138 lines
4.1 KiB
JavaScript
Executable File
138 lines
4.1 KiB
JavaScript
Executable File
'use strict'
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// Imports
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const debug = require('debug')('tracman-sockets')
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const sanitize = require('mongo-sanitize')
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const User = require('./models.js').user
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// Check for tracking clients
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function checkForUsers (io, user) {
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debug(`Checking for clients receiving updates for ${user}`)
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// Checks if any sockets are getting updates for this user
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if (Object.values(io.sockets.connected).some((socket) => {
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return socket.gets === user
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})) {
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debug(`Activating updates for ${user}.`)
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io.to(user).emit('activate', 'true')
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} else {
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debug(`Deactivating updates for ${user}.`)
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io.to(user).emit('activate', 'false')
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}
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}
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module.exports = {
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checkForUsers: checkForUsers,
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init: (io) => {
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io.on('connection', (socket) => {
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debug(`${socket.ip||socket.id} connected.`)
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// Set a few variables
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socket.ip = socket.client.request.headers['x-real-ip'];
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socket.ua = socket.client.request.headers['user-agent'];
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// Log and errors
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socket.on('log', (text) => {
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debug(`LOG: ${text}`)
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})
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socket.on('error', (err) => { console.error(err.stack) })
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// This socket can set location (app)
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socket.on('can-set', (userId) => {
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debug(`${socket.ip} can set updates for ${userId}.`)
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socket.join(userId, () => {
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debug(`${socket.ip} joined ${userId} with ${socket.ua}`)
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})
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checkForUsers(io, userId)
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})
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// This socket can receive location (map)
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socket.on('can-get', (userId) => {
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socket.gets = userId
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debug(`${socket.ip} can get updates for ${userId}.`)
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socket.join(userId, () => {
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debug(`${socket.ip} joined ${userId}`)
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socket.to(userId).emit('activate', 'true')
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})
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})
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// Set location
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socket.on('set', async (loc) => {
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debug(`${socket.ip} set location for ${loc.usr}`)
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debug(`Location was set to: ${JSON.stringify(loc)}`)
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// Get android timestamp or use server timestamp
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if (loc.ts) loc.tim = +loc.ts
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else loc.tim = Date.now()
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// Check for user and sk32 token
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if (!loc.usr) {
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console.error(
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new Error(
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`Recieved an update from ${socket.ip} without a usr!`
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).message
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)
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} else if (!loc.tok) {
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console.error(
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new Error(
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`Recieved an update from ${socket.ip} for usr ${loc.usr} without an sk32!`
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).message
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)
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} else {
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try {
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// Get loc.usr
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let user = await User.findById(sanitize(loc.usr))
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.where('sk32').equals(loc.tok)
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if (!user) {
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console.error(
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new Error(
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`Recieved an update from ${socket.ip} for ${loc.usr} with \
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tok of ${loc.tok}, but no such user was found in the db!`
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).message
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)
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} else {
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// Check that loc is newer than lastLoc
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debug(`Checking that loc of ${loc.tim} is newer than last of
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${(user.last.time)?user.last.time.getTime():user.last.time}...`)
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if (!user.last.time || loc.tim > user.last.time.getTime()) {
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// Broadcast location
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io.to(loc.usr).emit('get', loc)
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debug(`Broadcasting ${loc.lat}, ${loc.lon} to ${loc.usr}`)
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// Save in db as last seen
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user.last = {
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lat: parseFloat(loc.lat),
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lon: parseFloat(loc.lon),
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dir: parseFloat(loc.dir || 0),
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spd: parseFloat(loc.spd || 0),
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time: loc.tim
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}
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user.save()
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}
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}
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} catch (err) { console.error(err.stack) }
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}
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})
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// Shutdown (check for remaining clients)
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socket.on('disconnect', (reason) => {
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debug(`${socket.ip} disconnected ${socket.ua} because of a ${reason}.`)
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// Check if client was receiving updates
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if (socket.gets) {
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debug(`${socket.ip} left ${socket.gets}`)
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checkForUsers(io, socket.gets)
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}
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})
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})
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}
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}
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