Unify edges by adding only distinct edge ids to the graph

src/js/graph/graph.js

@@ -12,6 +12,7 @@ export class Graph {
 
     addEdge(newEdge){
         this.edges.push(newEdge);
+        this.edges = this.getUnique(this.edges, "id");
     }
 
     getUnique(arr, comp) {

src/js/graph/graphCreator.js

@@ -35,6 +35,7 @@ export class GraphCreator {
                     element.forEach(function (relation) {
                         if (relation instanceof neo4j.types.Relationship) {
                             var newEdge = {
+                                "id": relation.identity.toInt(),
                                 "source": relation.start.toInt(),
                                 "target": relation.end.toInt(),
                                 "type": relation.type