graphviz-builder/lib/Edge.ts

import { EdgeStyles } from './Styles';
import { Color } from './Color';

export class Edge {
  public origin: string;
  public target: string;
  public style?: EdgeStyles;
  public color?: Color;
  private _directional: boolean;

  public constructor (origin: string, target: string, directional: boolean) {
    this.origin = origin;
    this.target = target;
    this._directional = directional;
  }

  // eslint-disable-next-line @typescript-eslint/naming-convention
  public toString (): string {
    const attributes = [];
    if (this.style)
      attributes.push ({ name: 'style', value: this.style.toString () });
    if (this.color)
      attributes.push ({ name: 'color', value: this.color.toString () });

    const attr_string = ` [${attributes.map ((v) => `${v.name}="${v.value}"`)
      .join (',')}]`;

    return `${this.origin} -${
      this._directional ? '>' : '-'
    } ${this.target}${attributes.length > 0
      ? attr_string
      : ''}`;
  }
}