Merge pull request 'Add a command router' (#2) from add-command-router into develop

Reviewed-on: chill9/bb#2

bot/command.go

@@ -0,0 +1,87 @@
+package bot
+
+import (
+	"fmt"
+
+	"git.kill0.net/chill9/beepboop/lib"
+	"github.com/bwmarrin/discordgo"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	DefaultCommander *Commander
+)
+
+type (
+	Commander struct {
+		commands map[string]*Command
+	}
+
+	Command struct {
+		Name    string
+		Config  Config
+		Func    func(cmd *Command, args []string) error
+		Session *discordgo.Session
+		Message *discordgo.MessageCreate
+	}
+)
+
+func init() {
+	DefaultCommander = NewCommander()
+}
+
+func NewCommander() *Commander {
+	cmdr := new(Commander)
+	cmdr.commands = make(map[string]*Command)
+	return cmdr
+}
+
+func (cmdr *Commander) AddCommand(cmd *Command) {
+	cmdr.commands[cmd.Name] = cmd
+}
+
+func (cmdr *Commander) GetCommand(name string) (*Command, bool) {
+	cmd, ok := cmdr.commands[name]
+	return cmd, ok
+}
+
+func AddCommand(cmd *Command) {
+	DefaultCommander.AddCommand(cmd)
+}
+
+func GetCommand(name string) (*Command, bool) {
+	cmd, ok := DefaultCommander.GetCommand(name)
+	return cmd, ok
+}
+
+func NewCommandHandler(config Config) func(s *discordgo.Session, m *discordgo.MessageCreate) {
+	return func(s *discordgo.Session, m *discordgo.MessageCreate) {
+		var cmd *Command
+
+		if m.Author.ID == s.State.User.ID {
+			return
+		}
+
+		if !lib.HasCommand(m.Content, config.Prefix) {
+			return
+		}
+
+		cmdName, args := lib.SplitCommandAndArgs(m.Content, config.Prefix)
+
+		cmd, ok := GetCommand(cmdName)
+		if ok {
+			cmd.Config = config
+			cmd.Name = cmdName
+			cmd.Session = s
+			cmd.Message = m
+
+			log.Debugf("command: %+v, args: %+v", cmd.Name, args)
+			cmd.Func(cmd, args)
+
+			return
+		}
+
+		log.Warnf("unknown command: %+v, args: %+v", cmdName, args)
+		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("unknown command: %s", cmdName))
+	}
+}

bot/commands/coin.go

@@ -0,0 +1,29 @@
+package commands
+
+import (
+	"git.kill0.net/chill9/beepboop/bot"
+	"git.kill0.net/chill9/beepboop/lib"
+)
+
+type Coin bool
+
+func (c *Coin) Flip() bool {
+	*c = Coin(lib.Itob(lib.RandInt(0, 1)))
+	return bool(*c)
+}
+
+func CoinCommand(cmd *bot.Command, args []string) error {
+	var (
+		c   Coin
+		msg string
+	)
+
+	if c.Flip() {
+		msg = "heads"
+	} else {
+		msg = "tails"
+	}
+
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, msg)
+	return nil
+}

bot/commands/deal.go

@@ -1,4 +1,4 @@
-package handler
+package commands
 
 import (
 	"errors"
@@ -8,8 +8,6 @@ import (
 	"strings"
 
 	"git.kill0.net/chill9/beepboop/bot"
-	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -52,36 +50,16 @@ func (d *Deck) Deal(n int) ([]Card, error) {
 	return hand, err
 }
 
-func NewDealHandler(s string) *DealHandler {
-	h := new(DealHandler)
-	h.Name = s
-	return h
-}
-
-func (h *DealHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *DealHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !lib.ContainsCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
+func DealCommand(cmd *bot.Command, args []string) error {
 	rand.Shuffle(len(deck), func(i, j int) {
 		deck[i], deck[j] = deck[j], deck[i]
 	})
 
 	log.Debugf("%+v", deck)
 
-	_, args := lib.SplitCommandAndArgs(m.Content, h.config.Prefix)
-
 	if len(args) != 1 {
-		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("help: `!%s <n>`", h.Name))
-		return
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, fmt.Sprintf("help: `!%s <n>`", cmd.Name))
+		return nil
 	}
 
 	n, err := strconv.Atoi(args[0])
@@ -91,11 +69,12 @@ func (h *DealHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
 
 	hand, err := deck.Deal(n)
 	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("error: %s\n", err))
-		return
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, fmt.Sprintf("error: %s\n", err))
+		return nil
 	}
 
-	s.ChannelMessageSend(m.ChannelID, JoinCards(hand, " "))
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, JoinCards(hand, " "))
+	return nil
 }
 
 func JoinCards(h []Card, sep string) string {

bot/commands/dice.go

@@ -1,4 +1,4 @@
-package handler
+package commands
 
 import (
 	"errors"
@@ -9,7 +9,6 @@ import (
 
 	"git.kill0.net/chill9/beepboop/bot"
 	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -25,11 +24,6 @@ type (
 		Rolls     []int
 		S         string
 	}
-
-	RollHandler struct {
-		config bot.Config
-		Name   string
-	}
 )
 
 func NewRoll(n, d int) *Roll {
@@ -84,42 +78,19 @@ func (r *Roll) RollDice() {
 	}
 }
 
-func NewRollHandler(s string) *RollHandler {
-	return &RollHandler{Name: s}
-}
-
-func (h *RollHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *RollHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+func RollCommand(cmd *bot.Command, args []string) error {
 	var (
 		err       error
 		msg, roll string
 		r         *Roll
 	)
 
-	if m.Author.ID == s.State.User.ID {
-		return
-	}
-
-	if !lib.ContainsCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
-	x := strings.Split(m.Content, " ")
-
-	if len(x) != 2 {
-		s.ChannelMessageSend(m.ChannelID, "help: `!roll <n>d<s>`")
-		return
-	}
-
-	roll = x[1]
+	roll = args[0]
 
 	r, err = ParseRoll(roll)
 	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
-		return
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, err.Error())
+		return nil
 	}
 
 	r.RollDice()
@@ -127,5 +98,6 @@ func (h *RollHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
 
 	msg = fmt.Sprintf("🎲 %s = %d", lib.JoinInt(r.Rolls, " + "), r.Sum)
 
-	s.ChannelMessageSend(m.ChannelID, msg)
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, msg)
+	return nil
 }

bot/commands/ping.go

@@ -0,0 +1,10 @@
+package commands
+
+import (
+	"git.kill0.net/chill9/beepboop/bot"
+)
+
+func PingCommand(cmd *bot.Command, args []string) error {
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, "pong")
+	return nil
+}

bot/commands/roulette.go

@@ -1,11 +1,8 @@
-package handler
+package commands
 
 import (
-	"strings"
-
 	"git.kill0.net/chill9/beepboop/bot"
 	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -21,11 +18,6 @@ type (
 		C [6]bool
 		N int
 	}
-
-	RouletteHandler struct {
-		config bot.Config
-		Name   string
-	}
 )
 
 var (
@@ -74,23 +66,7 @@ func (g *Gun) IsEmpty() bool {
 	return true
 }
 
-func NewRouletteHandler(s string) *RouletteHandler {
-	return &RouletteHandler{Name: s}
-}
-
-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
-	}
-
+func RouletteCommand(cmd *bot.Command, args []string) error {
 	if gun.IsEmpty() {
 		gun.Load(Bullets)
 		log.Debugf("reloading gun: %+v\n", gun)
@@ -98,8 +74,9 @@ func (h *RouletteHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreat
 
 	log.Debugf("firing gun: %+v\n", gun)
 	if gun.Fire() {
-		s.ChannelMessageSend(m.ChannelID, GunFireMessage)
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, GunFireMessage)
 	} else {
-		s.ChannelMessageSend(m.ChannelID, GunClickMessage)
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, GunClickMessage)
 	}
+	return nil
 }

bot/commands/time.go

@@ -0,0 +1,34 @@
+package commands
+
+import (
+	"fmt"
+	"time"
+
+	"git.kill0.net/chill9/beepboop/bot"
+	log "github.com/sirupsen/logrus"
+)
+
+func TimeCommand(cmd *bot.Command, args []string) error {
+	var (
+		t  time.Time
+		tz string
+	)
+
+	now := time.Now()
+
+	if len(args) == 1 {
+		tz = args[0]
+		loc, err := time.LoadLocation(tz)
+		if err != nil {
+			log.Warnf("failed to load location: %s", err)
+			cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, err.Error())
+			return nil
+		}
+		t = now.In(loc)
+	} else {
+		t = now
+	}
+
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, fmt.Sprint(t))
+	return nil
+}

bot/commands/version.go

@@ -0,0 +1,23 @@
+package commands
+
+import (
+	"fmt"
+	"runtime"
+
+	"git.kill0.net/chill9/beepboop/bot"
+)
+
+const (
+	SourceURI = "https://git.kill0.net/chill9/bb"
+)
+
+func VersionCommand(cmd *bot.Command, args []string) error {
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, fmt.Sprintf(
+		"go version: %s\nplatform: %s\nos: %s\nsource: %s\n",
+		runtime.Version(),
+		runtime.GOARCH,
+		runtime.GOOS,
+		SourceURI,
+	))
+	return nil
+}

bot/commands/weather.go

@@ -1,12 +1,10 @@
-package handler
+package commands
 
 import (
 	"fmt"
-	"strings"
 
 	"git.kill0.net/chill9/beepboop/bot"
 	"git.kill0.net/chill9/beepboop/lib/weather"
-	"github.com/bwmarrin/discordgo"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -24,48 +22,38 @@ func (h *WeatherHandler) SetConfig(config bot.Config) {
 	h.Config = config
 }
 
-func (h *WeatherHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+func WeatherCommand(cmd *bot.Command, args []string) error {
 	var (
 		err error
 		loc string
 		w   weather.Weather
 	)
 
-	if m.Author.ID == s.State.User.ID {
-		return
+	if len(args) != 1 {
+		cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, "help: `!weather <CITY>,<STATE>,<COUNTRY>`")
+		return nil
 	}
 
-	if !strings.HasPrefix(m.Content, "!weather") {
-		return
-	}
+	loc = args[0]
 
-	x := strings.SplitN(m.Content, " ", 2)
-
-	if len(x) != 2 {
-		s.ChannelMessageSend(m.ChannelID, "help: `!weather <CITY>,<STATE>,<COUNTRY>`")
-		return
-	}
-
-	loc = x[1]
-
-	if h.Config.OpenWeatherMapToken == "" {
+	if cmd.Config.OpenWeatherMapToken == "" {
 		log.Error("OpenWeather token is not set")
-		return
+		return nil
 	}
 
-	wc := weather.NewClient(h.Config.OpenWeatherMapToken)
+	wc := weather.NewClient(cmd.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
+		return nil
 	}
 
 	log.Debugf("weather returned for '%s': %+v", loc, w)
 
-	s.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
+	cmd.Session.ChannelMessageSend(cmd.Message.ChannelID, fmt.Sprintf(
 		"%s (%.1f, %.1f) — C:%.1f F:%.1f K:%.1f",
 		loc,
 		w.Coord.Lat,
@@ -74,4 +62,6 @@ func (h *WeatherHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate
 		w.Main.Temp.Fahrenheit(),
 		w.Main.Temp.Kelvin(),
 	))
+
+	return nil
 }

bot/handler/coin.go

@@ -1,52 +0,0 @@
-package handler
-
-import (
-	"git.kill0.net/chill9/beepboop/bot"
-	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
-)
-
-type (
-	Coin bool
-
-	CoinHandler struct {
-		config bot.Config
-		Name   string
-	}
-)
-
-func (c *Coin) Flip() bool {
-	*c = Coin(lib.Itob(lib.RandInt(0, 1)))
-	return bool(*c)
-}
-
-func NewCoinHandler(s string) *CoinHandler {
-	return &CoinHandler{Name: s}
-}
-
-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 !lib.ContainsCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
-	if c.Flip() {
-		msg = "heads"
-	} else {
-		msg = "tails"
-	}
-
-	s.ChannelMessageSend(m.ChannelID, msg)
-}

bot/handler/ping.go

@@ -1,37 +0,0 @@
-package handler
-
-import (
-	"git.kill0.net/chill9/beepboop/bot"
-	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
-	log "github.com/sirupsen/logrus"
-)
-
-type (
-	PingHandler struct {
-		config bot.Config
-		Name   string
-	}
-)
-
-func NewPingHandler(s string) *PingHandler {
-	return &PingHandler{Name: s}
-}
-
-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 !lib.ContainsCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
-	log.Debug("received ping")
-
-	s.ChannelMessageSend(m.ChannelID, "pong")
-}

bot/handler/time.go

@@ -1,65 +0,0 @@
-package handler
-
-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
-		Name   string
-	}
-)
-
-func NewTimeHandler(s string) *TimeHandler {
-	return &TimeHandler{Name: s}
-}
-
-func (h *TimeHandler) SetConfig(config bot.Config) {
-	h.config = config
-}
-
-func (h *TimeHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
-	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]
-		loc, err := time.LoadLocation(tz)
-		if err != nil {
-			log.Warnf("failed to load location: %s", err)
-			s.ChannelMessageSend(m.ChannelID, err.Error())
-			return
-		}
-		t = now.In(loc)
-	} else {
-		t = now
-	}
-
-	s.ChannelMessageSend(m.ChannelID, fmt.Sprint(t))
-}

bot/handler/version.go

@@ -1,47 +0,0 @@
-package handler
-
-import (
-	"fmt"
-	"runtime"
-
-	"git.kill0.net/chill9/beepboop/bot"
-	"git.kill0.net/chill9/beepboop/lib"
-	"github.com/bwmarrin/discordgo"
-)
-
-const (
-	SourceURI = "https://git.kill0.net/chill9/bb"
-)
-
-type (
-	VersionHandler struct {
-		config bot.Config
-		Name   string
-	}
-)
-
-func NewVersionHandler(s string) *VersionHandler {
-	return &VersionHandler{Name: s}
-}
-
-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 !lib.ContainsCommand(m.Content, h.config.Prefix, h.Name) {
-		return
-	}
-
-	s.ChannelMessageSend(m.ChannelID, fmt.Sprintf(
-		"go version: %s\nplatform: %s\nos: %s\nsource: %s\n",
-		runtime.Version(),
-		runtime.GOARCH,
-		runtime.GOOS,
-		SourceURI,
-	))
-}

cmd/bb/main.go

@@ -11,6 +11,7 @@ import (
 	"syscall"
 
 	"git.kill0.net/chill9/beepboop/bot"
+	"git.kill0.net/chill9/beepboop/bot/commands"
 	"git.kill0.net/chill9/beepboop/bot/handler"
 	"git.kill0.net/chill9/beepboop/lib"
 
@@ -24,18 +25,41 @@ var (
 	C bot.Config
 
 	handlers []bot.MessageCreateHandler = []bot.MessageCreateHandler{
-		handler.NewCoinHandler("coin"),
-		handler.NewPingHandler("ping"),
-		handler.NewRollHandler("roll"),
-		handler.NewRouletteHandler("roulette"),
-		handler.NewTimeHandler("time"),
-		handler.NewVersionHandler("version"),
-		handler.NewWeatherHandler("weather"),
 		handler.NewReactionHandler(),
-		handler.NewDealHandler("deal"),
 	}
 )
 
+func init() {
+	bot.AddCommand(&bot.Command{
+		Name: "coin",
+		Func: commands.CoinCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "deal",
+		Func: commands.DealCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "ping",
+		Func: commands.PingCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "roll",
+		Func: commands.RollCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "time",
+		Func: commands.TimeCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "version",
+		Func: commands.VersionCommand,
+	})
+	bot.AddCommand(&bot.Command{
+		Name: "weather",
+		Func: commands.WeatherCommand,
+	})
+}
+
 func main() {
 	setupConfig()
 
@@ -55,6 +79,8 @@ func main() {
 		dg.AddHandler(h.Handle)
 	}
 
+	dg.AddHandler(bot.NewCommandHandler(C))
+
 	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsDirectMessages
 
 	err = dg.Open()