// Deletes the notification subscription for the user
public static async Task UnsubscribeForInboxUpdates(string userId)
{
var idFilter = Builders <User> .Filter.Eq("Id", new ObjectId(userId));
var user = await userCollection.Find(idFilter).FirstOrDefaultAsync();
if (null != user && !string.IsNullOrEmpty(user.SubscriptionId))
{
OutlookHelper outlook = new OutlookHelper();
outlook.AnchorMailbox = user.Email;
await outlook.DeleteSubscription(user.Email, user.AccessToken, user.SubscriptionId);
var update = Builders <User> .Update.Set("SubscriptionId", string.Empty)
.Set("SubscriptionExpires", DateTime.UtcNow);
var result = await userCollection.UpdateOneAsync(idFilter, update);
}
}
// Creates a notification subscription on the user's inbox and
// saves the subscription ID on the user in the database
public static async Task SubscribeForInboxUpdates(string userId, string notificationUrl)
{
var idFilter = Builders <User> .Filter.Eq("Id", new ObjectId(userId));
var user = await userCollection.Find(idFilter).FirstOrDefaultAsync();
if (null != user && string.IsNullOrEmpty(user.SubscriptionId))
{
OutlookHelper outlook = new OutlookHelper();
outlook.AnchorMailbox = user.Email;
JObject subscription = await outlook.CreateInboxSubscription(user.Email, user.AccessToken, notificationUrl);
var update = Builders <User> .Update.Set("SubscriptionId", (string)subscription["Id"])
.Set("SubscriptionExpires", DateTime.Parse((string)subscription["SubscriptionExpirationDateTime"]));
var result = await userCollection.UpdateOneAsync(idFilter, update);
}
}
public static async Task SyncUsersInbox(string userId)
{
User user = await GetUserById(userId);
if (null != user)
{
OutlookHelper outlook = new OutlookHelper();
outlook.AnchorMailbox = user.Email;
// If we have no prior sync state, do an intial sync. This sync always
// returns a deltatoken, even if there are more results on the server.
// You must always do another sync after the initial sync.
bool isInitialSync = string.IsNullOrEmpty(user.SyncState);
bool syncComplete = false;
string newSyncState = user.SyncState;
string newSkipToken = string.Empty;
while (!syncComplete)
{
var syncResults = await outlook.SyncInbox(user.Email, user.AccessToken, newSyncState, newSkipToken);
// Do updates (add/delete/update)
await ParseSyncItems(user.Id, (JArray)syncResults["value"]);
// Is there a skip token?
if (null != syncResults["@odata.nextLink"])
{
// There are more results, need to call again
// nextLink is a URL which has a $skiptoken parameter
string nextLink = (string)syncResults["@odata.nextLink"];
string query = new UriBuilder(nextLink).Query;
NameValueCollection queryParams = HttpUtility.ParseQueryString(query);
if (string.IsNullOrEmpty(queryParams["$skiptoken"]))
{
throw new Exception(
"Failed to find $skiptoken in nextLink value in sync response. Try resetting sync state.");
}
newSyncState = string.Empty;
newSkipToken = queryParams["$skiptoken"];
}
else if (null != syncResults["@odata.deltaLink"])
{
// Delta link is a URL which has a $deltatoken parameter
string deltaLink = (string)syncResults["@odata.deltaLink"];
string query = new UriBuilder(deltaLink).Query;
NameValueCollection queryParams = HttpUtility.ParseQueryString(query);
if (string.IsNullOrEmpty(queryParams["$deltatoken"]))
{
throw new Exception(
"Failed to find $deltatoken in deltaLink value in sync response. Try resetting sync state.");
}
newSkipToken = string.Empty;
newSyncState = queryParams["$deltatoken"];
if (isInitialSync)
{
isInitialSync = false;
}
else
{
syncComplete = true;
}
}
else
{
// No deltaLink or nextLink, something's wrong
throw new Exception("Failed to find either a deltaLink or nextLink value in sync response. Try resetting sync state.");
}
}
// Save new sync state to the user's record in database
var idFilter = Builders <User> .Filter.Eq("Id", new ObjectId(userId));
var userUpdate = Builders <User> .Update.Set("SyncState", newSyncState);
var result = await userCollection.UpdateOneAsync(idFilter, userUpdate);
}
}
