session-android/src/org/thoughtcrime/securesms/notifications/SingleRecipientNotificationBuilder.java

package org.thoughtcrime.securesms.notifications;

import android.app.Notification;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationCompat.Action;
import android.support.v4.app.RemoteInput;
import android.text.SpannableStringBuilder;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;

import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.crypto.MasterSecret;
import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader;
import org.thoughtcrime.securesms.mms.Slide;
import org.thoughtcrime.securesms.mms.SlideDeck;
import org.thoughtcrime.securesms.preferences.NotificationPrivacyPreference;
import org.thoughtcrime.securesms.recipients.Recipient;
import org.thoughtcrime.securesms.recipients.Recipients;
import org.thoughtcrime.securesms.util.BitmapUtil;
import org.thoughtcrime.securesms.util.TextSecurePreferences;
import org.thoughtcrime.securesms.util.Util;

import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ExecutionException;

public class SingleRecipientNotificationBuilder extends AbstractNotificationBuilder {

  private static final String TAG = SingleRecipientNotificationBuilder.class.getSimpleName();

  private final List<CharSequence> messageBodies = new LinkedList<>();

  private       SlideDeck    slideDeck;
  private final MasterSecret masterSecret;

  public SingleRecipientNotificationBuilder(@NonNull Context context,
                                            @Nullable MasterSecret masterSecret,
                                            @NonNull NotificationPrivacyPreference privacy)
  {
    super(context, privacy);
    this.masterSecret = masterSecret;

    setSmallIcon(R.drawable.icon_notification);
    setColor(context.getResources().getColor(R.color.textsecure_primary));
    setPriority(TextSecurePreferences.getNotificationPriority(context));
    setCategory(NotificationCompat.CATEGORY_MESSAGE);
  }

  public void setThread(@NonNull Recipients recipients) {
    if (privacy.isDisplayContact()) {
      setContentTitle(recipients.toShortString());

      if (recipients.isSingleRecipient() && recipients.getPrimaryRecipient().getContactUri() != null) {
        addPerson(recipients.getPrimaryRecipient().getContactUri().toString());
      }

      setLargeIcon(recipients.getContactPhoto()
                            .asDrawable(context, recipients.getColor()
                                                          .toConversationColor(context)));
    } else {
      setContentTitle(context.getString(R.string.SingleRecipientNotificationBuilder_signal));
      setLargeIcon(Recipient.getUnknownRecipient()
                            .getContactPhoto()
                            .asDrawable(context, Recipient.getUnknownRecipient()
                                                          .getColor()
                                                          .toConversationColor(context)));
    }
  }

  public void setMessageCount(int messageCount) {
    setContentInfo(String.valueOf(messageCount));
    setNumber(messageCount);
  }

  public void setPrimaryMessageBody(@NonNull  Recipients threadRecipients,
                                    @NonNull  Recipient individualRecipient,
                                    @NonNull  CharSequence message,
                                    @Nullable SlideDeck slideDeck)
  {
    SpannableStringBuilder stringBuilder = new SpannableStringBuilder();

    if (privacy.isDisplayContact() && (threadRecipients.isGroupRecipient() || !threadRecipients.isSingleRecipient())) {
      stringBuilder.append(Util.getBoldedString(individualRecipient.toShortString() + ": "));
    }

    if (privacy.isDisplayMessage()) {
      setContentText(stringBuilder.append(message));
      this.slideDeck = slideDeck;
    } else {
      setContentText(stringBuilder.append(context.getString(R.string.SingleRecipientNotificationBuilder_new_message)));
    }
  }

  public void addAndroidAutoAction(@NonNull PendingIntent androidAutoReplyIntent,
                                   @NonNull PendingIntent androidAutoHeardIntent, long timestamp)
  {

    if (mContentTitle == null || mContentText == null)
      return;

    RemoteInput remoteInput = new RemoteInput.Builder(AndroidAutoReplyReceiver.VOICE_REPLY_KEY)
                                  .setLabel(context.getString(R.string.MessageNotifier_reply))
                                  .build();

    NotificationCompat.CarExtender.UnreadConversation.Builder unreadConversationBuilder =
            new NotificationCompat.CarExtender.UnreadConversation.Builder(mContentTitle.toString())
                .addMessage(mContentText.toString())
                .setLatestTimestamp(timestamp)
                .setReadPendingIntent(androidAutoHeardIntent)
                .setReplyAction(androidAutoReplyIntent, remoteInput);

    extend(new NotificationCompat.CarExtender().setUnreadConversation(unreadConversationBuilder.build()));
  }

  public void addActions(@Nullable MasterSecret masterSecret,
                         @NonNull PendingIntent markReadIntent,
                         @NonNull PendingIntent quickReplyIntent,
                         @NonNull PendingIntent wearableReplyIntent)
  {
    Action markAsReadAction = new Action(R.drawable.check,
                                         context.getString(R.string.MessageNotifier_mark_read),
                                         markReadIntent);

    if (masterSecret != null) {
      Action replyAction = new Action(R.drawable.ic_reply_white_36dp,
                                      context.getString(R.string.MessageNotifier_reply),
                                      quickReplyIntent);

      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        replyAction = new Action.Builder(R.drawable.ic_reply_white_36dp,
                                         context.getString(R.string.MessageNotifier_reply),
                                         wearableReplyIntent)
            .addRemoteInput(new RemoteInput.Builder(MessageNotifier.EXTRA_REMOTE_REPLY)
                                .setLabel(context.getString(R.string.MessageNotifier_reply)).build())
            .build();
      }

      Action wearableReplyAction = new Action.Builder(R.drawable.ic_reply,
                                                      context.getString(R.string.MessageNotifier_reply),
                                                      wearableReplyIntent)
          .addRemoteInput(new RemoteInput.Builder(MessageNotifier.EXTRA_REMOTE_REPLY)
                              .setLabel(context.getString(R.string.MessageNotifier_reply)).build())
          .build();

      addAction(markAsReadAction);
      addAction(replyAction);

      extend(new NotificationCompat.WearableExtender().addAction(markAsReadAction)
                                                      .addAction(wearableReplyAction));
    } else {
      addAction(markAsReadAction);

      extend(new NotificationCompat.WearableExtender().addAction(markAsReadAction));
    }
  }

  public void addMessageBody(@NonNull Recipients threadRecipients,
                             @NonNull Recipient individualRecipient,
                             @Nullable CharSequence messageBody)
  {
    SpannableStringBuilder stringBuilder = new SpannableStringBuilder();

    if (privacy.isDisplayContact() && (threadRecipients.isGroupRecipient() || !threadRecipients.isSingleRecipient())) {
      stringBuilder.append(Util.getBoldedString(individualRecipient.toShortString() + ": "));
    }

    if (privacy.isDisplayMessage()) {
      messageBodies.add(stringBuilder.append(messageBody == null ? "" : messageBody));
    } else {
      messageBodies.add(stringBuilder.append(context.getString(R.string.SingleRecipientNotificationBuilder_new_message)));
    }
  }

  @Override
  public Notification build() {
    if (privacy.isDisplayMessage()) {
      if (messageBodies.size() == 1 && hasBigPictureSlide(slideDeck)) {
        assert masterSecret != null;
        setStyle(new NotificationCompat.BigPictureStyle()
                     .bigPicture(getBigPicture(masterSecret, slideDeck))
                     .setSummaryText(getBigText(messageBodies)));
      } else {
        setStyle(new NotificationCompat.BigTextStyle().bigText(getBigText(messageBodies)));
      }
    }

    return super.build();
  }

  private void setLargeIcon(@Nullable Drawable drawable) {
    if (drawable != null) {
      int    largeIconTargetSize  = context.getResources().getDimensionPixelSize(R.dimen.contact_photo_target_size);
      Bitmap recipientPhotoBitmap = BitmapUtil.createFromDrawable(drawable, largeIconTargetSize, largeIconTargetSize);

      if (recipientPhotoBitmap != null) {
        setLargeIcon(recipientPhotoBitmap);
      }
    }
  }

  private boolean hasBigPictureSlide(@Nullable SlideDeck slideDeck) {
    if (masterSecret == null || slideDeck == null || Build.VERSION.SDK_INT < 16) {
      return false;
    }

    Slide thumbnailSlide = slideDeck.getThumbnailSlide();

    return thumbnailSlide != null         &&
           thumbnailSlide.hasImage()      &&
           !thumbnailSlide.isInProgress() &&
           thumbnailSlide.getThumbnailUri() != null;
  }

  private Bitmap getBigPicture(@NonNull MasterSecret masterSecret,
                               @NonNull SlideDeck slideDeck)
  {
    try {
      @SuppressWarnings("ConstantConditions")
      Uri uri = slideDeck.getThumbnailSlide().getThumbnailUri();

      return Glide.with(context)
                  .load(new DecryptableStreamUriLoader.DecryptableUri(masterSecret, uri))
                  .asBitmap()
                  .diskCacheStrategy(DiskCacheStrategy.NONE)
                  .into(500, 500)
                  .get();
    } catch (InterruptedException | ExecutionException e) {
      throw new AssertionError(e);
    }
  }

  private CharSequence getBigText(List<CharSequence> messageBodies) {
    SpannableStringBuilder content = new SpannableStringBuilder();

    for (CharSequence message : messageBodies) {
      content.append(message);
      content.append('\n');
    }

    return content;
  }

}