Merge pull request #712 from android/tj/news-notifications
Notify users when news are updatedpull/691/merge
Adetunji Dahunsi
2 years ago
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GitHub
commit
3b1b1ea4c1
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/*
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* Copyright 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.core.notifications
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import com.google.samples.apps.nowinandroid.core.model.data.NewsResource
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import javax.inject.Inject
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import javax.inject.Singleton
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/**
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* Implementation of [Notifier] that displays notifications in the system tray.
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*/
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@Singleton
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class AndroidSystemNotifier @Inject constructor() : Notifier {
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override fun onNewsAdded(newsResources: List<NewsResource>) {
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// TODO, create notification and display to the user
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}
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}
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/*
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* Copyright 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.core.notifications
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import android.Manifest.permission
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import android.app.Notification
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import android.app.NotificationChannel
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import android.app.NotificationManager
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import android.app.PendingIntent
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import android.content.ComponentName
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import android.content.Context
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import android.content.Intent
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import android.content.pm.PackageManager
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import android.os.Build.VERSION
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import android.os.Build.VERSION_CODES
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import androidx.core.app.ActivityCompat
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import androidx.core.app.NotificationCompat
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import androidx.core.app.NotificationCompat.InboxStyle
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import androidx.core.app.NotificationManagerCompat
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import androidx.core.net.toUri
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import com.google.samples.apps.nowinandroid.core.model.data.NewsResource
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import dagger.hilt.android.qualifiers.ApplicationContext
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import javax.inject.Inject
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import javax.inject.Singleton
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private const val MAX_NUM_NOTIFICATIONS = 5
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private const val TARGET_ACTIVITY_NAME = "com.google.samples.apps.nowinandroid.MainActivity"
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private const val NEWS_NOTIFICATION_REQUEST_CODE = 0
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private const val NEWS_NOTIFICATION_SUMMARY_ID = 1
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private const val NEWS_NOTIFICATION_CHANNEL_ID = ""
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private const val NEWS_NOTIFICATION_GROUP = "NEWS_NOTIFICATIONS"
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private const val DEEP_LINK_SCHEME_AND_HOST = "https://www.nowinandroid.apps.samples.google.com"
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private const val FOR_YOU_PATH = "foryou"
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/**
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* Implementation of [Notifier] that displays notifications in the system tray.
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*/
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@Singleton
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class SystemTrayNotifier @Inject constructor(
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@ApplicationContext private val context: Context,
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) : Notifier {
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override fun postNewsNotifications(
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newsResources: List<NewsResource>,
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) = with(context) {
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if (ActivityCompat.checkSelfPermission(
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this,
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permission.POST_NOTIFICATIONS,
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) != PackageManager.PERMISSION_GRANTED
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) {
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return
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}
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val truncatedNewsResources = newsResources
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.take(MAX_NUM_NOTIFICATIONS)
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val newsNotifications = truncatedNewsResources
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.map { newsResource ->
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createNewsNotification {
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setSmallIcon(
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com.google.samples.apps.nowinandroid.core.common.R.drawable.ic_nia_notification,
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)
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.setContentTitle(newsResource.title)
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.setContentText(newsResource.content)
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.setContentIntent(newsPendingIntent(newsResource))
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.setGroup(NEWS_NOTIFICATION_GROUP)
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.setAutoCancel(true)
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}
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}
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val summaryNotification = createNewsNotification {
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val title = getString(
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R.string.news_notification_group_summary,
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truncatedNewsResources.size,
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)
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setContentTitle(title)
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.setContentText(title)
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.setSmallIcon(
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com.google.samples.apps.nowinandroid.core.common.R.drawable.ic_nia_notification,
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)
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// Build summary info into InboxStyle template.
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.setStyle(newsNotificationStyle(truncatedNewsResources, title))
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.setGroup(NEWS_NOTIFICATION_GROUP)
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.setGroupSummary(true)
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.setAutoCancel(true)
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.build()
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}
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// Send the notifications
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val notificationManager = NotificationManagerCompat.from(this)
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newsNotifications.forEachIndexed { index, notification ->
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notificationManager.notify(
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truncatedNewsResources[index].id.hashCode(),
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notification,
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)
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}
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notificationManager.notify(NEWS_NOTIFICATION_SUMMARY_ID, summaryNotification)
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}
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/**
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* Creates an inbox style summary notification for news updates
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*/
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private fun newsNotificationStyle(
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newsResources: List<NewsResource>,
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title: String,
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): InboxStyle = newsResources
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.fold(InboxStyle()) { inboxStyle, newsResource ->
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inboxStyle.addLine(newsResource.title)
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}
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.setBigContentTitle(title)
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.setSummaryText(title)
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}
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/**
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* Creates a notification for configured for news updates
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*/
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private fun Context.createNewsNotification(
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block: NotificationCompat.Builder.() -> Unit,
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): Notification {
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ensureNotificationChannelExists()
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return NotificationCompat.Builder(
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this,
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NEWS_NOTIFICATION_CHANNEL_ID,
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)
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.setPriority(NotificationCompat.PRIORITY_DEFAULT)
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.apply(block)
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.build()
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}
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/**
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* Ensures the a notification channel is is present if applicable
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*/
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private fun Context.ensureNotificationChannelExists() {
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if (VERSION.SDK_INT < VERSION_CODES.O) return
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val channel = NotificationChannel(
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NEWS_NOTIFICATION_CHANNEL_ID,
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getString(R.string.news_notification_channel_name),
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NotificationManager.IMPORTANCE_DEFAULT,
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).apply {
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description = getString(R.string.news_notification_channel_description)
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}
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// Register the channel with the system
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NotificationManagerCompat.from(this).createNotificationChannel(channel)
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}
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private fun Context.newsPendingIntent(
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newsResource: NewsResource,
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): PendingIntent? = PendingIntent.getActivity(
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this,
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NEWS_NOTIFICATION_REQUEST_CODE,
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Intent().apply {
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action = Intent.ACTION_VIEW
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data = newsResource.newsDeepLinkUri()
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component = ComponentName(
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packageName,
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TARGET_ACTIVITY_NAME,
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)
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},
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PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
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)
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private fun NewsResource.newsDeepLinkUri() = "$DEEP_LINK_SCHEME_AND_HOST/$FOR_YOU_PATH/$id".toUri()
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