/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public OpdsItems GetItems(OpdsData data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
return(new OpdsItems {
Items = ConvertDataItems(data)
});
}
private SyndicationItem BuildEntity(OpdsData data, IPropertyAccessor accessor, object item, bool withDetail)
{
var syndicationItem = CreateBasicDataItems(accessor, item);
// 详细页
if (withDetail)
{
// 购买链接
var buyLink = LinkGenerator.Generate(item, OpdsRelations.Buy, null, accessor, Names);
if (buyLink != null)
{
buyLink.Prices.Single().CurrencyCode = item.GetProperty(Names.CurrencyCode, accessor).ToNullableString() ?? "CNY";
syndicationItem.Links.Add(buyLink);
}
// 下载链接
var downloadLink = LinkGenerator.Generate(item, OpdsRelations.OpenAcquisition, null, accessor, Names);
if (downloadLink != null)
{
downloadLink.MediaType = item.GetProperty(Names.MimeType, accessor).ToNullableString();
downloadLink.Length = Convert.ToInt64(item.GetProperty(Names.Size, accessor));
downloadLink.Uri = new Uri(item.GetProperty(Names.DownloadAddress, accessor).ToNullableString() ?? downloadLink.Uri.ToString(), UriKind.RelativeOrAbsolute);
syndicationItem.Links.Add(downloadLink);
}
// 其它详细信息
syndicationItem.Content = item.GetProperty(Names.Content, accessor).MakeSyndicationContent();
syndicationItem.Copyright = item.GetProperty(Names.Copyright, accessor).MakeSyndicationContent();
syndicationItem.ISBN = item.GetProperty(Names.Isbn, accessor).ToNullableString();
syndicationItem.Language = item.GetProperty(Names.Language, accessor).ToNullableString();
syndicationItem.Issued = item.GetProperty(Names.IssueTime, accessor).ToNullableString();
syndicationItem.Extent = item.GetProperty(Names.Extent, accessor).ToNullableString();
var relevance = item.GetProperty(Names.Relevance, accessor);
if (relevance != null)
{
syndicationItem.Relevance = Convert.ToDouble(relevance);
}
var publishDate = item.GetProperty(Names.PublishDate, accessor);
if (publishDate != null && (DateTime)publishDate != DateTime.MinValue)
{
syndicationItem.PublishDate = new DateTimeOffset(Convert.ToDateTime(publishDate));
}
var categories = item.GetProperty(Names.CategoryInfo, accessor);
if (categories != null)
{
if (categories is string)
{
syndicationItem.Categories.Add(new SyndicationCategory(categories as string));
}
else if (categories is IEnumerable)
{
foreach (var category in categories as IEnumerable)
{
FillInCategoryInfo(syndicationItem, category);
}
}
else
{
FillInCategoryInfo(syndicationItem, categories);
}
}
else
{
FillInCategoryInfo(syndicationItem, item, accessor, Names.CategoryPrefix);
}
ExtracPersonInfo(item, syndicationItem.Contributors, Names.ContributorPrefix, accessor);
}
// 书籍列表页需要有详细页链接
// 是否有详细页链接，与是否显示详细信息没有直接关系。
if (data.MediaType == OpdsMediaType.AcquisitionFeed)
{
var detailLink = LinkGenerator.Generate(item, OpdsRelations.Alternate, OpdsMediaType.Entry, accessor, Names);
if (detailLink != null)
{
syndicationItem.Links.Add(detailLink);
}
else
{
throw new InvalidProgramException("LinkGenerator don't provide detail link");
}
}
// 图片链接
var thumbnail = item.GetProperty(Names.Thumbnail, accessor).ToNullableString();
if (thumbnail != null)
{
syndicationItem.Links.Add(new SyndicationLink
{
Uri = new Uri(thumbnail),
RelationshipType = OpdsRelations.Thumbnail,
});
}
var cover = item.GetProperty(Names.Cover, accessor).ToNullableString();
if (cover != null)
{
syndicationItem.Links.Add(new SyndicationLink
{
Uri = new Uri(cover),
RelationshipType = OpdsRelations.Cover,
});
}
syndicationItem.Publisher = item.GetProperty(Names.Publisher, accessor).ToNullableString();
syndicationItem.Source = item.GetProperty(Names.Source, accessor).ToNullableString();
OnSyndicationItemCreated(syndicationItem, item);
return(syndicationItem);
}
private IEnumerable <KeyValuePair <object, SyndicationItem> > ConvertDataItems(OpdsData data)
{
// Assuming every item is of different type.
// PropertyAdapter should be retreived for every item.
foreach (var item in data.Data ?? new IOpdsDataTypeHost[] { })
{
var accessor = AccessorFactory.GetAccessor(item);
var dataType = TypeDetector.DetectType(item);
if (dataType == OpdsDataType.Category)
{
var syndicationItem = CreateBasicDataItems(accessor, item);
var navigationLink = LinkGenerator.Generate(item, OpdsRelations.Alternate, OpdsMediaType.NavigationFeed, accessor, Names);
if (navigationLink != null)
{
var count = item.GetProperty(Names.Count, accessor);
if (count != null)
{
navigationLink.Count = Convert.ToInt32(count);
}
syndicationItem.Links.Add(navigationLink);
}
OnSyndicationItemCreated(syndicationItem, item);
yield return(new KeyValuePair <object, SyndicationItem>(item, syndicationItem));
}
else
{
yield return(new KeyValuePair <object, SyndicationItem>(item, BuildEntity(data, accessor, item, dataType == OpdsDataType.Detial)));
}
}
}
