feat(backend): add domain store, learning services, and seed data

Persist LMS entities and implement hearts/watch rules plus curriculum bootstrap.
2026-10-07 19:40:26 +03:30
parent f76c7a110b
commit 3ee609337c
15 changed files with 4076 additions and 0 deletions
@@ -0,0 +1,135 @@
+package store
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+
+	"pargar/backend/internal/models"
+)
+
+func (s *Store) CreateChallenge(ctx context.Context, c *models.Challenge) (int64, error) {
+	err := s.pool.QueryRow(ctx, `
+		INSERT INTO challenges (title, description, target_xp, starts_at, ends_at, is_active, created_by)
+		VALUES ($1,$2,$3,$4,$5,$6,$7) RETURNING id, created_at`,
+		c.Title, c.Description, c.TargetXP, c.StartsAt, c.EndsAt, c.IsActive, c.CreatedBy,
+	).Scan(&c.ID, &c.CreatedAt)
+	return c.ID, err
+}
+
+func (s *Store) UpdateChallenge(ctx context.Context, id int64, c *models.Challenge) error {
+	tag, err := s.pool.Exec(ctx, `
+		UPDATE challenges SET title=$1, description=$2, target_xp=$3, starts_at=$4, ends_at=$5, is_active=$6
+		WHERE id=$7`,
+		c.Title, c.Description, c.TargetXP, c.StartsAt, c.EndsAt, c.IsActive, id)
+	if err != nil {
+		return err
+	}
+	if tag.RowsAffected() == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+func (s *Store) DeleteChallenge(ctx context.Context, id int64) error {
+	tag, err := s.pool.Exec(ctx, `DELETE FROM challenges WHERE id=$1`, id)
+	if err != nil {
+		return err
+	}
+	if tag.RowsAffected() == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+func (s *Store) ListChallengesAdmin(ctx context.Context) ([]models.Challenge, error) {
+	rows, err := s.pool.Query(ctx, `
+		SELECT id, title, description, target_xp, starts_at, ends_at, is_active, created_at
+		FROM challenges ORDER BY starts_at DESC LIMIT 200`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanChallenges(rows)
+}
+
+// ListActiveChallengesForUser returns challenges currently in window (active + now in range) with progress.
+func (s *Store) ListActiveChallengesForUser(ctx context.Context, userID int64) ([]models.Challenge, error) {
+	rows, err := s.pool.Query(ctx, `
+		SELECT c.id, c.title, c.description, c.target_xp, c.starts_at, c.ends_at, c.is_active, c.created_at,
+			COALESCE(p.xp, 0) AS my_xp
+		FROM challenges c
+		LEFT JOIN challenge_progress p ON p.challenge_id = c.id AND p.user_id = $1
+		WHERE c.is_active AND c.starts_at <= now() AND c.ends_at >= now()
+		ORDER BY c.ends_at ASC`, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []models.Challenge
+	for rows.Next() {
+		var c models.Challenge
+		if err := rows.Scan(&c.ID, &c.Title, &c.Description, &c.TargetXP, &c.StartsAt, &c.EndsAt, &c.IsActive, &c.CreatedAt, &c.MyXP); err != nil {
+			return nil, err
+		}
+		c.Completed = c.MyXP >= c.TargetXP
+		out = append(out, c)
+	}
+	if out == nil {
+		out = []models.Challenge{}
+	}
+	return out, rows.Err()
+}
+
+// AddChallengeProgress adds XP toward all active challenges in the current window.
+func (s *Store) AddChallengeProgress(ctx context.Context, userID int64, amount int) error {
+	if amount <= 0 {
+		return nil
+	}
+	_, err := s.pool.Exec(ctx, `
+		INSERT INTO challenge_progress (challenge_id, user_id, xp, updated_at)
+		SELECT c.id, $1, $2, now()
+		FROM challenges c
+		WHERE c.is_active AND c.starts_at <= now() AND c.ends_at >= now()
+		ON CONFLICT (challenge_id, user_id) DO UPDATE
+		SET xp = challenge_progress.xp + EXCLUDED.xp,
+		    updated_at = now()`, userID, amount)
+	return err
+}
+
+func scanChallenges(rows pgx.Rows) ([]models.Challenge, error) {
+	var out []models.Challenge
+	for rows.Next() {
+		var c models.Challenge
+		if err := rows.Scan(&c.ID, &c.Title, &c.Description, &c.TargetXP, &c.StartsAt, &c.EndsAt, &c.IsActive, &c.CreatedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, c)
+	}
+	if out == nil {
+		out = []models.Challenge{}
+	}
+	return out, rows.Err()
+}
+
+func (s *Store) GetChallenge(ctx context.Context, id int64) (*models.Challenge, error) {
+	row := s.pool.QueryRow(ctx, `
+		SELECT id, title, description, target_xp, starts_at, ends_at, is_active, created_at
+		FROM challenges WHERE id=$1`, id)
+	var c models.Challenge
+	err := row.Scan(&c.ID, &c.Title, &c.Description, &c.TargetXP, &c.StartsAt, &c.EndsAt, &c.IsActive, &c.CreatedAt)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return nil, ErrNotFound
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &c, nil
+}
+
+// ChallengeWindowOK is a small helper for tests / validation.
+func ChallengeWindowOK(starts, ends time.Time) bool {
+	return !starts.IsZero() && !ends.IsZero() && !ends.Before(starts)
+}