topcoder-react-lib/src/reducers/settings.js

The implementation of TC lib for ReactJS projects

/**
 * @module "reducers.settings"
 * @desc Reducer for the Redux store segment that holds traits data.
 */

import { handleActions } from 'redux-actions';
import logger from '../utils/logger';
import actions from '../actions/settings';
import { fireErrorMessage } from '../utils/errors';

/**
 * Handles SETTINGS/GET_ALL_USER_TRAITS action.
 * @param {Object} state
 * @param {Object} action
 * @return {Object} New state.
 */
function onGetAllUserTraits(state, { error, payload }) {
  if (error) {
    logger.error('Failed to get all user traits', payload);
    return {
      ...state,
      userTraits: [],
    };
  }

  return {
    ...state,
    userTraits: payload.data,
  };
}

/**
 * Handles SETTINGS/MODIFY_USER_TRAIT_INIT action.
 * @param {Object} state *
 * @return {Object} New state.
 */
function onModifyUserTraitInit(state) {
  return {
    ...state,
    traitRequestCount: state.traitRequestCount + 1,
  };
}

/**
 * Handles SETTINGS/ADD_USER_TRAIT action.
 * @param {Object} state
 * @param {Object} action
 * @return {Object} New state.
 */
function onAddUserTrait(state, { error, payload }) {
  if (error) {
    logger.error('Failed to add user trait', payload);
    fireErrorMessage('Failed to add user trait', '');
    return {
      ...state,
      traitRequestCount: state.traitRequestCount - 1,
    };
  }
  const newData = payload.result[0];
  return {
    ...state,
    userTraits: [...state.userTraits, newData],
    traitRequestCount: state.traitRequestCount - 1,
  };
}

/**
 * Handles SETTINGS/UPDATE_USER_TRAIT action.
 * @param {Object} state
 * @param {Object} action
 * @return {Object} New state.
 */
function onUpdateUserTrait(state, { error, payload }) {
  if (error) {
    logger.error('Failed to update user trait', payload);
    fireErrorMessage('Failed to update user trait', '');
    return {
      ...state,
      traitRequestCount: state.traitRequestCount - 1,
    };
  }
  const newData = payload.result[0];
  const newUserTraits = state.userTraits.filter(trait => trait.traitId !== payload.traitId);
  newUserTraits.push(newData);

  return {
    ...state,
    userTraits: newUserTraits,
    traitRequestCount: state.traitRequestCount - 1,
  };
}

/**
 * Handles SETTINGS/DELETE_USER_TRAIT action.
 * @param {Object} state
 * @param {Object} action
 * @return {Object} New state.
 */
function onDeleteUserTrait(state, { error, payload }) {
  if (error) {
    logger.error('Failed to delete user trait', payload);
    fireErrorMessage('Failed to delete user trait', '');
    return {
      ...state,
      traitRequestCount: state.traitRequestCount - 1,
    };
  }
  const newUserTraits = state.userTraits.filter(trait => trait.traitId !== payload.traitId);
  return {
    ...state,
    userTraits: newUserTraits,
    traitRequestCount: state.traitRequestCount - 1,
  };
}


/**
 * Creates a new user trait reducer with the specified initial state.
 * @param {Object} initialState Optional. Initial state.
 * @return {Function} userTraits reducer.
 */
function create(initialState = {
  traitRequestCount: 0,
  userTraits: [],
}) {
  const a = actions.settings;
  return handleActions({
    [a.getAllUserTraits]: onGetAllUserTraits,
    [a.modifyUserTraitInit]: onModifyUserTraitInit,
    [a.addUserTrait]: onAddUserTrait,
    [a.deleteUserTrait]: onDeleteUserTrait,
    [a.updateUserTrait]: onUpdateUserTrait,
  }, initialState);
}

export function factory() {
  return Promise.resolve(create());
}

export default create();