Overhaul the Slack integration (async and Block Kit support) (#33287)

* Overhaul the Slack integration

* Docstring

* Empty commit to re-trigger build

* Remove remote file option

* Remove unused function

* Adjust log message

* Update homeassistant/components/slack/notify.py

Co-Authored-By: Paulus Schoutsen <paulus@home-assistant.io>

* Code review

* Add deprecation warning

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

homeassistant/components/slack/manifest.json

@@ -2,7 +2,7 @@
   "domain": "slack",
   "name": "Slack",
   "documentation": "https://www.home-assistant.io/integrations/slack",
-  "requirements": ["slacker==0.14.0"],
+  "requirements": ["slackclient==2.5.0"],
   "dependencies": [],
   "codeowners": []
 }

homeassistant/components/slack/notify.py

@@ -1,10 +1,11 @@
 """Slack platform for notify component."""
+import asyncio
 import logging
+import os
+from urllib.parse import urlparse
 
-import requests
+from slack import WebClient
-from requests.auth import HTTPBasicAuth, HTTPDigestAuth
+from slack.errors import SlackApiError
-import slacker
-from slacker import Slacker
 import voluptuous as vol
 
 from homeassistant.components.notify import (
@@ -15,157 +16,138 @@ from homeassistant.components.notify import (
     BaseNotificationService,
 )
 from homeassistant.const import CONF_API_KEY, CONF_ICON, CONF_USERNAME
-import homeassistant.helpers.config_validation as cv
+from homeassistant.core import callback
+from homeassistant.helpers import aiohttp_client, config_validation as cv
 
 _LOGGER = logging.getLogger(__name__)
 
-CONF_CHANNEL = "default_channel"
-CONF_TIMEOUT = 15
-
-# Top level attributes in 'data'
 ATTR_ATTACHMENTS = "attachments"
+ATTR_BLOCKS = "blocks"
 ATTR_FILE = "file"
-# Attributes contained in file
+
-ATTR_FILE_URL = "url"
+CONF_DEFAULT_CHANNEL = "default_channel"
-ATTR_FILE_PATH = "path"
+
-ATTR_FILE_USERNAME = "username"
+DEFAULT_TIMEOUT_SECONDS = 15
-ATTR_FILE_PASSWORD = "password"
-ATTR_FILE_AUTH = "auth"
-# Any other value or absence of 'auth' lead to basic authentication being used
-ATTR_FILE_AUTH_DIGEST = "digest"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
         vol.Required(CONF_API_KEY): cv.string,
-        vol.Required(CONF_CHANNEL): cv.string,
+        vol.Required(CONF_DEFAULT_CHANNEL): cv.string,
         vol.Optional(CONF_ICON): cv.string,
         vol.Optional(CONF_USERNAME): cv.string,
     }
 )
 
 
-def get_service(hass, config, discovery_info=None):
+async def async_get_service(hass, config, discovery_info=None):
-    """Get the Slack notification service."""
+    """Set up the Slack notification service."""
-
+    session = aiohttp_client.async_get_clientsession(hass)
-    channel = config.get(CONF_CHANNEL)
+    client = WebClient(token=config[CONF_API_KEY], run_async=True, session=session)
-    api_key = config.get(CONF_API_KEY)
-    username = config.get(CONF_USERNAME)
-    icon = config.get(CONF_ICON)
 
     try:
+        await client.auth_test()
+    except SlackApiError as err:
+        _LOGGER.error("Error while setting up integration: %s", err)
+        return
+
     return SlackNotificationService(
-            channel, api_key, username, icon, hass.config.is_allowed_path
+        hass,
+        client,
+        config[CONF_DEFAULT_CHANNEL],
+        username=config.get(CONF_USERNAME),
+        icon=config.get(CONF_ICON),
     )
 
-    except slacker.Error:
+
-        _LOGGER.exception("Authentication failed")
+@callback
-        return None
+def _async_sanitize_channel_names(channel_list):
+    """Remove any # symbols from a channel list."""
+    return [channel.lstrip("#") for channel in channel_list]
 
 
 class SlackNotificationService(BaseNotificationService):
-    """Implement the notification service for Slack."""
+    """Define the Slack notification logic."""
-
-    def __init__(self, default_channel, api_token, username, icon, is_allowed_path):
-        """Initialize the service."""
 
+    def __init__(self, hass, client, default_channel, username, icon):
+        """Initialize."""
+        self._client = client
         self._default_channel = default_channel
-        self._api_token = api_token
+        self._hass = hass
-        self._username = username
         self._icon = icon
-        if self._username or self._icon:
+
+        if username or self._icon:
             self._as_user = False
         else:
             self._as_user = True
 
-        self.is_allowed_path = is_allowed_path
+    async def _async_send_local_file_message(self, path, targets, message, title):
-        self.slack = Slacker(self._api_token)
+        """Upload a local file (with message) to Slack."""
-        self.slack.auth.test()
+        if not self._hass.config.is_allowed_path(path):
+            _LOGGER.error("Path does not exist or is not allowed: %s", path)
+            return
 
-    def send_message(self, message="", **kwargs):
+        parsed_url = urlparse(path)
-        """Send a message to a user."""
+        filename = os.path.basename(parsed_url.path)
 
-        if kwargs.get(ATTR_TARGET) is None:
-            targets = [self._default_channel]
-        else:
-            targets = kwargs.get(ATTR_TARGET)
-
-        data = kwargs.get(ATTR_DATA)
-        attachments = data.get(ATTR_ATTACHMENTS) if data else None
-        file = data.get(ATTR_FILE) if data else None
-        title = kwargs.get(ATTR_TITLE)
-
-        for target in targets:
         try:
-                if file is not None:
+            await self._client.files_upload(
-                    # Load from file or URL
+                channels=",".join(targets),
-                    file_as_bytes = self.load_file(
+                file=path,
-                        url=file.get(ATTR_FILE_URL),
+                filename=filename,
-                        local_path=file.get(ATTR_FILE_PATH),
+                initial_comment=message,
-                        username=file.get(ATTR_FILE_USERNAME),
+                title=title or filename,
-                        password=file.get(ATTR_FILE_PASSWORD),
-                        auth=file.get(ATTR_FILE_AUTH),
             )
-                    # Choose filename
+        except SlackApiError as err:
-                    if file.get(ATTR_FILE_URL):
+            _LOGGER.error("Error while uploading file-based message: %s", err)
-                        filename = file.get(ATTR_FILE_URL)
+
-                    else:
+    async def _async_send_text_only_message(
-                        filename = file.get(ATTR_FILE_PATH)
+        self, targets, message, title, attachments, blocks
-                    # Prepare structure for Slack API
+    ):
-                    data = {
+        """Send a text-only message."""
-                        "content": None,
+        tasks = {
-                        "filetype": None,
+            target: self._client.chat_postMessage(
-                        "filename": filename,
+                channel=target,
-                        # If optional title is none use the filename
+                text=message,
-                        "title": title if title else filename,
-                        "initial_comment": message,
-                        "channels": target,
-                    }
-                    # Post to slack
-                    self.slack.files.post(
-                        "files.upload", data=data, files={"file": file_as_bytes}
-                    )
-                else:
-                    self.slack.chat.post_message(
-                        target,
-                        message,
                 as_user=self._as_user,
-                        username=self._username,
-                        icon_emoji=self._icon,
                 attachments=attachments,
+                blocks=blocks,
+                icon_emoji=self._icon,
                 link_names=True,
             )
-            except slacker.Error as err:
+            for target in targets
-                _LOGGER.error("Could not send notification. Error: %s", err)
+        }
 
-    def load_file(
+        results = await asyncio.gather(*tasks.values(), return_exceptions=True)
-        self, url=None, local_path=None, username=None, password=None, auth=None
+        for target, result in zip(tasks, results):
-    ):
+            if isinstance(result, SlackApiError):
-        """Load image/document/etc from a local path or URL."""
+                _LOGGER.error(
-        try:
+                    "There was a Slack API error while sending to %s: %s",
-            if url:
+                    target,
-                # Check whether authentication parameters are provided
+                    result,
-                if username:
+                )
-                    # Use digest or basic authentication
-                    if ATTR_FILE_AUTH_DIGEST == auth:
-                        auth_ = HTTPDigestAuth(username, password)
-                    else:
-                        auth_ = HTTPBasicAuth(username, password)
-                    # Load file from URL with authentication
-                    req = requests.get(url, auth=auth_, timeout=CONF_TIMEOUT)
-                else:
-                    # Load file from URL without authentication
-                    req = requests.get(url, timeout=CONF_TIMEOUT)
-                return req.content
 
-            if local_path:
+    async def async_send_message(self, message, **kwargs):
-                # Check whether path is whitelisted in configuration.yaml
+        """Send a message to Slack."""
-                if self.is_allowed_path(local_path):
+        data = kwargs[ATTR_DATA] or {}
-                    return open(local_path, "rb")
+        title = kwargs.get(ATTR_TITLE)
-                _LOGGER.warning("'%s' is not secure to load data from!", local_path)
+        targets = _async_sanitize_channel_names(
-            else:
+            kwargs.get(ATTR_TARGET, [self._default_channel])
-                _LOGGER.warning("Neither URL nor local path found in parameters!")
+        )
 
-        except OSError as error:
+        if ATTR_FILE in data:
-            _LOGGER.error("Can't load from URL or local path: %s", error)
+            return await self._async_send_local_file_message(
+                data[ATTR_FILE], targets, message, title
+            )
 
-        return None
+        attachments = data.get(ATTR_ATTACHMENTS, {})
+        if attachments:
+            _LOGGER.warning(
+                "Attachments are deprecated and part of Slack's legacy API; support "
+                "for them will be dropped in 0.114.0. In most cases, Blocks should be "
+                "used instead: https://www.home-assistant.io/integrations/slack/"
+            )
+        blocks = data.get(ATTR_BLOCKS, {})
+
+        return await self._async_send_text_only_message(
+            targets, message, title, attachments, blocks
+        )

requirements_all.txt

@@ -1879,7 +1879,7 @@ sisyphus-control==2.2.1
 skybellpy==0.4.0
 
 # homeassistant.components.slack
-slacker==0.14.0
+slackclient==2.5.0
 
 # homeassistant.components.sleepiq
 sleepyq==0.7