Stop exposing if a user blocks you over the API.

lib/pleroma/web/api_spec/operations/account_operation.ex

@@ -767,7 +767,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
           "showing_reblogs" => true,
           "followed_by" => true,
           "blocking" => false,
-          "blocked_by" => true,
+          "blocked_by" => false,
           "muting" => false,
           "muting_notifications" => false,
           "note" => "",
@@ -783,7 +783,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
           "showing_reblogs" => true,
           "followed_by" => true,
           "blocking" => false,
-          "blocked_by" => true,
+          "blocked_by" => false,
           "muting" => true,
           "muting_notifications" => false,
           "note" => "",

lib/pleroma/web/api_spec/schemas/account_relationship.ex

@@ -13,7 +13,10 @@ defmodule Pleroma.Web.ApiSpec.Schemas.AccountRelationship do
     description: "Relationship between current account and requested account",
     type: :object,
     properties: %{
-      blocked_by: %Schema{type: :boolean},
+      blocked_by: %Schema{
+        type: :boolean,
+        description: "Represents being blocked by this user. Always false."
+      },
       blocking: %Schema{type: :boolean},
       domain_blocking: %Schema{type: :boolean},
       endorsed: %Schema{type: :boolean},

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -124,14 +124,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
           target,
           &User.blocks_user?(&1, &2)
         ),
-      blocked_by:
-        UserRelationship.exists?(
-          user_relationships,
-          :block,
-          target,
-          reading_user,
-          &User.blocks_user?(&1, &2)
-        ),
+      blocked_by: false,
       muting:
         UserRelationship.exists?(
           user_relationships,

test/pleroma/web/mastodon_api/views/account_view_test.exs

@@ -397,7 +397,22 @@ defmodule Pleroma.Web.MastodonAPI.AccountViewTest do
       expected =
         Map.merge(
           @blank_response,
-          %{following: false, blocking: true, blocked_by: true, id: to_string(other_user.id)}
+          %{following: false, blocking: true, blocked_by: false, id: to_string(other_user.id)}
+        )
+
+      test_relationship_rendering(user, other_user, expected)
+    end
+
+    test "blocks are not visible to the blocked user" do
+      user = insert(:user)
+      other_user = insert(:user)
+
+      {:ok, _user_relationship} = User.block(other_user, user)
+
+      expected =
+        Map.merge(
+          @blank_response,
+          %{following: false, blocking: false, blocked_by: false, id: to_string(other_user.id)}
         )
 
       test_relationship_rendering(user, other_user, expected)