WebSockets: add version field in manifests and update loader

libs/surfaces/websockets/manifest.cc

@@ -54,10 +54,12 @@ SurfaceManifest::SurfaceManifest (std::string path)
 			_name = value;
 		} else if (name == "Description") {
 			_description = value;
+		} else if (name == "Version") {
+			_version = value;
 		}
 	}
 
-	if (_name.empty () || _description.empty ()) {
+	if (_name.empty () || _description.empty () || _version.empty ()) {
 #ifndef NDEBUG
 		std::cerr << "SurfaceManifest: missing properties in " << xml_path << std::endl;
 #endif
@@ -76,6 +78,7 @@ SurfaceManifest::to_json ()
 		<< "\"path\":\"" << Glib::path_get_basename (_path) << "\""
 		<< ",\"name\":\"" << _name << "\""
 		<< ",\"description\":\"" << _description << "\""
+		<< ",\"version\":\"" << _version << "\""
 		<< "}";
 
 	return ss.str ();

libs/surfaces/websockets/manifest.h

@@ -24,7 +24,7 @@
 class SurfaceManifest
 {
 public:
-	// all ardour control surfaces store presets in xml format
+	// all ardour control surfaces implement presets using xml format
 	SurfaceManifest (std::string);
 
 	bool valid () { return _valid; }
@@ -32,6 +32,7 @@ public:
 	std::string path () { return _path; }
 	std::string name () { return _name; }
 	std::string description () { return _description; }
+	std::string version () { return _version; }
 
 	std::string to_json ();
 
@@ -43,6 +44,7 @@ private:
 	std::string _path;
 	std::string _name;
 	std::string _description;
+	std::string _version;
 };
 
 #endif // _ardour_surface_websockets_manifest_h_

share/web_surfaces/builtin/mixer-demo/manifest.xml

@@ -2,4 +2,5 @@
 <WebSurface>
   <Name value="Mixer Demo"/>
   <Description value="Mixer control capabilities demo aimed at developers"/>
+  <Version value="1.0.0"/>
 </WebSurface>

share/web_surfaces/builtin/transport/manifest.xml

@@ -2,4 +2,5 @@
 <WebSurface>
   <Name value="Transport"/>
   <Description value="Provides basic transport control (under construction)"/>
+  <Version value="1.0.0"/>
 </WebSurface>