feat: share CRUD with cascade delete

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")
+	}
+}