public static async Task EnsureProjectIsSubscribedToEvents([QueueTrigger("projects-events-check")] ProjectEntity queuedProject,
[Table("Projects")] CloudTable projects)
{
var project = projects
.CreateQuery <ProjectEntity>()
.Where(p => p.PartitionKey == queuedProject.PartitionKey && p.RowKey == queuedProject.RowKey)
.ToList()
.FirstOrDefault();
if (!project.SubscribedToEvents && !string.IsNullOrWhiteSpace(project.AccessToken))
{
project.SubscribedToEvents = await SubscribeToProjectEventsAsync(project);
await projects.ExecuteAsync(TableOperation.InsertOrMerge(project));
}
}
private static async Task <bool> SubscribeToProjectEventsAsync(ProjectEntity projectEntity)
{
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", projectEntity.AccessToken);
var url = projectEntity.GetCreateSubscriptionUri();
var createBody = projectEntity.GetCreatePullRequestCreatedSubscriptionBody();
var createPRSuccessful = false;
if (await IsEventSubscribedToProjectAsync(createBody, projectEntity))
{
createPRSuccessful = true;
}
else
{
var createEventResponse = await httpClient.PostAsJsonAsync(
url.ToString(),
createBody);
createPRSuccessful = createEventResponse.IsSuccessStatusCode;
}
var updateBody = projectEntity.GetCreatePullRequestUpdatedSubscriptionBody();
var updatePRSuccessful = false;
if (await IsEventSubscribedToProjectAsync(updateBody, projectEntity))
{
updatePRSuccessful = true;
}
else
{
var updateEventResponse = await httpClient.PostAsJsonAsync(
url.ToString(),
updateBody);
updatePRSuccessful = updateEventResponse.IsSuccessStatusCode;
}
return(createPRSuccessful && updatePRSuccessful);
}
}
private static async Task <bool> IsEventSubscribedToProjectAsync(CreateSubscription subscription, ProjectEntity projectEntity)
{
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", projectEntity.AccessToken);
var url = $"https://{projectEntity.PartitionKey}/_apis/hooks/subscriptionsquery?api-version=4.1-preview";
var query = new CreateSubscriptionQuery(subscription);
var resp = await httpClient.PostAsJsonAsync(url, query);
if (!resp.IsSuccessStatusCode)
{
return(false);
}
var subscriptionResultJson = await resp.Content.ReadAsStringAsync();
var subscriptionResult = JsonConvert.DeserializeObject <dynamic>(subscriptionResultJson);
return((subscriptionResult?.results.Count ?? 0) > 0);
}
}
public static Uri GetCreateSubscriptionUri(this ProjectEntity project)
{
return(new Uri($"https://{project.PartitionKey}" +
"/DefaultCollection/_apis/hooks/subscriptions?api-version=1.0"));
}