2 files changed, 171 insertions, 0 deletions
diff --git a/source/app/wandad/CMakeLists.txt b/source/app/wandad/CMakeLists.txt
new file mode 100644
index 0000000..dfcaeb3
--- /dev/null
+++ b/source/app/wandad/CMakeLists.txt
@@ -0,0 +1,24 @@
+find_package("lyra")
+find_package("spdlog")
+
+add_executable("wandad"
+  "src/main.cpp"
+)
+
+target_link_libraries("wandad" PRIVATE
+  "wanda::control"
+  "wanda::proto"
+  "wanda::std_ext"
+  "wanda::system"
+
+  "bfg::lyra"
+  "spdlog::spdlog_header_only"
+)
+
+set_target_properties("wandad" PROPERTIES
+  CXX_STANDARD_REQUIRED YES
+  CXX_EXTENSIONS OFF
+  INTERPROCEDURAL_OPTIMIZATION ${WANDA_IPO_SUPPORTED}
+)
+
+install(TARGETS "wandad")
diff --git a/source/app/wandad/src/main.cpp b/source/app/wandad/src/main.cpp
new file mode 100644
index 0000000..8d16a7e
--- /dev/null
+++ b/source/app/wandad/src/main.cpp
@@ -0,0 +1,147 @@
+#include <wanda/control/interface.hpp>
+#include <wanda/proto/command.hpp>
+#include <wanda/std_ext/optional.hpp>
+#include <wanda/system/environment.hpp>
+#include <wanda/system/filesystem.hpp>
+#include <wanda/system/logging.hpp>
+#include <wanda/system/setting.hpp>
+#include <wanda/system/wallpaper.hpp>
+#include <wanda/system/xdg.hpp>
+
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/signal_set.hpp>
+#include <lyra/lyra.hpp>
+#include <spdlog/sinks/stdout_color_sinks.h>
+
+#include <csignal>
+#include <cstdlib>
+#include <iostream>
+#include <set>
+#include <string>
+
+namespace
+{
+  constexpr auto image_filter = [](auto const & path) {
+    static auto const extensions = std::set<std::filesystem::path>{
+        std::filesystem::path{".jpg"},
+        std::filesystem::path{".png"},
+    };
+
+    if (!std::filesystem::is_regular_file(path))
+    {
+      return false;
+    }
+
+    return extensions.find(path.extension()) != extensions.cend();
+  };
+
+  struct cli
+  {
+    std::string wallpaper_directory{};
+    bool help{};
+
+    lyra::cli_parser parser{};
+
+    auto parse(int argc, char const * const * argv, std::ostream & error)
+    {
+      parser |=  //
+          lyra::help(help) |  //
+          lyra::arg{wallpaper_directory, "directory"}("The wallpaper source directory").required();
+
+      auto result = parser.parse({argc, argv});
+
+      if (!result)
+      {
+        error << "Error while processing command line arguments: " << result.message() << '\n' << parser << '\n';
+        return false;
+      }
+
+      return true;
+    }
+  };
+
+  struct listener : wanda::control::interface::listener
+  {
+    listener(std::vector<std::filesystem::path> const & wallpapers)
+        : m_wallpapers{wallpapers}
+    {
+    }
+
+    void on_received(wanda::control::interface & interface, wanda::proto::command command) override
+    {
+      switch (command.id)
+      {
+        case wanda::proto::command_id::change: {
+          auto wallpaper = wanda::system::random_pick(m_wallpapers);
+          wanda::system::get_logger()->info("changing wallpaper to '{}'", wallpaper.native());
+          wanda::system::set_wallpaper(wallpaper);
+          break;
+        }
+        default:
+          wanda::system::get_logger()->error("received unknown command '{}'", static_cast<int>(command.id));
+      }
+    }
+
+  private:
+    std::vector<std::filesystem::path> const & m_wallpapers;
+  };
+
+}  // namespace
+
+int main(int argc, char const * const * argv)
+{
+  using namespace wanda::std_ext;
+
+  auto cli = ::cli{};
+  if (!cli.parse(argc, argv, std::cerr))
+  {
+    return EXIT_FAILURE;
+  }
+  else if (cli.help)
+  {
+    std::cout << cli.parser << '\n';
+    return EXIT_SUCCESS;
+  }
+
+  wanda::system::initialize_logger(std::make_shared<spdlog::sinks::stdout_color_sink_st>());
+  wanda::system::get_logger()->info("wanda is starting up");
+
+  with(wanda::system::scan({cli.wallpaper_directory}, image_filter),
+       [&](auto const & list) {
+         auto service = boost::asio::io_context{};
+         auto socket_path =
+             wanda::system::xdg_path_for(wanda::system::xdg_directory::runtime_dir, wanda::system::environment{}) /
+             ".wanda_interface";
+
+         wanda::system::get_logger()->info("starting control interface on '{}'", socket_path.native());
+         auto listener = ::listener{list};
+         auto interface = wanda::control::make_interface(service, socket_path, listener);
+
+         if (!interface)
+         {
+           wanda::system::get_logger()->error("failed to start control interface");
+           return;
+         }
+
+         if (interface->start())
+         {
+           return;
+         }
+
+         auto signals = boost::asio::signal_set{service, SIGINT, SIGTERM};
+         signals.async_wait([&](auto const & error, auto const signal) {
+           if (!error)
+           {
+             wanda::system::get_logger()->info("Received signal {}. terminating...", signal);
+             interface->shutdown();
+             service.stop();
+           }
+         });
+
+         auto wallpaper = wanda::system::random_pick(list);
+         wanda::system::set_wallpaper(wallpaper);
+
+         service.run();
+       }) ||
+      [&] { wanda::system::get_logger()->error("wallpaper directory does not exist"); };
+}