ldap: Add persistence for LDAP mapper D-Bus objects
Change-Id: Ib8979a7c655f74c332d80e7fb221ef03e9a3f83c
Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
diff --git a/phosphor-ldap-mapper/ldap_mapper_serialize.cpp b/phosphor-ldap-mapper/ldap_mapper_serialize.cpp
new file mode 100644
index 0000000..534e0a1
--- /dev/null
+++ b/phosphor-ldap-mapper/ldap_mapper_serialize.cpp
@@ -0,0 +1,95 @@
+#include <cereal/archives/binary.hpp>
+#include <cereal/types/string.hpp>
+#include <fstream>
+#include <phosphor-logging/log.hpp>
+#include "config.h"
+#include "ldap_mapper_serialize.hpp"
+
+// Register class version
+// From cereal documentation;
+// "This macro should be placed at global scope"
+CEREAL_CLASS_VERSION(phosphor::user::LDAPMapperEntry, CLASS_VERSION);
+
+namespace phosphor
+{
+namespace user
+{
+
+using namespace phosphor::logging;
+
+/** @brief Function required by Cereal to perform serialization.
+ *
+ * @tparam Archive - Cereal archive type (binary in this case).
+ * @param[in] archive - reference to cereal archive.
+ * @param[in] entry- const reference to LDAP mapper entry
+ * @param[in] version - Class version that enables handling a serialized data
+ * across code levels
+ */
+template <class Archive>
+void save(Archive& archive, const LDAPMapperEntry& entry,
+ const std::uint32_t version)
+{
+ archive(entry.groupName(), entry.privilege());
+}
+
+/** @brief Function required by Cereal to perform deserialization.
+ *
+ * @tparam Archive - Cereal archive type (binary in our case).
+ * @param[in] archive - reference to cereal archive.
+ * @param[out] entry - LDAP mapper entry to be read
+ * @param[in] version - Class version that enables handling a serialized data
+ * across code levels
+ */
+template <class Archive>
+void load(Archive& archive, LDAPMapperEntry& entry, const std::uint32_t version)
+{
+ std::string groupName{};
+ std::string privilege{};
+
+ archive(groupName, privilege);
+
+ entry.sdbusplus::xyz::openbmc_project::User::server::PrivilegeMapperEntry::
+ groupName(groupName, true);
+ entry.sdbusplus::xyz::openbmc_project::User::server::PrivilegeMapperEntry::
+ privilege(privilege, true);
+}
+
+fs::path serialize(const LDAPMapperEntry& entry, Id id)
+{
+ fs::path dir(LDAP_MAPPER_PERSIST_PATH);
+ auto path = dir / std::to_string(id);
+ std::ofstream os(path.c_str(), std::ios::binary);
+ cereal::BinaryOutputArchive oarchive(os);
+ oarchive(entry);
+ return path;
+}
+
+bool deserialize(const fs::path& path, LDAPMapperEntry& entry)
+{
+ try
+ {
+ if (fs::exists(path))
+ {
+ std::ifstream is(path.c_str(), std::ios::in | std::ios::binary);
+ cereal::BinaryInputArchive iarchive(is);
+ iarchive(entry);
+ return true;
+ }
+ return false;
+ }
+ catch (cereal::Exception& e)
+ {
+ log<level::ERR>(e.what());
+ fs::remove(path);
+ return false;
+ }
+ catch (const std::length_error& e)
+ {
+ log<level::ERR>(e.what());
+ fs::remove(path);
+ return false;
+ }
+}
+
+} // namespace user
+} // namespace phosphor