feat: add date time message entity

Author: fluffur

codec_misc.go

@@ -32,6 +32,16 @@ func (s *MessageEntity) Encode(e *jx.Encoder) {
 		e.Str(s.CustomEmojiID)
 	}
 
+	if s.UnixTime != 0 {
+		e.FieldStart("unix_time")
+		e.Int(s.UnixTime)
+	}
+
+	if s.DateTimeFormat != "" {
+		e.FieldStart("date_time_format")
+		e.Str(s.DateTimeFormat)
+	}
+
 	e.ObjEnd()
 }
 
@@ -88,6 +98,20 @@ func (s *MessageEntity) Decode(d *jx.Decoder) error {
 			}
 
 			s.CustomEmojiID = v
+		case "unix_time":
+			v, err := d.Int()
+			if err != nil {
+				return err
+			}
+
+			s.UnixTime = v
+		case "date_time_format":
+			v, err := d.Str()
+			if err != nil {
+				return err
+			}
+
+			s.DateTimeFormat = v
 		default:
 			return d.Skip()
 		}

entities.go

@@ -2,6 +2,7 @@ package botapi
 
 import (
 	"strconv"
+	"strings"
 
 	"github.com/gotd/td/tg"
 )
@@ -130,6 +131,33 @@ func entitiesFromTg(entities []tg.MessageEntityClass) []MessageEntity {
 		case *tg.MessageEntityCustomEmoji:
 			me.Type = EntityCustomEmoji
 			me.CustomEmojiID = strconv.FormatInt(e.DocumentID, 10)
+		case *tg.MessageEntityFormattedDate:
+			me.Type = EntityDateTime
+			me.UnixTime = e.Date
+
+			if e.Relative {
+				me.DateTimeFormat = "r"
+			} else {
+				var dateTimeFormat strings.Builder
+
+				if e.DayOfWeek {
+					dateTimeFormat.WriteString("w")
+				}
+
+				if e.ShortDate {
+					dateTimeFormat.WriteString("d")
+				} else if e.LongDate {
+					dateTimeFormat.WriteString("D")
+				}
+
+				if e.ShortTime {
+					dateTimeFormat.WriteString("t")
+				} else if e.LongTime {
+					dateTimeFormat.WriteString("T")
+				}
+
+				me.DateTimeFormat = dateTimeFormat.String()
+			}
 		default:
 			// Unknown or bot-irrelevant entity (e.g. unknown future types): skip.
 			continue

enums.go

@@ -73,6 +73,7 @@ const (
 	EntityTextLink             MessageEntityType = "text_link"
 	EntityTextMention          MessageEntityType = "text_mention"
 	EntityCustomEmoji          MessageEntityType = "custom_emoji"
+	EntityDateTime             MessageEntityType = "date_time"
 )
 
 // ChatMemberStatus is a member's status in a chat.

types_message.go

@@ -5,13 +5,15 @@ import "github.com/gotd/td/tg"
 // MessageEntity represents one special entity in a text message (e.g. a
 // hashtag, link, or formatted run).
 type MessageEntity struct {
-	Type          MessageEntityType `json:"type"`
-	Offset        int               `json:"offset"`
-	Length        int               `json:"length"`
-	URL           string            `json:"url,omitempty"`
-	User          *User             `json:"user,omitempty"`
-	Language      string            `json:"language,omitempty"`
-	CustomEmojiID string            `json:"custom_emoji_id,omitempty"`
+	Type           MessageEntityType `json:"type"`
+	Offset         int               `json:"offset"`
+	Length         int               `json:"length"`
+	URL            string            `json:"url,omitempty"`
+	User           *User             `json:"user,omitempty"`
+	Language       string            `json:"language,omitempty"`
+	CustomEmojiID  string            `json:"custom_emoji_id,omitempty"`
+	UnixTime       int               `json:"unix_time,omitempty"`
+	DateTimeFormat string            `json:"date_time_format,omitempty"`
 }
 
 // Contact represents a phone contact.