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