NYTopStories is an iOS app which list down articles from your favorite section.
Download and unzip. In your terminal move to app folder. Run the commond (Can be skipped as code contains installed pod and api key)
pod installOnce completed, run the command
open NYTopStories.xcworkspaceto open NYTopStories in Xcode
ViewModel.swift is the model for the listing and detailing of articles. This also manages all the network call and structuring of data completely seperate from any View or Controller. This is not bound to any View or Controller. Hence it very easy to seperate model and associated logic from View and Controller. It also helps in maintaining code and write simple test cases. All the model object used are struct just to have each view or controller its own copy.
ListViewController.swift and DetailViewController.swift are two ViewController used here. ListViewController uses ViewModel as its model and DetailViewController uses Results struct as its model.
Architecture of ViewModel.swift, ListViewController.swift and its storyboard is such that this pattern can exist throughout without any overlapping. If required whole patten can be moved, shifted or copied without much code changes and associated regression in code. Associated test case also will not require much changes. Hence it offers great flexibilty. This pattern is such that all the feature can broken down to this type of pattern easily. In a feature or module, all the pattern will be mostly independent of each other that offers great depth of scalability.
Database.swift is a single file where all the database related classes exists. SQLiteDatabase is main class that handles all the database operations.
It has a class method open(path dbPath: String) throws -> SQLiteDatabase that return its instance if database opens successfully. Other public instance method save(response aResponse: ApiResponse) throws is used to persist table data(Currenlty only decoded response). Other instance method func query() throws -> ApiResponse retrieve the cached response. A protocol SQLTable is also defined that all the table in the database must adhere to.
RequestManager.swift is a single class that can be expanded to handle all network related call.
URLSessionMock.swift has all the ingredient to mock a network call without hitting actual network.
This file can be considered be a common place of the global variable and functions.
Current Database.swift, RequestManager.swift, URLSessionMock.swift etc can be used as stubs code to quickely start any project.