Add option to send mail when connection status change

luci-app-mail/Makefile

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+#
+# Copyright (C) 2018 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>
+#
+#
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=LuCI Mail Configuration
+LUCI_DEPENDS:=+msmtp-mta +ca-certificates
+
+PKG_LICENSE:=GPLv3
+
+include ../luci/luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature

luci-app-mail/luasrc/controller/mail.lua

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+local ucic = luci.model.uci.cursor()
+local dt = require "luci.cbi.datatypes"
+module("luci.controller.mail", package.seeall)
+
+function index()
+	entry({"admin", "services", "mail"}, alias("admin", "services", "mail", "index"), _("Mail"))
+	entry({"admin", "services", "mail", "index"}, cbi("mail"))
+end

luci-app-mail/luasrc/model/cbi/mail.lua

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+-- Copyright 2018 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>
+-- Licensed to the public under the Apache License 2.0.
+
+m = Map("mail", translate("Send mail"), translate("Send mail settings"))
+
+s = m:section(TypedSection, "smtp", translate("SMTP"))
+s.anonymous = true
+s.addremove = false
+
+server = s:option(Value, "server", translate("Server"))
+server.datatype = "host"
+server.placeholder = "smtp.gmail.com"
+server.optional = false
+
+port = s:option(Value, "port", translate("Port"))
+port.datatype = "port"
+port.optional = false
+port.rmempty  = true
+port.default = "25"
+
+tls = s:option(Flag, "tls", translate("TLS"))
+tls.rmempty  = false
+
+tls_starttls = s:option(Flag, "tls_starttls", translate("STARTTLS"))
+tls_starttls.rmempty  = false
+
+user = s:option(Value, "user", translate("User"))
+user.rmempty = true
+
+password = s:option(Value, "password", translate("Password"))
+password.password = true
+password.rmempty = true
+
+from = s:option(Value, "from", translate("From"))
+from.optional = false
+from.rmempty = true
+from.placeholder = "myself@gmail.com"
+
+to = s:option(Value, "to", translate("To"))
+to.optional = false
+to.rmempty = true
+to.placeholder = "myself@gmail.com"
+
+return m

luci-app-mail/root/etc/config/mail

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+config smtp 'default'

luci-app-mail/root/etc/init.d/msmtp

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+#!/bin/sh /etc/rc.common
+# Copyright (C) 2018 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>
+
+START=90
+STOP=10
+
+USE_PROCD=1
+
+validate_section() {
+	uci_validate_section mail smtp "${1}" \
+		'server:host'          \
+		'tls:bool:0'           \
+		'tls_starttls:bool:0'  \
+		'from:string'          \
+		'user:string'          \
+		'password:string'      \
+		'port:port:25'
+}
+
+config_account() {
+	local server tls tls_starttls from user password
+
+	validate_section "${1}" || {
+		_err "validation failed"
+		return 1
+	}
+
+	cat > /tmp/msmtp.tmp <<-EOF
+	account default
+	host $server
+	port $port
+	EOF
+	[ -n "$user" ] && [ -n "$password" ] && {
+		cat >> /tmp/msmtp.tmp <<-EOF
+		auth on
+		user $user
+		password $password
+		EOF
+	}
+	[ -n "$from" ] && echo "from $from" >> /tmp/msmtp.tmp
+	[ "$tls" = "1" ] && {
+		cat >> /tmp/msmtp.tmp <<-EOF
+		tls_trust_file /etc/ssl/certs/ca-certificates.crt
+		tls on
+		EOF
+	} || {
+		echo 'tls off' >> /tmp/msmtp.tmp
+	}
+	[ "$tls_starttls" = "1" ] && {
+		echo 'tls_starttls on' >> /tmp/msmtp.tmp
+	} || {
+		echo 'tls_starttls off' >> /tmp/msmtp.tmp
+	}
+}
+
+start_service() {
+	config_load mail
+	config_foreach config_account smtp
+	[ -f "/tmp/msmtp.tmp" ] && mv /tmp/msmtp.tmp /etc/msmtprc
+}

luci-app-mail/root/etc/uci-defaults/4101-mail

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+#!/bin/sh
+uci -q batch <<-EOF >/dev/null
+	delete ucitrack.@mail[-1]
+	add ucitrack mail
+	set ucitrack.@mail[-1].init=mail
+	commit ucitrack
+EOF
+exit 0