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osu-lazer/osu.Game/Database/BeatmapLookupCache.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using osu.Game.Online.API.Requests;
using osu.Game.Online.API.Requests.Responses;
namespace osu.Game.Database
{
public partial class BeatmapLookupCache : OnlineLookupCache<int, APIBeatmap, GetBeatmapsRequest>
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{
/// <summary>
/// Perform an API lookup on the specified beatmap, populating a <see cref="APIBeatmap"/> model.
/// </summary>
/// <param name="beatmapId">The beatmap to lookup.</param>
/// <param name="token">An optional cancellation token.</param>
/// <returns>The populated beatmap, or null if the beatmap does not exist or the request could not be satisfied.</returns>
public Task<APIBeatmap?> GetBeatmapAsync(int beatmapId, CancellationToken token = default) => LookupAsync(beatmapId, token);
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/// <summary>
/// Perform an API lookup on the specified beatmaps, populating a <see cref="APIBeatmap"/> model.
/// </summary>
/// <param name="beatmapIds">The beatmaps to lookup.</param>
/// <param name="token">An optional cancellation token.</param>
/// <returns>The populated beatmaps. May include null results for failed retrievals.</returns>
public Task<APIBeatmap?[]> GetBeatmapsAsync(int[] beatmapIds, CancellationToken token = default) => LookupAsync(beatmapIds, token);
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protected override GetBeatmapsRequest CreateRequest(IEnumerable<int> ids) => new GetBeatmapsRequest(ids.ToArray());
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protected override IEnumerable<APIBeatmap>? RetrieveResults(GetBeatmapsRequest request) => request.Response?.Beatmaps;
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}
}