Add User_Theme class for managing user-defined styles and settings

[MAILPOET-6335]

packages/php/email-editor/tests/integration/Engine/User_Theme_Test.php

@@ -0,0 +1,87 @@
+<?php
+/**
+ * This file is part of the MailPoet Email Editor package.
+ *
+ * @package MailPoet\EmailEditor
+ */
+
+declare(strict_types = 1);
+namespace MailPoet\EmailEditor\Engine;
+
+/**
+ * Integration test for User Theme class
+ */
+class User_Theme_Test extends \MailPoetTest {
+	/**
+	 * Instance of User_Theme created before each test.
+	 *
+	 * @var User_Theme
+	 */
+	private User_Theme $user_theme;
+
+	/**
+	 * Set up before each test.
+	 */
+	protected function _before(): void {
+		parent::_before();
+		$this->user_theme = new User_Theme();
+	}
+
+	/**
+	 * Test it can create and return a user theme post
+	 */
+	public function testItCreatesUserThemePostLazily(): void {
+		$post = $this->user_theme->get_user_theme_post();
+		$this->assertInstanceOf( \WP_Post::class, $post );
+		$post_content = json_decode( $post->post_content, true );
+		$this->assertIsArray( $post_content );
+		$this->assertArrayHasKey( 'version', $post_content );
+		$this->assertEquals( 3, $post_content['version'] );
+		$this->assertArrayHasKey( 'isGlobalStylesUserThemeJSON', $post_content );
+		$this->assertTrue( $post_content['isGlobalStylesUserThemeJSON'] );
+	}
+
+	/**
+	 * Test it fetches previously stored data
+	 */
+	public function testItFetchesPreviouslyStoredData(): void {
+		$styles_data = array(
+			'version'                     => 3,
+			'isGlobalStylesUserThemeJSON' => true,
+			'styles'                      => array(
+				'color' => array(
+					'background' => '#000000',
+					'text'       => '#ffffff',
+				),
+			),
+		);
+		$post_data   = array(
+			'post_title'   => __( 'Custom Email Styles', 'mailpoet' ),
+			'post_name'    => 'wp-global-styles-mailpoet-email',
+			'post_content' => (string) wp_json_encode( $styles_data, JSON_FORCE_OBJECT ),
+			'post_status'  => 'publish',
+			'post_type'    => 'wp_global_styles',
+		);
+		wp_insert_post( $post_data );
+
+		$post = $this->user_theme->get_user_theme_post();
+		$this->assertInstanceOf( \WP_Post::class, $post );
+		$post_content = json_decode( $post->post_content, true );
+		$this->assertIsArray( $post_content );
+		$this->assertArrayHasKey( 'version', $post_content );
+		$this->assertEquals( 3, $post_content['version'] );
+		$this->assertArrayHasKey( 'isGlobalStylesUserThemeJSON', $post_content );
+		$this->assertTrue( $post_content['isGlobalStylesUserThemeJSON'] );
+		$this->assertEquals( $styles_data['styles'], $post_content['styles'] );
+	}
+
+	/**
+	 * Test it returns the user WP_Theme_JSON
+	 */
+	public function testItCreatesThemeJson(): void {
+		$theme = $this->user_theme->get_theme();
+		$this->assertInstanceOf( \WP_Theme_JSON::class, $theme );
+		$raw = $theme->get_raw_data();
+		$this->assertArrayHasKey( 'version', $raw );
+	}
+}