Added emailPaymentChain

README.md

@@ -9,15 +9,16 @@ api domain: `https:\\breakups.herokuapp.com\`
 | Type | Call | Request | Response |
 |:-----|:-----|:--------|:---------|
 | `GET` | `help` | - | URL to github repository |
-| `POST` | `total` | [standard format](#standard-format) | `{ "total": 200 }` |
-| `POST` | `perPerson` | [standard format](#standard-format) | `{ "perPerson": 30 }` |
-| `POST` | `oweChart` | [standard format](#standard-format) | [standard format](#standard-format) |
-| `POST` | `sortedOweChart` | [standard format](#standard-format) | [standard format](#standard-format) |
-| `POST` | `paymentChain` | [standard format](#standard-format) | [chain format](#chain-format) |
+| `POST` | `total` | [standard](#standard) / [email](#email) | `{ "total": 200 }` |
+| `POST` | `perPerson` | [standard](#standard) ／ [email](#email) | `{ "perPerson": 30 }` |
+| `POST` | `oweChart` | [standard](#standard) ／ [email](#email) | [standard](#standard) ／ [email](#email) |
+| `POST` | `sortedOweChart` | [standard](#standard) ／ [email](#email) | [standard](#standard) ／ [email](#email) |
+| `POST` | `paymentChain` | [standard](#standard) ／ [email](#email) | [chain](#chain) |
+| `POST` | `emailPaymentChain` | [email](#email) | `["Email sent to user1@domain.com", "Email sent to user2@domain.com"]` |
 
 ## Expected Request / Response
 
-### standard format
+### standard
 
 ```JSON
 {
@@ -38,7 +39,7 @@ api domain: `https:\\breakups.herokuapp.com\`
 }
 ```
 
-### chain format
+### chain
 
 ```JSON
 [
@@ -54,3 +55,28 @@ api domain: `https:\\breakups.herokuapp.com\`
   }
 ]
 ```
+
+### email
+
+```JSON
+{
+  "users": [
+    {
+      "name": "Person1",
+      "email": "person1@domain.com",
+      "amount": 100
+    },
+    {
+      "name": "Person2",
+      "email": "person2@domain.com",
+      "amount": 50
+    },
+    {
+      "name": "Person3",
+      "email": "person3@domain.com",
+      "amount": 30
+    }
+  ],
+  "mixmax-api": "your-mixmax-api-key"
+}
+```

index.js

@@ -1,6 +1,9 @@
 var bodyParser = require('body-parser')
 var express = require('express')
 
+const got = require('got')
+var MIXMAX_API_KEY
+
 var app = express()
 var input
 
@@ -44,6 +47,20 @@ app.post('/paymentChain', function (req, res) {
   res.json(paymentChain(mergeSort(oweChart(input.users))))
 })
 
+app.post('/emailPaymentChain', function (req, res) {
+  input = req.body
+  MIXMAX_API_KEY = input['mixmax-api']
+  var sorted = mergeSort(oweChart(input.users))
+  var chain = paymentChain(sorted)
+  var emails = []
+  for (var i = 0; i < chain.length; i++) {
+    var message = messageCreation(sorted[i], sorted[i + 1], chain[i].amount)
+    send(message)
+    emails.push('Email sent to ' + sorted[i].email)
+  }
+  res.json(emails)
+})
+
 // app.listen(3000)
 app.listen(process.env.PORT)
 
@@ -117,3 +134,24 @@ function paymentChain (users) {
 
   return chain
 }
+
+function messageCreation (user1, user2, amount) {
+  var signature = '<br><br><p>Sincerely,<br><a href="https://github.com/binhonglee/Breakups">BreakupBills</a></p>'
+  var message = {}
+  message.to = user1.email
+  message.subject = 'Pay ' + user2.name + ' $' + amount
+  message.html = '<p>Please pay ' + user2.name + ' $' + amount + '</p>' + signature
+  return message
+}
+
+function send (message) {
+  got.post('https://api.mixmax.com/v1/send', {
+    body: JSON.stringify({
+      message
+    }),
+    headers: {
+      'Content-Type': 'application/json',
+      'X-API-Token': MIXMAX_API_KEY
+    }
+  })
+}

package.json

@@ -11,6 +11,7 @@
   "license": "MIT",
   "dependencies": {
     "body-parser": "^1.18.2",
-    "express": "^4.16.2"
+    "express": "^4.16.2",
+    "got": "^7.1.0"
   }
 }