progress

website/src/lib/components/collapsible-tree/utils.svelte.ts

@@ -0,0 +1,31 @@
+export class CollapsibleNodeState {
+    private _open: boolean;
+
+    constructor(defaultState: 'open' | 'closed') {
+        this._open = $state(defaultState === 'open');
+    }
+
+    get current(): boolean {
+        return this._open;
+    }
+
+    set current(value: boolean) {
+        this._open = value;
+    }
+}
+
+export class CollapsibleTreeState {
+    private _open: Record<string, CollapsibleNodeState> = {};
+    private _defaultState: 'open' | 'closed';
+
+    constructor(defaultState: 'open' | 'closed') {
+        this._defaultState = defaultState;
+    }
+
+    get(id: string): CollapsibleNodeState {
+        if (this._open[id] === undefined) {
+            this._open[id] = new CollapsibleNodeState(this._defaultState);
+        }
+        return this._open[id];
+    }
+}