/
commandHandler.go
211 lines (188 loc) · 4.98 KB
/
commandHandler.go
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package commands
import (
"errors"
"fmt"
"log"
"strings"
"github.com/bwmarrin/discordgo"
"github.com/r-anime/ZeroTsu/config"
"github.com/r-anime/ZeroTsu/db"
"github.com/r-anime/ZeroTsu/entities"
"github.com/r-anime/ZeroTsu/functionality"
)
var (
SlashCommands []*discordgo.ApplicationCommand
SlashCommandsHandlers = make(map[string]func(s *discordgo.Session, i *discordgo.InteractionCreate))
CommandMap = make(map[string]*Command)
aliasMap = make(map[string]string)
)
type Command struct {
Execute func(*discordgo.Session, *discordgo.Message)
Name string
Aliases []string
Desc string
DeleteAfter bool
Permission functionality.Permission
Module string
DMAble bool
Options []*discordgo.ApplicationCommandOption
Handler func(s *discordgo.Session, i *discordgo.InteractionCreate)
}
func Add(c *Command) {
CommandMap[c.Name] = c
for _, alias := range c.Aliases {
aliasMap[alias] = c.Name
}
if c.Handler != nil {
SlashCommands = append(SlashCommands, &discordgo.ApplicationCommand{
Name: c.Name,
Description: c.Desc,
Options: c.Options,
})
SlashCommandsHandlers[c.Name] = c.Handler
}
log.Printf("Added command %s | %d aliases | %v module", c.Name, len(c.Aliases), c.Module)
}
// HandleCommand handles the incoming message
func HandleCommand(s *discordgo.Session, m *discordgo.MessageCreate) {
defer func() {
if rec := recover(); rec != nil {
log.Println(rec)
log.Println("Recovery in HandleCommand with message: " + m.Content)
if m.GuildID != "" {
log.Println("Guild ID: " + m.GuildID)
}
}
}()
if m == nil {
return
}
if m.Author == nil {
return
}
if m.Author.Bot {
return
}
if m.Author.ID == "" {
return
}
if m.Message == nil {
return
}
if m.Message.Content == "" {
return
}
// Handle guild command if it's coming from a server
if m.GuildID != "" {
handleGuild(s, m)
return
}
// Parse the command
var guildPrefix = "."
if len(m.Message.Content) <= 1 || m.Message.Content[0:len(guildPrefix)] != guildPrefix {
return
}
cmdTrigger := strings.Split(m.Content, " ")[0][len(guildPrefix):]
cmdTrigger = strings.ToLower(cmdTrigger)
cmd, ok := CommandMap[cmdTrigger]
if !ok {
cmd, ok = CommandMap[aliasMap[cmdTrigger]]
if !ok {
return
}
}
// Allow only normal DMable commands
if !cmd.DMAble {
return
}
// Execute the command
cmd.Execute(s, m.Message)
}
// Handles a command from a guild
func handleGuild(s *discordgo.Session, m *discordgo.MessageCreate) {
entities.HandleNewGuild(m.GuildID)
guildSettings := db.GetGuildSettings(m.GuildID)
if len(m.Message.Content) <= len(guildSettings.GetPrefix()) || m.Message.Content[0:len(guildSettings.GetPrefix())] != guildSettings.GetPrefix() {
return
}
cmdTrigger := strings.Split(m.Content, " ")[0][len(guildSettings.GetPrefix()):]
cmdTrigger = strings.ToLower(cmdTrigger)
cmd, ok := CommandMap[cmdTrigger]
if !ok {
cmd, ok = CommandMap[aliasMap[cmdTrigger]]
if !ok {
return
}
}
if cmd.Module == "reacts" {
if !guildSettings.GetReactsModule() {
return
}
}
if cmd.Permission != functionality.User || guildSettings.GetModOnly() {
if !functionality.HasElevatedPermissions(s, m.Author.ID, m.GuildID) {
return
}
}
// Sanitize mentions
m.Content = strings.ReplaceAll(m.Content, "@here", "@\u200Bhere")
if m.MentionEveryone {
m.Content = strings.ReplaceAll(m.Content, "@everyone", "@\u200Beveryone")
}
if len(m.MentionRoles) != 0 {
for _, roleID := range m.MentionRoles {
m.Content = strings.ReplaceAll(m.Content, fmt.Sprintf("<@&%s>", roleID), fmt.Sprintf("<@\u200B&%s>", roleID))
}
}
cmd.Execute(s, m.Message)
if cmd.DeleteAfter {
err := s.ChannelMessageDelete(m.ChannelID, m.ID)
if err != nil {
return
}
}
}
func IsValidSlashCommand(s *discordgo.Session, cmdTrigger, authorID, guildID string) bool {
cmd, ok := CommandMap[cmdTrigger]
if !ok {
cmd, ok = CommandMap[aliasMap[cmdTrigger]]
if !ok {
return false
}
}
guildSettings := db.GetGuildSettings(guildID)
if cmd.Module == "reacts" {
if !guildSettings.GetReactsModule() {
return false
}
}
if cmd.Permission != functionality.User || guildSettings.GetModOnly() {
if !functionality.HasElevatedPermissions(s, authorID, guildID) {
return false
}
}
return true
}
func VerifySlashCommand(s *discordgo.Session, cmdTrigger string, i *discordgo.InteractionCreate) error {
if i.GuildID == "" {
return errors.New("Error: This command is available only for moderators or admins in servers, not DMs.")
}
userID := ""
if i.Member == nil {
userID = i.User.ID
} else {
userID = i.Member.User.ID
}
if !IsValidSlashCommand(s, cmdTrigger, userID, i.GuildID) {
return errors.New("Error: You do not have permissions to do this command.")
}
return nil
}
func RegisterSlashCommands(_ *discordgo.Session, _ *discordgo.Ready) {
for _, v := range SlashCommands {
err := config.Mgr.ApplicationCommandCreate("", v)
if err != nil {
log.Panicf("Cannot create '%v' command: %v", v.Name, err)
}
}
}