Notifications - Customer Metafields

customer.liquid

{% assign valid_keys = ['products','brands','story_prefs','bookmarks'] %}

{% assign customer = form.customer_id | get: "Customer" %}
{% assign u_customer = "Customer" | new: customer.id %}
{% assign u_customer.metafields = [] %}
{% assign customer.metafields = "Metafield" | get_all: {parent:customer} %}

{% for key in valid_keys %}
    {% if form.field == key %}
        {% assign c_metafield = null %}
        {% for m in customer.metafields %}
            {% if m.namespace == 'favourites' and m.key == key %}{% assign c_metafield = m %}{% endif %}
        {% endfor %}
        {% if c_metafield %}
            {% assign metafield = 'Metafield' | new: c_metafield.id %}
            {% assign metafield.namespace = 'favourites' %}
            {% assign metafield.key = key %}
            {% assign metafield.value_type = "string" %}
            {% assign metafield.value = c_metafield.value %}
        {% else %}
            {% assign metafield = 'Metafield' | new %}
            {% assign metafield.namespace = 'favourites' %}
            {% assign metafield.key = key %}
            {% assign metafield.value_type = "string" %}
            {% assign metafield.value = "" %}
        {% endif %}
        
        {% if form.type == 'add' %}
            {% if metafield.value %}
                {% assign meta_array = metafield.value | split: ',' %}
                {% assign meta_array[meta_array.size] = form.value %}
                {% assign metafield.value = meta_array | uniq | join: ',' %}
            {% else %}
                {% assign metafield.value = form.value %}
            {% endif %}
        {% elsif form.type == 'remove' %}
            {% assign meta_array = metafield.value | replace: "(,|^)\K" + form.value + "(,|$)", "" | split: ',' %}
            {% assign metafield.value = meta_array | uniq | join: ',' %}
            {% assign metafield.value = metafield.value | replace: ",,","," %}
            {% assign metafield.value = metafield.value | replace: "^,","" %}
            {% assign metafield.value = metafield.value | replace: ",$","" %}
        {% endif %}
        
        {% assign u_customer.metafields[u_customer.metafields.size] = metafield %}
    {% endif %}
{% endfor %}

{% debug u_customer %}

{% if metafield.value == "" %}
    {% assign metafield = metafield | delete %}
{% else %}
    {% assign u_customer = u_customer | update %}
{% endif %}