From 12372522e9c984c1b81b70e54157d679758d41d9 Mon Sep 17 00:00:00 2001
From: Ryan Cavicchioni <ryan@cavi.cc>
Date: Wed, 14 Sep 2022 08:35:21 -0500
Subject: [PATCH] Add rock, paper, scissors, lizard, spock

---
 bot/bot.go   |  5 ++++
 bot/rps.go   |  2 ++
 bot/rpsls.go | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 89 insertions(+)
 create mode 100644 bot/rpsls.go

diff --git a/bot/bot.go b/bot/bot.go
index 073424a..0ef1540 100644
--- a/bot/bot.go
+++ b/bot/bot.go
@@ -60,6 +60,11 @@ func (b *Bot) RegisterCommands() {
 		Func:  b.RpsCommand(),
 		NArgs: 1,
 	})
+	AddCommand(&Command{
+		Name:  "rpsls",
+		Func:  b.RpslsCommand(),
+		NArgs: 1,
+	})
 	AddCommand(&Command{
 		Name:  "time",
 		Func:  b.TimeCommand(),
diff --git a/bot/rps.go b/bot/rps.go
index ffce5af..2524ce7 100644
--- a/bot/rps.go
+++ b/bot/rps.go
@@ -12,6 +12,8 @@ const (
 	Rock = iota
 	Paper
 	Scissors
+	Lizard
+	Spock
 )
 
 var (
diff --git a/bot/rpsls.go b/bot/rpsls.go
new file mode 100644
index 0000000..5c3bc09
--- /dev/null
+++ b/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
+	}
+}