Create app.py

app.py

@@ -0,0 +1,156 @@
+import gradio as gr
+import json
+from graphviz import Digraph
+import os
+from typing import Dict, Any
+
+def generate_concept_map(json_input: str) -> str:
+    """
+    Generates a concept map from structured JSON
+    
+    Args:
+        json_input (str): JSON describing the concept map structure.
+            Required format:
+            {
+                "central_node": "Main concept",
+                "nodes": [
+                    {
+                        "id": "unique_identifier",
+                        "label": "Node label",
+                        "relationship": "Relationship to parent",
+                        "subnodes": [...]  # Optional
+                    }
+                ]
+            }
+    
+    Returns:
+        str: Image URL (compatible with Hugging Face Spaces)
+    
+    Raises:
+        ValueError: If JSON doesn't meet required format
+    """
+    try:
+        # Validate input
+        if not json_input.strip():
+            return "Error: Empty input"
+            
+        data = json.loads(json_input)
+        
+        # Validate basic structure
+        if 'central_node' not in data or 'nodes' not in data:
+            raise ValueError("Missing required fields: central_node or nodes")
+
+        # Create graph
+        dot = Digraph(
+            name='ConceptMap',
+            format='png',
+            graph_attr={
+                'rankdir': 'TB',
+                'splines': 'ortho',
+                'bgcolor': 'transparent'
+            }
+        )
+        
+        # Central node
+        dot.node(
+            'central',
+            data['central_node'],
+            shape='ellipse',
+            style='filled',
+            fillcolor='#2196F3',
+            fontcolor='white',
+            fontsize='14'
+        )
+        
+        # Process nodes
+        for node in data['nodes']:
+            node_id = node.get('id')
+            label = node.get('label')
+            relationship = node.get('relationship')
+            
+            # Validate node
+            if not all([node_id, label, relationship]):
+                raise ValueError(f"Invalid node: {node}")
+                
+            # Create main node
+            dot.node(
+                node_id,
+                label,
+                shape='box',
+                style='filled',
+                fillcolor='#4CAF50',
+                fontcolor='white',
+                fontsize='12'
+            )
+            
+            # Connect to central node
+            dot.edge(
+                'central',
+                node_id,
+                label=relationship,
+                color='#9C27B0',
+                fontsize='10'
+            )
+            
+            # Process subnodes
+            for subnode in node.get('subnodes', []):
+                sub_id = subnode.get('id')
+                sub_label = subnode.get('label')
+                sub_rel = subnode.get('relationship')
+                
+                if not all([sub_id, sub_label, sub_rel]):
+                    raise ValueError(f"Invalid subnode: {subnode}")
+                    
+                dot.node(
+                    sub_id,
+                    sub_label,
+                    shape='diamond',
+                    style='filled',
+                    fillcolor='#FF5722',
+                    fontcolor='white',
+                    fontsize='10'
+                )
+                
+                dot.edge(
+                    node_id,
+                    sub_id,
+                    label=sub_rel,
+                    color='#E91E63',
+                    fontsize='8'
+                )
+
+        # Save image
+        filename = f"/tmp/concept_map_{hash(json_input)}.gv"
+        dot.render(filename, format='png', cleanup=True)
+        
+        # Return Hugging Face compatible URL
+        return f"/file={filename}.png"
+
+    except json.JSONDecodeError:
+        return "Error: Invalid JSON"
+    except Exception as e:
+        return f"Error: {str(e)}"
+
+if __name__ == "__main__":
+    demo = gr.Interface(
+        fn=generate_concept_map,
+        inputs=gr.Textbox(
+            placeholder="Paste structured JSON here...",
+            label="JSON Input",
+            lines=15
+        ),
+        outputs=gr.Textbox(
+            label="Image URL",
+            placeholder="Concept map URL will be generated here"
+        ),
+        title="Concept Map Generator",
+        description="Create concept maps from JSON (Claude compatible)"
+    )
+    
+    # Hugging Face Spaces configuration
+    demo.launch(
+        mcp_server=True,
+        share=False,
+        server_port=int(os.getenv('PORT', 7860)),
+        server_name="0.0.0.0"
+    )