fix mem leak & ui / preview for editor

package.json

@@ -12,10 +12,17 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "bulma": "^1.0.2",
+    "katex": "^0.16.11",
     "oidc-client-ts": "^3.1.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "react-router-dom": "^7.0.1"
+    "react-markdown": "^9.0.1",
+    "react-router-dom": "^7.0.1",
+    "react-syntax-highlighter": "^15.6.1",
+    "rehype-katex": "^7.0.1",
+    "rehype-raw": "^7.0.0",
+    "remark-math": "^6.0.0"
   },
   "devDependencies": {
     "@babel/core": "^7.26.0",

src/AuthProvider.js

@@ -1,4 +1,4 @@
-import React, { createContext, useEffect, useState } from "react";
+import React, {createContext, useEffect, useMemo, useState} from "react";
 import { UserManager } from "oidc-client-ts";
 import {appConfig} from "./confs/appConfig";
 
@@ -13,7 +13,11 @@ export const AuthContext = createContext({
 const AuthProvider = ({ children }) => {
     const [user, setUser] = useState(null);
     const [roles, setRoles] = useState([]);
-    const userManager = new UserManager(appConfig.oidcConfig);
+    const userManager =
+        useMemo(() => new UserManager(appConfig.oidcConfig), []);
+
+
+        //new UserManager(appConfig.oidcConfig);
 
     useEffect(() => {
         userManager.getUser()
@@ -24,7 +28,8 @@ const AuthProvider = ({ children }) => {
                     const clientRoles = user?.profile?.resource_access?.[appConfig.kc_client_id]?.roles || [];
                     setRoles(clientRoles);
                 } else if (user && user.expired) {
-                    userManager.signinSilent()
+                    userManager
+                        .signinSilent()
                         .then((newUser) => {
                             setUser(newUser);
                             localStorage.setItem("accessToken", newUser.access_token);

src/components/Markdowns/MarkdownEditor.css

@@ -0,0 +1,102 @@
+
+.markdown-editor-container {
+    max-width: 800px;
+    margin: 0 auto;
+    padding: 20px;
+    background-color: #f8f9fa;
+    border: 1px solid #e0e0e0;
+    border-radius: 8px;
+    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+}
+.markdown-preview {
+    padding: 15px;
+    border: 1px solid #ddd;
+    border-radius: 8px;
+    background-color: #ffffff;
+    white-space: pre-wrap;
+    word-wrap: break-word;
+    overflow-x: auto;
+}
+
+.markdown-editor-header {
+    text-align: center;
+    font-size: 1.8rem;
+    font-weight: bold;
+    margin-bottom: 20px;
+    color: #363636;
+}
+
+
+.markdown-editor-form .field {
+    margin-bottom: 1.5rem;
+}
+
+
+.markdown-editor-form .label {
+    font-size: 1rem;
+    font-weight: 600;
+    color: #4a4a4a;
+}
+
+
+.markdown-editor-form .input,
+.markdown-editor-form .textarea {
+    font-size: 1rem;
+    border-radius: 6px;
+    border: 1px solid #dcdcdc;
+    transition: border-color 0.3s ease, box-shadow 0.3s ease;
+}
+
+.markdown-editor-form .input:focus,
+.markdown-editor-form .textarea:focus {
+    border-color: #3273dc;
+    box-shadow: 0 0 0 0.125em rgba(50, 115, 220, 0.25);
+    outline: none;
+}
+
+
+.markdown-editor-form .button {
+    width: 100%;
+    font-size: 1.1rem;
+    padding: 10px 15px;
+    border-radius: 6px;
+    transition: background-color 0.3s ease, transform 0.2s ease;
+}
+
+.markdown-editor-form .button:hover {
+    background-color: #276cda;
+    transform: scale(1.02);
+}
+
+
+.markdown-editor-notification {
+    text-align: center;
+    font-size: 1.2rem;
+    font-weight: bold;
+    margin-bottom: 20px;
+    padding: 10px 15px;
+    border-radius: 6px;
+}
+
+.katex-display {
+    margin: 1em 0;
+    text-align: center;
+}
+.katex {
+    font-size: 1.2rem;
+}
+
+
+code {
+    font-family: 'Courier New', Courier, monospace;
+    background-color: #f4f4f4;
+    padding: 2px 4px;
+    border-radius: 4px;
+}
+pre {
+    background-color: #2d2d2d;
+    color: #f8f8f2;
+    padding: 10px;
+    border-radius: 6px;
+    overflow-x: auto;
+}

src/components/Markdowns/MarkdownEditor.js

@@ -1,97 +1,163 @@
-import React, {useContext, useEffect, useState} from "react";
-import {AuthContext} from "../../AuthProvider";
-import {useNavigate, useParams} from "react-router-dom";
-import {fetchWithCache} from "../../utils/fetchWithCache";
+import React, { useContext, useEffect, useState } from "react";
+import { AuthContext } from "../../AuthProvider";
+import { useNavigate, useParams } from "react-router-dom";
+import { fetchWithCache } from "../../utils/fetchWithCache";
+import ReactMarkdown from "react-markdown";
+import remarkMath from "remark-math";
+import rehypeKatex from "rehype-katex";
+import rehypeRaw from "rehype-raw";
+import { Prism as SyntaxHighlighter } from "react-syntax-highlighter";
+import { okaidia } from "react-syntax-highlighter/dist/esm/styles/prism";
+import "katex/dist/katex.min.css"; // LaTeX 样式
+import "./MarkdownEditor.css";
 
 const MarkdownEditor = () => {
-    const {roles} = useContext(AuthContext);
+    const { roles } = useContext(AuthContext);
     const navigate = useNavigate();
-    const {id} = useParams()
+    const { id } = useParams();
     const [title, setTitle] = useState("");
     const [content, setContent] = useState("");
     const [path, setPath] = useState("");
 
     useEffect(() => {
-        if(id){
+        if (id) {
             fetchWithCache(`/api/markdown/${id}`)
                 .then((data) => {
                     setTitle(data.title);
                     setContent(data.content);
                     setPath(data.path);
                 })
-                .catch((err) => {console.error("failed to load markdown", err)});
+                .catch((err) => {
+                    console.error("failed to load markdown", err);
+                });
         }
     }, [id]);
 
     const handleSave = () => {
         const url = id ? `/api/markdown/${id}` : "/api/markdown";
         const method = id ? "PUT" : "POST";
-        fetch (url, {
+        fetch(url, {
             method,
             headers: {
                 "Content-Type": "application/json",
                 Authorization: `Bearer ${localStorage.getItem("accessToken")}`,
             },
-            body: JSON.stringify({title, content, path}),
+            body: JSON.stringify({ title, content, path }),
         })
             .then((res) => {
                 if (res.ok) {
                     navigate("/");
-                }else {
+                } else {
                     return res.json().then((data) => {
                         throw new Error(data.error || "Failed to save markdown");
-                    })
+                    });
                 }
             })
-        .catch((err) => {console.error("failed to load markdown", err)});
+            .catch((err) => {
+                console.error("failed to load markdown", err);
+            });
     };
 
     const hasPermission = roles.includes("admin") || roles.includes("creator");
-    if(! hasPermission)
-        return (
-            <div> Can not crete(Permission Denied)</div>
-        );
+    if (!hasPermission)
+        return <div className="notification is-danger">Permission Denied</div>;
+
     return (
-        <div>
-            <h2>{id ? "Edit Markdown" : "Create Markdown"}</h2>
-            <form>
-                <div>
-                    <label>
-                        Title:
-                        <input
-                            type="text"
-                            value={title}
-                            onChange={(e) => setTitle(e.target.value)}
-                        />
-                    </label>
+        <div className="container mt-5 markdown-editor-container">
+            <h2 className="title is-4">{id ? "Edit Markdown" : "Create Markdown"}</h2>
+            <div className="columns">
+                {/* Editor Column */}
+                <div className="column is-half">
+                    <form>
+                        {/* Title Field */}
+                        <div className="field">
+                            <label className="label">Title</label>
+                            <div className="control">
+                                <input
+                                    className="input"
+                                    type="text"
+                                    placeholder="Enter title"
+                                    value={title}
+                                    onChange={(e) => setTitle(e.target.value)}
+                                />
+                            </div>
+                        </div>
+
+                        {/* Path Field */}
+                        <div className="field">
+                            <label className="label">Path</label>
+                            <div className="control">
+                                <input
+                                    className="input"
+                                    type="text"
+                                    placeholder="Enter path"
+                                    value={path}
+                                    onChange={(e) => setPath(e.target.value)}
+                                />
+                            </div>
+                        </div>
+
+                        {/* Content Field */}
+                        <div className="field">
+                            <label className="label">Content</label>
+                            <div className="control">
+                                <textarea
+                                    className="textarea"
+                                    placeholder="Enter Markdown content"
+                                    value={content}
+                                    onChange={(e) => setContent(e.target.value)}
+                                ></textarea>
+                            </div>
+                        </div>
+
+                        {/* Save Button */}
+                        <div className="field">
+                            <div className="control">
+                                <button
+                                    className="button is-primary"
+                                    type="button"
+                                    onClick={handleSave}
+                                >
+                                    Save
+                                </button>
+                            </div>
+                        </div>
+                    </form>
                 </div>
-                <div>
-                    <label>
-                        Path:
-                        <input
-                            type="text"
-                            value={path}
-                            onChange={(e) => setPath(e.target.value)}
+
+                {/* Preview Column */}
+                <div className="column is-half">
+                    <h3 className="subtitle is-5">Preview</h3>
+                    <div className="content markdown-preview">
+                        <ReactMarkdown
+                            children={content}
+                            remarkPlugins={[remarkMath]}
+                            rehypePlugins={[rehypeKatex, rehypeRaw]}
+                            components={{
+                                code({ node, inline, className, children, ...props }) {
+                                    const match = /language-(\w+)/.exec(className || "");
+                                    return !inline && match ? (
+                                        <SyntaxHighlighter
+                                            style={okaidia}
+                                            language={match[1]}
+                                            PreTag="div"
+                                            {...props}
+                                        >
+                                            {String(children).replace(/\n$/, "")}
+                                        </SyntaxHighlighter>
+                                    ) : (
+                                        <code className={className} {...props}>
+                                            {children}
+                                        </code>
+                                    );
+                                },
+                            }}
                         />
-                    </label>
+                    </div>
                 </div>
-                <div>
-                    <label>
-                        Content:
-                        <textarea
-                            value={content}
-                            onChange={(e) => setContent(e.target.value)}
-                        />
-                    </label>
-                </div>
-                <button type="button" onClick={handleSave}>
-                    Save
-                </button>
-            </form>
+            </div>
         </div>
     );
-
-
-}
+};
 
 export default MarkdownEditor;

src/index.js

@@ -3,6 +3,9 @@ import ReactDOM from "react-dom/client";
 import App from "./App";
 import AuthProvider from "./AuthProvider";
 import {config} from "./confs/appConfig";
+import "bulma/css/bulma.min.css";
+
+
 
 //ReactDOM.render(<App />, document.getElementById("root"));