From 939ddc816b03cab70e3693dc943876cc48489014 Mon Sep 17 00:00:00 2001
From: Gytis Vinclovas <gytis.vinclovas@gmail.com>
Date: Tue, 19 May 2020 16:01:51 +0300
Subject: [PATCH] Added support for Web worker chunk template plugin (#353)

* Support WebWorkerChunkTemplatePlugin

* changelog
---
 CHANGELOG.md                                  |  3 +++
 src/parseUtils.js                             | 21 +++++++++++++++++++
 ...ncChunkWithWebWorkerChunkTemplatePlugin.js |  1 +
 ...hWebWorkerChunkTemplatePlugin.modules.json |  5 +++++
 4 files changed, 30 insertions(+)
 create mode 100644 test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.js
 create mode 100644 test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.modules.json

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ea7a3b1..6ab609c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,9 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 <!-- Add changelog entries for new changes under this section -->
 
+ * **New Feature**
+   * Support [WebWorkerChunkTemplatePlugin](https://github.com/webpack/webpack/blob/c9d4ff7b054fc581c96ce0e53432d44f9dd8ca72/lib/webworker/WebWorkerChunkTemplatePlugin.js) ([#353](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/353) by [@Gongreg](https://github.com/Gongreg))
+
  * **Bug Fix**
    * Support any custom `globalObject` option in Webpack Config. ([#352](https://github.com/webpack-contrib/webpack-bundle-analyzer/pull/352) by [@Gongreg](https://github.com/Gongreg))
 
diff --git a/src/parseUtils.js b/src/parseUtils.js
index c31e6745..f5989105 100644
--- a/src/parseUtils.js
+++ b/src/parseUtils.js
@@ -79,6 +79,15 @@ function parseBundle(bundlePath) {
           return;
         }
 
+        // Webpack v4 WebWorkerChunkTemplatePlugin
+        // globalObject.chunkCallbackName([<chunks>],<modules>, ...);
+        // Both globalObject and chunkCallbackName can be changed through the config, so we can't check them.
+        if (isAsyncWebWorkerChunkExpression(node)) {
+          state.locations = getModulesLocations(args[1]);
+          return;
+        }
+
+
         // Walking into arguments because some of plugins (e.g. `DedupePlugin`) or some Webpack
         // features (e.g. `umd` library output) can wrap modules list into additional IIFE.
         _.each(args, arg => c(arg, state));
@@ -212,6 +221,18 @@ function mayBeAsyncChunkArguments(args) {
   );
 }
 
+function isAsyncWebWorkerChunkExpression(node) {
+  const {callee, type, arguments: args} = node;
+
+  return (
+    type === 'CallExpression' &&
+    callee.type === 'MemberExpression' &&
+    args.length === 2 &&
+    isChunkIds(args[0]) &&
+    isModulesList(args[1])
+  );
+}
+
 function getModulesLocations(node) {
   if (node.type === 'ObjectExpression') {
     // Modules hash
diff --git a/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.js b/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.js
new file mode 100644
index 00000000..5e84dced
--- /dev/null
+++ b/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.js
@@ -0,0 +1 @@
+self.chunkCallbackName([27],{1:function(e,n,t){console.log("Chuck Norris")}});
diff --git a/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.modules.json b/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.modules.json
new file mode 100644
index 00000000..cabfce7a
--- /dev/null
+++ b/test/bundles/validWebpack4AsyncChunkWithWebWorkerChunkTemplatePlugin.modules.json
@@ -0,0 +1,5 @@
+{
+  "modules": {
+    "1": "function(e,n,t){console.log(\"Chuck Norris\")}"
+  }
+}