From 49929321c761cf389d42ca52d88dc8ec09a375cc Mon Sep 17 00:00:00 2001
From: Roger Braun <rbraun@Bobble.local>
Date: Wed, 13 Sep 2017 15:55:10 +0200
Subject: [PATCH] Add relationships to masto api.

---
 .../mastodon_api/mastodon_api_controller.ex   |  9 +++++++++
 .../web/mastodon_api/views/account_view.ex    | 17 ++++++++++++++++
 lib/pleroma/web/router.ex                     |  2 ++
 test/web/mastodon_api/account_view_test.exs   | 20 +++++++++++++++++++
 .../mastodon_api_controller_test.exs          | 17 ++++++++++++++++
 5 files changed, 65 insertions(+)

diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 219d860a9..69b559a09 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.TwitterAPI.TwitterAPI
   alias Pleroma.Web.CommonAPI
+  import Ecto.Query
   import Logger
 
   def create_app(conn, params) do
@@ -177,6 +178,14 @@ def notifications(%{assigns: %{user: user}} = conn, params) do
     |> json(result)
   end
 
+  def relationships(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+    id = List.wrap(id)
+    q = from u in User,
+      where: u.id in ^id
+    targets = Repo.all(q)
+    render conn, AccountView, "relationships.json", %{user: user, targets: targets}
+  end
+
   def empty_array(conn, _) do
     Logger.debug("Unimplemented, returning an empty array")
     json(conn, [])
diff --git a/lib/pleroma/web/mastodon_api/views/account_view.ex b/lib/pleroma/web/mastodon_api/views/account_view.ex
index 85cce754a..4e9ee4132 100644
--- a/lib/pleroma/web/mastodon_api/views/account_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/account_view.ex
@@ -1,6 +1,7 @@
 defmodule Pleroma.Web.MastodonAPI.AccountView do
   use Pleroma.Web, :view
   alias Pleroma.User
+  alias Pleroma.Web.MastodonAPI.AccountView
 
   defp image_url(%{"url" => [ %{ "href" => href } | t ]}), do: href
   defp image_url(_), do: nil
@@ -38,4 +39,20 @@ def render("mention.json", %{user: user}) do
       url: user.ap_id
     }
   end
+
+  def render("relationship.json", %{user: user, target: target}) do
+    %{
+      id: target.id,
+      following: User.following?(target, user),
+      followed_by: User.following?(user, target),
+      blocking: false,
+      muting: false,
+      requested: false,
+      domain_blocking: false
+    }
+  end
+
+  def render("relationships.json", %{user: user, targets: targets}) do
+    render_many(targets, AccountView, "relationship.json", user: user, as: :target)
+  end
 end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 161635558..883fd56f4 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -56,6 +56,8 @@ def user_fetcher(username) do
     pipe_through :authenticated_api
 
     get "/accounts/verify_credentials", MastodonAPIController, :verify_credentials
+    get "/accounts/relationships", MastodonAPIController, :relationships
+
     get "/timelines/home", MastodonAPIController, :home_timeline
 
     post "/statuses", MastodonAPIController, :post_status
diff --git a/test/web/mastodon_api/account_view_test.exs b/test/web/mastodon_api/account_view_test.exs
index 0106fbcc0..259258281 100644
--- a/test/web/mastodon_api/account_view_test.exs
+++ b/test/web/mastodon_api/account_view_test.exs
@@ -2,6 +2,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountViewTest do
   use Pleroma.DataCase
   import Pleroma.Factory
   alias Pleroma.Web.MastodonAPI.AccountView
+  alias Pleroma.User
 
   test "Represent a user account" do
     user = insert(:user, %{info: %{"note_count" => 5, "follower_count" => 3}, nickname: "shp@shitposter.club"})
@@ -39,4 +40,23 @@ test "Represent a smaller mention" do
 
     assert expected == AccountView.render("mention.json", %{user: user})
   end
+
+  test "represent a relationship" do
+    user = insert(:user)
+    other_user = insert(:user)
+
+    {:ok, user} = User.follow(user, other_user)
+
+    expected = %{
+      id: other_user.id,
+      following: false,
+      followed_by: true,
+      blocking: false,
+      muting: false,
+      requested: false,
+      domain_blocking: false
+    }
+
+    assert expected == AccountView.render("relationship.json", %{user: user, target: other_user})
+  end
 end
diff --git a/test/web/mastodon_api/mastodon_api_controller_test.exs b/test/web/mastodon_api/mastodon_api_controller_test.exs
index e87430d3f..52415bb50 100644
--- a/test/web/mastodon_api/mastodon_api_controller_test.exs
+++ b/test/web/mastodon_api/mastodon_api_controller_test.exs
@@ -181,4 +181,21 @@ test "gets a users statuses", %{conn: conn} do
       assert id == note_two.id
     end
   end
+
+  describe "user relationships" do
+    test "returns the relationships for the current user", %{conn: conn} do
+      user = insert(:user)
+      other_user = insert(:user)
+
+      {:ok, user} = User.follow(user, other_user)
+
+      conn = conn
+      |> assign(:user, user)
+      |> get("/api/v1/accounts/relationships", %{"id" => [other_user.id]})
+
+      assert [relationship] = json_response(conn, 200)
+
+      assert other_user.id == relationship["id"]
+    end
+  end
 end