Add panel for pinned messages.

Signed-off-by: Travis Ralston <travpc@gmail.com>

src/components/views/rooms/PinnedEventsPanel.js

@@ -0,0 +1,106 @@
+/*
+Copyright 2017 Travis Ralston
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+'use strict';
+
+var React = require('react');
+var MatrixClientPeg = require('matrix-react-sdk/lib/MatrixClientPeg');
+var sdk = require('matrix-react-sdk');
+var AccessibleButton = require('matrix-react-sdk/lib/components/views/elements/AccessibleButton');
+import { _t } from "matrix-react-sdk/lib/languageHandler";
+import { EventTimeline } from "matrix-js-sdk";
+
+module.exports = React.createClass({
+    displayName: 'PinnedEventsPanel',
+    propTypes: {
+        // The Room from the js-sdk we're going to show pinned events for
+        room: React.PropTypes.object.isRequired,
+
+        onCancelClick: React.PropTypes.func,
+    },
+
+    getInitialState: function() {
+        return {
+            loading: true,
+        };
+    },
+
+    componentDidMount: function() {
+        const pinnedEvents = this.props.room.currentState.getStateEvents("m.room.pinned_events", "");
+        if (!pinnedEvents || !pinnedEvents.getContent().pinned) {
+            this.setState({ loading: false, pinned: [] });
+        } else {
+            const promises = [];
+            const cli = MatrixClientPeg.get();
+
+            pinnedEvents.getContent().pinned.map(eventId => {
+                promises.push(cli.getEventTimeline(this.props.room.getUnfilteredTimelineSet(), eventId, 0).then(timeline => {
+                    return {eventId, timeline};
+                }));
+            });
+
+            Promise.all(promises).then(contexts => {
+                this.setState({ loading: false, pinned: contexts });
+            });
+        }
+    },
+
+    _getPinnedTiles: function() {
+        const MessageEvent = sdk.getComponent("views.messages.MessageEvent");
+        const MemberAvatar = sdk.getComponent("views.avatars.MemberAvatar");
+
+        if (this.state.pinned.length == 0) {
+            return <div>No pinned messages.</div>;
+        }
+
+        return this.state.pinned.map(pinnedEvent => {
+            const event = pinnedEvent.timeline.getEvents().find(e => e.getId() === pinnedEvent.eventId);
+            const sender = this.props.room.getMember(event.getSender());
+            const avatarSize = 40;
+
+            // Don't show non-messages. Technically users can pin state/custom events, but we won't
+            // support those events.
+            if (event.getType() !== "m.room.message") return '';
+
+            return (
+                <div key={"pinnedEvent_" + pinnedEvent.eventId} className="mx_PinnedEventsPanel_pinnedEvent">
+                    <MemberAvatar member={sender} width={avatarSize} height={avatarSize} />
+                    <span className="mx_PinnedEventsPanel_sender">
+                        {sender.name}
+                    </span>
+                    <MessageEvent mxEvent={event} className="mx_PinnedEventsPanel_body" />
+                </div>
+            );
+        });
+    },
+
+    render: function() {
+        let tiles = <div>Loading...</div>;
+        if (this.state && !this.state.loading) {
+            tiles = this._getPinnedTiles();
+        }
+
+        return (
+            <div className="mx_PinnedEventsPanel">
+                <div className="mx_PinnedEventsPanel_body">
+                    <AccessibleButton className="mx_PinnedEventsPanel_cancel" onClick={this.props.onCancelClick}><img src="img/cancel.svg" width="18" height="18" /></AccessibleButton>
+                    <h3 className="mx_PinnedEventsPanel_header">{_t("Pinned Messages")}</h3>
+                    { tiles }
+                </div>
+            </div>
+        );
+    }
+});