feat: Implement collection deletion and loading spinners

- Add API endpoint and handler to delete collections
- Introduce LoadingSpinner component for async operations
- Show loading spinners during file loading and preview rendering
- Enhance modal accessibility by removing aria-hidden attribute
- Refactor delete functionality to distinguish between collections and files/folders
- Remove unused collection definitions from config

collections/documents/docusaurus.md

@@ -0,0 +1,44 @@
+## Using Docusaurus
+
+Once you've set up Hero, you can use it to develop, manage and publish Docusaurus websites.
+
+## Launch the Hero Website
+
+To start a Hero Docusaurus website in development mode:
+
+- Build the book then close the prompt with `Ctrl+C`
+
+  ```bash
+  hero docs -d
+  ```
+
+- See the book on the local browser
+
+  ```
+  bash /root/hero/var/docusaurus/develop.sh
+  ```
+
+You can then view the website in your browser at `https://localhost:3100`.
+
+## Publish a Website
+
+- To build and publish a Hero website:
+  - Development
+
+    ```bash
+    hero docs -bpd
+    ```
+
+  - Production
+
+    ```bash
+    hero docs -bp
+    ```
+
+If you want to specify a different SSH key, use `-dk`:
+
+```bash
+hero docs -bpd -dk ~/.ssh/id_ed25519
+```
+
+> Note: The container handles the SSH agent and key management automatically on startup, so in most cases, you won't need to manually specify keys.

collections/documents/getting_started/hero_docker.md

@@ -0,0 +1,67 @@
+You can build Hero as a Docker container.
+
+The code is availabe at this [open-source repository](https://github.com/mik-tf/hero-container).
+
+## Prerequisites
+
+- Docker installed on your system (More info [here](https://manual.grid.tf/documentation/system_administrators/computer_it_basics/docker_basics.html#install-docker-desktop-and-docker-engine))
+- SSH keys for deploying Hero websites (if publishing)
+
+## Build the Image
+
+- Clone the repository
+
+    ```
+    git clone https://github.com/mik-tf/hero-container
+    cd hero-container
+    ```
+
+- Build the Docker image:
+
+    ```bash
+    docker build -t heroc .
+    ```
+
+## Pull the Image from Docker Hub
+
+If you don't want to build the image, you can pull it from Docker Hub.
+
+```
+docker pull logismosis/heroc
+```
+
+In this case, use `logismosi/heroc` instead of `heroc` to use the container.
+
+## Run the Hero Container
+
+You can run the container with an interactive shell:
+
+```bash
+docker run -it heroc
+```
+
+You can run the container with an interactive shell, while setting the host as your local network, mounting your current directory as the workspace and adding your SSH keys:
+
+```bash
+docker run --network=host \
+  -v $(pwd):/workspace \
+  -v ~/.ssh:/root/ssh \
+  -it heroc
+```
+
+By default, the container will:
+
+- Start Redis server in the background
+- Copy your SSH keys to the proper location
+- Initialize the SSH agent
+- Add your default SSH key (`id_ed25519`)
+
+To use a different SSH key, specify it with the KEY environment variable (e.g. `KEY=id_ed25519`):
+
+```bash
+docker run --network=host \
+  -v $(pwd):/workspace \
+  -v ~/.ssh:/root/ssh \
+  -e KEY=your_custom_key_name \
+  -it heroc
+```

collections/documents/getting_started/hero_native.md

@@ -0,0 +1,22 @@
+## Basic Hero
+
+You can build Hero natively with the following lines:
+
+```
+curl https://raw.githubusercontent.com/freeflowuniverse/herolib/refs/heads/development/install_hero.sh > /tmp/install_hero.sh
+bash /tmp/install_hero.sh
+```
+
+## Hero for Developers
+
+For developers, use the following commands:
+
+```
+curl 'https://raw.githubusercontent.com/freeflowuniverse/herolib/refs/heads/development/install_v.sh' > /tmp/install_v.sh
+bash /tmp/install_v.sh --analyzer --herolib 
+#DONT FORGET TO START A NEW SHELL (otherwise the paths will not be set)
+```
+
+## Hero with Docker
+
+If you have issues running Hero natively, you can use the [Docker version of Hero](hero_docker.md).

collections/documents/intro.md

@@ -0,0 +1,5 @@
+This ebook contains the basic information to get you started with the Hero tool.
+
+## What is Hero?
+
+Hero is an open-source toolset to work with Git, AI, mdBook, Docusaurus, Starlight and more.

collections/documents/support.md

@@ -0,0 +1 @@
+If you need help with Hero, reach out to the ThreeFold Support team [here](https://threefoldfaq.crisp.help/en/).

config.yaml

@@ -8,18 +8,6 @@ collections:
   projects:
     path: ./collections/projects
     description: Project documentation
-  new_collectionss:
-    path: collections/new_collectionss
-    description: 'User-created collection: new_collectionss'
-  test_collection_new:
-    path: collections/test_collection_new
-    description: 'User-created collection: test_collection_new'
-  dynamic_test:
-    path: collections/dynamic_test
-    description: 'User-created collection: dynamic_test'
-  runtime_collection:
-    path: collections/runtime_collection
-    description: 'User-created collection: runtime_collection'
   7madah:
     path: collections/7madah
     description: 'User-created collection: 7madah'

server_webdav.py

@@ -104,6 +104,10 @@ class MarkdownEditorApp:
         if path == '/fs/' and method == 'POST':
             return self.handle_create_collection(environ, start_response)
 
+        # API to delete a collection
+        if path.startswith('/api/collections/') and method == 'DELETE':
+            return self.handle_delete_collection(environ, start_response)
+
         # Check if path starts with a collection name (for SPA routing)
         # This handles URLs like /notes/ttt or /documents/file.md
         # MUST be checked BEFORE WebDAV routing to prevent WebDAV from intercepting SPA routes
@@ -205,7 +209,68 @@ class MarkdownEditorApp:
             print(f"Error creating collection: {e}")
             start_response('500 Internal Server Error', [('Content-Type', 'application/json')])
             return [json.dumps({'error': str(e)}).encode('utf-8')]
-    
+
+    def handle_delete_collection(self, environ, start_response):
+        """Delete a collection"""
+        try:
+            # Extract collection name from path: /api/collections/{name}
+            path = environ.get('PATH_INFO', '')
+            collection_name = path.split('/')[-1]
+
+            if not collection_name:
+                start_response('400 Bad Request', [('Content-Type', 'application/json')])
+                return [json.dumps({'error': 'Collection name is required'}).encode('utf-8')]
+
+            # Check if collection exists
+            if collection_name not in self.collections:
+                start_response('404 Not Found', [('Content-Type', 'application/json')])
+                return [json.dumps({'error': f'Collection "{collection_name}" not found'}).encode('utf-8')]
+
+            # Get collection path
+            collection_config = self.collections[collection_name]
+            collection_path = Path(collection_config['path'])
+
+            # Delete the collection directory and all its contents
+            import shutil
+            if collection_path.exists():
+                shutil.rmtree(collection_path)
+                print(f"Deleted collection directory: {collection_path}")
+
+            # Remove from collections dict
+            del self.collections[collection_name]
+
+            # Update config file
+            self.save_config()
+
+            # Remove from WebDAV provider mapping
+            provider_key = f'/fs/{collection_name}'
+            if hasattr(self.webdav_app, 'provider_map') and provider_key in self.webdav_app.provider_map:
+                del self.webdav_app.provider_map[provider_key]
+                print(f"Removed provider from provider_map: {provider_key}")
+
+            # Remove from sorted_share_list if it exists
+            if hasattr(self.webdav_app, 'sorted_share_list') and provider_key in self.webdav_app.sorted_share_list:
+                self.webdav_app.sorted_share_list.remove(provider_key)
+                print(f"Removed from sorted_share_list: {provider_key}")
+
+            print(f"Deleted collection '{collection_name}'")
+
+            response_body = json.dumps({'success': True, 'name': collection_name}).encode('utf-8')
+            start_response('200 OK', [
+                ('Content-Type', 'application/json'),
+                ('Content-Length', str(len(response_body))),
+                ('Access-Control-Allow-Origin', '*')
+            ])
+
+            return [response_body]
+
+        except Exception as e:
+            print(f"Error deleting collection: {e}")
+            import traceback
+            traceback.print_exc()
+            start_response('500 Internal Server Error', [('Content-Type', 'application/json')])
+            return [json.dumps({'error': str(e)}).encode('utf-8')]
+
     def handle_static(self, environ, start_response):
         """Serve static files"""
         path = environ.get('PATH_INFO', '')[1:]  # Remove leading /

static/css/components.css

@@ -388,4 +388,66 @@ body.dark-mode #darkModeBtn i {
 #darkModeBtn:hover i {
     color: inherit;
     /* Inherit hover color from parent */
+}
+
+/* ===================================
+   Loading Spinner Component
+   =================================== */
+
+/* Loading overlay - covers the target container */
+.loading-overlay {
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: var(--bg-primary);
+    opacity: 0.95;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 1000;
+    transition: opacity 0.2s ease;
+}
+
+/* Loading spinner */
+.loading-spinner {
+    width: 48px;
+    height: 48px;
+    border: 4px solid var(--border-color);
+    border-top-color: var(--primary-color);
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+}
+
+/* Spinner animation */
+@keyframes spin {
+    to {
+        transform: rotate(360deg);
+    }
+}
+
+/* Loading text */
+.loading-text {
+    margin-top: 16px;
+    color: var(--text-secondary);
+    font-size: 14px;
+    text-align: center;
+}
+
+/* Loading container with spinner and text */
+.loading-content {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 12px;
+}
+
+/* Hide loading overlay by default */
+.loading-overlay.hidden {
+    display: none;
+}
+
+.language-bash {
+    color: var(--text-primary) !important;
 }

static/css/layout.css

@@ -119,7 +119,7 @@ body {
 #sidebarPane {
     flex: 0 0 20%;
     min-width: 150px;
-    max-width: 40%;
+    max-width: 20%;
     padding: 0;
     height: 100%;
     overflow: hidden;

static/js/app.js

@@ -337,6 +337,12 @@ document.addEventListener('DOMContentLoaded', async () => {
 
                 Logger.info(`Previewing binary file: ${item.path}`);
 
+                // Initialize and show loading spinner for binary file preview
+                editor.initLoadingSpinners();
+                if (editor.previewSpinner) {
+                    editor.previewSpinner.show(`Loading ${fileType.toLowerCase()}...`);
+                }
+
                 // Set flag to prevent auto-update of preview
                 editor.isShowingCustomPreview = true;
 
@@ -403,6 +409,14 @@ document.addEventListener('DOMContentLoaded', async () => {
                 // Display in preview pane
                 editor.previewElement.innerHTML = previewHtml;
 
+                // Hide loading spinner after content is set
+                // Add small delay for images to start loading
+                setTimeout(() => {
+                    if (editor.previewSpinner) {
+                        editor.previewSpinner.hide();
+                    }
+                }, fileType === 'Image' ? 300 : 100);
+
                 // Highlight the file in the tree
                 fileTree.selectAndExpandPath(item.path);
 

static/js/confirmation.js

@@ -70,12 +70,13 @@ class ModalManager {
                 }
             }, { once: true });
 
+            // Remove aria-hidden before showing to prevent accessibility warning
+            this.modalElement.removeAttribute('aria-hidden');
+
             this.modal.show();
 
             // Focus confirm button after modal is shown
             this.modalElement.addEventListener('shown.bs.modal', () => {
-                // Ensure aria-hidden is removed (Bootstrap should do this, but be explicit)
-                this.modalElement.removeAttribute('aria-hidden');
                 this.confirmButton.focus();
             }, { once: true });
         });
@@ -130,12 +131,13 @@ class ModalManager {
                 }
             }, { once: true });
 
+            // Remove aria-hidden before showing to prevent accessibility warning
+            this.modalElement.removeAttribute('aria-hidden');
+
             this.modal.show();
 
             // Focus and select input after modal is shown
             this.modalElement.addEventListener('shown.bs.modal', () => {
-                // Ensure aria-hidden is removed (Bootstrap should do this, but be explicit)
-                this.modalElement.removeAttribute('aria-hidden');
                 this.inputElement.focus();
                 this.inputElement.select();
             }, { once: true });

static/js/editor.js

@@ -16,6 +16,10 @@ class MarkdownEditor {
         this.editor = null; // Will be initialized later
         this.isShowingCustomPreview = false; // Flag to prevent auto-update when showing binary files
 
+        // Initialize loading spinners (will be created lazily when needed)
+        this.editorSpinner = null;
+        this.previewSpinner = null;
+
         // Only initialize CodeMirror if not in read-only mode (view mode)
         if (!readOnly) {
             this.initCodeMirror();
@@ -206,11 +210,34 @@ class MarkdownEditor {
         }
     }
 
+    /**
+     * Initialize loading spinners (lazy initialization)
+     */
+    initLoadingSpinners() {
+        if (!this.editorSpinner && !this.readOnly && this.editorElement) {
+            this.editorSpinner = new LoadingSpinner(this.editorElement, 'Loading file...');
+        }
+        if (!this.previewSpinner && this.previewElement) {
+            this.previewSpinner = new LoadingSpinner(this.previewElement, 'Rendering preview...');
+        }
+    }
+
     /**
      * Load file
      */
     async loadFile(path) {
         try {
+            // Initialize loading spinners if not already done
+            this.initLoadingSpinners();
+
+            // Show loading spinners
+            if (this.editorSpinner) {
+                this.editorSpinner.show('Loading file...');
+            }
+            if (this.previewSpinner) {
+                this.previewSpinner.show('Loading preview...');
+            }
+
             // Reset custom preview flag when loading text files
             this.isShowingCustomPreview = false;
 
@@ -232,8 +259,25 @@ class MarkdownEditor {
 
             // Save as last viewed page
             this.saveLastViewedPage(path);
+
+            // Hide loading spinners
+            if (this.editorSpinner) {
+                this.editorSpinner.hide();
+            }
+            if (this.previewSpinner) {
+                this.previewSpinner.hide();
+            }
+
             // No notification for successful file load - it's not critical
         } catch (error) {
+            // Hide loading spinners on error
+            if (this.editorSpinner) {
+                this.editorSpinner.hide();
+            }
+            if (this.previewSpinner) {
+                this.previewSpinner.hide();
+            }
+
             console.error('Failed to load file:', error);
             if (window.showNotification) {
                 window.showNotification('Failed to load file', 'danger');
@@ -409,6 +453,14 @@ class MarkdownEditor {
         }
 
         try {
+            // Initialize loading spinners if not already done
+            this.initLoadingSpinners();
+
+            // Show preview loading spinner (only if not already shown by loadFile)
+            if (this.previewSpinner && !this.previewSpinner.isVisible()) {
+                this.previewSpinner.show('Rendering preview...');
+            }
+
             // Step 0: Convert JSX-style syntax to HTML
             let processedContent = this.convertJSXToHTML(markdown);
 
@@ -422,6 +474,9 @@ class MarkdownEditor {
             if (!this.marked) {
                 console.error("Markdown parser (marked) not initialized.");
                 previewDiv.innerHTML = `<div class="alert alert-danger">Preview engine not loaded.</div>`;
+                if (this.previewSpinner) {
+                    this.previewSpinner.hide();
+                }
                 return;
             }
 
@@ -459,6 +514,13 @@ class MarkdownEditor {
                     console.warn('Mermaid rendering error:', error);
                 }
             }
+
+            // Hide preview loading spinner after a small delay to ensure rendering is complete
+            setTimeout(() => {
+                if (this.previewSpinner) {
+                    this.previewSpinner.hide();
+                }
+            }, 100);
         } catch (error) {
             console.error('Preview rendering error:', error);
             previewDiv.innerHTML = `
@@ -467,6 +529,11 @@ class MarkdownEditor {
                     ${error.message}
                 </div>
             `;
+
+            // Hide loading spinner on error
+            if (this.previewSpinner) {
+                this.previewSpinner.hide();
+            }
         }
     }
 

static/js/file-tree-actions.js

@@ -189,26 +189,62 @@ class FileTreeActions {
         },
 
         delete: async function (path, isDir) {
-            const name = path.split('/').pop();
+            const name = path.split('/').pop() || this.webdavClient.currentCollection;
             const type = isDir ? 'folder' : 'file';
 
-            const confirmed = await window.ModalManager.confirm(
+            // Check if this is a root-level collection (empty path or single-level path)
-                `Are you sure you want to delete ${name}?`,
+            const pathParts = path.split('/').filter(p => p.length > 0);
-                `Delete this ${type}?`,
+            const isCollection = pathParts.length === 0;
-                true
-            );
 
-            if (!confirmed) return;
+            if (isCollection) {
+                // Deleting a collection - use backend API
+                const confirmed = await window.ModalManager.confirm(
+                    `Are you sure you want to delete the collection "${name}"? This will delete all files and folders in it.`,
+                    'Delete Collection?',
+                    true
+                );
 
-            await this.webdavClient.delete(path);
+                if (!confirmed) return;
 
-            // Clear undo history since manual delete occurred
+                try {
-            if (this.fileTree.lastMoveOperation) {
+                    // Call backend API to delete collection
-                this.fileTree.lastMoveOperation = null;
+                    const response = await fetch(`/api/collections/${name}`, {
+                        method: 'DELETE'
+                    });
+
+                    if (!response.ok) {
+                        const error = await response.text();
+                        throw new Error(error || 'Failed to delete collection');
+                    }
+
+                    showNotification(`Collection "${name}" deleted successfully`, 'success');
+
+                    // Reload the page to refresh collections list
+                    window.location.href = '/';
+                } catch (error) {
+                    Logger.error('Failed to delete collection:', error);
+                    showNotification(`Failed to delete collection: ${error.message}`, 'error');
+                }
+            } else {
+                // Deleting a regular file/folder - use WebDAV
+                const confirmed = await window.ModalManager.confirm(
+                    `Are you sure you want to delete ${name}?`,
+                    `Delete this ${type}?`,
+                    true
+                );
+
+                if (!confirmed) return;
+
+                await this.webdavClient.delete(path);
+
+                // Clear undo history since manual delete occurred
+                if (this.fileTree.lastMoveOperation) {
+                    this.fileTree.lastMoveOperation = null;
+                }
+
+                await this.fileTree.load();
+                showNotification(`Deleted ${name}`, 'success');
             }
-
-            await this.fileTree.load();
-            showNotification(`Deleted ${name}`, 'success');
         },
 
         download: async function (path, isDir) {

static/js/loading-spinner.js

@@ -0,0 +1,151 @@
+/**
+ * Loading Spinner Component
+ * Displays a loading overlay with spinner for async operations
+ */
+
+class LoadingSpinner {
+    /**
+     * Create a loading spinner for a container
+     * @param {string|HTMLElement} container - Container element or ID
+     * @param {string} message - Optional loading message
+     */
+    constructor(container, message = 'Loading...') {
+        this.container = typeof container === 'string'
+            ? document.getElementById(container)
+            : container;
+
+        if (!this.container) {
+            Logger.error('LoadingSpinner: Container not found');
+            return;
+        }
+
+        this.message = message;
+        this.overlay = null;
+        this.isShowing = false;
+        this.showTime = null; // Track when spinner was shown
+        this.minDisplayTime = 300; // Minimum time to show spinner (ms)
+
+        // Ensure container has position relative for absolute positioning
+        const position = window.getComputedStyle(this.container).position;
+        if (position === 'static') {
+            this.container.style.position = 'relative';
+        }
+    }
+
+    /**
+     * Show the loading spinner
+     * @param {string} message - Optional custom message
+     */
+    show(message = null) {
+        if (this.isShowing) return;
+
+        // Record when spinner was shown
+        this.showTime = Date.now();
+
+        // Create overlay if it doesn't exist
+        if (!this.overlay) {
+            this.overlay = this.createOverlay(message || this.message);
+            this.container.appendChild(this.overlay);
+        } else {
+            // Update message if provided
+            if (message) {
+                const textElement = this.overlay.querySelector('.loading-text');
+                if (textElement) {
+                    textElement.textContent = message;
+                }
+            }
+            this.overlay.classList.remove('hidden');
+        }
+
+        this.isShowing = true;
+        Logger.debug(`Loading spinner shown: ${message || this.message}`);
+    }
+
+    /**
+     * Hide the loading spinner
+     * Ensures minimum display time for better UX
+     */
+    hide() {
+        if (!this.isShowing || !this.overlay) return;
+
+        // Calculate how long the spinner has been showing
+        const elapsed = Date.now() - this.showTime;
+        const remaining = Math.max(0, this.minDisplayTime - elapsed);
+
+        // If minimum time hasn't elapsed, delay hiding
+        if (remaining > 0) {
+            setTimeout(() => {
+                this.overlay.classList.add('hidden');
+                this.isShowing = false;
+                Logger.debug('Loading spinner hidden');
+            }, remaining);
+        } else {
+            this.overlay.classList.add('hidden');
+            this.isShowing = false;
+            Logger.debug('Loading spinner hidden');
+        }
+    }
+
+    /**
+     * Remove the loading spinner from DOM
+     */
+    destroy() {
+        if (this.overlay && this.overlay.parentNode) {
+            this.overlay.parentNode.removeChild(this.overlay);
+            this.overlay = null;
+        }
+        this.isShowing = false;
+    }
+
+    /**
+     * Create the overlay element
+     * @param {string} message - Loading message
+     * @returns {HTMLElement} The overlay element
+     */
+    createOverlay(message) {
+        const overlay = document.createElement('div');
+        overlay.className = 'loading-overlay';
+
+        const content = document.createElement('div');
+        content.className = 'loading-content';
+
+        const spinner = document.createElement('div');
+        spinner.className = 'loading-spinner';
+
+        const text = document.createElement('div');
+        text.className = 'loading-text';
+        text.textContent = message;
+
+        content.appendChild(spinner);
+        content.appendChild(text);
+        overlay.appendChild(content);
+
+        return overlay;
+    }
+
+    /**
+     * Update the loading message
+     * @param {string} message - New message
+     */
+    updateMessage(message) {
+        this.message = message;
+        if (this.overlay && this.isShowing) {
+            const textElement = this.overlay.querySelector('.loading-text');
+            if (textElement) {
+                textElement.textContent = message;
+            }
+        }
+    }
+
+    /**
+     * Check if spinner is currently showing
+     * @returns {boolean} True if showing
+     */
+    isVisible() {
+        return this.isShowing;
+    }
+}
+
+// Make LoadingSpinner globally available
+window.LoadingSpinner = LoadingSpinner;
+

templates/index.html

@@ -238,6 +238,7 @@
     <script src="/static/js/sidebar-toggle.js" defer></script>
     <script src="/static/js/collection-selector.js" defer></script>
     <script src="/static/js/editor-drop-handler.js" defer></script>
+    <script src="/static/js/loading-spinner.js" defer></script>
 
     <!-- Core Application Modules -->
     <script src="/static/js/webdav-client.js" defer></script>