public async Task Subscribe([QueueTrigger("twitch-channel-subscription", Connection = "TwitchChatStorage")] string msg,
ILogger logger)
{
var twitchEndPoint = "https://api.twitch.tv/helix/webhooks/hub"; // could end up like configuration["Twitch:HubEndpoint"]
//#if DEBUG
var leaseInSeconds = 864000; // = 10 days
//#endif
var channelId = long.TryParse(msg, out var _) ? msg : await GetChannelIdForUserName(msg);
var callbackUrl = new Uri(Configuration["EndpointBaseUrl"]);
var payload = new TwitchWebhookSubscriptionPayload
{
callback = new Uri(callbackUrl, $"?channelId={channelId}").ToString(),
mode = "subscribe",
topic = $"https://api.twitch.tv/helix/streams?user_id={channelId}",
lease_seconds = leaseInSeconds,
secret = TWITCH_SECRET
};
logger.LogDebug($"Posting with callback url: {payload.callback}");
var stringPayload = JsonConvert.SerializeObject(payload);
logger.Log(LogLevel.Information, $"Subscribing to Twitch with payload: {stringPayload}");
using (var client = GetHttpClient(twitchEndPoint))
{
var token = await GetAccessToken();
client.DefaultRequestHeaders.Add("Authorization", $"Bearer {token.AccessToken}");
var responseMessage = await client.PostAsync("", new StringContent(stringPayload, Encoding.UTF8, @"application/json"));
if (!responseMessage.IsSuccessStatusCode)
{
var responseBody = await responseMessage.Content.ReadAsStringAsync();
logger.Log(LogLevel.Error, $"Error response body: {responseBody}");
}
else
{
var sub = new CurrentSubscription
{
ChannelId = channelId,
ChannelName = msg,
ExpirationDateTimeUtc = DateTime.UtcNow.AddSeconds(leaseInSeconds).AddDays(-1)
};
var repo = new CurrentSubscriptionsRepository(Configuration);
await repo.AddSubscription(sub);
}
}
}
public async Task ScheduledResubscribe([TimerTrigger("0 2 */2 * * *", RunOnStartup = true)] TimerInfo timer,
[Queue("twitch-channel-subscription", Connection = "TwitchChatStorage")] CloudQueue queue,
ILogger logger)
{
var repo = new CurrentSubscriptionsRepository(Configuration);
var currentSubscriptions = await repo.GetExpiringSubscriptions();
foreach (var item in currentSubscriptions)
{
await queue.AddMessageAsync(new CloudQueueMessage(item.ChannelName));
await repo.RemoveSubscription(item);
}
}
