PvE

function removePrefix(str1: string, str2: string) :: string:
	first length of {_str2} characters of {_str1} is {_str2}
	return last length of {_str1} - length of {_str2} characters of {_str1}
function getLivingEntityFromUUID(uuid: string) :: living entity:
	loop all entities:
		UUID of loop-entity is {_uuid}
		return loop-entity
		stop loop
function getTagValues(e: entity) :: strings:
	set {_tagnbt} to "%tag ""Tags"" of nbt of {_e}%"
	replace "[""" and """]" in {_tagnbt} with ""
	return split {_tagnbt} by ""","""
command /customdrop [<text>] [<text>] [<text>]:
	permission: skript.admin
	permission message: &cYou do not permission to use this command.
	trigger:
		if arg-1 is not set:
			send "&cUsage: /customdrop <add|remove|give> <dropname> OR /customdrop drops"
		else if arg-1 is not "add" or "remove" or "give" or "drops":
			send "&cUsage: /customdrop <add|remove|give> <dropname> OR /customdrop drops"
		else if arg-1 is "add" or "remove" or "give":
			if arg-2 is not set:
				send "&cUsage: /customdrop %arg-1% <dropname>"
			else if arg-3 is set:
				send "&cドロップアイテム名に空白は使用できません"
			else if arg-1 is set:
				if arg-1 is "add":
					if {customdrops::%arg-2%} is set:
						send "&cドロップアイテム%arg-2%は既に存在しています"
					else if player's tool is air:
						send "&cメインハンドに追加したいアイテムを持ってください"
					else if player's tool is not air:
						set {customdrops::%arg-2%} to player's tool
						send "&e新しいドロップアイテム%arg-2%を追加しました"
				else if arg-1 is "remove":
					if {customdrops::%arg-2%} is not set:
						send "&cドロップアイテム%arg-2%は存在しません"
					else if {customdrops::%arg-2%} is set:
						delete {customdrops::%arg-2%}
						send "&eドロップアイテム%arg-2%を消去しました"
		else if arg-1 is "drops":
			if {customdrops::*} is not set:
				send "&c登録されているドロップアイテムはありません"
			else if {customdrops::*} is set:
				loop {customdrops::*}:
					set {_dropnames::%loop-index%} to loop-index
				send "%{_dropnames::*}%" to console
				set {_dropstext} to join {_dropnames::*} by "&f, &e"
				send "&7CustomDrops (%size of {customdrops::*}%): &e%{_dropstext}%"
on death:
	victim is a living entity
	victim is not a player
	victim is not armor stand
	set {_tags::*} to getTagValues(victim)
	if {_tags::*} contain "CustomDropOnly":
		clear drops
	loop {_tags::*}:
		set {_dropoptions::*} to loop-value split by ";"
		loop {_dropoptions::*}:
			if removePrefix(loop-value-2, "Drop:") is set:
				set {_customdropname} to removePrefix(loop-value-2, "Drop:")
			if removePrefix(loop-value-2, "DropChance:") is set:
				set {_dropchance} to removePrefix(loop-value-2, "DropChance:") parsed as number
			if removePrefix(loop-value-2, "MinAmount:") is set:
				set {_minamount} to removePrefix(loop-value-2, "MinAmount:") parsed as integer
			if removePrefix(loop-value-2, "MaxAmount:") is set:
				set {_maxamount} to removePrefix(loop-value-2, "MaxAmount:") parsed as integer
			if removePrefix(loop-value-2, "RareDrop:") is set:
				set {_raredrop} to removePrefix(loop-value-2, "RareDrop:") parsed as boolean
		{_customdropname} is set
		{_dropchance} is set
		{_minamount} is set
		{_maxamount} is set
		{_raredrop} is set
		if {_raredrop} is true:
			attacker is a player
			chance of {_dropchance}%:
				loop random integer between {_minamount} and {_maxamount} times:
					if {customdrops::%{_customdropname}%} is set:
						add {customdrops::%{_customdropname}%} to drops
					else if {customdrops::%{_customdropname}%} is not set:
						set {_dropitem} to {_customdropname} parsed as item
						{_dropitem} is set
						add {_dropitem} to drops
		else if {_raredrop} is false:
			chance of {_dropchance}%:
				loop random integer between {_minamount} and {_maxamount} times:
					if {customdrops::%{_customdropname}%} is set:
						add {customdrops::%{_customdropname}%} to drops
					else if {customdrops::%{_customdropname}%} is not set:
						set {_dropitem} to {_customdropname} parsed as item
						{_dropitem} is set
						add {_dropitem} to drops
		delete {_dropoptions::*}
		delete {_customdropname}
		delete {_dropchance}
		delete {_minamount}
		delete {_maxamount}
		delete {_raredrop}
		delete {_dropitem}
function deleteBossBar(bossbar: string):
	evaluate "remove all players from bar %{_bossbar}%"
	evaluate "delete %{_bossbar}%"
every tick:
	loop {bossbar::*}:
		getLivingEntityFromUUID(loop-index) is not set
		deleteBossBar("{bossbar::%loop-index%}")
	loop all entities:
		loop-entity is a living entity
		loop-entity is not a player
		set {_tags::*} to getTagValues(loop-entity)
		loop {_tags::*}:
			set {_bossbaroptions::*} to loop-value-2 split by ";"
			loop {_bossbaroptions::*}:
				if removePrefix(loop-value-3, "BarColor:") is set:
					set {_barcolor} to removePrefix(loop-value-3, "BarColor:")
				if removePrefix(loop-value-3, "BarStyle:") is set:
					set {_barstyle} to removePrefix(loop-value-3, "BarStyle:")
				if removePrefix(loop-value-3, "BarRange:") is set:
					set {_barrange} to removePrefix(loop-value-3, "BarRange:") parsed as number
			{_barcolor} is set
			{_barstyle} is set
			{_barrange} is set
			if {bossbar::%UUID of loop-entity%} is not set:
				set {bossbar::%UUID of loop-entity%} to new bossbar
				set color of bar {bossbar::%UUID of loop-entity%} to PINK
				set style of bar {bossbar::%UUID of loop-entity%} to SOLID
				evaluate "set color of bar {bossbar::%UUID of loop-entity%} to %{_barcolor} in upper case%"
				evaluate "set style of bar {bossbar::%UUID of loop-entity%} to %{_barstyle} in upper case%"
			if name of loop-entity is set:
				set name of bar {bossbar::%UUID of loop-entity%} to name of loop-entity
			else:
				set name of bar {bossbar::%UUID of loop-entity%} to "%loop-entity%"
			set progress of bar {bossbar::%UUID of loop-entity%} to health of loop-entity/max health of loop-entity
			loop all players:
				if distance between loop-entity-1 and loop-player-1 <= {_barrange}:
					add loop-player-1 to bar {bossbar::%UUID of loop-entity-1%}
				else:
					remove loop-player-1 from bar {bossbar::%UUID of loop-entity-1%}
		delete {_tags::*}
		delete {_bossbaroptions::*}
		delete {_barcolor}
		delete {_barstyle}
		delete {_barrange}