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Astra Logical 2026-07-22 13:31:00 -04:00
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matrix_keycloak_bot.py Normal file
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import asyncio
import os
import sys
from keycloak import KeycloakAdmin
from keycloak.exceptions import KeycloakError
from nio import (
AsyncClient,
MatrixRoom,
RoomMessageText,
ReactionEvent,
RoomSendResponse,
)
# ------------------------------------------------------------------------------
# Configuration (Set these via environment variables or replace inline)
# ------------------------------------------------------------------------------
MATRIX_HOMESERVER = os.getenv("MATRIX_HOMESERVER", "https://matrix.nest.local")
MATRIX_BOT_USER = os.getenv("MATRIX_BOT_USER", "@access-bot:nest.local")
MATRIX_BOT_PASSWORD = os.getenv("MATRIX_BOT_PASSWORD", "SuperSecretBotPassword")
ADMIN_ROOM_ID = os.getenv("ADMIN_ROOM_ID", "!adminroomid:nest.local")
ADMIN_MATRIX_IDS = set(os.getenv("ADMIN_MATRIX_IDS", "@you:nest.local").split(","))
KEYCLOAK_URL = os.getenv("KEYCLOAK_URL", "https://keycloak.nest.local/")
KEYCLOAK_REALM = os.getenv("KEYCLOAK_REALM", "master")
KEYCLOAK_CLIENT_ID = os.getenv("KEYCLOAK_CLIENT_ID", "nest-matrix-bot")
KEYCLOAK_CLIENT_SECRET = os.getenv("KEYCLOAK_CLIENT_SECRET", "your-client-secret")
# ------------------------------------------------------------------------------
# In-Memory State
# Maps target message event_id -> request metadata
# ------------------------------------------------------------------------------
pending_requests = {}
# ------------------------------------------------------------------------------
# Keycloak Helper Functions
# ------------------------------------------------------------------------------
def get_keycloak_client() -> KeycloakAdmin:
"""Initializes and returns a KeycloakAdmin client using service account credentials."""
return KeycloakAdmin(
server_url=KEYCLOAK_URL,
client_id=KEYCLOAK_CLIENT_ID,
client_secret=KEYCLOAK_CLIENT_SECRET,
realm_name=KEYCLOAK_REALM,
user_realm_name=KEYCLOAK_REALM,
grant_type="client_credentials",
verify=True,
)
def add_user_to_kc_group(username: str, group_name: str) -> tuple[bool, str]:
"""Queries Keycloak for the user and group UUIDs and adds the user to the group."""
try:
kc = get_keycloak_client()
# 1. Fetch User UUID (Assumes Matrix localpart matches Keycloak username)
users = kc.get_users(query={"username": username, "exact": True})
if not users:
return False, f"Keycloak user '{username}' not found."
user_id = users[0]["id"]
# 2. Fetch Group UUID
groups = kc.get_groups()
target_group = next((g for g in groups if g["name"].lower() == group_name.lower()), None)
if not target_group:
return False, f"Keycloak group '{group_name}' not found."
group_id = target_group["id"]
# 3. Assign User to Group
kc.group_user_add(user_id=user_id, group_id=group_id)
return True, f"Successfully added '{username}' to group '{target_group['name']}'."
except KeycloakError as e:
return False, f"Keycloak API error: {str(e)}"
except Exception as e:
return False, f"Unexpected error: {str(e)}"
# ------------------------------------------------------------------------------
# Matrix Event Handlers
# ------------------------------------------------------------------------------
async def on_message(client: AsyncClient, room: MatrixRoom, event: RoomMessageText):
"""Listens for `!request <group_name>` commands."""
# Ignore messages sent by the bot itself
if event.sender == client.user_id:
return
body = event.body.strip()
if not body.startswith("!request"):
return
parts = body.split(maxsplit=1)
if len(parts) < 2:
await client.room_send(
room_id=room.room_id,
message_type="m.room.message",
content={"msgtype": "m.notice", "body": "Usage: !request <group_name>"},
)
return
requested_group = parts[1].strip()
matrix_user = event.sender
# Extract username (e.g., "@alice:nest.local" -> "alice")
kc_username = matrix_user.split(":")[0].lstrip("@")
# Send notification message to the private Admin Room
admin_msg_body = (
f"📋 **Access Request**\n"
f"**User:** `{matrix_user}` (KC Username: `{kc_username}`)\n"
f"**Requested Group:** `{requested_group}`\n\n"
f"React with 👍 to **Approve** or 👎 to **Deny**."
)
res = await client.room_send(
room_id=ADMIN_ROOM_ID,
message_type="m.room.message",
content={
"msgtype": "m.text",
"body": admin_msg_body,
"format": "org.matrix.custom.html",
"formatted_body": admin_msg_body.replace("\n", "<br>"),
},
)
if isinstance(res, RoomSendResponse):
# Store pending request keyed by the admin message event_id
pending_requests[res.event_id] = {
"matrix_user": matrix_user,
"kc_username": kc_username,
"requested_group": requested_group,
"origin_room_id": room.room_id,
}
# Confirm request receipt to the user
await client.room_send(
room_id=room.room_id,
message_type="m.room.message",
content={
"msgtype": "m.notice",
"body": f"Request for group '{requested_group}' submitted for admin approval.",
},
)
async def on_reaction(client: AsyncClient, room: MatrixRoom, event: ReactionEvent):
"""Listens for reaction approvals/denials in the admin room."""
if room.room_id != ADMIN_ROOM_ID:
return
# Verify reactor is an authorized admin
if event.sender not in ADMIN_MATRIX_IDS:
return
relates_to = event.content.get("m.relates_to", {})
target_event_id = relates_to.get("event_id")
emoji = relates_to.get("key")
# Check if this reaction targets an active pending request
if not target_event_id or target_event_id not in pending_requests:
return
request = pending_requests[target_event_id]
if emoji == "👍":
# Execute Keycloak Group Addition
success, msg = add_user_to_kc_group(
request["kc_username"], request["requested_group"]
)
status_text = (
f"✅ **APPROVED** by `{event.sender}`\n"
f"**User:** `{request['matrix_user']}` → **Group:** `{request['requested_group']}`\n"
f"**Result:** {msg}"
)
# Notify requesting user
user_msg = (
f"🎉 Your request for access to group '{request['requested_group']}' "
f"has been approved!" if success else f"⚠️ Approval failed: {msg}"
)
await client.room_send(
room_id=request["origin_room_id"],
message_type="m.room.message",
content={"msgtype": "m.notice", "body": user_msg},
)
elif emoji == "👎":
status_text = (
f"❌ **DENIED** by `{event.sender}`\n"
f"**User:** `{request['matrix_user']}` → **Group:** `{request['requested_group']}`"
)
await client.room_send(
room_id=request["origin_room_id"],
message_type="m.room.message",
content={
"msgtype": "m.notice",
"body": f"Your request for group '{request['requested_group']}' was denied.",
},
)
else:
return # Ignore other reactions
# Update the original admin room message to reflect resolution status
await client.room_send(
room_id=ADMIN_ROOM_ID,
message_type="m.room.message",
content={
"msgtype": "m.text",
"body": status_text,
"format": "org.matrix.custom.html",
"formatted_body": status_text.replace("\n", "<br>"),
"m.relates_to": {"rel_type": "m.replace", "event_id": target_event_id},
},
)
# Clean up request state
del pending_requests[target_event_id]
# ------------------------------------------------------------------------------
# Main Event Loop
# ------------------------------------------------------------------------------
async def main():
client = AsyncClient(MATRIX_HOMESERVER, MATRIX_BOT_USER)
# Register callbacks
client.add_event_callback(
lambda room, event: on_message(client, room, event), RoomMessageText
)
client.add_event_callback(
lambda room, event: on_reaction(client, room, event), ReactionEvent
)
print(f"Connecting to Matrix homeserver {MATRIX_HOMESERVER}...")
await client.login(MATRIX_BOT_PASSWORD)
print(f"Logged in as {MATRIX_BOT_USER}. Syncing...")
await client.sync_forever(timeout=30000, full_state=True)
if __name__ == "__main__":
try:
asyncio.run(main())
except KeyboardInterrupt:
print("\nBot stopped by user.")
sys.exit(0)