lib/train/tax/calculator.rb in train-tax-calculator-1.0.1 vs lib/train/tax/calculator.rb in train-tax-calculator-1.1.0

@@ -5,27 +5,72 @@
 
 module Train
   module Tax
     module Calculator
 
-      def self.for_philhealth(salary_base)
-        Philhealth.compute(salary_base)
-      end
+      class << self
 
-      def self.for_pagibig(salary_base)
-        Pagibig.compute(salary_base)
-      end
+        def withholding_tax(basic_salary)
+          deductions = for_philhealth(basic_salary) + for_pagibig(basic_salary) + for_sss_es(basic_salary)
+          taxable_income = basic_salary - deductions
 
-      def self.for_sss(salary_base)
-        Sss.compute(salary_base)
-      end
+          compute_withholding_for(taxable_income).round(2)
+        end
 
-      def self.for_sss_es(salary_base)
-        Sss.compute_employee_share(salary_base)
+        def net_income(basic_salary)
+          basic_salary - withholding_tax(basic_salary)
+        end
+
+        def for_philhealth(basic_salary)
+          Philhealth.compute(basic_salary)
+        end
+
+        def for_pagibig(basic_salary)
+          Pagibig.compute(basic_salary)
+        end
+
+        def for_sss(basic_salary)
+          Sss.compute(basic_salary)
+        end
+
+        def for_sss_es(basic_salary)
+          Sss.compute_employee_share(basic_salary)
+        end
+
+        def for_sss_er(basic_salary)
+          Sss.compute_employer_share(basic_salary)
+        end
+
       end
 
-      def self.for_sss_er(salary_base)
-        Sss.compute_employer_share(salary_base)
+      private
+
+      def self.compute_withholding_for(income)
+        if income >= 666_667.00
+
+          200_833.33 + ((income - 666_667.00) * 0.35)
+
+        elsif income >= 166_667.00
+
+          40_833.33 + ((income - 166_667.00) * 0.32)
+
+        elsif income >= 66_667.00
+
+          10_833.33 + ((income - 66_667.00) * 0.30)
+
+        elsif income >= 33_333.00
+
+          2_500.00 + ((income - 33_333.00) * 0.25)
+
+        elsif income >= 20_833.00
+
+          0.00 + ((income - 20_833.00) * 0.20)
+
+        else
+
+          0.00
+
+        end
       end
 
     end
   end
 end