include real stats from siastats.info

src/components/HomeNetwork/HomeNetwork.js

@@ -1,32 +1,31 @@
-import React, { Component } from "react";
+import React, { useState } from "react";
+import PropTypes from "prop-types";
 import CountUp from "react-countup";
 import VisibilitySensor from "react-visibility-sensor";
 import Fade from "react-reveal/Fade";
 
+import useStats, { AVAILABLE_STATS } from "./useStats";
 import "./HomeNetwork.scss";
 import { CircleIcon, FAQ } from "../";
 import { SmallOrb, LogoSolid, Deco6, Deco7, Deco8 } from "../../svg";
 
-const stats = [
-  { name: "TB Used", value: 664 },
-  { name: "TB Capacity", value: 2315 },
-  { name: "Hosts", value: 335 },
-  { name: "Storage/TB", value: 91, cent: true },
-  { name: "Bandwidth/TB", value: 18, cent: true }
+const STATS_MAP = [
+  { name: "TB Used", key: AVAILABLE_STATS.STORAGE_USED_TB },
+  { name: "TB Capacity", key: AVAILABLE_STATS.NETWORK_CAPACITY_TB },
+  { name: "Hosts", key: AVAILABLE_STATS.ONLINE_HOSTS_COUNT },
+  { name: "Storage/TB", key: AVAILABLE_STATS.STORAGE_COST_USD, currency: true },
+  { name: "Bandwidth/TB", key: AVAILABLE_STATS.BANDWIDTH_DOWN_COST_USD, currency: true }
 ];
 
-export default class HomeNetwork extends Component {
-  state = {
-    visable: false
-  };
-
-  onChange = isVisible => {
-    if (isVisible && !this.state.visable) {
-      this.setState({ visable: true });
+export default function HomeNetwork() {
+  const [visible, setVisible] = useState(false);
+  const stats = useStats();
+  const onChange = isVisible => {
+    if (isVisible && !visible) {
+      setVisible(true);
     }
   };
 
-  render() {
   return (
     <div className="home-network">
       <header className="home-network-header">
@@ -50,16 +49,14 @@ export default class HomeNetwork extends Component {
       </header>
 
       <Fade duration={700} distance="40px" bottom>
-          <VisibilitySensor onChange={this.onChange} partialVisibility offset={{ bottom: 100 }} scrollThrottle={50}>
+        <VisibilitySensor onChange={onChange} partialVisibility offset={{ bottom: 100 }} scrollThrottle={50}>
+          <React.Fragment>
             <div className="home-network-stats">
-              {stats.map((stat, i) => (
+              {STATS_MAP.map((stat, i) => (
                 <React.Fragment key={i}>
                   <div key={i} className="home-network-stat">
                     <div className="inner">
-                      <h3>
-                        {this.state.visable ? <CountUp end={stat.value} duration={3.2} /> : 0}
-                        {stat.cent && "¢"}
-                      </h3>
+                      {visible && <StatValue stat={stat} value={stats[stat.key]} />}
                       <span className="network-stat-name">{stat.name}</span>
                     </div>
                   </div>
@@ -70,6 +67,13 @@ export default class HomeNetwork extends Component {
               <Deco7 className="deco-7" />
               <Deco8 className="deco-8" />
             </div>
+            <div className="home-network-stats-provider">
+              stats provided by{" "}
+              <a href="https://siastats.info" target="_blank" rel="noopener noreferrer">
+                siastats.info
+              </a>
+            </div>
+          </React.Fragment>
         </VisibilitySensor>
       </Fade>
 
@@ -79,10 +83,10 @@ export default class HomeNetwork extends Component {
             <p>
               <strong>Skynet Webportals</strong> are low cost servers that sit between Skynet and everyday users,
               enabling them to access Skynet content without needing to operate any special software. As Skylinks are
-                generated, they can be shared with anyone to retrieve data from any Webportal. The original uploader
-                does not need to stay online in order for the file to remain available. The Sia network serves as the
-                backend storage layer for Skynet and handles all of the pinning, guaranteeing both high speeds and
-                excellent uptime.
+              generated, they can be shared with anyone to retrieve data from any Webportal. The original uploader does
+              not need to stay online in order for the file to remain available. The Sia network serves as the backend
+              storage layer for Skynet and handles all of the pinning, guaranteeing both high speeds and excellent
+              uptime.
             </p>
           </Fade>
 
@@ -121,8 +125,8 @@ export default class HomeNetwork extends Component {
           <Fade duration={700} distance="40px" bottom>
             <FAQ title="How do I integrate Skynet into my app?">
               <p>
-                  Applications can be deployed in under a minute and be immediately available globally. Skynet includes
-                  an API and SDKs which integrate seamlessly with existing applications.
+                Applications can be deployed in under a minute and be immediately available globally. Skynet includes an
+                API and SDKs which integrate seamlessly with existing applications.
                 <a
                   href="https://skynet.helpdocs.io/article/hrshqsn9wz-integrating-skynet"
                   target="_blank"
@@ -171,4 +175,25 @@ export default class HomeNetwork extends Component {
     </div>
   );
 }
+
+function StatValue({ stat, value }) {
+  const displayDollars = stat.currency && value >= 1;
+  const displayCents = stat.currency && value < 1;
+
+  return (
+    <h3>
+      {displayDollars && "$"}
+      <CountUp end={displayCents ? value * 100 : value} duration={3.2} decimals={displayDollars ? 2 : 0} />
+      {displayCents && "¢"}
+    </h3>
+  );
 }
+
+StatValue.propTypes = {
+  stat: PropTypes.shape({
+    key: PropTypes.string.isRequired,
+    name: PropTypes.string.isRequired,
+    currency: PropTypes.bool
+  }).isRequired,
+  value: PropTypes.number.isRequired
+};

src/components/HomeNetwork/HomeNetwork.scss

@@ -65,6 +65,21 @@
   }
 }
 
+.home-network-stats-provider {
+  text-align: right;
+  color: $green;
+  font-size: 13px;
+  margin-right: 12px; // keep the same as the border radius of .home-network-stats
+
+  a {
+    color: $green;
+
+    &:hover {
+      color: $black;
+    }
+  }
+}
+
 .deco-6 {
   position: absolute;
   top: -185px;

src/components/HomeNetwork/useStats.js

@@ -0,0 +1,68 @@
+import { useEffect, useState } from "react";
+
+export const AVAILABLE_STATS = {
+  ONLINE_HOSTS_COUNT: "onlineHostsCount",
+  STORAGE_USED_TB: "storageUsedTB",
+  NETWORK_CAPACITY_TB: "networkCapacityTB",
+  STORAGE_COST_USD: "storageCostUSD",
+  BANDWIDTH_DOWN_COST_USD: "bandwidthDownCostUSD"
+};
+
+export default function useStats() {
+  const [stats, setStats] = useState({
+    [AVAILABLE_STATS.ONLINE_HOSTS_COUNT]: null,
+    [AVAILABLE_STATS.STORAGE_USED_TB]: null,
+    [AVAILABLE_STATS.NETWORK_CAPACITY_TB]: null,
+    [AVAILABLE_STATS.STORAGE_COST_USD]: null,
+    [AVAILABLE_STATS.BANDWIDTH_DOWN_COST_USD]: null
+  });
+
+  useEffect(() => {
+    async function fetchData() {
+      const [bandwidth, storage, price] = await Promise.all([getBandwidthStats(), getStorageStats(), getPriceStats()]);
+
+      setStats({ ...bandwidth, ...storage, ...price });
+    }
+
+    fetchData();
+  }, [setStats]);
+
+  return stats;
+}
+
+async function getBandwidthStats() {
+  // { up: 76.09, down: 102.66, upusd: 0.23, downusd: 0.32 }
+  const response = await fetch("https://siastats.info/dbs/bandwidthpricesdb.json");
+  const data = await response.json();
+  const current = data[data.length - 1];
+
+  return {
+    [AVAILABLE_STATS.BANDWIDTH_DOWN_COST_USD]: current.downusd
+  };
+}
+
+async function getPriceStats() {
+  // { price: 504.59, newcontractformation: 30.79, usd: 1.55, sfperfees: 8.98 }
+  const response = await fetch("https://siastats.info/dbs/storagepricesdb.json");
+  const data = await response.json();
+  const current = data[data.length - 1];
+
+  return {
+    [AVAILABLE_STATS.STORAGE_COST_USD]: current.usd
+  };
+}
+
+async function getStorageStats() {
+  // { block_height: 247816, block_timestamp: 1582285828, hashrate: 6212581269715416,
+  // difficulty: 3501953420754597000, coin_supply: 43638591164, coin_price_USD: 0.003,
+  // market_cap_USD: 130915773, used_storage_TB: 725.26, network_capacity_TB: 2270.96,
+  // online_hosts: 360, active_contracts: 62997 }
+  const response = await fetch("https://siastats.info/dbs/network_status.json");
+  const data = await response.json();
+
+  return {
+    [AVAILABLE_STATS.ONLINE_HOSTS_COUNT]: data.online_hosts,
+    [AVAILABLE_STATS.STORAGE_USED_TB]: data.used_storage_TB,
+    [AVAILABLE_STATS.NETWORK_CAPACITY_TB]: data.network_capacity_TB
+  };
+}