timothyandClaude Opus 4.8
f54c9ae195
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Extract the byte-identical PlaybackOrder -> IMediaCollectionEnumerator switch shared by SchedulingEngine.EnumeratorForContent (Scripted) and EnumeratorCache.GetEnumeratorForContent (Sequential/YAML) into one static per-family seam, mirroring #380's ShuffleSourceBuilder. Each engine keeps its own "not supported" warning on the None branch, so the per-engine message is unchanged. Adds ContentEnumeratorBuilderTests pinning the block-shuffle-not-classic trap and the unsupported-order -> None (#70) contract across all 8 unsupported orders. Corrects the testing.scripted-playout-golden-deferred decision record: Scripted's external-process + HTTP pipeline is integration-only (deferred to #563), but the in-process SchedulingEngine it drives IS unit-testable (ScriptedScheduleController is a 1:1 pass-through) -- the earlier "un-golden-able by construction" framing conflated transport with engine. docs/testing.md reframed to match. [decisions-edit] fixes #395 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
48 lines
2.4 KiB
C#
48 lines
2.4 KiB
C#
using ErsatzTV.Core.Domain;
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using ErsatzTV.Core.Interfaces.Scheduling;
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using ErsatzTV.Core.Scheduling.BlockScheduling;
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namespace ErsatzTV.Core.Scheduling;
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/// <summary>
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/// Builds the stateless-index <see cref="IMediaCollectionEnumerator" /> for a single content entry from its
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/// <see cref="PlaybackOrder" /> and flat item list.
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/// <para>
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/// Extracted (issue #395) so the Scripted engine (<c>SchedulingEngine.EnumeratorForContent</c>) and the
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/// Sequential/YAML engine (<c>EnumeratorCache.GetEnumeratorForContent</c>) share ONE construction switch
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/// instead of two byte-identical copies. Kept a <c>public static</c> helper with dependencies passed as
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/// parameters, matching the sibling <see cref="ShuffleSourceBuilder" /> / <see cref="MultiPartEpisodeGrouper" />
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/// seams (issue #380).
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/// </para>
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/// <para>
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/// Deliberately per-family and narrow: only <see cref="PlaybackOrder.Chronological" /> and
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/// <see cref="PlaybackOrder.Shuffle" /> are supported, and Shuffle maps to the <em>block</em> variant
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/// <see cref="BlockPlayoutShuffledMediaCollectionEnumerator" /> — NOT Classic's
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/// <see cref="ShuffledMediaCollectionEnumerator" />, which is a different algorithm. Every other order returns
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/// <see cref="Option{A}" />.<c>None</c> so each caller logs its own engine-specific "not supported" warning
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/// (#70); folding the warning in here would lose that per-engine message.
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/// </para>
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/// </summary>
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public static class ContentEnumeratorBuilder
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{
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public static Option<IMediaCollectionEnumerator> ForContent(
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List<MediaItem> items,
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CollectionEnumeratorState state,
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PlaybackOrder playbackOrder,
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bool multiPart)
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{
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switch (playbackOrder)
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{
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case PlaybackOrder.Chronological:
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return new ChronologicalMediaCollectionEnumerator(items, state);
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case PlaybackOrder.Shuffle:
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List<GroupedMediaItem> groupedMediaItems = multiPart
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? MultiPartEpisodeGrouper.GroupMediaItems(items, false)
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: items.Map(mi => new GroupedMediaItem(mi, null)).ToList();
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return new BlockPlayoutShuffledMediaCollectionEnumerator(groupedMediaItems, state);
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default:
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return Option<IMediaCollectionEnumerator>.None;
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}
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}
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}
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