/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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 android.accounts;

import android.os.Bundle;
import android.os.RemoteException;

/**
 * Base class for creating AccountAuthenticators. This implements the IAccountAuthenticator
 * binder interface and also provides helper libraries to simplify the creation of
 * AccountAuthenticators.
 */
public abstract class AbstractAccountAuthenticator {
    class Transport extends IAccountAuthenticator.Stub {
        public void addAccount(IAccountAuthenticatorResponse response, String accountType,
                String authTokenType, String[] requiredFeatures, Bundle options)
                throws RemoteException {
            final Bundle result;
            try {
                result = AbstractAccountAuthenticator.this.addAccount(
                    new AccountAuthenticatorResponse(response),
                        accountType, authTokenType, requiredFeatures, options);
            } catch (NetworkErrorException e) {
                response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
                return;
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "addAccount not supported");
                return;
            }
            if (result != null) {
                response.onResult(result);
            }
        }

        public void confirmPassword(IAccountAuthenticatorResponse response,
                Account account, String password) throws RemoteException {
            boolean result;
            try {
                result = AbstractAccountAuthenticator.this.confirmPassword(
                    new AccountAuthenticatorResponse(response),
                        account, password);
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "confirmPassword not supported");
                return;
            } catch (NetworkErrorException e) {
                response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
                return;
            }
            Bundle bundle = new Bundle();
            bundle.putBoolean(Constants.BOOLEAN_RESULT_KEY, result);
            response.onResult(bundle);
        }

        public void confirmCredentials(IAccountAuthenticatorResponse response,
                Account account) throws RemoteException {
            final Bundle result;
            try {
                result = AbstractAccountAuthenticator.this.confirmCredentials(
                    new AccountAuthenticatorResponse(response), account);
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "confirmCredentials not supported");
                return;
            }
            if (result != null) {
                response.onResult(result);
            }
        }

        public void getAuthToken(IAccountAuthenticatorResponse response,
                Account account, String authTokenType, Bundle loginOptions)
                throws RemoteException {
            try {
                final Bundle result = AbstractAccountAuthenticator.this.getAuthToken(
                        new AccountAuthenticatorResponse(response), account,
                        authTokenType, loginOptions);
                if (result != null) {
                    response.onResult(result);
                }
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "getAuthToken not supported");
            } catch (NetworkErrorException e) {
                response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
            }
        }

        public void updateCredentials(IAccountAuthenticatorResponse response, Account account,
                String authTokenType, Bundle loginOptions) throws RemoteException {
            final Bundle result;
            try {
                result = AbstractAccountAuthenticator.this.updateCredentials(
                    new AccountAuthenticatorResponse(response), account,
                        authTokenType, loginOptions);
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "updateCredentials not supported");
                return;
            }
            if (result != null) {
                response.onResult(result);
            }
        }

        public void editProperties(IAccountAuthenticatorResponse response,
                String accountType) throws RemoteException {
            final Bundle result;
            try {
                result = AbstractAccountAuthenticator.this.editProperties(
                    new AccountAuthenticatorResponse(response), accountType);
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "editProperties not supported");
                return;
            }
            if (result != null) {
                response.onResult(result);
            }
        }

        public void hasFeatures(IAccountAuthenticatorResponse response,
                Account account, String[] features) throws RemoteException {
            final Bundle result;
            try {
                result = AbstractAccountAuthenticator.this.hasFeatures(
                    new AccountAuthenticatorResponse(response), account, features);
            } catch (UnsupportedOperationException e) {
                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
                        "hasFeatures not supported");
                return;
            } catch (NetworkErrorException e) {
                response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
                return;
            }
            if (result != null) {
                response.onResult(result);
            }
        }
    }

    Transport mTransport = new Transport();

    /**
     * @return the IAccountAuthenticator binder transport object
     */
    public final IAccountAuthenticator getIAccountAuthenticator()
    {
        return mTransport;
    }

    /**
     * Returns a Bundle that contains the Intent of the activity that can be used to edit the
     * properties. In order to indicate success the activity should call response.setResult()
     * with a non-null Bundle.
     * @param response used to set the result for the request. If the Constants.INTENT_KEY
     *   is set in the bundle then this response field is to be used for sending future
     *   results if and when the Intent is started.
     * @param accountType the AccountType whose properties are to be edited.
     * @return a Bundle containing the result or the Intent to start to continue the request.
     *   If this is null then the request is considered to still be active and the result should
     *   sent later using response.
     */
    public abstract Bundle editProperties(AccountAuthenticatorResponse response,
            String accountType);
    public abstract Bundle addAccount(AccountAuthenticatorResponse response, String accountType,
            String authTokenType, String[] requiredFeatures, Bundle options)
            throws NetworkErrorException;
    /* @deprecated */
    public abstract boolean confirmPassword(AccountAuthenticatorResponse response,
            Account account, String password) throws NetworkErrorException;
    public abstract Bundle confirmCredentials(AccountAuthenticatorResponse response,
            Account account);
    public abstract Bundle getAuthToken(AccountAuthenticatorResponse response,
            Account account, String authTokenType, Bundle loginOptions)
            throws NetworkErrorException;
    public abstract Bundle updateCredentials(AccountAuthenticatorResponse response,
            Account account, String authTokenType, Bundle loginOptions);
    public abstract Bundle hasFeatures(AccountAuthenticatorResponse response,
            Account account, String[] features) throws NetworkErrorException;
}