Reducer to use with useStateValue

Sample-Reducer.js

// Inside component use 
// const [{data}, dispatch] = useStateValue();

// REDUCER

export default function (state, action) {
  switch (action.type) {
    case "SET_DATA":
      return {
        ...state,
        data: action.newData
      };
    case "SET_VISIBLE_DATA":
      return {
        ...state,
        visibleData: action.newVisibleData
      };
    case "SET_FONT_COLORS":
      let newFontState = {};
      if (action.numberType === "odd") {
        switch (state.fontColors.odd) {
          case "black":
            newFontState = {
              ...state.fontColors,
              [action.numberType]: "orange"
            };
            break;
          case "orange":
            newFontState = {
              ...state.fontColors,
              [action.numberType]: "black"
            };
            break;
          default:
            break;
        }
      }
      if (action.numberType === "even") {
        switch (state.fontColors.even) {
          case "black":
            newFontState = {
              ...state.fontColors,
              [action.numberType]: "green"
            };
            break;
          case "green":
            newFontState = {
              ...state.fontColors,
              [action.numberType]: "black"
            };
            break;
          default:
            break;
        }
      }
      return {
        ...state,
        fontColors: newFontState
      };
    case "SET_COLUMN_SORT_DIRECTIONS":
      return {
        ...state,
        columnSortDirections: action.newColumnSortDirections
      };
    default:
      break;
  }
};