public IActionResult GetTopics(TopicsResourceParameters topicsResourceParameters)
{
var topicEntities = noterRepository.GetTopics(topicsResourceParameters);
var previousPageLink = topicEntities.HasPrevious ?
CreateTopicsResourceUri(topicsResourceParameters, ResourceUriType.PreviousPage)
: null;
var nextPageLink = topicEntities.HasNext ?
CreateTopicsResourceUri(topicsResourceParameters, ResourceUriType.NextPage)
: null;
var paginationMetadata = new
{
totalCount = topicEntities.TotalCount,
pageSize = topicEntities.PageSize,
currentPage = topicEntities.CurrentPage,
totalPages = topicEntities.TotalPages,
previousPage = previousPageLink,
nextPage = nextPageLink
};
Response.Headers.Add("X-Pagination", JsonConvert.SerializeObject(paginationMetadata));
var topicDtos = Mapper.Map <IEnumerable <TopicDto> >(topicEntities);
return(Ok(topicDtos));
}
private string CreateTopicsResourceUri(TopicsResourceParameters topicsResourceParameters, ResourceUriType resourceUriType)
{
switch (resourceUriType)
{
case ResourceUriType.PreviousPage: return(urlHelper.Link("GetTopics",
new
{
searchTitle = topicsResourceParameters.SearchTitle,
pageNumber = topicsResourceParameters.PageNumber - 1,
pageSize = topicsResourceParameters.PageSize
}));
case ResourceUriType.NextPage: return(urlHelper.Link("GetTopics",
new
{
searchTitle = topicsResourceParameters.SearchTitle,
pageNumber = topicsResourceParameters.PageNumber + 1,
pageSize = topicsResourceParameters.PageSize
}));
default:
return(urlHelper.Link("GetTopics",
new
{
searchTitle = topicsResourceParameters.SearchTitle,
pageNumber = topicsResourceParameters.PageNumber,
pageSize = topicsResourceParameters.PageSize
}));
}
}
public PagedList <Topic> GetTopics(TopicsResourceParameters topicsResourceParameters)
{
IQueryable <Topic> query;
if (!string.IsNullOrEmpty(topicsResourceParameters.SearchTitle))
{
query = context.Topics
.Where(e => e.IsPage == false && e.Title.Contains(topicsResourceParameters.SearchTitle))
.Include(e => e.Commentaries);
}
else
{
query = context.Topics
.Where(e => e.IsPage == false)
.Include(e => e.Commentaries);
}
return(PagedList <Topic> .Create(query, topicsResourceParameters.PageNumber, topicsResourceParameters.PageSize));
}