Economy v2 のドロップ テーブルとランダム化されたルート

{
  "TreasureChest": {
    "Rolls": 1,
    "Items": [
      { "ItemId": "{{CommonSwordID}}", "Weight": 1000, "MinQuantity": 1, "MaxQuantity": 1 },
      { "ItemId": "{{UncommonSwordID}}", "Weight": 100, "MinQuantity": 1, "MaxQuantity": 1 },
      { "ItemId": "{{RareSwordID}}", "Weight": 10, "MinQuantity": 1, "MaxQuantity": 1 },
      { "ItemId": "{{LegendarySwordID}}", "Weight": 1, "MinQuantity": 1, "MaxQuantity": 1 }
    ]
  },
  "SupplyCrate": {
    "Rolls": 3,
    "Items": [
      { "ItemId": "{{HealthPotionID}}", "Weight": 50, "MinQuantity": 1, "MaxQuantity": 5 },
      { "ItemId": "{{ManaPotionID}}", "Weight": 50, "MinQuantity": 1, "MaxQuantity": 3 },
      { "ItemId": "{{GoldCurrencyID}}", "Weight": 80, "MinQuantity": 10, "MaxQuantity": 100 },
      { "ItemId": "{{RareGemID}}", "Weight": 5, "MinQuantity": 1, "MaxQuantity": 1 }
    ]
  }
}

{
  "Key": "LootTables",
  "Value": "{\"TreasureChest\":{\"Rolls\":1,\"Items\":[...]}}"
}

public class OpenContainerRequest
{
    public string LootTableId { get; set; }  // 例: "TreasureChest"
}

public class LootTable
{
    public int Rolls { get; set; }
    public List<LootTableEntry> Items { get; set; }
}

public class LootTableEntry
{
    public string ItemId { get; set; }
    public int Weight { get; set; }
    public int MinQuantity { get; set; }
    public int MaxQuantity { get; set; }
}

public static LootTableEntry RollOnTable(LootTable table, Random rng)
{
    int totalWeight = table.Items.Sum(e => e.Weight);
    int roll = rng.Next(0, totalWeight);

    int cumulative = 0;
    foreach (var entry in table.Items)
    {
        cumulative += entry.Weight;
        if (roll < cumulative)
            return entry;
    }

    // フォールバック (ここには到達しないはず)
    return table.Items.Last();
}

[FunctionName("OpenLootContainer")]
public static async Task<dynamic> Run(
    [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
    ILogger log)
{
    // 1. PlayFab コンテキストとリクエストを解析する
    var context = JsonConvert.DeserializeObject<FunctionExecutionContext<dynamic>>(
        await req.ReadAsStringAsync());
    var args = context.FunctionArgument != null
        ? JsonConvert.DeserializeObject<OpenContainerRequest>(
            context.FunctionArgument.ToString())
        : null;

    if (args == null || string.IsNullOrEmpty(args.LootTableId))
        return new { Error = "LootTableId is required." };

    var playerEntity = context.CallerEntityProfile.Entity;
    var settings = new PlayFabApiSettings
    {
        TitleId = context.TitleAuthenticationContext.Id,
        DeveloperSecretKey = Environment.GetEnvironmentVariable("PLAYFAB_DEV_SECRET_KEY")
    };
    var authContext = new PlayFabAuthenticationContext
    {
        EntityToken = context.TitleAuthenticationContext.EntityToken
    };

    var serverApi = new PlayFabServerInstanceAPI(settings);
    var economyApi = new PlayFabEconomyInstanceAPI(settings, authContext);

    // 2. Title Data からルート テーブルを読み取る
    var titleDataResult = await serverApi.GetTitleDataAsync(new GetTitleDataRequest
    {
        Keys = new List<string> { "LootTables" }
    });

    if (!titleDataResult.Result.Data.ContainsKey("LootTables"))
        return new { Error = "LootTables not found in Title Data." };

    var allTables = JsonConvert.DeserializeObject<Dictionary<string, LootTable>>(
        titleDataResult.Result.Data["LootTables"]);

    if (!allTables.ContainsKey(args.LootTableId))
        return new { Error = $"Loot table '{args.LootTableId}' not found." };

    var lootTable = allTables[args.LootTableId];

    // 3. 報酬のためロールする
    var rng = new Random();
    var rewards = new Dictionary<string, int>(); // ItemId -> 合計数量

    for (int i = 0; i < lootTable.Rolls; i++)
    {
        var entry = RollOnTable(lootTable, rng);
        int quantity = rng.Next(entry.MinQuantity, entry.MaxQuantity + 1);

        if (rewards.ContainsKey(entry.ItemId))
            rewards[entry.ItemId] += quantity;
        else
            rewards[entry.ItemId] = quantity;
    }

    // 4. アトミック操作を構築: 1 個のコンテナ トークンを減算 + 報酬を追加
    var operations = new List<InventoryOperation>();

    // コンテナ トークンを減算
    // コンテナ通貨 ID は LootTableId のマッピングと一致する必要があります
    // このマッピングは Title Data に格納するか、命名規則を使用してください
    operations.Add(new InventoryOperation
    {
        Subtract = new SubtractInventoryItemsOperation
        {
            Item = new InventoryItemReference
            {
                Id = GetContainerCurrencyId(args.LootTableId) // マッピング ロジック
            },
            Amount = 1
        }
    });

    // 各報酬を追加
    foreach (var reward in rewards)
    {
        operations.Add(new InventoryOperation
        {
            Add = new AddInventoryItemsOperation
            {
                Item = new InventoryItemReference { Id = reward.Key },
                Amount = reward.Value
            }
        });
    }

    // 5. アトミックに実行
    var executeResult = await economyApi.ExecuteInventoryOperationsAsync(
        new ExecuteInventoryOperationsRequest
        {
            Entity = new EntityKey
            {
                Id = playerEntity.Id,
                Type = playerEntity.Type
            },
            Operations = operations,
            IdempotencyId = Guid.NewGuid().ToString()
        });

    if (executeResult.Error != null)
    {
        log.LogError($"Failed to execute operations: {executeResult.Error.ErrorMessage}");
        return new { Error = executeResult.Error.ErrorMessage };
    }

    log.LogInformation($"Player {playerEntity.Id} opened {args.LootTableId}, received: " +
        string.Join(", ", rewards.Select(r => $"{r.Value}x {r.Key}")));

    return new { Rewards = rewards, TransactionIds = executeResult.Result.TransactionIds };
}

{
    "FunctionName": "OpenLootContainer",
    "FunctionParameter": {
        "LootTableId": "TreasureChest"
    },
    "GeneratePlayStreamEvent": true
}

{
    "FunctionResult": {
        "Rewards": {
            "{{UncommonSwordID}}": 1
        },
        "TransactionIds": ["txn-abc-123"]
    }
}

{
  "Items": [
    { "ItemId": "CommonItem",     "Weight": 1000, "MinQuantity": 1, "MaxQuantity": 1 },
    { "ItemId": "UncommonItem",   "Weight": 100,  "MinQuantity": 1, "MaxQuantity": 1 },
    { "ItemId": "RareItem",       "Weight": 10,   "MinQuantity": 1, "MaxQuantity": 1 },
    { "ItemId": "LegendaryItem",  "Weight": 1,    "MinQuantity": 1, "MaxQuantity": 1 }
  ]
}

{
  "Rolls": 3,
  "Items": [
    { "ItemId": "{{HealthPotionID}}", "Weight": 40, "MinQuantity": 1, "MaxQuantity": 3 },
    { "ItemId": "{{ManaPotionID}}",   "Weight": 40, "MinQuantity": 1, "MaxQuantity": 3 },
    { "ItemId": "{{GoldCurrencyID}}", "Weight": 30, "MinQuantity": 10, "MaxQuantity": 50 },
    { "ItemId": "{{RareGemID}}",      "Weight": 5,  "MinQuantity": 1, "MaxQuantity": 1 }
  ]
}

{
  "BossDropTable": {
    "Rolls": 2,
    "Items": [
      { "ItemId": "TABLE:WeaponDropTable", "Weight": 50, "MinQuantity": 1, "MaxQuantity": 1 },
      { "ItemId": "TABLE:ArmorDropTable",  "Weight": 30, "MinQuantity": 1, "MaxQuantity": 1 },
      { "ItemId": "{{GoldCurrencyID}}",    "Weight": 80, "MinQuantity": 50, "MaxQuantity": 200 }
    ]
  }
}