Rendering champions with win rates

apps/lol_analytics/lib/lol_analytics/dimensions/champion/champion_metadata.ex

@@ -0,0 +1,44 @@
+defmodule LolAnalytics.Dimensions.Champion.ChampionMetadata do
+  alias LolAnalytics.Dimensions.Champion.ChampionRepo
+  @champions_data_url "https://ddragon.leagueoflegends.com/cdn/14.11.1/data/en_US/champion.json"
+
+  use GenServer
+
+  def update_metadata() do
+    {:ok, %{"data" => data}} = get_champions()
+
+    data
+    |> Enum.each(&save_metadata/1)
+  end
+
+  defp get_champions() do
+    with {:ok, resp} <- HTTPoison.get(@champions_data_url),
+         data <- Poison.decode(resp.body) do
+      data
+    else
+      {:error, reason} -> {:error, reason}
+    end
+  end
+
+  defp save_metadata({champion, info}) do
+    %{
+      "image" => %{
+        "full" => full_image
+      },
+      "name" => name,
+      "key" => key_string
+    } = info
+
+    attrs = %{
+      image: full_image,
+      name: name
+    }
+
+    {champion_id, _} = Integer.parse(key_string)
+
+    ChampionRepo.update(champion_id, attrs)
+
+    info
+    |> IO.inspect()
+  end
+end

apps/lol_analytics/lib/lol_analytics/dimensions/champion/champion_repo.ex

@@ -18,6 +18,13 @@ defmodule LolAnalytics.Dimensions.Champion.ChampionRepo do
     end
   end
 
+  def update(champion_id, attrs) do
+    get_or_create(champion_id)
+    |> ChampionSchema.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @spec list_champions() :: any()
   def list_champions() do
     Repo.all(ChampionSchema)
   end

apps/lol_analytics/lib/lol_analytics/dimensions/champion/champion_schema.ex

@@ -4,12 +4,14 @@ defmodule LolAnalytics.Dimensions.Champion.ChampionSchema do
 
   schema "dim_champion" do
     field :champion_id, :integer
+    field :name, :string
+    field :image, :string
     timestamps()
   end
 
   def changeset(champion = %__MODULE__{}, attrs \\ %{}) do
     champion
-    |> cast(attrs, [:champion_id])
+    |> cast(attrs, [:champion_id, :name, :image])
     |> validate_required([:champion_id])
   end
 end

apps/lol_analytics/lib/lol_analytics/facts/champion_played_game/champion_played_game_repo.ex

@@ -1,6 +1,7 @@
 defmodule LolAnalytics.Facts.ChampionPlayedGame.ChampionPlayedGameRepo do
   import Ecto.Query
 
+  alias LolAnalytics.Dimensions.Champion.ChampionSchema
   alias LolAnalytics.Dimensions.Player.PlayerRepo
   alias LolAnalytics.Dimensions.Champion.ChampionRepo
   alias LolAnalytics.Dimensions.Match.MatchRepo
@@ -9,19 +10,70 @@ defmodule LolAnalytics.Facts.ChampionPlayedGame.ChampionPlayedGameRepo do
   alias LoLAnalytics.Repo
 
   def insert(attrs) do
-    match = MatchRepo.get_or_create(attrs.match_id)
-    champion = ChampionRepo.get_or_create(attrs.champion_id)
-    player = PlayerRepo.get_or_create(attrs.puuid)
-    IO.puts(">>>>")
-    IO.inspect(attrs)
+    _match = MatchRepo.get_or_create(attrs.match_id)
+    _champion = ChampionRepo.get_or_create(attrs.champion_id)
+    _player = PlayerRepo.get_or_create(attrs.puuid)
     changeset = ChampionPlayedGameSchema.changeset(%ChampionPlayedGameSchema{}, attrs)
-
-    IO.inspect(changeset)
     Repo.insert(changeset)
-    # Repo.insert(match)
   end
 
   def list_played_matches() do
     Repo.all(ChampionPlayedGameSchema)
   end
+
+  def get_win_rates2 do
+    query2 =
+      from m in ChampionPlayedGameSchema,
+        join: c in ChampionSchema,
+        on: c.champion_id == m.champion_id,
+        select: %{
+          wins: count(m.is_win),
+          win_rate:
+            fragment(
+              "
+              ((cast(count(CASE WHEN ? THEN 1 END) as float) / cast(count(*) as float)) * 100.0
+              )",
+              m.is_win
+            ),
+          id: m.champion_id,
+          name: c.name,
+          image: c.image
+        },
+        group_by: [m.champion_id, c.image, c.name]
+
+    Repo.all(query2)
+  end
+
+  def get_win_rates() do
+    query = """
+    SELECT
+      (cast(count(CASE WHEN is_win THEN 1 END) as float) / cast(count(*) as float)) * 100.0 as win_rate,
+      count(CASE WHEN is_win THEN 1 END) as games_won,
+      count(*) as total_games,
+      champion_id
+      FROM fact_champion_played_game
+
+      GROUP BY champion_id
+      ORDER BY win_rate desc;
+    """
+
+    case Ecto.Adapters.SQL.query(Repo, query, []) do
+      {:ok, %Postgrex.Result{rows: rows}} ->
+        rows
+        |> Enum.map(fn [win_rate, wins, games, champion_id] ->
+          %{
+            win_rate: win_rate,
+            wins: wins,
+            games: games,
+            champion_id: champion_id
+          }
+        end)
+
+      {:error, _exception} ->
+        :error
+    end
+  end
+
+  def get_win_rates_by_roles() do
+  end
 end

apps/lol_analytics/priv/repo/migrations/20240530194815_champion_dim_name_image.exs

@@ -0,0 +1,10 @@
+defmodule LoLAnalytics.Repo.Migrations.ChampionDimName do
+  use Ecto.Migration
+
+  def change do
+    alter table("dim_champion") do
+      add :name, :string
+      add :image, :string
+    end
+  end
+end