public PagingLinks BuildPagingLinks(IPaginationTemplate paginationTemplate, ILink selfLink, int?totalResults)
{
if (!(selfLink is PageLink pageLink))
{
return(null);
}
if (paginationTemplate == null || !totalResults.HasValue)
{
return(null);
}
pageLink.Sort = paginationTemplate.Sort;
pageLink.PageOffset = paginationTemplate.PageOffset;
pageLink.PageSize = paginationTemplate.PageSize;
pageLink.QueryParams = _getAdditionalParams(paginationTemplate);
PagingLinks links = new PagingLinks();
if (paginationTemplate.PageOffset != 0)
{
links.First = _pageLink(LinkType.FirstPage, pageLink.Uri, paginationTemplate, 0);
links.Previous = _pageLink(LinkType.PreviousPage, pageLink.Uri, paginationTemplate, Math.Max(0, paginationTemplate.PageOffset - paginationTemplate.PageSize));
}
if (paginationTemplate.PageOffset + paginationTemplate.PageSize < totalResults)
{
links.Next = _pageLink(LinkType.NextPage, pageLink.Uri, paginationTemplate, paginationTemplate.PageOffset + paginationTemplate.PageSize);
links.Last = _pageLink(LinkType.LastPage, pageLink.Uri, paginationTemplate, totalResults.Value - paginationTemplate.PageSize);
}
return(links);
}
private PageLink _pageLink(string linkType, string pageLinkUri, IPaginationTemplate paginationTemplate, int pageOffset)
{
return(new PageLink
{
Uri = pageLinkUri,
Name = linkType,
AllowVerbs = HttpVerb.Get,
Sort = paginationTemplate.Sort,
PageOffset = pageOffset,
PageSize = paginationTemplate.PageSize,
QueryParams = _getAdditionalParams(paginationTemplate)
});
}
private IDictionary <string, object> _getAdditionalParams(IPaginationTemplate paginationTemplate)
{
DictionaryBuilder <string, object> dictionaryBuilder = DictionaryBuilder <string, object> .Create();
List <string> handledProperties = new List <string>
{
nameof(paginationTemplate.PageSize),
nameof(paginationTemplate.PageOffset),
nameof(paginationTemplate.Sort)
};
foreach (PropertyInfo propertyInfo in paginationTemplate.GetType().GetProperties().Where(p => !handledProperties.Contains(p.Name)))
{
dictionaryBuilder.Add(propertyInfo.Name, propertyInfo.GetValue(paginationTemplate));
}
return(dictionaryBuilder.Build());
}
public PageLink BuildLink(string name, string uri, IPaginationTemplate paginationTemplate)
{
return(_pageLink(name, uri, paginationTemplate, paginationTemplate.PageOffset));
}