/*
    * Copyright 2002-2011 the original author or authors.
    *
    * 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
    *
    *      https://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 org.springframework.security.oauth2.provider.approval;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.springframework.security.core.Authentication;
  import org.springframework.security.oauth2.common.util.OAuth2Utils;
  import org.springframework.security.oauth2.provider.AuthorizationRequest;
  
  /**
   * A default user approval handler that doesn't remember any decisions.
   * 
   * @author Dave Syer
   * 
   */
  public class DefaultUserApprovalHandler implements UserApprovalHandler {
  
  	private String approvalParameter = OAuth2Utils.USER_OAUTH_APPROVAL;
  	
  	/**
  	 * @param approvalParameter the approvalParameter to set
  	 */
  	public void setApprovalParameter(String approvalParameter) {
  		this.approvalParameter = approvalParameter;
  	}
  
  	/**
  	 * Basic implementation just requires the authorization request to be explicitly approved and the user to be
  	 * authenticated.
  	 * 
  	 * @param authorizationRequest The authorization request.
  	 * @param userAuthentication the current user authentication
  	 * 
  	 * @return Whether the specified request has been approved by the current user.
  	 */
  	public boolean isApproved(AuthorizationRequest authorizationRequest, Authentication userAuthentication) {
  		if (authorizationRequest.isApproved()) {
  			return true;
  		}
  		return false;
  	}
  
  	public AuthorizationRequestringframework/security/oauth2/provider/AuthorizationRequest.html#AuthorizationRequest">AuthorizationRequest checkForPreApproval(AuthorizationRequest authorizationRequest, Authentication userAuthentication) {
  		return authorizationRequest;
  	}
  
  	@Override
  	public AuthorizationRequestringframework/security/oauth2/provider/AuthorizationRequest.html#AuthorizationRequest">AuthorizationRequest updateAfterApproval(AuthorizationRequest authorizationRequest, Authentication userAuthentication) {
  		Map<String, String> approvalParameters = authorizationRequest.getApprovalParameters();
  		String flag = approvalParameters.get(approvalParameter);
  		boolean approved = flag != null && flag.toLowerCase().equals("true");
  		authorizationRequest.setApproved(approved);
  		return authorizationRequest;
  	}
  	
  	@Override
  	public Map<String, Object> getUserApprovalRequest(AuthorizationRequest authorizationRequest,
  			Authentication userAuthentication) {
  		Map<String, Object> model = new HashMap<String, Object>();
  		// In case of a redirect we might want the request parameters to be included
  		model.putAll(authorizationRequest.getRequestParameters());
  		return model;
  	}
  
  }