package com.android.internal.telephony;

/**
 *  Interface used to interact with extended MMI/USSD network service.
 */
interface IExtendedNetworkService {
    /**
     * Set a MMI/USSD command to ExtendedNetworkService for further process.
     * This should be called when a MMI command is placed from panel.
     * @param number the dialed MMI/USSD number.
     */
    void setMmiString(String number);

    /**
     * return the specific string which is used to prompt MMI/USSD is running
     */
    CharSequence getMmiRunningText();

    /**
     * Get specific message which should be displayed on pop-up dialog.
     * @param text original MMI/USSD message response from framework
     * @return specific user message correspond to text. null stands for no pop-up dialog need to show.
     */
    CharSequence getUserMessage(CharSequence text);

    /**
     * Clear timeout message and pre-set MMI/USSD command
     * This should be called when user cancel a pre-dialed MMI command.
     */
    void clearMmiString();
}

/**
 *  Interface used to interact with extended MMI/USSD network service.
 */
interface IExtendedNetworkService {
    /**
     * Set a MMI/USSD command to ExtendedNetworkService for further process.
     * This should be called when a MMI command is placed from panel.
     * @param number the dialed MMI/USSD number.
     */
    void setMmiString(String number);

    /**
     * return the specific string which is used to prompt MMI/USSD is running
     */
    CharSequence getMmiRunningText();

    /**
     * Get specific message which should be displayed on pop-up dialog.
     * @param text original MMI/USSD message response from framework
     * @return specific user message correspond to text. null stands for no pop-up dialog need to show.
     */
    CharSequence getUserMessage(CharSequence text);

    /**
     * Clear timeout message and pre-set MMI/USSD command
     * This should be called when user cancel a pre-dialed MMI command.
     */
    void clearMmiString();
}

package com.commandus.ussd;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.os.IBinder;
import android.os.PatternMatcher;
import android.os.RemoteException;
import android.util.Log;

import com.android.internal.telephony.IExtendedNetworkService;
import com.commandus.callmeback.R;

/**
 * Service implements IExtendedNetworkService interface.
 * USSDDumbExtendedNetworkService
 * Service must have name "com.android.ussd.IExtendedNetworkService" of the intent declared
 * in the Android manifest file so com.android.phone.PhoneUtils class bind
 * to this service after system rebooted.
 * Please note service is loaded after system reboot!
 * Your application must check is system rebooted.
 * @see Util#syslogHasLine(String, String, String, boolean)
 */
public class USSDDumbExtendedNetworkService extends Service {
	public static final String TAG = "CommandusUSSDExtNetSvc";
	public static final String LOG_STAMP = "*USSDTestExtendedNetworkService bind successfully*";
	public static final String URI_SCHEME = "ussd";
	public static final String URI_AUTHORITY = "commandus.com";
	public static final String URI_PATH = "/";
	public static final String URI_PAR = "return";
	public static final String URI_PARON = "on";
	public static final String URI_PAROFF = "off";
	public static final String MAGIC_ON = ":ON;)";
	public static final String MAGIC_OFF = ":OFF;(";
	public static final String MAGIC_RETVAL = ":RETVAL;(";

	private static boolean mActive = false;
	private static CharSequence mRetVal = null;
	private Context mContext = null;
	private String msgUssdRunning = "xxx..."; 

    final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
        	if (Intent.ACTION_INSERT.equals(intent.getAction())) {
        		mContext = context;
        		if (mContext != null) {
        			msgUssdRunning = mContext.getString(R.string.msgRunning);
        			mActive = true;
        			Log.d(TAG, "activate");
        		}
            } else if (Intent.ACTION_DELETE.equals(intent.getAction())) {
            	mContext = null;
            	mActive = false;
            	Log.d(TAG, "deactivate");
            }
        }
    };

    private final IExtendedNetworkService.Stub mBinder = new IExtendedNetworkService.Stub() {
		@Override
		public void setMmiString(String number) throws RemoteException {
			Log.d(TAG, "setMmiString: " + number);
		}

		@Override
		public CharSequence getMmiRunningText() throws RemoteException {
			Log.d(TAG, "getMmiRunningText: " + msgUssdRunning);
			return msgUssdRunning;
		}

		@Override
		public CharSequence getUserMessage(CharSequence text)
				throws RemoteException {
			if (MAGIC_ON.contentEquals(text)) {
				mActive = true;
				Log.d(TAG, "control: ON");
				return text;
			} else {
				if (MAGIC_OFF.contentEquals(text)) {
					mActive = false;
					Log.d(TAG, "control: OFF");
					return text;
				} else {
					if (MAGIC_RETVAL.contentEquals(text)) {
						mActive = false;
						Log.d(TAG, "control: return");
						return mRetVal;
					}
				}
			}

			if (!mActive) {
				Log.d(TAG, "getUserMessage deactivated: " + text);
				return text;
			}
			String s = text.toString();
			// store s to the !
			Uri uri = new Uri.Builder()
				.scheme(URI_SCHEME)
				.authority(URI_AUTHORITY)
				.path(URI_PATH)
				.appendQueryParameter(URI_PAR, text.toString())
				.build();
			sendBroadcast(new Intent(Intent.ACTION_GET_CONTENT, uri));
			mActive = false;
			mRetVal = text;
			Log.d(TAG, "getUserMessage: " + text + "=" + s);
			return null;
		}

		@Override
		public void clearMmiString() throws RemoteException {
			Log.d(TAG, "clearMmiString");
		}
    };

    /**
     * Put stamp to the system log when PhoneUtils bind to the service
     * after Android has rebooted. Application must call {@link Util#syslogHasLine(String, String, String, boolean)} to
     * check is phone rebooted or no. Without reboot phone application does not bind tom this service!
     */
	@Override
	public IBinder onBind(Intent intent) {
		// Do not localize!
		Log.i(TAG, LOG_STAMP);
		IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_INSERT);
        filter.addAction(Intent.ACTION_DELETE);
        filter.addDataScheme(URI_SCHEME);
        filter.addDataAuthority(URI_AUTHORITY, null);
        filter.addDataPath(URI_PATH, PatternMatcher.PATTERN_LITERAL);
		registerReceiver(mReceiver, filter);

		return mBinder;
	}

	public IBinder asBinder() {
		Log.d(TAG, "asBinder");
		return mBinder;
	}

}