From 0def23b2b5b5d5ef943ef3fb942b690fb9831263 Mon Sep 17 00:00:00 2001
From: tsmethurst <tobi.smethurst@protonmail.com>
Date: Fri, 10 Sep 2021 21:46:32 +0200
Subject: [PATCH] bun trace logging hooks

---
 internal/db/bundb/bundb.go |  5 ++++
 internal/db/bundb/trace.go | 50 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 internal/db/bundb/trace.go

diff --git a/internal/db/bundb/bundb.go b/internal/db/bundb/bundb.go
index 7ddcab5c7..600de9a59 100644
--- a/internal/db/bundb/bundb.go
+++ b/internal/db/bundb/bundb.go
@@ -147,6 +147,11 @@ func NewBunDBService(ctx context.Context, c *config.Config, log *logrus.Logger)
 		return nil, fmt.Errorf("database type %s not supported for bundb", strings.ToLower(c.DBConfig.Type))
 	}
 
+	if log.Level >= logrus.TraceLevel {
+		// add a hook to just log queries and the time they take
+		conn.DB.AddQueryHook(&debugQueryHook{log: log})
+	}
+
 	// actually *begin* the connection so that we can tell if the db is there and listening
 	if err := conn.Ping(); err != nil {
 		return nil, fmt.Errorf("db connection error: %s", err)
diff --git a/internal/db/bundb/trace.go b/internal/db/bundb/trace.go
new file mode 100644
index 000000000..3c0df4442
--- /dev/null
+++ b/internal/db/bundb/trace.go
@@ -0,0 +1,50 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package bundb
+
+import (
+	"context"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/uptrace/bun"
+)
+
+// queryHook is just a wrapper for bun.QueryHook
+type queryHook bun.QueryHook
+
+// debugQueryHook implements queryHook
+type debugQueryHook struct {
+	log *logrus.Logger
+}
+
+func (q *debugQueryHook) BeforeQuery(ctx context.Context, event *bun.QueryEvent) context.Context {
+	// do nothing
+	return ctx
+}
+
+// AfterQuery logs the time taken to query, the operation (select, update, etc), and the query itself as translated by bun.
+func (q *debugQueryHook) AfterQuery(ctx context.Context, event *bun.QueryEvent) {
+	dur := time.Now().Sub(event.StartTime).Round(time.Microsecond)
+	l := q.log.WithFields(logrus.Fields{
+		"queryTime": dur,
+		"operation": event.Operation(),
+	})
+	l.Trace(event.Query)
+}