Add status destroy authorization to policy (#3453)

* Add status destroy authorization to policy

* Create explicit unreblog status authorization

spec/services/process_interaction_service_spec.rb

@@ -7,6 +7,35 @@ RSpec.describe ProcessInteractionService do
 
   subject { ProcessInteractionService.new }
 
+  describe 'status delete slap' do
+    let(:remote_status) { Fabricate(:status, account: remote_sender) }
+    let(:envelope) { OStatus2::Salmon.new.pack(payload, sender.keypair) }
+    let(:payload) {
+      <<~XML
+        <entry xmlns="http://www.w3.org/2005/Atom" xmlns:activity="http://activitystrea.ms/spec/1.0/">
+          <author>
+            <email>carol@localdomain.com</email>
+            <name>carol</name>
+            <uri>https://webdomain.com/users/carol</uri>
+          </author>
+
+          <id>#{remote_status.id}</id>
+          <activity:verb>http://activitystrea.ms/schema/1.0/delete</activity:verb>
+        </entry>
+      XML
+    }
+
+    before do
+      receiver.update(locked: true)
+      remote_sender.update(private_key: sender.private_key, public_key: remote_sender.public_key)
+    end
+
+    it 'deletes a record' do
+      expect(RemovalWorker).to receive(:perform_async).with(remote_status.id)
+      subject.call(envelope, receiver)
+    end
+  end
+
   describe 'follow request slap' do
     before do
       receiver.update(locked: true)
@@ -60,7 +89,6 @@ XML
     end
   end
 
-
   describe 'follow request authorization slap' do
     before do
       receiver.update(locked: true)