refactor out meta_str_to_map

src/main.rs

@@ -46,6 +46,21 @@ pub enum Error {
     FS,
 }
 
+fn meta_str_to_map(from: &str) -> Result<HashMap<&str, String>, Error> {
+    let map = from
+        .lines()
+        .map(|line| line.trim())
+        .filter(|line| line.len() > 0)
+        .map(|line| {
+            line.split_once(": ")
+                .ok_or(Error::Metadata)
+                .and_then(|(k, v)| Ok((k, v.to_string())))
+        })
+        .collect::<Result<HashMap<_, _>, Error>>()?;
+
+    Ok(map)
+}
+
 struct TextPaste {
     pub text: String,
     pub meta: TextMeta,
@@ -57,16 +72,7 @@ struct TextMeta {
 
 impl TextMeta {
     pub fn parse(from: &str) -> Result<Self, Error> {
-        let mut map = HashMap::new();
-
-        from.lines()
-            .map(|line| line.trim())
-            .filter(|line| line.len() > 0)
-            .map(|line| {
-                line.split_once(": ")
-                    .ok_or(Error::Metadata)
-                    .map(|(k, v)| map.insert(k.to_string(), v.to_string()))
-            });
+        let map = meta_str_to_map(from)?;
         // meh, this prolly doesnt perform well but idc its only init code
         Ok(Self {
             language: map.remove("language"),
@@ -80,14 +86,9 @@ struct FileMeta {
 
 impl FileMeta {
     pub fn parse(from: &str) -> Result<Self, Error> {
-        let map = from
-            .lines()
-            .map(|line| line.trim())
-            .filter(|line| line.len() > 0)
-            .map(|line| line.split_once(": ").ok_or(Error::Metadata))
-            .collect::<Result<HashMap<_, _>, Error>>()?;
-
-        let file_name = map.remove("file_name").ok_or(Error::Metadata)?.to_string();
+        let map = meta_str_to_map(from)?;
+
+        let file_name = map.remove("file_name").ok_or(Error::Metadata)?;
         Ok(Self { file_name })
     }
 }