public async Task <IActionResult> GetAll([FromQuery] CustomerPaginationFilter filter)
{
var route = Request.Path.Value;
var validFilter = new CustomerPaginationFilter(filter.PageNumber, filter.PageSize);
var query = context.Customers.AsQueryable();
//Search by firstname and email
if (!string.IsNullOrEmpty(filter.FirstName))
{
query = query.Where(x => x.FirstName.ToLower().Contains(filter.FirstName.ToLower()));
}
if (!string.IsNullOrEmpty(filter.Email))
{
query = query.Where(x => x.Email.ToLower().Contains(filter.Email.ToLower()));
}
var pagedData = await query.Skip((validFilter.PageNumber - 1) *validFilter.PageSize)
.Take(validFilter.PageSize).ToListAsync();
// calculate total records
var totalRecords = await query.CountAsync();
var pagedReponse = PaginationHelper.CreatePagedReponse(pagedData, validFilter, totalRecords, uriService, route);
return(Ok(pagedReponse));
}
public Uri GetPageUri(CustomerPaginationFilter filter, string route)
{
var _enpointUri = new Uri(string.Concat(_baseUri, route));
var modifiedUri = QueryHelpers.AddQueryString(_enpointUri.ToString(), "pageNumber", filter.PageNumber.ToString());
modifiedUri = QueryHelpers.AddQueryString(modifiedUri, "pageSize", filter.PageSize.ToString());
return(new Uri(modifiedUri));
}
public static PagedResponse <List <T> > CreatePagedReponse <T>(List <T> pagedData, CustomerPaginationFilter validFilter, int totalRecords, IUriService uriService, string route)
{
var respose = new PagedResponse <List <T> >(pagedData, validFilter.PageNumber, validFilter.PageSize);
var totalPages = ((double)totalRecords / (double)validFilter.PageSize);
int roundedTotalPages = Convert.ToInt32(Math.Ceiling(totalPages));
respose.NextPage =
validFilter.PageNumber >= 1 && validFilter.PageNumber < roundedTotalPages
? uriService.GetPageUri(new CustomerPaginationFilter(validFilter.PageNumber + 1, validFilter.PageSize), route)
: null;
respose.PreviousPage =
validFilter.PageNumber - 1 >= 1 && validFilter.PageNumber <= roundedTotalPages
? uriService.GetPageUri(new CustomerPaginationFilter(validFilter.PageNumber - 1, validFilter.PageSize), route)
: null;
respose.FirstPage = uriService.GetPageUri(new CustomerPaginationFilter(1, validFilter.PageSize), route);
respose.LastPage = uriService.GetPageUri(new CustomerPaginationFilter(roundedTotalPages, validFilter.PageSize), route);
respose.TotalPages = roundedTotalPages;
respose.TotalRecords = totalRecords;
return(respose);
}