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package org.hl7.fhir.dstu3.terminologies;

import org.hl7.fhir.dstu3.model.Identifier;
import org.hl7.fhir.dstu3.model.Meta;
import org.hl7.fhir.dstu3.model.UriType;
import org.hl7.fhir.dstu3.model.ValueSet;

public class ValueSetUtilities {

  public static ValueSet makeShareable(ValueSet vs) {
    if (!vs.hasMeta())
      vs.setMeta(new Meta());
    for (UriType t : vs.getMeta().getProfile()) 
      if (t.getValue().equals("http://hl7.org/fhir/StructureDefinition/valueset-shareable-definition"))
        return vs;
    vs.getMeta().getProfile().add(new UriType("http://hl7.org/fhir/StructureDefinition/valueset-shareable-definition"));
    return vs;
  }

  public static void checkShareable(ValueSet vs) {
    if (!vs.hasMeta())
      throw new Error("ValueSet "+vs.getUrl()+" is not shareable");
    for (UriType t : vs.getMeta().getProfile()) {
      if (t.getValue().equals("http://hl7.org/fhir/StructureDefinition/valueset-shareable-definition"))
        return;
    }
    throw new Error("ValueSet "+vs.getUrl()+" is not shareable");    
  }

  public static boolean hasOID(ValueSet vs) {
    return getOID(vs) != null;
  }

  public static String getOID(ValueSet vs) {
    for (Identifier id : vs.getIdentifier()) {
      if ("urn:ietf:rfc:3986".equals(id.getSystem()) && id.hasValue() && id.getValue().startsWith("urn:oid:"))
        return id.getValue().substring(8);
    }
    return null;
  }

  public static void setOID(ValueSet vs, String oid) {
    if (!oid.startsWith("urn:oid:"))
      oid = "urn:oid:" + oid;
    for (Identifier id : vs.getIdentifier()) {
      if ("urn:ietf:rfc:3986".equals(id.getSystem()) && id.hasValue() && id.getValue().startsWith("urn:oid:")) {
        id.setValue(oid);
        return;
      }
    }
    vs.addIdentifier().setSystem("urn:ietf:rfc:3986").setValue(oid);
  }

}