hmm, weird db error

src/server/index.ts

@@ -149,7 +149,7 @@ io.on('connection', (socket) => {
   });
 
   socket.on('color', ({ c, x, y, t }: Placement) => {
-    if (!user || c > 0xffffff || c < 0) {
+    if (!user || c > 0xffffff || c < 0 || c === null) {
       return;
     }
 

src/server/object/history.ts

@@ -19,13 +19,14 @@ export class History {
   }
 
   async insert(record: CanvasRecord): Promise<void> {
+    const color = record.color ? record.color : 0;
     await this.db.run(
       `INSERT INTO Placement (user, x, y, ts, color) VALUES (?,?,?,?,?)`,
       record.user,
       record.x,
       record.y,
       record.ts,
-      record.color,
+      color,
     );
   }
 

src/server/object/imager.ts

@@ -14,6 +14,7 @@ export class Imager {
     private _size: number,
     private _store = join(__dirname, '..', '..', '..', 'canvas.png'),
     private _debounce = 5000,
+    private _resaveInterval = 60000,
   ) {}
 
   async toImage(array: Uint32Array): Promise<Buffer> {
@@ -81,7 +82,7 @@ export class Imager {
       this._lastSave = Date.now();
     };
 
-    if (force || this._lastSave < Date.now() - this._debounce * 2) {
+    if (force || this._lastSave < Date.now() - this._resaveInterval) {
       saveFn().catch((e) => console.error(e));
       return;
     }