src/store/data-explorer/data-explorer-middleware.ts

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 import { Dispatch } from 'redux';
   6 import { RootState } from 'store/store';
   7 import { ServiceRepository } from 'services/services';
   8 import { Middleware } from 'redux';
   9 import {
  10     dataExplorerActions,
  11     bindDataExplorerActions,
  12     DataTableRequestState,
  13 } from './data-explorer-action';
  14 import { getDataExplorer } from './data-explorer-reducer';
  15 import { DataExplorerMiddlewareService } from './data-explorer-middleware-service';
  16
  17 export const dataExplorerMiddleware =
  18     (service: DataExplorerMiddlewareService): Middleware =>
  19     (api) =>
  20     (next) => {
  21         const actions = bindDataExplorerActions(service.getId());
  22
  23         return (action) => {
  24             const handleAction =
  25                 <T extends { id: string }>(handler: (data: T) => void) =>
  26                     (data: T) => {
  27                         next(action);
  28                         if (data.id === service.getId()) {
  29                             handler(data);
  30                         }
  31                     };
  32             dataExplorerActions.match(action, {
  33                 SET_PAGE: handleAction(() => {
  34                     api.dispatch(actions.REQUEST_ITEMS(false));
  35                 }),
  36                 SET_ROWS_PER_PAGE: handleAction(() => {
  37                     api.dispatch(actions.REQUEST_ITEMS(true));
  38                 }),
  39                 SET_FILTERS: handleAction(() => {
  40                     api.dispatch(actions.RESET_PAGINATION());
  41                     api.dispatch(actions.REQUEST_ITEMS(true));
  42                 }),
  43                 TOGGLE_SORT: handleAction(() => {
  44                     api.dispatch(actions.REQUEST_ITEMS(true));
  45                 }),
  46                 SET_EXPLORER_SEARCH_VALUE: handleAction(() => {
  47                     api.dispatch(actions.RESET_PAGINATION());
  48                     api.dispatch(actions.REQUEST_ITEMS(true));
  49                 }),
  50                 REQUEST_ITEMS: handleAction(({ criteriaChanged }) => {
  51                     api.dispatch<any>(async (
  52                         dispatch: Dispatch,
  53                         getState: () => RootState,
  54                         services: ServiceRepository
  55                     ) => {
  56                         while (true) {
  57                             let de = getDataExplorer(
  58                                 getState().dataExplorer,
  59                                 service.getId()
  60                             );
  61                             switch (de.requestState) {
  62                                 case DataTableRequestState.IDLE:
  63                                     // Start a new request.
  64                                     try {
  65                                         dispatch(
  66                                             actions.SET_REQUEST_STATE({
  67                                                 requestState: DataTableRequestState.PENDING,
  68                                             })
  69                                         );
  70                                         await service.requestItems(api, criteriaChanged);
  71                                     } catch {
  72                                         dispatch(
  73                                             actions.SET_REQUEST_STATE({
  74                                                 requestState: DataTableRequestState.NEED_REFRESH,
  75                                             })
  76                                         );
  77                                     }
  78                                     // Now check if the state is still PENDING, if it moved to NEED_REFRESH
  79                                     // then we need to reissue requestItems
  80                                     de = getDataExplorer(
  81                                         getState().dataExplorer,
  82                                         service.getId()
  83                                     );
  84                                     const complete =
  85                                         de.requestState === DataTableRequestState.PENDING;
  86                                     dispatch(
  87                                         actions.SET_REQUEST_STATE({
  88                                             requestState: DataTableRequestState.IDLE,
  89                                         })
  90                                     );
  91                                     if (complete) {
  92                                         return;
  93                                     }
  94                                     break;
  95                                 case DataTableRequestState.PENDING:
  96                                     // State is PENDING, move it to NEED_REFRESH so that when the current request finishes it starts a new one.
  97                                     dispatch(
  98                                         actions.SET_REQUEST_STATE({
  99                                             requestState: DataTableRequestState.NEED_REFRESH,
 100                                         })
 101                                     );
 102                                     return;
 103                                 case DataTableRequestState.NEED_REFRESH:
 104                                     // Nothing to do right now.
 105                                     return;
 106                             }
 107                         }
 108                     });
 109                 }),
 110                 default: () => next(action),
 111             });
 112         };
 113     };