making json loader

1 files changed, 72 insertions, 0 deletions

diff --git a/NT/src/graph.cpp b/NT/src/graph.cpp
index 50aaa0c..6c8ccf2 100644
--- a/NT/src/graph.cpp
+++ b/NT/src/graph.cpp
@@ -1,4 +1,76 @@
 #include "graph.h"
 
+using namespace Rotor;
+using namespace std;
 
+bool Graph::check_audio(string audio,string path){
+	if (audio!="")	{
+		audio_filename=path+audio;
+		Poco::File f=Poco::File(audio_filename);
+		if (f.exists()) {
+			//here we should check the audio is actually valid
+			audio_loaded=true;
+			cerr<<"Rotor: loading "<<audio_filename<<" from graph"<<endl;
+			return true;
+		}
+		cerr<<"Rotor: audio file "<<audio_filename<<" not found"<<endl;
+	}
+	return false;
+}
+bool Graph::load_file(std::string filename,std::string media_path){
+	Poco::File f=Poco::File(filename);
+	if (f.exists()) {
+		Poco::FileInputStream fis(filename);
+		Poco::CountingInputStream countingIstr(fis);
+		std::string str;
+		Poco::StreamCopier::copyToString(countingIstr, str);
+		return parse_json(str,media_path);
+	}
+	cerr<<"Rotor: graph "<<filename<<" not found"<<endl;
+	return false;
+}
+bool Graph::parse_json(string &data,string &media_path){
+	Json::Value root;   // will contain the root value after parsing.
+	Json::Reader reader;
+	bool parsingSuccessful = reader.parse( data, root );
+	if ( !parsingSuccessful )
+	{
+	    std::cout  << "Failed to parse configuration\n"
+	               << reader.getFormattedErrorMessages();
+	    return false;
+	}
+	//The json validates, now we should attempt to retain nodes which haven't changed
+	//for now just clear the existing graph
+	clear();
+	Node_factory factory;
+	check_audio(root["audio"].asString(),media_path);
+	init(root["id"].asString(),root["description"].asString());
+	Json::Value jnodes = root["nodes"];
+	for ( uint32_t i = 0; i < jnodes.size(); ++i ) {
+		string node_id=jnodes[i]["id"].asString();
+		Node* node=factory.create(jnodes[i]);
+		if (node) {
+			if (nodes.find(node_id)==nodes.end()){
+				cerr << "Rotor: creating node '"<<node_id<<"': '"<<jnodes[i]["type"].asString()<< "'" << endl;
+				//kind of have to do the links from outside thus
+				//how do deal with variable arrays?
+				//
+				//on our left.. an array of pointers to variables.. 
+				//some of which contain arrays of pointers to variables
+				//
+				//on our right.. an unordered map of nodes to be linked to
+				for (auto var: node->vars){
 
+
+				}
+				nodes[node_id]=node;
+			}
+			else cerr << "ERROR: duplicate node '"<<node_id<<"' "<< endl;
+		}
+		else {
+			cerr << "ERROR: graph loader cannot find node '" <<jnodes[i]["type"].asString()<< "'" << endl;
+			return false;
+		}
+	}
+	return true;
+}