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import os
import sys
import random
import argparse
from logging import getLogger
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from modules.chart_engine.template.template_registry import get_template_for_chart_type, get_template_for_chart_name
from modules.chart_engine.utils.load_charts import render_chart_to_svg
from modules.chart_engine.utils.file_utils import create_temp_file, cleanup_temp_file, ensure_temp_dir, create_fallback_svg
import importlib
logger = getLogger(__name__)
def load_data_from_json(json_file_path="input.json"):
"""
Load chart data from a JSON file
Args:
json_file_path: Path to the JSON file
Returns:
Dict containing the JSON data
"""
with open(json_file_path, 'r', encoding='utf-8') as f:
return json.load(f)
def process(input: str, output: str, chart_name: str = None, html_output: str = None) -> bool:
"""
Pipeline入口函数，处理单个文件的图表生成
Args:
input: 输入JSON文件路径
output: 输出SVG文件路径
chart_name: 图表名称（可选）
html_output: HTML输出路径（可选）
Returns:
bool: 处理是否成功
"""
try:
# Ensure tmp directory exists
tmp_dir = ensure_temp_dir()
# Load data from input JSON file
try:
json_data = load_data_from_json(input)
logger.info(f"Loaded data from {input}")
except Exception as e:
logger.error(f"Error loading JSON data from {input}: {e}")
return False
# Determine chart name (from args, JSON, or default)
if chart_name is None:
# Try to get chart name from JSON data
chart_name = json_data.get("chart_name", "donut_chart_01")
logger.info(f"Using chart name: {chart_name}")
# Get the appropriate template for this chart type
engine_preference = None
engine, template = get_template_for_chart_name(chart_name, engine_preference=engine_preference)
if engine is None:
logger.error(f"No template found for chart name '{chart_name}'")
return False
logger.info(f"Using {engine} template for {chart_name}")
# Get dimensions from JSON data
width = json_data.get("variables", {}).get("width", 1200)
height = json_data.get("variables", {}).get("height", 800)
logger.info(f"Using dimensions: {width}x{height}")
# Determine output SVG path
if output:
output_svg_path = output
else:
# Generate a random output SVG filename in tmp directory
output_svg_path = os.path.join(tmp_dir, input.split('.')[0].split('/')[-1] + "_" + f"{chart_name.replace(' ', '_')}.svg")
svg_file = None
error_message = None
try:
if engine == 'echarts_py':
# Use Python template
options = template.make_options(json_data)
# Save options to temporary file
echarts_options_file = create_temp_file(prefix="echarts_options_", suffix=".json",
content=json.dumps(options, indent=2))
# Use same renderer as echarts-js
logger.info(f"Using ECharts renderer for Python-generated options")
# Create JS wrapper function
js_wrapper_content = f"""
function make_option(jsonData) {{
return {json.dumps(options)};
}}
"""
js_wrapper_file = create_temp_file(prefix="echarts_wrapper_", suffix=".js",
content=js_wrapper_content)
try:
# Render SVG
svg_file = render_chart_to_svg(
json_data=json_data,
output_svg_path=output_svg_path,
js_file=js_wrapper_file,
width=width,
height=height,
framework="echarts"
)
if svg_file is None:
raise ValueError("SVG chart generation failed (returned None)")
logger.info(f"ECharts SVG chart generated successfully")
finally:
# Clean up temporary files
cleanup_temp_file(js_wrapper_file)
cleanup_temp_file(echarts_options_file)
elif engine == 'echarts-js':
# Use unified render_chart_to_svg function
try:
svg_file = render_chart_to_svg(
json_data=json_data,
output_svg_path=output_svg_path,
js_file=template,
width=width,
height=height,
framework="echarts",
html_output_path=html_output,
)
if svg_file is None:
raise ValueError("SVG chart generation failed (returned None)")
logger.info(f"ECharts SVG chart generated successfully")
except Exception as e:
error_message = str(e)
raise Exception(f"Failed to generate ECharts JavaScript chart: {error_message}")
elif engine == 'd3-js':
# Use unified render_chart_to_svg function
try:
svg_file = render_chart_to_svg(
json_data=json_data,
output_svg_path=output_svg_path,
js_file=template,
width=width,
height=height,
framework="d3",
html_output_path=html_output,
)
if svg_file is None:
raise ValueError("SVG chart generation failed (returned None)")
logger.info(f"D3.js SVG chart generated successfully")
except Exception as e:
error_message = str(e)
raise Exception(f"Failed to generate D3.js chart: {error_message}")
elif engine == 'vegalite_py':
# Use vegalite_py template
template_root = "template.vegalite_py"
general_chart_type = template.split('/')[-2]
module_name = template.split('/')[-1].split('.')[0]
module_path = f"{template_root}.{general_chart_type}.{module_name}"
module = importlib.import_module(module_path)
chart_words = module_name.split('_')
chart_words = [word.capitalize() for word in chart_words]
chart_type = ''.join(chart_words)
template_class = getattr(module, chart_type)
template_object = template_class(json_data)
vega_spec = template_object.make_specification(json_data)
vega_spec_file = create_temp_file(prefix="vega_spec_", suffix=".json",
content=json.dumps(vega_spec, indent=2))
try:
svg_file, svg_content = template_object.specification_to_svg(vega_spec, output_svg_path)
if svg_file is None:
raise ValueError("SVG chart generation failed (returned None)")
element_tree = template_object.svg_to_element_tree(svg_content)
template_object.apply_variation(json_data)
svg_file = output_svg_path
svg_content = template_object.element_tree_to_svg(template_object.elements_tree)
with open(output_svg_path, 'w', encoding='utf-8') as f:
f.write(svg_content)
logger.info(f"VegaLite SVG chart generated successfully")
finally:
cleanup_temp_file(vega_spec_file)
else:
error_message = f"Unknown engine type: {engine}"
logger.error(error_message)
return False
if svg_file is not None and os.path.exists(svg_file):
logger.info(f"Final SVG output: {svg_file}")
return True
else:
logger.error("Error: No SVG file was generated")
return False
except Exception as e:
logger.error(f"Error generating chart: {e}")
return False
except Exception as e:
logger.error(f"Error in chart generation process: {e}")
return False
def parse_arguments():
"""
Parse command-line arguments
Returns:
Namespace containing the parsed arguments
"""
parser = argparse.ArgumentParser(description='Generate chart SVG from JSON data')
parser.add_argument('--input', type=str, default='input.json',
help='Path to input JSON file (default: input.json)')
parser.add_argument('--output', type=str, default=None,
help='Path to output SVG file (default: auto-generated in tmp directory)')
parser.add_argument('--name', type=str, default=None,
help='Chart name to use (default: uses value from JSON or a default name)')
parser.add_argument('--html', type=str, default=None,
help='Path to save intermediate HTML file (default: not saved)')
return parser.parse_args()
if __name__ == '__main__':
# Parse command-line arguments
args = parse_arguments()
success = process(
input=args.input,
output=args.output,
chart_name=args.name,
html_output=args.html
)
if success:
print("Chart generation succeeded.")
else:
print("Chart generation failed.")
sys.exit(1)
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