From aba2a30b1202c19fa7b77f0647d5031272031405 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Boukorras?= <jerome.boukorras@onfido.com>
Date: Mon, 27 May 2024 15:06:22 +0200
Subject: [PATCH] feat: add switch component

---
 packages/core/src/components/index.scss       |   3 +
 packages/core/src/components/index.ts         |   1 +
 .../core/src/components/switch/switch.scss    | 132 ++++++++++++++++++
 packages/core/src/components/switch/switch.ts |   4 +
 packages/react/src/components/index.ts        |   1 +
 .../src/components/switch/switch.stories.tsx  |  62 ++++++++
 .../react/src/components/switch/switch.tsx    |  28 ++++
 7 files changed, 231 insertions(+)
 create mode 100644 packages/core/src/components/switch/switch.scss
 create mode 100644 packages/core/src/components/switch/switch.ts
 create mode 100644 packages/react/src/components/switch/switch.stories.tsx
 create mode 100644 packages/react/src/components/switch/switch.tsx

diff --git a/packages/core/src/components/index.scss b/packages/core/src/components/index.scss
index fc1dd84aa..93892b2e6 100644
--- a/packages/core/src/components/index.scss
+++ b/packages/core/src/components/index.scss
@@ -44,6 +44,8 @@
 @forward './validation/validation';
 @use './accordion/accordion.scss';
 @forward './accordion/accordion.scss';
+@use './switch/switch.scss';
+@forward './switch/switch.scss';
 
 @mixin components() {
   @include asterisk.Asterisk();
@@ -69,4 +71,5 @@
   @include tooltip.Tooltip();
   @include validation.Validation();
   @include accordion.Accordion();
+  @include switch.Switch();
 }
diff --git a/packages/core/src/components/index.ts b/packages/core/src/components/index.ts
index cf9e912c1..faa986538 100644
--- a/packages/core/src/components/index.ts
+++ b/packages/core/src/components/index.ts
@@ -12,6 +12,7 @@ export * from './progress/progress';
 export * from './radio/radio';
 export * from './select/select';
 export * from './spinner/spinner';
+export * from './switch/switch';
 export * from './textarea/textarea';
 export * from './tooltip/tooltip';
 export * from './validation/validation';
diff --git a/packages/core/src/components/switch/switch.scss b/packages/core/src/components/switch/switch.scss
new file mode 100644
index 000000000..3dea19757
--- /dev/null
+++ b/packages/core/src/components/switch/switch.scss
@@ -0,0 +1,132 @@
+/* stylelint-disable selector-max-compound-selectors */
+
+@use '../../animations';
+@use '../../helpers';
+@use '../../mixins';
+
+@mixin Switch() {
+  @if not mixins.includes('Switch') {
+    @include _Switch();
+  }
+}
+
+@mixin _Switch() {
+  .ods-switch-label {
+    align-items: center;
+    color: helpers.color('content-main');
+    cursor: pointer;
+    display: inline-flex;
+    gap: helpers.space(1);
+    position: relative;
+
+    input {
+      opacity: 0;
+      pointer-events: none;
+      position: absolute;
+    }
+
+    // Hover
+    input + .ods-switch-indicator:hover {
+      border-color: #636670;
+    }
+
+    input + .ods-switch-indicator:hover::before {
+      background-color: #636670;
+    }
+
+    // Checked
+    input:checked + .ods-switch-indicator {
+      background-color: helpers.color('background-input-selected');
+      border-color: helpers.color('border-input-selected');
+    }
+
+    input:checked + .ods-switch-indicator::before {
+      background-color: helpers.color('background-input');
+      transform: translateY(-50%) translateX(helpers.space(2));
+    }
+
+    input:checked + .ods-switch-indicator .ods-icon {
+      opacity: 1;
+      transform: translateY(-50%) translateX(helpers.space(2));
+    }
+
+    input:checked + .ods-switch-indicator:hover {
+      background-color: #5666f9;
+      border-color: #5666f9;
+    }
+
+    input:checked + .ods-switch-indicator:hover .ods-icon {
+      border-color: #5666f9;
+    }
+
+    // Focus
+    input:focus + .ods-switch-indicator {
+      box-shadow: //
+        0 0 0 helpers.space(0.25) helpers.color('border-focus-inner'),
+        0 0 0 helpers.space(0.5) helpers.color('border-action-focus');
+    }
+
+    // Disabled
+    input:disabled + .ods-switch-indicator {
+      cursor: not-allowed;
+    }
+
+    input:disabled + .ods-switch-indicator,
+    input:disabled + .ods-switch-indicator:hover,
+    input:disabled + .ods-switch-indicator .ods-icon,
+    input:disabled + .ods-switch-indicator:hover .ods-icon {
+      border-color: helpers.color('border-disabled');
+    }
+
+    input:disabled:checked + .ods-switch-indicator,
+    input:disabled + .ods-switch-indicator::before {
+      background-color: helpers.color('background-disabled');
+    }
+
+    input:disabled:checked + .ods-switch-indicator::before {
+      background-color: #fff;
+    }
+  }
+
+  .ods-switch-indicator {
+    $border-width: helpers.space(0.25);
+
+    background-color: helpers.color('background-input');
+    border: $border-width solid helpers.color('border-input');
+    border-radius: helpers.border-radius('full');
+    box-sizing: border-box;
+    height: helpers.space(3);
+    margin: helpers.space(1.5) helpers.space(1);
+    position: relative;
+    width: helpers.space(5);
+
+    // slider
+    &::before {
+      background-color: #828893;
+      border-radius: helpers.border-radius('full');
+      content: '';
+      display: inline-block;
+      height: 18px;
+      left: 1px;
+      position: absolute;
+      top: 50%;
+      transform: translateY(-50%);
+      transition: transform calc(var(--ods-transition-duration) * 2) ease-out;
+      width: 18px;
+    }
+
+    // check icon
+    .ods-icon {
+      content: '';
+      fill: helpers.color('border-input-selected');
+      height: helpers.space(2);
+      left: 2px;
+      opacity: 0;
+      position: absolute;
+      top: calc(50% - 1px);
+      transform: translateY(-50%) translateX(0);
+      transition: transform calc(var(--ods-transition-duration) * 2) ease-out;
+      width: helpers.space(2);
+    }
+  }
+}
diff --git a/packages/core/src/components/switch/switch.ts b/packages/core/src/components/switch/switch.ts
new file mode 100644
index 000000000..1403d1ed3
--- /dev/null
+++ b/packages/core/src/components/switch/switch.ts
@@ -0,0 +1,4 @@
+export interface SwitchProps {
+  disabled?: boolean;
+  checked?: boolean;
+}
diff --git a/packages/react/src/components/index.ts b/packages/react/src/components/index.ts
index b19eb3447..7c2efbe88 100644
--- a/packages/react/src/components/index.ts
+++ b/packages/react/src/components/index.ts
@@ -20,6 +20,7 @@ export * from './select/option';
 export * from './select/option-group';
 export * from './select/select';
 export * from './spinner/spinner';
+export * from './switch/switch';
 export * from './textarea/textarea';
 export * from './tooltip/tooltip';
 export * from './validation/validation';
diff --git a/packages/react/src/components/switch/switch.stories.tsx b/packages/react/src/components/switch/switch.stories.tsx
new file mode 100644
index 000000000..9a6d6dbed
--- /dev/null
+++ b/packages/react/src/components/switch/switch.stories.tsx
@@ -0,0 +1,62 @@
+import { color, type SwitchProps } from '@onfido/castor';
+import { Field, FieldLabel, Fieldset, Switch } from '@onfido/castor-react';
+import React, { useState, type ChangeEvent } from 'react';
+import { Meta, Story } from '../../../../../docs';
+
+export default {
+  title: 'React/Switch',
+  component: Switch,
+  argTypes: {
+    checked: {
+      type: 'boolean',
+    },
+    children: { description: 'Acts as a label for the `<input>`.' },
+    disabled: {
+      type: 'boolean',
+    },
+  },
+  args: {
+    children: '',
+  },
+  parameters: {},
+} as Meta<SwitchProps>;
+
+export const Playground: Story<SwitchProps> = {};
+
+export const Examples: Story<SwitchProps> = {
+  render: () => {
+    const [switchState, setSwitchState] = useState(true);
+    const handleOnChange = (event: ChangeEvent<HTMLInputElement>) => {
+      setSwitchState(event.target.checked);
+    };
+
+    return (
+      <Fieldset>
+        <Field>
+          <Switch id="test1">
+            <FieldLabel htmlFor="test1" style={{ width: 250 }}>
+              Label
+            </FieldLabel>
+          </Switch>
+        </Field>
+        <Field>
+          <Switch id="test2" disabled>
+            <FieldLabel
+              htmlFor="test2"
+              style={{ width: 250, color: color('content-disabled') }}
+            >
+              Label with disabled switch
+            </FieldLabel>
+          </Switch>
+        </Field>
+        <Field>
+          <Switch id="test3" checked={switchState} onChange={handleOnChange}>
+            <FieldLabel htmlFor="test3" style={{ width: 250 }}>
+              Label with checked switch
+            </FieldLabel>
+          </Switch>
+        </Field>
+      </Fieldset>
+    );
+  },
+};
diff --git a/packages/react/src/components/switch/switch.tsx b/packages/react/src/components/switch/switch.tsx
new file mode 100644
index 000000000..e8c5f2825
--- /dev/null
+++ b/packages/react/src/components/switch/switch.tsx
@@ -0,0 +1,28 @@
+import { c, classy, m, type SwitchProps as BaseProps } from '@onfido/castor';
+import React, { type FC } from 'react';
+import { Icon } from '../icon/icon';
+
+let idCount = 0;
+
+export const Switch: FC<SwitchProps> = ({
+  id = `castor_switch_${++idCount}`,
+  disabled,
+  className,
+  children,
+  ...props
+}) => (
+  <label
+    htmlFor={id}
+    className={classy(className, c('switch-label'), m({ disabled }))}
+  >
+    {children && <span>{children}</span>}
+    <input {...props} type="checkbox" id={id} disabled={disabled} />
+    <span className={classy(c('switch-indicator'), m({ disabled }))}>
+      <Icon name="check" aria-hidden="true" />
+    </span>
+  </label>
+);
+
+export type SwitchProps = BaseProps & Omit<SwitchElementProps, 'children'>;
+
+type SwitchElementProps = JSX.IntrinsicElements['input'];