wip add flat list selector

packages/block-editor/src/store/selectors.js

@@ -2230,6 +2230,38 @@ export const __experimentalGetActiveBlockIdByBlockNames = createSelector(
  ]
 );
 
+/**
+ * Flat representation of blocks. This is useful when rendering the list view.
+ */
+export const __experimentalGetFlatList = createSelector(
+ ( state, withoutIds = [], parentId = '', level = 0 ) => {
+ let skipModifier = 0;
+ return getBlockOrder( state, parentId ).reduce(
+ ( list, clientId, index ) => {
+ if ( withoutIds.indexOf( clientId ) !== -1 ) {
+ skipModifier++;
+ return list;
+ }
+ return list.concat( [
+ { clientId, level, parentId, index: index - skipModifier },
+ ...__experimentalGetFlatList(
+ state,
+ withoutIds,
+ clientId,
+ level + 1
+ ),
+ ] );
+ },
+ []
+ );
+ },
+ ( state, parentId, withoutIds ) => [
+ state.blocks.order,
+ parentId,
+ withoutIds,
+ ]
+);
+
 /**
  * Tells if the block with the passed clientId was just inserted.
  *