Put LinkUtil to renderer-side.

app/main/link-helper.js

@@ -1,16 +0,0 @@
-const wurl = require('wurl');
-
-// Check link if it's internal/external
-function linkIsInternal(currentUrl, newUrl) {
-	const currentDomain = wurl('hostname', currentUrl);
-	const newDomain = wurl('hostname', newUrl);
-	return currentDomain === newDomain;
-}
-
-// We'll be needing this to open images in default browser
-const skipImages = '.jpg|.gif|.png|.jpeg|.JPG|.PNG';
-
-module.exports = {
-	linkIsInternal,
-	skipImages
-};

app/renderer/js/components/webview.js

@@ -2,7 +2,7 @@
 
 const DomainUtil = require(__dirname + '/../utils/domain-util.js');
 const SystemUtil = require(__dirname + '/../utils/system-util.js');
-const {linkIsInternal, skipImages} = require(__dirname + '/../../../main/link-helper');
+const LinkUtil = require(__dirname + '/../utils/link-util.js');
 const {app, dialog, shell} = require('electron').remote;
 const {ipcRenderer} = require('electron');
 
@@ -25,6 +25,7 @@ class WebView extends BaseComponent {
 		this.isActive = isActive;
 		this.domainUtil = new DomainUtil();
 		this.systemUtil = new SystemUtil();
+		this.linkUtil = new LinkUtil();
 		this.badgeCount = 0;
 	}
 
@@ -52,7 +53,7 @@ class WebView extends BaseComponent {
 			const {url} = event;
 			const domainPrefix = this.domainUtil.getDomain(this.index).url;
 
-			if (linkIsInternal(domainPrefix, url) && url.match(skipImages) === null) {
+			if (this.linkUtil.isInternal(domainPrefix, url)) {
 				event.preventDefault();
 				this.$el.loadURL(url);
 			} else {

app/renderer/js/utils/link-util.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const wurl = require('wurl');
+
+let instance = null;
+
+class LinkUtil {
+	constructor() {
+		if (instance) {
+			return instance;
+		} else {
+			instance = this;
+		}
+
+		return instance;
+	}
+
+    isInternal(currentUrl, newUrl) {
+        const currentDomain = wurl('hostname', currentUrl);
+        const newDomain = wurl('hostname', newUrl);
+
+        const skipImages = '.jpg|.gif|.png|.jpeg|.JPG|.PNG';
+
+        // We'll be needing this to open images in default browser
+        return (currentDomain === newDomain) || newUrl.match(skipImages);
+    }
+}
+
+module.exports = LinkUtil;