From 45fe295caa633d0477796a028f1e93382a2a2ce9 Mon Sep 17 00:00:00 2001
From: Vyr Cossont <VyrCossont@users.noreply.github.com>
Date: Tue, 4 Jun 2024 02:33:39 -0700
Subject: [PATCH] Compile filter keyword regexps when touched through PutFilter
 or UpdateFilter (#2951)

Followup to #2903
---
 internal/db/bundb/filter.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/internal/db/bundb/filter.go b/internal/db/bundb/filter.go
index 30a8494a7..2ac9f6a81 100644
--- a/internal/db/bundb/filter.go
+++ b/internal/db/bundb/filter.go
@@ -154,6 +154,13 @@ func (f *filterDB) populateFilter(ctx context.Context, filter *gtsmodel.Filter)
 }
 
 func (f *filterDB) PutFilter(ctx context.Context, filter *gtsmodel.Filter) error {
+	// Pre-compile filter keyword regular expressions.
+	for _, filterKeyword := range filter.Keywords {
+		if err := filterKeyword.Compile(); err != nil {
+			return gtserror.Newf("error compiling filter keyword regex: %w", err)
+		}
+	}
+
 	// Update database.
 	if err := f.db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
 		if _, err := tx.
@@ -225,6 +232,13 @@ func (f *filterDB) UpdateFilter(
 		}
 	}
 
+	// Pre-compile filter keyword regular expressions.
+	for _, filterKeyword := range filter.Keywords {
+		if err := filterKeyword.Compile(); err != nil {
+			return gtserror.Newf("error compiling filter keyword regex: %w", err)
+		}
+	}
+
 	// Update database.
 	if err := f.db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
 		if _, err := tx.