/// <summary>
/// Get issue count from the server. This operation may be retried internally and take a while to complete.
/// </summary>
/// <remarks>Uses the REST API <a href="https://www.jetbrains.com/help/youtrack/standalone/Get-a-Number-of-Issues.html">Get a Number of Issues</a>.</remarks>
/// <param name="filter">Apply a filter to issues.</param>
/// <returns>The number of <see cref="Issue" /> that match the specified filter.</returns>
/// <exception cref="T:System.Net.HttpRequestException">When the call to the remote YouTrack server instance failed.</exception>
public async Task <long> GetIssueCount(string filter = null)
{
var query = !string.IsNullOrEmpty(filter)
? $"filter={WebUtility.UrlEncode(filter)}"
: string.Empty;
var client = await _connection.GetAuthenticatedHttpClient();
var retryPolicy = new LinearRetryPolicy <long>(async() =>
{
var response = await client.GetAsync($"rest/issue/count?{query}");
if (response.StatusCode == HttpStatusCode.NotFound)
{
return(default(long));
}
response.EnsureSuccessStatusCode();
return(JsonConvert.DeserializeObject <SubValue <long> >(
await response.Content.ReadAsStringAsync()).Value);
},
result => Task.FromResult(result < 0),
TimeSpan.FromSeconds(1),
30);
return(await retryPolicy.Execute());
}
