PLT-7379: Timestamp on deleted, ephemeral, or pending post is a permalink (#7295)

* Removed permalink from system messages, general cleanup

* Removed permalink from deleted messages

* Removed permalink from pending messages

* Fixed post_info tests

* Changed permalink logic to remove permalinks from ephemeral messages, but leave them in place for system messages.

* Fixed check style

webapp/components/post_view/post_info/post_info.jsx

@@ -9,6 +9,7 @@ import DotMenu from 'components/dot_menu';
 
 import * as Utils from 'utils/utils.jsx';
 import * as PostUtils from 'utils/post_utils.jsx';
+import * as ReduxPostUtils from 'mattermost-redux/utils/post_utils';
 import {emitEmojiPosted} from 'actions/post_actions.jsx';
 import Constants from 'utils/constants.jsx';
 import {Posts} from 'mattermost-redux/constants';
@@ -77,7 +78,7 @@ export default class PostInfo extends React.PureComponent {
              */
             addReaction: PropTypes.func.isRequired
         }).isRequired
-    }
+    };
 
     constructor(props) {
         super(props);
@@ -96,12 +97,12 @@ export default class PostInfo extends React.PureComponent {
 
         this.setState({showEmojiPicker});
         this.props.handleDropdownOpened(showEmojiPicker);
-    }
+    };
 
     hideEmojiPicker = () => {
         this.setState({showEmojiPicker: false});
         this.props.handleDropdownOpened(false);
-    }
+    };
 
     removePost() {
         this.props.actions.removePost(this.props.post);
@@ -131,7 +132,7 @@ export default class PostInfo extends React.PureComponent {
 
     getDotMenu = () => {
         return this.refs.dotMenu;
-    }
+    };
 
     render() {
         const post = this.props.post;
@@ -242,10 +243,16 @@ export default class PostInfo extends React.PureComponent {
             );
         }
 
+        // timestamp should not be a permalink if the post has been deleted, is ephemeral message, or is pending
+        const isPermalink = !(isEphemeral ||
+            Posts.POST_DELETED === this.props.post.state ||
+            ReduxPostUtils.isPostPendingOrFailed(this.props.post));
+
         return (
             <div className='post__header--info'>
                 <div className='col'>
                     <PostTime
+                        isPermalink={isPermalink}
                         eventTime={post.create_at}
                         useMilitaryTime={this.props.useMilitaryTime}
                         postId={post.id}

webapp/components/post_view/post_time.jsx

@@ -12,6 +12,11 @@ import TeamStore from 'stores/team_store.jsx';
 export default class PostTime extends React.PureComponent {
     static propTypes = {
 
+        /*
+         * If true, time will be rendered as a permalink to the post
+         */
+        isPermalink: PropTypes.bool.isRequired,
+
         /*
          * The time to display
          */
@@ -26,12 +31,12 @@ export default class PostTime extends React.PureComponent {
          * The post id of posting being rendered
          */
         postId: PropTypes.string
-    }
+    };
 
     static defaultProps = {
         eventTime: 0,
         useMilitaryTime: false
-    }
+    };
 
     constructor(props) {
         super(props);
@@ -74,7 +79,7 @@ export default class PostTime extends React.PureComponent {
     }
 
     render() {
-        if (isMobile()) {
+        if (isMobile() || !this.props.isPermalink) {
             return this.renderTimeTag();
         }