BB Code - Need help restricting to specific usergroups

[Peter Walker]

I am trying to resolve the following problem, but my coding skills are obviously not sufficient to get this working. What I am trying to do is have a BB code that displays a video to users in the premium usergroup and shows all others an image and a comment that they have to buy a subscription to view this video.

I have got a working BB code to display the video, my problem is restricting this to members of the specified usergroup.

Here is the code I put together (i shortened the video part as that is not the issue):

if(is_member_of($user,30)==TRUE)
{
// Premium member, can watch video
//

<a href="premium/{param}" style="display:block;width:720px;height:405px;" id="player"></a>

<script language="JavaScript">
flowplayer("player", "flash/flowplayer-3.2.5.swf", 
	{

[ **** VIDEO CODE REMOVED FROM THIS EXAMPLE ****]
});
</script>

}
else
{
//  Not Premium Member

<img src="premium/thumbs/{option}" border="0" alt="" />

Note: Premium membership required to watch this video.
}



// #############################################################################
/**
* Works out if a user is a member of the specified usergroup(s)
*
* This function can be overloaded to test multiple usergroups: is_member_of($user, 1, 3, 4, 6...)
*
* @param	array	User info array - must contain userid, usergroupid and membergroupids fields
* @param	integer	Usergroup ID to test
* @param	boolean	Pull result from cache
*
* @return	boolean
*/
function is_member_of($userinfo, $usergroupid, $cache = true)
{
	static $user_memberships;

	switch (func_num_args())
	{
		// 1 can't happen

		case 2: // note: func_num_args doesn't count args with default values unless they're overridden
			$groups = is_array($usergroupid) ? $usergroupid : array($usergroupid);
		break;

		case 3:
			if (is_array($usergroupid))
			{
				$groups = $usergroupid;
				$cache = (bool)$cache;
			}
			else if (is_bool($cache))
			{
				// passed in 1 group and a cache state
				$groups = array($usergroupid);
			}
			else
			{
				// passed in 2 groups
				$groups = array($usergroupid, $cache);
				$cache = true;
			}
		break;

		default:
			// passed in 4+ args, which means it has to be in the 1,2,3 method
			$groups = func_get_args();
			unset($groups[0]);

			$cache = true;
	}

	if (!is_array($user_memberships["$userinfo[userid]"]) OR !$cache)
	{
		// fetch membergroup ids for this user
		$user_memberships["$userinfo[userid]"] = fetch_membergroupids_array($userinfo);
	}

	foreach ($groups AS $usergroupid)
	{
		// is current group user's primary usergroup, or one of their membergroups?
		if ($userinfo['usergroupid'] == $usergroupid OR in_array($usergroupid, $user_memberships["$userinfo[userid]"]))
		{
			// yes - return true
			return true;
		}
	}

	// if we get here then the user doesn't belong to any of the groups.
	return false;
}

This code is stored in a custom BB Code: [premiumvideo=imagefile.jpg]videofile.f4v[/premiumvideo]

Can someone here help me to get this working, please?