/// <summary>
/// 文章过滤及搜索
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public async Task <PageList <ArticleListViewModel> > GetArticles(ArticleParameters parameters)
{
if (parameters == null)
{
throw new ArgumentNullException(nameof(parameters));
}
var resultList = _articleRepository.GetAll();
var dateTime = DateTime.Now;
//过滤条件，判断枚举是否引用
if (Enum.IsDefined(typeof(DistanceTime), parameters.DistanceTime))
{
switch (parameters.DistanceTime)
{
case DistanceTime.Week:
dateTime = dateTime.AddDays(-7);
break;
case DistanceTime.Month:
dateTime = dateTime.AddMonths(-1);
break;
case DistanceTime.Year:
dateTime = dateTime.AddYears(-1);
break;
}
resultList = resultList.Where(m => m.CreateTime > dateTime);
}
//搜索条件，暂时添加标题和内容
if (!string.IsNullOrWhiteSpace(parameters.SearchStr))
{
parameters.SearchStr = parameters.SearchStr.Trim();
resultList = resultList.Where(m =>
m.Title.Contains(parameters.SearchStr) || m.Content.Contains(parameters.SearchStr));
}
//转换为viewModel
var list = resultList.Select(m => new ArticleListViewModel
{
ArticleId = m.Id,
Title = m.Title,
Content = m.Content,
CreateTime = m.CreateTime,
Account = m.User.Account,
ProfilePhoto = m.User.ProfilePhoto
});
//排序
var mappingDictionary = _propertyMappingService.GetPropertyMapping <ArticleListViewModel, Article>();
list = list.ApplySort(parameters.Orderby, mappingDictionary);
return(await PageList <ArticleListViewModel> .CreatePageMsgAsync(list, parameters.PageNumber, parameters.PageSize));
}