PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/appwidgets/base/BaseAppWidget.java

package code.name.monkey.retromusic.appwidgets.base;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.TextUtils;
import android.widget.RemoteViews;
import code.name.monkey.retromusic.Constants;
import code.name.monkey.retromusic.R;
import code.name.monkey.retromusic.model.Song;
import code.name.monkey.retromusic.service.MusicService;

public abstract class BaseAppWidget extends AppWidgetProvider {

  public static final String NAME = "app_widget";

  protected static Bitmap createBitmap(Drawable drawable, float sizeMultiplier) {
    Bitmap bitmap = Bitmap.createBitmap((int) (drawable.getIntrinsicWidth() * sizeMultiplier),
        (int) (drawable.getIntrinsicHeight() * sizeMultiplier), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bitmap);
    drawable.setBounds(0, 0, c.getWidth(), c.getHeight());
    drawable.draw(c);
    return bitmap;
  }

  protected static Bitmap createRoundedBitmap(Drawable drawable, int width, int height, float tl,
      float tr, float bl, float br) {
    if (drawable == null) {
      return null;
    }

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(bitmap);
    drawable.setBounds(0, 0, width, height);
    drawable.draw(c);

    Bitmap rounded = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(rounded);
    Paint paint = new Paint();
    paint.setShader(
        new BitmapShader(bitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
    paint.setAntiAlias(true);
    canvas.drawPath(composeRoundedRectPath(new RectF(0, 0, width, height), tl, tr, bl, br), paint);

    return rounded;
  }

  protected static Path composeRoundedRectPath(RectF rect, float tl, float tr, float bl, float br) {
    Path path = new Path();
    tl = tl < 0 ? 0 : tl;
    tr = tr < 0 ? 0 : tr;
    bl = bl < 0 ? 0 : bl;
    br = br < 0 ? 0 : br;

    path.moveTo(rect.left + tl, rect.top);
    path.lineTo(rect.right - tr, rect.top);
    path.quadTo(rect.right, rect.top, rect.right, rect.top + tr);
    path.lineTo(rect.right, rect.bottom - br);
    path.quadTo(rect.right, rect.bottom, rect.right - br, rect.bottom);
    path.lineTo(rect.left + bl, rect.bottom);
    path.quadTo(rect.left, rect.bottom, rect.left, rect.bottom - bl);
    path.lineTo(rect.left, rect.top + tl);
    path.quadTo(rect.left, rect.top, rect.left + tl, rect.top);
    path.close();

    return path;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void onUpdate(final Context context, final AppWidgetManager appWidgetManager,
      final int[] appWidgetIds) {
    defaultAppWidget(context, appWidgetIds);
    final Intent updateIntent = new Intent(Constants.APP_WIDGET_UPDATE);
    updateIntent.putExtra(Constants.EXTRA_APP_WIDGET_NAME, NAME);
    updateIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
    updateIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
    context.sendBroadcast(updateIntent);
  }

  /**
   * Handle a change notification coming over from {@link MusicService}
   */
  public void notifyChange(final MusicService service, final String what) {
    if (hasInstances(service)) {
      if (Constants.META_CHANGED.equals(what) || Constants.PLAY_STATE_CHANGED.equals(what)) {
        performUpdate(service, null);
      }
    }
  }

  protected void pushUpdate(final Context context, final int[] appWidgetIds,
      final RemoteViews views) {
    final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    if (appWidgetIds != null) {
      appWidgetManager.updateAppWidget(appWidgetIds, views);
    } else {
      appWidgetManager.updateAppWidget(new ComponentName(context, getClass()), views);
    }
  }

  /**
   * Check against {@link AppWidgetManager} if there are any instances of this widget.
   */
  protected boolean hasInstances(final Context context) {
    final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    final int[] mAppWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context,
        getClass()));
    return mAppWidgetIds.length > 0;
  }

  protected PendingIntent buildPendingIntent(Context context, final String action,
      final ComponentName serviceName) {
    Intent intent = new Intent(action);
    intent.setComponent(serviceName);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
      return PendingIntent.getForegroundService(context, 0, intent, 0);
    } else {
      return PendingIntent.getService(context, 0, intent, 0);
    }
  }

  abstract protected void defaultAppWidget(final Context context, final int[] appWidgetIds);

  abstract public void performUpdate(final MusicService service, final int[] appWidgetIds);

  protected Drawable getAlbumArtDrawable(final Resources resources, final Bitmap bitmap) {
    Drawable image;
    if (bitmap == null) {
      image = resources.getDrawable(R.drawable.default_album_art);
    } else {
      image = new BitmapDrawable(resources, bitmap);
    }
    return image;
  }

  protected String getSongArtistAndAlbum(final Song song) {
    final StringBuilder builder = new StringBuilder();
    builder.append(song.artistName);
    if (!TextUtils.isEmpty(song.artistName) && !TextUtils.isEmpty(song.albumName)) {
      builder.append(" • ");
    }
    builder.append(song.albumName);
    return builder.toString();
  }
}