From ad2b48bb41ac09f8b31122e9cd095184f86de871 Mon Sep 17 00:00:00 2001
From: veyselboybay <veysel.boybay@outlook.com>
Date: Mon, 13 May 2024 19:20:56 -0400
Subject: [PATCH] Added logging service and emailing function

---
 README.md                 |  2 ++
 Server/.gitignore         |  4 +---
 Server/index.js           | 11 ++++++----
 Server/utils/logger.js    | 26 +++++++++++++++++++++++
 Server/utils/sendEmail.js | 43 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 79 insertions(+), 7 deletions(-)
 create mode 100644 Server/utils/logger.js
 create mode 100644 Server/utils/sendEmail.js

diff --git a/README.md b/README.md
index 4b5375c8f..3397a324d 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,8 @@ Configure the server with the following environmental variables
 | ENV Varialbe Name    | Required/Optional | Type   | Description                       |
 | -------------------- | ----------------- | ------ | --------------------------------- |
 | DB_CONNECTION_STRING | Required          | string | Specfies URL for MongoDB Database |
+| MAILERSEND_API_KEY   | Required          | string | Specfies API KEY for MailerSend service |
+| SYSTEM_EMAIL_ADDRESS | Required          | string | Specfies System email to be used in emailing service |
 
 ---
 
diff --git a/Server/.gitignore b/Server/.gitignore
index e27ddd889..1dcef2d9f 100644
--- a/Server/.gitignore
+++ b/Server/.gitignore
@@ -1,4 +1,2 @@
 node_modules
-.env
-utils/sendEmail.js
-utils/logger.js
\ No newline at end of file
+.env
\ No newline at end of file
diff --git a/Server/index.js b/Server/index.js
index 8487c5012..967a9899b 100644
--- a/Server/index.js
+++ b/Server/index.js
@@ -5,6 +5,7 @@ const authRouter = require("./routes/authRoute");
 const monitorRouter = require("./routes/monitorRoute");
 const { connectDbAndRunServer } = require("./configs/db");
 require("dotenv").config();
+const logger = require('./utils/logger');
 // const { sendEmail } = require('./utils/sendEmail')
 
 // **************************
@@ -53,15 +54,17 @@ app.use("/api/v1/monitors", monitorRouter);
 
 // Testing email service
 // app.use('/sendEmail', async (req, res) => {
-//     const response = sendEmail('veysel.boybay@outlook.com', ['veysel.boybay@bluewavelabs.ca'], 'Testing email service', '<h1>Testing Bluewavelabs</h1>');
+//     const response = sendEmail(['veysel.boybay@bluewavelabs.ca'], 'Testing email service', '<h1>Testing Bluewavelabs</h1>');
 //     console.log(response);
 // })
 
 //health check
 app.use("/api/v1/healthy", (req, res) => {
-  try {
-    return res.status(200).json({ message: "Healthy" });
-  } catch (error) {
+    try {
+      logger.info("Checking Health of the server.")
+        return res.status(200).json({ message: "Healthy" });
+    } catch (error) {
+        logger.error(error.message)
     return res.status(500).json({ message: error.message });
   }
 });
diff --git a/Server/utils/logger.js b/Server/utils/logger.js
new file mode 100644
index 000000000..a8f65527c
--- /dev/null
+++ b/Server/utils/logger.js
@@ -0,0 +1,26 @@
+const winston = require('winston');
+/**
+ * @module
+ * @example
+ * logger.info("Registered a new user!") 
+ * logger.warn("User not found!")
+ * logger.error("Cannot save")
+ * @example
+ * "Specify service and ID in the log if applicable."
+ * logger.error("Descriptive Message",{"service":"monitor","monitorId":"123456"})
+ * logger.error("Incorrect Credentials",{"service":"Auth","userId":"654321"})
+ * logger.error("User not found!",{"service":"Auth"})
+ */
+const logger = winston.createLogger({
+  level: 'info',
+    format: winston.format.combine(
+        winston.format.timestamp(),
+        winston.format.json()
+    ),
+    transports: [
+    new winston.transports.Console(),
+    new winston.transports.File({ filename: 'app.log' }),
+  ],
+});
+
+module.exports = logger;
\ No newline at end of file
diff --git a/Server/utils/sendEmail.js b/Server/utils/sendEmail.js
new file mode 100644
index 000000000..712a651bd
--- /dev/null
+++ b/Server/utils/sendEmail.js
@@ -0,0 +1,43 @@
+const { MailerSend, EmailParams, Sender, Recipient } = require('mailersend')
+const logger = require('../utils/logger')
+
+
+const mailersend = new MailerSend({
+    apiKey: process.env.MAILERSEND_API_KEY,
+})
+/**
+ * @function
+ * @param {[string]} receivers - takes an array of strings
+ * @param {string} subject - takes a single string
+ * @param {string} contentHTML - takes a single string that contains HTML
+ * @returns {JSON}
+ * @example 
+ * sendEmail(['veysel@bluewavelabs.ca','alex@bluewavelabs.ca','monzer@bluewavelabs.ca'],'Testing Email Servide','<h1>BlueWaveLabs</h1>')
+ */
+// TODO: from email should be in .env file 
+const sendEmail = async (receivers,subject,contentHTML) => {
+    // Sender
+    const from = process.env.SYSTEM_EMAIL_ADDRESS;
+    const sender = new Sender(from);
+    // receivers
+    let recipients = []
+    receivers.map(email => recipients.push(new Recipient(email)));
+    // Set params
+    const emailParams = new EmailParams()
+        .setFrom(sender)
+        .setTo(recipients)
+        .setSubject(subject)
+        .setHtml(contentHTML);
+    
+    try {
+        const response = await mailersend.email.send(emailParams);
+        logger.info("Email sent to receivers!",{"service":"Email"})
+        return response;
+
+    } catch (error) {
+        logger.error(error.body,{"service":"email"})
+        console.log(error.body)
+    }
+}
+
+module.exports = {sendEmail}
\ No newline at end of file