All files / src/plugins DotToSvgExportPlugin.ts

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import * as Viz from "viz.js";
import * as _ from "lodash";
import {
  IRequestHandler,
  IDotResponse,
  ArgdownPluginError,
  IArgdownResponse,
  IArgdownPlugin,
  IArgdownRequest
} from "@argdown/core";
 
export interface IDotToSvgSettings {}
export interface IDotToSvgRequest {
  dotToSvg?: IDotToSvgSettings;
}
export interface ISvgResponse extends IArgdownResponse {
  svg?: string;
}
export class DotToSvgExportPlugin implements IArgdownPlugin {
  name = "DotToSvgExportPlugin";
  defaults: IDotToSvgSettings;
  constructor(config?: IDotToSvgSettings) {
    this.defaults = _.defaultsDeep({}, config, {});
  }
  prepare: IRequestHandler = (request: IArgdownRequest) => {
    const settings = this.getSettings(request);
    _.defaultsDeep(settings, this.defaults);
  };
  getSettings = (request: IArgdownRequest): IDotToSvgSettings => {
    const r = <IDotToSvgRequest>request;
    r.dotToSvg = r.dotToSvg || {};
    return r.dotToSvg;
  };
  run: IRequestHandler = (_request, response) => {
    const dotResponse = <IDotResponse>response;
    Iif (!dotResponse.dot) {
      throw new ArgdownPluginError(this.name, "Missing dot field in response.");
    }
    (<ISvgResponse>response).svg = Viz(dotResponse.dot);
    return response;
  };
}