+ def gather_feed_data(topic, getter \\ &HTTPoison.get/1) do
+ with {:ok, response} <- getter.(topic),
+ status_code when status_code in 200..299 <- response.status_code,
+ body <- response.body,
+ doc <- XML.parse_document(body),
+ uri when not is_nil(uri) <- XML.string_from_xpath("/feed/author[1]/uri", doc),
+ hub when not is_nil(hub) <- XML.string_from_xpath(~S{/feed/link[@rel="hub"]/@href}, doc) do
+
+ name = XML.string_from_xpath("/feed/author[1]/name", doc)
+ preferredUsername = XML.string_from_xpath("/feed/author[1]/poco:preferredUsername", doc)
+ displayName = XML.string_from_xpath("/feed/author[1]/poco:displayName", doc)
+ avatar = OStatus.make_avatar_object(doc)
+
+ {:ok, %{
+ "uri" => uri,
+ "hub" => hub,
+ "nickname" => preferredUsername || name,
+ "name" => displayName || name,
+ "host" => URI.parse(uri).host,
+ "avatar" => avatar
+ }}
+ else e ->
+ {:error, e}
+ end
+ end
+
+ def request_subscription(websub, poster \\ &HTTPoison.post/3, timeout \\ 10_000) do
+ data = [
+ "hub.mode": "subscribe",
+ "hub.topic": websub.topic,
+ "hub.secret": websub.secret,
+ "hub.callback": Helpers.websub_url(Endpoint, :websub_subscription_confirmation, websub.id)
+ ]
+
+ # This checks once a second if we are confirmed yet
+ websub_checker = fn ->
+ helper = fn (helper) ->
+ :timer.sleep(1000)
+ websub = Repo.get_by(WebsubClientSubscription, id: websub.id, state: "accepted")
+ if websub, do: websub, else: helper.(helper)
+ end
+ helper.(helper)
+ end
+
+ task = Task.async(websub_checker)
+
+ with {:ok, %{status_code: 202}} <- poster.(websub.hub, {:form, data}, ["Content-type": "application/x-www-form-urlencoded"]),
+ {:ok, websub} <- Task.yield(task, timeout) do
+ {:ok, websub}
+ else e ->
+ Task.shutdown(task)
+
+ change = Ecto.Changeset.change(websub, %{state: "rejected"})
+ {:ok, websub} = Repo.update(change)
+
+ Logger.debug("Couldn't confirm subscription: #{inspect(websub)}")
+ Logger.debug("error: #{inspect(e)}")
+
+ {:error, websub}
+ end