install_update_dovecot-2.4.sh: support english language in qota warn messages.

conf/install_update_dovecot.conf.sample

@@ -165,8 +165,16 @@ max_userip_connections=24
 #auth_mechanisms="plain login digest-md5 cram-md5"
 auth_mechanisms="plain login"
 
+
+# ---
 # - Settings for quota warning sript
-# - 
+# ---
+
+# msg_language
+#
+#  possible Vallues are 'en' or 'de' 
+#
+msg_language=de
 from_address="o.open <oo@oopen.de>"
 reply_to="oo@oopen.de"
 webmailer="https://webmail.oopen.de"

install_update_dovecot-2.4.sh

@@ -1026,6 +1026,13 @@ if [[ "$database" != "postgres" ]] && [[ "$database" != "mysql" ]] ; then
 fi
 [[ -n "$dbpassword" ]] || fatal "Parameter "dbpassword" not set."
 
+lang="${msg_language,,}"
+if [[ "$lang" =~ ^(en|us|en_us)$ ]]; then
+    msg_language="en"
+else
+    msg_language="de"
+fi
+   
 [[ -n "$from_address" ]] || fatal ""Parameter "from_address" not set.""
 [[ -n "$reply_to" ]] || fatal ""Parameter "reply_to" not set.""
 [[ -n "$webmailer" ]] || fatal ""Parameter "webmailer" not set.""
@@ -9912,7 +9919,47 @@ if [[ $dovecot_major_version -gt 2 ]] \
    echononl "   Create quota warning script.."
    ## - create the user-warning script
    ## -
-   cat <<EOF >/usr/local/bin/quota-warning.sh
+   if [[ "${msg_language}" == "en" ]] ; then
+      cat <<EOF >/usr/local/bin/quota-warning.sh
+#!/usr/bin/env bash
+
+# author:   zhang huangbin <michaelbibby (at) gmail.com>
+# purpose:  send mail to notify user when his mailbox quota exceeds a
+#           specified limit.
+# project:  iredmail (http://www.iredmail.org/)
+
+LANG=en_US.UTF-8
+
+percent=\$1
+user=\$2
+
+cat << EOF |  /usr/local/dovecot/libexec/dovecot/dovecot-lda -d \${user} -o quota_enforce=no
+Date: `date +"%a, %e %b %Y %H:%M:%S %z"`
+From: $from_address
+Reply-to: $reply_to
+To:\${user}
+Subject: Quota warning - mailbox is ${percent}% full
+content-type: text/plain;
+   charset=utf-8
+
+Hello!
+
+Your email inbox
+   \${user}
+is over \${percent}% full. To continue receiving emails, please delete emails from your inbox on the server.
+
+You can also use the webmail service:
+   $webmailer
+
+After deleting emails, please remember to empty the trash folder as well.
+
+Best regards
+
+$salutation
+${_EOF:-EOF}
+EOF
+   else
+      cat <<EOF >/usr/local/bin/quota-warning.sh
 #!/usr/bin/env bash
 
 # author:   zhang huangbin <michaelbibby (at) gmail.com>
@@ -9951,6 +9998,7 @@ Viele Grüße
 $salutation
 ${_EOF:-EOF}
 EOF
+   fi
    if [ "$?" = 0 ]; then
       echo -e "$rc_done"
    else
@@ -9963,7 +10011,33 @@ EOF
    echononl "   Create quota warn-under script.."
    ## - create the user-warning script
    ## -
-   cat <<EOF >/usr/local/bin/quota-warn-under.sh
+   if [[ "${msg_language}" == "en" ]] ; then
+      cat <<EOF >/usr/local/bin/quota-warn-under.sh
+cat << EOF |  /usr/local/dovecot/libexec/dovecot/dovecot-lda -d \${user} -o quota_enforce=no
+Date: \`date +"%a, %e %b %Y %H:%M:%S %z"\`
+From: $from_address
+Reply-to: $reply_to
+To:\${user}
+Subject: Mailbox quota: less than ${percent}% used
+content-type: text/plain;
+   charset=utf-8
+
+Your mailbox
+   \${user}
+can now receive e-mail again.
+
+Please note that, depending on how much space you have freed, your available storage may fill up again quickly.
+
+You can check the current usage in your mail client or via the webmailer here:
+   $webmailer
+
+Best regards
+
+$salutation
+${_EOF:-EOF}
+EOF
+   else
+      cat <<EOF >/usr/local/bin/quota-warn-under.sh
 #!/usr/bin/env bash
 
 percent=\$1
@@ -9995,6 +10069,7 @@ Viele Grüße
 $salutation
 ${_EOF:-EOF}
 EOF
+   fi
    if [ "$?" = 0 ]; then
       echo -e "$rc_done"
    else