package org.oxerr.spring.security.wechat.samples.helloworld.service.impl;
   
   import org.oxerr.spring.security.wechat.core.userdetails.WeChatUserDetailsService;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.security.authentication.BadCredentialsException;
   import org.springframework.security.core.AuthenticationException;
   import org.springframework.security.core.userdetails.UserDetails;
   import org.springframework.stereotype.Service;
   
  import com.foxinmy.weixin4j.exception.WeixinException;
  import com.foxinmy.weixin4j.mp.api.OauthApi;
  import com.foxinmy.weixin4j.mp.model.OauthToken;
  import com.foxinmy.weixin4j.mp.model.User;
  
  @Service
  public class WeChatUserDetailsServiceImpl implements WeChatUserDetailsService {
  
  	private OauthApi oauthApi;
  
  	@Autowired
  	public WeChatUserDetailsServiceImpl(OauthApi oauthApi) {
  		this.oauthApi = oauthApi;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public UserDetails loadUserByCode(String code)
  			throws AuthenticationException {
  		try {
  			OauthToken oauthToken = oauthApi.getAuthorizationToken(code);
  			User user = oauthApi.getAuthorizationUser(oauthToken);
  			return new WeChatUserDetails(user);
  		} catch (WeixinException e) {
  			throw new BadCredentialsException(e.getMessage(), e);
  		}
  	}
  
  }