cli-parser (#4)

Goal of this PR should be to integrate a working CLI parser so that commands can be sent to the Printer class to print text, such as
ptprnt -t=FooBar
also, standard flags for setting the output verbosity and help should be implemented

Reviewed-on: #4

src/PtouchPrint.cpp

@@ -19,30 +19,54 @@
 
 #include "PtouchPrint.hpp"
 
+#include <CLI/App.hpp>
+#include <spdlog/common.h>
 #include <spdlog/spdlog.h>
 
+#include <functional>
+
+#include "CLI/Option.hpp"
 #include "P700Printer.hpp"
 #include "graphics/Bitmap.hpp"
 #include "libusbwrap/UsbDeviceFactory.hpp"
 
-PtouchPrint::PtouchPrint() {}
+namespace ptprnt {
 
-PtouchPrint::~PtouchPrint() {}
+PtouchPrint::PtouchPrint(const char* versionString) : mVersionString{versionString} {}
 
-void PtouchPrint::init() {
-    mUsbDeviceFactory.init();
+int PtouchPrint::init(int argc, char** argv) {
+    setupCliParser();
+
+    try {
+        mApp.parse(argc, argv);
+    } catch (const CLI::ParseError& e) {
+        mApp.exit(e);
+        return -1;
+    }
+
+    if (mVerboseFlag) {
+        setupLogger(spdlog::level::trace);
+    } else {
+        setupLogger(spdlog::level::critical);
+    }
+
+    if (!mUsbDeviceFactory.init()) {
+        spdlog::error("Could not initialize libusb");
+        return -1;
+    }
     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];
@@ -50,14 +74,20 @@ 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();
     spdlog::info("Detected tape width is {}mm", status.tapeWidthMm);
     auto bm = ptprnt::graphics::Bitmap<ptprnt::graphics::ALPHA8>(512, 128);
-    printer->printBitmap(bm);
+    //printer->printBitmap(bm);
     //printer->printText("wurst", 1);
+
+    for (auto& cmd : mCommands) {
+        std::cout << cmd.second << std::endl;
+    }
+
+    return 0;
 }
 
 unsigned int PtouchPrint::getCompatiblePrinters() {
@@ -81,3 +111,52 @@ 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() {
+    auto printVersion = [this](std::size_t) {
+        std::cout << "ptprnt version: " << mVersionString << std::endl;
+    };
+
+    // General options
+    mApp.add_flag("-v,--verbose", mVerboseFlag, "Enable verbose output");
+    mApp.add_flag("-V,--version", printVersion, "Prints the ptprnt's version");
+
+    // Text printing options
+    mApp.add_option("-t,--text",
+                    "Text to print (can be used multple times, use formatting options before to "
+                    "influence text layout)")
+        ->group("Printing")
+        ->multi_option_policy(CLI::MultiOptionPolicy::TakeAll)
+        ->trigger_on_parse()
+        ->each([this](std::string text) { mCommands.emplace_back(CliCmdType::Text, text); });
+    mApp.add_option("-f,--font", "Font used for the following text occurences")
+        ->group("Text printing ")
+        ->multi_option_policy(CLI::MultiOptionPolicy::TakeAll)
+        ->trigger_on_parse()
+        ->each([this](std::string font) { mCommands.emplace_back(CliCmdType::Font, font); });
+    mApp.add_option("-s,--fontsize", "Font size of the following text occurences")
+        ->group("Text printing ")
+        ->multi_option_policy(CLI::MultiOptionPolicy::TakeAll)
+        ->trigger_on_parse()
+        ->each([this](std::string size) { mCommands.emplace_back(CliCmdType::FontSize, size); });
+    mApp.add_option("--valign", "Vertical alignment of the following text occurences")
+        ->group("Text printing ")
+        ->multi_option_policy(CLI::MultiOptionPolicy::TakeAll)
+        ->trigger_on_parse()
+        ->each([this](std::string valign) { mCommands.emplace_back(CliCmdType::VAlign, valign); });
+    mApp.add_option("--halign", "Vertical alignment of the following text occurences")
+        ->group("Text printing ")
+        ->multi_option_policy(CLI::MultiOptionPolicy::TakeAll)
+        ->trigger_on_parse()
+        ->each([this](std::string halign) { mCommands.emplace_back(CliCmdType::HAlign, halign); });
+
+    // Image options
+    mApp.add_option("-i,--image", "Image to print. Excludes all text printing ")
+        ->group("Image printing");
+}
+}  // namespace ptprnt