Extracted any logic that may need to be tested from the api class

admin/class-create-theme.php

@@ -13,7 +13,7 @@
 require_once __DIR__ . '/create-theme/theme-readme.php';
 require_once __DIR__ . '/create-theme/theme-form.php';
 require_once __DIR__ . '/create-theme/form-messages.php';
-
+require_once __DIR__ . '/create-theme/theme-create.php';
 /**
  * The admin-specific functionality of the plugin.
  *

admin/create-theme/theme-create.php

@@ -0,0 +1,111 @@
+<?php
+
+class Theme_Create {
+
+	const ALLOWED_SCREENSHOT_TYPES = array(
+		'png' => 'image/png',
+	);
+
+	public static function clone_current_theme( $theme ) {
+
+		// Create theme directory.
+		$new_theme_path = get_theme_root() . DIRECTORY_SEPARATOR . $theme['slug'];
+
+		if ( $theme['subfolder'] ) {
+			$new_theme_path = get_theme_root() . DIRECTORY_SEPARATOR . $theme['subfolder'] . DIRECTORY_SEPARATOR . $theme['slug'];
+		}
+
+		if ( file_exists( $new_theme_path ) ) {
+			return new WP_Error( 'theme_already_exists', __( 'Theme already exists.', 'create-block-theme' ) );
+		}
+
+		wp_mkdir_p( $new_theme_path );
+
+		// Copy theme files.
+		Theme_Utils::clone_theme_to_folder( $new_theme_path, $theme['slug'], $theme['name'] );
+		Theme_Utils::add_templates_to_folder( $new_theme_path, 'all', $theme['slug'] );
+
+		file_put_contents( $new_theme_path . DIRECTORY_SEPARATOR . 'theme.json', MY_Theme_JSON_Resolver::export_theme_data( 'all' ) );
+
+		if ( $theme['subfolder'] ) {
+			switch_theme( $theme['subfolder'] . '/' . $theme['slug'] );
+		} else {
+			switch_theme( $theme['slug'] );
+		}
+	}
+
+	public static function create_blank_theme( $theme, $screenshot ) {
+
+		// Create theme directory.
+		$source           = plugin_dir_path( __DIR__ ) . 'assets/boilerplate';
+		$blank_theme_path = get_theme_root() . DIRECTORY_SEPARATOR . $theme['subfolder'] . DIRECTORY_SEPARATOR . $theme['slug'];
+
+		if ( file_exists( $blank_theme_path ) ) {
+			return new WP_Error( 'theme_already_exists', __( 'Theme already exists.', 'create-block-theme' ) );
+		}
+
+		wp_mkdir_p( $blank_theme_path );
+
+		// Add readme.txt.
+		file_put_contents(
+			$blank_theme_path . DIRECTORY_SEPARATOR . 'readme.txt',
+			Theme_Readme::build_readme_txt( $theme )
+		);
+
+		// Add new metadata.
+		$css_contents = Theme_Styles::build_child_style_css( $theme );
+
+		// Add style.css.
+		file_put_contents(
+			$blank_theme_path . DIRECTORY_SEPARATOR . 'style.css',
+			$css_contents
+		);
+
+		$iterator = new \RecursiveIteratorIterator(
+			new \RecursiveDirectoryIterator( $source, \RecursiveDirectoryIterator::SKIP_DOTS ),
+			\RecursiveIteratorIterator::SELF_FIRST
+		);
+
+		foreach (
+			$iterator as $item
+			) {
+			if ( $item->isDir() ) {
+				wp_mkdir_p( $blank_theme_path . DIRECTORY_SEPARATOR . $iterator->getSubPathname() );
+			} else {
+				copy( $item, $blank_theme_path . DIRECTORY_SEPARATOR . $iterator->getSubPathname() );
+			}
+		}
+
+		// Overwrite default screenshot if one is provided.
+		if ( static::is_valid_screenshot( $screenshot ) ) {
+			file_put_contents(
+				$blank_theme_path . DIRECTORY_SEPARATOR . 'screenshot.png',
+				file_get_contents( $screenshot['tmp_name'] )
+			);
+		}
+
+		if ( ! defined( 'IS_GUTENBERG_PLUGIN' ) ) {
+			global $wp_version;
+			$theme_json_version = 'wp/' . substr( $wp_version, 0, 3 );
+			$schema             = '"$schema": "https://schemas.wp.org/' . $theme_json_version . '/theme.json"';
+			$theme_json_path    = $blank_theme_path . DIRECTORY_SEPARATOR . 'theme.json';
+			$theme_json_string  = file_get_contents( $theme_json_path );
+			$theme_json_string  = str_replace( '"$schema": "https://schemas.wp.org/trunk/theme.json"', $schema, $theme_json_string );
+			file_put_contents( $theme_json_path, $theme_json_string );
+		}
+
+		if ( $theme['subfolder'] ) {
+			switch_theme( $theme['subfolder'] . '/' . $theme['slug'] );
+		} else {
+			switch_theme( $theme['slug'] );
+		}
+	}
+
+	private static function is_valid_screenshot( $file ) {
+		$filetype = wp_check_filetype( $file['name'], self::ALLOWED_SCREENSHOT_TYPES );
+		if ( is_uploaded_file( $file['tmp_name'] ) && in_array( $filetype['type'], self::ALLOWED_SCREENSHOT_TYPES, true ) && $file['size'] < 2097152 ) {
+			return 1;
+		}
+		return 0;
+	}
+}

admin/create-theme/theme-utils.php

@@ -202,4 +202,51 @@ public static function get_readme_data() {
 		return $readme_file_details;
 	}
 
+
+	/**
+	 * Relocate the theme to a new folder and activate the newly relocated theme.
+	 */
+	public static function relocate_theme( $new_theme_subfolder ) {
+
+		$current_theme_subfolder = '';
+		$theme_dir               = get_stylesheet();
+
+		$source      = get_theme_root() . DIRECTORY_SEPARATOR . $theme_dir;
+		$destination = get_theme_root() . DIRECTORY_SEPARATOR . $theme_dir;
+
+		if ( str_contains( get_stylesheet(), '/' ) ) {
+			$current_theme_subfolder = substr( get_stylesheet(), 0, strrpos( get_stylesheet(), '/' ) );
+			$theme_dir               = substr( get_stylesheet(), strrpos( get_stylesheet(), '/' ) + 1 );
+			$source                  = get_theme_root() . DIRECTORY_SEPARATOR . $current_theme_subfolder . DIRECTORY_SEPARATOR . $theme_dir;
+			$destination             = get_theme_root() . DIRECTORY_SEPARATOR . $theme_dir;
+		}
+
+		if ( $new_theme_subfolder ) {
+			$destination = get_theme_root() . DIRECTORY_SEPARATOR . $new_theme_subfolder . DIRECTORY_SEPARATOR . $theme_dir;
+			wp_mkdir_p( get_theme_root() . DIRECTORY_SEPARATOR . $new_theme_subfolder );
+		}
+
+		if ( $source === $destination ) {
+			return;
+		}
+
+		global $wp_filesystem;
+		if ( ! $wp_filesystem ) {
+			require_once ABSPATH . 'wp-admin/includes/file.php';
+			WP_Filesystem();
+		}
+
+		$success = move_dir( $source, $destination, false );
+
+		if ( ! $success ) {
+			return new \WP_Error( 'problem_moving', __( 'There was a problem moving the theme', 'create-block-theme' ) );
+		}
+
+		if ( $new_theme_subfolder ) {
+			switch_theme( $new_theme_subfolder . '/' . $theme_dir );
+		} else {
+			switch_theme( $theme_dir );
+		}
+	}
+
 }