redfish-core/lib/sensors.hpp

/*
Copyright (c) 2018 Intel Corporation

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#pragma once

#include "app.hpp"
#include "dbus_singleton.hpp"
#include "dbus_utility.hpp"
#include "generated/enums/redundancy.hpp"
#include "generated/enums/resource.hpp"
#include "query.hpp"
#include "registries/privilege_registry.hpp"
#include "str_utility.hpp"
#include "utils/dbus_utils.hpp"
#include "utils/json_utils.hpp"
#include "utils/query_param.hpp"
#include "utils/sensor_utils.hpp"

#include <boost/system/error_code.hpp>
#include <boost/url/format.hpp>
#include <sdbusplus/asio/property.hpp>
#include <sdbusplus/unpack_properties.hpp>

#include <array>
#include <cmath>
#include <iterator>
#include <limits>
#include <map>
#include <ranges>
#include <set>
#include <string>
#include <string_view>
#include <utility>
#include <variant>

namespace redfish
{

namespace sensors
{

// clang-format off
namespace dbus
{
constexpr auto powerPaths = std::to_array<std::string_view>({
    "/xyz/openbmc_project/sensors/voltage",
    "/xyz/openbmc_project/sensors/power"
});

constexpr auto getSensorPaths(){
    if constexpr(BMCWEB_REDFISH_NEW_POWERSUBSYSTEM_THERMALSUBSYSTEM){
    return std::to_array<std::string_view>({
        "/xyz/openbmc_project/sensors/power",
        "/xyz/openbmc_project/sensors/current",
        "/xyz/openbmc_project/sensors/airflow",
        "/xyz/openbmc_project/sensors/humidity",
        "/xyz/openbmc_project/sensors/voltage",
        "/xyz/openbmc_project/sensors/fan_tach",
        "/xyz/openbmc_project/sensors/temperature",
        "/xyz/openbmc_project/sensors/fan_pwm",
        "/xyz/openbmc_project/sensors/altitude",
        "/xyz/openbmc_project/sensors/energy",
        "/xyz/openbmc_project/sensors/utilization"});
    } else {
      return  std::to_array<std::string_view>({"/xyz/openbmc_project/sensors/power",
        "/xyz/openbmc_project/sensors/current",
        "/xyz/openbmc_project/sensors/airflow",
        "/xyz/openbmc_project/sensors/humidity",
        "/xyz/openbmc_project/sensors/utilization"});
}
}

constexpr auto sensorPaths = getSensorPaths();

constexpr auto thermalPaths = std::to_array<std::string_view>({
    "/xyz/openbmc_project/sensors/fan_tach",
    "/xyz/openbmc_project/sensors/temperature",
    "/xyz/openbmc_project/sensors/fan_pwm"
});

} // namespace dbus
// clang-format on

constexpr std::string_view powerNodeStr = sensor_utils::chassisSubNodeToString(
    sensor_utils::ChassisSubNode::powerNode);
constexpr std::string_view sensorsNodeStr =
    sensor_utils::chassisSubNodeToString(
        sensor_utils::ChassisSubNode::sensorsNode);
constexpr std::string_view thermalNodeStr =
    sensor_utils::chassisSubNodeToString(
        sensor_utils::ChassisSubNode::thermalNode);

using sensorPair =
    std::pair<std::string_view, std::span<const std::string_view>>;
static constexpr std::array<sensorPair, 3> paths = {
    {{sensors::powerNodeStr, dbus::powerPaths},
     {sensors::sensorsNodeStr, dbus::sensorPaths},
     {sensors::thermalNodeStr, dbus::thermalPaths}}};

} // namespace sensors

/**
 * SensorsAsyncResp
 * Gathers data needed for response processing after async calls are done
 */
class SensorsAsyncResp
{
  public:
    using DataCompleteCb = std::function<void(
        const boost::beast::http::status status,
        const std::map<std::string, std::string>& uriToDbus)>;

    struct SensorData
    {
        std::string name;
        std::string uri;
        std::string dbusPath;
    };

    SensorsAsyncResp(const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn,
                     const std::string& chassisIdIn,
                     std::span<const std::string_view> typesIn,
                     std::string_view subNode) :
        asyncResp(asyncRespIn), chassisId(chassisIdIn), types(typesIn),
        chassisSubNode(subNode), efficientExpand(false)
    {}

    // Store extra data about sensor mapping and return it in callback
    SensorsAsyncResp(const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn,
                     const std::string& chassisIdIn,
                     std::span<const std::string_view> typesIn,
                     std::string_view subNode,
                     DataCompleteCb&& creationComplete) :
        asyncResp(asyncRespIn), chassisId(chassisIdIn), types(typesIn),
        chassisSubNode(subNode), efficientExpand(false),
        metadata{std::vector<SensorData>()},
        dataComplete{std::move(creationComplete)}
    {}

    // sensor collections expand
    SensorsAsyncResp(const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn,
                     const std::string& chassisIdIn,
                     std::span<const std::string_view> typesIn,
                     const std::string_view& subNode, bool efficientExpandIn) :
        asyncResp(asyncRespIn), chassisId(chassisIdIn), types(typesIn),
        chassisSubNode(subNode), efficientExpand(efficientExpandIn)
    {}

    ~SensorsAsyncResp()
    {
        if (asyncResp->res.result() ==
            boost::beast::http::status::internal_server_error)
        {
            // Reset the json object to clear out any data that made it in
            // before the error happened todo(ed) handle error condition with
            // proper code
            asyncResp->res.jsonValue = nlohmann::json::object();
        }

        if (dataComplete && metadata)
        {
            std::map<std::string, std::string> map;
            if (asyncResp->res.result() == boost::beast::http::status::ok)
            {
                for (auto& sensor : *metadata)
                {
                    map.emplace(sensor.uri, sensor.dbusPath);
                }
            }
            dataComplete(asyncResp->res.result(), map);
        }
    }

    SensorsAsyncResp(const SensorsAsyncResp&) = delete;
    SensorsAsyncResp(SensorsAsyncResp&&) = delete;
    SensorsAsyncResp& operator=(const SensorsAsyncResp&) = delete;
    SensorsAsyncResp& operator=(SensorsAsyncResp&&) = delete;

    void addMetadata(const nlohmann::json& sensorObject,
                     const std::string& dbusPath)
    {
        if (metadata)
        {
            metadata->emplace_back(SensorData{
                sensorObject["Name"], sensorObject["@odata.id"], dbusPath});
        }
    }

    void updateUri(const std::string& name, const std::string& uri)
    {
        if (metadata)
        {
            for (auto& sensor : *metadata)
            {
                if (sensor.name == name)
                {
                    sensor.uri = uri;
                }
            }
        }
    }

    const std::shared_ptr<bmcweb::AsyncResp> asyncResp;
    const std::string chassisId;
    const std::span<const std::string_view> types;
    const std::string chassisSubNode;
    const bool efficientExpand;

  private:
    std::optional<std::vector<SensorData>> metadata;
    DataCompleteCb dataComplete;
};

using InventoryItem = sensor_utils::InventoryItem;

/**
 * @brief Get objects with connection necessary for sensors
 * @param SensorsAsyncResp Pointer to object holding response data
 * @param sensorNames Sensors retrieved from chassis
 * @param callback Callback for processing gathered connections
 */
template <typename Callback>
void getObjectsWithConnection(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
    const std::shared_ptr<std::set<std::string>>& sensorNames,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getObjectsWithConnection enter");
    const std::string path = "/xyz/openbmc_project/sensors";
    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Sensor.Value"};

    // Make call to ObjectMapper to find all sensors objects
    dbus::utility::getSubTree(
        path, 2, interfaces,
        [callback = std::forward<Callback>(callback), sensorsAsyncResp,
         sensorNames](const boost::system::error_code& ec,
                      const dbus::utility::MapperGetSubTreeResponse& subtree) {
            // Response handler for parsing objects subtree
            BMCWEB_LOG_DEBUG("getObjectsWithConnection resp_handler enter");
            if (ec)
            {
                messages::internalError(sensorsAsyncResp->asyncResp->res);
                BMCWEB_LOG_ERROR(
                    "getObjectsWithConnection resp_handler: Dbus error {}", ec);
                return;
            }

            BMCWEB_LOG_DEBUG("Found {} subtrees", subtree.size());

            // Make unique list of connections only for requested sensor types
            // and found in the chassis
            std::set<std::string> connections;
            std::set<std::pair<std::string, std::string>> objectsWithConnection;

            BMCWEB_LOG_DEBUG("sensorNames list count: {}", sensorNames->size());
            for (const std::string& tsensor : *sensorNames)
            {
                BMCWEB_LOG_DEBUG("Sensor to find: {}", tsensor);
            }

            for (const std::pair<std::string,
                                 std::vector<std::pair<
                                     std::string, std::vector<std::string>>>>&
                     object : subtree)
            {
                if (sensorNames->find(object.first) != sensorNames->end())
                {
                    for (const std::pair<std::string, std::vector<std::string>>&
                             objData : object.second)
                    {
                        BMCWEB_LOG_DEBUG("Adding connection: {}",
                                         objData.first);
                        connections.insert(objData.first);
                        objectsWithConnection.insert(
                            std::make_pair(object.first, objData.first));
                    }
                }
            }
            BMCWEB_LOG_DEBUG("Found {} connections", connections.size());
            callback(std::move(connections), std::move(objectsWithConnection));
            BMCWEB_LOG_DEBUG("getObjectsWithConnection resp_handler exit");
        });
    BMCWEB_LOG_DEBUG("getObjectsWithConnection exit");
}

/**
 * @brief Create connections necessary for sensors
 * @param SensorsAsyncResp Pointer to object holding response data
 * @param sensorNames Sensors retrieved from chassis
 * @param callback Callback for processing gathered connections
 */
template <typename Callback>
void getConnections(std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
                    const std::shared_ptr<std::set<std::string>> sensorNames,
                    Callback&& callback)
{
    auto objectsWithConnectionCb =
        [callback = std::forward<Callback>(callback)](
            const std::set<std::string>& connections,
            const std::set<std::pair<std::string, std::string>>&
            /*objectsWithConnection*/) { callback(connections); };
    getObjectsWithConnection(sensorsAsyncResp, sensorNames,
                             std::move(objectsWithConnectionCb));
}

/**
 * @brief Shrinks the list of sensors for processing
 * @param SensorsAysncResp  The class holding the Redfish response
 * @param allSensors  A list of all the sensors associated to the
 * chassis element (i.e. baseboard, front panel, etc...)
 * @param activeSensors A list that is a reduction of the incoming
 * allSensors list.  Eliminate Thermal sensors when a Power request is
 * made, and eliminate Power sensors when a Thermal request is made.
 */
inline void reduceSensorList(
    crow::Response& res, std::string_view chassisSubNode,
    std::span<const std::string_view> sensorTypes,
    const std::vector<std::string>* allSensors,
    const std::shared_ptr<std::set<std::string>>& activeSensors)
{
    if ((allSensors == nullptr) || (activeSensors == nullptr))
    {
        messages::resourceNotFound(res, chassisSubNode,
                                   chassisSubNode == sensors::thermalNodeStr
                                       ? "Temperatures"
                                       : "Voltages");

        return;
    }
    if (allSensors->empty())
    {
        // Nothing to do, the activeSensors object is also empty
        return;
    }

    for (std::string_view type : sensorTypes)
    {
        for (const std::string& sensor : *allSensors)
        {
            if (sensor.starts_with(type))
            {
                activeSensors->emplace(sensor);
            }
        }
    }
}

/*
 *Populates the top level collection for a given subnode.  Populates
 *SensorCollection, Power, or Thermal schemas.
 *
 * */
inline void populateChassisNode(nlohmann::json& jsonValue,
                                std::string_view chassisSubNode)
{
    if (chassisSubNode == sensors::powerNodeStr)
    {
        jsonValue["@odata.type"] = "#Power.v1_5_2.Power";
    }
    else if (chassisSubNode == sensors::thermalNodeStr)
    {
        jsonValue["@odata.type"] = "#Thermal.v1_4_0.Thermal";
        jsonValue["Fans"] = nlohmann::json::array();
        jsonValue["Temperatures"] = nlohmann::json::array();
    }
    else if (chassisSubNode == sensors::sensorsNodeStr)
    {
        jsonValue["@odata.type"] = "#SensorCollection.SensorCollection";
        jsonValue["Description"] = "Collection of Sensors for this Chassis";
        jsonValue["Members"] = nlohmann::json::array();
        jsonValue["Members@odata.count"] = 0;
    }

    if (chassisSubNode != sensors::sensorsNodeStr)
    {
        jsonValue["Id"] = chassisSubNode;
    }
    jsonValue["Name"] = chassisSubNode;
}

/**
 * @brief Retrieves requested chassis sensors and redundancy data from DBus .
 * @param SensorsAsyncResp   Pointer to object holding response data
 * @param callback  Callback for next step in gathered sensor processing
 */
template <typename Callback>
void getChassis(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                std::string_view chassisId, std::string_view chassisSubNode,
                std::span<const std::string_view> sensorTypes,
                Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getChassis enter");
    constexpr std::array<std::string_view, 2> interfaces = {
        "xyz.openbmc_project.Inventory.Item.Board",
        "xyz.openbmc_project.Inventory.Item.Chassis"};

    // Get the Chassis Collection
    dbus::utility::getSubTreePaths(
        "/xyz/openbmc_project/inventory", 0, interfaces,
        [callback = std::forward<Callback>(callback), asyncResp,
         chassisIdStr{std::string(chassisId)},
         chassisSubNode{std::string(chassisSubNode)},
         sensorTypes](const boost::system::error_code& ec,
                      const dbus::utility::MapperGetSubTreePathsResponse&
                          chassisPaths) mutable {
            BMCWEB_LOG_DEBUG("getChassis respHandler enter");
            if (ec)
            {
                BMCWEB_LOG_ERROR("getChassis respHandler DBUS error: {}", ec);
                messages::internalError(asyncResp->res);
                return;
            }
            const std::string* chassisPath = nullptr;
            for (const std::string& chassis : chassisPaths)
            {
                sdbusplus::message::object_path path(chassis);
                std::string chassisName = path.filename();
                if (chassisName.empty())
                {
                    BMCWEB_LOG_ERROR("Failed to find '/' in {}", chassis);
                    continue;
                }
                if (chassisName == chassisIdStr)
                {
                    chassisPath = &chassis;
                    break;
                }
            }
            if (chassisPath == nullptr)
            {
                messages::resourceNotFound(asyncResp->res, "Chassis",
                                           chassisIdStr);
                return;
            }
            populateChassisNode(asyncResp->res.jsonValue, chassisSubNode);

            asyncResp->res.jsonValue["@odata.id"] = boost::urls::format(
                "/redfish/v1/Chassis/{}/{}", chassisIdStr, chassisSubNode);

            // Get the list of all sensors for this Chassis element
            std::string sensorPath = *chassisPath + "/all_sensors";
            dbus::utility::getAssociationEndPoints(
                sensorPath, [asyncResp, chassisSubNode, sensorTypes,
                             callback = std::forward<Callback>(callback)](
                                const boost::system::error_code& ec2,
                                const dbus::utility::MapperEndPoints&
                                    nodeSensorList) mutable {
                    if (ec2)
                    {
                        if (ec2.value() != EBADR)
                        {
                            messages::internalError(asyncResp->res);
                            return;
                        }
                    }
                    const std::shared_ptr<std::set<std::string>>
                        culledSensorList =
                            std::make_shared<std::set<std::string>>();
                    reduceSensorList(asyncResp->res, chassisSubNode,
                                     sensorTypes, &nodeSensorList,
                                     culledSensorList);
                    BMCWEB_LOG_DEBUG("Finishing with {}",
                                     culledSensorList->size());
                    callback(culledSensorList);
                });
        });
    BMCWEB_LOG_DEBUG("getChassis exit");
}

/**
 * @brief Builds a json sensor representation of a sensor.
 * @param sensorName  The name of the sensor to be built
 * @param sensorType  The type (temperature, fan_tach, etc) of the sensor to
 * build
 * @param chassisSubNode The subnode (thermal, sensor, etc) of the sensor
 * @param interfacesDict  A dictionary of the interfaces and properties of said
 * interfaces to be built from
 * @param sensorJson  The json object to fill
 * @param inventoryItem D-Bus inventory item associated with the sensor.  Will
 * be nullptr if no associated inventory item was found.
 */
inline void objectInterfacesToJson(
    const std::string& sensorName, const std::string& sensorType,
    const sensor_utils::ChassisSubNode chassisSubNode,
    const dbus::utility::DBusInterfacesMap& interfacesDict,
    nlohmann::json& sensorJson, InventoryItem* inventoryItem)
{
    for (const auto& [interface, valuesDict] : interfacesDict)
    {
        sensor_utils::objectPropertiesToJson(
            sensorName, sensorType, chassisSubNode, valuesDict, sensorJson,
            inventoryItem);
    }
    BMCWEB_LOG_DEBUG("Added sensor {}", sensorName);
}

inline void populateFanRedundancy(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
{
    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Control.FanRedundancy"};
    dbus::utility::getSubTree(
        "/xyz/openbmc_project/control", 2, interfaces,
        [sensorsAsyncResp](
            const boost::system::error_code& ec,
            const dbus::utility::MapperGetSubTreeResponse& resp) {
            if (ec)
            {
                return; // don't have to have this interface
            }
            for (const std::pair<std::string, dbus::utility::MapperServiceMap>&
                     pathPair : resp)
            {
                const std::string& path = pathPair.first;
                const dbus::utility::MapperServiceMap& objDict =
                    pathPair.second;
                if (objDict.empty())
                {
                    continue; // this should be impossible
                }

                const std::string& owner = objDict.begin()->first;
                dbus::utility::getAssociationEndPoints(
                    path + "/chassis",
                    [path, owner, sensorsAsyncResp](
                        const boost::system::error_code& ec2,
                        const dbus::utility::MapperEndPoints& endpoints) {
                        if (ec2)
                        {
                            return; // if they don't have an association we
                                    // can't tell what chassis is
                        }
                        auto found = std::ranges::find_if(
                            endpoints,
                            [sensorsAsyncResp](const std::string& entry) {
                                return entry.find(
                                           sensorsAsyncResp->chassisId) !=
                                       std::string::npos;
                            });

                        if (found == endpoints.end())
                        {
                            return;
                        }
                        sdbusplus::asio::getAllProperties(
                            *crow::connections::systemBus, owner, path,
                            "xyz.openbmc_project.Control.FanRedundancy",
                            [path, sensorsAsyncResp](
                                const boost::system::error_code& ec3,
                                const dbus::utility::DBusPropertiesMap& ret) {
                                if (ec3)
                                {
                                    return; // don't have to have this
                                            // interface
                                }

                                const uint8_t* allowedFailures = nullptr;
                                const std::vector<std::string>* collection =
                                    nullptr;
                                const std::string* status = nullptr;

                                const bool success =
                                    sdbusplus::unpackPropertiesNoThrow(
                                        dbus_utils::UnpackErrorPrinter(), ret,
                                        "AllowedFailures", allowedFailures,
                                        "Collection", collection, "Status",
                                        status);

                                if (!success)
                                {
                                    messages::internalError(
                                        sensorsAsyncResp->asyncResp->res);
                                    return;
                                }

                                if (allowedFailures == nullptr ||
                                    collection == nullptr || status == nullptr)
                                {
                                    BMCWEB_LOG_ERROR(
                                        "Invalid redundancy interface");
                                    messages::internalError(
                                        sensorsAsyncResp->asyncResp->res);
                                    return;
                                }

                                sdbusplus::message::object_path objectPath(
                                    path);
                                std::string name = objectPath.filename();
                                if (name.empty())
                                {
                                    // this should be impossible
                                    messages::internalError(
                                        sensorsAsyncResp->asyncResp->res);
                                    return;
                                }
                                std::ranges::replace(name, '_', ' ');

                                std::string health;

                                if (status->ends_with("Full"))
                                {
                                    health = "OK";
                                }
                                else if (status->ends_with("Degraded"))
                                {
                                    health = "Warning";
                                }
                                else
                                {
                                    health = "Critical";
                                }
                                nlohmann::json::array_t redfishCollection;
                                const auto& fanRedfish =
                                    sensorsAsyncResp->asyncResp->res
                                        .jsonValue["Fans"];
                                for (const std::string& item : *collection)
                                {
                                    sdbusplus::message::object_path itemPath(
                                        item);
                                    std::string itemName = itemPath.filename();
                                    if (itemName.empty())
                                    {
                                        continue;
                                    }
                                    /*
                                    todo(ed): merge patch that fixes the names
                                    std::replace(itemName.begin(),
                                                 itemName.end(), '_', ' ');*/
                                    auto schemaItem = std::ranges::find_if(
                                        fanRedfish,
                                        [itemName](const nlohmann::json& fan) {
                                            return fan["Name"] == itemName;
                                        });
                                    if (schemaItem != fanRedfish.end())
                                    {
                                        nlohmann::json::object_t collectionId;
                                        collectionId["@odata.id"] =
                                            (*schemaItem)["@odata.id"];
                                        redfishCollection.emplace_back(
                                            std::move(collectionId));
                                    }
                                    else
                                    {
                                        BMCWEB_LOG_ERROR(
                                            "failed to find fan in schema");
                                        messages::internalError(
                                            sensorsAsyncResp->asyncResp->res);
                                        return;
                                    }
                                }

                                size_t minNumNeeded =
                                    collection->empty()
                                        ? 0
                                        : collection->size() - *allowedFailures;
                                nlohmann::json& jResp =
                                    sensorsAsyncResp->asyncResp->res
                                        .jsonValue["Redundancy"];

                                nlohmann::json::object_t redundancy;
                                boost::urls::url url = boost::urls::format(
                                    "/redfish/v1/Chassis/{}/{}",
                                    sensorsAsyncResp->chassisId,
                                    sensorsAsyncResp->chassisSubNode);
                                url.set_fragment(
                                    ("/Redundancy"_json_pointer / jResp.size())
                                        .to_string());
                                redundancy["@odata.id"] = std::move(url);
                                redundancy["@odata.type"] =
                                    "#Redundancy.v1_3_2.Redundancy";
                                redundancy["MinNumNeeded"] = minNumNeeded;
                                redundancy["Mode"] =
                                    redundancy::RedundancyType::NPlusM;
                                redundancy["Name"] = name;
                                redundancy["RedundancySet"] = redfishCollection;
                                redundancy["Status"]["Health"] = health;
                                redundancy["Status"]["State"] =
                                    resource::State::Enabled;

                                jResp.emplace_back(std::move(redundancy));
                            });
                    });
            }
        });
}

inline void
    sortJSONResponse(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
{
    nlohmann::json& response = sensorsAsyncResp->asyncResp->res.jsonValue;
    std::array<std::string, 2> sensorHeaders{"Temperatures", "Fans"};
    if (sensorsAsyncResp->chassisSubNode == sensors::powerNodeStr)
    {
        sensorHeaders = {"Voltages", "PowerSupplies"};
    }
    for (const std::string& sensorGroup : sensorHeaders)
    {
        nlohmann::json::iterator entry = response.find(sensorGroup);
        if (entry != response.end())
        {
            std::sort(entry->begin(), entry->end(),
                      [](const nlohmann::json& c1, const nlohmann::json& c2) {
                          return c1["Name"] < c2["Name"];
                      });

            // add the index counts to the end of each entry
            size_t count = 0;
            for (nlohmann::json& sensorJson : *entry)
            {
                nlohmann::json::iterator odata = sensorJson.find("@odata.id");
                if (odata == sensorJson.end())
                {
                    continue;
                }
                std::string* value = odata->get_ptr<std::string*>();
                if (value != nullptr)
                {
                    *value += "/" + std::to_string(count);
                    sensorJson["MemberId"] = std::to_string(count);
                    count++;
                    sensorsAsyncResp->updateUri(sensorJson["Name"], *value);
                }
            }
        }
    }
}

/**
 * @brief Finds the inventory item with the specified object path.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param invItemObjPath D-Bus object path of inventory item.
 * @return Inventory item within vector, or nullptr if no match found.
 */
inline InventoryItem* findInventoryItem(
    const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
    const std::string& invItemObjPath)
{
    for (InventoryItem& inventoryItem : *inventoryItems)
    {
        if (inventoryItem.objectPath == invItemObjPath)
        {
            return &inventoryItem;
        }
    }
    return nullptr;
}

/**
 * @brief Finds the inventory item associated with the specified sensor.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param sensorObjPath D-Bus object path of sensor.
 * @return Inventory item within vector, or nullptr if no match found.
 */
inline InventoryItem* findInventoryItemForSensor(
    const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
    const std::string& sensorObjPath)
{
    for (InventoryItem& inventoryItem : *inventoryItems)
    {
        if (inventoryItem.sensors.contains(sensorObjPath))
        {
            return &inventoryItem;
        }
    }
    return nullptr;
}

/**
 * @brief Finds the inventory item associated with the specified led path.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param ledObjPath D-Bus object path of led.
 * @return Inventory item within vector, or nullptr if no match found.
 */
inline InventoryItem* findInventoryItemForLed(
    std::vector<InventoryItem>& inventoryItems, const std::string& ledObjPath)
{
    for (InventoryItem& inventoryItem : inventoryItems)
    {
        if (inventoryItem.ledObjectPath == ledObjPath)
        {
            return &inventoryItem;
        }
    }
    return nullptr;
}

/**
 * @brief Adds inventory item and associated sensor to specified vector.
 *
 * Adds a new InventoryItem to the vector if necessary.  Searches for an
 * existing InventoryItem with the specified object path.  If not found, one is
 * added to the vector.
 *
 * Next, the specified sensor is added to the set of sensors associated with the
 * InventoryItem.
 *
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param invItemObjPath D-Bus object path of inventory item.
 * @param sensorObjPath D-Bus object path of sensor
 */
inline void addInventoryItem(
    const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
    const std::string& invItemObjPath, const std::string& sensorObjPath)
{
    // Look for inventory item in vector
    InventoryItem* inventoryItem =
        findInventoryItem(inventoryItems, invItemObjPath);

    // If inventory item doesn't exist in vector, add it
    if (inventoryItem == nullptr)
    {
        inventoryItems->emplace_back(invItemObjPath);
        inventoryItem = &(inventoryItems->back());
    }

    // Add sensor to set of sensors associated with inventory item
    inventoryItem->sensors.emplace(sensorObjPath);
}

/**
 * @brief Stores D-Bus data in the specified inventory item.
 *
 * Finds D-Bus data in the specified map of interfaces.  Stores the data in the
 * specified InventoryItem.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * @param inventoryItem Inventory item where data will be stored.
 * @param interfacesDict Map containing D-Bus interfaces and their properties
 * for the specified inventory item.
 */
inline void storeInventoryItemData(
    InventoryItem& inventoryItem,
    const dbus::utility::DBusInterfacesMap& interfacesDict)
{
    // Get properties from Inventory.Item interface

    for (const auto& [interface, values] : interfacesDict)
    {
        if (interface == "xyz.openbmc_project.Inventory.Item")
        {
            for (const auto& [name, dbusValue] : values)
            {
                if (name == "Present")
                {
                    const bool* value = std::get_if<bool>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.isPresent = *value;
                    }
                }
            }
        }
        // Check if Inventory.Item.PowerSupply interface is present

        if (interface == "xyz.openbmc_project.Inventory.Item.PowerSupply")
        {
            inventoryItem.isPowerSupply = true;
        }

        // Get properties from Inventory.Decorator.Asset interface
        if (interface == "xyz.openbmc_project.Inventory.Decorator.Asset")
        {
            for (const auto& [name, dbusValue] : values)
            {
                if (name == "Manufacturer")
                {
                    const std::string* value =
                        std::get_if<std::string>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.manufacturer = *value;
                    }
                }
                if (name == "Model")
                {
                    const std::string* value =
                        std::get_if<std::string>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.model = *value;
                    }
                }
                if (name == "SerialNumber")
                {
                    const std::string* value =
                        std::get_if<std::string>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.serialNumber = *value;
                    }
                }
                if (name == "PartNumber")
                {
                    const std::string* value =
                        std::get_if<std::string>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.partNumber = *value;
                    }
                }
            }
        }

        if (interface ==
            "xyz.openbmc_project.State.Decorator.OperationalStatus")
        {
            for (const auto& [name, dbusValue] : values)
            {
                if (name == "Functional")
                {
                    const bool* value = std::get_if<bool>(&dbusValue);
                    if (value != nullptr)
                    {
                        inventoryItem.isFunctional = *value;
                    }
                }
            }
        }
    }
}

/**
 * @brief Gets D-Bus data for inventory items associated with sensors.
 *
 * Uses the specified connections (services) to obtain D-Bus data for inventory
 * items associated with sensors.  Stores the resulting data in the
 * inventoryItems vector.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * Finds the inventory item data asynchronously.  Invokes callback when data has
 * been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(void)
 *   @endcode
 *
 * This function is called recursively, obtaining data asynchronously from one
 * connection in each call.  This ensures the callback is not invoked until the
 * last asynchronous function has completed.
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param invConnections Connections that provide data for the inventory items.
 * implements ObjectManager.
 * @param callback Callback to invoke when inventory data has been obtained.
 * @param invConnectionsIndex Current index in invConnections.  Only specified
 * in recursive calls to this function.
 */
template <typename Callback>
void getInventoryItemsData(
    std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
    std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
    std::shared_ptr<std::set<std::string>> invConnections, Callback&& callback,
    size_t invConnectionsIndex = 0)
{
    BMCWEB_LOG_DEBUG("getInventoryItemsData enter");

    // If no more connections left, call callback
    if (invConnectionsIndex >= invConnections->size())
    {
        callback();
        BMCWEB_LOG_DEBUG("getInventoryItemsData exit");
        return;
    }

    // Get inventory item data from current connection
    auto it = invConnections->begin();
    std::advance(it, invConnectionsIndex);
    if (it != invConnections->end())
    {
        const std::string& invConnection = *it;

        // Get all object paths and their interfaces for current connection
        sdbusplus::message::object_path path("/xyz/openbmc_project/inventory");
        dbus::utility::getManagedObjects(
            invConnection, path,
            [sensorsAsyncResp, inventoryItems, invConnections,
             callback = std::forward<Callback>(callback), invConnectionsIndex](
                const boost::system::error_code& ec,
                const dbus::utility::ManagedObjectType& resp) mutable {
                BMCWEB_LOG_DEBUG("getInventoryItemsData respHandler enter");
                if (ec)
                {
                    BMCWEB_LOG_ERROR(
                        "getInventoryItemsData respHandler DBus error {}", ec);
                    messages::internalError(sensorsAsyncResp->asyncResp->res);
                    return;
                }

                // Loop through returned object paths
                for (const auto& objDictEntry : resp)
                {
                    const std::string& objPath =
                        static_cast<const std::string&>(objDictEntry.first);

                    // If this object path is one of the specified inventory
                    // items
                    InventoryItem* inventoryItem =
                        findInventoryItem(inventoryItems, objPath);
                    if (inventoryItem != nullptr)
                    {
                        // Store inventory data in InventoryItem
                        storeInventoryItemData(*inventoryItem,
                                               objDictEntry.second);
                    }
                }

                // Recurse to get inventory item data from next connection
                getInventoryItemsData(sensorsAsyncResp, inventoryItems,
                                      invConnections, std::move(callback),
                                      invConnectionsIndex + 1);

                BMCWEB_LOG_DEBUG("getInventoryItemsData respHandler exit");
            });
    }

    BMCWEB_LOG_DEBUG("getInventoryItemsData exit");
}

/**
 * @brief Gets connections that provide D-Bus data for inventory items.
 *
 * Gets the D-Bus connections (services) that provide data for the inventory
 * items that are associated with sensors.
 *
 * Finds the connections asynchronously.  Invokes callback when information has
 * been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(std::shared_ptr<std::set<std::string>> invConnections)
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param callback Callback to invoke when connections have been obtained.
 */
template <typename Callback>
void getInventoryItemsConnections(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
    const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getInventoryItemsConnections enter");

    const std::string path = "/xyz/openbmc_project/inventory";
    constexpr std::array<std::string_view, 4> interfaces = {
        "xyz.openbmc_project.Inventory.Item",
        "xyz.openbmc_project.Inventory.Item.PowerSupply",
        "xyz.openbmc_project.Inventory.Decorator.Asset",
        "xyz.openbmc_project.State.Decorator.OperationalStatus"};

    // Make call to ObjectMapper to find all inventory items
    dbus::utility::getSubTree(
        path, 0, interfaces,
        [callback = std::forward<Callback>(callback), sensorsAsyncResp,
         inventoryItems](
            const boost::system::error_code& ec,
            const dbus::utility::MapperGetSubTreeResponse& subtree) mutable {
            // Response handler for parsing output from GetSubTree
            BMCWEB_LOG_DEBUG("getInventoryItemsConnections respHandler enter");
            if (ec)
            {
                messages::internalError(sensorsAsyncResp->asyncResp->res);
                BMCWEB_LOG_ERROR(
                    "getInventoryItemsConnections respHandler DBus error {}",
                    ec);
                return;
            }

            // Make unique list of connections for desired inventory items
            std::shared_ptr<std::set<std::string>> invConnections =
                std::make_shared<std::set<std::string>>();

            // Loop through objects from GetSubTree
            for (const std::pair<std::string,
                                 std::vector<std::pair<
                                     std::string, std::vector<std::string>>>>&
                     object : subtree)
            {
                // Check if object path is one of the specified inventory items
                const std::string& objPath = object.first;
                if (findInventoryItem(inventoryItems, objPath) != nullptr)
                {
                    // Store all connections to inventory item
                    for (const std::pair<std::string, std::vector<std::string>>&
                             objData : object.second)
                    {
                        const std::string& invConnection = objData.first;
                        invConnections->insert(invConnection);
                    }
                }
            }

            callback(invConnections);
            BMCWEB_LOG_DEBUG("getInventoryItemsConnections respHandler exit");
        });
    BMCWEB_LOG_DEBUG("getInventoryItemsConnections exit");
}

/**
 * @brief Gets associations from sensors to inventory items.
 *
 * Looks for ObjectMapper associations from the specified sensors to related
 * inventory items. Then finds the associations from those inventory items to
 * their LEDs, if any.
 *
 * Finds the inventory items asynchronously.  Invokes callback when information
 * has been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param sensorNames All sensors within the current chassis.
 * implements ObjectManager.
 * @param callback Callback to invoke when inventory items have been obtained.
 */
template <typename Callback>
void getInventoryItemAssociations(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
    const std::shared_ptr<std::set<std::string>>& sensorNames,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getInventoryItemAssociations enter");

    // Call GetManagedObjects on the ObjectMapper to get all associations
    sdbusplus::message::object_path path("/");
    dbus::utility::getManagedObjects(
        "xyz.openbmc_project.ObjectMapper", path,
        [callback = std::forward<Callback>(callback), sensorsAsyncResp,
         sensorNames](const boost::system::error_code& ec,
                      const dbus::utility::ManagedObjectType& resp) mutable {
            BMCWEB_LOG_DEBUG("getInventoryItemAssociations respHandler enter");
            if (ec)
            {
                BMCWEB_LOG_ERROR(
                    "getInventoryItemAssociations respHandler DBus error {}",
                    ec);
                messages::internalError(sensorsAsyncResp->asyncResp->res);
                return;
            }

            // Create vector to hold list of inventory items
            std::shared_ptr<std::vector<InventoryItem>> inventoryItems =
                std::make_shared<std::vector<InventoryItem>>();

            // Loop through returned object paths
            std::string sensorAssocPath;
            sensorAssocPath.reserve(128); // avoid memory allocations
            for (const auto& objDictEntry : resp)
            {
                const std::string& objPath =
                    static_cast<const std::string&>(objDictEntry.first);

                // If path is inventory association for one of the specified
                // sensors
                for (const std::string& sensorName : *sensorNames)
                {
                    sensorAssocPath = sensorName;
                    sensorAssocPath += "/inventory";
                    if (objPath == sensorAssocPath)
                    {
                        // Get Association interface for object path
                        for (const auto& [interface, values] :
                             objDictEntry.second)
                        {
                            if (interface == "xyz.openbmc_project.Association")
                            {
                                for (const auto& [valueName, value] : values)
                                {
                                    if (valueName == "endpoints")
                                    {
                                        const std::vector<std::string>*
                                            endpoints = std::get_if<
                                                std::vector<std::string>>(
                                                &value);
                                        if ((endpoints != nullptr) &&
                                            !endpoints->empty())
                                        {
                                            // Add inventory item to vector
                                            const std::string& invItemPath =
                                                endpoints->front();
                                            addInventoryItem(inventoryItems,
                                                             invItemPath,
                                                             sensorName);
                                        }
                                    }
                                }
                            }
                        }
                        break;
                    }
                }
            }

            // Now loop through the returned object paths again, this time to
            // find the leds associated with the inventory items we just found
            std::string inventoryAssocPath;
            inventoryAssocPath.reserve(128); // avoid memory allocations
            for (const auto& objDictEntry : resp)
            {
                const std::string& objPath =
                    static_cast<const std::string&>(objDictEntry.first);

                for (InventoryItem& inventoryItem : *inventoryItems)
                {
                    inventoryAssocPath = inventoryItem.objectPath;
                    inventoryAssocPath += "/leds";
                    if (objPath == inventoryAssocPath)
                    {
                        for (const auto& [interface, values] :
                             objDictEntry.second)
                        {
                            if (interface == "xyz.openbmc_project.Association")
                            {
                                for (const auto& [valueName, value] : values)
                                {
                                    if (valueName == "endpoints")
                                    {
                                        const std::vector<std::string>*
                                            endpoints = std::get_if<
                                                std::vector<std::string>>(
                                                &value);
                                        if ((endpoints != nullptr) &&
                                            !endpoints->empty())
                                        {
                                            // Add inventory item to vector
                                            // Store LED path in inventory item
                                            const std::string& ledPath =
                                                endpoints->front();
                                            inventoryItem.ledObjectPath =
                                                ledPath;
                                        }
                                    }
                                }
                            }
                        }

                        break;
                    }
                }
            }
            callback(inventoryItems);
            BMCWEB_LOG_DEBUG("getInventoryItemAssociations respHandler exit");
        });

    BMCWEB_LOG_DEBUG("getInventoryItemAssociations exit");
}

/**
 * @brief Gets D-Bus data for inventory item leds associated with sensors.
 *
 * Uses the specified connections (services) to obtain D-Bus data for inventory
 * item leds associated with sensors.  Stores the resulting data in the
 * inventoryItems vector.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * Finds the inventory item led data asynchronously.  Invokes callback when data
 * has been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback()
 *   @endcode
 *
 * This function is called recursively, obtaining data asynchronously from one
 * connection in each call.  This ensures the callback is not invoked until the
 * last asynchronous function has completed.
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param ledConnections Connections that provide data for the inventory leds.
 * @param callback Callback to invoke when inventory data has been obtained.
 * @param ledConnectionsIndex Current index in ledConnections.  Only specified
 * in recursive calls to this function.
 */
template <typename Callback>
void getInventoryLedData(
    std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
    std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
    std::shared_ptr<std::map<std::string, std::string>> ledConnections,
    Callback&& callback, size_t ledConnectionsIndex = 0)
{
    BMCWEB_LOG_DEBUG("getInventoryLedData enter");

    // If no more connections left, call callback
    if (ledConnectionsIndex >= ledConnections->size())
    {
        callback();
        BMCWEB_LOG_DEBUG("getInventoryLedData exit");
        return;
    }

    // Get inventory item data from current connection
    auto it = ledConnections->begin();
    std::advance(it, ledConnectionsIndex);
    if (it != ledConnections->end())
    {
        const std::string& ledPath = (*it).first;
        const std::string& ledConnection = (*it).second;
        // Response handler for Get State property
        auto respHandler =
            [sensorsAsyncResp, inventoryItems, ledConnections, ledPath,
             callback = std::forward<Callback>(callback),
             ledConnectionsIndex](const boost::system::error_code& ec,
                                  const std::string& state) mutable {
                BMCWEB_LOG_DEBUG("getInventoryLedData respHandler enter");
                if (ec)
                {
                    BMCWEB_LOG_ERROR(
                        "getInventoryLedData respHandler DBus error {}", ec);
                    messages::internalError(sensorsAsyncResp->asyncResp->res);
                    return;
                }

                BMCWEB_LOG_DEBUG("Led state: {}", state);
                // Find inventory item with this LED object path
                InventoryItem* inventoryItem =
                    findInventoryItemForLed(*inventoryItems, ledPath);
                if (inventoryItem != nullptr)
                {
                    // Store LED state in InventoryItem
                    if (state.ends_with("On"))
                    {
                        inventoryItem->ledState = sensor_utils::LedState::ON;
                    }
                    else if (state.ends_with("Blink"))
                    {
                        inventoryItem->ledState = sensor_utils::LedState::BLINK;
                    }
                    else if (state.ends_with("Off"))
                    {
                        inventoryItem->ledState = sensor_utils::LedState::OFF;
                    }
                    else
                    {
                        inventoryItem->ledState =
                            sensor_utils::LedState::UNKNOWN;
                    }
                }

                // Recurse to get LED data from next connection
                getInventoryLedData(sensorsAsyncResp, inventoryItems,
                                    ledConnections, std::move(callback),
                                    ledConnectionsIndex + 1);

                BMCWEB_LOG_DEBUG("getInventoryLedData respHandler exit");
            };

        // Get the State property for the current LED
        sdbusplus::asio::getProperty<std::string>(
            *crow::connections::systemBus, ledConnection, ledPath,
            "xyz.openbmc_project.Led.Physical", "State",
            std::move(respHandler));
    }

    BMCWEB_LOG_DEBUG("getInventoryLedData exit");
}

/**
 * @brief Gets LED data for LEDs associated with given inventory items.
 *
 * Gets the D-Bus connections (services) that provide LED data for the LEDs
 * associated with the specified inventory items.  Then gets the LED data from
 * each connection and stores it in the inventory item.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * Finds the LED data asynchronously.  Invokes callback when information has
 * been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback()
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param callback Callback to invoke when inventory items have been obtained.
 */
template <typename Callback>
void getInventoryLeds(
    std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
    std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getInventoryLeds enter");

    const std::string path = "/xyz/openbmc_project";
    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Led.Physical"};

    // Make call to ObjectMapper to find all inventory items
    dbus::utility::getSubTree(
        path, 0, interfaces,
        [callback = std::forward<Callback>(callback), sensorsAsyncResp,
         inventoryItems](
            const boost::system::error_code& ec,
            const dbus::utility::MapperGetSubTreeResponse& subtree) mutable {
            // Response handler for parsing output from GetSubTree
            BMCWEB_LOG_DEBUG("getInventoryLeds respHandler enter");
            if (ec)
            {
                messages::internalError(sensorsAsyncResp->asyncResp->res);
                BMCWEB_LOG_ERROR("getInventoryLeds respHandler DBus error {}",
                                 ec);
                return;
            }

            // Build map of LED object paths to connections
            std::shared_ptr<std::map<std::string, std::string>> ledConnections =
                std::make_shared<std::map<std::string, std::string>>();

            // Loop through objects from GetSubTree
            for (const std::pair<std::string,
                                 std::vector<std::pair<
                                     std::string, std::vector<std::string>>>>&
                     object : subtree)
            {
                // Check if object path is LED for one of the specified
                // inventory items
                const std::string& ledPath = object.first;
                if (findInventoryItemForLed(*inventoryItems, ledPath) !=
                    nullptr)
                {
                    // Add mapping from ledPath to connection
                    const std::string& connection =
                        object.second.begin()->first;
                    (*ledConnections)[ledPath] = connection;
                    BMCWEB_LOG_DEBUG("Added mapping {} -> {}", ledPath,
                                     connection);
                }
            }

            getInventoryLedData(sensorsAsyncResp, inventoryItems,
                                ledConnections, std::move(callback));
            BMCWEB_LOG_DEBUG("getInventoryLeds respHandler exit");
        });
    BMCWEB_LOG_DEBUG("getInventoryLeds exit");
}

/**
 * @brief Gets D-Bus data for Power Supply Attributes such as EfficiencyPercent
 *
 * Uses the specified connections (services) (currently assumes just one) to
 * obtain D-Bus data for Power Supply Attributes. Stores the resulting data in
 * the inventoryItems vector. Only stores data in Power Supply inventoryItems.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * Finds the Power Supply Attributes data asynchronously.  Invokes callback
 * when data has been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param psAttributesConnections Connections that provide data for the Power
 *        Supply Attributes
 * @param callback Callback to invoke when data has been obtained.
 */
template <typename Callback>
void getPowerSupplyAttributesData(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
    std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
    const std::map<std::string, std::string>& psAttributesConnections,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getPowerSupplyAttributesData enter");

    if (psAttributesConnections.empty())
    {
        BMCWEB_LOG_DEBUG("Can't find PowerSupplyAttributes, no connections!");
        callback(inventoryItems);
        return;
    }

    // Assuming just one connection (service) for now
    auto it = psAttributesConnections.begin();

    const std::string& psAttributesPath = (*it).first;
    const std::string& psAttributesConnection = (*it).second;

    // Response handler for Get DeratingFactor property
    auto respHandler = [sensorsAsyncResp, inventoryItems,
                        callback = std::forward<Callback>(callback)](
                           const boost::system::error_code& ec,
                           uint32_t value) mutable {
        BMCWEB_LOG_DEBUG("getPowerSupplyAttributesData respHandler enter");
        if (ec)
        {
            BMCWEB_LOG_ERROR(
                "getPowerSupplyAttributesData respHandler DBus error {}", ec);
            messages::internalError(sensorsAsyncResp->asyncResp->res);
            return;
        }

        BMCWEB_LOG_DEBUG("PS EfficiencyPercent value: {}", value);
        // Store value in Power Supply Inventory Items
        for (InventoryItem& inventoryItem : *inventoryItems)
        {
            if (inventoryItem.isPowerSupply)
            {
                inventoryItem.powerSupplyEfficiencyPercent =
                    static_cast<int>(value);
            }
        }

        BMCWEB_LOG_DEBUG("getPowerSupplyAttributesData respHandler exit");
        callback(inventoryItems);
    };

    // Get the DeratingFactor property for the PowerSupplyAttributes
    // Currently only property on the interface/only one we care about
    sdbusplus::asio::getProperty<uint32_t>(
        *crow::connections::systemBus, psAttributesConnection, psAttributesPath,
        "xyz.openbmc_project.Control.PowerSupplyAttributes", "DeratingFactor",
        std::move(respHandler));

    BMCWEB_LOG_DEBUG("getPowerSupplyAttributesData exit");
}

/**
 * @brief Gets the Power Supply Attributes such as EfficiencyPercent
 *
 * Gets the D-Bus connection (service) that provides Power Supply Attributes
 * data. Then gets the Power Supply Attributes data from the connection
 * (currently just assumes 1 connection) and stores the data in the inventory
 * item.
 *
 * This data is later used to provide sensor property values in the JSON
 * response. DeratingFactor on D-Bus is mapped to EfficiencyPercent on Redfish.
 *
 * Finds the Power Supply Attributes data asynchronously. Invokes callback
 * when information has been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param inventoryItems D-Bus inventory items associated with sensors.
 * @param callback Callback to invoke when data has been obtained.
 */
template <typename Callback>
void getPowerSupplyAttributes(
    std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
    std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
    Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getPowerSupplyAttributes enter");

    // Only need the power supply attributes when the Power Schema
    if (sensorsAsyncResp->chassisSubNode != sensors::powerNodeStr)
    {
        BMCWEB_LOG_DEBUG("getPowerSupplyAttributes exit since not Power");
        callback(inventoryItems);
        return;
    }

    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Control.PowerSupplyAttributes"};

    // Make call to ObjectMapper to find the PowerSupplyAttributes service
    dbus::utility::getSubTree(
        "/xyz/openbmc_project", 0, interfaces,
        [callback = std::forward<Callback>(callback), sensorsAsyncResp,
         inventoryItems](
            const boost::system::error_code& ec,
            const dbus::utility::MapperGetSubTreeResponse& subtree) mutable {
            // Response handler for parsing output from GetSubTree
            BMCWEB_LOG_DEBUG("getPowerSupplyAttributes respHandler enter");
            if (ec)
            {
                messages::internalError(sensorsAsyncResp->asyncResp->res);
                BMCWEB_LOG_ERROR(
                    "getPowerSupplyAttributes respHandler DBus error {}", ec);
                return;
            }
            if (subtree.empty())
            {
                BMCWEB_LOG_DEBUG("Can't find Power Supply Attributes!");
                callback(inventoryItems);
                return;
            }

            // Currently we only support 1 power supply attribute, use this for
            // all the power supplies. Build map of object path to connection.
            // Assume just 1 connection and 1 path for now.
            std::map<std::string, std::string> psAttributesConnections;

            if (subtree[0].first.empty() || subtree[0].second.empty())
            {
                BMCWEB_LOG_DEBUG("Power Supply Attributes mapper error!");
                callback(inventoryItems);
                return;
            }

            const std::string& psAttributesPath = subtree[0].first;
            const std::string& connection = subtree[0].second.begin()->first;

            if (connection.empty())
            {
                BMCWEB_LOG_DEBUG("Power Supply Attributes mapper error!");
                callback(inventoryItems);
                return;
            }

            psAttributesConnections[psAttributesPath] = connection;
            BMCWEB_LOG_DEBUG("Added mapping {} -> {}", psAttributesPath,
                             connection);

            getPowerSupplyAttributesData(sensorsAsyncResp, inventoryItems,
                                         psAttributesConnections,
                                         std::move(callback));
            BMCWEB_LOG_DEBUG("getPowerSupplyAttributes respHandler exit");
        });
    BMCWEB_LOG_DEBUG("getPowerSupplyAttributes exit");
}

/**
 * @brief Gets inventory items associated with sensors.
 *
 * Finds the inventory items that are associated with the specified sensors.
 * Then gets D-Bus data for the inventory items, such as presence and VPD.
 *
 * This data is later used to provide sensor property values in the JSON
 * response.
 *
 * Finds the inventory items asynchronously.  Invokes callback when the
 * inventory items have been obtained.
 *
 * The callback must have the following signature:
 *   @code
 *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
 *   @endcode
 *
 * @param sensorsAsyncResp Pointer to object holding response data.
 * @param sensorNames All sensors within the current chassis.
 * implements ObjectManager.
 * @param callback Callback to invoke when inventory items have been obtained.
 */
template <typename Callback>
inline void
    getInventoryItems(std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
                      const std::shared_ptr<std::set<std::string>> sensorNames,
                      Callback&& callback)
{
    BMCWEB_LOG_DEBUG("getInventoryItems enter");
    auto getInventoryItemAssociationsCb =
        [sensorsAsyncResp, callback = std::forward<Callback>(callback)](
            std::shared_ptr<std::vector<InventoryItem>>
                inventoryItems) mutable {
            BMCWEB_LOG_DEBUG("getInventoryItemAssociationsCb enter");
            auto getInventoryItemsConnectionsCb =
                [sensorsAsyncResp, inventoryItems,
                 callback = std::forward<Callback>(callback)](
                    std::shared_ptr<std::set<std::string>>
                        invConnections) mutable {
                    BMCWEB_LOG_DEBUG("getInventoryItemsConnectionsCb enter");
                    auto getInventoryItemsDataCb =
                        [sensorsAsyncResp, inventoryItems,
                         callback =
                             std::forward<Callback>(callback)]() mutable {
                            BMCWEB_LOG_DEBUG("getInventoryItemsDataCb enter");

                            auto getInventoryLedsCb =
                                [sensorsAsyncResp, inventoryItems,
                                 callback = std::forward<Callback>(
                                     callback)]() mutable {
                                    BMCWEB_LOG_DEBUG(
                                        "getInventoryLedsCb enter");
                                    // Find Power Supply Attributes and get the
                                    // data
                                    getPowerSupplyAttributes(
                                        sensorsAsyncResp, inventoryItems,
                                        std::move(callback));
                                    BMCWEB_LOG_DEBUG("getInventoryLedsCb exit");
                                };

                            // Find led connections and get the data
                            getInventoryLeds(sensorsAsyncResp, inventoryItems,
                                             std::move(getInventoryLedsCb));
                            BMCWEB_LOG_DEBUG("getInventoryItemsDataCb exit");
                        };

                    // Get inventory item data from connections
                    getInventoryItemsData(sensorsAsyncResp, inventoryItems,
                                          invConnections,
                                          std::move(getInventoryItemsDataCb));
                    BMCWEB_LOG_DEBUG("getInventoryItemsConnectionsCb exit");
                };

            // Get connections that provide inventory item data
            getInventoryItemsConnections(
                sensorsAsyncResp, inventoryItems,
                std::move(getInventoryItemsConnectionsCb));
            BMCWEB_LOG_DEBUG("getInventoryItemAssociationsCb exit");
        };

    // Get associations from sensors to inventory items
    getInventoryItemAssociations(sensorsAsyncResp, sensorNames,
                                 std::move(getInventoryItemAssociationsCb));
    BMCWEB_LOG_DEBUG("getInventoryItems exit");
}

/**
 * @brief Returns JSON PowerSupply object for the specified inventory item.
 *
 * Searches for a JSON PowerSupply object that matches the specified inventory
 * item.  If one is not found, a new PowerSupply object is added to the JSON
 * array.
 *
 * Multiple sensors are often associated with one power supply inventory item.
 * As a result, multiple sensor values are stored in one JSON PowerSupply
 * object.
 *
 * @param powerSupplyArray JSON array containing Redfish PowerSupply objects.
 * @param inventoryItem Inventory item for the power supply.
 * @param chassisId Chassis that contains the power supply.
 * @return JSON PowerSupply object for the specified inventory item.
 */
inline nlohmann::json& getPowerSupply(nlohmann::json& powerSupplyArray,
                                      const InventoryItem& inventoryItem,
                                      const std::string& chassisId)
{
    std::string nameS;
    nameS.resize(inventoryItem.name.size());
    std::ranges::replace_copy(inventoryItem.name, nameS.begin(), '_', ' ');
    // Check if matching PowerSupply object already exists in JSON array
    for (nlohmann::json& powerSupply : powerSupplyArray)
    {
        nlohmann::json::iterator nameIt = powerSupply.find("Name");
        if (nameIt == powerSupply.end())
        {
            continue;
        }
        const std::string* name = nameIt->get_ptr<std::string*>();
        if (name == nullptr)
        {
            continue;
        }
        if (nameS == *name)
        {
            return powerSupply;
        }
    }

    // Add new PowerSupply object to JSON array
    powerSupplyArray.push_back({});
    nlohmann::json& powerSupply = powerSupplyArray.back();
    boost::urls::url url =
        boost::urls::format("/redfish/v1/Chassis/{}/Power", chassisId);
    url.set_fragment(("/PowerSupplies"_json_pointer).to_string());
    powerSupply["@odata.id"] = std::move(url);
    std::string escaped;
    escaped.resize(inventoryItem.name.size());
    std::ranges::replace_copy(inventoryItem.name, escaped.begin(), '_', ' ');
    powerSupply["Name"] = std::move(escaped);
    powerSupply["Manufacturer"] = inventoryItem.manufacturer;
    powerSupply["Model"] = inventoryItem.model;
    powerSupply["PartNumber"] = inventoryItem.partNumber;
    powerSupply["SerialNumber"] = inventoryItem.serialNumber;
    sensor_utils::setLedState(powerSupply, &inventoryItem);

    if (inventoryItem.powerSupplyEfficiencyPercent >= 0)
    {
        powerSupply["EfficiencyPercent"] =
            inventoryItem.powerSupplyEfficiencyPercent;
    }

    powerSupply["Status"]["State"] =
        sensor_utils::getState(&inventoryItem, true);
    const char* health = inventoryItem.isFunctional ? "OK" : "Critical";
    powerSupply["Status"]["Health"] = health;

    return powerSupply;
}

/**
 * @brief Gets the values of the specified sensors.
 *
 * Stores the results as JSON in the SensorsAsyncResp.
 *
 * Gets the sensor values asynchronously.  Stores the results later when the
 * information has been obtained.
 *
 * The sensorNames set contains all requested sensors for the current chassis.
 *
 * To minimize the number of DBus calls, the DBus method
 * org.freedesktop.DBus.ObjectManager.GetManagedObjects() is used to get the
 * values of all sensors provided by a connection (service).
 *
 * The connections set contains all the connections that provide sensor values.
 *
 * The InventoryItem vector contains D-Bus inventory items associated with the
 * sensors.  Inventory item data is needed for some Redfish sensor properties.
 *
 * @param SensorsAsyncResp Pointer to object holding response data.
 * @param sensorNames All requested sensors within the current chassis.
 * @param connections Connections that provide sensor values.
 * implements ObjectManager.
 * @param inventoryItems Inventory items associated with the sensors.
 */
inline void getSensorData(
    const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
    const std::shared_ptr<std::set<std::string>>& sensorNames,
    const std::set<std::string>& connections,
    const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems)
{
    BMCWEB_LOG_DEBUG("getSensorData enter");
    // Get managed objects from all services exposing sensors
    for (const std::string& connection : connections)
    {
        sdbusplus::message::object_path sensorPath(
            "/xyz/openbmc_project/sensors");
        dbus::utility::getManagedObjects(
            connection, sensorPath,
            [sensorsAsyncResp, sensorNames,
             inventoryItems](const boost::system::error_code& ec,
                             const dbus::utility::ManagedObjectType& resp) {
                BMCWEB_LOG_DEBUG("getManagedObjectsCb enter");
                if (ec)
                {
                    BMCWEB_LOG_ERROR("getManagedObjectsCb DBUS error: {}", ec);
                    messages::internalError(sensorsAsyncResp->asyncResp->res);
                    return;
                }
                auto chassisSubNode = sensor_utils::chassisSubNodeFromString(
                    sensorsAsyncResp->chassisSubNode);
                // Go through all objects and update response with sensor data
                for (const auto& objDictEntry : resp)
                {
                    const std::string& objPath =
                        static_cast<const std::string&>(objDictEntry.first);
                    BMCWEB_LOG_DEBUG("getManagedObjectsCb parsing object {}",
                                     objPath);

                    std::vector<std::string> split;
                    // Reserve space for
                    // /xyz/openbmc_project/sensors/<name>/<subname>
                    split.reserve(6);
                    // NOLINTNEXTLINE
                    bmcweb::split(split, objPath, '/');
                    if (split.size() < 6)
                    {
                        BMCWEB_LOG_ERROR("Got path that isn't long enough {}",
                                         objPath);
                        continue;
                    }
                    // These indexes aren't intuitive, as split puts an empty
                    // string at the beginning
                    const std::string& sensorType = split[4];
                    const std::string& sensorName = split[5];
                    BMCWEB_LOG_DEBUG("sensorName {} sensorType {}", sensorName,
                                     sensorType);
                    if (sensorNames->find(objPath) == sensorNames->end())
                    {
                        BMCWEB_LOG_DEBUG("{} not in sensor list ", sensorName);
                        continue;
                    }

                    // Find inventory item (if any) associated with sensor
                    InventoryItem* inventoryItem =
                        findInventoryItemForSensor(inventoryItems, objPath);

                    const std::string& sensorSchema =
                        sensorsAsyncResp->chassisSubNode;

                    nlohmann::json* sensorJson = nullptr;

                    if (sensorSchema == sensors::sensorsNodeStr &&
                        !sensorsAsyncResp->efficientExpand)
                    {
                        std::string sensorId =
                            redfish::sensor_utils::getSensorId(sensorName,
                                                               sensorType);

                        sensorsAsyncResp->asyncResp->res
                            .jsonValue["@odata.id"] = boost::urls::format(
                            "/redfish/v1/Chassis/{}/{}/{}",
                            sensorsAsyncResp->chassisId,
                            sensorsAsyncResp->chassisSubNode, sensorId);
                        sensorJson =
                            &(sensorsAsyncResp->asyncResp->res.jsonValue);
                    }
                    else
                    {
                        std::string fieldName;
                        if (sensorsAsyncResp->efficientExpand)
                        {
                            fieldName = "Members";
                        }
                        else if (sensorType == "temperature")
                        {
                            fieldName = "Temperatures";
                        }
                        else if (sensorType == "fan" ||
                                 sensorType == "fan_tach" ||
                                 sensorType == "fan_pwm")
                        {
                            fieldName = "Fans";
                        }
                        else if (sensorType == "voltage")
                        {
                            fieldName = "Voltages";
                        }
                        else if (sensorType == "power")
                        {
                            if (sensorName == "total_power")
                            {
                                fieldName = "PowerControl";
                            }
                            else if ((inventoryItem != nullptr) &&
                                     (inventoryItem->isPowerSupply))
                            {
                                fieldName = "PowerSupplies";
                            }
                            else
                            {
                                // Other power sensors are in SensorCollection
                                continue;
                            }
                        }
                        else
                        {
                            BMCWEB_LOG_ERROR(
                                "Unsure how to handle sensorType {}",
                                sensorType);
                            continue;
                        }

                        nlohmann::json& tempArray =
                            sensorsAsyncResp->asyncResp->res
                                .jsonValue[fieldName];
                        if (fieldName == "PowerControl")
                        {
                            if (tempArray.empty())
                            {
                                // Put multiple "sensors" into a single
                                // PowerControl. Follows MemberId naming and
                                // naming in power.hpp.
                                nlohmann::json::object_t power;
                                boost::urls::url url = boost::urls::format(
                                    "/redfish/v1/Chassis/{}/{}",
                                    sensorsAsyncResp->chassisId,
                                    sensorsAsyncResp->chassisSubNode);
                                url.set_fragment(
                                    (""_json_pointer / fieldName / "0")
                                        .to_string());
                                power["@odata.id"] = std::move(url);
                                tempArray.emplace_back(std::move(power));
                            }
                            sensorJson = &(tempArray.back());
                        }
                        else if (fieldName == "PowerSupplies")
                        {
                            if (inventoryItem != nullptr)
                            {
                                sensorJson = &(getPowerSupply(
                                    tempArray, *inventoryItem,
                                    sensorsAsyncResp->chassisId));
                            }
                        }
                        else if (fieldName == "Members")
                        {
                            std::string sensorId =
                                redfish::sensor_utils::getSensorId(sensorName,
                                                                   sensorType);

                            nlohmann::json::object_t member;
                            member["@odata.id"] = boost::urls::format(
                                "/redfish/v1/Chassis/{}/{}/{}",
                                sensorsAsyncResp->chassisId,
                                sensorsAsyncResp->chassisSubNode, sensorId);
                            tempArray.emplace_back(std::move(member));
                            sensorJson = &(tempArray.back());
                        }
                        else
                        {
                            nlohmann::json::object_t member;
                            boost::urls::url url = boost::urls::format(
                                "/redfish/v1/Chassis/{}/{}",
                                sensorsAsyncResp->chassisId,
                                sensorsAsyncResp->chassisSubNode);
                            url.set_fragment(
                                (""_json_pointer / fieldName).to_string());
                            member["@odata.id"] = std::move(url);
                            tempArray.emplace_back(std::move(member));
                            sensorJson = &(tempArray.back());
                        }
                    }

                    if (sensorJson != nullptr)
                    {
                        objectInterfacesToJson(
                            sensorName, sensorType, chassisSubNode,
                            objDictEntry.second, *sensorJson, inventoryItem);

                        std::string path = "/xyz/openbmc_project/sensors/";
                        path += sensorType;
                        path += "/";
                        path += sensorName;
                        sensorsAsyncResp->addMetadata(*sensorJson, path);
                    }
                }
                if (sensorsAsyncResp.use_count() == 1)
                {
                    sortJSONResponse(sensorsAsyncResp);
                    if (chassisSubNode ==
                            sensor_utils::ChassisSubNode::sensorsNode &&
                        sensorsAsyncResp->efficientExpand)
                    {
                        sensorsAsyncResp->asyncResp->res
                            .jsonValue["Members@odata.count"] =
                            sensorsAsyncResp->asyncResp->res
                                .jsonValue["Members"]
                                .size();
                    }
                    else if (chassisSubNode ==
                             sensor_utils::ChassisSubNode::thermalNode)
                    {
                        populateFanRedundancy(sensorsAsyncResp);
                    }
                }
                BMCWEB_LOG_DEBUG("getManagedObjectsCb exit");
            });
    }
    BMCWEB_LOG_DEBUG("getSensorData exit");
}

inline void
    processSensorList(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
                      const std::shared_ptr<std::set<std::string>>& sensorNames)
{
    auto getConnectionCb = [sensorsAsyncResp, sensorNames](
                               const std::set<std::string>& connections) {
        BMCWEB_LOG_DEBUG("getConnectionCb enter");
        auto getInventoryItemsCb =
            [sensorsAsyncResp, sensorNames, connections](
                const std::shared_ptr<std::vector<InventoryItem>>&
                    inventoryItems) mutable {
                BMCWEB_LOG_DEBUG("getInventoryItemsCb enter");
                // Get sensor data and store results in JSON
                getSensorData(sensorsAsyncResp, sensorNames, connections,
                              inventoryItems);
                BMCWEB_LOG_DEBUG("getInventoryItemsCb exit");
            };

        // Get inventory items associated with sensors
        getInventoryItems(sensorsAsyncResp, sensorNames,
                          std::move(getInventoryItemsCb));

        BMCWEB_LOG_DEBUG("getConnectionCb exit");
    };

    // Get set of connections that provide sensor values
    getConnections(sensorsAsyncResp, sensorNames, std::move(getConnectionCb));
}

/**
 * @brief Entry point for retrieving sensors data related to requested
 *        chassis.
 * @param SensorsAsyncResp   Pointer to object holding response data
 */
inline void
    getChassisData(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
{
    BMCWEB_LOG_DEBUG("getChassisData enter");
    auto getChassisCb =
        [sensorsAsyncResp](
            const std::shared_ptr<std::set<std::string>>& sensorNames) {
            BMCWEB_LOG_DEBUG("getChassisCb enter");
            processSensorList(sensorsAsyncResp, sensorNames);
            BMCWEB_LOG_DEBUG("getChassisCb exit");
        };
    // SensorCollection doesn't contain the Redundancy property
    if (sensorsAsyncResp->chassisSubNode != sensors::sensorsNodeStr)
    {
        sensorsAsyncResp->asyncResp->res.jsonValue["Redundancy"] =
            nlohmann::json::array();
    }
    // Get set of sensors in chassis
    getChassis(sensorsAsyncResp->asyncResp, sensorsAsyncResp->chassisId,
               sensorsAsyncResp->chassisSubNode, sensorsAsyncResp->types,
               std::move(getChassisCb));
    BMCWEB_LOG_DEBUG("getChassisData exit");
}

/**
 * @brief Find the requested sensorName in the list of all sensors supplied by
 * the chassis node
 *
 * @param sensorName   The sensor name supplied in the PATCH request
 * @param sensorsList  The list of sensors managed by the chassis node
 * @param sensorsModified  The list of sensors that were found as a result of
 *                         repeated calls to this function
 */
inline bool findSensorNameUsingSensorPath(
    std::string_view sensorName, const std::set<std::string>& sensorsList,
    std::set<std::string>& sensorsModified)
{
    for (const auto& chassisSensor : sensorsList)
    {
        sdbusplus::message::object_path path(chassisSensor);
        std::string thisSensorName = path.filename();
        if (thisSensorName.empty())
        {
            continue;
        }
        if (thisSensorName == sensorName)
        {
            sensorsModified.emplace(chassisSensor);
            return true;
        }
    }
    return false;
}

/**
 * @brief Entry point for overriding sensor values of given sensor
 *
 * @param sensorAsyncResp   response object
 * @param allCollections   Collections extract from sensors' request patch info
 * @param chassisSubNode   Chassis Node for which the query has to happen
 */
inline void setSensorsOverride(
    const std::shared_ptr<SensorsAsyncResp>& sensorAsyncResp,
    std::unordered_map<std::string, std::vector<nlohmann::json::object_t>>&
        allCollections)
{
    BMCWEB_LOG_INFO("setSensorsOverride for subNode{}",
                    sensorAsyncResp->chassisSubNode);

    std::string_view propertyValueName;
    std::unordered_map<std::string, std::pair<double, std::string>> overrideMap;
    std::string memberId;
    double value = 0.0;
    for (auto& collectionItems : allCollections)
    {
        if (collectionItems.first == "Temperatures")
        {
            propertyValueName = "ReadingCelsius";
        }
        else if (collectionItems.first == "Fans")
        {
            propertyValueName = "Reading";
        }
        else
        {
            propertyValueName = "ReadingVolts";
        }
        for (auto& item : collectionItems.second)
        {
            if (!json_util::readJsonObject(
                    item, sensorAsyncResp->asyncResp->res, "MemberId", memberId,
                    propertyValueName, value))
            {
                return;
            }
            overrideMap.emplace(memberId,
                                std::make_pair(value, collectionItems.first));
        }
    }

    auto getChassisSensorListCb = [sensorAsyncResp, overrideMap,
                                   propertyValueNameStr =
                                       std::string(propertyValueName)](
                                      const std::shared_ptr<
                                          std::set<std::string>>& sensorsList) {
        // Match sensor names in the PATCH request to those managed by the
        // chassis node
        const std::shared_ptr<std::set<std::string>> sensorNames =
            std::make_shared<std::set<std::string>>();
        for (const auto& item : overrideMap)
        {
            const auto& sensor = item.first;
            std::pair<std::string, std::string> sensorNameType =
                redfish::sensor_utils::splitSensorNameAndType(sensor);
            if (!findSensorNameUsingSensorPath(sensorNameType.second,
                                               *sensorsList, *sensorNames))
            {
                BMCWEB_LOG_INFO("Unable to find memberId {}", item.first);
                messages::resourceNotFound(sensorAsyncResp->asyncResp->res,
                                           item.second.second, item.first);
                return;
            }
        }
        // Get the connection to which the memberId belongs
        auto getObjectsWithConnectionCb = [sensorAsyncResp, overrideMap,
                                           propertyValueNameStr](
                                              const std::set<
                                                  std::string>& /*connections*/,
                                              const std::set<std::pair<
                                                  std::string, std::string>>&
                                                  objectsWithConnection) {
            if (objectsWithConnection.size() != overrideMap.size())
            {
                BMCWEB_LOG_INFO(
                    "Unable to find all objects with proper connection {} requested {}",
                    objectsWithConnection.size(), overrideMap.size());
                messages::resourceNotFound(
                    sensorAsyncResp->asyncResp->res,
                    sensorAsyncResp->chassisSubNode == sensors::thermalNodeStr
                        ? "Temperatures"
                        : "Voltages",
                    "Count");
                return;
            }
            for (const auto& item : objectsWithConnection)
            {
                sdbusplus::message::object_path path(item.first);
                std::string sensorName = path.filename();
                if (sensorName.empty())
                {
                    messages::internalError(sensorAsyncResp->asyncResp->res);
                    return;
                }
                std::string id = redfish::sensor_utils::getSensorId(
                    sensorName, path.parent_path().filename());

                const auto& iterator = overrideMap.find(id);
                if (iterator == overrideMap.end())
                {
                    BMCWEB_LOG_INFO("Unable to find sensor object{}",
                                    item.first);
                    messages::internalError(sensorAsyncResp->asyncResp->res);
                    return;
                }
                setDbusProperty(sensorAsyncResp->asyncResp,
                                propertyValueNameStr, item.second, item.first,
                                "xyz.openbmc_project.Sensor.Value", "Value",
                                iterator->second.first);
            }
        };
        // Get object with connection for the given sensor name
        getObjectsWithConnection(sensorAsyncResp, sensorNames,
                                 std::move(getObjectsWithConnectionCb));
    };
    // get full sensor list for the given chassisId and cross verify the sensor.
    getChassis(sensorAsyncResp->asyncResp, sensorAsyncResp->chassisId,
               sensorAsyncResp->chassisSubNode, sensorAsyncResp->types,
               std::move(getChassisSensorListCb));
}

/**
 * @brief Retrieves mapping of Redfish URIs to sensor value property to D-Bus
 * path of the sensor.
 *
 * Function builds valid Redfish response for sensor query of given chassis and
 * node. It then builds metadata about Redfish<->D-Bus correlations and provides
 * it to caller in a callback.
 *
 * @param chassis   Chassis for which retrieval should be performed
 * @param node  Node (group) of sensors. See sensor_utils::node for supported
 * values
 * @param mapComplete   Callback to be called with retrieval result
 */
template <typename Callback>
inline void retrieveUriToDbusMap(
    const std::string& chassis, const std::string& node, Callback&& mapComplete)
{
    decltype(sensors::paths)::const_iterator pathIt =
        std::find_if(sensors::paths.cbegin(), sensors::paths.cend(),
                     [&node](auto&& val) { return val.first == node; });
    if (pathIt == sensors::paths.cend())
    {
        BMCWEB_LOG_ERROR("Wrong node provided : {}", node);
        std::map<std::string, std::string> noop;
        mapComplete(boost::beast::http::status::bad_request, noop);
        return;
    }

    auto asyncResp = std::make_shared<bmcweb::AsyncResp>();
    auto callback =
        [asyncResp, mapCompleteCb = std::forward<Callback>(mapComplete)](
            const boost::beast::http::status status,
            const std::map<std::string, std::string>& uriToDbus) {
            mapCompleteCb(status, uriToDbus);
        };

    auto resp = std::make_shared<SensorsAsyncResp>(
        asyncResp, chassis, pathIt->second, node, std::move(callback));
    getChassisData(resp);
}

namespace sensors
{

inline void getChassisCallback(
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
    std::string_view chassisId, std::string_view chassisSubNode,
    const std::shared_ptr<std::set<std::string>>& sensorNames)
{
    BMCWEB_LOG_DEBUG("getChassisCallback enter ");

    nlohmann::json& entriesArray = asyncResp->res.jsonValue["Members"];
    for (const std::string& sensor : *sensorNames)
    {
        BMCWEB_LOG_DEBUG("Adding sensor: {}", sensor);

        sdbusplus::message::object_path path(sensor);
        std::string sensorName = path.filename();
        if (sensorName.empty())
        {
            BMCWEB_LOG_ERROR("Invalid sensor path: {}", sensor);
            messages::internalError(asyncResp->res);
            return;
        }
        std::string type = path.parent_path().filename();
        std::string id = redfish::sensor_utils::getSensorId(sensorName, type);

        nlohmann::json::object_t member;
        member["@odata.id"] = boost::urls::format(
            "/redfish/v1/Chassis/{}/{}/{}", chassisId, chassisSubNode, id);

        entriesArray.emplace_back(std::move(member));
    }

    asyncResp->res.jsonValue["Members@odata.count"] = entriesArray.size();
    BMCWEB_LOG_DEBUG("getChassisCallback exit");
}

inline void handleSensorCollectionGet(
    App& app, const crow::Request& req,
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
    const std::string& chassisId)
{
    query_param::QueryCapabilities capabilities = {
        .canDelegateExpandLevel = 1,
    };
    query_param::Query delegatedQuery;
    if (!redfish::setUpRedfishRouteWithDelegation(app, req, asyncResp,
                                                  delegatedQuery, capabilities))
    {
        return;
    }

    if (delegatedQuery.expandType != query_param::ExpandType::None)
    {
        // we perform efficient expand.
        auto sensorsAsyncResp = std::make_shared<SensorsAsyncResp>(
            asyncResp, chassisId, sensors::dbus::sensorPaths,
            sensors::sensorsNodeStr,
            /*efficientExpand=*/true);
        getChassisData(sensorsAsyncResp);

        BMCWEB_LOG_DEBUG(
            "SensorCollection doGet exit via efficient expand handler");
        return;
    }

    // We get all sensors as hyperlinkes in the chassis (this
    // implies we reply on the default query parameters handler)
    getChassis(asyncResp, chassisId, sensors::sensorsNodeStr, dbus::sensorPaths,
               std::bind_front(sensors::getChassisCallback, asyncResp,
                               chassisId, sensors::sensorsNodeStr));
}

inline void
    getSensorFromDbus(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                      const std::string& sensorPath,
                      const ::dbus::utility::MapperGetObject& mapperResponse)
{
    if (mapperResponse.size() != 1)
    {
        messages::internalError(asyncResp->res);
        return;
    }
    const auto& valueIface = *mapperResponse.begin();
    const std::string& connectionName = valueIface.first;
    BMCWEB_LOG_DEBUG("Looking up {}", connectionName);
    BMCWEB_LOG_DEBUG("Path {}", sensorPath);

    sdbusplus::asio::getAllProperties(
        *crow::connections::systemBus, connectionName, sensorPath, "",
        [asyncResp,
         sensorPath](const boost::system::error_code& ec,
                     const ::dbus::utility::DBusPropertiesMap& valuesDict) {
            if (ec)
            {
                messages::internalError(asyncResp->res);
                return;
            }
            sdbusplus::message::object_path path(sensorPath);
            std::string name = path.filename();
            path = path.parent_path();
            std::string type = path.filename();
            sensor_utils::objectPropertiesToJson(
                name, type, sensor_utils::ChassisSubNode::sensorsNode,
                valuesDict, asyncResp->res.jsonValue, nullptr);
        });
}

inline void handleSensorGet(App& app, const crow::Request& req,
                            const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                            const std::string& chassisId,
                            const std::string& sensorId)
{
    if (!redfish::setUpRedfishRoute(app, req, asyncResp))
    {
        return;
    }
    std::pair<std::string, std::string> nameType =
        redfish::sensor_utils::splitSensorNameAndType(sensorId);
    if (nameType.first.empty() || nameType.second.empty())
    {
        messages::resourceNotFound(asyncResp->res, sensorId, "Sensor");
        return;
    }

    asyncResp->res.jsonValue["@odata.id"] = boost::urls::format(
        "/redfish/v1/Chassis/{}/Sensors/{}", chassisId, sensorId);

    BMCWEB_LOG_DEBUG("Sensor doGet enter");

    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Sensor.Value"};
    std::string sensorPath = "/xyz/openbmc_project/sensors/" + nameType.first +
                             '/' + nameType.second;
    // Get a list of all of the sensors that implement Sensor.Value
    // and get the path and service name associated with the sensor
    ::dbus::utility::getDbusObject(
        sensorPath, interfaces,
        [asyncResp, sensorId,
         sensorPath](const boost::system::error_code& ec,
                     const ::dbus::utility::MapperGetObject& subtree) {
            BMCWEB_LOG_DEBUG("respHandler1 enter");
            if (ec == boost::system::errc::io_error)
            {
                BMCWEB_LOG_WARNING("Sensor not found from getSensorPaths");
                messages::resourceNotFound(asyncResp->res, sensorId, "Sensor");
                return;
            }
            if (ec)
            {
                messages::internalError(asyncResp->res);
                BMCWEB_LOG_ERROR(
                    "Sensor getSensorPaths resp_handler: Dbus error {}", ec);
                return;
            }
            getSensorFromDbus(asyncResp, sensorPath, subtree);
            BMCWEB_LOG_DEBUG("respHandler1 exit");
        });
}

} // namespace sensors

inline void requestRoutesSensorCollection(App& app)
{
    BMCWEB_ROUTE(app, "/redfish/v1/Chassis/<str>/Sensors/")
        .privileges(redfish::privileges::getSensorCollection)
        .methods(boost::beast::http::verb::get)(
            std::bind_front(sensors::handleSensorCollectionGet, std::ref(app)));
}

inline void requestRoutesSensor(App& app)
{
    BMCWEB_ROUTE(app, "/redfish/v1/Chassis/<str>/Sensors/<str>/")
        .privileges(redfish::privileges::getSensor)
        .methods(boost::beast::http::verb::get)(
            std::bind_front(sensors::handleSensorGet, std::ref(app)));
}

} // namespace redfish