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602 lines
22 KiB
Go
602 lines
22 KiB
Go
package discordgo
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import (
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"bytes"
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"crypto/ed25519"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"strconv"
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"time"
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)
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// InteractionDeadline is the time allowed to respond to an interaction.
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const InteractionDeadline = time.Second * 3
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// ApplicationCommandType represents the type of application command.
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type ApplicationCommandType uint8
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// Application command types
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const (
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// ChatApplicationCommand is default command type. They are slash commands (i.e. called directly from the chat).
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ChatApplicationCommand ApplicationCommandType = 1
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// UserApplicationCommand adds command to user context menu.
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UserApplicationCommand ApplicationCommandType = 2
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// MessageApplicationCommand adds command to message context menu.
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MessageApplicationCommand ApplicationCommandType = 3
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)
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// ApplicationCommand represents an application's slash command.
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type ApplicationCommand struct {
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ID string `json:"id,omitempty"`
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ApplicationID string `json:"application_id,omitempty"`
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GuildID string `json:"guild_id,omitempty"`
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Version string `json:"version,omitempty"`
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Type ApplicationCommandType `json:"type,omitempty"`
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Name string `json:"name"`
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NameLocalizations *map[Locale]string `json:"name_localizations,omitempty"`
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// NOTE: DefaultPermission will be soon deprecated. Use DefaultMemberPermissions and DMPermission instead.
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DefaultPermission *bool `json:"default_permission,omitempty"`
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DefaultMemberPermissions *int64 `json:"default_member_permissions,string,omitempty"`
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DMPermission *bool `json:"dm_permission,omitempty"`
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// NOTE: Chat commands only. Otherwise it mustn't be set.
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Description string `json:"description,omitempty"`
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DescriptionLocalizations *map[Locale]string `json:"description_localizations,omitempty"`
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Options []*ApplicationCommandOption `json:"options"`
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}
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// ApplicationCommandOptionType indicates the type of a slash command's option.
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type ApplicationCommandOptionType uint8
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// Application command option types.
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const (
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ApplicationCommandOptionSubCommand ApplicationCommandOptionType = 1
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ApplicationCommandOptionSubCommandGroup ApplicationCommandOptionType = 2
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ApplicationCommandOptionString ApplicationCommandOptionType = 3
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ApplicationCommandOptionInteger ApplicationCommandOptionType = 4
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ApplicationCommandOptionBoolean ApplicationCommandOptionType = 5
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ApplicationCommandOptionUser ApplicationCommandOptionType = 6
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ApplicationCommandOptionChannel ApplicationCommandOptionType = 7
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ApplicationCommandOptionRole ApplicationCommandOptionType = 8
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ApplicationCommandOptionMentionable ApplicationCommandOptionType = 9
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ApplicationCommandOptionNumber ApplicationCommandOptionType = 10
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ApplicationCommandOptionAttachment ApplicationCommandOptionType = 11
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)
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func (t ApplicationCommandOptionType) String() string {
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switch t {
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case ApplicationCommandOptionSubCommand:
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return "SubCommand"
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case ApplicationCommandOptionSubCommandGroup:
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return "SubCommandGroup"
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case ApplicationCommandOptionString:
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return "String"
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case ApplicationCommandOptionInteger:
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return "Integer"
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case ApplicationCommandOptionBoolean:
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return "Boolean"
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case ApplicationCommandOptionUser:
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return "User"
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case ApplicationCommandOptionChannel:
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return "Channel"
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case ApplicationCommandOptionRole:
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return "Role"
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case ApplicationCommandOptionMentionable:
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return "Mentionable"
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case ApplicationCommandOptionNumber:
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return "Number"
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case ApplicationCommandOptionAttachment:
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return "Attachment"
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}
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return fmt.Sprintf("ApplicationCommandOptionType(%d)", t)
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}
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// ApplicationCommandOption represents an option/subcommand/subcommands group.
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type ApplicationCommandOption struct {
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Type ApplicationCommandOptionType `json:"type"`
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Name string `json:"name"`
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NameLocalizations map[Locale]string `json:"name_localizations,omitempty"`
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Description string `json:"description,omitempty"`
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DescriptionLocalizations map[Locale]string `json:"description_localizations,omitempty"`
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// NOTE: This feature was on the API, but at some point developers decided to remove it.
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// So I commented it, until it will be officially on the docs.
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// Default bool `json:"default"`
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ChannelTypes []ChannelType `json:"channel_types"`
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Required bool `json:"required"`
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Options []*ApplicationCommandOption `json:"options"`
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// NOTE: mutually exclusive with Choices.
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Autocomplete bool `json:"autocomplete"`
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Choices []*ApplicationCommandOptionChoice `json:"choices"`
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// Minimal value of number/integer option.
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MinValue *float64 `json:"min_value,omitempty"`
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// Maximum value of number/integer option.
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MaxValue float64 `json:"max_value,omitempty"`
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// Minimum length of string option.
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MinLength *int `json:"min_length,omitempty"`
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// Maximum length of string option.
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MaxLength int `json:"max_length,omitempty"`
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}
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// ApplicationCommandOptionChoice represents a slash command option choice.
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type ApplicationCommandOptionChoice struct {
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Name string `json:"name"`
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NameLocalizations map[Locale]string `json:"name_localizations,omitempty"`
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Value interface{} `json:"value"`
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}
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// ApplicationCommandPermissions represents a single user or role permission for a command.
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type ApplicationCommandPermissions struct {
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ID string `json:"id"`
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Type ApplicationCommandPermissionType `json:"type"`
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Permission bool `json:"permission"`
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}
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// GuildAllChannelsID is a helper function which returns guild_id-1.
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// It is used in ApplicationCommandPermissions to target all the channels within a guild.
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func GuildAllChannelsID(guild string) (id string, err error) {
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var v uint64
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v, err = strconv.ParseUint(guild, 10, 64)
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if err != nil {
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return
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}
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return strconv.FormatUint(v-1, 10), nil
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}
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// ApplicationCommandPermissionsList represents a list of ApplicationCommandPermissions, needed for serializing to JSON.
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type ApplicationCommandPermissionsList struct {
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Permissions []*ApplicationCommandPermissions `json:"permissions"`
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}
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// GuildApplicationCommandPermissions represents all permissions for a single guild command.
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type GuildApplicationCommandPermissions struct {
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ID string `json:"id"`
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ApplicationID string `json:"application_id"`
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GuildID string `json:"guild_id"`
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Permissions []*ApplicationCommandPermissions `json:"permissions"`
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}
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// ApplicationCommandPermissionType indicates whether a permission is user or role based.
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type ApplicationCommandPermissionType uint8
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// Application command permission types.
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const (
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ApplicationCommandPermissionTypeRole ApplicationCommandPermissionType = 1
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ApplicationCommandPermissionTypeUser ApplicationCommandPermissionType = 2
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ApplicationCommandPermissionTypeChannel ApplicationCommandPermissionType = 3
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)
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// InteractionType indicates the type of an interaction event.
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type InteractionType uint8
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// Interaction types
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const (
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InteractionPing InteractionType = 1
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InteractionApplicationCommand InteractionType = 2
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InteractionMessageComponent InteractionType = 3
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InteractionApplicationCommandAutocomplete InteractionType = 4
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InteractionModalSubmit InteractionType = 5
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)
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func (t InteractionType) String() string {
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switch t {
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case InteractionPing:
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return "Ping"
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case InteractionApplicationCommand:
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return "ApplicationCommand"
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case InteractionMessageComponent:
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return "MessageComponent"
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case InteractionModalSubmit:
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return "ModalSubmit"
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}
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return fmt.Sprintf("InteractionType(%d)", t)
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}
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// Interaction represents data of an interaction.
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type Interaction struct {
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ID string `json:"id"`
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AppID string `json:"application_id"`
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Type InteractionType `json:"type"`
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Data InteractionData `json:"data"`
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GuildID string `json:"guild_id"`
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ChannelID string `json:"channel_id"`
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// The message on which interaction was used.
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// NOTE: this field is only filled when a button click triggered the interaction. Otherwise it will be nil.
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Message *Message `json:"message"`
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// Bitwise set of permissions the app or bot has within the channel the interaction was sent from
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AppPermissions int64 `json:"app_permissions,string"`
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// The member who invoked this interaction.
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// NOTE: this field is only filled when the slash command was invoked in a guild;
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// if it was invoked in a DM, the `User` field will be filled instead.
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// Make sure to check for `nil` before using this field.
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Member *Member `json:"member"`
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// The user who invoked this interaction.
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// NOTE: this field is only filled when the slash command was invoked in a DM;
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// if it was invoked in a guild, the `Member` field will be filled instead.
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// Make sure to check for `nil` before using this field.
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User *User `json:"user"`
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// The user's discord client locale.
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Locale Locale `json:"locale"`
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// The guild's locale. This defaults to EnglishUS
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// NOTE: this field is only filled when the interaction was invoked in a guild.
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GuildLocale *Locale `json:"guild_locale"`
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Token string `json:"token"`
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Version int `json:"version"`
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}
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type interaction Interaction
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type rawInteraction struct {
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interaction
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Data json.RawMessage `json:"data"`
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}
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// UnmarshalJSON is a method for unmarshalling JSON object to Interaction.
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func (i *Interaction) UnmarshalJSON(raw []byte) error {
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var tmp rawInteraction
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err := json.Unmarshal(raw, &tmp)
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if err != nil {
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return err
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}
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*i = Interaction(tmp.interaction)
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switch tmp.Type {
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case InteractionApplicationCommand, InteractionApplicationCommandAutocomplete:
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v := ApplicationCommandInteractionData{}
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err = json.Unmarshal(tmp.Data, &v)
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if err != nil {
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return err
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}
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i.Data = v
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case InteractionMessageComponent:
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v := MessageComponentInteractionData{}
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err = json.Unmarshal(tmp.Data, &v)
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if err != nil {
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return err
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}
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i.Data = v
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case InteractionModalSubmit:
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v := ModalSubmitInteractionData{}
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err = json.Unmarshal(tmp.Data, &v)
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if err != nil {
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return err
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}
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i.Data = v
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}
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return nil
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}
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// MessageComponentData is helper function to assert the inner InteractionData to MessageComponentInteractionData.
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// Make sure to check that the Type of the interaction is InteractionMessageComponent before calling.
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func (i Interaction) MessageComponentData() (data MessageComponentInteractionData) {
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if i.Type != InteractionMessageComponent {
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panic("MessageComponentData called on interaction of type " + i.Type.String())
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}
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return i.Data.(MessageComponentInteractionData)
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}
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// ApplicationCommandData is helper function to assert the inner InteractionData to ApplicationCommandInteractionData.
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// Make sure to check that the Type of the interaction is InteractionApplicationCommand before calling.
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func (i Interaction) ApplicationCommandData() (data ApplicationCommandInteractionData) {
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if i.Type != InteractionApplicationCommand && i.Type != InteractionApplicationCommandAutocomplete {
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panic("ApplicationCommandData called on interaction of type " + i.Type.String())
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}
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return i.Data.(ApplicationCommandInteractionData)
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}
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// ModalSubmitData is helper function to assert the inner InteractionData to ModalSubmitInteractionData.
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// Make sure to check that the Type of the interaction is InteractionModalSubmit before calling.
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func (i Interaction) ModalSubmitData() (data ModalSubmitInteractionData) {
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if i.Type != InteractionModalSubmit {
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panic("ModalSubmitData called on interaction of type " + i.Type.String())
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}
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return i.Data.(ModalSubmitInteractionData)
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}
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// InteractionData is a common interface for all types of interaction data.
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type InteractionData interface {
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Type() InteractionType
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}
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// ApplicationCommandInteractionData contains the data of application command interaction.
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type ApplicationCommandInteractionData struct {
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ID string `json:"id"`
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Name string `json:"name"`
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Resolved *ApplicationCommandInteractionDataResolved `json:"resolved"`
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// Slash command options
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Options []*ApplicationCommandInteractionDataOption `json:"options"`
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// Target (user/message) id on which context menu command was called.
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// The details are stored in Resolved according to command type.
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TargetID string `json:"target_id"`
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}
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// ApplicationCommandInteractionDataResolved contains resolved data of command execution.
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// Partial Member objects are missing user, deaf and mute fields.
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// Partial Channel objects only have id, name, type and permissions fields.
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type ApplicationCommandInteractionDataResolved struct {
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Users map[string]*User `json:"users"`
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Members map[string]*Member `json:"members"`
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Roles map[string]*Role `json:"roles"`
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Channels map[string]*Channel `json:"channels"`
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Messages map[string]*Message `json:"messages"`
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Attachments map[string]*MessageAttachment `json:"attachments"`
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}
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// Type returns the type of interaction data.
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func (ApplicationCommandInteractionData) Type() InteractionType {
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return InteractionApplicationCommand
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}
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// MessageComponentInteractionData contains the data of message component interaction.
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type MessageComponentInteractionData struct {
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CustomID string `json:"custom_id"`
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ComponentType ComponentType `json:"component_type"`
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// NOTE: Only filled when ComponentType is SelectMenuComponent (3). Otherwise is nil.
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Values []string `json:"values"`
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}
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// Type returns the type of interaction data.
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func (MessageComponentInteractionData) Type() InteractionType {
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return InteractionMessageComponent
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}
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// ModalSubmitInteractionData contains the data of modal submit interaction.
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type ModalSubmitInteractionData struct {
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CustomID string `json:"custom_id"`
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Components []MessageComponent `json:"-"`
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}
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// Type returns the type of interaction data.
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func (ModalSubmitInteractionData) Type() InteractionType {
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return InteractionModalSubmit
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}
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// UnmarshalJSON is a helper function to correctly unmarshal Components.
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func (d *ModalSubmitInteractionData) UnmarshalJSON(data []byte) error {
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type modalSubmitInteractionData ModalSubmitInteractionData
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var v struct {
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modalSubmitInteractionData
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RawComponents []unmarshalableMessageComponent `json:"components"`
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}
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err := json.Unmarshal(data, &v)
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if err != nil {
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return err
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}
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*d = ModalSubmitInteractionData(v.modalSubmitInteractionData)
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d.Components = make([]MessageComponent, len(v.RawComponents))
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for i, v := range v.RawComponents {
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d.Components[i] = v.MessageComponent
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}
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return err
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}
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// ApplicationCommandInteractionDataOption represents an option of a slash command.
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type ApplicationCommandInteractionDataOption struct {
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Name string `json:"name"`
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Type ApplicationCommandOptionType `json:"type"`
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// NOTE: Contains the value specified by Type.
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Value interface{} `json:"value,omitempty"`
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Options []*ApplicationCommandInteractionDataOption `json:"options,omitempty"`
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// NOTE: autocomplete interaction only.
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Focused bool `json:"focused,omitempty"`
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}
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// IntValue is a utility function for casting option value to integer
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func (o ApplicationCommandInteractionDataOption) IntValue() int64 {
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if o.Type != ApplicationCommandOptionInteger {
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panic("IntValue called on data option of type " + o.Type.String())
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}
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return int64(o.Value.(float64))
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}
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// UintValue is a utility function for casting option value to unsigned integer
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func (o ApplicationCommandInteractionDataOption) UintValue() uint64 {
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if o.Type != ApplicationCommandOptionInteger {
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panic("UintValue called on data option of type " + o.Type.String())
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}
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return uint64(o.Value.(float64))
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}
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// FloatValue is a utility function for casting option value to float
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func (o ApplicationCommandInteractionDataOption) FloatValue() float64 {
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if o.Type != ApplicationCommandOptionNumber {
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panic("FloatValue called on data option of type " + o.Type.String())
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}
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return o.Value.(float64)
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}
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// StringValue is a utility function for casting option value to string
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func (o ApplicationCommandInteractionDataOption) StringValue() string {
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if o.Type != ApplicationCommandOptionString {
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panic("StringValue called on data option of type " + o.Type.String())
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}
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return o.Value.(string)
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}
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// BoolValue is a utility function for casting option value to bool
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func (o ApplicationCommandInteractionDataOption) BoolValue() bool {
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if o.Type != ApplicationCommandOptionBoolean {
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panic("BoolValue called on data option of type " + o.Type.String())
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}
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return o.Value.(bool)
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}
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// ChannelValue is a utility function for casting option value to channel object.
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// s : Session object, if not nil, function additionally fetches all channel's data
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func (o ApplicationCommandInteractionDataOption) ChannelValue(s *Session) *Channel {
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if o.Type != ApplicationCommandOptionChannel {
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panic("ChannelValue called on data option of type " + o.Type.String())
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}
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chanID := o.Value.(string)
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if s == nil {
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return &Channel{ID: chanID}
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}
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ch, err := s.State.Channel(chanID)
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if err != nil {
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ch, err = s.Channel(chanID)
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if err != nil {
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return &Channel{ID: chanID}
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}
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}
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return ch
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}
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// RoleValue is a utility function for casting option value to role object.
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// s : Session object, if not nil, function additionally fetches all role's data
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func (o ApplicationCommandInteractionDataOption) RoleValue(s *Session, gID string) *Role {
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if o.Type != ApplicationCommandOptionRole && o.Type != ApplicationCommandOptionMentionable {
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panic("RoleValue called on data option of type " + o.Type.String())
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}
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roleID := o.Value.(string)
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if s == nil || gID == "" {
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return &Role{ID: roleID}
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}
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r, err := s.State.Role(roleID, gID)
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if err != nil {
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roles, err := s.GuildRoles(gID)
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if err == nil {
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for _, r = range roles {
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if r.ID == roleID {
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return r
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}
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}
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}
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return &Role{ID: roleID}
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}
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return r
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}
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// UserValue is a utility function for casting option value to user object.
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// s : Session object, if not nil, function additionally fetches all user's data
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func (o ApplicationCommandInteractionDataOption) UserValue(s *Session) *User {
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if o.Type != ApplicationCommandOptionUser && o.Type != ApplicationCommandOptionMentionable {
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panic("UserValue called on data option of type " + o.Type.String())
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}
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userID := o.Value.(string)
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if s == nil {
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return &User{ID: userID}
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}
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u, err := s.User(userID)
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if err != nil {
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return &User{ID: userID}
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}
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return u
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}
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// InteractionResponseType is type of interaction response.
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type InteractionResponseType uint8
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// Interaction response types.
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const (
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// InteractionResponsePong is for ACK ping event.
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InteractionResponsePong InteractionResponseType = 1
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// InteractionResponseChannelMessageWithSource is for responding with a message, showing the user's input.
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InteractionResponseChannelMessageWithSource InteractionResponseType = 4
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// InteractionResponseDeferredChannelMessageWithSource acknowledges that the event was received, and that a follow-up will come later.
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InteractionResponseDeferredChannelMessageWithSource InteractionResponseType = 5
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// InteractionResponseDeferredMessageUpdate acknowledges that the message component interaction event was received, and message will be updated later.
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InteractionResponseDeferredMessageUpdate InteractionResponseType = 6
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// InteractionResponseUpdateMessage is for updating the message to which message component was attached.
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InteractionResponseUpdateMessage InteractionResponseType = 7
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// 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:"-"`
|
|
|
|
// 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)
|
|
}
|