53 lines
1.9 KiB
C#
53 lines
1.9 KiB
C#
namespace AcdiuTools.Services
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{
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/// <summary>
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/// 主题服务实现
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/// 使用 Cookie 作为持久化机制示例，实际项目中可替换为数据库
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/// </summary>
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public class ThemeService(IHttpContextAccessor httpContextAccessor) : IThemeService
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{
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private const string DefaultTheme = "light";
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private const string ThemeCookieName = "UserThemePreference";
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private readonly IHttpContextAccessor _httpContextAccessor = httpContextAccessor;
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/// <summary>
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/// 获取当前用户的主题配置
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/// 优先级: Cookie > 默认值
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/// </summary>
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public Task<string> GetUserThemeAsync()
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{
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var context = _httpContextAccessor.HttpContext;
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if (context != null && context.Request.Cookies.TryGetValue(ThemeCookieName, out var theme))
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{
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return Task.FromResult(theme);
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}
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// 这里可以扩展为查询数据库中的用户配置
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return Task.FromResult(DefaultTheme);
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}
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/// <summary>
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/// 保存用户的主题偏好到 Cookie
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/// </summary>
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public Task<bool> SaveUserThemeAsync(string userId, string theme)
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{
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var context = _httpContextAccessor.HttpContext;
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if (context == null) return Task.FromResult(false);
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var cookieOptions = new CookieOptions
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{
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Expires = DateTimeOffset.UtcNow.AddYears(1),
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IsEssential = true,
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HttpOnly = false, // 允许 JS 读取，以便前端立即应用样式
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Secure = context.Request.IsHttps
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};
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context.Response.Cookies.Append(ThemeCookieName, theme, cookieOptions);
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// 如果已登录，此处应同时更新数据库中的用户配置
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// await _userRepository.UpdateThemeAsync(userId, theme);
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return Task.FromResult(true);
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}
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}
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} |