Ensure timeline interruption only gets rendered after the posts. Fixes #38

src/components/pages/feed.js

@@ -13,6 +13,7 @@ import * as requests from "src/requests";
 const FeedJsx = (props) => {
     const [state, setState] = useState({
         loaded: false,
+        postsRendered: false,
     });
 
     useEffect(() => {
@@ -63,27 +64,20 @@ const FeedJsx = (props) => {
             );
     }, []);
 
-    return (
-        <>
-            { state.loaded
-                ? <ScreenWithTrayJsx
-                        active = "Feed"
-                        contentContainerStyle = {
-                            state.posts.length == 0
-                                ? styles.ifCaughtUp
-                                : {}
-                        }
-                        navigation = { props.navigation }>
+    const _handleTimelineLoaded = () => setState({...state,
+        postsRendered: true,
+    });
 
-                    <TimelineViewJsx
-                            navigation = { props.navigation }
-                            posts = { state.posts } />
+    let endOfTimelineMessage = <></>;
+    if (state.postsRendered) {
+        // Only render the timeline interruption if all of the posts have been
+        // rendered in the feed.
+        endOfTimelineMessage = <>
             <View style = {
                 state.posts.length == 0
                     ? {}
                     : styles.interruption.topBorder
               }>
-
                 <View style = { styles.interruption.inner }>
                     <Ionicons
                         name="ios-checkmark-circle-outline"
@@ -104,6 +98,26 @@ const FeedJsx = (props) => {
                     </TouchableWithoutFeedback>
                 </View>
             </View>
+        </>;
+    }
+
+    return (
+        <>
+            { state.loaded
+                ? <ScreenWithTrayJsx
+                        active = "Feed"
+                        contentContainerStyle = {
+                            state.posts.length == 0
+                                ? styles.ifCaughtUp
+                                : {}
+                        }
+                        navigation = { props.navigation }>
+
+                    <TimelineViewJsx
+                            navigation = { props.navigation }
+                            posts = { state.posts }
+                            onTimelineLoaded = { _handleTimelineLoaded }/>
+                    { endOfTimelineMessage }
                 </ScreenWithTrayJsx>
                 : <></>
             }

src/components/posts/post.js

@@ -180,8 +180,8 @@ export const RawPostJsx = (props) => {
 
 export const PostByDataJsx = (props) => {
     /*
-    Renders a post where the data is supplied directly to the element through
-    its properties, as it is in a timeline.
+     * Renders a post where the data is supplied directly to the element through
+     * its properties, as it is in a timeline.
     */
 
     let [state, setState] = useState({
@@ -217,6 +217,10 @@ export const PostByDataJsx = (props) => {
                     own,
                     loaded: true
                 });
+
+                if (props.onPostLoaded != null) {
+                    props.onPostLoaded();
+                }
             });
     }, []);
 
@@ -417,13 +421,6 @@ const styles = {
     }
 };
 
-// customStyles for react-native-popup-menu should be defined in particular
-// objects to be interpreted correctly.
-
-//const menuStyles = {
-//    menuProviderWrapper
-//}
-
 const optionsStyles = {
     optionWrapper: { // The wrapper around a single option
         paddingLeft: SCREEN_WIDTH / 15,

src/components/posts/timeline-view.js

@@ -1,15 +1,30 @@
-import React from "react";
+import React, { useState, useEffect } from "react";
 import { View } from "react-native";
 
 import { PostByDataJsx } from "src/components/posts/post";
 
 const TimelineViewJsx = (props) => {
+    // Count the number of posts that have already loaded
+    const [postsLoaded, setPostsLoaded] = useState(0);
+
     // Ensure only posts with media get in the timeline
     const posts = props.posts.filter(
         p => p.media_attachments != null
           && p.media_attachments.length > 0
     );
 
+    useEffect(() => {
+        // When all the posts have been loaded, call onTimelineLoaded
+        // if it's been defined
+        if (postsLoaded == posts.length) {
+            if (props.onTimelineLoaded != null) {
+                props.onTimelineLoaded();
+            }
+        }
+    }, [postsLoaded]);
+
+    _handlePostLoaded = () => setPostsLoaded(postsLoaded + 1);
+
     return (
         <View>
             { props.posts.map((post, i) => {
@@ -17,7 +32,8 @@ const TimelineViewJsx = (props) => {
                     <View key = { i } >
                         <PostByDataJsx
                             navigation = { props.navigation }
-                            data = { post } />
+                            data = { post }
+                            onPostLoaded = { _handlePostLoaded }/>
                     </View>
                 );
             }) }