From f7a19cab866735c8485a25bad4d7abc817d066dd Mon Sep 17 00:00:00 2001
From: Aswin S <mr.aswin@gmail.com>
Date: Tue, 23 Jan 2024 09:50:32 +0530
Subject: [PATCH] fix: common suffix length calculation

---
 src/libs/ComposerUtils/index.ts                             | 6 ++++--
 .../ComposerWithSuggestions/ComposerWithSuggestions.js      | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/libs/ComposerUtils/index.ts b/src/libs/ComposerUtils/index.ts
index 54af287a67b7..c0e01e3e751b 100644
--- a/src/libs/ComposerUtils/index.ts
+++ b/src/libs/ComposerUtils/index.ts
@@ -38,11 +38,13 @@ function canSkipTriggerHotkeys(isSmallScreenWidth: boolean, isKeyboardShown: boo
  * Finds the length of common suffix between two texts
  * @param str1 - first string to compare
  * @param str2 - next string to compare
+ * @param cursorPosition - position of cursor
  * @returns number - Length of the common suffix
  */
-function findCommonSuffixLength(str1: string, str2: string) {
+function findCommonSuffixLength(str1: string, str2: string, cursorPosition: number) {
     let commonSuffixLength = 0;
-    const minLength = Math.min(str1.length, str2.length);
+    const minLength = Math.min(str1.length - cursorPosition, str2.length);
+
     for (let i = 1; i <= minLength; i++) {
         if (str1.charAt(str1.length - i) === str2.charAt(str2.length - i)) {
             commonSuffixLength++;
diff --git a/src/pages/home/report/ReportActionCompose/ComposerWithSuggestions/ComposerWithSuggestions.js b/src/pages/home/report/ReportActionCompose/ComposerWithSuggestions/ComposerWithSuggestions.js
index 0706fa4fc8e2..90738c66579c 100644
--- a/src/pages/home/report/ReportActionCompose/ComposerWithSuggestions/ComposerWithSuggestions.js
+++ b/src/pages/home/report/ReportActionCompose/ComposerWithSuggestions/ComposerWithSuggestions.js
@@ -213,7 +213,7 @@ function ComposerWithSuggestions({
 
             if (currentIndex < newText.length) {
                 startIndex = currentIndex;
-                const commonSuffixLength = ComposerUtils.findCommonSuffixLength(prevText, newText);
+                const commonSuffixLength = ComposerUtils.findCommonSuffixLength(prevText, newText, selection.end);
                 // if text is getting pasted over find length of common suffix and subtract it from new text length
                 if (commonSuffixLength > 0 || selection.end - selection.start > 0) {
                     endIndex = newText.length - commonSuffixLength;
@@ -228,7 +228,7 @@ function ComposerWithSuggestions({
                 diff: newText.substring(startIndex, endIndex),
             };
         },
-        [selection.end, selection.start],
+        [selection.start, selection.end],
     );
 
     /**