basic admin endgame view and add (#3)

Reviewed-on: #3

priv/repo/migrations/20251105204020_create_tags.exs

@@ -0,0 +1,14 @@
+defmodule Chesstrainer.Repo.Migrations.CreateTags do
+  use Ecto.Migration
+
+  def change do
+    create table(:tags) do
+      add :name, :string
+      add :category, :string
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create unique_index(:tags, [:name, :category])
+  end
+end

priv/repo/migrations/20251127164545_create_endgames.exs

@@ -0,0 +1,23 @@
+defmodule Chesstrainer.Repo.Migrations.CreateEndgames do
+  use Ecto.Migration
+
+  def change do
+    create table(:endgames, primary_key: false) do
+      add :id, :binary_id, primary_key: true
+      add :fen, :string
+      add :color, :string
+      add :key, :string
+      add :message, :text
+      add :notes, :text
+      add :result, :string
+      add :rating, :integer, default: 1500
+      add :rating_deviation, :integer, default: 350
+      add :times_attempted, :integer, default: 0
+      add :times_solved, :integer, default: 0
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create unique_index(:endgames, [:fen])
+  end
+end

priv/repo/migrations/20251205210539_create_endgames_tags.exs

@@ -0,0 +1,12 @@
+defmodule Chesstrainer.Repo.Migrations.CreateEndgamesTags do
+  use Ecto.Migration
+
+  def change do
+    create table(:endgames_tags, primary_key: false) do
+      add :endgame_id, references(:endgames, type: :binary_id, on_delete: :delete_all)
+      add :tag_id, references(:tags, on_delete: :delete_all)
+    end
+
+    create unique_index(:endgames_tags, [:endgame_id, :tag_id])
+  end
+end

priv/repo/seeds.exs

@@ -9,3 +9,57 @@
 #
 # We recommend using the bang functions (`insert!`, `update!`
 # and so on) as they will fail if something goes wrong.
+
+alias Chesstrainer.Repo
+alias Chesstrainer.Endgames.Endgame
+alias Chesstrainer.Tags.Tag
+
+now = DateTime.utc_now() |> DateTime.truncate(:second)
+
+IO.puts("🌱 Seeding basic endgames into DB...")
+
+Repo.insert_all(Endgame, [
+  %{
+    id: Ecto.UUID.generate(),
+    fen: "8/8/3k4/8/8/3K1R2/8/8 w - - 0 1",
+    color: :white,
+    key: "KR v K",
+    message: "Rook vs king endgame",
+    notes: "Basic rook endgame",
+    result: :win,
+    inserted_at: now,
+    updated_at: now
+  },
+  %{
+    id: Ecto.UUID.generate(),
+    fen: "6k1/5p2/6p1/8/7p/8/6PP/6K1 b - - 0 0",
+    color: :black,
+    key: "KPPP v KPP",
+    message: "3 pawns vs 2 pawns",
+    notes: "https://www.chessgames.com/perl/chessgame?gid=1017147",
+    result: :win,
+    inserted_at: now,
+    updated_at: now
+  }
+])
+
+IO.puts("✅ Done seeding endgames.")
+
+IO.puts("🌱 Seeding endgame tags into DB...")
+
+Repo.insert_all(Tag, [
+  %{
+    name: "mate in 2",
+    category: :endgame,
+    inserted_at: now,
+    updated_at: now
+  },
+  %{
+    name: "mate in 3",
+    category: :endgame,
+    inserted_at: now,
+    updated_at: now
+  }
+])
+
+IO.puts("✅ Done seeding endgame tags.")