From 7c9ebed93f09a7188bc43173e8f8f0aa79b041bc Mon Sep 17 00:00:00 2001
From: Oscar Hinton <oscar@oscarhinton.com>
Date: Thu, 8 Jul 2021 16:54:11 +0200
Subject: [PATCH] Add support for emojis in Avatar (#1074)

---
 jslib                                  |  2 +-
 src/app/components/avatar.component.ts | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/jslib b/jslib
index 119699b82c..75fff66f98 160000
--- a/jslib
+++ b/jslib
@@ -1 +1 @@
-Subproject commit 119699b82c26296cdd518c0c66e0cd3d61586309
+Subproject commit 75fff66f98e3d174baf369afbb747c1380fad4d4
diff --git a/src/app/components/avatar.component.ts b/src/app/components/avatar.component.ts
index 83e05ed8c6..1760c521f2 100644
--- a/src/app/components/avatar.component.ts
+++ b/src/app/components/avatar.component.ts
@@ -58,7 +58,12 @@ export class AvatarComponent implements OnChanges, OnInit {
                 chars = this.getFirstLetters(upperData, this.charCount);
             }
             if (chars == null) {
-                chars = upperData.substr(0, this.charCount);
+                chars = this.unicodeSafeSubstring(upperData, this.charCount);
+            }
+
+            // If the chars contain an emoji, only show it.
+            if (chars.match(Utils.regexpEmojiPresentation)) {
+                chars = chars.match(Utils.regexpEmojiPresentation)[0];
             }
 
             const charObj = this.getCharText(chars);
@@ -91,7 +96,7 @@ export class AvatarComponent implements OnChanges, OnInit {
         if (parts.length > 1) {
             let text = '';
             for (let i = 0; i < count; i++) {
-                text += parts[i].substr(0, 1);
+                text += this.unicodeSafeSubstring(parts[i], 1);
             }
             return text;
         }
@@ -125,4 +130,9 @@ export class AvatarComponent implements OnChanges, OnInit {
         textTag.style.fontSize = this.fontSize + 'px';
         return textTag;
     }
+
+    private unicodeSafeSubstring(str: string, count: number) {
+        const characters = str.match(/./ug);
+        return characters != null ? characters.slice(0, count).join('') : '';
+    }
 }