Roll20API: MonsterHitDice5e -- Monster Hit Dice script setup to work with Actoba's 5th Edition character sheet for NPCs

MonsterHitDice5e

// GIST: https://gist.github.com/shdwjk/941cee5942ac4275d9ea

on('ready', function() {
    on('add:graphic',function(obj) {
        if(
               'graphic' === obj.get('type') 
            && 'token'   === obj.get('subtype') 
        ) {
            setTimeout(_.bind(function(id){
                var obj=getObj('graphic',id)
               
                if( undefined !== obj 
                    && '' !== obj.get('represents')
                    && '' === obj.get('bar3_link') ) {
                    var attrib = findObjs({
                        _type: 'attribute', 
                        _characterid:obj.get('represents'),
                        name: 'npc_HP_hit_dice'
                    })
                    if( attrib.length ) {
                        sendChat('','/r '+attrib[0].get('current'),function(r){
                            var hp=0;
                            _.each(r,function(subr){
                                var val=JSON.parse(subr.content);
                                if(_.has(val,'total')) {
                                    hp+=val.total;
                                }
                            });
                            obj.set({
                                bar3_value: hp,
                                bar3_max: hp
                            })
                        });
                    }
                }
                
            },this,obj.id), 500);
        }
    });
});