gistfile1.java

package com.kuapay.library.activity;

import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.webkit.CookieManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.kuapay.library.KuapayLibrary;
import com.kuapay.library.R;
import com.kuapay.library.util.KuaUtils;
import com.kuapay.library.util.Kualog;
import java.util.HashMap;

public class FacebookLinkBrowserActivity extends KuaActivity
{
    //region Constant
    private static final String DEBUG_TAG = "[FacebookLinkBrowserActivity]";
    public static final String AUTH_URL_TAG = "auth_url_tag";
    //endregion

    //region Variables
    private WebView facebookWebView;
    private TextView headerTextView;
    private ImageButton backImageButton;
    private LinearLayout loadingLinearLayout;
    //endregion

    //region Listeners
    private View.OnClickListener backArrowImageButtonClickListener = new View.OnClickListener()
    {
        @Override
        public void onClick(View view)
        {
            onBackPressed();

        }
    };
    //endregion

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_social_link);
        bindUIElements();
        setUpListeners();
        setUpFacebookWebView();
        setUpLoadingView();
    }

    @Override
    public void onBackPressed()
    {
        facebookWebView.stopLoading();
        KuapayLibrary.socialProvider.callbackFailureFacebookLinkedResponse("Facebook not linked");
        finish();
    }

    @Override
    public void onLoggedOut()
    {
        finish();
    }

    private void bindUIElements()
    {
        facebookWebView    = (WebView) findViewById(R.id.social_link_webView);
        backImageButton       = (ImageButton) findViewById(R.id.social_link_back_arrow_imageButton);
        headerTextView     = (TextView) findViewById(R.id.view_header_textView);
        loadingLinearLayout = (LinearLayout) findViewById(R.id.social_link_loading);
    }

    private void setUpListeners()
    {
        backImageButton.setOnClickListener(backArrowImageButtonClickListener);
    }

    private void setUpFacebookWebView()
    {
        headerTextView.setText(getString(R.string.txt_link_facebook));
        CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.removeAllCookie();
        facebookWebView.getSettings().setJavaScriptEnabled(true);
        facebookWebView.setWebViewClient(new FacebookWebViewClient());
        facebookWebView.addJavascriptInterface(new CustomJavaScriptInterface(), "HTMLOUT");
        facebookWebView.loadUrl(getIntent().getStringExtra(AUTH_URL_TAG));
    }

    private void setUpLoadingView()
    {
        TextView titleTextView = (TextView) findViewById(R.id.loading_dialog_text);
        titleTextView.setText(getString(R.string.txt_linking_facebook));
        ImageView loadingMinutesImageView = (ImageView) findViewById(R.id.loading_dialog_minutes_imageView);
        Animation rotation = AnimationUtils.loadAnimation(FacebookLinkBrowserActivity.this, R.anim.rotate_indefinitely);
        rotation.setRepeatCount(Animation.INFINITE);
        loadingMinutesImageView.startAnimation(rotation);

        ImageView loadingHoursImageView = (ImageView) findViewById(R.id.loading_dialog_hours_imageView);
        Animation slowRotation = AnimationUtils.loadAnimation(FacebookLinkBrowserActivity.this, R.anim.rotate_indefinitely);
        slowRotation.setDuration(3000*12);
        slowRotation.setRepeatCount(Animation.INFINITE);
        loadingHoursImageView.startAnimation(slowRotation);
    }

    private class FacebookWebViewClient extends WebViewClient
    {
        @Override
        public void onPageFinished(WebView view, String url)
        {
            Kualog.print(DEBUG_TAG, "FacebookWebViewClient onPageFinished() url = " + url);
            if (url.startsWith("https://www.kuapay.com") || url.startsWith("http://www.kuapay.com"))
            {
                try
                {
                    HashMap<String, String> urlParams = KuaUtils.getUrlParams(url);
                    if (urlParams.containsKey("code"))
                    {
                        facebookWebView.loadUrl(KuapayLibrary.urlProvider.getFacebookAccessTokenUrl(urlParams.get("code")));
                        loadingLinearLayout.setVisibility(View.VISIBLE);
                    }
                    else if(urlParams.containsKey("error"))
                    {
                        onBackPressed();
                    }
                }
                catch (Exception e)
                {
                    Kualog.printException(DEBUG_TAG, "FacebookWebViewClient.onPageFinished()",e);
                    onBackPressed();
                }
            }
            else if(url.startsWith("https://graph.facebook.com/"))
            {
                view.loadUrl("javascript:window.HTMLOUT.showHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");
                loadingLinearLayout.setVisibility(View.VISIBLE);
            }
//            else if(url.contains("error=access_denied"))
//            {
//                onBackPressed();
//            }
            else
            {
                loadingLinearLayout.setVisibility(View.GONE);
            }
        }
}

    private class CustomJavaScriptInterface
    {
        @SuppressWarnings("unused")
        public void showHTML(String html)
        {
            //todo : refactor!!
            if(html.contains("access_token=") && html.contains("expires=")) //you still receive access_token & expires if permissions are denied
            {
                String body = html.substring(html.indexOf("access_token="), html.length()-1);
                body = body.substring(13, body.indexOf("<"));
                String accessToken = body.substring(0, body.indexOf("&"));
                String expires = body.substring(accessToken.length() + "access_token=".length());
                KuapayLibrary.socialProvider.setFacebookAuthentication(accessToken, expires);
                KuapayLibrary.socialProvider.callbackSuccessFacebookLinkedResponse("Facebook linked");
                finish();
            }
        }
    }
}