refactor(workspaces): listen ipc event

include/modules/workspaces.hpp

@@ -4,6 +4,7 @@
 #include "bar.hpp"
 #include "client.hpp"
 #include "util/chrono.hpp"
+#include "util/json.hpp"
 #include "IModule.hpp"
 
 namespace waybar::modules {
@@ -15,13 +16,16 @@ namespace waybar::modules {
       operator Gtk::Widget &();
     private:
       void _addWorkspace(Json::Value node);
-      Json::Value _getWorkspaces();
+      Json::Value _getWorkspaces(const std::string data);
       Bar &_bar;
       waybar::util::SleeperThread _thread;
       Gtk::Box _box;
+      util::JsonParser _parser;
+      std::mutex _mutex;
       std::unordered_map<int, Gtk::Button> _buttons;
-      int _ipcSocketfd;
-      int _ipcEventSocketfd;
+      Json::Value _workspaces;
+      int _ipcfd;
+      int _ipcEventfd;
   };
 
 }

include/util/json.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <json/json.h>
+
+namespace waybar::util {
+
+  struct JsonParser {
+
+    JsonParser()
+      : _reader(_builder.newCharReader())
+    {}
+
+    Json::Value parse(const std::string data)
+    {
+      Json::Value root;
+      std::string err;
+      bool res =
+        _reader->parse(data.c_str(), data.c_str() + data.size(), &root, &err);
+      if (!res)
+        throw std::runtime_error(err);
+      return root;
+    }
+
+    ~JsonParser()
+    {
+      delete _reader;
+    }
+
+  private:
+    Json::CharReaderBuilder _builder;
+    Json::CharReader *_reader;
+  };
+
+}