解耦数据访问

Main.go

+package main
+
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	db "BackEnd/db"
+)
+
+
+
+func main() {
+
+	log.Println("INTERN PROJECT - COMMENT SERVICE")
+	log.Println("Press Ctrl+C to exit")
+
+	db.InitDB("./comments.db")
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, os.Interrupt)
+
+	go func() {
+        <-quit
+        log.Println("Shutting down server...")
+		db.CloseDB()
+        os.Exit(0)
+    }()
+	
+	initServer()
+}
\ No newline at end of file

Server.go

@@ -5,7 +5,6 @@ import (
 	"log"
 	"net/http"
 	"strconv"
-	"sync"
 
 	db "BackEnd/db"
 )
@@ -23,12 +22,6 @@ type CommentList struct {
 	Comments []db.Comment `json:"comments"` // 评论列表
 }
 
-var (
-	mutex     sync.RWMutex       // 读写锁保护共享数据
-	comments  []db.Comment          // 内存存储的评论列表
-	incrementID int = 1          // 自增ID计数器
-)
-
 // 发送统一格式的响应
 func sendResponse(w http.ResponseWriter, code int, msg string, data interface{}) {
 	w.Header().Set("Content-Type", "application/json")
@@ -79,16 +72,13 @@ func getCommentHandler(w http.ResponseWriter, r *http.Request) {
 		size = 10
 	}
 
-	mutex.RLock()         // 读锁定
-	defer mutex.RUnlock() // 函数返回时解锁
-
-	total := len(comments)
+	total := db.GetCommentCount()
 
 	// 返回所有评论
 	if size == -1 {
 		sendResponse(w, 0, "success", CommentList{
 			Total:    total,
-			Comments: comments,
+			Comments: db.GetComments(),
 		})
 		return
 	}
@@ -111,7 +101,7 @@ func getCommentHandler(w http.ResponseWriter, r *http.Request) {
 	// 返回分页数据
 	sendResponse(w, 0, "success", CommentList{
 		Total:    total,
-		Comments: comments[start:end],
+		Comments: db.GetCommentsSlice(start, end),
 	})
 }
 
@@ -152,22 +142,8 @@ func addCommentHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	mutex.Lock()         // 写锁定
-	defer mutex.Unlock() // 函数返回时解锁
-
-	// 创建新评论
-	newComment := db.Comment{
-		ID:      incrementID,
-		Name:    req.Name,
-		Content: req.Content,
-	}
-	incrementID++
-
-	// 添加到内存存储
-	comments = append(comments, newComment)
-
 	// 返回新创建的评论
-	sendResponse(w, 0, "Comment added", newComment)
+	sendResponse(w, 0, "Comment added", db.AddComment(req.Name, req.Content))
 }
 
 // 删除评论处理函数
@@ -199,19 +175,8 @@ func deleteCommentHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	mutex.Lock()         // 写锁定
-	defer mutex.Unlock() // 函数返回时解锁
-
 	// 查找并删除评论
-	found := false
-	for i, comment := range comments {
-		if comment.ID == id {
-			// 从切片中删除元素
-			comments = append(comments[:i], comments[i+1:]...)
-			found = true
-			break
-		}
-	}
+	found := db.DeleteComment(id)
 
 	if !found {
 		sendResponse(w, 6, "Comment not found", nil)
@@ -221,14 +186,8 @@ func deleteCommentHandler(w http.ResponseWriter, r *http.Request) {
 	sendResponse(w, 0, "Comment deleted", nil)
 }
 
-func main() {
-	// 初始化一些测试数据
-	comments = []db.Comment{
-		{ID: 1, Name: "Alice", Content: "First comment!"},
-		{ID: 2, Name: "Bob", Content: "Great work!"},
-	}
-	incrementID = 3
 
+func initServer() {
 	// 注册路由
 	http.HandleFunc("/comment/get", getCommentHandler)
 	http.HandleFunc("/comment/add", addCommentHandler)

db/Init.go

@@ -3,7 +3,7 @@ package db
 
 import (
         //"fmt"
-        //"log"
+        "log"
         //"gorm.io/driver/sqlite"
         "gorm.io/gorm"
 )
@@ -19,6 +19,19 @@ var (
 	//once sync.Once
 )
 
+func InitDB(dbPath string) {
+	//TODO
+	AddComment("Alice", "First comment!")
+	AddComment("Bob", "Great work!")
+
+	log.Println("Database initialized successfully.")
+}
+
+func CloseDB() {
+	//TODO
+	log.Println("Database closed successfully.")
+}
+
 /*
 
 func InitDB(dbPath string) {

db/Model.go

 package db
+
+import (
+	"sync"
+)
+
+var (
+	mutex     = &sync.RWMutex{}
+	comments  []Comment          // 内存存储的评论列表
+	incrementID int = 1          // 自增ID计数器
+)
+
+// GetComments 返回当前请求的评论列表
+func GetComments() []Comment {
+	mutex.RLock()
+	defer mutex.RUnlock()
+	return comments
+}
+
+func GetCommentsSlice(Begin int, End int) []Comment {
+	mutex.RLock()
+	defer mutex.RUnlock()
+	if Begin < 0 || End > len(comments) || Begin > End {
+		return []Comment{}
+	}
+	return comments[Begin:End]
+}
+
+func GetCommentCount() int {
+	mutex.RLock()
+	defer mutex.RUnlock()
+	return len(comments)
+}
+
+func AddComment(Name string, Content string) Comment {
+	mutex.Lock()
+	defer mutex.Unlock()
+
+	newComment := Comment{
+		ID:      incrementID,
+		Name:    Name,
+		Content: Content,
+	}
+	incrementID++
+	comments = append(comments, newComment)
+
+	return newComment
+}
+
+func DeleteComment(Id int) bool {
+	mutex.Lock()         // 写锁定
+	defer mutex.Unlock() // 函数返回时解锁
+
+	// 查找并删除评论
+	found := false
+	for i, comment := range comments {
+		if comment.ID == Id {
+			// 从切片中删除元素
+			comments = append(comments[:i], comments[i+1:]...)
+			found = true
+			break
+		}
+	}
+	return found
+}
\ No newline at end of file