[flicbutton] Initial contribution FlicButton Binding

CODEOWNERS

@@ -68,6 +68,7 @@
 /bundles/org.openhab.binding.exec/ @kgoderis
 /bundles/org.openhab.binding.feed/ @svilenvul
 /bundles/org.openhab.binding.feican/ @Hilbrand
+/bundles/org.openhab.binding.flicbutton/ @pfink
 /bundles/org.openhab.binding.fmiweather/ @ssalonen
 /bundles/org.openhab.binding.folding/ @fa2k
 /bundles/org.openhab.binding.foobot/ @airboxlab @Hilbrand

bundles/org.openhab.binding.flicbutton/NOTICE

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+This content is produced and maintained by Patrick Fink.
+
+* Project home: https://www.openhab.org
+
+== Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0/.
+
+== Source Code
+
+https://github.com/openhab/openhab-addons
+
+== Third-party Content
+
+fliclib-javaclient (files under src/3rdparty)
+
+* License: CC0 1.0
+* Project: https://github.com/50ButtonsEach/fliclib-linux-hci
+* Source:  https://github.com/50ButtonsEach/fliclib-linux-hci/tree/master/clientlib/java/lib/src/main/java/io/flic/fliclib/javaclient

bundles/org.openhab.binding.flicbutton/README.md

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+# openHAB Flic Button Binding 
+
+openHAB binding for using [Flic Buttons](https://flic.io/)
+with a [fliclib-linux-hci](https://github.com/50ButtonsEach/fliclib-linux-hci) bridge.
+
+Currently, although Flic Buttons are BLE devices, this binding only supports fliclib-linux-hci (flicd)
+as a bridge. The openHAB Bluetooth Bindings are not supported. Flicd requires a seperate Bluetooth adapter to work, so
+if you use this binding together with e.g. the [Bluez Binding](https://www.openhab.org/addons/bindings/bluetooth.bluez/),
+two physical Bluetooth adapters are required (one for Bluez and one for flicd). Be aware that flicd requires an initial
+internet connection for the verification of the buttons. After buttons are initially added to flicd, internet connection
+is not required anymore.
+
+## Supported Things
+
+| Thing Type ID   | Description               |
+| --------------- | ------------------------- |
+| flicd-bridge | The bridge representing a running instance of [fliclib-linux-hci (flicd)](https://github.com/50ButtonsEach/fliclib-linux-hci) on the server. |
+| button | The Flic button (supports Flic 1 buttons as well as Flic 2 buttons) |
+
+## Discovery
+
+* There is no automatic discovery for flicd-bridge available.
+
+* After flicd-bridge is (manually) configured, buttons will be automatically discovered via background discovery as soon
+  as they're addded with [simpleclient](https://github.com/50ButtonsEach/fliclib-linux-hci) . If they're already
+  attached to the flicd-bridge before configuring this binding, they can be discovered by triggering an active scan.
+
+## Thing Configuration
+
+### flicd-bridge
+
+Example for textual configuration:
+
+```
+Bridge flicbutton:flicd-bridge:mybridge
+```
+
+The default host is localhost:5551 (this should be sufficient if flicd is running with default settings on the same
+server as openHAB). If your flicd service is running somewhere else, specify it like this:
+
+```
+Bridge flicbutton:flicd-bridge:mybridge [ hostname="<YOUR_HOSTNAME>",  port="<YOUR_PORT>"]
+```
+
+If flicd is running on a remote host, please do not forget to start it with the parameter `-s <openHAB IP>`, otherwise it won't be accessible for openHAB (more details on [fliclib-linux-hci](https://github.com/50ButtonsEach/fliclib-linux-hci)).
+
+### button
+
+For the button, the only config parameter is the MAC address. Normally, no textual configuration is necessary as buttons are autodiscovered as soon as the bridge is configured. If you want to use textual configuration anyway, you can do it like this:
+
+```
+Bridge flicbutton:flicd-bridge:mybridge [ hostname="<YOUR_HOSTNAME>",  port="<YOUR_PORT>"] {
+    Thing button myflic1 "<YOUR_LABEL>" [address = <MAC_ADDRESS>]
+    Thing button myflic2 "<YOUR_LABEL>" [address =<MAC_ADDRESS> ]
+    ...
+}
+```
+
+You can lookup the MAC addresses of your buttons within the inbox of the UI. You're free to choose any label you like for your button.
+
+## Channels
+
+| Channel ID                | Channel Type             | Item Type                | Description                    |
+| ------------------------- | ------------------------ | --------------------------| ------------------------------ |
+| rawbutton                | [System Trigger Channel](https://www.openhab.org/docs/developer/bindings/thing-xml.html#system-trigger-channel-types) `system.rawbutton`  | Depends on the  [Trigger Profile](https://www.openhab.org/docs/configuration/items.html#profiles) used | Raw Button channel that triggers `PRESSED` and `RELEASED` events, allows to use openHAB profiles or own implementations via rules to detect e.g. double clicks, long presses etc.  |
+| button                   | [System Trigger Channel](https://www.openhab.org/docs/developer/bindings/thing-xml.html#system-trigger-channel-types) `system.button`    | Depends on the [Trigger Profile](https://www.openhab.org/docs/configuration/items.html#profiles) used | Button channel that is using Flic's implementation for detecting long, short or double clicks. Triggers `SHORT_PRESSED`,`DOUBLE_PRESSED` and `LONG_PRESSED` events.   |
+| battery-level            | [System State Channel](https://www.openhab.org/docs/developer/bindings/thing-xml.html#system-state-channel-types) `system.battery-level`     | Number | Represents the battery level as a percentage (0-100%).
+
+
+## Example
+
+### Initial setup
+
+1. Setup and run flicd as described in [fliclib-linux-hci](https://github.com/50ButtonsEach/fliclib-linux-hci). Please consider that you need a seperate Bluetooth adapter. Shared usage with other Bluetooth services (e.g. Bluez) is not possible.
+1. Connect your buttons to flicd using the simpleclient as described in [fliclib-linux-hci](https://github.com/50ButtonsEach/fliclib-linux-hci). Flicd has to run in background the whole time, simpleclient can be killed after you successfully tested the button connection.
+1. Add a flicd-bridge via UI or Textual Configuration. Please consider that flicd does only accept connections from localhost by default, to enable remote connections from openHAB you have to use the `--server-addr` parameter as described in [fliclib-linux-hci](https://github.com/50ButtonsEach/fliclib-linux-hci).
+1. When the bridge is online, buttons newly added via simpleclient will automatically get discovered via background Discovery. To discover buttons that were set up before the Binding setup, please run an active scan.
+
+### Configuration Example using Profiles
+
+[Profiles](https://www.openhab.org/docs/configuration/items.html#profiles) are the recommended way to use this binding.
+
+demo.things:
+
+```
+Bridge flicbutton:flicd-bridge:local-flicd {
+	Thing button flic_livingroom "Yellow Button Living Room" [address = "60:13:B3:02:18:BD"]
+	Thing button flic_kitchen "Black Button Kitchen" [address = "B5:7E:59:78:86:9F"]
+}
+```
+
+demo.items:
+
+```
+Dimmer Light_LivingRoom  { channel="milight:rgbLed:milight2:4:ledbrightness", channel="flicbutton:button:local-flicd:flic_livingroom:rawbutton" [profile="rawbutton-toggle-switch"], channel="flicbutton:button:local-flicd:flic_kitchen:rawbutton" [profile="rawbutton-toggle-switch"] }  // We have a combined kitchen / livingroom, so we control the living room lights with switches from the living room and from the kitchen
+Switch Light_Kitchen    { channel="hue:group:1:kitchen-bulbs:switch", channel="flicbutton:button:local-flicd:flic_kitchen:rawbutton" [profile="rawbutton-toggle-switch"] }
+```
+
+### Configuration Example using Rules
+
+It's also possible to setup [Rules](https://www.openhab.org/docs/configuration/rules-dsl.html).
+The following rules help to initially test your setup as they'll trigger log messages on incoming events.
+    ```
+    rule "Button rule using the button channel"
+
+    when
+        Channel "flicbutton:button:local-flicd:flic_livingroom:button" triggered SHORT_PRESSED
+    then
+        logInfo("Flic", "Flic 'short pressed' triggered")
+    end
+
+    rule "Button rule directly using the rawbutton channel"
+
+    when
+        Channel "flicbutton:button:local-flicd:flic_livingroom:rawbutton" triggered
+    then
+        logInfo("Flic", "Flic pressed: " + receivedEvent.event)
+    end
+    ```

bundles/org.openhab.binding.flicbutton/pom.xml

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.openhab.addons.bundles</groupId>
+    <artifactId>org.openhab.addons.reactor.bundles</artifactId>
+    <version>3.0.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.openhab.binding.flicbutton</artifactId>
+
+  <name>openHAB Add-ons :: Bundles :: FlicButton Binding</name>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>build-helper-maven-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>add-source</goal>
+            </goals>
+            <phase>generate-sources</phase>
+            <configuration>
+              <sources>
+                <source>src/3rdparty</source>
+              </sources>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

bundles/org.openhab.binding.flicbutton/src/3rdparty/LICENSE

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bundles/org.openhab.binding.flicbutton/src/3rdparty/java/io/flic/fliclib/javaclient/BatteryStatusListener.java

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+package io.flic.fliclib.javaclient;
+
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Battery status listener.
+ *
+ * Add this listener to a {@link FlicClient} by executing {@link FlicClient#addBatteryStatusListener(BatteryStatusListener)}.
+ */
+public class BatteryStatusListener {
+    private static AtomicInteger nextId = new AtomicInteger();
+    int listenerId = nextId.getAndIncrement();
+
+    private Bdaddr bdaddr;
+    Callbacks callbacks;
+
+    public BatteryStatusListener(Bdaddr bdaddr, Callbacks callbacks) {
+        if (bdaddr == null) {
+            throw new IllegalArgumentException("bdaddr is null");
+        }
+        if (callbacks == null) {
+            throw new IllegalArgumentException("callbacks is null");
+        }
+        this.bdaddr = bdaddr;
+        this.callbacks = callbacks;
+    }
+
+    public Bdaddr getBdaddr() {
+        return bdaddr;
+    }
+
+    public abstract static class Callbacks {
+        /**
+         * This will be called when the battery status has been updated.
+         * It will also be called immediately after the battery status listener has been created.
+         * If the button stays connected, this method will be called approximately every three hours.
+         *
+         * @param bdaddr            Bluetooth device address
+         * @param batteryPercentage A number between 0 and 100 for the battery level. Will be -1 if unknown.
+         * @param timestamp         Standard UNIX timestamp, in seconds, for the event.
+         */
+        public abstract void onBatteryStatus(Bdaddr bdaddr, int batteryPercentage, long timestamp) throws IOException;
+    }
+}