[Fabric-Bridge] Instrument log to debug issues during state transitio…

…ns (#35301)

* Instrument log to debug state transitions

* Restyled by whitespace

* Restyled by clang-format

---------

Co-authored-by: Restyled.io <commits@restyled.io>

examples/fabric-bridge-app/linux/CommissionerControl.cpp

@@ -48,6 +48,8 @@ namespace CommissionerControl {
 
 void CommissionerControlDelegate::ResetDelegateState()
 {
+    ChipLogProgress(NotSpecified, "CommissionerControlDelegate: Resetting delegate state");
+
     // Reset the step to the initial state
     mNextStep = Step::kIdle;
 
@@ -71,6 +73,9 @@ void CommissionerControlDelegate::ResetDelegateState()
 
 CHIP_ERROR CommissionerControlDelegate::HandleCommissioningApprovalRequest(const CommissioningApprovalRequest & request)
 {
+    ChipLogProgress(NotSpecified, "CommissionerControlDelegate: Entering HandleCommissioningApprovalRequest, current state: %s",
+                    GetStateString(mNextStep));
+
     VerifyOrReturnError(mNextStep == Step::kIdle, CHIP_ERROR_INCORRECT_STATE);
 
     CommissionerControl::Events::CommissioningRequestResult::Type result;
@@ -116,6 +121,7 @@ CHIP_ERROR CommissionerControlDelegate::HandleCommissioningApprovalRequest(const
     if (err == CHIP_NO_ERROR)
     {
         mNextStep = Step::kWaitCommissionNodeRequest;
+        ChipLogProgress(NotSpecified, "CommissionerControlDelegate: State transitioned to %s", GetStateString(mNextStep));
     }
     else
     {
@@ -127,6 +133,9 @@ CHIP_ERROR CommissionerControlDelegate::HandleCommissioningApprovalRequest(const
 
 CHIP_ERROR CommissionerControlDelegate::ValidateCommissionNodeCommand(NodeId clientNodeId, uint64_t requestId)
 {
+    ChipLogProgress(NotSpecified, "CommissionerControlDelegate: Entering ValidateCommissionNodeCommand, current state: %s",
+                    GetStateString(mNextStep));
+
     CHIP_ERROR err = CHIP_NO_ERROR;
 
     VerifyOrReturnError(mNextStep == Step::kWaitCommissionNodeRequest, CHIP_ERROR_INCORRECT_STATE);
@@ -138,6 +147,7 @@ CHIP_ERROR CommissionerControlDelegate::ValidateCommissionNodeCommand(NodeId cli
     VerifyOrExit(mRequestId == requestId, err = CHIP_ERROR_INCORRECT_STATE);
 
     mNextStep = Step::kStartCommissionNode;
+    ChipLogProgress(NotSpecified, "CommissionerControlDelegate: State transitioned to %s", GetStateString(mNextStep));
 
 exit:
     return err;
@@ -170,7 +180,8 @@ CHIP_ERROR CommissionerControlDelegate::HandleCommissionNode(const Commissioning
 {
     CHIP_ERROR err = CHIP_NO_ERROR;
 
-    ChipLogProgress(NotSpecified, "CommissionerControlDelegate::HandleCommissionNode");
+    ChipLogProgress(NotSpecified, "CommissionerControlDelegate: Entering HandleCommissionNode, current state: %s",
+                    GetStateString(mNextStep));
 
     VerifyOrReturnError(mNextStep == Step::kStartCommissionNode, CHIP_ERROR_INCORRECT_STATE);
 

examples/fabric-bridge-app/linux/include/CommissionerControl.h

@@ -47,6 +47,21 @@ class CommissionerControlDelegate : public Delegate
         kStartCommissionNode,
     };
 
+    static const char * GetStateString(Step step)
+    {
+        switch (step)
+        {
+        case Step::kIdle:
+            return "kIdle";
+        case Step::kWaitCommissionNodeRequest:
+            return "kWaitCommissionNodeRequest";
+        case Step::kStartCommissionNode:
+            return "kStartCommissionNode";
+        default:
+            return "Unknown";
+        }
+    }
+
     void ResetDelegateState();
 
     static constexpr size_t kLabelBufferSize = 64;