public FacebookWebHook()
{
Get["/__fbmp/webhook"] = this.HandleRequest(this.WebhookGet);
Post["/__fbmp/webhook"] = this.HandleRequest(this.WebhookPost);
Delete["/__fbmp/optin/{type}"] = this.HandleRequest(this.HandleOptOut);
Post["/__fbmp/optout/{type}"] = this.HandleRequest(this.HandleOptOut);
Get["/__fbmp/optin/{type}"] = this.HandleRequest((arg) =>
{
return(FacebookWebHook.IsOptInActive(this.SiteDatabase, this.Context, (string)arg.type));
});
Get["/__fbmp/linkaccounts"] = this.HandleRequest((arg) =>
{
var session = this.SiteDatabase.Query <FacebookChatSession>()
.Where(s => s.NcbUserId == 0)
.AsEnumerable();
foreach (var existingSession in session)
{
var customerPSID = existingSession.PageScopedId;
// no prior session - see if user have logged in with us before
IEnumerable <dynamic> result = FacebookWebHook.FacebookApiGet(this.CurrentSite,
"/" + customerPSID + "/ids_for_apps",
true);
var idList = result.FirstOrDefault();
if (idList != null) // user have logged in with us before
{
var id = (string)idList.id;
var existingUser = this.SiteDatabase.Query <NcbUser>().Where(u => u.FacebookAppScopedId == id).FirstOrDefault();
if (existingUser != null)
{
existingSession.NcbUserId = existingUser.Id;
existingSession.IsRecheckSubscriptionRequired = true;
this.SiteDatabase.UpsertRecord(existingSession);
if (existingUser.FacebookPageScopedId == null)
{
existingUser.FacebookPageScopedId = customerPSID;
this.SiteDatabase.UpsertRecord(existingUser);
}
}
}
}
return("OK");
});
}
public FacebookWebHook()
{
Get["/__fbmp/webhook"] = this.HandleRequest(this.WebhookGet);
Post["/__fbmp/webhook"] = this.HandleRequest(this.WebhookPost);
Delete["/__fbmp/optin/{type}"] = this.HandleRequest(this.HandleOptOut);
Post["/__fbmp/optout/{type}"] = this.HandleRequest(this.HandleOptOut);
Get["/__fbmp/optin/{type}"] = this.HandleRequest((arg) =>
{
return(FacebookWebHook.IsOptInActive(this.SiteDatabase, this.Context, (string)arg.type));
});
}
private void HandleChangesWebhook(dynamic fullbody, dynamic entry)
{
var change = entry.changes[0];
if (change.field == "live_videos" &&
change.value.status == "live")
{
string id = change.value.id;
IEnumerable <dynamic> getIdApiResult = FacebookWebHook.FacebookApiGet(this.CurrentSite, string.Format("/{0}?fields=video,title,description,permalink_url", id));
var result = getIdApiResult.FirstOrDefault();
this.HandleNewLiveVideo(fullbody, id, result);
return;
}
if (change.field == "feed" &&
change.value.reaction_type != null)
{
this.HandleReaction(fullbody,
(string)change.value.post_id,
(string)change.value.sender_id,
(string)change.value.sender_name,
(string)change.value.reaction_type,
change.value);
return;
}
if (change.field == "feed" &&
change.value.comment_id != null)
{
this.HandleComment(fullbody,
(string)change.value.post_id,
(string)change.value.sender_id,
(string)change.value.sender_name,
(string)change.value.message,
change.value);
return;
}
if (change.field == "leadgen")
{
this.HandleLeadGenSetup(fullbody, change.value);
return;
}
}
/// <summary>
/// Handle lead generation ad
/// </summary>
/// <param name="fullbody"></param>
/// <param name="values"></param>
private void HandleLeadGenSetup(dynamic fullbody, dynamic values)
{
var leadId = (string)values.leadgen_id;
var created_time = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)
.AddMilliseconds((long)values.created_time)
.ToLocalTime();
IEnumerable <dynamic> result = FacebookWebHook.FacebookApiGet(this.CurrentSite, "/" + leadId);
var lead = result.FirstOrDefault();
if (lead == null || lead.error != null)
{
MailSenderModule.SendEmail("*****@*****.**", "LeadGen Error - Cannot get Lead", "Lead Id: " + leadId + " Message: " + lead.error.message);
return;
}
JObject fieldValues = new JObject();
foreach (var field in lead.field_data as JArray)
{
if (field["values"].Count() == 1)
{
fieldValues.Add(field["name"].Value <string>(), field["values"][0].Value <string>());
}
else
{
fieldValues.Add(field["name"].Value <string>(), field["values"]);
}
}
this.HandleLeadGen(
(string)values.ad_id,
(string)values.form_id,
(string)values.leadgen_id,
created_time,
(string)values.page_id,
(string)values.adgroup_id,
(object)lead,
fieldValues);
}
/// <summary>
/// Call Facebook Graph API with given set of parameters
/// </summary>
/// <param name="url"></param>
/// <param name="sendSecretProof"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public static dynamic FacebookApi(Method method, dynamic siteSettings, string url, object payload, bool sendSecretProof = false, bool throwOnError = false, params string[] queryStringPair)
{
RestClient client = new RestClient("https://graph.facebook.com/");
RestRequest req = new RestRequest(url, method);
// add parameters
if (queryStringPair != null)
{
if (queryStringPair.Length % 2 != 0)
{
throw new ArgumentOutOfRangeException("parameterPairs are not pairs");
}
for (int i = 0; i < queryStringPair.Length; i += 2)
{
var key = queryStringPair[i];
var value = queryStringPair[i + 1];
if (key == "access_token")
{
throw new ArgumentOutOfRangeException("access_token will be added automatically");
}
if (key == "appsecret_proof")
{
throw new ArgumentOutOfRangeException("appsecret_proof will be added automatically");
}
req.Parameters.Add(new Parameter()
{
Name = key,
Value = value,
Type = ParameterType.QueryString
});
}
}
if (sendSecretProof)
{
string hash = MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] as string;
if (hash == null)
{
hash = FacebookWebHook.HashHmac((string)siteSettings.FacebookMessenger.PageAccessToken,
(string)siteSettings.Application.FacebookAppSecret);
MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] = hash;
}
req.AddQueryParameter("appsecret_proof", hash);
}
req.AddQueryParameter("access_token", (string)siteSettings.FacebookMessenger.PageAccessToken);
if (payload is string)
{
req.AddParameter("payload", payload);
}
else
{
req.RequestFormat = DataFormat.Json;
req.AddJsonBody(payload);
}
var response = client.Execute(req);
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
MailSenderModule.SendEmail("*****@*****.**", "Facebook API Post Error", response.ToString());
if (throwOnError)
{
throw new Exception("Server Returned: " + response.StatusCode);
}
}
return(JObject.Parse(response.Content));
}
/// <summary>
/// Call Facebook Graph API with given set of parameters
/// </summary>
/// <param name="url"></param>
/// <param name="sendSecretProof"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public static IEnumerable <dynamic> FacebookApiGet(dynamic siteSettings, string url, bool sendSecretProof = false, bool throwOnError = false, params string[] queryStringPair)
{
var client = new RestClient("https://graph.facebook.com/");
var req = new RestRequest(url, Method.GET);
// add parameters
if (queryStringPair != null)
{
if (queryStringPair.Length % 2 != 0)
{
throw new ArgumentOutOfRangeException("parameterPairs are not pairs");
}
for (int i = 0; i < queryStringPair.Length; i += 2)
{
var key = queryStringPair[i];
var value = queryStringPair[i + 1];
if (key == "access_token")
{
throw new ArgumentOutOfRangeException("access_token will be added automatically");
}
if (key == "appsecret_proof")
{
throw new ArgumentOutOfRangeException("appsecret_proof will be added automatically");
}
req.Parameters.Add(new Parameter()
{
Name = key,
Value = value,
Type = ParameterType.QueryString
});
}
}
if (sendSecretProof)
{
string hash = MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] as string;
if (hash == null)
{
hash = FacebookWebHook.HashHmac((string)siteSettings.FacebookMessenger.PageAccessToken,
(string)siteSettings.Application.FacebookAppSecret);
MemoryCache.Default["FacebookMessengerModule.appsecret_proof"] = hash;
}
req.AddQueryParameter("appsecret_proof", hash);
}
req.AddQueryParameter("access_token", (string)siteSettings.FacebookMessenger.PageAccessToken);
LoadMore:
var response = client.Execute(req);
if (throwOnError && response.StatusCode != System.Net.HttpStatusCode.OK)
{
throw new Exception("Server Returned: " + response.StatusCode);
}
dynamic result = JObject.Parse(response.Content);
if (result.data != null)
{
foreach (var item in result.data)
{
yield return(item);
}
}
else
{
// this is a single item response
yield return(result);
}
if (result.paging != null && result.paging.next != null)
{
req.AddQueryParameter("after", (string)result.paging.cursors.after);
goto LoadMore;
}
}
private dynamic HandleMessagingWebhook(dynamic entry, dynamic messaging)
{
if (messaging.delivery != null) // this is just delivery message
{
return("EVENT_RECEIVED");
}
if (messaging.read != null) // this is just delivery message
{
return("EVENT_RECEIVED");
}
// Get the sender PSID
string customerPSID = messaging.sender.id;
if (customerPSID == (string)entry.id) // this is message sent by bot
{
customerPSID = messaging.recipient.id; // so the cusotmer psid is recipient
}
lock (BaseModule.GetLockObject(customerPSID))
{
// try to get the current chat session
var existingSession = MemoryCache.Default["FBMP:" + customerPSID] as FacebookChatSession;
Action linkAccount = () =>
{
// no prior session - see if user have logged in with us before
IEnumerable <dynamic> result = FacebookWebHook.FacebookApiGet(this.CurrentSite,
"/" + customerPSID + "/ids_for_apps",
true);
var idList = result.FirstOrDefault();
if (idList != null) // user have logged in with us before
{
var id = (string)idList.id;
var existingUser = this.SiteDatabase.Query <NcbUser>().Where(u => u.FacebookAppScopedId == id).FirstOrDefault();
if (existingUser != null)
{
existingSession.NcbUserId = existingUser.Id;
if (existingUser.FacebookPageScopedId == null)
{
existingUser.FacebookPageScopedId = customerPSID;
this.SiteDatabase.UpsertRecord(existingUser);
}
}
else
{
// cannot find in database - something must slipped
// should create user here
MailSenderModule.SendEmail("*****@*****.**",
"FacebookWebHook Handler Error",
"<b>User :</b>" + customerPSID + "<br/>" +
"User have logged in with us before, with App Scoped Id but did not have record in database");
}
}
};
if (existingSession == null)
{
existingSession = this.SiteDatabase.Query <FacebookChatSession>().Where(u => u.PageScopedId == customerPSID).FirstOrDefault();
if (existingSession == null)
{
existingSession = new FacebookChatSession();
existingSession.PageScopedId = customerPSID;
linkAccount();
MemoryCache.Default["FBMP:" + customerPSID] = existingSession;
}
}
// this user have chat with us already
// but may have registered on the website after they chat with us
if (existingSession.NcbUserId == 0)
{
linkAccount();
MemoryCache.Default["FBMP:" + customerPSID] = existingSession;
}
// Update profile if profile is outdated
if (DateTime.Now.Subtract(existingSession.LastProfileUpdate).TotalDays > 7)
{
if (existingSession.NcbUserId != 0)
{
var user = this.SiteDatabase.GetById <NcbUser>(existingSession.NcbUserId);
existingSession.UserProfile = user.Profile;
}
else
{
IEnumerable <dynamic> result = FacebookWebHook.FacebookApiGet(this.CurrentSite,
"/" + customerPSID,
false);
existingSession.UserProfile = result.FirstOrDefault();
}
existingSession.LastProfileUpdate = DateTime.Now;
this.SiteDatabase.UpsertRecord(existingSession);
MemoryCache.Default["FBMP:" + customerPSID] = existingSession;
}
existingSession.HandleWebhook(this.SiteDatabase, this.CurrentSite, messaging);
}
return("EVENT_RECEIVED");
}
