/// <summary>
/// Adds users email to the database with their chosen match objects.
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <APIGatewayProxyResponse> ConfirmSubscribe(APIGatewayProxyRequest request, ILambdaContext context)
{
var logger = new Esk8LambdaLogger(context.Logger);
logger.Log("Confirm Subscribe endpoint reached");
if (request.QueryStringParameters.ContainsKey("confirmkey"))
{
string encryptionkey = Environment.GetEnvironmentVariable("ESK8BST_ENCRYPTION_KEY");
string b64payload = request.QueryStringParameters["confirmkey"];
logger.Log("Received this as the confirm key: " + request.QueryStringParameters["confirmkey"]);
string decrypted = EncryptorService.DecryptConfirmKey(b64payload, encryptionkey);
PostedSubscribeObject pso = null;
try {
JObject jobj = JObject.Parse(decrypted);
pso = PostedSubscribeObject.FromJson(jobj);
} catch (Exception e) {
logger.Log($"Tried to parse malformed json and failed at Confirm Subscribe: {e.Message}");
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.InternalServerError,
Body = "Failed to parse json properly",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
if (pso != null && pso.Email.Contains("@") && pso.Matches.Count > 0)
{
FirestoreService FSS = new FirestoreService(logger);
await FSS.UpsertSubscriber(pso);
await FSS.InsertPreconfirmed(pso.Email);
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.Created,
Body = "Alright! You've been confirmed as interested in receiving updates from https://esk8bst.com",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
}
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.BadRequest,
Body = "Failed to properly parse the confirm link.",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
/// <summary>
/// A Lambda function to respond to HTTP Get methods from API Gateway
/// </summary>
/// <param name="request"></param>
/// <returns>The list of blogs</returns>
public APIGatewayProxyResponse Get(APIGatewayProxyRequest request, ILambdaContext context)
{
var logger = new Esk8LambdaLogger(context.Logger);
logger.Log("Get Request\n");
var response = new APIGatewayProxyResponse {
StatusCode = (int)HttpStatusCode.OK,
Body = "Hello AWS Serverless",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
};
logger.Log("A get request ocurred - usually this is the developer testing that the serverless suite still works.");
// This is just a test so that we can tell if the server is reading query params
if (request.QueryStringParameters != null && request.QueryStringParameters.Count > 0)
{
response.Body += String.Join("\n", request.QueryStringParameters.Select(x => $"Key: {x.Key} :: Value: {x.Value}"));
}
return(response);
}
/// <summary>
/// The endpoint hit when a user submits their email to esk8bst
/// This schedules a Mailgun Email that will include a Confirm Subscribe Link
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <APIGatewayProxyResponse> Subscribe(APIGatewayProxyRequest request, ILambdaContext context)
{
var logger = new Esk8LambdaLogger(context.Logger);
logger.Log("Subscribe endpoint reached");
if (request.HttpMethod != HttpMethod.Post.Method)
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.MethodNotAllowed
});
}
;
string postbody = request.Body;
PostedSubscribeObject pso = null;
string confirmkey = "";
try {
JObject jobj = JObject.Parse(postbody);
pso = PostedSubscribeObject.FromJson(jobj);
if (pso.Email.Contains("@") && pso.Matches.Count > 0) // we can proceed
{
FirestoreService FSS = new FirestoreService(logger);
if (await FSS.CheckIsPreconfirmed(pso.Email))
{
// Immediately subscribe the user, they've already been here.
await FSS.UpsertSubscriber(pso);
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.Created,
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
Body = "Alright! You've been confirmed as interested in receiving updates from https://esk8bst.com",
});
}
else
{
// Not pre-confirmed, send an opt-in email.
string encryptionKey = Environment.GetEnvironmentVariable("ESK8BST_ENCRYPTION_KEY");
confirmkey = EncryptorService.CreateConfirmKey(pso.ToJson().ToString(), encryptionKey);
}
}
} catch (Exception e) {
logger.Log($"Tried to parse a malformed subscriber json: {e.Message}");
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.InternalServerError,
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
Body = "Failed to parse json properly",
});
}
if (String.IsNullOrWhiteSpace(confirmkey))
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.InternalServerError,
Body = "Failed to parse json properly - no email found",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
MailgunService MSS = new MailgunService(logger);
MailgunEmail m = new MailgunEmail()
{
To = new List <string> {
pso.Email
},
From = MailgunService.POSTMASTER,
Subject = "Esk8Bst Notification Opt In Request",
Body = "" +
"Someone has registered you as being interested in receiving notifications about new electric skateboard postings from https://esk8bst.com.\n\n" +
"If this was you, please click the link below to confirm your email. If this was not you, or you no longer wish to receive emails from us, then ignore this message.\n\n" +
$"https://1lol87xzbj.execute-api.us-east-2.amazonaws.com/Prod/confirm?confirmkey={confirmkey}",
};
bool success = await MSS.Send(m);
if (!success)
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.InternalServerError,
Body = "Failed to send email to recipent",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
//An email has been sent to the address specified confirming your subscription
var response = new APIGatewayProxyResponse {
StatusCode = (int)HttpStatusCode.OK,
Body = "An email has been sent to the address specified confirming your subscription",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
};
return(response);
}
/// <summary>
/// The core function launched every hour.
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task Scan(APIGatewayProxyRequest request, ILambdaContext context)
{
var logger = new Esk8LambdaLogger(context.Logger);
logger.Log("Scan initiated endpoint reached");
HttpClient Client = new HttpClient();
/* Set up our Services */
FirestoreService FSS = new FirestoreService(logger);
Esk8Service ESS = new Esk8Service(logger, Client);
RedditService RSS = new RedditService(logger, ESS, Client);
MailgunService MSS = new MailgunService(logger, Client);
MatchService LSS = new MatchService(logger);
/* Get our Firebase last-scanned time */
ScanData sd = await FSS.GetScanData();
if (sd == null)
{
return; /* Something happened, so we quit. */
}
/* Check Firebase Subscribers */
List <Subscriber> subscribers = await FSS.GetSubscribers();
if (subscribers == null || subscribers.Count == 0)
{
ScanData updatedScanData = new ScanData()
{
LastScanDate = DateTimeOffset.Now, MostRecentlySeen = DateTimeOffset.Now
};
await FSS.UpdateScanTime(updatedScanData);
return;
}
/* Get the BST Thread */
if (!(await RSS.GetRedditItem() is JObject frontPage))
{
/* Some kind of error ocurred, do not update */
return;
}
string BSTUrl = RSS.FindBSTThreadUrl(frontPage);
if (String.IsNullOrWhiteSpace(BSTUrl))
{
/* Some kind of error ocurred, do not update */
return;
}
if (!(await RSS.GetRedditItem(BSTUrl) is JArray BSTPage))
{
/* Some kind of error ocurred, do not update */
return;
}
/* Check if there are new posts, to save on Network requests fetching Company / Board information */
if (!RSS.AnyNewPosts(BSTPage, sd.MostRecentlySeen))
{
/* There have been no new posts since last time. */
ScanData updatedScanData = new ScanData()
{
LastScanDate = DateTimeOffset.Now, MostRecentlySeen = DateTimeOffset.Now
};
await FSS.UpdateScanTime(updatedScanData);
return;
}
/* Fetch Company and Product information from Esk8 servers */
List <Product> prods = await ESS.GetCommonBoards();
List <Company> comps = await ESS.GetCommonCompanies();
comps = CompanyParser.CombineCompanyLists(comps, prods.Select(x => x.Company));
List <RegexCategory <Company> > CompRs = ESS.GetCompanyRegexs(comps);
List <RegexCategory <Product> > ProdRs = ESS.GetProductRegexs(prods);
/* Parse the full thread for new posts */
List <BSTComment> comments = RSS.ParseComments(BSTPage, CompRs, ProdRs, sd.LastScanDate);
/* Line up potential Match Objects */
/* At this point we don't update until emails have been sent out. */
Dictionary <Subscriber, List <LambdaMatch> > lambdadelta = LSS.MakeMatches(subscribers, comments);
/* Assemble the emails to send */
IEnumerable <MailgunEmail> emails = lambdadelta.Select(x => MSS.MakeEmail(x.Key, x.Value));
/* Send emails */
bool SentSuccessfully = await MSS.BatchSend(emails);
if (SentSuccessfully)
{
ScanData updatedScanData = new ScanData()
{
LastScanDate = DateTimeOffset.Now, MostRecentlySeen = DateTimeOffset.Now
};
await FSS.UpdateScanTime(updatedScanData);
}
}
/// <summary>
/// Removes users email from the db
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <APIGatewayProxyResponse> Unsubscribe(APIGatewayProxyRequest request, ILambdaContext context)
{
var logger = new Esk8LambdaLogger(context.Logger);
logger.Log("Unsubscribe endpoint reached");
if (request.HttpMethod != HttpMethod.Get.Method)
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.MethodNotAllowed,
Body = "This endpoint only responds to GET requests",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
string key = Environment.GetEnvironmentVariable("ESK8BST_ENCRYPTION_KEY");
string decr = "";
if (request.QueryStringParameters.ContainsKey("confirmkey"))
{
string payload = request.QueryStringParameters["confirmkey"];
if (!String.IsNullOrWhiteSpace(payload))
{
decr = EncryptorService.Base64Decode(payload);
//decr = AESThenHMAC.SimpleDecryptWithPassword(payload, key);
if (String.IsNullOrWhiteSpace(decr) || !decr.Contains("@"))
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.BadRequest,
Body = "An email was not found in the confirmkey parameter",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
}
else
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.BadRequest,
Body = "Missing value for parameter `confirmkey`",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
}
else
{
return(new APIGatewayProxyResponse()
{
StatusCode = (int)HttpStatusCode.BadRequest,
Body = "Missing parameter `confirmkey`",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
});
}
FirestoreService FSS = new FirestoreService(logger);
await FSS.DeleteSubscriber(decr.ToLowerInvariant());
var response = new APIGatewayProxyResponse {
StatusCode = (int)HttpStatusCode.OK,
Body = "Ok! You've been unsubscribed and will no longer receive updates. If you change your mind, you can always sign up again at https://esk8bst.com",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
},
};
return(response);
}