Merge pull request #146 from codediodeio/analytics

analytics: PageView component

Author: codediodeio

README.md

@@ -2,7 +2,7 @@
 
 A minimal, yet powerful library that puts realtime Firebase data into Svelte stores.
 
-[Documentation](https://sveltefire.fireship.io)
+[Full Documentation](https://sveltefire.fireship.io)
 
 ```svelte
 <!-- 1. 🔥 Firebase App -->
@@ -22,17 +22,6 @@ A minimal, yet powerful library that puts realtime Firebase data into Svelte sto
       <Collection ref={postRef.path + '/comments'} let:data={comments}>
         {#each comments as comment}
 
-        {/each}
-
-    <!-- 3 (b). 📜 Get a Realtime Database node owned by a user -->
-    <Node path={`posts/${user.uid}`} let:data={post} let:ref={postRef}>
-
-      <h2>{post.title}</h2>
-
-      <!-- 4 (b). 💬 Get all the comments in its subnodes -->
-      <NodeList path={postRef.path + '/comments'} let:data={comments}>
-        {#each comments as comment}
-
         {/each}
 ...
 ```
@@ -46,6 +35,7 @@ Svelte makes it possible to dramatically simplify the way developers work with F
 - Better TypeScript experience for Firebase
 - Handle complex relational data between Auth, Firestore, and Realtime Database
 - Easily hydrate SvelteKit server data into a realtime Firebase stream
+- Simple Google Analytics integration for SvelteKit
 
 ## Quick Start
 
@@ -60,12 +50,14 @@ import { initializeApp } from "firebase/app";
 import { getFirestore } from "firebase/firestore";
 import { getDatabase } from "firebase/database";
 import { getAuth } from "firebase/auth";
+import { getAnalytics } from "firebase/analytics";
 
 // Initialize Firebase
 const app = initializeApp(/* your firebase config */);
 export const db = getFirestore(app);
 export const rtdb = getDatabase(app);
 export const auth = getAuth(app);
+export const auth = getAnalytics(app);
 ```
 
 2. Get the Current user
@@ -98,6 +90,24 @@ Use the `$` as much as you want - it will only result in one Firebase read reque
 
 Or better yet, use the built in `Doc` and `Collection` components for Firestore, or `Node` and `NodeList` components for Realtime Database. See below.
 
+4. Add Firebase/Google Analytics
+
+Easily generate a `page_view` event on every route change with SvelteKit layouts - works for both client and server rendered pages.
+
+```svelte
+<!-- +layout.svelte  --> 
+<script lang="ts">
+  import { page } from "$app/stores";
+  import { PageView } from "sveltefire";
+</script>
+
+<slot />
+
+{#key $page.route.id}
+  <PageView />
+{/key}
+```
+
 ## Stores
 
 Stores are the building blocks of SvelteFire.

docs/src/components/SideNav.astro

@@ -27,7 +27,7 @@
     <li><a href="/rtdb/node-component">&ltNode&gt</a></li>
     <li><a href="/rtdb/node-list-component">&ltNodeList&gt</a></li>
     <li class="heading">analytics</li>
-    <li><a href="/guide/todo">&ltPageView&gt</a></li>
+    <li><a href="/analytics/page-view-component">&ltPageView&gt</a></li>
   </ul>
 </nav>
 

docs/src/pages/analytics/page-view-component.md

@@ -0,0 +1,52 @@
+---
+title: PageView Component
+pubDate: 2023-12-23
+description: SvelteFire PageView Component API reference
+layout: ../../layouts/MainLayout.astro
+---
+
+# PageView
+
+The `PageView` component logs a Google analytics `page_view` event when it is mounted.
+
+### Slot Props
+
+- `eventName` - (default: 'page_view') Set the current user as the userId in Google Analytics
+- `setUser` - (default: true) Set the current user as the userId in Google Analytics
+- `customParams` - (optional) custom parameters to pass to the `signIn` function
+
+### Layout Example (recommended)
+
+The most efficient way to integrate Firebase Analytics is to log events from a layout component. This will ensure that every route change is logged, both on the client and server. Make sure to `key` the `PageView` component so that it is re-mounted on every route change.
+
+```svelte
+<!-- +layout.svelte  --> 
+<script lang="ts">
+  import { page } from "$app/stores";
+  import { PageView } from "sveltefire";
+</script>
+
+<slot />
+
+{#key $page.route.id}
+  <PageView />
+{/key}
+```
+
+### Page Example
+
+For fine-grained control, you can include `PageView` on a page-by-page basis. This is useful when sending custom parameters.
+
+
+```svelte
+<!-- +page.svelte  --> 
+<script lang="ts">
+    const myData = {
+        guild: 'griffindor',
+        currency: 'gpb'
+    }
+</script>
+
+
+<PageView eventName="my_page_view" customParams={myData} setUser={false} />
+```

src/lib/components/FirebaseApp.svelte

@@ -4,13 +4,15 @@
   import type { Firestore } from "firebase/firestore";
   import type { Database } from "firebase/database";
   import type { FirebaseStorage } from "firebase/storage";
+  import type { Analytics } from "firebase/analytics";
 
   export let firestore: Firestore;
   export let rtdb: Database;
   export let auth: Auth;
   export let storage: FirebaseStorage;
+  export let analytics: Analytics | null;
 
-  setFirebaseContext({ firestore, rtdb, auth, storage });
+  setFirebaseContext({ firestore, rtdb, auth, storage, analytics });
 </script>
 
 <slot />

src/lib/components/PageView.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+  import { logEvent, setUserId, isSupported } from "firebase/analytics";
+  import { getFirebaseContext } from "$lib/index.js";
+  import { onMount } from "svelte";
+
+  export let eventName = "page_view";
+  export let setUser = true;
+  export let customParams: Record<string, unknown> = {};
+
+  const analytics = getFirebaseContext().analytics!;
+  const auth = getFirebaseContext().auth!;
+
+  onMount(async () => {
+    if (!(await isSupported())) {
+      return;
+    }
+    if (setUser) {
+      setUserId(analytics, auth.currentUser?.uid ?? null);
+    }
+    logEvent(analytics, eventName, {
+      page_location: window.location.href,
+      page_path: window.location.pathname,
+      page_title: document.title,
+      ...customParams,
+    });
+  });
+</script>

src/lib/index.js

@@ -8,11 +8,12 @@ import SignedOut from './components/SignedOut.svelte';
 import DownloadURL from './components/DownloadURL.svelte';
 import StorageList from './components/StorageList.svelte';
 import UploadTask from './components/UploadTask.svelte';
-import { userStore } from './stores/auth.js';
-import { docStore, collectionStore  } from './stores/firestore.js';
-import { nodeStore, nodeListStore } from './stores/rtdb.js';
-import { getFirebaseContext } from './stores/sdk.js';
-import { downloadUrlStore, storageListStore, uploadTaskStore } from './stores/storage.js';
+import PageView from './components/PageView.svelte';
+import { userStore } from './stores/auth';
+import { docStore, collectionStore  } from './stores/firestore';
+import { nodeStore, nodeListStore } from './stores/rtdb';
+import { getFirebaseContext } from './stores/sdk';
+import { downloadUrlStore, storageListStore, uploadTaskStore } from './stores/storage';
 
 export {
     Doc,
@@ -24,6 +25,7 @@ export {
     UploadTask,
     StorageList,
     DownloadURL,
+    PageView,
     downloadUrlStore,
     storageListStore,
     uploadTaskStore,

src/lib/stores/auth.ts

@@ -1,5 +1,4 @@
 import { writable } from "svelte/store";
-import { getFirebaseContext } from "./sdk.js";
 import { onAuthStateChanged, type Auth } from "firebase/auth";
 
 /**

src/lib/stores/sdk.ts

@@ -3,12 +3,14 @@ import type { Database } from "firebase/database";
 import type { Auth } from "firebase/auth";
 import { getContext, setContext } from "svelte";
 import type { FirebaseStorage } from "firebase/storage";
+import type { Analytics } from "firebase/analytics";
 
 export interface FirebaseSDKContext {
   auth?: Auth;
   firestore?: Firestore;
   rtdb?: Database;
   storage?: FirebaseStorage;
+  analytics?: Analytics | null;
 }
 
 export const contextKey = "firebase";

src/routes/+layout.svelte

@@ -1,8 +1,8 @@
 <script lang="ts">
   import FirebaseApp from "$lib/components/FirebaseApp.svelte";
-  import { db as firestore, auth, rtdb, storage } from "./firebase.js";
+  import { db as firestore, auth, rtdb, storage, analytics } from "./firebase.js";
 </script>
 
-<FirebaseApp {auth} {firestore} {rtdb} {storage}>
+<FirebaseApp {auth} {firestore} {rtdb} {storage} {analytics}>
   <slot />
 </FirebaseApp>

src/routes/+page.svelte

@@ -12,6 +12,7 @@
   <li><a href="/rtdb-test">Realtime Database Test</a></li>
   <li><a href="/ssr-test">SSR Test</a></li>
   <li><a href="/storage-test">Storage Test</a></li>
+  <li><a href="/analytics-test">Analytics Test</a></li>
 </ul>
 <ul>
   <li data-testid="auth">Auth Context: {!!ctx.auth}</li>