Use color-element in mentions.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>

NextcloudTalk/NCAppBranding.h

@@ -44,6 +44,7 @@ extern BOOL const customNavigationLogo;
 + (UIColor *)brandTextColor;
 + (UIColor *)themeColor;
 + (UIColor *)themeTextColor;
++ (UIColor *)elementColor;
 + (NSString *)navigationLogoImageName;
 + (UIColor *)placeholderColor;
 + (UIStatusBarStyle)statusBarStyleForBrandColor;

NextcloudTalk/NCAppBranding.m

@@ -87,6 +87,19 @@ BOOL const useServerThemimg = YES;
     return textColor;
 }
 
++ (UIColor *)elementColor
+{
+    UIColor *elementColor = [NCUtils colorFromHexString:brandColorHex];
+    // Do not check if using server theming or not for now
+    // We could check it once we calculate color element locally
+    TalkAccount *activeAccount = [[NCDatabaseManager sharedInstance] activeAccount];
+    ServerCapabilities *serverCapabilities = [[NCDatabaseManager sharedInstance] serverCapabilitiesForAccountId:activeAccount.accountId];
+    if (serverCapabilities && ![serverCapabilities.colorElement isEqualToString:@""]) {
+        elementColor = [NCUtils colorFromHexString:serverCapabilities.colorElement];
+    }
+    return elementColor;
+}
+
 + (NSString *)navigationLogoImageName
 {
     NSString *imageName = @"navigationLogo";

NextcloudTalk/NCChatMessage.m

@@ -199,7 +199,7 @@ NSInteger const kChatMessageGroupTimeDifference = 30;
         //Set color for mentions
         if ([param.type isEqualToString:@"user"] || [param.type isEqualToString:@"guest"] || [param.type isEqualToString:@"call"]) {
             UIColor *defaultColor = [UIColor darkGrayColor];
-            UIColor *highlightedColor = [NCAppBranding themeColor];
+            UIColor *highlightedColor = [NCAppBranding elementColor];
             [attributedMessage addAttribute:NSForegroundColorAttributeName value:(param.shouldBeHighlighted) ? highlightedColor : defaultColor range:param.range];
             [attributedMessage addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:16.0f] range:param.range];
         }