"""Webhooks for external integrations.""" import re from typing import Any, Dict, List, Optional, Tuple import ujson from defusedxml.ElementTree import fromstring as xml_fromstring from django.http import HttpRequest, HttpResponse from django.utils.translation import ugettext as _ from zerver.decorator import api_key_only_webhook_view from zerver.lib.request import has_request_variables from zerver.lib.response import json_error, json_success from zerver.lib.webhooks.common import UnexpectedWebhookEventType, check_send_webhook_message from zerver.models import UserProfile def api_pivotal_webhook_v3(request: HttpRequest, user_profile: UserProfile) -> Tuple[str, str]: payload = xml_fromstring(request.body) def get_text(attrs: List[str]) -> str: start = payload try: for attr in attrs: start = start.find(attr) return start.text except AttributeError: return "" event_type = payload.find('event_type').text description = payload.find('description').text project_id = payload.find('project_id').text story_id = get_text(['stories', 'story', 'id']) # Ugh, the URL in the XML data is not a clickable url that works for the user # so we try to build one that the user can actually click on url = f"https://www.pivotaltracker.com/s/projects/{project_id}/stories/{story_id}" # Pivotal doesn't tell us the name of the story, but it's usually in the # description in quotes as the first quoted string name_re = re.compile(r'[^"]+"([^"]+)".*') match = name_re.match(description) if match and len(match.groups()): name = match.group(1) else: name = "Story changed" # Failed for an unknown reason, show something more_info = f" [(view)]({url})." if event_type == 'story_update': subject = name content = description + more_info elif event_type == 'note_create': subject = "Comment added" content = description + more_info elif event_type == 'story_create': issue_desc = get_text(['stories', 'story', 'description']) issue_type = get_text(['stories', 'story', 'story_type']) issue_status = get_text(['stories', 'story', 'current_state']) estimate = get_text(['stories', 'story', 'estimate']) if estimate != '': estimate = f" worth {estimate} story points" subject = name content = f"{description} ({issue_status} {issue_type}{estimate}):\n\n~~~ quote\n{issue_desc}\n~~~\n\n{more_info}" return subject, content UNSUPPORTED_EVENT_TYPES = [ "task_create_activity", "comment_delete_activity", "task_delete_activity", "task_update_activity", "story_move_from_project_activity", "story_delete_activity", "story_move_into_project_activity", "epic_update_activity", ] def api_pivotal_webhook_v5(request: HttpRequest, user_profile: UserProfile) -> Tuple[str, str]: payload = ujson.loads(request.body) event_type = payload["kind"] project_name = payload["project"]["name"] project_id = payload["project"]["id"] primary_resources = payload["primary_resources"][0] story_url = primary_resources["url"] story_type = primary_resources.get("story_type") story_id = primary_resources["id"] story_name = primary_resources["name"] performed_by = payload.get("performed_by", {}).get("name", "") story_info = f"[{project_name}](https://www.pivotaltracker.com/s/projects/{project_id}): [{story_name}]({story_url})" changes = payload.get("changes", []) content = "" subject = f"#{story_id}: {story_name}" def extract_comment(change: Dict[str, Any]) -> Optional[str]: if change.get("kind") == "comment": return change.get("new_values", {}).get("text", None) return None if event_type == "story_update_activity": # Find the changed valued and build a message content += f"{performed_by} updated {story_info}:\n" for change in changes: old_values = change.get("original_values", {}) new_values = change["new_values"] if "current_state" in old_values and "current_state" in new_values: content += "* state changed from **{}** to **{}**\n".format( old_values["current_state"], new_values["current_state"]) if "estimate" in old_values and "estimate" in new_values: old_estimate = old_values.get("estimate", None) if old_estimate is None: estimate = "is now" else: estimate = f"changed from {old_estimate} to" new_estimate = new_values["estimate"] if new_values["estimate"] is not None else "0" content += f"* estimate {estimate} **{new_estimate} points**\n" if "story_type" in old_values and "story_type" in new_values: content += "* type changed from **{}** to **{}**\n".format( old_values["story_type"], new_values["story_type"]) comment = extract_comment(change) if comment is not None: content += f"* Comment added:\n~~~quote\n{comment}\n~~~\n" elif event_type == "comment_create_activity": for change in changes: comment = extract_comment(change) if comment is not None: content += f"{performed_by} added a comment to {story_info}:\n~~~quote\n{comment}\n~~~" elif event_type == "story_create_activity": content += f"{performed_by} created {story_type}: {story_info}\n" for change in changes: new_values = change.get("new_values", {}) if "current_state" in new_values: content += "* State is **{}**\n".format(new_values["current_state"]) if "description" in new_values: content += "* Description is\n\n> {}".format(new_values["description"]) elif event_type == "story_move_activity": content = f"{performed_by} moved {story_info}" for change in changes: old_values = change.get("original_values", {}) new_values = change["new_values"] if "current_state" in old_values and "current_state" in new_values: content += " from **{}** to **{}**.".format(old_values["current_state"], new_values["current_state"]) elif event_type in UNSUPPORTED_EVENT_TYPES: # Known but unsupported Pivotal event types pass else: raise UnexpectedWebhookEventType('Pivotal Tracker', event_type) return subject, content @api_key_only_webhook_view("Pivotal") @has_request_variables def api_pivotal_webhook(request: HttpRequest, user_profile: UserProfile) -> HttpResponse: subject = content = None try: subject, content = api_pivotal_webhook_v3(request, user_profile) except Exception: # Attempt to parse v5 JSON payload subject, content = api_pivotal_webhook_v5(request, user_profile) if not content: return json_error(_("Unable to handle Pivotal payload")) check_send_webhook_message(request, user_profile, subject, content) return json_success()