feat: add real time logger page (#276)

* feat: add real time logger

* feat: add subscription for logging

* feat: use timestamp and level in xterm, migrate to new xterm package

* feat: improve design on log page

* fit: remove xterm fit addon

* fix: dispose terminal correctly

* style: format code

* refactor: add jsdoc for redis-transport

* fix: redis connection not possible sometimes

* feat: make terminal full size

* fix: deepsource issues

* fix: lint issue

---------

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

apps/nextjs/src/app/[locale]/boards/_client.tsx

@@ -9,6 +9,7 @@ import { Box, LoadingOverlay, Stack } from "@homarr/ui";
 import { BoardCategorySection } from "~/components/board/sections/category-section";
 import { BoardEmptySection } from "~/components/board/sections/empty-section";
 import { BoardBackgroundVideo } from "~/components/layout/background";
+import { fullHeightWithoutHeaderAndFooter } from "~/constants";
 import { useIsBoardReady, useRequiredBoard } from "./_context";
 
 let boardName: string | null = null;
@@ -58,7 +59,7 @@ export const ClientBoard = () => {
         visible={!isReady}
         transitionProps={{ duration: 500 }}
         loaderProps={{ size: "lg" }}
-        h="calc(100dvh - var(--app-shell-header-offset, 0px) - var(--app-shell-padding) - var(--app-shell-footer-offset, 0px) - var(--app-shell-padding))"
+        h={fullHeightWithoutHeaderAndFooter}
       />
       <Stack
         ref={ref}

apps/nextjs/src/app/[locale]/manage/layout.tsx

@@ -11,6 +11,7 @@ import {
   IconHome,
   IconInfoSmall,
   IconLayoutDashboard,
+  IconLogs,
   IconMailForward,
   IconQuestionMark,
   IconTool,
@@ -61,6 +62,11 @@ export default async function ManageLayout({ children }: PropsWithChildren) {
           icon: IconBrandDocker,
           href: "/manage/tools/docker",
         },
+        {
+          label: t("items.tools.items.logs"),
+          icon: IconLogs,
+          href: "/manage/tools/logs",
+        },
       ],
     },
     {

apps/nextjs/src/app/[locale]/manage/tools/logs/page.tsx

@@ -0,0 +1,34 @@
+import { getScopedI18n } from "@homarr/translation/server";
+import { Box } from "@homarr/ui";
+
+import "@xterm/xterm/css/xterm.css";
+
+import dynamic from "next/dynamic";
+
+import { fullHeightWithoutHeaderAndFooter } from "~/constants";
+
+export async function generateMetadata() {
+  const t = await getScopedI18n("management");
+  const metaTitle = `${t("metaTitle")} • Homarr`;
+
+  return {
+    title: metaTitle,
+  };
+}
+
+const ClientSideTerminalComponent = dynamic(() => import("./terminal"), {
+  ssr: false,
+});
+
+export default function LogsManagementPage() {
+  return (
+    <Box
+      style={{ borderRadius: 6 }}
+      h={fullHeightWithoutHeaderAndFooter}
+      p="md"
+      bg="black"
+    >
+      <ClientSideTerminalComponent />
+    </Box>
+  );
+}

apps/nextjs/src/app/[locale]/manage/tools/logs/terminal.module.css

@@ -0,0 +1,3 @@
+.outerTerminal > div {
+  height: 100%;
+}

apps/nextjs/src/app/[locale]/manage/tools/logs/terminal.tsx

@@ -0,0 +1,66 @@
+"use client";
+
+import { useEffect, useRef } from "react";
+import { CanvasAddon } from "@xterm/addon-canvas";
+import { Terminal } from "@xterm/xterm";
+import { FitAddon } from "xterm-addon-fit";
+
+import { clientApi } from "@homarr/api/client";
+import { Box } from "@homarr/ui";
+
+import classes from "./terminal.module.css";
+
+export default function TerminalComponent() {
+  const ref = useRef<HTMLDivElement>(null);
+
+  const terminalRef = useRef<Terminal>();
+  clientApi.log.subscribe.useSubscription(undefined, {
+    onData(data) {
+      terminalRef.current?.writeln(
+        `${data.timestamp} ${data.level} ${data.message}`,
+      );
+      terminalRef.current?.refresh(0, terminalRef.current.rows - 1);
+    },
+    onError(err) {
+      // This makes sense as logging might cause an infinite loop
+      alert(err);
+    },
+  });
+
+  useEffect(() => {
+    if (!ref.current) {
+      return () => undefined;
+    }
+
+    const canvasAddon = new CanvasAddon();
+
+    terminalRef.current = new Terminal({
+      cursorBlink: false,
+      disableStdin: true,
+      convertEol: true,
+    });
+    terminalRef.current.open(ref.current);
+    terminalRef.current.loadAddon(canvasAddon);
+
+    // This is a hack to make sure the terminal is rendered before we try to fit it
+    // You can blame @Meierschlumpf for this
+    setTimeout(() => {
+      const fitAddon = new FitAddon();
+      terminalRef.current?.loadAddon(fitAddon);
+      fitAddon.fit();
+    });
+
+    return () => {
+      terminalRef.current?.dispose();
+      canvasAddon.dispose();
+    };
+  }, []);
+  return (
+    <Box
+      ref={ref}
+      id="terminal"
+      className={classes.outerTerminal}
+      h="100%"
+    ></Box>
+  );
+}

apps/nextjs/src/constants.ts

@@ -0,0 +1,2 @@
+export const fullHeightWithoutHeaderAndFooter =
+  "calc(100dvh - var(--app-shell-header-offset, 0px) - var(--app-shell-padding) - var(--app-shell-footer-offset, 0px) - var(--app-shell-padding))";