CSocNetLogFollow::Set

static function Set($user_id, $code = "**", $type = "Y", $follow_date = false, $site_id = SITE_ID, $bByWF = false)
{
	global $USER;

	static $LOG_CACHE;
	static $runCache = []; // to prevent double run

	if ($code == '')
	{
		$code = "**";
	}

	if ($type != "Y")
	{
		$type = "N";
	}

	$user_id = intval($user_id);
	if ($user_id <= 0)
	{
		$user_id = $USER->GetID();
	}

	$runCacheKey = [
		'userId' => $user_id,
		'code' => $code,
		'type' => $type,
		'date' => $follow_date,
		'siteId' => $site_id,
		'byWF' => $bByWF
	];

	$runCacheKey = md5(serialize($runCacheKey));
	if (array_key_exists($runCacheKey, $runCache))
	{
		return true;
	}
	$runCache[$runCacheKey] = true;

	$arFollows = array();

	$rsFollow = CSocNetLogFollow::GetList(
		array(
			"USER_ID" => $user_id, 
			"CODE" => array_unique(array("**", $code))
		)
	);
	while($arFollow = $rsFollow->Fetch())
	{
		$arFollows[$arFollow["CODE"]] = array(
			"TYPE" => $arFollow["TYPE"],
			"FOLLOW_DATE" => $arFollow["FOLLOW_DATE"]
		);
	}

	$default_type = (
		array_key_exists("**", $arFollows)
			? $arFollows["**"]["TYPE"]
			: COption::GetOptionString("socialnetwork", "follow_default_type", "Y")
	);

	$res = false;

	if (preg_match('/^L(d+)$/', $code, $matches))
	{
		$log_id = intval($matches[1]);
		if ($log_id > 0)
		{
			if (isset($LOG_CACHE[$log_id]))
			{
				$arLog = $LOG_CACHE[$log_id];
			}
			else
			{
				$rsLog = CSocNetLog::GetList(
					array("ID" => "DESC"),
					array("ID" => $log_id),
					false,
					false,
					array("ID", "LOG_UPDATE", "LOG_DATE"),
					array(
						"CHECK_RIGHTS" => "N",
						"USE_SUBSCRIBE" => "N",
						"USE_FOLLOW" => "N"
					)
				);

				if ($arLog = $rsLog->Fetch())
				{
					$LOG_CACHE[$log_id] = $arLog;
				}
			}

			if ($arLog)
			{
				$log_date = ($arLog["LOG_DATE"] <> '' ? $arLog["LOG_DATE"] : false);
				$log_update = ($arLog["LOG_UPDATE"] <> '' ? $arLog["LOG_UPDATE"] : false);

				if (array_key_exists($code, $arFollows)) // already in the follows table
				{
					$res = CSocNetLogFollow::Update(
						$user_id, 
						$code, 
						$type, 
						(
							$arFollows[$code]["FOLLOW_DATE"] <> ''
								? $arFollows[$code]["FOLLOW_DATE"] // existing value
								: (
									$type == "N" 
										? $log_update 
										: ($code == "**" ? $log_date : false)
								)
						),
						$bByWF
					);
				}
				elseif ($type != $default_type) // new record in the follow table only if not equal to default type
				{
					$res = CSocNetLogFollow::Add(
						$user_id, 
						$code, 
						$type, 
						(
							$follow_date
								? $follow_date
								: (
									$type == "N" 
										? $log_update 
										: $log_date
								)
						),
						$bByWF
					);
				}

				if ($res)
				{
					$events = getModuleEvents('socialnetwork', 'onAfterLogFollowSet');
					while ($eventFields = $events->fetch())
					{
						executeModuleEventEx($eventFields, [ $log_id, $type, $user_id ]);
					}
				}
			}
		}
	}
	else // **, change of default type
	{
		$res = (
			array_key_exists($code, $arFollows)
				? CSocNetLogFollow::Update($user_id, $code, $type, false)
				: CSocNetLogFollow::Add($user_id, $code, $type, false)
		);
	}

	return $res;
}