mirror of https://github.com/zulip/zulip.git
101 lines
3.8 KiB
Python
101 lines
3.8 KiB
Python
# Webhooks for external integrations.
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import re
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from typing import Any, Dict, Optional
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import orjson
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from django.http import HttpRequest, HttpResponse
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from django.utils.translation import ugettext as _
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from zerver.decorator import api_key_only_webhook_view
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from zerver.lib.exceptions import InvalidJSONError
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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.webhooks.common import check_send_webhook_message
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from zerver.models import UserProfile
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@api_key_only_webhook_view('SlackIncoming')
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@has_request_variables
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def api_slack_incoming_webhook(request: HttpRequest, user_profile: UserProfile,
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user_specified_topic: Optional[str]=REQ("topic", default=None),
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payload: Optional[Dict[str, Any]] = REQ(
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'payload',
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converter=orjson.loads,
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default=None)) -> HttpResponse:
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# Slack accepts webhook payloads as payload="encoded json" as
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# application/x-www-form-urlencoded, as well as in the body as
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# application/json. We use has_request_variables to try to get
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# the form encoded version, and parse the body out ourselves if
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# # we were given JSON.
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if payload is None:
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try:
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payload = orjson.loads(request.body)
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except ValueError: # nocoverage
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raise InvalidJSONError(_("Malformed JSON"))
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if user_specified_topic is None and "channel" in payload:
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user_specified_topic = re.sub("^[@#]", "", payload["channel"])
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if user_specified_topic is None:
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user_specified_topic = "(no topic)"
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body = ""
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if "blocks" in payload:
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for block in payload["blocks"]:
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body = add_block(block, body)
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if "attachments" in payload:
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for attachment in payload["attachments"]:
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body = add_attachment(attachment, body)
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if body == "" and "text" in payload:
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body += payload["text"]
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if "icon_emoji" in payload and payload["icon_emoji"] is not None:
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body = "{} {}".format(payload["icon_emoji"], body)
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if body != "":
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body = replace_formatting(replace_links(body).strip())
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check_send_webhook_message(request, user_profile, user_specified_topic, body)
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return json_success()
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def add_block(block: Dict[str, Any], body: str) -> str:
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block_type = block.get("type", None)
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if block_type == "section":
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if "text" in block:
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text = block["text"]
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while type(text) == dict: # handle stuff like block["text"]["text"]
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text = text["text"]
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body += f"\n\n{text}"
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if "accessory" in block:
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accessory = block["accessory"]
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accessory_type = accessory["type"]
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if accessory_type == "image":
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# This should become  once proper Markdown images are supported
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body += "\n[{alt_text}]({image_url})".format(**accessory)
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return body
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def add_attachment(attachment: Dict[str, Any], body: str) -> str:
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attachment_body = ""
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if "title" in attachment and "title_link" in attachment:
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attachment_body += "[{title}]({title_link})\n".format(**attachment)
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if "text" in attachment:
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attachment_body += attachment["text"]
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return body + attachment_body
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def replace_links(text: str) -> str:
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return re.sub(r"<(\w+?:\/\/.*?)\|(.*?)>", r"[\2](\1)", text)
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def replace_formatting(text: str) -> str:
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# Slack uses *text* for bold, whereas Zulip interprets that as italics
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text = re.sub(r'([^\w])\*(?!\s+)([^\*^\n]+)(?<!\s)\*([^\w])', r"\1**\2**\3", text)
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# Slack uses _text_ for emphasis, whereas Zulip interprets that as nothing
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text = re.sub(r"([^\w])[_](?!\s+)([^\_\^\n]+)(?<!\s)[_]([^\w])", r"\1**\2**\3", text)
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return text
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