AFFiNE-Mirror/blocksuite/affine/shared/src/utils/computing.ts

import groupBy from 'lodash-es/groupBy';
import maxBy from 'lodash-es/maxBy';

export function getMostCommonValue<T, F extends keyof T>(
  records: T[],
  field: F
) {
  const grouped = groupBy(records, record => record[field]);
  const values = Object.values(grouped);
  const record = maxBy(values, records => records.length)?.[0];
  return record?.[field];
}

export function getMostCommonResolvedValue<T, F extends keyof T, U>(
  records: T[],
  field: F,
  resolve: (value: T[F]) => U
) {
  return getMostCommonValue(
    records.map(record => ({ [field]: resolve(record[field]) })),
    String(field)
  );
}