39 lines
1.1 KiB
Elixir
39 lines
1.1 KiB
Elixir
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# Use the Plot struct as it is provided
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defmodule Plot do
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@enforce_keys [:plot_id, :registered_to]
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defstruct [:plot_id, :registered_to]
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end
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defmodule CommunityGarden do
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def start(),
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do: Agent.start(fn -> %{index: 0, plots: []} end)
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def list_registrations(pid),
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do: Agent.get(pid, fn %{plots: plots} -> plots end)
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def register(pid, register_to),
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do:
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Agent.get_and_update(pid, fn %{plots: plots, index: counter} ->
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index = counter + 1
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plot = %Plot{plot_id: index, registered_to: register_to}
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{plot, %{plots: [plot | plots], index: index}}
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end)
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def release(pid, plot_id),
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do:
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Agent.cast(pid, fn %{plots: plots} = state ->
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%{state | plots: Enum.reject(plots, fn element -> compare(element, plot_id) end)}
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end)
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def get_registration(pid, plot_id) do
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list_registrations(pid)
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|> Enum.find(
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{:not_found, "plot is unregistered"},
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fn element -> compare(element, plot_id) end
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)
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end
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defp compare(%Plot{plot_id: element_id}, plot_id) when element_id == plot_id, do: true
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defp compare(_element, _plot_id), do: false
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end
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