From 5af1bf443dfd21a6b0be9efc1f55a73e590f6ba3 Mon Sep 17 00:00:00 2001
From: Sergey Suprunenko <suprunenko.s@gmail.com>
Date: Fri, 22 Nov 2019 19:52:50 +0100
Subject: [PATCH] Skip notifications for statuses that contain an irreversible
 filtered word

---
 lib/pleroma/notification.ex |  36 ++++++++++++-
 test/notification_test.exs  | 101 ++++++++++++++++++++++++++++++------
 2 files changed, 119 insertions(+), 18 deletions(-)

diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index 2ef1a80c5..3f749cace 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -130,6 +130,7 @@ def for_user_query(user, opts \\ %{}) do
     |> preload([n, a, o], activity: {a, object: o})
     |> exclude_notification_muted(user, exclude_notification_muted_opts)
     |> exclude_blocked(user, exclude_blocked_opts)
+    |> exclude_filtered(user)
     |> exclude_visibility(opts)
   end
 
@@ -158,6 +159,20 @@ defp exclude_notification_muted(query, user, opts) do
     |> where([n, a, o, tm], is_nil(tm.user_id))
   end
 
+  defp exclude_filtered(query, user) do
+    case Pleroma.Filter.compose_regex(user) do
+      nil ->
+        query
+
+      regex ->
+        from([_n, a, o] in query,
+          where:
+            fragment("not(?->>'content' ~* ?)", o.data, ^regex) or
+              fragment("?->>'actor' = ?", o.data, ^user.ap_id)
+        )
+    end
+  end
+
   @valid_visibilities ~w[direct unlisted public private]
 
   defp exclude_visibility(query, %{exclude_visibilities: visibility})
@@ -555,7 +570,8 @@ def skip?(%Activity{} = activity, %User{} = user) do
       :follows,
       :non_followers,
       :non_follows,
-      :recently_followed
+      :recently_followed,
+      :filtered
     ]
     |> Enum.find(&skip?(&1, activity, user))
   end
@@ -624,6 +640,24 @@ def skip?(:recently_followed, %Activity{data: %{"type" => "Follow"}} = activity,
     end)
   end
 
+  def skip?(:filtered, activity, user) do
+    object = Object.normalize(activity)
+
+    cond do
+      is_nil(object) ->
+        false
+
+      object.data["actor"] == user.ap_id ->
+        false
+
+      not is_nil(regex = Pleroma.Filter.compose_regex(user, :re)) ->
+        Regex.match?(regex, object.data["content"])
+
+      true ->
+        false
+    end
+  end
+
   def skip?(_, _, _), do: false
 
   def for_user_and_activity(user, activity) do
diff --git a/test/notification_test.exs b/test/notification_test.exs
index 6add3f7eb..9ac6925c3 100644
--- a/test/notification_test.exs
+++ b/test/notification_test.exs
@@ -324,6 +324,44 @@ test "it disables notifications from people who are invisible" do
       {:ok, status} = CommonAPI.post(author, %{status: "hey @#{user.nickname}"})
       refute Notification.create_notification(status, user)
     end
+
+    test "it doesn't create notifications if content matches with an irreversible filter" do
+      user = insert(:user)
+      subscriber = insert(:user)
+
+      User.subscribe(subscriber, user)
+      insert(:filter, user: subscriber, phrase: "cofe", hide: true)
+
+      {:ok, status} = CommonAPI.post(user, %{"status" => "got cofe?"})
+
+      assert {:ok, [nil]} == Notification.create_notifications(status)
+    end
+
+    test "it creates notifications if content matches with a not irreversible filter" do
+      user = insert(:user)
+      subscriber = insert(:user)
+
+      User.subscribe(subscriber, user)
+      insert(:filter, user: subscriber, phrase: "cofe", hide: false)
+
+      {:ok, status} = CommonAPI.post(user, %{"status" => "got cofe?"})
+      {:ok, [notification]} = Notification.create_notifications(status)
+
+      assert notification
+    end
+
+    test "it creates notifications when someone likes user's status with a filtered word" do
+      user = insert(:user)
+      other_user = insert(:user)
+      insert(:filter, user: user, phrase: "tesla", hide: true)
+
+      {:ok, activity_one} = CommonAPI.post(user, %{"status" => "wow tesla"})
+      {:ok, activity_two, _} = CommonAPI.favorite(activity_one.id, other_user)
+
+      {:ok, [notification]} = Notification.create_notifications(activity_two)
+
+      assert notification
+    end
   end
 
   describe "follow / follow_request notifications" do
@@ -990,8 +1028,13 @@ test "move activity generates a notification" do
   end
 
   describe "for_user" do
-    test "it returns notifications for muted user without notifications" do
+    setup do
       user = insert(:user)
+
+      {:ok, %{user: user}}
+    end
+
+    test "it returns notifications for muted user without notifications", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted, false)
 
@@ -1002,8 +1045,7 @@ test "it returns notifications for muted user without notifications" do
       assert notification.activity.object
     end
 
-    test "it doesn't return notifications for muted user with notifications" do
-      user = insert(:user)
+    test "it doesn't return notifications for muted user with notifications", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted)
 
@@ -1012,8 +1054,7 @@ test "it doesn't return notifications for muted user with notifications" do
       assert Notification.for_user(user) == []
     end
 
-    test "it doesn't return notifications for blocked user" do
-      user = insert(:user)
+    test "it doesn't return notifications for blocked user", %{user: user} do
       blocked = insert(:user)
       {:ok, _user_relationship} = User.block(user, blocked)
 
@@ -1022,8 +1063,7 @@ test "it doesn't return notifications for blocked user" do
       assert Notification.for_user(user) == []
     end
 
-    test "it doesn't return notifications for domain-blocked non-followed user" do
-      user = insert(:user)
+    test "it doesn't return notifications for domain-blocked non-followed user", %{user: user} do
       blocked = insert(:user, ap_id: "http://some-domain.com")
       {:ok, user} = User.block_domain(user, "some-domain.com")
 
@@ -1044,8 +1084,7 @@ test "it returns notifications for domain-blocked but followed user" do
       assert length(Notification.for_user(user)) == 1
     end
 
-    test "it doesn't return notifications for muted thread" do
-      user = insert(:user)
+    test "it doesn't return notifications for muted thread", %{user: user} do
       another_user = insert(:user)
 
       {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})
@@ -1054,8 +1093,7 @@ test "it doesn't return notifications for muted thread" do
       assert Notification.for_user(user) == []
     end
 
-    test "it returns notifications from a muted user when with_muted is set" do
-      user = insert(:user)
+    test "it returns notifications from a muted user when with_muted is set", %{user: user} do
       muted = insert(:user)
       {:ok, _user_relationships} = User.mute(user, muted)
 
@@ -1064,8 +1102,9 @@ test "it returns notifications from a muted user when with_muted is set" do
       assert length(Notification.for_user(user, %{with_muted: true})) == 1
     end
 
-    test "it doesn't return notifications from a blocked user when with_muted is set" do
-      user = insert(:user)
+    test "it doesn't return notifications from a blocked user when with_muted is set", %{
+      user: user
+    } do
       blocked = insert(:user)
       {:ok, _user_relationship} = User.block(user, blocked)
 
@@ -1075,8 +1114,8 @@ test "it doesn't return notifications from a blocked user when with_muted is set
     end
 
     test "when with_muted is set, " <>
-           "it doesn't return notifications from a domain-blocked non-followed user" do
-      user = insert(:user)
+           "it doesn't return notifications from a domain-blocked non-followed user",
+         %{user: user} do
       blocked = insert(:user, ap_id: "http://some-domain.com")
       {:ok, user} = User.block_domain(user, "some-domain.com")
 
@@ -1085,8 +1124,7 @@ test "when with_muted is set, " <>
       assert Enum.empty?(Notification.for_user(user, %{with_muted: true}))
     end
 
-    test "it returns notifications from muted threads when with_muted is set" do
-      user = insert(:user)
+    test "it returns notifications from muted threads when with_muted is set", %{user: user} do
       another_user = insert(:user)
 
       {:ok, activity} = CommonAPI.post(another_user, %{status: "hey @#{user.nickname}"})
@@ -1094,5 +1132,34 @@ test "it returns notifications from muted threads when with_muted is set" do
       {:ok, _} = Pleroma.ThreadMute.add_mute(user.id, activity.data["context"])
       assert length(Notification.for_user(user, %{with_muted: true})) == 1
     end
+
+    test "it doesn't return notifications about mentiones with filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "cofe", hide: true)
+      another_user = insert(:user)
+
+      {:ok, _activity} =
+        CommonAPI.post(another_user, %{"status" => "@#{user.nickname} got cofe?"})
+
+      assert Enum.empty?(Notification.for_user(user))
+    end
+
+    test "it returns notifications about mentiones with not hidden filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "test", hide: false)
+      another_user = insert(:user)
+
+      {:ok, _activity} = CommonAPI.post(another_user, %{"status" => "@#{user.nickname} test"})
+
+      assert length(Notification.for_user(user)) == 1
+    end
+
+    test "it returns notifications about favorites with filtered word", %{user: user} do
+      insert(:filter, user: user, phrase: "cofe", hide: true)
+      another_user = insert(:user)
+
+      {:ok, activity} = CommonAPI.post(user, %{"status" => "Give me my cofe!"})
+      {:ok, _, _} = CommonAPI.favorite(activity.id, another_user)
+
+      assert length(Notification.for_user(user)) == 1
+    end
   end
 end