basic admin endgame view and add (#3)

Reviewed-on: #3

lib/chesstrainer_web/components/board/piece_component.ex

@@ -0,0 +1,33 @@
+defmodule ChesstrainerWeb.Board.PieceComponent do
+  @moduledoc """
+  Chess pieces component
+  """
+  use Phoenix.Component
+
+  attr :piece, :any, required: true
+  attr :class, :string, default: ""
+
+  def piece(assigns) do
+    assigns = assign(assigns, :path, piece_path(assigns.piece))
+
+    ~H"""
+    <%= if @path do %>
+      <img src={@path} class={@class} />
+    <% end %>
+    """
+  end
+
+  def piece_path({:king, :white, _square}), do: "/images/pieces/white/king.svg"
+  def piece_path({:queen, :white, _square}), do: "/images/pieces/white/queen.svg"
+  def piece_path({:rook, :white, _square}), do: "/images/pieces/white/rook.svg"
+  def piece_path({:bishop, :white, _square}), do: "/images/pieces/white/bishop.svg"
+  def piece_path({:knight, :white, _square}), do: "/images/pieces/white/knight.svg"
+  def piece_path({:pawn, :white, _square}), do: "/images/pieces/white/pawn.svg"
+  def piece_path({:king, :black, _square}), do: "/images/pieces/black/king.svg"
+  def piece_path({:queen, :black, _square}), do: "/images/pieces/black/queen.svg"
+  def piece_path({:rook, :black, _square}), do: "/images/pieces/black/rook.svg"
+  def piece_path({:bishop, :black, _square}), do: "/images/pieces/black/bishop.svg"
+  def piece_path({:knight, :black, _square}), do: "/images/pieces/black/knight.svg"
+  def piece_path({:pawn, :black, _square}), do: "/images/pieces/black/pawn.svg"
+  def piece_path(_), do: nil
+end