39 lines
1.3 KiB
C#
39 lines
1.3 KiB
C#
using System.Collections.Concurrent;
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using System.Diagnostics.CodeAnalysis;
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using Microsoft.EntityFrameworkCore;
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using OliverBooth.Data.Blog;
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namespace OliverBooth.Services;
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/// <summary>
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/// Represents an implementation of <see cref="IBlogUserService" />.
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/// </summary>
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internal sealed class BlogUserService : IBlogUserService
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{
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private readonly IDbContextFactory<BlogContext> _dbContextFactory;
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private readonly ConcurrentDictionary<Guid, IUser> _userCache = new();
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/// <summary>
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/// Initializes a new instance of the <see cref="BlogUserService" /> class.
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/// </summary>
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/// <param name="dbContextFactory">
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/// The <see cref="IDbContextFactory{TContext}" /> used to create a <see cref="BlogContext" />.
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/// </param>
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public BlogUserService(IDbContextFactory<BlogContext> dbContextFactory)
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{
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_dbContextFactory = dbContextFactory;
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}
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/// <inheritdoc />
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public bool TryGetUser(Guid id, [NotNullWhen(true)] out IUser? user)
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{
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if (_userCache.TryGetValue(id, out user)) return true;
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using BlogContext context = _dbContextFactory.CreateDbContext();
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user = context.Users.Find(id);
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if (user is not null) _userCache.TryAdd(id, user);
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return user is not null;
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}
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}
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