feat: add get posts in repo

repositories/posts_repository.go

@@ -12,9 +12,48 @@ type PostsRepository struct{}
 var Posts PostsRepository
 
 func (r *PostsRepository) Get(limit, offset int) ([]Post, error) {
+	if Db.Pool == nil {
 		return PostsDb, nil
 	}
 
+	sql := `
+		SELECT id, title, text, created_at
+		FROM posts
+		WHERE
+			is_parent = true
+			AND is_deleted = false
+		ORDER BY updated_at DESC
+		LIMIT $1
+	`
+
+	conn, err := Db.Pool.Acquire(context.TODO())
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Release()
+
+	rows, err := conn.Query(context.TODO(), sql, limit)
+	if err != nil {
+		return nil, err
+	}
+	if rows.Err() != nil {
+		return nil, err
+	}
+
+	var posts []Post
+	for rows.Next() {
+		var post Post
+		err = rows.Scan(&post.ID, &post.Title, &post.Text, &post.CreatedAt)
+		if err != nil {
+			return nil, err
+		}
+
+		posts = append(posts, post)
+	}
+
+	return posts, nil
+}
+
 func (r *PostsRepository) Create(p Post) (int, error) {
 	sql := `
 		INSERT INTO posts (is_parent, parent_id, title, text, is_sage)