import {Graph} from "./graph";
import {SerializableItem} from "../helper/serializableitem";

export class GraphElement extends SerializableItem {
    protected isNode: boolean;
    protected isLink: boolean;

    public graph: Graph;

    constructor(graph: Graph = undefined) {
        super();
        this.graph = graph;
        this.isNode = false;
        this.isLink = false;
    }

    public get node(): boolean {
        return this.isNode;
    }

    public get link(): boolean {
        return this.isLink;
    }

    /**
     * Removes element from its parent graph.
     * @returns True, if successful.
     */
    public delete(): boolean {
        throw new Error("Function \"delete()\" has not been implemented.");
    }

    /**
     * Adds the element to the given graph.
     * @param graph Graph to add element to.
     * @returns True, if successful.
     */
    public add(graph: Graph = this.graph): boolean {
        throw new Error("Function \"add(graph)\" has not been implemented.");
    }

    /**
     * Needs to be implemented to create a filtered version for storing in the data history.
     * @returns Filtered object.
     */
    public getCleanInstance(): any {
        throw new Error("Function \"getCleanInstance()\" has not been implemented.");
    }
}