From 9b79f9f9537351b8ff63355f0f010b466206ecce Mon Sep 17 00:00:00 2001
From: Lukasz Mastalerz <lukasz.mastalerz@mudita.com>
Date: Thu, 17 Nov 2022 14:18:25 +0100
Subject: [PATCH] [CP-1666] DeviceInfo request should return "SerialNumber" for
 Harmony

Add reading serial number from emmc partition
Add serial number to body response for deviceInfo endpoint for Harmony
---
 .../deviceInfo/DeviceInfoEndpoint.cpp         | 25 ++++++++++++++++++-
 .../deviceInfo/DeviceInfoEndpoint.hpp         |  1 +
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/products/BellHybrid/services/desktop/endpoints/deviceInfo/DeviceInfoEndpoint.cpp b/products/BellHybrid/services/desktop/endpoints/deviceInfo/DeviceInfoEndpoint.cpp
index f376ef086eda2cdbc26c14156d36c2547ad71007..d574012dd586f68bb4cf25324ceff61a21a01ede 100644
--- a/products/BellHybrid/services/desktop/endpoints/deviceInfo/DeviceInfoEndpoint.cpp
+++ b/products/BellHybrid/services/desktop/endpoints/deviceInfo/DeviceInfoEndpoint.cpp
@@ -14,12 +14,34 @@
 #include <vector>
 #include <sys/statvfs.h>
 #include <purefs/filesystem_paths.hpp>
+#include <purefs/vfs_subsystem.hpp>
 
 #include <ctime>
+namespace
+{
+    constexpr auto DEVICE_NAME      = "emmc0sys1";
+    constexpr auto EMMC_SN_LENGTH   = 13;
+    constexpr auto EMMC_BUFFER_SIZE = 512;
+    constexpr auto SECTOR_TO_READ   = 2;
+    constexpr auto SECTOR_COUNT     = 1U;
+
+    std::string readSerialNumberFromEmmc()
+    {
+        char buffer[EMMC_BUFFER_SIZE];
+        purefs::subsystem::disk_mgr()->read(DEVICE_NAME, buffer, SECTOR_TO_READ, SECTOR_COUNT);
+        buffer[EMMC_SN_LENGTH] = '\0';
+        return std::string(buffer);
+    }
 
+} // namespace
 namespace sdesktop::endpoints
 {
 
+    auto DeviceInfoEndpoint::getSerialNumber() -> std::string
+    {
+        return readSerialNumberFromEmmc();
+    }
+
     auto DeviceInfoEndpoint::getDeviceInfo(Context &context) -> http::Code
     {
         auto [totalDeviceSpaceMiB, reservedSystemSpaceMiB, usedUserSpaceMiB] = getStorageInfo();
@@ -33,7 +55,8 @@ namespace sdesktop::endpoints
                                   {json::gitRevision, (std::string)(GIT_REV)},
                                   {json::gitBranch, (std::string)GIT_BRANCH},
                                   {json::currentRTCTime, std::to_string(static_cast<uint32_t>(std::time(nullptr)))},
-                                  {json::version, std::string(VERSION)}}));
+                                  {json::version, std::string(VERSION)},
+                                  {json::serialNumber, getSerialNumber()}}));
 
         return http::Code::OK;
     }
diff --git a/products/BellHybrid/services/desktop/endpoints/include/endpoints/deviceInfo/DeviceInfoEndpoint.hpp b/products/BellHybrid/services/desktop/endpoints/include/endpoints/deviceInfo/DeviceInfoEndpoint.hpp
index d32aa0d8864beca61d9a81bebee6a2ea861d8294..a11e497f3ec5ea9d657a037ac71de050bdbb8671 100644
--- a/products/BellHybrid/services/desktop/endpoints/include/endpoints/deviceInfo/DeviceInfoEndpoint.hpp
+++ b/products/BellHybrid/services/desktop/endpoints/include/endpoints/deviceInfo/DeviceInfoEndpoint.hpp
@@ -14,6 +14,7 @@ namespace sdesktop::endpoints
         explicit DeviceInfoEndpoint(sys::Service *ownerServicePtr) : DeviceInfoEndpointCommon(ownerServicePtr)
         {}
 
+        auto getSerialNumber() -> std::string;
         auto getDeviceInfo(Context &context) -> http::Code override;
     };