gocqhttp-twitter-bot/dist/gifski.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const child_process_1 = require("child_process");
const fs_1 = require("fs");
const temp = require("temp");
const loggers_1 = require("./loggers");
const logger = loggers_1.getLogger('gifski');
const sizeLimit = 10 * Math.pow(2, 20);
const roundToEven = (n) => Math.ceil(n / 2) * 2;
exports.default = (data, targetWidth) => __awaiter(void 0, void 0, void 0, function* () {
    const outputFilePath = temp.path({ suffix: '.gif' });
    temp.track();
    try {
        const inputFile = temp.openSync();
        fs_1.writeSync(inputFile.fd, Buffer.from(data));
        fs_1.closeSync(inputFile.fd);
        logger.info(`saved video file to ${inputFile.path}, starting gif conversion...`);
        const args = [
            inputFile.path,
            '-o',
            outputFilePath,
            '--fps',
            '12.5',
            '--quiet',
            '--quality',
            '90',
        ];
        if (typeof (targetWidth) === 'number') {
            args.push('--width', roundToEven(targetWidth).toString());
        }
        logger.info(` gifski ${args.join(' ')}`);
        const gifskiSpawn = child_process_1.spawn('gifski', args);
        const gifskiResult = new Promise((resolve, reject) => {
            const sizeChecker = setInterval(() => {
                if (fs_1.existsSync(outputFilePath) && fs_1.statSync(outputFilePath).size > sizeLimit)
                    gifskiSpawn.kill();
            }, 5000);
            gifskiSpawn.on('exit', () => {
                clearInterval(sizeChecker);
                if (!fs_1.existsSync(outputFilePath) || fs_1.statSync(outputFilePath).size === 0)
                    return reject('no file was created on exit');
                logger.info(`gif conversion succeeded, file path: ${outputFilePath}`);
                resolve(fs_1.readFileSync(outputFilePath).buffer);
            });
        });
        const stderr = [];
        gifskiSpawn.stderr.on('data', errdata => stderr.push(errdata));
        gifskiSpawn.stderr.on('end', () => {
            if (stderr.length !== 0) {
                if (!gifskiSpawn.killed)
                    gifskiSpawn.kill();
                throw Error(Buffer.concat(stderr).toString());
            }
        });
        return yield gifskiResult;
    }
    catch (error) {
        logger.error(`error converting video to gif ${error ? `message: ${error}` : ''}`);
        throw Error('error converting video to gif');
    }
    finally {
        temp.cleanup();
    }
});