/
PaginatedTraktViewModel.kt
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/
PaginatedTraktViewModel.kt
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/*
* Copyright 2017 Google, Inc.
*
* 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.
*/
package me.banes.chris.tivi.util
import android.arch.lifecycle.LiveData
import android.arch.lifecycle.LiveDataReactiveStreams
import android.arch.lifecycle.MutableLiveData
import me.banes.chris.tivi.api.Resource
import me.banes.chris.tivi.api.Status
import me.banes.chris.tivi.calls.PaginatedTraktCall
import me.banes.chris.tivi.data.TiviShow
import me.banes.chris.tivi.extensions.plusAssign
open class PaginatedTraktViewModel<R>(
val schedulers: AppRxSchedulers,
val call: PaginatedTraktCall<R>) : RxAwareViewModel() {
/**
* This is what my UI (Fragment) observes. Its backed by Room and a network call
*/
val data: LiveData<List<TiviShow>> by lazy {
LiveDataReactiveStreams.fromPublisher(call.data())
}
val messages = MutableLiveData<Resource>()
init {
// Eagerly refresh the initial page of trending
fullRefresh()
}
fun onListScrolledToEnd() {
disposables += call.loadNextPage()
.observeOn(schedulers.main)
.doOnSubscribe { messages.value = Resource(Status.LOADING_MORE) }
.doOnError { messages.value = Resource(Status.ERROR, it.localizedMessage) }
.doOnComplete { messages.value = Resource(Status.SUCCESS) }
.subscribe()
}
fun fullRefresh() {
disposables += call.refresh()
.observeOn(schedulers.main)
.doOnSubscribe { messages.value = Resource(Status.REFRESHING) }
.doOnError { messages.value = Resource(Status.ERROR, it.localizedMessage) }
.doOnComplete { messages.value = Resource(Status.SUCCESS) }
.subscribe()
}
}