feat: find file directly, regardless of filters

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "custard"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 license = "MIT"
 description = "A frontmatter-querying server"

src/route/frontmatter_file.rs

@@ -124,11 +124,12 @@ fn post_inner(
 ) -> Result<(HeaderMap, String), StatusCode> {
     let keeper = lock_keeper(files)?;
 
-    let mut files = keeper.files().collect::<Vec<_>>();
+    let files = keeper.files().collect::<Vec<_>>();
 
-    sort_with_params(params, &mut files);
+    let mut filtered_files =
+        query_files(files.clone().into_iter(), query, Some(name)).collect::<Vec<_>>();
 
-    let filtered_files = query_files(files.clone().into_iter(), query).collect::<Vec<_>>();
+    sort_with_params(params, &mut filtered_files);
 
     let (i, file) = find_file_and_index(&filtered_files, name)?;
 
@@ -354,5 +355,19 @@ mod test {
             .unwrap();
         assert_eq!(None, prev_file_name);
         assert_eq!(Some("about.md"), next_file_name);
+
+        let (headers, _) = post_inner(&keeper, &params, "something.md", &query).unwrap();
+        let next_file_name = headers
+            .get("x-next-file")
+            .map(|h| h.to_str())
+            .transpose()
+            .unwrap();
+        let prev_file_name = headers
+            .get("x-prev-file")
+            .map(|h| h.to_str())
+            .transpose()
+            .unwrap();
+        assert_eq!(Some("about.md"), prev_file_name);
+        assert_eq!(None, next_file_name);
     }
 }

src/route/frontmatter_list.rs

@@ -73,7 +73,7 @@ fn post_inner(
 
     let files = keeper.files();
 
-    let mut filtered_files = query_files(files, query)
+    let mut filtered_files = query_files(files, query, None)
         .map(|file| file.clone().into())
         .collect::<Vec<_>>();
 

src/route/mod.rs

@@ -14,8 +14,14 @@ use crate::{
 fn query_files<'a>(
     files: impl Iterator<Item = &'a FrontmatterFile>,
     query: &'a FrontmatterQuery,
+    name: Option<&'a str>,
 ) -> impl Iterator<Item = &'a FrontmatterFile> {
-    files.filter(|file| {
+    files.filter(move |file| {
+        if let Some(name) = name {
+            if file.name == name {
+                return true;
+            }
+        }
         let Some(frontmatter) = file.frontmatter() else {
             // if query is '{}', include this
             return query.is_empty();