CAllUser::CheckInternalFields

static function CheckInternalFields($arFields, $ID = false)
{
	global $DB;

	$resultError = '';

	$emailRequired = (Option::get('main', 'new_user_email_required', 'Y') != 'N');
	$phoneRequired = (Option::get('main', 'new_user_phone_required', 'N') == 'Y');

	if ($ID === false)
	{
		if (!isset($arFields["LOGIN"]))
		{
			$resultError .= GetMessage("user_login_not_set") . "
";
		}

		if (!isset($arFields["PASSWORD"]))
		{
			$resultError .= GetMessage("user_pass_not_set") . "
";
		}

		if ($emailRequired && !isset($arFields["EMAIL"]))
		{
			$resultError .= GetMessage("user_email_not_set") . "
";
		}

		if ($phoneRequired && !isset($arFields["PHONE_NUMBER"]))
		{
			$resultError .= GetMessage("main_user_check_no_phone") . "
";
		}
	}
	if (is_set($arFields, "LOGIN") && $arFields["LOGIN"] != trim($arFields["LOGIN"]))
	{
		$resultError .= GetMessage("LOGIN_WHITESPACE") . "
";
	}

	if (is_set($arFields, "LOGIN") && mb_strlen($arFields["LOGIN"]) < 3)
	{
		$resultError .= GetMessage("MIN_LOGIN") . "
";
	}

	if (is_set($arFields, "PASSWORD"))
	{
		if (is_set($arFields, "CONFIRM_PASSWORD") && $arFields["PASSWORD"] !== $arFields["CONFIRM_PASSWORD"])
		{
			//we shouldn't show that password is correct
			$resultError .= GetMessage("WRONG_CONFIRMATION") . "
";
		}
		else
		{
			if (array_key_exists("GROUP_ID", $arFields))
			{
				$arGroups = [];
				if (is_array($arFields["GROUP_ID"]))
				{
					foreach ($arFields["GROUP_ID"] as $arGroup)
					{
						if (is_array($arGroup))
						{
							$arGroups[] = $arGroup["GROUP_ID"];
						}
						else
						{
							$arGroups[] = $arGroup;
						}
					}
				}
				$policy = static::getPolicy($arGroups);
			}
			elseif ($ID !== false)
			{
				$policy = static::getPolicy($ID);
			}
			else
			{
				$policy = static::getPolicy([]);
			}

			$passwordErrors = static::CheckPasswordAgainstPolicy($arFields["PASSWORD"], $policy->getValues(), ($ID !== false ? $ID : null));
			if (!empty($passwordErrors))
			{
				$resultError .= implode("
", $passwordErrors) . "
";
			}
		}
	}

	if (is_set($arFields, "EMAIL"))
	{
		if (($emailRequired && mb_strlen($arFields["EMAIL"]) < 3) || ($arFields["EMAIL"] != '' && !check_email($arFields["EMAIL"], true)))
		{
			$resultError .= GetMessage("WRONG_EMAIL") . "
";
		}
		elseif (Option::get('main', 'new_user_email_uniq_check', 'N') === 'Y')
		{
			if ($arFields["EMAIL"] != '')
			{
				$oldEmail = '';
				if ($ID > 0)
				{
					// the option 'new_user_email_uniq_check' might have been switched on after the DB already contained identical emails,
					// so we let a user to have the old email, but not the existing new one
					$dbr = $DB->Query("SELECT EMAIL FROM b_user WHERE ID=" . intval($ID));
					if (($ar = $dbr->Fetch()))
					{
						$oldEmail = $ar['EMAIL'];
					}
				}
				if (!$ID || $arFields["EMAIL"] != $oldEmail)
				{
					$res = static::GetList('', '',
						[
							"=EMAIL" => $arFields["EMAIL"],
							"EXTERNAL_AUTH_ID" => $arFields["EXTERNAL_AUTH_ID"] ?? null,
						],
						[
							"FIELDS" => ["ID"],
						]
					);
					while ($ar = $res->Fetch())
					{
						if (intval($ar["ID"]) !== intval($ID))
						{
							$resultError .= GetMessage("USER_WITH_EMAIL_EXIST", ["#EMAIL#" => htmlspecialcharsbx($arFields["EMAIL"])]) . "
";
						}
					}
				}
			}
		}
	}

	if (isset($arFields["PHONE_NUMBER"]))
	{
		if ($phoneRequired && $arFields["PHONE_NUMBER"] == '')
		{
			$resultError .= GetMessage("main_user_check_no_phone") . "
";
		}
		elseif ($arFields["PHONE_NUMBER"] != '')
		{
			//normalize the number: we need it normalized for validation
			$phoneNumber = MainUserPhoneAuthTable::normalizePhoneNumber($arFields["PHONE_NUMBER"]);

			//validation
			$field = MainUserPhoneAuthTable::getEntity()->getField("PHONE_NUMBER");
			$result = new MainORMDataResult();
			$primary = ($ID === false ? [] : ["USER_ID" => $ID]);
			$field->validateValue($phoneNumber, $primary, [], $result);
			if (!$result->isSuccess())
			{
				$resultError .= implode("
", $result->getErrorMessages());
			}
		}
	}

	if (isset($arFields["GROUP_ID"]) && is_array($arFields["GROUP_ID"]) && !empty($arFields["GROUP_ID"]))
	{
		if (isset($arFields["GROUP_ID"][0]) && is_array($arFields["GROUP_ID"][0]) && !empty($arFields["GROUP_ID"][0]))
		{
			foreach ($arFields["GROUP_ID"] as $arGroup)
			{
				if ($arGroup["DATE_ACTIVE_FROM"] != '' && !CheckDateTime($arGroup["DATE_ACTIVE_FROM"]))
				{
					$error = str_replace("#GROUP_ID#", $arGroup["GROUP_ID"], GetMessage("WRONG_DATE_ACTIVE_FROM"));
					$resultError .= $error . "
";
				}

				if ($arGroup["DATE_ACTIVE_TO"] != '' && !CheckDateTime($arGroup["DATE_ACTIVE_TO"]))
				{
					$error = str_replace("#GROUP_ID#", $arGroup["GROUP_ID"], GetMessage("WRONG_DATE_ACTIVE_TO"));
					$resultError .= $error . "
";
				}
			}
		}
	}

	return $resultError;
}