feat: create new endpoint to retrieve summary of different alerts

Closes: #1200

Author: yrobla

src/codegate/api/v1.py

@@ -397,6 +397,33 @@ async def get_workspace_alerts(workspace_name: str) -> List[Optional[v1_models.A
         raise HTTPException(status_code=500, detail="Internal server error")
 
 
+@v1.get(
+    "/workspaces/{workspace_name}/alerts-summary",
+    tags=["Workspaces"],
+    generate_unique_id_function=uniq_name,
+)
+async def get_workspace_alerts_summary(workspace_name: str) -> v1_models.AlertSummary:
+    """Get alert summary for a workspace."""
+    try:
+        ws = await wscrud.get_workspace_by_name(workspace_name)
+    except crud.WorkspaceDoesNotExistError:
+        raise HTTPException(status_code=404, detail="Workspace does not exist")
+    except Exception:
+        logger.exception("Error while getting workspace")
+        raise HTTPException(status_code=500, detail="Internal server error")
+
+    try:
+        summary = await dbreader.get_alerts_summary_by_workspace(ws.id)
+        return v1_models.AlertSummary(
+            malicious_packages=summary["codegate_context_retriever_count"],
+            pii=summary["codegate_pii_count"],
+            secrets=summary["codegate_secrets_count"],
+        )
+    except Exception:
+        logger.exception("Error while getting alerts summary")
+        raise HTTPException(status_code=500, detail="Internal server error")
+
+
 @v1.get(
     "/workspaces/{workspace_name}/messages",
     tags=["Workspaces"],

src/codegate/api/v1_models.py

@@ -190,6 +190,16 @@ def from_db_model(db_model: db_models.Alert) -> "Alert":
     timestamp: datetime.datetime
 
 
+class AlertSummary(pydantic.BaseModel):
+    """
+    Represents a set of summary alerts
+    """
+
+    malicious_packages: int
+    pii: int
+    secrets: int
+
+
 class PartialQuestionAnswer(pydantic.BaseModel):
     """
     Represents a partial conversation.

src/codegate/db/connection.py

@@ -746,6 +746,35 @@ async def get_alerts_by_workspace(
         )
         return prompts
 
+    async def get_alerts_summary_by_workspace(self, workspace_id: str) -> dict:
+        """Get aggregated alert summary counts for a given workspace_id."""
+        sql = text(
+            """
+            SELECT 
+                COUNT(*) AS total_alerts,
+                SUM(CASE WHEN a.trigger_type = 'codegate-secrets' THEN 1 ELSE 0 END) AS codegate_secrets_count,
+                SUM(CASE WHEN a.trigger_type = 'codegate-context-retriever' THEN 1 ELSE 0 END) AS codegate_context_retriever_count,
+                SUM(CASE WHEN a.trigger_type = 'codegate-pii' THEN 1 ELSE 0 END) AS codegate_pii_count
+            FROM alerts a
+            INNER JOIN prompts p ON p.id = a.prompt_id
+            WHERE p.workspace_id = :workspace_id
+            """
+        )
+        conditions = {"workspace_id": workspace_id}
+
+        async with self._async_db_engine.begin() as conn:
+            result = await conn.execute(sql, conditions)
+            row = result.fetchone()
+
+        # Return a dictionary with counts (handling None values safely)
+        return {
+            "codegate_secrets_count": row.codegate_secrets_count or 0 if row else 0,
+            "codegate_context_retriever_count": (
+                row.codegate_context_retriever_count or 0 if row else 0
+            ),
+            "codegate_pii_count": row.codegate_pii_count or 0 if row else 0,
+        }
+
     async def get_workspaces(self) -> List[WorkspaceWithSessionInfo]:
         sql = text(
             """