/* TODO: Refactor to smaller functions
* Checks if the email needs to be parsed for Door Dash or GrubHub,
* and saves the order to file for reference
*/
private static Order HandleMessage(string messageId)
{
Debug.WriteLine("Handling message: " + messageId);
bool isGrubHubOrder = false;
string base64Input = null; //the input to be converted to base64url encoding format
string fileName = null; //the file name without the complete path
string storageDir = null; //the file saving directory
string filePath = null; //the full path to the file
var emailResponse = GetMessage(service, userId, messageId);
if (emailResponse == null)
{
Debug.WriteLine("Message deleted, returning");
return(null);
}
var headers = emailResponse.Payload.Headers;
MessagePartHeader dateHeader = headers.FirstOrDefault(item => item.Name == "Received");
MessagePartHeader fromHeader = headers.FirstOrDefault(item => item.Name == "From");
DateTime dateTime = ParseDateTime(dateHeader.Value);
string senderAddress = fromHeader.Value;
//Check if the email is from GrubHub
if (fromHeader.Value == "*****@*****.**")
{
Debug.WriteLine("Email Type: GrubHub");
isGrubHubOrder = true;
try {
var body = emailResponse.Payload.Body.Data;
base64Input = body;
fileName = messageId + ".html";
storageDir = GrubHubDir;
} catch (Exception e) {
Debug.WriteLine(e.Message);
}
//Otherwise check if the email is from DoorDash
}
else if (fromHeader.Value == @"DoorDash <*****@*****.**>")
{
Debug.WriteLine("Email Type: DoorDash");
try {
var attachId = emailResponse.Payload.Parts[1].Body.AttachmentId;
//Need to do another API call to get the actual attachment from the attachment id
MessagePartBody attachPart = GetAttachment(service, userId, messageId, attachId);
base64Input = attachPart.Data;
fileName = messageId + ".pdf";
storageDir = DoorDashDir;
}catch (Exception e) {
Debug.WriteLine(e.Message);
}
//The email is refers to a cancelled GrubHub order, so set the associated OrderCons' status to cancelled
}
else if (fromHeader.Value == "*****@*****.**")
{
Debug.WriteLine("From [email protected]");
MessagePartHeader subjectHeader = headers.FirstOrDefault(item => item.Name == "Subject");
string orderNum = subjectHeader.Value.Split(' ')[1]; //gets orderNum from ("Order" {orderNum} "Cancelled")
Debug.WriteLine("OrderNum: " + orderNum);
if (form1.InvokeRequired)
{
form1.Invoke((MethodInvoker) delegate { form1.SetOrderToCancelled(orderNum); });
}
else
{
form1.SetOrderToCancelled(orderNum);
}
return(null);
//The email is irrelevant
}
else
{
Debug.WriteLine("Not an order, returning");
return(null);
}
byte[] data = FromBase64ForUrlString(base64Input);
filePath = Path.Combine(storageDir, fileName);
//Saves the order to file if it doesn't exist
if (!File.Exists(filePath))
{
Debug.WriteLine("Writing new file: " + fileName);
File.WriteAllBytes(filePath, data);
}
else
{
Debug.WriteLine("File already exists: " + fileName);
}
Debug.WriteLine("----------------------");
if (isGrubHubOrder)
{
GrubHubParser grubHubParser = new GrubHubParser();
string decodedBody = Encoding.UTF8.GetString(data);
Order order = grubHubParser.ParseOrder(decodedBody, dateTime, messageId);
if (DebugPrint)
{
order.PrintOrder();
}
return(order);
}
else
{
DoorDashParser doorDashParser = new DoorDashParser();
List <string> lines = doorDashParser.ExtractTextFromPDF(filePath, messageId);
Order order = doorDashParser.ParseOrder(lines, dateTime, messageId);
string s = emailResponse.Payload.Parts[0].Parts[1].Body.Data;
byte[] data2 = FromBase64ForUrlString(emailResponse.Payload.Parts[0].Parts[1].Body.Data);
string decodedBody = Encoding.UTF8.GetString(data2);
doorDashParser.ParseConfirmURL(order, decodedBody);
if (DebugPrint)
{
order.PrintOrder();
}
return(order);
}
}
/* Extracts the order from an grubhub html file and returns an Order object */
public Order ParseOrder(string html, DateTime dateTime, string messageId)
{
Order order = new Order();
order.Service = "GrubHub";
order.TimeReceived = dateTime;
order.MessageId = messageId;
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(html);
//We begin setting the possible locations of the relevant information, and then choose which one depending on the format on the html doc
string metaInfoLoc1 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[3]/tbody/tr/th[2]/table/tbody/tr/th/div/div[2]/div/div";
string metaInfoLoc2 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[4]/tbody/tr/th[2]/table/tbody/tr/th/div/div/div/div";
string metaInfoLoc3 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[5]/tbody/tr/th[2]/table/tbody/tr/th/div/div/div/div";
string metaInfoBaseLoc1 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[3]";
string metaInfoBaseLoc2 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[4]";
string metaInfoBaseLoc3 = "//body/table/tbody/tr/td/table/tbody/tr/td/table[5]";
string delivMethodLoc1 = @"/tbody/tr/th/table/tbody/tr/th/div/div[2]/div/span/span";
string delivMethodLoc2 = @"/tbody/tr/th/table/tbody/tr/th/div/div/div/span/span";
string delivMethodLoc3 = @"/tbody/tr/th/table/tbody/tr/th/div/div/div/span/span";
string pickUpTimeLoc1 = @"/tbody/tr/th/table/tbody/tr/th/div/div[2]/div[2]/span";
string pickUpTimeLoc2 = @"/tbody/tr/th/table/tbody/tr/th/div/div/div[2]/span";
string pickUpTimeLoc3 = @"/tbody/tr/th/table/tbody/tr/th/div/div/div[2]/span";
HtmlNodeCollection metaInfoNodes = null;
HtmlNode deliveryMethodNode = null;
HtmlNode pickupTimeNode = null;
//If this is not null, the order is in standard format
if (htmlDoc.DocumentNode.SelectNodes(metaInfoLoc1) != null)
{
//Debug.WriteLine("Using Standard format");
metaInfoNodes = htmlDoc.DocumentNode.SelectNodes(metaInfoLoc1);
deliveryMethodNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc1 + delivMethodLoc1);
pickupTimeNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc1 + pickUpTimeLoc1);
}
//Otherwise the previous loc is null and there's an extra <table> "SCHEDULED ORDER" before the pickup/delivery <table>
//so we use location 2
else if (htmlDoc.DocumentNode.SelectNodes(metaInfoLoc2) != null)
{
//Debug.WriteLine("Using Scheduled Order format");
metaInfoNodes = htmlDoc.DocumentNode.SelectNodes(metaInfoLoc2);
deliveryMethodNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc2 + delivMethodLoc2);
pickupTimeNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc2 + pickUpTimeLoc2);
}
//Otherwise the previous loc is null and there's also an extra <table> "ORDER ADJUSTMENT" before the relevant <table>
//so we use location 3
else if (htmlDoc.DocumentNode.SelectNodes(metaInfoLoc3) != null)
{
//Debug.WriteLine("Using Adjusted Order format");
metaInfoNodes = htmlDoc.DocumentNode.SelectNodes(metaInfoLoc3);
deliveryMethodNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc3 + delivMethodLoc3);
pickupTimeNode = htmlDoc.DocumentNode.SelectSingleNode(metaInfoBaseLoc3 + pickUpTimeLoc3);
}
//If location 3 is still null, then the format is not recognized
else
{
//Debug.WriteLine("Cannot parse order - format not recognized");
return(null);
}
var orderNumberNode = htmlDoc.DocumentNode.SelectSingleNode("//body/table/tbody/tr/td/table/tbody/tr/td/table[2]/tbody/tr/th/table/tbody/tr/th/div/div[4]/span[2]");
ParseOrderNumber(orderNumberNode, order);
ParsePickUpTime(pickupTimeNode, order);
int metaDivCount = metaInfoNodes.Count; //the # of <div> elems
int nonItemCount = 5; //the last 5 <tr>'s of the <tbody> is meta information
int lastAddressIndex = metaDivCount - 3;
//We need to know whether it's DELIVERY or PICKUP because there's a difference in the html structure
if (deliveryMethodNode.InnerHtml.Trim() == "DELIVERY")
{
nonItemCount = 6;
}
else
{
order.DeliveryMethod = "Pickup";
}
var pickupByNameNode = metaInfoNodes.ElementAt(1);
ParsePickupName(pickupByNameNode, order);
ParseContactNumber(metaInfoNodes.ElementAt(metaDivCount - 1), order);
var orderContentNodes = htmlDoc.DocumentNode.SelectNodes("//td[@class='orderSummary__data']");
//order.UniqueItemCount = orderContentNodes.Count - nonItemCount;
//Loops through all the td nodes with class = "orderSummary__data"
//Parses itemName from td's with inner structure <div>
//Parses addOns from td's with inner structure <div> <ul>
//Does nothing for td's with no css child nodes
//Stops parsing when hitting the td with inner node <span>, or when there are no more tdNodes to scan
bool parsedItemName = false;
Item item = null;
for (int i = 0; i < orderContentNodes.Count; i++)
{
var tdNode = orderContentNodes[i];
string spanNodePath = tdNode.XPath + "/span";
var spanNode = tdNode.SelectSingleNode(spanNodePath);
if (spanNode != null)
{
//Debug.WriteLine("Hit td with <span> - breaking");
break;
}
var divNode = tdNode.Element("div");
if (divNode == null)
{
//Debug.WriteLine("No childs nodes - no addons");
continue;
}
if (divNode.Element("ul") != null)
{
//Debug.WriteLine("contains addOns");
ParseAddOns(divNode.Element("ul"), item);
}
else
{
//Since Special Instructions and ItemNames have the same html strucuture,
//we need manually check the innerHTML to decide which it is
if (divNode.InnerHtml.Trim().StartsWith("Instructions"))
{
ParseSpecialInstruction(divNode, item);
}
else
{
//Debug.WriteLine("is an itemName");
if (item != null)
{
order.ItemList.Add(item); //add the previous item if it's not null, then handle the new item
}
item = new Item();
ParseItemName(divNode, item);
ParseQuantity(tdNode, item);
ParseItemType(divNode, item);
}
}
//SetItemCount(i + 1, order.UniqueItemCount, item);
}
order.ItemList.Add(item); //add the last item since it won't be added without a next item
DoorDashParser.SetDrinkAndSnackCount(order);
DoorDashParser.SetOrderSize(order); //Need to move function to be general
ParseConfirmURL(order, htmlDoc);
return(order);
}
