Function convertSetClause

packages/graph/src/astToSteps.ts:527–556

* Convert a SET clause into a SetStep. * Supports three types of assignments: * 1. Individual property: n.prop = value * 2. Replace all properties: n = {props} * 3. Add/merge properties: n += {props}

(setClause: SetClause)

 * 3. Add/merge properties: n += {props}
 */
function convertSetClause(setClause: SetClause): SetStep {
  const assignments: StepSetOperation[] = setClause.assignments.map((assignment) => {
    // Check for SetAllProperties or SetAddProperties (map-based assignments)
    if ("type" in assignment) {
      if (assignment.type === "SetAllProperties") {
        const setAll = assignment as SetAllProperties;
        return {
          type: "setAllProperties" as const,
          variable: setAll.variable,
          properties: convertSetMapValue(setAll.properties),
        };
      } else if (assignment.type === "SetAddProperties") {
        const setAdd = assignment as SetAddProperties;
        return {
          type: "setAddProperties" as const,
          variable: setAdd.variable,
          properties: convertSetMapValue(setAdd.properties),
        };
      }
    }
    // Individual property assignment: n.prop = value
    return {
      variable: assignment.variable,
      property: assignment.property,
      value: convertSetValue(assignment.value),
    };
  });

  return new SetStep({ assignments });
}

/**
 * Convert a SET map value (property map or parameter reference).