feat: add group avatar

docusaurus/docs/React/components/contexts/channel-list-context.mdx

@@ -5,7 +5,7 @@ title: ChannelListContext
 
 The context value is provided by `ChannelListContextProvider` which wraps the contents rendered by [`ChannelList`](../core-components/channel-list.mdx). It exposes API that the default and custom components rendered by `ChannelList` can take advantage of. The components that can consume the context are customizable via `ChannelListProps`:
 
-- `Avatar` - component used to display channel image
+- `ChannelAvatar` - component used to display channel image
 - `ChannelSearch` - renders channel search input and results
 - `EmptyStateIndicator` - rendered when the channels query returns and empty array
 - `LoadingErrorIndicator` - rendered when the channels query fails
@@ -24,10 +24,10 @@ import { useChannelListContext } from 'stream-chat-react';
 export const CustomComponent = () => {
   const { channels, setChannels } = useChannelListContext();
   // component logic ...
-  return(
-      {/* rendered elements */}
-  );
-}
+  return {
+    /* rendered elements */
+  };
+};
 ```
 
 ## Value
@@ -37,7 +37,7 @@ export const CustomComponent = () => {
 State representing the array of loaded channels. Channels query is executed by default only within the [`ChannelList` component](../core-components/channel-list.mdx) in the SDK.
 
 | Type        |
-|-------------|
+| ----------- |
 | `Channel[]` |
 
 ### setChannels
@@ -109,5 +109,5 @@ const Sidebar = () => {
 ```
 
 | Type                                  |
-|---------------------------------------|
+| ------------------------------------- |
 | `Dispatch<SetStateAction<Channel[]>>` |

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

@@ -131,6 +131,14 @@ The [default `BaseImage` component](../../utility-components/base-image) tries t
 | --------- | ----------------------------------------------------------------- |
 | component | <GHComponentLink text='BaseImage' path='/Gallery/BaseImage.tsx'/> |
 
+### ChannelAvatar
+
+Custom UI component to display avatar for a channel in ChannelHeader.
+
+| Type      | Default                                                                  |
+| --------- | ------------------------------------------------------------------------ |
+| component | <GHComponentLink text='ChannelAvatar' path='/Avatar/ChannelAvatar.tsx'/> |
+
 ### CooldownTimer
 
 Custom UI component to display the slow mode cooldown timer.

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

@@ -187,11 +187,11 @@ list from incrementing the list.
 
 ### Avatar
 
-Custom UI component to display the user's avatar.
+Custom UI component to display the channel avatar. The default avatar component for `ChannelList` is `ChannelAvatar`.
 
-| Type      | Default                                                    |
-| --------- | ---------------------------------------------------------- |
-| component | <GHComponentLink text='Avatar' path='/Avatar/Avatar.tsx'/> |
+| Type      | Default                                                           |
+| --------- | ----------------------------------------------------------------- |
+| component | <GHComponentLink text='Avatar' path='/Avatar/ChannelAvatar.tsx'/> |
 
 ### channelRenderFilterFn
 

docusaurus/docs/React/components/core-components/channel.mdx

@@ -190,6 +190,14 @@ Custom UI component to display a user's avatar.
 | --------- | ---------------------------------------------------------- |
 | component | <GHComponentLink text='Avatar' path='/Avatar/Avatar.tsx'/> |
 
+### ChannelAvatar
+
+Custom UI component to display avatar for a channel in ChannelHeader.
+
+| Type      | Default                                                                  |
+| --------- | ------------------------------------------------------------------------ |
+| component | <GHComponentLink text='ChannelAvatar' path='/Avatar/ChannelAvatar.tsx'/> |
+
 ### channelQueryOptions
 
 Optional configuration parameters used for the initial channel query. Applied only if the value of `channel.initialized` is false. If the channel instance has already been initialized (channel has been queried), then the channel query will be skipped and channelQueryOptions will not be applied.

docusaurus/docs/React/components/utility-components/avatar.mdx

@@ -3,44 +3,72 @@ id: avatar
 title: Avatar
 ---
 
-The `Avatar` component displays an image, with fallback to the first letter of the optional name prop.
+The SDK supports variety of avatar component types. Different approach is taken to display a channel avatar and an avatar of a message author.
 
-## Basic Usage
+The channel avatar accounts for the fact that the channel may contain more than two members and thus become a group channel. Therefore, it renders a `GroupAvatar` component in case of more than two channel members and `Avatar` in case of two or less channel members.
+On the other hand, messages use the avatars for a specific single user and thus using the `Avatar` component exclusively.
 
-A typical use case for the `Avatar` component would be to import and use in your custom components that will completely override a header component, preview component, or similar.
+The `Avatar` component displays an image, with fallback to the first letter of the optional name prop. The `GroupAvatar` displays up to four `Avatar` components in a 2x2 grid.
+
+## Customizing Avatar component
+
+The SDK's default `Avatar` component is used by the following components:
+
+- `ChannelSearch` results for users
+- `Message`
+- `QuotesMessage`
+- `MesageStatus`
+- `QuotedMessagePreview` in message composer
+- Suggestion items for user mentions
+- `Poll`
+- Message `Reactions`
+- `ThreadList`
+
+Passing your custom avatar component to `Channel` prop `Avatar` overrides the avatar for all the above components.
 
 Here's an example of using the `Avatar` component within a custom preview component:
 
 ```tsx
-import { Avatar } from 'stream-chat-react';
-
-const YourCustomChannelPreview = (props) => {
-  return (
-    <div>
-      <Avatar name={props.displayTitle} image={props.displayImage} />
-      <div> Other channel info needed in the preview </div>
-    </div>
-  );
+import { Channel } from 'stream-chat-react';
+import type { AvatarProps } from 'stream-chat-react';
+
+const Avatar = (props: AvatarProps) => {
+  return <div>Custom avatar UI</div>;
 };
 
-<ChannelList Preview={YourCustomChannelPreview} />;
+<Channel Avatar={Avatar} />;
 ```
 
-## UI Customization
+## Customizing Channel Avatar
 
 You can also take advantage of the `Avatar` prop on the `ChannelHeader` and `ChannelList` components to override just that aspect of these components specifically, see the example below.
 
-An example of overriding just the `Avatar` component in the default `ChannelPreviewMessenger` component.
+An example of overriding just the `Avatar` component in the default `ChannelPreview` component.
+
+```tsx
+import type { ChannelAvatarProps } from 'stream-chat-react';
+
+const CustomChannelAvatar = (props: ChannelAvatarProps) => {
+  return <div>Custom Channel Avatar</div>;
+};
+
+<ChannelList Avatar={CustomChannelAvatar} />;
+```
+
+To override channel avatar in `ChannelHeader` we need to provide our component to `Channel` prop `ChannelAvatar`:
 
 ```tsx
-const CustomAvatar = (props) => {
-  return <Avatar image={props.image} />;
+import { Channel } from 'stream-chat-react';
+import type { ChannelAvatarProps } from 'stream-chat-react';
+
+const CustomChannelAvatar = (props: ChannelAvatarProps) => {
+  return <div>Custom Channel Avatar</div>;
 };
 
-<ChannelList Preview={(props) => <ChannelPreviewMessenger {...props} Avatar={CustomAvatar} />} />;
+<Channel ChannelAvatar={CustomChannelAvatar} />;
 ```
 
-## Props
+## Avatar Props
 
 ### className
 
@@ -89,3 +117,15 @@ The entire user object for the chat user represented by the Avatar component. Th
 | Type   |
 | ------ |
 | Object |
+
+## ChannelAvatar Props
+
+Besides the `Avatar` props listed above, the `ChannelAvatar` component accepts the following props.
+
+### groupChannelDisplayInfo
+
+Mapping of image URLs to names which initials will be used as fallbacks in case image assets fail to load.
+
+| Type                                  |
+| ------------------------------------- |
+| `{ image?: string; name?: string }[]` |

src/components/Avatar/Avatar.tsx

@@ -11,15 +11,15 @@ import type { DefaultStreamChatGenerics } from '../../types/types';
 export type AvatarProps<
   StreamChatGenerics extends DefaultStreamChatGenerics = DefaultStreamChatGenerics
 > = {
-  /** Custom class that will be merged with the default class */
+  /** Custom root element class that will be merged with the default class */
   className?: string;
   /** Image URL or default is an image of the first initial of the name if there is one  */
   image?: string | null;
   /** Name of the image, used for title tag fallback */
   name?: string;
-  /** click event handler */
+  /** click event handler attached to the component root element */
   onClick?: (event: React.BaseSyntheticEvent) => void;
-  /** mouseOver event handler */
+  /** mouseOver event handler attached to the component root element */
   onMouseOver?: (event: React.BaseSyntheticEvent) => void;
   /** The entire user object for the chat user displayed in the component */
   user?: UserResponse<StreamChatGenerics>;

src/components/Avatar/ChannelAvatar.tsx

@@ -0,0 +1,22 @@
+import React from 'react';
+import { Avatar, AvatarProps, GroupAvatar, GroupAvatarProps } from './index';
+import type { DefaultStreamChatGenerics } from '../../types';
+
+export type ChannelAvatarProps<
+  StreamChatGenerics extends DefaultStreamChatGenerics = DefaultStreamChatGenerics
+> = Partial<GroupAvatarProps> & AvatarProps<StreamChatGenerics>;
+
+export const ChannelAvatar = <
+  StreamChatGenerics extends DefaultStreamChatGenerics = DefaultStreamChatGenerics
+>({
+  groupChannelDisplayInfo,
+  image,
+  name,
+  user,
+  ...sharedProps
+}: ChannelAvatarProps<StreamChatGenerics>) => {
+  if (groupChannelDisplayInfo) {
+    return <GroupAvatar groupChannelDisplayInfo={groupChannelDisplayInfo} {...sharedProps} />;
+  }
+  return <Avatar image={image} name={name} user={user} {...sharedProps} />;
+};

src/components/Avatar/GroupAvatar.tsx

@@ -0,0 +1,39 @@
+import clsx from 'clsx';
+import React from 'react';
+import { Avatar, AvatarProps } from './Avatar';
+import { GroupChannelDisplayInfo } from '../ChannelPreview';
+
+export type GroupAvatarProps = Pick<AvatarProps, 'className' | 'onClick' | 'onMouseOver'> & {
+  /** Mapping of image URLs to names which initials will be used as fallbacks in case image assets fail to load. */
+  groupChannelDisplayInfo: GroupChannelDisplayInfo;
+};
+
+export const GroupAvatar = ({
+  className,
+  groupChannelDisplayInfo,
+  onClick,
+  onMouseOver,
+}: GroupAvatarProps) => (
+  <div
+    className={clsx(
+      `str-chat__avatar-group`,
+      { 'str-chat__avatar-group--three-part': groupChannelDisplayInfo.length === 3 },
+      className,
+    )}
+    data-testid='group-avatar'
+    onClick={onClick}
+    onMouseOver={onMouseOver}
+    role='button'
+  >
+    {groupChannelDisplayInfo.slice(0, 4).map(({ image, name }, i) => (
+      <Avatar
+        className={clsx({
+          'str-chat__avatar--single': groupChannelDisplayInfo.length === 3 && i === 0,
+        })}
+        image={image}
+        key={`${name}-${image}-${i}`}
+        name={name}
+      />
+    ))}
+  </div>
+);

src/components/Avatar/index.ts

@@ -1 +1,3 @@
 export * from './Avatar';
+export * from './ChannelAvatar';
+export * from './GroupAvatar';

src/components/Channel/Channel.tsx

@@ -112,6 +112,7 @@ type ChannelPropsForwardedToComponentContext<
   | 'AutocompleteSuggestionList'
   | 'Avatar'
   | 'BaseImage'
+  | 'ChannelAvatar'
   | 'CooldownTimer'
   | 'CustomMessageActionsList'
   | 'DateSeparator'
@@ -1234,6 +1235,7 @@ const ChannelInner = <
       AutocompleteSuggestionList: props.AutocompleteSuggestionList,
       Avatar: props.Avatar,
       BaseImage: props.BaseImage,
+      ChannelAvatar: props.ChannelAvatar,
       CooldownTimer: props.CooldownTimer,
       CustomMessageActionsList: props.CustomMessageActionsList,
       DateSeparator: props.DateSeparator,
@@ -1293,6 +1295,7 @@ const ChannelInner = <
       props.AutocompleteSuggestionList,
       props.Avatar,
       props.BaseImage,
+      props.ChannelAvatar,
       props.CooldownTimer,
       props.CustomMessageActionsList,
       props.DateSeparator,

src/components/ChannelHeader/ChannelHeader.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 
 import { MenuIcon as DefaultMenuIcon } from './icons';
 
-import { AvatarProps, Avatar as DefaultAvatar } from '../Avatar';
+import { ChannelAvatar, ChannelAvatarProps } from '../Avatar';
 import { useChannelPreviewInfo } from '../ChannelPreview/hooks/useChannelPreviewInfo';
 
 import { useChannelStateContext } from '../../context/ChannelStateContext';
@@ -13,7 +13,7 @@ import type { DefaultStreamChatGenerics } from '../../types/types';
 
 export type ChannelHeaderProps = {
   /** UI component to display a user's avatar, defaults to and accepts same props as: [Avatar](https://github.com/GetStream/stream-chat-react/blob/master/src/components/Avatar/Avatar.tsx) */
-  Avatar?: React.ComponentType<AvatarProps>;
+  Avatar?: React.ComponentType<ChannelAvatarProps>;
   /** Manually set the image to render, defaults to the Channel image */
   image?: string;
   /** Show a little indicator that the Channel is live right now */
@@ -33,7 +33,7 @@ export const ChannelHeader = <
   props: ChannelHeaderProps,
 ) => {
   const {
-    Avatar = DefaultAvatar,
+    Avatar = ChannelAvatar,
     MenuIcon = DefaultMenuIcon,
     image: overrideImage,
     live,
@@ -43,7 +43,7 @@ export const ChannelHeader = <
   const { channel, watcher_count } = useChannelStateContext<StreamChatGenerics>('ChannelHeader');
   const { openMobileNav } = useChatContext<StreamChatGenerics>('ChannelHeader');
   const { t } = useTranslationContext('ChannelHeader');
-  const { displayImage, displayTitle } = useChannelPreviewInfo({
+  const { displayImage, displayTitle, groupChannelDisplayInfo } = useChannelPreviewInfo({
     channel,
     overrideImage,
     overrideTitle,
@@ -62,6 +62,7 @@ export const ChannelHeader = <
       </button>
       <Avatar
         className='str-chat__avatar--channel-header'
+        groupChannelDisplayInfo={groupChannelDisplayInfo}
         image={displayImage}
         name={displayTitle}
       />