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81 lines
2.5 KiB
81 lines
2.5 KiB
import { FileData } from './types/definitions';
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import { Config } from 'ass-json';
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import fs from 'fs-extra';
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import ffmpeg from 'ffmpeg-static';
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import sharp from 'sharp';
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// @ts-ignore
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import shell from 'any-shell-escape';
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import { exec } from 'child_process';
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import { isProd, path } from './utils';
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const { diskFilePath }: Config = fs.readJsonSync(path('config.json'));
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// Thumbnail parameters
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const THUMBNAIL = {
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QUALITY: 75,
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WIDTH: 200 * 2,
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HEIGHT: 140 * 2,
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}
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/**
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* Builds a safe escaped ffmpeg command
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*/
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function getCommand(src: String, dest: String) {
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return shell([
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ffmpeg, '-y',
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'-v', (isProd ? 'error' : 'debug'), // Log level
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'-i', src, // Input file
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'-ss', '00:00:01.000', // Timestamp of frame to grab
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'-vf', `scale=${THUMBNAIL.WIDTH}:${THUMBNAIL.HEIGHT}:force_original_aspect_ratio=increase,crop=${THUMBNAIL.WIDTH}:${THUMBNAIL.HEIGHT}`, // Dimensions of output file
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'-frames:v', '1', // Number of frames to grab
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dest // Output file
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]);
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}
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/**
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* Builds a thumbnail filename
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*/
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function getNewName(oldName: String) {
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return oldName.concat('.thumbnail.jpg');
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}
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/**
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* Builds a path to the thumbnails
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*/
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function getNewNamePath(oldName: String) {
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return path(diskFilePath, 'thumbnails/', getNewName(oldName));
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}
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/**
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* Extracts an image from a video file to use as a thumbnail, using ffmpeg
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*/
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function getVideoThumbnail(file: FileData) {
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return new Promise((resolve: Function, reject: Function) => exec(
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getCommand(file.path, getNewNamePath(file.randomId)),
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// @ts-ignore
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(err: Error) => (err ? reject(err) : resolve())
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));
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}
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/**
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* Generates a thumbnail for the provided image
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*/
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function getImageThumbnail(file: FileData) {
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return new Promise((resolve, reject) =>
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sharp(file.path)
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.resize(THUMBNAIL.WIDTH, THUMBNAIL.HEIGHT, { kernel: 'cubic' })
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.jpeg({ quality: THUMBNAIL.QUALITY })
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.toFile(getNewNamePath(file.randomId))
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.then(resolve)
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.catch(reject));
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}
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/**
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* Generates a thumbnail
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*/
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export default (file: FileData): Promise<string> =>
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new Promise((resolve, reject) =>
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(file.is.video ? getVideoThumbnail : (file.is.image && !file.mimetype.includes('webp')) ? getImageThumbnail : () => Promise.resolve())(file)
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.then(() => resolve((file.is.video || file.is.image) ? getNewName(file.randomId) : file.is.audio ? 'views/ass-audio-icon.png' : 'views/ass-file-icon.png'))
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.catch(reject));
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