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// ============================================ // UTM TRACKER - Add to ALL regional sites // ============================================ const UTMTracker = { keys: ['utm_source','utm_medium','utm_campaign','utm_content','utm_term'], cookieDays: 30, // Call on every page load init() { this.captureFromURL(); this.attachRedirectHooks(); }, captureFromURL() { const params = new URLSearchParams(window.location.search); const found = {}; this.keys.forEach(k => { if (params.has(k)) found[k] = params.get(k); }); if (Object.keys(found).length > 0) { if (!params.has('_carried')) { this.store(found); } } }, store(utms) { const expires = new Date(Date.now() + this.cookieDays * 86400000).toUTCString(); document.cookie = `_utms=${encodeURIComponent(JSON.stringify(utms))};expires=${expires};path=/;SameSite=Lax`; if (!this.getSessionId()) { const sid = 'sid_' + Date.now() + '_' + Math.random().toString(36).slice(2); document.cookie = `_sid=${sid};expires=${expires};path=/;SameSite=Lax`; } }, get() { const raw = this.getCookie('_utms'); try { return raw ? JSON.parse(decodeURIComponent(raw)) : {}; } catch { return {}; } }, getSessionId() { return this.getCookie('_sid'); }, getCookie(name) { return document.cookie.split('; ').find(r => r.startsWith(name + '='))?.split('=')[1] || null; }, attachRedirectHooks() { const REGIONAL_DOMAINS = [ 'mackbooks.co.uk', 'mackbooks.us', 'mackpublishing.au' ]; document.addEventListener('click', (e) => { const link = e.target.closest('a'); if (!link) return; const isRegional = REGIONAL_DOMAINS.some(d => link.href.includes(d)); if (!isRegional) return; e.preventDefault(); const url = new URL(link.href); const utms = this.get(); const sid = this.getSessionId(); Object.entries(utms).forEach(([k, v]) => url.searchParams.set(k, v)); if (sid) url.searchParams.set('_sid', sid); url.searchParams.set('_carried', '1'); url.searchParams.set('_origin', 'eu'); window.location.href = url.toString(); }); } }; UTMTracker.init();