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<?php
class PostmanLogFields {
private $fields = array(
'success' => 'sanitize_text_field',
'solution' => [ 'PostmanLogFields', 'sanitize_message' ],
'from_header' => [ 'PostmanLogFields', 'email_header_sanitize' ],
'to_header' => [ 'PostmanLogFields', 'email_header_sanitize' ],
'cc_header' => [ 'PostmanLogFields', 'email_header_sanitize' ],
'bcc_header' => [ 'PostmanLogFields', 'email_header_sanitize' ],
'reply_to_header' => [ 'PostmanLogFields', 'email_header_sanitize' ],
'transport_uri' => 'sanitize_text_field',
'original_to' => 'sanitize_text_field',
'original_subject' => 'sanitize_text_field',
'original_message' => '', // only sent to viewed
'original_headers' => '', // only sent to viewed
'session_transcript' => '', // escaped when viewed
);
private static $instance = null;
public static function get_instance() {
if ( ! self::$instance ) {
self::$instance = new static();
}
return self::$instance;
}
private function __construct()
{
}
public function get( $post_id ) {
$data = [];
foreach ( $this->fields as $key => $sanitize_callback ) {
$meta = get_post_meta( $post_id, $key, true );
$data[$key][] = $this->maybe_json( $meta );
}
return $data;
}
public function get_fields() {
return $this->fields;
}
public function update( $post_id, $key, $value ) {
$sanitized = $this->sanitize( $key, $value );
$encode = $this->encode( $sanitized );
update_post_meta( $post_id, $key, $encode );
}
private function maybe_json( $json ) {
if ( is_array( $json ) ) {
return implode( ',', $json );
}
if ( $this->isJson( $json ) ) {
return implode( ',', json_decode( $json, true ) );
}
// Fallback
return maybe_unserialize( $json );
}
private function isJson($string) {
$result = json_decode($string, true);
$error = json_last_error();
return ( $error == JSON_ERROR_NONE && ! is_null($result) && $result != $string );
}
private function sanitize( $key, $value ) {
$callback = is_array( $value ) ? 'array_map' : 'call_user_func';
if ( ! empty( $this->fields[$key] ) ) {
return $callback( $this->fields[$key], $value );
}
return $value;
}
private function sanitize_message( $message ) {
$allowed_tags = wp_kses_allowed_html( 'post' );
$allowed_tags['style'] = array();
return wp_kses( $message, $allowed_tags );
}
private function sanitize_html( $value ) {
$allowed_html = array(
'a' => array(
'href' => array(),
),
'br' => array(),
);
return wp_kses( $value, $allowed_html );
}
private function encode( $value ) {
if ( is_array( $value ) ) {
return wp_json_encode( $value );
}
return $value;
}
public function get_string_between($string, $start, $end){
$string = ' ' . $string;
$ini = strpos($string, $start);
if ($ini == 0) {
return '';
}
$ini += strlen($start);
$len = strpos($string, $end, $ini) - $ini;
return substr($string, $ini, $len);
}
public function email_header_sanitize($value) {
$parts = explode( ',', $value );
$sanitized = [];
foreach ( $parts as $part ) {
if ( strpos( $part, '<' ) !== false ) {
$email = $this->get_string_between( $part, '<', '>' );
$clean_email = $this->sanitize_email($email);
preg_match('/(.*)</', $part, $output_array);
$name = filter_var( trim( $output_array[1] ), FILTER_SANITIZE_STRING );
$sanitized[] = "{$name} <{$clean_email}>";
}
}
return ! empty( $sanitized ) ? implode( ',', $sanitized ) : implode( ',', array_map( [ $this, 'sanitize_email'], $parts ) );
}
public function sanitize_email( $email ) {
return filter_var( $email, FILTER_SANITIZE_EMAIL );
}
}
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