T20: Add export/import UI to RibbonBar.tsx

frontend/src/components/RibbonBar.tsx

@@ -1,12 +1,21 @@
-import React, { useState } from 'react';
+import React, { useState, useRef, useCallback } from 'react';
+import type { YjsDocument } from '../crdt/YjsDocument';
+import { exportDrawing, type ExportFormat } from '../services/exportService';
+import { importDrawing, type ImportFormat, type ImportResult } from '../services/importService';
 import './RibbonBar.css';
 
 interface RibbonBarProps {
   onTabChange: (tab: string) => void;
+  yjsDoc?: React.RefObject<YjsDocument | null>;
 }
 
-const RibbonBar: React.FC<RibbonBarProps> = ({ onTabChange }) => {
+const RibbonBar: React.FC<RibbonBarProps> = ({ onTabChange, yjsDoc }) => {
   const [activeTab, setActiveTab] = useState('draw');
+  const [showExportMenu, setShowExportMenu] = useState(false);
+  const [showImportMenu, setShowImportMenu] = useState(false);
+  const [importStatus, setImportStatus] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const pendingImportFormat = useRef<ImportFormat>('json');
 
   const tabs = [
     { id: 'draw', label: 'Draw', icon: '✏️' },
@@ -21,6 +30,57 @@ const RibbonBar: React.FC<RibbonBarProps> = ({ onTabChange }) => {
     onTabChange(tabId);
   };
 
+  const handleExport = useCallback(async (format: ExportFormat) => {
+    setShowExportMenu(false);
+    const doc = yjsDoc?.current;
+    if (!doc) {
+      setImportStatus('Error: No document available');
+      setTimeout(() => setImportStatus(null), 3000);
+      return;
+    }
+    try {
+      await exportDrawing(doc, format);
+    } catch (e) {
+      setImportStatus(`Export error: ${(e as Error).message}`);
+      setTimeout(() => setImportStatus(null), 5000);
+    }
+  }, [yjsDoc]);
+
+  const triggerImport = useCallback((format: ImportFormat) => {
+    setShowImportMenu(false);
+    pendingImportFormat.current = format;
+    if (fileInputRef.current) {
+      fileInputRef.current.accept = format === 'json' ? '.json,application/json' : '.dxf,application/dxf';
+      fileInputRef.current.click();
+    }
+  }, []);
+
+  const handleFileSelected = useCallback(async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    const doc = yjsDoc?.current;
+    if (!doc) {
+      setImportStatus('Error: No document available');
+      setTimeout(() => setImportStatus(null), 3000);
+      return;
+    }
+    try {
+      const result: ImportResult = await importDrawing(file, pendingImportFormat.current, doc);
+      if (result.success) {
+        setImportStatus(`Imported: ${result.elementsImported} elements, ${result.layersImported} layers`);
+      } else {
+        setImportStatus(`Import failed: ${result.errors.join(', ')}`);
+      }
+    } catch (err) {
+      setImportStatus(`Import error: ${(err as Error).message}`);
+    }
+    setTimeout(() => setImportStatus(null), 5000);
+    // Reset input so same file can be selected again
+    if (fileInputRef.current) {
+      fileInputRef.current.value = '';
+    }
+  }, [yjsDoc]);
+
   return (
     <div className="ribbon-bar" role="menubar" aria-label="CAD Functions">
       {tabs.map((tab) => (
@@ -35,6 +95,74 @@ const RibbonBar: React.FC<RibbonBarProps> = ({ onTabChange }) => {
           <span className="tab-label">{tab.label}</span>
         </button>
       ))}
+
+      {/* Export/Import section */}
+      <div className="ribbon-divider" aria-hidden="true" />
+
+      <div className="ribbon-dropdown-wrapper">
+        <button
+          className="ribbon-tab"
+          onClick={() => setShowExportMenu(!showExportMenu)}
+          aria-haspopup="menu"
+          aria-expanded={showExportMenu}
+          role="menuitem"
+        >
+          <span className="tab-icon" aria-hidden="true">📤</span>
+          <span className="tab-label">Export</span>
+        </button>
+        {showExportMenu && (
+          <div className="ribbon-dropdown" role="menu">
+            <button className="ribbon-dropdown-item" onClick={() => handleExport('json')} role="menuitem">
+              JSON
+            </button>
+            <button className="ribbon-dropdown-item" onClick={() => handleExport('svg')} role="menuitem">
+              SVG
+            </button>
+            <button className="ribbon-dropdown-item" onClick={() => handleExport('dxf')} role="menuitem">
+              DXF
+            </button>
+            <button className="ribbon-dropdown-item" onClick={() => handleExport('pdf')} role="menuitem">
+              PDF
+            </button>
+          </div>
+        )}
+      </div>
+
+      <div className="ribbon-dropdown-wrapper">
+        <button
+          className="ribbon-tab"
+          onClick={() => setShowImportMenu(!showImportMenu)}
+          aria-haspopup="menu"
+          aria-expanded={showImportMenu}
+          role="menuitem"
+        >
+          <span className="tab-icon" aria-hidden="true">📥</span>
+          <span className="tab-label">Import</span>
+        </button>
+        {showImportMenu && (
+          <div className="ribbon-dropdown" role="menu">
+            <button className="ribbon-dropdown-item" onClick={() => triggerImport('json')} role="menuitem">
+              JSON
+            </button>
+            <button className="ribbon-dropdown-item" onClick={() => triggerImport('dxf')} role="menuitem">
+              DXF
+            </button>
+          </div>
+        )}
+      </div>
+
+      {importStatus && (
+        <span className="ribbon-status" role="status" aria-live="polite">
+          {importStatus}
+        </span>
+      )}
+
+      <input
+        ref={fileInputRef}
+        type="file"
+        style={{ display: 'none' }}
+        onChange={handleFileSelected}
+      />
     </div>
   );
 };