From ff1acb823a3ac4b07b1b88cfedac77e6ef7bcf1e Mon Sep 17 00:00:00 2001
From: Beeno Tung <aabbcc1241@yahoo.com.hk>
Date: Wed, 10 Apr 2024 01:45:49 +0800
Subject: [PATCH] feat: auto setup synchronous pragma when establish connection
 to database

---
 index.d.ts      | 2 ++
 src/database.js | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/index.d.ts b/index.d.ts
index b18ee90..9cfb933 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -22,6 +22,8 @@ declare namespace BetterSqlite3Helper {
     fileMustExist?: boolean;
     /** Whether to automatically enable 'PRAGMA journal_mode = WAL'. Default: true */
     WAL?: boolean;
+    /** Automatically enable 'PRAGMA synchronous = ?'. Default: 'NORMAL' for WAL, 'FULL' for non-WAL */
+    synchronous?: 0 | 'OFF' | 1 | 'NORMAL' | 2 | 'FULL' | 3 | 'EXTRA';
     /** Migration options. Disable completely by setting `migrate: false` */
     migrate?: MigrationOptions | false;
   };
diff --git a/src/database.js b/src/database.js
index 2972b5b..75e520e 100644
--- a/src/database.js
+++ b/src/database.js
@@ -31,13 +31,16 @@ function DB (options = {}) {
     instance = instance || new DB(...arguments)
     return instance
   }
+  let WAL = options.WAL || true
+  let synchronous = WAL ? 'NORMAL' : 'FULL'
   this.options = Object.assign(
     {
       path: dbFile,
       migrate: true,
       readonly: false,
       fileMustExist: false,
-      WAL: true
+      WAL,
+      synchronous,
     },
     options
   )
@@ -98,6 +101,7 @@ DB.prototype.connection = function () {
   if (this.options.WAL) {
     this.db.pragma('journal_mode = WAL')
   }
+  this.db.pragma('synchronous = ' + this.options.synchronous)
   if (this.options.migrate) {
     this.migrate(
       typeof this.options.migrate === 'object' ? this.options.migrate : {}