Server-Side Tracking for OpenCart

<!-- Traksolv · OpenCart DataLayer — paste in footer.twig or Custom JS module -->
<script>
(function (w, d) {
  w.dataLayer = w.dataLayer || [];
  var DEBUG = false;
  try {
    var q = new URLSearchParams(location.search);
    if (q.get('tcDebug') === '1') { DEBUG = true; try { localStorage.setItem('tcDebug', '1'); } catch (e) {} }
    else if (q.get('tcDebug') === '0') { DEBUG = false; try { localStorage.removeItem('tcDebug'); } catch (e) {} }
    else { try { if (localStorage.getItem('tcDebug') === '1') DEBUG = true; } catch (e) {} }
  } catch (e) {}
  w.tcDebug = DEBUG;
  if (DEBUG && w.console && w.console.log) {
    try { w.console.log('%c[Traksolv]%c dataLayer debug ON — every push will log here. Disable with ?tcDebug=0', 'color:#22c55e;font-weight:600;background:#0a1f0c;padding:2px 6px;border-radius:3px', ''); } catch (e) {}
  }
  function log() {
    if (!DEBUG || !w.console || !w.console.log) return;
    try { w.console.log.apply(w.console, ['[Traksolv]'].concat([].slice.call(arguments))); } catch (e) {}
  }
  function push(eventName, eventId, params) {
    try {
      if (params && params.ecommerce !== undefined) w.dataLayer.push({ ecommerce: null });
      var ev = { event: eventName, event_id: eventName + '.' + eventId };
      if (params) for (var k in params) if (Object.prototype.hasOwnProperty.call(params, k)) ev[k] = params[k];
      w.dataLayer.push(ev);
      log('push ' + eventName, ev);
    } catch (e) {}
  }
  function once(key) {
    try { if (sessionStorage.getItem(key)) return false; sessionStorage.setItem(key, '1'); return true; }
    catch (e) { return true; }
  }
  function money(v) { return parseFloat(String(v == null ? '' : v).replace(/[^\d.\-]/g, '')) || 0; }
  function textOf(sel, root) { var el = (root || d).querySelector(sel); return el ? (el.textContent || '').trim() : ''; }
  function attrOf(sel, attr, root) { var el = (root || d).querySelector(sel); return el ? (el.getAttribute(attr) || '') : ''; }

  w.tcFirePurchase = function (o) {
    try {
      if (!o || !o.orderId) return;
      if (!once('tc_purchase_' + o.orderId)) return;
      push('purchase', String(o.orderId), {
        ecommerce: {
          transaction_id: String(o.orderId),
          value:          o.value || 0,
          currency:       o.currency || 'USD',
          items:          Array.isArray(o.items) ? o.items : []
        }
      });
    } catch (e) {}
  };

  function route() {
    var m = location.search.match(/[?&]route=([^&]+)/);
    return m ? decodeURIComponent(m[1]).toLowerCase() : '';
  }
  function pageType() {
    var r = route();
    if (/checkout\/success/.test(r))   return 'order';
    if (/checkout\/checkout/.test(r))  return 'checkout';
    if (/checkout\/cart/.test(r))      return 'cart';
    if (/product\/product/.test(r))    return 'product';
    if (/product\/(category|manufacturer|search)/.test(r)) return 'category';
    return 'other';
  }
  w.tcPageType = pageType;

  function fireViewItem() {
    try {
      var name = textOf('#content h1, .product-info h1');
      var price = money(textOf('#content .price, .product-info .price'));
      var pid = (location.search.match(/[?&]product_id=(\d+)/) || [])[1] || name;
      if (!pid) return;
      if (!once('tc_view_item_' + pid)) return;
      push('view_item', String(pid), {
        ecommerce: {
          currency: 'USD',
          value:    price,
          items: [{
            item_id:   String(pid),
            item_name: name,
            price:     price,
            quantity:  1
          }]
        }
      });
    } catch (e) {}
  }

  function fireViewItemList() {
    try {
      var cards = d.querySelectorAll('#content .product-thumb, #content .product-layout');
      if (!cards.length) return;
      if (!once('tc_view_item_list_' + location.pathname + location.search)) return;
      var items = [];
      for (var i = 0; i < Math.min(cards.length, 25); i++) {
        var c = cards[i];
        var link = c.querySelector('.caption h4 a, .caption a, h4 a');
        var name = link ? (link.textContent || '').trim() : '';
        var href = link ? (link.getAttribute('href') || '') : '';
        var pid = (href.match(/product_id=(\d+)/) || [])[1] || name;
        items.push({
          item_id:   String(pid),
          item_name: name,
          price:     money(textOf('.price, .price-new', c)),
          index:     i
        });
      }
      if (!items.length) return;
      push('view_item_list', location.pathname + location.search, {
        ecommerce: {
          item_list_id:   location.pathname,
          item_list_name: textOf('#content h1') || location.pathname,
          items:          items
        }
      });
    } catch (e) {}
  }

  function fireCart(eventName) {
    try {
      var rows = d.querySelectorAll('#content table tbody tr, #checkout-cart .cart-item');
      if (!rows.length) return;
      var key = location.search + '.' + rows.length;
      if (!once('tc_' + eventName + '_' + key)) return;
      var items = [];
      var total = 0;
      for (var i = 0; i < rows.length; i++) {
        var r = rows[i];
        var link = r.querySelector('a');
        var name = link ? (link.textContent || '').trim() : textOf('td', r);
        var qtyInput = r.querySelector('input[name^="quantity"]');
        var qty = qtyInput ? (parseInt(qtyInput.value, 10) || 1) : 1;
        var price = money(textOf('.text-right', r));
        var href = link ? (link.getAttribute('href') || '') : '';
        var pid = (href.match(/product_id=(\d+)/) || [])[1] || name;
        if (!pid) continue;
        items.push({ item_id: String(pid), item_name: name, price: price, quantity: qty });
        total += price * qty;
      }
      push(eventName, key.slice(0, 64), {
        ecommerce: { currency: 'USD', value: total, items: items }
      });
    } catch (e) {}
  }

  function firePurchase() {
    try {
      // OpenCart's success page DOM doesn't surface order id directly;
      // most stores render it in the heading or a confirmation
      // message. Use the page contents + a session-derived id as the
      // last resort.
      var orderId = textOf('#order-id, .order-id') ||
                    (textOf('#content h1').match(/#?(\d+)/) || [])[1] ||
                    'order.' + Date.now();
      if (!once('tc_purchase_' + orderId)) return;
      var total = money(textOf('.total, #total, #content .text-right strong'));
      push('purchase', String(orderId), {
        ecommerce: {
          transaction_id: String(orderId),
          value:    total,
          currency: 'USD',
          items:    []
        }
      });
    } catch (e) {}
  }

  // ── add_to_cart — OpenCart's add button is conventionally
  //    #button-cart. Hook clicks; product info comes from the page.
  d.addEventListener('click', function (e) {
    try {
      var btn = e.target && e.target.closest && e.target.closest('#button-cart, button[id^="button-cart"], button.add-to-cart');
      if (!btn) return;
      var name = textOf('#content h1, h1.product-name');
      var price = money(textOf('#content .price, .price-new'));
      var pid = (location.search.match(/[?&]product_id=(\d+)/) || [])[1] || name;
      if (!pid) return;
      push('add_to_cart', pid + '.' + Date.now(), {
        ecommerce: {
          currency: 'USD',
          value:    price,
          items: [{ item_id: String(pid), item_name: name, price: price, quantity: 1 }]
        }
      });
    } catch (e) {}
  }, true);

  function boot() {
    var t = pageType();
    if (t === 'product')  fireViewItem();
    if (t === 'category') fireViewItemList();
    if (t === 'cart')     fireCart('view_cart');
    if (t === 'checkout') fireCart('begin_checkout');
    if (t === 'order')    firePurchase();
  }
  if (d.readyState === 'loading') d.addEventListener('DOMContentLoaded', boot);
  else boot();
})(window, document);
</script>
<!-- End Traksolv OpenCart DataLayer -->

<!-- Traksolv · DataLayer enrichment — customer lifecycle + remarketing + attribution -->
<script>
(function (w, d) {
  function readLT() {
    try {
      var raw = localStorage.getItem('tc_lifetime');
      var p = raw ? JSON.parse(raw) : null;
      return {
        orderCount:    (p && p.orderCount)    || 0,
        lifetimeValue: (p && p.lifetimeValue) || 0,
        firstOrderTs:  (p && p.firstOrderTs)  || null,
        lastOrderTs:   (p && p.lastOrderTs)   || null,
        lastOrderId:   (p && p.lastOrderId)   || null
      };
    } catch (e) {
      return { orderCount: 0, lifetimeValue: 0, firstOrderTs: null, lastOrderTs: null, lastOrderId: null };
    }
  }
  function writeLT(lt) {
    try { localStorage.setItem('tc_lifetime', JSON.stringify(lt)); } catch (e) {}
  }
  function tier(v) {
    if (v >= 1000) return 'vip';
    if (v >= 250)  return 'mid';
    if (v > 0)     return 'low';
    return 'guest';
  }
  function readCookie(n) {
    try {
      var m = d.cookie.match(new RegExp('(^|; )' + n + '=([^;]+)'));
      return m ? decodeURIComponent(m[2]) : null;
    } catch (e) { return null; }
  }
  function readAttr() {
    try { var r = readCookie('_tc_attr'); return r ? JSON.parse(r) : null; } catch (e) { return null; }
  }

  w.tcReadLifetime    = readLT;
  w.tcCustomerTier    = function (v) { return tier(v != null ? v : readLT().lifetimeValue); };
  w.tcReadAttribution = readAttr;

  // ── Wrap tcFirePurchase to add customer-lifecycle + attribution ──
  // before the underlying snippet pushes the purchase event. Idempotent
  // per orderId, so customer refreshing the thank-you page doesn't
  // inflate their lifetime counters.
  var orig = w.tcFirePurchase;
  if (typeof orig === 'function') {
    w.tcFirePurchase = function (o) {
      try {
        if (!o || !o.orderId) return orig.apply(this, arguments);
        var lt = readLT();
        var firstFire = lt.lastOrderId !== String(o.orderId);
        var orderCount    = firstFire ? lt.orderCount + 1 : lt.orderCount;
        var lifetimeValue = firstFire ? lt.lifetimeValue + (o.value || 0) : lt.lifetimeValue;
        var firstOrderTs  = lt.firstOrderTs || Date.now();
        var newCustomer   = orderCount === 1;
        var daysSinceFirst = Math.floor((Date.now() - firstOrderTs) / 86400000);

        if (firstFire) {
          writeLT({
            orderCount:    orderCount,
            lifetimeValue: lifetimeValue,
            firstOrderTs:  firstOrderTs,
            lastOrderTs:   Date.now(),
            lastOrderId:   String(o.orderId)
          });
        }

        var attr = readAttr();
        // Build the enriched order. Preserve every original field; add
        // customer + attribution on top.
        var enriched = {};
        for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) enriched[k] = o[k];
        enriched.new_customer            = newCustomer;
        enriched.customer_type           = newCustomer ? 'new' : 'returning';
        enriched.customer_status         = 'customer';
        enriched.customer_lifetime_value = Math.round(lifetimeValue * 100) / 100;
        enriched.customer_order_count    = orderCount;
        enriched.customer_aov            = orderCount > 0 ? Math.round((lifetimeValue / orderCount) * 100) / 100 : 0;
        enriched.purchase_number         = orderCount;
        enriched.days_since_first_order  = daysSinceFirst;
        enriched.value_tier              = tier(lifetimeValue);
        if (attr) enriched.attribution = {
          landing:   attr.u   || null,
          referrer:  attr.r   || null,
          utm:       attr.utm || null,
          click_ids: attr.cid || null
        };
        return orig.call(this, enriched);
      } catch (e) {
        try { return orig.apply(this, arguments); } catch (e2) {}
      }
    };
  }

  // ── tc_visitor_context — emits visitor lifecycle + remarketing on
  //    every page-view. GTM / GA4 audience triggers + Google Ads
  //    dynamic remarketing tag read these.
  function visitorContext() {
    try {
      var lt = readLT();
      var attr = readAttr();
      var pageType = (typeof w.tcPageType === 'function') ? (w.tcPageType() || 'other') : 'other';
      w.dataLayer = w.dataLayer || [];
      w.dataLayer.push({
        event:                   'tc_visitor_context',
        event_id:                'tc_visitor_context.' + Date.now() + '.' + Math.random().toString(36).slice(2, 6),
        customer_status:         lt.orderCount > 0 ? 'returning_customer' : 'guest',
        customer_type:           lt.orderCount > 0 ? 'returning' : 'guest',
        value_tier:              tier(lt.lifetimeValue),
        customer_lifetime_value: Math.round(lt.lifetimeValue * 100) / 100,
        customer_order_count:    lt.orderCount,
        days_since_first_order:  lt.firstOrderTs ? Math.floor((Date.now() - lt.firstOrderTs) / 86400000) : null,
        ecomm_pagetype:          pageType,
        attribution: attr ? {
          landing:   attr.u   || null,
          referrer:  attr.r   || null,
          utm:       attr.utm || null,
          click_ids: attr.cid || null
        } : null
      });
    } catch (e) {}
  }
  if (d.readyState === 'loading') d.addEventListener('DOMContentLoaded', visitorContext);
  else visitorContext();
})(window, document);
</script>
<!-- End Traksolv enrichment -->