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310 | class SlackReader(BasePydanticReader):
"""Slack reader.
Reads conversations from channels. If an earliest_date is provided, an
optional latest_date can also be provided. If no latest_date is provided,
we assume the latest date is the current timestamp.
Args:
slack_token (Optional[str]): Slack token. If not provided, we
assume the environment variable `SLACK_BOT_TOKEN` is set.
ssl (Optional[str]): Custom SSL context. If not provided, it is assumed
there is already an SSL context available.
earliest_date (Optional[datetime]): Earliest date from which
to read conversations. If not provided, we read all messages.
latest_date (Optional[datetime]): Latest date from which to
read conversations. If not provided, defaults to current timestamp
in combination with earliest_date.
"""
is_remote: bool = True
slack_token: str
earliest_date_timestamp: Optional[float]
latest_date_timestamp: float
_client: Any = PrivateAttr()
def __init__(
self,
slack_token: Optional[str] = None,
ssl: Optional[SSLContext] = None,
earliest_date: Optional[datetime] = None,
latest_date: Optional[datetime] = None,
earliest_date_timestamp: Optional[float] = None,
latest_date_timestamp: Optional[float] = None,
) -> None:
"""Initialize with parameters."""
from slack_sdk import WebClient
if slack_token is None:
slack_token = os.environ["SLACK_BOT_TOKEN"]
if slack_token is None:
raise ValueError(
"Must specify `slack_token` or set environment "
"variable `SLACK_BOT_TOKEN`."
)
if ssl is None:
client = WebClient(token=slack_token)
else:
client = WebClient(token=slack_token, ssl=ssl)
if latest_date is not None and earliest_date is None:
raise ValueError(
"Must specify `earliest_date` if `latest_date` is specified."
)
if earliest_date is not None:
earliest_date_timestamp = earliest_date.timestamp()
else:
earliest_date_timestamp = None or earliest_date_timestamp
if latest_date is not None:
latest_date_timestamp = latest_date.timestamp()
else:
latest_date_timestamp = datetime.now().timestamp() or latest_date_timestamp
res = client.api_test()
if not res["ok"]:
raise ValueError(f"Error initializing Slack API: {res['error']}")
super().__init__(
slack_token=slack_token,
earliest_date_timestamp=earliest_date_timestamp,
latest_date_timestamp=latest_date_timestamp,
)
self._client = client
@classmethod
def class_name(cls) -> str:
return "SlackReader"
def _read_message(self, channel_id: str, message_ts: str) -> str:
from slack_sdk.errors import SlackApiError
"""Read a message."""
messages_text: List[str] = []
next_cursor = None
while True:
try:
# https://slack.com/api/conversations.replies
# List all replies to a message, including the message itself.
if self.earliest_date_timestamp is None:
result = self._client.conversations_replies(
channel=channel_id, ts=message_ts, cursor=next_cursor
)
else:
conversations_replies_kwargs = {
"channel": channel_id,
"ts": message_ts,
"cursor": next_cursor,
"latest": str(self.latest_date_timestamp),
}
if self.earliest_date_timestamp is not None:
conversations_replies_kwargs["oldest"] = str(
self.earliest_date_timestamp
)
result = self._client.conversations_replies(
**conversations_replies_kwargs # type: ignore
)
messages = result["messages"]
messages_text.extend(message["text"] for message in messages)
if not result["has_more"]:
break
next_cursor = result["response_metadata"]["next_cursor"]
except SlackApiError as e:
error = e.response["error"]
if error == "ratelimited":
retry_after = int(e.response.headers.get("retry-after", 1))
logger.error(
f"Rate limit error reached, sleeping for: {retry_after} seconds"
)
time.sleep(retry_after)
elif error == "not_in_channel":
logger.error(
f"Error: Bot not in channel: {channel_id}, cannot read messages."
)
break
else:
logger.error(
f"Error parsing conversation replies for channel {channel_id}: {e}"
)
break
return "\n\n".join(messages_text)
def _read_channel(self, channel_id: str, reverse_chronological: bool) -> str:
from slack_sdk.errors import SlackApiError
"""Read a channel."""
result_messages: List[str] = []
next_cursor = None
while True:
try:
# Call the conversations.history method using the WebClient
# conversations.history returns the first 100 messages by default
# These results are paginated,
# see: https://api.slack.com/methods/conversations.history$pagination
conversations_history_kwargs = {
"channel": channel_id,
"cursor": next_cursor,
"latest": str(self.latest_date_timestamp),
}
if self.earliest_date_timestamp is not None:
conversations_history_kwargs["oldest"] = str(
self.earliest_date_timestamp
)
result = self._client.conversations_history(
**conversations_history_kwargs # type: ignore
)
conversation_history = result["messages"]
# Print results
logger.info(
f"{len(conversation_history)} messages found in {channel_id}"
)
result_messages.extend(
self._read_message(channel_id, message["ts"])
for message in conversation_history
)
if not result["has_more"]:
break
next_cursor = result["response_metadata"]["next_cursor"]
except SlackApiError as e:
error = e.response["error"]
if error == "ratelimited":
retry_after = int(e.response.headers.get("retry-after", 1))
logger.error(
f"Rate limit error reached, sleeping for: {retry_after} seconds"
)
time.sleep(retry_after)
elif error == "not_in_channel":
logger.error(
f"Error: Bot not in channel: {channel_id}, cannot read messages."
)
break
else:
logger.error(
f"Error parsing conversation replies for channel {channel_id}: {e}"
)
break
return (
"\n\n".join(result_messages)
if reverse_chronological
else "\n\n".join(result_messages[::-1])
)
def load_data(
self, channel_ids: List[str], reverse_chronological: bool = True
) -> List[Document]:
"""Load data from the input slack channel ids.
Args:
channel_ids (List[str]): List of channel ids to read.
Returns:
List[Document]: List of documents.
"""
results = []
for channel_id in channel_ids:
channel_content = self._read_channel(
channel_id, reverse_chronological=reverse_chronological
)
results.append(
Document(
id_=channel_id,
text=channel_content,
metadata={"channel": channel_id},
)
)
return results
def _is_regex(self, pattern: str) -> bool:
"""Check if a string is a regex pattern."""
try:
re.compile(pattern)
return True
except re.error:
return False
def _list_channels(self) -> List[Dict[str, Any]]:
"""List all channels (public and private)."""
from slack_sdk.errors import SlackApiError
try:
result = self._client.conversations_list(
types="public_channel,private_channel"
)
return result["channels"]
except SlackApiError as e:
logger.error(f"Error fetching channels: {e.response['error']}")
raise
def _filter_channels(
self, channels: List[Dict[str, Any]], patterns: List[str]
) -> List[Dict[str, Any]]:
"""Filter channels based on the provided names and regex patterns."""
regex_patterns = [pattern for pattern in patterns if self._is_regex(pattern)]
exact_names = [pattern for pattern in patterns if not self._is_regex(pattern)]
# Match Exact Channel names
filtered_channels = [
channel for channel in channels if channel["name"] in exact_names
]
# Match Regex Patterns
for channel in channels:
for pattern in regex_patterns:
if re.match(pattern, channel["name"]):
filtered_channels.append(channel)
return filtered_channels
def get_channel_ids(self, channel_patterns: List[str]) -> List[str]:
"""Get list of channel IDs based on names and regex patterns.
Args:
channel_patterns List[str]: List of channel name patterns (names or regex) to read.
Returns:
List[Document]: List of documents.
"""
if not channel_patterns:
raise ValueError("No channel patterns provided.")
channels = self._list_channels()
logger.info(f"Total channels fetched: {len(channels)}")
if not channels:
logger.info("No channels found in Slack.")
return []
filtered_channels = self._filter_channels(
channels=channels, patterns=channel_patterns
)
logger.info(f"Channels matching patterns: {len(filtered_channels)}")
if not filtered_channels:
logger.info(
"None of the channel names or pattern matched with Slack Channels."
)
return []
channel_ids = [channel["id"] for channel in filtered_channels]
return list(set(channel_ids))
|
