Hubspot Hubl Jinja implementation that sets the query parameter of a url depending on the arguments, with toggle and fullPath

createQueryUrl.twig

{#
  Examples in order:
  createQueryUrl('tags', 'online') // {url}?tags=online
  createQueryUrl('tags', 'in-store', true) // {url}?tags=online,in-store
  createQueryUrl('tags', 'omnichannel', true) // {url}?tags=online,in-store,omnichannel
  createQueryUrl('tags', 'in-store', true) // {url}?tags=online,omnichannel
  createQueryUrl('tags', null) // {url}
#}

{% macro createQueryUrl(key, value, toggleValue = false, fullPath = false) %}
  {% set dictItems = request.queryDict.items() %}

  {# collect all keys in the queryDict (queryDict.keys() doesn't work) #}
  {% set keys = [] %}
  {% for k, v in dictItems %}
    {% do keys.append(k) %}
  {% endfor %}

  {% set hasKey = key in keys %}
  {% set hasValue = value is string and value|length > 0 %}
  
  {% set parts = [] %}
    
  {% for k, v in dictItems %}
    {% if k == key %}
        {% if hasValue %}
          
          {# toggle or set value #}
          {% set values = v|split(',') %}
          
          {% if toggleValue %}
            {% if value in values %}
              {# remove value from values array #}
              {% set values = values|reject('in', [value]) %}
            {% else %}
              {# add value to values array #}
              {% do values.append(value) %}
            {% endif %}
          {% else %}
            {# overwrite the value instead #}
            {% set values = [value] %}
          {% endif %}

          {% if values|length > 0 %}
            {% do parts.append(k ~ '=' ~ values|join(',')) %}
          {% endif %}

        {# else don't append it to the parts #}
        {% endif %}
    {% else %}
        {% do parts.append(k ~ '=' ~ v) %}
    {% endif %}
  {% endfor %}

  {# if the key was not present in the queryDict we still want to add it #}
  {% if not hasKey and hasValue %}
    {% do parts.append(key ~ '=' ~ value) %}
  {% endif %}
  
  {% set basePath = fullPath ? request.fullUrl : request.path %}
  {{basePath ~ '?' ~ parts|join('&')}}
{% endmacro %}