61 lines
1.4 KiB
C#
61 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using AudibleApiDTOs;
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using DataLayer;
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namespace DtoImporterService
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{
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public interface IContextRunner<T>
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{
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public TResult Run<TResult>(Func<T, LibationContext, TResult> func, T param, LibationContext context = null)
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{
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if (context is null)
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{
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using (context = LibationContext.Create())
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{
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var r = Run(func, param, context);
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context.SaveChanges();
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return r;
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}
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}
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try
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{
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var exceptions = Validate(param);
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if (exceptions != null && exceptions.Any())
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throw new AggregateException($"Importer validation failed", exceptions);
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}
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catch (Exception ex)
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{
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Serilog.Log.Logger.Error(ex, "Import error: validation");
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throw;
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}
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try
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{
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var result = func(param, context);
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return result;
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}
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catch (Exception ex)
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{
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Serilog.Log.Logger.Error(ex, "Import error: post-validation importing");
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throw;
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}
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}
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IEnumerable<Exception> Validate(T param);
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}
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public abstract class ImporterBase<T> : IContextRunner<T>
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{
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/// <summary>LONG RUNNING. call with await Task.Run</summary>
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public int Import(T param, LibationContext context = null)
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=> ((IContextRunner<T>)this).Run(DoImport, param, context);
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protected abstract int DoImport(T elements, LibationContext context);
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public abstract IEnumerable<Exception> Validate(T param);
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}
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public abstract class ItemsImporterBase : ImporterBase<IEnumerable<Item>> { }
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}
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