XStatelessCompiler

XState JSON state machine to Stateless compiler

Features

• OnEntry and OnExit effects
• Guarded and unguarded transitions
• Always transitions
• Context support
• Customizable state and context management

Available for

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Usage

//Read XState json var json = File.ReadAllText("xstate_machine.json"); //Compile var compiler = new XStateCompiler(json); var machine = compiler.Compile(); //Fire events machine.RaiseEvent("START"); //Access state var stateName = machine.State.Name;

Defining effects and context properties

var machine = compiler.Compile(); //Initialize context property machine.Context["retries"] = true; //Define effects machine.SetEffect("increment", (context, e) => ++context["retries"]);

Using custom context and state management

//Create state and context store var stateStore = new MemoryStateStore(initialState: new("initial")); var contextStore = new MemoryContextStore(); //Initialize state machine with custom state and context stores var machine = XStateMachine .Create(stateStore) .WithContext(contextStore); var compiler = new XStateCompiler(json); var machine = compiler.CompileFrom(machine);

Create custom state stores by extending BaseStateStore

public class MemoryStateStore : BaseStateStore { private XState _currentState; protected override Func<XState> GetState { get; set; } protected override Action<XState> SetState { get; set; } public MemoryStateStore(XState initialState) { _currentState = initialState; //Override SetState and GetState SetState = (state) => _currentState = state; GetState = () => _currentState; } }

Create custom context stores by extending BaseContextStore

public class MemoryContextStore : BaseContextStore { private readonly Dictionary<string, dynamic> _context = new(); protected override Func<string, dynamic> GetContext { get; set; } protected override Action<string, dynamic> SetContext { get; set; } public MemoryContextStore() { //Override SetContext and GetContext SetContext = (key, value) => _context[key] = value; GetContext = (key) => _context[key]; } }

License

Copyright (c) 2023 Marco Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.