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Code Formatter Advanced Tool - Format code trong nhiều ngôn ngữ.
Author: Hieu Louis (2026)
- Python : stdlib ast + simple normalizer (rstrip, blank-line cleanup, trailing newline)
- JSON : stdlib json.dumps(indent=2)
- JS : lazy import `jsbeautifier`
- SQL : lazy import `sqlparse`
- HTML : lazy import `beautifulsoup4` (bs4)
- CSS : lazy import `cssbeautifier`
In-place edit nếu cung cấp `path`. MODERATE safety, requires_confirmation.
"""
from __future__ import annotations
import ast
import json
from typing import Any, Dict, Optional
from .base import Tool, ToolResult, ToolContext, ToolCategory, ToolSafety
SUPPORTED_LANGS = {"python", "javascript", "sql", "html", "css", "json"}
def _format_python(source: str) -> str:
"""Format Python cơ bản: validate syntax, rstrip lines, cleanup blank runs."""
ast.parse(source) # raise SyntaxError if invalid
lines = source.splitlines()
out: list[str] = []
blank_run = 0
for ln in lines:
stripped = ln.rstrip()
if stripped == "":
blank_run += 1
# Tối đa 2 blank lines liên tiếp
if blank_run <= 2:
out.append("")
continue
blank_run = 0
out.append(stripped)
formatted = "\n".join(out).rstrip() + "\n"
return formatted
def _format_json(source: str) -> str:
data = json.loads(source)
return json.dumps(data, indent=2, ensure_ascii=False) + "\n"
class CodeFormatterAdvancedTool(Tool):
"""Format code multi-language: Python/JSON (stdlib) + JS/SQL/HTML/CSS (lazy deps)."""
category = ToolCategory.CODE
safety = ToolSafety.MODERATE # có thể sửa file in-place
requires_confirmation = True
@property
def name(self) -> str:
return "code_formatter_advanced"
@property
def description(self) -> str:
return (
"Format code multi-language: Python (ast), JSON (stdlib), "
"JavaScript (jsbeautifier), SQL (sqlparse), HTML (bs4), CSS (cssbeautifier). "
"In-place edit nếu cung cấp path."
)
@property
def parameters(self) -> Dict[str, Any]:
return {
"type": "object",
"properties": {
"path": {"type": "string", "description": "File để format (in-place)"},
"code": {"type": "string", "description": "Code để format (nếu không dùng path)"},
"language": {
"type": "string",
"enum": sorted(SUPPORTED_LANGS),
"description": "Ngôn ngữ (mặc định python)",
},
},
"anyOf": [{"required": ["path"]}, {"required": ["code"]}],
}
def validate_args(self, args: Dict[str, Any]) -> Optional[str]:
if not args.get("path") and not args.get("code"):
return "Missing required arg: path hoặc code"
lang = args.get("language", "python")
if lang not in SUPPORTED_LANGS:
return f"Unsupported language: {lang}. Chọn: {sorted(SUPPORTED_LANGS)}"
return None
def execute(self, args: Dict[str, Any], context: ToolContext) -> ToolResult:
lang = args.get("language", "python")
path = args.get("path")
code: Optional[str] = args.get("code")
if path:
if context.dry_run:
return ToolResult(
success=True,
output=f"[dry-run] Sẽ format {path} ({lang})",
metadata={"path": path, "language": lang, "dry_run": True},
)
try:
with open(path, "r", encoding="utf-8") as f:
code = f.read()
except Exception as e:
return ToolResult(success=False, error=f"Đọc file lỗi: {e}", return_code=1)
assert code is not None # validated above
try:
if lang == "python":
formatted = _format_python(code)
elif lang == "json":
formatted = _format_json(code)
elif lang == "javascript":
try:
import jsbeautifier # type: ignore
except ImportError as e:
return ToolResult(
success=False,
error=f"jsbeautifier not installed: {e}. Cài: pip install jsbeautifier",
return_code=127,
)
formatted = jsbeautifier.beautify(code)
elif lang == "sql":
try:
import sqlparse # type: ignore
except ImportError as e:
return ToolResult(
success=False,
error=f"sqlparse not installed: {e}. Cài: pip install sqlparse",
return_code=127,
)
formatted = sqlparse.format(
code, reindent=True, keyword_case="upper", indent_width=2,
)
elif lang == "html":
try:
from bs4 import BeautifulSoup # type: ignore
except ImportError as e:
return ToolResult(
success=False,
error=f"beautifulsoup4 not installed: {e}. Cài: pip install beautifulsoup4",
return_code=127,
)
soup = BeautifulSoup(code, "html.parser")
formatted = soup.prettify()
elif lang == "css":
try:
import cssbeautifier # type: ignore
except ImportError as e:
return ToolResult(
success=False,
error=f"cssbeautifier not installed: {e}. Cài: pip install cssbeautifier",
return_code=127,
)
formatted = cssbeautifier.beautify(code)
else:
return ToolResult(success=False, error=f"Unsupported language: {lang}", return_code=1)
except Exception as e:
return ToolResult(success=False, error=f"{type(e).__name__}: {e}", return_code=1)
# Write back if path provided
artifacts = []
if path:
try:
with open(path, "w", encoding="utf-8") as f:
f.write(formatted)
artifacts.append(path)
except Exception as e:
return ToolResult(success=False, error=f"Write file lỗi: {e}", return_code=1)
return ToolResult(
success=True,
output=formatted,
artifacts=artifacts,
metadata={
"language": lang,
"path": path,
"input_length": len(code),
"output_length": len(formatted),
"in_place": bool(path),
},
)
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