public async Task <TrimUriModel> TrimUrlAsync(
string address
)
{
if (address == null)
{
throw new ArgumentException();
}
address = address.Trim();
if (string.IsNullOrEmpty(address))
{
throw new ArgumentException();
}
address = address.ToLower();
if (!Uri.TryCreate(address, UriKind.Absolute, out Uri uriResult))
{
throw new ArgumentException();
}
var result = new TrimUriModel(address);
var find = await DbContext
.TrimUrls
.Where(x => x.Address == address)
.FirstOrDefaultAsync();
if (find != null)
{
result.Trimmed = UriPrefix + find.HashCode;
return(result);
}
var key = "";
do
{
key = HasherService.Generate(UriSuffixLength);
var conflict = await DbContext
.TrimUrls
.AnyAsync(x => x.HashCode.ToLower() == key);
if (!conflict)
{
break;
}
}while (true);
var append = new TrimUrlEntity
{
Address = address,
HashCode = key,
};
DbContext.TrimUrls.Add(append);
await DbContext.SaveChangesAsync();
result.Trimmed = UriPrefix + key;
return(result);
}
public async Task ValidInputsTests()
{
// arrange
var generator = new GeneratorService();
using (var scope = new TestScope())
using (var context = scope.ConnectDb())
using (
var instance = new TrimmerService(
context,
generator,
scope.Config
)
)
{
// act
var urls = new List <string>();
foreach (var key in ValidInputs)
{
var val = await instance
.TrimUrlAsync(key);
urls.Add(val.Print());
}
var list = await context
.TrimUrls
.ToListAsync();
var cast = list.Select(i =>
{
var j = new TrimUriModel(
i.Address,
instance.UriPrefix + i.HashCode
);
return(j.Print());
}).ToList();
var match = Enumerable.SequenceEqual(urls, cast);
// assert
Assert.True(match);
}
}
