add get single tax class, support cli tax class delete

includes/cli/class-wc-cli-rest-command.php

@@ -144,13 +144,18 @@ class WC_CLI_REST_Command {
 	 */
 	public function delete_item( $args, $assoc_args ) {
 		list( $status, $body ) = $this->do_request( 'DELETE', $this->get_filled_route( $args ), $assoc_args );
+		$object_id = isset( $body['id'] ) ? $body['id'] : '';
+		if ( ! $object_id && isset( $body['slug'] ) ) {
+			$object_id = $body['slug'];
+		}
+
 		if ( \WP_CLI\Utils\get_flag_value( $assoc_args, 'porcelain' ) ) {
-			WP_CLI::line( $body['id'] );
+			WP_CLI::line( $object_id );
 		} else {
 			if ( empty( $assoc_args['force'] ) ) {
-				WP_CLI::success( __( 'Trashed', 'woocommerce' ) . " {$this->name} {$body['id']}" );
+				WP_CLI::success( __( 'Trashed', 'woocommerce' ) . " {$this->name} {$object_id}" );
 			} else {
-				WP_CLI::success( __( 'Deleted', 'woocommerce' ) . " {$this->name} {$body['id']}." );
+				WP_CLI::success( __( 'Deleted', 'woocommerce' ) . " {$this->name} {$object_id}." );
 			}
 		}
 	}
@@ -404,7 +409,7 @@ EOT;
 
 		foreach ( $this->get_supported_ids() as $id_name => $id_desc ) {
 			if ( 'id' !== $id_name && strpos( $route, '<' . $id_name . '>' ) !== false && ! empty( $args ) ) {
-				$route                = str_replace( '(?P<' . $id_name . '>[\d]+)', $args[0], $route );
+				$route                = str_replace( array( '(?P<' . $id_name . '>[\d]+)', '(?P<' . $id_name . '>\w[\w\s\-]*)' ), $args[0], $route );
 				$supported_id_matched = true;
 			}
 		}

includes/cli/class-wc-cli-runner.php

@@ -115,10 +115,10 @@ class WC_CLI_Runner {
 			'zone_id'      => __( 'Zone ID.', 'woocommerce' ),
 			'instance_id'  => __( 'Instance ID.', 'woocommerce' ),
 			'id'           => __( 'The ID for the resource.', 'woocommerce' ),
+			'slug'         => __( 'The slug for the resource.', 'woocommerce' ),
 		);
 		$rest_command->set_supported_ids( $supported_ids );
 		$positional_args = array_keys( $supported_ids );
-
 		$parent             = "wc {$route_data['schema']['title']}";
 		$supported_commands = array();
 

includes/rest-api/Controllers/Version1/class-wc-rest-tax-classes-v1-controller.php

@@ -63,6 +63,11 @@ class WC_REST_Tax_Classes_V1_Controller extends WC_REST_Controller {
 					'type'        => 'string',
 				),
 			),
+			array(
+				'methods'             => WP_REST_Server::READABLE,
+				'callback'            => array( $this, 'get_item' ),
+				'permission_callback' => array( $this, 'get_items_permissions_check' ),
+			),
 			array(
 				'methods'             => WP_REST_Server::DELETABLE,
 				'callback'            => array( $this, 'delete_item' ),
@@ -157,6 +162,32 @@ class WC_REST_Tax_Classes_V1_Controller extends WC_REST_Controller {
 		return rest_ensure_response( $data );
 	}
 
+	/**
+	 * Get one tax class.
+	 *
+	 * @param WP_REST_Request $request
+	 * @return array
+	 */
+	public function get_item( $request ) {
+		if ( 'standard' === $request['slug'] ) {
+			$tax_class = array(
+				'slug' => 'standard',
+				'name' => __( 'Standard rate', 'woocommerce' ),
+			);
+		} else {
+			$tax_class = WC_Tax::get_tax_class_by( 'slug', sanitize_title( $request['slug'] ) );
+		}
+
+		$data = array();
+		if ( $tax_class ) {
+			$class  = $this->prepare_item_for_response( $tax_class, $request );
+			$class  = $this->prepare_response_for_collection( $class );
+			$data[] = $class;
+		}
+
+		return rest_ensure_response( $data );
+	}
+
 	/**
 	 * Create a single tax class.
 	 *