Réimplémentation of android LiveDatas on kotlin-multiplatform

It wraps reals livedatas on Android, and uses an Observable-Pattern on iOS

It works exactly the same as Android LiveDatas : https://developer.android.com/topic/libraries/architecture/livedata

KLiveData<T> Read only observable KMutableLiveData<T> Read / Write observable KMediatorLiveData<T> Read / Write observable, capable of listen KLiveData

Transformations like map and switchmap are available too

class MainViewModel(val premiumManager: PremiumManager) {
    private val _viewState = KMediatorLiveData<ViewState>()
    
    val viewState = KLiveData<ViewState>()
        get() = _viewState

    init {
        _viewState.value = ViewState("not premium")

        _viewState.addSource(premiumManager.premium()) {
            if(it) {
                _viewState.value = ViewState("premium")
            } else {
                _viewState.value = ViewState("not premium")
            }
        }
    }
}

class ViewState(
    val userStatus: String
)

class PremiumManager {
    private val premium = KMutableLiveData<Boolean>()
    fun premium() : KLiveData<Boolean> {
        return premium
    }

    fun becomePremium() {
        premium.value = true
    }

    init {
        //default value
        premium.value = false
    }
}

Add the repository

repositories {
    maven { url  "https://dl.bintray.com/florent37/maven" }
}

implementation "com.github.florent37:multiplatform-livedata:1.0.0"

Uses a kotlin reimplementation of livedatas

implementation "com.github.florent37:multiplatform-livedata-ios:1.0.0"

Uses inside the jetpack's LiveDatas

implementation "com.github.florent37:multiplatform-livedata-android:1.0.0"

You can retrieve the real livedatas stored inside :

KLiveData<T>.toLivedata : LiveData<T>

KMutableLiveData<T>.toMutableLiveData : MutableLiveData<T>

KMediatorLiveData<T>.toMediatorLivedata : MediatorLivedata<T>

And create KLiveDatas from jetpacks LiveDatas

LiveData<T>.toKLivedata: KLiveData<T>

MutableLiveData<T>.toKMutableLiveData: KMutableLiveData<T>

MediatorLiveData<T>.toKMediatorLivedata: KMediatorLiveData<T>

Copyright 2018 Florent37

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.