Add endpoint to subscribe to package activity

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

fedcode/templates/pkg_profile.html

@@ -82,8 +82,12 @@
                   <figure class="image is-64x64 mb-5 mr-5 ml-5 mt-5">
                        <img class="is-rounded" src="{{ follower.person.avatar.url }}" alt="{{ follower.person.user.username }} profile image">
                        <p class="is-size-5 has-text-centered">
-                            <a href="{% url 'user-profile' follower.person.user.username %}">@{{ follower.person.user.username }}</a>
-                       </p>
+                        {% if follower.person.local %}
+                          <a href="{% url 'user-profile' follower.person.user.username %}">@{{ follower.person.user.username }}</a>
+                        {% else %}
+                          <a href="{% url 'user-profile' follower.person.remote_actor.username %}">@{{ follower.person.remote_actor.username }}</a>
+                        {% endif %}
+                        </p>
                   </figure>
           </div>
         {% endfor %}

fedcode/views.py

@@ -10,6 +10,7 @@
 import json
 import logging
 import os.path
+from urllib.parse import urlparse
 
 import requests
 from django.contrib import messages
@@ -59,6 +60,7 @@
 from fedcode.models import Note
 from fedcode.models import Package
 from fedcode.models import Person
+from fedcode.models import RemoteActor
 from fedcode.models import Repository
 from fedcode.models import Reputation
 from fedcode.models import Review
@@ -696,6 +698,24 @@ def post(self, request, *args, **kwargs):
         return HttpResponseBadRequest("Invalid message")
 
 
+@method_decorator(has_valid_header, name="dispatch")
+class RemoteUserSubscribe(View):
+    def get(self, request, *args, **kwargs):
+        """Endpoint to for existing remote user to subscribe to package."""
+        purl = request.GET.get("purl").rstrip("/")
+        package = get_object_or_404(Package, purl=purl)
+        remote_actor = get_object_or_404(RemoteActor, username=kwargs["username"])
+        host = request.get_host()
+        if urlparse(remote_actor.url).netloc == host:
+            _, created = Follow.objects.get_or_create(package=package, person=remote_actor.person)
+            message = f"Already subscribed package {purl}"
+            if created:
+                message = f"Successfully subscribed package {purl}"
+
+            return JsonResponse({"status": "success", "message": message})
+        return HttpResponseBadRequest()
+
+
 @method_decorator(has_valid_header, name="dispatch")
 class PackageInbox(View):
     def get(self, request, *args, **kwargs):
@@ -736,7 +756,7 @@ def get(self, request, *args, **kwargs):
         (or at least the ones you're authorized to see).
         (client-to-server and/or server-to-server)"""
 
-        actor = Package.objects.get(purl=kwargs["purl_string"])
+        actor = get_object_or_404(Package, purl=kwargs["purl_string"])
         return JsonResponse(
             {"notes": ap_collection(actor.notes)},
             content_type=AP_CONTENT_TYPE,

federatedcode/urls.py

@@ -6,8 +6,8 @@
 # See https://github.com/nexB/federatedcode for support or download.
 # See https://aboutcode.org for more information about AboutCode.org OSS projects.
 #
+
 from django.conf import settings
-from django.conf.urls.static import static
 from django.contrib import admin
 from django.urls import include
 from django.urls import path
@@ -28,6 +28,7 @@
 from fedcode.views import PersonSignUp
 from fedcode.views import PersonUpdateView
 from fedcode.views import PersonView
+from fedcode.views import RemoteUserSubscribe
 from fedcode.views import RepositoryListView
 from fedcode.views import ReviewListView
 from fedcode.views import ReviewView
@@ -92,6 +93,11 @@
     path("api/v0/users/@<str:username>/inbox", UserInbox.as_view(), name="user-inbox"),
     path("api/v0/users/@<str:username>/outbox", UserOutbox.as_view(), name="user-outbox"),
     path("api/v0/purls/@<path:purl_string>/inbox", PackageInbox.as_view(), name="purl-inbox"),
+    path(
+        "api/v0/users/@<str:username>/subscribe",
+        RemoteUserSubscribe.as_view(),
+        name="purl-subscribe",
+    ),
     path(
         "api/v0/purls/@<path:purl_string>/outbox",
         PackageOutbox.as_view(),