From 72b5ea6b07d233eacb75a05344f06b50c3093166 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franti=C5=A1ek=20Boh=C3=A1=C4=8Dek?=
 <fandabohacek@gmail.com>
Date: Wed, 11 Jan 2023 22:13:53 +0100
Subject: [PATCH] feat(core): add contract builder outline

---
 .../Contracts/ContractBuilder.cs              | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 Core/NosSmooth.Core/Contracts/ContractBuilder.cs

diff --git a/Core/NosSmooth.Core/Contracts/ContractBuilder.cs b/Core/NosSmooth.Core/Contracts/ContractBuilder.cs
new file mode 100644
index 0000000..f521b9a
--- /dev/null
+++ b/Core/NosSmooth.Core/Contracts/ContractBuilder.cs
@@ -0,0 +1,80 @@
+//
+//  ContractBuilder.cs
+//
+//  Copyright (c) František Boháček. All rights reserved.
+//  Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Remora.Results;
+
+namespace NosSmooth.Core.Contracts;
+
+/// <summary>
+/// Builds <see cref="IContract"/> with given states
+/// and errors.
+/// </summary>
+/// <typeparam name="TData">The data type.</typeparam>
+/// <typeparam name="TState">The states.</typeparam>
+/// <typeparam name="TError">The errors that may be returned.</typeparam>
+public class ContractBuilder<TData, TState, TError>
+    where TState : struct, IComparable
+    where TError : struct
+    where TData : notnull
+{
+    private readonly Contractor _contractor;
+    private readonly TState _defaultState;
+
+    private TState? _fillAtState;
+    private DefaultContract<TData, TState, TError>.FillDataAsync? _fillData;
+    private Dictionary<TState, DefaultContract<TData, TState, TError>.StateActionAsync> _actions;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ContractBuilder{TData, TState, TError}"/> class.
+    /// </summary>
+    /// <param name="contractor">The contractor.</param>
+    /// <param name="defaultState">The default state of the contract.</param>
+    public ContractBuilder(Contractor contractor, TState defaultState)
+    {
+        _contractor = contractor;
+        _defaultState = defaultState;
+        _actions = new Dictionary<TState, DefaultContract<TData, TState, TError>.StateActionAsync>();
+    }
+
+    public ContractBuilder SetMoveFilter<TAny>(TState state, Func<TAny, bool> filter, TState nextState)
+    {
+
+    }
+    
+    public ContractBuilder SetMoveFilter<TAny>(TState state, TState nextState)
+    {
+
+    }
+
+    public ContractBuilder SetFillData<TAny>(TState state, Func<TAny, Result<TData>> fillData)
+    {
+        _fillAtState = state;
+        _fillData = fillData;
+    }
+    
+    public ContractBuilder SetError<TAny>(TState state, Func<TAny, TError?> error, TState nextState)
+    {
+
+    }
+
+    public ContractBuilder SetMoveAction<TAny>(TState state, Func<TAny, Task<Result<bool>>> actionFilter, TState nextState)
+    {
+
+    }
+
+    public ContractBuilder SetPacketError<TAny>(TState state, Func<TAny, TError?> error, TState nextState)
+    {
+
+    }
+
+    public IContract Build()
+    {
+        new DefaultContract<TData, TState, TError>()
+    }
+}
\ No newline at end of file
-- 
2.48.1