/*
* Copyright 2010 Facebook, Inc.
*
* 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.facebook.android;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageButton;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.SessionEvents.AuthListener;
import com.facebook.android.SessionEvents.LogoutListener;
public class LoginButton extends ImageButton
{
private Facebook mFb;
private Handler mHandler;
private final SessionListener mSessionListener = new SessionListener();
private String[] mPermissions;
private Activity mActivity;
public LoginButton(Context context)
{
super(context);
}
public LoginButton(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public LoginButton(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
public void init(final Activity activity, final Facebook fb)
{
init(activity, fb, new String[]{});
}
public void init(final Activity activity, final Facebook fb, final String[] permissions)
{
mActivity = activity;
mFb = fb;
mPermissions = permissions;
mHandler = new Handler();
setBackgroundColor(Color.TRANSPARENT);
setAdjustViewBounds(true);
setImageResource(fb.isSessionValid() ? R.drawable.logout_button : R.drawable.login_button);
drawableStateChanged();
SessionEvents.addAuthListener(mSessionListener);
SessionEvents.addLogoutListener(mSessionListener);
setOnClickListener(new ButtonOnClickListener());
}
private final class ButtonOnClickListener implements OnClickListener
{
@Override
public void onClick(View arg0)
{
if (mFb.isSessionValid())
{
SessionEvents.onLogoutBegin();
AsyncFacebookRunner asyncRunner = new AsyncFacebookRunner(mFb);
asyncRunner.logout(getContext(), new LogoutRequestListener());
}
else
{
mFb.authorize(mActivity, mPermissions, new LoginDialogListener());
}
}
}
private final class LoginDialogListener implements DialogListener
{
@Override
public void onComplete(Bundle values)
{
SessionEvents.onLoginSuccess();
}
@Override
public void onFacebookError(FacebookError error)
{
SessionEvents.onLoginError(error.getMessage());
}
@Override
public void onError(DialogError error)
{
SessionEvents.onLoginError(error.getMessage());
}
@Override
public void onCancel()
{
SessionEvents.onLoginError("Action Canceled");
}
}
private class LogoutRequestListener extends BaseRequestListener
{
@Override
public void onComplete(String response, final Object state)
{
// callback should be run in the original thread,
// not the background thread
mHandler.post(new Runnable()
{
@Override
public void run()
{
SessionEvents.onLogoutFinish();
}
});
}
}
private class SessionListener implements AuthListener, LogoutListener
{
@Override
public void onAuthSucceed()
{
setImageResource(R.drawable.logout_button);
SessionStore.save(mFb, getContext());
}
@Override
public void onAuthFail(String error)
{
}
@Override
public void onLogoutBegin()
{
}
@Override
public void onLogoutFinish()
{
SessionStore.clear(getContext());
setImageResource(R.drawable.login_button);
}
}
}