feat: add user centric features

internal/repository/bookmark_repo.go

@@ -0,0 +1,96 @@
+package repository
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/prabhupadasays/spsays-bff/internal/model"
+)
+
+var ErrBookmarkNotFound = errors.New("bookmark not found")
+var ErrBookmarkExists = errors.New("bookmark already exists for this URL")
+
+type BookmarkRepo struct{ pg *Postgres }
+
+func NewBookmarkRepo(pg *Postgres) *BookmarkRepo { return &BookmarkRepo{pg: pg} }
+
+// Create inserts a new bookmark. ErrBookmarkExists on (user_id, source_url) collision.
+func (r *BookmarkRepo) Create(ctx context.Context, userID, sourceURL, sourceTitle string, excerpt, note *string) (*model.Bookmark, error) {
+	b := &model.Bookmark{}
+	err := r.pg.Pool.QueryRow(ctx, `
+		INSERT INTO bookmarks (user_id, source_url, source_title, excerpt, note)
+		VALUES ($1, $2, $3, $4, $5)
+		RETURNING id, user_id, source_url, COALESCE(source_title, ''), excerpt, note, created_at`,
+		userID, sourceURL, sourceTitle, excerpt, note,
+	).Scan(&b.ID, &b.UserID, &b.SourceURL, &b.SourceTitle, &b.Excerpt, &b.Note, &b.CreatedAt)
+	if err != nil {
+		if strings.Contains(err.Error(), "23505") {
+			return nil, ErrBookmarkExists
+		}
+		return nil, fmt.Errorf("create bookmark: %w", err)
+	}
+	return b, nil
+}
+
+// ListByUser returns all bookmarks for the caller, newest first.
+func (r *BookmarkRepo) ListByUser(ctx context.Context, userID string) ([]model.Bookmark, error) {
+	rows, err := r.pg.Pool.Query(ctx, `
+		SELECT id, user_id, source_url, COALESCE(source_title, ''), excerpt, note, created_at
+		FROM bookmarks WHERE user_id = $1 ORDER BY created_at DESC`, userID)
+	if err != nil {
+		return nil, fmt.Errorf("query bookmarks: %w", err)
+	}
+	defer rows.Close()
+	out := []model.Bookmark{}
+	for rows.Next() {
+		var b model.Bookmark
+		if err := rows.Scan(&b.ID, &b.UserID, &b.SourceURL, &b.SourceTitle,
+			&b.Excerpt, &b.Note, &b.CreatedAt); err != nil {
+			return nil, fmt.Errorf("scan bookmark: %w", err)
+		}
+		out = append(out, b)
+	}
+	return out, rows.Err()
+}
+
+// CountByUser is used by the plan-limit enforcer.
+func (r *BookmarkRepo) CountByUser(ctx context.Context, userID string) (int, error) {
+	var n int
+	err := r.pg.Pool.QueryRow(ctx, `SELECT COUNT(*) FROM bookmarks WHERE user_id = $1`, userID).Scan(&n)
+	if err != nil {
+		return 0, fmt.Errorf("count bookmarks: %w", err)
+	}
+	return n, nil
+}
+
+// Delete removes a bookmark belonging to the caller.
+func (r *BookmarkRepo) Delete(ctx context.Context, id, userID string) error {
+	tag, err := r.pg.Pool.Exec(ctx,
+		`DELETE FROM bookmarks WHERE id = $1 AND user_id = $2`, id, userID)
+	if err != nil {
+		return fmt.Errorf("delete bookmark: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return ErrBookmarkNotFound
+	}
+	return nil
+}
+
+// FindByID returns one bookmark (used for the owner-check path).
+func (r *BookmarkRepo) FindByID(ctx context.Context, id string) (*model.Bookmark, error) {
+	b := &model.Bookmark{}
+	err := r.pg.Pool.QueryRow(ctx, `
+		SELECT id, user_id, source_url, COALESCE(source_title, ''), excerpt, note, created_at
+		FROM bookmarks WHERE id = $1`, id,
+	).Scan(&b.ID, &b.UserID, &b.SourceURL, &b.SourceTitle, &b.Excerpt, &b.Note, &b.CreatedAt)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			return nil, ErrBookmarkNotFound
+		}
+		return nil, fmt.Errorf("find bookmark: %w", err)
+	}
+	return b, nil
+}