Get Group profile from TagTile instead of TagPanel

So that instead of getting all group profiles everytime the tags
change order, get them when the TagTile mounts for a group tag.

src/components/structures/TagPanel.js

@@ -18,7 +18,6 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { MatrixClient } from 'matrix-js-sdk';
 import FilterStore from '../../stores/FilterStore';
-import FlairStore from '../../stores/FlairStore';
 import TagOrderStore from '../../stores/TagOrderStore';
 
 import GroupActions from '../../actions/GroupActions';
@@ -36,17 +35,7 @@ const TagPanel = React.createClass({
 
     getInitialState() {
         return {
-            // A list of group profiles for tags that are group IDs. The intention in future
-            // is to allow arbitrary tags to be selected in the TagPanel, not just groups.
-            // For now, it suffices to maintain a list of ordered group profiles.
-            orderedGroupTagProfiles: [
-            // {
-            //     groupId: '+awesome:foo.bar',{
-            //     name: 'My Awesome Community',
-            //     avatarUrl: 'mxc://...',
-            //     shortDescription: 'Some description...',
-            // },
-            ],
+            orderedTags: [],
             selectedTags: [],
         };
     },
@@ -67,15 +56,8 @@ const TagPanel = React.createClass({
             if (this.unmounted) {
                 return;
             }
-
-            const orderedTags = TagOrderStore.getOrderedTags() || [];
-            const orderedGroupTags = orderedTags.filter((t) => t[0] === '+');
-            // XXX: One profile lookup failing will bring the whole lot down
-            Promise.all(orderedGroupTags.map(
-                (groupId) => FlairStore.getGroupProfileCached(this.context.matrixClient, groupId),
-            )).then((orderedGroupTagProfiles) => {
-                if (this.unmounted) return;
-                this.setState({orderedGroupTagProfiles});
+            this.setState({
+                orderedTags: TagOrderStore.getOrderedTags() || [],
             });
         });
         // This could be done by anything with a matrix client
@@ -113,11 +95,11 @@ const TagPanel = React.createClass({
         const TintableSvg = sdk.getComponent('elements.TintableSvg');
         const DNDTagTile = sdk.getComponent('elements.DNDTagTile');
 
-        const tags = this.state.orderedGroupTagProfiles.map((groupProfile, index) => {
+        const tags = this.state.orderedTags.map((tag, index) => {
             return <DNDTagTile
-                key={groupProfile.groupId + '_' + index}
-                groupProfile={groupProfile}
-                selected={this.state.selectedTags.includes(groupProfile.groupId)}
+                key={tag + '_' + index}
+                tag={tag}
+                selected={this.state.selectedTags.includes(tag)}
                 onEndDrag={this.onTagTileEndDrag}
             />;
         });

src/components/views/elements/DNDTagTile.js

@@ -29,7 +29,7 @@ const tagTileSource = {
     beginDrag: function(props) {
         // Return the data describing the dragged item
         return {
-            tag: props.groupProfile.groupId,
+            tag: props.tag,
         };
     },
 
@@ -55,7 +55,7 @@ const tagTileTarget = {
         dis.dispatch({
             action: 'order_tag',
             tag: monitor.getItem().tag,
-            targetTag: props.groupProfile.groupId,
+            targetTag: props.tag,
             // Note: we indicate that the tag should be after the target when
             // it's being dragged over the top half of the target.
             after: draggedY < targetY,
@@ -65,7 +65,7 @@ const tagTileTarget = {
     drop(props) {
         // Return the data to be returned by getDropResult
         return {
-            tag: props.groupProfile.groupId,
+            tag: props.tag,
         };
     },
 };

src/components/views/elements/TagTile.js

@@ -22,17 +22,36 @@ import sdk from '../../../index';
 import dis from '../../../dispatcher';
 import { isOnlyCtrlOrCmdKeyEvent } from '../../../Keyboard';
 
+import FlairStore from '../../../stores/FlairStore';
+
 export default React.createClass({
     displayName: 'TagTile',
 
     propTypes: {
-        groupProfile: PropTypes.object,
+        tag: PropTypes.string,
     },
 
     contextTypes: {
         matrixClient: React.PropTypes.instanceOf(MatrixClient).isRequired,
     },
 
+    componentWillMount() {
+        this.unmounted = false;
+        if (this.props.tag[0] === '+') {
+            FlairStore.getGroupProfileCached(
+                this.context.matrixClient,
+                this.props.tag,
+            ).then((profile) => {
+                if (this.unmounted) return;
+                this.setState({profile});
+            });
+        }
+    },
+
+    componentWillUnmount() {
+        this.unmounted = true;
+    },
+
     getInitialState() {
         return {
             hover: false,
@@ -44,7 +63,7 @@ export default React.createClass({
         e.stopPropagation();
         dis.dispatch({
             action: 'select_tag',
-            tag: this.props.groupProfile.groupId,
+            tag: this.props.tag,
             ctrlOrCmdKey: isOnlyCtrlOrCmdKeyEvent(e),
             shiftKey: e.shiftKey,
         });
@@ -62,8 +81,8 @@ export default React.createClass({
         const BaseAvatar = sdk.getComponent('avatars.BaseAvatar');
         const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
         const RoomTooltip = sdk.getComponent('rooms.RoomTooltip');
-        const profile = this.props.groupProfile || {};
-        const name = profile.name || profile.groupId;
+        const profile = this.state.profile || {};
+        const name = profile.name || this.props.tag;
         const avatarHeight = 35;
 
         const httpUrl = profile.avatarUrl ? this.context.matrixClient.mxcUrlToHttp(