ShutdownWakeReceiver.java

package org.smartpaws.notifications;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;


import org.apache.commons.io.FileUtils;
import org.smartpaws.net.DataMan;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class ShutdownWakeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        AlarmService.setContext(context);

        if (intent.getAction().equalsIgnoreCase(Intent.ACTION_SHUTDOWN)) saveReminders();
        if (intent.getAction().equalsIgnoreCase(Intent.ACTION_BOOT_COMPLETED)) {
            try {
                File file = new File(AlarmService.getContext().getFilesDir(), "reminders.json");

                if (!file.getParentFile().exists() || !file.exists()) return;

                String fileContents = FileUtils.readFileToString(file);
                if (fileContents == null || fileContents.length() == 0) {
                    file.delete();
                    return;
                }

                AlarmService.Reminder[] reminders = DataMan.GSON.fromJson(fileContents, AlarmService.Reminder[].class);
                List<AlarmService.Reminder> result = new ArrayList<>();
                Collections.addAll(result, reminders);

                AlarmService.clearReminders();
                for (AlarmService.Reminder container : result) {
                    AlarmService.setReminder(container.getEvent(), container.getMinsBefore(), container.getRoom());
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }

    public static void saveReminders() {
        try {
            File file = new File(AlarmService.getContext().getFilesDir(), "reminders.json");

            if ((!file.getParentFile().exists() && !file.mkdirs())
                    || (!file.exists() && !file.createNewFile()))
                throw new IllegalStateException("File was not saved: could not be created");

            FileUtils.writeStringToFile(file, DataMan.GSON.toJson(AlarmService.getReminders()));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public static void loadReminders() {
        try {
            File file = new File(AlarmService.getContext().getFilesDir(), "reminders.json");

            if (!file.getParentFile().exists() || !file.exists()) return;

            String fileContents = FileUtils.readFileToString(file);
            if (fileContents == null || fileContents.length() == 0) {
                file.delete();
                return;
            }

            AlarmService.Reminder[] reminders = DataMan.GSON.fromJson(fileContents, AlarmService.Reminder[].class);
            List<AlarmService.Reminder> result = new ArrayList<>();
            Collections.addAll(result, reminders);

            AlarmService.clearReminders();
            for (AlarmService.Reminder container : result) {
                AlarmService.setReminder(container.getEvent(), container.getMinsBefore(), container.getRoom());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}