ability to get wallpaper from url

src/main.rs

@@ -44,12 +44,14 @@ fn not_found() -> templates::NotFound<'static> {
     }
 }
 
-#[get("/")]
-fn root() -> templates::Root<'static> {
+#[get("/?<wallpaper>")]
+fn root(wallpaper: Option<&str>) -> templates::Root<'static> {
     templates::Root {
         title: "Philippe Loctaux",
         year: chrono::Utc::now().year(),
-        wallpaper: Wallpaper::random(),
+        wallpaper: wallpaper
+            .and_then(Wallpaper::find)
+            .or_else(Wallpaper::random),
         networks: Network::new(),
         jobs: Job::new(),
         talks: Talk::new(),

src/types.rs

@@ -58,4 +58,8 @@ impl Wallpaper {
 
         WALLPAPERS.get(ChaCha20::new().generate_range(range))
     }
+
+    pub fn find(filename: &str) -> Option<&'static &'static Wallpaper> {
+        WALLPAPERS.iter().find(|w| w.file.contains(filename))
+    }
 }