From 0345b1cba172760574c89f6a1cdd5e0718e92cf2 Mon Sep 17 00:00:00 2001
From: Ryan Cavicchioni <ryan@cavi.cc>
Date: Mon, 5 Sep 2022 16:55:07 -0500
Subject: [PATCH] Add a command router

This will only required one handler for all of the commands
---
 bot/command.go | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++
 cmd/bb/main.go |  2 ++
 2 files changed, 89 insertions(+)
 create mode 100644 bot/command.go

diff --git a/bot/command.go b/bot/command.go
new file mode 100644
index 0000000..92f796f
--- /dev/null
+++ b/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))
+	}
+}
diff --git a/cmd/bb/main.go b/cmd/bb/main.go
index 395cb02..8fbf3ba 100644
--- a/cmd/bb/main.go
+++ b/cmd/bb/main.go
@@ -55,6 +55,8 @@ func main() {
 		dg.AddHandler(h.Handle)
 	}
 
+	dg.AddHandler(bot.NewCommandHandler(C))
+
 	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsDirectMessages
 
 	err = dg.Open()