refactor: replace IntoServiceError trait with direct ServiceError conversions

Reviewed-on: #8

apps/api/src/errors/service_error.rs

@@ -1,15 +1,23 @@
-pub type ServiceError = Box<dyn std::error::Error + Send + Sync>;
+use sea_orm::DbErr;
 
-#[allow(dead_code)] // TODO: remove when used
-pub trait IntoServiceError {
-    fn into_service_error(self) -> ServiceError;
+pub enum ServiceError {
+    NotFound(String),
+    DatabaseError(String),
+    Unauthorized(String),
+    InternalError(String),
 }
 
-impl<T> IntoServiceError for T
-where
-    T: std::error::Error + Send + Sync + 'static,
-{
-    fn into_service_error(self) -> ServiceError {
-        Box::new(self)
+impl From<Box<dyn std::error::Error + Send + Sync + 'static>> for ServiceError {
+    fn from(err: Box<dyn std::error::Error + Send + Sync + 'static>) -> Self {
+        ServiceError::InternalError(err.to_string())
+    }
+}
+
+impl From<DbErr> for ServiceError {
+    fn from(err: DbErr) -> Self {
+        match err {
+            DbErr::RecordNotFound(msg) => ServiceError::NotFound(msg),
+            _ => ServiceError::DatabaseError(err.to_string()),
+        }
     }
 }

apps/api/src/services/settings.rs

@@ -7,7 +7,7 @@ use sea_orm::{
     IntoActiveModel, QueryFilter,
 };
 
-use crate::errors::service_error::{IntoServiceError, ServiceError};
+use crate::errors::service_error::ServiceError;
 
 #[async_trait::async_trait]
 pub trait SettingsStore: Send + Sync {
@@ -37,11 +37,11 @@ impl SettingsStore for SettingsService {
             .await;
 
         match setting {
-            Err(err) => Err(err.into_service_error()),
-            Ok(None) => Err(
-                DbErr::RecordNotFound(format!("Setting with key '{}' not found", key))
-                    .into_service_error(),
-            ),
+            Err(err) => Err(ServiceError::from(err)),
+            Ok(None) => Err(ServiceError::from(DbErr::RecordNotFound(format!(
+                "Setting with key '{}' not found",
+                key
+            )))),
             Ok(Some(record)) => Ok(record.value),
         }
     }
@@ -62,7 +62,7 @@ impl SettingsStore for SettingsService {
             new_record
                 .insert(&*self.connection)
                 .await
-                .map_err(|err| err.into_service_error())
+                .map_err(ServiceError::from)
         };
 
         match existing {
@@ -71,7 +71,7 @@ impl SettingsStore for SettingsService {
                     handle_not_found(key.to_string(), value).await?;
                 }
                 _ => {
-                    return Err(Box::new(err));
+                    return Err(ServiceError::from(err));
                 }
             },
             Ok(None) => {
@@ -83,7 +83,7 @@ impl SettingsStore for SettingsService {
                     .into_active_model()
                     .update(&*self.connection)
                     .await
-                    .map_err(|err| err.into_service_error())?;
+                    .map_err(ServiceError::from)?;
             }
         }