add prototype of highscore list

src/game.rs

@@ -15,6 +15,7 @@ async fn index(State(backend): State<Arc<Backend>>, cookies: CookieJar) -> Respo
 
     let sightings = backend.sightings_for_client(&client).await;
     let amount_total_cameras = backend.amount_total_cameras().await;
+    let highscore = backend.highscore().await;
 
     let markup = new(html! {
         hgroup {
@@ -29,15 +30,20 @@ async fn index(State(backend): State<Arc<Backend>>, cookies: CookieJar) -> Respo
         p {
             mark { "TODO: Show optional REGISTER-NAME message" }
         }
+        p { "You have found " (sightings.len()) "/" (amount_total_cameras) " cameras." }
         p {
-            "You have found "
-            (sightings.len())
-            "/"
-            (amount_total_cameras)
-            " cameras."
-        }
-        p {
-            mark { "TODO: High score" }
+            h2 { "Highscore" }
+            ul {
+                @for rank in highscore {
+                    li {
+                        @if rank.uuid == client.uuid { (PreEscaped("<mark>")) }
+                        @if let Some(name) = rank.name { (name) } @else { "Anonymer Bär" }
+                        @if rank.uuid == client.uuid { (PreEscaped("</mark>")) }
+                        (PreEscaped("&rarr;"))
+                        (rank.amount)
+                    }
+                }
+            }
         }
     });
 

src/model/highscore.rs

@@ -0,0 +1,28 @@
+use crate::Backend;
+
+pub(crate) struct Rank {
+    pub(crate) name: Option<String>,
+    pub(crate) uuid: String,
+    pub(crate) amount: i64,
+}
+
+impl Backend {
+    pub(crate) async fn highscore(&self) -> Vec<Rank> {
+        match self {
+            Backend::Sqlite(db) => sqlx::query_as!(
+                Rank,
+                "SELECT 
+                    c.name,
+                    c.uuid,
+                    COUNT(s.client_uuid) as amount
+                FROM client c
+                LEFT JOIN sightings s ON c.uuid = s.client_uuid
+                GROUP BY c.uuid, c.name
+                ORDER BY amount DESC"
+            )
+            .fetch_all(db)
+            .await
+            .unwrap_or_default(),
+        }
+    }
+}

src/model/mod.rs

@@ -1,3 +1,4 @@
 pub(crate) mod camera;
 pub(crate) mod client;
+pub(crate) mod highscore;
 pub(crate) mod sighting;