protected async Task EnsurePagingConfig(PagingPath paging, CancellationToken cancellationToken = default)
{
if (paging.Config != null)
{
return;
}
using var fs = await GetFileReadStream(paging.ConfigPath);
paging.Config = await JsonSerializer.DeserializeAsync <PagingConfig>(fs, cancellationToken : cancellationToken);
}
protected async Task <IList <TId> > GetPagingResult(PagingPath paging, Pagination pagination, CancellationToken cancellationToken = default)
{
IList <TId> result = Array.Empty <TId>();
var path = paging.GetPagePath(pagination);
if (path != null)
{
using var fs = await GetFileReadStream(path, cancellationToken);
result = await JsonSerializer.DeserializeAsync <IList <TId> >(fs, cancellationToken : cancellationToken);
}
return(result);
}
public override async Task <QueryResponse <string> > Query(PostQueryRequest query, CancellationToken cancellationToken = default)
{
query.Pagination ??= new Pagination();
PagingPath?paging = null;
if (query.Type != null)
{
switch (query.Type)
{
case PostType.Article:
paging = new PagingPath(Path.Join(RootPath, "articles"));
break;
case PostType.Slides:
paging = new PagingPath(Path.Join(RootPath, "slides"));
break;
case PostType.Note:
paging = new PagingPath(Path.Join(RootPath, "notes"));
break;
}
}
else if (!string.IsNullOrWhiteSpace(query.CategoryId))
{
var catRoot = Path.Join(RootPath, "categories");
paging = new PagingPath(Path.Join(catRoot, query.CategoryId));
}
else if (!string.IsNullOrWhiteSpace(query.KeywordId))
{
var catRoot = Path.Join(RootPath, "keywords");
paging = new PagingPath(Path.Join(catRoot, query.KeywordId));
}
paging ??= new PagingPath(Path.Join(RootPath, "pages"));
await EnsurePagingConfig(paging);
paging.FillPagination(query.Pagination);
var res = new QueryResponse <string>(await GetPagingResult(paging, query.Pagination, cancellationToken), query.Pagination);
return(res);
}
