basics being displayed

lib/cobblemon_ui/cobblemon_fs/party_store.ex

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+defmodule CobblemonUi.CobblemonFS.PartyStore do
+  @moduledoc """
+  Parses a player's party storage `.dat` file.
+
+  Party layout:
+    Root -> party -> slot0..slot5
+  """
+
+  alias CobblemonUi.CobblemonFS.{NBT, Pokemon}
+
+  @party_slots 6
+
+  @doc """
+  Reads and parses a party `.dat` file at the given path.
+
+  Returns `{:ok, [pokemon | nil]}` or `{:error, reason}`.
+  """
+  @spec parse(String.t()) :: {:ok, list(map() | nil)} | {:error, term()}
+  def parse(path) do
+    with {:ok, data} <- File.read(path),
+         {:ok, {_name, root}} <- NBT.decode(data) do
+      party = Map.get(root, "party", %{})
+      slots = for i <- 0..(@party_slots - 1), do: Pokemon.normalize(Map.get(party, "slot#{i}"))
+      {:ok, slots}
+    else
+      {:error, :enoent} -> {:error, :not_found}
+      {:error, reason} -> {:error, {:corrupt_data, reason}}
+    end
+  end
+end