Add migration guide for canonical URL replacement

.github/hookdoc-tmpl/README.md

@@ -4,6 +4,10 @@ This resource is generated documentation on actions and filters found in the Dis
 
 For more information about using Distributor with WordPress, please see the [Distributor website](https://distributorplugin.com/).
 
+## Migrating to version 2.0
+
+Version 2.0 of Distributor contains breaking changes. Please review the <a href="./tutorial-migration-guide-version-1-to-version-2.html">migration guide</a> tutorial and follow any steps required.
+
 To report an issue with Distributor or contribute back to the project, please visit the [GitHub repository](https://github.com/10up/distributor/).
 
 <a href="http://10up.com/contact/" class="banner"><img src="https://10updotcom-wpengine.s3.amazonaws.com/uploads/2016/10/10up-Github-Banner.png" width="850"></a>

docs/migration-guide-version-1-to-version-2.md

@@ -0,0 +1,25 @@
+## Migration Guide Version 1 to Version 2.
+
+Version 2 of Distributor includes a number of breaking changes that will require updates to custom code you may have written for distributor.
+
+### Remove canonical links for both Internal and External Connections
+
+The code snippet required to prevent sites from displaying the source post as canonical URLs for distributed posts has changed.
+
+If you have implemented this using the code snippet from our tutorial file, please update your code to the following:
+
+```php
+/**
+ * Stop Distributor from changing the canonical links.
+ *
+ * This removes Distributor's canonical functionality from both Internal and
+ * External Connections.
+ *
+ * This accounts for sites using either WordPress or Yoast SEO to generate the
+ * canonical URL.
+ */
+add_action( 'plugins_loaded', function() {
+	add_action( 'get_canonical_url', '\\Distributor\\Hooks\\get_canonical_url', 10, 2 );
+	add_action( 'wpseo_canonical', '\\Distributor\\Hooks\\wpseo_canonical', 10, 2 );
+} );
+```

docs/snippets.md

@@ -62,16 +62,16 @@ function client_prefix_filter_authorized_sites( array $authorized_sites, string
 /**
  * Stop Distributor from changing the canonical links.
  *
- * This removes Distributor's canonical functionality from
- * both Internal and External Connections and for those sites
- * that use Yoast SEO.
+ * This removes Distributor's canonical functionality from both Internal and
+ * External Connections.
+ *
+ * This accounts for sites using either WordPress or Yoast SEO to generate the
+ * canonical URL.
  */
-add_action( 'template_redirect', function () {
-    remove_filter( 'get_canonical_url', array( '\Distributor\InternalConnections\NetworkSiteConnection', 'canonical_url' ), 10, 2 );
-    remove_filter( 'wpseo_canonical', array( '\Distributor\InternalConnections\NetworkSiteConnection', 'wpseo_canonical_url' ) );
-    remove_filter( 'get_canonical_url', array( '\Distributor\ExternalConnections\WordPressExternalConnection', 'canonical_url' ), 10, 2 );
-    remove_filter( 'wpseo_canonical', array( '\Distributor\ExternalConnections\WordPressExternalConnection', 'wpseo_canonical_url' ) );
-}, 20 );
+add_action( 'plugins_loaded', function() {
+	add_action( 'get_canonical_url', '\\Distributor\\Hooks\\get_canonical_url', 10, 2 );
+	add_action( 'wpseo_canonical', '\\Distributor\\Hooks\\wpseo_canonical', 10, 2 );
+} );
 ```
 
 ### Push original publication date