(function () { 'use strict'; var STORAGE_KEY = 'rp_attribution'; var MAX_AGE_MS = 90 * 24 * 60 * 60 * 1000; var MAX_VALUE = 100; var UTM_KEYS = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_content', 'utm_term']; var TOUCH_KEYS = UTM_KEYS.concat(['referrer_host', 'landing_path']); var APP_STORE_ID = '6798431045'; var APP_STORE_PROVIDER_TOKEN = '129270735'; var PLAY_PACKAGE = 'com.readpals.app'; var script = document.currentScript || document.querySelector('script[src*="rp-attribution.v1.js"]'); var appOrigins = ['https://app.readpals.com']; var configured = script && script.getAttribute('data-app-origin'); if (configured) { try { var configuredOrigin = new URL(configured).origin; if (configuredOrigin !== window.location.origin && appOrigins.indexOf(configuredOrigin) < 0) { appOrigins.push(configuredOrigin); } } catch { // A malformed build value only means the default app origin is used. } } var memoryRecord = null; // Only pages whose analytics are on (the Next.js layout marks its tag with // data-analytics="posthog" when built with a key) get a visit id, and never // when the browser asks not to be tracked: PostHogProvider honors DNT too. var visitId = script && script.getAttribute('data-analytics') === 'posthog' && !doNotTrack() ? newVisitId() : ''; function doNotTrack() { var nav = window.navigator || {}; var values = [nav.doNotTrack, window.doNotTrack, nav.msDoNotTrack]; for (var i = 0; i < values.length; i++) { if (values[i] === '1' || values[i] === 'yes' || values[i] === true) return true; } return false; } /** A random RFC 4122 v4 UUID, held in memory for this page load only. */ function newVisitId() { try { if (window.crypto && typeof window.crypto.randomUUID === 'function') return window.crypto.randomUUID(); var b = window.crypto.getRandomValues(new Uint8Array(16)); b[6] = (b[6] & 0x0f) | 0x40; b[8] = (b[8] & 0x3f) | 0x80; var hex = ''; for (var i = 0; i < 16; i++) hex += (b[i] + 0x100).toString(16).slice(1); return hex.slice(0, 8) + '-' + hex.slice(8, 12) + '-' + hex.slice(12, 16) + '-' + hex.slice(16, 20) + '-' + hex.slice(20); } catch { return ''; } } function clean(value) { if (typeof value !== 'string') return ''; return value.trim().slice(0, MAX_VALUE); } function isOwnHost(host) { return ( host === window.location.hostname || host === 'readpals.com' || /\.readpals\.com$/.test(host) ); } function sameTouch(a, b) { if (!a || !b) return false; for (var i = 0; i < TOUCH_KEYS.length; i++) { if ((a[TOUCH_KEYS[i]] || '') !== (b[TOUCH_KEYS[i]] || '')) return false; } return true; } function readRecord() { var record = memoryRecord; try { var raw = window.localStorage.getItem(STORAGE_KEY); if (raw) record = JSON.parse(raw); } catch { // Storage blocked or unreadable: fall back to this page's memory copy. } if (!record || typeof record !== 'object' || !record.first_touch) return null; var updated = Date.parse(record.updated_at); if (!updated || Date.now() - updated > MAX_AGE_MS) { memoryRecord = null; try { window.localStorage.removeItem(STORAGE_KEY); } catch { // Nothing stored to remove. } return null; } return record; } function writeRecord(record) { memoryRecord = record; try { window.localStorage.setItem(STORAGE_KEY, JSON.stringify(record)); } catch { // Private mode or storage disabled: the memory copy serves this page. } } function captureTouch() { var params = new URLSearchParams(window.location.search); var touch = {}; var hasCampaign = false; for (var i = 0; i < UTM_KEYS.length; i++) { var value = clean(params.get(UTM_KEYS[i])); if (value) { touch[UTM_KEYS[i]] = value; hasCampaign = true; } } var referrerHost = ''; try { if (document.referrer) referrerHost = new URL(document.referrer).hostname.toLowerCase(); } catch { referrerHost = ''; } var external = referrerHost && !isOwnHost(referrerHost); if (!hasCampaign && !external) return; if (external) touch.referrer_host = clean(referrerHost); touch.landing_path = clean(window.location.pathname) || '/'; touch.captured_at = new Date().toISOString(); var record = readRecord(); // A reload of the same landing page is not a new visit. if (record && sameTouch(record.last_touch, touch)) return; writeRecord({ first_touch: record ? record.first_touch : touch, last_touch: touch, updated_at: touch.captured_at, }); } function base64Url(text) { var bytes = new TextEncoder().encode(text); var binary = ''; for (var i = 0; i < bytes.length; i++) binary += String.fromCharCode(bytes[i]); return window.btoa(binary).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, ''); } function slug(text) { return text .toLowerCase() .replace(/[^a-z0-9_-]+/g, '-') .replace(/-{2,}/g, '-') .replace(/^-+|-+$/g, ''); } function isBlog() { return /^\/blog(\/|$)/.test(window.location.pathname); } /** `_`, e.g. site_home, site_for-parents, blog_. */ function placementFor(link) { var explicit = link && link.getAttribute('data-rp-placement'); var raw; if (explicit) { raw = explicit; } else { var parts = window.location.pathname.split('/').filter(Boolean); var surface = 'site'; if (parts[0] === 'blog') { surface = 'blog'; parts.shift(); } raw = surface + '_' + (slug(parts.join('-')) || 'home'); } return slug(raw).slice(0, 40).replace(/[-_]+$/, '') || 'site_home'; } function decorateAppUrl(url) { var record = readRecord(); var handoff = {}; if (record) { handoff.first_touch = record.first_touch; handoff.last_touch = record.last_touch; } if (visitId) handoff.visit_id = visitId; if (!handoff.first_touch && !handoff.visit_id) return false; url.searchParams.set('rp_attr', base64Url(JSON.stringify(handoff))); return true; } /** * The family's acquisition channel, by reading-auth's precedence: the first * touch's campaign tags, else the site that referred it. Null for a visitor * with no recorded touch. */ function channel() { var record = readRecord(); var first = record && record.first_touch; if (!first) return null; if (first.utm_source) { return { source: first.utm_source, medium: first.utm_medium || '', campaign: first.utm_campaign || '', }; } if (first.referrer_host) return { source: first.referrer_host, medium: 'referral', campaign: '' }; return null; } function surfaceSource() { return isBlog() ? 'readpals_blog' : 'readpals_site'; } /** Apple caps ct at 40 characters. */ function appStoreCampaignToken(link) { var ch = channel(); if (!ch) return placementFor(link); var token = slug(ch.campaign ? ch.source + '_' + ch.campaign : ch.source) .slice(0, 40) .replace(/[-_]+$/, ''); return token || placementFor(link); } function decorateAppStoreUrl(url, link) { url.searchParams.set('pt', APP_STORE_PROVIDER_TOKEN); url.searchParams.set('ct', appStoreCampaignToken(link)); url.searchParams.set('mt', '8'); return true; } function decoratePlayUrl(url, link) { var ch = channel(); var referrer = new URLSearchParams(); referrer.set('utm_source', ch ? ch.source : surfaceSource()); var medium = ch ? ch.medium : 'site'; if (medium) referrer.set('utm_medium', medium); if (ch && ch.campaign) referrer.set('utm_campaign', ch.campaign); referrer.set('utm_content', placementFor(link)); url.searchParams.set('referrer', referrer.toString()); return true; } /** Which store a URL points at, for ReadPals only; '' for anything else. */ function storeOf(url) { if (url.hostname === 'apps.apple.com' && new RegExp('/id' + APP_STORE_ID + '(/|$)').test(url.pathname)) { return 'app_store'; } if ( url.hostname === 'play.google.com' && url.pathname === '/store/apps/details' && url.searchParams.get('id') === PLAY_PACKAGE ) { return 'google_play'; } return ''; } /** Returns the decorated href, or null when the link is not ours to touch. */ function decorate(href, link) { var url; try { url = new URL(href, window.location.href); } catch { return null; } var changed = false; var store = storeOf(url); if (appOrigins.indexOf(url.origin) >= 0) { changed = decorateAppUrl(url); } else if (store === 'app_store') { changed = decorateAppStoreUrl(url, link); } else if (store === 'google_play') { changed = decoratePlayUrl(url, link); } return changed ? url.toString() : null; } function announceStoreClick(href, link) { if (!href) return; var store = storeOf(new URL(href)); if (!store) return; document.dispatchEvent( new CustomEvent('rp-attribution:store-click', { detail: { store: store, placement: placementFor(link) } }) ); } function onLinkActivate(event) { try { var path = event.composedPath ? event.composedPath() : [event.target]; for (var i = 0; i < path.length; i++) { var node = path[i]; if (node && node.tagName === 'A' && node.hasAttribute('href')) { var next = decorate(node.getAttribute('href'), node); if (next) node.setAttribute('href', next); announceStoreClick(next, node); return; } } } catch { // Attribution must never break a click. } } // The Skill Sprint embed navigates into the app itself; carry the record there too. function onSprintHandoff(event) { try { var target = event.detail && event.detail.handoffUrl; if (!target || event.defaultPrevented) return; var next = decorate(target, null); if (!next) return; event.preventDefault(); window.location.assign(next); } catch { // Fall through to the embed's own navigation. } } try { captureTouch(); } catch { // A capture failure leaves links undecorated; the page is unaffected. } document.addEventListener('click', onLinkActivate, true); document.addEventListener('auxclick', onLinkActivate, true); document.addEventListener('readpals-skill-sprint:handoff', onSprintHandoff); // Read-only view for the site's analytics, the games, and tests; it holds // nothing the page can't already see. window.rpAttribution = { get: readRecord, channel: channel, /** This page visit's analytics id, or '' when analytics are off. */ visitId: function () { return visitId; }, decorate: function (href, placement) { var link = document.createElement('a'); if (placement) link.setAttribute('data-rp-placement', placement); return decorate(href, link) || href; }, }; })();

Reading for your family

Start reading for free