Merge pull request #10 from wp-graphql/issue-4-hooks

First pass at creating a more extensible plugin

Author: josephfusco

ACTIONS_AND_FILTERS.md

@@ -0,0 +1,24 @@
+# Actions & Filters
+
+-> [Original documentation](https://www.wpgraphql.com/docs/customizing-wpgraphiql)
+
+_legend_ 🎉 = new
+
+## PHP Actions
+
+- `wpgraphqlide_enqueue_script` ([enqueue_graphiql_extension](https://www.wpgraphql.com/docs/customizing-wpgraphiql#enqueue_graphiql_extension))
+
+## PHP Filters
+
+- `wpgraphqlide_capability_required` 🎉
+- `wpgraphqlide_context` 🎉
+- `wpgraphqlide_external_fragments` ([graphiql_external_fragments](https://www.wpgraphql.com/docs/customizing-wpgraphiql#graphiql_external_fragments))
+
+## JavaScript Actions
+
+- `wpgraphqlide_destroyed` 🎉
+- `wpgraphqlide_rendered` ([graphiql_rendered](https://www.wpgraphql.com/docs/customizing-wpgraphiql#graphiql_rendered))
+
+## JavaScript Filters
+
+...

README.md

@@ -31,3 +31,7 @@ GraphiQL IDE has intentionally been updated to read "GraphQL IDE", which feels m
     ```
 
 Builds are only required for JS updates as the plugin's CSS is directly enqueued.
+
+## Custom Hooks
+
+See [ACTIONS_AND_FILTERS.md].

package-lock.json

@@ -17,6 +17,7 @@
 	},
 	"dependencies": {
 		"@wordpress/element": "^5.23.0",
+		"@wordpress/hooks": "^3.49.0",
 		"graphiql": "^3.0.10",
 		"graphql-ws": "^5.14.2",
 		"vaul": "^0.7.9"

package.json

@@ -1,15 +1,45 @@
-import { useState } from '@wordpress/element';
+import { useState, useEffect } from '@wordpress/element';
 import { EditorDrawer } from './components/EditorDrawer';
 import { Editor } from './components/Editor';
 
+// Assuming wp.hooks is globally available through WordPress's script enqueueing mechanism.
+const { doAction } = wp.hooks;
+
+/**
+ * The main application component.
+ *
+ * @returns {JSX.Element} The application component.
+ */
 export function App() {
-	const [ drawerOpen, setDrawerOpen ] = useState( false );
-
-	return (
-		<div className="AppRoot">
-			<EditorDrawer open={ drawerOpen } setDrawerOpen={ setDrawerOpen }>
-				<Editor setDrawerOpen={ setDrawerOpen } />
-			</EditorDrawer>
-		</div>
-	);
+    const [drawerOpen, setDrawerOpen] = useState(false);
+
+    useEffect(() => {
+        /**
+         * Perform actions on component mount.
+         *
+         * Triggers a custom action 'wpgraphqlide_rendered' when the App component mounts,
+         * allowing plugins or themes to hook into this event. The action passes
+         * the current state of `drawerOpen` to any listeners, providing context
+         * about the application's UI state.
+         */
+        doAction('wpgraphqlide_rendered', drawerOpen);
+
+        /**
+         * Cleanup action on component unmount.
+         *
+         * Returns a cleanup function that triggers the 'wpgraphqlide_destroyed' action,
+         * signaling that the App component is about to unmount. This allows for
+         * any necessary cleanup or teardown operations in response to the App
+         * component's lifecycle.
+         */
+        return () => doAction('wpgraphqlide_destroyed');
+    }, [drawerOpen]);
+
+    return (
+        <div className="AppRoot">
+            <EditorDrawer open={ drawerOpen } setDrawerOpen={ setDrawerOpen }>
+                <Editor setDrawerOpen={setDrawerOpen} />
+            </EditorDrawer>
+        </div>
+    );
 }

src/App.jsx

@@ -1,5 +1,7 @@
 /* global WPGRAPHQL_IDE_DATA */
 import { createRoot } from '@wordpress/element';
+import { createHooks } from '@wordpress/hooks';
+
 import { App } from './App';
 
 /**
@@ -18,5 +20,8 @@ if ( rootElement ) {
 	root.render( <App /> );
 }
 
+// Initialize hook system.
+App.hooks = createHooks();
+
 // Expose app as a global variable to utilize in gutenberg.
 window.WPGraphQLIDE = App;

src/index.js

@@ -121,7 +121,9 @@ function enqueue_react_app_with_styles(): void {
         'wp-i18n',
     ];
 
-    $version = plugin_version();
+    $app_context = get_app_context();
+
+    $version = get_plugin_header( 'Version' );
 
     wp_enqueue_script(
         'wpgraphql-ide-app',
@@ -138,28 +140,52 @@ function enqueue_react_app_with_styles(): void {
             'nonce'           => wp_create_nonce( 'wp_rest' ),
             'graphqlEndpoint' => trailingslashit( site_url() ) . 'index.php?' . \WPGraphQL\Router::$route,
             'rootElementId'   => WPGRAPHQL_IDE_ROOT_ELEMENT_ID,
+            'context'         => $app_context, 
         ]
     );
 
     wp_enqueue_style( 'wpgraphql-ide-app', plugins_url( 'build/index.css', __FILE__ ), [], $version );
     // Avoid running custom styles through a build process for an improved developer experience.
     wp_enqueue_style( 'wpgraphql-ide', plugins_url( 'styles/wpgraphql-ide.css', __FILE__ ), [], $version );
+
+    // Extensions looking to extend GraphiQL can hook in here,
+    // after the window object is established, but before the App renders
+    do_action( 'wpgraphqlide_enqueue_script', $app_context );
 }
 add_action( 'admin_enqueue_scripts', __NAMESPACE__ . '\\enqueue_react_app_with_styles' );
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\\enqueue_react_app_with_styles' );
 
 /**
- * Retrieves the version of the current plugin.
+ * Retrieves the specific header of this plugin.
  *
- * @return string The version number of the plugin. Returns an empty string if the version is not found.
+ * @param string The plugin data key.
+ * @return string|null The version number of the plugin. Returns an empty string if the version is not found.
  */
-function plugin_version(): string {
+function get_plugin_header( $key = '' ): ?string {
     if ( ! function_exists( 'get_plugin_data' ) ) {
         require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
     }
 
+    if ( empty( $key ) ) {
+        return null;
+    }
+
     $plugin_data = get_plugin_data( __FILE__ );
-    $version     = $plugin_data['Version'];
 
-    return $version;
+    return $plugin_data[ $key ] ?? null;
+}
+
+/**
+ * Retrieves app context.
+ * 
+ * @return array The possibly filtered app context array.
+ */
+function get_app_context() {
+    $context = apply_filters( 'wpgraphqlide_context', [
+        'pluginVersion'     => get_plugin_header( 'Version' ),
+        'pluginName'        => get_plugin_header( 'Name' ),
+        'externalFragments' => apply_filters( 'wpgraphqlide_external_fragments', [] )
+    ]);
+
+    return $context;
 }