{% macro input(name, label, type, opt) %}
    <div class="form-group">
        {% if label -%}
            <label for="{{ name }}">{{ label }}</label>
        {%- endif %}
        <input type="{{ type|default('text') }}" class="form-control"
               id="{{ name }}" name="{{ name }}"
               value="{{ opt.value|default('') }}"
                {%- if opt.required|default(false) %}
                    required="required"
                {%- endif -%}
        >
    </div>
{%- endmacro %}

{% macro hidden(name, value) %}
    <input type="hidden" id="{{ name }}" name="{{ name }}" value="{{ value }}">
{%- endmacro %}

{% macro submit(label) %}
    <button type="submit" class="btn btn-primary">{{ label|default(__('form.submit')) }}</button>
{%- endmacro %}