@mui/x-data-grid/hooks/features/rows/useGridRowsPreProcessors.js

The Community plan edition of the Data Grid components (MUI X).

import _extends from "@babel/runtime/helpers/esm/extends";
import { GRID_DEFAULT_STRATEGY, useGridRegisterStrategyProcessor } from '../../core/strategyProcessing';
import { buildRootGroup, GRID_ROOT_GROUP_ID } from './gridRowsUtils';
const createFlatRowTree = rows => {
  const tree = {
    [GRID_ROOT_GROUP_ID]: _extends({}, buildRootGroup(), {
      children: rows
    })
  };
  for (let i = 0; i < rows.length; i += 1) {
    const rowId = rows[i];
    tree[rowId] = {
      id: rowId,
      depth: 0,
      parent: GRID_ROOT_GROUP_ID,
      type: 'leaf',
      groupingKey: null
    };
  }
  return {
    groupingName: GRID_DEFAULT_STRATEGY,
    tree,
    treeDepths: {
      0: rows.length
    },
    dataRowIds: rows
  };
};
const updateFlatRowTree = ({
  previousTree,
  actions
}) => {
  const tree = _extends({}, previousTree);
  const idsToRemoveFromRootGroup = {};
  for (let i = 0; i < actions.remove.length; i += 1) {
    const idToDelete = actions.remove[i];
    idsToRemoveFromRootGroup[idToDelete] = true;
    delete tree[idToDelete];
  }
  for (let i = 0; i < actions.insert.length; i += 1) {
    const idToInsert = actions.insert[i];
    tree[idToInsert] = {
      id: idToInsert,
      depth: 0,
      parent: GRID_ROOT_GROUP_ID,
      type: 'leaf',
      groupingKey: null
    };
  }

  // TODO rows v6: Support row unpinning

  const rootGroup = tree[GRID_ROOT_GROUP_ID];
  let rootGroupChildren = [...rootGroup.children, ...actions.insert];
  if (Object.values(idsToRemoveFromRootGroup).length) {
    rootGroupChildren = rootGroupChildren.filter(id => !idsToRemoveFromRootGroup[id]);
  }
  tree[GRID_ROOT_GROUP_ID] = _extends({}, rootGroup, {
    children: rootGroupChildren
  });
  return {
    groupingName: GRID_DEFAULT_STRATEGY,
    tree,
    treeDepths: {
      0: rootGroupChildren.length
    },
    dataRowIds: rootGroupChildren
  };
};
const flatRowTreeCreationMethod = params => {
  if (params.updates.type === 'full') {
    return createFlatRowTree(params.updates.rows);
  }
  return updateFlatRowTree({
    previousTree: params.previousTree,
    actions: params.updates.actions
  });
};
export const useGridRowsPreProcessors = apiRef => {
  useGridRegisterStrategyProcessor(apiRef, GRID_DEFAULT_STRATEGY, 'rowTreeCreation', flatRowTreeCreationMethod);
};