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68 lines
1.5 KiB
Elixir
68 lines
1.5 KiB
Elixir
defmodule PhilomenaWeb.UserFingerprintUpdater do
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alias Philomena.UserFingerprints.UserFingerprint
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alias Philomena.Repo
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import Ecto.Query
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alias PhilomenaWeb.Fingerprint
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def child_spec([]) do
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%{
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id: PhilomenaWeb.UserFingerprintUpdater,
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start: {PhilomenaWeb.UserFingerprintUpdater, :start_link, [[]]}
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}
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end
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def start_link([]) do
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{:ok, spawn_link(&init/0)}
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end
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def cast(user_id, fingerprint, updated_at) do
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if Fingerprint.valid_format?(fingerprint) do
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pid = Process.whereis(:fingerprint_updater)
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if pid, do: send(pid, {user_id, fingerprint, updated_at})
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end
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end
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defp init do
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Process.register(self(), :fingerprint_updater)
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run()
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end
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defp run do
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user_fps = Enum.map(receive_all(), &into_insert_all/1)
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update_query =
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update(UserFingerprint, inc: [uses: 1], set: [updated_at: fragment("EXCLUDED.updated_at")])
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Repo.insert_all(UserFingerprint, user_fps,
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on_conflict: update_query,
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conflict_target: [:user_id, :fingerprint]
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)
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:timer.sleep(:timer.seconds(60))
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run()
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end
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defp receive_all(user_fps \\ %{}) do
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receive do
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{user_id, fingerprint, updated_at} ->
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user_fps
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|> Map.put({user_id, fingerprint}, updated_at)
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|> receive_all()
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after
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0 ->
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user_fps
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end
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end
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defp into_insert_all({{user_id, fingerprint}, updated_at}) do
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%{
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user_id: user_id,
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fingerprint: fingerprint,
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uses: 1,
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created_at: updated_at,
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updated_at: updated_at
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}
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end
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end
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