[rp2_ble_tracker] Extract stamp-and-start helper; pin capability/switch independence (#18072)

esphome/components/rp2_ble_tracker/rp2_ble_tracker.cpp

@@ -163,11 +163,7 @@ bool RP2BLETracker::request_scan_mode(bool active) {
   // An idle scanner picks the mode up on its next start.
   if (this->scan_running_) {
     this->parent_->scan_stop();
-    // Stamp the attempt so the SCAN_START_RETRY_MS floor covers this start
-    // like every other one.
-    this->last_scan_start_attempt_ = App.get_loop_component_start_time();
-    if (!this->parent_->scan_start(static_cast<uint16_t>(this->scan_interval_),
-                                   static_cast<uint16_t>(this->scan_window_), this->scan_active_)) {
+    if (!this->controller_scan_start_()) {
       // The controller really stopped: behave exactly like loop()'s
       // reconciliation branch - notify listeners and let its retry recover.
       this->scan_running_ = false;
@@ -186,16 +182,19 @@ void RP2BLETracker::stop_scan() {
   this->disable_loop();
 }
 
+// Stamp-and-start for every controller scan attempt: the stamp keeps the
+// SCAN_START_RETRY_MS floor covering all callers, not only loop()'s retry.
+bool RP2BLETracker::controller_scan_start_() {
+  this->last_scan_start_attempt_ = App.get_loop_component_start_time();
+  return this->parent_->scan_start(static_cast<uint16_t>(this->scan_interval_),
+                                   static_cast<uint16_t>(this->scan_window_), this->scan_active_);
+}
+
 void RP2BLETracker::start_scan_() {
   if (this->scan_running_)
     return;
 
-  // Stamp every attempt regardless of caller so the loop's rate limit also
-  // covers a failed start that came through the public start_scan().
-  this->last_scan_start_attempt_ = App.get_loop_component_start_time();
-
-  if (!this->parent_->scan_start(static_cast<uint16_t>(this->scan_interval_), static_cast<uint16_t>(this->scan_window_),
-                                 this->scan_active_))
+  if (!this->controller_scan_start_())
     return;
 
   this->scan_running_ = true;

esphome/components/rp2_ble_tracker/rp2_ble_tracker.h

@@ -80,6 +80,7 @@ class RP2BLETracker : public Component,
 
  protected:
   void start_scan_();
+  bool controller_scan_start_();
   void stop_scan_();
   void fire_scan_end_();
 

tests/components/ble_device_base/test_scan_mode_request.cpp

@@ -36,6 +36,13 @@ class SwitchingHub : public DefaultHub {
   }
 };
 
+// The esp32 shape: the controller supports active scanning but the hub keeps
+// the refusing default (mode is driven through its own tracker API).
+class CapableRefusingHub : public DefaultHub {
+ public:
+  HubCapabilities get_capabilities() const override { return {true, false, false}; }
+};
+
 }  // namespace
 
 TEST(BLEHubScanModeRequest, DefaultRefusesAndChangesNothing) {
@@ -56,4 +63,11 @@ TEST(BLEHubScanModeRequest, OverrideHonorsAndApplies) {
   EXPECT_FALSE(hub.scan_active());
 }
 
+TEST(BLEHubScanModeRequest, CapabilityAndSwitchAreIndependent) {
+  CapableRefusingHub hub;
+  EXPECT_TRUE(hub.get_capabilities().active_scan);
+  EXPECT_FALSE(hub.request_scan_mode(false));
+  EXPECT_TRUE(hub.scan_active());
+}
+
 }  // namespace esphome::ble_device_base::testing