public async ValueTask <List <MetricSnapshot> > LoadHistoryAsync(string repoOwner, string repoName)
{
if (string.IsNullOrWhiteSpace(repoOwner))
{
throw new ArgumentNullException(nameof(repoOwner));
}
if (string.IsNullOrWhiteSpace(repoName))
{
throw new ArgumentNullException(nameof(repoName));
}
const string searchPattern = "*" + _analysisSuffix;
var searchPath = GetPathToRepoDataFiles(repoOwner, repoName);
string[] matches;
try
{
matches = _fs.DirectoryGetFiles(searchPath, searchPattern);
}
catch (DirectoryNotFoundException)
{
// DirectoryNotFound is normal when trying to read analytics from a WatchedRepo that was just added, and has never been analyzed or cached
return(null);
}
if (matches.Length < 1)
{
return(new List <MetricSnapshot>());
}
var readMatches = matches
.Select(async p => await _fs.FileReadAllTextAsync(p))
.ToList();
await Task.WhenAll(readMatches);
var deserialized = readMatches
.Select(t => t.Result)
.Select(s => JsonConvert.DeserializeObject <MetricSnapshot>(s, _jsonSerializerSettings))
.ToList();
return(deserialized);
}