99 lines
3.6 KiB
JavaScript
99 lines
3.6 KiB
JavaScript
const fs = require('fs-extra');
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const path = require('path');
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const utils = require('../../utils');
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const ConvertJpegPng = require('./ConvertJpegPng');
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class ConvertDjvu extends ConvertJpegPng {
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check(data, opts) {
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const {inputFiles} = opts;
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return this.config.useExternalBookConverter &&
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inputFiles.sourceFileType && inputFiles.sourceFileType.ext == 'djvu';
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}
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async run(data, opts) {
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if (!this.check(data, opts))
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return false;
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const {inputFiles, callback, abort} = opts;
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const ddjvuPath = '/usr/bin/ddjvu';
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if (!await fs.pathExists(ddjvuPath))
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throw new Error('Внешний конвертер ddjvu не найден');
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const djvusedPath = '/usr/bin/djvused';
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if (!await fs.pathExists(djvusedPath))
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throw new Error('Внешний конвертер djvused не найден');
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const tiffsplitPath = '/usr/bin/tiffsplit';
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if (!await fs.pathExists(tiffsplitPath))
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throw new Error('Внешний конвертер tiffsplitPath не найден');
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const mogrifyPath = '/usr/bin/mogrify';
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if (!await fs.pathExists(mogrifyPath))
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throw new Error('Внешний конвертер mogrifyPath не найден');
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const dir = `${inputFiles.filesDir}/`;
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const baseFile = `${dir}${path.basename(inputFiles.sourceFile)}`;
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const tifFile = `${baseFile}.tif`;
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//конвертируем в tiff
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let perc = 0;
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await this.execConverter(ddjvuPath, ['-format=tiff', '-quality=50', '-verbose', inputFiles.sourceFile, tifFile], () => {
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perc = (perc < 100 ? perc + 1 : 40);
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callback(perc);
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}, abort);
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const tifFileSize = (await fs.stat(tifFile)).size;
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let limitSize = 4*this.config.maxUploadFileSize;
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if (tifFileSize > limitSize) {
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throw new Error(`Файл для конвертирования слишком большой|FORLOG| tifFileSize: ${tifFileSize} > ${limitSize}`);
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}
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//разбиваем на файлы
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await this.execConverter(tiffsplitPath, [tifFile, dir], null, abort);
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await fs.remove(tifFile);
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//конвертируем в jpg
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await this.execConverter(mogrifyPath, ['-quality', '20', '-scale', '2048>', '-verbose', '-format', 'jpg', `${dir}*.tif`], () => {
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perc = (perc < 100 ? perc + 1 : 40);
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callback(perc);
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}, abort);
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//ищем изображения
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let files = [];
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await utils.findFiles(async(file) => {
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if (path.extname(file) == '.jpg')
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files.push({name: file, base: path.basename(file)});
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}, dir);
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files.sort((a, b) => a.base.localeCompare(b.base));
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//схема документа (outline)
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const djvusedResult = await this.execConverter(djvusedPath, ['-u', '-e', 'print-outline', inputFiles.sourceFile]);
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const outline = [];
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const lines = djvusedResult.stdout.match(/\(".*"\s*?"#\d+".*?\)/g);
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if (lines) {
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lines.forEach(l => {
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const m = l.match(/"(.*)"\s*?"#(\d+)"/);
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if (m) {
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outline[m[2]] = m[1];
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}
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});
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}
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await utils.sleep(100);
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let i = 0;
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const imageFiles = files.map(f => {
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i++;
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let alt = (outline[i] ? outline[i] : '');
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return {src: f.name, alt};
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});
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return await super.run(data, Object.assign({}, opts, {imageFiles}));
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}
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}
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module.exports = ConvertDjvu;
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