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ActivateUser.cs - Building Workflow Driven .NET Core Applications with Elsa
using System.Threading;
using System.Threading.Tasks;
using Elsa.Attributes;
using Elsa.Expressions;
using Elsa.Results;
using Elsa.Samples.UserRegistration.Web.Models;
using Elsa.Services;
using Elsa.Services.Models;
using MongoDB.Driver;
using MongoDB.Driver.Linq;
namespace Elsa.Samples.UserRegistration.Web.Activities
{
[ActivityDefinition(Category = "Users", Description = "Activate a User", Icon = "fas fa-user-check", Outcomes = new[]{ OutcomeNames.Done, "Not Found" })]
public class ActivateUser : Activity
{
private readonly IMongoCollection<User> _store;
public ActivateUser(IMongoCollection<User> store)
{
_store = store;
}
[ActivityProperty(Hint = "Enter an expression that evaluates to the ID of the user to activate.")]
public WorkflowExpression<string> UserId
{
get => GetState<WorkflowExpression<string>>();
set => SetState(value);
}
protected override async Task<ActivityExecutionResult> OnExecuteAsync(WorkflowExecutionContext context, CancellationToken cancellationToken)
{
var userId = await context.EvaluateAsync(UserId, cancellationToken);
var user = await _store.AsQueryable().FirstOrDefaultAsync(x => x.Id == userId, cancellationToken);
if (user == null)
return Outcome("Not Found");
user.IsActive = true;
await _store.ReplaceOneAsync(x => x.Id == userId, user, cancellationToken: cancellationToken);
return Done();
}
}
}
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