PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/activities/WhatsNewActivity.java

package code.name.monkey.retromusic.activities;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.widget.NestedScrollView;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Locale;

import code.name.monkey.appthemehelper.ThemeStore;
import code.name.monkey.appthemehelper.util.ATHUtil;
import code.name.monkey.appthemehelper.util.ColorUtil;
import code.name.monkey.appthemehelper.util.MaterialValueHelper;
import code.name.monkey.appthemehelper.util.ToolbarContentTintHelper;
import code.name.monkey.retromusic.Constants;
import code.name.monkey.retromusic.R;
import code.name.monkey.retromusic.activities.base.AbsBaseActivity;
import code.name.monkey.retromusic.databinding.ActivityWhatsNewBinding;
import code.name.monkey.retromusic.extensions.ColorExtKt;
import code.name.monkey.retromusic.util.PreferenceUtil;
import code.name.monkey.retromusic.util.RetroUtil;

public class WhatsNewActivity extends AbsBaseActivity {

  private static String colorToCSS(int color) {
    return String.format(
            Locale.getDefault(),
            "rgba(%d, %d, %d, %d)",
            Color.red(color),
            Color.green(color),
            Color.blue(color),
            Color.alpha(color)); // on API 29, WebView doesn't load with hex colors
  }

  private static void setChangelogRead(@NonNull Context context) {
    try {
      PackageInfo pInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
      int currentVersion = pInfo.versionCode;
      PreferenceUtil.INSTANCE.setLastVersion(currentVersion);
    } catch (PackageManager.NameNotFoundException e) {
      e.printStackTrace();
    }
  }

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    setDrawUnderStatusBar();
    super.onCreate(savedInstanceState);
    ActivityWhatsNewBinding binding = ActivityWhatsNewBinding.inflate(getLayoutInflater());
    setContentView(binding.getRoot());
    setStatusbarColorAuto();
    setNavigationbarColorAuto();
    setTaskDescriptionColorAuto();

    binding.toolbar.setBackgroundColor(ATHUtil.INSTANCE.resolveColor(this, R.attr.colorSurface));
    binding.toolbar.setNavigationOnClickListener(v -> onBackPressed());
    ToolbarContentTintHelper.colorBackButton(binding.toolbar);

    try {
      StringBuilder buf = new StringBuilder();
      InputStream json = getAssets().open("retro-changelog.html");
      BufferedReader in = new BufferedReader(new InputStreamReader(json, StandardCharsets.UTF_8));
      String str;
      while ((str = in.readLine()) != null) {
        buf.append(str);
      }
      in.close();

      // Inject color values for WebView body background and links
      final boolean isDark = ATHUtil.INSTANCE.isWindowBackgroundDark(this);
      final int accentColor = ThemeStore.Companion.accentColor(this);
      final String backgroundColor =
              colorToCSS(
                      ATHUtil.INSTANCE.resolveColor(
                              this, R.attr.colorSurface, Color.parseColor(isDark ? "#424242" : "#ffffff")));
      final String contentColor = colorToCSS(Color.parseColor(isDark ? "#ffffff" : "#000000"));
      final String textColor = colorToCSS(Color.parseColor(isDark ? "#60FFFFFF" : "#80000000"));
      final String accentColorString = colorToCSS(ThemeStore.Companion.accentColor(this));
      final String cardBackgroundColor = colorToCSS(Color.parseColor(isDark ? "#353535" : "#ffffff"));
      final String accentTextColor =
              colorToCSS(
                      MaterialValueHelper.getPrimaryTextColor(
                              this, ColorUtil.INSTANCE.isColorLight(accentColor)));
      final String changeLog =
              buf.toString()
                      .replace(
                              "{style-placeholder}",
                              String.format(
                                      "body { background-color: %s; color: %s; } li {color: %s;} h3 {color: %s;} .tag {color: %s;} div{background-color: %s;}",
                                      backgroundColor,
                                      contentColor,
                                      textColor,
                                      accentColorString,
                                      accentColorString,
                                      cardBackgroundColor))
                      .replace("{link-color}", colorToCSS(ThemeStore.Companion.accentColor(this)))
                      .replace(
                              "{link-color-active}",
                              colorToCSS(
                                      ColorUtil.INSTANCE.lightenColor(ThemeStore.Companion.accentColor(this))));
      binding.webView.loadData(changeLog, "text/html", "UTF-8");
    } catch (Throwable e) {
      binding.webView.loadData(
              "<h1>Unable to load</h1><p>" + e.getLocalizedMessage() + "</p>", "text/html", "UTF-8");
    }
    setChangelogRead(this);
    binding.tgFab.setOnClickListener(v -> RetroUtil.openUrl(this, Constants.TELEGRAM_CHANGE_LOG));
    ColorExtKt.accentColor(binding.tgFab);
    binding.tgFab.shrink();
    binding.container.setOnScrollChangeListener((NestedScrollView.OnScrollChangeListener) (v, scrollX, scrollY, oldScrollX, oldScrollY) -> {
      int dy = scrollY - oldScrollY;
      if (dy > 0) {
        binding.tgFab.shrink();
      } else if (dy < 0) {
        binding.tgFab.extend();
      }
    });
  }
}