Add cookies popup (#690)

src/components/Matomo.jsx

@@ -1,9 +1,12 @@
 import Script from "next/script";
 
-export function MatomoTagManager() {
+export function MatomoTagManager({ consentGiven }) {
   return (
     <Script id="matomo-tag-manager" strategy="afterInteractive">
-      {`var _mtm = window._mtm = window._mtm || [];
+      {`var _paq = window._paq = window._paq || [];
+_paq.push(['requireCookieConsent']);
+${consentGiven ? "_paq.push(['setCookieConsentGiven']);" : ""}
+var _mtm = window._mtm = window._mtm || [];
 _mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
 (function() {
   var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];

src/components/cookie-consent/CookieConsent.jsx

@@ -0,0 +1,70 @@
+import { useCookieConsent } from '@/components/cookie-consent/CookieConsentProvider'
+import clsx from 'clsx'
+import { useEffect, useState } from 'react'
+
+export function CookieConsent() {
+  const { showConsent, acceptCookies, declineCookies } = useCookieConsent()
+  const [visible, setVisible] = useState(false)
+
+  useEffect(() => {
+    if (showConsent) {
+      // Small delay so the CSS transition plays on mount
+      const id = setTimeout(() => setVisible(true), 50)
+      return () => clearTimeout(id)
+    }
+    setVisible(false)
+  }, [showConsent])
+
+  if (!showConsent) return null
+
+  return (
+    <div
+      className={clsx(
+        'fixed inset-0 z-[999] flex items-center justify-center px-4 transition-opacity duration-300',
+        visible ? 'opacity-100' : 'opacity-0'
+      )}
+    >
+      {/* Backdrop */}
+      <div className="absolute inset-0 bg-black/60 backdrop-blur-sm" />
+
+      {/* Banner */}
+      <div className="relative mx-auto max-w-lg rounded-xl border border-neutral-800 bg-black px-8 pb-6 pt-4 shadow-lg">
+        <h3 className="text-base font-semibold text-white">
+          We are using cookies
+        </h3>
+        <p className="mt-2 text-sm leading-relaxed text-white/70">
+          We use our own cookies as well as third-party cookies on our websites
+          to enhance your experience, analyze our traffic, and for security and
+          marketing. View our{' '}
+          <a
+            href="https://netbird.io/privacy"
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-white underline underline-offset-4 transition-colors hover:text-netbird"
+          >
+            Privacy Policy
+          </a>{' '}
+          for more information.
+        </p>
+
+        <div className="mt-4 flex items-center justify-between gap-8">
+          <button
+            type="button"
+            onClick={declineCookies}
+            className="cursor-pointer text-xs text-white/70 underline underline-offset-[6px] transition-colors duration-300 hover:text-netbird"
+          >
+            Required only cookies
+          </button>
+
+          <button
+            type="button"
+            onClick={acceptCookies}
+            className="rounded-md bg-netbird px-5 py-2.5 text-sm font-medium text-black transition-colors hover:bg-netbird/90"
+          >
+            Accept all cookies
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/cookie-consent/CookieConsentProvider.jsx

@@ -0,0 +1,97 @@
+import { createContext, useCallback, useContext, useEffect, useState } from 'react'
+import { useRouter } from 'next/router'
+
+const STORAGE_KEY = 'cookie-consent'
+const ACCEPT_EXPIRY_DAYS = 90
+const DECLINE_EXPIRY_DAYS = 1
+
+const CookieConsentContext = createContext({
+  isAccepted: false,
+  showConsent: false,
+  acceptCookies: () => {},
+  declineCookies: () => {},
+})
+
+function getStoredConsent() {
+  if (typeof window === 'undefined') return null
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (!raw) return null
+    const { value, expires } = JSON.parse(raw)
+    if (Date.now() > expires) {
+      localStorage.removeItem(STORAGE_KEY)
+      return null
+    }
+    return value
+  } catch {
+    return null
+  }
+}
+
+function storeConsent(value, days) {
+  try {
+    localStorage.setItem(
+      STORAGE_KEY,
+      JSON.stringify({
+        value,
+        expires: Date.now() + days * 24 * 60 * 60 * 1000,
+      })
+    )
+  } catch {}
+}
+
+export function CookieConsentProvider({ children }) {
+  const router = useRouter()
+  const [consent, setConsent] = useState(() => getStoredConsent())
+  const [showConsent, setShowConsent] = useState(false)
+
+  useEffect(() => {
+    const stored = getStoredConsent()
+    setConsent(stored)
+    setShowConsent(stored === null)
+  }, [])
+
+  useEffect(() => {
+    // Hide banner on privacy-related pages
+    if (router.pathname.startsWith('/privacy') || router.pathname.startsWith('/terms')) {
+      setShowConsent(false)
+    }
+  }, [router.pathname])
+
+  const acceptCookies = useCallback(() => {
+    storeConsent('accepted', ACCEPT_EXPIRY_DAYS)
+    setConsent('accepted')
+    setShowConsent(false)
+
+    // Enable Matomo cookies
+    window._paq = window._paq || []
+    window._paq.push(['setCookieConsentGiven'])
+  }, [])
+
+  const declineCookies = useCallback(() => {
+    storeConsent('declined', DECLINE_EXPIRY_DAYS)
+    setConsent('declined')
+    setShowConsent(false)
+
+    // Tell Matomo to forget consent and delete its cookies
+    window._paq = window._paq || []
+    window._paq.push(['forgetCookieConsentGiven'])
+  }, [])
+
+  return (
+    <CookieConsentContext.Provider
+      value={{
+        isAccepted: consent === 'accepted',
+        showConsent,
+        acceptCookies,
+        declineCookies,
+      }}
+    >
+      {children}
+    </CookieConsentContext.Provider>
+  )
+}
+
+export function useCookieConsent() {
+  return useContext(CookieConsentContext)
+}

src/pages/_app.jsx

@@ -15,6 +15,8 @@ import {dom} from "@fortawesome/fontawesome-svg-core";
 import {AnnouncementBannerProvider} from "@/components/announcement-banner/AnnouncementBannerProvider";
 import {ImageZoom} from "@/components/ImageZoom";
 import {MatomoTagManager} from "@/components/Matomo";
+import {CookieConsentProvider, useCookieConsent} from "@/components/cookie-consent/CookieConsentProvider";
+import {CookieConsent} from "@/components/cookie-consent/CookieConsent";
 
 function onRouteChange() {
   useMobileNavigationStore.getState().close()
@@ -23,12 +25,14 @@ function onRouteChange() {
 Router.events.on('routeChangeStart', onRouteChange)
 Router.events.on('hashChangeStart', onRouteChange)
 
-export default function App({ Component, pageProps }) {
+function AppInner({ Component, pageProps }) {
   let router = useRouter()
   let tableOfContents = collectHeadings(pageProps.sections)
+  const { isAccepted } = useCookieConsent()
+
   return (
     <>
-      <MatomoTagManager />
+      <MatomoTagManager consentGiven={isAccepted} />
       <Head>
         <style>{dom.css()}</style>
         {router.route.startsWith('/ipa') ?
@@ -45,10 +49,19 @@ export default function App({ Component, pageProps }) {
       </AnnouncementBannerProvider>
       <ToastContainer />
       <ImageZoom />
+      <CookieConsent />
     </>
   )
 }
 
+export default function App(props) {
+  return (
+    <CookieConsentProvider>
+      <AppInner {...props} />
+    </CookieConsentProvider>
+  )
+}
+
 function collectHeadings(sections, slugify = slugifyWithCounter()) {
     let output = []