Add limited attribute to accounts in REST API and a warning in web UI (#18344)

app/javascript/mastodon/components/avatar.js

@@ -2,11 +2,12 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import { autoPlayGif } from '../initial_state';
+import classNames from 'classnames';
 
 export default class Avatar extends React.PureComponent {
 
   static propTypes = {
-    account: ImmutablePropTypes.map.isRequired,
+    account: ImmutablePropTypes.map,
     size: PropTypes.number.isRequired,
     style: PropTypes.object,
     inline: PropTypes.bool,
@@ -37,15 +38,6 @@ export default class Avatar extends React.PureComponent {
     const { account, size, animate, inline } = this.props;
     const { hovering } = this.state;
 
-    const src = account.get('avatar');
-    const staticSrc = account.get('avatar_static');
-
-    let className = 'account__avatar';
-
-    if (inline) {
-      className = className + ' account__avatar-inline';
-    }
-
     const style = {
       ...this.props.style,
       width: `${size}px`,
@@ -53,15 +45,21 @@ export default class Avatar extends React.PureComponent {
       backgroundSize: `${size}px ${size}px`,
     };
 
-    if (hovering || animate) {
-      style.backgroundImage = `url(${src})`;
-    } else {
-      style.backgroundImage = `url(${staticSrc})`;
+    if (account) {
+      const src = account.get('avatar');
+      const staticSrc = account.get('avatar_static');
+
+      if (hovering || animate) {
+        style.backgroundImage = `url(${src})`;
+      } else {
+        style.backgroundImage = `url(${staticSrc})`;
+      }
     }
 
+
     return (
       <div
-        className={className}
+        className={classNames('account__avatar', { 'account__avatar-inline': inline })}
         onMouseEnter={this.handleMouseEnter}
         onMouseLeave={this.handleMouseLeave}
         style={style}