Upload app.py

app.py

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+"""
+Design System Extractor v2 — Main Application
+==============================================
+
+A semi-automated, human-in-the-loop agentic system that reverse-engineers
+design systems from live websites.
+
+Usage:
+    python app.py
+"""
+
+import os
+import asyncio
+import gradio as gr
+from datetime import datetime
+
+# Get HF token from environment if available
+HF_TOKEN_FROM_ENV = os.getenv("HF_TOKEN", "")
+
+# =============================================================================
+# GLOBAL STATE
+# =============================================================================
+
+current_extraction: dict = {}
+user_hf_token: str = ""
+
+
+# =============================================================================
+# HF TOKEN MANAGEMENT
+# =============================================================================
+
+def set_hf_token(token: str) -> str:
+    """Set the HF token globally."""
+    global user_hf_token
+    
+    if not token or len(token) < 10:
+        return "❌ Please enter a valid HuggingFace token"
+    
+    user_hf_token = token.strip()
+    os.environ["HF_TOKEN"] = user_hf_token
+    
+    return "✅ Token saved! You can now use the extractor."
+
+
+# =============================================================================
+# LAZY IMPORTS (avoid circular imports at startup)
+# =============================================================================
+
+_crawler_module = None
+_extractor_module = None
+_schema_module = None
+
+def get_crawler():
+    global _crawler_module
+    if _crawler_module is None:
+        from agents import crawler as _crawler_module
+    return _crawler_module
+
+def get_extractor():
+    global _extractor_module
+    if _extractor_module is None:
+        from agents import extractor as _extractor_module
+    return _extractor_module
+
+def get_schema():
+    global _schema_module
+    if _schema_module is None:
+        from core import token_schema as _schema_module
+    return _schema_module
+
+
+# =============================================================================
+# STAGE 1: URL INPUT & PAGE DISCOVERY
+# =============================================================================
+
+async def discover_site_pages(url: str, progress=gr.Progress()) -> tuple:
+    """
+    Discover pages from a website URL.
+    
+    Returns tuple of (status_message, pages_dataframe, pages_json)
+    """
+    if not url or not url.startswith(("http://", "https://")):
+        return "❌ Please enter a valid URL starting with http:// or https://", None, None
+    
+    progress(0, desc="Initializing browser...")
+    
+    try:
+        crawler = get_crawler()
+        discoverer = crawler.PageDiscoverer()
+        
+        def update_progress(p):
+            progress(p, desc=f"Discovering pages... ({int(p*100)}%)")
+        
+        pages = await discoverer.discover(url, progress_callback=update_progress)
+        
+        # Format for display
+        pages_data = []
+        for page in pages:
+            pages_data.append({
+                "Select": page.selected,
+                "URL": page.url,
+                "Title": page.title or "(No title)",
+                "Type": page.page_type.value,
+                "Status": "✓" if not page.error else f"⚠ {page.error}",
+            })
+        
+        # Store for later use
+        current_extraction["discovered_pages"] = pages
+        current_extraction["base_url"] = url
+        
+        status = f"✅ Found {len(pages)} pages. Select the pages you want to extract tokens from."
+        
+        return status, pages_data, [p.model_dump() for p in pages]
+        
+    except Exception as e:
+        import traceback
+        return f"❌ Error: {str(e)}\n\n{traceback.format_exc()}", None, None
+
+
+async def start_extraction(pages_selection: list, viewport_choice: str, progress=gr.Progress()) -> tuple:
+    """
+    Start token extraction from selected pages.
+    
+    Returns tuple of (status, colors_data, typography_data, spacing_data)
+    """
+    if not pages_selection:
+        return "❌ Please select at least one page", None, None, None
+    
+    # Get selected URLs
+    selected_urls = []
+    for row in pages_selection:
+        if row.get("Select", False):
+            selected_urls.append(row["URL"])
+    
+    if not selected_urls:
+        return "❌ Please select at least one page using the checkboxes", None, None, None
+    
+    # Determine viewport
+    schema = get_schema()
+    viewport = schema.Viewport.DESKTOP if viewport_choice == "Desktop (1440px)" else schema.Viewport.MOBILE
+    
+    progress(0, desc=f"Starting {viewport.value} extraction...")
+    
+    try:
+        extractor_mod = get_extractor()
+        extractor = extractor_mod.TokenExtractor(viewport=viewport)
+        
+        def update_progress(p):
+            progress(p, desc=f"Extracting tokens... ({int(p*100)}%)")
+        
+        result = await extractor.extract(selected_urls, progress_callback=update_progress)
+        
+        # Store result
+        current_extraction[f"{viewport.value}_tokens"] = result
+        
+        # Format colors for display
+        colors_data = []
+        for color in sorted(result.colors, key=lambda c: -c.frequency)[:50]:
+            colors_data.append({
+                "Accept": True,
+                "Color": color.value,
+                "Frequency": color.frequency,
+                "Context": ", ".join(color.contexts[:3]),
+                "Contrast (White)": f"{color.contrast_white}:1",
+                "AA Text": "✓" if color.wcag_aa_small_text else "✗",
+                "Confidence": color.confidence.value,
+            })
+        
+        # Format typography for display
+        typography_data = []
+        for typo in sorted(result.typography, key=lambda t: -t.frequency)[:30]:
+            typography_data.append({
+                "Accept": True,
+                "Font": typo.font_family,
+                "Size": typo.font_size,
+                "Weight": typo.font_weight,
+                "Line Height": typo.line_height,
+                "Elements": ", ".join(typo.elements[:3]),
+                "Frequency": typo.frequency,
+            })
+        
+        # Format spacing for display
+        spacing_data = []
+        for space in sorted(result.spacing, key=lambda s: s.value_px)[:20]:
+            spacing_data.append({
+                "Accept": True,
+                "Value": space.value,
+                "Frequency": space.frequency,
+                "Context": ", ".join(space.contexts[:2]),
+                "Fits 8px": "✓" if space.fits_base_8 else "",
+                "Outlier": "⚠" if space.is_outlier else "",
+            })
+        
+        # Summary
+        status = f"""✅ Extraction Complete ({viewport.value})
+        
+**Summary:**
+- Pages crawled: {len(result.pages_crawled)}
+- Colors found: {len(result.colors)}
+- Typography styles: {len(result.typography)}
+- Spacing values: {len(result.spacing)}
+- Font families: {len(result.font_families)}
+- Detected spacing base: {result.spacing_base or 'Unknown'}px
+- Duration: {result.extraction_duration_ms}ms
+"""
+        
+        if result.warnings:
+            status += f"\n⚠️ Warnings: {len(result.warnings)}"
+        if result.errors:
+            status += f"\n❌ Errors: {len(result.errors)}"
+        
+        return status, colors_data, typography_data, spacing_data
+        
+    except Exception as e:
+        import traceback
+        return f"❌ Extraction failed: {str(e)}\n\n{traceback.format_exc()}", None, None, None
+
+
+def export_tokens_json():
+    """Export current tokens to JSON."""
+    import json
+    
+    result = {}
+    
+    if "desktop_tokens" in current_extraction:
+        desktop = current_extraction["desktop_tokens"]
+        result["desktop"] = {
+            "colors": [c.model_dump() for c in desktop.colors],
+            "typography": [t.model_dump() for t in desktop.typography],
+            "spacing": [s.model_dump() for s in desktop.spacing],
+            "metadata": desktop.summary(),
+        }
+    
+    if "mobile_tokens" in current_extraction:
+        mobile = current_extraction["mobile_tokens"]
+        result["mobile"] = {
+            "colors": [c.model_dump() for c in mobile.colors],
+            "typography": [t.model_dump() for t in mobile.typography],
+            "spacing": [s.model_dump() for s in mobile.spacing],
+            "metadata": mobile.summary(),
+        }
+    
+    if not result:
+        return '{"error": "No tokens extracted yet. Please run extraction first."}'
+    
+    return json.dumps(result, indent=2, default=str)
+
+
+# =============================================================================
+# UI BUILDING
+# =============================================================================
+
+def create_ui():
+    """Create the Gradio interface."""
+    
+    with gr.Blocks(
+        title="Design System Extractor v2",
+        theme=gr.themes.Soft(),
+    ) as app:
+        
+        # Header
+        gr.Markdown("""
+        # 🎨 Design System Extractor v2
+        
+        **Reverse-engineer design systems from live websites.**
+        
+        Extract colors, typography, and spacing tokens from any website and export to Figma-compatible JSON.
+        
+        ---
+        """)
+        
+        # =================================================================
+        # CONFIGURATION SECTION
+        # =================================================================
+        
+        with gr.Accordion("⚙️ Configuration", open=not bool(HF_TOKEN_FROM_ENV)):
+            
+            gr.Markdown("""
+            **HuggingFace Token** is required for AI-powered features (Agent 2-4).
+            Get your token at: [huggingface.co/settings/tokens](https://huggingface.co/settings/tokens)
+            
+            *Note: Basic extraction (Agent 1) works without a token.*
+            """)
+            
+            with gr.Row():
+                hf_token_input = gr.Textbox(
+                    label="HuggingFace Token",
+                    placeholder="hf_xxxxxxxxxxxxxxxxxxxx",
+                    type="password",
+                    scale=4,
+                    value=HF_TOKEN_FROM_ENV if HF_TOKEN_FROM_ENV else "",
+                )
+                save_token_btn = gr.Button("💾 Save Token", scale=1)
+            
+            token_status = gr.Markdown(
+                "✅ Token loaded from environment" if HF_TOKEN_FROM_ENV else "⏳ Enter your HF token to enable all features"
+            )
+            
+            save_token_btn.click(
+                fn=set_hf_token,
+                inputs=[hf_token_input],
+                outputs=[token_status],
+            )
+        
+        # =================================================================
+        # STAGE 1: URL Input & Discovery
+        # =================================================================
+        
+        with gr.Accordion("📍 Stage 1: Website Discovery", open=True):
+            
+            gr.Markdown("""
+            **Step 1:** Enter your website URL and discover pages.
+            The system will automatically find and classify pages for extraction.
+            """)
+            
+            with gr.Row():
+                url_input = gr.Textbox(
+                    label="Website URL",
+                    placeholder="https://example.com",
+                    scale=4,
+                )
+                discover_btn = gr.Button("🔍 Discover Pages", variant="primary", scale=1)
+            
+            discovery_status = gr.Markdown("")
+            
+            pages_table = gr.Dataframe(
+                headers=["Select", "URL", "Title", "Type", "Status"],
+                datatype=["bool", "str", "str", "str", "str"],
+                interactive=True,
+                label="Discovered Pages",
+                visible=False,
+            )
+            
+            pages_json = gr.JSON(visible=False)
+        
+        # =================================================================
+        # STAGE 2: Extraction
+        # =================================================================
+        
+        with gr.Accordion("🔬 Stage 2: Token Extraction", open=False):
+            
+            gr.Markdown("""
+            **Step 2:** Select pages and viewport, then extract design tokens.
+            """)
+            
+            with gr.Row():
+                viewport_radio = gr.Radio(
+                    choices=["Desktop (1440px)", "Mobile (375px)"],
+                    value="Desktop (1440px)",
+                    label="Viewport",
+                )
+                extract_btn = gr.Button("🚀 Extract Tokens", variant="primary")
+            
+            extraction_status = gr.Markdown("")
+            
+            with gr.Tabs():
+                with gr.Tab("🎨 Colors"):
+                    colors_table = gr.Dataframe(
+                        headers=["Accept", "Color", "Frequency", "Context", "Contrast (White)", "AA Text", "Confidence"],
+                        datatype=["bool", "str", "number", "str", "str", "str", "str"],
+                        interactive=True,
+                        label="Extracted Colors",
+                    )
+                
+                with gr.Tab("📝 Typography"):
+                    typography_table = gr.Dataframe(
+                        headers=["Accept", "Font", "Size", "Weight", "Line Height", "Elements", "Frequency"],
+                        datatype=["bool", "str", "str", "number", "str", "str", "number"],
+                        interactive=True,
+                        label="Extracted Typography",
+                    )
+                
+                with gr.Tab("📏 Spacing"):
+                    spacing_table = gr.Dataframe(
+                        headers=["Accept", "Value", "Frequency", "Context", "Fits 8px", "Outlier"],
+                        datatype=["bool", "str", "number", "str", "str", "str"],
+                        interactive=True,
+                        label="Extracted Spacing",
+                    )
+        
+        # =================================================================
+        # STAGE 3: Export
+        # =================================================================
+        
+        with gr.Accordion("📦 Stage 3: Export", open=False):
+            
+            gr.Markdown("""
+            **Step 3:** Review and export your design tokens.
+            """)
+            
+            with gr.Row():
+                export_btn = gr.Button("📥 Export JSON", variant="secondary")
+                
+            export_output = gr.Code(
+                label="Exported Tokens (JSON)",
+                language="json",
+                lines=20,
+            )
+        
+        # =================================================================
+        # EVENT HANDLERS
+        # =================================================================
+        
+        # Discovery
+        discover_btn.click(
+            fn=discover_site_pages,
+            inputs=[url_input],
+            outputs=[discovery_status, pages_table, pages_json],
+        ).then(
+            fn=lambda: gr.update(visible=True),
+            outputs=[pages_table],
+        )
+        
+        # Extraction
+        extract_btn.click(
+            fn=start_extraction,
+            inputs=[pages_table, viewport_radio],
+            outputs=[extraction_status, colors_table, typography_table, spacing_table],
+        )
+        
+        # Export
+        export_btn.click(
+            fn=export_tokens_json,
+            outputs=[export_output],
+        )
+        
+        # =================================================================
+        # FOOTER
+        # =================================================================
+        
+        gr.Markdown("""
+        ---
+        
+        **Design System Extractor v2** | Built with LangGraph + Gradio + HuggingFace
+        
+        *A semi-automated co-pilot for design system recovery and modernization.*
+        
+        **Models:** Microsoft Phi (Normalizer) • Meta Llama (Advisor) • Mistral Codestral (Generator)
+        """)
+    
+    return app
+
+
+# =============================================================================
+# MAIN
+# =============================================================================
+
+if __name__ == "__main__":
+    app = create_ui()
+    app.launch(
+        server_name="0.0.0.0",
+        server_port=7860,
+    )