RequestInfoPlugin.ts

import { IRequestInfo } from '../../models/IRequestInfo';
import { Utils } from '../../Utils';
import { EventPluginContext } from '../EventPluginContext';
import { IEventPlugin } from '../IEventPlugin';

export class RequestInfoPlugin implements IEventPlugin {
  public priority: number = 70;
  public name: string = 'RequestInfoPlugin';

  public run(context: EventPluginContext, next?: () => void): void {
    const REQUEST_KEY: string = '@request'; // optimization for minifier.

    const config = context.client.config;
    const collector = config.requestInfoCollector;
    if (!context.event.data[REQUEST_KEY] && !!collector) {
      const requestInfo: IRequestInfo = collector.getRequestInfo(context);
      if (!!requestInfo) {
        if (Utils.isMatch(requestInfo.user_agent, config.userAgentBotPatterns)) {
          context.log.info('Cancelling event as the request user agent matches a known bot pattern');
          context.cancelled = true;
        } else {
          context.event.data[REQUEST_KEY] = requestInfo;
        }
      }
    }

    next && next();
  }
}