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71c1ad2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | # app/services/mongo_service.py
# Async MongoDB client for moderation logs and user history
from datetime import datetime, timezone
from typing import Any
from app.config import get_settings
from app.observability.logging import get_logger
logger = get_logger(__name__)
class MongoService:
"""
Async MongoDB client using Motor.
Collections:
- moderation_logs: Full pipeline run traces
- user_history: Aggregated user moderation stats
"""
def __init__(self):
self.settings = get_settings()
self.client = None
self.db = None
self._connected = False
async def connect(self) -> None:
"""Establish MongoDB connection."""
try:
from motor.motor_asyncio import AsyncIOMotorClient
self.client = AsyncIOMotorClient(
self.settings.mongodb_uri,
serverSelectionTimeoutMS=5000,
)
# Verify connection
await self.client.server_info()
self.db = self.client[self.settings.mongodb_db_name]
self._connected = True
logger.info("mongodb_connected", db=self.settings.mongodb_db_name)
# Create indexes
await self._create_indexes()
except Exception as e:
logger.warning("mongodb_connection_failed", error=str(e))
self._connected = False
async def _create_indexes(self) -> None:
"""Create necessary indexes for performance."""
try:
# moderation_logs indexes
logs = self.db["moderation_logs"]
await logs.create_index("user_id")
await logs.create_index("created_at")
await logs.create_index([("user_id", 1), ("created_at", -1)])
# user_history indexes
history = self.db["user_history"]
await history.create_index("user_id", unique=True)
logger.info("mongodb_indexes_created")
except Exception as e:
logger.warning("mongodb_index_creation_failed", error=str(e))
async def disconnect(self) -> None:
"""Close MongoDB connection."""
if self.client:
self.client.close()
self._connected = False
logger.info("mongodb_disconnected")
# ---- Moderation Logs ----
async def log_moderation(self, log_entry: dict) -> str | None:
"""
Store a complete moderation pipeline run.
Args:
log_entry: Full pipeline result including input, scores, decisions.
Returns:
Inserted document ID or None.
"""
if not self._connected:
return None
try:
log_entry["created_at"] = datetime.now(timezone.utc)
result = await self.db["moderation_logs"].insert_one(log_entry)
logger.debug("moderation_logged", doc_id=str(result.inserted_id))
return str(result.inserted_id)
except Exception as e:
logger.error("moderation_log_failed", error=str(e))
return None
async def get_moderation_history(
self,
user_id: str,
limit: int = 20,
skip: int = 0,
) -> list[dict]:
"""Get moderation history for a user."""
if not self._connected:
return []
try:
cursor = (
self.db["moderation_logs"]
.find({"user_id": user_id})
.sort("created_at", -1)
.skip(skip)
.limit(limit)
)
results = []
async for doc in cursor:
doc["_id"] = str(doc["_id"])
results.append(doc)
return results
except Exception as e:
logger.error("history_fetch_failed", error=str(e))
return []
# ---- User History (aggregated stats) ----
async def get_user_history(self, user_id: str) -> dict | None:
"""Get aggregated moderation stats for a user."""
if not self._connected:
return None
try:
doc = await self.db["user_history"].find_one({"user_id": user_id})
if doc:
doc["_id"] = str(doc["_id"])
return doc
except Exception as e:
logger.error("user_history_fetch_failed", error=str(e))
return None
async def update_user_history(self, user_id: str, moderation_result: dict) -> None:
"""
Update aggregated user history after a moderation event.
Tracks:
- total_scans, total_violations, total_warnings
- violation_categories (count per category)
- last_violation_at
- risk_trend (recent violation rate)
"""
if not self._connected:
return
try:
risk_level = moderation_result.get("risk_level", "LOW")
categories = moderation_result.get("categories", [])
update_ops: dict[str, Any] = {
"$inc": {"total_scans": 1},
"$set": {"last_scan_at": datetime.now(timezone.utc)},
"$setOnInsert": {"user_id": user_id, "created_at": datetime.now(timezone.utc)},
}
if risk_level == "HIGH":
update_ops["$inc"]["total_violations"] = 1
update_ops["$set"]["last_violation_at"] = datetime.now(timezone.utc)
for cat in categories:
update_ops["$inc"][f"violation_categories.{cat}"] = 1
elif risk_level == "MEDIUM":
update_ops["$inc"]["total_warnings"] = 1
await self.db["user_history"].update_one(
{"user_id": user_id},
update_ops,
upsert=True,
)
except Exception as e:
logger.error("user_history_update_failed", error=str(e))
@property
def is_connected(self) -> bool:
return self._connected
# Global singleton
mongo_service = MongoService()
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