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>(
  52             async (
  53               dispatch: Dispatch,
  54               getState: () => RootState,
  55               services: ServiceRepository
  56             ) => {
  57               while (true) {
  58                 let de = getDataExplorer(
  59                   getState().dataExplorer,
  60                   service.getId()
  61                 );
  62                 switch (de.requestState) {
  63                   case DataTableRequestState.IDLE:
  64                     // Start a new request.
  65                     try {
  66                       dispatch(
  67                         actions.SET_REQUEST_STATE({
  68                           requestState: DataTableRequestState.PENDING,
  69                         })
  70                       );
  71                       await service.requestItems(api, criteriaChanged);
  72                     } catch {
  73                       dispatch(
  74                         actions.SET_REQUEST_STATE({
  75                           requestState: DataTableRequestState.NEED_REFRESH,
  76                         })
  77                       );
  78                     }
  79                     // Now check if the state is still PENDING, if it moved to NEED_REFRESH
  80                     // then we need to reissue requestItems
  81                     de = getDataExplorer(
  82                       getState().dataExplorer,
  83                       service.getId()
  84                     );
  85                     const complete =
  86                       de.requestState === DataTableRequestState.PENDING;
  87                     dispatch(
  88                       actions.SET_REQUEST_STATE({
  89                         requestState: DataTableRequestState.IDLE,
  90                       })
  91                     );
  92                     if (complete) {
  93                       return;
  94                     }
  95                     break;
  96                   case DataTableRequestState.PENDING:
  97                     // State is PENDING, move it to NEED_REFRESH so that when the current request finishes it starts a new one.
  98                     dispatch(
  99                       actions.SET_REQUEST_STATE({
 100                         requestState: DataTableRequestState.NEED_REFRESH,
 101                       })
 102                     );
 103                     return;
 104                   case DataTableRequestState.NEED_REFRESH:
 105                     // Nothing to do right now.
 106                     return;
 107                 }
 108               }
 109             }
 110           );
 111         }),
 112         default: () => next(action),
 113       });
 114     };
 115   };