public PagedList <Event> GetEvents(EventsResourceParameters eventsResourceParameters)
{
if (eventsResourceParameters == null)
{
throw new ArgumentNullException(nameof(eventsResourceParameters));
}
IQueryable <Event> events = _dataContext.Events as IQueryable <Event>;
if (!string.IsNullOrWhiteSpace(eventsResourceParameters.Name))
{
var name = eventsResourceParameters.Name.Trim();
events = events.Where(x => x.Name == name);
}
if (!string.IsNullOrWhiteSpace(eventsResourceParameters.SearchQuery))
{
var searchQuery = eventsResourceParameters.SearchQuery.Trim();
events = events.Where(x => x.Name.Contains(searchQuery) ||
x.Purpose.Contains(searchQuery) ||
x.Note.Contains(searchQuery));
}
if (!string.IsNullOrWhiteSpace(eventsResourceParameters.OrderBy))
{
var eventPropertyMappingDictionary = _propertyMappingService.GetPropertyMapping <EventDto, Event> ();
events = events.ApplySort(eventsResourceParameters.OrderBy, eventPropertyMappingDictionary);
}
return(PagedList <Event> .Create(events, eventsResourceParameters.PageNumber, eventsResourceParameters.PageSize));
}
public IActionResult GetEvents([FromQuery] EventsResourceParameters eventsResourceParameters, [FromHeader(Name = "Accept")] string mediaType)
{
if (!MediaTypeHeaderValue.TryParse(mediaType, out MediaTypeHeaderValue parsedMediaType))
{
return(BadRequest(new
{
message = "Accept header mediaType is not allowed"
}));
}
if (!_propertyMappingService.ValidMappingExistsFor <EventDto, Event> (eventsResourceParameters.OrderBy))
{
return(BadRequest());
}
if (!_propertyCheckerService.TypeHasProperties <EventDto> (eventsResourceParameters.Fields))
{
return(BadRequest());
}
var events = _eventRepository.GetEvents(eventsResourceParameters);
var paginationMetadata = new
{
totalCount = events.TotalCount,
pageSize = events.PageSize,
currentPage = events.CurrentPage,
totalPages = events.TotalPages
};
Response.Headers.Add("X-Pagination", JsonSerializer.Serialize(paginationMetadata));
var links = CreateLinksForEvents(eventsResourceParameters, events.HasNext, events.HasPrevious);
var shapeEvents = _mapper.Map <IEnumerable <EventDto> > (events).ShapeData(eventsResourceParameters.Fields);
if (parsedMediaType.MediaType == "application/vnd.marvin.hateoas+json")
{
var shapeEventsWithLinks = shapeEvents.Select(evt =>
{
var eventAsDictionary = evt as IDictionary <string, object>;
var eventLinks = CreateLinksForEvent((Guid)eventAsDictionary["Id"], null);
eventAsDictionary.Add("links", eventLinks);
return(eventAsDictionary);
});
var linkedCollectionResource = new
{
value = shapeEventsWithLinks,
links,
};
return(Ok(linkedCollectionResource));
}
return(Ok(shapeEvents));
}
private string CreateEventResourceUri(EventsResourceParameters eventsResourceParameters, ResourceUriType type)
{
switch (type)
{
case ResourceUriType.PreviousPage:
return(Url.Link("GetEvents", new
{
fields = eventsResourceParameters.Fields,
orderBy = eventsResourceParameters.OrderBy,
pageNumber = eventsResourceParameters.PageNumber - 1,
pageSize = eventsResourceParameters.PageSize,
name = eventsResourceParameters.Name,
searchQuery = eventsResourceParameters.SearchQuery
}));
case ResourceUriType.NextPage:
return(Url.Link("GetEvents", new
{
fields = eventsResourceParameters.Fields,
orderBy = eventsResourceParameters.OrderBy,
pageNumber = eventsResourceParameters.PageNumber + 1,
pageSize = eventsResourceParameters.PageSize,
name = eventsResourceParameters.Name,
searchQuery = eventsResourceParameters.SearchQuery
}));
case ResourceUriType.Current:
default:
return(Url.Link("GetEvents", new
{
fields = eventsResourceParameters.Fields,
orderBy = eventsResourceParameters.OrderBy,
pageNumber = eventsResourceParameters.PageNumber,
pageSize = eventsResourceParameters.PageSize,
name = eventsResourceParameters.Name,
searchQuery = eventsResourceParameters.SearchQuery
}));
}
}
private IEnumerable <LinkDto> CreateLinksForEvents(EventsResourceParameters eventsResourceParameters, bool hasNext, bool hasPrevious)
{
var links = new List <LinkDto> ();
// self
links.Add(
new LinkDto(CreateEventResourceUri(
eventsResourceParameters, ResourceUriType.Current), "self", "GET"));
if (hasNext)
{
links.Add(
new LinkDto(CreateEventResourceUri(eventsResourceParameters, ResourceUriType.NextPage),
"nextPage", "GET"));
}
if (hasPrevious)
{
links.Add(
new LinkDto(CreateEventResourceUri(eventsResourceParameters, ResourceUriType.PreviousPage),
"previousPage", "GET"));
}
return(links);
}
