1st try of the backend

backend/tool.py

@@ -0,0 +1,36 @@
+from duckduckgo_search import DDGS
+import subprocess
+import shlex
+import math
+
+def web_search(query: str, max_results: int = 5) -> list[dict]:
+    out = []
+    with DDGS() as ddgs:
+        for r in ddgs.text(query, max_results=max_results):
+            out.append({"title": r.get("title"), "url": r.get("href"), "snippet": r.get("body")})
+    return out
+
+def electronics_ohm(V: float | None, I: float | None, R: float | None) -> dict:
+    # résout V=I*R si une variable est None
+    if [V, I, R].count(None) != 1:
+        return {"error": "Donne exactement 2 valeurs (ex: V et R) et laisse l’autre à null."}
+    if V is None:
+        return {"V": I * R}
+    if I is None:
+        return {"I": V / R}
+    return {"R": V / I}
+
+SAFE_COMMANDS = {"git", "docker", "docker-compose", "python", "pip", "ls", "cat", "grep", "tail", "journalctl"}
+
+def run_command(cmd: str) -> dict:
+    # garde-fou minimal : n’autorise que certaines commandes
+    parts = shlex.split(cmd)
+    if not parts:
+        return {"error": "Commande vide."}
+    if parts[0] not in SAFE_COMMANDS:
+        return {"error": f"Commande interdite: {parts[0]} (liste: {sorted(SAFE_COMMANDS)})"}
+    try:
+        p = subprocess.run(parts, capture_output=True, text=True, timeout=25)
+        return {"returncode": p.returncode, "stdout": p.stdout[-4000:], "stderr": p.stderr[-4000:]}
+    except Exception as e:
+        return {"error": str(e)}