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processMain.js
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processMain.js
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const net = require("net");
const fs = require("fs");
const HOST = "127.0.0.1";
const PORT = 8080;
const STATE = {
DETECT_INIT: 0,
DETECT_START: 1,
SENSOR_TRIGGER: 2,
GPS_TRIGGER: 3,
CAMERA_TRIGGER: 4,
ACCIDENT_REPORT: 5
};
let currentState = STATE.DETECT_INIT;
let sensorInitStatus = [0, 0, 0];
let iothatMessageToSend = "";
let iothatIsMessageAvailable = false;
let accidentData = {
sensor: "",
location: "",
camera: ""
};
let previousTime = Date.now();
let stateTime = 0;
let stateTimeout = 10000;
const config = JSON.parse(fs.readFileSync("config.json"));
const phoneNumber = config.generalConfig.communication.phoneNumber;
net.createServer(socket => {
socket.on("connect", () => {
console.log(`Connected to ${socket.remoteAddress}`);
});
socket.on("data", data => {
//TODO: Write data processing stuff
let receivedData = data.toString();
console.log(receivedData);
switch (currentState) {
case STATE.DETECT_INIT:
console.log("Current State: Detect Init");
if (receivedData.indexOf("SENSOR") > -1) {
sensorInitStatus[0] = 1;
} else if (receivedData.indexOf("CAMERA") > -1) {
sensorInitStatus[1] = 1;
} else if (receivedData.indexOf("GPS") > -1) {
sensorInitStatus[2] = 1;
}
let nextState = true;
sensorInitStatus.forEach(value => {
if (value === 0) {
nextState = false;
}
});
if (nextState === true) {
currentState = STATE.DETECT_START;
}
break;
case STATE.DETECT_START:
console.log("Current State: Detection start");
if (
receivedData.indexOf("SENSOR") > -1 &&
receivedData.indexOf("TRUE") > -1
) {
currentState = STATE.SENSOR_TRIGGER;
accidentData.sensor = receivedData;
}
break;
case STATE.SENSOR_TRIGGER:
console.log("Current State: Sensor triggered");
if (
receivedData.indexOf("GPS") > -1 &&
receivedData.indexOf("TRUE") > -1
) {
currentState = STATE.GPS_TRIGGER;
stateTime = 0;
accidentData.location = receivedData;
} else if (Date.now() - previousTime > stateTimeout) {
currentState = STATE.DETECT_START;
stateTime = 0;
} else {
stateTime += Date.now() - previousTime;
}
break;
case STATE.GPS_TRIGGER:
console.log("Current State: GPS triggered");
if (
receivedData.indexOf("CAMERA") > -1 &&
receivedData.indexOf("TRUE") > -1
) {
currentState = STATE.CAMERA_TRIGGER;
accidentData.camera = receivedData;
} else if (Date.now() - previousTime > stateTimeout) {
currentState = STATE.DETECT_START;
stateTime = 0;
} else {
stateTime += Date.now() - previousTime;
}
break;
case STATE.CAMERA_TRIGGER:
console.log("Current State: Camera Triggered");
iothatMessageToSend = `AD -> ${phoneNumber}|${accidentData.sensor}|${accidentData.location}|${accidentData.camera}`;
iothatIsMessageAvailable = true;
currentState = STATE.ACCIDENT_REPORT;
break;
case STATE.ACCIDENT_REPORT:
currentState = STATE.DETECT_START;
stateTime = 0;
break;
default:
break;
}
if (receivedData.indexOf("GPS") > -1) {
if (iothatIsMessageAvailable === true) {
socket.write(iothatMessageToSend);
iothatIsMessageAvailable = false;
iothatMessageToSend = "";
} else {
socket.write("EMPTY");
}
}
previousTime = Date.now();
});
socket.on("close", () => {
console.log(`Connection closed: ${socket.remoteAddress}`);
});
socket.on("error", error => {
console.log(`Error at ${socket.remoteAddress}`);
});
}).listen(PORT, HOST);
console.log(`Raspi Process running at ${HOST}:${PORT}`);