gluon-web-cellular: add package

This adds a new package which allows configuration of Gluons cellular
WWAN capabilities using the configuration mode. This way, a user can
enter APN information as well as the SIM PIN and enable / disable the
functionality.

Signed-off-by: David Bauer <mail@david-bauer.net>

package/gluon-web-cellular/Makefile

+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-web-cellular
+
+include ../gluon.mk
+
+define Package/gluon-web-cellular
+  DEPENDS:=+gluon-web-admin
+  TITLE:=UI for activating cellular WAN
+endef
+
+$(eval $(call BuildPackageGluon,gluon-web-cellular))

package/gluon-web-cellular/i18n/gluon-web-cellular.pot

+msgid ""
+msgstr "Content-Type: text/plain; charset=UTF-8"
+
+msgid "APN"
+msgstr ""
+
+msgid "Cellular"
+msgstr ""
+
+msgid "Enabled"
+msgstr ""
+
+msgid "IPv4"
+msgstr ""
+
+msgid "IPv4/IPv6"
+msgstr ""
+
+msgid "IPv6"
+msgstr ""
+
+msgid "Password"
+msgstr ""
+
+msgid "SIM PIN"
+msgstr ""
+
+msgid "Type"
+msgstr ""
+
+msgid "Username"
+msgstr ""
+
+msgid ""
+"You can enable uplink via cellular service. If you decide so, the VPN "
+"connection is established using the integrated WWAN modem."
+msgstr ""

package/gluon-web-cellular/luasrc/lib/gluon/config-mode/controller/admin/cellular.lua

+local platform = require 'gluon.platform'
+
+package 'gluon-web-cellular'
+
+if platform.is_cellular_device() then
+	entry({"admin", "cellular"}, model("admin/cellular"), _("Cellular"), 30)
+end

package/gluon-web-cellular/luasrc/lib/gluon/config-mode/model/admin/cellular.lua

+local uci = require("simple-uci").cursor()
+
+local f = Form(translate("Cellular"))
+
+local s = f:section(Section, nil, translate(
+	'You can enable uplink via cellular service. If you decide so, the VPN connection is established '
+	.. 'using the integrated WWAN modem.'
+))
+
+local enabled = s:option(Flag, "enabled", translate("Enabled"))
+enabled.default = uci:get('gluon', 'cellular') and uci:get_bool('gluon', 'cellular', 'enabled')
+
+local pin = s:option(Value, "pin", translate("SIM PIN"))
+pin:depends(enabled, true)
+pin.default = uci:get('gluon', 'cellular', 'pin')
+
+local apn = s:option(Value, "apn", translate("APN"))
+apn:depends(enabled, true)
+apn.default = uci:get('gluon', 'cellular', 'apn')
+
+local pdptype = s:option(ListValue, "type", translate("Type"))
+pdptype:depends(enabled, true)
+pdptype:value("IP", translate("IPv4"))
+pdptype:value("IPV6", translate("IPv6"))
+pdptype:value("IPV4V6", translate("IPv4/IPv6"))
+pdptype.default = uci:get('gluon', 'cellular', 'pdptype') or "IP"
+
+local username = s:option(Value, "username", translate("Username"))
+username:depends(enabled, true)
+username.default = uci:get('gluon', 'cellular', 'username')
+
+local password = s:option(Value, "password", translate("Password"))
+password:depends(enabled, true)
+password.default = uci:get('gluon', 'cellular', 'password')
+
+function f:write()
+	local cellular_enabled = false
+	if enabled.data then
+		cellular_enabled = true
+	end
+
+	uci:section('gluon', 'cellular', 'cellular', {
+		enabled = cellular_enabled,
+		apn = apn.data,
+		pdptype = pdptype.data,
+		pin = pin.data,
+		username = username.data,
+		password = password.data,
+	})
+
+	uci:commit('gluon')
+end
+
+return f