feat(renderText): allow custom remark and rehype plugin composition (#2142)

Add optional parameters to `renderText()` to enable configuration of
rehype and remark plugins used to transform message.text into React
elements.

Author: MartinCupela

docusaurus/docs/React/components/contexts/message-context.mdx

@@ -341,7 +341,7 @@ Custom function to render message text content.
 
 | Type     | Default                                                                                |
 | -------- | -------------------------------------------------------------------------------------- |
-| function | [renderText](https://github.com/GetStream/stream-chat-react/blob/master/src/utils.tsx) |
+| function | <GHComponentLink text='renderText' path='/Message/renderText/renderText.tsx'/> |
 
 ### setEditingState
 

docusaurus/docs/React/components/core-components/message-list.mdx

@@ -66,10 +66,20 @@ The `MessageList` internally creates a mapping of message id to a style group. T
 
 ### Default behaviour
 
-The output of the default [`renderText`](#render-text) function is a message text processed by the `ReactMarkdown` component with [`remark`](https://github.com/remarkjs/remark/blob/main/doc/plugins.md) [`remark-gfm`](https://github.com/remarkjs/remark-gfm) plugin and custom [`rehype`](https://github.com/rehypejs/rehype/blob/main/doc/plugins.md) plugins for mentions and emojis.
+The default [`renderText`](#render-text) function parses a markdown string and outputs a `ReactElement`. Under the hood, the output is generated by the `ReactMarkdown` component from [react-markdown library](https://github.com/remarkjs/react-markdown). The component transforms the markdown to `ReactElement` by using [`remark` parser](https://github.com/remarkjs/remark/tree/main) and [`remark`](https://github.com/remarkjs/remark/blob/main/doc/plugins.md) and [`rehype`](https://github.com/rehypejs/rehype/blob/main/doc/plugins.md) plugins.
+
+The default `remark` plugins used by SDK are:
+
+1. [`remark-gfm`](https://github.com/remarkjs/remark-gfm) - a third party plugin to add GitHub-like markdown support
+
+The default `rehype` plugins (both specific to this SDK) are:
+1. plugin to render user mentions
+2. plugin to render emojis
 
 ### Overriding defaults
 
+#### Custom `renderText` function
+
 If you don't want your chat implementation to support markdown syntax by default you can override the default behaviour by creating a custom `renderText` function which returns a React node and passing it down to the `MessageList` or `MessageSimple` component via `renderText` property.
 
 For this particular example we'll create a very primitive one which takes the message text passed down to it as a first argument and returns it wrapped in `span` element:
@@ -112,10 +122,12 @@ const App = () => (
 );
 ```
 
-If you feel like the default output is sufficient but you'd like to adjust how certain [ReactMarkdown components](https://github.com/remarkjs/react-markdown#appendix-b-components) look like (like `strong` element generated by typing \*\*strong\*\*) you can do so by passing down options to a third argument of the default `renderText` function:
+#### Custom element rendering
+
+If you feel like the default output is sufficient, but you'd like to adjust how certain [ReactMarkdown components](https://github.com/remarkjs/react-markdown#appendix-b-components) look like (like `strong` element generated by typing \*\*strong\*\*) you can do so by passing down options to a third argument of the default `renderText` function:
 
 :::note
-Types `mention` and `emoji` are special case component types generated by our custom rehype plugins. Currently we do not allow to add custom rehype/remark plugins to our default `renderText` function due to compatibility reasons regarding our custom plugins.
+Types `mention` and `emoji` are special case component types generated by our SDK's custom rehype plugins.
 :::
 
 ```tsx
@@ -146,6 +158,38 @@ const App = () => (
 );
 ```
 
+#### Custom remark and rehype plugins
+
+If you would like to extend the array of plugins used to parse the markdown, you can provide your own lists of remark resp. rehype plugins. The logic that determines what plugins are used and in which order can be specified in custom `getRehypePlugins` and `getRemarkPlugins` functions. These receive the default array of rehype and remark plugins for further customization. Both custom functions ought to be passed to the third `renderText()` parameter. An example follows:
+
+:::note
+It is important to understand what constitutes a rehype or remark plugin. A good start is to learn about the library called [`react-remark`](https://github.com/remarkjs/react-remark) which is used under the hood in our `renderText()` function.
+:::
+
+
+```tsx
+import { renderText, RenderTextPluginConfigurator } from 'stream-chat-react';
+import {customRehypePlugin} from './rehypePlugins';
+import {customRemarkPlugin} from './remarkPlugins';
+
+const getRehypePlugins: RenderTextPluginConfigurator = (plugins) => {
+    return [customRehypePlugin, ...plugins];
+}
+const getRemarkPlugins: RenderTextPluginConfigurator = (plugins) => {
+    return [customRemarkPlugin, ...plugins];
+}
+
+const customRenderText = (text, mentionedUsers) =>
+  renderText(text, mentionedUsers, {
+    getRehypePlugins,
+    getRemarkPlugins
+  });
+
+const CustomMessageList = () => (
+  <MessageList renderText={customRenderText}/>
+);
+```
+
 ## Props
 
 ### additionalMessageInputProps
@@ -434,7 +478,7 @@ Custom function to render message text content.
 
 | Type     | Default                                                                                |
 | -------- | -------------------------------------------------------------------------------------- |
-| function | [renderText](https://github.com/GetStream/stream-chat-react/blob/master/src/utils.tsx) |
+| function | <GHComponentLink text='renderText' path='/Message/renderText/renderText.tsx'/> |
 
 ### retrySendMessage
 

docusaurus/docs/React/components/message-components/message-ui.mdx

@@ -460,7 +460,7 @@ Custom function to render message text content (overrides the function stored in
 
 | Type     | Default                                                                                |
 | -------- | -------------------------------------------------------------------------------------- |
-| function | [renderText](https://github.com/GetStream/stream-chat-react/blob/master/src/utils.tsx) |
+| function | <GHComponentLink text='renderText' path='/Message/renderText/renderText.tsx'/> |
 
 ### setEditingState
 

docusaurus/docs/React/components/message-components/message.mdx

@@ -326,7 +326,7 @@ Custom function to render message text content.
 
 | Type     | Default                                                                                |
 | -------- | -------------------------------------------------------------------------------------- |
-| function | [renderText](https://github.com/GetStream/stream-chat-react/blob/master/src/utils.tsx) |
+| function | <GHComponentLink text='renderText' path='/Message/renderText/renderText.tsx'/> |
 
 ### retrySendMessage
 

src/__tests__/utils.test.js

@@ -3,10 +3,10 @@ import clsx from 'clsx';
 
 import { useComponentContext } from '../../context/ComponentContext';
 import { useChatContext } from '../../context/ChatContext';
-import { escapeRegExp } from '../../utils';
 
 import { Item } from './Item';
 import { DefaultSuggestionListHeader } from './Header';
+import { escapeRegExp } from '../Message/renderText';
 
 export const List = ({
   className,

src/components/AutoCompleteTextarea/List.jsx

@@ -1,6 +1,5 @@
 import React, { useEffect, useState } from 'react';
-
-import { getWholeChar } from '../../utils';
+import { getWholeChar } from '../../utils/getWholeChar';
 
 import type { UserResponse } from 'stream-chat';
 

src/components/Avatar/Avatar.tsx

@@ -14,7 +14,7 @@ import { useChatContext } from '../../context/ChatContext';
 import { useComponentContext } from '../../context/ComponentContext';
 import { useMessageContext } from '../../context/MessageContext';
 import { useTranslationContext } from '../../context/TranslationContext';
-import { renderText } from '../../utils';
+import { renderText } from './renderText';
 
 import type { TranslationLanguages } from 'stream-chat';
 

src/components/Message/FixedHeightMessage.tsx

@@ -1,10 +1,10 @@
 import React, { useMemo } from 'react';
 
 import { QuotedMessage as DefaultQuotedMessage } from './QuotedMessage';
-import { messageHasAttachments } from './utils';
+import { isOnlyEmojis, messageHasAttachments } from './utils';
 
 import { useComponentContext, useMessageContext, useTranslationContext } from '../../context';
-import { renderText as defaultRenderText, isOnlyEmojis } from '../../utils';
+import { renderText as defaultRenderText } from './renderText';
 
 import type { TranslationLanguages } from 'stream-chat';
 import type { MessageContextValue, StreamMessage } from '../../context';

src/components/Message/MessageText.tsx

@@ -10,5 +10,6 @@ export * from './MessageStatus';
 export * from './MessageText';
 export * from './MessageTimestamp';
 export * from './QuotedMessage';
+export * from './renderText';
 export * from './types';
 export * from './utils';