From 105093278c2e6c3e8622a9e041458fd72e565793 Mon Sep 17 00:00:00 2001
From: Serhii Salamakha <serhii.salamakha@gmail.com>
Date: Sat, 2 Sep 2023 02:55:08 +0300
Subject: [PATCH] [Telink] Turn off  the CHIP_FACTORY_RESET_ERASE_NVS by
 Default (#28947)

---
 config/telink/chip-module/Kconfig             |  2 +-
 .../telink/common/src/AppTaskCommon.cpp       | 60 ++++++++-----------
 2 files changed, 26 insertions(+), 36 deletions(-)

diff --git a/config/telink/chip-module/Kconfig b/config/telink/chip-module/Kconfig
index fcd205102f22aa..325eb4172f198c 100644
--- a/config/telink/chip-module/Kconfig
+++ b/config/telink/chip-module/Kconfig
@@ -147,7 +147,7 @@ endif #CHIP_FACTORY_DATA_BUILD
 # See config/zephyr/Kconfig for full definition
 config CHIP_FACTORY_RESET_ERASE_NVS
 	bool
-	default y
+	default n
 
 config CHIP_LOG_SIZE_OPTIMIZATION
 	bool "Disable some detailed logs to decrease flash usage"
diff --git a/examples/platform/telink/common/src/AppTaskCommon.cpp b/examples/platform/telink/common/src/AppTaskCommon.cpp
index a64e2c7d5bf2e2..3a831ea0ef8fce 100644
--- a/examples/platform/telink/common/src/AppTaskCommon.cpp
+++ b/examples/platform/telink/common/src/AppTaskCommon.cpp
@@ -39,10 +39,8 @@
 #include <app/InteractionModelEngine.h>
 #endif
 
-#ifdef CONFIG_CHIP_FACTORY_RESET_ERASE_NVS
 #include <zephyr/fs/nvs.h>
 #include <zephyr/settings/settings.h>
-#endif
 
 using namespace chip::app;
 
@@ -103,10 +101,11 @@ Button sThreadStartButton;
 k_timer sFactoryResetTimer;
 uint8_t sFactoryResetCntr = 0;
 
-bool sIsThreadProvisioned = false;
-bool sIsThreadEnabled     = false;
-bool sIsThreadAttached    = false;
-bool sHaveBLEConnections  = false;
+bool sIsCommissioningFailed = false;
+bool sIsThreadProvisioned   = false;
+bool sIsThreadEnabled       = false;
+bool sIsThreadAttached      = false;
+bool sHaveBLEConnections    = false;
 
 #if APP_SET_DEVICE_INFO_PROVIDER
 chip::DeviceLayer::DeviceInfoProviderImpl gExampleDeviceInfoProvider;
@@ -138,9 +137,10 @@ class AppCallbacks : public AppDelegate
     bool isComissioningStarted;
 
 public:
-    void OnCommissioningSessionEstablishmentStarted() {}
+    void OnCommissioningSessionEstablishmentStarted() override { sIsCommissioningFailed = false; }
     void OnCommissioningSessionStarted() override { isComissioningStarted = true; }
     void OnCommissioningSessionStopped() override { isComissioningStarted = false; }
+    void OnCommissioningSessionEstablishmentError(CHIP_ERROR err) override { sIsCommissioningFailed = true; }
     void OnCommissioningWindowClosed() override
     {
         if (!isComissioningStarted)
@@ -157,44 +157,33 @@ class AppFabricTableDelegate : public FabricTable::Delegate
     {
         if (chip::Server::GetInstance().GetFabricTable().FabricCount() == 0)
         {
-            bool isBasicCommissioningMode = chip::Server::GetInstance().GetCommissioningWindowManager().GetCommissioningMode() ==
-                Dnssd::CommissioningMode::kEnabledBasic;
             ChipLogProgress(DeviceLayer, "Performing erasing of settings partition");
 
-#ifdef CONFIG_CHIP_FACTORY_RESET_ERASE_NVS
-            void * storage = nullptr;
-            int status     = settings_storage_get(&storage);
-
-            if (status == 0)
+            // Do FactoryReset in case of failed commissioning to allow new pairing via BLE
+            if (sIsCommissioningFailed)
             {
-                status = nvs_clear(static_cast<nvs_fs *>(storage));
+                chip::Server::GetInstance().ScheduleFactoryReset();
             }
-
-            if (!isBasicCommissioningMode)
+            // TC-OPCREDS-3.6 (device doesn't need to reboot automatically after the last fabric is removed) can't use FactoryReset
+            else
             {
+                void * storage = nullptr;
+                int status     = settings_storage_get(&storage);
+
                 if (!status)
                 {
-                    status = nvs_mount(static_cast<nvs_fs *>(storage));
+                    status = nvs_clear(static_cast<nvs_fs *>(storage));
                 }
-            }
-
-            if (status)
-            {
-                ChipLogError(DeviceLayer, "Storage clearance failed: %d", status);
-            }
-#else
-            const CHIP_ERROR err = PersistedStorage::KeyValueStoreMgrImpl().DoFactoryReset();
 
-            if (err != CHIP_NO_ERROR)
-            {
-                ChipLogError(DeviceLayer, "Factory reset failed: %" CHIP_ERROR_FORMAT, err.Format());
-            }
+                if (!status)
+                {
+                    status = nvs_mount(static_cast<nvs_fs *>(storage));
+                }
 
-            ConnectivityMgr().ErasePersistentInfo();
-#endif
-            if (isBasicCommissioningMode)
-            {
-                PlatformMgr().Shutdown();
+                if (status)
+                {
+                    ChipLogError(DeviceLayer, "Storage clearance failed: %d", status);
+                }
             }
         }
     }
@@ -202,6 +191,7 @@ class AppFabricTableDelegate : public FabricTable::Delegate
 
 class PlatformMgrDelegate : public DeviceLayer::PlatformManagerDelegate
 {
+    // Disable openthread before reset to prevent writing to NVS
     void OnShutDown() override
     {
         if (ThreadStackManagerImpl().IsThreadEnabled())