Merge branch 'features/mastoapi/2.6.0-min_id-pagination' into 'develop'

Features: mastoapi-2.6.0 `min_id` pagination

Closes #351

See merge request pleroma/pleroma!976

3 files changed, 35 insertions, 34 deletions

diff --git a/lib/pleroma/pagination.ex b/lib/pleroma/pagination.ex
index 7c864deef..f435e5c9c 100644
--- a/lib/pleroma/pagination.ex
+++ b/lib/pleroma/pagination.ex
@@ -36,6 +36,12 @@ defmodule Pleroma.Pagination do
       limit: :integer
     }
 
+    params =
+      Enum.reduce(params, %{}, fn
+        {key, _value}, acc when is_atom(key) -> Map.drop(acc, [key])
+        {key, value}, acc -> Map.put(acc, key, value)
+      end)
+
     changeset = cast({%{}, param_types}, params, Map.keys(param_types))
     changeset.changes
   end
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index f217e7bac..c4f8470c8 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Instances
   alias Pleroma.Notification
   alias Pleroma.Object
+  alias Pleroma.Pagination
   alias Pleroma.Repo
   alias Pleroma.Upload
   alias Pleroma.User
@@ -493,7 +494,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
     q
     |> restrict_unlisted()
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 
@@ -636,26 +637,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     )
   end
 
-  defp restrict_limit(query, %{"limit" => limit}) do
-    from(activity in query, limit: ^limit)
-  end
-
-  defp restrict_limit(query, _), do: query
-
   defp restrict_local(query, %{"local_only" => true}) do
     from(activity in query, where: activity.local == true)
   end
 
   defp restrict_local(query, _), do: query
 
-  defp restrict_max(query, %{"max_id" => ""}), do: query
-
-  defp restrict_max(query, %{"max_id" => max_id}) do
-    from(activity in query, where: activity.id < ^max_id)
-  end
-
-  defp restrict_max(query, _), do: query
-
   defp restrict_actor(query, %{"actor_id" => actor_id}) do
     from(activity in query, where: activity.actor == ^actor_id)
   end
@@ -776,12 +763,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   def fetch_activities_query(recipients, opts \\ %{}) do
-    base_query =
-      from(
-        activity in Activity,
-        limit: 20,
-        order_by: [fragment("? desc nulls last", activity.id)]
-      )
+    base_query = from(activity in Activity)
 
     base_query
     |> maybe_preload_objects(opts)
@@ -791,8 +773,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_tag_all(opts)
     |> restrict_since(opts)
     |> restrict_local(opts)
-    |> restrict_limit(opts)
-    |> restrict_max(opts)
     |> restrict_actor(opts)
     |> restrict_type(opts)
     |> restrict_favorited_by(opts)
@@ -808,14 +788,14 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   def fetch_activities(recipients, opts \\ %{}) do
     fetch_activities_query(recipients, opts)
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 
   def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
     fetch_activities_query([], opts)
     |> restrict_to_cc(recipients_to, recipients_cc)
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index f3865b2f2..e0a090659 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -11,6 +11,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   alias Pleroma.Filter
   alias Pleroma.Notification
   alias Pleroma.Object
+  alias Pleroma.Pagination
   alias Pleroma.Repo
   alias Pleroma.ScheduledActivity
   alias Pleroma.Stats
@@ -202,15 +203,29 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   defp add_link_headers(conn, method, activities, param \\ nil, params \\ %{}) do
     params =
       conn.params
-      |> Map.drop(["since_id", "max_id"])
+      |> Map.drop(["since_id", "max_id", "min_id"])
       |> Map.merge(params)
 
     last = List.last(activities)
-    first = List.first(activities)
 
     if last do
-      min = last.id
-      max = first.id
+      max_id = last.id
+
+      limit =
+        params
+        |> Map.get("limit", "20")
+        |> String.to_integer()
+
+      min_id =
+        if length(activities) <= limit do
+          activities
+          |> List.first()
+          |> Map.get(:id)
+        else
+          activities
+          |> Enum.at(limit * -1)
+          |> Map.get(:id)
+        end
 
       {next_url, prev_url} =
         if param do
@@ -219,13 +234,13 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
               Pleroma.Web.Endpoint,
               method,
               param,
-              Map.merge(params, %{max_id: min})
+              Map.merge(params, %{max_id: max_id})
             ),
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
               param,
-              Map.merge(params, %{since_id: max})
+              Map.merge(params, %{min_id: min_id})
             )
           }
         else
@@ -233,12 +248,12 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
-              Map.merge(params, %{max_id: min})
+              Map.merge(params, %{max_id: max_id})
             ),
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
-              Map.merge(params, %{since_id: max})
+              Map.merge(params, %{min_id: min_id})
             )
           }
         end
@@ -314,7 +329,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     activities =
       [user.ap_id]
       |> ActivityPub.fetch_activities_query(params)
-      |> Repo.all()
+      |> Pagination.fetch_paginated(params)
 
     conn
     |> add_link_headers(:dm_timeline, activities)