ostatus remote follow views

bookwyrm/urls.py

@@ -44,6 +44,7 @@ urlpatterns = [
     re_path(r"^api/v1/instance/?$", views.instance_info),
     re_path(r"^api/v1/instance/peers/?$", views.peers),
     re_path(r"^opensearch.xml$", views.opensearch, name="opensearch"),
+    re_path(r"^ostatus_subscribe/?$", views.ostatus_follow_request),
     # polling updates
     re_path("^api/updates/notifications/?$", views.get_notification_count),
     re_path("^api/updates/stream/(?P<stream>[a-z]+)/?$", views.get_unread_status_count),
@@ -450,4 +451,6 @@ urlpatterns = [
     re_path(r"^unfollow/?$", views.unfollow, name="unfollow"),
     re_path(r"^accept-follow-request/?$", views.accept_follow_request),
     re_path(r"^delete-follow-request/?$", views.delete_follow_request),
+    # re_path(r"^ostatus_follow/?$", views.remote_follow),
+    re_path(r"^ostatus_success/?$", views.ostatus_follow_success, name="ostatus-success"),
 ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

bookwyrm/views/__init__.py

@@ -58,7 +58,7 @@ from .author import Author, EditAuthor
 from .directory import Directory
 from .discover import Discover
 from .feed import DirectMessage, Feed, Replies, Status
-from .follow import follow, unfollow
+from .follow import follow, unfollow, ostatus_follow_request, ostatus_follow_success
 from .follow import accept_follow_request, delete_follow_request
 from .get_started import GetStartedBooks, GetStartedProfile, GetStartedUsers
 from .goal import Goal, hide_goal

bookwyrm/views/follow.py

@@ -1,11 +1,14 @@
 """ views for actions you can take in the application """
+import urllib.parse
+import re
 from django.contrib.auth.decorators import login_required
 from django.db import IntegrityError
 from django.shortcuts import get_object_or_404, redirect
+from django.template.response import TemplateResponse
 from django.views.decorators.http import require_POST
 
 from bookwyrm import models
-from .helpers import get_user_from_username
+from .helpers import get_user_from_username, handle_remote_webfinger
 
 
 @login_required
@@ -23,9 +26,13 @@ def follow(request):
     except IntegrityError:
         pass
 
+    if request.GET.get("next"):
+        return redirect(request.GET.get("next", "/"))
+
     return redirect(to_follow.local_path)
 
 
+
 @login_required
 @require_POST
 def unfollow(request):
@@ -84,3 +91,76 @@ def delete_follow_request(request):
 
     follow_request.delete()
     return redirect(f"/user/{request.user.localname}")
+
+def ostatus_follow_request(request):
+    """prepare an outgoing remote follow request"""
+
+    # parse the acct URI into a user string
+    uri = urllib.parse.unquote(request.GET.get("acct"))
+    username_parts = re.search("(?:^http(?:s?):\/\/)([\w\-\.]*)(?:.)*(?:(?:\/)([\w]*))", uri)
+    account = f"{username_parts[2]}@{username_parts[1]}"
+    user = handle_remote_webfinger(account)
+    error = None
+
+    if user is None or user == "":
+        error = "ostatus_subscribe"
+
+    if bool(user) and user in request.user.blocks.all():
+        error = "is_blocked"
+
+    if hasattr(user, "followers") and request.user in user.followers.all():
+        error = "already_following"
+
+    if hasattr(user, "follower_requests") and request.user in user.follower_requests.all():
+        error = "already_requested"
+
+    data = {
+        "account": account,
+        "user": user,
+        "error": error
+    }
+
+    return TemplateResponse(request, "ostatus/subscribe.html", data)
+
+
+@login_required
+def ostatus_follow_success(request):
+    """display success message for remote follow"""
+    user = get_user_from_username(request.user, request.GET.get("following"))
+    data = {
+        "account": user.name,
+        "user": user, 
+        "error": None
+    }
+    return TemplateResponse(request, "ostatus/success.html", data)
+
+@login_required
+@require_POST
+def remote_follow(request):
+    """complete an incoming remote follow request"""
+
+    # this is triggered from remote follow form
+    # attempt the follow request
+    # on success [[return success page]]
+    # on fail return [[ostatus_error]]
+
+
+"""
+REQUEST TO FOLLOW FROM REMOTE ACCOUNT
+1. click remote follow button [default checked option to open new window]
+2. popup new small window
+3. enter user acct to follow from (user@domain.tld) and submit form 
+5. GET {base_url}/.well-known/webfinger/?resource=acct:{user@domain.tld}
+6. parse json for links 
+6.1 rel="http://ostatus.org/schema/1.0/subscribe" and return 'template'
+6.2 rel="self" and return href
+7. replace '{uri}' in the returned string with self.href
+8. GET the URI at 6.1
+
+REQUEST TO FOLLOW FROM LOCAL ACCOUNT
+1. receive request to /ostatus_subscribe?acct={uri}
+2. check user is logged in and present confirmation screen (remote_follow_request)
+3. On confirmation, 3. parse user into info needed for a normal follow
+4. send follow request, on 200 response display success else display error (remote_follow)
+5. Include button inviting to close window
+"""