/// <summary>
/// Creates a CSVRow instance for a given UPC with data collected from the input CSV file and the internet (if enabled)
/// </summary>
/// <param name="theRowIndex">Index of the row in the CSV</param>
private void LoadRow(int theRowIndex)
{
int count = 0;
using (var reader = new StreamReader(InputPath))
using (var csv = new CsvReader(reader))
{
try
{
csv.Configuration.RegisterClassMap <InputMap>();
// Get all the data
IEnumerable <CSVRow> records = csv.GetRecords <CSVRow>();
// Iterate through the data and lookup the UPCs
foreach (var rec in records)
{
// Once we are at the starting point, start scraping
if (count == theRowIndex)
{
Console.WriteLine("Scraping for index: " + theRowIndex.ToString() + ": " + rec.full_upc);
ScraperOutput output = new ScraperOutput();
output.desc = "";
output.upc = rec.full_upc;
// Normal scraping behavior if enabled
if (!isOffline)
{
output = ScrapeWeb(rec.full_upc, rec);
}
Console.WriteLine("ADD " + rec.full_upc.ToString() + " " + recordBuffer.Count);
recordBuffer.Add(new Tuple <CSVRow, ScraperOutput>(rec, output));
}
count++;
}
}
catch (HeaderValidationException e)
{
Console.WriteLine("ERROR: " + e.Message);
errorState = new Tuple <bool, string>(true, e.Message);
}
totalRecordsCount = count;
}
}
/// <summary>
/// Goes back one index, unused
/// </summary>
private void GetLastEntry()
{
Tuple <CSVRow, ScraperOutput> entry = webWorker.GetLastRow();
CSVRow row = entry.Item1;
ScraperOutput output = entry.Item2;
txtBrand.Text = row.brand2;
txtDesc.Text = row.desc2;
txtSignDesc.Text = row.sign;
txtUPC.Text = row.full_upc;
txtNewBrand.Text = row.brand;
txtNewDescription.Text = row.desc;
txtNotes.Text = "oops";
// Crucial to make sure we update this
webWorker.rowIndex--;
}
private ScraperOutput HandleWebError(string upc, bool switchOffline = false, string msg = "")
{
ScraperOutput output = new ScraperOutput();
if (switchOffline)
{
output.desc = "Internet connection failed, switching to Offline mode";
}
else
{
output.desc = "Web Error: " + msg;
}
output.upc = upc;
isOffline = switchOffline;
return(output);
}
/// <summary>
/// Loads the next item in the Record Buffer into the user application
/// </summary>
private void LoadNextEntry()
{
// If the web worker ran into an error, stop the progress
if (webWorker.errorState.Item1 == true)
{
LogText("[ERROR] " + webWorker.errorState.Item2);
return;
}
// Catch the end condition
if (webWorker.recordBuffer.Count == 0)
{
LogText("No more records left to populate!");
lblcsvIndex.Text = "All finished! Check the output file location.";
txtBrand.Text = "";
txtDesc.Text = "";
txtSignDesc.Text = "";
txtUPC.Text = "";
txtNewBrand.Text = "";
txtNewDescription.Text = "";
txtNotes.Text = "";
return;
}
// Get the next entry in the buffer
Tuple <CSVRow, ScraperOutput> entry = webWorker.recordBuffer[0];
CSVRow row = entry.Item1;
ScraperOutput output = entry.Item2;
// Makes sure that we convert all scientific notation back to real numbers
string upc = decimal.Parse(row.full_upc, System.Globalization.NumberStyles.Any).ToString();
// Make sure we didn't lose any leading zeros
while (upc.Length < 14)
{
upc = '0' + upc;
}
string currentUPC = upc;
string lastManu, currentManu;
string lastNoLeading = lastUPC.TrimStart('0');
string currentNoLeading = currentUPC.TrimStart('0');
// How many digits to check for uniqueness
int checkLength = 7;
// Get the manufacturer codes
if (lastNoLeading.Length > checkLength && currentNoLeading.Length > checkLength)
{
lastManu = lastNoLeading.Substring(0, checkLength);
currentManu = currentNoLeading.Substring(0, checkLength);
}
else
{
// These just have to be non-equal, doesn't matter the value
lastManu = "1";
currentManu = "-1";
}
// If the manufacturer codes are the same OR there are brand names and they are the same, keep the current brand name
if (lastManu == currentManu || (lastBrand.ToLower() == row.brand2.ToLower() && row.brand2 != ""))
{
//row.brand = txtNewBrand.Text;
}
lastBrand = row.brand2;
lastUPC = upc;
txtBrand.Text = row.brand2;
txtDesc.Text = row.desc2;
txtSignDesc.Text = row.sign != " " ? row.sign : row.pos;
txtUPC.Text = upc;
// Fill the new textboxes with the best data of the bunch
txtNewBrand.Text = (row.brand.Length != 0) ? row.brand : row.brand2;
txtNewDescription.Text = (row.desc.Length != 0) ? row.desc : output.desc;
txtNotes.Text = row.notes;
// Run the formatting logic
txtNewBrand.Text = toTitlecase(txtNewBrand.Text);
txtNewDescription.Text = DescriptionFormat(txtNewDescription.Text);
if (txtNewDescription.Text.ToLower() == "null")
{
txtNewDescription.Text = "";
}
btnNext.Enabled = true;
btnSkip.Enabled = true;
if (chkGoogleUPC.Checked)
{
System.Diagnostics.Process.Start("https://www.google.com/search?q=" + txtUPC.Text);
}
// Update the label letting the user know where they are
lblcsvIndex.Text = "Item #" + (webWorker.GetCurrentRowIndex()).ToString() + " of " + webWorker.totalRecordsCount.ToString() + " - Row #" + (webWorker.GetCurrentRowIndex() + 2).ToString();
}
/// <summary>
/// Scrapes the internet for product data for a given UPC and its matching CSV row
/// </summary>
/// <param name="upc">UPC to search for</param>
/// <param name="record">CSV record from the input file</param>
/// <returns></returns>
private ScraperOutput ScrapeWeb(string upc, CSVRow record)
{
ScraperOutput output;
// Go to the website for that UPC
string urlAddress = "https://www.barcodelookup.com/" + upc;
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlAddress);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode == HttpStatusCode.OK)
{
// Copy/pasted web stuff
Stream receiveStream = response.GetResponseStream();
StreamReader readStream = null;
if (response.CharacterSet == null)
{
readStream = new StreamReader(receiveStream);
}
else
{
readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));
}
// End Copy/pasted web stuff
string data = readStream.ReadToEnd();
//Console.WriteLine("Reading data (length #" + data.Length.ToString() + " characters)");
// The product name is in the page's meta tag
string startStr = "<meta name=\"description\" content=\"Barcode Lookup provides info on EAN ";
string endStr = "\">";
int startIndex = data.IndexOf(startStr);
// Check for invalid data
int failIndex = data.IndexOf("<meta name=\"description\" content=\"This barcode doesn't exist in our database. Please search for another barcode in the search box");
int badCodeIndex = data.IndexOf("\"This barcode number is not valid");
// Catch the scenarios where the website fails to provide a clear definition for the website
if (failIndex != -1 || badCodeIndex != -1 || startIndex == -1)
{
//Console.WriteLine("Could not find UPC");
output = new ScraperOutput();
output.desc = "null";
output.upc = upc;
return(output);
}
// If all has worked, grab the ending index
int endIndex = data.IndexOf(endStr, startIndex);
// Ignore the meta tag
startIndex += startStr.Length;
int grabLength = endIndex - startIndex;
// Grab the website's product name which consists of the EAN barcode and the name
string eanAndName = data.Substring(startIndex, grabLength);
// Apply my logic to format the title string into something user friendly
string name = formatProductDescription(eanAndName, record);
// Format and return the output
output = new ScraperOutput();
output.desc = name;
output.upc = upc;
return(output);
}
else
{
// If we are connected to the internet but the query fails, we try again next time
string err = "Web error code: " + response.StatusCode.ToString();
Console.WriteLine(err);
return(HandleWebError(upc, false, err));
}
}
catch (Exception e)
{
// If we are unable to connect to the internet, we go offline
Console.WriteLine("Error code: " + e.Message);
return(HandleWebError(upc, true));
}
}
