Implement lazy loading and infinite scroll features in core application

- Added lazy loading for images and initialized infinite scroll in the AppCore class to enhance performance across various pages.
- Updated LoraPageManager and RecipeManager to utilize the new initializePageFeatures method for common UI features.
- Enhanced infinite scroll functionality to dynamically load more content based on the page type, improving user experience.
- Refactored recipes.html to trigger the import modal through the ModalManager for better modal handling.

static/js/core.js

@@ -5,7 +5,8 @@ import { modalManager } from './managers/ModalManager.js';
 import { updateService } from './managers/UpdateService.js';
 import { HeaderManager } from './components/Header.js';
 import { SettingsManager } from './managers/SettingsManager.js';
-import { showToast, initTheme, initBackToTop, updatePanelPositions } from './utils/uiHelpers.js';
+import { showToast, initTheme, initBackToTop, updatePanelPositions, lazyLoadImages } from './utils/uiHelpers.js';
+import { initializeInfiniteScroll } from './utils/infiniteScroll.js';
 
 // Core application class
 export class AppCore {
@@ -55,10 +56,28 @@ export class AppCore {
     showToast(message, type = 'info') {
         showToast(message, type);
     }
+    
+    // Initialize common UI features based on page type
+    initializePageFeatures() {
+        const pageType = this.getPageType();
+        
+        // Initialize lazy loading for images on all pages
+        lazyLoadImages();
+        
+        // Initialize infinite scroll for pages that need it
+        if (['loras', 'recipes', 'checkpoints'].includes(pageType)) {
+            initializeInfiniteScroll(pageType);
+        }
+        
+        // Update panel positions
+        updatePanelPositions();
+        
+        return this;
+    }
 }
 
 // Create and export a singleton instance
 export const appCore = new AppCore();
 
 // Export common utilities for global use
-export { showToast, modalManager, state }; 
+export { showToast, modalManager, state, lazyLoadImages, initializeInfiniteScroll }; 

static/js/loras.js

@@ -65,9 +65,7 @@ class LoraPageManager {
     
     async initialize() {
         // Initialize page-specific components
-        initializeInfiniteScroll();
         initializeEventListeners();
-        lazyLoadImages();
         restoreFolderFilter();
         initFolderTagsVisibility();
         new LoraContextMenu();
@@ -77,6 +75,9 @@ class LoraPageManager {
         
         // Initialize the bulk manager
         bulkManager.initialize();
+        
+        // Initialize common page features (lazy loading, infinite scroll)
+        appCore.initializePageFeatures();
     }
 }
 

static/js/recipes.js

@@ -16,6 +16,10 @@ class RecipeManager {
         
         // Initialize RecipeModal
         this.recipeModal = new RecipeModal();
+        
+        // Add state tracking for infinite scroll
+        this.isLoading = false;
+        this.hasMore = true;
     }
     
     async initialize() {
@@ -27,6 +31,9 @@ class RecipeManager {
         
         // Expose necessary functions to the page
         this._exposeGlobalFunctions();
+        
+        // Initialize common page features (lazy loading, infinite scroll)
+        appCore.initializePageFeatures();
     }
     
     _exposeGlobalFunctions() {
@@ -34,6 +41,7 @@ class RecipeManager {
         window.recipeManager = this;
         window.importRecipes = () => this.importRecipes();
         window.importManager = this.importManager;
+        window.loadMoreRecipes = () => this.loadMoreRecipes();
     }
     
     initEventListeners() {
@@ -69,10 +77,19 @@ class RecipeManager {
         }
     }
     
-    async loadRecipes() {
+    async loadRecipes(resetPage = true) {
         try {
             // Show loading indicator
             document.body.classList.add('loading');
+            this.isLoading = true;
+            
+            // Reset to first page if requested
+            if (resetPage) {
+                this.currentPage = 1;
+                // Clear grid if resetting
+                const grid = document.getElementById('recipeGrid');
+                if (grid) grid.innerHTML = '';
+            }
             
             // Build query parameters
             const params = new URLSearchParams({
@@ -101,7 +118,10 @@ class RecipeManager {
             const data = await response.json();
             
             // Update recipes grid
-            this.updateRecipesGrid(data);
+            this.updateRecipesGrid(data, resetPage);
+            
+            // Update pagination state
+            this.hasMore = data.has_more || false;
             
         } catch (error) {
             console.error('Error loading recipes:', error);
@@ -109,32 +129,61 @@ class RecipeManager {
         } finally {
             // Hide loading indicator
             document.body.classList.remove('loading');
+            this.isLoading = false;
         }
     }
     
-    updateRecipesGrid(data) {
+    // Load more recipes for infinite scroll
+    async loadMoreRecipes() {
+        if (this.isLoading || !this.hasMore) return;
+        
+        this.currentPage++;
+        await this.loadRecipes(false);
+    }
+    
+    updateRecipesGrid(data, resetGrid = true) {
         const grid = document.getElementById('recipeGrid');
         if (!grid) return;
         
         // Check if data exists and has items
         if (!data.items || data.items.length === 0) {
-            grid.innerHTML = `
-                <div class="placeholder-message">
-                    <p>No recipes found</p>
-                    <p>Add recipe images to your recipes folder to see them here.</p>
-                </div>
-            `;
+            if (resetGrid) {
+                grid.innerHTML = `
+                    <div class="placeholder-message">
+                        <p>No recipes found</p>
+                        <p>Add recipe images to your recipes folder to see them here.</p>
+                    </div>
+                `;
+            }
             return;
         }
         
-        // Clear grid
-        grid.innerHTML = '';
+        // Clear grid if resetting
+        if (resetGrid) {
+            grid.innerHTML = '';
+        }
         
         // Create recipe cards
         data.items.forEach(recipe => {
             const recipeCard = new RecipeCard(recipe, (recipe) => this.showRecipeDetails(recipe));
             grid.appendChild(recipeCard.element);
         });
+        
+        // Add sentinel for infinite scroll if needed
+        if (this.hasMore) {
+            let sentinel = document.getElementById('scroll-sentinel');
+            if (!sentinel) {
+                sentinel = document.createElement('div');
+                sentinel.id = 'scroll-sentinel';
+                sentinel.style.height = '10px';
+                grid.appendChild(sentinel);
+                
+                // Re-observe the sentinel if we have an observer
+                if (window.state && window.state.observer) {
+                    window.state.observer.observe(sentinel);
+                }
+            }
+        }
     }
     
     showRecipeDetails(recipe) {

static/js/utils/infiniteScroll.js

@@ -2,12 +2,32 @@ import { state } from '../state/index.js';
 import { loadMoreLoras } from '../api/loraApi.js';
 import { debounce } from './debounce.js';
 
-export function initializeInfiniteScroll() {
+export function initializeInfiniteScroll(pageType = 'loras') {
     if (state.observer) {
         state.observer.disconnect();
     }
 
-    const debouncedLoadMore = debounce(loadMoreLoras, 200);
+    // Determine the load more function and grid ID based on page type
+    let loadMoreFunction;
+    let gridId;
+    
+    switch (pageType) {
+        case 'recipes':
+            loadMoreFunction = window.recipeManager?.loadMoreRecipes || (() => console.warn('loadMoreRecipes not found'));
+            gridId = 'recipeGrid';
+            break;
+        case 'checkpoints':
+            loadMoreFunction = window.checkpointManager?.loadMoreCheckpoints || (() => console.warn('loadMoreCheckpoints not found'));
+            gridId = 'checkpointGrid';
+            break;
+        case 'loras':
+        default:
+            loadMoreFunction = loadMoreLoras;
+            gridId = 'loraGrid';
+            break;
+    }
+
+    const debouncedLoadMore = debounce(loadMoreFunction, 200);
 
     state.observer = new IntersectionObserver(
         (entries) => {
@@ -19,6 +39,12 @@ export function initializeInfiniteScroll() {
         { threshold: 0.1 }
     );
 
+    const grid = document.getElementById(gridId);
+    if (!grid) {
+        console.warn(`Grid with ID "${gridId}" not found for infinite scroll`);
+        return;
+    }
+
     const existingSentinel = document.getElementById('scroll-sentinel');
     if (existingSentinel) {
         state.observer.observe(existingSentinel);
@@ -26,7 +52,7 @@ export function initializeInfiniteScroll() {
         const sentinel = document.createElement('div');
         sentinel.id = 'scroll-sentinel';
         sentinel.style.height = '10px';
-        document.getElementById('loraGrid').appendChild(sentinel);
+        grid.appendChild(sentinel);
         state.observer.observe(sentinel);
     }
 } 

templates/recipes.html

@@ -27,7 +27,7 @@
     <div class="controls">
         <div class="action-buttons">
             <div title="Import recipes" class="control-group">
-                <button onclick="importRecipes()"><i class="fas fa-file-import"></i> Import</button>
+                <button onclick="modalManager.showModal('importModal')"><i class="fas fa-file-import"></i> Import</button>
             </div>
         </div>
     </div>
@@ -85,15 +85,5 @@
         // Will be implemented in recipes.js
         window.location.reload();
     }
-    
-    // Import recipes
-    function importRecipes() {
-        // Show import modal
-        const importModal = document.getElementById('importModal');
-        if (importModal) {
-            importModal.classList.remove('hidden');
-            importModal.style.display = 'block';
-        }
-    }
 </script>
 {% endblock %}