{% set flashTypeMap = {'danger': 'error', 'notice': 'info', 'alert': 'warning'} %}

{% set flashData = [] %}
{% for type, messages in app.flashes %}
    {% set toastType = flashTypeMap[type] is defined ? flashTypeMap[type] : type %}
    {% set toastType = toastType in ['success', 'error', 'warning', 'info'] ? toastType : 'info' %}
    {% for message in messages %}
        {% set flashData = flashData|merge([{'type': toastType, 'message': message}]) %}
    {% endfor %}
{% endfor %}

{% if flashData is not empty %}
<script>
window.__pendingFlashes = {{ flashData|json_encode(constant('JSON_HEX_TAG') b-or constant('JSON_HEX_AMP') b-or constant('JSON_HEX_APOS') b-or constant('JSON_HEX_QUOT'))|raw }};
</script>
{% endif %}