@ledgerhq/live-common/src/notifications/ServiceStatusProvider/machine.ts

Common ground for the Ledger Live apps

import { assign, createMachine } from "xstate";
import type { State } from "./types";
const initialState: State = {
  incidents: [],
  error: null,
  lastUpdateTime: null,
  isLoading: false,
  context: { tickers: [] },
};
export const serviceStatusMachine = createMachine({
  id: "serviceStatus",
  initial: "updating",
  context: initialState,
  states: {
    idle: {
      after: {
        AUTO_UPDATE_DELAY: {
          target: "updating",
        },
      },
      on: {
        UPDATE_DATA: {
          target: "updating",
          actions: assign({
            isLoading: true,
            error: null,
          }),
        },
      },
    },
    updating: {
      invoke: {
        src: "fetchData",
        onDone: {
          target: "idle",
          actions: assign(({ event }) => {
            const { incidents, updateTime } = event.output;
            return {
              incidents,
              lastUpdateTime: updateTime,
              isLoading: false,
              error: null,
            };
          }),
        },
        onError: {
          target: "idle",
          actions: assign(({ event }) => ({
            error: event.error as Error,
          })),
        },
      },
    },
  },
});