Add a printer factory to simplify construction of printer drivers (#11)

Co-authored-by: Moritz Martinius <mm@cloudprinters.de>
Reviewed-on: #11

src/PrinterDriverFactory.cpp

@@ -0,0 +1,23 @@
+#include "PrinterDriverFactory.hpp"
+
+#include <spdlog/spdlog.h>
+
+#include <memory>
+
+#include "P700Printer.hpp"
+#include "libusbwrap/LibUsbTypes.hpp"
+
+namespace ptprnt {
+
+std::shared_ptr<IPrinterDriver> PrinterDriverFactory::create(libusbwrap::usbId id) {
+
+    if (printer::P700Printer::mInfo.usbId == id) {
+        spdlog::info("Found printer P700!");
+        return std::make_shared<printer::P700Printer>();
+    } else {
+        spdlog::trace("{:04x}:{:04x} is not a compatible printer", id.first, id.second);
+    }
+    return nullptr;
+}
+
+}  // namespace ptprnt