Add logging for string metrics in MachineViewer and update settings

Author: pbosetti

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+  "chat.tools.terminal.autoApprove": {
+    "cmake": true
+  }
+}

src/machine_viewer.cpp

@@ -101,6 +101,16 @@ struct MachineViewer::Impl {
     _rec.log(_root_path + "/metrics/" + sanitize_metric_name(name), rerun::Scalars(value));
   }
 
+  void log_string(const std::string& name, const std::string& value) {
+    if (name.empty()) {
+      throw std::invalid_argument("MachineViewer string metric name cannot be empty.");
+    }
+
+    ++_tick;
+    _rec.set_time_sequence("tick", _tick);
+    _rec.log(_root_path + "/metrics/" + sanitize_metric_name(name), rerun::TextLog(value));
+  }
+
   void load_tool(double length, double diameter) {
     if (length == 0 || diameter == 0) {
       unload_tool();
@@ -341,6 +351,10 @@ void MachineViewer::log_scalar(const std::string& name, double value) {
   _impl->log_scalar(name, value);
 }
 
+void MachineViewer::log_string(const std::string& name, const std::string& value) {
+  _impl->log_string(name, value);
+}
+
 double MachineViewer::tool_z_offset() const {
   return _impl->tool_z_offset();
 }

src/machine_viewer.hpp

@@ -29,6 +29,7 @@ class MachineViewer {
   void load_tool(double length, double diameter);
   void unload_tool();
   void log_scalar(const std::string& name, double value);
+  void log_string(const std::string& name, const std::string& value);
   double tool_z_offset() const;
   void set_tool_z_offset(double tool_z_offset);
 

src/machinetool.cpp

@@ -121,11 +121,14 @@ class MachinetoolPlugin : public Sink<json> {
         }
 
         for (const auto& [name, value] : input.at("metrics").items()) {
-          if (!value.is_number()) {
-            _error = "Metric '" + name + "' is not numeric.";
+          if (value.is_number()) {
+            _viewer->log_scalar(name, value.get<double>());
+          } else if (value.is_string()) {
+            _viewer->log_string(name, value.get<string>());
+          } else {
+            _error = "Metric '" + name + "' can't be logged.";
             return return_type::warning;
           }
-          _viewer->log_scalar(name, value.get<double>());
         }
       }
     } catch (const exception& ex) {