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96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
# Webhooks for external integrations.
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import re
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from django.http import HttpRequest, HttpResponse
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from zerver.decorator import webhook_view
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from zerver.lib.exceptions import UnsupportedWebhookEventTypeError
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from zerver.lib.request import REQ, has_request_variables
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from zerver.lib.response import json_success
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from zerver.lib.validator import WildValue, check_int, check_none_or, check_string, to_wild_value
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from zerver.lib.webhooks.common import check_send_webhook_message
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from zerver.models import UserProfile
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TOPIC_TEMPLATE = "{service_url}"
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def send_message_for_event(
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request: HttpRequest, user_profile: UserProfile, event: WildValue
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) -> None:
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event_type = get_event_type(event)
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subject = TOPIC_TEMPLATE.format(service_url=event["check"]["url"].tame(check_string))
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body = EVENT_TYPE_BODY_MAPPER[event_type](event)
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check_send_webhook_message(request, user_profile, subject, body, event_type)
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def get_body_for_up_event(event: WildValue) -> str:
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body = "Service is `up`"
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event_downtime = event["downtime"]
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if event_downtime["started_at"].tame(check_none_or(check_string)):
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body = f"{body} again"
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duration = event_downtime["duration"].tame(check_none_or(check_int))
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if duration:
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string_date = get_time_string_based_on_duration(duration)
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if string_date:
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body = f"{body} after {string_date}"
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return f"{body}."
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def get_time_string_based_on_duration(duration: int) -> str:
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days, reminder = divmod(duration, 86400)
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hours, reminder = divmod(reminder, 3600)
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minutes, seconds = divmod(reminder, 60)
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string_date = ""
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string_date += add_time_part_to_string_date_if_needed(days, "day")
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string_date += add_time_part_to_string_date_if_needed(hours, "hour")
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string_date += add_time_part_to_string_date_if_needed(minutes, "minute")
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string_date += add_time_part_to_string_date_if_needed(seconds, "second")
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return string_date.rstrip()
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def add_time_part_to_string_date_if_needed(value: int, text_name: str) -> str:
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if value == 1:
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return f"1 {text_name} "
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if value > 1:
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return f"{value} {text_name}s "
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return ""
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def get_body_for_down_event(event: WildValue) -> str:
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return "Service is `down`. It returned a {} error at {}.".format(
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event["downtime"]["error"].tame(check_none_or(check_string)),
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event["downtime"]["started_at"]
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.tame(check_string) # started_at is not None in a "down" event.
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.replace("T", " ")
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.replace("Z", " UTC"),
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)
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EVENT_TYPE_BODY_MAPPER = {
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"up": get_body_for_up_event,
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"down": get_body_for_down_event,
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}
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ALL_EVENT_TYPES = list(EVENT_TYPE_BODY_MAPPER.keys())
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@webhook_view("Updown", all_event_types=ALL_EVENT_TYPES)
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@has_request_variables
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def api_updown_webhook(
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request: HttpRequest,
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user_profile: UserProfile,
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payload: WildValue = REQ(argument_type="body", converter=to_wild_value),
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) -> HttpResponse:
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for event in payload:
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send_message_for_event(request, user_profile, event)
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return json_success(request)
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def get_event_type(event: WildValue) -> str:
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event_type_match = re.match("check.(.*)", event["event"].tame(check_string))
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if event_type_match:
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event_type = event_type_match.group(1)
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if event_type in EVENT_TYPE_BODY_MAPPER:
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return event_type
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raise UnsupportedWebhookEventTypeError(event["event"].tame(check_string))
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