Merge remote-tracking branch 'origin/develop' into global-status-expiration

[akkoma] / lib / pleroma / instances / instance.ex

diff --git a/lib/pleroma/instances/instance.ex b/lib/pleroma/instances/instance.ex
index 4507ef6d5faf22077f55edebddd811b5aa0beec7..74458c09aa5043ed0e491fb51eb64101f106c95f 100644 (file)
--- a/lib/pleroma/instances/instance.ex
+++ b/lib/pleroma/instances/instance.ex
@@ -1,77 +1,123 @@
+# 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.Instances.Instance
+  alias Pleroma.Repo
 
   use Ecto.Schema
 
-  import Ecto.{Query, Changeset}
-
-  alias Pleroma.Repo
+  import Ecto.Query
+  import Ecto.Changeset
 
   schema "instances" do
     field(:host, :string)
-    field(:unreachable_since, :naive_datetime)
-    field(:reachability_checked_at, :naive_datetime)
+    field(:unreachable_since, :naive_datetime_usec)
 
     timestamps()
   end
 
-  def update_changeset(struct, params \\ %{}) do
+  defdelegate host(url_or_host), to: Instances
+
+  def changeset(struct, params \\ %{}) do
     struct
-    |> cast(params, [:host, :unreachable_since, :reachability_checked_at])
+    |> cast(params, [:host, :unreachable_since])
+    |> validate_required([:host])
     |> unique_constraint(:host)
   end
 
-  def reachable?(url) do
+  def filter_reachable([]), do: %{}
+
+  def filter_reachable(urls_or_hosts) when is_list(urls_or_hosts) do
+    hosts =
+      urls_or_hosts
+      |> Enum.map(&(&1 && host(&1)))
+      |> Enum.filter(&(to_string(&1) != ""))
+
+    unreachable_since_by_host =
+      Repo.all(
+        from(i in Instance,
+          where: i.host in ^hosts,
+          select: {i.host, i.unreachable_since}
+        )
+      )
+      |> Map.new(& &1)
+
+    reachability_datetime_threshold = Instances.reachability_datetime_threshold()
+
+    for entry <- Enum.filter(urls_or_hosts, &is_binary/1) do
+      host = host(entry)
+      unreachable_since = unreachable_since_by_host[host]
+
+      if !unreachable_since ||
+           NaiveDateTime.compare(unreachable_since, reachability_datetime_threshold) == :gt do
+        {entry, unreachable_since}
+      end
+    end
+    |> Enum.filter(& &1)
+    |> Map.new(& &1)
+  end
+
+  def reachable?(url_or_host) when is_binary(url_or_host) do
     !Repo.one(
       from(i in Instance,
         where:
-          i.host == ^host(url) and i.unreachable_since <= ^Instances.reachability_time_threshold(),
+          i.host == ^host(url_or_host) and
+            i.unreachable_since <= ^Instances.reachability_datetime_threshold(),
         select: true
       )
     )
   end
 
-  def set_reachable(url) do
-    Repo.update_all(
-      from(i in Instance, where: i.host == ^host(url)),
-      set: [
-        unreachable_since: nil,
-        reachability_checked_at: DateTime.utc_now()
-      ]
-    )
+  def reachable?(_), do: true
+
+  def set_reachable(url_or_host) when is_binary(url_or_host) do
+    with host <- host(url_or_host),
+         %Instance{} = existing_record <- Repo.get_by(Instance, %{host: host}) do
+      {:ok, _instance} =
+        existing_record
+        |> changeset(%{unreachable_since: nil})
+        |> Repo.update()
+    end
   end
 
-  def set_unreachable(url, unreachable_since \\ nil) do
-    unreachable_since = unreachable_since || DateTime.utc_now()
-    host = host(url)
+  def set_reachable(_), do: {:error, nil}
+
+  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 = parse_datetime(unreachable_since) || NaiveDateTime.utc_now()
+    host = host(url_or_host)
     existing_record = Repo.get_by(Instance, %{host: host})
 
-    changes = %{
-      unreachable_since: unreachable_since,
-      reachability_checked_at: NaiveDateTime.utc_now()
-    }
-
-    if existing_record do
-      update_changes =
-        if existing_record.unreachable_since &&
-             NaiveDateTime.compare(existing_record.unreachable_since, unreachable_since) != :gt,
-           do: Map.delete(changes, :unreachable_since),
-           else: changes
-
-      {:ok, _instance} = Repo.update(update_changeset(existing_record, update_changes))
-    else
-      {:ok, _instance} = Repo.insert(update_changeset(%Instance{}, Map.put(changes, :host, host)))
+    changes = %{unreachable_since: unreachable_since}
+
+    cond do
+      is_nil(existing_record) ->
+        %Instance{}
+        |> changeset(Map.put(changes, :host, host))
+        |> Repo.insert()
+
+      existing_record.unreachable_since &&
+          NaiveDateTime.compare(existing_record.unreachable_since, unreachable_since) != :gt ->
+        {:ok, existing_record}
+
+      true ->
+        existing_record
+        |> changeset(changes)
+        |> Repo.update()
     end
   end
 
-  defp host(url_or_host) do
-    if url_or_host =~ ~r/^http/i do
-      URI.parse(url_or_host).host
-    else
-      url_or_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
 end