From c105507f2f097c17fb3b53df8b1a093b0a249d00 Mon Sep 17 00:00:00 2001
From: Julie <43496356+julieg18@users.noreply.github.com>
Date: Tue, 12 Oct 2021 07:18:20 -0500
Subject: [PATCH] Add markdown tabs (#2914)

---
 .../Markdown/ToggleProvider/index.tsx         | 48 ++++++++++
 .../Documentation/Markdown/index.tsx          | 94 ++++++++++++++++++-
 .../Documentation/Markdown/styles.module.css  | 50 ++++++++++
 3 files changed, 189 insertions(+), 3 deletions(-)
 create mode 100644 src/components/Documentation/Markdown/ToggleProvider/index.tsx

diff --git a/src/components/Documentation/Markdown/ToggleProvider/index.tsx b/src/components/Documentation/Markdown/ToggleProvider/index.tsx
new file mode 100644
index 0000000000..7d4df78c6c
--- /dev/null
+++ b/src/components/Documentation/Markdown/ToggleProvider/index.tsx
@@ -0,0 +1,48 @@
+import React, { createContext, useState } from 'react'
+
+interface ITogglesData {
+  [key: string]: { texts: string[]; checkedInd: number }
+}
+
+interface ITogglesContext {
+  addNewToggle?: (id: string, texts: string[]) => void
+  updateToggleInd?: (id: string, newInd: number) => void
+  togglesData?: ITogglesData
+}
+
+export const TogglesContext = createContext<ITogglesContext>({})
+
+export const TogglesProvider: React.FC = ({ children }) => {
+  const [togglesData, setTogglesData] = useState({})
+
+  const addNewToggle = (id: string, texts: string[]): void => {
+    const togglesDataCopy: ITogglesData = { ...togglesData }
+    togglesDataCopy[id] = { texts, checkedInd: 0 }
+    setTogglesData(togglesDataCopy)
+  }
+
+  const updateToggleInd = (id: string, newInd: number): void => {
+    const togglesDataCopy: ITogglesData = { ...togglesData }
+    const selectedTabText = togglesDataCopy[id].texts[newInd]
+    togglesDataCopy[id] = { ...togglesDataCopy[id], checkedInd: newInd }
+
+    for (const [toggleId, { texts }] of Object.entries(togglesDataCopy)) {
+      if (texts.includes(selectedTabText)) {
+        togglesDataCopy[toggleId] = {
+          ...togglesDataCopy[toggleId],
+          checkedInd: togglesDataCopy[id].texts.indexOf(selectedTabText)
+        }
+      }
+    }
+
+    setTogglesData(togglesDataCopy)
+  }
+
+  return (
+    <TogglesContext.Provider
+      value={{ addNewToggle, updateToggleInd, togglesData }}
+    >
+      {children}
+    </TogglesContext.Provider>
+  )
+}
diff --git a/src/components/Documentation/Markdown/index.tsx b/src/components/Documentation/Markdown/index.tsx
index fc76f76243..f7881d23a5 100644
--- a/src/components/Documentation/Markdown/index.tsx
+++ b/src/components/Documentation/Markdown/index.tsx
@@ -1,4 +1,11 @@
-import React, { ReactNode, ReactElement } from 'react'
+import React, {
+  useEffect,
+  useState,
+  ReactNode,
+  ReactElement,
+  useContext
+} from 'react'
+import { nanoid } from 'nanoid'
 import rehypeReact from 'rehype-react'
 import Collapsible from 'react-collapsible'
 
@@ -7,6 +14,7 @@ import Link from '../../Link'
 import Tooltip from './Tooltip'
 
 import styles from './styles.module.css'
+import { TogglesContext, TogglesProvider } from './ToggleProvider'
 
 const Details: React.FC<{
   children: Array<{ props: { children: ReactNode } } | string>
@@ -95,6 +103,84 @@ const Card: React.FC<{
   )
 }
 
+const ToggleTab: React.FC<{
+  id: string
+  title: string
+  ind: number
+  onChange: () => void
+  checked: boolean
+}> = ({ children, id, checked, ind, onChange, title }) => {
+  const inputId = `tab-${id}-${ind}`
+
+  return (
+    <>
+      <input
+        id={inputId}
+        type="radio"
+        name={`toggle-${id}`}
+        onChange={onChange}
+        checked={checked}
+      />
+      <label className={styles.tabHeading} htmlFor={inputId}>
+        {title}
+      </label>
+      {children}
+    </>
+  )
+}
+
+const Toggle: React.FC<{
+  children: Array<{ props: { title: string } } | string>
+}> = ({ children }) => {
+  const [toggleId, setToggleId] = useState('')
+  const {
+    addNewToggle = (): null => null,
+    updateToggleInd = (): null => null,
+    togglesData = {}
+  } = useContext(TogglesContext)
+  const tabs: Array<{ props: { title: string } } | string> = children.filter(
+    child => child !== '\n'
+  )
+  const tabsTitles = tabs.map(tab =>
+    typeof tab === 'object' ? tab.props.title : ''
+  )
+
+  useEffect(() => {
+    if (toggleId === '') {
+      const newId = nanoid()
+      addNewToggle(newId, tabsTitles)
+      setToggleId(newId)
+    }
+
+    if (toggleId && !togglesData[toggleId]) {
+      addNewToggle(toggleId, tabsTitles)
+    }
+  }, [togglesData])
+
+  return (
+    <div className={styles.toggle}>
+      {tabs.map((tab, i) => (
+        <ToggleTab
+          ind={i}
+          key={i}
+          title={tabsTitles[i]}
+          id={toggleId}
+          checked={
+            i === (togglesData[toggleId] ? togglesData[toggleId].checkedInd : 0)
+          }
+          onChange={(): void => updateToggleInd(toggleId, i)}
+        >
+          {tab}
+        </ToggleTab>
+      ))}
+    </div>
+  )
+}
+
+const Tab: React.FC = ({ children }) => (
+  <div className={styles.tab}>{children}</div>
+)
+
 const renderAst = new rehypeReact({
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   createElement: React.createElement as any,
@@ -104,7 +190,9 @@ const renderAst = new rehypeReact({
     abbr: Abbr,
     a: Link,
     card: Card,
-    cards: Cards
+    cards: Cards,
+    toggle: Toggle,
+    tab: Tab
   }
 }).Compiler
 
@@ -125,7 +213,7 @@ const Markdown: React.FC<IMarkdownProps> = ({
 }) => {
   return (
     <Main prev={prev} next={next} tutorials={tutorials} githubLink={githubLink}>
-      {renderAst(htmlAst)}
+      <TogglesProvider>{renderAst(htmlAst)}</TogglesProvider>
     </Main>
   )
 }
diff --git a/src/components/Documentation/Markdown/styles.module.css b/src/components/Documentation/Markdown/styles.module.css
index 08f999dfb3..7c8f0f591c 100644
--- a/src/components/Documentation/Markdown/styles.module.css
+++ b/src/components/Documentation/Markdown/styles.module.css
@@ -118,3 +118,53 @@ a.card {
     background-color: var(--color-light-blue);
   }
 }
+
+.toggle {
+  display: flex;
+  flex-wrap: wrap;
+
+  input {
+    height: 0;
+    opacity: 0;
+    position: absolute;
+    width: 0;
+    overflow: hidden;
+  }
+
+  input:checked + label {
+    color: var(--color-azure);
+    border-color: var(--color-azure);
+  }
+
+  input:checked + label + .tab {
+    height: initial;
+    opacity: initial;
+    position: static;
+    width: 100%;
+    overflow: visible;
+  }
+
+  .tabHeading {
+    padding: 12px 16px 10px;
+    background-color: transparent;
+    border: none;
+    border-bottom: 2px solid transparent;
+    font-weight: bold;
+    font-size: 16px;
+    font-family: var(--font-brandon);
+    order: -1;
+
+    &:hover {
+      cursor: pointer;
+    }
+  }
+}
+
+.tab {
+  margin: 10px 0 0;
+  height: 0;
+  opacity: 0;
+  position: absolute;
+  overflow: hidden;
+  width: 0;
+}