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<?php
namespace Automattic\WooCommerce\Blueprint;
/**
* Class ClassExtractor
*
* Provides functionality to manipulate PHP class files by replacing variables,
* adding prefixes, and removing strict types declarations.
*
* This class is used to generate 'code' part for runPHP step from a template file.
*/
class ClassExtractor {
/**
* Path to the PHP file being processed.
*
* @var string
*/
private string $file_path;
/**
* Whether the file contains a strict types declaration.
*
* @var bool
*/
private bool $has_strict_types_declaration = false;
/**
* PHP code to prefix to the final output.
*
* @var string
*/
private string $prefix = '';
/**
* Replacements for class variables.
*
* @var array
*/
private array $class_variable_replacements = array();
/**
* Replacements for method variables.
*
* @var array
*/
private array $method_variable_replacements = array();
/**
* Constructor.
*
* @param string $file_path Path to the PHP file to process.
*
* @throws \InvalidArgumentException If the file does not exist.
*/
public function __construct( string $file_path ) {
if ( ! file_exists( $file_path ) ) {
throw new \InvalidArgumentException( "File not found: $file_path" );
}
$this->file_path = $file_path;
}
/**
* Adds a prefix to include the WordPress wp-load.php file.
*
* @return $this
*/
public function with_wp_load() {
$this->prefix .= "<?php require_once 'wordpress/wp-load.php'; ";
return $this;
}
/**
* Replaces a class variable with a new value.
*
* @param string $variable_name Name of the class variable.
* @param mixed $new_value The new value to assign to the variable.
*
* @return $this
*/
public function replace_class_variable( $variable_name, $new_value ) {
$this->class_variable_replacements[ $variable_name ] = $new_value;
return $this;
}
/**
* Replaces a variable inside a method with a new value.
*
* @param string $method_name Name of the method.
* @param string $variable_name Name of the variable to replace.
* @param mixed $new_value The new value to assign to the variable.
*
* @return $this
*/
public function replace_method_variable( $method_name, $variable_name, $new_value ) {
$this->method_variable_replacements[] = array(
'method' => $method_name,
'variable' => $variable_name,
'value' => $new_value,
);
return $this;
}
/**
* Generates the processed PHP code with applied replacements and prefixes.
*
* @return string The modified PHP code.
*/
public function get_code() {
// Security check: Check if we can replace this with a more secure function.
$file_content = file_get_contents( $this->file_path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
$file_content = preg_replace( '/<\?php\s*/', '', $file_content );
if ( preg_match( '/declare\s*\(\s*strict_types\s*=\s*1\s*\)\s*;/', $file_content ) ) {
$this->has_strict_types_declaration = true;
$file_content = preg_replace( '/declare\s*\(\s*strict_types\s*=\s*1\s*\)\s*;/', '', $file_content );
}
$file_content = preg_replace( '/\/\*.*?\*\/|\/\/.*?(?=\r?\n)/s', '', $file_content );
foreach ( $this->class_variable_replacements as $variable => $value ) {
$file_content = $this->apply_class_variable_replacement( $file_content, $variable, $value );
}
foreach ( $this->method_variable_replacements as $replacement ) {
$file_content = $this->apply_variable_replacement(
$file_content,
$replacement['method'],
$replacement['variable'],
$replacement['value']
);
}
return $this->prefix . trim( $file_content );
}
/**
* Applies a replacement to a class variable in the file content.
*
* @param string $file_content The content of the PHP file.
* @param string $variable_name The name of the variable to replace.
* @param mixed $new_value The new value for the variable.
*
* @return string The updated file content.
*/
private function apply_class_variable_replacement( $file_content, $variable_name, $new_value ) {
// Security check: Check if it's necessary to use var_export.
$replacement_value = var_export( $new_value, true ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export
$pattern = '/(protected|private|public)\s+\$' . preg_quote( $variable_name, '/' ) . '\s*=\s*.*?;|'
. '(protected|private|public)\s+\$' . preg_quote( $variable_name, '/' ) . '\s*;?/';
$replacement = "$1 \$$variable_name = $replacement_value;";
return preg_replace( $pattern, $replacement, $file_content, 1 );
}
/**
* Applies a replacement to a variable in a specific method.
*
* @param string $file_content The content of the PHP file.
* @param string $method_name The name of the method containing the variable.
* @param string $variable_name The name of the variable to replace.
* @param mixed $new_value The new value for the variable.
*
* @return string The updated file content.
*/
private function apply_variable_replacement( $file_content, $method_name, $variable_name, $new_value ) {
$pattern = '/function\s+' . preg_quote( $method_name, '/' ) . '\s*\([^)]*\)\s*\{\s*(.*?)\s*\}/s';
if ( preg_match( $pattern, $file_content, $matches ) ) {
$method_body = $matches[1];
// Security check: Check if it's necessary to use var_export.
$new_value_exported = var_export( $new_value, true ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export
$variable_pattern = '/\$' . preg_quote( $variable_name, '/' ) . '\s*=\s*[^;]+;/';
$replacement = '$' . $variable_name . ' = ' . $new_value_exported . ';';
$updated_method_body = preg_replace( $variable_pattern, $replacement, $method_body, 1 );
if ( null !== $updated_method_body ) {
$file_content = str_replace( $method_body, $updated_method_body, $file_content );
}
}
return $file_content;
}
/**
* Checks if the file has a strict types declaration.
*
* @return bool True if the file has a strict types declaration, false otherwise.
*/
public function has_strict_type_declaration() {
return $this->has_strict_types_declaration;
}
}