public async Task <ServiceResult <string> > CreateShortCode(SourceUrlDto entity)
{
var result = new ServiceResult <string>();
try
{
Boolean isValid = true;
try
{
entity.Url.ValidateUrl();
}
catch (Exception)
{
result.AddError("", "Invalid Url");
isValid = false;
}
if (isValid)
{
var codeResult = await this.GenerateShortCode(entity);
result.Response = codeResult.Code.ToString();
}
return(result);
}
catch (Exception e)
{
result.AddError("", e.InnerException.ToString());
}
return(result);
}
public async Task <IActionResult> Create(SourceUrlDto model)
{
try
{
var result = await _urlService.CreateShortCode(model);
if (!result.IsSuccess)
{
return(BadRequest(result));
}
return(Ok(result.Response));
}
catch (Exception ex)
{
return(BadRequest(new { message = ex.Message }));
}
}
private async Task <Url> GenerateShortCode(SourceUrlDto sourceUrl)
{
var existing = await this.IsAlreadyShortened(sourceUrl.Url);
if (existing != null)
{
return(existing);
}
else
{
var code = await this.GetCode(sourceUrl);
var shortCode = new Url {
Id = Guid.NewGuid().ToString(), SourceUrl = sourceUrl.Url, Start_Date = DateTime.UtcNow, Code = code
};
DB.Urls.Add(shortCode);
await DB.SaveChangesAsync();
return(shortCode);
}
}
protected async Task <string> GetCode(SourceUrlDto sourceUrl)
{
var code = "";
var existing = await DB.Urls.SingleOrDefaultAsync(x => x.SourceUrl == sourceUrl.Url);
if (existing == null)
{
if (sourceUrl.Code == "")
{
code = ShortCodeGenerator.Generate();
}
else
{
code = sourceUrl.Code;
}
}
else
{
code = existing.Code;
}
return(code);
}