From aff1a95c2fa4b9ef2581c5b573623d65865ad0b8 Mon Sep 17 00:00:00 2001
From: robonen <robonenandrew@gmail.com>
Date: Sat, 19 Oct 2024 06:43:29 +0700
Subject: [PATCH] feat(packages/vue): add useClamp composable

---
 .../src/composables/useClamp/index.test.ts    | 60 +++++++++++++++++++
 .../vue/src/composables/useClamp/index.ts     | 37 ++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 packages/vue/src/composables/useClamp/index.test.ts
 create mode 100644 packages/vue/src/composables/useClamp/index.ts

diff --git a/packages/vue/src/composables/useClamp/index.test.ts b/packages/vue/src/composables/useClamp/index.test.ts
new file mode 100644
index 0000000..e7daca8
--- /dev/null
+++ b/packages/vue/src/composables/useClamp/index.test.ts
@@ -0,0 +1,60 @@
+import { ref, readonly, computed } from 'vue';
+import { describe, it, expect } from 'vitest';
+import { useClamp } from '.';
+
+describe('useClamp', () => {
+  it('non-reactive values should be clamped', () => {
+    const clampedValue = useClamp(10, 0, 5);
+
+    expect(clampedValue.value).toBe(5);
+  });
+
+  it('clamp the value within the given range', () => {
+    const value = ref(10);
+    const clampedValue = useClamp(value, 0, 5);
+
+    expect(clampedValue.value).toBe(5);
+  });
+
+  it('clamp the value within the given range using functions', () => {
+    const value = ref(10);
+    const clampedValue = useClamp(value, () => 0, () => 5);
+
+    expect(clampedValue.value).toBe(5);
+  });
+
+  it('clamp readonly values', () => {
+    const computedValue = computed(() => 10);
+    const readonlyValue = readonly(ref(10));
+    const clampedValue1 = useClamp(computedValue, 0, 5);
+    const clampedValue2 = useClamp(readonlyValue, 0, 5);
+
+    expect(clampedValue1.value).toBe(5);
+    expect(clampedValue2.value).toBe(5);
+  });
+
+  it('update the clamped value when the original value changes', () => {
+    const value = ref(10);
+    const clampedValue = useClamp(value, 0, 5);
+    value.value = 3;
+
+    expect(clampedValue.value).toBe(3);
+  });
+
+  it('update the clamped value when the min or max changes', () => {
+    const value = ref(10);
+    const min = ref(0);
+    const max = ref(5);
+    const clampedValue = useClamp(value, min, max);
+
+    expect(clampedValue.value).toBe(5);
+
+    max.value = 15;
+
+    expect(clampedValue.value).toBe(10);
+
+    min.value = 11;
+
+    expect(clampedValue.value).toBe(11);
+  });
+});
\ No newline at end of file
diff --git a/packages/vue/src/composables/useClamp/index.ts b/packages/vue/src/composables/useClamp/index.ts
new file mode 100644
index 0000000..2ed2d47
--- /dev/null
+++ b/packages/vue/src/composables/useClamp/index.ts
@@ -0,0 +1,37 @@
+import { clamp, isFunction } from '@robonen/stdlib';
+import { computed, isReadonly, ref, toValue, type ComputedRef, type MaybeRef, type MaybeRefOrGetter, type WritableComputedRef } from 'vue';
+
+/**
+ * @name useClamp
+ * @category Math
+ * @description Clamps a value between a minimum and maximum value
+ * 
+ * @param {MaybeRefOrGetter<number>} value The value to clamp
+ * @param {MaybeRefOrGetter<number>} min The minimum value
+ * @param {MaybeRefOrGetter<number>} max The maximum value
+ * @returns {ComputedRef<number>} The clamped value
+ * 
+ * @example
+ * const value = ref(10);
+ * const clampedValue = useClamp(value, 0, 5);
+ * 
+ * @example
+ * const value = ref(10);
+ * const clampedValue = useClamp(value, () => 0, () => 5);
+ */
+export function useClamp(value: MaybeRef<number>, min: MaybeRefOrGetter<number>, max: MaybeRefOrGetter<number>): WritableComputedRef<number>;
+export function useClamp(value: MaybeRefOrGetter<number>, min: MaybeRefOrGetter<number>, max: MaybeRefOrGetter<number>): ComputedRef<number> {
+  if (isFunction(value) || isReadonly(value))
+    return computed(() => clamp(toValue(value), toValue(min), toValue(max)));
+
+  const _value = ref(value);
+
+  return computed<number>({
+    get() {
+      return clamp(_value.value, toValue(min), toValue(max));
+    },
+    set(newValue) {
+      _value.value = clamp(newValue, toValue(min), toValue(max));
+    },
+  });
+}