kdeconnect-android/src/org/kde/kdeconnect/Plugins/SharePlugin/ReceiveNotification.java

package org.kde.kdeconnect.Plugins.SharePlugin;

/*
 * SPDX-FileCopyrightText: 2017 Nicolas Fella <nicolas.fella@gmx.de>
 *
 * SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.preference.PreferenceManager;

import androidx.core.app.NotificationCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.FileProvider;

import org.kde.kdeconnect.Device;
import org.kde.kdeconnect.Helpers.NotificationHelper;
import org.kde.kdeconnect_tp.BuildConfig;
import org.kde.kdeconnect_tp.R;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

class ReceiveNotification {
    private final NotificationManager notificationManager;
    private final int notificationId;
    private NotificationCompat.Builder builder;
    private final Device device;
    private final long jobId;

    //https://documentation.onesignal.com/docs/android-customizations#section-big-picture
    private static final int bigImageWidth = 1440;
    private static final int bigImageHeight = 720;

    public ReceiveNotification(Device device, long jobId) {
        this.device = device;

        this.jobId = jobId;
        notificationId = (int) System.currentTimeMillis();
        notificationManager = ContextCompat.getSystemService(device.getContext(), NotificationManager.class);
        builder = new NotificationCompat.Builder(device.getContext(), NotificationHelper.Channels.FILETRANSFER_DOWNLOAD)
                .setSmallIcon(android.R.drawable.stat_sys_download)
                .setAutoCancel(true)
                .setOngoing(true)
                .setProgress(100, 0, true);
        addCancelAction();
    }

    public void show() {
        NotificationHelper.notifyCompat(notificationManager, notificationId, builder.build());
    }

    public void cancel() {
        notificationManager.cancel(notificationId);
    }

    public void addCancelAction() {

        Intent cancelIntent = new Intent(device.getContext(), ShareBroadcastReceiver.class);
        cancelIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        cancelIntent.setAction(SharePlugin.ACTION_CANCEL_SHARE);
        cancelIntent.putExtra(SharePlugin.CANCEL_SHARE_BACKGROUND_JOB_ID_EXTRA, jobId);
        cancelIntent.putExtra(SharePlugin.CANCEL_SHARE_DEVICE_ID_EXTRA, device.getDeviceId());
        PendingIntent cancelPendingIntent = PendingIntent.getBroadcast(device.getContext(), 0, cancelIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);

        builder.addAction(R.drawable.ic_reject_pairing_24dp, device.getContext().getString(R.string.cancel), cancelPendingIntent);
    }

    public void setTitle(String title) {
        builder.setContentTitle(title);
        builder.setTicker(title);
    }

    public void setProgress(int progress, String progressMessage) {
        builder.setProgress( 100, progress, false);
        builder.setContentText(progressMessage);
        builder.setStyle(new NotificationCompat.BigTextStyle().bigText(progressMessage));
    }

    public void setFinished(String message) {
        builder = new NotificationCompat.Builder(device.getContext(), NotificationHelper.Channels.FILETRANSFER_DOWNLOAD);
        builder.setContentTitle(message)
                .setTicker(message)
                .setSmallIcon(android.R.drawable.stat_sys_download_done)
                .setAutoCancel(true)
                .setOngoing(false);

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(device.getContext());
        if (prefs.getBoolean("share_notification_preference", true)) {
            builder.setDefaults(Notification.DEFAULT_ALL);
        }
    }

    public void setFailed(String message) {
        setFinished(message);
        builder.setSmallIcon(android.R.drawable.stat_notify_error)
                .setChannelId(NotificationHelper.Channels.FILETRANSFER_ERROR);

    }

    public void setURI(Uri destinationUri, String mimeType, String filename) {
        /*
         * We only support file URIs (because sending a content uri to another app does not work for security reasons).
         * In effect, that means only the default download folder currently works.
         *
         * TODO: implement our own content provider (instead of support-v4's FileProvider). It should:
         *  - Proxy to real files (in case of the default download folder)
         *  - Proxy to the underlying content uri (in case of a custom download folder)
         */

        //If it's an image, try to show it in the notification
        if (mimeType.startsWith("image/")) {
            //https://developer.android.com/topic/performance/graphics/load-bitmap
            final BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;

            try (InputStream decodeBoundsInputStream = device.getContext().getContentResolver().openInputStream(destinationUri);
                 InputStream decodeInputStream = device.getContext().getContentResolver().openInputStream(destinationUri)) {
                BitmapFactory.decodeStream(decodeBoundsInputStream, null, options);

                options.inJustDecodeBounds = false;
                options.inSampleSize = calculateInSampleSize(options, bigImageWidth, bigImageHeight);

                Bitmap image = BitmapFactory.decodeStream(decodeInputStream, null, options);
                if (image != null) {
                    builder.setLargeIcon(image);
                    builder.setStyle(new NotificationCompat.BigPictureStyle()
                            .bigPicture(image));
                }
            } catch (IOException ignored) {
            }
        }

        Intent intent = new Intent(Intent.ACTION_VIEW);
        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.setType(mimeType);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && "file".equals(destinationUri.getScheme())) {
            //Nougat and later require "content://" uris instead of "file://" uris
            File file = new File(destinationUri.getPath());
            Uri contentUri = FileProvider.getUriForFile(device.getContext(), BuildConfig.APPLICATION_ID+".fileprovider", file);
            intent.setDataAndType(contentUri, mimeType);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            shareIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
        } else {
            intent.setDataAndType(destinationUri, mimeType);
            shareIntent.putExtra(Intent.EXTRA_STREAM, destinationUri);
        }
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        PendingIntent resultPendingIntent = PendingIntent.getActivity(
                device.getContext(),
                0,
                intent,
                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE
        );

        builder.setContentText(device.getContext().getResources().getString(R.string.received_file_text, filename))
                .setContentIntent(resultPendingIntent);

        shareIntent = Intent.createChooser(shareIntent,
                device.getContext().getString(R.string.share_received_file, destinationUri.getLastPathSegment()));
        PendingIntent sharePendingIntent = PendingIntent.getActivity(device.getContext(), (int) System.currentTimeMillis(),
                shareIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
        NotificationCompat.Action.Builder shareAction = new NotificationCompat.Action.Builder(
                R.drawable.ic_share_white, device.getContext().getString(R.string.share), sharePendingIntent);
        builder.addAction(shareAction.build());
    }

    private int calculateInSampleSize(BitmapFactory.Options options, int targetWidth, int targetHeight) {
        int inSampleSize = 1;

        if (options.outHeight > targetHeight || options.outWidth > targetWidth) {
            final int halfHeight = options.outHeight / 2;
            final int halfWidth = options.outWidth / 2;

            while ((halfHeight / inSampleSize) >= targetHeight
                    && (halfWidth / inSampleSize) >= targetWidth) {
                inSampleSize *= 2;
            }
        }

        return inSampleSize;
    }
}