TwitterAuthenticationFragment.java

/*
 * Copyright (c) 2013 Mark Prichard
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.appdynamics.demo.gasp.fragment;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.appdynamics.demo.gasp.R;
import com.appdynamics.demo.gasp.activity.LocationsActivity;
import com.appdynamics.demo.gasp.activity.TwitterStreamActivity;
import com.appdynamics.demo.gasp.model.TwitterTokenResponse;
import com.appdynamics.demo.gasp.service.RESTIntentService;
import com.appdynamics.demo.gasp.twitter.TwitterAuthentication;
import com.google.gson.Gson;

/**
 * Closely modeled on Neil Goodman's Android REST tutorials
 * https://github.com/posco2k8/rest_service_tutorial
 * https://github.com/posco2k8/rest_loader_tutorial.git
 *
 * @author Mark Prichard
 */
public class TwitterAuthenticationFragment extends RESTResponderFragment {
    private static final String TAG = TwitterAuthenticationFragment.class.getName();

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        requestOAuthToken();
    }

    private void requestOAuthToken() {
        try {
            LocationsActivity activity = (LocationsActivity) getActivity();

            Intent intent = new Intent(activity, RESTIntentService.class);
            intent.setData(Uri.parse(TwitterAuthentication.getTwitterApiOAuthToken()));

            Bundle params = new Bundle();
            params.putString("grant_type", "client_credentials");

            Bundle headers = new Bundle();
            headers.putString("Authorization", TwitterAuthentication.getEncodedBase64Credentials());

            intent.putExtra(RESTIntentService.EXTRA_HTTP_VERB, RESTIntentService.POST);
            intent.putExtra(RESTIntentService.EXTRA_HEADERS, headers);
            intent.putExtra(RESTIntentService.EXTRA_PARAMS, params);
            intent.putExtra(RESTIntentService.EXTRA_RESULT_RECEIVER, getResultReceiver());

            activity.startService(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onRESTResult(int code, String result) {
        if (code == 200 && result != null) {
            TwitterTokenResponse twitterToken = new Gson().fromJson(result, TwitterTokenResponse.class);
            TwitterStreamActivity.setTwitterOAuthToken(twitterToken.getAccess_token());
            Log.d(TAG, "Twitter OAuth Access Token: " + twitterToken.getAccess_token());
            Log.d(TAG, "Twitter OAuth Token Type: " + twitterToken.getToken_type());
        } else {
            Activity activity = getActivity();
            if (activity != null) {
                Toast.makeText(activity,
                        getResources().getString(R.string.gasp_twitter_auth_error),
                        Toast.LENGTH_SHORT)
                        .show();
            }
        }
    }
}