feat: todo's, add image cache control

src/utils.rs

@@ -0,0 +1,39 @@
+pub mod web {
+    /// Macro shenanigans to format a str at compile time
+    pub macro make_static_cache_header($max_age:expr, $stale_revalidate:expr) {{
+        // type guards lmfao
+        const _: ::std::time::Duration = $max_age;
+        const _: ::std::time::Duration = $stale_revalidate;
+
+        // hopefully ident encapsulation will save my ass here
+        const MAX_AGE: u64 = $max_age.as_secs();
+        const STALE_REVALIDATE: u64 = $stale_revalidate.as_secs();
+
+        const_str::format!(
+            "public, max-age={}, stale-while-revalidate={}",
+            MAX_AGE,
+            STALE_REVALIDATE
+        )
+    }}
+
+    #[cfg(test)]
+    mod test {
+        use std::time::Duration;
+
+        #[test]
+        fn const_concat_worked() {
+            const MA: Duration = Duration::from_mins(15);
+            const SR: Duration = Duration::from_hours(1);
+
+            const NAME: &str = super::make_static_cache_header!(MA, SR);
+            assert_eq!(
+                NAME,
+                format!(
+                    "public, max-age={}, stale-while-revalidate={}",
+                    MA.as_secs(),
+                    SR.as_secs()
+                )
+            );
+        }
+    }
+}