+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Instances.Instance do
@moduledoc "Instance."
alias Pleroma.Instances
- alias Pleroma.Repo
alias Pleroma.Instances.Instance
+ alias Pleroma.Repo
use Ecto.Schema
schema "instances" do
field(:host, :string)
- field(:unreachable_since, :naive_datetime)
+ field(:unreachable_since, :naive_datetime_usec)
+ field(:favicon, :string)
+ field(:favicon_updated_at, :naive_datetime)
timestamps()
end
def changeset(struct, params \\ %{}) do
struct
- |> cast(params, [:host, :unreachable_since])
+ |> cast(params, [:host, :unreachable_since, :favicon, :favicon_updated_at])
|> validate_required([:host])
|> unique_constraint(:host)
end
def set_unreachable(url_or_host, unreachable_since \\ nil)
def set_unreachable(url_or_host, unreachable_since) when is_binary(url_or_host) do
- unreachable_since = unreachable_since || DateTime.utc_now()
+ unreachable_since = parse_datetime(unreachable_since) || NaiveDateTime.utc_now()
host = host(url_or_host)
existing_record = Repo.get_by(Instance, %{host: host})
end
def set_unreachable(_, _), do: {:error, nil}
+
+ defp parse_datetime(datetime) when is_binary(datetime) do
+ NaiveDateTime.from_iso8601(datetime)
+ end
+
+ defp parse_datetime(datetime), do: datetime
+
+ def get_or_update_favicon(%URI{host: host} = instance_uri) do
+ existing_record = Repo.get_by(Instance, %{host: host})
+ now = NaiveDateTime.utc_now()
+
+ if existing_record && existing_record.favicon_updated_at &&
+ NaiveDateTime.diff(now, existing_record.favicon_updated_at) < 86_400 do
+ existing_record.favicon
+ else
+ favicon = scrape_favicon(instance_uri)
+
+ if existing_record do
+ existing_record
+ |> changeset(%{favicon: favicon, favicon_updated_at: now})
+ |> Repo.update()
+ else
+ %Instance{}
+ |> changeset(%{host: host, favicon: favicon, favicon_updated_at: now})
+ |> Repo.insert()
+ end
+
+ favicon
+ end
+ end
+
+ defp scrape_favicon(%URI{} = instance_uri) do
+ try do
+ with {:ok, %Tesla.Env{body: html}} <-
+ Pleroma.HTTP.get(to_string(instance_uri), [{:Accept, "text/html"}]),
+ favicon_rel <-
+ html
+ |> Floki.parse_document!()
+ |> Floki.attribute("link[rel=icon]", "href")
+ |> List.first(),
+ favicon <- URI.merge(instance_uri, favicon_rel) |> to_string(),
+ true <- is_binary(favicon) do
+ favicon
+ else
+ _ -> nil
+ end
+ rescue
+ _ -> nil
+ end
+ end
end