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mastodon/app/assets/javascripts/components/reducers/notifications.jsx

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import {
NOTIFICATION_SHOW,
NOTIFICATION_DISMISS,
NOTIFICATION_CLEAR
} from '../actions/notifications';
import Immutable from 'immutable';
const initialState = Immutable.List([]);
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export default function notifications(state = initialState, action) {
switch(action.type) {
case NOTIFICATION_SHOW:
return state.push(Immutable.Map({
key: state.size > 0 ? state.last().get('key') + 1 : 0,
title: action.title,
message: action.message
}));
case NOTIFICATION_DISMISS:
return state.filterNot(item => item.get('key') === action.notification.key);
case NOTIFICATION_CLEAR:
return state.clear();
default:
return state;
}
};