99 lines
4.6 KiB
C#
99 lines
4.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading;
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namespace OpenNest;
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/// <summary>
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/// Physical-sheet allocation. Every available stock entry is tried independently and only the selected
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/// candidate changes demand or inventory accounting.
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/// </summary>
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public sealed class NestJobRunner : INestingEngine
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{
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private readonly Func<string, IPlateNester> plateNesterFactory;
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/// <summary>Runner-local strategy resolution. A factory must reject unknown keys or return null.</summary>
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public NestJobRunner(Func<string, IPlateNester> plateNesterFactory)
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{
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ArgumentNullException.ThrowIfNull(plateNesterFactory);
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this.plateNesterFactory = plateNesterFactory;
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}
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public NestJobResult Solve(NestJob job, IProgress<NestJobProgress> progress = null,
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CancellationToken token = default)
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{
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ArgumentNullException.ThrowIfNull(job);
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token.ThrowIfCancellationRequested();
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NestJobValidator.Validate(job);
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var plates = new List<NestJobPlateResult>();
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var remaining = job.Parts.ToDictionary(part => part.Id, part => part.Quantity, StringComparer.Ordinal);
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var placed = job.Parts.ToDictionary(part => part.Id, _ => 0, StringComparer.Ordinal);
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var used = job.Plates.ToDictionary(stock => stock.Id, _ => 0, StringComparer.Ordinal);
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var comparer = new NestJobCandidateComparer(job.Parts);
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var nester = job.Parts.Count == 0 ? null : plateNesterFactory(job.Options.PlacementStrategy) ??
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throw new NotSupportedException($"Unknown placement strategy: {job.Options.PlacementStrategy}.");
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var reason = NestJobStopReason.Completed;
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while (remaining.Values.Any(count => count > 0))
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{
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token.ThrowIfCancellationRequested();
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if (job.Options.MaxPlates <= plates.Count)
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{
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reason = NestJobStopReason.PlateLimitReached;
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break;
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}
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CandidateTrial winner = null;
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var hasAvailableStock = false;
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for (var index = 0; index < job.Plates.Count; index++)
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{
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var stock = job.Plates[index];
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if (stock.Quantity is int quantity && used[stock.Id] >= quantity) continue;
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hasAvailableStock = true;
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var request = new PlatePlacementRequest(stock, job.Parts.Where(part => remaining[part.Id] > 0)
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.Select(part => new NestJobPart(part.Id, part.Geometry, remaining[part.Id], part.Priority, part.Rotation)));
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progress?.Report(new NestJobProgress(NestJobStage.EvaluatingCandidate, stock.Id,
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plates.Count, plates.Count, placed.Values.Sum()));
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token.ThrowIfCancellationRequested();
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var candidate = nester.Place(request, token: token);
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token.ThrowIfCancellationRequested();
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NestJobValidator.ValidateCandidate(candidate, remaining);
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var trial = new CandidateTrial(candidate, stock, index);
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if (winner == null || comparer.Compare(trial.Candidate, trial.Stock, trial.StockIndex,
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winner.Candidate, winner.Stock, winner.StockIndex) > 0)
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winner = trial;
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}
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if (!hasAvailableStock)
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{
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reason = NestJobStopReason.StockExhausted;
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break;
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}
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if (winner.Candidate.Placements.Count == 0)
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{
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reason = NestJobStopReason.NoPlacementFound;
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break;
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}
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var committed = new List<NestJobPlacement>();
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foreach (var pose in winner.Candidate.Placements)
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{
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committed.Add(pose with { InstanceIndex = placed[pose.PartId]++ });
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remaining[pose.PartId]--;
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}
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used[winner.Stock.Id]++;
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plates.Add(new NestJobPlateResult(plates.Count, winner.Stock, committed));
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progress?.Report(new NestJobProgress(NestJobStage.PlateCommitted, winner.Stock.Id,
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plates.Count - 1, plates.Count, placed.Values.Sum()));
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}
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token.ThrowIfCancellationRequested();
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return new NestJobResult(reason == NestJobStopReason.Completed ? NestJobStatus.Complete : NestJobStatus.Incomplete,
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reason, plates, job.Parts.Select(part => new PartFulfillment(part.Id, part.Quantity, placed[part.Id], remaining[part.Id])),
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job.Plates.Select(stock => new StockUsage(stock.Id, used[stock.Id],
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stock.Quantity is int quantity ? quantity - used[stock.Id] : null)));
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}
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private sealed record CandidateTrial(PlateCandidate Candidate, NestPlateStock Stock, int StockIndex);
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}
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