Add fix for doc without rId in rels

.eslintignore

@@ -21,3 +21,4 @@ build/
 vendor/
 js/
 test/
+coverage/

.eslintrc

@@ -122,7 +122,7 @@
     "no-restricted-syntax": 2,
     "no-return-assign": 2,
     "no-script-url": 2,
-    "no-self-compare": 2,
+    "no-self-compare": 0,
     "no-sequences": 2,
     "no-shadow": 0,
     "no-shadow-restricted-names": 2,

es6/imgManager.js

@@ -35,11 +35,14 @@ module.exports = class ImgManager {
 		const content = DocUtils.decodeUtf8(file.asText());
 		this.xmlDoc = DocUtils.str2xml(content);
 		// Get all Rids
-		const RidArray = [];
+		const RidArray = [0];
 		const iterable = this.xmlDoc.getElementsByTagName("Relationship");
 		for (let i = 0, tag; i < iterable.length; i++) {
 			tag = iterable[i];
-			RidArray.push(parseInt(tag.getAttribute("Id").substr(3), 10));
+			const id = tag.getAttribute("Id");
+			if (/^rId[0-9]+$/.test(id)) {
+				RidArray.push(parseInt(id.substr(3), 10));
+			}
 		}
 		this.maxRid = DocUtils.maxArray(RidArray);
 		this.imageRels = [];

es6/index.js

 "use strict";
 
+const isNaN = function (number) {
+	return !(number === number);
+};
+
 const SubContent = require("docxtemplater").SubContent;
 const ImgManager = require("./imgManager");
 const ImgReplacer = require("./imgReplacer");
@@ -131,6 +135,9 @@ class ImageModule {
 		return null;
 	}
 	getImageXml(rId, size) {
+		if (isNaN(rId)) {
+			throw new Error("rId is NaN, aborting");
+		}
 		return `<w:drawing>
   <wp:inline distT="0" distB="0" distL="0" distR="0">
     <wp:extent cx="${size[0]}" cy="${size[1]}"/>
@@ -182,6 +189,9 @@ class ImageModule {
 		`;
 	}
 	getImageXmlCentered(rId, size) {
+		if (isNaN(rId)) {
+			throw new Error("rId is NaN, aborting");
+		}
 		return `		<w:p>
 		  <w:pPr>
 			<w:jc w:val="center"/>