+     * @param inputName the name of input
+     * @param value the value of item
+     * @return true or false
+     */
+    public static boolean isValidItemValue(String inputName, String value) {
+        InputItem item = null;
+        for (int i = 0; i < inputItems.size(); i++) {
+            if (inputItems.get(i).getName() == inputName) {
+                item = inputItems.get(i);
+            }
+        }
+        if (item.getFloat()) {
+            try {
+                Float number = Float.parseFloat(value);
+            } catch (NumberFormatException | NullPointerException nfe) {
+                return false;
+            }
+            return true;
+        } else {
+            try {
+                Integer number = Integer.parseInt(value);
+            } catch (NumberFormatException | NullPointerException nfe) {
+                return false;
+            }
+            return true;
+        }
+    }
+
+    /**
+     * getter for default values.
+     * @return the map of default values
+     */
+    public static Map<String, String> getDefaultValues() {
+        Map<String,String> map = new HashMap<String, String>(){};
+        for (int i = 0; i < inputItems.size(); i++) {
+            map.put(inputItems.get(i).getName(), inputItems.get(i).getDefaultValue());
+        }
+        return map;
+    }
+}