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68 lines
1.7 KiB
68 lines
1.7 KiB
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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