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<?php
class Tribe__Support__Obfuscator {
/**
* @var array
*/
protected $prefixes = [];
/**
* Tribe__Support__Obfuscator constructor.
*
* @param array $prefixes
*/
public function __construct( array $prefixes = [] ) {
$this->prefixes = $prefixes;
}
/**
* Whether a value should be obfuscated or not.
*
* @param string $key
*
* @return bool
*/
public function should_obfuscate( $key ) {
foreach ( $this->prefixes as $prefix ) {
if ( strpos( $key, $prefix ) === 0 ) {
return true;
}
}
return false;
}
/**
* Conditionally obfuscates a string value.
*
* @param string $key
* @param mixed $string_value
*
* @return mixed Either the obfuscated string or the original value if not a string.
*/
public function obfuscate( $key, $string_value ) {
if ( ! is_string( $string_value ) ) {
return $string_value;
}
if ( ! $this->should_obfuscate( $key ) ) {
return $string_value;
}
$length = strlen( $string_value );
if ( $length <= 3 ) {
return preg_replace( "/./", "#", $string_value );
} elseif ( $length > 3 && $length <= 5 ) {
return preg_replace( '/^(.{1}).*$/', '$1' . str_repeat( '#', $length - 1 ) . '$2', $string_value );
} elseif ( $length > 5 && $length <= 9 ) {
return preg_replace( '/^(.{1}).*(.{1})$/', '$1' . str_repeat( '#', $length - 2 ) . '$2', $string_value );
} elseif ( $length > 9 && $length <= 19 ) {
return preg_replace( '/^(.{2}).*(.{2})$/', '$1' . str_repeat( '#', $length - 4 ) . '$2', $string_value );
} elseif ( $length > 19 && $length <= 31 ) {
return preg_replace( '/^(.{3}).*(.{3})$/', '$1' . str_repeat( '#', $length - 6 ) . '$2', $string_value );
}
return preg_replace( '/^(.{4}).*(.{4})$/', '$1' . str_repeat( '#', $length - 8 ) . '$2', $string_value );
}
}