Bluetooth (Windows): detect battery (WIP)

src/detection/bluetooth/bluetooth_windows.cpp

@@ -0,0 +1,31 @@
+extern "C"
+{
+#include "bluetooth.h"
+}
+#include "util/windows/wmi.hpp"
+#include "util/windows/unicode.hpp"
+
+#include <propvarutil.h>
+
+STDAPI InitVariantFromStringArray(_In_reads_(cElems) PCWSTR *prgsz, _In_ ULONG cElems, _Out_ VARIANT *pvar);
+
+static const char* detectWithWmi(FFlist* result)
+{
+    FFWmiQuery query(L"SELECT __PATH FROM Win32_PnPEntity WHERE Service = 'BthHFEnum'", nullptr, FFWmiNamespace::CIMV2);
+    if(!query)
+        return "Query WMI service failed";
+
+    while(FFWmiRecord record = query.next())
+    {
+        IWbemClassObject* pInParams = nullptr;
+        PCWSTR props[] = { L"{104EA319-6EE2-4701-BD47-8DDBF425BBE5} 2" };
+        VARIANT devicePropertyKeys;
+        InitVariantFromStringArray(props, ARRAY_SIZE(props), &devicePropertyKeys);
+        record.obj->GetMethod(bstr_t(L"GetDeviceProperties"), 0, &pInParams, NULL);
+        pInParams->Put(L"devicePropertyKeys", 0, &devicePropertyKeys, CIM_FLAG_ARRAY | CIM_STRING);
+        IWbemCallResult* pResult = nullptr;
+        query.pService->ExecMethod(bstr_t(record.get(L"__PATH").bstrVal), bstr_t(L"GetDeviceProperties"), 0, nullptr, pInParams, nullptr, &pResult);
+        // TODO: parse result
+    }
+    return NULL;
+}