private async Task SendAlert(MonitoredHistoryItem item)
{
MonitoredItem monitoredItem = await _context.MonitoredItems.Include(a => a.User).FirstOrDefaultAsync(a => a.MonitItemId == item.MonitoredItemId);
User user = await _context.Users.FindAsync(monitoredItem.User.Id);
MailSender sender = new MailSender(_mailSettings);
await sender.sendAllert(user.EMail, monitoredItem.Url);
}
private MonitoredHistoryItem CompareWebPages()
{
if (_item.ElementName == "")
{
MonitoredHistoryItem historyItem = new MonitoredHistoryItem(_item.MonitItemId, _oldWebPage, _newWebPage);
HTMLCompareResult compareResult = HTMLMenager.HTMLDocumentCompare(_oldWebPage, _newWebPage);
if (compareResult.Type == 1)
{
historyItem.SetTypeError(compareResult.Message);
}
;
if (compareResult.Type == 2)
{
historyItem.SetTypeError(compareResult.Message);
_oldWebPage = _newWebPage;
}
;
if (compareResult.Type == 3)
{
historyItem.SetTypeNothingChanges(compareResult.Message);
}
;
return(historyItem);
}
else
{
_newNode = _newWebPage.GetElementbyId(_item.ElementName);
MonitoredHistoryItem historyItem = new MonitoredHistoryItem(_item.MonitItemId, _oldNode, _newNode);
HTMLCompareResult compareResult = HTMLMenager.HTMLNodeCompare(_oldNode, _newNode);
if (compareResult.Type == 1)
{
historyItem.SetTypeError(compareResult.Message);
}
;
if (compareResult.Type == 2)
{
historyItem.SetTypeError(compareResult.Message);
_oldNode = _newNode;
}
;
if (compareResult.Type == 3)
{
historyItem.SetTypeNothingChanges(compareResult.Message);
}
;
return(historyItem);
}
}
private async void timer_Elapsed(object sender, ElapsedEventArgs e)
{
_timer.Stop();
_newWebPage = new HtmlDocument();
_newWebPage.LoadHtml(HTMLMenager.GetHtmlPage(_item.Url));
MonitoredHistoryItem historyItem = CompareWebPages();
await SaveToDatabase(historyItem);
if (historyItem.Type == 2)
{
await SendAlert(historyItem);
}
_timer.Start();
}
private bool PrepareDetection()
{
_oldWebPage = new HtmlDocument();
_oldWebPage.LoadHtml(HTMLMenager.GetHtmlPage(_item.Url));
if (_item.ElementName != "")
{
_oldNode = _oldWebPage.GetElementbyId(_item.ElementName);
if (_oldNode == null)
{
MonitoredHistoryItem historyitem = new MonitoredHistoryItem(_item.MonitItemId);
historyitem.SetTypeError("Cant find element on website ");
SaveToDatabase(historyitem);
// HistoryChange(this, myArg);
return(false);
}
}
return(true);
}
private async Task SaveToDatabase(MonitoredHistoryItem item)
{
await _context.MonitoredHistory.AddAsync(item);
await _context.SaveChangesAsync();
}
