Add config flow to ISS integration (#64987)

* Initial commit

* Wrong flowhandler name

* Add config flow tests

* Tests for config flow

* ...

* Add test for no coordinates

* ...

* Update homeassistant/components/iss/config_flow.py

Co-authored-by: Shay Levy <levyshay1@gmail.com>

* Update homeassistant/components/iss/config_flow.py

* Update homeassistant/components/iss/binary_sensor.py

Co-authored-by: Shay Levy <levyshay1@gmail.com>

* Add myself as codeowner

Co-authored-by: Shay Levy <levyshay1@gmail.com>

homeassistant/components/iss/config_flow.py

@@ -0,0 +1,48 @@
+"""Config flow to configure iss component."""
+
+import voluptuous as vol
+
+from homeassistant import config_entries
+from homeassistant.const import CONF_NAME, CONF_SHOW_ON_MAP
+from homeassistant.data_entry_flow import FlowResult
+
+from .const import DOMAIN
+
+
+class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Config flow for iss component."""
+
+    VERSION = 1
+
+    async def async_step_user(self, user_input=None) -> FlowResult:
+        """Handle a flow initialized by the user."""
+        # Check if already configured
+        if self._async_current_entries():
+            return self.async_abort(reason="single_instance_allowed")
+
+        # Check if location have been defined.
+        if not self.hass.config.latitude and not self.hass.config.longitude:
+            return self.async_abort(reason="latitude_longitude_not_defined")
+
+        if user_input is not None:
+            return self.async_create_entry(
+                title="International Space Station", data=user_input
+            )
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=vol.Schema(
+                {
+                    vol.Optional(CONF_SHOW_ON_MAP, default=False): bool,
+                }
+            ),
+        )
+
+    async def async_step_import(self, conf: dict) -> FlowResult:
+        """Import a configuration from configuration.yaml."""
+        return await self.async_step_user(
+            user_input={
+                CONF_NAME: conf[CONF_NAME],
+                CONF_SHOW_ON_MAP: conf[CONF_SHOW_ON_MAP],
+            }
+        )