Create utils.py

utils.py

@@ -0,0 +1,47 @@
+import json
+from typing import List, Optional, Tuple
+from models import Profile
+
+
+def normalize_skill_list(text: Optional[str]) -> List[str]:
+    if not text:
+        return []
+    for sep in ["\n", ",", ";"]:
+        text = text.replace(sep, "|")
+    items = [i.strip() for i in text.split("|") if i.strip()]
+    return list(dict.fromkeys(items))
+
+
+def make_prompt_for_matching(
+    current_user: Profile,
+    all_users: List[Profile],
+    top_k: int = 5,
+) -> Tuple[str, str]:
+    users_desc = [
+        {
+            "id": u.id,
+            "username": u.username,
+            "offers": u.offers,
+            "wants": u.wants,
+            "availability": u.availability,
+            "preferences": u.preferences,
+        }
+        for u in all_users
+        if u.id != current_user.id
+    ]
+
+    system = (
+        "You are a matchmaking assistant for a free skill-exchange platform. "
+        "Recommend the best matches with JSON output only."
+    )
+
+    user = json.dumps(
+        {
+            "current_user": current_user.to_dict(),
+            "candidates": users_desc,
+            "top_k": top_k,
+        },
+        ensure_ascii=False,
+    )
+
+    return system, user