add human estimation conditions

src/cache/drug_cache.py

@@ -135,5 +135,5 @@ async def fetch_drug_with_dosage(drug_name: str, dosage: float) -> DrugFull | No
         if drug_full:
             return drug_full
 
-    raise Exception(f"Drug {drug_name} with dosage {dosage} not found")
+    return None
 

src/cache/redis_cache.py

@@ -102,7 +102,7 @@ def fetch_drug(drug_name: str) -> DrugPriceResponse:
     return result
 
 
-def search_drug(drug_name: str) -> str:
+def search_drug(drug_name: str) -> str | None:
     cache_key = f"drug_search:{drug_name}"
     redis_client = get_redis_client()
 
@@ -113,15 +113,18 @@ def search_drug(drug_name: str) -> str:
     except Exception:
         pass
 
-    client = httpx.Client(
-        base_url="https://www.drugs.com/api/autocomplete",
-        # headers=headers,
-        timeout=httpx.Timeout(60.0, connect=10.0)
-    )
-    response = client.get(f"/?type=price-guide&s={drug_name}")
-    response_json = response.json()
+    try:
+        client = httpx.Client(
+            base_url="https://www.drugs.com/api/autocomplete",
+            # headers=headers,
+            timeout=httpx.Timeout(60.0, connect=10.0)
+        )
+        response = client.get(f"/?type=price-guide&s={drug_name}")
+        response_json = response.json()
 
-    result = response_json["categories"][0]["results"][0]["url"].replace("/price-guide/", "")
+        result = response_json["categories"][0]["results"][0]["url"].replace("/price-guide/", "")
+    except Exception:
+        return None
 
     try:
         redis_client.setex(cache_key, settings.REDIS_CACHE_TTL_DRUGS, result)