closes #74. Adds new Analytics component for GA4 and Chartbeat.

package.json

@@ -41,6 +41,7 @@
     "@storybook/theming": "6.5.9",
     "@sveltejs/vite-plugin-svelte": "^1.0.1",
     "@tsconfig/svelte": "^3.0.0",
+    "@types/gtag.js": "^0.0.12",
     "@types/proper-url-join": "^2.1.1",
     "@types/react-syntax-highlighter": "^15.5.4",
     "@typescript-eslint/eslint-plugin": "^5.33.1",
@@ -237,4 +238,4 @@
     ".": "./dist/index.js"
   },
   "svelte": "./dist/index.js"
-}
+}

src/components/Analytics/Analytics.stories.svelte

@@ -0,0 +1,45 @@
+<script>
+  import { Meta, Template, Story } from '@storybook/addon-svelte-csf';
+
+  // Don't lose the "?raw" in markdown imports!
+  // @ts-ignore
+  import componentDocs from './stories/docs/component.md?raw';
+  // @ts-ignore
+  import environmentsDocs from './stories/docs/environments.md?raw';
+  // @ts-ignore
+  import multipageDocs from './stories/docs/multipage.md?raw';
+
+  import Analytics from './Analytics.svelte';
+
+  import { withComponentDocs, withStoryDocs } from '$docs/utils/withParams.js';
+
+  const meta = {
+    title: 'Components/Analytics',
+    component: Analytics,
+    ...withComponentDocs(componentDocs),
+  };
+</script>
+
+<Meta {...meta} />
+
+<Template let:args>
+  <Analytics {...args} />
+  <div>Nothing to see here</div>
+</Template>
+
+<Story
+  name="Default"
+  args="{{
+    authors: [{ name: 'Jane Doe' }, { name: 'John Doe' }],
+  }}"
+/>
+
+<Story name="Environments" {...withStoryDocs(environmentsDocs)}>
+  <Analytics />
+  <div>Nothing to see here</div>
+</Story>
+
+<Story name="Multipage apps" {...withStoryDocs(multipageDocs)}>
+  <Analytics />
+  <div>Nothing to see here</div>
+</Story>

src/components/Analytics/Analytics.svelte

@@ -0,0 +1,29 @@
+<script context="module">
+  import { registerPageview as registerChartbeatPageview } from './providers/chartbeat';
+  import { registerPageview as registerGAPageview } from './providers/ga';
+
+  /** Register virtual pageviews when using client-side routing in multipage applications. */
+  export function registerPageview() {
+    registerChartbeatPageview();
+    registerGAPageview();
+  }
+</script>
+
+<!-- @component `Analytics` [Read the docs.](https://reuters-graphics.github.io/graphics-components/?path=/docs/components-Analytics--default) -->
+<script lang="ts">
+  interface Author {
+    name: string;
+  }
+  /**
+   * Used to associate a page with its author(s) in Chartbeat.
+   */
+  export let authors: Author[] = [];
+
+  import { onMount } from 'svelte';
+  import { ga, chartbeat } from './providers';
+
+  onMount(() => {
+    ga();
+    chartbeat(authors);
+  });
+</script>

src/components/Analytics/providers/chartbeat.ts

@@ -0,0 +1,46 @@
+// Reuters Chartbeat UID
+const UID = 52639;
+
+/* eslint-disable */
+const attachScript = () => {
+  // If script is already attached, skip
+  if (
+    document.querySelector(
+      'script[src="//static.chartbeat.com/js/chartbeat.js"]'
+    )
+  ) { return; }
+  // ... else attach it.
+  const e = document.createElement('script');
+  const n = document.getElementsByTagName('script')[0];
+  e.type = 'text/javascript';
+  e.async = true;
+  e.src = '//static.chartbeat.com/js/chartbeat.js';
+  n.parentNode.insertBefore(e, n);
+};
+/* eslint-enable */
+
+export default (authors: { name: string }[]) => {
+  // @ts-ignore
+  const config = window._sf_async_config = (window._sf_async_config || {});
+  config.uid = UID;
+  config.domain = 'reuters.com';
+  config.flickerControl = false;
+  config.useCanonical = true;
+  config.useCanonicalDomain = true;
+  config.sections = 'Graphics';
+  config.authors = authors.map((a) => a.name).join(',');
+
+  try {
+    attachScript();
+  } catch (e) { console.warn(`Error initialising Chartbeat Analytics: ${e}`); }
+};
+
+export const registerPageview = () => {
+  // @ts-ignore
+  if (!window.pSUPERFLY) return;
+  // @ts-ignore
+  window.pSUPERFLY({
+    path: window.location.pathname,
+    title: document.title,
+  });
+};

src/components/Analytics/providers/ga.ts

@@ -0,0 +1,45 @@
+// Reuters Google Tag ID
+const GOOGLE_TAG_ID = 'G-W3Q2X6NTNM';
+
+/* eslint-disable */
+const attachScript = () => {
+  // If script is already attached, skip
+  if (
+    document.querySelector(
+      `script[src="https://www.googletagmanager.com/gtag/js?id=${GOOGLE_TAG_ID}"]`
+    )
+  )
+    return;
+  // ... else attach it.
+  const e = document.createElement('script');
+  const n = document.getElementsByTagName('script')[0];
+  e.type = 'text/javascript';
+  e.async = true;
+  e.src = `https://www.googletagmanager.com/gtag/js?id=${GOOGLE_TAG_ID}`;
+  n.parentNode.insertBefore(e, n);
+};
+/* eslint-enable */
+
+export default () => {
+  try {
+    // @ts-ignore
+    window.dataLayer = window.dataLayer || [];
+    if (!window.gtag) {
+      attachScript();
+      /** @type {Gtag.Gtag} */
+      window.gtag = (...args) => {
+        // @ts-ignore
+        window.dataLayer.push(...args);
+      };
+      window.gtag('js', new Date());
+      window.gtag('config', GOOGLE_TAG_ID);
+    }
+  } catch (e) { console.warn(`Error initialising Google Analytics: ${e}`); }
+};
+
+export const registerPageview = () => {
+  if (!window.gtag) return;
+  window.gtag('event', 'page_view', {
+    page_location: window.location.origin + window.location.pathname,
+  });
+};

src/components/Analytics/providers/index.ts

@@ -0,0 +1,2 @@
+export { default as ga } from './ga';
+export { default as chartbeat } from './chartbeat';

src/components/Analytics/stories/docs/component.md

@@ -0,0 +1,11 @@
+Add Google and Chartbeat analytics to your page.
+
+```svelte
+<script>
+  import { Analytics } from '@reuters-graphics/graphics-components';
+
+  const authors = [{ name: 'Jane Doe' }, { name: 'John Doe' }];
+</script>
+
+<Analytics authors="{authors}" />
+```

src/components/Analytics/stories/docs/environments.md

@@ -0,0 +1,17 @@
+Generally, you only want to send page analytics in production environments.
+
+In a SvelteKit context, you can use `$app` stores to restrict when you send analytics.
+
+For example, the following excludes analytics from pages in development or hosted on our preview server:
+
+```svelte
+<script>
+  import { Analytics } from '@reuters-graphics/graphics-components';
+  import { dev } from '$app/environment';
+  import { page } from '$app/stores';
+</script>
+
+{#if !dev && $page.url?.hostname !== 'graphics.thomsonreuters.com'}
+  <Analytics />
+{/if}
+```

src/components/Analytics/stories/docs/multipage.md

@@ -0,0 +1,32 @@
+If you're using analytics to measure a multipage newsapp that uses [client-side routing](https://kit.svelte.dev/docs/glossary#routing), then you may need to trigger analytics after virtual page navigation.
+
+This component also exports a function you can call to register pageviews.
+
+For example, here's how you can use SvelteKit's [`afterNavigate`](https://kit.svelte.dev/docs/modules#$app-navigation-afternavigate) lifecycle to capture additional pageviews:
+
+```svelte
+<script>
+  import {
+    Analytics,
+    registerPageview,
+  } from '@reuters-graphics/graphics-components';
+  import { afterNavigate } from '$app/navigation';
+  import { onMount } from 'svelte';
+
+  let hasMounted = false;
+
+  onMount(() => {
+    hasMounted = true;
+  });
+
+  afterNavigate(() => {
+    // We shouldn't fire on initial page load because the Analytics component
+    // already registers a reader's first pageview. After this component
+    // has mounted, we can be sure that further navigation is virtual and
+    // register pageviews using this function.
+    if (hasMounted) registerPageview();
+  });
+</script>
+
+<Analytics />
+```

src/components/SEO/SEO.svelte

@@ -1,15 +1,9 @@
 <!-- @component `SEO` [Read the docs.](https://reuters-graphics.github.io/graphics-components/?path=/docs/components-SEO--default) -->
 <script lang="ts">
-  import {
-    loadChartbeat,
-    loadGA,
-    loadPublisherTags,
-  } from './analytics/index.js';
-
   /**
    * Base url for the page, which in [Vite-based projects](https://vitejs.dev/guide/build.html#public-base-path)
    * is globally available as `import.meta.env.BASE_URL`.
-   * @required
+   * @requiredx
    * @type {string}
    */
   export let baseUrl: string = '';
@@ -75,10 +69,6 @@
    * Array of authors for the piece. Each author object must have `name` and `url` attributes.
    */
   export let authors: GraphicAuthor[] = [];
-  /**
-   * Whether to inject Google Analytics code for this page.
-   */
-  export let includeAnalytics: boolean = false;
 
   const getOrigin = (baseUrl) => {
     try {
@@ -94,15 +84,6 @@
   $: origin = getOrigin(baseUrl);
   $: canonicalUrl = origin + pageUrl.pathname;
 
-  // Only fire analytics on prod sites
-  $: {
-    if (typeof window !== 'undefined' && includeAnalytics) {
-      loadChartbeat(authors);
-      loadGA(canonicalUrl, seoTitle);
-      loadPublisherTags();
-    }
-  }
-
   const orgLdJson = {
     '@context': 'http://schema.org',
     '@type': 'NewsMediaOrganization',

src/components/SEO/analytics/chartbeat.js

@@ -1,33 +0,0 @@
-/* eslint-disable */
-const attachScript = () => {
-  // If script is already attached, skip
-  if (
-    document.querySelector(
-      'script[src="//static.chartbeat.com/js/chartbeat.js"]'
-    )
-  )
-    return;
-  // ... else attach it.
-  const e = document.createElement('script');
-  const n = document.getElementsByTagName('script')[0];
-  e.type = 'text/javascript';
-  e.async = true;
-  e.src = '//static.chartbeat.com/js/chartbeat.js';
-  n.parentNode.insertBefore(e, n);
-};
-
-export default (authors) => {
-  // @ts-ignore
-  const _sf_async_config = (window._sf_async_config =
-    window._sf_async_config || {});
-  _sf_async_config.uid = 52639;
-  _sf_async_config.domain = 'reuters.com';
-  _sf_async_config.flickerControl = false;
-  _sf_async_config.useCanonical = true;
-  _sf_async_config.useCanonicalDomain = true;
-  _sf_async_config.sections = 'Graphics';
-  _sf_async_config.authors = authors.map((a) => a.name).join(',');
-  try {
-    attachScript();
-  } catch (e) {}
-};

src/components/SEO/analytics/ga.js

@@ -1,40 +0,0 @@
-/* eslint-disable */
-const attachScript = function (i, s, o, g, r, a, m) {
-  i.GoogleAnalyticsObject = r;
-  (i[r] =
-    i[r] ||
-    function () {
-      (i[r].q = i[r].q || []).push(arguments);
-    }),
-    (i[r].l = Date.now());
-  (a = s.createElement(o)), (m = s.getElementsByTagName(o)[0]);
-  a.async = 1;
-  a.src = g;
-  m.parentNode.insertBefore(a, m);
-};
-/* eslint-enable */
-
-export default (page, title) => {
-  try {
-    // @ts-ignore
-    if (!window.ga) {
-      attachScript(
-        window,
-        document,
-        'script',
-        'https://www.google-analytics.com/analytics.js',
-        'ga'
-      );
-
-      // @ts-ignore
-      window.ga('create', 'UA-41619329-3', { cookieDomain: 'auto' });
-      // @ts-ignore
-      window.ga('require', 'linkid', 'linkid.js');
-    }
-    // @ts-ignore
-    window.ga('send', 'pageview', {
-      page,
-      title,
-    });
-  } catch (e) {}
-};

src/components/SEO/analytics/index.js

@@ -1,3 +0,0 @@
-export { default as loadGA } from './ga.js';
-export { default as loadChartbeat } from './chartbeat.js';
-export { default as loadPublisherTags } from './publisherTags.js';

src/components/SEO/analytics/publisherTags.js

@@ -1,34 +0,0 @@
-export default () => {
-  try {
-    const { protocol } = document.location;
-    const gptScript = document.querySelector(
-      `script[src="${protocol}//www.googletagservices.com/tag/js/gpt.js"]`
-    );
-    // Only do this once.
-    if (gptScript) return;
-    const googletag = window.googletag || {};
-    googletag.cmd = googletag.cmd || [];
-    (function () {
-      const gads = document.createElement('script');
-      gads.async = true;
-      gads.type = 'text/javascript';
-      const useSSL = document.location.protocol === 'https:';
-      gads.src =
-        (useSSL ? 'https:' : 'http:') +
-        '//www.googletagservices.com/tag/js/gpt.js';
-      const node = document.getElementsByTagName('script')[0];
-      node.parentNode.insertBefore(gads, node);
-    })();
-    googletag.cmd.push(function () {
-      googletag
-        .defineSlot(
-          '/4735792/reuters_investigates',
-          [[300, 250]],
-          'div-gpt-ad-1441822201033-0'
-        )
-        .addService(googletag.pubads());
-      googletag.pubads().enableSingleRequest();
-      googletag.enableServices();
-    });
-  } catch (e) {}
-};

src/components/SEO/stories/docs/component.md

@@ -22,6 +22,5 @@ The `SEO` component adds essential metadata to published pages.
     { name: 'Jane Doe', url: 'https://twitter.com/JaneDoe' },
     { name: 'John Doe', url: 'https://twitter.com/JohnDoe' },
   ]}"
-  includeAnalytics="{true}"
 />
 ```

src/components/SEO/stories/docs/quickit.md

@@ -25,6 +25,5 @@ Most of the fields are filled in by other sources, like your Google Doc and pack
   publishTime="{pkg?.reuters?.graphic?.published}"
   updateTime="{pkg?.reuters?.graphic?.updated}"
   authors="{pkg?.reuters?.graphic?.authors}"
-  includeAnalytics="{$page.url.hostname === 'graphics.reuters.com'}"
 />
 ```

src/index.js

@@ -1,4 +1,5 @@
 // Components
+export { default as Analytics, registerPageview } from './components/Analytics/Analytics.svelte';
 export { default as Article } from './components/Article/Article.svelte';
 export { default as BeforeAfter } from './components/BeforeAfter/BeforeAfter.svelte';
 export { default as Block } from './components/Block/Block.svelte';

yarn.lock

@@ -2729,6 +2729,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/gtag.js@^0.0.12":
+  version "0.0.12"
+  resolved "https://registry.yarnpkg.com/@types/gtag.js/-/gtag.js-0.0.12.tgz#095122edca896689bdfcdd73b057e23064d23572"
+  integrity sha512-YQV9bUsemkzG81Ea295/nF/5GijnD2Af7QhEofh7xu+kvCN6RdodgNwwGWXB5GMI3NoyvQo0odNctoH/qLMIpg==
+
 "@types/hast@^2.0.0":
   version "2.3.4"
   resolved "https://registry.yarnpkg.com/@types/hast/-/hast-2.3.4.tgz#8aa5ef92c117d20d974a82bdfb6a648b08c0bafc"