tasks/src-legacy/com/timsu/astrid/activities/TaskModificationActivity.java

/*
 * ASTRID: Android's Simple Task Recording Dashboard
 *
 * Copyright (c) 2009 Tim Su
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package com.timsu.astrid.activities;

import android.app.Activity;
import android.content.DialogInterface;
import android.content.res.Resources;
import android.os.Bundle;

import com.flurry.android.FlurryAgent;
import com.timsu.astrid.R;
import com.timsu.astrid.data.task.AbstractTaskModel;
import com.timsu.astrid.data.task.TaskController;
import com.timsu.astrid.data.task.TaskIdentifier;
import com.timsu.astrid.utilities.Constants;
import com.timsu.astrid.utilities.DialogUtilities;

/** Abstract activity that operates on a single task. Use the generic parameter
 * to pass in the model class you are working with.
 *
 * @author timsu
 */
public abstract class TaskModificationActivity<MODEL_TYPE extends
        AbstractTaskModel> extends Activity {
    public static final String LOAD_INSTANCE_TOKEN = "id";
    protected TaskController controller;
    protected MODEL_TYPE model;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try {
            controller = new TaskController(this);
            controller.open();

            // check if we have a TaskIdentifier
            TaskIdentifier identifier = null;
            Bundle extras = getIntent().getExtras();
            if(savedInstanceState != null && savedInstanceState.containsKey(LOAD_INSTANCE_TOKEN)) {
                identifier = new TaskIdentifier(savedInstanceState.getLong(
                        LOAD_INSTANCE_TOKEN));
            } else if(extras != null && extras.containsKey(LOAD_INSTANCE_TOKEN))
                identifier = new TaskIdentifier(extras.getLong(
                        LOAD_INSTANCE_TOKEN));

            model = getModel(identifier);
        } catch (Exception e) {
            showErrorAndFinish(R.string.error_opening, e);
        }
    }

    @Override
    protected void onStart() {
        super.onStart();

        // set up flurry
        FlurryAgent.onStartSession(this, Constants.FLURRY_KEY);
    }

    @Override
    protected void onStop() {
        super.onStop();
        FlurryAgent.onEndSession(this);
    }

    protected void showErrorAndFinish(int prefix, Throwable e) {
        Resources r = getResources();
        DialogUtilities.okDialog(this,
                r.getString(prefix) + " " +
                e.getLocalizedMessage(), new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                finish();
            }
        });
    }

    abstract protected MODEL_TYPE getModel(TaskIdentifier identifier);

    @Override
    protected void onDestroy() {
        super.onDestroy();
        controller.close();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if(model.getTaskIdentifier() != null)
            outState.putLong(LOAD_INSTANCE_TOKEN, model.getTaskIdentifier().getId());
    }
}