Question

This is the Skeleton of my current class

class JokeTemplates
{
      public function CheckTemplateCategory()
      {
      }

      public function SubmitUserTemplates()
      {
      }

      Public function ShowUserUploadedTemplates()
      {

      }

      public function ShowUSerFOrwardedTemplates()
      {
      }

      public function ShowAllTemplates()
      {
      }
}

In future i may have to design many such classes like LoveTemplates,FriendshipTemplates,BirthdayTemplates..etc
In which some of the functions like SubmitUserTemplates, ShowUserUploadedTemplates, ShowUSerFOrwardedTemplates may remain same While functionality of some of function Like ShowAllTemplates,CheckTemplateCategory etc. may change.

IF i create all the functions(copy-paste) in my all classes ,it will lead to huge code redundancy.
How should i design my code to reduce redundancy.

Answer 1

If i create all the functions(copy-paste) in my all classes ,it will lead to huge code redundancy. How should i design my code to reduce redundancy.

That’s what inheriance^­Docs is for:

You define the Templates type per it’s interface^­Docs:

Interface Templates
{
      public function CheckTemplateCategory();
      public function SubmitUserTemplates();
      Public function ShowUserUploadedTemplates();
      public function ShowUSerFOrwardedTemplates();
      public function ShowAllTemplates();
}

You create a base templates (I call it TemplatesBase) that is of type Templates per the implementation of the Interface. You can start to write actual code here into the function:

class TemplatesBase implements Templates

or alternatively with abstraction^­Docs:

abstract class TemplatesBase implements Templates
{
      public function CheckTemplateCategory()
      {
          ...
      }

      public function SubmitUserTemplates()
      {
      }

      Public function ShowUserUploadedTemplates()
      {
      }

      public function ShowUSerFOrwardedTemplates()
      {
      }

      public function ShowAllTemplates()
      {
      }
}

Finally you can extend from that class and only add the function you need:

class JokesTemplates extends TemplatesBase
{

      public function ShowUSerFOrwardedTemplates()
      {
          throw new TemplatesException('Jokes Templates don't support USerFOrwardedTemplates.');
      }
}