/// <summary>
/// Build a query to ITunes API,
/// Parse The result and add paging logic
/// </summary>
/// <param name="searchParam"> meta data for the search, such as term and page number</param>
/// <returns>Search Results with paging</returns>
public async Task <PagedSearchResponse <ITunesItem> > SearchAsync(PagedSearchParams searchParam)
{
try
{
var url = new TunesUrlBuilder(BaseUrl)
.AddEndpoint("Search")
.AddOutput(searchParam.Output)
.AddMedia(searchParam.Media)
.AddResultEntity(searchParam.ResultEntity)
.AddLimit(searchParam.Limit)
.AddTerm(searchParam.Term)
.GetUrl();
var httpResponse = await _client.GetAsync(url);
//Itunes API error (probably wrong type sent)
if (!httpResponse.IsSuccessStatusCode)
{
return(new PagedSearchResponse <ITunesItem>()
{
ErrorMessage = "An Error Occured when trying to fetch data",
ResultCount = 0,
Success = false,
Results = PagedList <ITunesItem> .Create(new ITunesItem[0], 0, 0)
});
}
var content = await httpResponse.Content.ReadAsStringAsync();
var response = JsonConvert.DeserializeObject <SearchResponse <ITunesItem> >(content);
response.Success = true;
var res = MapResponseToPaged(response, searchParam);
return(res);
}
catch (Exception e)
{
_log.LogError(e, $"Internal Error when Searching for an item : {searchParam.Term}");
return(new PagedSearchResponse <ITunesItem>()
{
ErrorMessage = $"A Server Error Occured when trying to SearchAsync Item : {searchParam.Term}",
ResultCount = 0,
Success = false,
Results = PagedList <ITunesItem> .Create(new ITunesItem[0], 0, 0)
});
}
}
/// <summary>
/// Parse a result from a ITunes API Model to a paging model
/// to allow paging and fast Retrieval
/// </summary>
/// <param name="response">should be response from ITunes API</param>
/// <param name="searchParam"> would supply the paging meta data</param>
/// <returns> a final Paged Search Response item</returns>
public PagedSearchResponse <ITunesItem> MapResponseToPaged(SearchResponse <ITunesItem> response, PagedSearchParams searchParam)
{
var res = _mapper.Map <PagedSearchResponse <ITunesItem> >(response);
res.Results = PagedList <ITunesItem> .Create(response.Results, searchParam.PageNumber, searchParam.PageSize);
res.TotalCount = response.Results.Count;
res.PageSize = searchParam.PageSize;
res.CurrentPage = searchParam.PageNumber;
res.TotalPages = (int)Math.Ceiling(res.TotalCount / (double)res.PageSize);
return(res);
}
