From e1b5a33649574927bee82d7541ee84c955c8c389 Mon Sep 17 00:00:00 2001
From: Remi <73385395+itsrubberduck@users.noreply.github.com>
Date: Sat, 18 Oct 2025 14:48:13 +0200
Subject: [PATCH] Handle Hotjar consent via local storage

---
 app/app.vue                         | 97 ++++++++++++++++++++++++++++-
 app/composables/useCookieConsent.ts | 19 ++++++
 2 files changed, 114 insertions(+), 2 deletions(-)

diff --git a/app/app.vue b/app/app.vue
index f9cc8e1..49c748e 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -5,12 +5,27 @@
   </v-app>
 </template>
 <script setup lang="ts">
-import { computed } from 'vue';
-import { useRoute } from '#imports';
+import { computed, onMounted, watch } from 'vue';
+import { useHotjar, useRoute, useState } from '#imports';
 import { useAuthStore } from '~/stores/auth';
+import { HOTJAR_LOCAL_STORAGE_KEY, useCookieConsent } from '~/composables/useCookieConsent';
+
+const HOTJAR_ID = 6522897;
+const HOTJAR_SCRIPT_VERSION = 6;
+const HOTJAR_INIT_DELAY = 500;
+
+declare global {
+  interface Window {
+    hj?: ((...args: unknown[]) => void) & { q?: unknown[][] };
+    _hjOptOut?: boolean;
+  }
+}
 
 const route = useRoute();
 const authStore = useAuthStore();
+const { hasConsent, analyticsEnabled } = useCookieConsent();
+const { initialize } = useHotjar();
+const hotjarInitialized = useState('hotjar-initialized', () => false);
 
 const showCookieBanner = computed(() => {
   if (!authStore.isAuthenticated) {
@@ -19,4 +34,82 @@ const showCookieBanner = computed(() => {
 
   return route.path === '/';
 });
+
+const setHotjarOptOut = (optOut: boolean) => {
+  if (typeof window === 'undefined') {
+    return;
+  }
+
+  window._hjOptOut = optOut;
+
+  if (optOut && typeof window.hj === 'function') {
+    try {
+      window.hj('event', 'cookie_consent_opt_out');
+    } catch {
+      // ignore errors when notifying Hotjar of opt-out
+    }
+  }
+};
+
+const persistLocalPreference = (value: 'granted' | 'denied' | null) => {
+  if (typeof window === 'undefined') {
+    return;
+  }
+
+  if (value === null) {
+    window.localStorage.removeItem(HOTJAR_LOCAL_STORAGE_KEY);
+    return;
+  }
+
+  window.localStorage.setItem(HOTJAR_LOCAL_STORAGE_KEY, value);
+};
+
+const scheduleHotjarInitialization = () => {
+  if (hotjarInitialized.value || typeof window === 'undefined') {
+    return;
+  }
+
+  hotjarInitialized.value = true;
+
+  window.setTimeout(() => {
+    initialize(HOTJAR_ID, HOTJAR_SCRIPT_VERSION);
+  }, HOTJAR_INIT_DELAY);
+};
+
+onMounted(() => {
+  if (typeof window === 'undefined') {
+    return;
+  }
+
+  const storedPreference = window.localStorage.getItem(HOTJAR_LOCAL_STORAGE_KEY);
+
+  if (storedPreference === 'granted') {
+    setHotjarOptOut(false);
+    scheduleHotjarInitialization();
+  }
+
+  if (storedPreference === 'denied') {
+    setHotjarOptOut(true);
+  }
+
+  watch(
+    [() => hasConsent.value, () => analyticsEnabled.value],
+    ([consent, enabled]) => {
+      if (!consent) {
+        persistLocalPreference(null);
+        setHotjarOptOut(true);
+        return;
+      }
+
+      const localValue = enabled ? 'granted' : 'denied';
+      persistLocalPreference(localValue);
+      setHotjarOptOut(!enabled);
+
+      if (enabled) {
+        scheduleHotjarInitialization();
+      }
+    },
+    { immediate: true }
+  );
+});
 </script>
diff --git a/app/composables/useCookieConsent.ts b/app/composables/useCookieConsent.ts
index 726652a..a094313 100644
--- a/app/composables/useCookieConsent.ts
+++ b/app/composables/useCookieConsent.ts
@@ -14,6 +14,7 @@ type CookieConsentValue = {
 const CONSENT_COOKIE_NAME = 'osq-cookie-consent';
 const CONSENT_VERSION = 1;
 const SIX_MONTHS_IN_SECONDS = 60 * 60 * 24 * 180;
+export const HOTJAR_LOCAL_STORAGE_KEY = 'osq-hotjar-consent';
 
 export const useCookieConsent = () => {
   const consentCookie = useCookie<CookieConsentValue | null>(CONSENT_COOKIE_NAME, {
@@ -37,6 +38,24 @@ export const useCookieConsent = () => {
     { deep: true }
   );
 
+  if (process.client) {
+    watch(
+      consentState,
+      (value) => {
+        if (!value) {
+          window.localStorage.removeItem(HOTJAR_LOCAL_STORAGE_KEY);
+          return;
+        }
+
+        window.localStorage.setItem(
+          HOTJAR_LOCAL_STORAGE_KEY,
+          value.preferences.analytics ? 'granted' : 'denied'
+        );
+      },
+      { deep: true }
+    );
+  }
+
   const hasConsent = computed(() => consentState.value !== null);
 
   const analyticsEnabled = computed(() => {