fix preview

src/bot.js

@@ -78,7 +78,9 @@ class TgBotSender {
 	async sendVideo (chatId, data, settings = {}, apiOptions = {}) {
 		if (this.parent.mtproto !== null) {
 			const mtprotoMID = await this.parent.mtproto.saveMedia(
-				data, settings.caption ?? ""
+				data, settings.caption ?? "", {
+					thumb: settings.thumb,
+				}
 			);
 			
 			return await this.bot.copyMessage(
@@ -157,6 +159,7 @@ class TgBotSender {
 			.then(async (downloaded) => {
 				//console.debug("downloaded:", downloaded);
 				try {
+					const videoInfo = await video.getVideoInfo();
 					if (downloaded.format.type === "video") {
 						const filesize = (typeof isStream !== "string" || this.parent.mtproto !== null) ? 
 							0 : await getFileSize(downloaded.data);
@@ -170,7 +173,10 @@ class TgBotSender {
 							await this.sendVideo(
 								msg.chat.id,
 								downloaded.data,
-								{ caption: info.title },
+								{
+									caption: info.title,
+									thumb: await downloadFile(videoInfo.thumbnail),
+								},
 								{
 									filename,
 									contentType: isStream === true ? "application/octet-stream" : downloaded.format.mime,
@@ -193,7 +199,6 @@ class TgBotSender {
 							} MB)`);
 						}
 					} else if (downloaded.format.type === "audio") {
-						const videoInfo = await video.getVideoInfo();
 						await this.sendAudio(
 							msg.chat.id,
 							downloaded.data,

src/mtproto.js

@@ -32,7 +32,6 @@ class MTProtoUser {
 				writeStream.on("error", reject);
 				writeStream.on("finish", resolve);
 			});
-			//fs.writeFileSync();
 		}
 		
 		const msg = await this.client.sendFile(config.mtproto.chatId, {
@@ -41,6 +40,14 @@ class MTProtoUser {
 			thumb: options.thumb,
 			//filename: options.filename,
 			supportsStreaming: true,
+			attributes: [
+				new Api.DocumentAttributeVideo({
+					duration: options.duration || 0,
+					w: options.width || 1280,
+					h: options.height || 720,
+					supportsStreaming: true
+				}),
+			],
 		});
 		
 		return msg.id;

src/utils.js

@@ -30,9 +30,6 @@ async function downloadFile (fileUrl) {
 
 			file.on("finish", () => {
 			file.close();
-			/*setTimeout(() => {
-				fs.rm(savePath, () => {});
-			}, 60000);*/
 			resolve(savePath);
 			});
 		}).on("error", (err) => {