Merge pull request #1071 from plastic-labs/eri/dev-2465

feat(docs): cookie consent on honcho.dev/docs

docs/docs.json

@@ -610,8 +610,8 @@
     }
   },
   "integrations": {
-    "posthog": {
-      "apiKey": "phc_1yrzzcgywqXGcerkkI4g7C0YfyPMcAKNOOvGcjTCiUk"
+    "gtm": {
+      "tagId": "GTM-NSPT9PJF"
     }
   }
 }

docs/posthog-consent.js

@@ -0,0 +1,69 @@
+// Loads PostHog only when the CookieConsent cookie grants Statistics; the
+// cookie is host-scoped, so a landing-page answer covers the docs.
+;(function () {
+  var KEY = 'phc_1yrzzcgywqXGcerkkI4g7C0YfyPMcAKNOOvGcjTCiUk'
+  var loaded = false
+
+  function granted() {
+    var m = document.cookie.match(/(?:^|;\s*)CookieConsent=([^;]*)/)
+    if (!m) return false
+    var v = decodeURIComponent(m[1])
+    // "-1" is Cookiebot's consent-not-required marker.
+    return v === '-1' || /statistics\s*:\s*true/.test(v)
+  }
+
+  function loadPosthog() {
+    if (loaded) return
+    loaded = true
+    var s = document.createElement('script')
+    s.src = 'https://us-assets.i.posthog.com/static/array.js'
+    s.async = true
+    s.onerror = function () {
+      loaded = false
+    }
+    s.onload = function () {
+      // Consent withdrawn while array.js was downloading: skip init, allow a retry on re-grant.
+      if (!granted()) {
+        loaded = false
+        return
+      }
+      window.posthog.init(KEY, {
+        api_host: 'https://us.i.posthog.com',
+        ui_host: 'https://us.posthog.com',
+        cross_subdomain_cookie: true,
+        person_profiles: 'identified_only',
+        capture_pageview: 'history_change',
+      })
+    }
+    document.head.appendChild(s)
+  }
+
+  function sync() {
+    if (granted()) {
+      if (!loaded) {
+        loadPosthog()
+      } else if (
+        window.posthog &&
+        window.posthog.has_opted_out_capturing &&
+        window.posthog.has_opted_out_capturing()
+      ) {
+        window.posthog.opt_in_capturing()
+      }
+      return
+    }
+    // Withdrawal mid-session: an already running instance must stop.
+    if (loaded && window.posthog && window.posthog.opt_out_capturing) {
+      window.posthog.opt_out_capturing()
+    }
+  }
+
+  sync()
+  var events = [
+    'CookiebotOnConsentReady',
+    'CookiebotOnAccept',
+    'CookiebotOnDecline',
+  ]
+  for (var i = 0; i < events.length; i++) {
+    window.addEventListener(events[i], sync)
+  }
+})()