failed attempt at clone less caching: argh rust

v0.5/fastn-package/src/reader.rs

@@ -21,7 +21,7 @@ impl fastn_continuation::Continuation for State {
 
     fn continue_after(
         self,
-        _n: Vec<(String, Option<fastn_section::Document>)>,
+        _n: Vec<(String, &Option<fastn_section::Document>)>,
     ) -> fastn_continuation::Result<Self> {
         todo!()
     }

v0.5/fastn/src/lib.rs

@@ -24,11 +24,3 @@ pub enum OutputRequested {
     UI,
     Data,
 }
-
-pub fn full_filler(_i: Vec<String>) -> Vec<(String, Option<fastn_section::Document>)> {
-    todo!()
-}
-
-pub async fn full_filler_async(_i: Vec<String>) -> Vec<(String, Option<fastn_section::Document>)> {
-    todo!()
-}

v0.5/fastn/src/section_provider.rs

@@ -1,12 +1,20 @@
 #[derive(Default)]
-pub struct SectionProvider {}
+pub struct SectionProvider {
+    cache: std::collections::HashMap<String, Option<fastn_section::Document>>,
+}
 
 #[async_trait::async_trait]
-impl fastn_continuation::AsyncMutProvider for &SectionProvider {
+impl<'a> fastn_continuation::AsyncMutProvider for &'a SectionProvider {
     type Needed = Vec<String>;
-    type Found = Vec<(String, Option<fastn_section::Document>)>;
+    type Found = Vec<(String, &'a Option<fastn_section::Document>)>;
 
-    async fn provide(&mut self, _needed: Vec<String>) -> Self::Found {
-        todo!()
+    async fn provide(&mut self, needed: Vec<String>) -> Self::Found {
+        let mut r = vec![];
+        for f in needed {
+            if let Some(doc) = self.cache.get(&f) {
+                r.push((f, doc));
+            }
+        }
+        r
     }
 }