V3 api, more flexible formulas, persist storage

custom_components/openweathermaphistory/__init__.py

@@ -1 +1,25 @@
-# 
+"""The openweathermaphistory integration."""
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Set up from a config entry (from UI config)"""
+    entry.async_on_unload(entry.add_update_listener(update_listener))
+    await hass.config_entries.async_forward_entry_setups(entry, [Platform.SENSOR])
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Unload a config entry."""
+    unload_ok = await hass.config_entries.async_unload_platforms(
+        entry, [Platform.SENSOR]
+    )
+    return unload_ok
+
+
+async def update_listener(hass: HomeAssistant, entry: ConfigEntry) -> None:
+    """Handle options flow update (from UI reconfigure)."""
+    await hass.config_entries.async_reload(entry.entry_id)