Use Slack V2 OAuth flow

CHANGELOG.md

@@ -5,6 +5,7 @@ All notable changes to this project will be documented in this file.
 
 ### Improvements
 - Rate limiting for Telegram notifications (10 notifications per chat per minute)
+- Use Slack V2 OAuth flow
 
 ### Bug Fixes
 - "Get a single check" API call now supports read-only API keys (#346)

hc/api/models.py

@@ -528,7 +528,11 @@ class Channel(models.Model):
             return None
 
         doc = json.loads(self.value)
-        return doc["team_name"]
+        if "team_name" in doc:
+            return doc["team_name"]
+
+        if "team" in doc:
+            return doc["team"]["name"]
 
     @property
     def slack_channel(self):

hc/front/views.py

@@ -1037,7 +1037,7 @@ def add_slack_btn(request, code):
     project = _get_project_for_user(request, code)
 
     state = token_urlsafe()
-    authorize_url = "https://slack.com/oauth/authorize?" + urlencode(
+    authorize_url = "https://slack.com/oauth/v2/authorize?" + urlencode(
         {
             "scope": "incoming-webhook",
             "client_id": settings.SLACK_CLIENT_ID,
@@ -1071,7 +1071,7 @@ def add_slack_complete(request):
         return HttpResponseForbidden()
 
     result = requests.post(
-        "https://slack.com/api/oauth.access",
+        "https://slack.com/api/oauth.v2.access",
         {
             "client_id": settings.SLACK_CLIENT_ID,
             "client_secret": settings.SLACK_CLIENT_SECRET,