refactor errors into map_err

axum_server/src/pages/post.rs

@@ -21,7 +21,7 @@ pub struct PostMetadata {
 #[template(path = "post.html")]
 pub struct PostTemplate {
     pub title: String,
-    pub content: String,
+    pub body: String,
 }
 
 pub async fn render_post(Path(post_id): Path<String>) -> Result<PostTemplate, StatusCode> {
@@ -29,6 +29,6 @@ pub async fn render_post(Path(post_id): Path<String>) -> Result<PostTemplate, St
     let parsed = parse_post::<PostMetadata>(&path).await?;
     Ok(PostTemplate {
         title: parsed.metadata.title,
-        content: parsed.content,
+        body: parsed.body,
     })
 }

axum_server/src/pages/post_list.rs

@@ -16,18 +16,12 @@ pub struct PostListTemplate {
 
 pub async fn render_post_list() -> Result<PostListTemplate, StatusCode> {
     let path = "../_posts/blog/";
-    let dir = read_dir(path).await;
+    let mut dir = read_dir(path)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
     let mut posts: Vec<ParseResult<PostMetadata>> = Vec::new();
 
-    let mut files = match dir {
-        Err(_reason) => {
-            // TODO find the real reason
-            return Err(StatusCode::INTERNAL_SERVER_ERROR);
-        }
-        Ok(files) => files,
-    };
-
-    while let Some(file) = files
+    while let Some(file) = dir
         .next_entry()
         .await
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?

axum_server/src/post_parser.rs

@@ -20,22 +20,17 @@ where
 }
 
 pub struct ParseResult<Metadata> {
-    pub content: String,
+    pub body: String,
     pub metadata: Metadata,
 }
 
 pub async fn parse_post<'de, Metadata: DeserializeOwned>(
     path: &str,
 ) -> Result<ParseResult<Metadata>, StatusCode> {
-    let contents = fs::read_to_string(path).await;
-
-    let raw_content = match contents {
-        Err(_reason) => {
-            // TODO find the real reason
-            return Err(StatusCode::NOT_FOUND);
-        }
-        Ok(content) => content,
-    };
+    let file_contents = fs::read_to_string(path)
+        .await
+        // TODO Proper reasoning for an error
+        .map_err(|_| StatusCode::NOT_FOUND)?;
 
     let markdown_options = Options {
         parse: ParseOptions {
@@ -52,28 +47,21 @@ pub async fn parse_post<'de, Metadata: DeserializeOwned>(
         ..Default::default()
     };
 
-    let parsed = to_html_with_options(&raw_content, &markdown_options);
-    let content = match parsed {
-        Err(reason) => {
+    let body = to_html_with_options(&file_contents, &markdown_options).map_err(|reason| {
         tracing::error!(reason);
-            return Err(StatusCode::INTERNAL_SERVER_ERROR);
-        }
-        Ok(content) => content,
-    };
+        return StatusCode::INTERNAL_SERVER_ERROR;
+    })?;
 
     let matter = Matter::<YAML>::new();
-    let parsed_metadata = matter.parse_with_struct::<Metadata>(&raw_content);
-
-    let metadata = match parsed_metadata {
-        None => {
+    let metadata = matter
+        .parse_with_struct::<Metadata>(&file_contents)
+        .ok_or_else(|| {
             tracing::error!("Failed to parse metadata");
-            return Err(StatusCode::INTERNAL_SERVER_ERROR);
-        }
-        Some(metadata) => metadata,
-    };
+            return StatusCode::INTERNAL_SERVER_ERROR;
+        })?;
 
     return Ok(ParseResult {
-        content,
+        body,
         metadata: metadata.data,
     });
 }

axum_server/templates/post.html

@@ -5,7 +5,7 @@
 {% block content %}
 <h1>{{title}}</h1>
 
-<article>{{content|escape("none")}}</article>
+<article>{{body|escape("none")}}</article>
 
 {# footer #}
 {% endblock %}