Add comment functionality.

server/dao/comment.go

@@ -0,0 +1,30 @@
+package dao
+
+import "nysoure/server/model"
+
+func CreateComment(content string, userID uint, resourceID uint) (model.Comment, error) {
+	c := model.Comment{
+		Content:    content,
+		UserID:     userID,
+		ResourceID: resourceID,
+	}
+	err := db.Save(&c).Error
+	return c, err
+}
+
+func GetCommentByResourceID(resourceID uint, page, pageSize int) ([]model.Comment, int, error) {
+	var comments []model.Comment
+	var total int64
+
+	if err := db.Model(&model.Comment{}).Where("resource_id = ?", resourceID).Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	if err := db.Where("resource_id = ?", resourceID).Offset((page - 1) * pageSize).Limit(pageSize).Preload("User").Order("created_at DESC").Find(&comments).Error; err != nil {
+		return nil, 0, err
+	}
+
+	totalPages := (int(total) + pageSize - 1) / pageSize
+
+	return comments, totalPages, nil
+}