clacks/lib/clacks_web/controllers/actor_controller.ex

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defmodule ClacksWeb.ActorController do
use ClacksWeb, :controller
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alias Clacks.Actor
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@context "https://www.w3.org/ns/activitystreams"
plug :get_actor
defp get_actor(%Plug.Conn{path_params: %{"nickname" => nickname}} = conn, _opts) do
case Actor.get_by_nickname(nickname) do
nil ->
conn
|> put_status(404)
|> halt()
actor ->
assign(conn, :actor, actor)
end
end
defp get_actor(conn, _opts), do: conn
def get(conn, _params) do
case conn.assigns[:actor] do
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%Actor{local: true, data: data} ->
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(data)
%Actor{local: false, ap_id: ap_id} ->
conn
|> redirect(external: ap_id)
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end
end
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def followers(conn, %{"page" => page}) do
{page, _} = Integer.parse(page)
followers = conn.assigns[:actor].followers
data =
collection_page(conn, followers, page)
|> Map.put("@context", @context)
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(data)
end
def followers(conn, _params) do
%Actor{followers: followers} = conn.assigns[:actor]
data = %{
"@context" => @context,
"type" => "OrderedCollection",
"id" => current_url(conn, %{}),
"totalItems" => length(followers),
"first" => collection_page(conn, followers, 1)
}
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(data)
end
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def following(conn, %{"page" => page}) do
actor = conn.assigns[:actor]
following =
Actor.get_all_following(actor)
|> Enum.map(fn actor -> actor.ap_id end)
data =
collection_page(conn, following, page)
|> Map.put("@context", @context)
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(data)
end
def following(conn, _params) do
actor = conn.assigns[:actor]
following =
Actor.get_all_following(actor)
|> Enum.map(fn actor -> actor.ap_id end)
data = %{
"@context" => @context,
"type" => "OrderedCollection",
"id" => current_url(conn, %{}),
"totalItems" => length(following),
"first" => collection_page(conn, following, 1)
}
conn
|> put_resp_header("content-type", "application/activity+json")
|> json(data)
end
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defp collection_page(conn, collection, page) do
chunks = Enum.chunk_every(collection, 20)
# page is 1 indexed, so subtract 1 to get the current chunk
current_chunk = Enum.at(chunks, page - 1)
data = %{
"type" => "OrderedCollectionPage",
"totalItems" => length(collection),
"partOf" => current_url(conn, %{}),
"id" => current_url(conn, %{page: page}),
"orderedItems" => current_chunk || []
}
if page < length(chunks) do
Map.put(data, "next", current_url(conn, %{page: page + 1}))
else
data
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end
end
end