Code coverage report for node/src/integrations/express.ts

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import * as Express from 'express';
import {ACCESS_TEMPLATE} from './access-logger';
import {
  LogConfig,
  LogLevel,
  LogOptions,
  logProvider,
  MessageContext,
  templateString,
} from '@btilford/ts-base-core';
 
 
export type AccessLogOptions = LogOptions & {
  useLevel: LogLevel;
  name?: string;
}
 
export function accessLogMiddleware(options: AccessLogOptions): Express.RequestHandler {
  let config: LogConfig;
  const configDefaults = {
    messageTemplate: templateString(ACCESS_TEMPLATE),
  };
 
  Iif (options.parent && options.config) {
    config = options.parent.config.extend({
      ...options.config,
      ...configDefaults
    }, true);
  } else Eif (options.parent) {
    config = options.parent.config.extend(configDefaults, true);
  } else {
    config = LogConfig.create({
      ...options.config,
      ...configDefaults
    });
  }
  const logger = (options?.parent || logProvider()).extend(options.name || 'access', config)
  return function accessLog(req: Express.Request, res: Express.Response, next: Express.NextFunction): any {
 
    next();
 
    const errored = logger.write(options.useLevel, new MessageContext('', {
      timestamp: new Date().toISOString(),
      pid: process.env.pid,
      req: {
        url: req.originalUrl,
        method: req.method,
        ip: (req.header('x-fowarded-for') || '').split(',')[0].trim() || '',
        userAgent: req.header('user-agent')
      },
      res: {
        status: res.statusCode,
        length: res.getHeader('content-length') || 0,
      }
    }));
 
    Iif (errored) {
      process.stderr.write(`ERROR writing access log! ${errored.message} ${errored.stack}`);
    }
  }
}