45:["$","p",null,{"className":"my-4 leading-7 text-zinc-700 dark:text-zinc-300","children":[["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"Hive"}]," is a lightweight, fast key-value database written in pure Dart. It is used to store data locally on the device. We will use ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"Hive"}]," to store the posts locally on the device."]}] 46:["$","p",null,{"className":"my-4 leading-7 text-zinc-700 dark:text-zinc-300","children":["The ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"post_interface.dart"}]," file contains the ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"PostsInterface"}]," interface which is the interface for the posts feature. The ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"PostsInterface"}]," interface contains the ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"getPosts"}]," method which is used to get the posts from the data source and other methods used by the application."]}] 47:["$","pre",null,{"className":"my-6 overflow-x-auto rounded-lg bg-zinc-950 p-4 text-sm leading-relaxed dark:bg-zinc-900","children":["$","code",null,{"className":"language-dart","children":"abstract class PostsInterface {\n Future> getPosts();\n Future> generateInitPosts();\n Future> likePostPressed({required int postId});\n Future> dislikePostPressed({required int postId});\n Future> bookmarkPostPressed({required int postId});\n Future> createPost({\n required String content,\n File? photo,\n });\n}\n"}]}] 48:["$","p",null,{"className":"my-4 leading-7 text-zinc-700 dark:text-zinc-300","children":"In the above code block, we have an abstract class that acts as an interface for the posts feature. We have 6 methods defined in the interface, each of which is responsible for a different task."}] 49:["$","p",null,{"className":"my-4 leading-7 text-zinc-700 dark:text-zinc-300","children":["Dart doesn't have the ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"interface"}]," keyword like some other languages, but it does have ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"abstract"}]," classes that can be used to define a contract that other classes can implement. This is done by defining an abstract class that defines the required methods and properties, and then creating a concrete class that implements those methods and properties, as we have done above."]}] 4a:["$","p",null,{"className":"my-4 leading-7 text-zinc-700 dark:text-zinc-300","children":["In the ",["$","strong",null,{"className":"font-semibold text-zinc-900 dark:text-zinc-100","children":"Infrastructure"}]," layer, we will create a concrete class that implements the ",["$","code",null,{"className":"rounded bg-zinc-100 px-1.5 py-0.5 text-sm font-medium text-zinc-800 dark:bg-zinc-800 dark:text-zinc-200","children":"PostsInterface"}]," interface and see how it is used in the application."]}]