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machine.js

const parallelApis = Machine({
  id: "Parallel-apis",
  type: "parallel",
  states: {
    userInfo: {
      initial: "apiCall",
      states: {
        apiCall: {
          on: {
            RESPONSE: "buildUserMap"
          }
        },
        buildUserMap: {
          type: "final"
        }
      }
    },
    patientInfo: {
      initial: "apiCall",
      states: {
        apiCall: {
          on: {
            RESPONSE: "buildPatientMap"
          }
        },
        buildPatientMap: {
          type: "final"
        }
      }
    },
    breakglassInfo: {
      initial: "apiCall",
      states: {
        apiCall: {
          on: {
            RESPONSE: "userList"
          }
        },
        userList: {
          type: "final"
        }
      }
    }
  }
});

const strategyMachine = Machine({
  id: "Worklist-Search",
  initial: "ui",
  states: {
    ui: {
      on: {
        GET_TODOS: "fetchTodosLoop"
      }
    },
    fetchTodosLoop: {
      on: {
        NON_EMPTY_LIST: "referrals",
        EMPTY_LIST: "sendResponse"
      }
    },
    referrals: {
      on: {
        GET_SENT_REFERRALS: "getExternalInformation"
      }
    },
    getExternalInformation: {
      on: {
        GET_INFO: "state1"
      },
      ...parallelApis
    },
    state1: {
      on: {
        MISSING_INFORMATION: "logger",
        ELSE: "checkBreakglass"
      }
    },
    logger: {
      on: {
        LOG_INFO: "checkBreakglass"
      }
    },
    checkBreakglass: {
      on: {
        ALLOWED_EMPI: "addPatient",
        CAN_BREAK_GLASS: "addPatient",
        CANNOT_BREAKGLASS: "maskPatient"
      }
    },
    maskPatient: {
      on: {
        MASK_PATIENT: "addPatient"
      }
    },
    addPatient: {
      on: {
        ADD_PATIENT_TO_RESPONSE: "checkResponseLimit"
      }
    },
    checkResponseLimit: {
      on: {
        LEN_RESPONSE_LT_LIMIT: "fetchTodosLoop",
        LEN_RESPONSE_GTE_LIMIT: "sendResponse"
      }
    },
    sendResponse: {
      type: "final"
    }
  }
});