Familiar Sight Swap for Roll20 D&D 5E

FamiliarSightSwap.js

//Familiar Sight Swap
// make a macro with body:
// !SwapSight PlayerTokenName FamiliarTokenName

on("ready", function() {
    
    on("chat:message", function (msg) {
        
        if (msg.type === "api" && msg.content.split(' ')[0] === "!SwapSight")  {
            SwapSight(msg);
        }
    });

    function SwapSight(msg)
    {
        var campaign = findObjs({type: "campaign"})[0];
        var pageID = campaign.get("playerpageid");


        var playerToken = findObjs({type: 'graphic', _pageid: pageID, name: msg.content.split(' ')[1]})[0];
        var familiarToken = findObjs({type: 'graphic', _pageid: pageID, name: msg.content.split(' ')[2]})[0];
        if (!playerToken)
        {
            sendChat("", "/w " + msg.who + " Player Token Not Found On Page");
            return;
        }
        if (!familiarToken)
        {
            sendChat("", "/w " + msg.who + " Familiar Token Not Found On Page");
            return;
        }

        if(playerToken.get("light_hassight"))
        {
            familiarToken.set("light_hassight", true);
            playerToken.set("light_hassight", false);
        }
        else if (familiarToken.get("light_hassight"))
        {
            familiarToken.set("light_hassight", false);
            playerToken.set("light_hassight", true);
        }
        else
        {
            playerToken.set("light_hassight", true);
        }
    }
});