add base files

.gitignore

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+.DS_Store
+Thumbs.db
+wp-cli.local.yml
+node_modules/
+*.sql
+*.tar.gz
+*.zip
+.idea*

composer.json

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+{
+    "name": "ashhitch/wp-graphql-yoast-seo",
+    "description": "Query Yoast SEO data with wp-graphql",
+    "type": "wordpress-plugin",
+    "license": "GPL-3.0-or-later",
+    "authors": [{
+        "name": "Ash Hitchcock",
+        "email": "[email protected]"
+    }],
+    "require": {
+        "wp-graphql/wp-graphql": ">=0.3.8",
+        "yoast/wordpress-seo": ">=12.3"
+    }
+}

wp-graphql-homepage.php

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+<?php
+/**
+ * Plugin Name:     WPGraphql Homepage
+ * Plugin URI:      http://github.com/ashhitch/wp-graphql-homepage
+ * Description:     A WPGraphQL Extension that adds a root query to the GraphQL schema that returns the front page
+ * Author:          Ash Hitchcock
+ * Author URI:      https://www.ashleyhitchcock.com
+ * Text Domain:     wp-graphql-homepage
+ * Domain Path:     /languages
+ * Version:         1.0.0
+ *
+ * @package         WP_Graphql_Homepage
+ */
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+add_action( 'graphql_register_types', function() {
+
+	register_graphql_field( 'RootQuery', 'homepage', [
+		'type' => 'Page',
+		'description' => __( 'Returns the homepage', 'wp-graphql-homepage' ),
+		'resolve' => function() {
+      $page_on_front = get_option( 'page_on_front', 0 );
+
+			if ($page_on_front == 0 ) {
+        return null;
+      }
+
+      query_posts(array(
+        'p' => $page_on_front,
+        'post_type' => 'page'
+      ));
+      the_post();
+
+      $homepage = $post;
+      wp_reset_query();
+
+			return $homepage;
+		},
+	]);
+
+	register_graphql_field( 'RootQuery', 'pageForPosts', [
+		'type' => 'Page',
+		'description' => __( 'Returns the page for posts', 'wp-graphql-homepage' ),
+		'resolve' => function() {
+      $page_for_posts = get_option( 'page_for_posts', 0 );
+
+			if ($page_for_posts == 0 ) {
+        return null;
+      }
+
+
+      query_posts(array(
+        'p' => $page_for_posts,
+        'post_type' => 'page'
+      ));
+      the_post();
+
+      $postPage = $post;
+      wp_reset_query();
+
+			return $postPage;
+		},
+	]);
+
+} );