counter_cache.ex
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counter_cache.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.CounterCache do
	alias Pleroma.CounterCache
	alias Pleroma.Repo
	use Ecto.Schema
	import Ecto.Changeset
	import Ecto.Query

	schema "counter_cache" do
	field(:name, :string)
	field(:count, :integer)
	end

	def changeset(struct, params) do
	struct
	\|> cast(params, [:name, :count])
	\|> validate_required([:name])
	\|> unique_constraint(:name)
	end

	def get_as_map(names) when is_list(names) do
	CounterCache
	\|> where([cc], cc.name in ^names)
	\|> Repo.all()
	\|> Enum.group_by(& &1.name, & &1.count)
	\|> Map.new(fn {k, v} -> {k, hd(v)} end)
	end

	def set(name, count) do
	%CounterCache{}
	\|> changeset(%{"name" => name, "count" => count})
	\|> Repo.insert(
	on_conflict: [set: [count: count]],
	returning: true,
	conflict_target: :name
	)
	end
	end