WP Navigator MCP

/** * Gutenberg Builder Adapter * * Converts between WordPress Gutenberg blocks and neutral layout model. * * @package WP_Navigator_Pro * @since 1.2.0 */ import type { BuilderAdapter, PageData, BuilderDetectionResult, ConversionOptions, ConversionResult, ConversionWarning, AdapterVersion, AdapterCapabilities, } from './types.js'; import type { NeutralLayout, LayoutElement, LayoutElementType, HeadingAttributes, ImageAttributes, ButtonAttributes, ColumnAttributes, SectionAttributes, ListAttributes, QuoteAttributes, EmbedAttributes, SpacerAttributes, SeparatorAttributes, } from '../layout/types.js'; import type { BlockSnapshot } from '../snapshots/types.js'; import { parseGutenbergBlocks, serializeBlocks, flattenBlocks, countBlocks, } from '../gutenberg/index.js'; // ============================================================================= // Block Type Mapping // ============================================================================= /** * Map Gutenberg block names to neutral element types */ const BLOCK_TO_ELEMENT_MAP: Record<string, LayoutElementType> = { // Structural 'core/group': 'group', 'core/columns': 'row', 'core/column': 'column', 'core/cover': 'section', 'core/template-part': 'section', // Content 'core/paragraph': 'paragraph', 'core/heading': 'heading', 'core/list': 'list', 'core/list-item': 'text', 'core/quote': 'quote', 'core/pullquote': 'quote', 'core/code': 'code', 'core/preformatted': 'code', 'core/verse': 'text', 'core/freeform': 'html', // Media 'core/image': 'image', 'core/gallery': 'gallery', 'core/video': 'video', 'core/audio': 'audio', 'core/file': 'button', 'core/media-text': 'row', 'core/embed': 'embed', 'core-embed/youtube': 'embed', 'core-embed/vimeo': 'embed', 'core-embed/twitter': 'embed', // Interactive 'core/button': 'button', 'core/buttons': 'buttons', 'core/search': 'form', // Special 'core/separator': 'separator', 'core/spacer': 'spacer', 'core/html': 'html', 'core/shortcode': 'shortcode', 'core/block': 'unknown', // Reusable block reference }; /** * Map neutral element types back to Gutenberg block names */ const ELEMENT_TO_BLOCK_MAP: Record<LayoutElementType, string> = { section: 'core/group', container: 'core/group', row: 'core/columns', column: 'core/column', group: 'core/group', heading: 'core/heading', paragraph: 'core/paragraph', text: 'core/paragraph', list: 'core/list', quote: 'core/quote', code: 'core/code', image: 'core/image', video: 'core/video', audio: 'core/audio', gallery: 'core/gallery', embed: 'core/embed', button: 'core/button', buttons: 'core/buttons', form: 'core/html', input: 'core/html', separator: 'core/separator', spacer: 'core/spacer', html: 'core/html', shortcode: 'core/shortcode', unknown: 'core/html', }; // ============================================================================= // Gutenberg Adapter Implementation // ============================================================================= /** * Gutenberg Builder Adapter * * Reference implementation of BuilderAdapter for WordPress Block Editor. */ export class GutenbergAdapter implements BuilderAdapter { readonly name = 'gutenberg'; readonly displayName = 'Gutenberg (Block Editor)'; readonly supported = true; readonly version: AdapterVersion = { adapter: '1.0.0', minBuilderVersion: '5.0.0', // WordPress 5.0+ }; readonly capabilities: AdapterCapabilities = { canExtract: true, canApply: true, canDetect: true, supportsNesting: true, supportsResponsive: true, supportsAnimations: false, supportedElements: [ 'section', 'container', 'row', 'column', 'group', 'heading', 'paragraph', 'text', 'list', 'quote', 'code', 'image', 'video', 'audio', 'gallery', 'embed', 'button', 'buttons', 'separator', 'spacer', 'html', 'shortcode', ], }; // --------------------------------------------------------------------------- // Detection // --------------------------------------------------------------------------- /** * Detect if content uses Gutenberg blocks */ detect(page: PageData): BuilderDetectionResult { const content = page.content.raw || page.content.rendered || ''; // Look for Gutenberg block comment markers const hasBlockComments = content.includes('<!-- wp:'); const hasSelfClosingBlocks = /<!-- wp:\w+[^>]*\/-->/.test(content); const hasClosingTags = /<!-- \/wp:\w+/.test(content); // Count blocks for confidence let blockCount = 0; if (hasBlockComments) { const matches = content.match(/<!-- wp:/g); blockCount = matches ? matches.length : 0; } // Calculate confidence based on markers found let confidence = 0; if (hasBlockComments) confidence += 0.5; if (hasSelfClosingBlocks) confidence += 0.2; if (hasClosingTags) confidence += 0.2; if (blockCount > 5) confidence += 0.1; return { detected: hasBlockComments, confidence: Math.min(confidence, 1), method: 'content', details: { blockCount, hasSelfClosingBlocks, hasClosingTags, }, }; } // --------------------------------------------------------------------------- // Extraction (Gutenberg → Neutral) // --------------------------------------------------------------------------- /** * Extract neutral layout from page data */ extractLayout(page: PageData, options: ConversionOptions = {}): ConversionResult<NeutralLayout> { const content = page.content.raw || ''; return this.extractLayoutFromContent(content, options); } /** * Extract neutral layout from raw content */ extractLayoutFromContent( content: string, options: ConversionOptions = {} ): ConversionResult<NeutralLayout> { const startTime = Date.now(); const warnings: ConversionWarning[] = []; const unsupportedElements: string[] = []; // Parse Gutenberg blocks const blocks = parseGutenbergBlocks(content); // Convert blocks to neutral elements const elements: LayoutElement[] = []; for (const block of blocks) { const element = this.blockToElement(block, warnings, unsupportedElements, options); if (element) { elements.push(element); } } // Build layout const layout: NeutralLayout = { layout_version: '1.0', source: { builder: this.name, formatVersion: '1.0', }, elements, }; // Add builder metadata if preserving if (options.preserveBuilderData) { layout._builderMetadata = { rawContent: content, originalBlockCount: blocks.length, }; } const totalBlocks = countBlocks(blocks); const convertedCount = this.countElements(elements); return { data: layout, success: true, warnings, unsupportedElements: unsupportedElements.length > 0 ? unsupportedElements : undefined, stats: { totalElements: totalBlocks, convertedElements: convertedCount, skippedElements: totalBlocks - convertedCount, processingTime: Date.now() - startTime, }, }; } /** * Convert a single Gutenberg block to neutral element */ private blockToElement( block: BlockSnapshot, warnings: ConversionWarning[], unsupportedElements: string[], options: ConversionOptions ): LayoutElement | null { const elementType = BLOCK_TO_ELEMENT_MAP[block.blockName] || 'unknown'; // Track unsupported blocks if (elementType === 'unknown' && !BLOCK_TO_ELEMENT_MAP[block.blockName]) { unsupportedElements.push(block.blockName); if (options.strict) { warnings.push({ code: 'UNSUPPORTED_BLOCK', message: `Unsupported block type: ${block.blockName}`, severity: 'warning', }); } if (options.stripUnknown) { return null; } } // Convert inner blocks recursively const children: LayoutElement[] = []; for (const innerBlock of block.innerBlocks) { const child = this.blockToElement(innerBlock, warnings, unsupportedElements, options); if (child) { children.push(child); } } // Build element based on type return this.buildElement(elementType, block, children, options); } /** * Build a neutral element from block data */ private buildElement( type: LayoutElementType, block: BlockSnapshot, children: LayoutElement[], options: ConversionOptions ): LayoutElement { const baseAttrs: Record<string, unknown> = {}; // Preserve builder data if requested if (options.preserveBuilderData) { baseAttrs._builderData = { blockName: block.blockName, originalAttrs: block.attrs, }; } // Extract common attributes if (block.attrs.className) { baseAttrs.className = block.attrs.className as string; } if (block.attrs.anchor) { baseAttrs.anchor = block.attrs.anchor as string; } // Extract background/color attributes if (block.attrs.backgroundColor || block.attrs.gradient) { const bgAttrs: Record<string, unknown> = {}; if (block.attrs.backgroundColor) bgAttrs.color = block.attrs.backgroundColor; if (block.attrs.gradient) bgAttrs.gradient = block.attrs.gradient; baseAttrs.background = bgAttrs; } // Handle specific element types switch (type) { case 'heading': { const headingAttrs: Record<string, unknown> = { ...baseAttrs, level: (block.attrs.level as 1 | 2 | 3 | 4 | 5 | 6) || 2, }; if (block.attrs.textAlign) { headingAttrs.typography = { textAlign: block.attrs.textAlign as 'left' | 'center' | 'right', }; } return { type: 'heading', attrs: headingAttrs as unknown as HeadingAttributes, content: this.extractTextContent(block.innerHTML), children: children.length > 0 ? children : undefined, }; } case 'paragraph': case 'text': { const paraAttrs: Record<string, unknown> = { ...baseAttrs }; if (block.attrs.align) { paraAttrs.typography = { textAlign: block.attrs.align as 'left' | 'center' | 'right' }; } if (block.attrs.dropCap && baseAttrs._builderData) { paraAttrs._builderData = { ...(baseAttrs._builderData as object), dropCap: true }; } else if (block.attrs.dropCap) { paraAttrs._builderData = { dropCap: true }; } return { type: 'paragraph', attrs: paraAttrs, content: block.innerHTML, }; } case 'image': { const imageAttrs: Record<string, unknown> = { ...baseAttrs, src: (block.attrs.url as string) || this.extractImageSrc(block.innerHTML), alt: (block.attrs.alt as string) || '', width: block.attrs.width as number, height: block.attrs.height as number, caption: block.attrs.caption as string, mediaId: block.attrs.id as number, sizeSlug: block.attrs.sizeSlug as string, }; if (block.attrs.linkDestination) { imageAttrs.linkUrl = block.attrs.href as string; } return { type: 'image', attrs: imageAttrs as unknown as ImageAttributes, }; } case 'button': return { type: 'button', attrs: { ...baseAttrs, url: block.attrs.url as string, target: block.attrs.linkTarget as '_self' | '_blank', rel: block.attrs.rel as string, } as ButtonAttributes, content: this.extractTextContent(block.innerHTML), }; case 'buttons': return { type: 'buttons', attrs: baseAttrs, children, }; case 'row': // columns return { type: 'row', attrs: { ...baseAttrs, verticalAlignment: block.attrs.verticalAlignment as 'top' | 'center' | 'bottom', } as SectionAttributes, children, }; case 'column': return { type: 'column', attrs: { ...baseAttrs, width: block.attrs.width as string, verticalAlignment: block.attrs.verticalAlignment as 'top' | 'center' | 'bottom', } as ColumnAttributes, children, }; case 'group': case 'section': { const sectionAttrs: Record<string, unknown> = { ...baseAttrs }; if (block.attrs.layout) { const layoutAttr = block.attrs.layout as Record<string, unknown>; sectionAttrs.layout = { display: layoutAttr.type === 'flex' ? 'flex' : undefined, flexDirection: layoutAttr.orientation === 'horizontal' ? 'row' : 'column', justifyContent: layoutAttr.justifyContent, }; } return { type: type as 'group' | 'section', attrs: sectionAttrs as SectionAttributes, children, }; } case 'list': return { type: 'list', attrs: { ...baseAttrs, ordered: block.attrs.ordered as boolean, start: block.attrs.start as number, reversed: block.attrs.reversed as boolean, } as ListAttributes, content: block.innerHTML, }; case 'quote': return { type: 'quote', attrs: { ...baseAttrs, citation: block.attrs.citation as string, } as QuoteAttributes, content: block.innerHTML, }; case 'embed': return { type: 'embed', attrs: { ...baseAttrs, url: (block.attrs.url as string) || '', provider: block.attrs.providerNameSlug as string, aspectRatio: block.attrs.aspectRatio as string, } as EmbedAttributes, }; case 'separator': { const className = block.attrs.className as string | undefined; let separatorStyle: 'default' | 'wide' | 'dots' = 'default'; if (className?.includes('is-style-wide')) separatorStyle = 'wide'; else if (className?.includes('is-style-dots')) separatorStyle = 'dots'; return { type: 'separator', attrs: { ...baseAttrs, style: separatorStyle, } as SeparatorAttributes, }; } case 'spacer': return { type: 'spacer', attrs: { ...baseAttrs, height: (block.attrs.height as string) || '100px', } as SpacerAttributes, }; case 'html': return { type: 'html', attrs: { ...baseAttrs, html: block.innerHTML, }, }; case 'code': return { type: 'code', attrs: baseAttrs, content: this.extractTextContent(block.innerHTML), }; default: return { type: 'unknown', attrs: { ...baseAttrs, _builderData: { blockName: block.blockName, originalAttrs: block.attrs, innerHTML: block.innerHTML, }, }, children: children.length > 0 ? children : undefined, }; } } // --------------------------------------------------------------------------- // Application (Neutral → Gutenberg) // --------------------------------------------------------------------------- /** * Apply neutral layout to generate Gutenberg content */ applyLayout(layout: NeutralLayout, options: ConversionOptions = {}): ConversionResult<string> { const startTime = Date.now(); const warnings: ConversionWarning[] = []; const unsupportedElements: string[] = []; // Convert elements to blocks const blocks: BlockSnapshot[] = []; for (const element of layout.elements) { const block = this.elementToBlock(element, warnings, unsupportedElements, options); if (block) { blocks.push(block); } } // Serialize blocks to WordPress format const content = serializeBlocks(blocks); return { data: content, success: true, warnings, unsupportedElements: unsupportedElements.length > 0 ? unsupportedElements : undefined, stats: { totalElements: this.countElements(layout.elements), convertedElements: countBlocks(blocks), skippedElements: 0, processingTime: Date.now() - startTime, }, }; } /** * Convert a neutral element to Gutenberg block */ private elementToBlock( element: LayoutElement, warnings: ConversionWarning[], unsupportedElements: string[], options: ConversionOptions ): BlockSnapshot | null { const blockName = ELEMENT_TO_BLOCK_MAP[element.type] || 'core/html'; // Convert children recursively const innerBlocks: BlockSnapshot[] = []; if (element.children) { for (const child of element.children) { const childBlock = this.elementToBlock(child, warnings, unsupportedElements, options); if (childBlock) { innerBlocks.push(childBlock); } } } // Build block based on element type return this.buildBlock(blockName, element, innerBlocks); } /** * Build a Gutenberg block from neutral element */ private buildBlock( blockName: string, element: LayoutElement, innerBlocks: BlockSnapshot[] ): BlockSnapshot { const attrs: Record<string, unknown> = {}; // Restore builder data if present if (element.attrs._builderData) { Object.assign(attrs, (element.attrs._builderData as any).originalAttrs || {}); } // Apply common attributes if (element.attrs.className) { attrs.className = element.attrs.className; } if (element.attrs.anchor) { attrs.anchor = element.attrs.anchor; } // Build innerHTML based on element type let innerHTML = ''; switch (element.type) { case 'heading': { const headingEl = element as { attrs: HeadingAttributes; content: string }; attrs.level = headingEl.attrs.level; if (headingEl.attrs.typography?.textAlign) { attrs.textAlign = headingEl.attrs.typography.textAlign; } innerHTML = `<h${headingEl.attrs.level}>${headingEl.content}</h${headingEl.attrs.level}>`; break; } case 'paragraph': case 'text': { const textEl = element as { content: string }; innerHTML = textEl.content.startsWith('<p>') ? textEl.content : `<p>${textEl.content}</p>`; break; } case 'image': { const imgEl = element as { attrs: ImageAttributes }; attrs.url = imgEl.attrs.src; attrs.alt = imgEl.attrs.alt || ''; if (imgEl.attrs.width) attrs.width = imgEl.attrs.width; if (imgEl.attrs.height) attrs.height = imgEl.attrs.height; if (imgEl.attrs.mediaId) attrs.id = imgEl.attrs.mediaId; if (imgEl.attrs.sizeSlug) attrs.sizeSlug = imgEl.attrs.sizeSlug; innerHTML = `<figure class="wp-block-image"><img src="${imgEl.attrs.src}" alt="${imgEl.attrs.alt || ''}"/></figure>`; break; } case 'button': { const btnEl = element as { attrs: ButtonAttributes; content: string }; if (btnEl.attrs.url) attrs.url = btnEl.attrs.url; if (btnEl.attrs.target) attrs.linkTarget = btnEl.attrs.target; innerHTML = `<div class="wp-block-button"><a class="wp-block-button__link">${btnEl.content}</a></div>`; break; } case 'separator': { // Self-closing block const sepEl = element as { attrs: SeparatorAttributes }; if (sepEl.attrs.style && sepEl.attrs.style !== 'default') { attrs.className = `is-style-${sepEl.attrs.style}`; } break; } case 'spacer': { const spacerEl = element as { attrs: SpacerAttributes }; attrs.height = spacerEl.attrs.height; break; } case 'html': { const htmlEl = element as { attrs: { html: string } }; innerHTML = htmlEl.attrs.html || ''; break; } case 'code': { const codeEl = element as { content: string }; innerHTML = `<pre class="wp-block-code"><code>${codeEl.content}</code></pre>`; break; } case 'list': { const listEl = element as { attrs: ListAttributes; content: string }; if (listEl.attrs.ordered) attrs.ordered = true; innerHTML = listEl.content; break; } case 'quote': { const quoteEl = element as { attrs: QuoteAttributes; content: string }; if (quoteEl.attrs.citation) attrs.citation = quoteEl.attrs.citation; innerHTML = `<blockquote class="wp-block-quote">${quoteEl.content}</blockquote>`; break; } case 'row': case 'column': case 'group': case 'section': case 'buttons': // Container blocks - innerHTML comes from inner blocks break; default: // Unknown elements become HTML blocks if ('content' in element) { innerHTML = (element as { content: string }).content; } } return { blockName, attrs, innerBlocks, innerHTML, innerContent: innerHTML ? [innerHTML] : [], }; } // --------------------------------------------------------------------------- // Helpers // --------------------------------------------------------------------------- /** * Extract text content from HTML */ private extractTextContent(html: string): string { // Simple HTML tag removal return html.replace(/<[^>]+>/g, '').trim(); } /** * Extract image src from innerHTML */ private extractImageSrc(html: string): string { const match = html.match(/src="([^"]+)"/); return match ? match[1] : ''; } /** * Count total elements including nested */ private countElements(elements: LayoutElement[]): number { let count = 0; for (const el of elements) { count++; if (el.children) { count += this.countElements(el.children); } } return count; } } /** * Singleton instance of GutenbergAdapter */ export const gutenbergAdapter = new GutenbergAdapter();