X-Git-Url: https://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Finstances%2Finstance.ex;h=a1f935232e69642362be744881f1db6a311125fa;hb=e1a1c8e7de5e10fa64d168dc5d35a80b96767395;hp=420803a8fa84203c28335d0e5c198a737d0c1d20;hpb=aac48d0cc6893c231c88d5cd7fe0334353bbf299;p=akkoma

diff --git a/lib/pleroma/instances/instance.ex b/lib/pleroma/instances/instance.ex
index 420803a8f..a1f935232 100644
--- a/lib/pleroma/instances/instance.ex
+++ b/lib/pleroma/instances/instance.ex
@@ -1,3 +1,7 @@
+# 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."
 
@@ -13,6 +17,8 @@ defmodule Pleroma.Instances.Instance do
   schema "instances" do
     field(:host, :string)
     field(:unreachable_since, :naive_datetime_usec)
+    field(:favicon, :string)
+    field(:favicon_updated_at, :naive_datetime)
 
     timestamps()
   end
@@ -21,7 +27,7 @@ defmodule Pleroma.Instances.Instance do
 
   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
@@ -86,7 +92,7 @@ defmodule Pleroma.Instances.Instance do
   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})
 
@@ -110,4 +116,54 @@ defmodule Pleroma.Instances.Instance do
   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