119 lines
4.3 KiB
C#
119 lines
4.3 KiB
C#
using ErsatzTV.Core;
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using ErsatzTV.Core.Domain;
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using ErsatzTV.Core.Domain.Scheduling;
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using ErsatzTV.Infrastructure.Data;
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using ErsatzTV.Infrastructure.Extensions;
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using Microsoft.EntityFrameworkCore;
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using static ErsatzTV.Application.Scheduling.Mapper;
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namespace ErsatzTV.Application.Scheduling;
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public class CopyBlockHandler(IDbContextFactory<TvContext> dbContextFactory)
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: IRequestHandler<CopyBlock, Either<BaseError, BlockViewModel>>
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{
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public async Task<Either<BaseError, BlockViewModel>> Handle(
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CopyBlock request,
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CancellationToken cancellationToken)
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{
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try
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{
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await using TvContext dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);
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Validation<BaseError, Block> validation = await Validate(dbContext, request, cancellationToken);
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return await validation.Apply(p => PerformCopy(dbContext, p, request, cancellationToken));
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}
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catch (Exception ex)
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{
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Console.WriteLine(ex.ToString());
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return BaseError.New(ex.Message);
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}
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}
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private static async Task<BlockViewModel> PerformCopy(
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TvContext dbContext,
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Block block,
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CopyBlock request,
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CancellationToken cancellationToken)
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{
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DetachEntity(dbContext, block);
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block.Name = request.NewBlockName;
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block.BlockGroup = null;
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block.BlockGroupId = request.NewBlockGroupId;
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foreach (BlockItem item in block.Items)
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{
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DetachEntity(dbContext, item);
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item.BlockId = 0;
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item.Block = block;
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foreach (BlockItemWatermark watermark in item.BlockItemWatermarks)
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{
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DetachEntity(dbContext, watermark);
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watermark.BlockItemId = 0;
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watermark.BlockItem = item;
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}
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foreach (BlockItemGraphicsElement graphicsElement in item.BlockItemGraphicsElements)
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{
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DetachEntity(dbContext, graphicsElement);
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graphicsElement.BlockItemId = 0;
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graphicsElement.BlockItem = item;
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}
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}
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await dbContext.Blocks.AddAsync(block, cancellationToken);
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await dbContext.BlockItems.AddRangeAsync(block.Items, cancellationToken);
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await dbContext.SaveChangesAsync(cancellationToken);
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await dbContext.Entry(block).Reference(b => b.BlockGroup).LoadAsync(cancellationToken);
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return ProjectToViewModel(block);
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}
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private static async Task<Validation<BaseError, Block>> Validate(
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TvContext dbContext,
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CopyBlock request,
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CancellationToken cancellationToken) =>
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(await BlockMustExist(dbContext, request, cancellationToken), await ValidateName(dbContext, request))
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.Apply((block, _) => block);
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private static Task<Validation<BaseError, Block>> BlockMustExist(
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TvContext dbContext,
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CopyBlock request,
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CancellationToken cancellationToken) =>
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dbContext.Blocks
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.AsNoTracking()
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.Include(ps => ps.Items)
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.ThenInclude(i => i.BlockItemWatermarks)
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.Include(ps => ps.Items)
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.ThenInclude(i => i.BlockItemGraphicsElements)
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.SelectOneAsync(p => p.Id, p => p.Id == request.BlockId, cancellationToken)
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.Map(o => o.ToValidation<BaseError>("Block does not exist."));
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private static async Task<Validation<BaseError, string>> ValidateName(TvContext dbContext, CopyBlock request)
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{
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List<string> allNames = await dbContext.Blocks
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.Where(b => b.BlockGroupId == request.NewBlockGroupId)
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.Map(ps => ps.Name)
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.ToListAsync();
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Validation<BaseError, string> result1 = request.NotEmpty(c => c.NewBlockName)
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.Bind(_ => request.NotLongerThan(50)(c => c.NewBlockName));
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var result2 = Optional(request.NewBlockName)
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.Where(name => !allNames.Contains(name))
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.ToValidation<BaseError>("Block name must be unique within the block group.");
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return (result1, result2).Apply((_, _) => request.NewBlockName);
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}
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private static void DetachEntity<T>(TvContext db, T entity) where T : class
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{
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db.Entry(entity).State = EntityState.Detached;
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if (entity.GetType().GetProperty("Id") is not null)
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{
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entity.GetType().GetProperty("Id")!.SetValue(entity, 0);
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}
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}
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}
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