Suggest to invite people when speaking in an empty room

src/components/structures/RoomStatusBar.js

@@ -43,6 +43,10 @@ module.exports = React.createClass({
         // the end of the live timeline.
         atEndOfLiveTimeline: React.PropTypes.bool,
 
+        // This is true when the user is alone in the room, but has also sent a message.
+        // Used to suggest to the user to invite someone
+        sentMessageAndIsAlone: React.PropTypes.bool,
+
         // true if there is an active call in this room (means we show
         // the 'Active Call' text in the status bar if there is nothing
         // more interesting)
@@ -60,6 +64,14 @@ module.exports = React.createClass({
         // 'unsent messages' bar
         onCancelAllClick: React.PropTypes.func,
 
+        // callback for when the user clicks on the 'invite others' button in the
+        // 'you are alone' bar
+        onInviteClick: React.PropTypes.func,
+
+        // callback for when the user clicks on the 'stop warning me' button in the
+        // 'you are alone' bar
+        onStopWarningClick: React.PropTypes.func,
+
         // callback for when the user clicks on the 'scroll to bottom' button
         onScrollToBottomClick: React.PropTypes.func,
 
@@ -140,7 +152,8 @@ module.exports = React.createClass({
             (this.state.usersTyping.length > 0) ||
             this.props.numUnreadMessages ||
             !this.props.atEndOfLiveTimeline ||
-            this.props.hasActiveCall
+            this.props.hasActiveCall ||
+            this.props.sentMessageAndIsAlone
         ) {
             return STATUS_BAR_EXPANDED;
         } else if (this.props.unsentMessageError) {
@@ -305,6 +318,21 @@ module.exports = React.createClass({
             );
         }
 
+        // If you're alone in the room, and have sent a message, suggest to invite someone
+        if (this.props.sentMessageAndIsAlone) {
+            return (
+                <div className="mx_RoomStatusBar_isAlone">
+                    { _tJsx("There's no one else here! Would you like to <a>invite others</a> or <a>stop warning about the empty room</a>?",
+                        [/<a>(.*?)<\/a>/, /<a>(.*?)<\/a>/],
+                        [
+                            (sub) => <a className="mx_RoomStatusBar_resend_link" key="invite" onClick={this.props.onInviteClick}>{ sub }</a>,
+                            (sub) => <a className="mx_RoomStatusBar_resend_link" key="nowarn" onClick={this.props.onStopWarningClick}>{ sub }</a>,
+                        ],
+                    ) }
+                </div>
+            );
+        }
+
         return null;
     },
 

src/components/structures/RoomView.js

@@ -117,6 +117,7 @@ module.exports = React.createClass({
             guestsCanJoin: false,
             canPeek: false,
             showApps: false,
+            isAlone: false,
             isPeeking: false,
 
             // error object, as from the matrix client/server API
@@ -461,6 +462,8 @@ module.exports = React.createClass({
         switch (payload.action) {
             case 'message_send_failed':
             case 'message_sent':
+                this._checkIfAlone(this.state.room);
+                // no break; to intentionally fall through
             case 'message_send_cancelled':
                 this.setState({
                     unsentMessageError: this._getUnsentMessageError(this.state.room),
@@ -740,6 +743,20 @@ module.exports = React.createClass({
         }
     }, 500),
 
+    _checkIfAlone: function(room) {
+        let warnedAboutLonelyRoom = false;
+        if (localStorage) {
+            warnedAboutLonelyRoom = localStorage.getItem('mx_user_alone_warned_' + this.state.room.roomId);
+        }
+        if (warnedAboutLonelyRoom) {
+            if (this.state.isAlone) this.setState({isAlone: false});
+            return;
+        }
+
+        const joinedMembers = room.currentState.getMembers().filter(m => m.membership === "join" || m.membership === "invite");
+        this.setState({isAlone: joinedMembers.length === 1});
+    },
+
     _getUnsentMessageError: function(room) {
         const unsentMessages = this._getUnsentMessages(room);
         if (!unsentMessages.length) return "";
@@ -821,6 +838,22 @@ module.exports = React.createClass({
         Resend.cancelUnsentEvents(this.state.room);
     },
 
+    onInviteButtonClick: function() {
+        // call AddressPickerDialog
+        dis.dispatch({
+            action: 'view_invite',
+            roomId: this.state.room.roomId,
+        });
+        this.setState({isAlone: false}); // there's a good chance they'll invite someone
+    },
+
+    onStopAloneWarningClick: function() {
+        if (localStorage) {
+            localStorage.setItem('mx_user_alone_warned_' + this.state.room.roomId, true);
+        }
+        this.setState({isAlone: false});
+    },
+
     onJoinButtonClicked: function(ev) {
         const cli = MatrixClientPeg.get();
 
@@ -1581,9 +1614,12 @@ module.exports = React.createClass({
                 numUnreadMessages={this.state.numUnreadMessages}
                 unsentMessageError={this.state.unsentMessageError}
                 atEndOfLiveTimeline={this.state.atEndOfLiveTimeline}
+                sentMessageAndIsAlone={this.state.isAlone}
                 hasActiveCall={inCall}
                 onResendAllClick={this.onResendAllClick}
                 onCancelAllClick={this.onCancelAllClick}
+                onInviteClick={this.onInviteButtonClick}
+                onStopWarningClick={this.onStopAloneWarningClick}
                 onScrollToBottomClick={this.jumpToLiveTimeline}
                 onResize={this.onChildResize}
                 onVisible={this.onStatusBarVisible}

src/i18n/strings/en_EN.json

@@ -610,6 +610,7 @@
     "Room": "Room",
     "Copied!": "Copied!",
     "Failed to copy": "Failed to copy",
+    "There's no one else here! Would you like to <a>invite others</a> or <a>stop warning about the empty room</a>?": "There's no one else here! Would you like to <a>invite others</a> or <a>stop warning about the empty room</a>?",
     "Connectivity to the server has been lost.": "Connectivity to the server has been lost.",
     "Sent messages will be stored until your connection has returned.": "Sent messages will be stored until your connection has returned.",
     "<a>Resend all</a> or <a>cancel all</a> now. You can also select individual messages to resend or cancel.": "<a>Resend all</a> or <a>cancel all</a> now. You can also select individual messages to resend or cancel.",