Graph data structure using Backbone for js

BackboneGraph.js

/*****************************************************
* Class: Graph. Data Structures in JS, Feb 2016
* Anatol Marezhanyi http://linkedin.com/in/merezhany/
* Class: BackboneGraph. Sep 2018
* Developed for BackboneJS by David Apple
*****************************************************/

'use strict'

class BackboneGraph {
	constructor() {
		this.Node = Backbone.Model.extend()
		this.Nodes = Backbone.Collection.extend({
			model: Node
		})
		this.nodes = new this.Nodes
	}

	addNode(data) {
		this.nodes.add(new this.Node(_.extend({
			type: 'node'
		}, data)))
	}

	removeNode(name) {
		this.nodes.remove(this.nodes.where({name: name}))
		this.nodes.remove(this.nodes.where({from: name}))
		this.nodes.remove(this.nodes.where({to: name}))
	}

	hasNode(name) {
		return !!this.nodes.findWhere({name: name})
	}

	addEdge(nodeFrom, nodeTo) {
		if (this.hasNode(nodeFrom) && this.hasNode(nodeTo)) {
			this.addNode({
				type: 'edge',
				from: nodeFrom,
				to: nodeTo
			})
		}
	}

	removeEdge(nodeFrom, nodeTo) {
		if (this.hasNode(nodeFrom) && this.hasNode(nodeTo)) {
			this.nodes.remove(this.nodes.where({from: nodeFrom, to: nodeTo}))
		}
	}

	hasEdge(nodeFrom, nodeTo) {
		return !!this.nodes.findWhere({from: nodeFrom, to: nodeTo})
	}

}