From 73f8db0e222de75e51816dac8f6176d73650157f Mon Sep 17 00:00:00 2001
From: KenTandrian <kenricktan11@gmail.com>
Date: Wed, 4 Feb 2026 23:47:29 +0700
Subject: [PATCH] feat(ui): create chart registry

---
 libs/ui/src/lib/chart/chart.registry.ts | 29 +++++++++++++++++++++++++
 libs/ui/src/lib/chart/index.ts          |  1 +
 2 files changed, 30 insertions(+)
 create mode 100644 libs/ui/src/lib/chart/chart.registry.ts
 create mode 100644 libs/ui/src/lib/chart/index.ts

diff --git a/libs/ui/src/lib/chart/chart.registry.ts b/libs/ui/src/lib/chart/chart.registry.ts
new file mode 100644
index 000000000..465d6e716
--- /dev/null
+++ b/libs/ui/src/lib/chart/chart.registry.ts
@@ -0,0 +1,29 @@
+import { getTooltipPositionerMapTop } from '@ghostfolio/common/chart-helper';
+
+import { Tooltip, TooltipPositionerFunction, ChartType } from 'chart.js';
+
+interface VerticalHoverLinePluginOptions {
+  color?: string;
+  width?: number;
+}
+
+declare module 'chart.js' {
+  interface PluginOptionsByType<TType extends ChartType> {
+    verticalHoverLine: TType extends 'line' | 'bar'
+      ? VerticalHoverLinePluginOptions
+      : never;
+  }
+  interface TooltipPositionerMap {
+    top: TooltipPositionerFunction<ChartType>;
+  }
+}
+
+export function registerChartConfiguration() {
+  if (Tooltip.positioners['top']) {
+    return;
+  }
+
+  Tooltip.positioners.top = function (_elements, eventPosition) {
+    return getTooltipPositionerMapTop(this.chart, eventPosition);
+  };
+}
diff --git a/libs/ui/src/lib/chart/index.ts b/libs/ui/src/lib/chart/index.ts
new file mode 100644
index 000000000..2a3d3b358
--- /dev/null
+++ b/libs/ui/src/lib/chart/index.ts
@@ -0,0 +1 @@
+export * from './chart.registry';