✨ Added new various utils

edit_message_media.go

@@ -32,8 +32,7 @@ func (b *Bot) EditMessageMedia(emmp *EditMessageMediaParameters) (m *Message, er
 		return nil, err
 	}
 
-	resp := new(Response)
-	resp, err = b.request(src, MethodEditMessageMedia)
+	resp, err := b.request(src, MethodEditMessageMedia)
 	if err != nil {
 		return nil, err
 	}

models.go

@@ -440,7 +440,7 @@ type (
 		// Unique identifier for this file
 		FileID string `json:"file_id"`
 
-		// Video width and height as defined by sender
+		// Video width and height (diameter of the video message) as defined by sender
 		Length int `json:"length"`
 
 		// Duration of the video in seconds as defined by sender

utils_audio.go

@@ -0,0 +1,30 @@
+package telegram
+
+import (
+	"strings"
+)
+
+func (a *Audio) FullName(sep string) (name string) {
+	if !a.HasTitle() {
+		return
+	}
+
+	if a.HasPerformer() {
+		name += a.Performer + sep
+	}
+
+	name += a.Title
+	return
+}
+
+func (a *Audio) HasPerformer() bool {
+	return a != nil && !strings.EqualFold(a.Performer, "")
+}
+
+func (a *Audio) HasTitle() bool {
+	return a != nil && !strings.EqualFold(a.Title, "")
+}
+
+func (a *Audio) HasThumb() bool {
+	return a != nil && a.Thumb != nil
+}

utils_bot.go

@@ -3,6 +3,7 @@ package telegram
 import (
 	"fmt"
 	"net/url"
+	"path"
 	"strings"
 
 	http "github.com/valyala/fasthttp"
@@ -24,12 +25,12 @@ func (b *Bot) SetClient(newClient *http.Client) {
 // New creates a new default Bot structure based on the input access token.
 func New(accessToken string) (*Bot, error) {
 	var err error
-	bot := new(Bot)
-	bot.SetClient(defaultClient)
-	bot.AccessToken = accessToken
+	b := new(Bot)
+	b.SetClient(defaultClient)
+	b.AccessToken = accessToken
 
-	bot.User, err = b.GetMe()
-	return bot, err
+	b.User, err = b.GetMe()
+	return b, err
 }
 
 // IsMessageFromMe checks that the input message is a message from the current
@@ -109,14 +110,12 @@ func (b *Bot) IsMessageMentionsMe(m *Message) bool {
 // IsForwardMentionsMe checks that the input forwarded message mentions the
 // current bot.
 func (b *Bot) IsForwardMentionsMe(m *Message) bool {
-	return m.IsForward() &&
-		b.IsMessageMentionsMe(m)
+	return m.IsForward() && b.IsMessageMentionsMe(m)
 }
 
 // IsReplyMentionsMe checks that the input message mentions the current bot.
 func (b *Bot) IsReplyMentionsMe(m *Message) bool {
-	return m.IsReply() &&
-		b.IsMessageMentionsMe(m.ReplyToMessage)
+	return m.IsReply() && b.IsMessageMentionsMe(m.ReplyToMessage)
 }
 
 // IsMessageToMe checks that the input message is addressed to the current bot.
@@ -138,13 +137,13 @@ func (b *Bot) IsMessageToMe(m *Message) bool {
 // NewFileURL creates a url.URL to file with path getted from GetFile method.
 func (b *Bot) NewFileURL(filePath string) *url.URL {
 	if b == nil ||
-		b.AccessToken == "" ||
-		filePath == "" {
+		strings.EqualFold(b.AccessToken, "") ||
+		strings.EqualFold(filePath, "") {
 		return nil
 	}
 
 	result := defaultURI
-	result.Path = fmt.Sprint("/file/bot", b.AccessToken, "/", filePath)
+	result.Path = path.Join("file", fmt.Sprint("bot", b.AccessToken), filePath)
 
 	return result
 }

utils_chat.go

@@ -1,25 +1,28 @@
 package telegram
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+)
 
 // IsPrivate checks that the current chat is a private chat with single user.
 func (c *Chat) IsPrivate() bool {
-	return c != nil && c.Type == ChatPrivate
+	return c != nil && strings.EqualFold(c.Type, ChatPrivate)
 }
 
 // IsGroup checks that the current chat is a group.
 func (c *Chat) IsGroup() bool {
-	return c != nil && c.Type == ChatGroup
+	return c != nil && strings.EqualFold(c.Type, ChatGroup)
 }
 
 // IsSuperGroup checks that the current chat is a supergroup.
 func (c *Chat) IsSuperGroup() bool {
-	return c != nil && c.Type == ChatSuperGroup
+	return c != nil && strings.EqualFold(c.Type, ChatSuperGroup)
 }
 
 // IsChannel checks that the current chat is a channel.
 func (c *Chat) IsChannel() bool {
-	return c != nil && c.Type == ChatChannel
+	return c != nil && strings.EqualFold(c.Type, ChatChannel)
 }
 
 // HasPinnedMessage checks that the current chat has a pinned message.
@@ -29,7 +32,7 @@ func (c *Chat) HasPinnedMessage() bool {
 
 // HasStickerSet checks that the current chat has a sticker set.
 func (c *Chat) HasStickerSet() bool {
-	return c != nil && c.StickerSetName != ""
+	return c != nil && !strings.EqualFold(c.StickerSetName, "")
 }
 
 // StickerSet return StickerSet structure if StickerSetName is available.
@@ -52,9 +55,27 @@ func (c *Chat) FullName() string {
 		return ""
 	}
 
-	if c.LastName != "" {
+	if c.HasLastName() {
 		return fmt.Sprintln(c.FirstName, c.LastName)
 	}
 
 	return c.FirstName
 }
+
+// HaveLastName checks what the current user has a LastName.
+func (c *Chat) HasLastName() bool {
+	return c != nil && !strings.EqualFold(c.LastName, "")
+}
+
+// HaveUsername checks what the current user has a username.
+func (c *Chat) HasUsername() bool {
+	return c != nil && !strings.EqualFold(c.Username, "")
+}
+
+func (c *Chat) HasDescription() bool {
+	return c != nil && !strings.EqualFold(c.Description, "")
+}
+
+func (c *Chat) HasInviteLink() bool {
+	return c != nil && !strings.EqualFold(c.InviteLink, "")
+}

utils_chosen_inline_result.go

@@ -0,0 +1,5 @@
+package telegram
+
+func (cir *ChosenInlineResult) HasLocation() bool {
+	return cir != nil && cir.Location != nil
+}

utils_contact.go

@@ -0,0 +1,33 @@
+package telegram
+
+import (
+	"fmt"
+	"strings"
+)
+
+// FullName returns the full name of contact or FirstName if LastName is not
+// available.
+func (c *Contact) FullName() string {
+	if c == nil {
+		return ""
+	}
+
+	if c.HasLastName() {
+		return fmt.Sprint(c.FirstName, " ", c.LastName)
+	}
+
+	return c.FirstName
+}
+
+// HaveLastName checks what the current contact has a LastName.
+func (c *Contact) HasLastName() bool {
+	return c != nil && !strings.EqualFold(c.LastName, "")
+}
+
+func (c *Contact) HasTelegram() bool {
+	return c != nil && c.UserID != 0
+}
+
+func (c *Contact) HasVCard() bool {
+	return c != nil && !strings.EqualFold(c.VCard, "")
+}

utils_document.go

@@ -0,0 +1,5 @@
+package telegram
+
+func (d *Document) HasThumb() bool {
+	return d != nil && d.Thumb != nil
+}

utils_entity.go

@@ -3,11 +3,14 @@ package telegram
 import (
 	"fmt"
 	"net/url"
+	"strings"
 )
 
 // ParseURL selects URL from entered text of message and parse it as url.URL.
 func (e *MessageEntity) ParseURL(messageText string) *url.URL {
-	if e == nil || !e.IsURL() || messageText == "" {
+	if e == nil ||
+		!e.IsURL() ||
+		strings.EqualFold(messageText, "") {
 		return nil
 	}
 
@@ -19,7 +22,7 @@ func (e *MessageEntity) ParseURL(messageText string) *url.URL {
 	}
 
 	link, err := url.Parse(string(text[from:to]))
-	if err == nil && link.Scheme == "" {
+	if err == nil && strings.EqualFold(link.Scheme, "") {
 		link, err = url.Parse(fmt.Sprint("http://", link))
 	}
 	if err != nil {
@@ -31,57 +34,57 @@ func (e *MessageEntity) ParseURL(messageText string) *url.URL {
 
 // IsBold checks that the current entity is a bold tag.
 func (e *MessageEntity) IsBold() bool {
-	return e != nil && e.Type == EntityBold
+	return e != nil && strings.EqualFold(e.Type, EntityBold)
 }
 
 // IsBotCommand checks that the current entity is a bot command.
 func (e *MessageEntity) IsBotCommand() bool {
-	return e != nil && e.Type == EntityBotCommand
+	return e != nil && strings.EqualFold(e.Type, EntityBotCommand)
 }
 
 // IsCode checks that the current entity is a code tag.
 func (e *MessageEntity) IsCode() bool {
-	return e != nil && e.Type == EntityCode
+	return e != nil && strings.EqualFold(e.Type, EntityCode)
 }
 
 // IsEmail checks that the current entity is a email.
 func (e *MessageEntity) IsEmail() bool {
-	return e != nil && e.Type == EntityEmail
+	return e != nil && strings.EqualFold(e.Type, EntityEmail)
 }
 
 // IsHashtag checks that the current entity is a hashtag.
 func (e *MessageEntity) IsHashtag() bool {
-	return e != nil && e.Type == EntityHashtag
+	return e != nil && strings.EqualFold(e.Type, EntityHashtag)
 }
 
 // IsItalic checks that the current entity is a italic tag.
 func (e *MessageEntity) IsItalic() bool {
-	return e != nil && e.Type == EntityItalic
+	return e != nil && strings.EqualFold(e.Type, EntityItalic)
 }
 
 // IsMention checks that the current entity is a username mention.
 func (e *MessageEntity) IsMention() bool {
-	return e != nil && e.Type == EntityMention
+	return e != nil && strings.EqualFold(e.Type, EntityMention)
 }
 
 // IsPre checks that the current entity is a pre tag.
 func (e *MessageEntity) IsPre() bool {
-	return e != nil && e.Type == EntityPre
+	return e != nil && strings.EqualFold(e.Type, EntityPre)
 }
 
 // IsTextLink checks that the current entity is a text link.
 func (e *MessageEntity) IsTextLink() bool {
-	return e != nil && e.Type == EntityTextLink
+	return e != nil && strings.EqualFold(e.Type, EntityTextLink)
 }
 
 // IsTextMention checks that the current entity is a mention without username.
 func (e *MessageEntity) IsTextMention() bool {
-	return e != nil && e.Type == EntityTextMention
+	return e != nil && strings.EqualFold(e.Type, EntityTextMention)
 }
 
 // IsURL checks that the current entity is a URL
 func (e *MessageEntity) IsURL() bool {
-	return e != nil && e.Type == EntityURL
+	return e != nil && strings.EqualFold(e.Type, EntityURL)
 }
 
 // TextLink parse current text link entity as url.URL.

utils_inline_query.go

@@ -0,0 +1,5 @@
+package telegram
+
+func (iq *InlineQuery) HasLocation() bool {
+	return iq != nil && iq.Location != nil
+}

utils_member.go

@@ -1,42 +1,46 @@
 package telegram
 
-import "time"
+import (
+	"strings"
+	"time"
+)
 
 // IsCreator checks that current member is creator.
 func (m *ChatMember) IsCreator() bool {
-	return m != nil && m.Status == StatusCreator
+	return m != nil && strings.EqualFold(m.Status, StatusCreator)
 }
 
 // IsAdministrator checks that current member is administrator.
 func (m *ChatMember) IsAdministrator() bool {
-	return m != nil && m.Status == StatusAdministrator
+	return m != nil && strings.EqualFold(m.Status, StatusAdministrator)
 }
 
 // IsMember checks that current member is a m.
 func (m *ChatMember) IsMember() bool {
-	return m != nil && m.Status == StatusMember
+	return m != nil && strings.EqualFold(m.Status, StatusMember)
 }
 
 // IsRestricted checks that current member has been restricted.
 func (m *ChatMember) IsRestricted() bool {
-	return m != nil && m.Status == StatusRestricted
+	return m != nil && strings.EqualFold(m.Status, StatusRestricted)
 }
 
 // IsLeft checks that current member has left the chat.
 func (m *ChatMember) IsLeft() bool {
-	return m != nil && m.Status == StatusLeft
+	return m != nil && strings.EqualFold(m.Status, StatusLeft)
 }
 
 // IsKicked checks that current member has been kicked.
 func (m *ChatMember) IsKicked() bool {
-	return m != nil && m.Status == StatusKicked
+	return m != nil && strings.EqualFold(m.Status, StatusKicked)
 }
 
 // UntilTime parse UntilDate of restrictions and returns time.Time.
-func (m *ChatMember) UntilTime() time.Time {
+func (m *ChatMember) UntilTime() *time.Time {
 	if m == nil {
-		return time.Time{}
+		return nil
 	}
 
-	return time.Unix(m.UntilDate, 0)
+	ut := time.Unix(m.UntilDate, 0)
+	return &ut
 }

utils_message.go

@@ -1,6 +1,7 @@
 package telegram
 
 import (
+	"sort"
 	"strings"
 	"time"
 )
@@ -12,14 +13,12 @@ func (m *Message) IsCommand() bool {
 	}
 
 	entity := m.Entities[0]
-	return entity.IsBotCommand() &&
-		entity.Offset == 0
+	return entity.IsBotCommand() && entity.Offset == 0
 }
 
 // IsCommandEqual checks that the current message is a specific bot command.
 func (m *Message) IsCommandEqual(command string) bool {
-	return m.IsCommand() &&
-		strings.EqualFold(m.Command(), command)
+	return m.IsCommand() && strings.EqualFold(m.Command(), command)
 }
 
 // Command returns identifier of the bot command without bot username, if it was
@@ -67,32 +66,32 @@ func (m *Message) CommandArgument() string {
 
 // IsReply checks that the current message is a reply on other message.
 func (m *Message) IsReply() bool {
-	return m != nil &&
-		m.ReplyToMessage != nil
+	return m != nil && m.ReplyToMessage != nil
 }
 
 // IsForward checks that the current message is a forward of other message.
 func (m *Message) IsForward() bool {
-	return m != nil &&
-		m.ForwardFrom != nil
+	return m != nil && m.ForwardFrom != nil
 }
 
 // Time parse current message Date and returns time.Time.
-func (m *Message) Time() time.Time {
+func (m *Message) Time() *time.Time {
 	if m == nil {
-		return time.Time{}
+		return nil
 	}
 
-	return time.Unix(m.Date, 0)
+	t := time.Unix(m.Date, 0)
+	return &t
 }
 
 // ForwardTime parse current message ForwardDate and returns time.Time.
-func (m *Message) ForwardTime() time.Time {
+func (m *Message) ForwardTime() *time.Time {
 	if m == nil {
-		return time.Time{}
+		return nil
 	}
 
-	return time.Unix(m.ForwardDate, 0)
+	ft := time.Unix(m.ForwardDate, 0)
+	return &ft
 }
 
 // EditTime parse current message EditDate and returns time.Time.
@@ -107,168 +106,142 @@ func (m *Message) EditTime() time.Time {
 
 // HasBeenEdited checks that the current message has been edited.
 func (m *Message) HasBeenEdited() bool {
-	return m != nil &&
-		m.EditDate > 0
+	return m != nil && m.EditDate > 0
 }
 
 // IsText checks that the current message is just a text message.
 func (m *Message) IsText() bool {
-	return m != nil &&
-		m.Text != ""
+	return m != nil && !strings.EqualFold(m.Text, "")
 }
 
 // IsAudio checks that the current message is a audio.
 func (m *Message) IsAudio() bool {
-	return !m.IsText() &&
-		m.Audio != nil
+	return !m.IsText() && m.Audio != nil
 }
 
 // IsDocument checks that the current message is a document.
 func (m *Message) IsDocument() bool {
-	return !m.IsText() &&
-		m.Document != nil
+	return !m.IsText() && m.Document != nil
 }
 
 // IsGame checks that the current message is a game.
 func (m *Message) IsGame() bool {
-	return !m.IsText() &&
-		m.Game != nil
+	return !m.IsText() && m.Game != nil
 }
 
 // IsPhoto checks that the current message is a photo.
 func (m *Message) IsPhoto() bool {
-	return !m.IsText() &&
-		len(m.Photo) > 0
+	return !m.IsText() && len(m.Photo) > 0
 }
 
 // IsSticker checks that the current message is a sticker.
 func (m *Message) IsSticker() bool {
-	return !m.IsText() &&
-		m.Sticker != nil
+	return !m.IsText() && m.Sticker != nil
 }
 
 // IsVideo checks that the current message is a video.
 func (m *Message) IsVideo() bool {
-	return !m.IsText() &&
-		m.Video != nil
+	return !m.IsText() && m.Video != nil
 }
 
 // IsVoice checks that the current message is a voice.
 func (m *Message) IsVoice() bool {
-	return !m.IsText() &&
-		m.Voice != nil
+	return !m.IsText() && m.Voice != nil
 }
 
 // IsVideoNote checks that the current message is a video note.
 func (m *Message) IsVideoNote() bool {
-	return !m.IsText() &&
-		m.VideoNote != nil
+	return !m.IsText() && m.VideoNote != nil
 }
 
 // IsContact checks that the current message is a contact.
 func (m *Message) IsContact() bool {
-	return !m.IsText() &&
-		m.Contact != nil
+	return !m.IsText() && m.Contact != nil
 }
 
 // IsLocation checks that the current message is a location.
 func (m *Message) IsLocation() bool {
-	return !m.IsText() &&
-		m.Location != nil
+	return !m.IsText() && m.Location != nil
 }
 
 // IsVenue checks that the current message is a venue.
 func (m *Message) IsVenue() bool {
-	return !m.IsText() &&
-		m.Venue != nil
+	return !m.IsText() && m.Venue != nil
 }
 
 // IsNewChatMembersEvent checks that the current message is a event of entry of
 // new members.
 func (m *Message) IsNewChatMembersEvent() bool {
-	return !m.IsText() &&
-		len(m.NewChatMembers) > 0
+	return !m.IsText() && len(m.NewChatMembers) > 0
 }
 
 // IsLeftChatMemberEvent checks that the current message is a event of members
 // exit.
 func (m *Message) IsLeftChatMemberEvent() bool {
-	return !m.IsText() &&
-		m.LeftChatMember != nil
+	return !m.IsText() && m.LeftChatMember != nil
 }
 
 // IsNewChatTitleEvent checks that the current message is a event of setting a
 // new chat title.
 func (m *Message) IsNewChatTitleEvent() bool {
-	return !m.IsText() &&
-		m.NewChatTitle != ""
+	return !m.IsText() && !strings.EqualFold(m.NewChatTitle, "")
 }
 
 // IsNewChatPhotoEvent checks that the current message is a event of setting a
 // new chat avatar.
 func (m *Message) IsNewChatPhotoEvent() bool {
-	return !m.IsText() &&
-		len(m.NewChatPhoto) > 0
+	return !m.IsText() && len(m.NewChatPhoto) > 0
 }
 
 // IsDeleteChatPhotoEvent checks that the current message is a event of deleting
 // a chat avatar.
 func (m *Message) IsDeleteChatPhotoEvent() bool {
-	return !m.IsText() &&
-		m.DeleteChatPhoto
+	return !m.IsText() && m.DeleteChatPhoto
 }
 
 // IsGroupChatCreatedEvent checks that the current message is a event of creating
 // a new group.
 func (m *Message) IsGroupChatCreatedEvent() bool {
-	return !m.IsText() &&
-		m.GroupChatCreated
+	return !m.IsText() && m.GroupChatCreated
 }
 
 // IsSupergroupChatCreatedEvent checks that the current message is a event of
 // creating a new supergroup.
 func (m *Message) IsSupergroupChatCreatedEvent() bool {
-	return !m.IsText() &&
-		m.SupergroupChatCreated
+	return !m.IsText() && m.SupergroupChatCreated
 }
 
 // IsChannelChatCreatedEvent checks that the current message is a event of
 // creating a new channel.
 func (m *Message) IsChannelChatCreatedEvent() bool {
-	return !m.IsText() &&
-		m.ChannelChatCreated
+	return !m.IsText() && m.ChannelChatCreated
 }
 
 // IsPinnedMessage checks that the current message is a event of pinning another
 // message.
 func (m *Message) IsPinnedMessage() bool {
-	return !m.IsText() &&
-		m.PinnedMessage != nil
+	return !m.IsText() && m.PinnedMessage != nil
 }
 
 // IsInvoice checks that the current message is a invoice.
 func (m *Message) IsInvoice() bool {
-	return !m.IsText() &&
-		m.Invoice != nil
+	return !m.IsText() && m.Invoice != nil
 }
 
 // IsSuccessfulPayment checks that the current message is a event of successful
 // payment.
 func (m *Message) IsSuccessfulPayment() bool {
-	return !m.IsText() &&
-		m.SuccessfulPayment != nil
+	return !m.IsText() && m.SuccessfulPayment != nil
 }
 
 // HasEntities checks that the current message contains entities.
 func (m *Message) HasEntities() bool {
-	return m.IsText() &&
-		len(m.Entities) > 0
+	return m.IsText() && len(m.Entities) > 0
 }
 
 // HasCaptionEntities checks that the current media contains entities in caption.
 func (m *Message) HasCaptionEntities() bool {
-	return !m.IsText() &&
-		len(m.CaptionEntities) > 0
+	return !m.IsText() && len(m.CaptionEntities) > 0
 }
 
 // HasMentions checks that the current message contains mentions.
@@ -303,14 +276,12 @@ func (m *Message) HasCaptionMentions() bool {
 
 // HasCaption checks that the current media has caption.
 func (m *Message) HasCaption() bool {
-	return !m.IsText() &&
-		m.Caption != ""
+	return !m.IsText() && !strings.EqualFold(m.Caption, "")
 }
 
 // HasAuthorSignature checks that the current channel post has author signature.
 func (m *Message) HasAuthorSignature() bool {
-	return m != nil &&
-		m.AuthorSignature != ""
+	return m != nil && !strings.EqualFold(m.AuthorSignature, "")
 }
 
 // IsEvent checks what current message is a any chat event.
@@ -324,3 +295,72 @@ func (m *Message) IsEvent() bool {
 		m.IsSupergroupChatCreatedEvent() ||
 		m.IsNewChatPhotoEvent()
 }
+
+func sortPhotos(ps []PhotoSize, reverse bool) []PhotoSize {
+	buf := make([]PhotoSize, len(ps))
+	copy(buf, ps)
+
+	sort.Slice(buf, func(i, j int) bool {
+		if reverse {
+			return buf[i].Width > buf[j].Width &&
+				buf[i].Height > buf[j].Height
+		}
+
+		return buf[i].Width < buf[j].Width &&
+			buf[i].Height < buf[j].Height
+	})
+
+	return buf
+}
+
+func (m *Message) BigPhoto() *PhotoSize {
+	if m == nil || !m.IsPhoto() {
+		return nil
+	}
+
+	if len(m.Photo) == 1 {
+		return &m.Photo[0]
+	}
+
+	sp := sortPhotos(m.Photo, true)
+	return &sp[0]
+}
+
+func (m *Message) SmallPhoto() *PhotoSize {
+	if m == nil || !m.IsPhoto() {
+		return nil
+	}
+
+	if len(m.Photo) == 1 {
+		return &m.Photo[0]
+	}
+
+	sp := sortPhotos(m.Photo, false)
+	return &sp[0]
+}
+
+func (m *Message) BigChatPhoto() *PhotoSize {
+	if m == nil || !m.IsNewChatPhotoEvent() {
+		return nil
+	}
+
+	if len(m.NewChatPhoto) == 1 {
+		return &m.NewChatPhoto[0]
+	}
+
+	sp := sortPhotos(m.NewChatPhoto, true)
+	return &sp[0]
+}
+
+func (m *Message) SmallChatPhoto() *PhotoSize {
+	if m == nil || !m.IsNewChatPhotoEvent() {
+		return nil
+	}
+
+	if len(m.NewChatPhoto) == 1 {
+		return &m.NewChatPhoto[0]
+	}
+
+	sp := sortPhotos(m.NewChatPhoto, false)
+	return &sp[0]
+}

utils_sticker.go

@@ -1,10 +1,12 @@
 package telegram
 
+import "strings"
+
 // InSet checks that the current sticker in the stickers set.
 //
 // For uploaded WebP files this return false.
 func (s *Sticker) InSet() bool {
-	return s != nil && s.SetName != ""
+	return s != nil && !strings.EqualFold(s.SetName, "")
 }
 
 // Set use bot for getting parent StickerSet if SetName is present.
@@ -22,3 +24,11 @@ func (s *Sticker) Set(bot *Bot) *StickerSet {
 
 	return set
 }
+
+func (s *Sticker) HasThumb() bool {
+	return s != nil && s.Thumb != nil
+}
+
+func (s *Sticker) IsMask() bool {
+	return s != nil && s.MaskPosition != nil
+}

utils_user.go

@@ -2,6 +2,7 @@ package telegram
 
 import (
 	"fmt"
+	"strings"
 
 	"golang.org/x/text/language"
 )
@@ -27,9 +28,19 @@ func (u *User) FullName() string {
 		return ""
 	}
 
-	if u.LastName != "" {
-		return fmt.Sprintln(u.FirstName, u.LastName)
+	if u.HasLastName() {
+		return fmt.Sprint(u.FirstName, " ", u.LastName)
 	}
 
 	return u.FirstName
 }
+
+// HaveLastName checks what the current user has a LastName.
+func (u *User) HasLastName() bool {
+	return u != nil && !strings.EqualFold(u.LastName, "")
+}
+
+// HaveUsername checks what the current user has a username.
+func (u *User) HasUsername() bool {
+	return u != nil && !strings.EqualFold(u.Username, "")
+}

utils_video.go

@@ -0,0 +1,5 @@
+package telegram
+
+func (v *Video) HasThumb() bool {
+	return v != nil && v.Thumb != nil
+}

utils_video_note.go

@@ -0,0 +1,5 @@
+package telegram
+
+func (vn *VideoNote) HasThumb() bool {
+	return vn != nil && vn.Thumb != nil
+}