public ActionResult metadata(int movieId)
{
try{
//build the list of data to work with from the provided .csv file
List <MovieData> rawData = System.IO.File.ReadAllLines("..\\metadata.csv")
.Skip(1)
.Select(d => DataFromCsv.MovieDataFromCsv(d))
.ToList();
//initiate a new object to populate with the data for the output
List <MovieData> movieData = new List <MovieData>();
//Initial Linq query to filter down the results
movieData = rawData.Where(x => x.movieId == movieId && x.id != -1).Select(x => x).ToList();
//Group the results and then order by language
movieData = movieData.GroupBy(x => x.language)
.Select(x => x.OrderByDescending(x => x.id).First())
.OrderBy(x => x.language)
.ToList();
//Convert to Dto for export
List <movieDataDto> Result = movieData.Select(x => new movieDataDto {
movieId = x.movieId,
title = x.title,
language = x.language,
duration = x.duration,
releaseYear = x.releaseYear
}
).ToList();
//Check to make sure that the movie data exists, and if not return a 404
if (Result == null)
{
return(BadRequest());
}
//if the movie data does exist, serialise to Json and then return the result
else
{
var JsonMovieData = JsonSerializer.Serialize <List <movieDataDto> >(Result);
return(Ok(JsonMovieData));
}
}
//catch in case there is an issue with reading the data, and if there is return a 404 with the innder exception.
catch (Exception ex) {
return(NotFound(ex.InnerException));
}
}
public ActionResult moviesStats()
{
//Collect the Data from the CSV Sources
List <MovieData> rawData = System.IO.File.ReadAllLines("..\\metadata.csv")
.Skip(1)
.Select(d => DataFromCsv.MovieDataFromCsv(d))
.ToList();
List <MovieStats> rawStats = System.IO.File.ReadAllLines("..\\stats.csv")
.Skip(1)
.Select(d => DataFromCsv.MovieStatsFromCsv(d))
.ToList();
//refine data by grouping
rawData = rawData.GroupBy(g => g.movieId).Select(x => x.OrderByDescending(x => x.movieId).First()).ToList();
rawStats = rawStats.GroupBy(g => g.movieId)
.Select(x => new MovieStats
{
movieId = x.First().movieId,
averageWatchDurationS = x.Sum(c => c.averageWatchDurationS),
count = x.Count()
}).ToList();
//combine data for output Json
List <MovieStatsDto> movieStatsDto = rawData.Join(rawStats, d => d.movieId, s => s.movieId, (d, s) => new MovieStatsDto {
movieId = d.movieId,
title = d.title,
averageWatchDurationS = s.averageWatchDurationS,
watches = (s.averageWatchDurationS / Convert.ToInt64(s.count)),
releaseYear = d.releaseYear
}).OrderByDescending(x => x.watches).ThenBy(x => x.releaseYear).ToList();
//Covert output to Json
var JsonMovieStats = JsonSerializer.Serialize <List <MovieStatsDto> >(movieStatsDto);
//Return Json
return(Ok(JsonMovieStats));
}
