added user signup feature

internal/api/routes.go

@@ -20,15 +20,47 @@ func PostBookHandler(c *gin.Context, db *gorm.DB) {
 	var book bookPostCreate
 	err := c.ShouldBindJSON(&book)
 	if err != nil {
-		var ve validator.ValidationErrors
-		if errors.As(err, &ve) {
-			c.JSON(http.StatusBadRequest, getValidationErrors(&ve))
-		} else {
-			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
-		}
+		manageBindingError(c, err)
 		return
 	}
 	bookDb := book.toBook()
-	db.Model(&model.Book{}).Save(&bookDb)
+	err = db.Model(&model.Book{}).Save(&bookDb).Error
+	if err != nil {
+		manageDefaultError(c, err)
+		return
+	}
 	c.String(200, "Success")
 }
+
+func PostUserHandler(c *gin.Context, db *gorm.DB) {
+	var user userPostCreate
+	err := c.ShouldBindJSON(&user)
+	if err != nil {
+		manageBindingError(c, err)
+		return
+	}
+	userDb, err := user.toUser()
+	if err != nil {
+		manageDefaultError(c, err)
+		return
+	}
+	err = db.Model(&model.User{}).Save(&userDb).Error
+	if err != nil {
+		manageDefaultError(c, err)
+		return
+	}
+	c.String(200, "Success")
+}
+
+func manageBindingError(c *gin.Context, err error) {
+	var ve validator.ValidationErrors
+	if errors.As(err, &ve) {
+		c.JSON(http.StatusBadRequest, getValidationErrors(&ve))
+	} else {
+		manageDefaultError(c, err)
+	}
+}
+
+func manageDefaultError(c *gin.Context, err error) {
+	c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+}