VIPER Architecture (Rambler Team)

Overview

VIPER enforces Single Responsibility Principle through five protocol-based components: View, Interactor, Presenter, Entity, Router. Created and documented by Rambler&Co iOS Team.

Core Principle: Entities never reach the Presentation layer. Simple data structures transfer between Interactor and Presenter, preventing business logic pollution in UI.

When to Use VIPER

digraph viper_decision {
    "Complex app?" [shape=diamond];
    "Multiple features?" [shape=diamond];
    "Long-term project?" [shape=diamond];
    "Team size > 2?" [shape=diamond];
    "High testability need?" [shape=diamond];
    "Use VIPER" [shape=box, style=filled, fillcolor=lightgreen];
    "Use MVC/MVVM" [shape=box, style=filled, fillcolor=lightcoral];