From 0b14c471fc77cbcb93f435a46878b25f57741e0e Mon Sep 17 00:00:00 2001
From: Tom Joseph <tomjoseph@in.ibm.com>
Date: Sun, 30 Sep 2018 01:42:59 +0530
Subject: ldap: Add persistence for LDAP mapper D-Bus objects

Change-Id: Ib8979a7c655f74c332d80e7fb221ef03e9a3f83c
Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
---
 phosphor-ldap-mapper/ldap_mapper_serialize.cpp | 95 ++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 phosphor-ldap-mapper/ldap_mapper_serialize.cpp

(limited to 'phosphor-ldap-mapper/ldap_mapper_serialize.cpp')

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
-- 
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