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