/
NewsPresenter.kt
56 lines (46 loc) · 1.63 KB
/
NewsPresenter.kt
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package com.ktoi.toi.presenter
import com.ktoi.toi.model.NewsItem
import com.ktoi.toi.shared.NewsApiInterface
import com.ktoi.toi.view.interfaces.NewsView
import io.realm.Realm
import rx.Observable
import rx.Subscription
import rx.android.schedulers.AndroidSchedulers
/**
* @author polyakov
* 09.11.16.
*/
class NewsPresenter {
private var mNewsApiInterface: NewsApiInterface? = null
private var mNewsView: NewsView? = null
private var subscription: Subscription? = null
fun onViewCreated(view: NewsView) {
mNewsView = view
}
fun setNewsApiInterface(newsApiInterface: NewsApiInterface) {
this.mNewsApiInterface = newsApiInterface
}
fun loadNews() {
subscription = mNewsApiInterface!!
.getNews()
.map { it.newsItem }
.flatMap({ items ->
Realm.getDefaultInstance().executeTransaction({ realm ->
realm.delete(NewsItem::class.java)
realm.insert(items)
})
Observable.just(items)
})
.onErrorResumeNext { throwable ->
val realm = Realm.getDefaultInstance()
val items = realm.where(NewsItem::class.java).findAll()
Observable.just(realm.copyFromRealm(items))
}
.observeOn(AndroidSchedulers.mainThread())
.doOnTerminate { mNewsView?.hideLoading() }
.subscribe({ mNewsView?.onNewsItemLoaded(it) }, { mNewsView?.onError(it) })
}
fun onDestroy() {
subscription?.unsubscribe()
}
}