old_contents: from typing import Any, Dict
  
  from django.http import HttpRequest, HttpResponse
  
  from zerver.decorator import webhook_view
  from zerver.lib.request import REQ, has_request_variables
  from zerver.lib.response import json_success
  from zerver.lib.webhooks.common import check_send_webhook_message
  from zerver.models import UserProfile
  
  ALL_EVENT_TYPES = ["new", "finished"]
  
  
  @webhook_view("Buildbot", all_event_types=ALL_EVENT_TYPES)
  @has_request_variables
  def api_buildbot_webhook(
      request: HttpRequest,
      user_profile: UserProfile,
      payload: Dict[str, Any] = REQ(argument_type="body"),
  ) -> HttpResponse:
      topic = payload["project"]
      if not topic:
          topic = "general"
      body = get_message(payload)
      check_send_webhook_message(request, user_profile, topic, body, payload["event"])
      return json_success(request)
  
  
  def get_message(payload: Dict[str, Any]) -> str:
      if "results" in payload:
          # See http://docs.buildbot.net/latest/developer/results.html
          results = ("success", "warnings", "failure", "skipped", "exception", "retry", "cancelled")
          status = results[payload["results"]]
  
      if payload["event"] == "new":
          body = "Build [#{id}]({url}) for **{name}** started.".format(
              id=payload["buildid"],
              name=payload["buildername"],
              url=payload["url"],
          )
      elif payload["event"] == "finished":
          body = "Build [#{id}]({url}) (result: {status}) for **{name}** finished.".format(
              id=payload["buildid"],
              name=payload["buildername"],
              url=payload["url"],
              status=status,
          )
  
      return body
  
new_contents: from django.http import HttpRequest, HttpResponse
  
  from zerver.decorator import webhook_view
  from zerver.lib.request import REQ, has_request_variables
  from zerver.lib.response import json_success
  from zerver.lib.validator import WildValue, check_int, check_string, to_wild_value
  from zerver.lib.webhooks.common import check_send_webhook_message
  from zerver.models import UserProfile
  
  ALL_EVENT_TYPES = ["new", "finished"]
  
  
  @webhook_view("Buildbot", all_event_types=ALL_EVENT_TYPES)
  @has_request_variables
  def api_buildbot_webhook(
      request: HttpRequest,
      user_profile: UserProfile,
      payload: WildValue = REQ(argument_type="body", converter=to_wild_value),
  ) -> HttpResponse:
      topic = payload["project"].tame(check_string)
      if not topic:
          topic = "general"
      body = get_message(payload)
      check_send_webhook_message(
          request, user_profile, topic, body, payload["event"].tame(check_string)
      )
      return json_success(request)
  
  
  def get_message(payload: WildValue) -> str:
      if "results" in payload:
          # See http://docs.buildbot.net/latest/developer/results.html
          results = ("success", "warnings", "failure", "skipped", "exception", "retry", "cancelled")
          status = results[payload["results"].tame(check_int)]
  
      event = payload["event"].tame(check_string)
      if event == "new":
          body = "Build [#{id}]({url}) for **{name}** started.".format(
              id=payload["buildid"].tame(check_int),
              name=payload["buildername"].tame(check_string),
              url=payload["url"].tame(check_string),
          )
      elif event == "finished":
          body = "Build [#{id}]({url}) (result: {status}) for **{name}** finished.".format(
              id=payload["buildid"].tame(check_int),
              name=payload["buildername"].tame(check_string),
              url=payload["url"].tame(check_string),
              status=status,
          )
  
      return body
  
subject: Strengthen types using WildValue.