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+/*
+
+`<StatusHeader>`
+================
+
+Originally a part of `<Status>`, but extracted into a separate
+component for better documentation and maintainance by
+@kibi@glitch.social as a part of glitch-soc/mastodon.
+
+*/
+
+                            /* * * * */
+
+/*
+
+Imports:
+--------
+
+*/
+
+//  Package imports  //
+import React from 'react';
+import PropTypes from 'prop-types';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import { defineMessages, injectIntl } from 'react-intl';
+
+//  Mastodon imports  //
+import Avatar from '../../../mastodon/components/avatar';
+import AvatarOverlay from '../../../mastodon/components/avatar_overlay';
+import DisplayName from '../../../mastodon/components/display_name';
+import IconButton from '../../../mastodon/components/icon_button';
+import VisibilityIcon from './visibility_icon';
+
+                            /* * * * */
+
+/*
+
+Inital setup:
+-------------
+
+The `messages` constant is used to define any messages that we need
+from inside props. In our case, these are the `collapse` and
+`uncollapse` messages used with our collapse/uncollapse buttons.
+
+*/
+
+const messages = defineMessages({
+  collapse: { id: 'status.collapse', defaultMessage: 'Collapse' },
+  uncollapse: { id: 'status.uncollapse', defaultMessage: 'Uncollapse' },
+  public: { id: 'privacy.public.short', defaultMessage: 'Public' },
+  unlisted: { id: 'privacy.unlisted.short', defaultMessage: 'Unlisted' },
+  private: { id: 'privacy.private.short', defaultMessage: 'Followers-only' },
+  direct: { id: 'privacy.direct.short', defaultMessage: 'Direct' },
+});
+
+                            /* * * * */
+
+/*
+
+The `<StatusHeader>` component:
+-------------------------------
+
+The `<StatusHeader>` component wraps together the header information
+(avatar, display name) and upper buttons and icons (collapsing, media
+icons) into a single `<header>` element.
+
+###  Props
+
+ -  __`account`, `friend` (`ImmutablePropTypes.map`) :__
+    These give the accounts associated with the status. `account` is
+    the author of the post; `friend` will have their avatar appear
+    in the overlay if provided.
+
+ -  __`mediaIcon` (`PropTypes.string`) :__
+    If a mediaIcon should be placed in the header, this string
+    specifies it.
+
+ -  __`collapsible`, `collapsed` (`PropTypes.bool`) :__
+    These props tell whether a post can be, and is, collapsed.
+
+ -  __`parseClick` (`PropTypes.func`) :__
+    This function will be called when the user clicks inside the header
+    information.
+
+ -  __`setExpansion` (`PropTypes.func`) :__
+    This function is used to set the expansion state of the post.
+
+ -  __`intl` (`PropTypes.object`) :__
+    This is our internationalization object, provided by
+    `injectIntl()`.
+
+*/
+
+@injectIntl
+export default class StatusHeader extends React.PureComponent {
+
+  static propTypes = {
+    status: ImmutablePropTypes.map.isRequired,
+    friend: ImmutablePropTypes.map,
+    mediaIcon: PropTypes.string,
+    collapsible: PropTypes.bool,
+    collapsed: PropTypes.bool,
+    parseClick: PropTypes.func.isRequired,
+    setExpansion: PropTypes.func.isRequired,
+    intl: PropTypes.object.isRequired,
+  };
+
+/*
+
+###  Implementation
+
+####  `handleCollapsedClick()`.
+
+`handleCollapsedClick()` is just a simple callback for our collapsing
+button. It calls `setExpansion` to set the collapsed state of the
+status.
+
+*/
+
+  handleCollapsedClick = (e) => {
+    const { collapsed, setExpansion } = this.props;
+    if (e.button === 0) {
+      setExpansion(collapsed ? null : false);
+      e.preventDefault();
+    }
+  }
+
+/*
+
+####  `handleAccountClick()`.
+
+`handleAccountClick()` handles any clicks on the header info. It calls
+`parseClick()` with our `account` as the anticipatory `destination`.
+
+*/
+
+  handleAccountClick = (e) => {
+    const { status, parseClick } = this.props;
+    parseClick(e, `/accounts/${+status.getIn(['account', 'id'])}`);
+  }
+
+/*
+
+####  `render()`.
+
+`render()` actually puts our element on the screen. `<StatusHeader>`
+has a very straightforward rendering process.
+
+*/
+
+  render () {
+    const {
+      status,
+      friend,
+      mediaIcon,
+      collapsible,
+      collapsed,
+      intl,
+    } = this.props;
+
+    const account = status.get('account');
+
+    return (
+      <header className='status__info'>
+        {
+
+/*
+
+We have to include the status icons before the header content because
+it is rendered as a float.
+
+*/
+
+        }
+        <div className='status__info__icons'>
+          {mediaIcon ? (
+            <i
+              className={`fa fa-fw fa-${mediaIcon}`}
+              aria-hidden='true'
+            />
+          ) : null}
+          {(
+            <VisibilityIcon visibility={status.get('visibility')} />
+          )}
+          {collapsible ? (
+            <IconButton
+              className='status__collapse-button'
+              animate flip
+              active={collapsed}
+              title={
+                collapsed ?
+                intl.formatMessage(messages.uncollapse) :
+                intl.formatMessage(messages.collapse)
+              }
+              icon='angle-double-up'
+              onClick={this.handleCollapsedClick}
+            />
+          ) : null}
+        </div>
+        {
+
+/*
+
+This begins our header content. It is all wrapped inside of a link
+which gets handled by `handleAccountClick`. We use an `<AvatarOverlay>`
+if we have a `friend` and a normal `<Avatar>` if we don't.
+
+*/
+
+        }
+        <a
+          href={account.get('url')}
+          target='_blank'
+          className='status__display-name'
+          onClick={this.handleAccountClick}
+        >
+          <div className='status__avatar'>{
+            friend ? (
+              <AvatarOverlay account={account} friend={friend} />
+            ) : (
+              <Avatar account={account} size={48} />
+            )
+          }</div>
+          <DisplayName account={account} />
+        </a>
+
+      </header>
+    );
+  }
+
+}