refactor(db): better impls for UNode/UHierPath

db/src/hierarchies.rs

@@ -17,21 +17,21 @@ use super::UpEndConnection;
 #[derive(Debug, Clone, Eq, PartialEq, Hash)]
 pub struct UNode(String);
 
-impl UNode {
-    pub fn new<T: Into<String>>(s: T) -> Result<Self> {
-        let s = s.into();
+impl std::str::FromStr for UNode {
+    type Err = anyhow::Error;
 
-        if s.is_empty() {
-            return Err(anyhow!("UNode can not be empty."));
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        if string.is_empty() {
+            Err(anyhow!("UNode can not be empty."))
+        } else {
+            Ok(Self(string.to_string()))
         }
-
-        Ok(Self(s))
     }
 }
 
-impl From<UNode> for String {
-    fn from(value: UNode) -> Self {
-        value.0
+impl std::fmt::Display for UNode {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
     }
 }
 
@@ -48,7 +48,7 @@ impl std::str::FromStr for UHierPath {
             let result: Result<Vec<UNode>> = string
                 .trim_end_matches('/')
                 .split('/')
-                .map(|part| UNode::new(String::from(part)))
+                .map(UNode::from_str)
                 .collect();
 
             Ok(UHierPath(result?))
@@ -56,12 +56,6 @@ impl std::str::FromStr for UHierPath {
     }
 }
 
-impl std::fmt::Display for UNode {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
-
 impl std::fmt::Display for UHierPath {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(
@@ -112,7 +106,7 @@ pub fn fetch_or_create_dir(
         .query(Query::SingleQuery(QueryPart::Matches(PatternQuery {
             entity: QueryComponent::Variable(None),
             attribute: QueryComponent::Exact(ATTR_LABEL.into()),
-            value: QueryComponent::Exact(String::from(directory.clone()).into()),
+            value: QueryComponent::Exact(directory.to_string().into()),
         })))?
         .into_iter()
         .map(|e: Entry| e.entity);
@@ -142,7 +136,7 @@ pub fn fetch_or_create_dir(
                 let directory_entry = Entry {
                     entity: new_directory_address.clone(),
                     attribute: String::from(ATTR_LABEL),
-                    value: String::from(directory).into(),
+                    value: directory.to_string().into(),
                     provenance: "SYSTEM FS".to_string(),
                     timestamp: chrono::Utc::now().naive_utc(),
                 };
@@ -249,10 +243,10 @@ mod tests {
 
     #[test]
     fn test_unode_nonempty() {
-        let node = UNode::new("foobar");
+        let node = "foobar".parse::<UNode>();
         assert!(node.is_ok());
 
-        let node = UNode::new("");
+        let node = "".parse::<UNode>();
         assert!(node.is_err());
     }
 

db/src/stores/fs/mod.rs

@@ -1,7 +1,7 @@
 use self::db::files;
 
 use super::{Blob, StoreError, UpStore, UpdatePathOutcome};
-use crate::hierarchies::{resolve_path, resolve_path_cached, ResolveCache, UHierPath, UNode};
+use crate::hierarchies::{resolve_path, resolve_path_cached, ResolveCache, UHierPath};
 use crate::jobs::{JobContainer, JobHandle};
 use crate::util::hash_at_path;
 use crate::{ConnectionOptions, LoggingHandler, UpEndConnection, UpEndDatabase, UPEND_SUBDIR};
@@ -435,10 +435,12 @@ impl FsStore {
         let (filename, dir_path) = components.split_last().unwrap();
 
         let upath = UHierPath(
-            iter::once(UNode::new("NATIVE").unwrap())
-                .chain(dir_path.iter().map(|component| {
-                    UNode::new(component.as_os_str().to_string_lossy().to_string()).unwrap()
-                }))
+            iter::once("NATIVE".parse().unwrap())
+                .chain(
+                    dir_path
+                        .iter()
+                        .map(|component| component.as_os_str().to_string_lossy().parse().unwrap()),
+                )
                 .collect(),
         );
         let resolved_path = match resolve_cache {