完成部分帖子相关功能，同时完善了一些用户功能
Change-Id: Ie9d22bcceec197930d48f578d8b9a749ce7a3382
diff --git a/src/main/java/com/pt/controller/PostController.java b/src/main/java/com/pt/controller/PostController.java
new file mode 100644
index 0000000..844dc65
--- /dev/null
+++ b/src/main/java/com/pt/controller/PostController.java
@@ -0,0 +1,131 @@
+package com.pt.controller;
+
+import com.pt.constant.Constants;
+import com.pt.entity.Post;
+import com.pt.service.PostService;
+import com.pt.utils.JWTUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/posts")
+@CrossOrigin(origins = "*")
+public class PostController {
+
+ @Autowired
+ private PostService postService;
+
+ /*
+ * 创建一个新帖子
+ * @param token 用户的JWT令牌
+ * @param title 帖子标题
+ * @param content 帖子内容
+ * @param author 帖子作者（用户名）
+ * @return 创建成功的响应
+ */
+ @PostMapping("/create")
+ public ResponseEntity<?> createPost(
+ @RequestHeader("token") String token,
+ @RequestParam("title") String title,
+ @RequestParam("content") String content,
+ @RequestParam("author") String author
+ ) {
+
+ Map<String, Object> ans = new HashMap<>();
+
+ if(!JWTUtils.checkToken(token, author, Constants.UserRole.USER)){
+ ans.put("result", "Invalid token");
+ return ResponseEntity.badRequest().body(ans);
+ }
+
+ Post existingPost = postService.findPostByTitle(title);
+ if (existingPost != null) {
+ ans.put("result", "Post with this title already exists");
+ return ResponseEntity.badRequest().body(ans);
+ }
+
+ postService.createPost(title, content, author);
+ ans.put("result", "Post created successfully");
+ return ResponseEntity.ok(ans);
+ }
+
+ /*
+ * 获取帖子列表
+ * @param token 用户的JWT令牌
+ * @param username 用户名
+ * @param title 帖子标题（可选）
+ * @param author 帖子作者（可选）
+ * @param date 帖子发布日期（可选）
+ * @return 帖子列表的响应
+ */
+ @GetMapping("/list")
+ public ResponseEntity<?> getPost(
+ @RequestHeader("token") String token,
+ @RequestParam("username") String username,
+ @RequestParam(value = "title", required = false) String title,
+ @RequestParam(value = "author", required = false) String author,
+ @RequestParam(value = "date", required = false) String date
+ ) {
+
+ Map<String, Object> ans = new HashMap<>();
+
+ if(!JWTUtils.checkToken(token, username, Constants.UserRole.USER)){
+ ans.put("result", "Invalid token");
+ return ResponseEntity.badRequest().body(ans);
+ }
+
+ List<Post> posts = postService.listAll();
+
+ if(title != null){
+ posts.removeIf(post -> !post.getTitle().startsWith(title));
+ }
+
+ if(author != null){
+ posts.removeIf(post -> !post.getAuthor().startsWith(author));
+ }
+
+ if(date != null){
+ posts.removeIf(post -> !post.getPublishDate().toString().equals(date));
+ }
+ ans.put("result", "Post retrieved successfully");
+ ans.put("post", posts);
+ return ResponseEntity.ok(ans);
+ }
+
+ /*
+ * 删除帖子
+ * @param token 用户的JWT令牌
+ * @param username 用户名
+ * @param pid 帖子ID
+ * @return 删除成功的响应
+ */
+ @DeleteMapping("/delete")
+ public ResponseEntity<?> deletePost(
+ @RequestHeader("token") String token,
+ @RequestParam("username") String username,
+ @RequestParam("pid") int pid
+ ) {
+
+ Map<String, Object> ans = new HashMap<>();
+
+ if(!JWTUtils.checkToken(token, username, Constants.UserRole.ADMIN)){
+ ans.put("result", "Invalid token");
+ return ResponseEntity.badRequest().body(ans);
+ }
+
+ Post post = postService.findPostById(pid);
+ if (post == null) {
+ ans.put("result", "Post not found");
+ return ResponseEntity.badRequest().body(ans);
+ }
+
+ postService.deletePost(post);
+ ans.put("result", "Post deleted successfully");
+ return ResponseEntity.ok(ans);
+ }
+}