unfinished linux backend

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "vendor/wxWidgets"]
 	path = vendor/wxWidgets
 	url = https://github.com/wxWidgets/wxWidgets.git
+[submodule "vendor/libdbus"]
+	path = vendor/libdbus
+	url = https://gitlab.freedesktop.org/dbus/dbus.git

CMakeLists.txt

@@ -18,6 +18,7 @@ add_executable (PlayerLink ${SOURCES})
 set_property(TARGET PlayerLink PROPERTY CXX_STANDARD 20)
 add_subdirectory("vendor")
 set(LIBRARIES discord-rpc libcurl_static mbedcrypto mbedx509 mbedtls wxmono)
+set(INCLUDES vendor vendor/libdbus vendor/wxWidgets/include)
 
 #use windows subsystem to disable console window and link winrt
 if(WIN32)
@@ -32,6 +33,9 @@ elseif(APPLE)
     else()
         message(FATAL_ERROR "MediaRemote framework not found.")
     endif()
+elseif(UNIX AND NOT APPLE)
+    list(APPEND LIBRARIES dbus)
+    list(APPEND INCLUDES "${CMAKE_BINARY_DIR}/vendor/dbus")
 endif()
 
 #search directories for the autogenerated wxwidgets setup.h file for all plattforms
@@ -42,7 +46,7 @@ file(GLOB wx_setup_dir
 )
 if(wx_setup_dir)
     message(STATUS "wxWidgets setup.h directory found: ${wx_setup_dir}")
-    target_include_directories(PlayerLink PRIVATE vendor vendor/wxWidgets/include ${wx_setup_dir})
+    target_include_directories(PlayerLink PRIVATE ${INCLUDES} ${wx_setup_dir})
 else()
     message(FATAL_ERROR "wx/setup.h not found. Please check your wxWidgets build configuration.")
 endif()

src/backends/linux.cpp

@@ -1,5 +1,182 @@
 #if !defined(_WIN32) && !defined(__APPLE__)
+#include <dbus/dbus.h>
+
+#include <iostream>
+
 #include "../backend.hpp"
-std::shared_ptr<MediaInfo> backend::getMediaInformation() { return nullptr; }
+bool initialized = false;
+DBusConnection* conn = nullptr;
+
+std::string getActivePlayer(DBusConnection* conn) {
+    DBusMessage* msg;
+    DBusMessageIter args;
+    DBusError err;
+    dbus_error_init(&err);
+
+    msg = dbus_message_new_method_call("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus",
+                                       "ListNames");
+    DBusMessage* reply = dbus_connection_send_with_reply_and_block(conn, msg, -1, &err);
+    dbus_message_unref(msg);
+
+    if (!reply) {
+        dbus_error_free(&err);
+        return "";
+    }
+
+    dbus_message_iter_init(reply, &args);
+    DBusMessageIter sub;
+    dbus_message_iter_recurse(&args, &sub);
+
+    std::string active_player;
+    while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) {
+        const char* name;
+        dbus_message_iter_get_basic(&sub, &name);
+
+        if (std::string(name).find("org.mpris.MediaPlayer2.") == 0) {
+            active_player = name;
+            break;
+        }
+
+        dbus_message_iter_next(&sub);
+    }
+
+    dbus_message_unref(reply);
+    return active_player;
+}
+
+void getNowPlaying(DBusConnection* conn, const std::string& player) {
+    DBusMessage* msg;
+    DBusMessageIter args;
+    DBusError err;
+    dbus_error_init(&err);
+
+    msg = dbus_message_new_method_call(player.c_str(), "/org/mpris/MediaPlayer2", "org.freedesktop.DBus.Properties",
+                                       "Get");
+    const char* iface = "org.mpris.MediaPlayer2.Player";
+    const char* prop = "Metadata";
+    dbus_message_append_args(msg, DBUS_TYPE_STRING, &iface, DBUS_TYPE_STRING, &prop, DBUS_TYPE_INVALID);
+
+    DBusMessage* reply = dbus_connection_send_with_reply_and_block(conn, msg, -1, &err);
+    dbus_message_unref(msg);
+
+    if (!reply) {
+        std::cerr << "Failed to get metadata: " << (err.message ? err.message : "Unknown error") << std::endl;
+        dbus_error_free(&err);
+        return;
+    }
+
+    dbus_message_iter_init(reply, &args);
+    if (dbus_message_iter_get_arg_type(&args) == DBUS_TYPE_VARIANT) {
+        DBusMessageIter variant;
+        dbus_message_iter_recurse(&args, &variant);
+
+        if (dbus_message_iter_get_arg_type(&variant) == DBUS_TYPE_ARRAY) {
+            DBusMessageIter array_iter;
+            dbus_message_iter_recurse(&variant, &array_iter);
+
+            while (dbus_message_iter_get_arg_type(&array_iter) == DBUS_TYPE_DICT_ENTRY) {
+                DBusMessageIter dict_entry;
+                dbus_message_iter_recurse(&array_iter, &dict_entry);
+
+                const char* key;
+                dbus_message_iter_get_basic(&dict_entry, &key);
+                dbus_message_iter_next(&dict_entry);
+
+                if (std::string(key) == "xesam:title") {
+                    DBusMessageIter value_variant;
+                    dbus_message_iter_recurse(&dict_entry, &value_variant);
+
+                    if (dbus_message_iter_get_arg_type(&value_variant) == DBUS_TYPE_STRING) {
+                        const char* title;
+                        dbus_message_iter_get_basic(&value_variant, &title);
+                        std::cout << "Title: " << title << std::endl;
+                    }
+                } else if (std::string(key) == "xesam:artist") {
+                    DBusMessageIter value_variant;
+                    dbus_message_iter_recurse(&dict_entry, &value_variant);
+
+                    if (dbus_message_iter_get_arg_type(&value_variant) == DBUS_TYPE_ARRAY) {
+                        DBusMessageIter artist_array;
+                        dbus_message_iter_recurse(&value_variant, &artist_array);
+
+                        std::cout << "Artist(s): ";
+                        bool first = true;
+                        while (dbus_message_iter_get_arg_type(&artist_array) == DBUS_TYPE_STRING) {
+                            const char* artist;
+                            dbus_message_iter_get_basic(&artist_array, &artist);
+                            if (!first)
+                                std::cout << ", ";
+                            std::cout << artist;
+                            first = false;
+                            dbus_message_iter_next(&artist_array);
+                        }
+                        std::cout << std::endl;
+                    }
+                } else if (std::string(key) == "mpris:length") {
+                    DBusMessageIter value_variant;
+                    dbus_message_iter_recurse(&dict_entry, &value_variant);
+                    int arg_type = dbus_message_iter_get_arg_type(&value_variant);
+                    if (arg_type == DBUS_TYPE_INT64 || arg_type == DBUS_TYPE_UINT64) {
+                        int64_t length;
+                        dbus_message_iter_get_basic(&value_variant, &length);
+                        std::cout << "Length (Duration): " << length / 1000000.0 << " seconds" << std::endl;
+                    }
+                }
+
+                dbus_message_iter_next(&array_iter);
+            }
+        }
+    } else {
+        std::cerr << "Unexpected reply type for Metadata" << std::endl;
+    }
+
+    dbus_message_unref(reply);
+    msg = dbus_message_new_method_call(player.c_str(), "/org/mpris/MediaPlayer2", "org.freedesktop.DBus.Properties",
+                                       "Get");
+    prop = "Position";
+    dbus_message_append_args(msg, DBUS_TYPE_STRING, &iface, DBUS_TYPE_STRING, &prop, DBUS_TYPE_INVALID);
+
+    reply = dbus_connection_send_with_reply_and_block(conn, msg, -1, &err);
+    dbus_message_unref(msg);
+
+    if (!reply) {
+        std::cerr << "Failed to get position: " << (err.message ? err.message : "Unknown error") << std::endl;
+        dbus_error_free(&err);
+        return;
+    }
+
+    dbus_message_iter_init(reply, &args);
+    if (dbus_message_iter_get_arg_type(&args) == DBUS_TYPE_VARIANT) {
+        DBusMessageIter variant;
+        dbus_message_iter_recurse(&args, &variant);
+        int arg_type = dbus_message_iter_get_arg_type(&variant);
+        if (arg_type == DBUS_TYPE_INT64 || arg_type == DBUS_TYPE_UINT64) {
+            int64_t position;
+            dbus_message_iter_get_basic(&variant, &position);
+            std::cout << "Current Position: " << position / 1000000.0 << " seconds" << std::endl;
+        }
+    }
+    dbus_message_unref(reply);
+}
+
+std::shared_ptr<MediaInfo> backend::getMediaInformation() {
+    if (!initialized) {
+        DBusError err;
+        dbus_error_init(&err);
+
+        conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
+        if (!conn) {
+            dbus_error_free(&err);
+            return nullptr;
+        }
+        initialized = true;
+    }
+    std::string player = getActivePlayer(conn);
+    if (player == "")
+        return nullptr;
+    getNowPlaying(conn, player);
+    return nullptr;
+}
+
 bool backend::toggleAutostart(bool enabled) { return false; }
 #endif

vendor/CMakeLists.txt

@@ -18,4 +18,7 @@ set(wxBUILD_SHARED OFF)
 set(wxBUILD_MONOLITHIC ON)
 set(wxUSE_GUI ON)
 set(wxUSE_WEBVIEW OFF)
-add_subdirectory("wxWidgets")
+add_subdirectory("wxWidgets")
+if(UNIX AND NOT APPLE)
+    add_subdirectory("dbus")
+endif()

vendor/dbus/CMakeLists.txt

@@ -0,0 +1,127 @@
+project(dbus-lib)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/vendor/libdbus/cmake")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/vendor/libdbus/cmake/modules")
+SET(DBUS_DIR ${CMAKE_SOURCE_DIR}/vendor/libdbus/dbus)
+
+include(MacrosAutotools)
+autoinit(${CMAKE_SOURCE_DIR}/vendor/libdbus/configure.ac)
+autoversion(dbus)
+
+include (TestBigEndian)
+test_big_endian(WORDS_BIGENDIAN)
+
+set(DBUS_PATCH_VERSION "0")
+
+include(Macros)
+string(TIMESTAMP DBUS_BUILD_TIMESTAMP "%Y%m%d%H%M" UTC)
+set(BUILD_FILEVERSION ${DBUS_MAJOR_VERSION},${DBUS_MINOR_VERSION},${DBUS_MICRO_VERSION},${DBUS_PATCH_VERSION})
+set(BUILD_TIMESTAMP ${DBUS_BUILD_TIMESTAMP})
+if(UNIX AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    set(DBUS_LINUX 1)
+endif()
+set(_GNU_SOURCE 1)
+set(DBUS_LIBRARIES dbus-1)
+set(DBUS_INTERNAL_LIBRARIES dbus-internal)
+
+set(DBUS_INTERNAL_ADD_LIBRARY_OPTIONS STATIC)
+set(DBUS_INTERNAL_CLIENT_DEFINITIONS "-DDBUS_COMPILATION")
+add_definitions(-DHAVE_CONFIG_H)
+include(ConfigureChecks)
+
+set(DBUS_SESSION_SOCKET_DIR "" CACHE STRING "Default directory for session socket")
+
+set(DBUS_SYSTEM_PID_FILE ${DBUS_RUNSTATEDIR}/dbus/pid)
+
+set(DBUS_CONSOLE_AUTH_DIR "" CACHE STRING "Directory to check for pam_console/pam_foreground flag files, or empty to ignore")
+
+set(DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "unix:path=${DBUS_RUNSTATEDIR}/dbus/system_bus_socket" CACHE STRING "system bus default address")
+
+set(DBUS_SESSION_SOCKET_DIR "" CACHE STRING "Default directory for session socket")
+if(UNIX)
+    if (CMAKE_CROSSCOMPILING)
+        if (NOT DBUS_SESSION_SOCKET_DIR)
+            message(FATAL_ERROR "cannot autodetect session socket directory "
+                    "when crosscompiling, pass -DDBUS_SESSION_SOCKET_DIR=...")
+        endif()
+    elseif(NOT $ENV{TMPDIR} STREQUAL "")
+        set(DBUS_SESSION_SOCKET_DIR $ENV{TMPDIR})
+    elseif(NOT $ENV{TEMP} STREQUAL "")
+        set(DBUS_SESSION_SOCKET_DIR $ENV{TEMP})
+    elseif(NOT $ENV{TMP} STREQUAL "")
+        set(DBUS_SESSION_SOCKET_DIR $ENV{TMP})
+    else()
+        set(DBUS_SESSION_SOCKET_DIR /tmp)
+    endif()
+endif()
+
+set(DBUS_SESSION_BUS_LISTEN_ADDRESS "unix:tmpdir=${DBUS_SESSION_SOCKET_DIR}" CACHE STRING "session bus default listening address")
+set(DBUS_SESSION_BUS_CONNECT_ADDRESS "autolaunch:" CACHE STRING "session bus fallback address for clients")
+set(DBUS_SYSTEM_CONFIG_FILE  ${DBUS_DATADIR}/dbus-1/system.conf)
+set(DBUS_SESSION_CONFIG_FILE ${DBUS_DATADIR}/dbus-1/session.conf)
+set(DBUS_MACHINE_UUID_FILE   ${CMAKE_INSTALL_FULL_LOCALSTATEDIR}/lib/dbus/machine-id)
+set(DBUS_USER "messagebus")
+set(DBUS_TEST_USER "nobody")
+set(DBUS_SESSION_CONF_MAYBE_AUTH_EXTERNAL "<auth>EXTERNAL</auth>")
+
+
+set(DBUS_DAEMON_NAME "dbus-daemon" CACHE STRING "The name of the dbus daemon executable")
+configure_file(${CMAKE_SOURCE_DIR}/vendor/libdbus/cmake/config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h )
+configure_file(${DBUS_DIR}/dbus-arch-deps.h.in ${CMAKE_CURRENT_BINARY_DIR}/dbus/dbus-arch-deps.h )
+
+add_definitions(-DDBUS_COMPILATION)
+
+set (DBUS_LIB_SOURCES
+	${DBUS_DIR}/dbus-address.c
+	${DBUS_DIR}/dbus-auth.c
+	${DBUS_DIR}/dbus-bus.c
+	${DBUS_DIR}/dbus-test-tap.c
+	${DBUS_DIR}/dbus-connection.c
+	${DBUS_DIR}/dbus-credentials.c
+	${DBUS_DIR}/dbus-errors.c
+	${DBUS_DIR}/dbus-keyring.c
+	${DBUS_DIR}/dbus-marshal-header.c
+	${DBUS_DIR}/dbus-marshal-byteswap.c
+	${DBUS_DIR}/dbus-marshal-recursive.c
+	${DBUS_DIR}/dbus-marshal-validate.c
+	${DBUS_DIR}/dbus-message.c
+	${DBUS_DIR}/dbus-misc.c
+	${DBUS_DIR}/dbus-nonce.c
+	${DBUS_DIR}/dbus-object-tree.c
+	${DBUS_DIR}/dbus-pending-call.c
+	${DBUS_DIR}/dbus-resources.c
+	${DBUS_DIR}/dbus-server.c
+	${DBUS_DIR}/dbus-server-socket.c
+	${DBUS_DIR}/dbus-server-debug-pipe.c
+	${DBUS_DIR}/dbus-sha.c
+	${DBUS_DIR}/dbus-signature.c
+	${DBUS_DIR}/dbus-syntax.c
+	${DBUS_DIR}/dbus-timeout.c
+	${DBUS_DIR}/dbus-threads.c
+	${DBUS_DIR}/dbus-transport.c
+	${DBUS_DIR}/dbus-transport-socket.c
+	${DBUS_DIR}/dbus-watch.c
+	${DBUS_DIR}/dbus-transport-unix.c
+	${DBUS_DIR}/dbus-server-unix.c
+	${DBUS_DIR}/dbus-dataslot.c
+	${DBUS_DIR}/dbus-file.c
+	${DBUS_DIR}/dbus-hash.c
+	${DBUS_DIR}/dbus-internals.c
+	${DBUS_DIR}/dbus-list.c
+	${DBUS_DIR}/dbus-marshal-basic.c
+	${DBUS_DIR}/dbus-memory.c
+	${DBUS_DIR}/dbus-mempool.c
+	${DBUS_DIR}/dbus-string.c
+	${DBUS_DIR}/dbus-sysdeps.c
+	${DBUS_DIR}/dbus-pipe.c
+	${DBUS_DIR}/dbus-file-unix.c
+	${DBUS_DIR}/dbus-pipe-unix.c
+	${DBUS_DIR}/dbus-sysdeps-unix.c
+	${DBUS_DIR}/dbus-sysdeps-pthread.c
+	${DBUS_DIR}/dbus-userdb.c
+)
+file(GLOB libdbus_config_dir
+    "${CMAKE_BINARY_DIR}/vendor/dbus"
+)
+
+add_library(dbus STATIC ${DBUS_LIB_SOURCES})
+target_include_directories(dbus PRIVATE ${libdbus_config_dir} ${CMAKE_SOURCE_DIR}/vendor/libdbus)

vendor/libdbus

@@ -0,0 +1 @@
+Subproject commit fbd7a993fb966330e41c59634dafb212399d7a21