Refactored handlers and command handlers

There was a false error reported when the configuration file was found

.drone.yml

@@ -0,0 +1,13 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: lint
+    image: golangci/golangci-lint
+    commands:
+      - golangci-lint run
+  - name: build
+    image: golang
+    commands:
+      - go build ./cmd/bb

.golangci.yml

@@ -0,0 +1,4 @@
+---
+linters:
+  disable:
+    - errcheck

Dockerfile

@@ -6,4 +6,6 @@ RUN CGO_ENABLED=0 go build ./cmd/bb
 FROM scratch AS bin
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=build /src/bb /
+ADD https://raw.githubusercontent.com/golang/go/master/lib/time/zoneinfo.zip /zoneinfo.zip
+ENV ZONEINFO /zoneinfo.zip
 ENTRYPOINT ["/bb"]

bot/bot.go

@@ -0,0 +1,239 @@
+package bot
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"git.kill0.net/chill9/beepboop/command"
+	"git.kill0.net/chill9/beepboop/config"
+	"git.kill0.net/chill9/beepboop/handler"
+	"git.kill0.net/chill9/beepboop/lib"
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+var C *config.Config
+
+type (
+	Bot struct {
+		config   *config.Config
+		session  *discordgo.Session
+		commands map[string]*Command
+	}
+
+	Command struct {
+		Name  string
+		Func  CommandFunc
+		NArgs int
+	}
+
+	CommandFunc func(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error
+
+	MessageHandler func(s *discordgo.Session, m *discordgo.MessageCreate)
+)
+
+func init() {
+	pflag.Bool("debug", false, "enable debug mode")
+	pflag.Parse()
+
+	viper.BindPFlags(pflag.CommandLine)
+}
+
+func NewBot(config *config.Config, s *discordgo.Session) *Bot {
+	return &Bot{
+		session:  s,
+		commands: make(map[string]*Command),
+	}
+}
+
+func (b *Bot) AddHandler(handler interface{}) func() {
+	return b.session.AddHandler(handler)
+}
+
+func (b *Bot) AddCommand(cmd *Command) {
+	b.commands[cmd.Name] = cmd
+}
+
+func (b *Bot) GetCommand(name string) (*Command, bool) {
+	cmd, ok := b.commands[name]
+	return cmd, ok
+}
+
+func (b *Bot) CommandHandler(s *discordgo.Session, m *discordgo.MessageCreate) {
+	if m.Author.ID == s.State.User.ID {
+		return
+	}
+
+	if !lib.HasCommand(m.Content, b.config.Prefix) {
+		return
+	}
+
+	cmdName, arg := lib.SplitCommandAndArg(m.Content, b.config.Prefix)
+
+	cmd, ok := b.GetCommand(cmdName)
+	if !ok {
+		return
+	}
+
+	args := lib.SplitArgs(arg, cmd.NArgs)
+
+	if ok {
+		log.Debugf("command: %v, args: %v, nargs: %d", cmd.Name, args, len(args))
+		if err := cmd.Func(args, s, m); err != nil {
+			log.Errorf("failed to execute command: %s", err)
+		}
+
+		return
+	}
+
+	log.Warnf("unknown command: %v, args: %v, nargs: %d", cmdName, args, len(args))
+	s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("unknown command: %s", cmdName))
+}
+
+func (b *Bot) Init(h *handler.Handlers, ch *command.Handlers) {
+	// Register handlers
+	b.AddHandler(h.Reaction)
+
+	// Register commands
+	b.AddCommand(&Command{
+		Name: "coin",
+		Func: ch.Coin,
+	})
+	b.AddCommand(&Command{
+		Name:  "deal",
+		Func:  ch.Deal,
+		NArgs: 1,
+	})
+	b.AddCommand(&Command{
+		Name: "ping",
+		Func: ch.Ping,
+	})
+	b.AddCommand(&Command{
+		Name:  "roll",
+		Func:  ch.Roll,
+		NArgs: 1,
+	})
+	b.AddCommand(&Command{
+		Name: "roulette",
+		Func: ch.Roulette,
+	})
+	b.AddCommand(&Command{
+		Name:  "rps",
+		Func:  ch.Rps,
+		NArgs: 1,
+	})
+	b.AddCommand(&Command{
+		Name:  "rpsls",
+		Func:  ch.Rpsls,
+		NArgs: 1,
+	})
+	b.AddCommand(&Command{
+		Name:  "time",
+		Func:  ch.Time,
+		NArgs: 1,
+	})
+	b.AddCommand(&Command{
+		Name: "version",
+		Func: ch.Version,
+	})
+	b.AddCommand(&Command{
+		Name:  "weather",
+		Func:  ch.Weather,
+		NArgs: 1,
+	})
+}
+
+func Run() error {
+	initConfig()
+	go reloadConfig()
+
+	if err := lib.SeedMathRand(); err != nil {
+		log.Warn(err)
+	}
+
+	if C.DiscordToken == "" {
+		return errors.New("discord token not set")
+	}
+
+	dg, err := discordgo.New(fmt.Sprintf("Bot %s", C.DiscordToken))
+	if err != nil {
+		return fmt.Errorf("error creating discord session: %v", err)
+	}
+
+	b := NewBot(C, dg)
+	b.Init(handler.NewHandlers(C), command.NewHandlers(C))
+
+	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsDirectMessages
+
+	if err = dg.Open(); err != nil {
+		return fmt.Errorf("error opening connection: %v", err)
+	}
+
+	log.Info("The bot is now running. Press CTRL-C to exit.")
+
+	defer dg.Close()
+
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM)
+	<-sc
+
+	log.Info("Shutting down")
+
+	return nil
+}
+
+func initConfig() {
+	C = config.NewConfig()
+
+	viper.SetEnvPrefix("BEEPBOOP")
+	viper.AutomaticEnv()
+
+	viper.SetConfigName("config")
+	viper.SetConfigType("toml")
+	viper.AddConfigPath(".")
+
+	viper.SetDefault("debug", false)
+
+	viper.BindEnv("DISCORD_TOKEN")
+	viper.BindEnv("OPEN_WEATHER_MAP_TOKEN")
+
+	loadConfig()
+}
+
+func loadConfig() {
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			log.Fatalf("fatal error config file: %v", err)
+		}
+	}
+
+	log.WithField("filename", viper.ConfigFileUsed()).Info(
+		"loaded configuration file",
+	)
+
+	err := viper.Unmarshal(&C)
+	if err != nil {
+		log.Fatalf("unable to decode into struct: %v", err)
+	}
+
+	if viper.GetBool("debug") {
+		log.SetLevel(log.DebugLevel)
+	} else {
+		log.SetLevel(log.InfoLevel)
+	}
+}
+
+func reloadConfig() {
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGHUP)
+	for {
+		<-sc
+
+		loadConfig()
+	}
+}

bot/config.go

@@ -1,41 +0,0 @@
-package bot
-
-const (
-	defaultPrefix = "!"
-)
-
-var (
-	defaultReactions []string = []string{"👍", "🌶️", "🤣", "😂", "🍆", "🍑", "❤️", "💦", "😍", "💩", "🔥", "🍒", "🎉", "🥳", "🎊"}
-)
-
-type (
-	Config struct {
-		Handler             HandlerConfig `mapstructure:"handler"`
-		Prefix              string        `mapstructure:"prefix"`
-		DiscordToken        string        `mapstructure:"discord_token"`
-		OpenWeatherMapToken string        `mapstructure:"open_weather_map_token"`
-	}
-
-	HandlerConfig struct {
-		Reaction ReactionConfig `mapstructure:"reaction"`
-		Weather  WeatherConfig  `mapstructure:"weather"`
-	}
-
-	ReactionConfig struct {
-		Emojis   []string
-		Channels []string
-	}
-
-	WeatherConfig struct {
-		Token string `mapstructure:"token"`
-	}
-)
-
-func NewConfig() Config {
-	var c Config
-
-	c.Prefix = defaultPrefix
-	c.Handler.Reaction.Emojis = defaultReactions
-
-	return c
-}

bot/handlers.go

@@ -1,10 +0,0 @@
-package bot
-
-import (
-	"github.com/bwmarrin/discordgo"
-)
-
-type MessageCreateHandler interface {
-	Handle(s *discordgo.Session, m *discordgo.MessageCreate)
-	SetConfig(config Config)
-}

cmd/bb/main.go

@@ -1,110 +1,13 @@
 package main
 
 import (
-	"flag"
-	"fmt"
-
-	//"log"
-
-	"os"
-	"os/signal"
-	"syscall"
-
 	"git.kill0.net/chill9/beepboop/bot"
-	handler "git.kill0.net/chill9/beepboop/bot/handlers"
-	"git.kill0.net/chill9/beepboop/command"
-	"git.kill0.net/chill9/beepboop/lib"
 
-	"github.com/bwmarrin/discordgo"
 	log "github.com/sirupsen/logrus"
-	"github.com/spf13/pflag"
-	"github.com/spf13/viper"
-)
-
-var (
-	C bot.Config
-
-	handlers []command.CommandHandler = []command.CommandHandler{
-		command.NewCoinHandler(),
-		command.NewPingHandler(),
-		command.NewRollHandler(),
-		command.NewRouletteHandler(),
-		command.NewTimeHandler(),
-		command.NewVersionHandler("version"),
-		command.NewWeatherHandler(),
-		handler.NewReactionHandler(),
-	}
 )
 
 func main() {
-	setupConfig()
-
-	lib.SeedMathRand()
-
-	if C.DiscordToken == "" {
-		log.Fatalf("Discord token is not set")
-	}
-
-	dg, err := discordgo.New(fmt.Sprintf("Bot %s", C.DiscordToken))
-	if err != nil {
-		log.Fatalf("error creating Discord session: %v\n", err)
-	}
-
-	for _, h := range handlers {
-		h.SetConfig(C)
-		dg.AddHandler(h.Handle)
-	}
-
-	dg.Identify.Intents = discordgo.IntentsGuildMessages
-
-	err = dg.Open()
-	if err != nil {
-		log.Fatalf("error opening connection: %v\n", err)
-	}
-
-	log.Info("The bot is now running. Press CTRL-C to exit.")
-
-	defer dg.Close()
-
-	sc := make(chan os.Signal, 1)
-	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt, os.Kill)
-	<-sc
-
-	log.Info("Shutting down")
-}
-
-func setupConfig() {
-	var err error
-
-	C = bot.NewConfig()
-
-	flag.Bool("debug", false, "enable debug logging")
-	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
-	pflag.Parse()
-	viper.BindPFlags(pflag.CommandLine)
-
-	if viper.GetBool("debug") {
-		log.SetLevel(log.DebugLevel)
-	}
-
-	viper.SetEnvPrefix("BEEPBOOP")
-	viper.AutomaticEnv()
-
-	viper.SetConfigName("config")
-	viper.SetConfigType("toml")
-	viper.AddConfigPath(".")
-
-	err = viper.ReadInConfig()
-
-	viper.BindEnv("DISCORD_TOKEN")
-	viper.BindEnv("OPEN_WEATHER_MAP_TOKEN")
-
-	if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
-		log.Fatalf("fatal error config file: %v", err)
-	}
-
-	err = viper.Unmarshal(&C)
-	if err != nil {
-		log.Fatalf("unable to decode into struct: %v", err)
+	if err := bot.Run(); err != nil {
+		log.Fatal(err)
 	}
 }

command/coin.go

@@ -0,0 +1,29 @@
+package command
+
+import (
+	"git.kill0.net/chill9/beepboop/lib"
+	"github.com/bwmarrin/discordgo"
+)
+
+type Coin bool
+
+func (c *Coin) Flip() bool {
+	*c = Coin(lib.Itob(lib.RandInt(0, 1)))
+	return bool(*c)
+}
+
+func (h *Handlers) Coin(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	var (
+		c   Coin
+		msg string
+	)
+
+	if c.Flip() {
+		msg = "heads"
+	} else {
+		msg = "tails"
+	}
+
+	s.ChannelMessageSend(m.ChannelID, msg)
+	return nil
+}

command/command.go

@@ -1,11 +0,0 @@
-package command
-
-import (
-	"git.kill0.net/chill9/beepboop/bot"
-	"github.com/bwmarrin/discordgo"
-)
-
-type CommandHandler interface {
-	Handle(s *discordgo.Session, m *discordgo.MessageCreate)
-	SetConfig(config bot.Config)
-}

command/commands.go

@@ -0,0 +1,11 @@
+package command
+
+import "git.kill0.net/chill9/beepboop/config"
+
+type Handlers struct {
+	config *config.Config
+}
+
+func NewHandlers(config *config.Config) *Handlers {
+	return &Handlers{config: config}
+}

command/deal.go

@@ -0,0 +1,83 @@
+package command
+
+import (
+	"errors"
+	"fmt"
+	"math/rand"
+	"strconv"
+	"strings"
+
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+)
+
+type (
+	Card string
+
+	Deck [52]Card
+)
+
+var deck Deck = Deck{
+	"2♣", "3♣", "4♣", "5♣", "6♣", "7♣", "8♣", "9♣", "10♣", "J♣", "Q♣", "K♣", "A♣",
+	"2♦", "3♦", "4♦", "5♦", "6♦", "7♦", "8♦", "9♦", "10♦", "J♦", "Q♦", "K♦", "A♦",
+	"2♥", "3♥", "4♥", "5♥", "6♥", "7♥", "8♥", "9♥", "10♥", "J♥", "Q♥", "K♥", "A♥",
+	"2♠", "3♠", "4♠", "5♠", "6♠", "7♠", "8♠", "9♠", "10♠", "J♠", "Q♠", "K♠", "A♠",
+}
+
+func (d *Deck) Deal(n int) ([]Card, error) {
+	var (
+		hand []Card
+		err  error
+	)
+
+	if n < 1 {
+		err = errors.New("number cannot be less than 1")
+		return hand, err
+	}
+
+	if n > len(d) {
+		err = errors.New("number is greater than cards in the deck")
+		return hand, err
+	}
+
+	hand = deck[0:n]
+
+	return hand, err
+}
+
+func (h *Handlers) Deal(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	rand.Shuffle(len(deck), func(i, j int) {
+		deck[i], deck[j] = deck[j], deck[i]
+	})
+
+	log.Debugf("%+v", deck)
+
+	if len(args) != 1 {
+		s.ChannelMessageSend(m.ChannelID, "help: `!deal <n>`")
+		return nil
+	}
+
+	n, err := strconv.Atoi(args[0])
+	if err != nil {
+		log.Errorf("failed to convert string to int: %s", err)
+	}
+
+	hand, err := deck.Deal(n)
+	if err != nil {
+		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("error: %s\n", err))
+		return nil
+	}
+
+	s.ChannelMessageSend(m.ChannelID, JoinCards(hand, " "))
+	return nil
+}
+
+func JoinCards(h []Card, sep string) string {
+	b := make([]string, len(h))
+
+	for i, v := range h {
+		b[i] = string(v)
+	}
+
+	return strings.Join(b, sep)
+}

command/dice.go

@@ -0,0 +1,103 @@
+package command
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"git.kill0.net/chill9/beepboop/lib"
+
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	MaxDice  = 100
+	MaxSides = 100
+)
+
+type (
+	Roll struct {
+		N, D, Sum int
+		Rolls     []int
+		S         string
+	}
+)
+
+func NewRoll(n, d int) *Roll {
+	r := new(Roll)
+	r.N = n
+	r.D = d
+	r.S = fmt.Sprintf("%dd%d", r.N, r.D)
+	return r
+}
+
+func ParseRoll(roll string) (*Roll, error) {
+	var (
+		dice []string
+		err  error
+		n, d int
+	)
+
+	match, _ := regexp.MatchString(`^(?:\d+)?d\d+$`, roll)
+
+	if !match {
+		return nil, errors.New("invalid roll, use `<n>d<sides>` e.g. `4d6`")
+	}
+
+	dice = strings.Split(roll, "d")
+
+	if dice[0] == "" {
+		n = 1
+	} else {
+		n, err = strconv.Atoi(dice[0])
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	d, err = strconv.Atoi(dice[1])
+	if err != nil {
+		return nil, err
+	}
+
+	if n > MaxDice || d > MaxSides {
+		return nil, fmt.Errorf("invalid roll, n must be <= %d and sides must be <= %d", MaxDice, MaxSides)
+	}
+
+	return NewRoll(n, d), nil
+}
+
+func (r *Roll) RollDice() {
+	for i := 1; i <= r.N; i++ {
+		roll := lib.RandInt(1, r.D)
+		r.Rolls = append(r.Rolls, roll)
+		r.Sum += roll
+	}
+}
+
+func (h *Handlers) Roll(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	var (
+		err       error
+		msg, roll string
+		r         *Roll
+	)
+
+	roll = args[0]
+
+	r, err = ParseRoll(roll)
+	if err != nil {
+		s.ChannelMessageSend(m.ChannelID, err.Error())
+		return nil
+	}
+
+	r.RollDice()
+	log.Debugf("rolled dice: %+v", r)
+
+	msg = fmt.Sprintf("🎲 %s = %d", lib.JoinInt(r.Rolls, " + "), r.Sum)
+
+	s.ChannelMessageSend(m.ChannelID, msg)
+	return nil
+}

command/ping.go

@@ -1,37 +1,10 @@
 package command
 
 import (
-	"strings"
-
-	"git.kill0.net/chill9/beepboop/bot"
 	"github.com/bwmarrin/discordgo"
-	log "github.com/sirupsen/logrus"
 )
 
-type (
-	PingHandler struct {
-		config bot.Config
-	}
-)
-
-func NewPingHandler() *PingHandler {
-	return new(PingHandler)
-}
-
-func (h *PingHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *PingHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !strings.HasPrefix(m.Content, "!ping") {
-		return
-	}
-
-	log.Debug("received ping")
-
+func (h *Handlers) Ping(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
 	s.ChannelMessageSend(m.ChannelID, "pong")
+	return nil
 }

command/random.go

@@ -1,258 +0,0 @@
-package command
-
-import (
-	"errors"
-	"fmt"
-	"regexp"
-	"strconv"
-	"strings"
-
-	"git.kill0.net/chill9/beepboop/bot"
-	"github.com/bwmarrin/discordgo"
-
-	log "github.com/sirupsen/logrus"
-)
-
-const (
-	MaxDice         = 100
-	MaxSides        = 100
-	Bullets         = 1
-	GunFireMessage  = "💀🔫"
-	GunClickMessage = "😌🔫"
-)
-
-type (
-	Roll struct {
-		N, D, Sum int
-		Rolls     []int
-		S         string
-	}
-
-	Coin bool
-
-	Gun struct {
-		C [6]bool
-		N int
-	}
-
-	CoinHandler struct {
-		config bot.Config
-	}
-	RollHandler struct {
-		config bot.Config
-	}
-
-	RouletteHandler struct {
-		config bot.Config
-	}
-)
-
-var (
-	gun *Gun
-)
-
-func init() {
-	gun = NewGun()
-}
-
-func NewRoll(n, d int) *Roll {
-	r := new(Roll)
-	r.N = n
-	r.D = d
-	r.S = fmt.Sprintf("%dd%d", r.N, r.D)
-	return r
-}
-
-func ParseRoll(roll string) (*Roll, error) {
-	var (
-		dice []string
-		err  error
-		n, d int
-	)
-
-	match, _ := regexp.MatchString(`^(?:\d+)?d\d+$`, roll)
-
-	if !match {
-		return nil, errors.New("invalid roll, use `<n>d<sides>` e.g. `4d6`")
-	}
-
-	dice = strings.Split(roll, "d")
-
-	if dice[0] == "" {
-		n = 1
-	} else {
-		n, err = strconv.Atoi(dice[0])
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	d, err = strconv.Atoi(dice[1])
-	if err != nil {
-		return nil, err
-	}
-
-	if n > MaxDice || d > MaxSides {
-		return nil, fmt.Errorf("invalid roll, n must be <= %d and sides must be <= %d", MaxDice, MaxSides)
-	}
-
-	return NewRoll(n, d), nil
-}
-
-func (r *Roll) RollDice() {
-	for i := 1; i <= r.N; i++ {
-		roll := RandInt(1, r.D)
-		r.Rolls = append(r.Rolls, roll)
-		r.Sum += roll
-	}
-}
-
-func (c *Coin) Flip() bool {
-	*c = Coin(Itob(RandInt(0, 1)))
-	return bool(*c)
-}
-
-func NewGun() *Gun {
-	return new(Gun)
-}
-
-func (g *Gun) Load(n int) {
-	g.N = 0
-	for i := 1; i <= n; {
-		x := RandInt(0, len(g.C)-1)
-		if g.C[x] == false {
-			g.C[x] = true
-			i++
-		} else {
-			continue
-		}
-	}
-}
-
-func (g *Gun) Fire() bool {
-	if g.C[g.N] {
-		g.C[g.N] = false
-		g.N++
-		return true
-	}
-
-	g.N++
-	return false
-}
-
-func (g *Gun) IsEmpty() bool {
-	for _, v := range g.C {
-		if v == true {
-			return false
-		}
-	}
-
-	return true
-}
-
-func NewRollHandler() *RollHandler {
-	return new(RollHandler)
-}
-
-func (h *RollHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *RollHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	var (
-		err       error
-		msg, roll string
-		r         *Roll
-	)
-
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !strings.HasPrefix(m.Content, "!roll") {
-		return
-	}
-
-	x := strings.Split(m.Content, " ")
-
-	if len(x) != 2 {
-		s.ChannelMessageSend(m.ChannelID, "help: `!roll <n>d<s>`")
-		return
-	}
-
-	roll = x[1]
-
-	r, err = ParseRoll(roll)
-	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
-		return
-	}
-
-	r.RollDice()
-	log.Debugf("rolled dice: %+v", r)
-
-	msg = fmt.Sprintf("🎲 %s = %d", JoinInt(r.Rolls, " + "), r.Sum)
-
-	s.ChannelMessageSend(m.ChannelID, msg)
-}
-
-func NewRouletteHandler() *RouletteHandler {
-	return new(RouletteHandler)
-}
-
-func (h *RouletteHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *RouletteHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !strings.HasPrefix(m.Content, "!roulette") {
-		return
-	}
-
-	if gun.IsEmpty() {
-		gun.Load(Bullets)
-		log.Debugf("reloading gun: %+v\n", gun)
-	}
-
-	log.Debugf("firing gun: %+v\n", gun)
-	if gun.Fire() {
-		s.ChannelMessageSend(m.ChannelID, GunFireMessage)
-	} else {
-		s.ChannelMessageSend(m.ChannelID, GunClickMessage)
-	}
-}
-
-func NewCoinHandler() *CoinHandler {
-	return new(CoinHandler)
-}
-
-func (h *CoinHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *CoinHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	var (
-		c   Coin
-		msg string
-	)
-
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !strings.HasPrefix(m.Content, "!coin") {
-		return
-	}
-
-	if c.Flip() {
-		msg = "heads"
-	} else {
-		msg = "tails"
-	}
-
-	s.ChannelMessageSend(m.ChannelID, msg)
-}

command/roulette.go

@@ -0,0 +1,82 @@
+package command
+
+import (
+	"git.kill0.net/chill9/beepboop/lib"
+
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	Bullets         = 1
+	GunFireMessage  = "💀🔫"
+	GunClickMessage = "😌🔫"
+)
+
+type (
+	Gun struct {
+		C [6]bool
+		N int
+	}
+)
+
+var (
+	gun *Gun
+)
+
+func init() {
+	gun = NewGun()
+}
+
+func NewGun() *Gun {
+	return new(Gun)
+}
+
+func (g *Gun) Load(n int) {
+	g.N = 0
+	for i := 1; i <= n; {
+		x := lib.RandInt(0, len(g.C)-1)
+		if !g.C[x] {
+			g.C[x] = true
+			i++
+		} else {
+			continue
+		}
+	}
+}
+
+func (g *Gun) Fire() bool {
+	if g.C[g.N] {
+		g.C[g.N] = false
+		g.N++
+		return true
+	}
+
+	g.N++
+	return false
+}
+
+func (g *Gun) IsEmpty() bool {
+	for _, v := range g.C {
+		if v {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (h *Handlers) Roulette(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	if gun.IsEmpty() {
+		gun.Load(Bullets)
+		log.Debugf("reloading gun: %+v\n", gun)
+	}
+
+	log.Debugf("firing gun: %+v\n", gun)
+	if gun.Fire() {
+		s.ChannelMessageSend(m.ChannelID, GunFireMessage)
+	} else {
+		s.ChannelMessageSend(m.ChannelID, GunClickMessage)
+	}
+	return nil
+}

command/rps.go

@@ -0,0 +1,34 @@
+package command
+
+import (
+	"strings"
+
+	"git.kill0.net/chill9/beepboop/lib/rps"
+	"github.com/bwmarrin/discordgo"
+)
+
+func (h *Handlers) Rps(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	if len(args) != 1 {
+		s.ChannelMessageSend(
+			m.ChannelID, "help: `!rps (rock | paper | scissors)`",
+		)
+		return nil
+	}
+
+	pc := strings.ToLower(args[0]) // player's choice
+
+	g := rps.NewGame(rps.RulesRps, rps.EmojiMapRps)
+
+	bc := g.Rand() // bot's choice
+
+	out, err := g.Play(bc, pc)
+	if _, ok := err.(rps.InvalidChoiceError); ok {
+		s.ChannelMessageSend(
+			m.ChannelID, "help: `!rps (rock | paper | scissors)`",
+		)
+	}
+
+	s.ChannelMessageSend(m.ChannelID, out)
+
+	return nil
+}

command/rpsls.go

@@ -0,0 +1,34 @@
+package command
+
+import (
+	"strings"
+
+	"git.kill0.net/chill9/beepboop/lib/rps"
+	"github.com/bwmarrin/discordgo"
+)
+
+func (h *Handlers) Rpsls(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	if len(args) != 1 {
+		s.ChannelMessageSend(
+			m.ChannelID, "help: `!rps (rock | paper | scissors | lizard | spock)`",
+		)
+		return nil
+	}
+
+	pc := strings.ToLower(args[0]) // player's choice
+
+	g := rps.NewGame(rps.RulesRpsls, rps.EmojiMapRpsls)
+
+	bc := g.Rand() // bot's choice
+
+	out, err := g.Play(bc, pc)
+	if _, ok := err.(rps.InvalidChoiceError); ok {
+		s.ChannelMessageSend(
+			m.ChannelID, "help: `!rps (rock | paper | scissors | lizard | spock)`",
+		)
+	}
+
+	s.ChannelMessageSend(m.ChannelID, out)
+
+	return nil
+}

command/time.go

@@ -2,58 +2,27 @@ package command
 
 import (
 	"fmt"
-	"strings"
 	"time"
 
-	"git.kill0.net/chill9/beepboop/bot"
 	"github.com/bwmarrin/discordgo"
 	log "github.com/sirupsen/logrus"
 )
 
-type (
-	TimeHandler struct {
-		config bot.Config
-	}
-)
-
-func NewTimeHandler() *TimeHandler {
-	return new(TimeHandler)
-}
-
-func (h *TimeHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *TimeHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+func (h *Handlers) Time(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
 	var (
 		t  time.Time
 		tz string
 	)
 
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !strings.HasPrefix(m.Content, "!time") {
-		return
-	}
-
-	x := strings.SplitN(m.Content, " ", 2)
-
-	if len(x) > 2 {
-		s.ChannelMessageSend(m.ChannelID, "help: `!time TIMEZONE`")
-		return
-	}
-
 	now := time.Now()
 
-	if len(x) == 2 {
-		tz = x[1]
+	if len(args) == 1 {
+		tz = args[0]
 		loc, err := time.LoadLocation(tz)
 		if err != nil {
 			log.Warnf("failed to load location: %s", err)
 			s.ChannelMessageSend(m.ChannelID, err.Error())
-			return
+			return nil
 		}
 		t = now.In(loc)
 	} else {
@@ -61,4 +30,5 @@ func (h *TimeHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
 	}
 
 	s.ChannelMessageSend(m.ChannelID, fmt.Sprint(t))
+	return nil
 }

command/util.go

@@ -1,63 +0,0 @@
-package command
-
-import (
-	"math/rand"
-	"net/url"
-	"path"
-	"strconv"
-	"strings"
-)
-
-func RandInt(min int, max int) int {
-	return rand.Intn(max-min+1) + min
-}
-
-func JoinInt(a []int, sep string) string {
-	var b []string
-
-	b = make([]string, len(a))
-
-	for i, v := range a {
-		b[i] = strconv.Itoa(v)
-	}
-
-	return strings.Join(b, sep)
-}
-
-func SumInt(a []int) int {
-	var sum int
-	for _, v := range a {
-		sum += v
-	}
-	return sum
-}
-
-func Itob(v int) bool {
-	if v == 1 {
-		return true
-	}
-
-	return false
-}
-
-func BuildURI(rawuri, rawpath string) string {
-	u, _ := url.Parse(rawuri)
-	u.Path = path.Join(u.Path, rawpath)
-	return u.String()
-}
-
-func HasCommand(s, prefix, cmd string) bool {
-	if len(s) < 2 {
-		return false
-	}
-
-	if string(s[0]) != prefix {
-		return false
-	}
-
-	if s[1:] == cmd {
-		return true
-	}
-
-	return false
-}

command/version.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"runtime"
 
-	"git.kill0.net/chill9/beepboop/bot"
 	"github.com/bwmarrin/discordgo"
 )
 
@@ -12,32 +11,7 @@ const (
 	SourceURI = "https://git.kill0.net/chill9/bb"
 )
 
-type (
-	VersionHandler struct {
-		config bot.Config
-		Name   string
-	}
-)
-
-func NewVersionHandler(s string) *VersionHandler {
-	h := new(VersionHandler)
-	h.Name = s
-	return h
-}
-
-func (h *VersionHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *VersionHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !HasCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
+func (h *Handlers) Version(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
 	s.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
 		"go version: %s\nplatform: %s\nos: %s\nsource: %s\n",
 		runtime.Version(),
@@ -45,4 +19,5 @@ func (h *VersionHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate
 		runtime.GOOS,
 		SourceURI,
 	))
+	return nil
 }

command/weather.go

@@ -0,0 +1,54 @@
+package command
+
+import (
+	"fmt"
+
+	"git.kill0.net/chill9/beepboop/lib/weather"
+
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+)
+
+func (h *Handlers) Weather(args []string, s *discordgo.Session, m *discordgo.MessageCreate) error {
+	var (
+		err error
+		loc string
+		w   weather.Weather
+	)
+
+	if len(args) != 1 {
+		s.ChannelMessageSend(m.ChannelID, "help: `!weather <CITY>,<STATE>,<COUNTRY>`")
+		return nil
+	}
+
+	loc = args[0]
+
+	if h.config.OpenWeatherMapToken == "" {
+		log.Error("OpenWeather token is not set")
+		return nil
+	}
+
+	wc := weather.NewClient(h.config.OpenWeatherMapToken)
+
+	log.Debugf("weather requested for '%s'", loc)
+
+	w, err = wc.Get(loc)
+	if err != nil {
+		log.Errorf("weather client error: %v", err)
+		return nil
+	}
+
+	log.Debugf("weather returned for '%s': %+v", loc, w)
+
+	s.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
+		"%s (%.1f, %.1f) — C:%.1f F:%.1f K:%.1f",
+		loc,
+		w.Coord.Lat,
+		w.Coord.Lon,
+		w.Main.Temp.Celcius(),
+		w.Main.Temp.Fahrenheit(),
+		w.Main.Temp.Kelvin(),
+	))
+
+	return nil
+}

config/config.go

@@ -0,0 +1,58 @@
+package config
+
+const (
+	defaultPrefix = "!"
+)
+
+var (
+	defaultReactions []string = []string{
+		"👍", "🌶️", "🤣", "😂", "🍆", "🍑", "❤️", "💦", "😍", "💩",
+		"🔥", "🍒", "🎉", "🥳", "🎊", "📉", "📈", "💀", "☠️",
+	}
+)
+
+type (
+	Config struct {
+		Debug               bool           `mapstructure:"debug"`
+		Handler             HandlerConfig  `mapstructure:"handler"`
+		Prefix              string         `mapstructure:"prefix"`
+		DiscordToken        string         `mapstructure:"discord_token"`
+		OpenWeatherMapToken string         `mapstructure:"open_weather_map_token"`
+		Mongo               MongoConfig    `mapstructure:"mongo"`
+		Redis               RedisConfig    `mapstructure:"redis"`
+		Postgres            PostgresConfig `mapstructure:"postgres"`
+	}
+
+	HandlerConfig struct {
+		Reaction ReactionConfig `mapstructure:"reaction"`
+	}
+
+	ReactionConfig struct {
+		Emojis   []string
+		Channels []string
+	}
+
+	MongoConfig struct {
+		Uri      string `mapstructure:"uri"`
+		Database string `mapstructure:"database"`
+	}
+
+	RedisConfig struct {
+		Addr     string `mapstructure:"addr"`
+		Password string `mapstructure:"password"`
+		DB       int    `mapstructure:"database"`
+	}
+
+	PostgresConfig struct {
+		Uri string `mapstructure:"uri"`
+	}
+)
+
+func NewConfig() *Config {
+	var c *Config = &Config{}
+
+	c.Prefix = defaultPrefix
+	c.Handler.Reaction.Emojis = defaultReactions
+
+	return c
+}

docker-compose.yaml

@@ -1,3 +1,4 @@
+---
 version: "3.9"
 services:
   bot:
@@ -5,3 +6,6 @@ services:
     environment:
       - BEEPBOOP_DISCORD_TOKEN
       - BEEPBOOP_OPEN_WEATHER_MAP_TOKEN
+      - BEEPBOOP_DEBUG=true
+    volumes:
+      - ./config.toml:/config.toml

go.mod

@@ -3,29 +3,28 @@ module git.kill0.net/chill9/beepboop
 go 1.18
 
 require (
-	github.com/bwmarrin/discordgo v0.25.0
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+	github.com/bwmarrin/discordgo v0.26.1
 	github.com/sirupsen/logrus v1.9.0
-	github.com/spf13/viper v1.12.0
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.13.0
 )
 
 require (
 	github.com/fsnotify/fsnotify v1.5.4 // indirect
-	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/magiconair/properties v1.8.6 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
-	github.com/spf13/afero v1.8.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.5 // indirect
+	github.com/spf13/afero v1.9.2 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.3.0 // indirect
-	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
-	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+	github.com/subosito/gotenv v1.4.1 // indirect
+	golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90 // indirect
+	golang.org/x/sys v0.0.0-20220907062415-87db552b00fd // indirect
 	golang.org/x/text v0.3.7 // indirect
-	gopkg.in/ini.v1 v1.66.4 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -38,8 +38,8 @@ cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3f
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/bwmarrin/discordgo v0.25.0 h1:NXhdfHRNxtwso6FPdzW2i3uBvvU7UIQTghmV2T4nqAs=
-github.com/bwmarrin/discordgo v0.25.0/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
+github.com/bwmarrin/discordgo v0.26.1 h1:AIrM+g3cl+iYBr4yBxCBp9tD9jR3K7upEjl0d89FRkE=
+github.com/bwmarrin/discordgo v0.26.1/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
@@ -49,6 +49,7 @@ github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGX
 github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -56,12 +57,12 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5ynNVH9qI8YYLbd1fK2po=
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@@ -98,6 +99,7 @@ github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -116,8 +118,9 @@ github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
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@@ -129,41 +132,48 @@ github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/X
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@@ -179,11 +189,10 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
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@@ -294,7 +303,6 @@ golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -303,10 +311,9 @@ golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -459,16 +466,17 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
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+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/ini.v1 v1.66.4 h1:SsAcf+mM7mRZo2nJNGt8mZCjG8ZRaNGMURJw7BsIST4=
-gopkg.in/ini.v1 v1.66.4/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
+gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
-gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

handler/handlers.go

@@ -0,0 +1,15 @@
+package handler
+
+import (
+	"git.kill0.net/chill9/beepboop/config"
+)
+
+type Handlers struct {
+	config *config.Config
+}
+
+func NewHandlers(config *config.Config) *Handlers {
+	return &Handlers{
+		config: config,
+	}
+}

handler/reaction.go

@@ -4,29 +4,13 @@ import (
 	"math/rand"
 	"strings"
 
-	"git.kill0.net/chill9/beepboop/bot"
-	"git.kill0.net/chill9/beepboop/command"
 	"git.kill0.net/chill9/beepboop/lib"
 
 	"github.com/bwmarrin/discordgo"
 	log "github.com/sirupsen/logrus"
 )
 
-type (
-	ReactionHandler struct {
-		config bot.Config
-	}
-)
-
-func NewReactionHandler() *ReactionHandler {
-	return new(ReactionHandler)
-}
-
-func (h *ReactionHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *ReactionHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+func (h *Handlers) Reaction(s *discordgo.Session, m *discordgo.MessageCreate) {
 	if m.Author.ID == s.State.User.ID {
 		return
 	}
@@ -50,7 +34,7 @@ func (h *ReactionHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreat
 
 	for _, a := range m.Attachments {
 		if strings.HasPrefix(a.ContentType, "image/") {
-			for i := 1; i <= command.RandInt(1, len(emojis)); i++ {
+			for i := 1; i <= lib.RandInt(1, len(emojis)); i++ {
 				r := emojis[rand.Intn(len(emojis))]
 				s.MessageReactionAdd(m.ChannelID, m.ID, r)
 			}
@@ -58,7 +42,7 @@ func (h *ReactionHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreat
 	}
 
 	for range m.Embeds {
-		for i := 1; i <= command.RandInt(1, len(emojis)); i++ {
+		for i := 1; i <= lib.RandInt(1, len(emojis)); i++ {
 			r := emojis[rand.Intn(len(emojis))]
 			s.MessageReactionAdd(m.ChannelID, m.ID, r)
 		}

lib/common.go

@@ -1,5 +1,12 @@
 package lib
 
+import (
+	"net/url"
+	"path"
+	"strconv"
+	"strings"
+)
+
 func Contains[T comparable](s []T, v T) bool {
 	for _, x := range s {
 		if x == v {
@@ -8,3 +15,147 @@ func Contains[T comparable](s []T, v T) bool {
 	}
 	return false
 }
+
+func JoinInt(a []int, sep string) string {
+	b := make([]string, len(a))
+
+	for i, v := range a {
+		b[i] = strconv.Itoa(v)
+	}
+
+	return strings.Join(b, sep)
+}
+
+func SumInt(a []int) int {
+	var sum int
+	for _, v := range a {
+		sum += v
+	}
+	return sum
+}
+
+func Itob(v int) bool {
+	return v == 1
+}
+
+func BuildURI(rawuri, rawpath string) string {
+	u, _ := url.Parse(rawuri)
+	u.Path = path.Join(u.Path, rawpath)
+	return u.String()
+}
+
+func HasCommand(s, prefix string) bool {
+	s = strings.TrimSpace(s)
+
+	if len(s) == 0 || len(prefix) == 0 {
+		return false
+	}
+
+	if !strings.HasPrefix(s, prefix) {
+		return false
+	}
+
+	// remove the command prefix
+	s = s[len(prefix):]
+
+	// multiple assignment trick
+	cmd, _ := func() (string, string) {
+		x := strings.SplitN(s, " ", 2)
+		if len(x) > 1 {
+			return x[0], x[1]
+		}
+
+		return x[0], ""
+	}()
+
+	return len(cmd) > 0
+}
+
+func ContainsCommand(s, prefix, cmd string) bool {
+	s = strings.TrimSpace(s)
+
+	args := strings.Split(s, " ")
+	s = args[0]
+
+	// a command cannot be less than two characters e.g. !x
+	if len(s) < 2 {
+		return false
+	}
+
+	if string(s[0]) != prefix {
+		return false
+	}
+
+	if strings.HasPrefix(s[1:], cmd) {
+		return true
+	}
+
+	return false
+}
+
+func SplitCommandAndArg(s, prefix string) (cmd string, arg string) {
+	s = strings.TrimSpace(s)
+
+	if !strings.HasPrefix(s, prefix) {
+		return
+	}
+
+	// remove the command prefix
+	s = s[len(prefix):]
+
+	// multiple assignment trick
+	cmd, arg = func() (string, string) {
+		x := strings.SplitN(s, " ", 2)
+		if len(x) > 1 {
+			return x[0], x[1]
+		}
+		return x[0], ""
+	}()
+
+	return cmd, arg
+}
+
+func SplitCommandAndArgs(s, prefix string, n int) (cmd string, args []string) {
+	cmd, arg := SplitCommandAndArg(s, prefix)
+
+	if arg == "" {
+		return cmd, []string{}
+	}
+
+	if n == 0 {
+		return cmd, strings.Split(arg, " ")
+	}
+
+	return cmd, strings.SplitN(arg, " ", n)
+}
+
+func SplitArgs(s string, n int) (args []string) {
+	if s == "" {
+		return []string{}
+	}
+
+	if n > 0 {
+		args = strings.SplitN(s, " ", n)
+	} else {
+		args = strings.Split(s, " ")
+	}
+	return
+}
+
+func MapKeys[K comparable, V any](m map[K]V) []K {
+	keys := make([]K, 0, len(m))
+	for k := range m {
+		keys = append(keys, k)
+	}
+	return keys
+}
+
+func MapKey[K comparable, V comparable](m map[K]V, v V) K {
+	var r K
+	for k := range m {
+		if m[k] == v {
+			return k
+		}
+	}
+	return r
+}

lib/common_test.go

@@ -0,0 +1,159 @@
+package lib
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestContainsCommand(t *testing.T) {
+	tables := []struct {
+		s      string
+		prefix string
+		cmd    string
+		r      bool
+	}{
+		{"!command x y", "!", "command", true},
+		{"#command x y", "#", "command", true},
+		{"command x y", "!", "comamnd", false},
+		{"", "", "", false},
+		{"!", "!", "", false},
+		{"! x y", "!", "", false},
+	}
+
+	for _, table := range tables {
+		r := ContainsCommand(table.s, table.prefix, table.cmd)
+		if r != table.r {
+			t.Errorf("ContainsCommand(%q, %q, %q), got: %t, want: %t",
+				table.s, table.prefix, table.cmd, r, table.r,
+			)
+		}
+	}
+}
+
+func TestHasCommandCommand(t *testing.T) {
+	tables := []struct {
+		s      string
+		prefix string
+		want   bool
+	}{
+		{"!command", "!", true},
+		{"!command x y", "!", true},
+		{"!c x y", "!", true},
+		{"! x y", "!", false},
+		{"hey guy", "!", false},
+		{"hey", "!", false},
+		{"hey", "", false},
+		{"", "!", false},
+		{"", "", false},
+	}
+
+	for _, table := range tables {
+		if got, want := HasCommand(table.s, table.prefix), table.want; got != want {
+			t.Errorf(
+				"s: %s, prefix: %s, got: %t, want: %t",
+				table.s, table.prefix, got, want,
+			)
+		}
+	}
+}
+
+func TestSplitCommandAndArg(t *testing.T) {
+	tables := []struct {
+		s       string
+		prefix  string
+		wantCmd string
+		wantArg string
+	}{
+		{"!command x y", "!", "command", "x y"},
+		{"!command", "!", "command", ""},
+		{"hey man", "!", "", ""},
+	}
+
+	for _, table := range tables {
+		gotCmd, gotArg := SplitCommandAndArg(table.s, table.prefix)
+		if gotCmd != table.wantCmd {
+			t.Errorf("got: %s, want: %s", gotCmd, table.wantCmd)
+		}
+		if gotArg != table.wantArg {
+			t.Errorf("got: %+v, want: %+v", gotArg, table.wantArg)
+		}
+	}
+}
+
+func TestSplitCommandAndArgs(t *testing.T) {
+	tables := []struct {
+		s        string
+		prefix   string
+		n        int
+		wantCmd  string
+		wantArgs []string
+	}{
+		{"!command x y", "!", 2, "command", []string{"x", "y"}},
+		{"!command x y z", "!", 2, "command", []string{"x", "y z"}},
+		{"!command", "!", 1, "command", []string{}},
+		{"hey man", "!", 1, "", []string{}},
+	}
+	for _, table := range tables {
+		gotCmd, gotArgs := SplitCommandAndArgs(table.s, table.prefix, table.n)
+		if gotCmd != table.wantCmd {
+			t.Errorf("got: %s, want: %s", gotCmd, table.wantCmd)
+		}
+		if !reflect.DeepEqual(gotArgs, table.wantArgs) {
+			t.Errorf("got: %#v, want: %#v", gotArgs, table.wantArgs)
+		}
+	}
+}
+
+func TestSplitArgs(t *testing.T) {
+	tables := []struct {
+		s    string
+		n    int
+		want []string
+	}{
+		{"a b c", 0, []string{"a", "b", "c"}},
+		{"a b c", 1, []string{"a b c"}},
+		{"a b c", 2, []string{"a", "b c"}},
+		{"a b c", 3, []string{"a", "b", "c"}},
+		{"a b c", 4, []string{"a", "b", "c"}},
+		{"", 0, []string{}},
+	}
+	for _, table := range tables {
+		if got, want := SplitArgs(table.s, table.n), table.want; !reflect.DeepEqual(got, want) {
+			t.Errorf("got: %#v, want: %#v", got, want)
+		}
+	}
+}
+
+func TestMapKeys(t *testing.T) {
+	tables := []struct {
+		m    map[string]int
+		want []string
+	}{
+		{map[string]int{"a": 0, "b": 1, "c": 3}, []string{"a", "b", "c"}},
+	}
+
+	for _, table := range tables {
+		if got, want := MapKeys(table.m), table.want; !reflect.DeepEqual(got, want) {
+			t.Errorf("got: %#v, want: %#v", got, want)
+		}
+	}
+}
+
+func TestMapKey(t *testing.T) {
+	tables := []struct {
+		m    map[string]int
+		n    int
+		want string
+	}{
+		{map[string]int{"a": 0, "b": 1, "c": 2}, 0, "a"},
+		{map[string]int{"a": 0, "b": 1, "c": 2}, 1, "b"},
+		{map[string]int{"a": 0, "b": 1, "c": 2}, 2, "c"},
+		{map[string]int{"a": 0, "b": 1, "c": 2, "d": 0}, 0, "a"},
+	}
+
+	for _, table := range tables {
+		if got, want := MapKey(table.m, table.n), table.want; got != want {
+			t.Errorf("got: %#v, want: %#v", got, want)
+		}
+	}
+}

lib/rand.go

@@ -33,3 +33,25 @@ func SeedMathRand() error {
 
 	return err
 }
+
+func RandInt(min int, max int) int {
+	return rand.Intn(max-min+1) + min
+}
+
+func MapRand[K comparable, V any](m map[K]V) V {
+	n := rand.Intn(len(m))
+	i := 0
+	for _, v := range m {
+		if i == n {
+			return v
+		}
+		i++
+	}
+	panic("unreachable")
+}
+
+func MapRandKey[K comparable, V any](m map[K]V) K {
+	keys := MapKeys(m)
+	n := rand.Intn(len(m))
+	return keys[n]
+}

lib/rps/rps.go

@@ -0,0 +1,118 @@
+package rps
+
+import (
+	"fmt"
+	"strings"
+
+	"git.kill0.net/chill9/beepboop/lib"
+)
+
+type (
+	Game struct {
+		rules    [][]string
+		emojiMap map[string]string
+	}
+)
+
+type InvalidChoiceError struct {
+	s string
+}
+
+func (e InvalidChoiceError) Error() string {
+	return fmt.Sprintf("%q is an invalid choice", e.s)
+}
+
+var (
+	RulesRps [][]string = [][]string{
+		{"rock", "scissors", "crushes"},
+		{"paper", "rock", "covers"},
+		{"scissors", "paper", "cuts"},
+	}
+
+	EmojiMapRps map[string]string = map[string]string{
+		"rock":     "🪨️",
+		"paper":    "📝",
+		"scissors": "✂️",
+	}
+
+	RulesRpsls [][]string = [][]string{
+		{"rock", "scissors", "crushes"},
+		{"rock", "lizard", "crushes"},
+		{"paper", "rock", "covers"},
+		{"paper", "spock", "disproves"},
+		{"scissors", "paper", "cuts"},
+		{"scissors", "lizard", "decapitates"},
+		{"lizard", "paper", "eats"},
+		{"lizard", "spock", "poisons"},
+		{"spock", "scissors", "smashes"},
+		{"spock", "rock", "vaporizes"},
+	}
+
+	EmojiMapRpsls map[string]string = map[string]string{
+		"rock":     "🪨️",
+		"paper":    "📝",
+		"scissors": "✂️",
+		"lizard":   "🦎",
+		"spock":    "🖖",
+	}
+)
+
+func NewGame(rules [][]string, emojiMap map[string]string) *Game {
+	return &Game{rules: rules, emojiMap: emojiMap}
+}
+
+func (g *Game) Rand() string {
+	return lib.MapRandKey(g.emojiMap)
+}
+
+func (g *Game) Play(c1, c2 string) (string, error) {
+	var b strings.Builder
+
+	if !g.Valid(c1) {
+		return "", InvalidChoiceError{s: c1}
+	}
+	if !g.Valid(c2) {
+		return "", InvalidChoiceError{s: c2}
+	}
+
+	fmt.Fprintf(&b, "%s v %s: ", g.emojiMap[c1], g.emojiMap[c2])
+
+	for _, rule := range g.rules {
+		verb := rule[2]
+
+		if c1 == c2 {
+			fmt.Fprintf(&b, "draw")
+			return b.String(), nil
+		}
+
+		if c1 == rule[0] && c2 == rule[1] {
+			fmt.Fprintf(&b, "%s %s %s", c1, verb, c2)
+			return b.String(), nil
+		} else if c2 == rule[0] && c1 == rule[1] {
+			fmt.Fprintf(&b, "%s %s %s", c2, verb, c1)
+			return b.String(), nil
+		}
+	}
+
+	return b.String(), nil
+}
+
+func (g *Game) Valid(c string) bool {
+	_, ok := g.emojiMap[c]
+	return ok
+}
+
+func Play(rules [][]string, c1, c2 string) string {
+	for _, rule := range rules {
+		if c1 == c2 {
+			return "draw"
+		}
+
+		if c1 == rule[0] && c2 == rule[1] {
+			return fmt.Sprintf("%s %s %s", c1, rule[2], c2)
+		} else if c2 == rule[0] && c1 == rule[1] {
+			return fmt.Sprintf("%s %s %s", c2, rule[2], c1)
+		}
+	}
+	return ""
+}

lib/weather/structs.go

@@ -0,0 +1,48 @@
+package weather
+
+type (
+	Temperature float32
+
+	Weather struct {
+		Main struct {
+			Temp      Temperature `json:"temp"`
+			FeelsLike Temperature `json:"feels_like"`
+			TempMin   Temperature `json:"temp_min"`
+			TempMax   Temperature `json:"temp_max"`
+			Pressure  float32     `json:"pressure"`
+			Humidity  float32     `json:"humidity"`
+		} `json:"main"`
+
+		Coord struct {
+			Lon float32 `json:"lon"`
+			Lat float32 `json:"lat"`
+		} `json:"coord"`
+
+		Rain struct {
+			H1 float32 `json:"1h"`
+			H3 float32 `json:"3h"`
+		} `json:"rain"`
+
+		Weather []struct {
+			Main        string `json:"main"`
+			Description string `json:"description"`
+			Icon        string `json:"icon"`
+		} `json:"weather"`
+	}
+
+	WeatherError struct {
+		Message string `json:"message"`
+	}
+)
+
+func (t *Temperature) Kelvin() float32 {
+	return float32(*t)
+}
+
+func (t *Temperature) Fahrenheit() float32 {
+	return ((float32(*t) - 273.15) * (9.0 / 5)) + 32
+}
+
+func (t *Temperature) Celcius() float32 {
+	return float32(*t) - 273.15
+}

lib/weather/weather.go

@@ -0,0 +1,84 @@
+package weather
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"git.kill0.net/chill9/beepboop/lib"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type (
+	WeatherClient struct {
+		token string
+	}
+)
+
+const (
+	OpenWeatherMapURI = "https://api.openweathermap.org"
+)
+
+var (
+	EndpointWeather        = lib.BuildURI(OpenWeatherMapURI, "/data/2.5/weather")
+	ErrUnmarshal           = errors.New("unmarshaling JSON failed")
+	ErrReadingResponse     = errors.New("reading HTTP response failed")
+	ErrRequestFailed       = errors.New("HTTP request failed")
+	ErrCreateRequestFailed = errors.New("failed to create new HTTP request")
+)
+
+func NewClient(token string) *WeatherClient {
+	return &WeatherClient{token}
+}
+
+func (c *WeatherClient) Get(loc string) (w Weather, err error) {
+	var werr WeatherError
+
+	req, err := http.NewRequest("GET", EndpointWeather, nil)
+	if err != nil {
+		err = fmt.Errorf("%s: %s", ErrCreateRequestFailed, err)
+		return
+	}
+
+	q := req.URL.Query()
+	q.Add("q", loc)
+	q.Add("appid", c.token)
+	req.URL.RawQuery = q.Encode()
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		err = fmt.Errorf("%s: %s", ErrRequestFailed, err)
+		return
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		err = fmt.Errorf("%s: %s", ErrReadingResponse, err)
+		return
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		err = json.Unmarshal(body, &werr)
+		if err != nil {
+			log.Debugf("%s", body)
+			err = fmt.Errorf("%s: %s", ErrUnmarshal, err)
+			return
+		}
+
+		err = fmt.Errorf("error: (%s) %s", resp.Status, werr.Message)
+		return
+	}
+
+	err = json.Unmarshal(body, &w)
+	if err != nil {
+		log.Debugf("%s", body)
+		err = fmt.Errorf("%s: %s", ErrUnmarshal, err)
+		return
+	}
+
+	return
+}