rubocop update and resolutions

.rubocop.yml

@@ -41,7 +41,6 @@ Style/StringLiterals:
 Metrics/AbcSize:
   Exclude:
     - db/migrate/**/*
-    - app/services/crypt_serializer.rb
 
 Metrics/LineLength:
   Max: 110
@@ -54,3 +53,6 @@ Metrics/LineLength:
 Metrics/MethodLength:
   Exclude:
     - db/migrate/*
+
+Rails:
+  Enabled: true

.ruby_version

@@ -0,0 +1 @@
+2.3.1

Guardfile

@@ -32,5 +32,6 @@ end
 guard :rubocop do
   watch(/.+\.rb$/)
   watch(/Rakefile/)
+  watch(/.rubocop.yml/)
   watch(%r{(?:.+/)?\.rubocop\.yml$}) { |m| File.dirname(m[0]) }
 end

app/services/crypt_serializer.rb

@@ -26,15 +26,25 @@ class CryptSerializer
       raise "Attribute was supposed to be a `String`, but was instead a `#{value.class}`"
     end
 
-    cipher.encrypt
+    build_cipher value
-    parts = [cipher.random_key, cipher.random_iv, cipher.update(value) + cipher.final]
-    Base64.urlsafe_encode64 Marshal.dump(parts)
   end
 
   def decrypt(value)
     return value if value.nil?
 
     parts = Marshal.load Base64.urlsafe_decode64(value)
+    decode_cipher parts
+  end
+
+  private
+
+    def build_cipher value
+      cipher.encrypt
+      parts = [cipher.random_key, cipher.random_iv, cipher.update(value) + cipher.final]
+      Base64.urlsafe_encode64 Marshal.dump(parts)
+    end
+
+    def decode_cipher parts
       cipher.decrypt
       cipher.key = parts[0]
       cipher.iv = parts[1]

config/database.yml

@@ -16,7 +16,7 @@ default: &default
   host: <%= ENV['mysql_host'] %>
   username: <%= ENV['mysql_usr'] %>
   password: <%= ENV['mysql_pwd'] %>
-  socket: /var/run/mysqld/mysqld.sock
+  # socket: /var/run/mysqld/mysqld.sock
 
 development:
   <<: *default