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using LibMatrix.Filters;
using LibMatrix.Utilities;
namespace LibMatrix.Homeservers.Extensions.NamedCaches;
public class NamedFilterCache(AuthenticatedHomeserverGeneric hs) : NamedCache<string>(hs, "gay.rory.libmatrix.named_cache.filter") {
/// <summary>
/// <inheritdoc cref="NamedCache{T}.GetOrSetValueAsync"/>
/// Allows passing a filter directly, or using a common filter.
/// Substitutes @me for the user's ID.
/// </summary>
/// <param name="key">Filter name</param>
/// <param name="filter">Filter to upload if not cached, otherwise defaults to common filters if that exists.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException"></exception>
public async Task<string> GetOrSetValueAsync(string key, SyncFilter? filter = null) {
var existingValue = await GetValueAsync(key);
if (existingValue != null) {
return existingValue;
}
if (filter is null) {
if(CommonSyncFilters.FilterMap.TryGetValue(key, out var commonFilter)) {
filter = commonFilter;
} else {
throw new ArgumentNullException(nameof(filter));
}
}
var filterUpload = await hs.UploadFilterAsync(filter);
return await SetValueAsync(key, filterUpload.FilterId);
}
}
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