Show how to only allow one instance

.devcontainer/devcontainer.json

@@ -5,7 +5,7 @@
 	"appPort": [
 		"9123:8123"
 	],
-	"postCreateCommand": "dc install",
+	"postCreateCommand": "cc install",
 	"runArgs": [
 		"-v",
 		"${env:HOME}${env:USERPROFILE}/.ssh:/tmp/.ssh"

custom_components/blueprint/.translations/en.json

@@ -13,6 +13,9 @@
         },
         "error": {
             "auth": "Username/Password is wrong."
+        },
+        "abort": {
+            "single_instance_allowed": "Only a single configuration of Blueprint is allowed."
         }
     },
     "options": {

custom_components/blueprint/.translations/nb.json

@@ -13,6 +13,9 @@
         },
         "error": {
             "auth": "Brukernavn/Passord er feil."
+        },
+        "abort": {
+            "single_instance_allowed": "Du kan konfigurere Blueprint kun en gang."
         }
     },
     "options": {

custom_components/blueprint/config_flow.py

@@ -1,15 +1,14 @@
 """Adds config flow for Blueprint."""
-from collections import OrderedDict
-
 import voluptuous as vol
-from sampleclient.client import Client
 from homeassistant import config_entries
 from homeassistant.core import callback
 
-from custom_components.blueprint.const import (
-    DOMAIN,
+from sampleclient.client import Client
+
+from custom_components.blueprint.const import (  # pylint: disable=unused-import
     CONF_PASSWORD,
     CONF_USERNAME,
+    DOMAIN,
     PLATFORMS,
 )
 
@@ -25,10 +24,15 @@ def __init__(self):
         self._errors = {}
 
     async def async_step_user(
-        self, user_input={}
-    ):  # pylint: disable=dangerous-default-value
+        self, user_input=None  # pylint: disable=bad-continuation
+    ):
         """Handle a flow initialized by the user."""
         self._errors = {}
+
+        # Uncomment the next 2 lines if only a single instance of the integration is allowed:
+        # if self._async_current_entries():
+        #     return self.async_abort(reason="single_instance_allowed")
+
         if user_input is not None:
             valid = await self._test_credentials(
                 user_input[CONF_USERNAME], user_input[CONF_PASSWORD]
@@ -49,7 +53,7 @@ async def async_step_user(
     def async_get_options_flow(config_entry):
         return BlueprintOptionsFlowHandler(config_entry)
 
-    async def _show_config_form(self, user_input):
+    async def _show_config_form(self, user_input):  # pylint: disable=unused-argument
         """Show the configuration form to edit location data."""
         return self.async_show_form(
             step_id="user",
@@ -78,7 +82,7 @@ def __init__(self, config_entry):
         self.config_entry = config_entry
         self.options = dict(config_entry.options)
 
-    async def async_step_init(self, user_input=None):
+    async def async_step_init(self, user_input=None):  # pylint: disable=unused-argument
         """Manage the options."""
         return await self.async_step_user()
 

custom_components/blueprint/entity.py

@@ -43,11 +43,9 @@ def device_state_attributes(self):
 
     async def async_added_to_hass(self):
         """Connect to dispatcher listening for entity data notifications."""
-        self.coordinator.async_add_listener(self.async_write_ha_state)
-
-    async def async_will_remove_from_hass(self):
-        """Disconnect from update signal."""
-        self.coordinator.async_remove_listener(self.async_write_ha_state)
+        self.async_on_remove(
+            self.coordinator.async_add_listener(self.async_write_ha_state)
+        )
 
     async def async_update(self):
         """Update Brother entity."""

hacs.json

@@ -1,5 +1,11 @@
 {
     "name": "Blueprint",
-    "hacs": "0.19.0",
-    "homeassistant": "0.97.0"
+    "hacs": "0.24.0",
+    "domains": [
+        "binary_sensor",
+        "sensor",
+        "switch"
+    ],
+    "iot_class": "Cloud Polling",
+    "homeassistant": "0.108.0"
 }