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Merge pull request #88 from kidunot89/feature/ql-session-handler
QL Session Handler
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| <?php | ||
| /** | ||
| * Handles data for the current customers session. | ||
| * | ||
| * @package WPGraphQL\Extensions\WooCommerce\Utils | ||
| * @since 0.1.2 | ||
| */ | ||
|
|
||
| namespace WPGraphQL\Extensions\WooCommerce\Utils; | ||
|
|
||
| /** | ||
| * Class - QL_Session_Handler | ||
| */ | ||
| class QL_Session_Handler extends \WC_Session_Handler { | ||
| /** | ||
| * Encrypt and decrypt | ||
| * | ||
| * @author Nazmul Ahsan <n.mukto@gmail.com> | ||
| * @author Geoff Taylor <kidunot89@gmail.com> | ||
| * @link http://nazmulahsan.me/simple-two-way-function-encrypt-decrypt-string/ | ||
| * | ||
| * @param string $string string to be encrypted/decrypted. | ||
| * @param string $action what to do with this? e for encrypt, d for decrypt. | ||
| * | ||
| * @return string | ||
| */ | ||
| private function crypt( $string, $action = 'e' ) { | ||
| // you may change these values to your own. | ||
| $secret_key = apply_filters( 'woographql_session_header_secret_key', 'my_simple_secret_key' ); | ||
| $secret_iv = apply_filters( 'woographql_session_header_secret_iv', 'my_simple_secret_iv' ); | ||
|
|
||
| $output = false; | ||
| $encrypt_method = 'AES-256-CBC'; | ||
| $key = hash( 'sha256', $secret_key ); | ||
| $iv = substr( hash( 'sha256', $secret_iv ), 0, 16 ); | ||
|
|
||
| if ( 'e' === $action ) { | ||
| $output = base64_encode( openssl_encrypt( $string, $encrypt_method, $key, 0, $iv ) ); | ||
| } elseif ( 'd' === $action ) { | ||
| $output = openssl_decrypt( base64_decode( $string ), $encrypt_method, $key, 0, $iv ); | ||
| } | ||
|
|
||
| return $output; | ||
| } | ||
|
|
||
| /** | ||
| * Returns formatted $_SERVER index from provided string. | ||
| * | ||
| * @param string $string String to be formatted. | ||
| * | ||
| * @return string | ||
| */ | ||
| private function get_server_key( $string ) { | ||
| return 'HTTP_' . strtoupper( preg_replace( '#[^A-z0-9]#', '_', $string ) ); | ||
| } | ||
|
|
||
| /** | ||
| * Encrypts and sets the session header on-demand (usually after adding an item to the cart). | ||
| * | ||
| * Warning: Headers will only be set if this is called before the headers are sent. | ||
| * | ||
| * @param bool $set Should the session cookie be set. | ||
| */ | ||
| public function set_customer_session_cookie( $set ) { | ||
| if ( $set ) { | ||
| $to_hash = $this->_customer_id . '|' . $this->_session_expiration; | ||
| $cookie_hash = hash_hmac( 'md5', $to_hash, wp_hash( $to_hash ) ); | ||
| $cookie_value = $this->_customer_id . '||' . $this->_session_expiration . '||' . $this->_session_expiring . '||' . $cookie_hash; | ||
| $this->_has_cookie = true; | ||
| if ( ! isset( $_SERVER[ $this->_cookie ] ) || $_SERVER[ $this->_cookie ] !== $cookie_value ) { | ||
| add_filter( | ||
| 'graphql_response_headers_to_send', | ||
| function( $headers ) use ( $cookie_value ) { | ||
| $headers[ $this->_cookie ] = $this->crypt( $cookie_value, 'e' ); | ||
| return $headers; | ||
| } | ||
| ); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Return true if the current user has an active session, i.e. a cookie to retrieve values. | ||
| * | ||
| * @return bool | ||
| */ | ||
| public function has_session() { | ||
| // @codingStandardsIgnoreLine. | ||
| return isset( $_SERVER[ $this->get_server_key( $this->_cookie ) ] ) || $this->_has_cookie || is_user_logged_in(); | ||
| } | ||
|
|
||
| /** | ||
| * Retrieve and decrypt the session data from session, if set. Otherwise return false. | ||
| * | ||
| * Session cookies without a customer ID are invalid. | ||
| * | ||
| * @return bool|array | ||
| */ | ||
| public function get_session_cookie() { | ||
| // @codingStandardsIgnoreStart. | ||
| $cookie_value = isset( $_SERVER[ $this->get_server_key( $this->_cookie ) ] ) | ||
| ? $this->crypt( $_SERVER[ $this->get_server_key( $this->_cookie ) ], 'd' ) | ||
| : false; | ||
| // @codingStandardsIgnoreEnd. | ||
| if ( empty( $cookie_value ) || ! is_string( $cookie_value ) ) { | ||
| return false; | ||
| } | ||
| list( $customer_id, $session_expiration, $session_expiring, $cookie_hash ) = explode( '||', $cookie_value ); | ||
| if ( empty( $customer_id ) ) { | ||
| return false; | ||
| } | ||
| // Validate hash. | ||
| $to_hash = $customer_id . '|' . $session_expiration; | ||
| $hash = hash_hmac( 'md5', $to_hash, wp_hash( $to_hash ) ); | ||
| if ( empty( $cookie_hash ) || ! hash_equals( $hash, $cookie_hash ) ) { | ||
| return false; | ||
| } | ||
| return array( $customer_id, $session_expiration, $session_expiring, $cookie_hash ); | ||
| } | ||
|
|
||
| /** | ||
| * Forget all session data without destroying it. | ||
| */ | ||
| public function forget_session() { | ||
| add_filter( | ||
| 'graphql_response_headers_to_send', | ||
| function( $headers ) { | ||
| $headers[ $this->_cookie ] = 'false'; | ||
| return $headers; | ||
| } | ||
| ); | ||
| wc_empty_cart(); | ||
| $this->_data = array(); | ||
| $this->_dirty = false; | ||
| $this->_customer_id = $this->generate_customer_id(); | ||
| } | ||
| } |
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