website/js/wysiwyg.js

/**
 * Simple WYSIWYG Editor
 * Lightweight rich text editor for publication content
 */

class WYSIWYGEditor {
    constructor(textareaId, options = {}) {
        this.textarea = document.getElementById(textareaId);
        this.options = {
            toolbar: ['bold', 'italic', 'underline', '|', 'link', 'image', '|', 'ul', 'ol', '|', 'h1', 'h2', 'h3'],
            ...options
        };
        
        this.selectedImages = [];
        this.galleryImages = [];
        this.resizingImage = null;
        this.resizeData = null;
        this.aspectRatioLocked = true;
        
        this.createEditor();
        this.bindEvents();
        this.setupImageUpload();
        this.setupImageResizing();
    }
    
    createEditor() {
        // Create editor container
        this.container = document.createElement('div');
        this.container.className = 'wysiwyg-container';
        
        // Create toolbar
        this.toolbar = document.createElement('div');
        this.toolbar.className = 'wysiwyg-toolbar';
        this.createToolbarButtons();
        
        // Create content area
        this.content = document.createElement('div');
        this.content.className = 'wysiwyg-content';
        this.content.contentEditable = true;
        
        // Create character count
        this.charCount = document.createElement('div');
        this.charCount.className = 'wysiwyg-char-count';
        
        // Assemble editor
        this.container.appendChild(this.toolbar);
        this.container.appendChild(this.content);
        this.container.appendChild(this.charCount);
        
        // Replace textarea
        this.textarea.parentNode.insertBefore(this.container, this.textarea);
        this.textarea.style.display = 'none';
        
        // Initialize content
        this.content.innerHTML = this.textarea.value;
        this.updateCharCount();
    }
    
    createToolbarButtons() {
        this.options.toolbar.forEach(item => {
            if (item === '|') {
                const separator = document.createElement('div');
                separator.className = 'wysiwyg-separator';
                this.toolbar.appendChild(separator);
            } else {
                const button = document.createElement('button');
                button.className = 'wysiwyg-btn';
                button.type = 'button';
                button.innerHTML = this.getButtonLabel(item);
                button.dataset.command = item;
                
                button.addEventListener('click', () => this.execCommand(item));
                this.toolbar.appendChild(button);
            }
        });
    }
    
    getButtonLabel(command) {
        const labels = {
            'bold': 'B',
            'italic': 'I',
            'underline': 'U',
            'link': '🔗',
            'image': '🖼️',
            'ul': '• List',
            'ol': '1. List',
            'h1': 'H1',
            'h2': 'H2',
            'h3': 'H3'
        };
        return labels[command] || command;
    }
    
    execCommand(command) {
        switch (command) {
            case 'bold':
                document.execCommand('bold', false, null);
                break;
            case 'italic':
                document.execCommand('italic', false, null);
                break;
            case 'underline':
                document.execCommand('underline', false, null);
                break;
            case 'link':
                this.insertLink();
                break;
            case 'image':
                this.insertImage();
                break;
            case 'ul':
                document.execCommand('insertUnorderedList', false, null);
                break;
            case 'ol':
                document.execCommand('insertOrderedList', false, null);
                break;
            case 'h1':
                this.formatHeading('h1');
                break;
            case 'h2':
                this.formatHeading('h2');
                break;
            case 'h3':
                this.formatHeading('h3');
                break;
        }
        
        this.content.focus();
    }
    
    insertLink() {
        const selection = window.getSelection();
        const url = prompt('Enter URL:');
        if (url) {
            document.execCommand('createLink', false, url);
        }
    }
    
    insertImage() {
        this.openImageGallery();
    }
    
    openImageGallery() {
        this.selectedImages = [];
        this.loadGalleryImages();
        document.getElementById('imageGallery').classList.add('open');
    }
    
    closeImageGallery() {
        document.getElementById('imageGallery').classList.remove('open');
        this.selectedImages = [];
        this.updateInsertButton();
    }
    
    showGalleryTab(tab) {
        // Hide all tabs
        document.getElementById('galleryBrowse').style.display = 'none';
        document.getElementById('galleryUpload').style.display = 'none';
        
        // Remove active class from all tabs
        document.querySelectorAll('.gallery-tab').forEach(tab => {
            tab.classList.remove('active');
        });
        
        // Show selected tab and add active class
        if (tab === 'browse') {
            document.getElementById('galleryBrowse').style.display = 'block';
            document.querySelectorAll('.gallery-tab')[0].classList.add('active');
        } else if (tab === 'upload') {
            document.getElementById('galleryUpload').style.display = 'block';
            document.querySelectorAll('.gallery-tab')[1].classList.add('active');
        }
    }
    
    async loadGalleryImages() {
        try {
            const response = await fetch('upload_image.php');
            const data = await response.json();
            
            if (data.success) {
                // Store images for later use
                this.galleryImages = data.images;
                this.renderGalleryImages(data.images);
            } else {
                console.error('Failed to load images:', data.error);
                this.galleryImages = [];
            }
        } catch (error) {
            console.error('Error loading images:', error);
            this.galleryImages = [];
        }
    }
    
    renderGalleryImages(images) {
        const grid = document.getElementById('galleryGrid');
        grid.innerHTML = '';
        
        images.forEach(image => {
            const item = document.createElement('div');
            item.className = 'gallery-item';
            item.dataset.imageId = image.id;
            item.dataset.imageUrl = image.url;
            item.dataset.imageName = image.original_name;
            
            item.innerHTML = `
                <div class="gallery-item-container">
                    <img src="${image.thumbnail_url}" alt="${image.original_name}" class="gallery-image">
                    <button class="gallery-delete-btn" onclick="wysiwygEditor.deleteImage(${image.id}, event)" title="Delete image">×</button>
                    <div class="gallery-info">
                        <div class="gallery-name">${image.original_name}</div>
                        <div class="gallery-size">${this.formatFileSize(image.size)}</div>
                    </div>
                </div>
            `;
            
            item.addEventListener('click', () => this.selectImage(item));
            grid.appendChild(item);
        });
    }
    
    selectImage(item) {
        const imageId = item.dataset.imageId;
        
        if (item.classList.contains('selected')) {
            item.classList.remove('selected');
            this.selectedImages = this.selectedImages.filter(id => id !== imageId);
        } else {
            item.classList.add('selected');
            this.selectedImages.push(imageId);
        }
        
        this.updateInsertButton();
    }
    
    updateInsertButton() {
        const insertBtn = document.getElementById('galleryInsertBtn');
        insertBtn.disabled = this.selectedImages.length === 0;
    }
    
    insertSelectedImages() {
        if (this.selectedImages.length === 0) return;
        
        // Insert thumbnail links into content
        this.selectedImages.forEach(imageId => {
            const image = this.galleryImages.find(img => img.id == imageId);
            if (image) {
                // Create link wrapper
                const link = document.createElement('a');
                link.href = image.url;
                link.target = '_blank';
                link.rel = 'noopener noreferrer';
                link.className = 'thumbnail-link';
                
                // Create thumbnail image
                const img = document.createElement('img');
                img.src = image.thumbnail_url;
                img.alt = image.original_name;
                img.className = 'thumbnail-image';
                img.style.maxWidth = '300px';
                img.style.height = 'auto';
                img.style.borderRadius = '4px';
                img.style.boxShadow = '0 2px 8px rgba(0,0,0,0.1)';
                img.style.transition = 'transform 0.2s ease, box-shadow 0.2s ease';
                
                // Add hover effect
                img.addEventListener('mouseenter', () => {
                    img.style.transform = 'scale(1.02)';
                    img.style.boxShadow = '0 4px 16px rgba(0,0,0,0.15)';
                });
                
                img.addEventListener('mouseleave', () => {
                    img.style.transform = 'scale(1)';
                    img.style.boxShadow = '0 2px 8px rgba(0,0,0,0.1)';
                });
                
                // Add click prevention to avoid WYSIWYG selection
                img.addEventListener('click', (e) => e.preventDefault());
                link.addEventListener('click', (e) => e.preventDefault());
                
                // Assemble the link with image
                link.appendChild(img);
                
                // Insert at cursor or end of content
                if (this.selection) {
                    this.selection.deleteContents();
                    this.selection.insertNode(link);
                    this.selection.collapse(false);
                } else {
                    this.content.appendChild(link);
                }
            }
        });
        
        // Update textarea and close gallery
        this.textarea.value = this.content.innerHTML;
        this.closeImageGallery();
    }
    
    // Alias function for backward compatibility
    insertSelectedImage() {
        return this.insertSelectedImages();
    }
    
    async deleteImage(imageId, event) {
        event.stopPropagation(); // Prevent image selection
        
        if (!confirm('Are you sure you want to delete this image?')) {
            return;
        }
        
        try {
            const response = await fetch(`upload_image.php?id=${imageId}`, {
                method: 'DELETE'
            });
            
            const result = await response.json();
            
            if (result.success) {
                // Remove the image from gallery
                const galleryItem = document.querySelector(`[data-image-id="${imageId}"]`);
                if (galleryItem) {
                    galleryItem.remove();
                }
                
                // Show success message
                this.showNotification('Image deleted successfully', 'success');
            } else {
                this.showNotification('Failed to delete image', 'error');
            }
        } catch (error) {
            console.error('Error deleting image:', error);
            this.showNotification('Error deleting image', 'error');
        }
    }
    
    showNotification(message, type = 'info') {
        // Create notification element
        const notification = document.createElement('div');
        notification.className = `notification notification-${type}`;
        notification.textContent = message;
        
        // Add to page
        document.body.appendChild(notification);
        
        // Remove after 3 seconds
        setTimeout(() => {
            notification.remove();
        }, 3000);
    }
    
    setupImageUpload() {
        const uploadArea = document.getElementById('uploadArea');
        const fileInput = document.getElementById('fileInput');
        
        // Click to upload
        uploadArea.addEventListener('click', () => {
            fileInput.click();
        });
        
        // File selection
        fileInput.addEventListener('change', (e) => {
            this.handleFileUpload(e.target.files);
        });
        
        // Drag and drop
        uploadArea.addEventListener('dragover', (e) => {
            e.preventDefault();
            uploadArea.classList.add('dragover');
        });
        
        uploadArea.addEventListener('dragleave', () => {
            uploadArea.classList.remove('dragover');
        });
        
        uploadArea.addEventListener('drop', (e) => {
            e.preventDefault();
            uploadArea.classList.remove('dragover');
            this.handleFileUpload(e.dataTransfer.files);
        });
    }
    
    async handleFileUpload(files) {
        const formData = new FormData();
        
        for (let i = 0; i < files.length; i++) {
            formData.append('images[]', files[i]);
        }
        
        try {
            this.showUploadProgress();
            
            const response = await fetch('upload_image.php', {
                method: 'POST',
                body: formData
            });
            
            const data = await response.json();
            
            if (data.success) {
                this.showUploadSuccess('Images uploaded successfully!');
                // Refresh gallery
                this.loadGalleryImages();
                // Switch to browse tab
                this.showGalleryTab('browse');
            } else {
                this.showUploadError('Upload failed: ' + data.errors.join(', '));
            }
        } catch (error) {
            this.showUploadError('Upload failed: ' + error.message);
        } finally {
            this.hideUploadProgress();
        }
    }
    
    showUploadProgress() {
        document.getElementById('uploadProgress').classList.add('active');
        document.getElementById('uploadStatus').textContent = 'Uploading...';
        document.getElementById('progressFill').style.width = '50%';
    }
    
    hideUploadProgress() {
        document.getElementById('uploadProgress').classList.remove('active');
        document.getElementById('progressFill').style.width = '0%';
    }
    
    showUploadSuccess(message) {
        const status = document.getElementById('uploadStatus');
        status.textContent = message;
        status.className = 'upload-status success';
        
        setTimeout(() => {
            this.hideUploadProgress();
        }, 3000);
    }
    
    showUploadError(message) {
        const status = document.getElementById('uploadStatus');
        status.textContent = message;
        status.className = 'upload-status error';
        
        setTimeout(() => {
            this.hideUploadProgress();
        }, 5000);
    }
    
    formatFileSize(bytes) {
        if (bytes === 0) return '0 Bytes';
        const k = 1024;
        const sizes = ['Bytes', 'KB', 'MB', 'GB'];
        const i = Math.floor(Math.log(bytes) / Math.log(k));
        return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
    }
    
    setupImageResizing() {
        this.content.addEventListener('click', (e) => {
            if (e.target.tagName === 'IMG') {
                this.selectImageForResize(e.target);
            } else if (e.target.closest('.resize-container')) {
                this.selectImageForResize(e.target.closest('.resize-container').querySelector('img'));
            } else {
                this.deselectImageForResize();
            }
        });
        
        // Handle resize handle mouse events
        this.content.addEventListener('mousedown', (e) => {
            if (e.target.classList.contains('resize-handle')) {
                e.preventDefault();
                this.startResize(e);
            }
        });
        
        // Handle global mouse events for resizing
        document.addEventListener('mousemove', (e) => {
            if (this.resizingImage) {
                this.handleResize(e);
            }
        });
        
        document.addEventListener('mouseup', () => {
            if (this.resizingImage) {
                this.stopResize();
            }
        });
    }
    
    selectImageForResize(img) {
        this.deselectImageForResize();
        
        // Wrap image in resize container if not already wrapped
        if (!img.closest('.resize-container')) {
            const container = document.createElement('div');
            container.className = 'resize-container';
            img.parentNode.insertBefore(container, img);
            container.appendChild(img);
        }
        
        const container = img.closest('.resize-container');
        container.classList.add('resizing');
        
        // Add resize handles
        this.addResizeHandles(container);
        
        // Add aspect ratio toggle
        this.addAspectRatioToggle(container);
        
        // Add size display
        this.addSizeDisplay(container);
        
        this.updateSizeDisplay(container);
    }
    
    deselectImageForResize() {
        // Remove all resize containers and handles
        this.content.querySelectorAll('.resize-container').forEach(container => {
            const img = container.querySelector('img');
            if (img) {
                container.parentNode.insertBefore(img, container);
            }
            container.remove();
        });
        
        this.resizingImage = null;
        this.resizeData = null;
    }
    
    addResizeHandles(container) {
        const handles = ['nw', 'ne', 'sw', 'se', 'n', 's', 'w', 'e'];
        
        handles.forEach(position => {
            const handle = document.createElement('div');
            handle.className = `resize-handle ${position}`;
            handle.dataset.position = position;
            container.appendChild(handle);
        });
    }
    
    addAspectRatioToggle(container) {
        const toggle = document.createElement('button');
        toggle.className = 'aspect-ratio-toggle';
        toggle.textContent = this.aspectRatioLocked ? 'Locked' : 'Free';
        toggle.title = 'Toggle aspect ratio lock';
        
        // Set initial locked state
        if (this.aspectRatioLocked) {
            toggle.classList.add('locked');
        }
        
        toggle.addEventListener('click', (e) => {
            e.stopPropagation();
            this.aspectRatioLocked = !this.aspectRatioLocked;
            toggle.textContent = this.aspectRatioLocked ? 'Locked' : 'Free';
            toggle.classList.toggle('locked', this.aspectRatioLocked);
        });
        
        container.appendChild(toggle);
    }
    
    addSizeDisplay(container) {
        const display = document.createElement('div');
        display.className = 'size-display';
        container.appendChild(display);
    }
    
    updateSizeDisplay(container) {
        const img = container.querySelector('img');
        const display = container.querySelector('.size-display');
        if (img && display) {
            display.textContent = `${img.offsetWidth} × ${img.offsetHeight}`;
        }
    }
    
    startResize(e) {
        const handle = e.target;
        const container = handle.closest('.resize-container');
        const img = container.querySelector('img');
        
        this.resizingImage = img;
        this.resizeData = {
            container: container,
            handle: handle,
            position: handle.dataset.position,
            startX: e.clientX,
            startY: e.clientY,
            startWidth: img.offsetWidth,
            startHeight: img.offsetHeight,
            aspectRatio: img.offsetWidth / img.offsetHeight
        };
    }
    
    handleResize(e) {
        if (!this.resizeData) return;
        
        const deltaX = e.clientX - this.resizeData.startX;
        const deltaY = e.clientY - this.resizeData.startY;
        const position = this.resizeData.position;
        
        let newWidth = this.resizeData.startWidth;
        let newHeight = this.resizeData.startHeight;
        
        switch (position) {
            case 'se':
                newWidth = this.resizeData.startWidth + deltaX;
                newHeight = this.aspectRatioLocked 
                    ? newWidth / this.resizeData.aspectRatio 
                    : this.resizeData.startHeight + deltaY;
                break;
            case 'sw':
                newWidth = this.resizeData.startWidth - deltaX;
                newHeight = this.aspectRatioLocked 
                    ? newWidth / this.resizeData.aspectRatio 
                    : this.resizeData.startHeight + deltaY;
                break;
            case 'ne':
                newWidth = this.resizeData.startWidth + deltaX;
                newHeight = this.aspectRatioLocked 
                    ? newWidth / this.resizeData.aspectRatio 
                    : this.resizeData.startHeight - deltaY;
                break;
            case 'nw':
                newWidth = this.resizeData.startWidth - deltaX;
                newHeight = this.aspectRatioLocked 
                    ? newWidth / this.resizeData.aspectRatio 
                    : this.resizeData.startHeight - deltaY;
                break;
            case 'n':
                newHeight = this.resizeData.startHeight - deltaY;
                if (this.aspectRatioLocked) {
                    newWidth = newHeight * this.resizeData.aspectRatio;
                }
                break;
            case 's':
                newHeight = this.resizeData.startHeight + deltaY;
                if (this.aspectRatioLocked) {
                    newWidth = newHeight * this.resizeData.aspectRatio;
                }
                break;
            case 'w':
                newWidth = this.resizeData.startWidth - deltaX;
                if (this.aspectRatioLocked) {
                    newHeight = newWidth / this.resizeData.aspectRatio;
                }
                break;
            case 'e':
                newWidth = this.resizeData.startWidth + deltaX;
                if (this.aspectRatioLocked) {
                    newHeight = newWidth / this.resizeData.aspectRatio;
                }
                break;
        }
        
        // Apply minimum size constraints
        newWidth = Math.max(50, newWidth);
        newHeight = Math.max(50, newHeight);
        
        // Apply new dimensions
        this.resizingImage.style.width = newWidth + 'px';
        this.resizingImage.style.height = newHeight + 'px';
        
        // Update size display
        this.updateSizeDisplay(this.resizeData.container);
    }
    
    stopResize() {
        if (this.resizeData) {
            // Update textarea content
            this.textarea.value = this.content.innerHTML;
            this.updateCharCount();
        }
        
        this.resizingImage = null;
        this.resizeData = null;
    }
    
    formatHeading(tag) {
        const selection = window.getSelection();
        const range = selection.getRangeAt(0);
        const heading = document.createElement(tag);
        heading.textContent = range.toString();
        range.deleteContents();
        range.insertNode(heading);
    }
    
    bindEvents() {
        // Update textarea when content changes
        this.content.addEventListener('input', () => {
            this.textarea.value = this.content.innerHTML;
            this.updateCharCount();
        });
        
        // Update content when textarea changes (for form submission)
        this.textarea.addEventListener('input', () => {
            this.content.innerHTML = this.textarea.value;
            this.updateCharCount();
        });
        
        // Handle paste events
        this.content.addEventListener('paste', (e) => {
            e.preventDefault();
            const text = e.clipboardData.getData('text/html') || e.clipboardData.getData('text/plain');
            document.execCommand('insertHTML', false, text);
        });
        
        // Keyboard shortcuts
        this.content.addEventListener('keydown', (e) => {
            if (e.ctrlKey || e.metaKey) {
                switch (e.key) {
                    case 'b':
                        e.preventDefault();
                        this.execCommand('bold');
                        break;
                    case 'i':
                        e.preventDefault();
                        this.execCommand('italic');
                        break;
                    case 'u':
                        e.preventDefault();
                        this.execCommand('underline');
                        break;
                }
            }
        });
    }
    
    updateCharCount() {
        const text = this.content.innerText || this.content.textContent || '';
        const count = text.length;
        this.charCount.textContent = `Characters: ${count}`;
    }
    
    getContent() {
        return this.content.innerHTML;
    }
    
    setContent(html) {
        this.content.innerHTML = html;
        this.textarea.value = html;
        this.updateCharCount();
    }
    
    destroy() {
        this.textarea.style.display = 'block';
        this.textarea.value = this.content.innerHTML;
        this.container.remove();
    }
}

// Initialize editor when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
    const editor = new WYSIWYGEditor('content');
    
    // Make editor globally accessible
    window.wysiwygEditor = editor;
    
    // Handle form submission
    const form = document.querySelector('.publication-form');
    if (form) {
        form.addEventListener('submit', () => {
            // Ensure textarea has latest content
            document.getElementById('content').value = editor.getContent();
        });
    }
});