init:搭建了整个项目的框架，初步写好了用户系统

internal/handler/user.go

@@ -0,0 +1,86 @@
+package handler
+
+import (
+	"feedsystem_video_go/internal/api"
+	"feedsystem_video_go/internal/model"
+	"feedsystem_video_go/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+type UserHandler struct {
+	userService *service.UserService
+}
+
+func NewUserHandler(userService *service.UserService) *UserHandler {
+	return &UserHandler{userService: userService}
+}
+func (h *UserHandler) CreateUser(c *gin.Context) {
+	var req api.CreateUserRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if err := h.userService.CreateUser(&model.User{
+		Username: req.Username,
+		Password: req.Password,
+	}); err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(200, gin.H{"message": "user created"})
+}
+
+func (h *UserHandler) RenameByID(c *gin.Context) {
+	var req api.RenameByIDRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if err := h.userService.RenameByID(req.ID, req.NewUsername); err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(200, gin.H{"message": "user renamed"})
+}
+
+func (h *UserHandler) ChangePassword(c *gin.Context) {
+	var req api.ChangePasswordRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if err := h.userService.ChangePassword(req.ID, req.NewPassword); err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(200, gin.H{"message": "password changed"})
+}
+
+func (h *UserHandler) FindByID(c *gin.Context) {
+	var req api.FindByIDRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if user, err := h.userService.FindByID(req.ID); err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	} else {
+		c.JSON(200, user)
+	}
+}
+
+func (h *UserHandler) FindByUsername(c *gin.Context) {
+	var req api.FindByUsernameRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if user, err := h.userService.FindByUsername(req.Username); err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	} else {
+		c.JSON(200, user)
+	}
+}