73 lines
2.6 KiB
C#
73 lines
2.6 KiB
C#
using System.Globalization;
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using System.Threading.Channels;
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using ErsatzTV.Core;
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using ErsatzTV.Infrastructure.Data;
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using Microsoft.EntityFrameworkCore;
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using Channel = ErsatzTV.Core.Domain.Channel;
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namespace ErsatzTV.Application.Channels;
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public class UpdateChannelNumbersHandler(
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IDbContextFactory<TvContext> dbContextFactory,
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ChannelWriter<IBackgroundServiceRequest> workerChannel)
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: IRequestHandler<UpdateChannelNumbers, Option<BaseError>>
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{
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public async Task<Option<BaseError>> Handle(UpdateChannelNumbers request, CancellationToken cancellationToken)
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{
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await using TvContext dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);
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await using var transaction = await dbContext.Database.BeginTransactionAsync(cancellationToken);
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try
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{
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var numberUpdates = request.Channels.ToDictionary(c => c.Id, c => c.Number);
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var channelIds = numberUpdates.Keys;
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List<Channel> channelsToUpdate = await dbContext.Channels
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.Where(c => channelIds.Contains(c.Id))
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.ToListAsync(cancellationToken);
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// give every channel a non-conflicting number
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foreach (var channel in channelsToUpdate)
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{
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channel.Number = $"-{channel.Id}";
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}
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// save those changes
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await dbContext.SaveChangesAsync(cancellationToken);
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// give every channel the proper new number
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foreach (var channel in channelsToUpdate)
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{
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channel.Number = numberUpdates[channel.Id];
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if (double.TryParse(channel.Number, CultureInfo.InvariantCulture, out double sortNumber))
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{
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channel.SortNumber = sortNumber;
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}
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else
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{
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return BaseError.New($"Failed to parse channel number {channel.Number}");
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}
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}
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// save those changes
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await dbContext.SaveChangesAsync(cancellationToken);
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// commit the transaction
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await transaction.CommitAsync(cancellationToken);
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// update channel list and xmltv
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await workerChannel.WriteAsync(new RefreshChannelList(), cancellationToken);
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foreach (var channel in channelsToUpdate)
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{
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await workerChannel.WriteAsync(new RefreshChannelData(channel.Number), cancellationToken);
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}
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return Option<BaseError>.None;
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}
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catch (Exception ex)
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{
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return BaseError.New("Failed to update channel numbers: " + ex.Message);
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}
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}
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}
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