core: Keep track of telemetry for the current emulation session.

src/core/telemetry_session.h

@@ -0,0 +1,38 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "common/telemetry.h"
+
+namespace Core {
+
+/**
+ * Instruments telemetry for this emulation session. Creates a new set of telemetry fields on each
+ * session, logging any one-time fields. Interfaces with the telemetry backend used for submitting
+ * data to the web service. Submits session data on close.
+ */
+class TelemetrySession : NonCopyable {
+public:
+    TelemetrySession();
+    ~TelemetrySession();
+
+    /**
+     * Wrapper around the Telemetry::FieldCollection::AddField method.
+     * @param type Type of the field to add.
+     * @param name Name of the field to add.
+     * @param value Value for the field to add.
+     */
+    template <typename T>
+    void AddField(Telemetry::FieldType type, const char* name, T value) {
+        field_collection.AddField(type, name, std::move(value));
+    }
+
+private:
+    Telemetry::FieldCollection field_collection; ///< Field collection, tracks all added fields
+    std::unique_ptr<Telemetry::VisitorInterface> backend; ///< Backend interface that logs fields
+};
+
+} // namespace Core