From 676ec0238024e0597fd54ecbdf3c4fbf76420bc7 Mon Sep 17 00:00:00 2001
From: mike12345567 <me@michaeldrury.co.uk>
Date: Tue, 15 Feb 2022 14:48:32 +0000
Subject: [PATCH] Fix for safari, removing all usage of regex lookbehinds.

---
 packages/client/package.json               |  2 --
 packages/string-templates/src/index.js     |  5 ++---
 packages/string-templates/src/utilities.js | 20 +++++++++++++++++++-
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/packages/client/package.json b/packages/client/package.json
index fdf0125afa..cf12724e18 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -41,8 +41,6 @@
     "@spectrum-css/vars": "^3.0.1",
     "apexcharts": "^3.22.1",
     "dayjs": "^1.10.5",
-    "fs-extra": "^8.1.0",
-    "jsdom": "^16.0.1",
     "postcss": "^8.2.10",
     "rollup": "^2.44.0",
     "rollup-plugin-json": "^4.0.0",
diff --git a/packages/string-templates/src/index.js b/packages/string-templates/src/index.js
index 7996bb9f1f..c0b5563f3d 100644
--- a/packages/string-templates/src/index.js
+++ b/packages/string-templates/src/index.js
@@ -3,7 +3,7 @@ const { registerAll, registerMinimum } = require("./helpers/index")
 const processors = require("./processors")
 const { atob, btoa } = require("./utilities")
 const manifest = require("../manifest.json")
-const { FIND_HBS_REGEX, FIND_DOUBLE_HBS_REGEX } = require("./utilities")
+const { FIND_HBS_REGEX, findDoubleHbsInstances } = require("./utilities")
 
 const hbsInstance = handlebars.create()
 registerAll(hbsInstance)
@@ -135,8 +135,7 @@ module.exports.processStringSync = (string, context, opts) => {
  * @param string the string to have double HBS statements converted to triple.
  */
 module.exports.disableEscaping = string => {
-  let regexp = new RegExp(FIND_DOUBLE_HBS_REGEX)
-  const matches = string.match(regexp)
+  const matches = findDoubleHbsInstances(string)
   if (matches == null) {
     return string
   }
diff --git a/packages/string-templates/src/utilities.js b/packages/string-templates/src/utilities.js
index 9704f84ecc..0572350d62 100644
--- a/packages/string-templates/src/utilities.js
+++ b/packages/string-templates/src/utilities.js
@@ -1,7 +1,25 @@
 const ALPHA_NUMERIC_REGEX = /^[A-Za-z0-9]+$/g
 
 module.exports.FIND_HBS_REGEX = /{{([^{].*?)}}/g
-module.exports.FIND_DOUBLE_HBS_REGEX = /(?<!{){{[^{}]+}}(?!})/g
+module.exports.FIND_TRIPLE_HBS_REGEX = /{{{([^{].*?)}}}/g
+
+// originally this could be done with a single regex using look behinds
+// but safari does not support this feature
+// original regex: /(?<!{){{[^{}]+}}(?!})/g
+module.exports.findDoubleHbsInstances = string => {
+  let copied = string
+  const doubleRegex = new RegExp(exports.FIND_HBS_REGEX)
+  const regex = new RegExp(exports.FIND_TRIPLE_HBS_REGEX)
+  const tripleMatches = copied.match(regex)
+  // remove triple braces
+  if (tripleMatches) {
+    tripleMatches.forEach(match => {
+      copied = copied.replace(match, "")
+    })
+  }
+  const doubleMatches = copied.match(doubleRegex)
+  return doubleMatches ? doubleMatches : []
+}
 
 module.exports.isAlphaNumeric = char => {
   return char.match(ALPHA_NUMERIC_REGEX)