public async Task <IActionResult> Ratings(
[HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation("Ratings function processed a request.");
string coinId = req.Query["coinId"];
if (coinId == null)
{
return(new BadRequestObjectResult("Please pass a coinId on the query string"));
}
await ratingsDataTableStorage.Init();
var ratings = await ratingsDataTableStorage.GetRatings(coinId);
if (ratings.Count() == 0)
{
return(new NotFoundResult());
}
string filter = req.Query["order"];
string limitStr = req.Query["limit"];
if (filter != null &&
limitStr != null &&
int.TryParse(limitStr, out var limit))
{
switch (filter.ToLower())
{
case "top":
ratings = ratings.OrderByDescending(x => x.AverageRating).Take(limit);
break;
case "bad":
ratings = ratings.OrderBy(x => x.AverageRating).Take(limit);
break;
default:
break;
}
}
return(new OkObjectResult(ratings));
}
private async Task <double> GetCoinRating(string coinId)
{
var ratings = await ratingDataTableStorage.GetRatings(coinId);
if (ratings.Count() == 0)
{
return(0);
}
return(ratings.Average(x => x.AverageRating));
}