Remove WP Block parser error (#187)

Removes the `WP_Block_Parser_Error` that is not a part of WordPress core
and was invented in php-toolkit. Referencing it resulted in a crash in
WordPress/wordpress-importer#207.

Author: adamziel

components/BlockParser/class-wp-block-parser-error.php

@@ -2,7 +2,7 @@
 
 namespace WordPress\DataLiberation\BlockMarkup;
 
-use WP_Block_Parser_Error;
+use WP_Error;
 use WP_HTML_Tag_Processor;
 
 /**
@@ -113,9 +113,9 @@ public function get_token_type(): ?string {
 	/**
 	 * Gets the most recent error encountered while parsing blocks
 	 *
-	 * @return WP_Block_Parser_Error|null The error message or null if no error
+	 * @return WP_Error|null The error message or null if no error
 	 */
-	public function get_last_error(): ?WP_Block_Parser_Error {
+	public function get_last_error(): ?WP_Error {
 		return $this->last_block_error;
 	}
 
@@ -362,9 +362,9 @@ public function next_token(): bool {
 		$name_length = strspn( $text, 'abcdefghijklmnopqrstuwxvyzABCDEFGHIJKLMNOPRQSTUWXVYZ0123456789_-', $at );
 		if ( 0 === $name_length ) {
 			// This wasn't a block after all, just a regular comment.
-			$this->last_block_error = new WP_Block_Parser_Error(
-				sprintf( 'An HTML comment started with "wp:" that was not followed by a valid block name: %s', $text ),
-				WP_Block_Parser_Error::TYPE_SUSPICIOUS_DELIMITER
+			$this->last_block_error = new WP_Error(
+				'suspicious-delimiter',
+				sprintf( 'An HTML comment started with "wp:" that was not followed by a valid block name: %s', $text )
 			);
 
 			return true;
@@ -404,9 +404,9 @@ public function next_token(): bool {
 				if ( null === $attributes || ! is_array( $attributes ) ) {
 					// This comment looked like a block comment, but the attributes didn't
 					// parse as a JSON array. This means it wasn't a block after all.
-					$this->last_block_error = new WP_Block_Parser_Error(
-						sprintf( '%s could be parsed as a delimiter but JSON attributes were malformed: %s.', $name, $json_maybe ),
-						WP_Block_Parser_Error::TYPE_SUSPICIOUS_DELIMITER
+					$this->last_block_error = new WP_Error(
+						'suspicious-delimiter',
+						sprintf( '%s could be parsed as a delimiter but JSON attributes were malformed: %s.', $name, $json_maybe )
 					);
 
 					return true;
@@ -423,9 +423,9 @@ public function next_token(): bool {
 		if ( $this->block_closer ) {
 			$popped = array_pop( $this->stack_of_open_blocks );
 			if ( $popped !== $name ) {
-				$this->last_block_error = new WP_Block_Parser_Error(
-					sprintf( 'Block closer %s does not match the last opened block %s.', $name, $popped ),
-					WP_Block_Parser_Error::TYPE_MISMATCHED_CLOSER
+				$this->last_block_error = new WP_Error(
+					'mismatched-closer',
+					sprintf( 'Block closer %s does not match the last opened block %s.', $name, $popped )
 				);
 
 				return false;

components/DataLiberation/BlockMarkup/class-blockmarkupprocessor.php

@@ -12,6 +12,23 @@
 	require_once __DIR__ . '/../HTML/html5-named-character-references.php';
 }
 
+if ( ! class_exists( 'WP_Error' ) ) {
+	class WP_Error {
+		public $code;
+		public $message;
+		public $data;
+
+		public function __construct( $code = '', $message = '', $data = '' ) {
+			if ( empty( $code ) ) {
+				return;
+			}
+			$this->code = $code;
+			$this->message = $message;
+			$this->data = $data;
+		}
+	}
+}
+
 if ( ! class_exists( 'WP_Block_Parser' ) ) {
 	require_once __DIR__ . '/../BlockParser/class-wp-block-parser-block.php';
 	require_once __DIR__ . '/../BlockParser/class-wp-block-parser-frame.php';