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UnsplashExampleWorker.kt
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UnsplashExampleWorker.kt
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/*
* Copyright 2018 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 com.example.muzei.unsplash
import android.util.Log
import androidx.core.net.toUri
import androidx.work.Constraints
import androidx.work.NetworkType
import androidx.work.OneTimeWorkRequestBuilder
import androidx.work.WorkManager
import androidx.work.Worker
import com.google.android.apps.muzei.api.provider.Artwork
import com.google.android.apps.muzei.api.provider.ProviderContract
import java.io.IOException
class UnsplashExampleWorker : Worker() {
companion object {
private const val TAG = "UnsplashExample"
internal fun enqueueLoad() {
val workManager = WorkManager.getInstance() ?: return
workManager.enqueue(OneTimeWorkRequestBuilder<UnsplashExampleWorker>()
.setConstraints(Constraints.Builder()
.setRequiredNetworkType(NetworkType.CONNECTED)
.build())
.build())
}
}
override fun doWork(): Result {
val photos = try {
UnsplashService.popularPhotos()
} catch (e: IOException) {
Log.w(TAG, "Error reading Unsplash response", e)
return Result.RETRY
}
if (photos.isEmpty()) {
Log.w(TAG, "No photos returned from API.")
return Result.FAILURE
}
val attributionString = applicationContext.getString(R.string.attribution)
photos.map { photo ->
Artwork().apply {
token = photo.id
title = photo.description ?: attributionString
byline = photo.user.name
attribution = if (photo.description != null) attributionString else null
persistentUri = photo.urls.full.toUri()
webUri = photo.links.webUri
metadata = photo.user.links.webUri.toString()
}
}.forEach { artwork ->
ProviderContract.Artwork.addArtwork(applicationContext,
UnsplashExampleArtProvider::class.java,
artwork)
}
return Result.SUCCESS
}
}