diff -r b43dd87f7ffa -r 948283342245 server/src/main/webapp/js/models.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/server/src/main/webapp/js/models.js	Mon Aug 20 16:07:15 2012 +0200
@@ -0,0 +1,148 @@
+(function() {
+	
+	var root = this;
+		
+	var Backbone = root.Backbone;
+	
+	var Models = root.Rkns.Models = {};
+	
+	
+	Models.getUID = function(obj) {
+		var guid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
+		    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
+		    return v.toString(16);
+		});
+		return obj.type + "-" + guid; 
+	};
+	
+	
+	var RenkanModel = Backbone.RelationalModel.extend({
+		idAttribute : "_id",
+		constructor: function(options) {
+			
+			if (typeof options !== "undefined") {
+	            options._id = options.id || Models.getUID(this);
+	            options.title = options.title || "(untitled " + this.type + ")";
+	            options.description = options.description || "";
+	            options.uri = options.uri || "";
+	            
+	            if(typeof this.prepare === "function") {
+	            	options = this.prepare(options);
+	            }
+			}
+			Backbone.RelationalModel.prototype.constructor.call(this, options);
+		},
+		validate: function() {
+			if(!this.type) {
+				return "object has no type";
+			}
+		},
+		addReference : function(_options, _propName, _list, _id, _default) {
+		    var _element = _list.get(_id);
+		    if (typeof _element === "undefined" && typeof _default !== "undefined") {
+		        _options[_propName ] = _default;
+		    }
+		    else {
+		    	_options[_propName ] = _element;
+		    }
+		}
+	});
+	
+		
+	// USER
+	var User = Models.User = root.Rkns.Models.User = RenkanModel.extend({
+		type: "user",
+		prepare: function(options) {
+			options.color = options.color || "#666666";
+			return options;
+		}	
+	
+	});
+	
+	// NODE
+	var Node = Models.Node = root.Rkns.Models.Node = RenkanModel.extend({
+		type: "node",
+		relations: [{
+			type: Backbone.HasOne,
+			key: "created_by",
+			relatedModel: User
+		}],
+		prepare: function(options) {
+			project = options.project;
+			this.addReference(options, "created_by", project.get("users"), options.created_by, project.current_user);
+			options.description = options.description || "";			
+			return options;
+		}
+	
+	});
+	
+	// EDGE
+	var Edge = Models.Edge = root.Rkns.Models.Edge = RenkanModel.extend({
+		type: "edge",
+		relations: [
+		  {
+			type: Backbone.HasOne,
+			key: "created_by",
+			relatedModel: User
+		  },
+		  {
+		    type: Backbone.HasOne,
+			key: "from",
+			relatedModel: Node
+		  },
+		  {
+		    type: Backbone.HasOne,
+			key: "to",
+			relatedModel: Node
+		  },
+		],
+		prepare: function(options) {
+			project = options.project;
+			this.addReference(options, "created_by", options.created_by, project.get("users"), project.current_user);
+			this.addReference(options, "from", options.from, project.get("nodes"));
+			this.addReference(options, "to", options.to, project.get("nodes"));
+			return options;
+		}
+	});
+		
+	// PROJECT
+	var Project = Models.Project = root.Rkns.Models.Project = RenkanModel.extend({
+		type: "project",
+		relations: [
+		  {
+		    type: Backbone.HasMany,
+		    key: "users",
+		    relatedModel: User,
+		    reverseRelation: {
+	            key: 'project',
+	            includeInJSON: '_id'
+	        },
+		  },
+		  {
+		    type: Backbone.HasMany,
+		    key: "nodes",
+		    relatedModel: Node,
+		    reverseRelation: {
+	            key: 'project',
+	            includeInJSON: '_id'
+	        },
+		  },
+		  {
+		    type: Backbone.HasMany,
+		    key: "edges",
+		    relatedModel: Edge,
+		    reverseRelation: {
+	            key: 'project',
+	            includeInJSON: '_id'
+	        },
+		  }
+		],
+		addNode: function(_props) {
+			_props.project = this;
+			this.get("nodes").push(_props);
+		}
+	});
+
+	
+}).call(this);
+