asl-validator/src/checks/get-states.ts

Amazon States Language validator

import { State, StateMachine, States } from "../types";
import { JSONPath } from "jsonpath-plus";

export const getStatesContainer = (definition: StateMachine): States[] => {
  return JSONPath<States[]>({
    json: definition,
    path: "$..['States']",
  });
};

export type StateEntry = { stateName: string; state: State & { Type: string } };
export type StateFilter = (entry: StateEntry) => boolean;

export const getStates = (states: States): Array<StateEntry> => {
  return Object.keys(states)
    .map((stateName) => {
      const state = states[stateName];
      return { stateName, state };
    })
    .filter(({ state }) => {
      // the schemas will validate if this Type field is valid.
      return "Type" in state;
    })
    .map(({ state, stateName }) => {
      return { stateName, state: state as State & { Type: string } };
    });
};