Add rock, paper, scissors, lizard, spock

bot/rps.go

@@ -12,6 +12,8 @@ const (
 	Rock = iota
 	Paper
 	Scissors
+	Lizard
+	Spock
 )
 
 var (

bot/rpsls.go

@@ -0,0 +1,82 @@
+package bot
+
+import (
+	"fmt"
+	"strings"
+
+	"git.kill0.net/chill9/beepboop/lib"
+	"github.com/bwmarrin/discordgo"
+)
+
+var (
+	rpslsVictoryMap map[int][]int = map[int][]int{
+		Rock:     {Scissors, Lizard},
+		Paper:    {Rock, Spock},
+		Scissors: {Paper, Lizard},
+		Lizard:   {Paper, Spock},
+		Spock:    {Scissors, Rock},
+	}
+
+	rpslsChoiceMap map[string]int = map[string]int{
+		"rock":     Rock,
+		"paper":    Paper,
+		"scissors": Scissors,
+		"lizard":   Lizard,
+		"spock":    Spock,
+	}
+
+	rpslsEmojiMap map[int]string = map[int]string{
+		Rock:     "🪨️",
+		Paper:    "📝",
+		Scissors: "✂️",
+		Lizard:   "🦎",
+		Spock:    "🖖",
+	}
+)
+
+func (b *Bot) RpslsCommand() CommandFunc {
+	return func(args []string, m *discordgo.MessageCreate) error {
+		var (
+			bc, pc int
+			be, pe string
+			c      string
+		)
+
+		if len(args) != 1 {
+			b.Session.ChannelMessageSend(
+				m.ChannelID, "help: `!rpsls (rock | paper | scissors | lizard | spock )`",
+			)
+			return nil
+		}
+
+		c = strings.ToLower(args[0])
+
+		pc, ok := rpslsChoiceMap[c] // player's choice
+		if !ok {
+			b.Session.ChannelMessageSend(
+				m.ChannelID, "help: `!rpsls (rock | paper | scissors | lizard | spock)`",
+			)
+		}
+
+		bc = lib.MapRand(rpslsChoiceMap) // bot's choice
+		pe = rpslsEmojiMap[pc]           // player's emoji
+		be = rpslsEmojiMap[bc]           // bot's emoji
+
+		if bc == pc {
+			b.Session.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
+				"%s v %s: draw", be, pe,
+			))
+			return nil
+		} else if lib.Contains(rpslsVictoryMap[bc], pc) {
+			b.Session.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
+				"%s v %s: %s wins", be, pe, lib.MapKey(rpslsChoiceMap, bc),
+			))
+			return nil
+		}
+
+		b.Session.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
+			"%s v %s: %s wins", be, pe, lib.MapKey(rpslsChoiceMap, pc),
+		))
+		return nil
+	}
+}