Add the latest document update to the Slack bot answer (#817)

* Add the latest source update to the Slack bot answer

* fix mypy errors

---------

Co-authored-by: Matthieu Boret <matthieu.boret@fr.clara.net>

backend/danswer/danswerbot/slack/blocks.py

@@ -1,5 +1,7 @@
 from datetime import datetime
 
+import pytz
+import timeago  # type: ignore
 from slack_sdk.models.blocks import ActionsBlock
 from slack_sdk.models.blocks import Block
 from slack_sdk.models.blocks import ButtonElement
@@ -21,7 +23,6 @@ from danswer.danswerbot.slack.utils import translate_vespa_highlight_to_slack
 from danswer.search.models import SavedSearchDoc
 from danswer.utils.text_processing import replace_whitespaces_w_space
 
-
 _MAX_BLURB_LEN = 75
 
 
@@ -109,11 +110,11 @@ def build_documents_blocks(
         match_str = translate_vespa_highlight_to_slack(d.match_highlights, used_chars)
 
         included_docs += 1
-
+        updated_at = timeago.format(d.updated_at, datetime.now(pytz.utc))
         if d.link:
-            block_text = f"<{d.link}|{doc_sem_id}>:\n>{remove_slack_text_interactions(match_str)}"
+            block_text = f"<{d.link}|{doc_sem_id}>\nUpdated {updated_at}\n>{remove_slack_text_interactions(match_str)}"
         else:
-            block_text = f"{doc_sem_id}:\n>{remove_slack_text_interactions(match_str)}"
+            block_text = f"{doc_sem_id}\nUpdated {updated_at}\n>{remove_slack_text_interactions(match_str)}"
 
         section_blocks.append(
             SectionBlock(text=block_text),

backend/requirements/default.txt

@@ -54,6 +54,7 @@ slack-sdk==3.20.2
 SQLAlchemy[mypy]==2.0.15
 tensorflow==2.13.0
 tiktoken==0.4.0
+timeago==1.0.16
 torch==2.0.1
 torchvision==0.15.2
 transformers==4.30.1

backend/requirements/dev.txt

@@ -13,6 +13,7 @@ types-setuptools==68.0.0.3
 types-psutil==5.9.5.17
 types-psycopg2==2.9.21.10
 types-python-dateutil==2.8.19.13
+types-pytz==2023.3.1.1
 types-regex==2023.3.23.1
 types-requests==2.28.11.17
 types-retry==0.9.9.3