files: add file_name and disable content type detection fields

file.go

@@ -9,6 +9,7 @@ import (
 type File struct {
 	FileID   string `json:"file_id"`
 	UniqueID string `json:"file_unique_id"`
+	FileName string `json:"file_name"`
 	FileSize int    `json:"file_size"`
 
 	// file on telegram server https://core.telegram.org/bots/api#file

options.go

@@ -50,6 +50,9 @@ type SendOptions struct {
 
 	// ParseMode controls how client apps render your message.
 	ParseMode ParseMode
+
+	// DisableContentDetection abilities to disable server-side file content type detection.
+	DisableContentDetection bool
 }
 
 func (og *SendOptions) copy() *SendOptions {

util.go

@@ -1,13 +1,13 @@
 package telebot
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/pkg/errors"
 	"log"
 	"net/http"
 	"strconv"
-	"bytes"
-	"github.com/pkg/errors"
 )
 
 func (b *Bot) debug(err error) {
@@ -195,6 +195,10 @@ func (b *Bot) embedSendOptions(params map[string]string, opt *SendOptions) {
 		params["parse_mode"] = opt.ParseMode
 	}
 
+	if opt.DisableContentDetection {
+		params["disable_content_type_detection"] = "true"
+	}
+
 	if opt.ReplyMarkup != nil {
 		processButtons(opt.ReplyMarkup.InlineKeyboard)
 		replyMarkup, _ := json.Marshal(opt.ReplyMarkup)