Use ConfigFlow.has_matching_flow to deduplicate steamist flows (#126897)

homeassistant/components/steamist/config_flow.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import logging
-from typing import Any
+from typing import Any, Self
 
 from aiosteamist import Steamist
 from discovery30303 import Device30303, normalize_mac
@@ -33,6 +33,8 @@ class SteamistConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
+    host: str | None = None
+
     def __init__(self) -> None:
         """Initialize the config flow."""
         self._discovered_devices: dict[str, Device30303] = {}
@@ -78,10 +80,9 @@ class SteamistConfigFlow(ConfigFlow, domain=DOMAIN):
                 ):
                     self.hass.config_entries.async_schedule_reload(entry.entry_id)
                 return self.async_abort(reason="already_configured")
-        self.context[CONF_HOST] = host
-        for progress in self._async_in_progress():
-            if progress.get("context", {}).get(CONF_HOST) == host:
-                return self.async_abort(reason="already_in_progress")
+        self.host = host
+        if self.hass.config_entries.flow.async_has_matching_flow(self):
+            return self.async_abort(reason="already_in_progress")
         if not device.name:
             discovery = await async_discover_device(self.hass, device.ipaddress)
             if not discovery:
@@ -92,6 +93,10 @@ class SteamistConfigFlow(ConfigFlow, domain=DOMAIN):
             return self.async_abort(reason="not_steamist_device")
         return await self.async_step_discovery_confirm()
 
+    def is_matching(self, other_flow: Self) -> bool:
+        """Return True if other_flow is matching this flow."""
+        return other_flow.host == self.host
+
     async def async_step_discovery_confirm(
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult: