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interactions.go
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interactions.go
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package discordgo
import (
"bytes"
"crypto/ed25519"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"strconv"
"time"
)
// InteractionDeadline is the time allowed to respond to an interaction.
const InteractionDeadline = time.Second * 3
// ApplicationCommandType represents the type of application command.
type ApplicationCommandType uint8
// Application command types
const (
// ChatApplicationCommand is default command type. They are slash commands (i.e. called directly from the chat).
ChatApplicationCommand ApplicationCommandType = 1
// UserApplicationCommand adds command to user context menu.
UserApplicationCommand ApplicationCommandType = 2
// MessageApplicationCommand adds command to message context menu.
MessageApplicationCommand ApplicationCommandType = 3
)
// ApplicationCommand represents an application's slash command.
type ApplicationCommand struct {
ID string `json:"id,omitempty"`
ApplicationID string `json:"application_id,omitempty"`
GuildID string `json:"guild_id,omitempty"`
Version string `json:"version,omitempty"`
Type ApplicationCommandType `json:"type,omitempty"`
Name string `json:"name"`
NameLocalizations *map[Locale]string `json:"name_localizations,omitempty"`
// NOTE: DefaultPermission will be soon deprecated. Use DefaultMemberPermissions and Contexts instead.
DefaultPermission *bool `json:"default_permission,omitempty"`
DefaultMemberPermissions *int64 `json:"default_member_permissions,string,omitempty"`
NSFW *bool `json:"nsfw,omitempty"`
// Deprecated: use Contexts instead.
DMPermission *bool `json:"dm_permission,omitempty"`
Contexts *[]InteractionContextType `json:"contexts,omitempty"`
IntegrationTypes *[]ApplicationIntegrationType `json:"integration_types,omitempty"`
// NOTE: Chat commands only. Otherwise it mustn't be set.
Description string `json:"description,omitempty"`
DescriptionLocalizations *map[Locale]string `json:"description_localizations,omitempty"`
Options []*ApplicationCommandOption `json:"options"`
}
// ApplicationCommandOptionType indicates the type of a slash command's option.
type ApplicationCommandOptionType uint8
// Application command option types.
const (
ApplicationCommandOptionSubCommand ApplicationCommandOptionType = 1
ApplicationCommandOptionSubCommandGroup ApplicationCommandOptionType = 2
ApplicationCommandOptionString ApplicationCommandOptionType = 3
ApplicationCommandOptionInteger ApplicationCommandOptionType = 4
ApplicationCommandOptionBoolean ApplicationCommandOptionType = 5
ApplicationCommandOptionUser ApplicationCommandOptionType = 6
ApplicationCommandOptionChannel ApplicationCommandOptionType = 7
ApplicationCommandOptionRole ApplicationCommandOptionType = 8
ApplicationCommandOptionMentionable ApplicationCommandOptionType = 9
ApplicationCommandOptionNumber ApplicationCommandOptionType = 10
ApplicationCommandOptionAttachment ApplicationCommandOptionType = 11
)
func (t ApplicationCommandOptionType) String() string {
switch t {
case ApplicationCommandOptionSubCommand:
return "SubCommand"
case ApplicationCommandOptionSubCommandGroup:
return "SubCommandGroup"
case ApplicationCommandOptionString:
return "String"
case ApplicationCommandOptionInteger:
return "Integer"
case ApplicationCommandOptionBoolean:
return "Boolean"
case ApplicationCommandOptionUser:
return "User"
case ApplicationCommandOptionChannel:
return "Channel"
case ApplicationCommandOptionRole:
return "Role"
case ApplicationCommandOptionMentionable:
return "Mentionable"
case ApplicationCommandOptionNumber:
return "Number"
case ApplicationCommandOptionAttachment:
return "Attachment"
}
return fmt.Sprintf("ApplicationCommandOptionType(%d)", t)
}
// ApplicationCommandOption represents an option/subcommand/subcommands group.
type ApplicationCommandOption struct {
Type ApplicationCommandOptionType `json:"type"`
Name string `json:"name"`
NameLocalizations map[Locale]string `json:"name_localizations,omitempty"`
Description string `json:"description,omitempty"`
DescriptionLocalizations map[Locale]string `json:"description_localizations,omitempty"`
// NOTE: This feature was on the API, but at some point developers decided to remove it.
// So I commented it, until it will be officially on the docs.
// Default bool `json:"default"`
ChannelTypes []ChannelType `json:"channel_types"`
Required bool `json:"required"`
Options []*ApplicationCommandOption `json:"options"`
// NOTE: mutually exclusive with Choices.
Autocomplete bool `json:"autocomplete"`
Choices []*ApplicationCommandOptionChoice `json:"choices"`
// Minimal value of number/integer option.
MinValue *float64 `json:"min_value,omitempty"`
// Maximum value of number/integer option.
MaxValue float64 `json:"max_value,omitempty"`
// Minimum length of string option.
MinLength *int `json:"min_length,omitempty"`
// Maximum length of string option.
MaxLength int `json:"max_length,omitempty"`
}
// ApplicationCommandOptionChoice represents a slash command option choice.
type ApplicationCommandOptionChoice struct {
Name string `json:"name"`
NameLocalizations map[Locale]string `json:"name_localizations,omitempty"`
Value interface{} `json:"value"`
}
// ApplicationCommandPermissions represents a single user or role permission for a command.
type ApplicationCommandPermissions struct {
ID string `json:"id"`
Type ApplicationCommandPermissionType `json:"type"`
Permission bool `json:"permission"`
}
// GuildAllChannelsID is a helper function which returns guild_id-1.
// It is used in ApplicationCommandPermissions to target all the channels within a guild.
func GuildAllChannelsID(guild string) (id string, err error) {
var v uint64
v, err = strconv.ParseUint(guild, 10, 64)
if err != nil {
return
}
return strconv.FormatUint(v-1, 10), nil
}
// ApplicationCommandPermissionsList represents a list of ApplicationCommandPermissions, needed for serializing to JSON.
type ApplicationCommandPermissionsList struct {
Permissions []*ApplicationCommandPermissions `json:"permissions"`
}
// GuildApplicationCommandPermissions represents all permissions for a single guild command.
type GuildApplicationCommandPermissions struct {
ID string `json:"id"`
ApplicationID string `json:"application_id"`
GuildID string `json:"guild_id"`
Permissions []*ApplicationCommandPermissions `json:"permissions"`
}
// ApplicationCommandPermissionType indicates whether a permission is user or role based.
type ApplicationCommandPermissionType uint8
// Application command permission types.
const (
ApplicationCommandPermissionTypeRole ApplicationCommandPermissionType = 1
ApplicationCommandPermissionTypeUser ApplicationCommandPermissionType = 2
ApplicationCommandPermissionTypeChannel ApplicationCommandPermissionType = 3
)
// InteractionType indicates the type of an interaction event.
type InteractionType uint8
// Interaction types
const (
InteractionPing InteractionType = 1
InteractionApplicationCommand InteractionType = 2
InteractionMessageComponent InteractionType = 3
InteractionApplicationCommandAutocomplete InteractionType = 4
InteractionModalSubmit InteractionType = 5
)
func (t InteractionType) String() string {
switch t {
case InteractionPing:
return "Ping"
case InteractionApplicationCommand:
return "ApplicationCommand"
case InteractionMessageComponent:
return "MessageComponent"
case InteractionModalSubmit:
return "ModalSubmit"
}
return fmt.Sprintf("InteractionType(%d)", t)
}
// InteractionContextType represents the context in which interaction can be used or was triggered from.
type InteractionContextType uint
const (
// InteractionContextGuild indicates that interaction can be used within guilds.
InteractionContextGuild InteractionContextType = 0
// InteractionContextBotDM indicates that interaction can be used within DMs with the bot.
InteractionContextBotDM InteractionContextType = 1
// InteractionContextPrivateChannel indicates that interaction can be used within group DMs and DMs with other users.
InteractionContextPrivateChannel InteractionContextType = 2
)
// Interaction represents data of an interaction.
type Interaction struct {
ID string `json:"id"`
AppID string `json:"application_id"`
Type InteractionType `json:"type"`
Data InteractionData `json:"data"`
GuildID string `json:"guild_id"`
ChannelID string `json:"channel_id"`
// The message on which interaction was used.
// NOTE: this field is only filled when a button click triggered the interaction. Otherwise it will be nil.
Message *Message `json:"message"`
// Bitwise set of permissions the app or bot has within the channel the interaction was sent from
AppPermissions int64 `json:"app_permissions,string"`
// The member who invoked this interaction.
// NOTE: this field is only filled when the slash command was invoked in a guild;
// if it was invoked in a DM, the `User` field will be filled instead.
// Make sure to check for `nil` before using this field.
Member *Member `json:"member"`
// The user who invoked this interaction.
// NOTE: this field is only filled when the slash command was invoked in a DM;
// if it was invoked in a guild, the `Member` field will be filled instead.
// Make sure to check for `nil` before using this field.
User *User `json:"user"`
// The user's discord client locale.
Locale Locale `json:"locale"`
// The guild's locale. This defaults to EnglishUS
// NOTE: this field is only filled when the interaction was invoked in a guild.
GuildLocale *Locale `json:"guild_locale"`
Context InteractionContextType `json:"context"`
AuthorizingIntegrationOwners map[ApplicationIntegrationType]string `json:"authorizing_integration_owners"`
Token string `json:"token"`
Version int `json:"version"`
// Any entitlements for the invoking user, representing access to premium SKUs.
// NOTE: this field is only filled in monetized apps
Entitlements []*Entitlement `json:"entitlements"`
}
type interaction Interaction
type rawInteraction struct {
interaction
Data json.RawMessage `json:"data"`
}
// UnmarshalJSON is a method for unmarshalling JSON object to Interaction.
func (i *Interaction) UnmarshalJSON(raw []byte) error {
var tmp rawInteraction
err := json.Unmarshal(raw, &tmp)
if err != nil {
return err
}
*i = Interaction(tmp.interaction)
switch tmp.Type {
case InteractionApplicationCommand, InteractionApplicationCommandAutocomplete:
v := ApplicationCommandInteractionData{}
err = json.Unmarshal(tmp.Data, &v)
if err != nil {
return err
}
i.Data = v
case InteractionMessageComponent:
v := MessageComponentInteractionData{}
err = json.Unmarshal(tmp.Data, &v)
if err != nil {
return err
}
i.Data = v
case InteractionModalSubmit:
v := ModalSubmitInteractionData{}
err = json.Unmarshal(tmp.Data, &v)
if err != nil {
return err
}
i.Data = v
}
return nil
}
// MessageComponentData is helper function to assert the inner InteractionData to MessageComponentInteractionData.
// Make sure to check that the Type of the interaction is InteractionMessageComponent before calling.
func (i Interaction) MessageComponentData() (data MessageComponentInteractionData) {
if i.Type != InteractionMessageComponent {
panic("MessageComponentData called on interaction of type " + i.Type.String())
}
return i.Data.(MessageComponentInteractionData)
}
// ApplicationCommandData is helper function to assert the inner InteractionData to ApplicationCommandInteractionData.
// Make sure to check that the Type of the interaction is InteractionApplicationCommand before calling.
func (i Interaction) ApplicationCommandData() (data ApplicationCommandInteractionData) {
if i.Type != InteractionApplicationCommand && i.Type != InteractionApplicationCommandAutocomplete {
panic("ApplicationCommandData called on interaction of type " + i.Type.String())
}
return i.Data.(ApplicationCommandInteractionData)
}
// ModalSubmitData is helper function to assert the inner InteractionData to ModalSubmitInteractionData.
// Make sure to check that the Type of the interaction is InteractionModalSubmit before calling.
func (i Interaction) ModalSubmitData() (data ModalSubmitInteractionData) {
if i.Type != InteractionModalSubmit {
panic("ModalSubmitData called on interaction of type " + i.Type.String())
}
return i.Data.(ModalSubmitInteractionData)
}
// InteractionData is a common interface for all types of interaction data.
type InteractionData interface {
Type() InteractionType
}
// ApplicationCommandInteractionData contains the data of application command interaction.
type ApplicationCommandInteractionData struct {
ID string `json:"id"`
Name string `json:"name"`
CommandType ApplicationCommandType `json:"type"`
Resolved *ApplicationCommandInteractionDataResolved `json:"resolved"`
// Slash command options
Options []*ApplicationCommandInteractionDataOption `json:"options"`
// Target (user/message) id on which context menu command was called.
// The details are stored in Resolved according to command type.
TargetID string `json:"target_id"`
}
// GetOption finds and returns an application command option by its name.
func (d ApplicationCommandInteractionData) GetOption(name string) (option *ApplicationCommandInteractionDataOption) {
for _, opt := range d.Options {
if opt.Name == name {
option = opt
break
}
}
return
}
// ApplicationCommandInteractionDataResolved contains resolved data of command execution.
// Partial Member objects are missing user, deaf and mute fields.
// Partial Channel objects only have id, name, type and permissions fields.
type ApplicationCommandInteractionDataResolved struct {
Users map[string]*User `json:"users"`
Members map[string]*Member `json:"members"`
Roles map[string]*Role `json:"roles"`
Channels map[string]*Channel `json:"channels"`
Messages map[string]*Message `json:"messages"`
Attachments map[string]*MessageAttachment `json:"attachments"`
}
// Type returns the type of interaction data.
func (ApplicationCommandInteractionData) Type() InteractionType {
return InteractionApplicationCommand
}
// MessageComponentInteractionData contains the data of message component interaction.
type MessageComponentInteractionData struct {
CustomID string `json:"custom_id"`
ComponentType ComponentType `json:"component_type"`
Resolved MessageComponentInteractionDataResolved `json:"resolved"`
// NOTE: Only filled when ComponentType is SelectMenuComponent (3). Otherwise is nil.
Values []string `json:"values"`
}
// MessageComponentInteractionDataResolved contains the resolved data of selected option.
type MessageComponentInteractionDataResolved struct {
Users map[string]*User `json:"users"`
Members map[string]*Member `json:"members"`
Roles map[string]*Role `json:"roles"`
Channels map[string]*Channel `json:"channels"`
}
// Type returns the type of interaction data.
func (MessageComponentInteractionData) Type() InteractionType {
return InteractionMessageComponent
}
// ModalSubmitInteractionData contains the data of modal submit interaction.
type ModalSubmitInteractionData struct {
CustomID string `json:"custom_id"`
Components []MessageComponent `json:"-"`
}
// Type returns the type of interaction data.
func (ModalSubmitInteractionData) Type() InteractionType {
return InteractionModalSubmit
}
// UnmarshalJSON is a helper function to correctly unmarshal Components.
func (d *ModalSubmitInteractionData) UnmarshalJSON(data []byte) error {
type modalSubmitInteractionData ModalSubmitInteractionData
var v struct {
modalSubmitInteractionData
RawComponents []unmarshalableMessageComponent `json:"components"`
}
err := json.Unmarshal(data, &v)
if err != nil {
return err
}
*d = ModalSubmitInteractionData(v.modalSubmitInteractionData)
d.Components = make([]MessageComponent, len(v.RawComponents))
for i, v := range v.RawComponents {
d.Components[i] = v.MessageComponent
}
return err
}
// ApplicationCommandInteractionDataOption represents an option of a slash command.
type ApplicationCommandInteractionDataOption struct {
Name string `json:"name"`
Type ApplicationCommandOptionType `json:"type"`
// NOTE: Contains the value specified by Type.
Value interface{} `json:"value,omitempty"`
Options []*ApplicationCommandInteractionDataOption `json:"options,omitempty"`
// NOTE: autocomplete interaction only.
Focused bool `json:"focused,omitempty"`
}
// GetOption finds and returns an application command option by its name.
func (o ApplicationCommandInteractionDataOption) GetOption(name string) (option *ApplicationCommandInteractionDataOption) {
for _, opt := range o.Options {
if opt.Name == name {
option = opt
break
}
}
return
}
// IntValue is a utility function for casting option value to integer
func (o ApplicationCommandInteractionDataOption) IntValue() int64 {
if o.Type != ApplicationCommandOptionInteger {
panic("IntValue called on data option of type " + o.Type.String())
}
return int64(o.Value.(float64))
}
// UintValue is a utility function for casting option value to unsigned integer
func (o ApplicationCommandInteractionDataOption) UintValue() uint64 {
if o.Type != ApplicationCommandOptionInteger {
panic("UintValue called on data option of type " + o.Type.String())
}
return uint64(o.Value.(float64))
}
// FloatValue is a utility function for casting option value to float
func (o ApplicationCommandInteractionDataOption) FloatValue() float64 {
if o.Type != ApplicationCommandOptionNumber {
panic("FloatValue called on data option of type " + o.Type.String())
}
return o.Value.(float64)
}
// StringValue is a utility function for casting option value to string
func (o ApplicationCommandInteractionDataOption) StringValue() string {
if o.Type != ApplicationCommandOptionString {
panic("StringValue called on data option of type " + o.Type.String())
}
return o.Value.(string)
}
// BoolValue is a utility function for casting option value to bool
func (o ApplicationCommandInteractionDataOption) BoolValue() bool {
if o.Type != ApplicationCommandOptionBoolean {
panic("BoolValue called on data option of type " + o.Type.String())
}
return o.Value.(bool)
}
// ChannelValue is a utility function for casting option value to channel object.
// s : Session object, if not nil, function additionally fetches all channel's data
func (o ApplicationCommandInteractionDataOption) ChannelValue(s *Session) *Channel {
if o.Type != ApplicationCommandOptionChannel {
panic("ChannelValue called on data option of type " + o.Type.String())
}
chanID := o.Value.(string)
if s == nil {
return &Channel{ID: chanID}
}
ch, err := s.State.Channel(chanID)
if err != nil {
ch, err = s.Channel(chanID)
if err != nil {
return &Channel{ID: chanID}
}
}
return ch
}
// RoleValue is a utility function for casting option value to role object.
// s : Session object, if not nil, function additionally fetches all role's data
func (o ApplicationCommandInteractionDataOption) RoleValue(s *Session, gID string) *Role {
if o.Type != ApplicationCommandOptionRole && o.Type != ApplicationCommandOptionMentionable {
panic("RoleValue called on data option of type " + o.Type.String())
}
roleID := o.Value.(string)
if s == nil || gID == "" {
return &Role{ID: roleID}
}
r, err := s.State.Role(gID, roleID)
if err != nil {
roles, err := s.GuildRoles(gID)
if err == nil {
for _, r = range roles {
if r.ID == roleID {
return r
}
}
}
return &Role{ID: roleID}
}
return r
}
// UserValue is a utility function for casting option value to user object.
// s : Session object, if not nil, function additionally fetches all user's data
func (o ApplicationCommandInteractionDataOption) UserValue(s *Session) *User {
if o.Type != ApplicationCommandOptionUser && o.Type != ApplicationCommandOptionMentionable {
panic("UserValue called on data option of type " + o.Type.String())
}
userID := o.Value.(string)
if s == nil {
return &User{ID: userID}
}
u, err := s.User(userID)
if err != nil {
return &User{ID: userID}
}
return u
}
// InteractionResponseType is type of interaction response.
type InteractionResponseType uint8
// Interaction response types.
const (
// InteractionResponsePong is for ACK ping event.
InteractionResponsePong InteractionResponseType = 1
// InteractionResponseChannelMessageWithSource is for responding with a message, showing the user's input.
InteractionResponseChannelMessageWithSource InteractionResponseType = 4
// InteractionResponseDeferredChannelMessageWithSource acknowledges that the event was received, and that a follow-up will come later.
InteractionResponseDeferredChannelMessageWithSource InteractionResponseType = 5
// InteractionResponseDeferredMessageUpdate acknowledges that the message component interaction event was received, and message will be updated later.
InteractionResponseDeferredMessageUpdate InteractionResponseType = 6
// InteractionResponseUpdateMessage is for updating the message to which message component was attached.
InteractionResponseUpdateMessage InteractionResponseType = 7
// InteractionApplicationCommandAutocompleteResult shows autocompletion results. Autocomplete interaction only.
InteractionApplicationCommandAutocompleteResult InteractionResponseType = 8
// InteractionResponseModal is for responding to an interaction with a modal window.
InteractionResponseModal InteractionResponseType = 9
)
// InteractionResponse represents a response for an interaction event.
type InteractionResponse struct {
Type InteractionResponseType `json:"type,omitempty"`
Data *InteractionResponseData `json:"data,omitempty"`
}
// InteractionResponseData is response data for an interaction.
type InteractionResponseData struct {
TTS bool `json:"tts"`
Content string `json:"content"`
Components []MessageComponent `json:"components"`
Embeds []*MessageEmbed `json:"embeds"`
AllowedMentions *MessageAllowedMentions `json:"allowed_mentions,omitempty"`
Files []*File `json:"-"`
Attachments *[]*MessageAttachment `json:"attachments,omitempty"`
Poll *Poll `json:"poll,omitempty"`
// NOTE: only MessageFlagsSuppressEmbeds and MessageFlagsEphemeral can be set.
Flags MessageFlags `json:"flags,omitempty"`
// NOTE: autocomplete interaction only.
Choices []*ApplicationCommandOptionChoice `json:"choices,omitempty"`
// NOTE: modal interaction only.
CustomID string `json:"custom_id,omitempty"`
Title string `json:"title,omitempty"`
}
// VerifyInteraction implements message verification of the discord interactions api
// signing algorithm, as documented here:
// https://discord.com/developers/docs/interactions/receiving-and-responding#security-and-authorization
func VerifyInteraction(r *http.Request, key ed25519.PublicKey) bool {
var msg bytes.Buffer
signature := r.Header.Get("X-Signature-Ed25519")
if signature == "" {
return false
}
sig, err := hex.DecodeString(signature)
if err != nil {
return false
}
if len(sig) != ed25519.SignatureSize {
return false
}
timestamp := r.Header.Get("X-Signature-Timestamp")
if timestamp == "" {
return false
}
msg.WriteString(timestamp)
defer r.Body.Close()
var body bytes.Buffer
// at the end of the function, copy the original body back into the request
defer func() {
r.Body = ioutil.NopCloser(&body)
}()
// copy body into buffers
_, err = io.Copy(&msg, io.TeeReader(r.Body, &body))
if err != nil {
return false
}
return ed25519.Verify(key, msg.Bytes(), sig)
}