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"""
id: compose
title: Plan Composer
author: admin
description: Execute a multi-step plan across tools (YAML or JSON).
version: 0.1.0
license: Proprietary
"""
import json
from typing import Any, Dict
class Tools:
def run(self, plan: str, variables_json: str = "{}") -> Dict[str, Any]:
"""
Execute a plan (YAML or JSON). Each step: {tool: id, func: name, args: {...}}
variables_json: JSON dict for ${var} substitution in args.
"""
import re
from open_webui.utils.plugin import load_tool_module_by_id
try:
import yaml # type: ignore
try_yaml = True
except Exception:
try_yaml = False
# Parse plan
try:
steps = yaml.safe_load(plan) if try_yaml else json.loads(plan)
except Exception:
steps = json.loads(plan) # fallback
if isinstance(steps, dict) and "steps" in steps:
steps = steps["steps"]
assert isinstance(steps, list), "plan must be a list of steps"
vars = json.loads(variables_json) if variables_json else {}
def subst(obj):
if isinstance(obj, str):
return re.sub(
r"\$\{([A-Za-z0-9_]+)\}",
lambda m: str(vars.get(m.group(1), m.group(0))),
obj,
)
if isinstance(obj, dict):
return {k: subst(v) for k, v in obj.items()}
if isinstance(obj, list):
return [subst(x) for x in obj]
return obj
results = []
for i, step in enumerate(steps, 1):
tool_id = step.get("tool")
func = step.get("func")
args = subst(step.get("args", {}))
if not tool_id or not func:
results.append({"step": i, "error": "missing tool or func"})
continue
try:
mod, _fm = load_tool_module_by_id(tool_id)
callable = getattr(mod, func)
out = callable(**args) if callable else {"error": "func not found"}
results.append(
{"step": i, "tool": tool_id, "func": func, "result": out}
)
except Exception as e:
results.append(
{"step": i, "tool": tool_id, "func": func, "error": str(e)}
)
return {"ok": True, "results": results}
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