feat(editor): type safe draft model and transformer (#10486)

blocksuite/affine/shared/src/adapters/middlewares/copy.ts

@@ -1,4 +1,4 @@
-import { RootBlockModel } from '@blocksuite/affine-model';
+import type { RootBlockModel } from '@blocksuite/affine-model';
 import {
   type BlockStdScope,
   type EditorHost,
@@ -12,7 +12,9 @@ import type {
   TransformerSlots,
 } from '@blocksuite/store';
 
-import { matchModels } from '../../utils';
+const isRootDraftModel = (
+  model: DraftModel
+): model is DraftModel<RootBlockModel> => model.flavour === 'affine:root';
 
 const handlePoint = (
   point: TextRangePoint,
@@ -20,7 +22,7 @@ const handlePoint = (
   model: DraftModel
 ) => {
   const { index, length } = point;
-  if (matchModels(model, [RootBlockModel])) {
+  if (isRootDraftModel(model)) {
     if (length === 0) return;
     (snapshot.props.title as Record<string, unknown>).delta =
       model.title.sliceToDelta(index, length + index);

blocksuite/affine/shared/src/utils/model/checker.ts

@@ -11,7 +11,7 @@ type ModelList<T> =
 export function matchModels<
   const Model extends ConstructorType<BlockModel>[],
   U extends ModelList<Model>[number] = ModelList<Model>[number],
->(model: unknown, expected: Model): model is U {
+>(model: BlockModel | null, expected: Model): model is U {
   return (
     !!model && expected.some(expectedModel => model instanceof expectedModel)
   );