old_contents: from typing import Any, Dict, Sequence, Tuple
  
  from django.http import HttpRequest, HttpResponse
  
  from zerver.decorator import webhook_view
  from zerver.lib.exceptions import UnsupportedWebhookEventType
  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,
      get_http_headers_from_filename,
      validate_extract_webhook_http_header,
  )
  from zerver.models import UserProfile
  
  ALL_EVENT_TYPES = [
      "deploy_failed",
      "deploy_locked",
      "deploy_unlocked",
      "deploy_building",
      "deploy_created",
  ]
  
  fixture_to_headers = get_http_headers_from_filename("HTTP_X_NETLIFY_EVENT")
  
  
  @webhook_view("Netlify", all_event_types=ALL_EVENT_TYPES)
  @has_request_variables
  def api_netlify_webhook(
      request: HttpRequest,
      user_profile: UserProfile,
      payload: Dict[str, Sequence[Dict[str, Any]]] = REQ(argument_type="body"),
  ) -> HttpResponse:
  
      message_template, event = get_template(request, payload)
  
      body = message_template.format(
          build_name=payload["name"],
          build_url=payload["url"],
          branch_name=payload["branch"],
          state=payload["state"],
      )
  
      topic = "{topic}".format(topic=payload["branch"])
  
      check_send_webhook_message(request, user_profile, topic, body, event)
  
      return json_success(request)
  
  
  def get_template(request: HttpRequest, payload: Dict[str, Any]) -> Tuple[str, str]:
  
      message_template = "The build [{build_name}]({build_url}) on branch {branch_name} "
      event = validate_extract_webhook_http_header(request, "X-Netlify-Event", "Netlify")
  
      if event == "deploy_failed":
          message_template += payload["error_message"]
      elif event == "deploy_locked":
          message_template += "is now locked."
      elif event == "deploy_unlocked":
          message_template += "is now unlocked."
      elif event in ALL_EVENT_TYPES:
          message_template += "is now {state}.".format(state=payload["state"])
      else:
          raise UnsupportedWebhookEventType(event)
  
      return message_template, event
  
new_contents: from typing import Tuple
  
  from django.http import HttpRequest, HttpResponse
  
  from zerver.decorator import webhook_view
  from zerver.lib.exceptions import UnsupportedWebhookEventType
  from zerver.lib.request import REQ, has_request_variables
  from zerver.lib.response import json_success
  from zerver.lib.validator import WildValue, check_string, to_wild_value
  from zerver.lib.webhooks.common import (
      check_send_webhook_message,
      get_http_headers_from_filename,
      validate_extract_webhook_http_header,
  )
  from zerver.models import UserProfile
  
  ALL_EVENT_TYPES = [
      "deploy_failed",
      "deploy_locked",
      "deploy_unlocked",
      "deploy_building",
      "deploy_created",
  ]
  
  fixture_to_headers = get_http_headers_from_filename("HTTP_X_NETLIFY_EVENT")
  
  
  @webhook_view("Netlify", all_event_types=ALL_EVENT_TYPES)
  @has_request_variables
  def api_netlify_webhook(
      request: HttpRequest,
      user_profile: UserProfile,
      payload: WildValue = REQ(argument_type="body", converter=to_wild_value),
  ) -> HttpResponse:
  
      message_template, event = get_template(request, payload)
  
      body = message_template.format(
          build_name=payload["name"].tame(check_string),
          build_url=payload["url"].tame(check_string),
          branch_name=payload["branch"].tame(check_string),
          state=payload["state"].tame(check_string),
      )
  
      topic = "{topic}".format(topic=payload["branch"].tame(check_string))
  
      check_send_webhook_message(request, user_profile, topic, body, event)
  
      return json_success(request)
  
  
  def get_template(request: HttpRequest, payload: WildValue) -> Tuple[str, str]:
  
      message_template = "The build [{build_name}]({build_url}) on branch {branch_name} "
      event = validate_extract_webhook_http_header(request, "X-Netlify-Event", "Netlify")
  
      if event == "deploy_failed":
          message_template += payload["error_message"].tame(check_string)
      elif event == "deploy_locked":
          message_template += "is now locked."
      elif event == "deploy_unlocked":
          message_template += "is now unlocked."
      elif event in ALL_EVENT_TYPES:
          message_template += "is now {state}.".format(state=payload["state"].tame(check_string))
      else:
          raise UnsupportedWebhookEventType(event)
  
      return message_template, event
  
subject: Strengthen types using WildValue.