Create convertFormat.js

lib/convertFormat.js

@@ -0,0 +1,111 @@
+// https://github.com/salismazaya/whatsapp-bot
+
+const fs = require("fs");
+const FileType = require('file-type');
+const { exec } = require("child_process");
+
+if (!fs.existsSync(".temp")) fs.mkdirSync(".temp");
+
+function imageToWebp(bufferImage) {
+	return new Promise((resolve, reject) => {
+		FileType.fromBuffer(bufferImage)
+			.then((response) => {
+				try {
+					const pathFile = ".temp/" + Math.floor(Math.random() * 1000000 + 1) + "." + response.ext;
+					fs.writeFileSync(pathFile, bufferImage);
+					exec(`cwebp -q 50 ${pathFile} -o ${pathFile}.webp`, (error, stdout, stderr) => {
+						if (!fs.existsSync(pathFile + ".webp")) {
+							reject(new Error("failed convert file!"));
+							fs.unlinkSync(pathFile);
+							return;
+						}
+						const webpBufferImage = fs.readFileSync(pathFile + ".webp");
+						fs.unlinkSync(pathFile);
+						fs.unlinkSync(pathFile + ".webp");
+						resolve(webpBufferImage);
+					});
+
+				} catch(e) {
+					reject(e);
+				}
+			})
+			.catch(e => reject(e));
+	});
+}
+
+function webpToJpg(bufferImage) {
+	return new Promise((resolve, reject) => {
+		try {
+			const pathFile = ".temp/" + Math.floor(Math.random() * 1000000 + 1) + ".webp";
+			fs.writeFileSync(pathFile, bufferImage);
+
+			exec(`dwebp ${pathFile} -o ${pathFile}.jpg`, (error, stdout, stderr) => {
+				if (!fs.existsSync(pathFile + ".jpg")) {
+					reject(new Error("failed convert file!"));
+					fs.unlinkSync(pathFile);
+					return;
+				}
+				const jpgBufferImage = fs.readFileSync(pathFile + ".jpg");
+				fs.unlinkSync(pathFile);
+				fs.unlinkSync(pathFile + ".jpg");
+				resolve(jpgBufferImage);
+			})
+		} catch(e) {
+			reject(e);
+		}
+	});
+}
+
+function gifToWebp(bufferImage) {
+	return new Promise((resolve, reject) => {
+		try {
+			const pathFile = ".temp/" + Math.floor(Math.random() * 1000000 + 1) + ".gif";
+			fs.writeFileSync(pathFile, bufferImage);
+
+			exec(`gif2webp ${pathFile} -o ${pathFile}.webp`, (error, stdout, stderr) => {
+				if (!fs.existsSync(pathFile + ".webp")) {
+					reject(new Error("failed convert file!"));
+					fs.unlinkSync(pathFile);
+					return;
+				}
+				const webpBuffer = fs.readFileSync(pathFile + ".webp");
+				fs.unlinkSync(pathFile);
+				fs.unlinkSync(pathFile + ".webp");
+				resolve(webpBuffer);
+			})
+		} catch(e) {
+			reject(e);
+		}
+	});
+}
+
+function webpToVideo(bufferImage) {
+	return new Promise((resolve, reject) => {
+		try {
+			const pathFile = ".temp/" + Math.floor(Math.random() * 1000000 + 1) + ".webp";
+			fs.writeFileSync(pathFile, bufferImage);
+
+			exec(`convert ${pathFile} ${pathFile}.gif`, (error, stdout, stderr) => {
+
+				exec(`ffmpeg -i ${pathFile}.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" ${pathFile}.mp4`, (error, stdout, stderr) => {
+					if (!fs.existsSync(pathFile + ".gif") || !fs.existsSync(pathFile + ".mp4")) {
+						reject(new Error("failed convert file!"));
+						fs.unlinkSync(pathFile);
+						return;
+					}
+					const videoBuffer = fs.readFileSync(pathFile + ".mp4");
+					fs.unlinkSync(pathFile);
+					fs.unlinkSync(pathFile + ".gif");
+					fs.unlinkSync(pathFile + ".mp4");
+					resolve(videoBuffer);
+				});
+
+			});
+		} catch(e) {
+			reject(e);
+		}
+	});
+}
+
+
+module.exports = { imageToWebp, webpToJpg, gifToWebp, webpToVideo }