added first version of try_audit! macro #32

Add try_audit macro

src/lib/audit.rs

@@ -52,6 +52,19 @@ macro_rules! audit_segment {
     }};
 }
 
+
+macro_rules! try_audit {
+    ($audit:ident, $result:expr, $logFormat:expr, $errorType:expr) => {
+        match $result {
+            Ok(v) => v,
+            Err(e) => {
+                audit_log!($audit, $logFormat, e);
+                return Err($errorType);
+            }
+        }       
+    };
+}
+
 #[derive(Serialize, Deserialize)]
 enum AuditEvent {
     Log(AuditLog),

src/lib/be/mod.rs

@@ -391,13 +391,8 @@ impl BackendWriteTransaction {
             .conn
             .backup(rusqlite::DatabaseName::Main, dstPath, None);
 
-        match result {
-            Ok(_) => Ok(()),
-            Err(e) => {
-                audit_log!(audit, "Error in sqlite {:?}", e);
-                Err(OperationError::SQLiteError)
-            }
-        }
+        try_audit!(audit, result, "Error in sqlite {:?}", OperationError::SQLiteError);
+        Ok(())
     }
 
     // Should this be offline only?