✨ Added Stickers utils

utils_sticker.go

@@ -0,0 +1,24 @@
+package telegram
+
+// InSet checks that the current sticker in the stickers set.
+//
+// For uploaded WebP files this return false.
+func (sticker *Sticker) InSet() bool {
+	return sticker != nil && sticker.SetName != ""
+}
+
+// Set use bot for getting parent StickerSet if SetName is present.
+//
+// Return nil if current sticker has been uploaded by user as WebP file.
+func (sticker *Sticker) Set(bot *Bot) *StickerSet {
+	if !sticker.InSet() || bot == nil {
+		return nil
+	}
+
+	set, err := bot.GetStickerSet(sticker.SetName)
+	if err != nil {
+		return nil
+	}
+
+	return set
+}