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<?php
namespace Iubenda\CookieSolution\Helper;
/**
* Class AutoBlocking
*
* Helper class for AutoBlocking functionalities.
*/
class AutoBlocking {
/**
* Include HTTP client functionalities from HttpClientTrait.
* Provides methods for making HTTP requests.
*/
use HttpClientTrait;
/**
* @var string Format for an autoblocking script.
*/
private $autoblockingScriptFormat = '<script type="text/javascript" src="https://cs.iubenda.com/autoblocking/%d.js" charset="UTF-8"></script>';
/**
* @var string Format for sync script.
*/
private $syncScriptFormat = '<script type="text/javascript" src="//cs.iubenda.com/sync/%d.js" charset="UTF-8"></script>';
/**
* @var string Format for autoblocking URL.
*/
private $autoblockingUrlFormat = 'https://cs.iubenda.com/autoblocking/%d.js';
/**
* @var string Pattern to identify autoblocking scripts.
*/
private $autoblockingPattern = "/<script\b[^>]*src=['\"][^'\"]*iubenda\.com\/autoblocking[^'\"]*['\"][^>]*><\/script>/";
/**
* @var string Pattern to identify sync scripts.
*/
private $syncPattern = "/<script\b[^>]*src=['\"][^'\"]*iubenda\.com\/sync[^'\"]*['\"][^>]*><\/script>/";
/**
* @var string Default configuration script.
* Initializes the _iub global variable and ensures that the
* csConfiguration object is defined.
*/
private $defaultCsConfigurationScript = '<script>
window._iub = window._iub || [];
_iub.csConfiguration = _iub.csConfiguration || {};
</script>';
/**
* Process the given code.
*
* @param string $code The code to process.
*
* @return string The processed code.
*/
public function processCode( $code ) {
/**
* Attempt to retrieve the site ID from the provided code.
* If unsuccessful, do nothing and continue to the next iteration.
*/
$siteId = $this->getSiteIdFromCsCode( $code );
if ( empty( $siteId ) || ! (int) $siteId ) {
return $code;
}
/**
* Check if the autoblocking feature is available for the site.
* Remove existing autoblocking and sync scripts if present.
*/
$autoblockingStatus = $this->isAutoblockingFeatureAvailable( $siteId );
$code = $this->removeExistingScripts( $code );
/**
* If the autoblocking feature is available,
* insert the autoblocking script.
* Otherwise, insert the sync script.
*/
if ( $autoblockingStatus ) {
$code = $this->insertAutoblockingScript( $code, $siteId );
} else {
$code = $this->insertSyncScript( $code, $siteId );
}
return $code;
}
/**
* Parses the provided script and extracts the site ID.
*
* @param string $code The script to parse.
*
* @return string The extracted site ID.
*/
public function getSiteIdFromCsCode( $code ) {
if ( empty( $code ) ) {
return '';
}
// Removing slashes from the code.
$code = stripslashes( $code );
// Parsing configuration using regular expressions.
$parsedConfiguration = $this->parseConfigurationByRegex( $code );
// Returning the site ID if found in the parsed configuration.
if ( isset( $parsedConfiguration['siteId'] ) ) {
return $parsedConfiguration['siteId'];
}
// Return empty string if no site ID found.
return '';
}
/**
* Checks whether the autoblocking feature is available for the given site ID.
*
* @param string $siteId The site ID to check.
*
* @return bool True if the autoblocking feature is available; otherwise, false.
*/
public function isAutoblockingFeatureAvailable( $siteId ) {
$url = sprintf( $this->autoblockingUrlFormat, $siteId );
try {
$response = $this->httpGet( $url );
} catch ( \Exception $e ) {
return false;
}
return strlen( $response ) > 150 && strpos( $response, "Autoblocking not enabled" ) === false;
}
/**
* Extracts configuration data from an iubenda code using regex.
*
* @param string $code The iubenda code.
*
* @return array Extracted configuration data.
*/
public function parseConfigurationByRegex( $code ) {
$result = [];
$code = stripslashes( $code );
// Extract 'siteId'.
if ( preg_match( '/siteId([\s\S]*?)(?:,|})/', $code, $matches ) ) {
$result['siteId'] = trim( preg_replace( "/(?:'|\"|}|:)/", ' ', $matches[1] ) );
}
// Extract 'cookiePolicyId'.
if ( preg_match( '/cookiePolicyId([\s\S]*?)(?:,|})/', $code, $matches ) ) {
$result['cookiePolicyId'] = trim( preg_replace( "/(?:'|\"|}|:)/", ' ', $matches[1] ) );
}
return $result;
}
/**
* Removes existing autoblocking and sync scripts from the given code if found.
*
* This function searches for script tags within the given HTML code where the src attribute
* includes either "iubenda.com/autoblocking" or "iubenda.com/sync", and removes them if found.
*
* @param string $code The HTML code to clean.
*
* @return string The cleaned HTML code, without autoblocking and sync scripts if found.
*/
public function removeExistingScripts( $code ) {
// Remove the autoblocking scripts if found.
$code = preg_replace( $this->autoblockingPattern, '', $code );
// Remove the sync scripts if found.
$code = preg_replace( $this->syncPattern, '', $code );
// Trim and return the cleaned code.
return trim( $code );
}
/**
* Inserts the autoblocking script after the _iub.csConfiguration script block.
*
* This function inserts autoblocking script URL after the _iub.csConfiguration in provided code,
* ensuring that the script is loaded after the _iub.csConfiguration code content.
*
* @param string $code The existing code content to which the script will be inserted.
* @param string $site_id The site ID used to generate the autoblocking script URL.
*
* @return string The modified code with the autoblocking script inserted.
*/
public function insertAutoblockingScript( $code, $site_id ) {
$autoblockingScriptUrl = sprintf(
$this->autoblockingScriptFormat,
$site_id
);
return $this->insertScriptAfterCsConfiguration( $code, $autoblockingScriptUrl );
}
/**
* Inserts the sync script after the _iub.csConfiguration script block.
*
* This function inserts sync script URL after the _iub.csConfiguration in provided code,
* ensuring that the script is loaded after the _iub.csConfiguration code content.
*
* @param string $code The existing code content to which the script will be inserted.
* @param string $site_id The site ID used to generate the sync script URL.
*
* @return string The modified code with the sync script inserted.
*/
public function insertSyncScript( $code, $site_id ) {
$syncScriptUrl = sprintf(
$this->syncScriptFormat,
$site_id
);
return $this->insertScriptAfterCsConfiguration( $code, $syncScriptUrl );
}
/**
* Inserts a script immediately after the _iub.csConfiguration script block.
*
* This method inserts a script immediately after the _iub.csConfiguration script block within the provided code.
* It searches for the _iub.csConfiguration script block and determines its position in the code.
* Then, it finds the position of closing </script> tag following the _iub.csConfiguration block and inserts the script after it.
* If _iub.csConfiguration or </script> is not found, it adds the necessary script tags and then inserts the custom script.
*
* @param string $code The original code containing the _iub.csConfiguration script.
* @param string $script The script to insert.
*
* @return string The modified code with the script inserted.
*/
private function insertScriptAfterCsConfiguration( $code, $script ) {
// Detect the position of _iub.csConfiguration.
$CsConfigurationPos = strpos( $code, '_iub.csConfiguration' );
if ( $CsConfigurationPos !== false ) {
// Detect the position of </script> after _iub.csConfiguration.
$CsConfigurationScriptEndPos = strpos( $code, '</script>', $CsConfigurationPos );
if ( $CsConfigurationScriptEndPos !== false ) {
// Insert the custom script after the </script> tag.
$CsConfigurationScriptEndPos += 9; // Length of '</script>'
// Extract the substring before and after the </script> tag.
$beforeCsConfigurationScript = substr( $code, 0, $CsConfigurationScriptEndPos );
$afterCsConfigurationScript = substr( $code, $CsConfigurationScriptEndPos );
// Trim both substrings and then add the custom script.
$beforeCsConfigurationScript = trim( $beforeCsConfigurationScript );
$afterCsConfigurationScript = trim( $afterCsConfigurationScript );
return $beforeCsConfigurationScript . PHP_EOL . $script . PHP_EOL . $afterCsConfigurationScript;
}
}
// If _iub.csConfiguration or </script> is not found, prepend the necessary script tags and the custom script.
return $this->defaultCsConfigurationScript . PHP_EOL . $script . PHP_EOL . $code;
}
}