17 lines
955 B
C#
17 lines
955 B
C#
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namespace KBX.Shared.Workflow;
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public sealed record WorkflowTransition(string Id, IReadOnlySet<string> From, string To, string? Permission = null, bool ReasonRequired = false);
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public static class WorkflowGuard
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{
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public static WorkflowTransition RequireTransition(IEnumerable<WorkflowTransition> transitions, string transitionId, string currentState, string? reason = null)
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{
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var transition = transitions.FirstOrDefault(x => string.Equals(x.Id, transitionId, StringComparison.OrdinalIgnoreCase))
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?? throw new InvalidOperationException($"Unknown transition: {transitionId}");
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if (!transition.From.Contains(currentState)) throw new InvalidOperationException($"Transition {transitionId} is not allowed from {currentState}.");
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if (transition.ReasonRequired && string.IsNullOrWhiteSpace(reason)) throw new InvalidOperationException("A reason is required for this transition.");
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return transition;
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}
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}
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