async checkExistingRoutes()

in source/networkFirewallAutomation/lib/ec2-manager.ts [124:151]
26 lines of code
13 McCabe index (conditional complexity)

  async checkExistingRoutes(routeTable: EC2.RouteTable): Promise<boolean> {
    const routes = routeTable.Routes
    Logger.log(LOG_LEVEL.DEBUG, `print routes`)
    Logger.log(LOG_LEVEL.DEBUG, routes)
    if (routes) {
      for (let route of routes) {
        Logger.log(LOG_LEVEL.DEBUG, `Checking route below for VPC Endpoint: ${this.vpcEndpoint}`)
        Logger.log(LOG_LEVEL.DEBUG, route)
        if (route.GatewayId && route.GatewayId === this.vpcEndpoint &&
          route.DestinationCidrBlock === Route.default && route.State === Route.active) {
          Logger.log(LOG_LEVEL.INFO, `Found Firewall VPC Endpoint ${route.GatewayId}`)
          Logger.log(LOG_LEVEL.INFO, `setting foundExistingRoute to TRUE`)
          return Promise.resolve(true)
        } else if (route.GatewayId && route.GatewayId != this.vpcEndpoint && route.DestinationCidrBlock === Route.default && route.State === Route.active) {
          //remove the route entry as possibly the firewall end point is no longer the same as it was earlier.
          if (routeTable.RouteTableId) {
            await this.service.deleteRoute({
              DestinationCidrBlock: Route.default,
              RouteTableId: routeTable.RouteTableId
            })
          }
        }
      }
    }
    // return false - could not find existing route
    Logger.log(LOG_LEVEL.INFO, `Firewall VPC Endpoint not found as destination in the route table.`)
    return Promise.resolve(false)
  }