initial commit

.gitignore

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+node_modules

index.js

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+const express = require('express');
+const bodyParser = require('body-parser');
+const app = express();
+const templates = require('./templates');
+
+app.use(bodyParser.json());
+
+app.post('/generate/:template', (req, res) => {
+
+    const templateName = req.params.template;
+    const options = req.body;
+
+    templates.get(templateName, options, (err, template) => {
+        if (err) {
+            console.error('Error:', err.code, 'for', req.url);
+            res.sendStatus(500).end('Something went wrong, call Thomas');
+            return;
+        }
+
+        let result = template;
+
+        res.send(result);
+        res.end();
+
+    });
+});
+
+app.listen(5000);

package.json

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+{
+  "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"
+  },
+  "author": "Thomas Ruoff <tomru@mail.id0.link>",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.16.1",
+    "express": "^4.14.1"
+  }
+}

templates.js

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+const fs = require('fs');
+const path = require('path');
+
+function replaceOption(string, key, value) {
+    const re = new RegExp(`\\$\{${key}\}`, 'g');
+    return string.replace(re, value);
+}
+
+function cleanUnsetVars(string) {
+    const re = new RegExp('\\$\{[a-zA-Z-_]+\}', 'g');
+    return string.replace(re, '');
+}
+
+module.exports.get = (templateName, options, callback) => {
+    const filename = path.join(__dirname, 'templates', templateName + '.template');
+
+    fs.readFile(filename, 'utf-8', (err, template) => {
+        if (err) {
+            callback(err);
+            return;
+        }
+        const replaced = Object.keys(options).reduce((memo, key) => {
+            return replaceOption(memo, key, options[key]);
+        }, template);
+
+        const result = cleanUnsetVars(replaced);
+
+        callback(null, result);
+    });
+};

templates/brief.template

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+\documentclass{scrlttr2}
+\LoadLetterOption{${LETTER_OPTION}}
+
+\setkomavar{subject}{${SUBJECT}}
+
+\setkomavar{yourref}{${YOURREF}}
+\setkomavar{yourmail}{${YOURMAIL}}
+\setkomavar{myref}{${MYREF}}
+\setkomavar{customer}{${CUSTOMER}}
+\setkomavar{invoice}{${INVOICE}}
+% \setkomavar{yourref}[alternative name]{value}
+
+% custom date
+%\setkomavar{date}{}
+
+%\setkomavar{signature}{\electronicsignature}
+
+\setkomavar{specialmail}{${SPECIALMAIL}}
+
+\begin{document}
+\begin{letter}{${ADDRESS}}
+
+    \opening{${OPENING}}
+
+    ${BODY}
+
+    \closing{${CLOSING}}
+
+    \ps{${PS}}
+
+    \encl{${ENCL}}
+
+\end{letter}
+\end{document}
+