GCTC-NTGC / TalentCloud

  RSAA,

  RSAAction,

  HTTPVerb,

  RequestError,

  ApiError,

  InternalError,

  getJSON,

} from "redux-api-middleware"; // RSAA = '@@redux-api-middleware/RSAA'

import dayjs from "dayjs";

import { ErrorAction } from "./createAction";

export const STARTED = "STARTED";

export const SUCCEEDED = "SUCCEEDED";

export const FAILED = "FAILED";

export interface StartedAction<T extends string, M> {

  type: T;

  meta: M;

  error?: boolean;

}

export interface SucceededAction<T extends string, P, M> {

  type: T;

  payload: P;

  meta: M;

  error?: boolean;

}

export interface FailedAction<T extends string, M = {}>

  extends ErrorAction<T, M> {

  type: T;

  payload: RequestError | ApiError | InternalError | Error; // TODO: remove normal error when all async actions using this

  meta: M;

  error: true;

}

/** The set of Flux Standard Actions which may result from an async request */

export type AsyncFsaActions<

  R extends string,

  S extends string,

  F extends string,

  P,

  M

> = StartedAction<R, M> | SucceededAction<S, P, M> | FailedAction<F, M>;

/** Internal definition, that doesn't quite represent final dispatched actions */

interface StartedActionCreator<T extends string, M> {

  type: T;

  meta: M;

}

/** Internal definition, that doesn't quite represent final dispatched actions */

interface SucceededActionCreator<T extends string, P, M> {

  type: T;

  payload: (action, state, res) => PromiseLike<P>;

  meta: M;

}

/** Internal definition, that doesn't quite represent final dispatched actions */

interface FailedActionCreator<T extends string, M> {

  type: T;

  meta: M;

}

/** A convenience type, for defining the return value of the rsa action generator. */

export type RSAActionTemplate<

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

> = RSAAction<

  TStarted,

  TSuccess,

  TFailed,

  PromiseLike<TPayload>,

  Error,

  {},

  TMeta,

  TMeta,

  TMeta,

  any

>;

// TODO: is this the best way to get this?

const csrfElement = document.head.querySelector('meta[name="csrf-token"]');

const csrfToken: string =

  csrfElement && csrfElement.getAttribute("content")

    ? (csrfElement.getAttribute("content") as string)

    : "";

/**

 *

 * @param endpoint

 * @param method

 * @param body

 * @param startedType

 * @param succeededType

 * @param failedType

 * @param parseResponse This function must accept the response body and return a payload.

 * @param metaData

 */

export const asyncAction = <

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

>(

  endpoint: string,

  method: HTTPVerb,

  body: object | string | null,

  startedType: TStarted,

  succeededType: TSuccess,

  failedType: TFailed,

  parseResponse: (response: any) => TPayload,

  metaData: TMeta,

): RSAActionTemplate<TStarted, TSuccess, TFailed, TPayload, TMeta> => {

  const basicHeaders = {

    "X-CSRF-TOKEN": csrfToken,

    Accept: "application/json",

  };

  const jsonBodyHeader = { "Content-Type": "application/json" }; // informs server that the body is a json encoded string

  const headers =

    body === null ? basicHeaders : { ...basicHeaders, ...jsonBodyHeader };

  let stringBody: string | null = null;

  if (body instanceof Object) {

    // We must stringify any object bodies, and ensure dates are formatted as server expects.

    stringBody = JSON.stringify(body, jsonDateReplacer);

  } else {

    stringBody = body;

  }

  return {

    [RSAA]: {

      endpoint,

      method,

      headers,

      ...(stringBody && { body: stringBody }),

      fetch, // Ensure the global fetch function is being used

      credentials: "include", // TODO: this may be removed when we change to token auth

      types: [

        {

          type: startedType,

          meta: metaData,

        },

        {

          type: succeededType,

          payload: (action, state, res: Response): PromiseLike<TPayload> =>

            getJSON(res).then(parseResponse),

          meta: metaData,

        },

        {

          type: failedType,

          meta: metaData,

        },

      ],

    },

  };

};

export const asyncGet = <

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

>(

  endpoint: string,

  startedType: TStarted,

  succeededType: TSuccess,

  failedType: TFailed,

  parseResponse: (response: any) => TPayload,

  metaData: TMeta,

): RSAActionTemplate<TStarted, TSuccess, TFailed, TPayload, TMeta> =>

  asyncAction(

    endpoint,

    "GET",

    null,

    startedType,

    succeededType,

    failedType,

    parseResponse,

    metaData,

  );

export const asyncPut = <

  TBody extends object | string,

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

>(

  endpoint: string,

  body: TBody,

  startedType: TStarted,

  succeededType: TSuccess,

  failedType: TFailed,

  parseResponse: (response: any) => TPayload,

  metaData: TMeta,

): RSAActionTemplate<TStarted, TSuccess, TFailed, TPayload, TMeta> =>

  asyncAction(

    endpoint,

    "PUT",

    body,

    startedType,

    succeededType,

    failedType,

    parseResponse,

    metaData,

  );

export const asyncPost = <

  TBody extends object | string,

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

>(

  endpoint: string,

  body: TBody,

  startedType: TStarted,

  succeededType: TSuccess,

  failedType: TFailed,

  parseResponse: (response: any) => TPayload,

  metaData: TMeta,

): RSAActionTemplate<TStarted, TSuccess, TFailed, TPayload, TMeta> =>

  asyncAction(

    endpoint,

    "POST",

    body,

    startedType,

    succeededType,

    failedType,

    parseResponse,

    metaData,

  );

export const asyncDelete = <

  TStarted extends string,

  TSuccess extends string,

  TFailed extends string,

  TPayload,

  TMeta

>(

  endpoint: string,

  startedType: TStarted,

  succeededType: TSuccess,

  failedType: TFailed,

  parseResponse: (response: any) => TPayload,

  metaData: TMeta,

): RSAActionTemplate<TStarted, TSuccess, TFailed, TPayload, TMeta> =>

  asyncAction(

    endpoint,

    "DELETE",

    null,

    startedType,

    succeededType,

    failedType,

    parseResponse,

    metaData,

  );

export default asyncAction;