private async Task <Response> SendEmails(EmailTemplate emailTemplate, int numberOfDays, List <EmailAddress> emailAddresses, User user, DateTime date)
{
try
{
EmailClient eClient = new EmailClient();
SendGridClient client = new SendGridClient(eClient.SetEnvironmentVar(user));
List <SendGrid.Helpers.Mail.Attachment> attachmentList = new List <SendGrid.Helpers.Mail.Attachment>();
EmailAttachments emailAttachments = new EmailAttachments();
EmailBody body = new EmailBody()
{
/// HtmlContent je celkovo obsah emailu, <br/> je nutne pridat kvoli tomu, aby email obsahoval nove riadky. Na konci je priadnie
/// emailoveho podpisu.
HtmlContent = emailTemplate.EmailContent.Replace("\u00A0", "<br/>") + "<br/> <br/> " + user.Signature.Replace("\u00A0", "<br/>"),
Subject = emailTemplate.EmailSubject,
To = emailAddresses
};
using (StudentDBDataContext con = new StudentDBDataContext(conn_str))
{
var attachments = con.GetTable <Attachment>().Where(x => x.IdUser == user.Id && x.IdEmailTemplate == emailTemplate.Id);
foreach (var files in attachments)
{
/// Zistovanie, ci subor, ktoreho cestu budeme brat z DB vobec existuje
if (File.Exists(files.FilePath))
{
var bytes = File.ReadAllBytes(files.FilePath);
var file = Convert.ToBase64String(bytes);
// Ziskanie typu suboru, aby mohol byt uploadnuty
var type = emailAttachments.GetMIMEType(files.FilePath);
/// Pridanie prilohy,
SendGrid.Helpers.Mail.Attachment attachment = new SendGrid.Helpers.Mail.Attachment()
{
Content = file,
Filename = (string)files.FileName,
Type = type
};
attachmentList.Add(attachment);
}
else
{
continue;
}
}
}
/// Vytvorenie emailu pre viacero prijemcov
var msg = MailHelper.CreateSingleEmailToMultipleRecipients(MailHelper.StringToEmailAddress(user.Email), body.To, body.Subject, body.HtmlContent, body.HtmlContent);
// Dates je premenna, ktora urcuje o kolko dni skor ma byt odoslana sprava
var dates = date.AddDays(-numberOfDays);
// Prevod z datumu do Unix sekund ( Sendgrid takto akceptuje parameter SendAt
var unixDate = new DateTimeOffset(dates.Year, dates.Month, dates.Day, dates.Hour, dates.Minute, dates.Second, TimeSpan.Zero).ToUnixTimeSeconds();
/// Minus jedna hodina kvoli casovemu posunu Web API
msg.SetSendAt((int)unixDate - 3600);
if (attachmentList.Count >= 1)
{
// Pridanie priloh do tela emailu
msg.AddAttachments(attachmentList);
}
Logger newLog = new Logger();
newLog.LogEmail(date, body.To, body.Subject, body.HtmlContent, attachmentList);
// asynchronne odoslanie poziadavky na web api
var result = await client.SendEmailAsync(msg);
attachmentList.Clear();
emailAddresses.Clear();
return(result);
}
catch (Exception ex)
{
Logger newLog = new Logger();
newLog.LogError(ex);
MessageBox.Show(ex.ToString());
return(null);
}
}
public async void AutomatedEmailSending(User user)
{
try
{
EmailClient eClient = new EmailClient();
if (string.IsNullOrEmpty(user.ApiKey))
{
return;
}
SendGridClient client = new SendGridClient(eClient.SetEnvironmentVar(user));
using (StudentDBDataContext con = new StudentDBDataContext(conn_str))
{
var activity = con.GetTable <Activity>().Where(chck => chck.IdUser == user.Id);
/// Zoskupenie aktivit na zaklade mena aktivity a datumu odovzdania. aby sa mohli odosielat presne emaily, a iba tam, kde,
/// bolo oznacene odosielanie emailovych upozorneni.
var selectActivity = from act in activity
where act.IdUser == user.Id && act.EmailSendingActive == true || act.SendMe == true
group act by new { act.Deadline, act.ActivityName };
if (selectActivity == null || selectActivity.Count() <= 0)
{
return;
}
///Prehladavanie kazdej skupiny
foreach (var group in selectActivity)
{
// Prehladavanie jednotlivych aktivit v skupine, aby sme zistili ci ma student dostat upozornenie
foreach (var act in group)
{
var days = ((act.Deadline.Subtract(DateTime.Now).TotalDays));
switch (act.EmailSendingActive)
{
/// Odosielanie prvych upozorneni ak do odovzdania zostavaju 3 alebo 2 dni
case true when days <= 3 && days > 1 && act.SendFirst == true && act.Hodnotene == false:
{
firstReminderAddresses.Add(MailHelper.StringToEmailAddress(act.Student.Email));
Activity currAct = con.GetTable <Activity>().Where(x => x.Id == act.Id).FirstOrDefault();
currAct.SendFirst = false;
con.SubmitChanges(ConflictMode.ContinueOnConflict);
break;
}
/// Zbieranie emailovych adries na odoslanie druhych upozorneni ak do odovzdania zostavaju 1 alebo 0 dni
case true when days >= 0 && days < 1 && act.SendSecond == true && act.Hodnotene == false:
{
secondReminderAddresses.Add(MailHelper.StringToEmailAddress(act.Student.Email));
Activity currAct = con.GetTable <Activity>().Where(x => x.Id == act.Id).FirstOrDefault();
currAct.SendSecond = false;
currAct.EmailSendingActive = false;
con.SubmitChanges(ConflictMode.ContinueOnConflict);
break;
}
default:
break;
}
if (act.SendMe == true && act.Hodnotene == false && days <= 0)
{
Activity currAct = con.GetTable <Activity>().Where(x => x.Id == act.Id).FirstOrDefault();
currAct.SendMe = false;
con.SubmitChanges();
SendToMe = true;
activitiesToGrade.Add(act.ActivityName);
groupsToSend.Add(act.StudentSkupina.Nazov);
}
}
/// Ziskanie emailu, ktory ma byt odoslany pre konkretnu aktivitu
if (firstReminderAddresses.Count >= 1)
{
var emailToSend = group.Select(x => x.IdFirstRem);
var template = con.GetTable <EmailTemplate>().Where(x => x.IdUser == user.Id && x.Id == emailToSend.FirstOrDefault()).FirstOrDefault();
await SendEmails(template, 3, firstReminderAddresses, user, group.Key.Deadline);
}
if (secondReminderAddresses.Count >= 1)
{
var emailToSend = group.Select(x => x.IdSecRem);
var template = con.GetTable <EmailTemplate>().Where(x => x.IdUser == user.Id && x.Id == emailToSend.FirstOrDefault()).FirstOrDefault();
await SendEmails(template, 1, secondReminderAddresses, user, group.Key.Deadline);
}
}
if (SendToMe == true)
{
string activities = string.Empty;
string groups = string.Empty;
foreach (var group in groupsToSend.Distinct())
{
groups = groups + group + ", ";
}
foreach (var activ in activitiesToGrade.Distinct())
{
activities += (activ + ", <br/>");
}
string finalMsg = $"Uplynul dátum odovzdania pre následujúce aktivity: {activities}<br/>";
string subject = $"Aktivita pripravená na hodnotenie pre skupiny: {groups}";
var msg = MailHelper.CreateSingleEmail(MailHelper.StringToEmailAddress(user.Email), MailHelper.StringToEmailAddress(user.Email)
, subject, finalMsg, finalMsg);
var result = await client.SendEmailAsync(msg);
SendToMe = false;
}
}
}
catch (Exception ex)
{
Logger newLog = new Logger();
newLog.LogError(ex);
return;
}
}
private async void OdoslatBtnSendForm_Click(object sender, EventArgs e)
{
try
{
Logger logger = new Logger();
EmailClient eClient = new EmailClient();
if (string.IsNullOrEmpty(currentUser.ApiKey))
{
MessageBox.Show("ApiKey nemôže byť prázdny.");
return;
}
SendGridClient client = new SendGridClient(eClient.SetEnvironmentVar(currentUser));
EmailBody body = new EmailBody()
{
HtmlContent = richTextBox1.Text.Replace("\u00A0", "<br/>") + "<br/> <br/> " + currentUser.Signature.Replace("\u00A0", "<br/>"),
PlainTextContent = richTextBox1.Text,
Subject = subjectTextBox.Text,
To = emailAddList
};
if (body.Subject != string.Empty && body.PlainTextContent != string.Empty && emailAddList != null)
{
if (SelectAllBtnPrimaryEmail.Checked == true && SelectAllSecondaryEmail.Checked == false && GroupCheckBtn.Checked == false)
{
using (StudentDBDataContext con = new StudentDBDataContext(conn_str))
{
emailAddList.Clear();
var students = con.GetTable <Student>();
var skup = from student in students where student.ID_stud_skupina == currentGroup.Id select student.Email;
foreach (var mail in skup)
{
emailAddList.Add(MailHelper.StringToEmailAddress(RWS(mail)));
}
}
}
else if (SelectAllBtnPrimaryEmail.Checked == false && SelectAllSecondaryEmail.Checked == true && GroupCheckBtn.Checked == false)
{
using (StudentDBDataContext con = new StudentDBDataContext(conn_str))
{
emailAddList.Clear();
var students = con.GetTable <Student>();
var skup = from student in students where student.ID_stud_skupina == currentGroup.Id select student.Email_UCM;
foreach (var mail in skup)
{
emailAddList.Add(MailHelper.StringToEmailAddress(RWS(mail)));
}
}
}
else if (SelectAllBtnPrimaryEmail.Checked == false && SelectAllSecondaryEmail.Checked == false && GroupCheckBtn.Checked == true)
{
using (StudentDBDataContext con = new StudentDBDataContext(conn_str))
{
emailAddList.Clear();
var students = con.GetTable <Student>();
var skup = from student in students
where student.ID_stud_skupina == currentGroup.Id && student.ID_Kruzok == GroupComboEmail.Text
select student.Email;
foreach (var mail in skup)
{/// Nastavene na osobny email
emailAddList.Add(MailHelper.StringToEmailAddress(RWS(mail)));
}
}
}
else
{
emailAddList.Clear();
ToTextBox.Text.Replace(" ", string.Empty);
var splitted = ToTextBox.Text.Split(',');
splitted.ToList();
foreach (var mail in splitted)
{
emailAddList.Add(MailHelper.StringToEmailAddress(RWS(mail)));
}
}
}
else
{
MessageBox.Show("Niektorá časť nie je vyplnená. Prosím skontrolujte správu, ktorú chcete odoslať a uistite sa subjekt alebo správa nie sú prázdne", "Prázdne polia");
return;
}
var msg = MailHelper.CreateSingleEmailToMultipleRecipients(MailHelper.StringToEmailAddress(currentUser.Email), body.To, body.Subject, body.HtmlContent, body.HtmlContent);
if (attachmentList.Count >= 1)
{
msg.AddAttachments(attachmentList);
}
var result = await client.SendEmailAsync(msg);
if (result.StatusCode == System.Net.HttpStatusCode.Accepted)
{
logger.LogEmail(DateTime.Now, body.To, body.Subject, body.HtmlContent, attachmentList);
attachmentList.Clear();
MessageBox.Show("Email bol úspešne prijatý", "Status");
}
else
{
MessageBox.Show("Email nebol úspešne odoslaný\n " + "Status emailu: " + result.StatusCode.ToString(), "Chyba", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
ToTextBox.Text = "";
subjectTextBox.Text = "";
richTextBox1.Text = "";
AttachmentsGrid.DataSource = null;
emailAddList.Clear();
}
catch (Exception ex)
{
Logger newLog = new Logger();
newLog.LogError(ex);
MessageBox.Show(ex.Message);
}
}