Gremlin/Gremlin_BlazorServer/Services/GenericController.cs

using Gremlin_BlazorServer.Data.DBClasses;
using Gremlin_BlazorServer.Data.EntityClasses;
using Microsoft.EntityFrameworkCore;

namespace Gremlin_BlazorServer.Services;

public class GenericController
{
	private readonly GremlinDb gremlinDb = new();

	public IList<TResult>? GetAll<TResult>() where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().ToList();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public IList<TResult>? GetAll<TResult>(string include) where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().Include(include).ToList();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public IList<TResult>? GetAll<TResult>(Predicate<TResult> search) where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().AsEnumerable().Where(t => search(t)).ToList();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public IList<TResult>? GetAll<TResult>(Predicate<TResult> search, string include) where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().Include(include).AsEnumerable().Where(t => search(t)).ToList();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public TResult? Get<TResult>(Predicate<TResult> search) where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().AsEnumerable().FirstOrDefault(t => search(t));
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public TResult? Get<TResult>(Predicate<TResult> search, string include) where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().Include(include).AsEnumerable().FirstOrDefault(t => search(t));
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public TResult? GetLast<TResult>() where TResult : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<TResult>().AsEnumerable().Last();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return null;
		}
	}

	public int Insert<T>(T entity) where T : class, IMetadata
	{
		try
		{
			_ = gremlinDb.Set<T>().Add(entity);
			return gremlinDb.SaveChanges();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return 0;
		}
	}

	public int Insert<T>(List<T> entities) where T : class, IMetadata
	{
		try
		{
			gremlinDb.Set<T>().AddRange(entities);
			return gremlinDb.SaveChanges();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return 0;
		}
	}

	public bool IsExisting<T>(Predicate<T> search) where T : class, IMetadata
	{
		try
		{
			return gremlinDb.Set<T>().AsEnumerable().Any(t => search(t));
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return false;
		}
	}

	public int Update<T>(T entity) where T : class, IMetadata
	{
		try
		{
			_ = gremlinDb.Set<T>().Update(entity);
			return gremlinDb.SaveChanges();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return 0;
		}
	}

	public int Update<T>(List<T> entities) where T : class, IMetadata
	{
		try
		{
			gremlinDb.Set<T>().UpdateRange(entities);
			return gremlinDb.SaveChanges();
		}
		catch (Exception exception)
		{
			Console.WriteLine(exception.InnerException);
			return 0;
		}
	}
}