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Added IO and Validation services
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‎ServerlessWorkflow.Sdk/Extensions/EvaluationResultsExtensions.cs

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namespace ServerlessWorkflow.Sdk;
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/// <summary>
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/// Defines extensions for <see cref="EvaluationResults"/>
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/// </summary>
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public static class EvaluationResultsExtensions
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{
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/// <summary>
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/// Gets the errors that have occured during evaluation
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/// </summary>
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/// <param name="results">The extended <see cref="EvaluationResults"/></param>
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/// <returns>A new <see cref="IEnumerable{T}"/> containing key/value mapping of the errors that have occured during evaluation</returns>
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public static IEnumerable<KeyValuePair<string, string>> GetErrors(this EvaluationResults results)
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{
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return results.Details.Where(d => !d.IsValid && d.Errors?.Any() == true).Select(e => new KeyValuePair<string, string>(e.EvaluationPath.ToString(), string.Join(Environment.NewLine, e.Errors!.Select(kvp => kvp.Value))));
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}
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}

‎ServerlessWorkflow.Sdk/Extensions/IServiceCollectionExtensions.cs

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using FluentValidation;
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using Microsoft.Extensions.DependencyInjection;
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using ServerlessWorkflow.Sdk.Services.FluentBuilders;
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using ServerlessWorkflow.Sdk.Services.IO;
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using ServerlessWorkflow.Sdk.Services.Validation;
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namespace ServerlessWorkflow.Sdk;
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/// <summary>
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/// Defines extensions for <see cref="IServiceCollection"/>s
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/// </summary>
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public static class IServiceCollectionExtensions
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{
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/// <summary>
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/// Adds and configures Serverless Workflow services (<see cref="Neuroglia.Serialization.ISerializer"/>s, <see cref="IWorkflowReader"/>, <see cref="IWorkflowWriter"/>, ...)
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/// </summary>
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/// <param name="services">The <see cref="IServiceCollection"/> to configure</param>
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/// <returns>The configured <see cref="IServiceCollection"/></returns>
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public static IServiceCollection AddServerlessWorkflow(this IServiceCollection services)
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{
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services.AddHttpClient();
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services.AddSingleton<IWorkflowExternalDefinitionResolver, WorkflowExternalDefinitionResolver>();
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services.AddSingleton<IWorkflowReader, WorkflowReader>();
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services.AddSingleton<IWorkflowWriter, WorkflowWriter>();
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services.AddSingleton<IWorkflowSchemaValidator, WorkflowSchemaValidator>();
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services.AddSingleton<IWorkflowValidator, WorkflowValidator>();
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services.AddTransient<IWorkflowBuilder, WorkflowBuilder>();
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services.AddValidatorsFromAssemblyContaining<WorkflowDefinitionValidator>(ServiceLifetime.Singleton);
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return services;
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}
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}

‎ServerlessWorkflow.Sdk/Extensions/IWorkflowReaderExtensions.cs

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using ServerlessWorkflow.Sdk.Models;
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using ServerlessWorkflow.Sdk.Services.IO;
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using System;
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using System.IO;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace ServerlessWorkflow.Sdk
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{
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/// <summary>
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/// Defines extensions for <see cref="IWorkflowReader"/>s
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/// </summary>
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public static class IWorkflowReaderExtensions
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{
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/// <summary>
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/// Reads a <see cref="WorkflowDefinition"/> from the specified <see cref="Stream"/>
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/// </summary>
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/// <param name="reader">The extended <see cref="IWorkflowReader"/></param>
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/// <param name="stream">The <see cref="Stream"/> to read the <see cref="WorkflowDefinition"/> from</param>
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/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
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/// <returns>A new <see cref="WorkflowDefinition"/></returns>
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public static async Task<WorkflowDefinition> ReadAsync(this IWorkflowReader reader, Stream stream, CancellationToken cancellationToken = default)
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{
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return await reader.ReadAsync(stream, new(), cancellationToken);
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}
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/// <summary>
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/// Parses the specified input into a new <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="reader">The extended <see cref="IWorkflowReader"/></param>
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/// <param name="input">The input to parse</param>
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/// <param name="options"><see cref="WorkflowReaderOptions"/> to use</param>
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/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
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/// <returns>A new <see cref="WorkflowDefinition"/></returns>
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public static async Task<WorkflowDefinition> ParseAsync(this IWorkflowReader reader, string input, WorkflowReaderOptions options, CancellationToken cancellationToken = default)
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{
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if (string.IsNullOrWhiteSpace(input))
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throw new ArgumentNullException(nameof(input));
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using Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(input));
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return await reader.ReadAsync(stream, options, cancellationToken);
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}
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/// <summary>
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/// Parses the specified input into a new <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="reader">The extended <see cref="IWorkflowReader"/></param>
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/// <param name="input">The input to parse</param>
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/// <param name="cancellationToken">A <see cref="CancellationToken"/></param>
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/// <returns>A new <see cref="WorkflowDefinition"/></returns>
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public static async Task<WorkflowDefinition> ParseAsync(this IWorkflowReader reader, string input,CancellationToken cancellationToken = default)
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{
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return await reader.ParseAsync(input, new(), cancellationToken);
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}
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}
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}

‎ServerlessWorkflow.Sdk/Extensions/StringExtensions.cs

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/// <returns>The snake-cased string</returns>
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public static string ToSnakeCase(this string input) => YamlDotNet.Serialization.NamingConventions.UnderscoredNamingConvention.Instance.Apply(input);
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/// <summary>
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/// Determines whether or not the specified input is JSON format
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/// </summary>
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/// <param name="text">The input to check</param>
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/// <returns>A boolean indicating whether or not the specified text is JSON format</returns>
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public static bool IsJson(this string text)
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{
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if (string.IsNullOrWhiteSpace(text)) throw new ArgumentNullException(nameof(text));
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var text2 = text.Trim();
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if (!text2.StartsWith("[") || !text2.EndsWith("]"))
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{
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if (text2.StartsWith("{")) return text2.EndsWith("}");
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else return false;
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}
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return true;
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}
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}

‎ServerlessWorkflow.Sdk/Extensions/WorkflowDefinitionExtensions.cs

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namespace ServerlessWorkflow.Sdk;
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/// <summary>
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/// Defines extensions for <see cref="WorkflowDefinition"/>s
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/// </summary>
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public static class WorkflowDefinitionExtensions
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{
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/// <summary>
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/// Gets all the <see cref="ActionDefinition"/>s of the specified type declared in the <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="workflow">The <see cref="WorkflowDefinition"/> to query</param>
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/// <param name="type">The type of <see cref="ActionDefinition"/>s to get. A null value gets all <see cref="ActionDefinition"/>s</param>
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/// <returns>A new <see cref="IEnumerable{T}"/> containing the <see cref="ActionDefinition"/>s of the specified type declared in the <see cref="WorkflowDefinition"/></returns>
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public static IEnumerable<ActionDefinition> GetActions(this WorkflowDefinition workflow, string? type = null)
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{
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var actions = workflow.States.SelectMany(s => s switch
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{
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CallbackStateDefinition callbackState => new ActionDefinition[] { callbackState.Action! },
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EventStateDefinition eventState => eventState.OnEvents.SelectMany(t => t.Actions),
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ForEachStateDefinition foreachState => foreachState.Actions,
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OperationStateDefinition operationState => operationState.Actions,
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ParallelStateDefinition parallelState => parallelState.Branches.SelectMany(b => b.Actions),
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_ => Array.Empty<ActionDefinition>()
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});
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if (!string.IsNullOrWhiteSpace(type)) actions = actions.Where(a => a.Type == type);
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return actions;
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}
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/// <summary>
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/// Gets all the <see cref="FunctionReference"/>s declared in the <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="workflow">The <see cref="WorkflowDefinition"/> to query</param>
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/// <returns>A new <see cref="IEnumerable{T}"/> containing the <see cref="FunctionReference"/>s declared in the <see cref="WorkflowDefinition"/></returns>
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public static IEnumerable<FunctionReference> GetFunctionReferences(this WorkflowDefinition workflow) => workflow.GetActions(ActionType.Function).Select(a => a.Function)!;
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/// <summary>
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/// Gets all the <see cref="EventReference"/>s declared in the <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="workflow">The <see cref="WorkflowDefinition"/> to query</param>
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/// <returns>A new <see cref="IEnumerable{T}"/> containing the <see cref="EventReference"/>s declared in the <see cref="WorkflowDefinition"/></returns>
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public static IEnumerable<EventReference> GetEventReferences(this WorkflowDefinition workflow) => workflow.GetActions(ActionType.Event).Select(a => a.Event)!;
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/// <summary>
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/// Gets all the <see cref="SubflowReference"/>s declared in the <see cref="WorkflowDefinition"/>
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/// </summary>
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/// <param name="workflow">The <see cref="WorkflowDefinition"/> to query</param>
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/// <returns>A new <see cref="IEnumerable{T}"/> containing the <see cref="SubflowReference"/>s declared in the <see cref="WorkflowDefinition"/></returns>
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public static IEnumerable<SubflowReference> GetSubflowReferences(this WorkflowDefinition workflow) => workflow.GetActions(ActionType.Subflow).Select(a => a.Subflow)!;
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}

‎ServerlessWorkflow.Sdk/Models/ExternalDefinitionCollection.cs

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namespace ServerlessWorkflow.Sdk.Models;
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/// <summary>
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/// Represents a <see cref="List{T}"/> that can be loaded from an external definition file
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/// </summary>
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/// <typeparam name="T">The type of elements contained by the <see cref="ExternalDefinitionCollection{T}"/></typeparam>
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public class ExternalDefinitionCollection<T>
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: List<T>
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{
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/// <summary>
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/// Initializes a new <see cref="ExternalDefinitionCollection{T}"/>
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/// </summary>
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public ExternalDefinitionCollection()
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: base()
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{
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this.DefinitionUri = null!;
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this.Loaded = true;
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}
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/// <summary>
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/// Initializes a new <see cref="ExternalDefinitionCollection{T}"/>
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/// </summary>
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/// <param name="collection">The collection whose elements are copied into the <see cref="ExternalDefinitionCollection{T}"/></param>
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public ExternalDefinitionCollection(IEnumerable<T> collection)
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: base(collection)
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{
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this.DefinitionUri = null!;
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this.Loaded = true;
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}
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/// <summary>
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/// Initializes a new <see cref="ExternalDefinitionCollection{T}"/>
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/// </summary>
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/// <param name="definitionUri">The <see cref="Uri"/> used to reference the file that defines the elements contained by the <see cref="ExternalDefinitionCollection{T}"/></param>
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public ExternalDefinitionCollection(Uri definitionUri)
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: base()
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{
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this.DefinitionUri = definitionUri;
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this.Loaded = false;
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}
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/// <summary>
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/// Gets the <see cref="Uri"/> used to reference the file that defines the elements contained by the <see cref="ExternalDefinitionCollection{T}"/>
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/// </summary>
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public virtual Uri DefinitionUri { get; private set; }
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/// <summary>
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/// Gets a boolean indicating whether or not the <see cref="ExternalDefinitionCollection{T}"/> has been loaded
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/// </summary>
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public virtual bool Loaded { get; }
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}

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