(MVI) Model View Intent

Improvement from MVI towards a better Architecture

• To overcome the drawbacks of MVC controller overloading with the business logic. Modifications were done to segregate it to a better representation of architecture called Model-View-Presenter.
• It is a relatively new but popular approach to android application architecture.
• MVP and MVVM are a little bit similar to MVC to MVI.
• MVP and MVVM have presenter and view-model respectively to that of controller for MVC.

Contents
MVI specific concepts
How the concept of MVI came into existence
How MVI works
Overview representation of mvi

MVI specific concepts

• Uni-directional data flow.
• Immutable state.
• User as a function.
• Its way of simplifying the flow of information which leads to a comprehensive and systematic approach to architecture.

How the concept of MVI came into existence

• Many of the advancements in recent times comes from the web-development world.
• Some namely react, redux, flux, use event-driven and functional way of solving things.
• They give a unique perspective on how to manage mutable state.
• Such representation fits into mobile development applications.
• MVI is closely associated with cycle.js from the web development world.

How MVI works

Most important part of the Architecture - User

• Much of the code you write in web development is user focused instead of process intensive.
• Architecture in android usually focus on the process instead of user. The code gives an interface to accept input and send input.
• Place of the user in mvvm or mvp is not transparent. Usually, the user is the kind of view in these patterns.

In MVI user takes a central role in expressing their intents(intention).

Overview representation of MVI

* Application starts up and user starts interacting with it. * We call user interation intents meaning users intents on something to occur based on how they interact with the application. They might `type a text` or `click a button`. * Our software does something interesting using the intents(intention) of the user and models the data and the output is sent back to the user. * Thus there are **`intents as input**` and **`results as output`**.