add: markdown deletion

src/components/Markdowns/StandaloneMarkdownPage.js

@@ -0,0 +1,100 @@
+import React, { useEffect, useState } from "react";
+import { useLocation } from "react-router-dom";
+import "katex/dist/katex.min.css";
+import "./MarkdownContent.css";
+import MarkdownView from "./MarkdownView";
+import { useMarkdown } from "../../utils/queries/markdown-queries";
+import { useMarkdownSetting } from "../../utils/queries/markdown-setting-queries";
+import { useMarkdownTemplate } from "../../utils/queries/markdown-template-queries";
+import { useMarkdownTemplateSetting } from "../../utils/queries/markdown-template-setting-queries";
+import { useTree } from "../../utils/queries/tree-queries";
+import { getMarkdownIdByPath } from "../../utils/pathUtils";
+
+const StandaloneMarkdownPage = () => {
+    const location = useLocation();
+    const [indexTitle, setIndexTitle] = useState(null);
+    const [markdownId, setMarkdownId] = useState(null);
+    
+    // Extract path from /pg/project/index -> project/index
+    const pathString = location.pathname.replace(/^\/pg\//, '');
+    
+    const { data: tree, isLoading: isTreeLoading } = useTree();
+    const { data: markdown, isLoading: isMarkdownLoading, error } = useMarkdown(markdownId);
+    const { data: setting, isFetching: isSettingFetching } = useMarkdownSetting(markdown?.setting_id);
+    const { data: templateSetting, isFetching: isTemplateSettingFetching } = useMarkdownTemplateSetting(setting?.template_setting_id);
+    const { data: template, isFetching: isTemplateFetching } = useMarkdownTemplate(templateSetting?.template_id);
+
+    // Resolve markdown ID from path using tree
+    useEffect(() => {
+        if (tree && pathString) {
+            const resolvedId = getMarkdownIdByPath(tree, pathString);
+            setMarkdownId(resolvedId);
+        }
+    }, [tree, pathString]);
+
+    useEffect(() => {
+        if (markdown && markdown.title === "index" && pathString) {
+            const pathParts = pathString.split('/').filter(part => part.length > 0);
+            
+            if (pathParts.length === 0) {
+                // Root index: /pg/ or /pg
+                setIndexTitle("Home");
+            } else {
+                // Directory index: /pg/Projects or /pg/Projects/project1
+                // Use the last directory name as title
+                const directoryName = pathParts[pathParts.length - 1];
+                setIndexTitle(directoryName);
+            }
+        }
+    }, [markdown, pathString]);
+
+    const notReady = isTreeLoading || isMarkdownLoading || isSettingFetching || isTemplateSettingFetching || isTemplateFetching;
+
+    if (notReady) {
+        return (
+            <div style={{ padding: "2rem", textAlign: "center" }}>
+                <div>Loading...</div>
+            </div>
+        );
+    }
+
+    if (error) {
+        return (
+            <div style={{ padding: "2rem", textAlign: "center" }}>
+                <div>Error: {error.message || "Failed to load content"}</div>
+            </div>
+        );
+    }
+
+    if (!notReady && !markdownId) {
+        return (
+            <div style={{ padding: "2rem", textAlign: "center" }}>
+                <div>Markdown not found for path: {pathString}</div>
+            </div>
+        );
+    }
+
+    if (markdown?.isMessage) {
+        return (
+            <div style={{ padding: "2rem" }}>
+                <div className="notification is-info">
+                    <h4 className="title is-4">{markdown.title}</h4>
+                    <p>{markdown.content}</p>
+                </div>
+            </div>
+        );
+    }
+
+    return (
+        <div style={{ padding: "2rem", maxWidth: "100%", margin: "0 auto" }}>
+            <div style={{ marginBottom: "2rem" }}>
+                <h1 className="title">{markdown?.title === "index" ? indexTitle : markdown?.title}</h1>
+            </div>
+            {markdown && (
+                <MarkdownView content={JSON.parse(markdown.content)} template={template} />
+            )}
+        </div>
+    );
+};
+
+export default StandaloneMarkdownPage;

src/components/Navigations/MarkdownNode.js

@@ -1,9 +1,30 @@
-import {Link} from "react-router-dom";
+import {Link, useNavigate} from "react-router-dom";
 import PermissionGuard from "../PermissionGuard";
 import React, {useState} from "react";
 import MarkdownSettingModal from "../Modals/MarkdownSettingModal";
+import {useDeleteMarkdown} from "../../utils/queries/markdown-queries";
+import {useDeleteMarkdownSetting} from "../../utils/queries/markdown-setting-queries";
 const MarkdownNode = ({markdown, handleMoveMarkdown}) => {
     const [isMarkdownSettingModalOpen, setIsMarkdownSettingModalOpen] = useState(false);
+    const navigate = useNavigate();
+    const deleteMarkdown = useDeleteMarkdown();
+    const deleteMarkdownSetting = useDeleteMarkdownSetting();
+    
+    const handleDeleteMarkdown = async () => {
+        if (!window.confirm(`delete markdown "${markdown.title}" ? this action cannot be undone.`)) {
+            return;
+        }
+        
+        try {
+            await deleteMarkdown.mutateAsync(markdown.id);
+
+            if (window.location.pathname === `/markdown/${markdown.id}`) {
+                navigate('/');
+            }
+        } catch (error) {
+            alert('failed: ' + (error.message || 'unknown error'));
+        }
+    };
     return (
         <li key={markdown.id}>
             <div className="is-clickable field has-addons">
@@ -24,6 +45,18 @@ const MarkdownNode = ({markdown, handleMoveMarkdown}) => {
                             </span>
                         </button>
                     </p>
+                    <p className="control">
+                        <button
+                            className="button is-small is-danger"
+                            onClick={handleDeleteMarkdown}
+                            type="button"
+                            disabled={deleteMarkdown.isLoading || deleteMarkdownSetting.isLoading}
+                        >
+                            <span className="icon">
+                                <i className="fas fa-trash"/>
+                            </span>
+                        </button>
+                    </p>
                     <div
                         className="control is-flex is-flex-direction-column is-align-items-center"
                         style={{marginLeft: "0.5rem"}}

src/utils/pathUtils.js

@@ -0,0 +1,45 @@
+export const findMarkdownByPath = (tree, pathString) => {
+    if (!tree || !pathString) return null;
+    
+    const pathSegments = pathString.split('/').filter(segment => segment.length > 0);
+
+    if (pathSegments.length === 0) {
+        const rootIndex = tree.children?.find(
+            child => child.type === 'markdown' && child.title === 'index'
+        );
+        return rootIndex || null;
+    }
+    let currentNode = tree;
+
+    for (let i = 0; i < pathSegments.length; i++) {
+        const segment = pathSegments[i];
+
+        const childPath = currentNode.children?.find(
+            child => child.type === 'path' && child.name === segment
+        );
+        
+        if (!childPath) {
+            if (i === pathSegments.length - 1) {
+                const markdownNode = currentNode.children?.find(
+                    child => child.type === 'markdown' && child.title === segment
+                );
+                return markdownNode || null;
+            }
+            return null;
+        }
+        
+        currentNode = childPath;
+    }
+    
+
+    const indexMarkdown = currentNode.children?.find(
+        child => child.type === 'markdown' && child.title === 'index'
+    );
+    
+    return indexMarkdown || null;
+};
+
+export const getMarkdownIdByPath = (tree, pathString) => {
+    const markdownNode = findMarkdownByPath(tree, pathString);
+    return markdownNode?.id || null;
+};

src/utils/queries/markdown-queries.js

@@ -94,6 +94,24 @@ export const useMoveMarkdown = () => {
     });
 };
 
+export const useDeleteMarkdown = () => {
+    const queryClient = useQueryClient();
+    const config = useConfig();
+    
+    return useMutation({
+        mutationFn: (markdownId) => {
+            return fetch_(`${config.BACKEND_HOST}/api/markdown/${markdownId}`, {
+                method: "DELETE"
+            });
+        },
+        onSuccess: (data, markdownId) => {
+            queryClient.invalidateQueries({queryKey: ["markdown", markdownId]});
+            queryClient.invalidateQueries({queryKey: ["tree"]});
+            queryClient.invalidateQueries({queryKey: ["markdownsByPath"]});
+        }
+    });
+};
+
 export const useSearchMarkdown = (keyword) => {
     const config = useConfig();
     return useQuery({