feat(i18n): allow pluralization

src/web/templates.rs

@@ -21,12 +21,32 @@ impl Tr {
         crate::web::i18n::LOCALES.lookup(&self.lang, key)
     }
 
+    /// Translate a pluralized message. Passes `$count` as a number so Fluent
+    /// plural selectors (`[one]` / `[other]`, etc.) resolve correctly.
+    pub fn tn(&self, key: &str, count: &usize) -> String {
+        let args = std::collections::HashMap::from([("count", fluent::FluentValue::from(count))]);
+        crate::web::i18n::LOCALES.lookup_with_args(&self.lang, key, &args)
+    }
+
     #[cfg(feature = "server")]
     pub fn lang_string(&self) -> String {
         self.lang.to_string()
     }
 }
 
+#[cfg(test)]
+mod tr_tests {
+    use super::*;
+    use unic_langid::langid;
+
+    #[test]
+    fn recipes_count_pluralizes() {
+        let tr = Tr::new(langid!("en-US"));
+        assert_eq!(tr.tn("recipes-count", &1), "1 recipe");
+        assert_eq!(tr.tn("recipes-count", &3), "3 recipes");
+    }
+}
+
 mod filters {
     use askama::Result;
     use url::Url;

templates/recipes.html

@@ -76,7 +76,7 @@ <h2 class="text-xl font-bold">{{ tr.t("todays-menu-title") }}</h2>
                 <h3 class="font-bold text-lg mb-2">{{ item.name }}</h3>
                 {% match item.count %}
                 {% when Some with (count) %}
-                <span class="text-sm text-orange-600 font-medium">{{ count }} recipes</span>
+                <span class="text-sm text-orange-600 font-medium">{{ tr.tn("recipes-count", count) }}</span>
                 {% when None %}
                 {% endmatch %}
             </div>