From bbb91fbe595ced7f87ff66bbe92f9e766a56ec84 Mon Sep 17 00:00:00 2001
From: Smartin <smartin@nematronic.de>
Date: Wed, 24 Nov 2021 18:05:45 +0100
Subject: [PATCH] add context to replace function

---
 README.md           | 5 ++++-
 lib/processChunk.js | 2 +-
 lib/replace.js      | 4 ++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 2497028..70d3d90 100644
--- a/README.md
+++ b/README.md
@@ -133,7 +133,10 @@ module.exports = {
         loader: 'string-replace-loader',
         options: {
           search: '^Hello, (.*)!$',
-          replace: (match, p1, offset, string) => `Bonjour, ${p1.toUpperCase()}!`,
+          replace(match, p1, offset, string) {
+            console.log(`Replace "${match}" in file "${this.resource}".`)
+            return `Bonjour, ${p1.toUpperCase()}!`
+          },
           flags: 'g'
         }
       }
diff --git a/lib/processChunk.js b/lib/processChunk.js
index 718df47..79fc341 100644
--- a/lib/processChunk.js
+++ b/lib/processChunk.js
@@ -8,7 +8,7 @@ function processChunk (source, map) {
   let newSource = source
 
   for (const options of optionsArray) {
-    newSource = replace(newSource, options)
+    newSource = replace(newSource, options, this)
   }
 
   this.callback(null, newSource, map)
diff --git a/lib/replace.js b/lib/replace.js
index b56b071..eb6cc26 100644
--- a/lib/replace.js
+++ b/lib/replace.js
@@ -1,5 +1,5 @@
 
-function replace (source, options) {
+function replace (source, options, context) {
   const { replace, flags, strict } = options
   let search
   if (options.search instanceof RegExp) {
@@ -15,7 +15,7 @@ function replace (source, options) {
     throw new Error('Replace failed (strict mode) : options.search and options.replace are required')
   }
 
-  const newSource = source.replace(search, replace)
+  const newSource = source.replace(search, typeof replace === 'function' ? replace.bind(context) : replace)
 
   if (strict && (newSource === source)) {
     throw new Error('Replace failed (strict mode) : ' + options.search + ' → ' + options.replace)