basic admin endgame view and add (#3)

Reviewed-on: #3
2026-06-22 18:44:52 +00:00
parent e955e40930
commit b47fcdffcb
82 changed files with 2031 additions and 2 deletions
@@ -0,0 +1,57 @@
+defmodule Chesstrainer.Endgames.Tablebase do
+  @moduledoc """
+  All endgame tablebase related functions.
+  """
+
+  alias Chesstrainer.Endgames.Tablebase
+
+  @type result :: :win | :draw | :loss | :unknown
+
+  @type t :: %__MODULE__{
+          category: result,
+          checkmate: boolean(),
+          dtc: integer() | nil,
+          dtm: integer() | nil,
+          dtw: integer() | nil,
+          dtz: integer() | nil,
+          insufficient_material: boolean(),
+          moves: [Tablebase.Move.t()]
+        }
+
+  defstruct category: nil,
+            checkmate: false,
+            dtc: nil,
+            dtm: nil,
+            dtw: nil,
+            dtz: nil,
+            insufficient_material: false,
+            moves: nil
+
+  @spec new(String.t()) ::
+          {:ok, t()}
+          | {:cooldown, non_neg_integer()}
+          | {:error, :invalid_endgame}
+          | {:error, term()}
+  def new(fen) do
+    case Tablebase.Cache.get(fen) do
+      {_fen, tablebase} ->
+        {:cache, tablebase}
+
+      _ ->
+        case Tablebase.Parser.from_fen(fen) do
+          {:error, reason} ->
+            {:error, reason}
+
+          {:cooldown, remaining_ms} ->
+            {:cooldown, remaining_ms}
+
+          {:ok, tablebase} when tablebase.category == :unknown ->
+            {:error, :invalid_endgame}
+
+          {:ok, tablebase} ->
+            Tablebase.Cache.put(fen, tablebase)
+            {:ok, tablebase}
+        end
+    end
+  end
+end