include/event_service_store.hpp

#ifndef THIRD_PARTY_GBMCWEB_INCLUDE_EVENT_SERVICE_STORE_H_
#define THIRD_PARTY_GBMCWEB_INCLUDE_EVENT_SERVICE_STORE_H_

#include <cstdint>
#include <limits>
#include <memory>
#include <string>
#include <vector>

#include "boost/beast/http/fields.hpp"  // NOLINT
#include "boost/container/flat_map.hpp"  // NOLINT
#include "logging.hpp"
#include <nlohmann/json.hpp>

namespace persistent_data {

struct UserSubscription {
  // NOLINTBEGIN
  std::string id;
  std::string destinationUrl;
  std::string protocol;
  std::string retryPolicy;
  std::string customText;
  std::string eventFormatType;
  std::string subscriptionType;
  std::vector<std::string> registryMsgIds;
  std::vector<std::string> registryPrefixes;
  std::vector<std::string> resourceTypes;
  boost::beast::http::fields httpHeaders;
  std::vector<std::string> metricReportDefinitions;
  // NOLINTEND

  static std::shared_ptr<UserSubscription> fromJson(
      const nlohmann::json& j, const bool loadFromOldConfig = false) {
    std::shared_ptr<UserSubscription> subvalue =
        std::make_shared<UserSubscription>();
    for (const auto& element : j.items()) {
      if (element.key() == "Id") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->id = *value;
      } else if (element.key() == "Destination") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->destinationUrl = *value;
      } else if (element.key() == "Protocol") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->protocol = *value;
      } else if (element.key() == "DeliveryRetryPolicy") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->retryPolicy = *value;
      } else if (element.key() == "Context") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->customText = *value;
      } else if (element.key() == "EventFormatType") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->eventFormatType = *value;
      } else if (element.key() == "SubscriptionType") {
        const std::string* value =
            element.value().get_ptr<const std::string*>();
        if (value == nullptr) {
          continue;
        }
        subvalue->subscriptionType = *value;
      } else if (element.key() == "MessageIds") {
        const auto& obj = element.value();
        for (const auto& val : obj.items()) {
          const std::string* value = val.value().get_ptr<const std::string*>();
          if (value == nullptr) {
            continue;
          }
          subvalue->registryMsgIds.push_back(*value);
        }
      } else if (element.key() == "RegistryPrefixes") {
        const auto& obj = element.value();
        for (const auto& val : obj.items()) {
          const std::string* value = val.value().get_ptr<const std::string*>();
          if (value == nullptr) {
            continue;
          }
          subvalue->registryPrefixes.push_back(*value);
        }
      } else if (element.key() == "ResourceTypes") {
        const auto& obj = element.value();
        for (const auto& val : obj.items()) {
          const std::string* value = val.value().get_ptr<const std::string*>();
          if (value == nullptr) {
            continue;
          }
          subvalue->resourceTypes.push_back(*value);
        }
      } else if (element.key() == "HttpHeaders") {
        const auto& obj = element.value();
        for (const auto& val : obj.items()) {
          const std::string* value = val.value().get_ptr<const std::string*>();
          if (value == nullptr) {
            BMCWEB_LOG_ERROR << "Failed to parse value for key" << val.key();
            continue;
          }
          subvalue->httpHeaders.set(val.key(), *value);
        }
      } else if (element.key() == "MetricReportDefinitions") {
        const auto& obj = element.value();
        for (const auto& val : obj.items()) {
          const std::string* value = val.value().get_ptr<const std::string*>();
          if (value == nullptr) {
            continue;
          }
          subvalue->metricReportDefinitions.push_back(*value);
        }
      } else {
        BMCWEB_LOG_ERROR << "Got unexpected property reading persistent file: "
                         << element.key();
        continue;
      }
    }

    if ((subvalue->id.empty() && !loadFromOldConfig) ||
        subvalue->destinationUrl.empty() || subvalue->protocol.empty() ||
        subvalue->retryPolicy.empty() || subvalue->eventFormatType.empty() ||
        subvalue->subscriptionType.empty()) {
      BMCWEB_LOG_ERROR << "Subscription missing required field "
                          "information, refusing to restore";
      return nullptr;
    }

    return subvalue;
  }
};

struct EventServiceConfig {
  bool enabled = false;
  uint32_t retryAttempts = 3;          // NOLINT
  uint32_t retryTimeoutInterval = 30;  // NOLINT

  void fromJson(const nlohmann::json& j) {
    for (const auto& element : j.items()) {
      if (element.key() == "ServiceEnabled") {
        const bool* value = element.value().get_ptr<const bool*>();
        if (value == nullptr) {
          continue;
        }
        enabled = *value;
      } else if (element.key() == "DeliveryRetryAttempts") {
        const uint64_t* value = element.value().get_ptr<const uint64_t*>();
        if ((value == nullptr) ||
            (*value > std::numeric_limits<uint32_t>::max())) {
          continue;
        }
        retryAttempts = static_cast<uint32_t>(*value);
      } else if (element.key() == "DeliveryRetryIntervalSeconds") {
        const uint64_t* value = element.value().get_ptr<const uint64_t*>();
        if ((value == nullptr) ||
            (*value > std::numeric_limits<uint32_t>::max())) {
          continue;
        }
        retryTimeoutInterval = static_cast<uint32_t>(*value);
      }
    }
  }
};

class EventServiceStore {
 public:
  boost::container::flat_map<std::string, std::shared_ptr<UserSubscription>>
      subscriptionsConfigMap;             // NOLINT
  EventServiceConfig eventServiceConfig;  // NOLINT

  static EventServiceStore& getInstance() {
    static EventServiceStore eventServiceStore;  // NOLINT
    return eventServiceStore;
  }

  EventServiceConfig& getEventServiceConfig() { return eventServiceConfig; }
};

}  // namespace persistent_data

#endif  // THIRD_PARTY_GBMCWEB_INCLUDE_EVENT_SERVICE_STORE_H_