Email delivery tweaks

pkg/config/config.go

@@ -50,6 +50,7 @@ const (
 	ResetPasswordRedisKey = "reset-password/%s"
 	ChangeEmailRedisKey   = "change-email/%s"
 	SignupTokenExpires    = 24 * time.Hour // used for all tokens so far
+	EmailDebounceExpires  = 24 * time.Hour // how to rate limit duplicate mail being sent
 
 	// Rate limits
 	RateLimitRedisKey        = "rate-limit/%s/%s" // namespace, id

pkg/controller/account/signup.go

@@ -139,24 +139,29 @@ func Signup() http.HandlerFunc {
 			}
 
 			// Already an account?
-			if _, err := models.FindUser(email); err == nil {
+			if user, err := models.FindUser(email); err == nil {
 				// We don't want to admit that the email already is registered, so send an email to the
 				// address in case the user legitimately forgot, but flash the regular success message.
-				if err := mail.LockSending("signup", email, config.SignupTokenExpires); err == nil {
-					err := mail.Send(mail.Message{
-						To:       email,
-						Subject:  "You already have a nonshy account",
-						Template: "email/already_signed_up.html",
-						Data: map[string]interface{}{
-							"Title": config.Title,
-							"URL":   config.Current.BaseURL + "/forgot-password",
-						},
-					})
-					if err != nil {
-						session.FlashError(w, r, "Error sending an email: %s", err)
-					}
+				if user.IsBanned() {
+					log.Error("Do not send signup e-mail to %s: user is banned", email)
 				} else {
-					log.Error("LockSending: signup e-mail is not sent to %s: one was sent recently", email)
+					if err := mail.LockSending("signup", email, config.EmailDebounceExpires); err == nil {
+						err := mail.Send(mail.Message{
+							To:       email,
+							Subject:  "You already have a nonshy account",
+							Template: "email/already_signed_up.html",
+							Data: map[string]interface{}{
+								"Title": config.Title,
+								"URL":   config.Current.BaseURL + "/forgot-password",
+							},
+						})
+						if err != nil {
+							session.FlashError(w, r, "Error sending an email: %s", err)
+						}
+
+					} else {
+						log.Error("LockSending: signup e-mail is not sent to %s: one was sent recently", email)
+					}
 				}
 
 				session.Flash(w, r, "We have sent an e-mail to %s with a link to continue signing up your account. Please go and check your e-mail.", email)

pkg/controller/photo/certification.go

@@ -434,17 +434,21 @@ func AdminCertification() http.HandlerFunc {
 					}
 
 					// Notify the user via email.
-					if err := mail.Send(mail.Message{
-						To:       user.Email,
-						Subject:  "Your certification photo has been rejected",
-						Template: "email/certification_rejected.html",
-						Data: map[string]interface{}{
-							"Username":     user.Username,
-							"AdminComment": comment,
-							"URL":          config.Current.BaseURL + "/photo/certification",
-						},
-					}); err != nil {
-						session.FlashError(w, r, "Note: failed to email user about the rejection: %s", err)
+					if err := mail.LockSending("cert_rejected", user.Email, config.EmailDebounceExpires); err == nil {
+						if err := mail.Send(mail.Message{
+							To:       user.Email,
+							Subject:  "Your certification photo has been denied",
+							Template: "email/certification_rejected.html",
+							Data: map[string]interface{}{
+								"Username":     user.Username,
+								"AdminComment": comment,
+								"URL":          config.Current.BaseURL + "/photo/certification",
+							},
+						}); err != nil {
+							session.FlashError(w, r, "Note: failed to email user about the rejection: %s", err)
+						}
+					} else {
+						log.Error("LockSending: cert_rejected e-mail is not sent to %s: one was sent recently", user.Email)
 					}
 				}
 
@@ -503,16 +507,20 @@ func AdminCertification() http.HandlerFunc {
 				}
 
 				// Notify the user via email.
-				if err := mail.Send(mail.Message{
-					To:       user.Email,
-					Subject:  "Your certification photo has been approved!",
-					Template: "email/certification_approved.html",
-					Data: map[string]interface{}{
-						"Username": user.Username,
-						"URL":      config.Current.BaseURL,
-					},
-				}); err != nil {
-					session.FlashError(w, r, "Note: failed to email user about the approval: %s", err)
+				if err := mail.LockSending("cert_approved", user.Email, config.EmailDebounceExpires); err == nil {
+					if err := mail.Send(mail.Message{
+						To:       user.Email,
+						Subject:  "Your certification photo has been approved!",
+						Template: "email/certification_approved.html",
+						Data: map[string]interface{}{
+							"Username": user.Username,
+							"URL":      config.Current.BaseURL,
+						},
+					}); err != nil {
+						session.FlashError(w, r, "Note: failed to email user about the approval: %s", err)
+					}
+				} else {
+					log.Error("LockSending: cert_approved e-mail is not sent to %s: one was sent recently", user.Email)
 				}
 
 				// Log the change.

pkg/models/user.go

@@ -226,6 +226,11 @@ func IsValidUsername(username string) error {
 	return nil
 }
 
+// IsBanned returns if the user account is banned.
+func (u *User) IsBanned() bool {
+	return u.Status == UserStatusBanned
+}
+
 // IsShyFrom tells whether the user is shy from the perspective of the other user.
 //
 // That is, depending on our profile visibility and friendship status.

web/templates/email/certification_rejected.html

@@ -3,7 +3,7 @@
     <body bakground="#ffffff" color="#000000" link="#0000FF" vlink="#990099" alink="#FF0000">
         <basefont face="Arial,Helvetica,sans-serif" size="3" color="#000000"></basefont>
 
-        <h1>Your certification photo has been rejected</h1>
+        <h1>Your certification photo has been denied</h1>
 
         <p>Dear {{.Data.Username}},</p>