Stickers (#1057)

* added in sticker endpoints

* added sticker objects to messages

* add type to Sticker struct

endpoints.go

@@ -31,6 +31,7 @@ var (
 	EndpointGateway    = EndpointAPI + "gateway"
 	EndpointGatewayBot = EndpointGateway + "/bot"
 	EndpointWebhooks   = EndpointAPI + "webhooks/"
+	EndpointStickers   = EndpointAPI + "stickers/"
 
 	EndpointCDN             = "https://cdn.discordapp.com/"
 	EndpointCDNAttachments  = EndpointCDN + "attachments/"
@@ -102,6 +103,8 @@ var (
 	EndpointGuildEmojis          = func(gID string) string { return EndpointGuilds + gID + "/emojis" }
 	EndpointGuildEmoji           = func(gID, eID string) string { return EndpointGuilds + gID + "/emojis/" + eID }
 	EndpointGuildBanner          = func(gID, hash string) string { return EndpointCDNBanners + gID + "/" + hash + ".png" }
+	EndpointGuildStickers        = func(gID string) string { return EndpointGuilds + gID + "/stickers" }
+	EndpointGuildSticker         = func(gID, sID string) string { return EndpointGuilds + gID + "/stickers/" + sID }
 
 	EndpointChannel                   = func(cID string) string { return EndpointChannels + cID }
 	EndpointChannelPermissions        = func(cID string) string { return EndpointChannels + cID + "/permissions" }
@@ -119,6 +122,9 @@ var (
 
 	EndpointGroupIcon = func(cID, hash string) string { return EndpointCDNChannelIcons + cID + "/" + hash + ".png" }
 
+	EndpointSticker            = func(sID string) string { return EndpointStickers + sID }
+	EndpointNitroStickersPacks = EndpointAPI + "/sticker-packs"
+
 	EndpointChannelWebhooks = func(cID string) string { return EndpointChannel(cID) + "/webhooks" }
 	EndpointWebhook         = func(wID string) string { return EndpointWebhooks + wID }
 	EndpointWebhookToken    = func(wID, token string) string { return EndpointWebhooks + wID + "/" + token }

message.go

@@ -130,6 +130,9 @@ type Message struct {
 	// This is a combination of bit masks; the presence of a certain permission can
 	// be checked by performing a bitwise AND between this int and the flag.
 	Flags MessageFlags `json:"flags"`
+
+	// An array of Sticker objects, if any were sent.
+	StickerItems []*Sticker `json:"sticker_items"`
 }
 
 // UnmarshalJSON is a helper function to unmarshal the Message.
@@ -189,6 +192,51 @@ type File struct {
 	Reader      io.Reader
 }
 
+// StickerFormat is the file format of the Sticker.
+type StickerFormat int
+
+// Defines all known Sticker types.
+const (
+	StickerFormatTypePNG    StickerFormat = 1
+	StickerFormatTypeAPNG   StickerFormat = 2
+	StickerFormatTypeLottie StickerFormat = 3
+)
+
+// StickerType is the type of sticker.
+type StickerType int
+
+// Defines Sticker types.
+const (
+	StickerTypeStandard StickerType = 1
+	StickerTypeGuild    StickerType = 2
+)
+
+// Sticker represents a sticker object that can be sent in a Message.
+type Sticker struct {
+	ID          string        `json:"id"`
+	PackID      string        `json:"pack_id"`
+	Name        string        `json:"name"`
+	Description string        `json:"description"`
+	Tags        string        `json:"tags"`
+	Type        StickerType   `json:"type"`
+	FormatType  StickerFormat `json:"format_type"`
+	Available   bool          `json:"available"`
+	GuildID     string        `json:"guild_id"`
+	User        *User         `json:"user"`
+	SortValue   int           `json:"sort_value"`
+}
+
+// StickerPack represents a pack of standard stickers.
+type StickerPack struct {
+	ID             string    `json:"id"`
+	Stickers       []Sticker `json:"stickers"`
+	Name           string    `json:"name"`
+	SKUID          string    `json:"sku_id"`
+	CoverStickerID string    `json:"cover_sticker_id"`
+	Description    string    `json:"description"`
+	BannerAssetID  string    `json:"banner_asset_id"`
+}
+
 // MessageSend stores all parameters you can send with ChannelMessageSendComplex.
 type MessageSend struct {
 	Content         string                  `json:"content,omitempty"`