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Autogenerate switch case labels

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Sipke Schoorstra 2021-02-20 21:21:18 +01:00
parent f048e6d3ef
commit 05c15a2eaf
2 changed files with 23 additions and 10 deletions
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13
src/core/Elsa.Core/Activities/ControlFlow/Switch/SwitchCaseBuilder.cs
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@ -15,11 +15,24 @@ namespace Elsa.Activities.ControlFlow
Cases.Add(new SwitchCaseDescriptor(name, condition, builder => branch(builder.When(name))));
return this;
}
public SwitchCaseBuilder Add(Func<ActivityExecutionContext, ValueTask<bool>> condition, Action<IOutcomeBuilder> branch)
{
var caseLabel = GetNextCaseLabel();
Cases.Add(new SwitchCaseDescriptor(caseLabel, condition, builder => branch(builder.When(caseLabel))));
return this;
}
public SwitchCaseBuilder Add(string name, Func<ActivityExecutionContext, bool> condition, Action<IOutcomeBuilder> branch) => Add(name, context => new ValueTask<bool>(condition(context)), branch);
public SwitchCaseBuilder Add(string name, Func<ValueTask<bool>> condition, Action<IOutcomeBuilder> branch) => Add(name, _ => condition(), branch);
public SwitchCaseBuilder Add(string name, Func<bool> condition, Action<IOutcomeBuilder> branch) => Add(name, _ => condition(), branch);
public SwitchCaseBuilder Add(string name, bool condition, Action<IOutcomeBuilder> branch) => Add(name, _ => condition, branch);
public SwitchCaseBuilder Add(Func<ActivityExecutionContext, bool> condition, Action<IOutcomeBuilder> branch) => Add(GetNextCaseLabel(), context => new ValueTask<bool>(condition(context)), branch);
public SwitchCaseBuilder Add(Func<ValueTask<bool>> condition, Action<IOutcomeBuilder> branch) => Add(GetNextCaseLabel(), _ => condition(), branch);
public SwitchCaseBuilder Add(Func<bool> condition, Action<IOutcomeBuilder> branch) => Add(GetNextCaseLabel(), _ => condition(), branch);
public SwitchCaseBuilder Add(bool condition, Action<IOutcomeBuilder> branch) => Add(GetNextCaseLabel(), _ => condition, branch);
private string GetNextCaseLabel() => $"Case {Cases.Count + 1}";
}
public record SwitchCaseDescriptor(string Name, Func<ActivityExecutionContext, ValueTask<bool>> Condition, Action<IActivityBuilder> OutcomeBuilder);

20
src/samples/console/Elsa.Samples.SwitchConsole/GrayscaleWorkflow.cs
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@ -21,16 +21,16 @@ namespace Elsa.Samples.SwitchConsole
.WriteLine("--Grayscale Calculator--").WithName("Start")
.WriteLine("Enter a number between 0 and 100.")
.ReadLine()
.Switch( cases =>
{
cases.Add("Black", context => GetNumber(context) >= 0 && GetNumber(context) < 20, @case => @case.WriteLine("That number is black"));
cases.Add("Dark Gray", context => GetNumber(context) >= 20 && GetNumber(context) < 50, @case => @case.WriteLine("That number is dark gray"));
cases.Add("Light Gray", context => GetNumber(context) >= 50 && GetNumber(context) < 70, @case => @case.WriteLine("That number is light gray"));
cases.Add("Gray", context => GetNumber(context) >= 20 && GetNumber(context) < 70, @case => @case.WriteLine("That number is gray"));
cases.Add("White", context => GetNumber(context) >= 70 && GetNumber(context) <= 100, @case => @case.WriteLine("That number is white"));
cases.Add("Invalid", context => GetNumber(context) < 0 || GetNumber(context) > 100, @case => @case.WriteLine("That number is invalid"));
})
.WriteLine("Goodbye");
.Switch(cases =>
{
cases.Add(context => GetNumber(context) >= 0 && GetNumber(context) < 20, @case => @case.WriteLine("That number is black"));
cases.Add(context => GetNumber(context) >= 20 && GetNumber(context) < 50, @case => @case.WriteLine("That number is dark gray"));
cases.Add(context => GetNumber(context) >= 50 && GetNumber(context) < 70, @case => @case.WriteLine("That number is light gray"));
cases.Add(context => GetNumber(context) >= 20 && GetNumber(context) < 70, @case => @case.WriteLine("That number is gray"));
cases.Add(context => GetNumber(context) >= 70 && GetNumber(context) <= 100, @case => @case.WriteLine("That number is white"));
cases.Add(context => GetNumber(context) < 0 || GetNumber(context) > 100, @case => @case.WriteLine("That number is invalid"));
})
.WriteLine("Thanks for playing!");
}
private static int GetNumber(ActivityExecutionContext context) => context.GetInput<int>();