public JsonResult GetBooks(FilterCriteria criteria)
{
var bookList = new List<BookModel>(); // No need to actually properly cast this as it's being returned as a json result.
if (criteria == null)
{
return Json(GetBooksFromGoogle(criteria), JsonRequestBehavior.AllowGet);
}
return Json(bookList, JsonRequestBehavior.AllowGet);
}
/// <summary>
/// based off criteria will generate a filter string to return appropriate books. If it's been run previously it will
/// apply the FilterString generated last time.
/// </summary>
private string GetGoogleJson(FilterCriteria criteria, long startIndex = 0)
{
const string googleUriBaseString =
@"https://www.googleapis.com/books/v1/volumes?q={2}&key={0}&fields=totalItems," +
@"items(id,volumeInfo(title,averageRating,authors,publishedDate,categories))&startIndex={1}&maxResults=40&orderBy=newest";
const string NULL_INPUT_CASE = "inpublisher:Chronicle";
if(criteria == null || criteria.filters.Count == 0)
return MakeGetRequest(String.Format(googleUriBaseString, API_KEY, startIndex, NULL_INPUT_CASE));
if(!String.IsNullOrWhiteSpace(FilterString))
return MakeGetRequest(String.Format(googleUriBaseString, API_KEY, startIndex, FilterString));
string title, categories, authors;
title = categories = authors = "";
float minAvgRating = 0;
foreach (var filter in criteria.filters)
{
if(filter.FilterTypes == FilterTypesEnum.Genre)
{
if(String.IsNullOrWhiteSpace(categories))
categories = filter.FilterValue;
else
categories += "," + filter.FilterValue;
}
else if(filter.FilterTypes == FilterTypesEnum.Author)
{
if(String.IsNullOrWhiteSpace(authors))
authors = filter.FilterValue;
else
authors = "," + filter.FilterValue;
}
else if (filter.FilterTypes == FilterTypesEnum.MinAvgRating)
{
CustomFilterFlag = true;
CustomMinFilterValue = float.Parse(filter.FilterValue);
}
}
string queryString = "";
if(title != null)
queryString = String.Format(SF_TITLE_QUERY, title);
if (authors != null)
queryString = String.Format(SF_AUTHOR_QUERY, authors);
if (categories != null)
queryString = String.Format(SF_CATEGORY_QUERY, categories);
queryString = queryString.TrimStart(',');
FilterString = queryString;
return MakeGetRequest(String.Format(googleUriBaseString, API_KEY, startIndex, FilterString));
}
public JsonResult GetBookData(FilterCriteria criteria)
{
//var book = new BookModel();
return Json(GetBooksFromGoogle(criteria), JsonRequestBehavior.AllowGet);
}
//private List<BookModel> GetBooksFromGoogle(FilterCriteria criteria)
private List<BookModel> GetBooksFromGoogle(FilterCriteria criteria)
{
var books = new List<BookModel>();
GoogleJsonModel jsonResult;
long count = 0;
do
{
string googJson = GetGoogleJson(criteria, count);
jsonResult = JsonConvert.DeserializeObject<GoogleJsonModel>(GetGoogleJson(criteria, count));
foreach (var result in jsonResult.items)
{
if (result.Title == null) continue; //Yes, This happened.
var newBook = new BookModel
{
Id = result.id,
Title = result.Title,
};
float averageRating = 0;
GenreTypesEnum genreType = GenreTypesEnum.All;
string author = "Unknown";
if (result.Authors != null) author = result.Authors.Length > 0 ? String.Join(",", result.Authors) : result.Authors[0];
if (result.averageRating != null) float.TryParse(result.averageRating, out averageRating);
if (result.Genres != null && result.Genres.Length > 0)
{
//newBook.GenreType = getFirstGenre(result.Genres);
newBook.Genre = String.Join(",", result.Genres);
}
newBook.Author = author;
newBook.AvgRating = averageRating;
books.Add(newBook);
}
count += jsonResult.items.Length;
//Differentiation between books.Count and count is on purpose.
} while (jsonResult != null && count < jsonResult.totalItems && books.Count < MAX_BOOK_COUNT);
return books;
}