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package net.ttcxy.tang.portal.controller.api;

import cn.hutool.cache.Cache;
import cn.hutool.cache.CacheUtil;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.lang.Validator;
import cn.hutool.core.util.StrUtil;
import com.fasterxml.jackson.annotation.JsonProperty;
import net.ttcxy.tang.portal.core.api.ApiException;
import net.ttcxy.tang.portal.core.api.ResponseCode;
import net.ttcxy.tang.portal.core.api.ResponseResult;
import net.ttcxy.tang.portal.core.security.CurrentUtil;
import net.ttcxy.tang.portal.core.security.filter.JwtFilter;
import net.ttcxy.tang.portal.core.security.jwt.TokenProvider;
import net.ttcxy.tang.portal.entity.dto.CurrentAuthor;
import net.ttcxy.tang.portal.entity.model.UtsAuthor;
import net.ttcxy.tang.portal.entity.param.UtsLoginParam;
import net.ttcxy.tang.portal.entity.param.UtsRePasswordParam;
import net.ttcxy.tang.portal.entity.param.UtsRegisterParam;
import net.ttcxy.tang.portal.service.UtsAuthorService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;

/**
 * 登录，注册，修改密码
 */
@RestController
@RequestMapping("/api")
public class LoginController {

   public static Cache<String,String> fifoCache = CacheUtil.newTimedCache(6000);

   private final TokenProvider tokenProvider;

   @Autowired
   private UtsAuthorService authorService;

   private final AuthenticationManagerBuilder authenticationManagerBuilder;

   public LoginController(TokenProvider tokenProvider, AuthenticationManagerBuilder authenticationManagerBuilder) {
      this.tokenProvider = tokenProvider;
      this.authenticationManagerBuilder = authenticationManagerBuilder;
   }

   @PostMapping("/authenticate")
   public ResponseEntity<JwtToken> authorize(@Valid @RequestBody UtsLoginParam loginParam) {

      UsernamePasswordAuthenticationToken authenticationToken =
         new UsernamePasswordAuthenticationToken(loginParam.getUsername(), loginParam.getPassword());

      Authentication authentication = authenticationManagerBuilder.getObject().authenticate(authenticationToken);
      SecurityContextHolder.getContext().setAuthentication(authentication);

      boolean rememberMe = loginParam.getRememberMe() != null && loginParam.getRememberMe();
      String jwt = tokenProvider.createToken(authentication, rememberMe);

      HttpHeaders httpHeaders = new HttpHeaders();
      httpHeaders.add(JwtFilter.AUTHORIZATION_HEADER, "Bearer " + jwt);

      return new ResponseEntity<>(new JwtToken(jwt), httpHeaders, HttpStatus.OK);
   }

   @GetMapping("/user")
   public ResponseEntity<CurrentAuthor> getActualUser() {
      return ResponseEntity.ok(CurrentUtil.author());
   }

   @PostMapping("register")
   public ResponseResult<?> register(@RequestBody UtsRegisterParam param){
      String mail = param.getMail();
      if (Validator.isEmail(mail)){
         Boolean isTrue = authorService.selectMailIsTrue(mail);
         if (isTrue){
            throw new ApiException("邮箱以存在");
         }
         UtsAuthor author = BeanUtil.toBean(param, UtsAuthor.class);
         String password = param.getPassword();
         author.setPassword(new BCryptPasswordEncoder().encode(password));
         author.setMail(mail);
         int count = authorService.insertAuthor(author);
         if (count > 0){
            return ResponseResult.success("注册成功");
         }
         throw new ApiException(ResponseCode.FAILED);
      }else{
         throw new ApiException("请输入邮箱号");
      }
   }

   @PostMapping("password")
   public ResponseResult<String> updatePassword(@RequestBody UtsRePasswordParam param){
      String mail = param.getMail();
      Boolean isTrue = authorService.selectMailIsTrue(mail);
      if (!isTrue){
         throw new ApiException("邮箱不存在");
      }
      String code = fifoCache.get(mail);
      if (code == null){
         throw new ApiException("没有发送邮箱号");
      }
      if (StrUtil.equals(code, param.getCode())){
         String password = param.getPassword();
         UtsAuthor author = BeanUtil.toBean(param, UtsAuthor.class);
         author.setPassword(new BCryptPasswordEncoder().encode(password));
         int count = authorService.updateAuthorByName(author);
         if (count > 0){
            return ResponseResult.success("修改成功");
         }
      }
      throw new ApiException();
   }

   /**
    * JWT Authentication.
    */
   static class JwtToken {

      private String jwtToken;

      JwtToken(String jwtToken) {
         this.jwtToken = jwtToken;
      }

      @JsonProperty("jwt_token")
      String getJwtToken() {
         return jwtToken;
      }

      void setJwtToken(String jwtToken) {
         this.jwtToken = jwtToken;
      }
   }
}

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