Add FolderTree UI

rsconcept/frontend/src/components/Icons.tsx

@@ -31,7 +31,10 @@ export { RiMenuFoldFill   as IconMenuFold }       from 'react-icons/ri';
 export { RiMenuUnfoldFill as IconMenuUnfold }     from 'react-icons/ri';
 export { LuMoon           as IconDarkTheme }      from 'react-icons/lu';
 export { LuSun            as IconLightTheme }     from 'react-icons/lu';
-export { FaRegFolder      as IconFolder }         from 'react-icons/fa';
+export { LuFolderTree     as IconFolderTree }     from 'react-icons/lu';
+export { FaRegFolder      as IconFolder }         from 'react-icons/fa6';
+export { FaRegFolderOpen  as IconFolderOpened }   from 'react-icons/fa6';
+export { FaRegFolderClosed as IconFolderClosed }  from 'react-icons/fa6';
 export { LuLightbulb      as IconHelp }           from 'react-icons/lu';
 export { LuLightbulbOff   as IconHelpOff }        from 'react-icons/lu';
 export { RiPushpinFill    as IconPin }            from 'react-icons/ri';

rsconcept/frontend/src/components/select/PickSchema.tsx

@@ -5,7 +5,7 @@ import DataTable, { createColumnHelper, IConditionalStyle } from '@/components/u
 import SearchBar from '@/components/ui/SearchBar';
 import { useLibrary } from '@/context/LibraryContext';
 import { useConceptOptions } from '@/context/OptionsContext';
-import { ILibraryItem, LibraryItemID } from '@/models/library';
+import { ILibraryItem, LibraryItemID, LibraryItemType } from '@/models/library';
 import { ILibraryFilter } from '@/models/miscellaneous';
 
 import FlexColumn from '../ui/FlexColumn';
@@ -32,7 +32,8 @@ function PickSchema({ id, initialFilter = '', rows = 4, value, onSelectValue }:
 
   useLayoutEffect(() => {
     setFilter({
-      query: filterText
+      query: filterText,
+      type: LibraryItemType.RSFORM
     });
   }, [filterText]);
 

rsconcept/frontend/src/context/LibraryContext.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { createContext, useCallback, useContext, useEffect, useState } from 'react';
+import { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react';
 
 import {
   DataCallback,
@@ -14,7 +14,8 @@ import {
   postRSFormFromFile
 } from '@/app/backendAPI';
 import { ErrorData } from '@/components/info/InfoError';
-import { ILibraryItem, LibraryItemID } from '@/models/library';
+import { FolderTree } from '@/models/FolderTree';
+import { ILibraryItem, LibraryItemID, LocationHead } from '@/models/library';
 import { ILibraryCreateData } from '@/models/library';
 import { matchLibraryItem, matchLibraryItemLocation } from '@/models/libraryAPI';
 import { ILibraryFilter } from '@/models/miscellaneous';
@@ -28,10 +29,17 @@ import { useConceptOptions } from './OptionsContext';
 interface ILibraryContext {
   items: ILibraryItem[];
   templates: ILibraryItem[];
+  folders: FolderTree;
+
   loading: boolean;
+  loadingError: ErrorData;
+  setLoadingError: (error: ErrorData) => void;
+
   processing: boolean;
-  error: ErrorData;
+  processingError: ErrorData;
-  setError: (error: ErrorData) => void;
+  setProcessingError: (error: ErrorData) => void;
+
+  reloadItems: (callback?: () => void) => void;
 
   applyFilter: (params: ILibraryFilter) => ILibraryItem[];
   retrieveTemplate: (templateID: LibraryItemID, callback: (schema: IRSForm) => void) => void;
@@ -64,15 +72,31 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
   const [templates, setTemplates] = useState<ILibraryItem[]>([]);
   const [loading, setLoading] = useState(false);
   const [processing, setProcessing] = useState(false);
-  const [error, setError] = useState<ErrorData>(undefined);
+  const [loadingError, setLoadingError] = useState<ErrorData>(undefined);
+  const [processingError, setProcessingError] = useState<ErrorData>(undefined);
   const [cachedTemplates, setCachedTemplates] = useState<IRSForm[]>([]);
 
+  const folders = useMemo(() => {
+    const result = new FolderTree(items.map(item => item.location));
+    result.addPath(LocationHead.USER, 0);
+    result.addPath(LocationHead.COMMON, 0);
+    result.addPath(LocationHead.LIBRARY, 0);
+    result.addPath(LocationHead.PROJECTS, 0);
+    return result;
+  }, [items]);
+
   const applyFilter = useCallback(
     (filter: ILibraryFilter) => {
       let result = items;
-      if (filter.head) {
+      if (!filter.folderMode && filter.head) {
         result = result.filter(item => item.location.startsWith(filter.head!));
       }
+      if (filter.folderMode && filter.folder) {
+        result = result.filter(item => item.location == filter.folder);
+      }
+      if (filter.type) {
+        result = result.filter(item => item.item_type === filter.type);
+      }
       if (filter.isVisible !== undefined) {
         result = result.filter(item => filter.isVisible === item.visible);
       }
@@ -85,12 +109,12 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
       if (filter.isEditor !== undefined) {
         result = result.filter(item => filter.isEditor == user?.editor.includes(item.id));
       }
+      if (!filter.folderMode && filter.path) {
+        result = result.filter(item => matchLibraryItemLocation(item, filter.path!));
+      }
       if (filter.query) {
         result = result.filter(item => matchLibraryItem(item, filter.query!));
       }
-      if (filter.path) {
-        result = result.filter(item => matchLibraryItemLocation(item, filter.path!));
-      }
       return result;
     },
     [items, user]
@@ -103,11 +127,11 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
         callback(cached);
         return;
       }
-      setError(undefined);
+      setProcessingError(undefined);
       getRSFormDetails(String(templateID), '', {
         showError: true,
         setLoading: setProcessing,
-        onError: setError,
+        onError: setProcessingError,
         onSuccess: data => {
           const schema = new RSFormLoader(data).produceRSForm();
           setCachedTemplates(prev => [...prev, schema]);
@@ -121,12 +145,12 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
   const reloadItems = useCallback(
     (callback?: () => void) => {
       setItems([]);
-      setError(undefined);
+      setLoadingError(undefined);
       if (user?.is_staff && adminMode) {
         getAdminLibrary({
           setLoading: setLoading,
           showError: true,
-          onError: setError,
+          onError: setLoadingError,
           onSuccess: newData => {
             setItems(newData);
             if (callback) callback();
@@ -136,7 +160,7 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
         getLibrary({
           setLoading: setLoading,
           showError: true,
-          onError: setError,
+          onError: setLoadingError,
           onSuccess: newData => {
             setItems(newData);
             if (callback) callback();
@@ -150,6 +174,8 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
   const reloadTemplates = useCallback(() => {
     setTemplates([]);
     getTemplates({
+      setLoading: setLoading,
+      onError: setLoadingError,
       showError: true,
       onSuccess: newData => setTemplates(newData)
     });
@@ -190,13 +216,13 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
           }
           if (callback) callback(newSchema);
         });
-      setError(undefined);
+      setProcessingError(undefined);
       if (data.file) {
         postRSFormFromFile({
           data: data,
           showError: true,
           setLoading: setProcessing,
-          onError: setError,
+          onError: setProcessingError,
           onSuccess: onSuccess
         });
       } else {
@@ -204,7 +230,7 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
           data: data,
           showError: true,
           setLoading: setProcessing,
-          onError: setError,
+          onError: setProcessingError,
           onSuccess: onSuccess
         });
       }
@@ -214,11 +240,11 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
 
   const destroyItem = useCallback(
     (target: LibraryItemID, callback?: () => void) => {
-      setError(undefined);
+      setProcessingError(undefined);
       deleteLibraryItem(String(target), {
         showError: true,
         setLoading: setProcessing,
-        onError: setError,
+        onError: setProcessingError,
         onSuccess: () =>
           reloadItems(() => {
             if (user && user.subscriptions.includes(target)) {
@@ -231,7 +257,7 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
           })
       });
     },
-    [setError, reloadItems, user]
+    [reloadItems, user]
   );
 
   const cloneItem = useCallback(
@@ -239,12 +265,12 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
       if (!user) {
         return;
       }
-      setError(undefined);
+      setProcessingError(undefined);
       postCloneLibraryItem(String(target), {
         data: data,
         showError: true,
         setLoading: setProcessing,
-        onError: setError,
+        onError: setProcessingError,
         onSuccess: newSchema =>
           reloadItems(() => {
             if (user && !user.subscriptions.includes(newSchema.id)) {
@@ -254,18 +280,26 @@ export const LibraryState = ({ children }: LibraryStateProps) => {
           })
       });
     },
-    [reloadItems, setError, user]
+    [reloadItems, user]
   );
 
   return (
     <LibraryContext.Provider
       value={{
         items,
+        folders,
         templates,
+
         loading,
+        loadingError,
+        setLoadingError,
+
         processing,
-        error,
+        processingError,
-        setError,
+        setProcessingError,
+
+        reloadItems,
+
         applyFilter,
         createItem,
         cloneItem,

rsconcept/frontend/src/context/RSFormContext.tsx

@@ -296,8 +296,7 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
         onError: setProcessingError,
         onSuccess: () => {
           schema.location = newLocation;
-          library.localUpdateItem(schema);
+          library.reloadItems(callback);
-          if (callback) callback();
         }
       });
     },

rsconcept/frontend/src/models/FolderTree.test.ts

@@ -0,0 +1,47 @@
+import { FolderTree } from './FolderTree';
+
+// TODO: test FolderNode and FolderTree exhaustively
+
+describe('Testing Tree construction', () => {
+  test('empty Tree should be empty', () => {
+    const tree = new FolderTree();
+    expect(tree.roots.size).toBe(0);
+  });
+
+  test('constructing from paths', () => {
+    const tree = new FolderTree(['/S', '/S/project1/123', '/U']);
+    expect(tree.roots.size).toBe(2);
+    expect(tree.roots.get('S')?.children.size).toBe(1);
+  });
+});
+
+describe('Testing Tree editing', () => {
+  test('add invalid path', () => {
+    const tree = new FolderTree();
+    expect(() => tree.addPath('invalid')).toThrow(Error);
+  });
+
+  test('add valid path', () => {
+    const tree = new FolderTree();
+    const node = tree.addPath('/S/test');
+    expect(node.getPath()).toBe('/S/test');
+    expect(node.filesInside).toBe(1);
+    expect(node.filesTotal).toBe(1);
+
+    expect(node.parent?.getPath()).toBe('/S');
+    expect(node.parent?.filesInside).toBe(0);
+    expect(node.parent?.filesTotal).toBe(1);
+  });
+
+  test('incrementing counter', () => {
+    const tree = new FolderTree();
+    const node1 = tree.addPath('/S/test', 0);
+    expect(node1.filesInside).toBe(0);
+    expect(node1.filesTotal).toBe(0);
+
+    const node2 = tree.addPath('/S/test', 2);
+    expect(node1).toBe(node2);
+    expect(node2.filesInside).toBe(2);
+    expect(node2.filesTotal).toBe(2);
+  });
+});

rsconcept/frontend/src/models/FolderTree.ts

@@ -0,0 +1,157 @@
+/**
+ * Module: Folder tree data structure. Does not support deletions.
+ */
+
+/**
+ * Represents single node of a {@link FolderTree}.
+ */
+export class FolderNode {
+  rank: number = 0;
+  text: string;
+  children: Map<string, FolderNode>;
+  parent: FolderNode | undefined;
+
+  filesInside: number = 0;
+  filesTotal: number = 0;
+
+  constructor(text: string, parent?: FolderNode) {
+    this.text = text;
+    this.parent = parent;
+    this.children = new Map();
+    if (parent) {
+      this.rank = parent.rank + 1;
+    }
+  }
+
+  addChild(text: string): FolderNode {
+    const node = new FolderNode(text, this);
+    this.children.set(text, node);
+    return node;
+  }
+
+  hasPredecessor(target: FolderNode): boolean {
+    if (this.parent === target) {
+      return true;
+    } else if (!this.parent) {
+      return false;
+    }
+    let node = this.parent;
+    while (node.parent) {
+      if (node.parent === target) {
+        return true;
+      }
+      node = node.parent;
+    }
+    return false;
+  }
+
+  incrementFiles(count: number = 1): void {
+    this.filesInside = this.filesInside + count;
+    this.incrementTotal(count);
+  }
+
+  incrementTotal(count: number = 1): void {
+    this.filesTotal = this.filesTotal + count;
+    if (this.parent) {
+      this.parent.incrementTotal(count);
+    }
+  }
+
+  getPath(): string {
+    const suffix = this.text ? `/${this.text}` : '';
+    if (!this.parent) {
+      return suffix;
+    } else {
+      return this.parent.getPath() + suffix;
+    }
+  }
+}
+
+/**
+ * Represents a FolderTree.
+ *
+ */
+export class FolderTree {
+  roots: Map<string, FolderNode> = new Map();
+
+  constructor(arr?: string[]) {
+    arr?.forEach(path => this.addPath(path));
+  }
+
+  at(path: string): FolderNode | undefined {
+    let parse = ChopPathHead(path);
+    if (!this.roots.has(parse.head)) {
+      return undefined;
+    }
+    let node = this.roots.get(parse.head)!;
+    while (parse.tail !== '') {
+      parse = ChopPathHead(parse.tail);
+      if (!node.children.has(parse.head)) {
+        return undefined;
+      }
+      node = node.children.get(parse.head)!;
+    }
+    return node;
+  }
+
+  getTree(): FolderNode[] {
+    const result: FolderNode[] = [];
+    this.roots.forEach(root => this.visitNode(root, result));
+    return result;
+  }
+
+  private visitNode(target: FolderNode, result: FolderNode[]) {
+    result.push(target);
+    target.children.forEach(child => this.visitNode(child, result));
+  }
+
+  addPath(path: string, filesCount: number = 1): FolderNode {
+    let parse = ChopPathHead(path);
+    if (!parse.head) {
+      throw Error(`Invalid path ${path}`);
+    }
+    let node = this.roots.has(parse.head) ? this.roots.get(parse.head)! : this.addNode(parse.head);
+    while (parse.tail !== '') {
+      parse = ChopPathHead(parse.tail);
+      if (node.children.has(parse.head)) {
+        node = node.children.get(parse.head)!;
+      } else {
+        node = this.addNode(parse.head, node);
+      }
+    }
+    node.incrementFiles(filesCount);
+    return node;
+  }
+
+  private addNode(text: string, parent?: FolderNode): FolderNode {
+    if (parent === undefined) {
+      const newNode = new FolderNode(text);
+      this.roots.set(text, newNode);
+      return newNode;
+    } else {
+      return parent.addChild(text);
+    }
+  }
+}
+
+// ========= Internals =======
+function ChopPathHead(path: string) {
+  if (!path || path.at(0) !== '/') {
+    return {
+      head: '',
+      tail: ''
+    };
+  }
+  const slash = path.indexOf('/', 1);
+  if (slash === -1) {
+    return {
+      head: path.substring(1),
+      tail: ''
+    };
+  } else {
+    return {
+      head: path.substring(1, slash),
+      tail: path.substring(slash)
+    };
+  }
+}

rsconcept/frontend/src/models/library.ts

@@ -26,9 +26,9 @@ export enum AccessPolicy {
  */
 export enum LocationHead {
   USER = '/U',
-  LIBRARY = '/L',
   COMMON = '/S',
-  PROJECTS = '/P'
+  PROJECTS = '/P',
+  LIBRARY = '/L'
 }
 
 /**

rsconcept/frontend/src/models/miscellaneous.ts

@@ -2,7 +2,7 @@
  * Module: Miscellaneous frontend model types. Future targets for refactoring aimed at extracting modules.
  */
 
-import { LocationHead } from './library';
+import { LibraryItemType, LocationHead } from './library';
 
 /**
  * Represents graph dependency mode.
@@ -141,10 +141,15 @@ export enum CstMatchMode {
  * Represents Library filter parameters.
  */
 export interface ILibraryFilter {
+  type?: LibraryItemType;
   query?: string;
+
   path?: string;
   head?: LocationHead;
 
+  folderMode?: boolean;
+  folder?: string;
+
   isVisible?: boolean;
   isOwned?: boolean;
   isSubscribed?: boolean;

rsconcept/frontend/src/pages/CreateItemPage/FormCreateItem.tsx

@@ -30,7 +30,7 @@ import { information } from '@/utils/labels';
 function FormCreateItem() {
   const router = useConceptNavigation();
   const { user } = useAuth();
-  const { createItem, error, setError, processing } = useLibrary();
+  const { createItem, processingError, setProcessingError, processing } = useLibrary();
 
   const [itemType, setItemType] = useState(LibraryItemType.RSFORM);
   const [title, setTitle] = useState('');
@@ -50,8 +50,8 @@ function FormCreateItem() {
   const inputRef = useRef<HTMLInputElement | null>(null);
 
   useEffect(() => {
-    setError(undefined);
+    setProcessingError(undefined);
-  }, [title, alias, setError]);
+  }, [title, alias, setProcessingError]);
 
   function handleCancel() {
     if (router.canBack()) {
@@ -194,7 +194,7 @@ function FormCreateItem() {
         <SubmitButton text='Создать схему' loading={processing} className='min-w-[10rem]' disabled={!isValid} />
         <Button text='Отмена' className='min-w-[10rem]' onClick={() => handleCancel()} />
       </div>
-      {error ? <InfoError error={error} /> : null}
+      {processingError ? <InfoError error={processingError} /> : null}
     </form>
   );
 }

rsconcept/frontend/src/pages/LibraryPage/LibraryFolders.tsx

@@ -0,0 +1,139 @@
+'use client';
+
+import clsx from 'clsx';
+import { AnimatePresence, motion } from 'framer-motion';
+import { useCallback, useLayoutEffect, useMemo, useState } from 'react';
+
+import { IconFolder, IconFolderClosed, IconFolderOpened, IconFolderTree } from '@/components/Icons';
+import { CProps } from '@/components/props';
+import MiniButton from '@/components/ui/MiniButton';
+import { FolderNode, FolderTree } from '@/models/FolderTree';
+import { animateSideAppear, animateSideView } from '@/styling/animations';
+import { globals, prefixes } from '@/utils/constants';
+import { describeFolderNode, labelFolderNode } from '@/utils/labels';
+
+interface LibraryTableProps {
+  folders: FolderTree;
+  currentFolder: string;
+  setFolder: React.Dispatch<React.SetStateAction<string>>;
+  toggleFolderMode: () => void;
+}
+
+function LibraryFolders({ folders, currentFolder, setFolder, toggleFolderMode }: LibraryTableProps) {
+  const activeNode = useMemo(() => folders.at(currentFolder), [folders, currentFolder]);
+
+  const items = useMemo(() => folders.getTree(), [folders]);
+  const [folded, setFolded] = useState<FolderNode[]>([]);
+
+  useLayoutEffect(() => {
+    setFolded(items.filter(item => item !== activeNode && (!activeNode || !activeNode.hasPredecessor(item))));
+  }, [items, activeNode]);
+
+  const onFoldItem = useCallback(
+    (target: FolderNode, showChildren: boolean) => {
+      setFolded(prev =>
+        items.filter(item => {
+          if (item === target) {
+            return !showChildren;
+          }
+          if (!showChildren && item.hasPredecessor(target)) {
+            return true;
+          } else {
+            return prev.includes(item);
+          }
+        })
+      );
+    },
+    [items]
+  );
+
+  const handleSetValue = useCallback(
+    (event: CProps.EventMouse, target: FolderNode) => {
+      event.preventDefault();
+      event.stopPropagation();
+      setFolder(target.getPath());
+    },
+    [setFolder]
+  );
+
+  const handleClickFold = useCallback(
+    (event: CProps.EventMouse, target: FolderNode, showChildren: boolean) => {
+      event.preventDefault();
+      event.stopPropagation();
+      onFoldItem(target, showChildren);
+    },
+    [onFoldItem]
+  );
+
+  return (
+    <motion.div
+      className='flex flex-col text:xs sm:text-sm'
+      initial={{ ...animateSideView.initial }}
+      animate={{ ...animateSideView.animate }}
+      exit={{ ...animateSideView.exit }}
+    >
+      <div className='h-[2.08rem] flex justify-end pr-1'>
+        <MiniButton
+          icon={<IconFolderTree size='1.25rem' className='icon-green' />}
+          title='Режим: проводник'
+          onClick={toggleFolderMode}
+        />
+      </div>
+      <div
+        className={clsx(
+          'max-w-[10rem] sm:max-w-[15rem] min-w-[10rem] sm:min-w-[15rem]',
+          'flex flex-col',
+          'cc-scroll-y'
+        )}
+      >
+        <AnimatePresence initial={false}>
+          {items.map((item, index) =>
+            !item.parent || !folded.includes(item.parent) ? (
+              <motion.div
+                tabIndex={-1}
+                key={`${prefixes.folders_list}${index}`}
+                className={clsx(
+                  'min-h-[2.0825rem] sm:min-h-[2.3125rem]',
+                  'pr-3 flex items-center gap-2',
+                  'cc-scroll-row',
+                  'clr-hover',
+                  'cursor-pointer',
+                  activeNode === item && 'clr-selected'
+                )}
+                style={{ paddingLeft: `${(item.rank > 5 ? 5 : item.rank) * 0.5 + 0.5}rem` }}
+                data-tooltip-id={globals.tooltip}
+                data-tooltip-html={describeFolderNode(item)}
+                onClick={event => handleSetValue(event, item)}
+                initial={{ ...animateSideAppear.initial }}
+                animate={{ ...animateSideAppear.animate }}
+                exit={{ ...animateSideAppear.exit }}
+              >
+                {item.children.size > 0 ? (
+                  <MiniButton
+                    noPadding
+                    noHover
+                    icon={
+                      folded.includes(item) ? (
+                        <IconFolderClosed size='1rem' className='icon-primary' />
+                      ) : (
+                        <IconFolderOpened size='1rem' className='icon-green' />
+                      )
+                    }
+                    onClick={event => handleClickFold(event, item, folded.includes(item))}
+                  />
+                ) : (
+                  <div>
+                    <IconFolder size='1rem' />
+                  </div>
+                )}
+                <div className='self-center'>{labelFolderNode(item)}</div>
+              </motion.div>
+            ) : null
+          )}
+        </AnimatePresence>
+      </div>
+    </motion.div>
+  );
+}
+
+export default LibraryFolders;

rsconcept/frontend/src/pages/LibraryPage/LibraryPage.tsx

@@ -1,5 +1,6 @@
 'use client';
 
+import { AnimatePresence } from 'framer-motion';
 import { useCallback, useLayoutEffect, useMemo, useState } from 'react';
 
 import DataLoader from '@/components/wrap/DataLoader';
@@ -11,6 +12,7 @@ import { ILibraryFilter } from '@/models/miscellaneous';
 import { storage } from '@/utils/constants';
 import { toggleTristateFlag } from '@/utils/utils';
 
+import LibraryFolders from './LibraryFolders';
 import LibraryTable from './LibraryTable';
 import SearchPanel from './SearchPanel';
 
@@ -23,6 +25,8 @@ function LibraryPage() {
   const [path, setPath] = useState('');
 
   const [head, setHead] = useLocalStorage<LocationHead | undefined>(storage.librarySearchHead, undefined);
+  const [folderMode, setFolderMode] = useLocalStorage<boolean>(storage.librarySearchFolderMode, true);
+  const [folder, setFolder] = useLocalStorage<string>(storage.librarySearchFolder, '');
   const [isVisible, setIsVisible] = useLocalStorage<boolean | undefined>(storage.librarySearchVisible, true);
   const [isSubscribed, setIsSubscribed] = useLocalStorage<boolean | undefined>(
     storage.librarySearchSubscribed,
@@ -39,9 +43,11 @@ function LibraryPage() {
       isEditor: user ? isEditor : undefined,
       isOwned: user ? isOwned : undefined,
       isSubscribed: user ? isSubscribed : undefined,
-      isVisible: user ? isVisible : true
+      isVisible: user ? isVisible : true,
+      folderMode: folderMode,
+      folder: folder
     }),
-    [head, path, query, isEditor, isOwned, isSubscribed, isVisible, user]
+    [head, path, query, isEditor, isOwned, isSubscribed, isVisible, user, folderMode, folder]
   );
 
   const hasCustomFilter = useMemo(
@@ -52,7 +58,8 @@ function LibraryPage() {
       filter.isEditor !== undefined ||
       filter.isOwned !== undefined ||
       filter.isSubscribed !== undefined ||
-      filter.isVisible !== true,
+      filter.isVisible !== true ||
+      !!filter.folder,
     [filter]
   );
 
@@ -64,6 +71,7 @@ function LibraryPage() {
   const toggleOwned = useCallback(() => setIsOwned(prev => toggleTristateFlag(prev)), [setIsOwned]);
   const toggleSubscribed = useCallback(() => setIsSubscribed(prev => toggleTristateFlag(prev)), [setIsSubscribed]);
   const toggleEditor = useCallback(() => setIsEditor(prev => toggleTristateFlag(prev)), [setIsEditor]);
+  const toggleFolderMode = useCallback(() => setFolderMode(prev => !prev), [setFolderMode]);
 
   const resetFilter = useCallback(() => {
     setQuery('');
@@ -73,23 +81,26 @@ function LibraryPage() {
     setIsSubscribed(undefined);
     setIsOwned(undefined);
     setIsEditor(undefined);
-  }, [setHead, setIsVisible, setIsSubscribed, setIsOwned, setIsEditor]);
+    setFolder('');
+  }, [setHead, setIsVisible, setIsSubscribed, setIsOwned, setIsEditor, setFolder]);
 
   const view = useMemo(
     () => (
       <LibraryTable
         resetQuery={resetFilter} // prettier: split lines
         items={items}
+        folderMode={folderMode}
+        toggleFolderMode={toggleFolderMode}
       />
     ),
-    [resetFilter, items]
+    [resetFilter, items, folderMode, toggleFolderMode]
   );
 
   return (
     <DataLoader
       id='library-page' // prettier: split lines
       isLoading={library.loading}
-      error={library.error}
+      error={library.loadingError}
       hasNoData={library.items.length === 0}
     >
       <SearchPanel
@@ -111,8 +122,23 @@ function LibraryPage() {
         isEditor={isEditor}
         toggleEditor={toggleEditor}
         resetFilter={resetFilter}
+        folderMode={folderMode}
+        toggleFolderMode={toggleFolderMode}
       />
+
+      <div className='flex'>
+        <AnimatePresence>
+          {folderMode ? (
+            <LibraryFolders
+              currentFolder={folder} // prettier: split-lines
+              setFolder={setFolder}
+              folders={library.folders}
+              toggleFolderMode={toggleFolderMode}
+            />
+          ) : null}
+        </AnimatePresence>
         {view}
+      </div>
     </DataLoader>
   );
 }

rsconcept/frontend/src/pages/LibraryPage/LibraryTable.tsx

@@ -1,6 +1,7 @@
 'use client';
 
-import { useLayoutEffect, useMemo, useState } from 'react';
+import clsx from 'clsx';
+import { useCallback, useLayoutEffect, useMemo, useState } from 'react';
 import { useIntl } from 'react-intl';
 
 import { urls } from '@/app/urls';
@@ -9,6 +10,7 @@ import BadgeLocation from '@/components/info/BadgeLocation';
 import { CProps } from '@/components/props';
 import DataTable, { createColumnHelper, IConditionalStyle, VisibilityState } from '@/components/ui/DataTable';
 import FlexColumn from '@/components/ui/FlexColumn';
+import MiniButton from '@/components/ui/MiniButton';
 import TextURL from '@/components/ui/TextURL';
 import { useConceptNavigation } from '@/context/NavigationContext';
 import { useConceptOptions } from '@/context/OptionsContext';
@@ -21,11 +23,13 @@ import { storage } from '@/utils/constants';
 interface LibraryTableProps {
   items: ILibraryItem[];
   resetQuery: () => void;
+  folderMode: boolean;
+  toggleFolderMode: () => void;
 }
 
 const columnHelper = createColumnHelper<ILibraryItem>();
 
-function LibraryTable({ items, resetQuery }: LibraryTableProps) {
+function LibraryTable({ items, resetQuery, folderMode, toggleFolderMode }: LibraryTableProps) {
   const router = useConceptNavigation();
   const intl = useIntl();
   const { getUserLabel } = useUsers();
@@ -50,14 +54,33 @@ function LibraryTable({ items, resetQuery }: LibraryTableProps) {
     });
   }, [windowSize]);
 
+  const handleToggleFolder = useCallback(
+    (event: CProps.EventMouse) => {
+      if (event.ctrlKey) {
+        event.preventDefault();
+        event.stopPropagation();
+        toggleFolderMode();
+      }
+    },
+    [toggleFolderMode]
+  );
+
   const columns = useMemo(
     () => [
+      ...(folderMode
+        ? []
+        : [
             columnHelper.accessor('location', {
               id: 'location',
               header: () => (
-          <div className='pl-2 max-h-[1rem] translate-y-[-0.125rem]'>
+                <MiniButton
-            <IconFolder size='1.25rem' className='clr-text-controls' />
+                  noHover
-          </div>
+                  noPadding
+                  className='pl-2 max-h-[1rem] translate-y-[-0.125rem]'
+                  onClick={handleToggleFolder}
+                  titleHtml='Ctrl + клик для переключения </br>в режим папок'
+                  icon={<IconFolder size='1.25rem' className='clr-text-controls' />}
+                />
               ),
               size: 50,
               minSize: 50,
@@ -65,7 +88,8 @@ function LibraryTable({ items, resetQuery }: LibraryTableProps) {
               enableSorting: true,
               cell: props => <BadgeLocation location={props.getValue()} />,
               sortingFn: 'text'
-      }),
+            })
+          ]),
       columnHelper.accessor('alias', {
         id: 'alias',
         header: 'Шифр',
@@ -116,7 +140,7 @@ function LibraryTable({ items, resetQuery }: LibraryTableProps) {
         sortDescFirst: true
       })
     ],
-    [intl, getUserLabel, windowSize]
+    [intl, getUserLabel, windowSize, handleToggleFolder, folderMode]
   );
 
   const tableHeight = useMemo(() => calculateHeight('2.2rem'), [calculateHeight]);
@@ -139,7 +163,7 @@ function LibraryTable({ items, resetQuery }: LibraryTableProps) {
       columns={columns}
       data={items}
       headPosition='0'
-      className='text-xs sm:text-sm cc-scroll-y'
+      className={clsx('text-xs sm:text-sm cc-scroll-y', { 'border-l border-b': folderMode })}
       style={{ maxHeight: tableHeight }}
       noDataComponent={
         <FlexColumn className='p-3 items-center min-h-[6rem]'>

rsconcept/frontend/src/pages/LibraryPage/SearchPanel.tsx

@@ -4,8 +4,9 @@ import clsx from 'clsx';
 import { useCallback } from 'react';
 
 import { LocationIcon, SubscribeIcon, VisibilityIcon } from '@/components/DomainIcons';
-import { IconEditor, IconFilterReset, IconFolder, IconOwner } from '@/components/Icons';
+import { IconEditor, IconFilterReset, IconFolder, IconFolderTree, IconOwner } from '@/components/Icons';
 import BadgeHelp from '@/components/info/BadgeHelp';
+import { CProps } from '@/components/props';
 import Dropdown from '@/components/ui/Dropdown';
 import DropdownButton from '@/components/ui/DropdownButton';
 import MiniButton from '@/components/ui/MiniButton';
@@ -32,6 +33,9 @@ interface SearchPanelProps {
   head: LocationHead | undefined;
   setHead: React.Dispatch<React.SetStateAction<LocationHead | undefined>>;
 
+  folderMode: boolean;
+  toggleFolderMode: () => void;
+
   isVisible: boolean | undefined;
   toggleVisible: () => void;
   isOwned: boolean | undefined;
@@ -55,6 +59,9 @@ function SearchPanel({
   head,
   setHead,
 
+  folderMode,
+  toggleFolderMode,
+
   isVisible,
   toggleVisible,
   isOwned,
@@ -76,6 +83,22 @@ function SearchPanel({
     [headMenu, setHead]
   );
 
+  const handleToggleFolder = useCallback(() => {
+    headMenu.hide();
+    toggleFolderMode();
+  }, [headMenu, toggleFolderMode]);
+
+  const handleFolderClick = useCallback(
+    (event: CProps.EventMouse) => {
+      if (event.ctrlKey) {
+        toggleFolderMode();
+      } else {
+        headMenu.toggle();
+      }
+    },
+    [headMenu, toggleFolderMode]
+  );
+
   return (
     <div
       className={clsx(
@@ -134,12 +157,12 @@ function SearchPanel({
           value={query}
           onChange={setQuery}
         />
-
+        {!folderMode ? (
           <div ref={headMenu.ref} className='flex items-center h-full py-1 select-none'>
             <SelectorButton
               transparent
               className='h-full rounded-lg'
-            title={head ? describeLocationHead(head) : 'Выберите каталог'}
+              titleHtml={(head ? describeLocationHead(head) : 'Выберите каталог') + '<br/>Ctrl + клик - Проводник'}
               hideTitle={headMenu.isOpen}
               icon={
                 head ? (
@@ -148,7 +171,7 @@ function SearchPanel({
                   <IconFolder size='1.25rem' className='clr-text-controls' />
                 )
               }
-            onClick={headMenu.toggle}
+              onClick={handleFolderClick}
               text={head ?? '//'}
             />
 
@@ -174,9 +197,20 @@ function SearchPanel({
                   </DropdownButton>
                 );
               })}
+              <DropdownButton
+                className='w-[10rem]'
+                title='переключение в режим выбора папок'
+                onClick={handleToggleFolder}
+              >
+                <div className='inline-flex items-center gap-3'>
+                  <IconFolderTree size='1rem' className='clr-text-controls' />
+                  <span>проводник...</span>
+                </div>
+              </DropdownButton>
             </Dropdown>
           </div>
-
+        ) : null}
+        {!folderMode ? (
           <SearchBar
             id='path_search'
             placeholder='Путь'
@@ -186,6 +220,7 @@ function SearchPanel({
             value={path}
             onChange={setPath}
           />
+        ) : null}
       </div>
       <Overlay position='top-[-0.75rem] right-0'>
         <BadgeHelp

rsconcept/frontend/src/pages/RSFormPage/EditorRSFormCard/EditorLibraryItem.tsx

@@ -59,7 +59,7 @@ function EditorLibraryItem({ item, isModified, controller }: EditorLibraryItemPr
           />
         </Overlay>
       ) : null}
-      <LabeledValue className='sm:mb-1 text-ellipsis' label='Путь' text={item?.location ?? ''} />
+      <LabeledValue className='max-w-[30rem] sm:mb-1 text-ellipsis' label='Путь' text={item?.location ?? ''} />
 
       {accessLevel >= UserLevel.OWNER ? (
         <Overlay position='top-[-0.5rem] left-[5.5rem] cc-icons'>

rsconcept/frontend/src/pages/RSFormPage/EditorRSFormCard/EditorRSFormCard.tsx

@@ -54,7 +54,7 @@ function EditorRSFormCard({ isModified, onDestroy, setIsModified }: EditorRSForm
         onKeyDown={handleInput}
         className={clsx('sm:w-fit sm:max-w-fit max-w-[32rem]', 'mx-auto ', 'flex flex-col sm:flex-row px-6')}
       >
-        <FlexColumn>
+        <FlexColumn className='flex-shrink'>
           <FormRSForm id={globals.library_item_editor} isModified={isModified} setIsModified={setIsModified} />
           <EditorLibraryItem item={schema} isModified={isModified} controller={controller} />
         </FlexColumn>

rsconcept/frontend/src/utils/constants.ts

@@ -94,6 +94,8 @@ export const storage = {
   rseditShowControls: 'rsedit.show_controls',
 
   librarySearchHead: 'library.search.head',
+  librarySearchFolderMode: 'library.search.folder_mode',
+  librarySearchFolder: 'library.search.folder',
   librarySearchVisible: 'library.search.visible',
   librarySearchOwned: 'library.search.owned',
   librarySearchSubscribed: 'library.search.subscribed',
@@ -144,6 +146,7 @@ export const prefixes = {
   policy_list: 'policy_list_',
   library_filters_list: 'library_filters_list_',
   location_head_list: 'location_head_list_',
+  folders_list: 'folders_list_',
   topic_list: 'topic_list_',
   topic_item: 'topic_item_',
   library_list: 'library_list_',

rsconcept/frontend/src/utils/labels.ts

@@ -5,6 +5,7 @@
  * Description is a long description used in tooltips.
  */
 import { GraphLayout } from '@/components/ui/GraphUI';
+import { FolderNode } from '@/models/FolderTree';
 import { GramData, Grammeme, ReferenceType } from '@/models/language';
 import { AccessPolicy, LibraryItemType, LocationHead } from '@/models/library';
 import { CstMatchMode, DependencyMode, GraphColoring, GraphSizing, HelpTopic } from '@/models/miscellaneous';
@@ -820,6 +821,20 @@ export function describeAccessMode(mode: UserLevel): string {
   }
 }
 
+/**
+ * Retrieves label for {@link FolderNode}.
+ */
+export function labelFolderNode(node: FolderNode): string {
+  return node.text;
+}
+
+/**
+ * Retrieves description for {@link FolderNode}.
+ */
+export function describeFolderNode(node: FolderNode): string {
+  return `${node.filesInside} | ${node.filesTotal}`;
+}
+
 /**
  * Retrieves label for {@link AccessPolicy}.
  */