32 lines
		
	
	
	
		
			800 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			32 lines
		
	
	
	
		
			800 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
import {
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  MEDIA_OPEN,
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  MODAL_CLOSE,
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  MODAL_INDEX_DECREASE,
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  MODAL_INDEX_INCREASE
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} from '../actions/modal';
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import Immutable from 'immutable';
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const initialState = Immutable.Map({
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  media: null,
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  index: 0,
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  open: false
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});
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export default function modal(state = initialState, action) {
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  switch(action.type) {
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  case MEDIA_OPEN:
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    return state.withMutations(map => {
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      map.set('media', action.media);
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      map.set('index', action.index);
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      map.set('open', true);
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    });
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  case MODAL_CLOSE:
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    return state.set('open', false);
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  case MODAL_INDEX_DECREASE:
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    return state.update('index', index => Math.max(index - 1, 0));
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  case MODAL_INDEX_INCREASE:
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    return state.update('index', index => Math.min(index + 1, state.get('media').size - 1));
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  default:
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    return state;
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  }
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};
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