Improve return type for insert function

server/texture-sync-server/src/model/mod.rs

@@ -22,12 +22,24 @@ pub struct Texture {
 }
 
 pub enum ReplaceTextureStatus {
-    // Done.
+    /// Done.
     Ok,
 
-    // Call Again With Texture Binary
+    /// Call Again With Texture Binary
     NeedTextureData(Sha256),
-
+}
-    // Name or id already in use
+
-    Conflict,
+pub type ProtocolResult<T> = Result<T, ProtocolError>;
+pub enum ProtocolError {
+    BadRequest(String),
+    FileNotFound(String),
+    Conflict(String),
+    InternalServerError(std::io::Error),
+    NotImplemented,
+}
+
+impl From<io::Error> for ProtocolError {
+    fn from(err: io::Error) -> Self {
+        ProtocolError::InternalServerError(err)
+    }
 }

server/texture-sync-server/src/persistency/mod.rs

@@ -75,7 +75,7 @@ impl DataStore {
         &mut self,
         tex: Texture,
         data: Option<Arc<Vec<u8>>>,
-    ) -> io::Result<ReplaceTextureStatus> {
+    ) -> ProtocolResult<ReplaceTextureStatus> {
         use io::Write;
 
         // Check for collisions
@@ -86,7 +86,9 @@ impl DataStore {
             .is_some()
         {
             // Name or id already in use
-            Ok(ReplaceTextureStatus::Conflict)
+            Err(ProtocolError::Conflict(
+                "Name or id is already in use.".to_string(),
+            ))
         } else {
             // Insert it
             if self.has_hash(&tex.texture_hash)? {

server/texture-sync-server/src/protocol/error.rs

@@ -1,10 +1 @@
 use crate::model::*;
-
-pub type ProtocolResult<T> = Result<T, ProtocolError>;
-pub enum ProtocolError {
-    BadRequest(String),
-    FileNotFound(String),
-    Conflict(String),
-    InternalServerError(std::io::Error),
-    NotImplemented,
-}

server/texture-sync-server/src/protocol/implementation/listen_forever.rs

@@ -109,10 +109,6 @@ where
                                         panic!("Contract Violation: handler must not return NeedTextureData \
                                         when data is given.");
                                     }
-                                    Ok(ReplaceTextureStatus::Conflict) => {
-                                        connection
-                                            .send(&Package::Error(409, "Conflict".to_string()))?;
-                                    }
                                     Err(err) => {
                                         connection.send(&Package::from(err))?;
                                     }
@@ -129,9 +125,6 @@ where
                             }
                         }
                     }
-                    Ok(ReplaceTextureStatus::Conflict) => {
-                        connection.send(&Package::Error(409, "Conflict".to_string()))?;
-                    }
                     Err(err) => {
                         connection.send(&Package::from(err))?;
                     }