public static AsyncPageable <T> CreateAsyncEnumerable <T>(Func <int?, Task <Page <T> > > firstPageFunc, Func <string?, int?, Task <Page <T> > >?nextPageFunc, int?pageSize = default) where T : notnull
{
AsyncPageFunc <T> first = (continuationToken, pageSizeHint) => firstPageFunc(pageSizeHint);
AsyncPageFunc <T>?next = nextPageFunc != null ? new AsyncPageFunc <T>(nextPageFunc) : null;
return(new FuncAsyncPageable <T>(first, next, pageSize));
}
public override async IAsyncEnumerable <Page <T> > AsPages(string?continuationToken = default, int?pageSizeHint = default)
{
AsyncPageFunc <T> pageFunc = _firstPageFunc;
int?pageSize = pageSizeHint ?? _defaultPageSize;
do
{
Page <T> pageResponse = await pageFunc(continuationToken, pageSize).ConfigureAwait(false);
yield return(pageResponse);
continuationToken = pageResponse.ContinuationToken;
pageFunc = _nextPageFunc;
} while (continuationToken != null);
}
public override async IAsyncEnumerable <Page <T> > AsPages(string?continuationToken = default, int?pageSizeHint = default)
{
AsyncPageFunc <T>?pageFunc = string.IsNullOrEmpty(continuationToken) ? _firstPageFunc : _nextPageFunc;
if (pageFunc == null)
{
yield break;
}
int?pageSize = pageSizeHint ?? _defaultPageSize;
do
{
Page <T> pageResponse = await pageFunc(continuationToken, pageSize).ConfigureAwait(false);
yield return(pageResponse);
continuationToken = pageResponse.ContinuationToken;
pageFunc = _nextPageFunc;
} while (!string.IsNullOrEmpty(continuationToken) && pageFunc != null);
}
public FuncAsyncPageable(AsyncPageFunc <T> firstPageFunc, AsyncPageFunc <T> nextPageFunc, int?defaultPageSize = default)
{
_firstPageFunc = firstPageFunc;
_nextPageFunc = nextPageFunc;
_defaultPageSize = defaultPageSize;
}