arcanechat-android/src/main/java/org/thoughtcrime/securesms/EphemeralMessagesDialog.java

package org.thoughtcrime.securesms;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.core.widget.TextViewCompat;
import java.util.concurrent.TimeUnit;
import org.thoughtcrime.securesms.connect.DcHelper;
import org.thoughtcrime.securesms.util.ViewUtil;

public class EphemeralMessagesDialog {

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

  public static void show(
      final Context context,
      int currentSelectedTime,
      final @NonNull EphemeralMessagesInterface listener) {
    CharSequence[] choices =
        context.getResources().getStringArray(R.array.ephemeral_message_durations);
    int preselected = getPreselection(currentSelectedTime);
    final int[] selectedChoice = new int[] {preselected};

    View dialogView = View.inflate(context, R.layout.dialog_extended_options, null);
    RadioGroup container = dialogView.findViewById(R.id.optionsContainer);
    for (CharSequence choice : choices) {

      RadioButton radioButton = new RadioButton(context);
      radioButton.setText(choice);
      TextViewCompat.setTextAppearance(radioButton, android.R.style.TextAppearance_Medium);

      RadioGroup.LayoutParams params =
          new RadioGroup.LayoutParams(
              ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
      params.setMargins(0, 0, 0, ViewUtil.dpToPx(context, 8));
      radioButton.setLayoutParams(params);
      container.addView(radioButton);
    }

    container.setOnCheckedChangeListener(
        (group, checkedId) -> {
          int childCount = group.getChildCount();
          for (int x = 0; x < childCount; x++) {
            RadioButton btn = (RadioButton) group.getChildAt(x);
            if (btn.getId() == checkedId) {
              selectedChoice[0] = x;
            }
          }
        });
    container.check(container.getChildAt(preselected).getId());

    TextView messageView = dialogView.findViewById(R.id.description);
    messageView.setText(context.getString(R.string.ephemeral_messages_hint));

    AlertDialog.Builder builder =
        new AlertDialog.Builder(context)
            .setTitle(R.string.ephemeral_messages)
            .setView(dialogView)
            .setNegativeButton(R.string.cancel, null)
            .setPositiveButton(
                R.string.ok,
                (dialog, which) -> {
                  final long burnAfter;
                  switch (selectedChoice[0]) {
                    case 1:
                      burnAfter = TimeUnit.MINUTES.toSeconds(5);
                      break;
                    case 2:
                      burnAfter = TimeUnit.HOURS.toSeconds(1);
                      break;
                    case 3:
                      burnAfter = TimeUnit.DAYS.toSeconds(1);
                      break;
                    case 4:
                      burnAfter = TimeUnit.DAYS.toSeconds(7);
                      break;
                    case 5:
                      burnAfter = TimeUnit.DAYS.toSeconds(35);
                      break;
                    case 6:
                      burnAfter = TimeUnit.DAYS.toSeconds(365);
                      break;
                    default:
                      burnAfter = 0;
                      break;
                  }
                  listener.onTimeSelected(burnAfter);
                })
            .setNeutralButton(
                R.string.learn_more, (d, w) -> DcHelper.openHelp(context, "#ephemeralmsgs"));
    builder.show();
  }

  public interface EphemeralMessagesInterface {
    void onTimeSelected(long duration);
  }

  private static int getPreselection(int timespan) {
    if (timespan == 0) {
      return 0; // off
    }
    // Choose timespan close to the current one out of available options.
    if (timespan < TimeUnit.HOURS.toSeconds(1)) {
      return 1; // 5 minutes
    }
    if (timespan < TimeUnit.DAYS.toSeconds(1)) {
      return 2; // 1 hour
    }
    if (timespan < TimeUnit.DAYS.toSeconds(7)) {
      return 3; // 1 day
    }
    if (timespan < TimeUnit.DAYS.toSeconds(35)) {
      return 4; // 1 week
    }
    if (timespan < TimeUnit.DAYS.toSeconds(365)) {
      return 5; // 5 weeks
    }
    return 6; // 1 year
  }
}