filmout_manager/dist/image/index.js

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Image = void 0;
const sharp_1 = __importDefault(require("sharp"));
const hash_1 = require("../hash");
const path_1 = require("path");
const os_1 = require("os");
const promises_1 = require("fs/promises");
const shell_1 = require("../shell");
class Image {
    constructor() {
        this.prefix = 'fm_thumbs';
        this.thumbnailCache = null;
        this.thumbnailHash = null;
        this.blankCache = null;
        this.blankHash = null;
        this.tmp = null;
        if (this.tmp === null) {
            this.tmp = (0, os_1.tmpdir)();
        }
    }
    async mktemp(ext = '.png') {
        const randomString = Math.random().toString(36).slice(2);
        const tempPath = (0, path_1.join)(this.tmp, this.prefix, randomString + `.${ext}`);
        try {
            await (0, promises_1.mkdir)((0, path_1.join)(this.tmp, this.prefix));
        }
        catch (err) {
            //
        }
        return tempPath;
    }
    async dpx2png(input, output) {
        let dpx = null;
        const args = [
            'convert',
            input,
            '-colorspace', 'RGB',
            '-depth', '8',
            output
        ];
        const shell = new shell_1.Shell(args, null, null, null, null, true);
        try {
            await shell.execute();
        }
        catch (err) {
            //
        }
    }
    async thumbnail(path, width, height) {
        const hash = hash_1.Hashes.stringHash(`${path},${width},${height}`);
        let newPath = null;
        if (hash !== this.thumbnailHash) {
            if ((0, path_1.extname)(path).toLowerCase() === '.dpx') {
                try {
                    newPath = await this.mktemp('png');
                    await this.dpx2png(path, newPath);
                    path = newPath;
                }
                catch (err) {
                    //
                }
            }
            const options = {
                width,
                height,
                fit: sharp_1.default.fit.fill
            };
            this.thumbnailCache = await (0, sharp_1.default)(path).resize(options).jpeg().toBuffer();
            this.thumbnailHash = hash;
            if (newPath !== null) {
                try {
                    await (0, promises_1.unlink)(newPath);
                }
                catch (err) {
                    //
                }
            }
        }
        return this.thumbnailCache;
    }
    async blank(width, height) {
        const hash = hash_1.Hashes.stringHash(`${width},${height}`);
        if (hash !== this.blankHash) {
            const options = {
                create: {
                    width,
                    height,
                    channels: 3,
                    background: { r: 125, g: 125, b: 125 }
                }
            };
            this.blankCache = await (0, sharp_1.default)(options).jpeg().toBuffer();
            this.blankHash = hash;
        }
        return this.blankCache;
    }
}
exports.Image = Image;
module.exports = { Image };
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