mention.php

См. документацию.

<?php

namespace Bitrix\Socialnetwork\Helper;
 
class Mention
{
    protected const PATTERN_USER = '/\[user\s*=\s*([^\]]*)\](.+?)\[\/user\]/isu';
    protected const PATTERN_PROJECT = '/\[project\s*=\s*([^\]]*)\](.+?)\[\/project\]/isu';
    protected const PATTERN_DEPARTMENT = '/\[department\s*=\s*([^\]]*)\](.+?)\[\/department\]/isu';
 
    protected static function getPatternsList(): array
    {
        return [
            self::PATTERN_USER,
            self::PATTERN_PROJECT,
            self::PATTERN_DEPARTMENT,
        ];
    }

    public static function getUserIds(string $text = ''): array
    {
        $usersData = self::getUsers($text);
        return array_map(function($item) { return $item['ID']; }, $usersData);
    }

    public static function getUsers(string $text = ''): array
    {
        return self::getEntitiesList($text, self::PATTERN_USER);
    }
 
    public static function getProjectIds(string $text = ''): array
    {
        $projectsData = self::getProjects($text);
        return array_map(function($item) { return $item['ID']; }, $projectsData);
    }
 
    public static function getProjects(string $text = ''): array
    {
        return self::getEntitiesList($text, self::PATTERN_PROJECT);
    }
 
    public static function getDepartmentIds(string $text = ''): array
    {
        $departmentsData = self::getDepartments($text);
        return array_map(function($item) { return $item['ID']; }, $departmentsData);
    }
 
    public static function getDepartments(string $text = ''): array
    {
        return self::getEntitiesList($text, self::PATTERN_DEPARTMENT);
    }
 
    protected static function getEntitiesList(string $text = '', string $pattern = ''): array
    {
        $result = [];
        preg_match_all($pattern, $text, $matches);
 
        if (empty($matches))
        {
            return $result;
        }
 
        foreach($matches[1] as $key => $userId)
        {
            $result[] = [
                'ID' => (int)$userId,
                'NAME' => $matches[2][$key],
            ];
        }
 
        return $result;
    }

    public static function clear(string $text = ''): string
    {
        $result = $text;
 
        foreach (self::getPatternsList() as $pattern)
        {
            $result = preg_replace(
                $pattern,
                '\\2',
                $result
            );
        }
 
        return $result;
    }
}