add server dir

server/index.js

@@ -0,0 +1,46 @@
+const express = require('express');
+const bodyParser = require('body-parser');
+const cors = require('cors');
+const app = express();
+const templates = require('./templates');
+const renderer = require('./renderer');
+
+const {getPdfPath} = require('./utils');
+
+app.use(bodyParser.json());
+
+app.options('/api/pdf/generate/:template', cors());
+app.post('/api/pdf/generate/:template', cors(), (req, res) => {
+
+    const templateName = req.params.template;
+    const options = req.body;
+
+    templates.get(templateName, options, (err, texDocument) => {
+        if (err) {
+            console.error('Error:', err.code, 'for', req.url);
+            res.sendStatus(500).end('Something went wrong while generating Tex source');
+            return;
+        }
+
+        renderer(texDocument, (err, pdfFilePath) => {
+            if (err) {
+                console.error('Error:', err.code, 'for', req.url);
+                res.sendStatus(500).end('Something went wrong while baking the PDF');
+                return;
+            }
+            const id = pdfFilePath.replace('/tmp/', '');
+            res.send({id: id});
+            res.end();
+        });
+    });
+});
+
+app.options('/api/pdf/:id', cors());
+app.get('/api/pdf/:id', cors(), (req, res) => {
+    const {id} = req.params;
+    res.sendFile(getPdfPath(id));
+});
+
+app.use(express.static('./client/build'));
+
+app.listen(5000);

server/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "pdfer",
+  "version": "1.0.0",
+  "description": "Generate pdfs based on a template",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js",
+    "watch": "nodemon index.js"
+  },
+  "author": "Thomas Ruoff <tomru@mail.id0.link>",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.16.1",
+    "cors": "^2.8.1",
+    "express": "^4.14.1",
+    "uuid": "^3.0.1"
+  },
+  "devDependencies": {
+    "eslint": "^3.16.0",
+    "nodemon": "^1.11.0"
+  }
+}

server/renderer.js

@@ -0,0 +1,52 @@
+const fs = require('fs');
+const spawn = require('child_process').spawn;
+const uuid = require('uuid');
+
+const {getDirPath, getDocPath} = require('./utils');
+
+
+function copyToTemp(id, texDocument, callback) {
+    const dirPath = getDirPath(id);
+
+    fs.mkdir(dirPath, (err) => {
+        if (err) {
+            callback(err);
+            return;
+        }
+
+        const docPath = getDocPath(id);
+        fs.writeFile(docPath, texDocument, (err) => {
+            if (err) {
+                callback(err);
+            }
+            callback(null);
+        });
+    });
+}
+
+function generateDoc(id, callback) {
+    const pdflatex = spawn('pdflatex', [getDocPath(id), '-interaction', 'nonstopmode'], {cwd: getDirPath(id)});
+    pdflatex.stderr.on('data', (data) => {
+        console.error('onData', data);
+    });
+
+    pdflatex.on('close', (code) => {
+        if (code > 0) {
+            callback(`pdflatex returned with code ${code}`);
+            return;
+        }
+        console.log(`PDF ${id} generated`);
+        callback(null, id);
+    });
+}
+
+module.exports = (texDocument, callback) => {
+    const id = uuid.v1();
+    copyToTemp(id, texDocument, (err) => {
+        if (err) {
+            callback(err);
+            return;
+        }
+        generateDoc(id, callback);
+    });
+};

server/templates.js

@@ -0,0 +1,13 @@
+const path = require('path');
+
+module.exports.get = (templateName, options, callback) => {
+    const modulePath = path.join(__dirname, 'templates', templateName);
+    let template;
+
+    try {
+        template = require(modulePath);
+        callback(null, template(options));
+    } catch (e) {
+        callback(`${templateName} not found!`);
+    }
+};

server/templates/brief.js

@@ -0,0 +1,60 @@
+function convertLineBreaks(string){
+    return string.replace(/\n/g, '\\\\');
+};
+
+module.exports = (options) => {
+
+    const {
+            template = 'brief-fam',
+            subject = 'Betreff',
+            yourRef = '',
+            yourRefName = 'Ihr Zeichen',
+            yourMail = '',
+            myRef = '',
+            customer = '',
+            invoice = '',
+            date = '\\today',
+            signature = '',
+            specialMail = '',
+            address = 'Max Mustermann\\\\Musterstrasse\\\\12345 Musterstadt',
+            opening = 'Sehr geehrte Damen und Herren',
+            body = 'Inhalt des Briefes',
+            closing = 'Mit freundlichen Grüßen',
+            ps = '',
+            enclosing = '',
+        } = options;
+
+    return `% brief document
+\\documentclass{scrlttr2}
+\\LoadLetterOption{${template}}
+
+\\setkomavar{subject}{${subject}}
+
+\\setkomavar{yourref}[${yourRefName}]{${yourRef}}
+\\setkomavar{yourmail}{${yourMail}}
+\\setkomavar{myref}{${myRef}}
+\\setkomavar{customer}{${customer}}
+\\setkomavar{invoice}{${invoice}}
+
+\\setkomavar{date}{${date}}
+
+%\\setkomavar{signature}{${signature}}
+
+\\setkomavar{specialmail}{${specialMail}}
+
+\\begin{document}
+\\begin{letter}{${convertLineBreaks(address)}}
+
+    \\opening{${opening},}
+
+    ${convertLineBreaks(body)}
+
+    \\closing{${closing}}
+
+    \\ps{${ps}}
+
+    %\\encl{${enclosing}}
+
+\\end{letter}
+\\end{document}`;
+};

server/utils.js

@@ -0,0 +1,19 @@
+const path = require('path');
+
+function getDirPath(id) {
+    return `/tmp/pdfer-${id}`;
+}
+
+function getDocPath(id) {
+    return path.join(getDirPath(id), 'doc.tex');
+}
+
+function getPdfPath(id) {
+    return path.join(getDirPath(id), 'doc.pdf');
+}
+
+module.exports = {
+    getDirPath,
+    getDocPath,
+    getPdfPath
+};