Add Store::save_to() to create a copy of an entry

libimagstore/src/store.rs

@@ -607,6 +607,27 @@ impl Store {
             .map_err(|e| SEK::DeleteCallError.into_error_with_cause(e))
     }
 
+    /// Save a copy of the Entry in another place
+    /// Executes the post_move_aspects for the new id
+    pub fn save_to(&self, entry: &FileLockEntry, new_id: StoreId) -> Result<()> {
+        use std::fs::copy;
+
+        let new_id = self.storify_id(new_id);
+        let hsmap = self.entries.write();
+        if hsmap.is_err() {
+            return Err(StoreError::new(StoreErrorKind::LockPoisoned, None))
+        }
+        if hsmap.unwrap().contains_key(&new_id) {
+            return Err(StoreError::new(StoreErrorKind::EntryAlreadyExists, None))
+        }
+
+        let old_id = entry.get_location().clone();
+
+        copy(old_id.clone(), new_id.clone())
+            .map_err(|e| StoreError::new(StoreErrorKind::FileError, Some(Box::new(e))))
+            .and_then(|_| self.execute_hooks_for_id(self.post_move_aspects.clone(), &new_id))
+    }
+
     /// Save an Entry in another place
     /// Removes the original entry
     /// Executes the post_move_aspects for the new id