function addTab(name: string, skin: skin, players: players, uuid: string = "") :: string:
  set {_packet} to new play_server_player_info packet
  set "PlayerInfoAction" penum 0 of {_packet} to "ADD_PLAYER"
  set {_a::gamemode} to creative
  set {_a::gameprofile::name} to {_name}
  set {_a::gameprofile::skin} to {_skin}
  set {_a::latency} to 0
  set {_uuid} to ({_uuid} === "" ? new uuid : {_uuid})
  set {_a::gameprofile::uuid} to {_uuid}
  set "PlayerInfoData" array pjson 0 of {_packet} to json of listvar {_a::*}
  loop {_players::*}:
    send loop-value packet {_packet}
  return {_uuid}
function skin(i: int = 0) :: skin:
  return skin with value "eyJ0aW1lc3RhbXAiOjE0OTkwMDg3MTU3MzQsInByb2ZpbGVJZCI6IjQzNTg3MjhkZGQ1NDQ5NDM4ZGYwZWRlMTkzODJmYmQ2IiwicHJvZmlsZU5hbWUiOiJ1bW1vYmVhciIsInNpZ25hdHVyZVJlcXVpcmVkIjp0cnVlLCJ0ZXh0dXJlcyI6eyJTS0lOIjp7Im1ldGFkYXRhIjp7Im1vZGVsIjoic2xpbSJ9LCJ1cmwiOiJodHRwOi8vdGV4dHVyZXMubWluZWNyYWZ0Lm5ldC90ZXh0dXJlL2FiYmYxZmY5YTdjMmIwMTRmMzI2YWQxZDg0ZDZmNzlkZThkYWYzNjk1NzIxOTg4MTNlZmI1Yzc2MDcxZTM2MCJ9fX0=" signature "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"
function newUUID(i: int = 0) :: string:
  return "%a random integer between 10000000 and 99999999%-%a random integer between 1000 and 9999%-%a random integer between 1000 and 9999%-%a random integer between 1000 and 9999%-%a random integer between 100000000000 and 999999999999%"
on packet event play_server_named_entity_spawn:
  set {metadata} to "DataWatcherModifier" pinfo 0 of event-packet
function spawnNPC(name: string, skin: skin, location: location, players: players, item: itemtype, uuid: string = ""):
  set {_npcspawn} to new play_server_named_entity_spawn packet
  set int pnum 0 of {_npcspawn} to a random integer from 5000 to 10000
  set "uuid" pinfo 0 of {_npcspawn} to ({_uuid} === "" ? addTab({_name}, {_skin}, {_players::*}) : addTab({_name}, {_skin}, {_players::*}, {_uuid}))
  set int pnum 1 of {_npcspawn} to x-loc of {_location} * 32
  set int pnum 2 of {_npcspawn} to y-loc of {_location} * 32
  set int pnum 3 of {_npcspawn} to z-loc of {_location} * 32
  set byte pnum 0 of {_npcspawn} to 0
  set byte pnum 1 of {_npcspawn} to 0
  set "DataWatcherModifier" pinfo 0 of {_npcspawn} to {metadata}
  set short pnum 0 of {_npcspawn} to 1
  loop {_players::*}:
    send loop-value packet {_npcspawn}
function typeId(entity: string) :: object: #I have to use string here because the entitytype type is... weird, and not all of them match up with wiki.vg
  switch {_entity}: #everything is here except things marked as blue on wiki.vg
    case "Item":
      return 2
    case "AreaEffectCloud":
      return 3
    case "ElderGuardian":
      return 4
    case "WitherSkeleton":
      return 5
    case "Stray":
      return 6
    case "ThrownEgg":
      return 62
    case "LeashKnot":
      return 77
    case "Arrow":
      return 60
    case "Snowball":
      return 61
    case "Fireball":
      return 63
    case "SmallFireball":
      return 64
    case "ThrownEnderpearl":
      return 14
    case "EyeOfEnderSignal":
      return 72
    case "ThrownPotion":
      return 73
    case "ThrownExpBottle":
      return 75
    case "ItemFrame":
      return 71
    case "WitherSkull":
      return 66
    case "PrimedTnt":
      return 50
    case "FallingSand":
      return 70
    case "FireworksRocketEntity":
      return 76
    case "Husk":
      return 23
    case "SpectralArrow":
      return 91
    case "ShulkerBullet":
      return 67
    case "DragonFireball":
      return 93
    case "ZombieVillager":
      return 27
    case "SkeletonHorse":
      return 28
    case "ZombieHorse":
      return 29
    case "ArmorStand":
      return 30 #careful, this will crash your game if you don't send it right
    case "Donkey":
      return 31
    case "Mule":
      return 32
    case "EvocationFangs":
      return 79
    case "EvocationIllager":
      return 34
    case "Vex":
      return 35
    case "VindicationIllager":
      return 36
    case "IllusionIllager":
      return 37
    case "MinecartCommandBlock":
      return 10
    case "Boat":
      return 1
    case "MinecartRideable":
      return 10
    case "MinecartChest":
      return 10
    case "MinecartTNT":
      return 10
    case "MinecartHopper":
      return 10
    case "MinecartSpawner":
      return 10
    case "Creeper":
      return 50
    case "Skeleton":
      return 51
    case "Spider":
      return 52
    case "Giant":
      return 53
    case "Zombie":
      return 54
    case "Slime":
      return 55
    case "Ghast":
      return 56
    case "PigZombie":
      return 57
    case "Enderman":
      return 58
    case "CaveSpider":
      return 59
    case "Silverfish":
      return 60
    case "Blaze":
      return 61
    case "LavaSlime":
      return 62
    case "EnderDragon":
      return 63
    case "WitherBoss":
      return 64
    case "Bat":
      return 65
    case "Witch":
      return 66
    case "Endermite":
      return 67
    case "Guardian":
      return 68
    case "Shulker":
      return 69
    case "Pig":
      return 90
    case "Sheep":
      return 91
    case "Cow":
      return 92
    case "Chicken":
      return 93
    case "Squid":
      return 94
    case "Wolf":
      return 95
    case "MushroomCow":
      return 96
    case "SnowMan":
      return 97
    case "Ozelot":
      return 98
    case "VillagerGolem":
      return 99
    case "Horse":
      return 100
    case "EntityHorse":
      return 100
    case "Rabbit":
      return 101
    case "PolarBear":
      return 102
    case "Llama":
      return 103
    case "LlamaSpit":
      return 68
    case "Parrot":
      return 105
    case "Villager":
      return 120
    case "EnderCrystal":
      return 51
  return false

function spawnClientMob(entity: string, location: location, viewers: players, entityid: int = 69420) :: object:
  if typeId({_entity}) is false: #if the given entity isn't in the typeId() function, stop the function by returning false so that the calling code can detect there was an issue if it chooses to
    return false
  set {_packet} to new play_server_spawn_entity_living packet
  if {_entityid} is 69420: #if a custom id wasn't specified
    set int pnum 0 of {_packet} to a random integer from 50000 to 100000 #set the entity id to a number that won't realitically ever cause problems
  else: #if a custom id WAS specified
    set int pnum 0 of {_packet} to {_entityid} #set the entity id to the given id
  set int pnum 1 of {_packet} to "%typeId({_entity})%" parsed as a number #get the type id used to identify the given mob in packets, has to be parsed as a number because the function returns object
  #set the coordinates
  set int pnum 2 of {_packet} to {_location}'s x-loc * 32
  set int pnum 3 of {_packet} to {_location}'s y-loc * 32
  set int pnum 4 of {_packet} to {_location}'s z-loc * 32
  #set the pitch/yaw
  loop 5 and 6:
    set int pnum loop-value of {_packet} to 0
  #set the velocity
  loop 7, 8 and 9 :
    set int pnum loop-value of {_packet} to 0
  #send all the players that should see the mob the packet
  loop {_viewers::*}:
    send loop-value packet {_packet}
  return "%int pnum 0 of {_packet}%" parsed as an int #if we've gotten this far, return the entity id in case the calling code needs to use it to manipulate the spawned mob

function clientBlock(location: location, type: item, viewers: players):
  set {_packet} to new play_server_block_change packet
  set location pinfo 0 of {_packet} to {_location}
  set "BlockData" pinfo 0 of {_packet} to {_type} # as seen on packetwrapper, this uses the blockdata pinfo
  loop {_viewers::*}: #show peeps the new block
    send loop-value packet {_packet}
function returnItem(i: item) :: item:
  return {_i}