mastodon/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;
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}
};