profiles: introduce DisplayNames

This is exactly the same as the DisplayName enum in Damus iOS. Due to
the various inconsistencies in `name` and `display_name` between
clients, we have to generalize DisplayName into two variants: one name
or two names.

If we have two names, we treat it in the standard way of display_name is
the real name, and `name` is the username.

If only one is set, then it is considered both the username and "real name".

Signed-off-by: William Casarin <jb55@jb55.com>

src/lib.rs

@@ -31,6 +31,7 @@ mod test_utils;
 
 pub use app::Damus;
 pub use error::Error;
+pub use profile::DisplayName;
 
 #[cfg(target_os = "android")]
 use winit::platform::android::EventLoopBuilderExtAndroid;

src/profile.rs

@@ -1,17 +1,39 @@
 use nostrdb::ProfileRecord;
 
-pub fn get_profile_name<'a>(record: &'a ProfileRecord) -> Option<&'a str> {
-    let profile = record.record().profile()?;
-    let display_name = profile.display_name();
-    let name = profile.name();
+pub enum DisplayName<'a> {
+    One(&'a str),
 
-    if display_name.is_some() && display_name.unwrap() != "" {
-        return display_name;
-    }
-
-    if name.is_some() && name.unwrap() != "" {
-        return name;
-    }
-
-    None
+    Both {
+        username: &'a str,
+        display_name: &'a str,
+    },
+}
+
+impl<'a> DisplayName<'a> {
+    pub fn username(&self) -> &'a str {
+        match self {
+            Self::One(n) => n,
+            Self::Both { username, .. } => username,
+        }
+    }
+}
+
+fn is_empty(s: &str) -> bool {
+    s.chars().all(|c| c.is_whitespace())
+}
+
+pub fn get_profile_name<'a>(record: &'a ProfileRecord) -> Option<DisplayName<'a>> {
+    let profile = record.record().profile()?;
+    let display_name = profile.display_name().filter(|n| !is_empty(n));
+    let name = profile.name().filter(|n| !is_empty(n));
+
+    match (display_name, name) {
+        (None, None) => None,
+        (Some(disp), None) => Some(DisplayName::One(disp)),
+        (None, Some(username)) => Some(DisplayName::One(username)),
+        (Some(display_name), Some(username)) => Some(DisplayName::Both {
+            display_name,
+            username,
+        }),
+    }
 }

src/ui/note/contents.rs

@@ -129,19 +129,17 @@ fn render_note_contents(
                             let name: String = if let Some(name) =
                                 profile.as_ref().and_then(crate::profile::get_profile_name)
                             {
-                                format!("@{}", name)
+                                format!("@{}", name.username())
                             } else {
-                                "@nostrich".to_string()
+                                "??".to_string()
                             };
 
                             let resp = ui.colored_label(colors::PURPLE, &name);
 
                             if let Some(rec) = profile.as_ref() {
                                 resp.on_hover_ui_at_pointer(|ui| {
-                                    egui::Frame::default().show(ui, |ui| {
-                                        ui.set_max_width(300.0);
-                                        ui.add(ui::ProfilePreview::new(rec));
-                                    });
+                                    ui.set_max_width(300.0);
+                                    ui.add(ui::ProfilePreview::new(rec));
                                 });
                             }
                         });

src/ui/profile/preview.rs

@@ -1,5 +1,6 @@
 use crate::app_style::NotedeckTextStyle;
 use crate::images;
+use crate::DisplayName;
 use egui::load::TexturePoll;
 use egui::{RichText, Sense};
 use egui_extras::Size;
@@ -58,14 +59,29 @@ impl<'a> ProfilePreview<'a> {
         }
     }
 
-    fn body(ui: &mut egui::Ui, profile: &ProfileRecord<'_>) -> egui::Response {
+    fn body(ui: &mut egui::Ui, profile: &ProfileRecord<'_>) {
         let name = if let Some(name) = crate::profile::get_profile_name(profile) {
             name
         } else {
-            "nostrich"
+            DisplayName::One("??")
         };
 
-        ui.label(RichText::new(name).text_style(NotedeckTextStyle::Heading3.text_style()))
+        match name {
+            DisplayName::One(n) => {
+                ui.label(RichText::new(n).text_style(NotedeckTextStyle::Heading3.text_style()));
+            }
+
+            DisplayName::Both {
+                display_name,
+                username,
+            } => {
+                ui.label(
+                    RichText::new(display_name)
+                        .text_style(NotedeckTextStyle::Heading3.text_style()),
+                );
+                ui.label(RichText::new(format!("@{}", username)));
+            }
+        }
     }
 }