SubProblem.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#include "SubProblem.h"
#include "Factory.h"
#include "MooseMesh.h"
#include "Conversion.h"
#include "Function.h"
#include "MooseApp.h"
#include "MooseVariableFE.h"
#include "MooseArray.h"
#include "Assembly.h"
#include "MooseObjectName.h"
#include "RelationshipManager.h"
#include "MooseUtils.h"
#include "DisplacedSystem.h"
#include "NonlinearSystemBase.h"
#include "LinearSystem.h"

#include "libmesh/equation_systems.h"
#include "libmesh/system.h"
#include "libmesh/dof_map.h"
#include "libmesh/string_to_enum.h"

#include <regex>

using namespace libMesh;

InputParameters
SubProblem::validParams()
{
  InputParameters params = Problem::validParams();

  params.addParam<bool>(
      "default_ghosting",
      false,
      "Whether or not to use libMesh's default amount of algebraic and geometric ghosting");

  params.addParamNamesToGroup("default_ghosting", "Advanced");

  return params;
}

const std::unordered_set<FEFamily> SubProblem::_default_families_without_p_refinement = {
    libMesh::LAGRANGE,
    libMesh::NEDELEC_ONE,
    libMesh::RAVIART_THOMAS,
    libMesh::LAGRANGE_VEC,
    libMesh::CLOUGH,
    libMesh::BERNSTEIN,
    libMesh::RATIONAL_BERNSTEIN};

// SubProblem /////
SubProblem::SubProblem(const InputParameters & parameters)
  : Problem(parameters),
    _factory(_app.getFactory()),
    _default_ghosting(getParam<bool>("default_ghosting")),
    _currently_computing_jacobian(false),
    _currently_computing_residual_and_jacobian(false),
    _computing_nonlinear_residual(false),
    _currently_computing_residual(false),
    _safe_access_tagged_matrices(false),
    _safe_access_tagged_vectors(false),
    _have_ad_objects(false),
    _show_functors(false),
    _show_chain_control_data(false),
    _typed_vector_tags(2),
    _have_p_refinement(false)
{
  unsigned int n_threads = libMesh::n_threads();
  _active_elemental_moose_variables.resize(n_threads);
  _has_active_elemental_moose_variables.resize(n_threads);

  _active_fe_var_coupleable_matrix_tags.resize(n_threads);
  _active_fe_var_coupleable_vector_tags.resize(n_threads);
  _active_sc_var_coupleable_matrix_tags.resize(n_threads);
  _active_sc_var_coupleable_vector_tags.resize(n_threads);

  _functors.resize(n_threads);
  _pbblf_functors.resize(n_threads);
  _functor_to_request_info.resize(n_threads);
}

SubProblem::~SubProblem() {}

TagID
SubProblem::addVectorTag(const TagName & tag_name,
                         const Moose::VectorTagType type /* = Moose::VECTOR_TAG_RESIDUAL */)
{
  if (type == Moose::VECTOR_TAG_ANY)
    mooseError("Vector tag type cannot be VECTOR_TAG_ANY");

  const auto tag_name_upper = MooseUtils::toUpper(tag_name);

  // First, see if the tag exists already
  for (const auto & vector_tag : _vector_tags)
  {
    mooseAssert(_vector_tags[vector_tag._id] == vector_tag, "Vector tags index mismatch");
    if (vector_tag._name == tag_name_upper)
    {
      if (vector_tag._type != type)
        mooseError("While attempting to add vector tag with name '",
                   tag_name_upper,
                   "' and type ",
                   type,
                   ",\na tag with the same name but type ",
                   vector_tag._type,
                   " was found.\n\nA tag can only exist with one type.");

      return vector_tag._id;
    }
  }

  // Doesn't exist - create it
  const TagID new_tag_id = _vector_tags.size();
  const TagTypeID new_tag_type_id = _typed_vector_tags[type].size();
  // Primary storage for all tags where the index in the vector == the tag ID
  _vector_tags.emplace_back(new_tag_id, new_tag_type_id, tag_name_upper, type);
  // Secondary storage for each type so that we can have quick access to all tags of a type
  _typed_vector_tags[type].emplace_back(new_tag_id, new_tag_type_id, tag_name_upper, type);
  // Name map storage for quick name access
  _vector_tags_name_map.emplace(tag_name_upper, new_tag_id);

  // Make sure that _vector_tags, _typed_vector_tags, and _vector_tags_name_map are sane
  verifyVectorTags();

  return new_tag_id;
}

bool
SubProblem::vectorTagExists(const TagName & tag_name) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  const auto tag_name_upper = MooseUtils::toUpper(tag_name);
  for (const auto & vector_tag : _vector_tags)
    if (vector_tag._name == tag_name_upper)
      return true;

  return false;
}

void
SubProblem::addNotZeroedVectorTag(const TagID tag)
{
  _not_zeroed_tagged_vectors.insert(tag);
}

bool
SubProblem::vectorTagNotZeroed(const TagID tag) const
{
  return _not_zeroed_tagged_vectors.count(tag);
}

const VectorTag &
SubProblem::getVectorTag(const TagID tag_id) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  if (!vectorTagExists(tag_id))
    mooseError("Vector tag with ID ", tag_id, " does not exist");

  return _vector_tags[tag_id];
}

std::vector<VectorTag>
SubProblem::getVectorTags(const std::set<TagID> & tag_ids) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  std::vector<VectorTag> tags;
  tags.reserve(tag_ids.size());
  for (const auto & tag_id : tag_ids)
    tags.push_back(getVectorTag(tag_id));
  return tags;
}

const std::vector<VectorTag> &
SubProblem::getVectorTags(const Moose::VectorTagType type /* = Moose::VECTOR_TAG_ANY */) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  if (type == Moose::VECTOR_TAG_ANY)
    return _vector_tags;
  else
    return _typed_vector_tags[type];
}

unsigned int
SubProblem::numVectorTags(const Moose::VectorTagType type /* = Moose::VECTOR_TAG_ANY */) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  return getVectorTags(type).size();
}

TagID
SubProblem::getVectorTagID(const TagName & tag_name) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");

  const auto tag_name_upper = MooseUtils::toUpper(tag_name);
  const auto search = _vector_tags_name_map.find(tag_name_upper);
  if (search != _vector_tags_name_map.end())
    return search->second;

  std::string message =
      tag_name_upper == "TIME"
          ? ".\n\nThis may occur if "
            "you have a TimeKernel in your problem but did not specify a transient executioner."
          : "";
  mooseError("Vector tag '", tag_name_upper, "' does not exist", message);
}

TagName
SubProblem::vectorTagName(const TagID tag_id) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");
  if (!vectorTagExists(tag_id))
    mooseError("Vector tag with ID ", tag_id, " does not exist");

  return _vector_tags[tag_id]._name;
}

Moose::VectorTagType
SubProblem::vectorTagType(const TagID tag_id) const
{
  mooseAssert(verifyVectorTags(), "Vector tag storage invalid");
  if (!vectorTagExists(tag_id))
    mooseError("Vector tag with ID ", tag_id, " does not exist");

  return _vector_tags[tag_id]._type;
}

bool
SubProblem::verifyVectorTags() const
{
  for (TagID tag_id = 0; tag_id < _vector_tags.size(); ++tag_id)
  {
    const auto & vector_tag = _vector_tags[tag_id];

    if (vector_tag._id != tag_id)
      mooseError("Vector tag ", vector_tag._id, " id mismatch in _vector_tags");
    if (vector_tag._type == Moose::VECTOR_TAG_ANY)
      mooseError("Vector tag '", vector_tag._name, "' has type VECTOR_TAG_ANY");

    const auto search = _vector_tags_name_map.find(vector_tag._name);
    if (search == _vector_tags_name_map.end())
      mooseError("Vector tag ", vector_tag._id, " is not in _vector_tags_name_map");
    else if (search->second != tag_id)
      mooseError("Vector tag ", vector_tag._id, " has incorrect id in _vector_tags_name_map");

    unsigned int found_in_type = 0;
    for (TagTypeID tag_type_id = 0; tag_type_id < _typed_vector_tags[vector_tag._type].size();
         ++tag_type_id)
    {
      const auto & vector_tag_type = _typed_vector_tags[vector_tag._type][tag_type_id];
      if (vector_tag_type == vector_tag)
      {
        ++found_in_type;
        if (vector_tag_type._type_id != tag_type_id)
          mooseError("Type ID for Vector tag ", tag_id, " is incorrect");
      }
    }

    if (found_in_type == 0)
      mooseError("Vector tag ", tag_id, " not found in _typed_vector_tags");
    if (found_in_type > 1)
      mooseError("Vector tag ", tag_id, " found multiple times in _typed_vector_tags");
  }

  unsigned int num_typed_vector_tags = 0;
  for (const auto & typed_vector_tags : _typed_vector_tags)
    num_typed_vector_tags += typed_vector_tags.size();
  if (num_typed_vector_tags != _vector_tags.size())
    mooseError("Size mismatch between _vector_tags and _typed_vector_tags");
  if (_vector_tags_name_map.size() != _vector_tags.size())
    mooseError("Size mismatch between _vector_tags and _vector_tags_name_map");

  return true;
}

void
SubProblem::selectVectorTagsFromSystem(const SystemBase & system,
                                       const std::vector<VectorTag> & input_vector_tags,
                                       std::set<TagID> & selected_tags)
{
  selected_tags.clear();
  for (const auto & vector_tag : input_vector_tags)
    if (system.hasVector(vector_tag._id))
      selected_tags.insert(vector_tag._id);
}

void
SubProblem::selectMatrixTagsFromSystem(const SystemBase & system,
                                       const std::map<TagName, TagID> & input_matrix_tags,
                                       std::set<TagID> & selected_tags)
{
  selected_tags.clear();
  for (const auto & matrix_tag_pair : input_matrix_tags)
    if (system.hasMatrix(matrix_tag_pair.second))
      selected_tags.insert(matrix_tag_pair.second);
}

TagID
SubProblem::addMatrixTag(TagName tag_name)
{
  auto tag_name_upper = MooseUtils::toUpper(tag_name);
  auto existing_tag = _matrix_tag_name_to_tag_id.find(tag_name_upper);
  if (existing_tag == _matrix_tag_name_to_tag_id.end())
  {
    auto tag_id = _matrix_tag_name_to_tag_id.size();

    _matrix_tag_name_to_tag_id[tag_name_upper] = tag_id;

    _matrix_tag_id_to_tag_name[tag_id] = tag_name_upper;
  }

  return _matrix_tag_name_to_tag_id.at(tag_name_upper);
}

bool
SubProblem::matrixTagExists(const TagName & tag_name) const
{
  auto tag_name_upper = MooseUtils::toUpper(tag_name);

  return _matrix_tag_name_to_tag_id.find(tag_name_upper) != _matrix_tag_name_to_tag_id.end();
}

bool
SubProblem::matrixTagExists(TagID tag_id) const
{
  return _matrix_tag_id_to_tag_name.find(tag_id) != _matrix_tag_id_to_tag_name.end();
}

TagID
SubProblem::getMatrixTagID(const TagName & tag_name) const
{
  auto tag_name_upper = MooseUtils::toUpper(tag_name);

  if (!matrixTagExists(tag_name))
    mooseError("Matrix tag: ",
               tag_name,
               " does not exist. ",
               "If this is a TimeKernel then this may have happened because you didn't "
               "specify a Transient Executioner.");

  return _matrix_tag_name_to_tag_id.at(tag_name_upper);
}

TagName
SubProblem::matrixTagName(TagID tag)
{
  return _matrix_tag_id_to_tag_name[tag];
}

void
SubProblem::setActiveFEVariableCoupleableMatrixTags(std::set<TagID> & mtags, const THREAD_ID tid)
{
  _active_fe_var_coupleable_matrix_tags[tid] = mtags;
}

void
SubProblem::setActiveFEVariableCoupleableVectorTags(std::set<TagID> & vtags, const THREAD_ID tid)
{
  _active_fe_var_coupleable_vector_tags[tid] = vtags;
  for (const auto sys_num : make_range(numSolverSystems()))
    systemBaseSolver(sys_num).setActiveVariableCoupleableVectorTags(vtags, tid);
  systemBaseAuxiliary().setActiveVariableCoupleableVectorTags(vtags, tid);
}

void
SubProblem::clearActiveFEVariableCoupleableVectorTags(const THREAD_ID tid)
{
  _active_fe_var_coupleable_vector_tags[tid].clear();
}

void
SubProblem::clearActiveFEVariableCoupleableMatrixTags(const THREAD_ID tid)
{
  _active_fe_var_coupleable_matrix_tags[tid].clear();
}

const std::set<TagID> &
SubProblem::getActiveFEVariableCoupleableMatrixTags(const THREAD_ID tid) const
{
  return _active_fe_var_coupleable_matrix_tags[tid];
}

const std::set<TagID> &
SubProblem::getActiveFEVariableCoupleableVectorTags(const THREAD_ID tid) const
{
  return _active_fe_var_coupleable_vector_tags[tid];
}

void
SubProblem::setActiveScalarVariableCoupleableMatrixTags(std::set<TagID> & mtags,
                                                        const THREAD_ID tid)
{
  _active_sc_var_coupleable_matrix_tags[tid] = mtags;
}

void
SubProblem::setActiveScalarVariableCoupleableVectorTags(std::set<TagID> & vtags,
                                                        const THREAD_ID tid)
{
  _active_sc_var_coupleable_vector_tags[tid] = vtags;
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    systemBaseNonlinear(nl_sys_num).setActiveScalarVariableCoupleableVectorTags(vtags, tid);
  systemBaseAuxiliary().setActiveScalarVariableCoupleableVectorTags(vtags, tid);
}

void
SubProblem::clearActiveScalarVariableCoupleableVectorTags(const THREAD_ID tid)
{
  _active_sc_var_coupleable_vector_tags[tid].clear();
}

void
SubProblem::clearActiveScalarVariableCoupleableMatrixTags(const THREAD_ID tid)
{
  _active_sc_var_coupleable_matrix_tags[tid].clear();
}

const std::set<TagID> &
SubProblem::getActiveScalarVariableCoupleableMatrixTags(const THREAD_ID tid) const
{
  return _active_sc_var_coupleable_matrix_tags[tid];
}

const std::set<TagID> &
SubProblem::getActiveScalarVariableCoupleableVectorTags(const THREAD_ID tid) const
{
  return _active_sc_var_coupleable_vector_tags[tid];
}

void
SubProblem::setActiveElementalMooseVariables(const std::set<MooseVariableFEBase *> & moose_vars,
                                             const THREAD_ID tid)
{
  if (!moose_vars.empty())
  {
    _has_active_elemental_moose_variables[tid] = 1;
    _active_elemental_moose_variables[tid] = moose_vars;
  }
}

const std::set<MooseVariableFEBase *> &
SubProblem::getActiveElementalMooseVariables(const THREAD_ID tid) const
{
  return _active_elemental_moose_variables[tid];
}

bool
SubProblem::hasActiveElementalMooseVariables(const THREAD_ID tid) const
{
  return _has_active_elemental_moose_variables[tid];
}

void
SubProblem::clearActiveElementalMooseVariables(const THREAD_ID tid)
{
  _has_active_elemental_moose_variables[tid] = 0;
  _active_elemental_moose_variables[tid].clear();
}

std::set<SubdomainID>
SubProblem::getMaterialPropertyBlocks(const std::string & prop_name)
{
  std::set<SubdomainID> blocks;

  for (const auto & it : _map_block_material_props)
  {
    const std::set<std::string> & prop_names = it.second;
    std::set<std::string>::iterator name_it = prop_names.find(prop_name);
    if (name_it != prop_names.end())
      blocks.insert(it.first);
  }

  return blocks;
}

std::vector<SubdomainName>
SubProblem::getMaterialPropertyBlockNames(const std::string & prop_name)
{
  std::set<SubdomainID> blocks = getMaterialPropertyBlocks(prop_name);
  std::vector<SubdomainName> block_names;
  block_names.reserve(blocks.size());
  for (const auto & block_id : blocks)
  {
    SubdomainName name;
    name = mesh().getMesh().subdomain_name(block_id);
    if (name.empty())
    {
      std::ostringstream oss;
      oss << block_id;
      name = oss.str();
    }
    block_names.push_back(name);
  }

  return block_names;
}

bool
SubProblem::hasBlockMaterialProperty(SubdomainID bid, const std::string & prop_name)
{
  auto it = _map_block_material_props.find(bid);
  if (it == _map_block_material_props.end())
    return false;

  if (it->second.count(prop_name) > 0)
    return true;
  else
    return false;
}

// TODO: remove code duplication by templating
std::set<BoundaryID>
SubProblem::getMaterialPropertyBoundaryIDs(const std::string & prop_name)
{
  std::set<BoundaryID> boundaries;

  for (const auto & it : _map_boundary_material_props)
  {
    const std::set<std::string> & prop_names = it.second;
    std::set<std::string>::iterator name_it = prop_names.find(prop_name);
    if (name_it != prop_names.end())
      boundaries.insert(it.first);
  }

  return boundaries;
}

std::vector<BoundaryName>
SubProblem::getMaterialPropertyBoundaryNames(const std::string & prop_name)
{
  std::set<BoundaryID> boundaries = getMaterialPropertyBoundaryIDs(prop_name);
  std::vector<BoundaryName> boundary_names;
  boundary_names.reserve(boundaries.size());
  const BoundaryInfo & boundary_info = mesh().getMesh().get_boundary_info();

  for (const auto & bnd_id : boundaries)
  {
    BoundaryName name;
    if (bnd_id == Moose::ANY_BOUNDARY_ID)
      name = "ANY_BOUNDARY_ID";
    else
    {
      name = boundary_info.get_sideset_name(bnd_id);
      if (name.empty())
      {
        std::ostringstream oss;
        oss << bnd_id;
        name = oss.str();
      }
    }
    boundary_names.push_back(name);
  }

  return boundary_names;
}

bool
SubProblem::hasBoundaryMaterialProperty(BoundaryID bid, const std::string & prop_name)
{
  auto it = _map_boundary_material_props.find(bid);
  if (it == _map_boundary_material_props.end())
    return false;

  if (it->second.count(prop_name) > 0)
    return true;
  else
    return false;
}

void
SubProblem::storeSubdomainMatPropName(SubdomainID block_id, const std::string & name)
{
  _map_block_material_props[block_id].insert(name);
}

void
SubProblem::storeBoundaryMatPropName(BoundaryID boundary_id, const std::string & name)
{
  _map_boundary_material_props[boundary_id].insert(name);
}

void
SubProblem::storeSubdomainZeroMatProp(SubdomainID block_id, const MaterialPropertyName & name)
{
  _zero_block_material_props[block_id].insert(name);
}

void
SubProblem::storeBoundaryZeroMatProp(BoundaryID boundary_id, const MaterialPropertyName & name)
{
  _zero_boundary_material_props[boundary_id].insert(name);
}

void
SubProblem::storeSubdomainDelayedCheckMatProp(const std::string & requestor,
                                              SubdomainID block_id,
                                              const std::string & name)
{
  _map_block_material_props_check[block_id].insert(std::make_pair(requestor, name));
}

void
SubProblem::storeBoundaryDelayedCheckMatProp(const std::string & requestor,
                                             BoundaryID boundary_id,
                                             const std::string & name)
{
  _map_boundary_material_props_check[boundary_id].insert(std::make_pair(requestor, name));
}

void
SubProblem::checkBlockMatProps()
{
  // Variable for storing all available blocks/boundaries from the mesh
  std::set<SubdomainID> all_ids(mesh().meshSubdomains());

  std::stringstream errors;

  // Loop through the properties to check
  for (const auto & check_it : _map_block_material_props_check)
  {
    // The current id for the property being checked (BoundaryID || BlockID)
    SubdomainID check_id = check_it.first;

    std::set<SubdomainID> check_ids = {check_id};

    // Loop through all the block/boundary ids
    for (const auto & id : check_ids)
    {
      // Loop through all the stored properties
      for (const auto & prop_it : check_it.second)
      {
        // Produce an error if the material property is not defined on the current block/boundary
        // and any block/boundary
        // and not is not a zero material property.
        if (_map_block_material_props[id].count(prop_it.second) == 0 &&
            _zero_block_material_props[id].count(prop_it.second) == 0)
        {
          std::string check_name = restrictionSubdomainCheckName(id);
          if (check_name.empty())
            check_name = std::to_string(id);
          errors << "Material property '" << prop_it.second << "', requested by '" << prop_it.first
                 << "' is not defined on block " << check_name << "\n";
        }
      }
    }
  }

  if (!errors.str().empty())
    mooseError(errors.str());
}

void
SubProblem::checkBoundaryMatProps()
{
  // Variable for storing the value for ANY_BOUNDARY_ID
  BoundaryID any_id = Moose::ANY_BOUNDARY_ID;

  // Variable for storing all available blocks/boundaries from the mesh
  std::set<BoundaryID> all_ids(mesh().getBoundaryIDs());

  std::stringstream errors;

  // Loop through the properties to check
  for (const auto & check_it : _map_boundary_material_props_check)
  {
    // The current id for the property being checked (BoundaryID || BlockID)
    BoundaryID check_id = check_it.first;

    // In the case when the material being checked has an ID is set to ANY, then loop through all
    // the possible ids and verify that the material property is defined.
    std::set<BoundaryID> check_ids{check_id};
    if (check_id == any_id)
      check_ids = all_ids;

    // Loop through all the block/boundary ids
    for (const auto & id : check_ids)
    {
      // Loop through all the stored properties
      for (const auto & prop_it : check_it.second)
      {
        // Produce an error if the material property is not defined on the current block/boundary
        // and any block/boundary
        // and not is not a zero material property.
        if (_map_boundary_material_props[id].count(prop_it.second) == 0 &&
            _map_boundary_material_props[any_id].count(prop_it.second) == 0 &&
            _zero_boundary_material_props[id].count(prop_it.second) == 0 &&
            _zero_boundary_material_props[any_id].count(prop_it.second) == 0)
        {
          std::string check_name = restrictionBoundaryCheckName(id);
          if (check_name.empty())
            check_name = std::to_string(id);
          errors << "Material property '" << prop_it.second << "', requested by '" << prop_it.first
                 << "' is not defined on boundary " << check_name << "\n";
        }
      }
    }
  }

  if (!errors.str().empty())
    mooseError(errors.str());
}

bool
SubProblem::nlConverged(const unsigned int nl_sys_num)
{
  mooseAssert(nl_sys_num < numNonlinearSystems(),
              "The nonlinear system number is higher than the number of systems we have!");
  return solverSystemConverged(nl_sys_num);
}

void
SubProblem::markMatPropRequested(const std::string & prop_name)
{
  _material_property_requested.insert(prop_name);
}

bool
SubProblem::isMatPropRequested(const std::string & prop_name) const
{
  return _material_property_requested.find(prop_name) != _material_property_requested.end();
}

void
SubProblem::addConsumedPropertyName(const MooseObjectName & obj_name, const std::string & prop_name)
{
  _consumed_material_properties[obj_name].insert(prop_name);
}

const std::map<MooseObjectName, std::set<std::string>> &
SubProblem::getConsumedPropertyMap() const
{
  return _consumed_material_properties;
}

DiracKernelInfo &
SubProblem::diracKernelInfo()
{
  return _dirac_kernel_info;
}

Real
SubProblem::finalNonlinearResidual(unsigned int) const
{
  return 0;
}

unsigned int
SubProblem::nNonlinearIterations(unsigned int) const
{
  return 0;
}

unsigned int
SubProblem::nLinearIterations(unsigned int) const
{
  return 0;
}

std::string
SubProblem::restrictionSubdomainCheckName(SubdomainID check_id)
{
  // TODO: Put a better a interface in MOOSE
  std::map<subdomain_id_type, std::string> & name_map = mesh().getMesh().set_subdomain_name_map();
  std::map<subdomain_id_type, std::string>::const_iterator pos = name_map.find(check_id);
  if (pos != name_map.end())
    return pos->second;
  return "";
}

std::string
SubProblem::restrictionBoundaryCheckName(BoundaryID check_id)
{
  return mesh().getMesh().get_boundary_info().sideset_name(check_id);
}

void
SubProblem::setCurrentBoundaryID(BoundaryID bid, const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    assembly(tid, nl_sys_num).setCurrentBoundaryID(bid);
}

unsigned int
SubProblem::getAxisymmetricRadialCoord() const
{
  return mesh().getAxisymmetricRadialCoord();
}

bool
SubProblem::hasLinearVariable(const std::string & var_name) const
{
  for (const auto i : make_range(numLinearSystems()))
    if (systemBaseLinear(i).hasVariable(var_name))
      return true;
  return false;
}

bool
SubProblem::hasAuxiliaryVariable(const std::string & var_name) const
{
  return systemBaseAuxiliary().hasVariable(var_name);
}

template <typename T>
MooseVariableFEBase &
SubProblem::getVariableHelper(const THREAD_ID tid,
                              const std::string & var_name,
                              Moose::VarKindType expected_var_type,
                              Moose::VarFieldType expected_var_field_type,
                              const std::vector<T> & systems,
                              const SystemBase & aux) const
{
  // Eventual return value
  MooseVariableFEBase * var = nullptr;

  const auto [var_in_sys, sys_num] = determineSolverSystem(var_name);

  // First check that the variable is found on the expected system.
  if (expected_var_type == Moose::VarKindType::VAR_ANY)
  {
    if (var_in_sys)
      var = &(systems[sys_num]->getVariable(tid, var_name));
    else if (aux.hasVariable(var_name))
      var = &(aux.getVariable(tid, var_name));
    else
      mooseError("Unknown variable " + var_name);
  }
  else if (expected_var_type == Moose::VarKindType::VAR_SOLVER && var_in_sys &&
           systems[sys_num]->hasVariable(var_name))
    var = &(systems[sys_num]->getVariable(tid, var_name));
  else if (expected_var_type == Moose::VarKindType::VAR_AUXILIARY && aux.hasVariable(var_name))
    var = &(aux.getVariable(tid, var_name));
  else
  {
    std::string expected_var_type_string =
        (expected_var_type == Moose::VarKindType::VAR_SOLVER ? "nonlinear" : "auxiliary");
    mooseError("No ",
               expected_var_type_string,
               " variable named ",
               var_name,
               " found. "
               "Did you specify an auxiliary variable when you meant to specify a nonlinear "
               "variable (or vice-versa)?");
  }

  // Now make sure the var found has the expected field type.
  if ((expected_var_field_type == Moose::VarFieldType::VAR_FIELD_ANY) ||
      (expected_var_field_type == var->fieldType()))
    return *var;
  else
  {
    std::string expected_var_field_type_string =
        MooseUtils::toLower(Moose::stringify(expected_var_field_type));
    std::string var_field_type_string = MooseUtils::toLower(Moose::stringify(var->fieldType()));

    mooseError("No ",
               expected_var_field_type_string,
               " variable named ",
               var_name,
               " found. "
               "Did you specify a ",
               var_field_type_string,
               " variable when you meant to specify a ",
               expected_var_field_type_string,
               " variable?");
  }
}

void
SubProblem::reinitElemFaceRef(const Elem * elem,
                              unsigned int side,
                              Real tolerance,
                              const std::vector<Point> * const pts,
                              const std::vector<Real> * const weights,
                              const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
  {
    // - Set our _current_elem for proper dof index getting in the moose variables
    // - Reinitialize all of our FE objects so we have current phi, dphi, etc. data
    // Note that our number of shape functions will reflect the number of shapes associated with the
    // interior element while the number of quadrature points will be determined by the passed pts
    // parameter (which presumably will have a number of pts reflective of a facial quadrature rule)
    assembly(tid, nl_sys_num).reinitElemFaceRef(elem, side, tolerance, pts, weights);

    auto & nl = systemBaseNonlinear(nl_sys_num);

    // Actually get the dof indices in the moose variables
    nl.prepare(tid);

    // Let's finally compute our variable values!
    nl.reinitElemFace(elem, side, tid);
  }

  // do same for aux as for nl
  systemBaseAuxiliary().prepare(tid);
  systemBaseAuxiliary().reinitElemFace(elem, side, tid);

  // With the dof indices set in the moose variables, now let's properly size
  // our local residuals/Jacobians
  auto & current_assembly = assembly(tid, currentNlSysNum());
  if (currentlyComputingJacobian() || currentlyComputingResidualAndJacobian())
    current_assembly.prepareJacobianBlock();
  if (!currentlyComputingJacobian())
    current_assembly.prepareResidual();
}

void
SubProblem::reinitNeighborFaceRef(const Elem * neighbor_elem,
                                  unsigned int neighbor_side,
                                  Real tolerance,
                                  const std::vector<Point> * const pts,
                                  const std::vector<Real> * const weights,
                                  const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
  {
    // - Set our _current_neighbor_elem for proper dof index getting in the moose variables
    // - Reinitialize all of our FE objects so we have current phi, dphi, etc. data
    // Note that our number of shape functions will reflect the number of shapes associated with the
    // interior element while the number of quadrature points will be determined by the passed pts
    // parameter (which presumably will have a number of pts reflective of a facial quadrature rule)
    assembly(tid, nl_sys_num)
        .reinitNeighborFaceRef(neighbor_elem, neighbor_side, tolerance, pts, weights);

    auto & nl = systemBaseNonlinear(nl_sys_num);

    // Actually get the dof indices in the moose variables
    nl.prepareNeighbor(tid);

    // Let's finally compute our variable values!
    nl.reinitNeighborFace(neighbor_elem, neighbor_side, tid);
  }

  // do same for aux as for nl
  systemBaseAuxiliary().prepareNeighbor(tid);
  systemBaseAuxiliary().reinitNeighborFace(neighbor_elem, neighbor_side, tid);

  // With the dof indices set in the moose variables, now let's properly size
  // our local residuals/Jacobians
  assembly(tid, currentNlSysNum()).prepareNeighbor();
}

void
SubProblem::reinitLowerDElem(const Elem * elem,
                             const THREAD_ID tid,
                             const std::vector<Point> * const pts,
                             const std::vector<Real> * const weights)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
  {
    // - Set our _current_lower_d_elem for proper dof index getting in the moose variables
    // - Reinitialize all of our lower-d FE objects so we have current phi, dphi, etc. data
    assembly(tid, nl_sys_num).reinitLowerDElem(elem, pts, weights);

    auto & nl = systemBaseNonlinear(nl_sys_num);

    // Actually get the dof indices in the moose variables
    nl.prepareLowerD(tid);

    // With the dof indices set in the moose variables, now let's properly size
    // our local residuals/Jacobians
    assembly(tid, nl_sys_num).prepareLowerD();

    // Let's finally compute our variable values!
    nl.reinitLowerD(tid);
  }

  // do same for aux as for nl
  systemBaseAuxiliary().prepareLowerD(tid);
  systemBaseAuxiliary().reinitLowerD(tid);
}

void
SubProblem::reinitNeighborLowerDElem(const Elem * elem, const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    assembly(tid, nl_sys_num).reinitNeighborLowerDElem(elem);
}

void
SubProblem::reinitMortarElem(const Elem * elem, const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    assembly(tid, nl_sys_num).reinitMortarElem(elem);
}

void
SubProblem::cloneAlgebraicGhostingFunctor(GhostingFunctor & algebraic_gf, bool to_mesh)
{
  EquationSystems & eq = es();
  const auto n_sys = eq.n_systems();

  auto pr = _root_alg_gf_to_sys_clones.emplace(
      &algebraic_gf, std::vector<std::shared_ptr<GhostingFunctor>>(n_sys - 1));
  mooseAssert(pr.second, "We are adding a duplicate algebraic ghosting functor");
  auto & clones_vec = pr.first->second;

  for (MooseIndex(n_sys) i = 1; i < n_sys; ++i)
  {
    DofMap & dof_map = eq.get_system(i).get_dof_map();
    std::shared_ptr<GhostingFunctor> clone_alg_gf = algebraic_gf.clone();
    std::dynamic_pointer_cast<RelationshipManager>(clone_alg_gf)
        ->init(mesh(), *algebraic_gf.get_mesh(), &dof_map);
    dof_map.add_algebraic_ghosting_functor(clone_alg_gf, to_mesh);
    clones_vec[i - 1] = clone_alg_gf;
  }
}

void
SubProblem::addAlgebraicGhostingFunctor(GhostingFunctor & algebraic_gf, bool to_mesh)
{
  EquationSystems & eq = es();
  const auto n_sys = eq.n_systems();
  if (!n_sys)
    return;

  eq.get_system(0).get_dof_map().add_algebraic_ghosting_functor(algebraic_gf, to_mesh);
  cloneAlgebraicGhostingFunctor(algebraic_gf, to_mesh);
}

void
SubProblem::cloneCouplingGhostingFunctor(GhostingFunctor & coupling_gf, bool to_mesh)
{
  const std::size_t num_nl_sys = numNonlinearSystems();

  auto pr = _root_coupling_gf_to_sys_clones.emplace(
      &coupling_gf, std::vector<std::shared_ptr<GhostingFunctor>>(num_nl_sys - 1));
  mooseAssert(pr.second, "We are adding a duplicate coupling functor");
  auto & clones_vec = pr.first->second;

  for (const auto i : make_range(std::size_t(1), num_nl_sys))
  {
    DofMap & dof_map = systemBaseNonlinear(i).system().get_dof_map();
    std::shared_ptr<GhostingFunctor> clone_coupling_gf = coupling_gf.clone();
    std::dynamic_pointer_cast<RelationshipManager>(clone_coupling_gf)
        ->init(mesh(), *coupling_gf.get_mesh(), &dof_map);
    dof_map.add_coupling_functor(clone_coupling_gf, to_mesh);
    clones_vec[i - 1] = clone_coupling_gf;
  }
}

void
SubProblem::addCouplingGhostingFunctor(GhostingFunctor & coupling_gf, bool to_mesh)
{
  const auto num_nl_sys = numNonlinearSystems();
  if (!num_nl_sys)
    return;

  systemBaseNonlinear(0).system().get_dof_map().add_coupling_functor(coupling_gf, to_mesh);
  cloneCouplingGhostingFunctor(coupling_gf, to_mesh);
}

void
SubProblem::removeAlgebraicGhostingFunctor(GhostingFunctor & algebraic_gf)
{
  EquationSystems & eq = es();
  const auto n_sys = eq.n_systems();
  DofMap & nl_dof_map = eq.get_system(0).get_dof_map();

  const bool found_in_root_sys =
      std::find(nl_dof_map.algebraic_ghosting_functors_begin(),
                nl_dof_map.algebraic_ghosting_functors_end(),
                &algebraic_gf) != nl_dof_map.algebraic_ghosting_functors_end();

#ifndef NDEBUG
  const bool found_in_our_map =
      _root_alg_gf_to_sys_clones.find(&algebraic_gf) != _root_alg_gf_to_sys_clones.end();
  mooseAssert(found_in_root_sys == found_in_our_map,
              "If the ghosting functor exists in the root DofMap, then we need to have a key for "
              "it in our gf to clones map");
#endif

  if (found_in_root_sys) // libMesh yells if we try to remove
                         // something that's not there
    nl_dof_map.remove_algebraic_ghosting_functor(algebraic_gf);

  auto it = _root_alg_gf_to_sys_clones.find(&algebraic_gf);
  if (it == _root_alg_gf_to_sys_clones.end())
    return;

  auto & clones_vec = it->second;
  mooseAssert((n_sys - 1) == clones_vec.size(),
              "The size of the gf clones vector doesn't match the number of systems minus one");
  if (clones_vec.empty())
  {
    mooseAssert(n_sys == 1, "The clones vector should only be empty if there is only one system");
    return;
  }

  for (const auto i : make_range(n_sys))
    eq.get_system(i + 1).get_dof_map().remove_algebraic_ghosting_functor(*clones_vec[i]);

  _root_alg_gf_to_sys_clones.erase(it->first);
}

void
SubProblem::removeCouplingGhostingFunctor(GhostingFunctor & coupling_gf)
{
  EquationSystems & eq = es();
  const auto num_nl_sys = numNonlinearSystems();
  if (!num_nl_sys)
    return;

  DofMap & nl_dof_map = eq.get_system(0).get_dof_map();
  const bool found_in_root_sys = std::find(nl_dof_map.coupling_functors_begin(),
                                           nl_dof_map.coupling_functors_end(),
                                           &coupling_gf) != nl_dof_map.coupling_functors_end();

#ifndef NDEBUG
  const bool found_in_our_map =
      _root_coupling_gf_to_sys_clones.find(&coupling_gf) != _root_coupling_gf_to_sys_clones.end();
  mooseAssert(found_in_root_sys == found_in_our_map,
              "If the ghosting functor exists in the root DofMap, then we need to have a key for "
              "it in our gf to clones map");
#endif

  if (found_in_root_sys) // libMesh yells if we try to remove
                         // something that's not there
    nl_dof_map.remove_coupling_functor(coupling_gf);

  auto it = _root_coupling_gf_to_sys_clones.find(&coupling_gf);
  if (it == _root_coupling_gf_to_sys_clones.end())
    return;

  auto & clones_vec = it->second;
  mooseAssert((num_nl_sys - 1) == clones_vec.size(),
              "The size of the gf clones vector doesn't match the number of systems minus one");
  if (clones_vec.empty())
  {
    mooseAssert(num_nl_sys == 1,
                "The clones vector should only be empty if there is only one nonlinear system");
    return;
  }

  for (const auto i : make_range(num_nl_sys))
    eq.get_system(i + 1).get_dof_map().remove_coupling_functor(*clones_vec[i]);

  _root_coupling_gf_to_sys_clones.erase(it->first);
}

void
SubProblem::automaticScaling(bool automatic_scaling)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    systemBaseNonlinear(nl_sys_num).automaticScaling(automatic_scaling);
}

bool
SubProblem::automaticScaling() const
{
  // Currently going to assume that we are applying or not applying automatic scaling consistently
  // across nonlinear systems
  return systemBaseNonlinear(0).automaticScaling();
}

void
SubProblem::hasScalingVector(const unsigned int nl_sys_num)
{
  for (const THREAD_ID tid : make_range(libMesh::n_threads()))
    assembly(tid, nl_sys_num).hasScalingVector();
}

void
SubProblem::clearAllDofIndices()
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    systemBaseNonlinear(nl_sys_num).clearAllDofIndices();
  systemBaseAuxiliary().clearAllDofIndices();
}

void
SubProblem::timestepSetup()
{
  for (auto & map : _pbblf_functors)
    for (auto & pr : map)
      pr.second->timestepSetup();
  if (_show_chain_control_data)
    _console << _app.getChainControlDataSystem().outputChainControlMap() << std::flush;
}

void
SubProblem::customSetup(const ExecFlagType & exec_type)
{
  for (auto & map : _pbblf_functors)
    for (auto & pr : map)
      pr.second->customSetup(exec_type);
}

void
SubProblem::residualSetup()
{
  for (auto & map : _pbblf_functors)
    for (auto & pr : map)
      pr.second->residualSetup();
}

void
SubProblem::jacobianSetup()
{
  for (auto & map : _pbblf_functors)
    for (auto & pr : map)
      pr.second->jacobianSetup();
}

void
SubProblem::initialSetup()
{
  if (_show_functors)
  {
    showFunctors();
    showFunctorRequestors();
  }
  if (_show_chain_control_data)
    _console << _app.getChainControlDataSystem().outputChainControlMap() << std::flush;

  for (const auto & functors : _functors)
    for (const auto & [functor_wrapper_name, functor_wrapper] : functors)
    {
      const auto & [true_functor_type, non_ad_functor, ad_functor] = functor_wrapper;
      mooseAssert(non_ad_functor->wrapsNull() == ad_functor->wrapsNull(), "These must agree");
      const auto functor_name = removeSubstring(functor_wrapper_name, "wraps_");
      if (non_ad_functor->wrapsNull())
        mooseError(
            "No functor ever provided with name '",
            functor_name,
            "', which was requested by '",
            MooseUtils::join(libmesh_map_find(_functor_to_requestors, functor_wrapper_name), ","),
            "'.");
      if (true_functor_type == TrueFunctorIs::NONAD ? non_ad_functor->ownsWrappedFunctor()
                                                    : ad_functor->ownsWrappedFunctor())
        mooseError("Functor envelopes should not own the functors they wrap, but '",
                   functor_name,
                   "' is owned by the wrapper. Please open a MOOSE issue for help resolving this.");
    }
}

void
SubProblem::showFunctors() const
{
  _console << "[DBG] Wrapped functors found in Subproblem" << std::endl;
  std::string functor_names = "[DBG] ";
  for (const auto & functor_pair : _functors[0])
    functor_names += std::regex_replace(functor_pair.first, std::regex("wraps_"), "") + " ";
  if (functor_names.size())
    functor_names.pop_back();
  _console << functor_names << std::endl;
}

void
SubProblem::showFunctorRequestors() const
{
  for (const auto & [functor, requestors] : _functor_to_requestors)
  {
    _console << "[DBG] Requestors for wrapped functor "
             << std::regex_replace(functor, std::regex("wraps_"), "") << std::endl;
    _console << "[DBG] " << MooseUtils::join(requestors, " ") << std::endl;
  }
}

bool
SubProblem::hasFunctor(const std::string & name, const THREAD_ID tid) const
{
  mooseAssert(tid < _functors.size(), "Too large a thread ID");
  auto & functors = _functors[tid];
  return (functors.find("wraps_" + name) != functors.end());
}

Moose::CoordinateSystemType
SubProblem::getCoordSystem(SubdomainID sid) const
{
  return mesh().getCoordSystem(sid);
}

void
SubProblem::reinitFVFace(const THREAD_ID tid, const FaceInfo & fi)
{
  for (const auto nl : make_range(numNonlinearSystems()))
    assembly(tid, nl).reinitFVFace(fi);
}

void
SubProblem::cacheResidual(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum())
      .cacheResidual(Assembly::GlobalDataKey{}, currentResidualVectorTags());
}

void
SubProblem::cacheResidualNeighbor(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum())
      .cacheResidualNeighbor(Assembly::GlobalDataKey{}, currentResidualVectorTags());
}

void
SubProblem::addCachedResidual(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum())
      .addCachedResiduals(Assembly::GlobalDataKey{}, currentResidualVectorTags());
}

void
SubProblem::cacheJacobian(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum()).cacheJacobian(Assembly::GlobalDataKey{});
  if (hasNonlocalCoupling())
    assembly(tid, currentNlSysNum()).cacheJacobianNonlocal(Assembly::GlobalDataKey{});
}

void
SubProblem::cacheJacobianNeighbor(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum()).cacheJacobianNeighbor(Assembly::GlobalDataKey{});
}

void
SubProblem::addCachedJacobian(const THREAD_ID tid)
{
  assembly(tid, currentNlSysNum()).addCachedJacobian(Assembly::GlobalDataKey{});
}

void
SubProblem::preparePRefinement()
{
  std::unordered_set<FEFamily> disable_families;
  for (const auto & [family, flag] : _family_for_p_refinement)
    if (flag)
      disable_families.insert(family);

  for (const auto tid : make_range(libMesh::n_threads()))
    for (const auto s : make_range(numNonlinearSystems()))
      assembly(tid, s).havePRefinement(disable_families);

  auto & eq = es();
  for (const auto family : disable_families)
    for (const auto i : make_range(eq.n_systems()))
    {
      auto & system = eq.get_system(i);
      auto & dof_map = system.get_dof_map();
      for (const auto vg : make_range(system.n_variable_groups()))
      {
        const auto & var_group = system.variable_group(vg);
        if (var_group.type().family == family)
          dof_map.should_p_refine(vg, false);
      }
    }

  _have_p_refinement = true;
}

bool
SubProblem::doingPRefinement() const
{
  return mesh().doingPRefinement();
}

void
SubProblem::markFamilyPRefinement(const InputParameters & params)
{
  auto family = Utility::string_to_enum<FEFamily>(params.get<MooseEnum>("family"));
  bool flag = _default_families_without_p_refinement.count(family);
  if (params.isParamValid("disable_p_refinement"))
    flag = params.get<bool>("disable_p_refinement");

  auto [it, inserted] = _family_for_p_refinement.emplace(family, flag);
  if (!inserted && flag != it->second)
    mooseError("'disable_p_refinement' not set consistently for variables in ", family);
}

void
SubProblem::setCurrentLowerDElem(const Elem * const lower_d_elem, const THREAD_ID tid)
{
  for (const auto nl_sys_num : make_range(numNonlinearSystems()))
    assembly(tid, nl_sys_num).setCurrentLowerDElem(lower_d_elem);
}

template MooseVariableFEBase &
SubProblem::getVariableHelper(const THREAD_ID tid,
                              const std::string & var_name,
                              Moose::VarKindType expected_var_type,
                              Moose::VarFieldType expected_var_field_type,
                              const std::vector<std::shared_ptr<SolverSystem>> & nls,
                              const SystemBase & aux) const;
template MooseVariableFEBase &
SubProblem::getVariableHelper(const THREAD_ID tid,
                              const std::string & var_name,
                              Moose::VarKindType expected_var_type,
                              Moose::VarFieldType expected_var_field_type,
                              const std::vector<std::unique_ptr<DisplacedSystem>> & nls,
                              const SystemBase & aux) const;