Added timer component for time sensitive promotions.

src/countDownTimer.js

@@ -0,0 +1,53 @@
+import React, { Component } from 'react';
+
+class CountDownTimer extends Component {
+    // counts down from the GMT time given in format ex{ Mon, 1 Jan 2022 08:00:00 GMT }
+    state = {
+      days: 0,
+      hours: '00',
+      minutes: '00',
+      seconds: '00',
+      finished: false
+    }
+
+    componentDidMount () {
+      setInterval(() => {
+        const endDate = new Date(this.props.date);
+        const timeLeft = endDate - new Date();
+        if (timeLeft < 1) {
+          this.setState({ finished: true });
+        } else {
+          const days = Math.floor(timeLeft / (1000 * 60 * 60 * 24));
+          const hours = Math.floor((timeLeft / (1000 * 60 * 60)) % 24);
+          const minutes = Math.floor((timeLeft / (1000 * 60)) % 60);
+          const seconds = Math.floor((timeLeft / (1000)) % 60);
+          this.setState({
+            hours: hours > 9 ? hours : `0${hours}`,
+            minutes: minutes > 9 ? minutes : `0${minutes}`,
+            seconds: seconds > 9 ? seconds : `0${seconds}`,
+            days
+          });
+        }
+      }, 1000);
+    }
+
+    PropperOutputContext () {
+      const { days, hours, minutes, seconds } = this.state;
+      if (days > 1) {
+        return `${days} Days : ${hours} Hours : ${minutes}  Minutes : ${seconds} Seconds`;
+      }
+      if (days === 1) {
+        return `${days} Day : ${hours} Hours : ${minutes}  Minutes : ${seconds} Seconds`;
+      } else {
+        return `${hours} Hours : ${minutes}  Minutes : ${seconds} Seconds`;
+      }
+    }
+
+    render () {
+      const { finished } = this.state;
+      const countdown = this.PropperOutputContext();
+      return (!finished) ? (<p>{ `${countdown}` }</p>) : (<p>Keep an eye out for time sensitive promotions!</p>);
+    }
+}
+
+export default CountDownTimer;