Function reduceLoadingStatuses

lib/reducers/loading-reducer.js:16–95

(
  state: { [key: string]: { [idx: number]: LoadingStatus } },
  action: BaseAction,
)

};

function reduceLoadingStatuses(
  state: { [key: string]: { [idx: number]: LoadingStatus } },
  action: BaseAction,
): { [key: string]: { [idx: number]: LoadingStatus } } {
  const startMatch = action.type.match(/(.*)_STARTED/);
  if (startMatch && fetchKeyRegistry.has(action.type)) {
    if (!action.loadingInfo || typeof action.loadingInfo !== 'object') {
      return state;
    }
    const { loadingInfo } = action;
    if (typeof loadingInfo.fetchIndex !== 'number') {
      return state;
    }
    const keyName: string =
      loadingInfo.customKeyName && typeof loadingInfo.customKeyName === 'string'
        ? loadingInfo.customKeyName
        : startMatch[1];
    if (loadingInfo.trackMultipleRequests) {
      return {
        ...state,
        [keyName]: {
          ...state[keyName],
          [loadingInfo.fetchIndex]: 'loading',
        },
      };
    } else {
      return {
        ...state,
        [keyName]: {
          [loadingInfo.fetchIndex]: 'loading',
        },
      };
    }
  }
  const failMatch = action.type.match(/(.*)_FAILED/);
  if (failMatch && fetchKeyRegistry.has(action.type)) {
    if (!action.loadingInfo || typeof action.loadingInfo !== 'object') {
      return state;
    }
    const { loadingInfo } = action;
    if (typeof loadingInfo.fetchIndex !== 'number') {
      return state;
    }
    const keyName: string =
      loadingInfo.customKeyName && typeof loadingInfo.customKeyName === 'string'
        ? loadingInfo.customKeyName
        : failMatch[1];
    if (state[keyName] && state[keyName][loadingInfo.fetchIndex]) {
      return {
        ...state,
        [keyName]: {
          ...state[keyName],
          [loadingInfo.fetchIndex]: 'error',
        },
      };
    }
    return state;
  }