content: /*
   ===========================================================================
   Copyright (c) 2010 BrickRed Technologies Limited
  
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sub-license, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:
  
   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.
  
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
   ===========================================================================
  
   */
  
  package org.brickred.socialauth.provider;
  
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.brickred.socialauth.AbstractProvider;
  import org.brickred.socialauth.Contact;
  import org.brickred.socialauth.Permission;
  import org.brickred.socialauth.Profile;
  import org.brickred.socialauth.exception.AccessTokenExpireException;
  import org.brickred.socialauth.exception.ServerDataException;
  import org.brickred.socialauth.exception.SocialAuthException;
  import org.brickred.socialauth.oauthstrategy.OAuth2;
  import org.brickred.socialauth.oauthstrategy.OAuthStrategyBase;
  import org.brickred.socialauth.util.AccessGrant;
  import org.brickred.socialauth.util.Constants;
  import org.brickred.socialauth.util.MethodType;
  import org.brickred.socialauth.util.OAuthConfig;
  import org.brickred.socialauth.util.Response;
  import org.json.JSONObject;
  
  /**
   * Mendeley implementation of the provider.
   * 
   * @author tarun.nagpal@3pillarlabs.com
   * 
   */
  
  public class MendeleyImpl extends AbstractProvider {
  
  	private static final long serialVersionUID = -8791307959143391316L;
  	private static final String PROFILE_URL = "https://api-oauth2.mendeley.com/oapi/profiles/info/me/";
  	private static final Map<String, String> ENDPOINTS;
  	private final Log LOG = LogFactory.getLog(MendeleyImpl.class);
  	private static final String SCOPE = "all";
  
  	private Permission scope;
  	private boolean isVerify;
  	private AccessGrant accessToken;
  	private OAuthConfig config;
  	private Profile userProfile;
  	private OAuthStrategyBase authenticationStrategy;
  
  	static {
  		ENDPOINTS = new HashMap<String, String>();
  		ENDPOINTS.put(Constants.OAUTH_AUTHORIZATION_URL,
  				"https://api-oauth2.mendeley.com/oauth/authorize/");
  		ENDPOINTS.put(Constants.OAUTH_ACCESS_TOKEN_URL,
  				"https://api-oauth2.mendeley.com/oauth/token");
  	}
  
  	/**
  	 * Stores configuration for the provider
  	 * 
  	 * @param providerConfig
  	 *            It contains the configuration of application like consumer key
  	 *            and consumer secret
  	 * @throws Exception
  	 */
  	public MendeleyImpl(final OAuthConfig providerConfig) throws Exception {
  		config = providerConfig;
  
  		if (config.getAuthenticationUrl() != null) {
  			ENDPOINTS.put(Constants.OAUTH_AUTHORIZATION_URL,
  					config.getAuthenticationUrl());
  		} else {
  			config.setAuthenticationUrl(ENDPOINTS
  					.get(Constants.OAUTH_AUTHORIZATION_URL));
  		}
  
  		if (config.getAccessTokenUrl() != null) {
  			ENDPOINTS.put(Constants.OAUTH_ACCESS_TOKEN_URL,
  					config.getAccessTokenUrl());
  		} else {
  			config.setAccessTokenUrl(ENDPOINTS
  					.get(Constants.OAUTH_ACCESS_TOKEN_URL));
  		}
  		authenticationStrategy = new OAuth2(config, ENDPOINTS);
  		authenticationStrategy.setScope(SCOPE);
  	}
  
  	/**
  	 * Stores access grant for the provider
  	 * 
  	 * @param accessGrant
  	 *            It contains the access token and other information
  	 * @throws AccessTokenExpireException
  	 */
  	@Override
  	public void setAccessGrant(final AccessGrant accessGrant)
  			throws AccessTokenExpireException {
  		accessToken = accessGrant;
  		isVerify = true;
  		authenticationStrategy.setAccessGrant(accessGrant);
  	}
  
  	/**
  	 * This is the most important action. It redirects the browser to an
  	 * appropriate URL which will be used for authentication with the provider
  	 * that has been set using setId()
  	 * 
  	 * @throws Exception
  	 */
  	@Override
  	public String getLoginRedirectURL(final String successUrl) throws Exception {
  		LOG.info("Determining URL for redirection");
  		return authenticationStrategy.getLoginRedirectURL(successUrl);
  	}
  
  	/**
  	 * Verifies the user when the external provider redirects back to our
  	 * application.
  	 * 
  	 * @return Profile object containing the profile information
  	 * @param requestParams
  	 *            request parameters, received from the provider
  	 * @throws Exception
  	 */
  
  	@Override
  	public Profile verifyResponse(final Map<String, String> requestParams)
  			throws Exception {
  		return doVerifyResponse(requestParams);
  	}
  
  	private Profile doVerifyResponse(final Map<String, String> requestParams)
  			throws Exception {
  		LOG.info("Verifying the authentication response from provider");
  		accessToken = authenticationStrategy.verifyResponse(requestParams,
  				MethodType.POST.toString());
  		isVerify = true;
  		return getProfile();
  	}
  
  	private Profile getProfile() throws Exception {
  		Profile profile = new Profile();
  		String url = PROFILE_URL;
  		LOG.debug("Obtaining user profile. Profile URL : " + url);
  		Response serviceResponse = null;
  		try {
  			serviceResponse = authenticationStrategy.executeFeed(url);
  		} catch (Exception e) {
  			throw new SocialAuthException(
  					"Failed to retrieve the user profile from  " + url, e);
  		}
  		if (serviceResponse.getStatus() != 200) {
  			throw new SocialAuthException(
  					"Failed to retrieve the user profile from  " + url
  							+ ". Staus :" + serviceResponse.getStatus());
  		}
  		String result;
  		try {
  			result = serviceResponse
  					.getResponseBodyAsString(Constants.ENCODING);
  			LOG.debug("User Profile :" + result);
  		} catch (Exception exc) {
  			throw new SocialAuthException("Failed to read response from  "
  					+ url, exc);
  		}
  		try {
  			JSONObject pRes = new JSONObject(result);
  			JSONObject pObj = pRes.getJSONObject("main");
  			profile.setValidatedId(pObj.optString("profile_id", null));
  			String name = pObj.optString("name", null);
  			if (name != null && name.trim().length() > 0) {
  				profile.setFirstName(name);
  			}
  			String photo = pObj.optString("photo", null);
  			if (photo != null && photo.trim().length() > 0) {
  				profile.setProfileImageURL(photo);
  			}
  			profile.setProviderId(getProviderId());
  			if (config.isSaveRawResponse()) {
  				profile.setRawResponse(result);
  			}
  			userProfile = profile;
  			return profile;
  		} catch (Exception e) {
  			throw new ServerDataException(
  					"Failed to parse the user profile json : " + result, e);
  
  		}
  	}
  
  	/**
  	 * Updates the status on Mendeley.
  	 * 
  	 * @param msg
  	 *            Message to be shown as user's status
  	 * @throws Exception
  	 */
  	@Override
  	public Response updateStatus(final String msg) throws Exception {
  		throw new SocialAuthException(
  				"Mendeley does not support status updates");
  	}
  
  	/**
  	 * Gets the list of followers of the user and their screen name.
  	 * 
  	 * @return List of contact objects representing Contacts. Only name, screen
  	 *         name and profile URL will be available
  	 */
  	@Override
  	public List<Contact> getContactList() throws Exception {
  		LOG.warn("WARNING: Not implemented for Mendeley");
  		throw new SocialAuthException(
  				"Get contact list is not implemented for Mendeley");
  	}
  
  	/**
  	 * Logout
  	 */
  	@Override
  	public void logout() {
  		accessToken = null;
  		authenticationStrategy.logout();
  	}
  
  	/**
  	 * 
  	 * @param p
  	 *            Permission object which can be Permission.AUHTHENTICATE_ONLY,
  	 *            Permission.ALL, Permission.DEFAULT
  	 */
  	@Override
  	public void setPermission(final Permission p) {
  		LOG.debug("Permission requested : " + p.toString());
  		this.scope = p;
  	}
  
  	/**
  	 * Makes OAuth signed HTTP request to a given URL. It attaches Authorization
  	 * header with HTTP request.
  	 * 
  	 * @param url
  	 *            URL to make HTTP request.
  	 * @param methodType
  	 *            Method type can be GET, POST or PUT
  	 * @param params
  	 *            Any additional parameters whose signature need to compute.
  	 *            Only used in case of "POST" and "PUT" method type.
  	 * @param headerParams
  	 *            Any additional parameters need to pass as Header Parameters
  	 * @param body
  	 *            Request Body
  	 * @return Response object
  	 * @throws Exception
  	 */
  	@Override
  	public Response api(final String url, final String methodType,
  			final Map<String, String> params,
  			final Map<String, String> headerParams, final String body)
  			throws Exception {
  		if (!isVerify) {
  			throw new SocialAuthException(
  					"Please call verifyResponse function first to get Access Token");
  		}
  		Response response = null;
  		LOG.debug("Calling URL : " + url);
  		response = authenticationStrategy.executeFeed(url, methodType, params,
  				headerParams, body);
  		return response;
  	}
  
  	/**
  	 * Retrieves the user profile.
  	 * 
  	 * @return Profile object containing the profile information.
  	 */
  	@Override
  	public Profile getUserProfile() throws Exception {
  		if (userProfile == null && accessToken != null) {
  			getProfile();
  		}
  		return userProfile;
  	}
  
  	@Override
  	public AccessGrant getAccessGrant() {
  		return accessToken;
  	}
  
  	@Override
  	public String getProviderId() {
  		return config.getId();
  	}
  
  	@Override
  	public Response uploadImage(final String message, final String fileName,
  			final InputStream inputStream) throws Exception {
  		LOG.warn("WARNING: Not implemented for Mendeley");
  		throw new SocialAuthException(
  				"Upload Image is not implemented for Mendeley");
  	}
  
  	@Override
  	protected List<String> getPluginsList() {
  		List<String> list = new ArrayList<String>();
  		if (config.getRegisteredPlugins() != null
  				&& config.getRegisteredPlugins().length > 0) {
  			list.addAll(Arrays.asList(config.getRegisteredPlugins()));
  		}
  		return list;
  	}
  
  	@Override
  	protected OAuthStrategyBase getOauthStrategy() {
  		return authenticationStrategy;
  	}
  }