chore: refactor backend around domain types (#26)

Reviewed-on: #26

crates/signed_ui/src/lib.rs

@@ -11,7 +11,6 @@ mod title_bar;
 mod tree_row;
 
 pub mod copy_row;
-pub mod util;
 
 pub use avatar::Avatar;
 pub use copy_row::{copy_row, menu_copy_row};
@@ -25,4 +24,3 @@ pub use setting::{SelectOption, setting_block, setting_row};
 pub use status_badge::status_badge;
 pub use title_bar::title_bar_drag_handlers;
 pub use tree_row::tree_row;
-pub use util::middle_truncate;

crates/signed_ui/src/util.rs

@@ -1,38 +0,0 @@
-/// `[head chars]...[tail chars]` middle truncation.
-///
-/// Values too short for the ellipsis to save space are left alone.
-pub fn middle_truncate(value: &str, head: usize, tail: usize) -> String {
-    let len = value.chars().count();
-    if len <= head + tail + 3 {
-        return value.to_string();
-    }
-    let head: String = value.chars().take(head).collect();
-    let tail: String = value.chars().skip(len - tail).collect();
-    format!("{head}...{tail}")
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn middle_truncates_long_values_only() {
-        assert_eq!(
-            middle_truncate(
-                "a008def15796fba9a0d6fab04e8fd57089285d9fd505da5a83fe8aad57a3564d",
-                10,
-                10,
-            ),
-            "a008def157...ad57a3564d"
-        );
-        assert_eq!(
-            middle_truncate(
-                "30617:a008def15796fba9a0d6fab04e8fd57089285d9fd505da5a83fe8aad57a3564d:ngit",
-                10,
-                10
-            ),
-            "30617:a008...3564d:ngit"
-        );
-        assert_eq!(middle_truncate("short", 10, 10), "short");
-    }
-}