Show in Assist dialog if assistant is unable to control Home Assistant (#21549)

* Show in Assist dialog if assistant is unable to control Home Assistant

* Update src/translations/en.json

src/data/conversation.ts

@@ -1,6 +1,10 @@
 import { ensureArray } from "../common/array/ensure-array";
 import { HomeAssistant } from "../types";
 
+export const enum ConversationEntityFeature {
+  CONTROL = 1,
+}
+
 interface IntentTarget {
   type: "area" | "device" | "entity" | "domain" | "device_class" | "custom";
   name: string;

src/dialogs/voice-command-dialog/ha-voice-command-dialog.ts

@@ -41,6 +41,8 @@ import { AudioRecorder } from "../../util/audio-recorder";
 import { documentationUrl } from "../../util/documentation-url";
 import { showAlertDialog } from "../generic/show-dialog-box";
 import { VoiceCommandDialogParams } from "./show-ha-voice-command-dialog";
+import { supportsFeature } from "../../common/entity/supports-feature";
+import { ConversationEntityFeature } from "../../data/conversation";
 
 interface Message {
   who: string;
@@ -136,6 +138,12 @@ export class HaVoiceCommandDialog extends LitElement {
       return nothing;
     }
 
+    const controlHA = !this._pipeline
+      ? false
+      : supportsFeature(
+          this.hass.states[this._pipeline?.conversation_engine],
+          ConversationEntityFeature.CONTROL
+        );
     const supportsMicrophone = AudioRecorder.isSupported;
     const supportsSTT = this._pipeline?.stt_engine;
 
@@ -212,6 +220,15 @@ export class HaVoiceCommandDialog extends LitElement {
             ></ha-icon-button>
           </a>
         </ha-dialog-header>
+        ${controlHA
+          ? nothing
+          : html`
+              <ha-alert>
+                ${this.hass.localize(
+                  "ui.dialogs.voice_command.conversation_no_control"
+                )}
+              </ha-alert>
+            `}
         <div class="messages">
           <div class="messages-container" id="scroll-container">
             ${this._conversation!.map(

src/translations/en.json

@@ -1129,6 +1129,7 @@
         "did_not_understand": "Didn't quite get that",
         "found": "I found the following for you:",
         "error": "Oops, an error has occurred",
+        "conversation_no_control": "This assistant cannot control your home.",
         "how_can_i_help": "How can I assist?",
         "input_label": "Enter a request",
         "send_text": "Send text",