public static MbccBeerDiff FromBeer(MbccBeer beer, AddRemove action, DateTime changed)
{
var diff = new MbccBeerDiff
{
BreweryName = beer.BreweryName,
BeerName = beer.BeerName,
ABV = beer.ABV,
Style = beer.Style,
Session = beer.Session,
Action = action,
Changed = changed
};
return(diff);
}
public static async Task Main(string[] args)
{
// Configure.
var configBuilder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
//.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddEnvironmentVariables();
#if DEBUG
configBuilder = configBuilder.AddUserSecrets <Secrets>();
#endif
Configuration = configBuilder.Build();
// Get Windows-1252 encoding.
var enc1252 = CodePagesEncodingProvider.Instance.GetEncoding(1252);
// Fetch latest data.
var data = await FetchDataAsync();
// Set up data directory.
var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
var outputDir = Path.Combine(localAppData, OutputDir);
Directory.CreateDirectory(outputDir);
// Create file paths.
var tempFullFilePath = Path.Combine(outputDir, "mbcc-2018-complete.tmp.csv");
var tempDiffFilePath = Path.Combine(outputDir, "mbcc-2018-diff.tmp.csv");
var fullFilePath = Path.Combine(outputDir, "mbcc-2018-complete.csv");
var prevFullFilePath = Path.Combine(outputDir, "mbcc-2018-complete-prev.csv");
var diffFilePath = Path.Combine(outputDir, "mbcc-2018-diff.csv");
// Delete old temp files.
File.Delete(tempFullFilePath);
File.Delete(tempDiffFilePath);
// Write new data to temp file.
using (var writer = new CsvWriter(new StreamWriter(tempFullFilePath, false, enc1252)))
{
writer.WriteRecords(data.Beers);
}
// Load current data.
IList <MbccBeer> curRecords = null;
if (File.Exists(fullFilePath))
{
using (var textReader = new StreamReader(fullFilePath, enc1252))
using (var csvReader = new CsvReader(new CsvParser(textReader)))
{
curRecords = csvReader.GetRecords <MbccBeer>().ToList();
}
}
// Diff new data against current data.
if (curRecords != null && curRecords.Count != 0)
{
var newHashSet = new HashSet <MbccBeer>(data.Beers);
var curHashSet = new HashSet <MbccBeer>(curRecords);
var addedRecords = newHashSet
.Except(curHashSet)
.Select(x => MbccBeerDiff.FromBeer(x, AddRemove.Added, DateTime.Now));
var removedRecords = curHashSet
.Except(newHashSet)
.Select(x => MbccBeerDiff.FromBeer(x, AddRemove.Removed, DateTime.Now));
IList <MbccBeerDiff> prevDiffRecords = null;
// Read current diff data.
if (File.Exists(diffFilePath))
{
using (var reader = new CsvReader(new StreamReader(diffFilePath, enc1252)))
{
prevDiffRecords = reader.GetRecords <MbccBeerDiff>().ToList();
}
}
// Write diff data to temp file.
// Appending the newest data at the top, then the previous data.
using (var writer = new CsvWriter(new StreamWriter(tempDiffFilePath, false, enc1252)))
{
writer.WriteRecords(addedRecords);
writer.WriteRecords(removedRecords);
if (prevDiffRecords != null && prevDiffRecords.Count > 0)
{
writer.WriteRecords(prevDiffRecords);
}
}
// Delete current diff data.
File.Delete(diffFilePath);
// Copy new diff data.
File.Copy(tempDiffFilePath, diffFilePath);
}
// Delete oldest data.
File.Delete(prevFullFilePath);
// Move current data to previous.
if (File.Exists(fullFilePath))
{
File.Move(fullFilePath, prevFullFilePath);
}
// Move new data to current.
File.Move(tempFullFilePath, fullFilePath);
// Publish to Azure.
await PublishDataAsync(new[] { fullFilePath, diffFilePath });
}