Use dataclass properties in syncthru discovery (#60739)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/syncthru/config_flow.py

@@ -10,6 +10,7 @@ import voluptuous as vol
 from homeassistant import config_entries
 from homeassistant.components import ssdp
 from homeassistant.const import CONF_NAME, CONF_URL
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers import aiohttp_client
 
 from .const import DEFAULT_MODEL, DEFAULT_NAME_TEMPLATE, DOMAIN
@@ -33,15 +34,15 @@ class SyncThruConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         """Handle import initiated flow."""
         return await self.async_step_user(user_input=user_input)
 
-    async def async_step_ssdp(self, discovery_info):
+    async def async_step_ssdp(self, discovery_info: ssdp.SsdpServiceInfo) -> FlowResult:
         """Handle SSDP initiated flow."""
-        await self.async_set_unique_id(discovery_info[ssdp.ATTR_UPNP_UDN])
+        await self.async_set_unique_id(discovery_info.upnp[ssdp.ATTR_UPNP_UDN])
         self._abort_if_unique_id_configured()
 
         self.url = url_normalize(
-            discovery_info.get(
+            discovery_info.upnp.get(
                 ssdp.ATTR_UPNP_PRESENTATION_URL,
-                f"http://{urlparse(discovery_info[ssdp.ATTR_SSDP_LOCATION]).hostname}/",
+                f"http://{urlparse(discovery_info.ssdp_location or '').hostname}/",
             )
         )
 
@@ -50,12 +51,12 @@ class SyncThruConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         ):
             # Update unique id of entry with the same URL
             if not existing_entry.unique_id:
-                await self.hass.config_entries.async_update_entry(
-                    existing_entry, unique_id=discovery_info[ssdp.ATTR_UPNP_UDN]
+                self.hass.config_entries.async_update_entry(
+                    existing_entry, unique_id=discovery_info.upnp[ssdp.ATTR_UPNP_UDN]
                 )
             return self.async_abort(reason="already_configured")
 
-        self.name = discovery_info.get(ssdp.ATTR_UPNP_FRIENDLY_NAME)
+        self.name = discovery_info.upnp.get(ssdp.ATTR_UPNP_FRIENDLY_NAME, "")
         if self.name:
             # Remove trailing " (ip)" if present for consistency with user driven config
             self.name = re.sub(r"\s+\([\d.]+\)\s*$", "", self.name)