Some refactorings to incoporate CLI parsing

src/PtouchPrint.cpp

@@ -19,30 +19,45 @@
 
 #include "PtouchPrint.hpp"
 
+#include <CLI/App.hpp>
+#include <spdlog/common.h>
 #include <spdlog/spdlog.h>
 
 #include "P700Printer.hpp"
 #include "graphics/Bitmap.hpp"
 #include "libusbwrap/UsbDeviceFactory.hpp"
 
-PtouchPrint::PtouchPrint() {}
+PtouchPrint::PtouchPrint(const char* versionString) : mVersionString{versionString} {}
 
-PtouchPrint::~PtouchPrint() {}
+int PtouchPrint::init(int argc, char** argv) {
+    setupCliParser();
+    if (mVerboseFlag) {
+        setupLogger(spdlog::level::debug);
+    } else {
+        setupLogger(spdlog::level::critical);
+    }
+
+    try {
+        mApp.parse(argc, argv);
+    } catch (const CLI::ParseError& e) {
+        return mApp.exit(e);
+    }
 
-void PtouchPrint::init() {
     mUsbDeviceFactory.init();
     mCompatiblePrinters = {std::make_shared<ptprnt::printer::P700Printer>()};
+    return 0;
 }
 
-void PtouchPrint::run() {
+int PtouchPrint::run() {
+
     auto numFoundPrinters = getCompatiblePrinters();
     if (numFoundPrinters == 0) {
         spdlog::error(
             "No compatible printers found, please make sure if they are turned on and connected");
-        return;
+        return -1;
     } else if (numFoundPrinters > 1) {
         spdlog::warn("Found more than one compatible printer. Currently not supported.");
-        return;
+        return -1;
     }
 
     auto printer = mCompatiblePrinters[0];
@@ -50,7 +65,7 @@ void PtouchPrint::run() {
     if (devices.size() != 1) {
         spdlog::warn(
             "Found more than one device of the same printer on bus. Currently not supported");
-        return;
+        return -1;
     }
     printer->attachUsbDevice(devices[0]);
     auto status = printer->getPrinterStatus();
@@ -58,6 +73,8 @@ void PtouchPrint::run() {
     auto bm = ptprnt::graphics::Bitmap<ptprnt::graphics::ALPHA8>(512, 128);
     printer->printBitmap(bm);
     //printer->printText("wurst", 1);
+
+    return 0;
 }
 
 unsigned int PtouchPrint::getCompatiblePrinters() {
@@ -81,3 +98,12 @@ unsigned int PtouchPrint::getCompatiblePrinters() {
     mCompatiblePrinters.clear();
     return mDetectedPrinters.size();
 }
+
+void PtouchPrint::setupLogger(spdlog::level::level_enum lvl) {
+    spdlog::set_level(lvl);
+    spdlog::debug("Starting ptprnt {}", mVersionString);
+}
+
+void PtouchPrint::setupCliParser() {
+    mApp.add_option("-v,--verbose", mVerboseFlag, "Enable verbose output");
+}