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path: root/app/assets/javascripts/components/reducers/alerts.jsx
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import {
  ALERT_SHOW,
  ALERT_DISMISS,
  ALERT_CLEAR
} from '../actions/alerts';
import Immutable from 'immutable';

const initialState = Immutable.List([]);

export default function alerts(state = initialState, action) {
  switch(action.type) {
    case ALERT_SHOW:
      return state.push(Immutable.Map({
        key: state.size > 0 ? state.last().get('key') + 1 : 0,
        title: action.title,
        message: action.message
      }));
    case ALERT_DISMISS:
      return state.filterNot(item => item.get('key') === action.alert.key);
    case ALERT_CLEAR:
      return state.clear();
    default:
      return state;
  }
};