From 764c39f4facfe42d926cd952dcf0f7e2768097a8 Mon Sep 17 00:00:00 2001
From: mm-chen <github@malte-modler.de>
Date: Mon, 9 Apr 2018 21:29:04 +0200
Subject: Display on/off

Turns the display off and on via MQTT
---
 README.md                                 |  4 ++++
 example.cfg                               |  5 +++++
 src/display-on-off/display-on-off.sh      | 26 ++++++++++++++++++++++++++
 systemd/shopsystem-display-on-off.service | 12 ++++++++++++
 4 files changed, 47 insertions(+)
 create mode 100755 src/display-on-off/display-on-off.sh
 create mode 100644 systemd/shopsystem-display-on-off.service

diff --git a/README.md b/README.md
index 830ae5b..9a0dbf6 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,10 @@ but you need to modify a few things.
   `sqlite3 shop.db "INSERT INTO categories (name) VALUES ('Getränke')";`
   `sqlite3 shop.db "INSERT INTO supplier (name,city,postal_code,street,phone,website) VALUES ('Demo Lieferant','Musterstadt','12345','Musterstraße 5','+49 1234 56789','https://www.ktt.de');"`
 
+=== Display on / off via MQTT ===
+
+You can control display power via MQTT by configuring the MQTT settings (i.e. BROKER, TOPIC) in the config file.
+
 == Customize Your Shop ==
 
 Edit the Logo in the logo.txt File.
diff --git a/example.cfg b/example.cfg
index 27172b1..65056d8 100644
--- a/example.cfg
+++ b/example.cfg
@@ -32,3 +32,8 @@ footer2 = <b>Raiffeisenbank Oldenburg</b>\nIBAN: DE34 2806 0228 0037 0185 00\nBI
 footer3 = <b>Mail:</b> vorstand@kreativitaet-trifft-technik.de\n<b>Web:</b> www.kreativitaet-trifft-technik.de\n\n\n\n<b>BGB-Vorstand:</b>\nPatrick Günther, Jan Janssen, Andre Schäfer, Lars Hüsemann
 [JVEREIN]
 membership_number = intern
+[MQTT]
+broker = mqtt.server.exaple.com
+topic = /exaple/topic
+displayOn = open
+displayOff = close
diff --git a/src/display-on-off/display-on-off.sh b/src/display-on-off/display-on-off.sh
new file mode 100755
index 0000000..23ab10a
--- /dev/null
+++ b/src/display-on-off/display-on-off.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+function getMqttConfig
+{
+	echo `busctl --system call io.mainframe.shopsystem.Config /io/mainframe/shopsystem/config io.mainframe.shopsystem.Config GetString ss MQTT $1 | sed -s "s;s ;;"`
+}
+
+BROKER=$(getMqttConfig broker)
+TOPIC=$(getMqttConfig topic)
+ON=$(getMqttConfig displayOn)
+OFF=$(getMqttConfig displayOff)
+
+mosquitto_sub -h $BROKER -t $TOPIC | while read RAW_DATA
+do
+	case $RAW_DATA	in
+	$ON)
+		vbetool dpms on
+		;;
+	$OFF)
+		vbetool dpms off
+		;;
+	*)
+		#vbetool dpms on
+		;;
+	esac
+done
diff --git a/systemd/shopsystem-display-on-off.service b/systemd/shopsystem-display-on-off.service
new file mode 100644
index 0000000..dfa6f0c
--- /dev/null
+++ b/systemd/shopsystem-display-on-off.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=Display on-off via MQTT
+After=systemd-user-sessions.service
+
+[Service]
+Type=simple
+ExecStart=/home/shop/serial-barcode-scanner/src/display-on-off/display-on-off.sh
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target
-- 
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