luci-mod-system: add led plugin infrastructure

This commit creates the possibility that not only kernel-led-triggers can
be selected but also application-led-triggers from user space.
This is done via a plugin mechanism. The application-led-triggers are scripts
that set kernel-led-triggers on system events or services. Until now this
has not been possible. The package rssileds is a kind of
application-led-trigger.

The following new packages are added:

* luci-app-ledtrig-rssi (application-led-trigger)
* luci-app-ledtrig-switch (kernel-led-trigger) not needed on every most devices
* luci-app-ledtrig-usport (kernel-led-trigger) optional trigger

Since we have now a plugin mechanism I have added the following triggers
as a dependency. So this triggers are now installed per default on LuCI
installation.

* kmod-ledtrig-default-on
* kmod-ledtrig-heartbeat
* kmod-ledtrig-netdev
* kmod-ledtrig-timer

The kernel trigger kmod-ledtrig-usbdev was removed with the commit
https://github.com/openwrt/openwrt/commit/d0b50c2770a0e2d54b37153f2801e2e7dc865fa6
So I have not ported the relevant code anymore.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

2 files changed, 62 insertions, 0 deletions

diff --git a/applications/luci-app-ledtrig-usbport/Makefile b/applications/luci-app-ledtrig-usbport/Makefile
new file mode 100644
index 000000000..1a176676f
--- /dev/null
+++ b/applications/luci-app-ledtrig-usbport/Makefile
@@ -0,0 +1,16 @@
+#
+# Copyright (C) 2020 TDT AG <development@tdt.de>
+#
+# This is free software, licensed under the Apache License Version 2.0.
+# See https://www.apache.org/licenses/LICENSE-2.0 for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:= LuCI Support for ledtrigger usbport
+LUCI_DEPENDS:=+kmod-usb-ledtrig-usbport
+LUCI_PKGARCH:=all
+
+include ../../luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature
diff --git a/applications/luci-app-ledtrig-usbport/htdocs/luci-static/resources/view/system/led-trigger/usbport.js b/applications/luci-app-ledtrig-usbport/htdocs/luci-static/resources/view/system/led-trigger/usbport.js
new file mode 100644
index 000000000..970016c42
--- /dev/null
+++ b/applications/luci-app-ledtrig-usbport/htdocs/luci-static/resources/view/system/led-trigger/usbport.js
@@ -0,0 +1,46 @@
+'use strict';
+'require rpc';
+'require uci';
+'require form';
+
+var callUSB = rpc.declare({
+	object: 'luci',
+	method: 'getUSBDevices',
+	expect: { 'ports': [] }
+});
+
+return L.Class.extend({
+	trigger: _('usbport (kernel)'),
+	kernel: true,
+	addFormOptions(s){
+		var o;
+
+		o = s.option(form.Value, 'port', _('USB Ports'));
+		o.depends('trigger', 'usbport');
+		o.rmempty = true;
+		o.modalonly = true;
+		o.load = function(s) {
+			return Promise.all([
+				callUSB()
+			]).then(L.bind(function(usbport){
+				for (var i = 0; i < usbport[0].length; i++)
+					o.value(usbport[0][i].port, _('Port %s').format(usbport[0][i].port));
+			},this));
+		};
+		o.cfgvalue = function(section_id) {
+			var ports = [],
+				value = uci.get('system', section_id, 'port');
+
+			if (!Array.isArray(value))
+				value = String(value || '').split(/\s+/);
+
+			for (var i = 0; i < value.length; i++)
+				if (value[i].match(/^(\d+)-(\d+)$/))
+					ports.push('usb%d-port%d'.format(Regexp.$1, Regexp.$2));
+				else
+					ports.push(value[i]);
+
+			return ports;
+		};
+	}
+});