Revert infinite scroll in timelines back to looking at ID of oldest

loaded status; do not preload submitted statuses into community/public
timelines, unless those timelines have already been loaded; do not
close streaming API connections for community/public timelines, once
they have been established (most users navigate back to them eventually)

app/assets/javascripts/components/actions/compose.jsx

@@ -85,8 +85,13 @@ export function submitCompose() {
       dispatch(updateTimeline('home', { ...response.data }));
 
       if (response.data.in_reply_to_id === null && response.data.visibility === 'public') {
-        dispatch(updateTimeline('community', { ...response.data }));
-        dispatch(updateTimeline('public', { ...response.data }));
+        if (getState.getIn(['timelines', 'community', 'loaded'])) {
+          dispatch(updateTimeline('community', { ...response.data }));
+        }
+
+        if (getState.getIn(['timelines', 'public', 'loaded'])) {
+          dispatch(updateTimeline('public', { ...response.data }));
+        }
       }
     }).catch(function (error) {
       dispatch(submitComposeFail(error));

app/assets/javascripts/components/actions/timelines.jsx

@@ -106,18 +106,20 @@ export function expandTimeline(timeline) {
       return;
     }
 
-    const next   = getState().getIn(['timelines', timeline, 'next']);
-    const params = getState().getIn(['timelines', timeline, 'params'], {});
-
-    if (next === null) {
+    if (getState().getIn(['timelines', timeline, 'items']).size === 0) {
       return;
     }
 
+    const path   = getState().getIn(['timelines', timeline, 'path'])(getState().getIn(['timelines', timeline, 'id']));
+    const params = getState().getIn(['timelines', timeline, 'params'], {});
+    const lastId = getState().getIn(['timelines', timeline, 'items']).last();
+
     dispatch(expandTimelineRequest(timeline));
 
-    api(getState).get(next, {
+    api(getState).get(path, {
       params: {
         ...params,
+        max_id: lastId,
         limit: 10
       }
     }).then(response => {

app/assets/javascripts/components/features/community_timeline/index.jsx

@@ -20,6 +20,8 @@ const mapStateToProps = state => ({
   accessToken: state.getIn(['meta', 'access_token'])
 });
 
+let subscription;
+
 const CommunityTimeline = React.createClass({
 
   propTypes: {
@@ -36,7 +38,11 @@ const CommunityTimeline = React.createClass({
 
     dispatch(refreshTimeline('community'));
 
-    this.subscription = createStream(accessToken, 'public:local', {
+    if (typeof subscription !== 'undefined') {
+      return;
+    }
+
+    subscription = createStream(accessToken, 'public:local', {
 
       received (data) {
         switch(data.event) {
@@ -53,10 +59,10 @@ const CommunityTimeline = React.createClass({
   },
 
   componentWillUnmount () {
-    if (typeof this.subscription !== 'undefined') {
-      this.subscription.close();
-      this.subscription = null;
-    }
+    // if (typeof subscription !== 'undefined') {
+    //   subscription.close();
+    //   subscription = null;
+    // }
   },
 
   render () {

app/assets/javascripts/components/features/public_timeline/index.jsx

@@ -20,6 +20,8 @@ const mapStateToProps = state => ({
   accessToken: state.getIn(['meta', 'access_token'])
 });
 
+let subscription;
+
 const PublicTimeline = React.createClass({
 
   propTypes: {
@@ -36,7 +38,11 @@ const PublicTimeline = React.createClass({
 
     dispatch(refreshTimeline('public'));
 
-    this.subscription = createStream(accessToken, 'public', {
+    if (typeof subscription !== 'undefined') {
+      return;
+    }
+
+    subscription = createStream(accessToken, 'public', {
 
       received (data) {
         switch(data.event) {
@@ -53,10 +59,10 @@ const PublicTimeline = React.createClass({
   },
 
   componentWillUnmount () {
-    if (typeof this.subscription !== 'undefined') {
-      this.subscription.close();
-      this.subscription = null;
-    }
+    // if (typeof subscription !== 'undefined') {
+    //   subscription.close();
+    //   subscription = null;
+    // }
   },
 
   render () {

app/assets/stylesheets/components.scss

@@ -576,6 +576,7 @@ a.status__content__spoiler-link {
     color: $color1;
     overflow: hidden;
     text-overflow: ellipsis;
+    white-space: nowrap;
 
     &:focus {
       outline: none;