public PagedList<Movie> GetPagedList(MovieFilter filter = null)
{
PagedList<Movie> result;
if (filter == null)
{
filter = new MovieFilter();
}
_logProvider.LogDebug("Enter MoviesService.GetPagedList() with filter : " + filter);
if (filter.SortBy.IsNotNullOrEmpty() && filter.SortBy.Equals(NotSortableAttribute))
{
throw new ArgumentException(NotSortableAttribute + " is not a sortable attribute");
}
try
{
// Get the cache key based on filter parameters
var cacheKey = GetCacheKey(filter);
var filteredMovies = _cacheProvider.GetCacheValue<List<Movie>>(cacheKey);
if (filteredMovies == null)
{
var allMovies = GetAllMovies();
var searchText = filter.SearchText;
if (searchText.IsNotNullOrEmpty() && filter.SearchBy.IsNotNullOrEmpty())
{
// Search by a property
filteredMovies = SearchByProperty(
allMovies,
filter.SearchBy,
searchText,
filter.IsCaseSensitive).ToList();
}
else
{
// Search across all properties
filteredMovies = allMovies
.Where(m => searchText.IsNullOrEmpty() // if SearchText is empty, no filter apply
|| m.MovieId.ToString() == searchText
|| m.Title.Contains(searchText, filter.IsCaseSensitive)
|| m.Classification.Contains(searchText, filter.IsCaseSensitive)
|| m.Genre.Contains(searchText)
|| filter.SearchText == m.Rating.ToString()
|| filter.SearchText == m.ReleaseDate.ToString())
.ToList();
}
_cacheProvider.SetCacheValue(
cacheKey,
filteredMovies,
null,
new TimeSpan(0, MovieDataCacheExpirationInHours, 0, 0));
}
result = Pager.Paginate(filteredMovies, new PagerSettings
{
PageNumber = filter.CurrentPageIndex,
PageSize = filter.PageSize,
SortBy = filter.SortBy,
SortDirection = filter.SortOrder,
Paginate = true
});
}
catch (Exception e)
{
_logProvider.LogException(e);
throw new MoviesServiceException(e.Message);
}
return result;
}
// Construct a cache key based on filter parameters
private string GetCacheKey(MovieFilter filter)
{
return string.Format("{0}.SearchBy={1}.SearchText={2}.IsCaseSensitive={3}", BaseMovieDataCacheKey, filter.SearchBy, filter.SearchText, filter.IsCaseSensitive);
}