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diff --git a/email.go b/email.go
index da4590e..a44b253 100644
--- a/email.go
+++ b/email.go
@@ -1,462 +1,472 @@
/*
* Copyright © 2019-2021 Musing Studio LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package writefreely
import (
"database/sql"
"encoding/json"
"fmt"
+ "github.com/writefreely/writefreely/mailer"
"html/template"
"net/http"
"strings"
"time"
"github.com/aymerick/douceur/inliner"
"github.com/gorilla/mux"
"github.com/mailgun/mailgun-go"
stripmd "github.com/writeas/go-strip-markdown/v2"
"github.com/writeas/impart"
"github.com/writeas/web-core/data"
"github.com/writeas/web-core/log"
"github.com/writefreely/writefreely/key"
"github.com/writefreely/writefreely/spam"
)
const (
emailSendDelay = 15
)
type (
SubmittedSubscription struct {
CollAlias string
UserID int64
Email string `schema:"email" json:"email"`
Web bool `schema:"web" json:"web"`
Slug string `schema:"slug" json:"slug"`
From string `schema:"from" json:"from"`
}
EmailSubscriber struct {
ID string
CollID int64
UserID sql.NullInt64
Email sql.NullString
Subscribed time.Time
Token string
Confirmed bool
AllowExport bool
acctEmail sql.NullString
}
)
func (es *EmailSubscriber) FinalEmail(keys *key.Keychain) string {
if !es.UserID.Valid || es.Email.Valid {
return es.Email.String
}
decEmail, err := data.Decrypt(keys.EmailKey, []byte(es.acctEmail.String))
if err != nil {
log.Error("Error decrypting user email: %v", err)
return ""
}
return string(decEmail)
}
func (es *EmailSubscriber) SubscribedFriendly() string {
return es.Subscribed.Format("January 2, 2006")
}
func handleCreateEmailSubscription(app *App, w http.ResponseWriter, r *http.Request) error {
reqJSON := IsJSON(r)
vars := mux.Vars(r)
var err error
ss := SubmittedSubscription{
CollAlias: vars["alias"],
}
u := getUserSession(app, r)
if u != nil {
ss.UserID = u.ID
}
if reqJSON {
// Decode JSON request
decoder := json.NewDecoder(r.Body)
err = decoder.Decode(&ss)
if err != nil {
log.Error("Couldn't parse new subscription JSON request: %v\n", err)
return ErrBadJSON
}
} else {
err = r.ParseForm()
if err != nil {
log.Error("Couldn't parse new subscription form request: %v\n", err)
return ErrBadFormData
}
err = app.formDecoder.Decode(&ss, r.PostForm)
if err != nil {
log.Error("Continuing, but error decoding new subscription form request: %v\n", err)
//return ErrBadFormData
}
}
c, err := app.db.GetCollection(ss.CollAlias)
if err != nil {
log.Error("getCollection: %s", err)
return err
}
c.hostName = app.cfg.App.Host
from := c.CanonicalURL()
isAuthorBanned, err := app.db.IsUserSilenced(c.OwnerID)
if isAuthorBanned {
log.Info("Author is silenced, so subscription is blocked.")
return impart.HTTPError{http.StatusFound, from}
}
if ss.Web {
if u != nil && u.ID == c.OwnerID {
from = "/" + c.Alias + "/"
}
from += ss.Slug
}
if r.FormValue(spam.HoneypotFieldName()) != "" || r.FormValue("fake_password") != "" {
log.Info("Honeypot field was filled out! Not subscribing.")
return impart.HTTPError{http.StatusFound, from}
}
if ss.Email == "" && ss.UserID < 1 {
log.Info("No subscriber data. Not subscribing.")
return impart.HTTPError{http.StatusFound, from}
}
confirmed := app.db.IsSubscriberConfirmed(ss.Email)
es, err := app.db.AddEmailSubscription(c.ID, ss.UserID, ss.Email, confirmed)
if err != nil {
log.Error("addEmailSubscription: %s", err)
return err
}
// Send confirmation email if needed
if !confirmed {
err = sendSubConfirmEmail(app, c, ss.Email, es.ID, es.Token)
if err != nil {
log.Error("Failed to send subscription confirmation email: %s", err)
return err
}
}
if ss.Web {
session, err := app.sessionStore.Get(r, userEmailCookieName)
if err != nil {
// The cookie should still save, even if there's an error.
// Source: https://github.com/gorilla/sessions/issues/16#issuecomment-143642144
log.Error("Getting user email cookie: %v; ignoring", err)
}
if confirmed {
addSessionFlash(app, w, r, "<strong>Subscribed</strong>. You'll now receive future blog posts via email.", nil)
} else {
addSessionFlash(app, w, r, "Please check your email and <strong>click the confirmation link</strong> to subscribe.", nil)
}
session.Values[userEmailCookieVal] = ss.Email
err = session.Save(r, w)
if err != nil {
log.Error("save email cookie: %s", err)
return err
}
return impart.HTTPError{http.StatusFound, from}
}
return impart.WriteSuccess(w, "", http.StatusAccepted)
}
func handleDeleteEmailSubscription(app *App, w http.ResponseWriter, r *http.Request) error {
alias := collectionAliasFromReq(r)
vars := mux.Vars(r)
subID := vars["subscriber"]
email := r.FormValue("email")
token := r.FormValue("t")
slug := r.FormValue("slug")
isWeb := r.Method == "GET"
// Display collection if this is a collection
var c *Collection
var err error
if app.cfg.App.SingleUser {
c, err = app.db.GetCollectionByID(1)
} else {
c, err = app.db.GetCollection(alias)
}
if err != nil {
log.Error("Get collection: %s", err)
return err
}
from := c.CanonicalURL()
if subID != "" {
// User unsubscribing via email, so assume action is taken by either current
// user or not current user, and only use the request's information to
// satisfy this unsubscribe, i.e. subscriberID and token.
err = app.db.DeleteEmailSubscriber(subID, token)
} else {
// User unsubscribing through the web app, so assume action is taken by
// currently-auth'd user.
var userID int64
u := getUserSession(app, r)
if u != nil {
// User is logged in
userID = u.ID
if userID == c.OwnerID {
from = "/" + c.Alias + "/"
}
}
if email == "" && userID <= 0 {
// Get email address from saved cookie
session, err := app.sessionStore.Get(r, userEmailCookieName)
if err != nil {
log.Error("Unable to get email cookie: %s", err)
} else {
email = session.Values[userEmailCookieVal].(string)
}
}
if email == "" && userID <= 0 {
err = fmt.Errorf("No subscriber given.")
log.Error("Not deleting subscription: %s", err)
return err
}
err = app.db.DeleteEmailSubscriberByUser(email, userID, c.ID)
}
if err != nil {
log.Error("Unable to delete subscriber: %v", err)
return err
}
if isWeb {
from += slug
addSessionFlash(app, w, r, "<strong>Unsubscribed</strong>. You will no longer receive these blog posts via email.", nil)
return impart.HTTPError{http.StatusFound, from}
}
return impart.WriteSuccess(w, "", http.StatusAccepted)
}
func handleConfirmEmailSubscription(app *App, w http.ResponseWriter, r *http.Request) error {
alias := collectionAliasFromReq(r)
subID := mux.Vars(r)["subscriber"]
token := r.FormValue("t")
var c *Collection
var err error
if app.cfg.App.SingleUser {
c, err = app.db.GetCollectionByID(1)
} else {
c, err = app.db.GetCollection(alias)
}
if err != nil {
log.Error("Get collection: %s", err)
return err
}
from := c.CanonicalURL()
err = app.db.UpdateSubscriberConfirmed(subID, token)
if err != nil {
addSessionFlash(app, w, r, err.Error(), nil)
return impart.HTTPError{http.StatusFound, from}
}
addSessionFlash(app, w, r, "<strong>Confirmed</strong>! Thanks. Now you'll receive future blog posts via email.", nil)
return impart.HTTPError{http.StatusFound, from}
}
func emailPost(app *App, p *PublicPost, collID int64) error {
p.augmentContent()
// Do some shortcode replacement.
// Since the user is receiving this email, we can assume they're subscribed via email.
p.Content = strings.Replace(p.Content, "<!--emailsub-->", `<p id="emailsub">You're subscribed to email updates.</p>`, -1)
if p.HTMLContent == template.HTML("") {
p.formatContent(app.cfg, false, false)
}
p.augmentReadingDestination()
title := p.Title.String
if title != "" {
title = p.Title.String + "\n\n"
}
plainMsg := title + "A new post from " + p.CanonicalURL(app.cfg.App.Host) + "\n\n" + stripmd.Strip(p.Content)
plainMsg += `
---------------------------------------------------------------------------------
Originally published on ` + p.Collection.DisplayTitle() + ` (` + p.Collection.CanonicalURL() + `), a blog you subscribe to.
Sent to %recipient.to%. Unsubscribe: ` + p.Collection.CanonicalURL() + `email/unsubscribe/%recipient.id%?t=%recipient.token%`
gun := mailgun.NewMailgun(app.cfg.Email.Domain, app.cfg.Email.MailgunPrivate)
m := mailgun.NewMessage(p.Collection.DisplayTitle()+" <"+p.Collection.Alias+"@"+app.cfg.Email.Domain+">", stripmd.Strip(p.DisplayTitle()), plainMsg)
replyTo := app.db.GetCollectionAttribute(collID, collAttrLetterReplyTo)
if replyTo != "" {
m.SetReplyTo(replyTo)
}
subs, err := app.db.GetEmailSubscribers(collID, true)
if err != nil {
log.Error("Unable to get email subscribers: %v", err)
return err
}
if len(subs) == 0 {
return nil
}
if title != "" {
title = string(`<h2 id="title">` + p.FormattedDisplayTitle() + `</h2>`)
}
m.AddTag("New post")
fontFam := "Lora, Palatino, Baskerville, serif"
if p.IsSans() {
fontFam = `"Open Sans", Tahoma, Arial, sans-serif`
} else if p.IsMonospace() {
fontFam = `Hack, consolas, Menlo-Regular, Menlo, Monaco, monospace, monospace`
}
// TODO: move this to a templated file and LESS-generated stylesheet
fullHTML := `<html>
<head>
<style>
body {
font-size: 120%;
font-family: ` + fontFam + `;
margin: 1em 2em;
}
#article {
line-height: 1.5;
margin: 1.5em 0;
white-space: pre-wrap;
word-wrap: break-word;
}
h1, h2, h3, h4, h5, h6, p, code {
display: inline
}
img, iframe, video {
max-width: 100%
}
#title {
margin-bottom: 1em;
display: block;
}
.intro {
font-style: italic;
font-size: 0.95em;
}
div#footer {
text-align: center;
max-width: 35em;
margin: 2em auto;
}
div#footer p {
display: block;
font-size: 0.86em;
color: #666;
}
hr {
border: 1px solid #ccc;
margin: 2em 1em;
}
p#emailsub {
text-align: center;
display: inline-block !important;
width: 100%;
font-style: italic;
}
</style>
</head>
<body>
<div id="article">` + title + `<p class="intro">From <a href="` + p.CanonicalURL(app.cfg.App.Host) + `">` + p.DisplayCanonicalURL() + `</a></p>
` + string(p.HTMLContent) + `</div>
<hr />
<div id="footer">
<p>Originally published on <a href="` + p.Collection.CanonicalURL() + `">` + p.Collection.DisplayTitle() + `</a>, a blog you subscribe to.</p>
<p>Sent to %recipient.to%. <a href="` + p.Collection.CanonicalURL() + `email/unsubscribe/%recipient.id%?t=%recipient.token%">Unsubscribe</a>.</p>
</div>
</body>
</html>`
// inline CSS
html, err := inliner.Inline(fullHTML)
if err != nil {
log.Error("Unable to inline email HTML: %v", err)
return err
}
m.SetHtml(html)
log.Info("[email] Adding %d recipient(s)", len(subs))
for _, s := range subs {
e := s.FinalEmail(app.keys)
log.Info("[email] Adding %s", e)
err = m.AddRecipientAndVariables(e, map[string]interface{}{
"id": s.ID,
"to": e,
"token": s.Token,
})
if err != nil {
log.Error("Unable to add receipient %s: %s", e, err)
}
}
res, _, err := gun.Send(m)
log.Info("[email] Send result: %s", res)
if err != nil {
log.Error("Unable to send post email: %v", err)
return err
}
return nil
}
func sendSubConfirmEmail(app *App, c *Collection, email, subID, token string) error {
if email == "" {
return fmt.Errorf("You must supply an email to verify.")
}
// Send email
- gun := mailgun.NewMailgun(app.cfg.Email.Domain, app.cfg.Email.MailgunPrivate)
+ mlr, err := mailer.New(app.cfg.Email)
+ if err != nil {
+ return err
+ }
plainMsg := "Confirm your subscription to " + c.DisplayTitle() + ` (` + c.CanonicalURL() + `) to start receiving future posts. Simply click the following link (or copy and paste it into your browser):
` + c.CanonicalURL() + "email/confirm/" + subID + "?t=" + token + `
If you didn't subscribe to this site or you're not sure why you're getting this email, you can delete it. You won't be subscribed or receive any future emails.`
- m := mailgun.NewMessage(c.DisplayTitle()+" <"+c.Alias+"@"+app.cfg.Email.Domain+">", "Confirm your subscription to "+c.DisplayTitle(), plainMsg, fmt.Sprintf("<%s>", email))
+ m, err := mlr.NewMessage(c.DisplayTitle()+" <"+c.Alias+"@"+app.cfg.Email.Domain+">", "Confirm your subscription to "+c.DisplayTitle(), plainMsg, fmt.Sprintf("<%s>", email))
+ if err != nil {
+ return err
+ }
m.AddTag("Email Verification")
- m.SetHtml(`<html>
+ m.SetHTML(`<html>
<body style="font-family:Lora, 'Palatino Linotype', Palatino, Baskerville, 'Book Antiqua', 'New York', 'DejaVu serif', serif; font-size: 100%%; margin:1em 2em;">
<div style="font-size: 1.2em;">
<p>Confirm your subscription to <a href="` + c.CanonicalURL() + `">` + c.DisplayTitle() + `</a> to start receiving future posts:</p>
<p><a href="` + c.CanonicalURL() + `email/confirm/` + subID + `?t=` + token + `">Subscribe to ` + c.DisplayTitle() + `</a></p>
<p>If you didn't subscribe to this site or you're not sure why you're getting this email, you can delete it. You won't be subscribed or receive any future emails.</p>
</div>
</body>
</html>`)
- gun.Send(m)
+ err = mlr.Send(m)
+ if err != nil {
+ return err
+ }
return nil
}
diff --git a/mailer/mailer.go b/mailer/mailer.go
index fbc4dd6..1f9f86e 100644
--- a/mailer/mailer.go
+++ b/mailer/mailer.go
@@ -1,98 +1,105 @@
/*
* Copyright © 2024 Musing Studio LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package mailer
import (
"fmt"
"github.com/mailgun/mailgun-go"
"github.com/writefreely/writefreely/config"
mail "github.com/xhit/go-simple-mail/v2"
)
type (
// Mailer holds configurations for the preferred mailing provider.
Mailer struct {
smtp *mail.SMTPServer
mailGun *mailgun.MailgunImpl
}
// Message holds the email contents and metadata for the preferred mailing provider.
Message struct {
mgMsg *mailgun.Message
smtpMsg *mail.Email
}
)
// New creates a new Mailer from the instance's config.EmailCfg, returning an error if not properly configured.
-func New(eCfg *config.EmailCfg) (*Mailer, error) {
+func New(eCfg config.EmailCfg) (*Mailer, error) {
m := &Mailer{}
if eCfg.Domain != "" && eCfg.MailgunPrivate != "" {
m.mailGun = mailgun.NewMailgun(eCfg.Domain, eCfg.MailgunPrivate)
} else if eCfg.Username != "" && eCfg.Password != "" && eCfg.Host != "" && eCfg.Port > 0 {
m.smtp = mail.NewSMTPClient()
m.smtp.Host = eCfg.Host
m.smtp.Port = eCfg.Port
m.smtp.Username = eCfg.Username
m.smtp.Password = eCfg.Password
if eCfg.EnableStartTLS {
m.smtp.Encryption = mail.EncryptionSTARTTLS
}
} else {
return nil, fmt.Errorf("no email provider is configured")
}
return m, nil
}
// NewMessage creates a new Message from the given parameters.
func (m *Mailer) NewMessage(from, subject, text string, to ...string) (*Message, error) {
msg := &Message{}
if m.mailGun != nil {
msg.mgMsg = m.mailGun.NewMessage(from, subject, text, to...)
} else if m.smtp != nil {
msg.smtpMsg = mail.NewMSG()
msg.smtpMsg.SetFrom(from)
msg.smtpMsg.AddTo(to...)
msg.smtpMsg.SetSubject(subject)
msg.smtpMsg.AddAlternative(mail.TextPlain, text)
if msg.smtpMsg.Error != nil {
return nil, msg.smtpMsg.Error
}
}
return msg, nil
}
// SetHTML sets the body of the message.
func (m *Message) SetHTML(html string) {
if m.smtpMsg != nil {
m.smtpMsg.SetBody(mail.TextHTML, html)
} else if m.mgMsg != nil {
m.mgMsg.SetHtml(html)
}
}
+// AddTag attaches a tag to the Message for providers that support it.
+func (m *Message) AddTag(tag string) {
+ if m.mgMsg != nil {
+ m.mgMsg.AddTag(tag)
+ }
+}
+
// Send sends the given message via the preferred provider.
func (m *Mailer) Send(msg *Message) error {
if m.smtp != nil {
client, err := m.smtp.Connect()
if err != nil {
return err
}
return msg.smtpMsg.Send(client)
} else if m.mailGun != nil {
_, _, err := m.mailGun.Send(msg.mgMsg)
if err != nil {
return err
}
}
return nil
}

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