From 55d5f6524d87995e0576f97c708d384217962e87 Mon Sep 17 00:00:00 2001
From: Book Pauk <bookpauk@gmail.com>
Date: Thu, 28 Feb 2019 18:58:41 +0700
Subject: [PATCH] =?UTF-8?q?=D0=A0=D0=B0=D0=B1=D0=BE=D1=82=D0=B0=20=D0=BD?=
 =?UTF-8?q?=D0=B0=D0=B4=20=D0=BA=D0=BE=D0=BD=D0=B2=D0=B5=D1=80=D1=82=D0=B5?=
 =?UTF-8?q?=D1=80=D0=BE=D0=BC=20Pdf?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 server/core/BookConverter/ConvertPdf.js | 81 +++++++++++++++++++++++++
 server/core/BookConverter/index.js      |  1 +
 server/core/FileDecompressor.js         |  2 +
 3 files changed, 84 insertions(+)
 create mode 100644 server/core/BookConverter/ConvertPdf.js

diff --git a/server/core/BookConverter/ConvertPdf.js b/server/core/BookConverter/ConvertPdf.js
new file mode 100644
index 00000000..a29f495a
--- /dev/null
+++ b/server/core/BookConverter/ConvertPdf.js
@@ -0,0 +1,81 @@
+const fs = require('fs-extra');
+
+const sax = require('./sax');
+const utils = require('../utils');
+const ConvertHtml = require('./ConvertHtml');
+
+class ConvertPdf extends ConvertHtml {
+    check(data, opts) {
+        const {inputFiles} = opts;
+
+        return this.config.useExternalBookConverter && 
+            inputFiles.sourceFileType && inputFiles.sourceFileType.ext == 'pdf';
+    }
+
+    async run(notUsed, opts) {
+        if (!this.check(notUsed, opts))
+            return false;
+        await this.checkExternalConverterPresent();
+
+        const {inputFiles, callback} = opts;
+
+        const outFile = `${inputFiles.fileListDir}/${utils.randomHexString(10)}.xml`;
+
+        //конвертируем в xml
+        await this.execConverter(this.pdfToHtmlPath, ['-c', '-s', '-xml', inputFiles.sourceFile, outFile]);
+        callback(50);
+
+        const data = await fs.readFile(outFile);
+        callback(60);
+
+        //парсим xml
+        let lines = [];
+        let inText = false;
+        let title = '';
+        let i = -1;
+
+        const onTextNode = (text, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+            if (!cutCounter && inText) {
+                lines[i].text += text + ' ';
+                if (i < 2)
+                    title += text + ' ';
+            }
+        };
+
+        const onStartNode = (tag, tail, singleTag, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+            if (!cutCounter) {
+                if (tag == 'text' && !inText) {
+                    inText = true;
+                    i++;
+
+                    let attrs = sax.getAttrsSync(tail);
+                    lines[i] = {
+                        text: '',
+                        top: (attrs.top && attrs.top.value ? attrs.top.value : null),
+                        left: (attrs.left && attrs.left.value ? attrs.left.value : null),
+                    };
+                }
+            }
+        };
+
+        const onEndNode = (tag, tail, singleTag, cutCounter, cutTag) => {// eslint-disable-line no-unused-vars
+            if (tag == 'text')
+                inText = false;
+        };
+
+        let buf = this.decode(data).toString();
+        sax.parseSync(buf, {
+            onStartNode, onEndNode, onTextNode
+        });
+
+        //найдем параграфы и отступы
+console.log(lines.length);
+        //формируем текст
+        let text = ''
+
+        text = title + "\n" + text;
+        return await super.run(Buffer.from(text), {skipCheck: true, isText: true});
+    }
+}
+
+module.exports = ConvertPdf;
diff --git a/server/core/BookConverter/index.js b/server/core/BookConverter/index.js
index 6249b911..6f680324 100644
--- a/server/core/BookConverter/index.js
+++ b/server/core/BookConverter/index.js
@@ -3,6 +3,7 @@ const FileDetector = require('../FileDetector');
 
 //порядок важен
 const convertClassFactory = [
+    require('./ConvertPdf'),
     require('./ConvertRtf'),
     require('./ConvertDocX'),
     require('./ConvertDoc'),
diff --git a/server/core/FileDecompressor.js b/server/core/FileDecompressor.js
index 9948147b..73d46538 100644
--- a/server/core/FileDecompressor.js
+++ b/server/core/FileDecompressor.js
@@ -15,6 +15,8 @@ class FileDecompressor {
     }
 
     async decompressFile(filename, outputDir) {
+        await fs.ensureDir(outputDir);
+        
         const fileType = await this.detector.detectFile(filename);
 
         let result = {