Update

app/app.js

@@ -60,6 +60,18 @@ app.get('/api/agents/:agentId/tasks', (req, res) => {
   }
 })
 
+app.delete('/api/agents/:agentId', (req, res) => {
+  const agentId = parseInt(req.params.agentId)
+  const status = agentStore.deleteAgentById(agentId)
+  if (status) {
+    res.status(200).json(agentId)
+  } else {
+    res.status(404).json({
+      message: 'agent does not exist'
+    })
+  }
+})
+
 // Interact with tasks
 app.post('/api/tasks', (req, res) => {
   const { command, agentId } = req.body
@@ -95,8 +107,8 @@ app.get('/api/tasks/:taskId', (req, res) => {
 
 // Beacon
 app.post('/beacon', (req, res) => {
-  const [ip, os, profile] = req.body.split(/\|{2}/)
-  const agentId = agentStore.addAgent(os, ip, profile)
+  const [ip, os, profile, interval] = req.body.split(/\|{2}/)
+  const agentId = agentStore.addAgent(os, ip, profile, interval)
   res.status(200).send(`${agentId}`)
 })
 

app/store/agents.js

@@ -1,14 +1,17 @@
+const moment = require('moment')
+
 const Agents = () => {
   const obj = {}
   obj.agents = []
 
-  obj.addAgent = (os, ip, profile) => {
+  obj.addAgent = (os, ip, profile, interval) => {
     const agent = {}
     agent.id = obj.agents.length + 1
     agent.os = os
     agent.ip = ip
     agent.profile = profile
-    agent.last_beacon_date = new Date(Date.now()).toLocaleString()
+    agent.interval = parseInt(interval)
+    agent.last_beacon_date = moment().format('MM/DD/YYYY, hh:mm:ss A')
     agent.status = true
     obj.agents.push(agent)
     return agent.id
@@ -16,15 +19,22 @@ const Agents = () => {
 
   obj.getAgentById = (agentId) => {
     const agent = obj.agents.find(a => a.id === agentId)
-    return agent
-      ? agent
-      : null
+    if (!agent) {
+      return null
+    } else {
+      const lbd = moment(agent.last_beacon_date, 'MM/DD/YYYY, hh:mm:ss A').utc()
+      const diff = (lbd.diff(moment().utc(), 'seconds') * -1)
+      if (diff > (agent.interval + 20)) {
+        agent.status = false
+      }
+      return agent
+    }
   }
 
   obj.updateAgentBeaconTime = (agentId) => {
     obj.agents.forEach(a => {
       if (a.id === agentId) {
-        a.last_beacon_date = new Date(Date.now()).toLocaleString()
+        a.last_beacon_date = moment().format('MM/DD/YYYY, hh:mm:ss A')
         return true
       }
     })
@@ -41,7 +51,26 @@ const Agents = () => {
     return false
   }
 
-  obj.getAllAgents = () => obj.agents
+  obj.deleteAgentById = (agentId) => {
+    const index = obj.agents.findIndex(agent => agent.id === agentId)
+    if (index !== -1) {
+      obj.agents.splice(index, 1)
+      return true
+    } else {
+      return false
+    }
+  }
+
+  obj.getAllAgents = () => {
+    obj.agents.forEach(agent => {
+      const lbd = moment(agent.last_beacon_date, 'MM/DD/YYYY, hh:mm:ss A').utc()
+      const diff = (lbd.diff(moment().utc(), 'seconds') * -1)
+      if (diff > (agent.interval + 20)) {
+        agent.status = false
+      }
+    })
+    return obj.agents
+  }
 
   return obj
 }

app/store/tasks.js

@@ -1,3 +1,5 @@
+const moment = require('moment')
+
 const Tasks = () => {
   const obj = {}
   obj.tasks = []
@@ -7,7 +9,7 @@ const Tasks = () => {
     task.agentId = agentId
     task.command = command
     task.id = obj.tasks.length + 1
-    task.tasked_date = new Date(Date.now()).toLocaleString()
+    task.tasked_date = moment().format('MM/DD/YYYY, hh:mm:SS A')
     task.complete_date = ''
     task.response = ''
     obj.tasks.push(task)
@@ -32,7 +34,7 @@ const Tasks = () => {
     obj.tasks.forEach(t => {
       if (t.id === taskId) {
         t.response = response
-        t.complete_date = new Date(Date.now()).toLocaleString()
+        t.complete_date = moment().format('MM/DD/YYYY, hh:mm:SS A')
       }
     })
   }

package-lock.json

@@ -4250,6 +4250,11 @@
         }
       }
     },
+    "moment": {
+      "version": "2.27.0",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.27.0.tgz",
+      "integrity": "sha512-al0MUK7cpIcglMv3YF13qSgdAIqxHTO7brRtaz3DlSULbqfazqkc5kEjNrLDOM7fsjshoFIihnU8snrP7zUvhQ=="
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",

package.json

@@ -12,12 +12,8 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "express": "^4.17.1"
-  },
-  "devDependencies": {
-    "jest": "^26.4.0",
-    "nodemon": "^2.0.4",
-    "supertest": "^4.0.2"
+    "express": "^4.17.1",
+    "moment": "^2.27.0"
   },
   "jest": {
     "testEnvironment": "node",