text: // Licensed under the Apache License, Version 2.0 (the "License"); you may not
  // use this file except in compliance with the License. You may obtain a copy of
  // the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  // License for the specific language governing permissions and limitations under
  // the License.
  
  import FauxtonAPI from '../../../../core/api';
  import { fetchDocs } from './fetch';
  import ActionTypes from '../actiontypes';
  
  export const toggleShowAllColumns = () => {
    return {
      type: ActionTypes.INDEX_RESULTS_REDUX_TOGGLE_SHOW_ALL_COLUMNS
    };
  };
  
  export const setPerPage = (amount) => {
    return {
      type: ActionTypes.INDEX_RESULTS_REDUX_SET_PER_PAGE,
      perPage: amount
    };
  };
  
  export const resetFetchParamsBeforePerPageChange = (fetchParams, queryOptionsParams, amount) => {
    return Object.assign({}, fetchParams, {
      limit: amount + 1,
      skip: queryOptionsParams.skip || 0
    });
  };
  
  export const updatePerPageResults = (queryDocs, fetchParams, queryOptionsParams, amount) => {
    // Set the query limit to the perPage + 1 so we know if there is
    // a next page.  We also need to reset to the beginning of all
    // possible pages since our logic to paginate backwards can't handle
    // changing perPage amounts.
    fetchParams = resetFetchParamsBeforePerPageChange(fetchParams, queryOptionsParams, amount);
  
    return (dispatch) => {
      dispatch(setPerPage(amount));
      dispatch(fetchDocs(queryDocs, fetchParams, queryOptionsParams));
    };
  };
  
  export const incrementSkipForPageNext = (fetchParams, perPage) => {
    return Object.assign({}, fetchParams, {
      skip: fetchParams.skip + perPage
    });
  };
  
  export const paginateNext = (queryDocs, fetchParams, queryOptionsParams, perPage) => {
    // add the perPage to the previous skip.
    fetchParams = incrementSkipForPageNext(fetchParams, perPage);
  
    return (dispatch) => {
      dispatch({
        type: ActionTypes.INDEX_RESULTS_REDUX_PAGINATE_NEXT
      });
      dispatch(fetchDocs(queryDocs, fetchParams, queryOptionsParams));
    };
  };
  
  export const decrementSkipForPagePrevious = (fetchParams, perPage) => {
    return Object.assign({}, fetchParams, {
      skip: Math.max(fetchParams.skip - perPage, 0)
    });
  };
  
  export const paginatePrevious = (queryDocs, fetchParams, queryOptionsParams, perPage) => {
    // subtract the perPage to the previous skip.
    fetchParams = decrementSkipForPagePrevious(fetchParams, perPage);
  
    return (dispatch) => {
      dispatch({
        type: ActionTypes.INDEX_RESULTS_REDUX_PAGINATE_PREVIOUS
      });
      dispatch(fetchDocs(queryDocs, fetchParams, queryOptionsParams));
    };
  };
  
  export const resetPagination = (perPage = FauxtonAPI.constants.MISC.DEFAULT_PAGE_SIZE) => {
    return setPerPage(perPage);
  };
  