opencode: delete method for stacks

backend/models/image.go

@@ -38,7 +38,7 @@ type UserProcessingImage struct {
 func (m ImageModel) Process(ctx context.Context, userId uuid.UUID, image model.Image) (model.UserImagesToProcess, error) {
 	tx, err := m.dbPool.BeginTx(ctx, nil)
 	if err != nil {
-		return model.UserImagesToProcess{}, fmt.Errorf("Failed to begin transaction", err)
+		return model.UserImagesToProcess{}, fmt.Errorf("Failed to begin transaction: %w", err)
 	}
 
 	insertImageStmt := Image.
@@ -49,7 +49,7 @@ func (m ImageModel) Process(ctx context.Context, userId uuid.UUID, image model.I
 	insertedImage := model.Image{}
 	err = insertImageStmt.QueryContext(ctx, tx, &insertedImage)
 	if err != nil {
-		return model.UserImagesToProcess{}, fmt.Errorf("Could not insert/query new image. SQL %s.", insertImageStmt.DebugSql(), err)
+		return model.UserImagesToProcess{}, fmt.Errorf("Could not insert/query new image. SQL %s: %w", insertImageStmt.DebugSql(), err)
 	}
 
 	stmt := UserImagesToProcess.
@@ -60,7 +60,7 @@ func (m ImageModel) Process(ctx context.Context, userId uuid.UUID, image model.I
 	userImage := model.UserImagesToProcess{}
 	err = stmt.QueryContext(ctx, tx, &userImage)
 	if err != nil {
-		return model.UserImagesToProcess{}, fmt.Errorf("Could not insert user_image", err)
+		return model.UserImagesToProcess{}, fmt.Errorf("Could not insert user_image: %w", err)
 	}
 
 	err = tx.Commit()

backend/models/lists.go

@@ -247,6 +247,64 @@ func (m ListModel) SaveProcessing(ctx context.Context, userID uuid.UUID, title s
 	return err
 }
 
+// ========================================
+// DELETE methods
+// ========================================
+
+func (m ListModel) Delete(ctx context.Context, listID uuid.UUID, userID uuid.UUID) error {
+	// First verify the list belongs to the user
+	checkOwnershipStmt := Lists.
+		SELECT(Lists.ID).
+		WHERE(Lists.ID.EQ(UUID(listID)).AND(Lists.UserID.EQ(UUID(userID))))
+
+	var existingList model.Lists
+	err := checkOwnershipStmt.QueryContext(ctx, m.dbPool, &existingList)
+	if err != nil {
+		return fmt.Errorf("could not verify list ownership: %w", err)
+	}
+
+	// Start a transaction to ensure all deletions happen atomically
+	tx, err := m.dbPool.BeginTx(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("could not start transaction: %w", err)
+	}
+	defer tx.Rollback()
+
+	// Delete in reverse order of dependencies:
+	// 1. Delete schema items first
+	deleteSchemaItemsStmt := SchemaItems.DELETE().
+		WHERE(SchemaItems.SchemaID.IN(
+			Schemas.SELECT(Schemas.ID).
+				WHERE(Schemas.ListID.EQ(UUID(listID))),
+		))
+	_, err = deleteSchemaItemsStmt.ExecContext(ctx, tx)
+	if err != nil {
+		return fmt.Errorf("could not delete schema items: %w", err)
+	}
+
+	// 2. Delete schemas
+	deleteSchemasStmt := Schemas.DELETE().WHERE(Schemas.ListID.EQ(UUID(listID)))
+	_, err = deleteSchemasStmt.ExecContext(ctx, tx)
+	if err != nil {
+		return fmt.Errorf("could not delete schemas: %w", err)
+	}
+
+	// 3. Delete the list itself
+	deleteListStmt := Lists.DELETE().WHERE(Lists.ID.EQ(UUID(listID)))
+	_, err = deleteListStmt.ExecContext(ctx, tx)
+	if err != nil {
+		return fmt.Errorf("could not delete list: %w", err)
+	}
+
+	// Commit the transaction
+	err = tx.Commit()
+	if err != nil {
+		return fmt.Errorf("could not commit transaction: %w", err)
+	}
+
+	return nil
+}
+
 func NewListModel(db *sql.DB) ListModel {
 	return ListModel{dbPool: db}
 }