68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
import actions from '../actions';
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const defaultState = {
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groupSelection: -1,
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itemSelection: -1,
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groups: [],
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};
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const nextSelection = (state) => {
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if (state.groupSelection < 0) {
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return [0, 0];
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}
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let group = state.groups[state.groupSelection];
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if (state.groupSelection + 1 >= state.groups.length &&
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state.itemSelection + 1 >= group.items.length) {
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return [-1, -1];
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}
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if (state.itemSelection + 1 >= group.items.length) {
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return [state.groupSelection + 1, 0];
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}
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return [state.groupSelection, state.itemSelection + 1];
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};
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const prevSelection = (state) => {
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if (state.groupSelection < 0) {
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return [
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state.groups.length - 1,
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state.groups[state.groups.length - 1].items.length - 1
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];
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}
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if (state.groupSelection === 0 && state.itemSelection === 0) {
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return [-1, -1];
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} else if (state.itemSelection === 0) {
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return [
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state.groupSelection - 1,
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state.groups[state.groupSelection - 1].items.length - 1
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];
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}
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return [state.groupSelection, state.itemSelection - 1];
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};
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export default function reducer(state = defaultState, action = {}) {
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switch (action.type) {
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case actions.COMPLETION_SET_ITEMS:
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return Object.assign({}, state, {
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groups: action.groups,
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groupSelection: -1,
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itemSelection: -1,
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});
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case actions.COMPLETION_SELECT_NEXT: {
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let next = nextSelection(state);
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return Object.assign({}, state, {
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groupSelection: next[0],
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itemSelection: next[1],
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});
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}
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case actions.COMPLETION_SELECT_PREV: {
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let next = prevSelection(state);
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return Object.assign({}, state, {
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groupSelection: next[0],
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itemSelection: next[1],
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});
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}
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default:
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return defaultState;
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}
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}
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