/// <summary>
/// Refactoring method that, given user parameters, creates a custom URL link to the previous and next page.
/// </summary>
/// <param name="options">The user custom options or default options for the search, sort, filter and pagination features.</param>
/// <param name="type">One element of the enumeration to distinguish the multiple types of URLs to create.</param>
/// <returns>
/// A string that contains an URL link to the previous, the next page, or the current page by default.
/// </returns>
private string CreateResourceUri(ParaglidersSSFP options, ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetAllParaglidersAsync",
new
{
PageNumber = options.PageNumber = -1,
options.PageSize,
options.SearchBy,
options.FilterBy,
options.SortBy,
options.LastRevisionDate,
options.Name
}));
case ResourceUriType.NextPage:
return(Url.Link("GetAllParaglidersAsync",
new
{
PageNumber = options.PageNumber + 1,
options.PageSize,
options.SearchBy,
options.FilterBy,
options.SortBy,
options.LastRevisionDate,
options.Name
}));
default:
return(Url.Link("GetAllParaglidersAsync",
new
{
options.PageNumber,
options.PageSize,
options.FilterBy,
options.SortBy,
options.SearchBy,
options.LastRevisionDate,
options.Name
}));
}
}
public async Task <ActionResult <IReadOnlyCollection <ParagliderDto> > > GetAllParaglidersAsync([FromQuery] ParaglidersSSFP options)
{
var paraglider = await _paragliderService.GetAllParaglidersAsync(options);
if (paraglider == null)
{
return(NotFound("There is no paraglider "));
}
var previousPageLink = options.HasPrevious ? CreateResourceUri(options, ResourceUriType.PreviousPage) : null;
var nextPageLink = options.HasNext ? CreateResourceUri(options, ResourceUriType.NextPage) : null;
var paginationMetadata = new
{
options.TotalCount,
options.PageSize,
options.PageNumber,
options.TotalPages,
options.SearchBy,
options.DateLastRevision,
options.Name,
previousPageLink,
nextPageLink
};
Response.Headers.Add("X-Pagination", JsonSerializer.Serialize(paginationMetadata));
return(Ok(paraglider));
}
public async Task <IReadOnlyCollection <ParagliderDto> > GetAllParaglidersAsync(ParaglidersSSFP options)
{
var paragliders = _paraContext.Paragliders
.AsNoTracking()
.FilterParaglidersBy(options.FilterBy, options.CommissionDate, options.LastRevisionDate, options.ParagliderModelId)
.SearchParaglidersBy(options)
.SortParagliderBy(options.SortBy)
.Select(p => new ParagliderDto
{
ParagliderId = p.ID,
Name = p.Name,
CommissioningDate = p.CommissioningDate,
LastRevision = p.LastRevisionDate,
ParagliderModelId = p.ParagliderModel.ID,
NumerOfFlights = p.Flights.Count()
});
options.SetPagingValues(paragliders);
var pagedQuery = paragliders.Page(options.PageNumber - 1, options.PageSize);
return(await pagedQuery.ToListAsync());
}
