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package com.pi4j.io.gpio.trigger;
/*
* #%L
* **********************************************************************
ORGANIZATION : Pi4J
PROJECT : Pi4J :: Java Library (Core)
FILENAME : IFTTTMakerChannelTrigger.java
This file is part of the Pi4J project. More information about
this project can be found here: http://www.pi4j.com/
**********************************************************************
* %%
* Copyright (C) 2012 - 2018 Pi4J
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import com.pi4j.io.gpio.GpioPin;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.event.IFTTTMakerChannelTriggerEvent;
import com.pi4j.io.gpio.event.IFTTTMakerChannelTriggerListener;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.net.*;
import java.nio.charset.StandardCharsets;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
@SuppressWarnings("unused")
public class IFTTTMakerChannelTrigger extends GpioTriggerBase {
private final String apikey;
private final String eventName;
private IFTTTMakerChannelTriggerListener listener = null;
protected static final String IFTTT_MAKER_CHANNEL_URL = "https://maker.ifttt.com/trigger/%s/with/key/%s";
public IFTTTMakerChannelTrigger(String apikey, String eventName) {
super();
this.apikey = apikey;
this.eventName = eventName;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, PinState state) {
super(state);
this.apikey = apikey;
this.eventName = eventName;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, PinState[] states) {
super(states);
this.apikey = apikey;
this.eventName = eventName;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, List states) {
super(states);
this.apikey = apikey;
this.eventName = eventName;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, IFTTTMakerChannelTriggerListener listener) {
super();
this.apikey = apikey;
this.eventName = eventName;
this.listener = listener;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, PinState state, IFTTTMakerChannelTriggerListener listener) {
super(state);
this.apikey = apikey;
this.eventName = eventName;
this.listener = listener;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, PinState[] states, IFTTTMakerChannelTriggerListener listener) {
super(states);
this.apikey = apikey;
this.eventName = eventName;
this.listener = listener;
}
public IFTTTMakerChannelTrigger(String apikey, String eventName, List states, IFTTTMakerChannelTriggerListener listener) {
super(states);
this.apikey = apikey;
this.eventName = eventName;
this.listener = listener;
}
/**
* Use this method to register/assign a custom trigger listener.
*
* This callback listener is fired when the IFTTTMakerChannelTrigger
* receives a GPIO pin change that invokes the trigger. This listener
* provides the consumer an opportunity to be notified of the trigger event,
* to optionally abort the triggered event before sending data to the IFTTT
* Maker Channel API, or an opportunity to override any data payload values
* before transmitting to the IFTTT Maker Channel API.
*
* @param listener
*/
public void setTriggerListener(IFTTTMakerChannelTriggerListener listener){
this.listener = listener;
}
@Override
public void invoke(GpioPin pin, PinState state) {
try {
// create an ISO-8601 complaint date format for timestamp
DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
// create the default JSON payload that will get supplied as the default
// data for 'value3' in the IFTTT Maker Channel trigger API
String json = "{\"pin\":{\"name\":\"" + pin.getName() +
"\",\"address\":\"" + pin.getPin().getAddress() +
"\",\"provider\":\"" + pin.getPin().getProvider() +
"\",\"mode\":\"" + pin.getMode().getName() +
"\",\"direction\":\"" + pin.getMode().getDirection() +
"\",\"pull\":\"" + pin.getPullResistance().getName() +
"\"},\"state\":{" +
"\"name\":\"" + state.getName() +
"\",\"value\":\"" + state.getValue() +
"\",\"is-high\":\"" + state.isHigh() +
"\",\"is-low\":\"" + state.isLow() +
"\"},\"timestamp\":\"" + df.format(new Date()) + "\"}";
// create an IFTTT Maker Channel event
IFTTTMakerChannelTriggerEvent event = new IFTTTMakerChannelTriggerEvent(
this, // IFTTTMakerChannelTrigger instance
pin, // GPIO PIN instance
state, // GPIO PIN STATE
eventName, // IFTTT EVENT NAME
pin.getName(), // VALUE 1
Integer.toString(state.getValue()), // VALUE 2
json); // VALUE 3
// if the consumer configured a custom listener for callback events,
// then we need to invoke the listner instance 'onTriggered' callback
// method with the IFTTTMakerChannelTriggerEvent instance.
if(this.listener != null){
if(this.listener.onTriggered(event) == false) {
// abort
return;
}
}
// we must URL encode the IFTTT payload data values (value1, value2, value3)
String value1 = URLEncoder.encode(event.getValue1(), StandardCharsets.UTF_8.name());
String value2 = URLEncoder.encode(event.getValue2(), StandardCharsets.UTF_8.name());
String value3 = URLEncoder.encode(event.getValue3(), StandardCharsets.UTF_8.name());
// create the URL parameters and post data
String urlParameters = "value1=" + value1 + "&value2=" + value2 + "&value3=" + value3;
byte[] postData = urlParameters.getBytes(StandardCharsets.UTF_8);
// create the IFTTT Maker Channel trigger URL & connection
URL url = new URL(String.format(IFTTT_MAKER_CHANNEL_URL, eventName, apikey));
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("charset", "utf-8");
connection.setRequestProperty("Content-Length", Integer.toString(postData.length));
connection.setUseCaches(false);
try( DataOutputStream stream = new DataOutputStream(connection.getOutputStream())) {
stream.write( postData );
}
// get HTTP response
int responseCode = connection.getResponseCode();
// if the HTTP post resulted in an error, then raise an exception
if(responseCode != 200) {
System.err.println("IFTTT MakerChannel ERROR Response Code: " + responseCode);
BufferedReader in = new BufferedReader( new InputStreamReader(connection.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
throw new RuntimeException(response.toString());
}
}
catch (IOException e) {
throw new RuntimeException(e);
}
}
}
