feat: share CRUD with cascade delete

internal/store/shares.go

@@ -0,0 +1,67 @@
+package store
+
+import "database/sql"
+
+type Share struct {
+	ID             string
+	FileID         string
+	Token          string
+	PasswordHash   string
+	ExpiresAt      int64
+	CreatedAt      int64
+	LastAccessedAt int64
+}
+
+func (s *Store) ShareCreate(sh *Share) error {
+	_, err := s.db.Exec(
+		`INSERT INTO shares (id, file_id, token, password_hash, expires_at, created_at, last_accessed_at)
+		 VALUES (?, ?, ?, ?, ?, ?, ?)`,
+		sh.ID, sh.FileID, sh.Token, sh.PasswordHash, sh.ExpiresAt, sh.CreatedAt, sh.LastAccessedAt,
+	)
+	return err
+}
+
+func (s *Store) ShareGetByToken(token string) (*Share, error) {
+	row := s.db.QueryRow(
+		`SELECT id, file_id, token, password_hash, expires_at, created_at, last_accessed_at
+		 FROM shares WHERE token = ?`, token,
+	)
+	return scanShare(row)
+}
+
+func (s *Store) ShareList() ([]*Share, error) {
+	rows, err := s.db.Query(
+		`SELECT id, file_id, token, password_hash, expires_at, created_at, last_accessed_at
+		 FROM shares ORDER BY created_at DESC`,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var shares []*Share
+	for rows.Next() {
+		sh, err := scanShare(rows)
+		if err != nil {
+			return nil, err
+		}
+		shares = append(shares, sh)
+	}
+	return shares, rows.Err()
+}
+
+func (s *Store) ShareDelete(id string) error {
+	_, err := s.db.Exec(`DELETE FROM shares WHERE id = ?`, id)
+	return err
+}
+
+func scanShare(row interface {
+	Scan(dest ...any) error
+}) (*Share, error) {
+	sh := &Share{}
+	err := row.Scan(&sh.ID, &sh.FileID, &sh.Token, &sh.PasswordHash, &sh.ExpiresAt, &sh.CreatedAt, &sh.LastAccessedAt)
+	if err == sql.ErrNoRows {
+		return nil, err
+	}
+	return sh, err
+}

internal/store/shares_test.go

@@ -0,0 +1,70 @@
+package store
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestShareCreate(t *testing.T) {
+	dir := t.TempDir()
+	s, err := Open(filepath.Join(dir, "test.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer s.Close()
+
+	f := &File{
+		ID:           "file-1",
+		OriginalName: "doc.pdf",
+		StorageName:  "uuid-1",
+		Dir:          "inbox",
+		Size:         2048,
+		CreatedAt:    1750000000,
+	}
+	if err := s.FileCreate(f); err != nil {
+		t.Fatal(err)
+	}
+
+	share := &Share{
+		ID:        "share-1",
+		FileID:    "file-1",
+		Token:     "token-abc",
+		CreatedAt: 1750000000,
+	}
+
+	if err := s.ShareCreate(share); err != nil {
+		t.Fatalf("ShareCreate failed: %v", err)
+	}
+
+	got, err := s.ShareGetByToken("token-abc")
+	if err != nil {
+		t.Fatalf("ShareGetByToken failed: %v", err)
+	}
+	if got.FileID != "file-1" {
+		t.Errorf("FileID = %q, want %q", got.FileID, "file-1")
+	}
+}
+
+func TestFileDeleteCascadesShares(t *testing.T) {
+	dir := t.TempDir()
+	s, err := Open(filepath.Join(dir, "test.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer s.Close()
+
+	f := &File{ID: "file-2", OriginalName: "x.pdf", StorageName: "uuid-2", Dir: "inbox", Size: 100, CreatedAt: 1750000000}
+	s.FileCreate(f)
+
+	sh := &Share{ID: "share-2", FileID: "file-2", Token: "tok-2", CreatedAt: 1750000000}
+	s.ShareCreate(sh)
+
+	if err := s.FileDelete("file-2"); err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = s.ShareGetByToken("tok-2")
+	if err == nil {
+		t.Error("Share should be deleted after file deletion")
+	}
+}

internal/store/store.go

@@ -15,6 +15,11 @@ func Open(dbPath string) (*Store, error) {
 		return nil, err
 	}
 
+	if _, err := db.Exec("PRAGMA foreign_keys = ON"); err != nil {
+		db.Close()
+		return nil, err
+	}
+
 	if err := migrate(db); err != nil {
 		db.Close()
 		return nil, err