public void AddUpdateRating(int videoId, Guid userId, int rating)
{
if (!ValidateVideoID(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID or this video has been removed from library");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
if (rating < 1 || rating > 5)
{
throw new Exception("Rating must be between 1 and 5");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
var movieRating = new Rating()
{
VideoId = videoId,
UserId = userId,
Rating1 = rating
};
context.Entry(movieRating).State = (context.Ratings.Any(r => r.VideoId == videoId && r.UserId == userId)) ? EntityState.Modified : EntityState.Added;
context.SaveChanges();
}
}
public void DeleteVideo(int videoId, Guid userId)
{
if (!ValidateVideoID(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID or this video has been removed from library");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
if (!IsUserAdmin(userId))
{
throw new Exception("You cannot add or update video record because you are not an administraor");
}
if (HasPendingCheckouts(videoId))
{
throw new Exception("You cannot delete video recored because there are pending check outs");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
var moiveVideo = context.Videos.Find(videoId);
moiveVideo.IsDeleted = true;
context.SaveChanges();
}
}
public int AddReview(int videoId, Guid userId, string reviewText)
{
if (!ValidateVideoID(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID or this video has been removed from library");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
if (String.IsNullOrEmpty(reviewText))
{
throw new Exception("Review text cannot be empty!");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
var review = new Review()
{
VideoId = videoId,
UserId = userId,
Review1 = reviewText
};
context.Reviews.Add(review);
context.SaveChanges();
return(review.ReviewId);
}
}
public void CheckInVideo(int videoId, Guid userId)
{
if (!ValidateVideoID(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID or this video has been removed from library");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
//check if user has already checked out this video
if (!context.Checkouts.Any(c => c.UserId == userId && c.VideoId == videoId && c.ReturnDate == null))
{
throw new Exception("You do not have this video!");
}
var checkout = context.Checkouts.OrderByDescending(c => c.CheckoutDate).First(c => c.UserId == userId && c.VideoId == videoId && c.ReturnDate == null);
checkout.ReturnDate = DateTime.Now;
var video = context.Videos.First(v => v.VideoId == videoId);
video.TotalCopies++;
context.SaveChanges();
}
}
private bool ValidateUserID(Guid userID)
{
bool isValidUserID = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
isValidUserID = context.Users.Any(u => u.UserId == userID);
}
return(isValidUserID);
}
private bool IsVideoIDExist(int videoID)
{
bool isValidVideoID = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
isValidVideoID = context.Videos.Any(v => v.VideoId == videoID);
}
return(isValidVideoID);
}
private bool ValidateVideoID(int videoID)
{
bool isValidVideoID = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
isValidVideoID = context.Videos.Any(v => v.VideoId == videoID && v.IsDeleted == false);
}
return(isValidVideoID);
}
public int AddUpdateVideo(VideoInfo video, Guid userId)
{
int videoId = video.VideoId;
int year = video.Year;
int totalCopies = video.TotalCopies;
if (videoId != 0 && !IsVideoIDExist(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID ");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
if (!video.HasTitle || !video.HasDirector || year <= 0)
{
throw new Exception("Cannot update or create video record. This could be due to invalid title, director or year");
}
if (totalCopies < 0)
{
throw new Exception("Total copies cannot be negative");
}
if (!IsUserAdmin(userId))
{
throw new Exception("You cannot add or update video record because you are not an administraor");
}
if (video.Format == VideoFormat.Unknown)
{
throw new Exception("Video format cannot be empty");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
var movieVideo = new Video()
{
VideoId = videoId,
Title = video.Title,
Director = video.Director,
Year = video.Year,
TotalCopies = video.TotalCopies,
FormatCode = TranslateVideoFormatToFormatCode(video.Format)
};
context.Entry(movieVideo).State = videoId == 0 ? EntityState.Added : EntityState.Modified;
context.SaveChanges();
return(movieVideo.VideoId);
}
}
private bool HasPendingCheckouts(int videoID)
{
bool hasPendingCheckouts = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
if (context.Checkouts.Any(c => c.VideoId == videoID && c.ReturnDate == null))
{
hasPendingCheckouts = true;
}
}
return(hasPendingCheckouts);
}
private bool IsUserAdmin(Guid userID)
{
bool isUserAdmin = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
if (context.Users.First(u => u.UserId == userID).UserName == "Admin")
{
isUserAdmin = true;
}
}
return(isUserAdmin);
}
private bool ValidateReviewID(int reviewID)
{
bool isValidReviewID = false;
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
if (context.Reviews.Any(r => r.ReviewId == reviewID))
{
isValidReviewID = true;
}
}
return(isValidReviewID);
}
public void UpdateReview(int reviewId, string reviewText)
{
if (!ValidateReviewID(reviewId))
{
throw new Exception("Cannot find the review. This could be due to wrong review ID");
}
if (string.IsNullOrEmpty(reviewText))
{
throw new Exception("Review text cannot be empty!");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
var review = context.Reviews.First(r => r.ReviewId == reviewId);
review.Review1 = reviewText;
context.SaveChanges();
}
}
public void CheckOutVideo(int videoId, Guid userId)
{
if (!ValidateVideoID(videoId))
{
throw new Exception("Cannot find the video. This could be due to wrong video ID or this video has been removed from library");
}
if (!ValidateUserID(userId))
{
throw new Exception("Cannot find the user. This could be due to wrong user ID");
}
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
//check if all videos have been checked out
if (context.Videos.First(v => v.VideoId == videoId).TotalCopies < 1)
{
throw new Exception("All copies for this video have been checked out!");
}
//check if user has already checked out this video
if (context.Checkouts.Count(c => c.UserId == userId && c.VideoId == videoId && c.ReturnDate == null) != 0)
{
throw new Exception("You have already checked out this video!");
}
var video = context.Videos.Find(videoId);
video.TotalCopies--;
var checkout = new Checkout()
{
VideoId = videoId,
UserId = userId,
CheckoutDate = DateTime.Now
};
context.Checkouts.Add(checkout);
context.SaveChanges();
}
}
public Collection <VideoSearchResult> SearchVideoLibrary(VideoSearchCriteria criteria)
{
var results = new Collection <VideoSearchResult>();
using (var context = new VideoLibraryDLEFImplementation.VideoLibrary())
{
IQueryable <Video> query;
if (CheckEmptyCriteria(criteria))
{
query = from v in context.Videos
where !v.IsDeleted
select v;
}
else if (criteria.HasOneSearchCriteria())
{
if (criteria.HasTitle)
{
query = from v in context.Videos
where !v.IsDeleted && v.Title.Contains(criteria.Title)
select v;
}
else if (criteria.HasDirector)
{
query = from v in context.Videos
where !v.IsDeleted && v.Director.Contains(criteria.Director)
select v;
}
else
{
query = from v in context.Videos
where !v.IsDeleted && v.Year == criteria.Year
select v;
}
}
else
{
if (criteria.TitleBlank())
{
query = from v in context.Videos
where !v.IsDeleted && v.Director.Contains(criteria.Director) && v.Year == criteria.Year
select v;
}
else if (criteria.DirectorBlank())
{
query = from v in context.Videos
where !v.IsDeleted && v.Title.Contains(criteria.Title) && v.Year == criteria.Year
select v;
}
else if (!criteria.YearIsPostive())
{
query = from v in context.Videos
where !v.IsDeleted && v.Title.Contains(criteria.Title) && v.Director.Contains(criteria.Director)
select v;
}
else
{
query = from v in context.Videos
where !v.IsDeleted && v.Title.Contains(criteria.Title) && v.Director.Contains(criteria.Director) && v.Year == criteria.Year
select v;
}
}
foreach (var video in query)
{
VideoSearchResult result = new VideoSearchResult(video.VideoId, video.Title, video.Year, video.Director);
results.Add(result);
}
}
return(results);
}
