Shopify theme.liquid — customer metafield -> cart attribute sync (B2B, consent, customer_id)

theme-liquid-customer-context.liquid

{%- comment -%} theme.liquid — head sonuna yakın, Shopify.analytics yüklendikten sonra {%- endcomment -%}
{% if customer %}
<script>
(async function syncCustomerContext() {
  try {
    const desired = {
      _b2b: {{ customer.b2b? | default: customer.metafields.custom.b2b_status.value | default: false | json }},
      _customer_id: {{ customer.id | json }},
      _customer_tags: {{ customer.tags | join: ',' | json }}
    };

    const cart = await fetch('/cart.js', { credentials: 'same-origin' }).then(r => r.json());
    const current = cart.attributes || {};

    const diff = Object.keys(desired).some(k => String(current[k]) !== String(desired[k]));
    if (!diff) return;

    await fetch('/cart/update.js', {
      method: 'POST',
      credentials: 'same-origin',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        attributes: Object.fromEntries(
          Object.entries(desired).map(([k, v]) => [k, String(v)])
        )
      })
    });
  } catch (err) {
    // Sessiz fail; analytics enrichment non-critical path
  }
})();
</script>
{% endif %}