添加标签功能

front/src/components/CreatePost.tsx

@@ -12,7 +12,8 @@ import {
   Text, 
   makeStyles, 
   shorthands, 
-  tokens 
+  tokens,
+  Input
 } from '@fluentui/react-components';
 import { 
   NumberSymbol24Regular, 
@@ -60,15 +61,90 @@ const useStyles = makeStyles({
   autoSaveText: {
     color: tokens.colorNeutralForeground4,
     fontSize: tokens.fontSizeBase200,
+  },
+  tagInputContainer: {
+    position: 'absolute',
+    bottom: '100%',
+    left: '0',
+    marginBottom: '8px',
+    display: 'flex',
+    gap: '8px',
+    backgroundColor: tokens.colorNeutralBackground1,
+    padding: '8px',
+    borderRadius: tokens.borderRadiusMedium,
+    boxShadow: tokens.shadow16,
+    zIndex: 10,
+  },
+  tagButtonWrapper: {
+    position: 'relative',
   }
 });
 
+// 自定义 remark 插件，用于高亮 #tag
+const remarkTagPlugin = () => {
+  return (tree: any) => {
+    const transformNode = (node: any, inLink = false) => {
+      if (node.type === 'link') inLink = true;
+
+      if (node.children) {
+        node.children = node.children.flatMap((child: any) => {
+          if (child.type === 'text' && !inLink) {
+            // Split by tag pattern (# followed by non-whitespace)
+            const parts = child.value.split(/(#\S+)/g);
+            return parts.map((part: string) => {
+              if (part.match(/^#\S+$/)) {
+                return {
+                  type: 'link',
+                  url: 'tag:' + part,
+                  children: [{ type: 'text', value: part }]
+                };
+              }
+              if (part === "") return [];
+              return { type: 'text', value: part };
+            }).flat();
+          }
+          return transformNode(child, inLink);
+        });
+      }
+      return node;
+    };
+    transformNode(tree);
+  };
+};
+
 const CreatePost: React.FC = () => {
   const styles = useStyles();
   const { isDarkMode } = useLayout();
   const [value, setValue] = useState<string | undefined>("");
   const [lastSaved, setLastSaved] = useState<string>("");
   
+  // 标签输入相关状态
+  const [showTagInput, setShowTagInput] = useState(false);
+  const [tagInputValue, setTagInputValue] = useState("");
+
+  const handleTagSubmit = () => {
+    if (!tagInputValue.trim()) {
+        setShowTagInput(false);
+        return;
+    }
+    
+    // 分割并处理标签
+    const tags = tagInputValue.trim().split(/\s+/).map(t => {
+       // 去除开头的 #（如果有多个也只去除第一个，或者确保开头有且仅有一个 #）
+       const cleanText = t.replace(/^#+/, '');
+       return '#' + cleanText;
+    }).join(' ');
+    
+    // 添加到编辑器内容
+    setValue(prev => {
+        const prefix = prev ? prev + ' ' : '';
+        return prefix + tags;
+    });
+    
+    setTagInputValue("");
+    setShowTagInput(false);
+  };
+
   useEffect(() => {
     // 模拟自动保存时间显示
     const now = new Date();
@@ -88,6 +164,17 @@ const CreatePost: React.FC = () => {
           }}
           commands={getCommands()}
           extraCommands={getExtraCommands()}
+          previewOptions={{
+            remarkPlugins: [remarkTagPlugin],
+            components: {
+              a: ({ node, ...props }) => {
+                if (props.href && props.href.startsWith('tag:')) {
+                   return <span style={{ color: tokens.colorBrandForeground1 }}>{props.children}</span>;
+                }
+                return <a {...props} />;
+              }
+            }
+          }}
         />
       </div>
 
@@ -99,12 +186,28 @@ const CreatePost: React.FC = () => {
           >
             提交
           </Button>
-          <Button 
-            appearance="subtle" 
-            icon={<NumberSymbol24Regular />}
-          >
-            添加标签
-          </Button>
+          <div className={styles.tagButtonWrapper}>
+            {showTagInput && (
+              <div className={styles.tagInputContainer}>
+                <Input 
+                  value={tagInputValue} 
+                  onChange={(e, data) => setTagInputValue(data.value)} 
+                  placeholder="输入标签..."
+                  onKeyDown={(e) => {
+                      if (e.key === 'Enter') handleTagSubmit();
+                  }}
+                />
+                <Button appearance="primary" size="small" onClick={handleTagSubmit}>OK</Button>
+              </div>
+            )}
+            <Button 
+              appearance="subtle" 
+              icon={<NumberSymbol24Regular />}
+              onClick={() => setShowTagInput(!showTagInput)}
+            >
+              添加标签
+            </Button>
+          </div>
         </div>
 
         <div className={styles.footerRight}>