Parse mentions, save them, output them in TwAPI.

lib/pleroma/web/twitter_api/representers/activity_representer.ex

@@ -6,6 +6,14 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter do
   def to_map(%Activity{} = activity, %{user: user} = opts) do
     content = get_in(activity.data, ["object", "content"])
     published = get_in(activity.data, ["object", "published"])
+
+    mentions = opts[:mentioned] || []
+
+    attentions = activity.data["to"]
+    |> Enum.map(fn (ap_id) -> Enum.find(mentions, fn(user) -> ap_id == user.ap_id end) end)
+    |> Enum.filter(&(&1))
+    |> Enum.map(fn (user) -> UserRepresenter.to_map(user, opts) end)
+
     %{
       "id" => activity.id,
       "user" => UserRepresenter.to_map(user, opts),
@@ -17,7 +25,8 @@ def to_map(%Activity{} = activity, %{user: user} = opts) do
       "created_at" => published,
       "in_reply_to_status_id" => activity.data["object"]["inReplyToStatusId"],
       "statusnet_conversation_id" => activity.data["object"]["statusnetConversationId"],
-      "attachments" => (activity.data["object"]["attachment"] || []) |> ObjectRepresenter.enum_to_list(opts)
+      "attachments" => (activity.data["object"]["attachment"] || []) |> ObjectRepresenter.enum_to_list(opts),
+      "attentions" => attentions
     }
   end
 end

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -13,16 +13,28 @@ def create_status(user = %User{}, data = %{}) do
     end)
 
     context = ActivityPub.generate_context_id
-    activity = %{
-      "type" => "Create",
-      "to" => [
+
+    content = HtmlSanitizeEx.strip_tags(data["status"])
+
+    mentions = parse_mentions(content)
+
+    default_to = [
       User.ap_followers(user),
       "https://www.w3.org/ns/activitystreams#Public"
-      ],
-      "actor" => User.ap_id(user),
+    ]
+
+    to = default_to ++ Enum.map(mentions, fn ({_, %{ap_id: ap_id}}) -> ap_id end)
+
+    content_html = add_user_links(content, mentions)
+
+    activity = %{
+      "type" => "Create",
+      "to" => to,
+      "actor" => user.ap_id,
       "object" => %{
         "type" => "Note",
-        "content" => data["status"],
+        "to" => to,
+        "content" => content_html,
         "published" => date,
         "context" => context,
         "attachment" => attachments
@@ -36,7 +48,11 @@ def create_status(user = %User{}, data = %{}) do
                     inReplyTo <- Repo.get(Activity, inReplyToId),
                     context <- inReplyTo.data["context"]
                do
+
+               to = activity["to"] ++ [inReplyTo.data["actor"]]
+
                activity
+               |> put_in(["to"], to)
                |> put_in(["context"], context)
                |> put_in(["object", "context"], context)
                |> put_in(["object", "inReplyTo"], inReplyTo.data["object"]["id"])
@@ -122,6 +138,21 @@ def upload(%Plug.Upload{} = file) do
     """
   end
 
+  def parse_mentions(text) do
+    # Modified from https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
+    regex = ~r/@[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@?[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*/
+
+    Regex.scan(regex, text)
+    |> List.flatten
+    |> Enum.uniq
+    |> Enum.map(fn ("@" <> match = full_match) -> {full_match, Repo.get_by(User, nickname: match)} end)
+    |> Enum.filter(fn ({_match, user}) -> user end)
+  end
+
+  def add_user_links(text, mentions) do
+    Enum.reduce(mentions, text, fn ({match, %User{ap_id: ap_id}}, text) -> String.replace(text, match, "<a href='#{ap_id}'>#{match}</a>") end)
+  end
+
   defp add_conversation_id(activity) do
     if is_integer(activity.data["statusnetConversationId"]) do
       {:ok, activity}
@@ -144,6 +175,7 @@ defp activities_to_statuses(activities, opts) do
   defp activity_to_status(activity, opts) do
     actor = get_in(activity.data, ["actor"])
     user = Repo.get_by!(User, ap_id: actor)
-    ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user}))
+    mentioned_users = Repo.all(from user in User, where: user.ap_id in ^activity.data["to"])
+    ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user, mentioned: mentioned_users}))
   end
 end

test/web/twitter_api/representers/activity_representer_test.exs

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenterTest do
 
   test "an activity" do
     {:ok, user} = UserBuilder.insert
+    {:ok, mentioned_user } = UserBuilder.insert(%{nickname: "shp", ap_id: "shp"})
     {:ok, follower} = UserBuilder.insert(%{following: [User.ap_followers(user)]})
 
     object = %Object{
@@ -22,7 +23,7 @@ test "an activity" do
       }
     }
 
-    content = "Some content"
+    content = "Some content mentioning @shp"
     date = DateTime.utc_now() |> DateTime.to_iso8601
 
     activity = %Activity{
@@ -31,7 +32,8 @@ test "an activity" do
         "type" => "Create",
         "to" => [
           User.ap_followers(user),
-          "https://www.w3.org/ns/activitystreams#Public"
+          "https://www.w3.org/ns/activitystreams#Public",
+          mentioned_user.ap_id
         ],
         "actor" => User.ap_id(user),
         "object" => %{
@@ -62,9 +64,12 @@ test "an activity" do
       "statusnet_conversation_id" => 4711,
       "attachments" => [
         ObjectRepresenter.to_map(object)
+      ],
+      "attentions" => [
+        UserRepresenter.to_map(mentioned_user, %{for: follower})
       ]
     }
 
-    assert ActivityRepresenter.to_map(activity, %{user: user, for: follower}) == expected_status
+    assert ActivityRepresenter.to_map(activity, %{user: user, for: follower, mentioned: [mentioned_user]}) == expected_status
   end
 end

test/web/twitter_api/twitter_api_test.exs

@@ -6,7 +6,9 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPITest do
   alias Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter
 
   test "create a status" do
-    user = UserBuilder.build
+    user = UserBuilder.build(%{ap_id: "142344"})
+    _mentioned_user = UserBuilder.insert(%{nickname: "shp", ap_id: "shp"})
+
     object_data = %{
       "type" => "Image",
       "url" => [
@@ -22,17 +24,18 @@ test "create a status" do
     object = Repo.insert!(%Object{data: object_data})
 
     input = %{
-      "status" => "Hello again.",
+      "status" => "Hello again, @shp.<script></script>",
       "media_ids" => [object.id]
     }
 
     { :ok, activity = %Activity{} } = TwitterAPI.create_status(user, input)
 
-    assert get_in(activity.data, ["object", "content"]) == "Hello again."
+    assert get_in(activity.data, ["object", "content"]) == "Hello again, <a href='shp'>@shp</a>."
     assert get_in(activity.data, ["object", "type"]) == "Note"
-    assert get_in(activity.data, ["actor"]) == User.ap_id(user)
+    assert get_in(activity.data, ["actor"]) == user.ap_id
     assert Enum.member?(get_in(activity.data, ["to"]), User.ap_followers(user))
     assert Enum.member?(get_in(activity.data, ["to"]), "https://www.w3.org/ns/activitystreams#Public")
+    assert Enum.member?(get_in(activity.data, ["to"]), "shp")
 
     # Add a context + 'statusnet_conversation_id'
     assert is_binary(get_in(activity.data, ["context"]))
@@ -44,7 +47,7 @@ test "create a status" do
   end
 
   test "create a status that is a reply" do
-    user = UserBuilder.build
+    user = UserBuilder.build(%{ap_id: "some_cool_id"})
     input = %{
       "status" => "Hello again."
     }
@@ -64,6 +67,7 @@ test "create a status that is a reply" do
     assert get_in(reply.data, ["object", "statusnetConversationId"]) == get_in(activity.data, ["object", "statusnetConversationId"])
     assert get_in(reply.data, ["object", "inReplyTo"]) == get_in(activity.data, ["object", "id"])
     assert get_in(reply.data, ["object", "inReplyToStatusId"]) == activity.id
+    assert Enum.member?(get_in(reply.data, ["to"]), "some_cool_id")
   end
 
   test "fetch public statuses" do
@@ -141,4 +145,30 @@ test "upload a file" do
 
     assert is_binary(response)
   end
+
+  test "it can parse mentions and return the relevant users" do
+    text = "@gsimg According to @archaeme , that is @daggsy."
+
+    {:ok, gsimg} = UserBuilder.insert(%{nickname: "gsimg"})
+    {:ok, archaeme} = UserBuilder.insert(%{nickname: "archaeme"})
+
+    expected_result = [
+      {"@gsimg", gsimg},
+      {"@archaeme", archaeme}
+    ]
+
+    assert TwitterAPI.parse_mentions(text) == expected_result
+  end
+
+  test "it adds user links to an existing text" do
+    text = "@gsimg According to @archaeme , that is @daggsy."
+
+    {:ok, _gsimg} = UserBuilder.insert(%{nickname: "gsimg", ap_id: "first_link" })
+    {:ok, _archaeme} = UserBuilder.insert(%{nickname: "archaeme", ap_id: "second_link"})
+
+    mentions = TwitterAPI.parse_mentions(text)
+    expected_text = "<a href='first_link'>@gsimg</a> According to <a href='second_link'>@archaeme</a> , that is @daggsy."
+
+    assert TwitterAPI.add_user_links(text, mentions) == expected_text
+  end
 end