Save persistent triggers to storage

Create json storage file for persistent triggers.
Handle persistent dbus property.
Save/remove persistent triggers on add/delete.
Cover code with UTs.

Tested:
   - Passed unit tests
   - Tested on QEMU
     * adding new valid and invalid trigger from cli
     * verifying if valid trigger is properly stored
     * deleting existed trigger from storage

Change-Id: I243326e84833a8cb22075fbf565573b62b205b4a
Signed-off-by: Cezary Zwolak <cezary.zwolak@intel.com>
Signed-off-by: Lukasz Kazmierczak <lukasz.kazmierczak@intel.com>
diff --git a/src/interfaces/trigger_factory.hpp b/src/interfaces/trigger_factory.hpp
index 7d448d0..d493b4a 100644
--- a/src/interfaces/trigger_factory.hpp
+++ b/src/interfaces/trigger_factory.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "interfaces/json_storage.hpp"
 #include "interfaces/trigger.hpp"
 #include "interfaces/trigger_manager.hpp"
 #include "interfaces/trigger_types.hpp"
@@ -26,7 +27,8 @@
             std::pair<sdbusplus::message::object_path, std::string>>& sensors,
         const std::vector<std::string>& reportNames,
         const TriggerThresholdParams& thresholdParams,
-        interfaces::TriggerManager& triggerManager) const = 0;
+        interfaces::TriggerManager& triggerManager,
+        interfaces::JsonStorage& triggerStorage) const = 0;
 };
 
 } // namespace interfaces
diff --git a/src/interfaces/trigger_types.hpp b/src/interfaces/trigger_types.hpp
index 90c673d..1833171 100644
--- a/src/interfaces/trigger_types.hpp
+++ b/src/interfaces/trigger_types.hpp
@@ -1,6 +1,8 @@
 #pragma once
 
 #include "utils/conversion.hpp"
+#include "utils/labeled_tuple.hpp"
+#include "utils/tstring.hpp"
 
 #include <string>
 #include <tuple>
@@ -38,6 +40,12 @@
 }
 
 using ThresholdParam = std::tuple<std::string, std::string, uint64_t, double>;
+
+using LabeledThresholdParam =
+    utils::LabeledTuple<std::tuple<std::string, Severity, uint64_t, double>,
+                        utils::tstring::UserId, utils::tstring::Severity,
+                        utils::tstring::DwellTime,
+                        utils::tstring::ThresholdValue>;
 } // namespace discrete
 
 namespace numeric
@@ -95,8 +103,22 @@
 }
 
 using ThresholdParam = std::tuple<std::string, uint64_t, std::string, double>;
+
+using LabeledThresholdParam =
+    utils::LabeledTuple<std::tuple<Type, uint64_t, Direction, double>,
+                        utils::tstring::Type, utils::tstring::DwellTime,
+                        utils::tstring::Direction,
+                        utils::tstring::ThresholdValue>;
 } // namespace numeric
 
+using TriggerSensors =
+    std::vector<std::pair<sdbusplus::message::object_path, std::string>>;
+
+using LabeledTriggerSensor =
+    utils::LabeledTuple<std::tuple<std::string, std::string>,
+                        utils::tstring::SensorPath,
+                        utils::tstring::SensorMetadata>;
+
 using TriggerThresholdParams =
     std::variant<std::vector<numeric::ThresholdParam>,
                  std::vector<discrete::ThresholdParam>>;
diff --git a/src/interfaces/types.hpp b/src/interfaces/types.hpp
index a5ed0db..a3a1b1c 100644
--- a/src/interfaces/types.hpp
+++ b/src/interfaces/types.hpp
@@ -28,4 +28,4 @@
 
 using Readings = std::tuple<
     uint64_t,
-    std::vector<std::tuple<std::string, std::string, double, uint64_t>>>;
+    std::vector<std::tuple<std::string, std::string, double, uint64_t>>>;
\ No newline at end of file
diff --git a/src/telemetry.hpp b/src/telemetry.hpp
index fb7f2a3..be2d81c 100644
--- a/src/telemetry.hpp
+++ b/src/telemetry.hpp
@@ -25,6 +25,9 @@
             objServer),
         triggerManager(std::make_unique<TriggerFactory>(
                            bus, objServer, sensorCache, reportManager),
+                       std::make_unique<PersistentJsonStorage>(
+                           interfaces::JsonStorage::DirectoryPath(
+                               "/var/lib/telemetry/Triggers")),
                        objServer)
     {}
 
diff --git a/src/trigger.cpp b/src/trigger.cpp
index 471ad10..2bba3ea 100644
--- a/src/trigger.cpp
+++ b/src/trigger.cpp
@@ -1,26 +1,44 @@
 #include "trigger.hpp"
 
 #include "interfaces/types.hpp"
+#include "utils/transform.hpp"
+
+#include <phosphor-logging/log.hpp>
+
+template <class... Ts>
+struct overloaded : Ts...
+{
+    using Ts::operator()...;
+};
+template <class... Ts>
+overloaded(Ts...) -> overloaded<Ts...>;
 
 Trigger::Trigger(
     boost::asio::io_context& ioc,
     const std::shared_ptr<sdbusplus::asio::object_server>& objServer,
-    const std::string& nameIn, const bool isDiscrete, const bool logToJournal,
-    const bool logToRedfish, const bool updateReport,
-    const std::vector<std::pair<sdbusplus::message::object_path, std::string>>&
-        sensorsIn,
+    const std::string& nameIn, const bool isDiscreteIn,
+    const bool logToJournalIn, const bool logToRedfishIn,
+    const bool updateReportIn, const TriggerSensors& sensorsIn,
     const std::vector<std::string>& reportNamesIn,
     const TriggerThresholdParams& thresholdParamsIn,
     std::vector<std::shared_ptr<interfaces::Threshold>>&& thresholdsIn,
-    interfaces::TriggerManager& triggerManager) :
+    interfaces::TriggerManager& triggerManager,
+    interfaces::JsonStorage& triggerStorageIn) :
     name(nameIn),
-    path(triggerDir + name), persistent(false), sensors(sensorsIn),
-    reportNames(reportNamesIn), thresholdParams(thresholdParamsIn),
-    thresholds(std::move(thresholdsIn))
+    isDiscrete(isDiscreteIn), logToJournal(logToJournalIn),
+    logToRedfish(logToRedfishIn), updateReport(updateReportIn),
+    path(triggerDir + name), sensors(sensorsIn), reportNames(reportNamesIn),
+    thresholdParams(thresholdParamsIn), thresholds(std::move(thresholdsIn)),
+    fileName(std::to_string(std::hash<std::string>{}(name))),
+    triggerStorage(triggerStorageIn)
 {
     deleteIface = objServer->add_unique_interface(
         path, deleteIfaceName, [this, &ioc, &triggerManager](auto& dbusIface) {
             dbusIface.register_method("Delete", [this, &ioc, &triggerManager] {
+                if (persistent)
+                {
+                    triggerStorage.remove(fileName);
+                }
                 boost::asio::post(ioc, [this, &triggerManager] {
                     triggerManager.removeTrigger(this);
                 });
@@ -29,12 +47,30 @@
 
     triggerIface = objServer->add_unique_interface(
         path, triggerIfaceName,
-        [this, isDiscrete, logToJournal, logToRedfish,
-         updateReport](auto& dbusIface) {
-            dbusIface.register_property_r(
+        [this, isDiscreteIn, logToJournalIn, logToRedfishIn,
+         updateReportIn](auto& dbusIface) {
+            persistent = storeConfiguration();
+            dbusIface.register_property_rw(
                 "Persistent", persistent,
                 sdbusplus::vtable::property_::emits_change,
-                [](const auto& x) { return x; });
+                [this](bool newVal, const auto&) {
+                    if (newVal == persistent)
+                    {
+                        return true;
+                    }
+                    if (newVal)
+                    {
+                        persistent = storeConfiguration();
+                    }
+                    else
+                    {
+                        triggerStorage.remove(fileName);
+                        persistent = false;
+                    }
+                    return true;
+                },
+                [this](const auto&) { return persistent; });
+
             dbusIface.register_property_r(
                 "Thresholds", thresholdParams,
                 sdbusplus::vtable::property_::emits_change,
@@ -65,3 +101,62 @@
         threshold->initialize();
     }
 }
+
+bool Trigger::storeConfiguration() const
+{
+    try
+    {
+        nlohmann::json data;
+
+        data["Version"] = triggerVersion;
+        data["Name"] = name;
+        data["ThresholdParamsDiscriminator"] = thresholdParams.index();
+        data["IsDiscrete"] = isDiscrete;
+        data["LogToJournal"] = logToJournal;
+        data["LogToRedfish"] = logToRedfish;
+        data["UpdateReport"] = updateReport;
+
+        std::visit(
+            overloaded{
+                [&](const std::vector<numeric::ThresholdParam>& arg) {
+                    data["ThresholdParams"] =
+                        utils::transform(arg, [](const auto& thresholdParam) {
+                            const auto& [type, dwellTime, direction,
+                                         thresholdValue] = thresholdParam;
+                            return numeric::LabeledThresholdParam(
+                                numeric::stringToType(type), dwellTime,
+                                numeric::stringToDirection(direction),
+                                thresholdValue);
+                        });
+                },
+                [&](const std::vector<discrete::ThresholdParam>& arg) {
+                    data["ThresholdParams"] =
+                        utils::transform(arg, [](const auto& thresholdParam) {
+                            const auto& [userId, severity, dwellTime,
+                                         thresholdValue] = thresholdParam;
+                            return discrete::LabeledThresholdParam(
+                                userId, discrete::stringToSeverity(severity),
+                                dwellTime, thresholdValue);
+                        });
+                },
+            },
+            thresholdParams);
+
+        data["ReportNames"] = reportNames;
+
+        data["Sensors"] = utils::transform(sensors, [](const auto& sensor) {
+            const auto& [sensorPath, sensorMetadata] = sensor;
+            return LabeledTriggerSensor(sensorPath, sensorMetadata);
+        });
+
+        triggerStorage.store(fileName, data);
+    }
+    catch (const std::exception& e)
+    {
+        phosphor::logging::log<phosphor::logging::level::ERR>(
+            "Failed to store a trigger in storage",
+            phosphor::logging::entry("EXCEPTION_MSG=%s", e.what()));
+        return false;
+    }
+    return true;
+}
\ No newline at end of file
diff --git a/src/trigger.hpp b/src/trigger.hpp
index 3405c5b..b2bdc1d 100644
--- a/src/trigger.hpp
+++ b/src/trigger.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "interfaces/json_storage.hpp"
 #include "interfaces/threshold.hpp"
 #include "interfaces/trigger.hpp"
 #include "interfaces/trigger_manager.hpp"
@@ -23,7 +24,8 @@
         const std::vector<std::string>& reportNames,
         const TriggerThresholdParams& thresholdParams,
         std::vector<std::shared_ptr<interfaces::Threshold>>&& thresholds,
-        interfaces::TriggerManager& triggerManager);
+        interfaces::TriggerManager& triggerManager,
+        interfaces::JsonStorage& triggerStorage);
 
     Trigger(const Trigger&) = delete;
     Trigger(Trigger&&) = delete;
@@ -40,18 +42,26 @@
         return path;
     }
 
+    bool storeConfiguration() const;
+
   private:
     const std::string name;
+    bool isDiscrete;
+    bool logToJournal;
+    bool logToRedfish;
+    bool updateReport;
     const std::string path;
-    bool persistent;
-    std::vector<std::pair<sdbusplus::message::object_path, std::string>>
-        sensors;
+    bool persistent = false;
+    TriggerSensors sensors;
     std::vector<std::string> reportNames;
     TriggerThresholdParams thresholdParams;
     std::unique_ptr<sdbusplus::asio::dbus_interface> deleteIface;
     std::unique_ptr<sdbusplus::asio::dbus_interface> triggerIface;
     std::vector<std::shared_ptr<interfaces::Threshold>> thresholds;
 
+    interfaces::JsonStorage::FilePath fileName;
+    interfaces::JsonStorage& triggerStorage;
+
   public:
     static constexpr const char* triggerIfaceName =
         "xyz.openbmc_project.Telemetry.Trigger";
@@ -59,4 +69,5 @@
         "/xyz/openbmc_project/Telemetry/Triggers/";
     static constexpr const char* deleteIfaceName =
         "xyz.openbmc_project.Object.Delete";
+    static constexpr size_t triggerVersion = 0;
 };
diff --git a/src/trigger_factory.cpp b/src/trigger_factory.cpp
index 3114e9a..e039e1f 100644
--- a/src/trigger_factory.cpp
+++ b/src/trigger_factory.cpp
@@ -17,14 +17,15 @@
     reportManager(reportManager)
 {}
 
-std::unique_ptr<interfaces::Trigger> TriggerFactory::make(
-    boost::asio::yield_context& yield, const std::string& name, bool isDiscrete,
-    bool logToJournal, bool logToRedfish, bool updateReport,
-    const std::vector<std::pair<sdbusplus::message::object_path, std::string>>&
-        sensorPaths,
-    const std::vector<std::string>& reportNames,
-    const TriggerThresholdParams& thresholdParams,
-    interfaces::TriggerManager& triggerManager) const
+std::unique_ptr<interfaces::Trigger>
+    TriggerFactory::make(boost::asio::yield_context& yield,
+                         const std::string& name, bool isDiscrete,
+                         bool logToJournal, bool logToRedfish,
+                         bool updateReport, const TriggerSensors& sensorPaths,
+                         const std::vector<std::string>& reportNames,
+                         const TriggerThresholdParams& thresholdParams,
+                         interfaces::TriggerManager& triggerManager,
+                         interfaces::JsonStorage& triggerStorage) const
 {
     auto [sensors, sensorNames] = getSensors(yield, sensorPaths);
     std::vector<std::shared_ptr<interfaces::Threshold>> thresholds;
@@ -121,7 +122,7 @@
     return std::make_unique<Trigger>(
         bus->get_io_context(), objServer, name, isDiscrete, logToJournal,
         logToRedfish, updateReport, sensorPaths, reportNames, thresholdParams,
-        std::move(thresholds), triggerManager);
+        std::move(thresholds), triggerManager, triggerStorage);
 }
 
 std::pair<std::vector<std::shared_ptr<interfaces::Sensor>>,
diff --git a/src/trigger_factory.hpp b/src/trigger_factory.hpp
index c1f2473..a6fbb68 100644
--- a/src/trigger_factory.hpp
+++ b/src/trigger_factory.hpp
@@ -23,7 +23,8 @@
             std::pair<sdbusplus::message::object_path, std::string>>& sensors,
         const std::vector<std::string>& reportNames,
         const TriggerThresholdParams& thresholdParams,
-        interfaces::TriggerManager& triggerManager) const override;
+        interfaces::TriggerManager& triggerManager,
+        interfaces::JsonStorage& triggerStorage) const override;
 
   private:
     std::shared_ptr<sdbusplus::asio::connection> bus;
diff --git a/src/trigger_manager.cpp b/src/trigger_manager.cpp
index bf372c2..3882022 100644
--- a/src/trigger_manager.cpp
+++ b/src/trigger_manager.cpp
@@ -2,8 +2,10 @@
 
 TriggerManager::TriggerManager(
     std::unique_ptr<interfaces::TriggerFactory> triggerFactoryIn,
+    std::unique_ptr<interfaces::JsonStorage> triggerStorageIn,
     const std::shared_ptr<sdbusplus::asio::object_server>& objServer) :
-    triggerFactory(std::move(triggerFactoryIn))
+    triggerFactory(std::move(triggerFactoryIn)),
+    triggerStorage(std::move(triggerStorageIn))
 {
     managerIface = objServer->add_unique_interface(
         triggerManagerPath, triggerManagerIfaceName, [this](auto& iface) {
@@ -36,7 +38,8 @@
 
                     triggers.emplace_back(triggerFactory->make(
                         yield, name, isDiscrete, logToJournal, logToRedfish,
-                        updateReport, sensors, reportNames, thresholds, *this));
+                        updateReport, sensors, reportNames, thresholds, *this,
+                        *triggerStorage));
                     return triggers.back()->getPath();
                 });
         });
diff --git a/src/trigger_manager.hpp b/src/trigger_manager.hpp
index 41257eb..1db6d73 100644
--- a/src/trigger_manager.hpp
+++ b/src/trigger_manager.hpp
@@ -14,6 +14,7 @@
   public:
     TriggerManager(
         std::unique_ptr<interfaces::TriggerFactory> triggerFactory,
+        std::unique_ptr<interfaces::JsonStorage> triggerStorage,
         const std::shared_ptr<sdbusplus::asio::object_server>& objServer);
 
     TriggerManager(TriggerManager&) = delete;
@@ -25,6 +26,7 @@
 
   private:
     std::unique_ptr<interfaces::TriggerFactory> triggerFactory;
+    std::unique_ptr<interfaces::JsonStorage> triggerStorage;
     std::unique_ptr<sdbusplus::asio::dbus_interface> managerIface;
     std::vector<std::unique_ptr<interfaces::Trigger>> triggers;
 
diff --git a/src/utils/tstring.hpp b/src/utils/tstring.hpp
index a8d3e90..5b17d98 100644
--- a/src/utils/tstring.hpp
+++ b/src/utils/tstring.hpp
@@ -24,6 +24,14 @@
     }
 };
 
+struct SensorMetadata
+{
+    static std::string str()
+    {
+        return "sensorMetadata";
+    }
+};
+
 struct OperationType
 {
     static std::string str()
@@ -56,5 +64,53 @@
     }
 };
 
+struct Type
+{
+    static std::string str()
+    {
+        return "type";
+    }
+};
+
+struct DwellTime
+{
+    static std::string str()
+    {
+        return "dwellTime";
+    }
+};
+
+struct Direction
+{
+    static std::string str()
+    {
+        return "direction";
+    }
+};
+
+struct ThresholdValue
+{
+    static std::string str()
+    {
+        return "thresholdValue";
+    }
+};
+
+struct UserId
+{
+    static std::string str()
+    {
+        return "userId";
+    }
+};
+
+struct Severity
+{
+    static std::string str()
+    {
+        return "severity";
+    }
+};
+
 } // namespace tstring
 } // namespace utils