Enhancement: resources network widget (#4327)

docs/installation/k8s.md

@@ -175,6 +175,7 @@ data:
         expanded: true
         cpu: true
         memory: true
+        network: default
     - search:
         provider: duckduckgo
         target: _blank
@@ -370,7 +371,7 @@ prevent unnecessary re-renders on page loads and window / tab focusing. The
 procedure for enabling sticky sessions depends on your Ingress controller. Below
 is an example using Traefik as the Ingress controller.
 
-```
+```yaml
 apiVersion: traefik.io/v1alpha1
 kind: IngressRoute
 metadata:

docs/widgets/info/resources.md

@@ -24,9 +24,10 @@ _Note: unfortunately, the package used for getting CPU temp ([systeminformation]
     tempmin: 0 # optional, minimum cpu temp
     tempmax: 100 # optional, maximum cpu temp
     uptime: true
-    units: imperial # only used by cpu temp
+    units: imperial # only used by cpu temp, options: 'imperial' or 'metric'
     refresh: 3000 # optional, in ms
     diskUnits: bytes # optional, bytes (default) or bbytes. Only applies to disk
+    network: true # optional, uses 'default' if true or specify a network interface name
 ```
 
 You can also pass a `label` option, which allows you to group resources under named sections,

src/components/widgets/resources/network.jsx

@@ -0,0 +1,47 @@
+import useSWR from "swr";
+import { FaNetworkWired } from "react-icons/fa";
+import { useTranslation } from "next-i18next";
+
+import Resource from "../widget/resource";
+import Error from "../widget/error";
+
+export default function Network({ options, refresh = 1500 }) {
+  const { t } = useTranslation();
+  // eslint-disable-next-line no-param-reassign
+  if (options.network === true) options.network = "default";
+
+  const { data, error } = useSWR(`/api/widgets/resources?type=network&interfaceName=${options.network}`, {
+    refreshInterval: refresh,
+  });
+
+  if (error || data?.error) {
+    return <Error />;
+  }
+
+  if (!data || !data.network) {
+    return (
+      <Resource
+        icon={FaNetworkWired}
+        value="- ↑"
+        label="- ↓"
+        expandedValue="- ↑"
+        expandedLabel="- ↓"
+        percentage="0"
+        wide
+      />
+    );
+  }
+
+  return (
+    <Resource
+      icon={FaNetworkWired}
+      value={`${t("common.byterate", { value: data.network.tx_sec })} ↑`}
+      label={`${t("common.byterate", { value: data.network.rx_sec })} ↓`}
+      expandedValue={`${t("common.bytes", { value: data.network.tx_bytes })} ↑`}
+      expandedLabel={`${t("common.bytes", { value: data.network.rx_bytes })} ↓`}
+      expanded={options.expanded}
+      wide
+      percentage={(100 * data.network.rx_sec) / (data.network.rx_sec + data.network.tx_sec)}
+    />
+  );
+}

src/components/widgets/resources/resources.jsx

@@ -6,6 +6,7 @@ import Cpu from "./cpu";
 import Memory from "./memory";
 import CpuTemp from "./cputemp";
 import Uptime from "./uptime";
+import Network from "./network";
 
 export default function Resources({ options }) {
   const { expanded, units, diskUnits, tempmin, tempmax } = options;
@@ -23,6 +24,7 @@ export default function Resources({ options }) {
                 <Disk key={disk} options={{ disk }} expanded={expanded} diskUnits={diskUnits} refresh={refresh} />
               ))
             : options.disk && <Disk options={options} expanded={expanded} diskUnits={diskUnits} refresh={refresh} />}
+          {options.network && <Network options={options} refresh={refresh} />}
           {options.cputemp && (
             <CpuTemp expanded={expanded} units={units} refresh={refresh} tempmin={tempmin} tempmax={tempmax} />
           )}

src/components/widgets/widget/resource.jsx

@@ -10,6 +10,7 @@ export default function Resource({
   percentage,
   expanded = false,
   additionalClassNames = "",
+  wide = false,
 }) {
   const Icon = icon;
 
@@ -18,7 +19,11 @@ export default function Resource({
       className={`flex-none flex flex-row items-center mr-3 py-1.5 information-widget-resource ${additionalClassNames}`}
     >
       <Icon className="text-theme-800 dark:text-theme-200 w-5 h-5 resource-icon" />
-      <div className={`flex flex-col ml-3 text-left min-w-[85px] ${expanded ? " expanded" : ""}`}>
+      <div
+        className={`flex flex-col ml-3 text-left ${expanded ? " expanded" : ""} ${
+          wide ? " min-w-[120px]" : "min-w-[85px]"
+        }`}
+      >
         <div className="text-theme-800 dark:text-theme-200 text-xs flex flex-row justify-between">
           <div className="pl-0.5">{value}</div>
           <div className="pr-1">{label}</div>

src/pages/api/widgets/resources.js

@@ -7,7 +7,7 @@ const logger = createLogger("resources");
 const si = require("systeminformation");
 
 export default async function handler(req, res) {
-  const { type, target } = req.query;
+  const { type, target, interfaceName = "default" } = req.query;
 
   if (type === "cpu") {
     const load = await si.currentLoad();
@@ -57,6 +57,32 @@ export default async function handler(req, res) {
     });
   }
 
+  if (type === "network") {
+    let networkData = await si.networkStats();
+    let interfaceDefault;
+    logger.debug("networkData:", JSON.stringify(networkData));
+    if (interfaceName && interfaceName !== "default") {
+      networkData = networkData.filter((network) => network.iface === interfaceName)[0];
+      if (!networkData) {
+        return res.status(404).json({
+          error: "Interface not found",
+        });
+      }
+    } else {
+      interfaceDefault = await si.networkInterfaceDefault();
+      networkData = networkData.filter((network) => network.iface === interfaceDefault)[0];
+      if (!networkData) {
+        return res.status(404).json({
+          error: "Default interface not found",
+        });
+      }
+    }
+    return res.status(200).json({
+      network: networkData,
+      interface: interfaceName !== "default" ? interfaceName : interfaceDefault,
+    });
+  }
+
   return res.status(400).json({
     error: "invalid type",
   });