feat: enforce strict demographic matching for MRN, Gender, and DOB

fiveparaminte-main/routers/dashboard.py

@@ -391,44 +391,35 @@ def match_patient(
         db.commit()
         db.refresh(matched_patient)
 
-    # Fetch all patients to compute scores
+    # Fetch all patients to find an exact match
     all_patients = db.query(Patient).all()
-    match_score = 0
     best_match = None
 
     for p in all_patients:
-        score = 0
-
-        # --- MRN check (primary, required) ---
+        # --- MRN check (must match exactly) ---
         p_mrn = (p.mrn or p.patient_id or "").strip().upper()
-        if in_mrn and p_mrn == in_mrn:
-            score += 10
-        else:
-            continue  # MRN must match
+        if p_mrn != in_mrn:
+            continue
 
-        # --- Gender check ---
-        if in_gender and p.gender:
-            if _gender_code(p.gender) == in_gender:
-                score += 3
+        # --- Gender check (must match exactly) ---
+        p_gender = _gender_code(p.gender or "")
+        if p_gender != in_gender:
+            continue
 
-        # --- DOB check ---
-        if in_dob and p.dob:
-            if _normalize_dob(p.dob) == in_dob:
-                score += 3
+        # --- DOB check (must match exactly) ---
+        p_dob = _normalize_dob(p.dob or "")
+        if p_dob != in_dob:
+            continue
 
-        # --- Age check ---
-        if in_age is not None and p.dob:
-            calc_p_age = _calculate_age(p.dob)
-            if calc_p_age is not None and calc_p_age == in_age:
-                score += 2
-
-        if score > match_score:
-            match_score = score
+        # If MRN, gender, and DOB all match, we have our matched patient
         best_match = p
+        break
 
-    # Require MRN match (10) + at least one secondary attribute (gender/dob/age)
-    if not best_match or match_score < 12:
-        return {"matched": False, "reason": "No matching patient found in monitor database with 4-point verification (MRN + Gender + DOB + Age)"}
+    if not best_match:
+        return {
+            "matched": False,
+            "reason": "Patient verification failed. MRN, Gender, and DOB must match exactly."
+        }
 
     matched_patient = best_match
 
@@ -484,6 +475,6 @@ def match_patient(
         "bed_id": matched_patient.bed_id,
         "device_status": device_status,
         "last_reading_at": latest.timestamp.isoformat() if latest.timestamp else None,
-        "match_score": match_score,
+        "match_score": 100,
     }