vt-social/app/javascript/mastodon/reducers/alerts.js

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import {
ALERT_SHOW,
ALERT_DISMISS,
ALERT_CLEAR,
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} from '../actions/alerts';
import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
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const initialState = ImmutableList([]);
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export default function alerts(state = initialState, action) {
switch(action.type) {
case ALERT_SHOW:
return state.push(ImmutableMap({
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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}
};