Android Open Source - hubblog Account Authenticator

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The source code is released under:
MIT License
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Java Source Code

package com.github.mobile.Accounts;
//from www .ja v a2 s  .  c  o  m
import android.accounts.*;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import com.donskifarrell.Hubblog.Activities.LoginActivity;
import org.eclipse.egit.github.core.Authorization;
import org.eclipse.egit.github.core.service.OAuthService;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import static android.accounts.AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE;
import static android.accounts.AccountManager.KEY_ACCOUNT_NAME;
import static android.accounts.AccountManager.KEY_ACCOUNT_TYPE;
import static android.accounts.AccountManager.KEY_AUTHTOKEN;
import static android.accounts.AccountManager.KEY_BOOLEAN_RESULT;
import static android.accounts.AccountManager.KEY_INTENT;

import static com.donskifarrell.Hubblog.Activities.LoginActivity.PARAM_AUTHTOKEN_TYPE;
import static com.donskifarrell.Hubblog.Activities.LoginActivity.PARAM_USERNAME;

/**
 * Created with IntelliJ IDEA.
 * User: donski
 * Date: 10/12/13
 * Time: 20:17
 */
public class AccountAuthenticator extends AbstractAccountAuthenticator {

    private static final String TAG = "GitHubAccountAuthenticator";

    private static final List<String> SCOPES = Arrays.asList("repo", "user", "gist");

    private Context context;

    public AccountAuthenticator(final Context context) {
        super(context);

        this.context = context;
    }

    /**
     * The user has requested to add a new account to the system. We return an
     * intent that will launch our login screen if the user has not logged in
     * yet, otherwise our activity will just pass the user's credentials on to
     * the account manager.
     */
    @Override
    public Bundle addAccount(final AccountAuthenticatorResponse response,
                             final String accountType, final String authTokenType,
                             final String[] requiredFeatures, final Bundle options)
            throws NetworkErrorException {
        final Intent intent = new Intent(context, LoginActivity.class);
        intent.putExtra(PARAM_AUTHTOKEN_TYPE, authTokenType);
        intent.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
        final Bundle bundle = new Bundle();
        bundle.putParcelable(KEY_INTENT, intent);
        return bundle;
    }

    @Override
    public Bundle confirmCredentials(
            final AccountAuthenticatorResponse response, final Account account,
            final Bundle options) {
        return null;
    }

    @Override
    public Bundle editProperties(final AccountAuthenticatorResponse response,
                                 final String accountType) {
        return null;
    }

    private static boolean isValidAuthorization(final Authorization auth,
                                                final List<String> requiredScopes) {
        if (auth == null)
            return false;

        if (!AccountConstants.APP_NOTE.equals(auth.getNote()))
            return false;

        if (!AccountConstants.APP_NOTE_URL.equals(auth.getNoteUrl()))
            return false;

        List<String> scopes = auth.getScopes();
        return scopes != null && scopes.containsAll(requiredScopes);
    }

    private Intent createLoginIntent(final AccountAuthenticatorResponse response) {
        final Intent intent = new Intent(context, LoginActivity.class);
        intent.putExtra(PARAM_AUTHTOKEN_TYPE, AccountConstants.ACCOUNT_TYPE);
        intent.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
        return intent;
    }

    /**
     * Get existing authorization for this app
     *
     * @param service
     * @return token or null if none found
     * @throws IOException
     */
    public static String getAuthorization(final OAuthService service) throws IOException {
        for (Authorization auth : service.getAuthorizations())
            if (isValidAuthorization(auth, SCOPES))
                return auth.getToken();
        return null;
    }

    /**
     * Create authorization for this app
     *
     * @param service
     * @return created token
     * @throws IOException
     */
    public static String createAuthorization(final OAuthService service) throws IOException {
        Authorization auth = new Authorization();
        auth.setNote(AccountConstants.APP_NOTE);
        auth.setNoteUrl(AccountConstants.APP_NOTE_URL);
        auth.setScopes(SCOPES);
        auth = service.createAuthorization(auth);
        return auth != null ? auth.getToken() : null;
    }

    @Override
    public Bundle getAuthToken(final AccountAuthenticatorResponse response,
                               final Account account, final String authTokenType,
                               final Bundle options) throws NetworkErrorException {
        Log.d(TAG, "Retrieving OAuth2 token");

        final Bundle bundle = new Bundle();

        if (!AccountConstants.ACCOUNT_TYPE.equals(authTokenType))
            return bundle;

        AccountManager am = AccountManager.get(context);
        String password = am.getPassword(account);
        if (TextUtils.isEmpty(password)) {
            bundle.putParcelable(KEY_INTENT, createLoginIntent(response));
            return bundle;
        }

        DefaultClient client = new DefaultClient();
        client.setCredentials(account.name, password);
        OAuthService service = new OAuthService(client);

        String authToken;
        try {
            authToken = getAuthorization(service);
            if (TextUtils.isEmpty(authToken))
                authToken = createAuthorization(service);
        } catch (IOException e) {
            Log.e(TAG, "Authorization retrieval failed", e);
            throw new NetworkErrorException(e);
        }

        if (TextUtils.isEmpty(authToken))
            bundle.putParcelable(KEY_INTENT, createLoginIntent(response));
        else {
            bundle.putString(KEY_ACCOUNT_NAME, account.name);
            bundle.putString(KEY_ACCOUNT_TYPE, AccountConstants.ACCOUNT_TYPE);
            bundle.putString(KEY_AUTHTOKEN, authToken);
            am.clearPassword(account);
        }
        return bundle;
    }

    @Override
    public String getAuthTokenLabel(final String authTokenType) {
        if (AccountConstants.ACCOUNT_TYPE.equals(authTokenType))
            return authTokenType;
        else
            return null;
    }

    @Override
    public Bundle hasFeatures(final AccountAuthenticatorResponse response,
                              final Account account, final String[] features)
            throws NetworkErrorException {
        final Bundle result = new Bundle();
        result.putBoolean(KEY_BOOLEAN_RESULT, false);
        return result;
    }

    @Override
    public Bundle updateCredentials(
            final AccountAuthenticatorResponse response, final Account account,
            final String authTokenType, final Bundle options) {
        final Intent intent = new Intent(context, LoginActivity.class);
        intent.putExtra(PARAM_AUTHTOKEN_TYPE, authTokenType);
        intent.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
        if (!TextUtils.isEmpty(account.name))
            intent.putExtra(PARAM_USERNAME, account.name);
        final Bundle bundle = new Bundle();
        bundle.putParcelable(KEY_INTENT, intent);
        return bundle;
    }
}
Java Source Code List
