MastoAPI: Profile directory

lib/pleroma/user.ex

@@ -149,6 +149,7 @@ defmodule Pleroma.User do
     field(:disclose_client, :boolean, default: true)
     field(:pinned_objects, :map, default: %{})
     field(:is_suggested, :boolean, default: false)
+    field(:last_status_at, :naive_datetime)
 
     embeds_one(
       :notification_settings,
@@ -2499,4 +2500,16 @@ defmodule Pleroma.User do
     |> where([u], u.local == true)
     |> Repo.aggregate(:count)
   end
+
+  def update_last_status_at(user) do
+    User
+    |> where(id: ^user.id)
+    |> update([u], set: [last_status_at: fragment("NOW()")])
+    |> select([u], u)
+    |> Repo.update_all([])
+    |> case do
+      {1, [user]} -> set_cache(user)
+      _ -> {:error, user}
+    end
+  end
 end

lib/pleroma/user/query.ex

@@ -47,6 +47,7 @@ defmodule Pleroma.User.Query do
             is_admin: boolean(),
             is_moderator: boolean(),
             is_suggested: boolean(),
+            is_discoverable: boolean(),
             super_users: boolean(),
             invisible: boolean(),
             internal: boolean(),
@@ -172,6 +173,10 @@ defmodule Pleroma.User.Query do
     where(query, [u], u.is_suggested == ^bool)
   end
 
+  defp compose_query({:is_discoverable, bool}, query) do
+    where(query, [u], u.is_discoverable == ^bool)
+  end
+
   defp compose_query({:followers, %User{id: id}}, query) do
     query
     |> where([u], u.id != ^id)

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -81,6 +81,10 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     if is_public?(object), do: User.decrease_note_count(actor), else: {:ok, actor}
   end
 
+  def update_last_status_at_if_public(actor, object) do
+    if is_public?(object), do: User.update_last_status_at(actor), else: {:ok, actor}
+  end
+
   defp increase_replies_count_if_reply(%{
          "object" => %{"inReplyTo" => reply_ap_id} = object,
          "type" => "Create"
@@ -288,6 +292,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
          _ <- increase_replies_count_if_reply(create_data),
          {:quick_insert, false, activity} <- {:quick_insert, quick_insert?, activity},
          {:ok, _actor} <- increase_note_count_if_public(actor, activity),
+         {:ok, _actor} <- update_last_status_at_if_public(actor, activity),
          _ <- notify_and_stream(activity),
          :ok <- maybe_schedule_poll_notifications(activity),
          :ok <- maybe_federate(activity) do

lib/pleroma/web/activity_pub/side_effects.ex

@@ -199,6 +199,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
          %User{} = user <- User.get_cached_by_ap_id(activity.data["actor"]) do
       {:ok, notifications} = Notification.create_notifications(activity, do_send: false)
       {:ok, _user} = ActivityPub.increase_note_count_if_public(user, object)
+      {:ok, _user} = ActivityPub.update_last_status_at_if_public(user, object)
 
       if in_reply_to = object.data["type"] != "Answer" && object.data["inReplyTo"] do
         Object.increase_replies_count(in_reply_to)

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

@@ -0,0 +1,41 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.DirectoryOperation do
+  alias OpenApiSpex.Operation
+  alias Pleroma.Web.ApiSpec.AccountOperation
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+  alias Pleroma.Web.ApiSpec.Schemas.BooleanLike
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Directory"],
+      summary: "Profile directory",
+      operationId: "DirectoryController.index",
+      parameters:
+        [
+          Operation.parameter(
+            :order,
+            :query,
+            :string,
+            "Order by recent activity or account creation",
+            required: nil
+          ),
+          Operation.parameter(:local, :query, BooleanLike, "Include local users only")
+        ] ++ pagination_params(),
+      responses: %{
+        200 =>
+          Operation.response("Accounts", "application/json", AccountOperation.array_of_accounts()),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+end

lib/pleroma/web/mastodon_api/controllers/directory_controller.ex

@@ -0,0 +1,82 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.DirectoryController do
+  use Pleroma.Web, :controller
+
+  import Ecto.Query
+  alias Pleroma.Pagination
+  alias Pleroma.User
+  alias Pleroma.UserRelationship
+  alias Pleroma.Web.MastodonAPI.AccountView
+
+  require Logger
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  plug(:skip_auth when action == "index")
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.DirectoryOperation
+
+  @doc "GET /api/v1/directory"
+  def index(%{assigns: %{user: user}} = conn, params) do
+    with true <- Pleroma.Config.get([:instance, :profile_directory]) do
+      limit = Map.get(params, :limit, 20) |> min(80)
+
+      users =
+        User.Query.build(%{is_discoverable: true, invisible: false, limit: limit})
+        |> order_by_creation_date(params)
+        |> exclude_remote(params)
+        |> exclude_user(user)
+        |> exclude_relationships(user, [:block, :mute])
+        |> Pagination.fetch_paginated(params, :offset)
+
+      conn
+      |> put_view(AccountView)
+      |> render("index.json", for: user, users: users, as: :user)
+    else
+      _ -> json(conn, [])
+    end
+  end
+
+  defp order_by_creation_date(query, %{order: "new"}) do
+    query
+  end
+
+  defp order_by_creation_date(query, _params) do
+    query
+    |> order_by([u], desc_nulls_last: u.last_status_at)
+  end
+
+  defp exclude_remote(query, %{local: true}) do
+    where(query, [u], u.local == true)
+  end
+
+  defp exclude_remote(query, _params) do
+    query
+  end
+
+  defp exclude_user(query, %User{id: user_id}) do
+    where(query, [u], u.id != ^user_id)
+  end
+
+  defp exclude_user(query, _user) do
+    query
+  end
+
+  defp exclude_relationships(query, %User{id: user_id}, relationship_types) do
+    query
+    |> join(:left, [u], r in UserRelationship,
+      as: :user_relationships,
+      on:
+        r.target_id == u.id and r.source_id == ^user_id and
+          r.relationship_type in ^relationship_types
+    )
+    |> where([user_relationships: r], is_nil(r.target_id))
+  end
+
+  defp exclude_relationships(query, _user, _relationship_types) do
+    query
+  end
+end

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

@@ -270,6 +270,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
           actor_type: user.actor_type
         }
       },
+      last_status_at: user.last_status_at,
 
       # Pleroma extensions
       # Note: it's insecure to output :email but fully-qualified nickname may serve as safe stub

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

@@ -87,6 +87,9 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       "pleroma_chat_messages",
       if Config.get([:instance, :show_reactions]) do
         "exposable_reactions"
+      end,
+      if Config.get([:instance, :profile_directory]) do
+        "profile_directory"
       end
     ]
     |> Enum.filter(& &1)

lib/pleroma/web/router.ex

@@ -600,6 +600,8 @@ defmodule Pleroma.Web.Router do
     get("/timelines/tag/:tag", TimelineController, :hashtag)
 
     get("/polls/:id", PollController, :show)
+
+    get("/directory", DirectoryController, :index)
   end
 
   scope "/api/v2", Pleroma.Web.MastodonAPI do