51 lines
1.3 KiB
Kotlin
51 lines
1.3 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.mvi
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import io.reactivex.ObservableTransformer
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import io.reactivex.subjects.Subject
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import mozilla.components.support.base.log.logger.Logger
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import org.mozilla.fenix.BuildConfig
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/**
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* An action is a command or intent the user performed
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*/
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interface Action
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/**
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* A Change is a change to the view coming from the model
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* (Extending action so we can reuse the ActionBusFactory)
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*/
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interface Change : Action
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/**
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* A ViewState is a model reflecting the current state of the view
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*/
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interface ViewState
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/**
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* A Reducer applies changes to the ViewState
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*/
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typealias Reducer<S, C> = (S, C) -> S
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/**
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* Simple logger for tracking ViewState changes
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*/
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fun <S> logState(): ObservableTransformer<S, S> = ObservableTransformer { observable ->
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observable.doOnNext {
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if (BuildConfig.DEBUG) Logger("State").debug(it.toString())
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}
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}
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/**
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* For capturing state to a Subject for testing
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*/
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fun <S> captureState(subject: Subject<S>):
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ObservableTransformer<S, S> = ObservableTransformer { observable ->
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observable.doOnNext {
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subject.onNext(it)
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}
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}
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