dice roll

Shitpost.py

@@ -346,8 +346,62 @@ class Shitpost(object):
 		else:
 			yield from ctx.channel.send(ctx.author.mention + ' Het is nu ' + datetime.now().strftime('%H:%M'))
 
-			#Used by function weer()
-	
+			
+	@commands.command(pass_context=True)
+	@asyncio.coroutine
+	def roll(self, ctx, dice="1d20", modifier1="", modifier2=""):
+		"""Roll een dobbelsteen. Of een paar. Bijvoorbeeld:
+		!roll 4d20
+		!roll 1d6 + 5
+		"""
+		diceSplit = dice.lower().split('d')
+		if len(diceSplit) != 2:
+			return
+		modifier1 = modifier1.replace("+", "") #this is both possible: "1d20 + 1" and "1d20 +1"
+		modifier2 = modifier2.replace("+", "")
+		if modifier1 == "-":
+			modifier1 = ""; #this is also possible: "1d20 - 1"
+			modifier2 = "-" + modifier2
+		try: #check if they are numbers:
+			nrOfDice = 1 if (diceSplit[0]=="") else int(diceSplit[0]) #allow input like: "!roll d20"
+			dieType = int(diceSplit[1])
+			mod1 = 0 if (modifier1=="") else int(modifier1)
+			mod2 = 0 if (modifier2=="") else int(modifier2)
+		except ValueError:
+			return
+		#validate values:	
+		if nrOfDice < 1 or nrOfDice > 99 or dieType < 2 or dieType > 100:
+			return
+		if mod1 < -999 or mod1 > 999 or mod2 < -999 or mod2 > 999:
+			return
+		
+		#roll:
+		random.seed(datetime.now())
+		total = 0
+		returnText = "Rolling " + str(nrOfDice) + "d" + str(dieType) + "...\n"
+		for x in range(0, nrOfDice):
+			if x != 0:
+				returnText += "+ "
+			roll = random.randint(1, dieType)
+			total += roll
+			if dieType >= 10 and (roll == 1 or roll == dieType):
+				returnText += "[**" + str(roll) + "**] " #make significant numbers bold
+			else:
+				returnText += "[" + str(roll) + "] "
+		total += mod1 + mod2
+		if mod1 != 0: 
+			if mod1 > 0:
+				returnText += "+"
+			returnText += str(mod1) + " "
+		if mod2 != 0:
+			if mod2 > 0:
+				returnText += "+"
+			returnText += str(mod2) + " "
+		if nrOfDice > 1 or mod1 != 0 or mod2 != 0: #only show calculation if it makes sense:
+			returnText += " =  __**" + str(total) + "**__"
+		
+		yield from ctx.channel.send(returnText)		
+
 
 	@commands.command(pass_context=True)
 	@asyncio.coroutine