Lidarr/NzbDrone.Core/DecisionEngine/DownloadDecisionMaker.cs

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using System.Collections.Generic;
using System.Linq;
using NzbDrone.Core.DecisionEngine.Specifications.Search;
using NzbDrone.Core.IndexerSearch.Definitions;
using NzbDrone.Core.Parser;
using NzbDrone.Core.Parser.Model;
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namespace NzbDrone.Core.DecisionEngine
{
public interface IMakeDownloadDecision
{
IEnumerable<DownloadDecision> GetRssDecision(IEnumerable<ReportInfo> reports);
IEnumerable<DownloadDecision> GetSearchDecision(IEnumerable<ReportInfo> reports, SearchDefinitionBase searchDefinitionBase);
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}
public class DownloadDecisionMaker : IMakeDownloadDecision
{
private readonly IEnumerable<IRejectWithReason> _specifications;
private readonly IParsingService _parsingService;
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public DownloadDecisionMaker(IEnumerable<IRejectWithReason> specifications, IParsingService parsingService)
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{
_specifications = specifications;
_parsingService = parsingService;
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}
public IEnumerable<DownloadDecision> GetRssDecision(IEnumerable<ReportInfo> reports)
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{
foreach (var report in reports)
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{
var parseResult = _parsingService.Map(report);
yield return new DownloadDecision(parseResult, GetGeneralRejectionReasons(parseResult).ToArray());
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}
}
public IEnumerable<DownloadDecision> GetSearchDecision(IEnumerable<ReportInfo> reports, SearchDefinitionBase searchDefinitionBase)
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{
foreach (var report in reports)
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{
var parseResult = _parsingService.Map(report);
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var generalReasons = GetGeneralRejectionReasons(parseResult);
var searchReasons = GetSearchRejectionReasons(parseResult, searchDefinitionBase);
yield return new DownloadDecision(parseResult, generalReasons.Union(searchReasons).ToArray());
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}
}
private IEnumerable<string> GetGeneralRejectionReasons(RemoteEpisode report)
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{
return _specifications
.OfType<IDecisionEngineSpecification>()
.Where(spec => !spec.IsSatisfiedBy(report))
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.Select(spec => spec.RejectionReason);
}
private IEnumerable<string> GetSearchRejectionReasons(RemoteEpisode report, SearchDefinitionBase searchDefinitionBase)
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{
return _specifications
.OfType<IDecisionEngineSearchSpecification>()
.Where(spec => !spec.IsSatisfiedBy(report, searchDefinitionBase))
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.Select(spec => spec.RejectionReason);
}
}
}