bastodon/app/javascript/mastodon/reducers/alerts.js

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import { List as ImmutableList } from 'immutable';
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import {
ALERT_SHOW,
ALERT_DISMISS,
ALERT_CLEAR,
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} from '../actions/alerts';
const initialState = ImmutableList([]);
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let id = 0;
const addAlert = (state, alert) =>
state.push({
key: id++,
...alert,
});
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export default function alerts(state = initialState, action) {
switch(action.type) {
case ALERT_SHOW:
return addAlert(state, action.alert);
case ALERT_DISMISS:
return state.filterNot(item => item.key === action.alert.key);
case ALERT_CLEAR:
return state.clear();
default:
return state;
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}
}