[fractal/fractal-next] Refactor displayname and fix avatar_url

[Julian Sparber <jsparber src gnome org>]

commit a680a4e52d56381101c7d16c759282bdfbf38602
Author: Kévin Commaille <zecakeh tedomum fr>
Date:   Tue May 18 16:01:11 2021 +0200

    Refactor displayname and fix avatar_url

 src/session/content/state_row.rs | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)
---
diff --git a/src/session/content/state_row.rs b/src/session/content/state_row.rs
index ce476cf3..fda1bea9 100644
--- a/src/session/content/state_row.rs
+++ b/src/session/content/state_row.rs
@@ -74,31 +74,30 @@ impl StateRow {
                             Some(AnyStateEventContent::RoomMember(prev))
                                 if event.displayname != prev.displayname =>
                             {
-                                if prev.displayname == None {
+                                if let Some(prev_name) = prev.displayname {
+                                    if event.displayname == None {
+                                        Some(gettext!("{} removed their display name.", prev_name))
+                                    } else {
+                                        Some(gettext!(
+                                            "{} changed their display name to {}.",
+                                            prev_name,
+                                            display_name
+                                        ))
+                                    }
+                                } else {
                                     Some(gettext!(
                                         "{} set their display name to {}.",
                                         state.state_key(),
                                         display_name
                                     ))
-                                } else if event.displayname == None {
-                                    Some(gettext!(
-                                        "{} removed their display name.",
-                                        prev.displayname.unwrap()
-                                    ))
-                                } else {
-                                    Some(gettext!(
-                                        "{} changed their display name to {}.",
-                                        prev.displayname.unwrap(),
-                                        display_name
-                                    ))
                                 }
                             }
                             Some(AnyStateEventContent::RoomMember(prev))
                                 if event.avatar_url != prev.avatar_url =>
                             {
-                                if prev.displayname == None {
+                                if prev.avatar_url == None {
                                     Some(gettext!("{} set their avatar.", display_name))
-                                } else if event.displayname == None {
+                                } else if event.avatar_url == None {
                                     Some(gettext!("{} removed their avatar.", display_name))
                                 } else {
                                     Some(gettext!("{} changed their avatar.", display_name))
@@ -113,6 +112,7 @@ impl StateRow {
                         gettext!("{} was invited to this room.", display_name)
                     }
                     MembershipState::Knock => {
+                        // TODO: Add button to invite the user.
                         gettext!("{} requested to be invited to this room.", display_name)
                     }
                     MembershipState::Leave => {