From 537b641eadbe28efcbd2e8376b91b896e8e9b873 Mon Sep 17 00:00:00 2001
From: lwih <louis.hache@beta.gouv.fr>
Date: Tue, 2 Apr 2024 13:52:22 +0200
Subject: [PATCH] feat(components): introduce Banner component

---
 e2e/base/components/Banner.spec.tsx           |  69 ++++++++++
 .../Banner/__tests__/getBannerPalette.test.ts |  29 +++++
 src/components/Banner/index.tsx               | 122 ++++++++++++++++++
 src/components/Banner/utils.ts                |  25 ++++
 src/index.ts                                  |   2 +
 stories/components/Banner.stories.tsx         |  53 ++++++++
 6 files changed, 300 insertions(+)
 create mode 100644 e2e/base/components/Banner.spec.tsx
 create mode 100644 src/components/Banner/__tests__/getBannerPalette.test.ts
 create mode 100644 src/components/Banner/index.tsx
 create mode 100644 src/components/Banner/utils.ts
 create mode 100644 stories/components/Banner.stories.tsx

diff --git a/e2e/base/components/Banner.spec.tsx b/e2e/base/components/Banner.spec.tsx
new file mode 100644
index 000000000..37211b598
--- /dev/null
+++ b/e2e/base/components/Banner.spec.tsx
@@ -0,0 +1,69 @@
+import { StoryBox } from '../../../.storybook/components/StoryBox'
+import { Level } from '../../../src'
+import { _Banner as BannerStory } from '../../../stories/components/Banner.stories'
+import { mountAndWait } from '../utils'
+
+context(`Story`, () => {
+  describe('default visibility', () => {
+    it('should not show the banner when isHiddenByDefault is true', () => {
+      mountAndWait(
+        <StoryBox>
+          <BannerStory isClosable={false} isCollapsible isHiddenByDefault level={Level.SUCCESS} top="60px">
+            some text
+          </BannerStory>
+        </StoryBox>
+      )
+      cy.get('.banner').should('not.be.visible')
+    })
+    it('should show the banner when isHiddenByDefault is false', () => {
+      mountAndWait(
+        <StoryBox>
+          <BannerStory isClosable={false} isCollapsible isHiddenByDefault={false} level={Level.SUCCESS} top="60px">
+            some text
+          </BannerStory>
+        </StoryBox>
+      )
+      cy.get('.banner').should('be.visible')
+    })
+    it('should show the banner when isHiddenByDefault is undefined', () => {
+      mountAndWait(
+        <StoryBox>
+          <BannerStory isClosable={false} isCollapsible isHiddenByDefault={undefined} level={Level.SUCCESS} top="60px">
+            some text
+          </BannerStory>
+        </StoryBox>
+      )
+      cy.get('.banner').should('be.visible')
+    })
+  })
+  describe('closable version', () => {
+    it('should disappear when the action button is clicked', () => {
+      mountAndWait(
+        <StoryBox>
+          <BannerStory isClosable isCollapsible={false} isHiddenByDefault={false} level={Level.SUCCESS} top="60px">
+            some text
+          </BannerStory>
+        </StoryBox>
+      )
+      cy.get('.banner-button').click()
+      cy.get('.banner').should('not.be.visible')
+    })
+  })
+  describe('collapsible version', () => {
+    it('should collapse when the action button is clicked', () => {
+      mountAndWait(
+        <StoryBox>
+          <BannerStory isClosable={false} isCollapsible isHiddenByDefault={false} level={Level.SUCCESS} top="60px">
+            some text
+          </BannerStory>
+        </StoryBox>
+      )
+      // check it's fully opened
+      cy.get('.banner').invoke('outerHeight').should('be.gt', 10)
+      // click on the hide button
+      cy.get('.banner-button').click()
+      // check it's shrunk
+      cy.get('.banner').invoke('outerHeight').should('be.equal', 10)
+    })
+  })
+})
diff --git a/src/components/Banner/__tests__/getBannerPalette.test.ts b/src/components/Banner/__tests__/getBannerPalette.test.ts
new file mode 100644
index 000000000..c2dafb130
--- /dev/null
+++ b/src/components/Banner/__tests__/getBannerPalette.test.ts
@@ -0,0 +1,29 @@
+import { describe, expect, test } from '@jest/globals'
+
+import { Level } from '../../../constants'
+import { THEME } from '../../../theme'
+import { getBannerPalette } from '../utils'
+
+describe('getBannerPalette', () => {
+  test('should return a red palette for the Error level', () => {
+    expect(getBannerPalette(Level.ERROR)).toStrictEqual({
+      backgroundColor: THEME.color.maximumRed15,
+      borderColor: THEME.color.maximumRed,
+      color: THEME.color.maximumRed
+    })
+  })
+  test('should return a yellow palette for the Warning level', () => {
+    expect(getBannerPalette(Level.WARNING)).toStrictEqual({
+      backgroundColor: THEME.color.goldenPoppy25,
+      borderColor: THEME.color.goldenPoppy,
+      color: THEME.color.charcoal
+    })
+  })
+  test('should return a green palette for the success level', () => {
+    expect(getBannerPalette(Level.SUCCESS)).toStrictEqual({
+      backgroundColor: THEME.color.mediumSeaGreen25,
+      borderColor: THEME.color.mediumSeaGreen,
+      color: THEME.color.mediumSeaGreen
+    })
+  })
+})
diff --git a/src/components/Banner/index.tsx b/src/components/Banner/index.tsx
new file mode 100644
index 000000000..9fb7bb586
--- /dev/null
+++ b/src/components/Banner/index.tsx
@@ -0,0 +1,122 @@
+import { IconButton } from '@elements/IconButton'
+import { LinkButton } from '@elements/LinkButton'
+import { isString } from 'lodash'
+import { type ReactNode, useState } from 'react'
+import styled from 'styled-components'
+
+import { getBannerPalette } from './utils'
+import { Accent, Icon, Level, Size } from '../../constants'
+
+export type BannerProps = {
+  children: string | ReactNode
+  isClosable: boolean
+  isCollapsible: boolean
+  isHiddenByDefault: boolean | undefined
+  level: Level
+  top: string
+}
+
+interface WrapperProps {
+  $isCollapsed: boolean
+  $isCollapsible: boolean
+  $isHidden: boolean
+  $level: Level
+  $top: string
+}
+const Wrapper = styled.div<WrapperProps>`
+  display: ${(p: WrapperProps) => (p.$isHidden ? 'none' : 'flex')};
+  flex-direction: row;
+  justify-content: space-between;
+  align-items: center;
+  position: absolute;
+  background-color: ${(p: WrapperProps) => getBannerPalette(p.$level).backgroundColor};
+  width: 100%;
+  min-width: 100%;
+  max-width: 100%;
+  padding: 0 2rem;
+  top: ${(p: WrapperProps) => `${p.$top}`};
+  z-index: 1000;
+  height: ${(p: WrapperProps) => (!p.$isHidden && p.$isCollapsed ? '10px' : '50px')};
+  border-bottom: ${({ $isCollapsible, $level }: WrapperProps) =>
+    $isCollapsible ? `4px solid ${getBannerPalette($level).borderColor}` : 'none'};
+  box-shadow: ${({ $isCollapsible }: WrapperProps) => ($isCollapsible ? 'none' : '0px 3px 4px #7077854D')};
+  transition: height 0.3s ease;
+`
+
+interface ContentWrapperProps {
+  $level: Level
+}
+const ContentWrapper = styled.div<ContentWrapperProps>`
+  color: ${(p: ContentWrapperProps) => getBannerPalette(p.$level).color};
+  align-self: center;
+  flex-grow: 2;
+  text-align: center;
+  font-size: 16px;
+  font-weight: 500;
+`
+
+const ButtonWrapper = styled.div`
+  align-self: center;
+`
+
+function Banner({ children, isClosable, isCollapsible, isHiddenByDefault, level, top }: Readonly<BannerProps>) {
+  const [isHidden, setIsHidden] = useState<boolean>(!!isHiddenByDefault)
+  const [isCollapsed, setIsCollapsed] = useState<boolean>(false)
+  const [isCollapsing, setIsCollapsing] = useState<boolean>(false)
+  const [hasCollapsed, setHasCollapsed] = useState<boolean>(false)
+
+  const enterHover = (): void => {
+    if (!isHidden && isCollapsed && !isCollapsing) {
+      setIsCollapsed(false)
+    }
+    setIsCollapsing(false)
+  }
+  const leaveHover = (): void => {
+    if (!isHidden && hasCollapsed) {
+      setIsCollapsed(true)
+    }
+  }
+
+  const onClickAction = (): void => {
+    if (isClosable) {
+      setIsHidden(true)
+    } else if (isCollapsible) {
+      setIsCollapsing(true)
+      setIsCollapsed(true)
+      setHasCollapsed(true)
+    }
+  }
+
+  return (
+    <Wrapper
+      $isCollapsed={isCollapsed}
+      $isCollapsible={isCollapsible}
+      $isHidden={isHidden}
+      $level={level}
+      $top={top}
+      className="banner"
+      onMouseEnter={enterHover}
+      onMouseLeave={leaveHover}
+    >
+      {!isHidden && !isCollapsed && (
+        <>
+          <ContentWrapper $level={level}>{isString(children) ? <p>{children}</p> : <>{children}</>}</ContentWrapper>
+          <ButtonWrapper
+            className="banner-button"
+            onClick={() => onClickAction()}
+            title={isClosable ? 'fermer' : 'masquer'}
+          >
+            {isClosable && (
+              <IconButton accent={Accent.TERTIARY} color={getBannerPalette(level).color} Icon={Icon.Close} />
+            )}
+            {!isClosable && isCollapsible && <LinkButton size={Size.LARGE}>Masquer</LinkButton>}
+          </ButtonWrapper>
+        </>
+      )}
+    </Wrapper>
+  )
+}
+
+Banner.displayName = 'Banner'
+
+export { Banner }
diff --git a/src/components/Banner/utils.ts b/src/components/Banner/utils.ts
new file mode 100644
index 000000000..e93214ad2
--- /dev/null
+++ b/src/components/Banner/utils.ts
@@ -0,0 +1,25 @@
+import { Level } from '../../constants'
+import { THEME } from '../../theme'
+
+export const getBannerPalette = (level: Level) => {
+  if (level === Level.ERROR) {
+    return {
+      backgroundColor: THEME.color.maximumRed15,
+      borderColor: THEME.color.maximumRed,
+      color: THEME.color.maximumRed
+    }
+  }
+  if (level === Level.WARNING) {
+    return {
+      backgroundColor: THEME.color.goldenPoppy25,
+      borderColor: THEME.color.goldenPoppy,
+      color: THEME.color.charcoal
+    }
+  }
+
+  return {
+    backgroundColor: THEME.color.mediumSeaGreen25,
+    borderColor: THEME.color.mediumSeaGreen,
+    color: THEME.color.mediumSeaGreen
+  }
+}
diff --git a/src/index.ts b/src/index.ts
index 0e01f3941..4f021cd1e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -25,6 +25,7 @@ export { SideMenu } from './components/SideMenu'
 export { SingleTag } from './elements/SingleTag'
 export { MapMenuDialog } from './components/MapMenuDialog'
 export { Message } from './components/Message'
+export { Banner } from './components/Banner'
 
 export { Button } from './elements/Button'
 export { Field } from './elements/Field'
@@ -198,6 +199,7 @@ export type { NotifierProps } from './components/Notifier'
 export type { SideMenuProps } from './components/SideMenu'
 export type { SingleTagProps } from './elements/SingleTag'
 export type { MessageProps } from './components/Message'
+export type { BannerProps } from './components/Banner'
 
 export type { ButtonProps } from './elements/Button'
 export type { FieldProps } from './elements/Field'
diff --git a/stories/components/Banner.stories.tsx b/stories/components/Banner.stories.tsx
new file mode 100644
index 000000000..13bfb2538
--- /dev/null
+++ b/stories/components/Banner.stories.tsx
@@ -0,0 +1,53 @@
+import { ARG_TYPE, META_DEFAULTS } from '../../.storybook/constants'
+import { generateStoryDecorator } from '../../.storybook/utils/generateStoryDecorator'
+import { Level, THEME } from '../../src'
+import { Banner } from '../../src/components/Banner'
+
+import type { BannerProps } from '../../src/components/Banner'
+import type { Meta } from '@storybook/react'
+
+/* eslint-disable sort-keys-fix/sort-keys-fix */
+const meta: Meta<BannerProps> = {
+  ...META_DEFAULTS,
+
+  title: 'Components/Banner',
+  component: Banner,
+
+  argTypes: {
+    isHiddenByDefault: ARG_TYPE.OPTIONAL_BOOLEAN,
+    level: ARG_TYPE.OPTIONAL_LEVEL,
+    isCollapsible: ARG_TYPE.BOOLEAN,
+    isClosable: ARG_TYPE.BOOLEAN
+  },
+
+  args: {
+    isHiddenByDefault: false,
+    isCollapsible: true,
+    isClosable: false,
+    level: Level.SUCCESS,
+    children: 'This is the content of the banner',
+    top: '76px'
+  },
+
+  decorators: [generateStoryDecorator()]
+}
+/* eslint-enable sort-keys-fix/sort-keys-fix */
+
+export default meta
+
+export function _Banner(props: BannerProps) {
+  return (
+    <div>
+      <div
+        style={{
+          backgroundColor: THEME.color.charcoal,
+          height: '60px',
+          width: '100%'
+        }}
+      >
+        <h2 style={{ color: THEME.color.white }}>This is a header</h2>
+      </div>
+      <Banner {...props} />
+    </div>
+  )
+}