f8e0f20296
* Scaffold Python project * Add Workflow Variable accessor * Add RunPython activity * Add option to register scripts via options
71 lines
2.5 KiB
C#
71 lines
2.5 KiB
C#
using System.Runtime.CompilerServices;
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using Elsa.CSharp.Contracts;
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using Elsa.CSharp.Extensions;
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using Elsa.CSharp.Models;
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using Elsa.Extensions;
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using Elsa.Workflows.Core;
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using Elsa.Workflows.Core.Attributes;
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using Elsa.Workflows.Core.Models;
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// ReSharper disable once CheckNamespace
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namespace Elsa.CSharp.Activities;
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/// <summary>
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/// Executes C# code.
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/// </summary>
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[Activity("Elsa", "Scripting", "Executes C# code", DisplayName = "Run C#")]
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public class RunCSharp : CodeActivity<object?>
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{
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/// <inheritdoc />
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public RunCSharp([CallerFilePath] string? source = default, [CallerLineNumber] int? line = default) : base(source, line)
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{
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}
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/// <inheritdoc />
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public RunCSharp(string script, [CallerFilePath] string? source = default, [CallerLineNumber] int? line = default) : this(source, line)
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{
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Script = new Input<string>(script);
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}
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/// <summary>
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/// The script to run.
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/// </summary>
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[Input(
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Description = "The script to run.",
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UIHint = InputUIHints.CodeEditor,
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OptionsProvider = typeof(RunCSharpOptionsProvider)
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)]
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public Input<string> Script { get; set; } = new("");
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/// <summary>
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/// A list of possible outcomes. Use "SetOutcome(string)" to set the outcome. Use "SetOutcomes(params string[])" to set multiple outcomes.
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/// </summary>
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[Input(Description = "A list of possible outcomes.", UIHint = InputUIHints.DynamicOutcomes)]
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public Input<ICollection<string>> PossibleOutcomes { get; set; } = default!;
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/// <inheritdoc />
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protected override async ValueTask ExecuteAsync(ActivityExecutionContext context)
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{
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var script = context.Get(Script);
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// If no script was specified, there's nothing to do.
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if (string.IsNullOrWhiteSpace(script))
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return;
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// Get a C# evaluator.
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var evaluator = context.GetRequiredService<ICSharpEvaluator>();
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// Run the script.
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var result = await evaluator.EvaluateAsync(script, typeof(object), context.ExpressionExecutionContext, context.CancellationToken);
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// Set the result as output, if any.
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if (result is not null)
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context.Set(Result, result);
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// Get the outcome or outcomes set by the script, if any. If not set, use "Done".
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var outcomes = context.ExpressionExecutionContext.TransientProperties.GetValueOrDefault(OutcomeProxy.OutcomePropertiesKey, () => new[] { "Done" })!;
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// Complete the activity with the outcome.
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await context.CompleteActivityWithOutcomesAsync(outcomes);
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}
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} |