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47 lines
2.6 KiB
C#
47 lines
2.6 KiB
C#
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using AIStudio.Settings;
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namespace AIStudio.Tools.Services;
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/// <summary>
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/// Answers whether an edit throws the stored index of a data source away.
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/// </summary>
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/// <remarks>
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/// Nothing here knows which settings matter. Both questions are answered by building the embedding
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/// signature twice and comparing the two, so the single place which decides stays
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/// BuildEmbeddingSignature and this cannot drift away from what an indexing run then does.
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/// </remarks>
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internal static class EmbeddingChangeImpact
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{
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/// <summary>
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/// Whether an edited embedding provider invalidates what is stored for one of its data sources.
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/// </summary>
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/// <param name="dataSource">The data source, which the edit leaves alone.</param>
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/// <param name="before">The embedding provider as it is stored.</param>
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/// <param name="after">The embedding provider as it would be stored.</param>
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/// <returns>True when the stored index would be discarded.</returns>
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public static bool AffectsStoredIndex(IDataSource dataSource, EmbeddingProvider before, EmbeddingProvider after) =>
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!string.Equals(
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DataSourceEmbeddingService.BuildEmbeddingSignature(dataSource, before),
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DataSourceEmbeddingService.BuildEmbeddingSignature(dataSource, after),
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StringComparison.Ordinal);
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/// <summary>
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/// Whether an edited data source invalidates what is stored for it.
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/// </summary>
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/// <remarks>
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/// Each side is asked with the embedding provider it points at, never both with the same one. A
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/// data source carries only the id of its provider, while the signature carries what that provider
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/// is, so comparing both sides against one of them would report a changed embedding as no change
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/// at all -- and the next indexing run would then rebuild everything unannounced.
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/// </remarks>
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/// <param name="before">The data source as it is stored.</param>
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/// <param name="beforeProvider">The embedding provider it points at today.</param>
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/// <param name="after">The data source as it would be stored.</param>
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/// <param name="afterProvider">The embedding provider it would point at.</param>
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/// <returns>True when the stored index would be discarded.</returns>
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public static bool AffectsStoredIndex(IDataSource before, EmbeddingProvider beforeProvider, IDataSource after, EmbeddingProvider afterProvider) =>
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!string.Equals(
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DataSourceEmbeddingService.BuildEmbeddingSignature(before, beforeProvider),
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DataSourceEmbeddingService.BuildEmbeddingSignature(after, afterProvider),
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StringComparison.Ordinal);
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}
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