1 files changed, 9 insertions, 2 deletions
diff --git a/scripts/park-editor.mjs b/scripts/park-editor.mjs
index a872008..d0c08da 100644
--- a/scripts/park-editor.mjs
+++ b/scripts/park-editor.mjs
@@ -9,7 +9,7 @@
 //
 // 注意: ローカル（127.0.0.1）にのみ公開します。追加パッケージは不要です。
 import { createServer } from "node:http";
-import { readFile, writeFile } from "node:fs/promises";
+import { readFile, writeFile, rename } from "node:fs/promises";
 import { fileURLToPath } from "node:url";
 import { dirname, join } from "node:path";
 
@@ -103,7 +103,14 @@ const server = createServer(async (req, res) => {
       const text = target.dataset.pretty
         ? `${JSON.stringify(data, null, 2)}\n`
         : `${JSON.stringify(data)}\n`;
-      await writeFile(target.dataset.path, text, "utf-8");
+      if (text.includes("\uFFFD")) {
+        throw new Error(
+          "文字化け（U+FFFD）が含まれているため保存を中止しました。入力内容を確認してください。",
+        );
+      }
+      const tmp = `${target.dataset.path}.tmp`;
+      await writeFile(tmp, text, "utf-8");
+      await rename(tmp, target.dataset.path);
 
       const count = target.id === "nearbyParks" ? data.features.length : data.length;
       console.log(`保存しました: ${target.dataset.label} ${count}件 → ${target.dataset.path}`);