feat: initial commit

internal/store/comments.go

@@ -0,0 +1,70 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+) 
+
+type Comment struct {
+	ID        int64  `json:"id"`
+	PostID    int64  `json:"post_id"`
+	UserID    int64  `json:"user_id"`
+	Content   string `json:"content"`
+	CreatedAt string `json:"created_at"`
+	UpdatedAt string `json:"updated_at"`
+	User      User   `json:"user"`
+}
+
+type CommentStore struct {
+	db *sql.DB
+}
+
+func (s *CommentStore) Create(ctx context.Context, c *Comment) error {
+	query := `INSERT INTO comments (post_id, user_id, content) VALUES ($1, $2, $3) RETURNING id, created_at, updated_at;`
+	ctx, cancel := context.WithTimeout(ctx, QueryTimeout)
+	defer cancel()
+
+	err := s.db.QueryRowContext(ctx, query, c.PostID, c.UserID, c.Content).Scan(&c.ID, &c.CreatedAt, &c.UpdatedAt)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CommentStore) GetByPostID(ctx context.Context, postID int64) ([]Comment, error) {
+	query := `SELECT c.id, c.post_id, c.user_id, c.content, c.created_at, users.username, users.id  FROM comments c
+		JOIN users on c.user_id = users.id
+		WHERE c.post_id = $1 
+		ORDER BY c.created_at DESC;
+	`
+	ctx, cancel := context.WithTimeout(ctx, QueryTimeout)
+	defer cancel()
+
+	rows, err := s.db.QueryContext(ctx, query, postID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	comments := []Comment{}
+	for rows.Next() {
+		var comment Comment
+		comment.User = User{}
+		err := rows.Scan(
+			&comment.ID,
+			&comment.PostID,
+			&comment.UserID,
+			&comment.Content,
+			&comment.CreatedAt,
+			&comment.User.Username,
+			&comment.User.ID,
+		)
+		if err != nil {
+			return nil, err
+		}
+		comments = append(comments, comment)
+	}
+
+	return comments, nil
+}