commands.go

package main

import "github.com/bwmarrin/discordgo"
import "strings"

type command struct {
	Name string
	Help string

	Exec func(*discordgo.Session, *discordgo.MessageCreate, []string)
}

var (
	commMap = make(map[string]command)
)

func prepareCommands() {
	command{
		Name: "git",
		Help: "Args: none\n\nLinks 2Bots github page.\n\nExample:\n`" + conf.Prefix + "git`",
		Exec: msgGit,
	}.add()
	command{
		Name: "emoji",
		Help: "Args: [emoji]\n\nSends a large image of the given emoji.\n\nExample:\n`" + conf.Prefix + ":smile:`",
		Exec: msgEmoji,
	}.add()
	command{
		Name: "setGame",
		Help: "Args: [game]\n\nSets your current game to 'game'",
		Exec: msgGame,
	}.add()
	command{
		Name: "findEmoji",
		Help: "Args: [emoji | name]\n\nReturns all the emojis that match the given emoji or emoji name in all the servers you are in",
		Exec: msgFindEmoji,
	}.add()
	command{
		Name: "image",
		Help: "Args: [save,recall,delete,list,status] [name]\n\nSave images and recall them at anytime! Everyone gets 8MB of image storage. Any name counts so long theres no `/` in it." +
			"Only you can 'recall' your saved images. There's a review process to make sure nothing illegal is being uploaded but we're fairly relaxed for the most part\n\n" +
			"Example:\n`!owo image save 2B Happy`\n2Bot downloads the image and sends it off for reviewing\n\n" +
			"`" + conf.Prefix + "image recall 2B Happy`\nIf your image was confirmed, 2Bot will send the image named `2B Happy`\n\n" +
			"`" + conf.Prefix + "image delete 2B Happy`\nThis will delete the image you saved called `2B Happy`\n\n" +
			"`" + conf.Prefix + "image list`\nThis will list your saved images along with a preview!\n\n" +
			"`" + conf.Prefix + "image status`\nShows some details on your saved images and quota",
		Exec: msgImageRecall,
	}.add()
	command{"help",
		"", msgHelp,
	}.add()
}

//Small wrapper function to reduce clutter
func l(s string) (r string) {
	return strings.ToLower(s)
}

func parseCommand(s *discordgo.Session, m *discordgo.MessageCreate, message string) {
	msglist := strings.Fields(message)
	command := func() string {
		if strings.HasPrefix(message, " ") {
			return " " + msglist[0]
		}
		return msglist[0]
	}()

	if command == "emoji" {
		return
	}

	if command == l(commMap[command].Name) {
		commMap[command].Exec(s, m, msglist[1:])
		return
	}

	//if data passed as command isnt a valid command,
	//check if its an emoji
	commMap["emoji"].Exec(s, m, msglist)
}

func listCommands(s *discordgo.Session, m *discordgo.MessageCreate) {
	var commands []string
	for _, val := range commMap {
		if val.Name == "" {
			continue
		}
		commands = append(commands, "`"+val.Name+"`")
	}

	userColor := s.State.UserColor(s.State.User.ID, m.ChannelID)

	edit := newEdit(s, m, userColor)
	edit.setFields([]*discordgo.MessageEmbedField{
		{Name: "List", Value: strings.Join(commands, ", ")},
		{Name: "Info", Value: "\n\nUse `" + conf.Prefix + "help [command]` for detailed info about a command."},
	})
	edit.send()
}

func msgHelp(s *discordgo.Session, m *discordgo.MessageCreate, msglist []string) {
	if len(msglist) == 0 {
		listCommands(s, m)
		return
	}

	command := msglist[0]
	val, ok := commMap[command]
	if !ok {
		return
	}

	userColor := s.State.UserColor(s.State.User.ID, m.ChannelID)

	edit := newEdit(s, m, userColor)
	edit.setFields([]*discordgo.MessageEmbedField{
		{Name: "Details", Value: val.Help},
	})
	edit.setTitle("Help " + val.Name)
	edit.send()
	return
}

func (c command) add() command {
	commMap[l(c.Name)] = c
	return c
}