Save recording status to file to reload it when gsr overlay restarts

include/Overlay.hpp

@@ -15,6 +15,13 @@
 namespace gsr {
     class DropdownButton;
 
+    enum class RecordingStatus {
+        NONE,
+        REPLAY,
+        RECORD,
+        STREAM
+    };
+
     class Overlay {
     public:
         Overlay(mgl::Window &window, std::string resources_path, GsrInfo gsr_info, egl_functions egl_funcs, mgl::Color bg_color);
@@ -30,6 +37,17 @@ namespace gsr {
         void toggle_show();
         bool is_open() const;
     private:
+        void update_gsr_process_status();
+
+        void load_program_status();
+        void save_program_status();
+        void load_program_pid();
+        void save_program_pid();
+        void recording_stopped_remove_runtime_files();
+
+        void update_ui_recording_started();
+        void update_ui_recording_stopped();
+
         void on_press_start_replay(const std::string &id);
         void on_press_start_record(const std::string &id);
         void on_press_start_stream(const std::string &id);
@@ -60,5 +78,7 @@ namespace gsr {
         DropdownButton *replay_dropdown_button_ptr = nullptr;
         DropdownButton *record_dropdown_button_ptr = nullptr;
         DropdownButton *stream_dropdown_button_ptr = nullptr;
+
+        RecordingStatus recording_status = RecordingStatus::NONE;
     };
 }

include/Process.hpp

@@ -14,5 +14,6 @@ namespace gsr {
     bool exec_program_daemonized(const char **args);
     // Arguments ending with NULL
     pid_t exec_program(const char **args);
-    bool is_gpu_screen_recorder_running(pid_t &gsr_pid, GsrMode &mode);
+    // |output_buffer| should be at least PATH_MAX in size
+    bool read_cmdline_arg0(const char *filepath, char *output_buffer);
 }

include/Utils.hpp

@@ -4,6 +4,7 @@
 #include <string_view>
 #include <map>
 #include <string>
+#include <optional>
 
 namespace gsr {
     struct KeyValue {
@@ -23,10 +24,14 @@ namespace gsr {
     std::map<std::string, std::string> get_xdg_variables();
 
     std::string get_videos_dir();
+    // Returns 0 on success
     int create_directory_recursive(char *path);
     bool file_get_content(const char *filepath, std::string &file_content);
+    bool file_overwrite(const char *filepath, const std::string &data);
 
     // Returns the path to the parent directory (ignoring trailing /)
     // of "." if there is no parent directory and the directory path is relative
     std::string get_parent_directory(std::string_view directory);
+
+    std::optional<std::string> get_gsr_runtime_dir();
 }