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87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
import base64
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import re
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from crewai.flow.path_utils import validate_path_exists
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class HTMLTemplateHandler:
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"""Handles HTML template processing and generation for flow visualization diagrams."""
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def __init__(self, template_path, logo_path):
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"""
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Initialize HTMLTemplateHandler with validated template and logo paths.
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Parameters
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----------
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template_path : str
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Path to the HTML template file.
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logo_path : str
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Path to the logo image file.
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Raises
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------
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ValueError
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If template or logo paths are invalid or files don't exist.
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"""
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try:
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self.template_path = validate_path_exists(template_path, "file")
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self.logo_path = validate_path_exists(logo_path, "file")
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except ValueError as e:
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raise ValueError(f"Invalid template or logo path: {e}") from e
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def read_template(self):
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"""Read and return the HTML template file contents."""
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with open(self.template_path, "r", encoding="utf-8") as f:
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return f.read()
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def encode_logo(self):
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"""Convert the logo SVG file to base64 encoded string."""
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with open(self.logo_path, "rb") as logo_file:
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logo_svg_data = logo_file.read()
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return base64.b64encode(logo_svg_data).decode("utf-8")
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def extract_body_content(self, html):
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"""Extract and return content between body tags from HTML string."""
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match = re.search("<body.*?>(.*?)</body>", html, re.DOTALL)
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return match.group(1) if match else ""
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def generate_legend_items_html(self, legend_items):
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"""Generate HTML markup for the legend items."""
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legend_items_html = ""
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for item in legend_items:
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if "border" in item:
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legend_items_html += f"""
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<div class="legend-item">
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<div class="legend-color-box" style="background-color: {item["color"]}; border: 2px dashed {item["border"]};"></div>
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<div>{item["label"]}</div>
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</div>
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"""
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elif item.get("dashed") is not None:
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style = "dashed" if item["dashed"] else "solid"
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legend_items_html += f"""
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<div class="legend-item">
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<div class="legend-{style}" style="border-bottom: 2px {style} {item["color"]};"></div>
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<div>{item["label"]}</div>
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</div>
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"""
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else:
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legend_items_html += f"""
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<div class="legend-item">
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<div class="legend-color-box" style="background-color: {item["color"]};"></div>
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<div>{item["label"]}</div>
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</div>
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"""
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return legend_items_html
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def generate_final_html(self, network_body, legend_items_html, title="Flow Plot"):
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"""Combine all components into final HTML document with network visualization."""
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html_template = self.read_template()
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logo_svg_base64 = self.encode_logo()
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return (
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html_template.replace("{{ title }}", title)
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.replace("{{ network_content }}", network_body)
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.replace("{{ logo_svg_base64 }}", logo_svg_base64)
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.replace("<!-- LEGEND_ITEMS_PLACEHOLDER -->", legend_items_html)
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)
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