Add back button to RHS threads from pinned posts (#6306)

webapp/components/rhs_header_post.jsx

@@ -6,7 +6,7 @@ import Constants from 'utils/constants.jsx';
 import {Tooltip, OverlayTrigger} from 'react-bootstrap';
 
 import * as GlobalActions from 'actions/global_actions.jsx';
-import {getFlaggedPosts} from 'actions/post_actions.jsx';
+import {getFlaggedPosts, getPinnedPosts} from 'actions/post_actions.jsx';
 
 import {FormattedMessage} from 'react-intl';
 
@@ -24,15 +24,18 @@ export default class RhsHeaderPost extends React.Component {
 
         this.state = {};
     }
+
     handleClose(e) {
         e.preventDefault();
         GlobalActions.emitCloseRightHandSide();
         this.props.shrink();
     }
+
     toggleSize(e) {
         e.preventDefault();
         this.props.toggleSize();
     }
+
     handleBack(e) {
         e.preventDefault();
 
@@ -50,8 +53,11 @@ export default class RhsHeaderPost extends React.Component {
             });
         } else if (this.props.fromFlaggedPosts) {
             getFlaggedPosts();
+        } else if (this.props.fromPinnedPosts) {
+            getPinnedPosts();
         }
     }
+
     render() {
         let back;
         const closeSidebarTooltip = (
@@ -91,6 +97,15 @@ export default class RhsHeaderPost extends React.Component {
                     />
                 </Tooltip>
             );
+        } else if (this.props.fromPinnedPosts) {
+            backToResultsTooltip = (
+                <Tooltip id='backToResultsTooltip'>
+                    <FormattedMessage
+                        id='rhs_header.backToPinnedTooltip'
+                        defaultMessage='Back to Pinned Posts'
+                    />
+                </Tooltip>
+            );
         }
 
         const expandSidebarTooltip = (
@@ -111,7 +126,7 @@ export default class RhsHeaderPost extends React.Component {
             </Tooltip>
         );
 
-        if (this.props.fromSearch || this.props.fromFlaggedPosts || this.props.isWebrtc) {
+        if (this.props.fromSearch || this.props.fromFlaggedPosts || this.props.isWebrtc || this.props.fromPinnedPosts) {
             back = (
                 <a
                     href='#'
@@ -190,6 +205,7 @@ RhsHeaderPost.propTypes = {
     isWebrtc: React.PropTypes.bool,
     fromSearch: React.PropTypes.string,
     fromFlaggedPosts: React.PropTypes.bool,
+    fromPinnedPosts: React.PropTypes.bool,
     toggleSize: React.PropTypes.func,
     shrink: React.PropTypes.func
 };