Bug fix for Telegram bot integration: Handle plain text parse_mode (home-assistant#146535)

Author: hanwg

homeassistant/components/telegram_bot/bot.py

@@ -233,13 +233,13 @@ def __init__(
         """Initialize the service."""
         self.app = app
         self.config = config
-        self._parsers = {
+        self._parsers: dict[str, str | None] = {
             PARSER_HTML: ParseMode.HTML,
             PARSER_MD: ParseMode.MARKDOWN,
             PARSER_MD2: ParseMode.MARKDOWN_V2,
             PARSER_PLAIN_TEXT: None,
         }
-        self.parse_mode = self._parsers.get(parser)
+        self.parse_mode = self._parsers[parser]
         self.bot = bot
         self.hass = hass
         self._last_message_id: dict[int, int] = {}

homeassistant/components/telegram_bot/config_flow.py

@@ -54,6 +54,7 @@
     PARSER_HTML,
     PARSER_MD,
     PARSER_MD2,
+    PARSER_PLAIN_TEXT,
     PLATFORM_BROADCAST,
     PLATFORM_POLLING,
     PLATFORM_WEBHOOKS,
@@ -126,8 +127,8 @@
             ATTR_PARSER,
         ): SelectSelector(
             SelectSelectorConfig(
-                options=[PARSER_MD, PARSER_MD2, PARSER_HTML],
-                translation_key="parsers",
+                options=[PARSER_MD, PARSER_MD2, PARSER_HTML, PARSER_PLAIN_TEXT],
+                translation_key="parse_mode",
             )
         )
     }
@@ -143,6 +144,8 @@ async def async_step_init(
         """Manage the options."""
 
         if user_input is not None:
+            if user_input[ATTR_PARSER] == PARSER_PLAIN_TEXT:
+                user_input[ATTR_PARSER] = None
             return self.async_create_entry(data=user_input)
 
         return self.async_show_form(

homeassistant/components/telegram_bot/services.yaml

@@ -27,6 +27,7 @@ send_message:
             - "markdown"
             - "markdownv2"
             - "plain_text"
+          translation_key: "parse_mode"
     disable_notification:
       selector:
         boolean:

homeassistant/components/telegram_bot/strings.json

@@ -106,11 +106,12 @@
         "webhooks": "Webhooks"
       }
     },
-    "parsers": {
+    "parse_mode": {
       "options": {
         "markdown": "Markdown (Legacy)",
         "markdownv2": "MarkdownV2",
-        "html": "HTML"
+        "html": "HTML",
+        "plain_text": "Plain text"
       }
     }
   },

tests/components/telegram_bot/test_config_flow.py

@@ -19,8 +19,8 @@
     ERROR_MESSAGE,
     ISSUE_DEPRECATED_YAML,
     ISSUE_DEPRECATED_YAML_IMPORT_ISSUE_ERROR,
-    PARSER_HTML,
     PARSER_MD,
+    PARSER_PLAIN_TEXT,
     PLATFORM_BROADCAST,
     PLATFORM_WEBHOOKS,
     SUBENTRY_TYPE_ALLOWED_CHAT_IDS,
@@ -56,13 +56,13 @@ async def test_options_flow(
     result = await hass.config_entries.options.async_configure(
         result["flow_id"],
         {
-            ATTR_PARSER: PARSER_HTML,
+            ATTR_PARSER: PARSER_PLAIN_TEXT,
         },
     )
     await hass.async_block_till_done()
 
     assert result["type"] == FlowResultType.CREATE_ENTRY
-    assert result["data"][ATTR_PARSER] == PARSER_HTML
+    assert result["data"][ATTR_PARSER] is None
 
 
 async def test_reconfigure_flow_broadcast(