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- const fs = require('fs-extra');
- const path = require('path');
- const utils = require('../../utils');
- const ConvertJpegPng = require('./ConvertJpegPng');
- class ConvertPdfImages extends ConvertJpegPng {
- check(data, opts) {
- const {inputFiles} = opts;
- return this.config.useExternalBookConverter &&
- inputFiles.sourceFileType && inputFiles.sourceFileType.ext == 'pdf';
- }
- async run(data, opts) {
- if (!this.check(data, opts))
- return false;
- let {inputFiles, callback, abort, pdfQuality} = opts;
-
- pdfQuality = (pdfQuality && pdfQuality <= 100 && pdfQuality >= 10 ? pdfQuality : 20);
- const pdftoppmPath = '/usr/bin/pdftoppm';
- if (!await fs.pathExists(pdftoppmPath))
- throw new Error('Внешний конвертер pdftoppm не найден');
- const dir = `${inputFiles.filesDir}/`;
- const baseFile = `${dir}${path.basename(inputFiles.sourceFile)}`;
- const jpgFiles = `${baseFile}.tmp`;
- //конвертируем в jpeg
- let perc = 0;
- await this.execConverter(pdftoppmPath, ['-jpeg', '-jpegopt', `quality=${pdfQuality},progressive=y`, inputFiles.sourceFile, jpgFiles], () => {
- perc = (perc < 100 ? perc + 1 : 40);
- callback(perc);
- }, abort);
- const limitSize = 2*this.config.maxUploadFileSize;
- let jpgFilesSize = 0;
- //ищем изображения
- let files = [];
- await utils.findFiles(async(file) => {
- if (path.extname(file) == '.jpg') {
- jpgFilesSize += (await fs.stat(file)).size;
- if (jpgFilesSize > limitSize) {
- throw new Error(`Файл для конвертирования слишком большой|FORLOG| jpgFilesSize: ${jpgFilesSize} > ${limitSize}`);
- }
- files.push({name: file, base: path.basename(file)});
- }
- }, dir);
- files.sort((a, b) => a.base.localeCompare(b.base));
- //схема документа (outline)
- //const djvusedResult = await this.execConverter(djvusedPath, ['-u', '-e', 'print-outline', inputFiles.sourceFile]);
- const outline = [];
- /*const lines = djvusedResult.stdout.match(/\(".*"\s*?"#\d+".*?\)/g);
- if (lines) {
- lines.forEach(l => {
- const m = l.match(/"(.*)"\s*?"#(\d+)"/);
- if (m) {
- outline[m[2]] = m[1];
- }
- });
- }*/
- await utils.sleep(100);
- let i = 0;
- const imageFiles = files.map(f => {
- i++;
- let alt = (outline[i] ? outline[i] : '');
- return {src: f.name, alt};
- });
- return await super.run(data, Object.assign({}, opts, {imageFiles}));
- }
- }
- module.exports = ConvertPdfImages;
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