WebSockets: improve surface manifest format and loader

libs/surfaces/websockets/manifest.cc

@@ -18,15 +18,21 @@
 
 #include <iostream>
 #include <sstream>
+
+#include <glibmm/fileutils.h>
 #include <glibmm/miscutils.h>
 
 #include "pbd/xml++.h"
 
 #include "manifest.h"
 
-SurfaceManifest::SurfaceManifest (std::string xml_path)
+static const char* const manifest_filename = "manifest.xml";
+
+SurfaceManifest::SurfaceManifest (std::string path)
+	: _path (path)
 {
 	XMLTree tree;
+	std::string xml_path = Glib::build_filename (_path, manifest_filename);
 
 	if (!tree.read (xml_path.c_str())) {
 #ifndef NDEBUG
@@ -44,25 +50,18 @@ SurfaceManifest::SurfaceManifest (std::string xml_path)
 		
 		node->get_property ("value", value);
 
-		if (name == "Id") {
-			_id = value;
-		} else if (name == "Name") {
+		if (name == "Name") {
 			_name = value;
 		} else if (name == "Description") {
 			_description = value;
 		}
 	}
 
-#ifndef NDEBUG
 	if (_name.empty () || _description.empty ()) {
+#ifndef NDEBUG
 		std::cerr << "SurfaceManifest: missing properties in " << xml_path << std::endl;
-		return;
-	}
 #endif
-
-	if (_id.empty ()) {
-		// default to manifest subdirectory name
-		_id = Glib::path_get_basename (Glib::path_get_dirname (xml_path));
+		return;
 	}
 
 	_valid = true;
@@ -73,11 +72,21 @@ SurfaceManifest::to_json ()
 {
 	std::stringstream ss;
 
+	std::string rel_path = Glib::path_get_basename (Glib::path_get_dirname (_path));
+
 	ss << "{"
-		<< "\"id\":\"" << _id << "\""
+		<< "\"diskPath\":\"" << _path << "\""
+		<< ",\"path\":\"" << rel_path << "\""
 		<< ",\"name\":\"" << _name << "\""
 		<< ",\"description\":\"" << _description << "\""
 		<< "}";
 
 	return ss.str ();
 }
+
+bool
+SurfaceManifest::exists_at_path (std::string path)
+{
+	std::string xml_path = Glib::build_filename (path, manifest_filename);
+	return Glib::file_test (xml_path, Glib::FILE_TEST_EXISTS);
+}

libs/surfaces/websockets/manifest.h

@@ -29,16 +29,18 @@ public:
 
 	bool valid () { return _valid; }
 
-	std::string id () { return _id; }
+	std::string path () { return _path; }
 	std::string name () { return _name; }
 	std::string description () { return _description; }
 
 	std::string to_json ();
 
+	static bool exists_at_path (std::string);
+
 private:
 	bool _valid;
 
-	std::string _id;
+	std::string _path;
 	std::string _name;
 	std::string _description;
 };

libs/surfaces/websockets/resources.cc

@@ -30,7 +30,7 @@
 static const char* const data_dir_env_var = "ARDOUR_WEBSURFACES_PATH";
 static const char* const data_dir_name = "web_surfaces";
 static const char* const builtin_dir_name = "builtin";
-static const char* const manifest_filename = "manifest.xml";
+static const char* const user_dir_name = "user";
 
 static bool
 dir_filter (const std::string &str, void* /*arg*/)
@@ -80,7 +80,7 @@ ServerResources::scan ()
 {
 	std::stringstream ss;
 
-	ss << "{\"builtin\":[";
+	ss << "[{\"path\":\"" << builtin_dir_name << "\",\"surfaces\":[";
 
 	SurfaceManifestVector builtin = read_manifests (builtin_dir ());
 
@@ -91,7 +91,7 @@ ServerResources::scan ()
 		}
 	}
 
-	ss << "],\"user\":[";
+	ss << "]},{\"path\":\"" << user_dir_name << "\",\"surfaces\":[";
 
 	SurfaceManifestVector user = read_manifests (user_dir ());
 
@@ -102,7 +102,7 @@ ServerResources::scan ()
 		}
 	}
 
-	ss << "]}";
+	ss << "]}]";
 
 	return ss.str ();
 }
@@ -143,13 +143,11 @@ ServerResources::read_manifests (std::string dir)
 		0 /*arg*/, true /*pass_fullpath*/, true /*return_fullpath*/, false /*recurse*/);
 
 	for (std::vector<std::string>::const_iterator it = subdirs.begin (); it != subdirs.end (); ++it) {
-		std::string xml_path = Glib::build_filename (*it, manifest_filename);
-
-		if (!Glib::file_test (xml_path, Glib::FILE_TEST_EXISTS)) {
+		if (!SurfaceManifest::exists_at_path (*it)) {
 			continue;
 		}
 
-		SurfaceManifest manifest (xml_path);
+		SurfaceManifest manifest (*it);
 
 		if (manifest.valid ()) {
 			result.push_back (manifest);