# Copyright (c) 2025 Patrick Motsch
# All rights reserved.
"""
HTML renderer for report generation.
"""
from .rendererBaseTemplate import BaseRenderer
from typing import Dict, Any, Tuple, List
class RendererHtml(BaseRenderer):
"""Renders content to HTML format with format-specific extraction."""
@classmethod
def getSupportedFormats(cls) -> List[str]:
"""Return supported HTML formats."""
return ['html', 'htm']
@classmethod
def getFormatAliases(cls) -> List[str]:
"""Return format aliases."""
return ['web', 'webpage']
@classmethod
def getPriority(cls) -> int:
"""Return priority for HTML renderer."""
return 100
async def render(self, extractedContent: Dict[str, Any], title: str, userPrompt: str = None, aiService=None) -> Tuple[str, str]:
"""Render extracted JSON content to HTML format using AI-analyzed styling."""
try:
# Extract images first
images = self._extractImages(extractedContent)
# Store images in instance for later retrieval
self._renderedImages = images
# Generate HTML using AI-analyzed styling
htmlContent = await self._generateHtmlFromJson(extractedContent, title, userPrompt, aiService)
# Replace base64 data URIs with relative file paths if images exist
if images:
htmlContent = self._replaceImageDataUris(htmlContent, images)
return htmlContent, "text/html"
except Exception as e:
self.logger.error(f"Error rendering HTML: {str(e)}")
# Return minimal HTML fallback
self._renderedImages = [] # Initialize empty list on error
return f"{title}
{title}
Error rendering report: {str(e)}
", "text/html"
async def _generateHtmlFromJson(self, jsonContent: Dict[str, Any], title: str, userPrompt: str = None, aiService=None) -> str:
"""Generate HTML content from structured JSON document using AI-generated styling."""
try:
# Get style set: default styles, enhanced with AI if userPrompt provided
styles = await self._getStyleSet(userPrompt, aiService)
# Validate JSON structure
if not self._validateJsonStructure(jsonContent):
raise ValueError("JSON content must follow standardized schema: {metadata: {...}, documents: [{sections: [...]}]}")
# Extract sections and metadata from standardized schema
sections = self._extractSections(jsonContent)
metadata = self._extractMetadata(jsonContent)
# Use title from JSON metadata if available, otherwise use provided title
documentTitle = metadata.get("title", title)
# Build HTML document
htmlParts = []
# HTML document structure
htmlParts.append('')
htmlParts.append('')
htmlParts.append('')
htmlParts.append('')
htmlParts.append('')
htmlParts.append(f'{documentTitle}')
htmlParts.append('')
htmlParts.append('')
htmlParts.append('')
# Document header
htmlParts.append(f'
{documentTitle}
')
# Main content
htmlParts.append('')
# Process each section
for section in sections:
sectionHtml = self._renderJsonSection(section, styles)
if sectionHtml:
htmlParts.append(sectionHtml)
htmlParts.append('')
# Footer
htmlParts.append('')
htmlParts.append('')
htmlParts.append('')
return '\n'.join(htmlParts)
except Exception as e:
self.logger.error(f"Error generating HTML from JSON: {str(e)}")
raise Exception(f"HTML generation failed: {str(e)}")
async def _getStyleSet(self, userPrompt: str = None, aiService=None, templateName: str = None) -> Dict[str, Any]:
"""Get style set - default styles, enhanced with AI if userPrompt provided.
Args:
userPrompt: User's prompt (AI will detect style instructions in any language)
aiService: AI service (used only if userPrompt provided)
templateName: Name of template style set (None = default)
Returns:
Dict with style definitions for all document styles
"""
# Get default style set
defaultStyleSet = self._getDefaultStyleSet()
# Enhance with AI if userPrompt provided (AI handles multilingual style detection)
if userPrompt and aiService:
# AI will naturally detect style instructions in any language
self.logger.info(f"Enhancing styles with AI based on user prompt...")
enhancedStyleSet = await self._enhanceStylesWithAI(userPrompt, defaultStyleSet, aiService)
return self._validateStylesContrast(enhancedStyleSet)
else:
# Use default styles only
return defaultStyleSet
async def _enhanceStylesWithAI(self, userPrompt: str, defaultStyleSet: Dict[str, Any], aiService) -> Dict[str, Any]:
"""Enhance default styles with AI based on user prompt."""
try:
style_template = self._createAiStyleTemplate("html", userPrompt, defaultStyleSet)
enhanced_styles = await self._getAiStyles(aiService, style_template, defaultStyleSet)
return enhanced_styles
except Exception as e:
self.logger.warning(f"AI style enhancement failed: {str(e)}, using default styles")
return defaultStyleSet
def _validateStylesContrast(self, styles: Dict[str, Any]) -> Dict[str, Any]:
"""Validate and fix contrast issues in AI-generated styles."""
try:
# Fix table header contrast
if "table_header" in styles:
header = styles["table_header"]
bgColor = header.get("background", "#FFFFFF")
textColor = header.get("color", "#000000")
# If both are white or both are dark, fix it
if bgColor.upper() == "#FFFFFF" and textColor.upper() == "#FFFFFF":
header["background"] = "#4F4F4F"
header["color"] = "#FFFFFF"
elif bgColor.upper() == "#000000" and textColor.upper() == "#000000":
header["background"] = "#4F4F4F"
header["color"] = "#FFFFFF"
# Fix table cell contrast
if "table_cell" in styles:
cell = styles["table_cell"]
bgColor = cell.get("background", "#FFFFFF")
textColor = cell.get("color", "#000000")
# If both are white or both are dark, fix it
if bgColor.upper() == "#FFFFFF" and textColor.upper() == "#FFFFFF":
cell["background"] = "#FFFFFF"
cell["color"] = "#2F2F2F"
elif bgColor.upper() == "#000000" and textColor.upper() == "#000000":
cell["background"] = "#FFFFFF"
cell["color"] = "#2F2F2F"
return styles
except Exception as e:
self.logger.warning(f"Style validation failed: {str(e)}")
return self._getDefaultStyleSet()
def _getDefaultStyleSet(self) -> Dict[str, Any]:
"""Default HTML style set - used when no style instructions present."""
return {
"title": {"font_size": "2.5em", "color": "#1F4E79", "font_weight": "bold", "text_align": "center", "margin": "0 0 1em 0"},
"heading1": {"font_size": "2em", "color": "#2F2F2F", "font_weight": "bold", "text_align": "left", "margin": "1.5em 0 0.5em 0"},
"heading2": {"font_size": "1.5em", "color": "#4F4F4F", "font_weight": "bold", "text_align": "left", "margin": "1em 0 0.5em 0"},
"paragraph": {"font_size": "1em", "color": "#2F2F2F", "font_weight": "normal", "text_align": "left", "margin": "0 0 1em 0", "line_height": "1.6"},
"table": {"border": "1px solid #ddd", "border_collapse": "collapse", "width": "100%", "margin": "1em 0"},
"table_header": {"background": "#4F4F4F", "color": "#FFFFFF", "font_weight": "bold", "text_align": "center", "padding": "12px"},
"table_cell": {"background": "#FFFFFF", "color": "#2F2F2F", "font_weight": "normal", "text_align": "left", "padding": "8px", "border": "1px solid #ddd"},
"bullet_list": {"font_size": "1em", "color": "#2F2F2F", "margin": "0 0 1em 0", "padding_left": "20px"},
"code_block": {"font_family": "Courier New, monospace", "font_size": "0.9em", "color": "#2F2F2F", "background": "#F5F5F5", "padding": "1em", "border": "1px solid #ddd", "border_radius": "4px", "margin": "1em 0"},
"image": {"max_width": "100%", "height": "auto", "margin": "1em 0", "border_radius": "4px"},
"body": {"font_family": "Arial, sans-serif", "background": "#FFFFFF", "color": "#2F2F2F", "margin": "0", "padding": "20px"}
}
def _generateCssStyles(self, styles: Dict[str, Any]) -> str:
"""Generate CSS from style definitions."""
css_parts = []
# Body styles
body_style = styles.get("body", {})
css_parts.append("body {")
for property_name, value in body_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Document title
title_style = styles.get("title", {})
css_parts.append(".document-title {")
for property_name, value in title_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Headings
for heading_level in ["heading1", "heading2"]:
heading_style = styles.get(heading_level, {})
css_class = f"h{heading_level[-1]}"
css_parts.append(f"{css_class} {{")
for property_name, value in heading_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Paragraphs
paragraph_style = styles.get("paragraph", {})
css_parts.append("p {")
for property_name, value in paragraph_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Tables
table_style = styles.get("table", {})
css_parts.append("table {")
for property_name, value in table_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Table headers
table_header_style = styles.get("table_header", {})
css_parts.append("th {")
for property_name, value in table_header_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Table cells
table_cell_style = styles.get("table_cell", {})
css_parts.append("td {")
for property_name, value in table_cell_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Lists
bullet_list_style = styles.get("bullet_list", {})
css_parts.append("ul {")
for property_name, value in bullet_list_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Code blocks
code_block_style = styles.get("code_block", {})
css_parts.append("pre {")
for property_name, value in code_block_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Images
image_style = styles.get("image", {})
css_parts.append("img {")
for property_name, value in image_style.items():
css_property = property_name.replace("_", "-")
css_parts.append(f" {css_property}: {value};")
css_parts.append("}")
# Generated info
css_parts.append(".generated-info {")
css_parts.append(" font-size: 0.9em;")
css_parts.append(" color: #666;")
css_parts.append(" text-align: center;")
css_parts.append(" margin-top: 2em;")
css_parts.append(" padding-top: 1em;")
css_parts.append(" border-top: 1px solid #ddd;")
css_parts.append("}")
return '\n'.join(css_parts)
def _renderJsonSection(self, section: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a single JSON section to HTML using AI-generated styles."""
try:
sectionType = self._getSectionType(section)
sectionData = self._getSectionData(section)
if sectionType == "table":
# Process the section data to extract table structure
processedData = self._processSectionByType(section)
return self._renderJsonTable(processedData, styles)
elif sectionType == "bullet_list":
# Process the section data to extract bullet list structure
processedData = self._processSectionByType(section)
return self._renderJsonBulletList(processedData, styles)
elif sectionType == "heading":
return self._renderJsonHeading(sectionData, styles)
elif sectionType == "paragraph":
return self._renderJsonParagraph(sectionData, styles)
elif sectionType == "code_block":
# Process the section data to extract code block structure
processedData = self._processSectionByType(section)
return self._renderJsonCodeBlock(processedData, styles)
elif sectionType == "image":
# Process the section data to extract image structure
processedData = self._processSectionByType(section)
return self._renderJsonImage(processedData, styles)
else:
# Fallback to paragraph for unknown types
return self._renderJsonParagraph(sectionData, styles)
except Exception as e:
self.logger.warning(f"Error rendering section {self._getSectionId(section)}: {str(e)}")
return f'
[Error rendering section: {str(e)}]
'
def _renderJsonTable(self, tableData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON table to HTML using AI-generated styles."""
try:
headers = tableData.get("headers", [])
rows = tableData.get("rows", [])
if not headers or not rows:
return ""
htmlParts = ['
']
# Table header
htmlParts.append('
')
for header in headers:
htmlParts.append(f'
{header}
')
htmlParts.append('
')
# Table body
htmlParts.append('')
for row in rows:
htmlParts.append('
')
for cellData in row:
htmlParts.append(f'
{cellData}
')
htmlParts.append('
')
htmlParts.append('')
htmlParts.append('
')
return '\n'.join(htmlParts)
except Exception as e:
self.logger.warning(f"Error rendering table: {str(e)}")
return ""
def _renderJsonBulletList(self, listData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON bullet list to HTML using AI-generated styles."""
try:
items = listData.get("items", [])
if not items:
return ""
htmlParts = ['
']
for item in items:
if isinstance(item, str):
htmlParts.append(f'
{item}
')
elif isinstance(item, dict) and "text" in item:
htmlParts.append(f'
{item["text"]}
')
htmlParts.append('
')
return '\n'.join(htmlParts)
except Exception as e:
self.logger.warning(f"Error rendering bullet list: {str(e)}")
return ""
def _renderJsonHeading(self, headingData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON heading to HTML using AI-generated styles."""
try:
# Normalize inputs - headingData is typically a list of elements from _getSectionData
if isinstance(headingData, list):
# Extract first element from elements array
if headingData and len(headingData) > 0:
headingData = headingData[0] if isinstance(headingData[0], dict) else {}
else:
return ""
elif isinstance(headingData, str):
headingData = {"text": headingData, "level": 2}
elif not isinstance(headingData, dict):
return ""
level = headingData.get("level", 1)
text = headingData.get("text", "")
if text:
level = max(1, min(6, level))
return f'{text}'
return ""
except Exception as e:
self.logger.warning(f"Error rendering heading: {str(e)}")
return ""
def _renderJsonParagraph(self, paragraphData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON paragraph to HTML using AI-generated styles."""
try:
# Normalize inputs - paragraphData is typically a list of elements from _getSectionData
if isinstance(paragraphData, list):
# Extract text from all paragraph elements
texts = []
for el in paragraphData:
if isinstance(el, dict) and "text" in el:
texts.append(el["text"])
elif isinstance(el, str):
texts.append(el)
if texts:
# Join multiple paragraphs with
tags
return '\n'.join(f'
{text}
' for text in texts)
return ""
elif isinstance(paragraphData, str):
return f'
{paragraphData}
'
elif isinstance(paragraphData, dict):
text = paragraphData.get("text", "")
if text:
return f'
{text}
'
return ""
else:
return ""
except Exception as e:
self.logger.warning(f"Error rendering paragraph: {str(e)}")
return ""
def _renderJsonCodeBlock(self, codeData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON code block to HTML using AI-generated styles."""
try:
code = codeData.get("code", "")
language = codeData.get("language", "")
if code:
if language:
return f'
{code}
'
else:
return f'
{code}
'
return ""
except Exception as e:
self.logger.warning(f"Error rendering code block: {str(e)}")
return ""
def _renderJsonImage(self, imageData: Dict[str, Any], styles: Dict[str, Any]) -> str:
"""Render a JSON image to HTML with placeholder for later replacement."""
try:
base64Data = imageData.get("base64Data", "")
altText = imageData.get("altText", "Image")
caption = imageData.get("caption", "")
if base64Data:
# Use data URI as placeholder - will be replaced with file path in _replaceImageDataUris
# Include a marker so we can find and replace it
imageMarker = f""
imgTag = f''
if caption:
return f'{imageMarker}{imgTag}{caption}'
else:
return f'{imageMarker}{imgTag}'
return ""
except Exception as e:
self.logger.warning(f"Error rendering image: {str(e)}")
return f'
[Image: {imageData.get("altText", "Image")}]
'
def _extractImages(self, jsonContent: Dict[str, Any]) -> List[Dict[str, Any]]:
"""
Extract all images from JSON structure.
Returns:
List of image data dictionaries with base64Data, altText, caption, sectionId
"""
images = []
try:
# Extract from standardized schema: {metadata: {...}, documents: [{sections: [...]}]}
documents = jsonContent.get("documents", [])
if not documents or not isinstance(documents, list):
return images
for doc in documents:
if not isinstance(doc, dict):
continue
sections = doc.get("sections", [])
for section in sections:
if section.get("content_type") == "image":
elements = section.get("elements", [])
for element in elements:
base64Data = element.get("base64Data", "")
# If base64Data not found, try extracting from url data URI
if not base64Data:
url = element.get("url", "")
if url.startswith("data:image/"):
# Extract base64 from data URI: data:image/png;base64,
import re
match = re.match(r'data:image/[^;]+;base64,(.+)', url)
if match:
base64Data = match.group(1)
if base64Data:
sectionId = section.get("id", "unknown")
# Generate filename from section ID
filename = f"{sectionId}.png"
# Clean filename (remove invalid characters)
filename = "".join(c if c.isalnum() or c in "._-" else "_" for c in filename)
images.append({
"base64Data": base64Data,
"altText": element.get("altText", "Image"),
"caption": element.get("caption"),
"sectionId": sectionId,
"filename": filename
})
self.logger.debug(f"Extracted image from section {sectionId}: {filename}")
self.logger.info(f"Extracted {len(images)} image(s) from JSON structure")
return images
except Exception as e:
self.logger.warning(f"Error extracting images: {str(e)}")
return []
def _replaceImageDataUris(self, htmlContent: str, images: List[Dict[str, Any]]) -> str:
"""
Replace base64 data URIs in HTML with relative file paths.
Args:
htmlContent: HTML content with data URIs
images: List of image data dictionaries
Returns:
HTML content with relative file paths
"""
try:
import base64
import re
# Find all image data URIs in HTML
dataUriPattern = r'data:image/png;base64,([A-Za-z0-9+/=]+)'
def replaceDataUri(match):
base64Data = match.group(1)
# Find matching image in images list
matchingImage = None
for img in images:
if img["base64Data"] == base64Data or img["base64Data"].startswith(base64Data[:100]):
matchingImage = img
break
if matchingImage:
# Use filename from image data (generated from section ID)
filename = matchingImage.get("filename", f"image_{images.index(matchingImage) + 1}.png")
# Replace with relative path
altText = matchingImage.get("altText", "Image")
caption = matchingImage.get("caption", "")
if caption:
return f'{caption}'
else:
return f''
else:
# Keep original if no match found
return match.group(0)
# Replace all data URIs
updatedHtml = re.sub(dataUriPattern, replaceDataUri, htmlContent)
return updatedHtml
except Exception as e:
self.logger.warning(f"Error replacing image data URIs: {str(e)}")
return htmlContent # Return original if replacement fails
def getRenderedImages(self) -> List[Dict[str, Any]]:
"""
Get images that were extracted during rendering.
Returns list of image dicts with base64Data, altText, caption, and filename.
"""
if not hasattr(self, '_renderedImages'):
return []
return self._renderedImages
'
if caption:
return f'{imageMarker}