File size: 2,377 Bytes
8f78956 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 |
import graphviz
import json
from tempfile import NamedTemporaryFile
import os
from graph_generator_utils import add_nodes_and_edges
def generate_radial_diagram(json_input: str) -> str:
"""
Generates a radial (center-expanded) diagram from JSON input.
"""
try:
if not json_input.strip():
return "Error: Empty input"
data = json.loads(json_input)
if 'central_node' not in data or 'nodes' not in data:
raise ValueError("Missing required fields: central_node or nodes")
dot = graphviz.Digraph(
name='RadialDiagram',
format='png',
engine='neato', # Use 'neato' or 'fdp' for radial/force-directed layout
graph_attr={
'overlap': 'false', # Prevent node overlap
'splines': 'true', # Smooth splines for edges
'bgcolor': 'white', # White background
'pad': '0.5', # Padding around the graph
'layout': 'neato' # Explicitly set layout engine for consistency
},
node_attr={
'fixedsize': 'false' # Allow nodes to resize based on content
}
)
base_color = '#19191a' # Base color for the central node and gradient
# Central node styling (rounded box, dark color)
dot.node(
'central',
data['central_node'],
shape='box', # Rectangular shape
style='filled,rounded', # Filled and rounded corners
fillcolor=base_color, # Darkest color
fontcolor='white', # White text for dark background
fontsize='16' # Larger font for central node
)
# Add child nodes and edges recursively starting from depth 1
# The add_nodes_and_edges function will handle styling consistent with other graphs
add_nodes_and_edges(dot, 'central', data.get('nodes', []), current_depth=1, base_color=base_color)
# Save to temporary file
with NamedTemporaryFile(delete=False, suffix='.png') as tmp:
dot.render(tmp.name, format='png', cleanup=True)
return tmp.name + '.png'
except json.JSONDecodeError:
return "Error: Invalid JSON format"
except Exception as e:
return f"Error: {str(e)}"
|