243 lines
		
	
	
	
		
			10 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
			
		
		
	
	
			243 lines
		
	
	
	
		
			10 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
defmodule Pleroma.Web.OStatus.ActivityRepresenter do
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  alias Pleroma.{Activity, User, Object}
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  alias Pleroma.Web.OStatus.UserRepresenter
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  alias Pleroma.Formatter
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  require Logger
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  defp get_href(id) do
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    with %Object{data: %{ "external_url" => external_url } }<- Object.get_cached_by_ap_id(id) do
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      external_url
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    else
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      _e -> id
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    end
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  end
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  defp get_in_reply_to(%{"object" => %{"inReplyTo" => in_reply_to}}) do
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    [{:"thr:in-reply-to", [ref: to_charlist(in_reply_to), href: to_charlist(get_href(in_reply_to))], []}]
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  end
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  defp get_in_reply_to(_), do: []
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  defp get_mentions(to) do
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    Enum.map(to, fn (id) ->
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      cond do
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        # Special handling for the AP/Ostatus public collections
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        "https://www.w3.org/ns/activitystreams#Public" == id ->
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          {:link, [rel: "mentioned", "ostatus:object-type": "http://activitystrea.ms/schema/1.0/collection", href: "http://activityschema.org/collection/public"], []}
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        # Ostatus doesn't handle follower collections, ignore these.
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        Regex.match?(~r/^#{Pleroma.Web.base_url}.+followers$/, id) ->
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          []
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        true ->
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          {:link, [rel: "mentioned", "ostatus:object-type": "http://activitystrea.ms/schema/1.0/person", href: id], []}
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      end
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    end)
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  end
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  defp get_links(%{local: true, data: data}) do
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    h = fn(str) -> [to_charlist(str)] end
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    [
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      {:link, [type: ['application/atom+xml'], href: h.(data["object"]["id"]), rel: 'self'], []},
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      {:link, [type: ['text/html'], href: h.(data["object"]["id"]), rel: 'alternate'], []}
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    ]
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  end
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  defp get_links(%{local: false,
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                   data: %{
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                     "object" => %{
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                       "external_url" => external_url
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                     }
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                   }}) do
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    h = fn(str) -> [to_charlist(str)] end
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    [
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      {:link, [type: ['text/html'], href: h.(external_url), rel: 'alternate'], []}
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    ]
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  end
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  defp get_links(_activity), do: []
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  defp get_emoji_links(content) do
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    Enum.map(Formatter.get_emoji(content), fn({emoji, file}) ->
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      {:link, [name: to_charlist(emoji), rel: 'emoji', href: to_charlist("#{Pleroma.Web.Endpoint.static_url}#{file}")], []}
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    end)
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  end
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  def to_simple_form(activity, user, with_author \\ false)
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  def to_simple_form(%{data: %{"object" => %{"type" => "Note"}}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["object"]["published"]
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    inserted_at = activity.data["object"]["published"]
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    attachments = Enum.map(activity.data["object"]["attachment"] || [], fn(attachment) ->
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      url = hd(attachment["url"])
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      {:link, [rel: 'enclosure', href: to_charlist(url["href"]), type: to_charlist(url["mediaType"])], []}
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    end)
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    in_reply_to = get_in_reply_to(activity.data)
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    mentions = activity.data["to"] |> get_mentions
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    categories = (activity.data["object"]["tag"] || [])
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    |> Enum.map(fn (tag) -> {:category, [term: to_charlist(tag)], []} end)
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    emoji_links = get_emoji_links(activity.data["object"]["content"] || "")
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    [
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      {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/note']},
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/post']},
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      {:id, h.(activity.data["object"]["id"])}, # For notes, federate the object id.
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      {:title, ['New note by #{user.nickname}']},
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      {:content, [type: 'html'], h.(activity.data["object"]["content"] |> String.replace(~r/[\n\r]/, ""))},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)},
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      {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])},
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      {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []},
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    ] ++ get_links(activity) ++ categories ++ attachments ++ in_reply_to ++ author ++ mentions ++ emoji_links
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  end
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  def to_simple_form(%{data: %{"type" => "Like"}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["published"]
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    inserted_at = activity.data["published"]
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    in_reply_to = get_in_reply_to(activity.data)
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    mentions = activity.data["to"] |> get_mentions
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    [
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/favorite']},
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      {:id, h.(activity.data["id"])},
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      {:title, ['New favorite by #{user.nickname}']},
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      {:content, [type: 'html'], ['#{user.nickname} favorited something']},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)},
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      {:"activity:object", [
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        {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/note']},
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        {:id, h.(activity.data["object"])}, # For notes, federate the object id.
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      ]},
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      {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])},
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      {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []},
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      {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []},
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      {:"thr:in-reply-to", [ref: to_charlist(activity.data["object"])], []}
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    ] ++ author ++ mentions
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  end
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  def to_simple_form(%{data: %{"type" => "Announce"}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["published"]
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    inserted_at = activity.data["published"]
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    in_reply_to = get_in_reply_to(activity.data)
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    retweeted_activity = Activity.get_create_activity_by_object_ap_id(activity.data["object"])
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    retweeted_user = User.get_cached_by_ap_id(retweeted_activity.data["actor"])
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    retweeted_xml = to_simple_form(retweeted_activity, retweeted_user, true)
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    mentions = activity.data["to"] |> get_mentions
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    [
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      {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']},
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/share']},
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      {:id, h.(activity.data["id"])},
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      {:title, ['#{user.nickname} repeated a notice']},
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      {:content, [type: 'html'], ['RT #{retweeted_activity.data["object"]["content"]}']},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)},
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      {:"ostatus:conversation", [ref: h.(activity.data["context"])], h.(activity.data["context"])},
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      {:link, [ref: h.(activity.data["context"]), rel: 'ostatus:conversation'], []},
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      {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []},
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      {:"activity:object", retweeted_xml}
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    ] ++ mentions ++ author
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  end
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  def to_simple_form(%{data: %{"type" => "Follow"}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["published"]
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    inserted_at = activity.data["published"]
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    mentions = (activity.data["to"] || []) |> get_mentions
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    [
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      {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']},
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/follow']},
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      {:id, h.(activity.data["id"])},
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      {:title, ['#{user.nickname} started following #{activity.data["object"]}']},
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      {:content, [type: 'html'], ['#{user.nickname} started following #{activity.data["object"]}']},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)},
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      {:"activity:object", [
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        {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/person']},
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        {:id, h.(activity.data["object"])},
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        {:uri, h.(activity.data["object"])},
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      ]},
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      {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []},
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    ] ++ mentions ++ author
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  end
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  # Only undos of follow for now. Will need to get redone once there are more
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  def to_simple_form(%{data: %{"type" => "Undo"}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["published"]
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    inserted_at = activity.data["published"]
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    follow_activity = Activity.get_by_ap_id(activity.data["object"])
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    mentions = (activity.data["to"] || []) |> get_mentions
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    [
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      {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']},
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/unfollow']},
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      {:id, h.(activity.data["id"])},
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      {:title, ['#{user.nickname} stopped following #{follow_activity.data["object"]}']},
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      {:content, [type: 'html'], ['#{user.nickname} stopped following #{follow_activity.data["object"]}']},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)},
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      {:"activity:object", [
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        {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/person']},
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        {:id, h.(follow_activity.data["object"])},
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        {:uri, h.(follow_activity.data["object"])},
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      ]},
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      {:link, [rel: 'self', type: ['application/atom+xml'], href: h.(activity.data["id"])], []},
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    ] ++ mentions ++ author
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  end
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  def to_simple_form(%{data: %{"type" => "Delete"}} = activity, user, with_author) do
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    h = fn(str) -> [to_charlist(str)] end
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    updated_at = activity.data["published"]
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    inserted_at = activity.data["published"]
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    author = if with_author, do: [{:author, UserRepresenter.to_simple_form(user)}], else: []
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    [
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      {:"activity:object-type", ['http://activitystrea.ms/schema/1.0/activity']},
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      {:"activity:verb", ['http://activitystrea.ms/schema/1.0/delete']},
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      {:id, h.(activity.data["object"])},
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      {:title, ['An object was deleted']},
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      {:content, [type: 'html'], ['An object was deleted']},
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      {:published, h.(inserted_at)},
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      {:updated, h.(updated_at)}
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    ]  ++ author
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  end
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  def wrap_with_entry(simple_form) do
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    [{
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      :entry, [
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        xmlns: 'http://www.w3.org/2005/Atom',
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        "xmlns:thr": 'http://purl.org/syndication/thread/1.0',
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        "xmlns:activity": 'http://activitystrea.ms/spec/1.0/',
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        "xmlns:poco": 'http://portablecontacts.net/spec/1.0',
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        "xmlns:ostatus": 'http://ostatus.org/schema/1.0'
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      ], simple_form
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    }]
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  end
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  def to_simple_form(_, _, _), do: nil
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end
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