gengitkan/client/src/store/selectors/boards.ts

export function selectBoardByUserProjects(boardsByID: any, projectsByName: any) {
  const userProjects = Object.keys(projectsByName);
  return Object.keys(boardsByID).reduce((filteredBoardsByID: any, boardID: string) => {
    const board = boardsByID[boardID];
    const hasProject = board.projects.length === 0 || board.projects.some((p: any) => userProjects.indexOf(p) !== -1);
    if (hasProject) {
      filteredBoardsByID[boardID] = board;
    }
    return filteredBoardsByID;
  }, {});
}