Refactored the serialization

srcs/Internals/JsonWriter.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "../Arduino/Print.h"
+
+class JsonWriter
+{
+public:
+    explicit JsonWriter(Print& sink)
+        : _sink(sink), _length(0), _isCommaNeeded(false)
+    {
+    }
+
+    size_t bytesWritten()
+    {
+        return _length;
+    }
+
+    void beginArray();
+    void endArray();
+
+    void beginObject();
+    void endObject();
+
+    void writeKey(const char* key);
+
+    void writeValue(const char* value);
+    void writeValue(long value);
+    void writeValue(bool value);
+    void writeValue(double value, int decimals);
+
+private:
+    Print& _sink;
+    size_t _length;
+    bool _isCommaNeeded;
+
+    void writeCommaIfNeeded()
+    {
+        if (_isCommaNeeded)
+            _length += _sink.write(',');
+    }
+};
+