prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Integrate Forums into challenges 
  Navigating to the forum of a challenge currently takes the participant outside of the challenge environment. Navigating back to the challenge is not possible through the breadcrumbs on the forum page and instead requires going via the Challenge tab and searching for the respective Challenge again. It would be nicer if the forums were visually integrated into the challenge page layout and if the breadcrumbs reflected their nesting in the challenge rather than their nesting under all forum on GC. 
  
  See here: https://github.com/DIAGNijmegen/rse-roadmap/issues/83#issuecomment-919250835
  
  
  </issue>
  <code>
  [start of app/grandchallenge/forum_conversation/templatetags/forum_extras.py]
  1 from actstream.models import Follow
  2 from django import template
  3 from django.contrib.contenttypes.models import ContentType
  4 
  5 from grandchallenge.notifications.forms import FollowForm
  6 
  7 register = template.Library()
  8 
  9 
  10 @register.simple_tag
  11 def get_follow_object_pk(user, follow_object):
  12     object_follows_for_user = Follow.objects.filter(
  13         user=user,
  14         content_type=ContentType.objects.get(
  15             app_label=follow_object._meta.app_label,
  16             model=follow_object._meta.model_name,
  17         ),
  18     ).all()
  19 
  20     if not object_follows_for_user:
  21         current_follow_object = []
  22     else:
  23         current_follow_object = []
  24         for obj in object_follows_for_user:
  25             if not obj.follow_object:
  26                 continue
  27             elif obj.follow_object.id == follow_object.id:
  28                 current_follow_object = obj.pk
  29     return current_follow_object
  30 
  31 
  32 @register.simple_tag
  33 def follow_form(*, user, object_id, content_type):
  34     return FollowForm(
  35         user=user,
  36         initial={
  37             "object_id": object_id,
  38             "content_type": content_type,
  39             "actor_only": False,
  40         },
  41     )
  42 
  43 
  44 @register.simple_tag()
  45 def get_content_type(follow_object):
  46     try:
  47         ct = ContentType.objects.get(
  48             app_label=follow_object._meta.app_label,
  49             model=follow_object._meta.model_name,
  50         )
  51     except AttributeError:
  52         ct = None
  53     return ct
  54
  [end of app/grandchallenge/forum_conversation/templatetags/forum_extras.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/app/grandchallenge/forum_conversation/templatetags/forum_extras.py b/app/grandchallenge/forum_conversation/templatetags/forum_extras.py
  --- a/app/grandchallenge/forum_conversation/templatetags/forum_extras.py
  +++ b/app/grandchallenge/forum_conversation/templatetags/forum_extras.py
  @@ -51,3 +51,9 @@
       except AttributeError:
           ct = None
       return ct
  +
  +
  +@register.simple_tag()
  +def is_participant(user, challenge):
  +    if challenge.is_participant(user):
  +        return True
  
verification_info: {"golden_diff": "diff --git a/app/grandchallenge/forum_conversation/templatetags/forum_extras.py b/app/grandchallenge/forum_conversation/templatetags/forum_extras.py\n--- a/app/grandchallenge/forum_conversation/templatetags/forum_extras.py\n+++ b/app/grandchallenge/forum_conversation/templatetags/forum_extras.py\n@@ -51,3 +51,9 @@\n     except AttributeError:\r\n         ct = None\r\n     return ct\r\n+\r\n+\r\n+@register.simple_tag()\r\n+def is_participant(user, challenge):\r\n+    if challenge.is_participant(user):\r\n+        return True\n", "issue": "Integrate Forums into challenges \nNavigating to the forum of a challenge currently takes the participant outside of the challenge environment. Navigating back to the challenge is not possible through the breadcrumbs on the forum page and instead requires going via the Challenge tab and searching for the respective Challenge again. It would be nicer if the forums were visually integrated into the challenge page layout and if the breadcrumbs reflected their nesting in the challenge rather than their nesting under all forum on GC. \r\n\r\nSee here: https://github.com/DIAGNijmegen/rse-roadmap/issues/83#issuecomment-919250835\r\n\n", "before_files": [{"content": "from actstream.models import Follow\r\nfrom django import template\r\nfrom django.contrib.contenttypes.models import ContentType\r\n\r\nfrom grandchallenge.notifications.forms import FollowForm\r\n\r\nregister = template.Library()\r\n\r\n\r\n@register.simple_tag\r\ndef get_follow_object_pk(user, follow_object):\r\n    object_follows_for_user = Follow.objects.filter(\r\n        user=user,\r\n        content_type=ContentType.objects.get(\r\n            app_label=follow_object._meta.app_label,\r\n            model=follow_object._meta.model_name,\r\n        ),\r\n    ).all()\r\n\r\n    if not object_follows_for_user:\r\n        current_follow_object = []\r\n    else:\r\n        current_follow_object = []\r\n        for obj in object_follows_for_user:\r\n            if not obj.follow_object:\r\n                continue\r\n            elif obj.follow_object.id == follow_object.id:\r\n                current_follow_object = obj.pk\r\n    return current_follow_object\r\n\r\n\r\n@register.simple_tag\r\ndef follow_form(*, user, object_id, content_type):\r\n    return FollowForm(\r\n        user=user,\r\n        initial={\r\n            \"object_id\": object_id,\r\n            \"content_type\": content_type,\r\n            \"actor_only\": False,\r\n        },\r\n    )\r\n\r\n\r\n@register.simple_tag()\r\ndef get_content_type(follow_object):\r\n    try:\r\n        ct = ContentType.objects.get(\r\n            app_label=follow_object._meta.app_label,\r\n            model=follow_object._meta.model_name,\r\n        )\r\n    except AttributeError:\r\n        ct = None\r\n    return ct\r\n", "path": "app/grandchallenge/forum_conversation/templatetags/forum_extras.py"}]}