Enable pdf export

ts/export/packer/local.ts

@@ -1,4 +1,7 @@
 import * as fs from "fs";
+import * as os from "os";
+import * as path from "path";
+import * as util from "util";
 
 import { Document } from "../../docx/document";
 import { Media } from "../../media";
@@ -7,17 +10,44 @@ import { Properties } from "../../properties";
 import { Styles } from "../../styles";
 import { IPackOptions } from "./pack-options";
 import { Packer } from "./packer";
+import { PdfConvertWrapper } from "./pdf-convert-wrapper";
 
 export class LocalPacker extends Packer {
     private stream: fs.WriteStream;
+    private pdfConverter: PdfConvertWrapper;
 
     constructor(document: Document, styles?: Styles, properties?: Properties, numbering?: Numbering, media?: Media) {
         super(document, styles, properties, numbering, media);
+
+        this.pdfConverter = new PdfConvertWrapper();
     }
 
-    public pack(path: string, options?: IPackOptions): void {
-        path = path.replace(/.docx$/, "");
-        this.stream = fs.createWriteStream(`${path}.docx`);
+    public pack(filePath: string): void {
+        filePath = filePath.replace(/.docx$/, "");
+
+        this.stream = fs.createWriteStream(`${filePath}.docx`);
         super.compile(this.stream);
     }
+
+    public async packPdf(filePath: string): Promise<void> {
+        filePath = filePath.replace(/.pdf$/, "");
+
+        const fileName = path.basename(filePath, path.extname(filePath));
+        const tempPath = path.join(os.tmpdir(), `${fileName}.docx`);
+        this.stream = fs.createWriteStream(tempPath);
+        await super.compile(this.stream);
+        const text = await this.pdfConverter.convert(tempPath);
+        // const writeFile = util.promisify(fs.writeFile); --use this in future, in 3 years time. Only in node 8
+        // return writeFile(`${filePath}.pdf`, text);
+        return new Promise<void>((resolve, reject) => {
+            fs.writeFile(`${filePath}.pdf`, text, (err) => {
+                if (err) {
+                    reject(err);
+                    return;
+                }
+                resolve();
+            });
+        });
+
+    }
 }