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mirror of https://github.com/hrfee/jfa-go.git synced 2024-11-05 01:40:10 +00:00
jfa-go/discord.go
Harvey Tindall 6b3fc3d492
lang: correct language names
Low German/Saxon (NDS) is empty entirely, which caused discord lang
registration to error, so i've just filled in the name. Somebody
directly translated "English (US)" into italian instead of putting
Italian in italian, corrected that. Use some common sense!
2023-06-23 13:09:26 +01:00

726 lines
22 KiB
Go

package main
import (
"fmt"
"strings"
"time"
dg "github.com/bwmarrin/discordgo"
)
type DiscordDaemon struct {
Stopped bool
ShutdownChannel chan string
bot *dg.Session
username string
tokens map[string]VerifToken // Map of pins to tokens.
verifiedTokens map[string]DiscordUser // Map of token pins to discord users.
channelID, channelName, inviteChannelID, inviteChannelName string
guildID string
serverChannelName, serverName string
users map[string]DiscordUser // Map of user IDs to users. Added to on first interaction, and loaded from app.storage.discord on start.
roleID string
app *appContext
commandHandlers map[string]func(s *dg.Session, i *dg.InteractionCreate, lang string)
commandIDs []string
}
func newDiscordDaemon(app *appContext) (*DiscordDaemon, error) {
token := app.config.Section("discord").Key("token").String()
if token == "" {
return nil, fmt.Errorf("token was blank")
}
bot, err := dg.New("Bot " + token)
if err != nil {
return nil, err
}
dd := &DiscordDaemon{
Stopped: false,
ShutdownChannel: make(chan string),
bot: bot,
tokens: map[string]VerifToken{},
verifiedTokens: map[string]DiscordUser{},
users: map[string]DiscordUser{},
app: app,
roleID: app.config.Section("discord").Key("apply_role").String(),
commandHandlers: map[string]func(s *dg.Session, i *dg.InteractionCreate, lang string){},
commandIDs: []string{},
}
dd.commandHandlers[app.config.Section("discord").Key("start_command").MustString("start")] = dd.cmdStart
dd.commandHandlers["lang"] = dd.cmdLang
dd.commandHandlers["pin"] = dd.cmdPIN
for _, user := range app.storage.GetDiscord() {
dd.users[user.ID] = user
}
return dd, nil
}
// NewAuthToken generates an 8-character pin in the form "A1-2B-CD".
func (d *DiscordDaemon) NewAuthToken() string {
pin := genAuthToken()
d.tokens[pin] = VerifToken{Expiry: time.Now().Add(VERIF_TOKEN_EXPIRY_SEC * time.Second), JellyfinID: ""}
return pin
}
// NewAssignedAuthToken generates an 8-character pin in the form "A1-2B-CD",
// and assigns it for access only with the given Jellyfin ID.
func (d *DiscordDaemon) NewAssignedAuthToken(id string) string {
pin := genAuthToken()
d.tokens[pin] = VerifToken{Expiry: time.Now().Add(VERIF_TOKEN_EXPIRY_SEC * time.Second), JellyfinID: id}
return pin
}
func (d *DiscordDaemon) NewUnknownUser(channelID, userID, discrim, username string) DiscordUser {
user := DiscordUser{
ChannelID: channelID,
ID: userID,
Username: username,
Discriminator: discrim,
}
return user
}
func (d *DiscordDaemon) MustGetUser(channelID, userID, discrim, username string) DiscordUser {
if user, ok := d.users[userID]; ok {
return user
}
return d.NewUnknownUser(channelID, userID, discrim, username)
}
func (d *DiscordDaemon) run() {
d.bot.AddHandler(d.messageHandler)
d.bot.AddHandler(d.commandHandler)
d.bot.Identify.Intents = dg.IntentsGuildMessages | dg.IntentsDirectMessages | dg.IntentsGuildMembers | dg.IntentsGuildInvites
if err := d.bot.Open(); err != nil {
d.app.err.Printf("Discord: Failed to start daemon: %v", err)
return
}
// Wait for everything to populate, it's slow sometimes.
for d.bot.State == nil {
continue
}
for d.bot.State.User == nil {
continue
}
d.username = d.bot.State.User.Username
for d.bot.State.Guilds == nil {
continue
}
// Choose the last guild (server), for now we don't really support multiple anyway
d.guildID = d.bot.State.Guilds[len(d.bot.State.Guilds)-1].ID
guild, err := d.bot.Guild(d.guildID)
if err != nil {
d.app.err.Printf("Discord: Failed to get guild: %v", err)
}
d.serverChannelName = guild.Name
d.serverName = guild.Name
if channel := d.app.config.Section("discord").Key("channel").String(); channel != "" {
d.channelName = channel
d.serverChannelName += "/" + channel
}
if d.app.config.Section("discord").Key("provide_invite").MustBool(false) {
if invChannel := d.app.config.Section("discord").Key("invite_channel").String(); invChannel != "" {
d.inviteChannelName = invChannel
}
}
defer d.deregisterCommands()
defer d.bot.Close()
go d.registerCommands()
<-d.ShutdownChannel
d.ShutdownChannel <- "Down"
return
}
// ListRoles returns a list of available (excluding bot and @everyone) roles in a guild as a list of containing an array of the guild ID and its name.
func (d *DiscordDaemon) ListRoles() (roles [][2]string, err error) {
var r []*dg.Role
r, err = d.bot.GuildRoles(d.guildID)
if err != nil {
d.app.err.Printf("Discord: Failed to get roles: %v", err)
return
}
for _, role := range r {
if role.Name != d.username && role.Name != "@everyone" {
roles = append(roles, [2]string{role.ID, role.Name})
}
}
// roles = make([][2]string, len(r))
// for i, role := range r {
// roles[i] = [2]string{role.ID, role.Name}
// }
return
}
// ApplyRole applies the member role to the given user if set.
func (d *DiscordDaemon) ApplyRole(userID string) error {
if d.roleID == "" {
return nil
}
return d.bot.GuildMemberRoleAdd(d.guildID, userID, d.roleID)
}
// NewTempInvite creates an invite link, and returns the invite URL, as well as the URL for the server icon.
func (d *DiscordDaemon) NewTempInvite(ageSeconds, maxUses int) (inviteURL, iconURL string) {
var inv *dg.Invite
var err error
if d.inviteChannelName == "" {
d.app.err.Println("Discord: Cannot create invite without channel specified in settings.")
return
}
if d.inviteChannelID == "" {
channels, err := d.bot.GuildChannels(d.guildID)
if err != nil {
d.app.err.Printf("Discord: Couldn't get channel list: %v", err)
return
}
found := false
for _, channel := range channels {
// channel, err := d.bot.Channel(ch.ID)
// if err != nil {
// d.app.err.Printf("Discord: Couldn't get channel: %v", err)
// return
// }
if channel.Name == d.inviteChannelName {
d.inviteChannelID = channel.ID
found = true
break
}
}
if !found {
d.app.err.Printf("Discord: Couldn't find invite channel \"%s\"", d.inviteChannelName)
return
}
}
// channel, err := d.bot.Channel(d.inviteChannelID)
// if err != nil {
// d.app.err.Printf("Discord: Couldn't get invite channel: %v", err)
// return
// }
inv, err = d.bot.ChannelInviteCreate(d.inviteChannelID, dg.Invite{
// Guild: d.bot.State.Guilds[len(d.bot.State.Guilds)-1],
// Channel: channel,
// Inviter: d.bot.State.User,
MaxAge: ageSeconds,
MaxUses: maxUses,
Temporary: false,
})
if err != nil {
d.app.err.Printf("Discord: Failed to create invite: %v", err)
return
}
inviteURL = "https://discord.gg/" + inv.Code
guild, err := d.bot.Guild(d.guildID)
if err != nil {
d.app.err.Printf("Discord: Failed to get guild: %v", err)
return
}
// FIXME: Fix CSS, and handle no icon
iconURL = guild.IconURL("256")
fmt.Println("GOT ICON", iconURL)
return
}
// RenderDiscordUsername returns String of discord username, with support for new discriminator-less versions.
func RenderDiscordUsername[DcUser *dg.User | DiscordUser](user DcUser) string {
u, ok := interface{}(user).(*dg.User)
var discriminator, username string
if ok {
discriminator = u.Discriminator
username = u.Username
} else {
u2 := interface{}(user).(DiscordUser)
discriminator = u2.Discriminator
username = u2.Username
}
if discriminator == "0" {
return "@" + username
}
return username + "#" + discriminator
}
// Returns the user(s) roughly corresponding to the username (if they are in the guild).
// if no discriminator (#xxxx) is given in the username and there are multiple corresponding users, a list of all matching users is returned.
func (d *DiscordDaemon) GetUsers(username string) []*dg.Member {
members, err := d.bot.GuildMembers(
d.guildID,
"",
1000,
)
if err != nil {
d.app.err.Printf("Discord: Failed to get members: %v", err)
return nil
}
hasDiscriminator := strings.Contains(username, "#")
hasAt := strings.HasPrefix(username, "@")
if hasAt {
username = username[1:]
}
var users []*dg.Member
for _, member := range members {
if hasDiscriminator {
if member.User.Username+"#"+member.User.Discriminator == username {
return []*dg.Member{member}
}
}
if hasAt {
if member.User.Username == username && member.User.Discriminator == "0" {
return []*dg.Member{member}
}
}
if strings.Contains(member.User.Username, username) {
users = append(users, member)
}
}
return users
}
func (d *DiscordDaemon) NewUser(ID string) (user DiscordUser, ok bool) {
u, err := d.bot.User(ID)
if err != nil {
d.app.err.Printf("Discord: Failed to get user: %v", err)
return
}
user.ID = ID
user.Username = u.Username
user.Contact = true
user.Discriminator = u.Discriminator
channel, err := d.bot.UserChannelCreate(ID)
if err != nil {
d.app.err.Printf("Discord: Failed to create DM channel: %v", err)
return
}
user.ChannelID = channel.ID
ok = true
return
}
func (d *DiscordDaemon) Shutdown() {
d.Stopped = true
d.ShutdownChannel <- "Down"
<-d.ShutdownChannel
close(d.ShutdownChannel)
}
func (d *DiscordDaemon) registerCommands() {
commands := []*dg.ApplicationCommand{
{
Name: d.app.config.Section("discord").Key("start_command").MustString("start"),
Description: "Start the Discord linking process. The bot will send further instructions.",
},
{
Name: "lang",
Description: "Set the language for the bot.",
Options: []*dg.ApplicationCommandOption{
{
Type: dg.ApplicationCommandOptionString,
Name: "language",
Description: "Language Name",
Required: true,
Choices: []*dg.ApplicationCommandOptionChoice{},
},
},
},
{
Name: "pin",
Description: "Send PIN for Discord verification.",
Options: []*dg.ApplicationCommandOption{
{
Type: dg.ApplicationCommandOptionString,
Name: "pin",
Description: "Verification PIN (e.g AB-CD-EF)",
Required: true,
},
},
},
}
commands[1].Options[0].Choices = make([]*dg.ApplicationCommandOptionChoice, len(d.app.storage.lang.Telegram))
i := 0
for code := range d.app.storage.lang.Telegram {
d.app.debug.Printf("Registering choice \"%s\":\"%s\"\n", d.app.storage.lang.Telegram[code].Meta.Name, code)
commands[1].Options[0].Choices[i] = &dg.ApplicationCommandOptionChoice{
Name: d.app.storage.lang.Telegram[code].Meta.Name,
Value: code,
}
i++
}
// d.deregisterCommands()
d.commandIDs = make([]string, len(commands))
// cCommands, err := d.bot.ApplicationCommandBulkOverwrite(d.bot.State.User.ID, d.guildID, commands)
// if err != nil {
// d.app.err.Printf("Discord: Cannot create commands: %v", err)
// }
for i, cmd := range commands {
command, err := d.bot.ApplicationCommandCreate(d.bot.State.User.ID, d.guildID, cmd)
if err != nil {
d.app.err.Printf("Discord: Cannot create command \"%s\": %v", cmd.Name, err)
} else {
d.app.debug.Printf("Discord: registered command \"%s\"", cmd.Name)
d.commandIDs[i] = command.ID
}
}
}
func (d *DiscordDaemon) deregisterCommands() {
existingCommands, err := d.bot.ApplicationCommands(d.bot.State.User.ID, d.guildID)
if err != nil {
d.app.err.Printf("Discord: Failed to get commands: %v", err)
return
}
for _, cmd := range existingCommands {
if err := d.bot.ApplicationCommandDelete(d.bot.State.User.ID, "", cmd.ID); err != nil {
d.app.err.Printf("Failed to deregister command: %v", err)
}
}
}
func (d *DiscordDaemon) commandHandler(s *dg.Session, i *dg.InteractionCreate) {
if h, ok := d.commandHandlers[i.ApplicationCommandData().Name]; ok {
if i.GuildID != "" && d.channelName != "" {
if d.channelID == "" {
channel, err := s.Channel(i.ChannelID)
if err != nil {
d.app.err.Printf("Discord: Couldn't get channel, will monitor all: %v", err)
d.channelName = ""
}
if channel.Name == d.channelName {
d.channelID = channel.ID
}
}
if d.channelID != i.ChannelID {
d.app.debug.Printf("Discord: Ignoring message as not in specified channel")
return
}
}
if i.Interaction.Member.User.ID == s.State.User.ID {
return
}
lang := d.app.storage.lang.chosenTelegramLang
if user, ok := d.users[i.Interaction.Member.User.ID]; ok {
if _, ok := d.app.storage.lang.Telegram[user.Lang]; ok {
lang = user.Lang
}
}
h(s, i, lang)
}
}
// cmd* methods handle slash-commands, msg* methods handle ! commands.
func (d *DiscordDaemon) cmdStart(s *dg.Session, i *dg.InteractionCreate, lang string) {
channel, err := s.UserChannelCreate(i.Interaction.Member.User.ID)
if err != nil {
d.app.err.Printf("Discord: Failed to create private channel with \"%s\": %v", i.Interaction.Member.User.Username, err)
return
}
user := d.MustGetUser(channel.ID, i.Interaction.Member.User.ID, i.Interaction.Member.User.Discriminator, i.Interaction.Member.User.Username)
d.users[i.Interaction.Member.User.ID] = user
content := d.app.storage.lang.Telegram[lang].Strings.get("discordStartMessage") + "\n"
content += d.app.storage.lang.Telegram[lang].Strings.template("languageMessageDiscord", tmpl{"command": "/lang"})
err = s.InteractionRespond(i.Interaction, &dg.InteractionResponse{
// Type: dg.InteractionResponseChannelMessageWithSource,
Type: dg.InteractionResponseChannelMessageWithSource,
Data: &dg.InteractionResponseData{
Content: content,
Flags: 64, // Ephemeral
},
})
if err != nil {
d.app.err.Printf("Discord: Failed to send reply: %v", err)
return
}
}
func (d *DiscordDaemon) cmdPIN(s *dg.Session, i *dg.InteractionCreate, lang string) {
pin := i.ApplicationCommandData().Options[0].StringValue()
user, ok := d.tokens[pin]
if !ok || time.Now().After(user.Expiry) {
err := s.InteractionRespond(i.Interaction, &dg.InteractionResponse{
// Type: dg.InteractionResponseChannelMessageWithSource,
Type: dg.InteractionResponseChannelMessageWithSource,
Data: &dg.InteractionResponseData{
Content: d.app.storage.lang.Telegram[lang].Strings.get("invalidPIN"),
Flags: 64, // Ephemeral
},
})
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", i.Interaction.Member.User.Username, err)
}
delete(d.tokens, pin)
return
}
err := s.InteractionRespond(i.Interaction, &dg.InteractionResponse{
// Type: dg.InteractionResponseChannelMessageWithSource,
Type: dg.InteractionResponseChannelMessageWithSource,
Data: &dg.InteractionResponseData{
Content: d.app.storage.lang.Telegram[lang].Strings.get("pinSuccess"),
Flags: 64, // Ephemeral
},
})
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", i.Interaction.Member.User.Username, err)
}
dcUser := d.users[i.Interaction.Member.User.ID]
dcUser.JellyfinID = user.JellyfinID
d.verifiedTokens[pin] = dcUser
delete(d.tokens, pin)
}
func (d *DiscordDaemon) cmdLang(s *dg.Session, i *dg.InteractionCreate, lang string) {
code := i.ApplicationCommandData().Options[0].StringValue()
if _, ok := d.app.storage.lang.Telegram[code]; ok {
var user DiscordUser
for jfID, u := range d.app.storage.GetDiscord() {
if u.ID == i.Interaction.Member.User.ID {
u.Lang = code
lang = code
d.app.storage.SetDiscordKey(jfID, u)
user = u
break
}
}
d.users[i.Interaction.Member.User.ID] = user
err := s.InteractionRespond(i.Interaction, &dg.InteractionResponse{
// Type: dg.InteractionResponseChannelMessageWithSource,
Type: dg.InteractionResponseChannelMessageWithSource,
Data: &dg.InteractionResponseData{
Content: d.app.storage.lang.Telegram[lang].Strings.template("languageSet", tmpl{"language": d.app.storage.lang.Telegram[lang].Meta.Name}),
Flags: 64, // Ephemeral
},
})
if err != nil {
d.app.err.Printf("Discord: Failed to send reply: %v", err)
return
}
}
}
func (d *DiscordDaemon) messageHandler(s *dg.Session, m *dg.MessageCreate) {
if m.GuildID != "" && d.channelName != "" {
if d.channelID == "" {
channel, err := s.Channel(m.ChannelID)
if err != nil {
d.app.err.Printf("Discord: Couldn't get channel, will monitor all: %v", err)
d.channelName = ""
}
if channel.Name == d.channelName {
d.channelID = channel.ID
}
}
if d.channelID != m.ChannelID {
d.app.debug.Printf("Discord: Ignoring message as not in specified channel")
return
}
}
if m.Author.ID == s.State.User.ID {
return
}
sects := strings.Split(m.Content, " ")
if len(sects) == 0 {
return
}
lang := d.app.storage.lang.chosenTelegramLang
if user, ok := d.users[m.Author.ID]; ok {
if _, ok := d.app.storage.lang.Telegram[user.Lang]; ok {
lang = user.Lang
}
}
switch msg := sects[0]; msg {
case "!" + d.app.config.Section("discord").Key("start_command").MustString("start"):
d.msgStart(s, m, lang)
case "!lang":
d.msgLang(s, m, sects, lang)
default:
d.msgPIN(s, m, sects, lang)
}
}
func (d *DiscordDaemon) msgStart(s *dg.Session, m *dg.MessageCreate, lang string) {
channel, err := s.UserChannelCreate(m.Author.ID)
if err != nil {
d.app.err.Printf("Discord: Failed to create private channel with \"%s\": %v", m.Author.Username, err)
return
}
user := d.MustGetUser(channel.ID, m.Author.ID, m.Author.Discriminator, m.Author.Username)
d.users[m.Author.ID] = user
_, err = d.bot.ChannelMessageSendReply(m.ChannelID, d.app.storage.lang.Telegram[lang].Strings.get("discordDMs"), m.Reference())
if err != nil {
d.app.err.Printf("Discord: Failed to send reply to \"%s\": %v", m.Author.Username, err)
return
}
content := d.app.storage.lang.Telegram[lang].Strings.get("startMessage") + "\n"
content += d.app.storage.lang.Telegram[lang].Strings.template("languageMessage", tmpl{"command": "!lang"})
_, err = s.ChannelMessageSend(channel.ID, content)
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", m.Author.Username, err)
return
}
}
func (d *DiscordDaemon) msgLang(s *dg.Session, m *dg.MessageCreate, sects []string, lang string) {
if len(sects) == 1 {
list := "!lang <lang>\n"
for code := range d.app.storage.lang.Telegram {
list += fmt.Sprintf("%s: %s\n", code, d.app.storage.lang.Telegram[code].Meta.Name)
}
_, err := s.ChannelMessageSendReply(
m.ChannelID,
list,
m.Reference(),
)
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", m.Author.Username, err)
}
return
}
if _, ok := d.app.storage.lang.Telegram[sects[1]]; ok {
var user DiscordUser
for jfID, u := range d.app.storage.GetDiscord() {
if u.ID == m.Author.ID {
u.Lang = sects[1]
d.app.storage.SetDiscordKey(jfID, u)
user = u
break
}
}
d.users[m.Author.ID] = user
}
}
func (d *DiscordDaemon) msgPIN(s *dg.Session, m *dg.MessageCreate, sects []string, lang string) {
if _, ok := d.users[m.Author.ID]; ok {
channel, err := s.Channel(m.ChannelID)
if err != nil {
d.app.err.Printf("Discord: Failed to get channel: %v", err)
return
}
if channel.Type != dg.ChannelTypeDM {
d.app.debug.Println("Discord: Ignoring message as not a DM")
return
}
} else {
d.app.debug.Println("Discord: Ignoring message as user was not found")
return
}
user, ok := d.tokens[sects[0]]
if !ok || time.Now().After(user.Expiry) {
_, err := s.ChannelMessageSend(
m.ChannelID,
d.app.storage.lang.Telegram[lang].Strings.get("invalidPIN"),
)
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", m.Author.Username, err)
}
delete(d.tokens, sects[0])
return
}
_, err := s.ChannelMessageSend(
m.ChannelID,
d.app.storage.lang.Telegram[lang].Strings.get("pinSuccess"),
)
if err != nil {
d.app.err.Printf("Discord: Failed to send message to \"%s\": %v", m.Author.Username, err)
}
dcUser := d.users[m.Author.ID]
dcUser.JellyfinID = user.JellyfinID
d.verifiedTokens[sects[0]] = dcUser
delete(d.tokens, sects[0])
}
func (d *DiscordDaemon) SendDM(message *Message, userID ...string) error {
channels := make([]string, len(userID))
for i, id := range userID {
channel, err := d.bot.UserChannelCreate(id)
if err != nil {
return err
}
channels[i] = channel.ID
}
return d.Send(message, channels...)
}
func (d *DiscordDaemon) Send(message *Message, channelID ...string) error {
msg := ""
var embeds []*dg.MessageEmbed
if message.Markdown != "" {
msg, embeds = StripAltText(message.Markdown, true)
} else {
msg = message.Text
}
for _, id := range channelID {
var err error
if len(embeds) != 0 {
_, err = d.bot.ChannelMessageSendComplex(
id,
&dg.MessageSend{
Content: msg,
Embed: embeds[0],
},
)
if err != nil {
return err
}
for i := 1; i < len(embeds); i++ {
_, err := d.bot.ChannelMessageSendEmbed(id, embeds[i])
if err != nil {
return err
}
}
} else {
_, err := d.bot.ChannelMessageSend(
id,
msg,
)
if err != nil {
return err
}
}
}
return nil
}
// UserVerified returns whether or not a token with the given PIN has been verified, and the user itself.
func (d *DiscordDaemon) UserVerified(pin string) (user DiscordUser, ok bool) {
user, ok = d.verifiedTokens[pin]
// delete(d.verifiedTokens, pin)
return
}
// AssignedUserVerified returns whether or not a user with the given PIN has been verified, and the token itself.
// Returns false if the given Jellyfin ID does not match the one in the user.
func (d *DiscordDaemon) AssignedUserVerified(pin string, jfID string) (user DiscordUser, ok bool) {
user, ok = d.verifiedTokens[pin]
if ok && user.JellyfinID != jfID {
ok = false
}
// delete(d.verifiedUsers, pin)
return
}
// UserExists returns whether or not a user with the given ID exists.
func (d *DiscordDaemon) UserExists(id string) (ok bool) {
ok = false
for _, u := range d.app.storage.GetDiscord() {
if u.ID == id {
ok = true
break
}
}
return
}
// DeleteVerifiedUser removes the token with the given PIN.
func (d *DiscordDaemon) DeleteVerifiedUser(pin string) {
delete(d.verifiedTokens, pin)
}