infra(Analytics): track app installs and uninstalls (#160)

* add tracking

* lint

src/serverless-webhook.js

@@ -3,6 +3,7 @@
 const AWS = require('aws-sdk')
 const lambda = new AWS.Lambda()
 
+const trackInstall = require('./tasks/trackInstall')
 const isMessageForBot = require('./utils/isMessageForBot')
 
 function invokeLambda(payload) {
@@ -49,6 +50,15 @@ module.exports.handler = async (event, context) => {
         const payload =
             typeof event.body === 'string' ? JSON.parse(event.body) : event.body
 
+        if (name === 'installation') {
+            await trackInstall(payload)
+
+            return {
+                statusCode: 200,
+                body: 'Tracked install count',
+            }
+        }
+
         if (name !== 'issue_comment') {
             return {
                 statusCode: 201,

src/tasks/trackInstall/index.js

@@ -0,0 +1,33 @@
+const Analytics = require('../../utils/Analytics')
+
+function getTrackName(action) {
+    if (action === 'deleted') {
+        return 'Deleted'
+    } else if (action === 'created') {
+        return 'Created'
+    } else {
+        return 'Unknown'
+    }
+}
+
+async function trackInstall(payload) {
+    const analytics = new Analytics({
+        owner: payload.installation.account.login,
+        user: payload.sender.login,
+        log: {
+            info: console.log, // eslint-disable-line no-console
+            error: console.error, // eslint-disable-line no-console
+        },
+    })
+
+    const trackName = getTrackName(payload.action)
+    analytics.track(`trackInstallation${trackName}`, {
+        action: payload.action,
+        installation: payload.installation,
+        repositories: payload.repositories && payload.repositories.length,
+    })
+
+    await analytics.finishQueue()
+}
+
+module.exports = trackInstall

test/serverless-webhook.test.js

@@ -5,6 +5,27 @@ const {
 describe('Serverless Webhook', () => {
     const mockContext = {}
 
+    test('If installation track the install state', async () => {
+        const mockEvent = {
+            headers: {
+                'x-github-event': 'installation',
+            },
+            body: {
+                installation: {
+                    account: {
+                        login: 'testaccount',
+                    },
+                },
+                sender: {
+                    login: 'jakebolam',
+                },
+            },
+        }
+        const response = await serverlessWebhookHandler(mockEvent, mockContext)
+        expect(response.body).toEqual('Tracked install count')
+        // TODO: expect lambda.invoke TO NOT BE CALLED
+    })
+
     test('If not an issue comment, exit', async () => {
         const mockEvent = {
             headers: {