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penpot/backend/src/app/emails.clj
2022-09-28 11:30:48 +02:00

442 lines
14 KiB
Clojure

;; This Source Code Form is subject to the terms of the Mozilla Public
;; License, v. 2.0. If a copy of the MPL was not distributed with this
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
;;
;; Copyright (c) KALEIDOS INC
(ns app.emails
"Main api for send emails."
(:require
[app.common.exceptions :as ex]
[app.common.logging :as l]
[app.common.pprint :as pp]
[app.common.spec :as us]
[app.config :as cf]
[app.db :as db]
[app.db.sql :as sql]
[app.emails.invite-to-team :as-alias emails.invite-to-team]
[app.metrics :as mtx]
[app.util.template :as tmpl]
[app.worker :as wrk]
[clojure.java.io :as io]
[clojure.spec.alpha :as s]
[cuerdas.core :as str]
[integrant.core :as ig])
(:import
jakarta.mail.Message$RecipientType
jakarta.mail.Session
jakarta.mail.Transport
jakarta.mail.internet.InternetAddress
jakarta.mail.internet.MimeBodyPart
jakarta.mail.internet.MimeMessage
jakarta.mail.internet.MimeMultipart
java.util.Properties))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; EMAIL IMPL
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defn- parse-address
[v]
(InternetAddress/parse ^String v))
(defn- resolve-recipient-type
^Message$RecipientType
[type]
(case type
:to Message$RecipientType/TO
:cc Message$RecipientType/CC
:bcc Message$RecipientType/BCC))
(defn- assign-recipient
[^MimeMessage mmsg type address]
(if (sequential? address)
(reduce #(assign-recipient %1 type %2) mmsg address)
(let [address (parse-address address)
type (resolve-recipient-type type)]
(.addRecipients mmsg type address)
mmsg)))
(defn- assign-recipients
[mmsg {:keys [to cc bcc] :as params}]
(cond-> mmsg
(some? to) (assign-recipient :to to)
(some? cc) (assign-recipient :cc cc)
(some? bcc) (assign-recipient :bcc bcc)))
(defn- assign-from
[mmsg {:keys [default-from]} {:keys [from] :as props}]
(let [from (or from default-from)]
(when from
(let [from (parse-address from)]
(.addFrom ^MimeMessage mmsg from)))))
(defn- assign-reply-to
[mmsg {:keys [default-reply-to] :as cfg} {:keys [reply-to] :as params}]
(let [reply-to (or reply-to default-reply-to)]
(when reply-to
(let [reply-to (parse-address reply-to)]
(.setReplyTo ^MimeMessage mmsg reply-to)))))
(defn- assign-subject
[mmsg {:keys [subject charset] :or {charset "utf-8"} :as params}]
(assert (string? subject) "subject is mandatory")
(.setSubject ^MimeMessage mmsg
^String subject
^String charset))
(defn- assign-extra-headers
[^MimeMessage mmsg {:keys [headers extra-data] :as params}]
(let [headers (assoc headers "X-Penpot-Data" extra-data)]
(reduce-kv (fn [^MimeMessage mmsg k v]
(doto mmsg
(.addHeader (name k) (str v))))
mmsg
headers)))
(defn- assign-body
[^MimeMessage mmsg {:keys [body charset] :or {charset "utf-8"}}]
(let [mpart (MimeMultipart. "mixed")]
(cond
(string? body)
(let [bpart (MimeBodyPart.)]
(.setContent bpart ^String body (str "text/plain; charset=" charset))
(.addBodyPart mpart bpart))
(vector? body)
(let [mmp (MimeMultipart. "alternative")
mbp (MimeBodyPart.)]
(.addBodyPart mpart mbp)
(.setContent mbp mmp)
(doseq [item body]
(let [mbp (MimeBodyPart.)]
(.setContent mbp
^String (:content item)
^String (str (:type item "text/plain") "; charset=" charset))
(.addBodyPart mmp mbp))))
(map? body)
(let [bpart (MimeBodyPart.)]
(.setContent bpart
^String (:content body)
^String (str (:type body "text/plain") "; charset=" charset))
(.addBodyPart mpart bpart))
:else
(throw (ex-info "Unsupported type" {:body body})))
(.setContent mmsg mpart)
mmsg))
(defn- opts->props
[{:keys [username tls host port timeout default-from]
:or {timeout 30000}
:as opts}]
(reduce-kv
(fn [^Properties props k v]
(if (nil? v)
props
(doto props (.put ^String k ^String (str v)))))
(Properties.)
{"mail.user" username
"mail.host" host
"mail.debug" (contains? cf/flags :smtp-debug)
"mail.from" default-from
"mail.smtp.auth" (boolean username)
"mail.smtp.starttls.enable" tls
"mail.smtp.starttls.required" tls
"mail.smtp.host" host
"mail.smtp.port" port
"mail.smtp.user" username
"mail.smtp.timeout" timeout
"mail.smtp.connectiontimeout" timeout}))
(defn- create-smtp-session
[opts]
(let [props (opts->props opts)]
(Session/getInstance props)))
(defn- create-smtp-message
^MimeMessage
[cfg session params]
(let [mmsg (MimeMessage. ^Session session)]
(assign-recipients mmsg params)
(assign-from mmsg cfg params)
(assign-reply-to mmsg cfg params)
(assign-subject mmsg params)
(assign-extra-headers mmsg params)
(assign-body mmsg params)
(.saveChanges ^MimeMessage mmsg)
mmsg))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TEMPLATE EMAIL IMPL
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(def ^:private email-path "app/emails/%(id)s/%(lang)s.%(type)s")
(defn- render-email-template-part
[type id context]
(let [lang (:lang context :en)
path (str/format email-path {:id (name id)
:lang (name lang)
:type (name type)})]
(some-> (io/resource path)
(tmpl/render context))))
(defn- build-email-template
[id context]
(let [subj (render-email-template-part :subj id context)
text (render-email-template-part :txt id context)
html (render-email-template-part :html id context)]
(when (or (not subj)
(and (not text)
(not html)))
(ex/raise :type :internal
:code :missing-email-templates))
{:subject subj
:body (into
[{:type "text/plain"
:content text}]
(when html
[{:type "text/html"
:content html}]))}))
(s/def ::priority #{:high :low})
(s/def ::to (s/or :single ::us/email
:multi (s/coll-of ::us/email)))
(s/def ::from ::us/email)
(s/def ::reply-to ::us/email)
(s/def ::lang string?)
(s/def ::extra-data ::us/string)
(s/def ::context
(s/keys :req-un [::to]
:opt-un [::reply-to ::from ::lang ::priority ::extra-data]))
(defn template-factory
([id] (template-factory id {}))
([id extra-context]
(s/assert keyword? id)
(fn [context]
(us/verify ::context context)
(when-let [spec (s/get-spec id)]
(s/assert spec context))
(let [context (merge (if (fn? extra-context)
(extra-context)
extra-context)
context)
email (build-email-template id context)]
(when-not email
(ex/raise :type :internal
:code :email-template-does-not-exists
:hint "seems like the template is wrong or does not exists."
:context {:id id}))
(cond-> (assoc email :id (name id))
(:extra-data context)
(assoc :extra-data (:extra-data context))
(:from context)
(assoc :from (:from context))
(:reply-to context)
(assoc :reply-to (:reply-to context))
(:to context)
(assoc :to (:to context)))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; PUBLIC HIGH-LEVEL API
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defn render
[email-factory context]
(email-factory context))
(defn send!
"Schedule an already defined email to be sent using asynchronously
using worker task."
[{:keys [::conn ::factory] :as context}]
(us/verify fn? factory)
(us/verify some? conn)
(let [email (factory context)]
(wrk/submit! (assoc email
::wrk/task :sendmail
::wrk/delay 0
::wrk/max-retries 4
::wrk/priority 200
::wrk/conn conn))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; SENDMAIL FN / TASK HANDLER
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(s/def ::username ::cf/smtp-username)
(s/def ::password ::cf/smtp-password)
(s/def ::tls ::cf/smtp-tls)
(s/def ::ssl ::cf/smtp-ssl)
(s/def ::host ::cf/smtp-host)
(s/def ::port ::cf/smtp-port)
(s/def ::default-reply-to ::cf/smtp-default-reply-to)
(s/def ::default-from ::cf/smtp-default-from)
(s/def ::smtp-config
(s/keys :opt-un [::username
::password
::tls
::ssl
::host
::port
::default-from
::default-reply-to]))
(declare send-to-logger!)
(s/def ::sendmail fn?)
(defmethod ig/pre-init-spec ::sendmail [_]
(s/spec ::smtp-config))
(defmethod ig/init-key ::sendmail
[_ cfg]
(fn [params]
(when (contains? cf/flags :smtp)
(let [session (create-smtp-session cfg)]
(with-open [transport (.getTransport session (if (:ssl cfg) "smtps" "smtp"))]
(.connect ^Transport transport
^String (:username cfg)
^String (:password cfg))
(let [^MimeMessage message (create-smtp-message cfg session params)]
(.sendMessage ^Transport transport
^MimeMessage message
(.getAllRecipients message))))))
(when (or (contains? cf/flags :log-emails)
(not (contains? cf/flags :smtp)))
(send-to-logger! cfg params))))
(defmethod ig/pre-init-spec ::handler [_]
(s/keys :req-un [::sendmail ::mtx/metrics]))
(defmethod ig/init-key ::handler
[_ {:keys [sendmail]}]
(fn [{:keys [props] :as task}]
(sendmail props)))
(defn- send-to-logger!
[_ email]
(let [body (:body email)
out (with-out-str
(println "email console dump:")
(println "******** start email" (:id email) "**********")
(pp/pprint (dissoc email :body))
(if (string? body)
(println body)
(println (->> body
(filter #(= "text/plain" (:type %)))
(map :content)
first)))
(println "******** end email" (:id email) "**********"))]
(l/info ::l/raw out)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; EMAIL FACTORIES
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(s/def ::subject ::us/string)
(s/def ::content ::us/string)
(s/def ::feedback
(s/keys :req-un [::subject ::content]))
(def feedback
"A profile feedback email."
(template-factory ::feedback))
(s/def ::name ::us/string)
(s/def ::register
(s/keys :req-un [::name]))
(def register
"A new profile registration welcome email."
(template-factory ::register))
(s/def ::token ::us/string)
(s/def ::password-recovery
(s/keys :req-un [::name ::token]))
(def password-recovery
"A password recovery notification email."
(template-factory ::password-recovery))
(s/def ::pending-email ::us/email)
(s/def ::change-email
(s/keys :req-un [::name ::pending-email ::token]))
(def change-email
"Password change confirmation email"
(template-factory ::change-email))
(s/def ::emails.invite-to-team/invited-by ::us/string)
(s/def ::emails.invite-to-team/team ::us/string)
(s/def ::emails.invite-to-team/token ::us/string)
(s/def ::invite-to-team
(s/keys :req-un [::emails.invite-to-team/invited-by
::emails.invite-to-team/token
::emails.invite-to-team/team]))
(def invite-to-team
"Teams member invitation email."
(template-factory ::invite-to-team))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; BOUNCE/COMPLAINS HELPERS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(def sql:profile-complaint-report
"select (select count(*)
from profile_complaint_report
where type = 'complaint'
and profile_id = ?
and created_at > now() - ?::interval) as complaints,
(select count(*)
from profile_complaint_report
where type = 'bounce'
and profile_id = ?
and created_at > now() - ?::interval) as bounces;")
(defn allow-send-emails?
[conn profile]
(when-not (:is-muted profile false)
(let [complaint-threshold (cf/get :profile-complaint-threshold)
complaint-max-age (cf/get :profile-complaint-max-age)
bounce-threshold (cf/get :profile-bounce-threshold)
bounce-max-age (cf/get :profile-bounce-max-age)
{:keys [complaints bounces] :as result}
(db/exec-one! conn [sql:profile-complaint-report
(:id profile)
(db/interval complaint-max-age)
(:id profile)
(db/interval bounce-max-age)])]
(and (< (or complaints 0) complaint-threshold)
(< (or bounces 0) bounce-threshold)))))
(defn has-complaint-reports?
([conn email] (has-complaint-reports? conn email nil))
([conn email {:keys [threshold] :or {threshold 1}}]
(let [reports (db/exec! conn (sql/select :global-complaint-report
{:email email :type "complaint"}
{:limit 10}))]
(>= (count reports) threshold))))
(defn has-bounce-reports?
([conn email] (has-bounce-reports? conn email nil))
([conn email {:keys [threshold] :or {threshold 1}}]
(let [reports (db/exec! conn (sql/select :global-complaint-report
{:email email :type "bounce"}
{:limit 10}))]
(>= (count reports) threshold))))