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41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
from __future__ import annotations
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from collections.abc import Mapping
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from typing import Any, Protocol
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from core.helper.code_executor.code_executor import CodeExecutionError, CodeExecutor, CodeLanguage
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class TemplateRenderError(ValueError):
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"""Raised when rendering a Jinja2 template fails."""
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class Jinja2TemplateRenderer(Protocol):
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"""Render Jinja2 templates for template transform nodes."""
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def render_template(self, template: str, variables: Mapping[str, Any]) -> str:
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"""Render a Jinja2 template with provided variables."""
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raise NotImplementedError
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class CodeExecutorJinja2TemplateRenderer(Jinja2TemplateRenderer):
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"""Adapter that renders Jinja2 templates via CodeExecutor."""
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_code_executor: type[CodeExecutor]
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def __init__(self, code_executor: type[CodeExecutor] | None = None) -> None:
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self._code_executor = code_executor or CodeExecutor
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def render_template(self, template: str, variables: Mapping[str, Any]) -> str:
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try:
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result = self._code_executor.execute_workflow_code_template(
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language=CodeLanguage.JINJA2, code=template, inputs=variables
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)
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except CodeExecutionError as exc:
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raise TemplateRenderError(str(exc)) from exc
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rendered = result.get("result")
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if not isinstance(rendered, str):
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raise TemplateRenderError("Template render result must be a string.")
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return rendered
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