now() throws error when using SQLite3

Author: grimpirate

system/Session/Handlers/DatabaseHandler.php

@@ -196,7 +196,7 @@ public function write($id, $data): bool
                 'data'       => $this->prepareData($data),
             ];
 
-            if (! $this->db->table($this->table)->set('timestamp', 'now()', false)->insert($insertData)) {
+            if (! $this->db->table($this->table)->set('timestamp', $this->now(), false)->insert($insertData)) {
                 return $this->fail();
             }
 
@@ -218,7 +218,7 @@ public function write($id, $data): bool
             $updateData['data'] = $this->prepareData($data);
         }
 
-        if (! $builder->set('timestamp', 'now()', false)->update($updateData)) {
+        if (! $builder->set('timestamp', $this->now(), false)->update($updateData)) {
             return $this->fail();
         }
 
@@ -287,7 +287,7 @@ public function gc($max_lifetime)
 
         return $this->db->table($this->table)->where(
             'timestamp <',
-            "now() - INTERVAL {$interval}",
+            $this->now($interval),
             false
         )->delete() ? 1 : $this->fail();
     }
@@ -304,4 +304,25 @@ protected function releaseLock(): bool
         // Unsupported DB? Let the parent handle the simple version.
         return parent::releaseLock();
     }
+
+    /**
+     * Determines which NOW function to use based on DBDriver
+     * 
+     * @param string $interval Amount of time to subtract from NOW
+     */
+    private function now($interval = null): string
+    {
+        $DBDriver = service('settings')->get("Database.{$this->DBGroup}")['DBDriver'];
+        return !is_null($interval)
+        ? match($DBDriver)
+        {
+            'SQLite3' => "datetime('now', '-{$interval}')",
+            default => "now() - INTERVAL {$interval}",
+        }
+        : match($DBDriver)
+        {
+            'SQLite3' => "datetime('now')",
+            default => "now()",
+        };
+    }
 }