lib/khalti/verification.rb in khalti-0.1.5 vs lib/khalti/verification.rb in khalti-0.2.0

@@ -1,17 +1,39 @@
+# frozen_string_literal: true
+
 require 'uri'
 require 'net/http'
 require 'json'
 
 module Khalti
+  # Khalti verification API wrapper
   class Verification
-    API_URL = "https://khalti.com/api/payment/verify/"
+    API_URL = 'https://khalti.com/api/payment/verify/'
     SECRET_KEY = ENV['KHALTI_SECRET_KEY']
-    def self.verify(token, amount)
-      raise Errors::BlankError.new('Ensure token is not blank.') if token.nil? || token.strip.empty?
-      raise Errors::InvalidTokenError.new('Ensure token has at least 22 characters.') if token.strip.size < 22
-      raise Errors::InvalidAmountError.new('Ensure amount is greate than 0 paisa.') if Integer(amount) < 0
-      params = {'token': token, 'amount': Integer(amount)}
-      RequestHelper.post(API_URL, params)
+    class << self
+      def verify(token, amount)
+        validate_blank_token(token)
+        validate_token_length(token)
+        validate_ammount(amount)
+        params = { 'token': token, 'amount': amount.to_i }
+        RequestHelper.post(API_URL, params)
+      end
+
+      def validate_blank_token(val)
+        return unless val.nil? || val.strip.empty?
+        raise Errors::BlankError, 'Ensure token is not blank.'
+      end
+
+      def validate_token_length(val)
+        return if val.strip.size >= 22
+        raise Errors::InvalidTokenError, 'Ensure token has at least ' \
+          '22 characters.'
+      end
+
+      def validate_ammount(val)
+        return if Integer(val).positive?
+        raise Errors::InvalidAmountError, 'Ensure amount is ' \
+          'greater than 0 paisa.'
+      end
     end
   end
 end