sparnatural/src/sparnatural/statehandling/actions/UpdateVarList.ts

Visual client-side SPARQL query builder and knowledge graph exploration tool

import GroupWrapper from "../../components/builder-section/groupwrapper/GroupWrapper";
import { DraggableComponent } from "../../components/variables-section/variableorder/DraggableComponent";
import ActionStore from "../ActionStore";

/*
    Traversing trough the building section and read out all the variables.
    Delete all variables (Draggables) in the variables-section which are not present
    Can be used when a GrpWrapper got deleted and the variable list needs to be updated
*/
export function updateVarList(actionStore: ActionStore) {
  // using a set so we don't have double values in it
  let varNames = new Set<string>();
  actionStore.sparnatural.BgWrapper.componentsList.rootGroupWrapper.traversePreOrder(
    (grpWrapper: GroupWrapper) => {
      let startGrp = grpWrapper.CriteriaGroup.StartClassGroup;
      let endGrp = grpWrapper.CriteriaGroup.EndClassGroup;
      if(startGrp.isVarSelected() && startGrp.getVarName()) varNames.add(startGrp.getVarName());
      if(endGrp.isVarSelected() && endGrp.getVarName()) varNames.add(endGrp.getVarName());      
    }
  );
  updateDraggables(actionStore, varNames);
}

function updateDraggables(actionStore: ActionStore, varNames: Set<string>) {
  let draggables =
    actionStore.sparnatural.variableSection.variableOrderMenu.draggables;
  
    // filter out the variables which don't exist anymore
  draggables = draggables.filter((d: DraggableComponent) => {
    if (varNames.has(d.state.selectedVariable.variable.replace("?",""))) {
      //keep draggable
      return d;
    } else {
      //delete it
      d.html.remove();
    }
  });
  actionStore.sparnatural.variableSection.variableOrderMenu.draggables = draggables;
}