PRT-3011 add elastic environment variable (#109)

* PRT-3011 add elastic environment variable

* PRT-3011 use defined variable from prepend file

* PRT-3011 refactor

Author: tundeafolabi

.gitignore

@@ -6,4 +6,6 @@ composer.lock
 /bin/install-local-tests.sh
 /bin/install-wp-tests.sh
 /bin/phpunit-test.sh
-/bin/helpers.sh
+/bin/helpers.sh
+.idea
+.ds_store

inc/elasticpress-client-side.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * ElasticPress Client-Side Search Configuration
+ *
+ * Routes browser-originated search requests (Autosuggest and Instant Results)
+ * directly to the public ElasticPress.io endpoint, bypassing the internal
+ * mtlsproxy which is only accessible server-side.
+ *
+ * Server-side operations (indexing, admin queries, WP_Query integration)
+ * continue to route through the mtlsproxy for authenticated access.
+ *
+ * @package pantheon
+ */
+
+namespace Pantheon\ElasticPress;
+
+if ( ! defined( 'EP_DIRECT_HOST' ) ) {
+	return;
+}
+
+add_filter( 'ep_autosuggest_options', __NAMESPACE__ . '\\filter_autosuggest_options' );
+add_filter( 'ep_instant_results_search_endpoint', __NAMESPACE__ . '\\filter_instant_results_endpoint' );
+
+/**
+ * Override the Autosuggest endpoint URL to use the direct ElasticPress.io host.
+ *
+ * @param array $options The autosuggest options passed to the browser JS.
+ * @return array Modified options with the direct endpoint URL.
+ */
+function filter_autosuggest_options( $options ) {
+	$index = get_post_index_name();
+	if ( ! $index ) {
+		return $options;
+	}
+
+	$options['endpointUrl'] = EP_DIRECT_HOST . '/' . $index . '/autosuggest';
+	return $options;
+}
+
+/**
+ * Filter the Instant Results search endpoint to use the direct ElasticPress.io URL.
+ *
+ * @param string $endpoint The default endpoint path.
+ * @return string The full direct ElasticPress.io endpoint URL.
+ */
+function filter_instant_results_endpoint( $endpoint ) {
+	$index = get_post_index_name();
+	if ( ! $index ) {
+		return $endpoint;
+	}
+
+	return EP_DIRECT_HOST . '/api/v1/search/posts/' . $index;
+}
+
+/**
+ * Get the ElasticPress post index name.
+ *
+ * @return string|false The index name, or false if unavailable.
+ */
+function get_post_index_name() {
+	$post_indexable = \ElasticPress\Indexables::factory()->get( 'post' );
+	if ( ! $post_indexable ) {
+		return false;
+	}
+
+	return $post_indexable->get_index_name();
+}

pantheon.php

@@ -28,6 +28,7 @@
 	if ( defined( 'WP_CLI' ) && WP_CLI ) {
 		require_once 'inc/cli.php';
 	}
+	require_once 'inc/elasticpress-client-side.php';
 	if ( ! defined( 'FS_METHOD' ) ) {
 		/**
 		 * When this constant is not set, WordPress writes and then deletes a

tests/phpunit/bootstrap.php

@@ -19,6 +19,7 @@
 function _manually_load_plugin() {
 	// Set the Pantheon environment variable.
 	$_ENV['PANTHEON_ENVIRONMENT'] = 'dev';
+	define( 'EP_DIRECT_HOST', 'https://test.hosted-elasticpress.io' );
 
 	if ( function_exists( 'is_multisite' ) && is_multisite() ) {
 		putenv( 'FRAMEWORK=wordpress_network' ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.runtime_configuration_putenv

tests/phpunit/test-elasticpress-client-side.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * Tests for ElasticPress client-side search configuration.
+ *
+ * @package pantheon
+ */
+
+/**
+ * Test class for ElasticPress client-side endpoint overrides.
+ */
+class Test_ElasticPress_Client_Side extends WP_UnitTestCase {
+	/**
+	 * Test that EP_DIRECT_HOST is defined.
+	 */
+	public function test_ep_direct_host_defined() {
+		$this->assertTrue( defined( 'EP_DIRECT_HOST' ) );
+		$this->assertSame( 'https://test.hosted-elasticpress.io', EP_DIRECT_HOST );
+	}
+
+	/**
+	 * Test that the autosuggest options filter is registered.
+	 */
+	public function test_autosuggest_filter_registered() {
+		$this->assertNotFalse(
+			has_filter( 'ep_autosuggest_options', 'Pantheon\\ElasticPress\\filter_autosuggest_options' )
+		);
+	}
+
+	/**
+	 * Test that the instant results filter is registered.
+	 */
+	public function test_instant_results_filter_registered() {
+		$this->assertNotFalse(
+			has_filter( 'ep_instant_results_search_endpoint', 'Pantheon\\ElasticPress\\filter_instant_results_endpoint' )
+		);
+	}
+}