public static async Task <Models.ShortLink> CreateHashIDItemIfNotExistsAsync(string url)
{
if (String.IsNullOrEmpty(url) || String.IsNullOrWhiteSpace(url))
{
throw new ArgumentException("Input URL cannot be null, empty or whitespaces");
}
Database database = cosmosClient.GetDatabase(databaseId);
Container hashIDContainer = database.GetContainer(hashIDContainerID);
int currentSeedValue = await SeedValueDBRepository.GetCurrentSeedValueAsync();
string hashID = HashIDGenerator.EncodeSeedValue(currentSeedValue);
Models.ShortLink shortLinkResponse = hashIDContainer.GetItemLinqQueryable <Models.ShortLink>(true)
.Where(shortLink => shortLink.Url == url)
.AsEnumerable()
.FirstOrDefault();
if (shortLinkResponse == null)
{
Models.ShortLink newShortlink = new Models.ShortLink
{
Id = currentSeedValue.ToString(),
Url = url,
HashID = hashID,
CreatedTime = DateTime.UtcNow,
};
shortLinkResponse =
await hashIDContainer.CreateItemAsync(newShortlink, new PartitionKey(newShortlink.Id));
currentSeedValue = await SeedValueDBRepository.GetCurrentSeedValueAsync();
SeedValueDBRepository.UpdateSeedValueItemAsync(currentSeedValue + 1);
}
return(shortLinkResponse);
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
SeedValueDBRepository.Initialize();
HashIDGenerator.Initialize();
HashIDDBRepository.Initialize();
}
public static async Task <Models.ShortLink> GetHashIDItemAsync(string hashID)
{
if (String.IsNullOrEmpty(hashID) || String.IsNullOrWhiteSpace(hashID))
{
return(null);
}
Database database = cosmosClient.GetDatabase(databaseId);
Container hashIDContainer = database.GetContainer(hashIDContainerID);
int seedValue = HashIDGenerator.DecodeSeedValue(hashID);
Models.ShortLink shortLinkResponse;
try
{
shortLinkResponse =
await hashIDContainer.ReadItemAsync <Models.ShortLink>(seedValue.ToString(), new PartitionKey(seedValue.ToString()));
}
catch (CosmosException ex) when(ex.StatusCode == HttpStatusCode.NotFound)
{
shortLinkResponse = null;
}
return(shortLinkResponse);
}
