whyml

API Reference

Overview

WhyML provides both a Python API and a REST API for programmatic access to all functionality. This reference covers all available classes, methods, and endpoints.

Python API

WhyMLProcessor

Main processor class for converting manifests to different formats.

from whyml import WhyMLProcessor

processor = WhyMLProcessor()

Methods

convert_to_html(manifest_path: str, **kwargs) -> ConversionResult

Convert YAML manifest to HTML.

Parameters:

• manifest_path (str): Path to YAML manifest file
• **kwargs: Additional conversion options
  • optimize_output (bool): Minify HTML output
  • include_meta_tags (bool): Include SEO meta tags
  • responsive_design (bool): Include responsive viewport

Returns: ConversionResult object

Example:

result = await processor.convert_to_html('manifest.yaml', optimize_output=True)
result.save_to_file('output.html')

convert_to_react(manifest_path: str, **kwargs) -> ConversionResult

Convert YAML manifest to React component.

Parameters:

• manifest_path (str): Path to YAML manifest file
• **kwargs: Additional options
  • use_typescript (bool): Generate TypeScript component
  • use_hooks (bool): Use React hooks
  • css_modules (bool): Use CSS modules

Example:

result = await processor.convert_to_react(
    'manifest.yaml',
    use_typescript=True,
    css_modules=True
)

convert_to_vue(manifest_path: str, **kwargs) -> ConversionResult

Convert YAML manifest to Vue component.

Parameters:

• manifest_path (str): Path to YAML manifest file
• **kwargs: Additional options
  • composition_api (bool): Use Composition API
  • typescript (bool): Use TypeScript
  • scoped_styles (bool): Use scoped CSS

convert_to_php(manifest_path: str, **kwargs) -> ConversionResult

Convert YAML manifest to PHP component.

Parameters:

• manifest_path (str): Path to YAML manifest file
• **kwargs: Additional options
  • namespace (str): PHP namespace
  • use_type_declarations (bool): Use PHP type hints

scrape_url_to_manifest(url: str, **kwargs) -> dict

Scrape URL and convert to YAML manifest.

Parameters:

• url (str): URL to scrape
• **kwargs: Scraping options
  • max_depth (int): Maximum nesting depth
  • simplify_structure (bool): Simplify HTML structure
  • sections (list): Sections to extract

ManifestLoader

Load and process YAML manifests with inheritance support.

from whyml import ManifestLoader

loader = ManifestLoader()

Methods

load_manifest(path: str) -> dict

Load YAML manifest from file or URL.

Parameters:

• path (str): Path to manifest file or URL

Returns: Parsed manifest dictionary

Example:

async with loader:
    manifest = await loader.load_manifest('manifest.yaml')

resolve_dependencies(manifest: dict) -> dict

Resolve template inheritance and dependencies.

Parameters:

• manifest (dict): Loaded manifest

Returns: Resolved manifest with all dependencies

URLScraper

Advanced web scraping with structure analysis.

from whyml.scrapers import URLScraper

scraper = URLScraper(
    max_depth=5,
    simplify_structure=True,
    preserve_semantic=True
)

Constructor Parameters

• max_depth (int): Maximum HTML nesting depth
• simplify_structure (bool): Enable structure simplification
• flatten_containers (bool): Remove wrapper divs
• preserve_semantic (bool): Preserve semantic HTML elements
• extract_styles (bool): Extract CSS styles
• extract_scripts (bool): Extract JavaScript
• enable_analysis (bool): Enable page analysis

Methods

scrape_url(url: str, **kwargs) -> ScrapingResult

Scrape URL and return structured result.

Parameters:

• url (str): URL to scrape
• **kwargs: Additional options

Returns: ScrapingResult object

Example:

result = await scraper.scrape_url('https://example.com')
manifest = result.to_manifest()

WebpageAnalyzer

Analyze webpage content and structure.

from whyml.scrapers import WebpageAnalyzer

analyzer = WebpageAnalyzer()

Methods

analyze_page(html: str, url: str) -> dict

Analyze HTML content and return metrics.

Parameters:

• html (str): HTML content
• url (str): Page URL

Returns: Analysis dictionary with metrics

Converters

Individual converter classes for each output format.

HTMLConverter

from whyml.converters import HTMLConverter

converter = HTMLConverter(
    doctype="html5",
    include_meta_tags=True,
    responsive_design=True
)

result = converter.convert(manifest)

ReactConverter

from whyml.converters import ReactConverter

converter = ReactConverter(
    use_typescript=True,
    use_hooks=True,
    css_framework="css-modules"
)

result = converter.convert(manifest)

VueConverter

from whyml.converters import VueConverter

converter = VueConverter(
    vue_version=3,
    use_composition_api=True,
    scoped_styles=True
)

result = converter.convert(manifest)

PHPConverter

from whyml.converters import PHPConverter

converter = PHPConverter(
    namespace="App\\Components",
    use_type_declarations=True
)

result = converter.convert(manifest)

ConversionResult

Result object returned by all converters.

Properties

• content (str): Generated code content
• filename (str): Suggested filename
• format_type (str): Output format
• metadata (dict): Conversion metadata

Methods

save_to_file(path: str) -> None

Save content to file.

get_size() -> int

Get content size in bytes.

get_lines() -> int

Get number of lines in content.

REST API

WhyML provides a FastAPI-based REST API for web integration.

Starting the Server

whyml-server --host 0.0.0.0 --port 8000

Base URL

http://localhost:8000

Authentication

Currently no authentication required. API keys coming in future versions.

Endpoints

Health Check

GET /api/health

Check API health status.

Response:

{
  "status": "healthy",
  "version": "1.0.0",
  "timestamp": "2025-01-20T10:30:00Z"
}

Convert Manifest

POST /api/convert

Convert YAML manifest to specified format.

Request Body:

{
  "manifest": "metadata:\n  title: Test\n...",
  "format": "html",
  "options": {
    "optimize_output": true,
    "include_meta_tags": true
  }
}

Parameters:

• manifest (string): YAML manifest content
• format (string): Output format (html, react, vue, php)
• options (object): Format-specific options

Response:

{
  "success": true,
  "content": "<!DOCTYPE html>...",
  "filename": "component.html",
  "metadata": {
    "format": "html",
    "size": 1024,
    "lines": 45
  }
}

Scrape URL

POST /api/scrape

Scrape URL and return YAML manifest.

Request Body:

{
  "url": "https://example.com",
  "options": {
    "max_depth": 5,
    "simplify_structure": true,
    "sections": ["metadata", "structure", "styles"]
  }
}

Response:

{
  "success": true,
  "manifest": "metadata:\n  title: Example\n...",
  "analysis": {
    "page_type": "landing_page",
    "complexity_score": 3,
    "seo_score": 85
  }
}

Validate Manifest

POST /api/validate

Validate YAML manifest structure.

Request Body:

{
  "manifest": "metadata:\n  title: Test\n..."
}

Response:

{
  "valid": true,
  "errors": [],
  "warnings": [
    "Missing description in metadata"
  ]
}

Batch Convert

POST /api/batch-convert

Convert multiple manifests in batch.

Request Body:

{
  "manifests": [
    {
      "name": "page1",
      "content": "metadata:\n  title: Page 1\n..."
    },
    {
      "name": "page2", 
      "content": "metadata:\n  title: Page 2\n..."
    }
  ],
  "format": "html",
  "options": {}
}

Response:

{
  "success": true,
  "results": [
    {
      "name": "page1",
      "content": "<!DOCTYPE html>...",
      "filename": "page1.html"
    },
    {
      "name": "page2",
      "content": "<!DOCTYPE html>...",
      "filename": "page2.html"
    }
  ]
}

Error Responses

All endpoints return errors in this format:

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid manifest structure",
    "details": {
      "line": 5,
      "column": 10,
      "field": "metadata.title"
    }
  }
}

Rate Limiting

• 100 requests per minute per IP
• 1000 requests per hour per IP
• Batch operations count as multiple requests

WebSocket API

Real-time conversion and scraping via WebSocket.

Connect

const ws = new WebSocket('ws://localhost:8000/ws');

Convert Message

{
  "type": "convert",
  "data": {
    "manifest": "...",
    "format": "html"
  }
}

Response Message

{
  "type": "convert_result",
  "data": {
    "content": "...",
    "filename": "..."
  }
}

Error Handling

Exception Classes

from whyml.exceptions import (
    WhyMLError,
    ManifestLoadingError,
    ConversionError,
    ScrapingError,
    ValidationError
)

WhyMLError

Base exception class for all WhyML errors.

ManifestLoadingError

Raised when manifest loading fails.

ConversionError

Raised when format conversion fails.

ScrapingError

Raised when web scraping fails.

ValidationError

Raised when manifest validation fails.

Error Handling Example

try:
    result = await processor.convert_to_html('manifest.yaml')
except ManifestLoadingError as e:
    print(f"Failed to load manifest: {e}")
except ConversionError as e:
    print(f"Conversion failed: {e}")
except WhyMLError as e:
    print(f"WhyML error: {e}")

Configuration

Global Configuration

from whyml import configure

configure(
    default_timeout=30,
    cache_enabled=True,
    cache_dir="~/.whyml/cache",
    log_level="INFO"
)

Environment Variables

• WHYML_CACHE_DIR: Cache directory path
• WHYML_LOG_LEVEL: Logging level
• WHYML_TIMEOUT: Default timeout in seconds
• WHYML_API_KEY: API key for external services

Examples

Complete Workflow Example

import asyncio
from whyml import WhyMLProcessor, URLScraper

async def complete_workflow():
    # Scrape website
    scraper = URLScraper(simplify_structure=True)
    scraping_result = await scraper.scrape_url('https://example.com')
    
    # Save manifest
    manifest_content = scraping_result.to_yaml()
    with open('scraped.yaml', 'w') as f:
        f.write(manifest_content)
    
    # Convert to multiple formats
    processor = WhyMLProcessor()
    
    # HTML
    html_result = await processor.convert_to_html('scraped.yaml')
    html_result.save_to_file('output.html')
    
    # React
    react_result = await processor.convert_to_react(
        'scraped.yaml',
        use_typescript=True
    )
    react_result.save_to_file('Component.tsx')
    
    # Vue
    vue_result = await processor.convert_to_vue(
        'scraped.yaml',
        composition_api=True
    )
    vue_result.save_to_file('Component.vue')

asyncio.run(complete_workflow())

Custom Converter Example

from whyml.converters import BaseConverter

class CustomConverter(BaseConverter):
    @property
    def format_name(self) -> str:
        return "Custom"
    
    @property
    def file_extension(self) -> str:
        return "custom"
    
    def convert(self, manifest: dict, **kwargs):
        # Custom conversion logic
        content = self.generate_custom_format(manifest)
        
        return ConversionResult(
            content=content,
            filename=self.generate_filename(manifest),
            format_type="custom"
        )

Performance Tips

1. Use async/await: All I/O operations are async
2. Cache manifests: Enable caching for repeated operations
3. Batch operations: Use batch APIs for multiple conversions
4. Optimize manifests: Simplify structure for better performance
5. Connection pooling: Reuse HTTP connections for scraping

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