implement edge removal

src/query/db_accessor.cpp

@@ -53,8 +53,10 @@ const std::string &SubgraphDbAccessor::EdgeTypeToName(storage::EdgeTypeId type)
 
 storage::Result<std::optional<EdgeAccessor>> SubgraphDbAccessor::RemoveEdge(EdgeAccessor *edge) {
   auto result = db_accessor_->RemoveEdge(edge);
-  // todo antoniofilipovic remove edge from subgraph
-  return result;
+  if (result.HasError() || !*result) {
+    return result;
+  }
+  return this->graph_->RemoveEdge(*edge);
 }
 
 storage::Result<EdgeAccessor> SubgraphDbAccessor::InsertEdge(SubgraphVertexAccessor *from, SubgraphVertexAccessor *to,
@@ -85,7 +87,6 @@ storage::Result<std::optional<VertexAccessor>> SubgraphDbAccessor::RemoveVertex(
     return result;
   }
   return this->graph_->RemoveVertex(*vertex_accessor);
-  ;
 }
 
 SubgraphVertexAccessor SubgraphDbAccessor::InsertVertex() {

src/query/graph.cpp

@@ -53,6 +53,14 @@ std::optional<VertexAccessor> Graph::RemoveVertex(const VertexAccessor &vertex)
   return vertex;
 }
 
+std::optional<EdgeAccessor> Graph::RemoveEdge(const EdgeAccessor &edge) {
+  auto value = edges_.erase(edge);
+  if (value == 0) {
+    return std::nullopt;
+  }
+  return edge;
+}
+
 std::vector<query::EdgeAccessor> Graph::OutEdges(query::VertexAccessor vertex_accessor) {
   std::vector<query::EdgeAccessor> out_edges;
   for (auto it = edges_.begin(); it != edges_.end(); ++it) {

src/query/graph.hpp

@@ -61,6 +61,7 @@ class Graph final {
   void InsertEdge(const EdgeAccessor &edge);
   bool ContainsVertex(const VertexAccessor &vertex);
   std::optional<VertexAccessor> RemoveVertex(const VertexAccessor &vertex);
+  std::optional<EdgeAccessor> RemoveEdge(const EdgeAccessor &edge);
 
   std::vector<EdgeAccessor> OutEdges(VertexAccessor vertex_accessor);