From 1e34e622595a2caf171b1091c98e1b40a66d44d9 Mon Sep 17 00:00:00 2001
From: Paul Frazee <pfrazee@gmail.com>
Date: Tue, 21 Mar 2023 13:36:27 -0500
Subject: Elide long threads in the feed (close #333)

---
 src/view/com/posts/FeedSlice.tsx | 83 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

(limited to 'src/view/com/posts/FeedSlice.tsx')

diff --git a/src/view/com/posts/FeedSlice.tsx b/src/view/com/posts/FeedSlice.tsx
index 1dba8ac93..4df6d4f54 100644
--- a/src/view/com/posts/FeedSlice.tsx
+++ b/src/view/com/posts/FeedSlice.tsx
@@ -1,6 +1,12 @@
 import React from 'react'
+import {StyleSheet, View} from 'react-native'
 import {FeedSliceModel} from 'state/models/feed-view'
+import {AtUri} from '../../../third-party/uri'
+import {Link} from '../util/Link'
+import {Text} from '../util/text/Text'
+import Svg, {Circle, Line} from 'react-native-svg'
 import {FeedItem} from './FeedItem'
+import {usePalette} from 'lib/hooks/usePalette'
 
 export function FeedSlice({
   slice,
@@ -11,6 +17,39 @@ export function FeedSlice({
   showFollowBtn?: boolean
   ignoreMuteFor?: string
 }) {
+  if (slice.isThread && slice.items.length > 3) {
+    const last = slice.items.length - 1
+    return (
+      <>
+        <FeedItem
+          key={slice.items[0]._reactKey}
+          item={slice.items[0]}
+          isThreadParent={slice.isThreadParentAt(0)}
+          isThreadChild={slice.isThreadChildAt(0)}
+          showFollowBtn={showFollowBtn}
+          ignoreMuteFor={ignoreMuteFor}
+        />
+        <FeedItem
+          key={slice.items[1]._reactKey}
+          item={slice.items[1]}
+          isThreadParent={slice.isThreadParentAt(1)}
+          isThreadChild={slice.isThreadChildAt(1)}
+          showFollowBtn={showFollowBtn}
+          ignoreMuteFor={ignoreMuteFor}
+        />
+        <ViewFullThread slice={slice} />
+        <FeedItem
+          key={slice.items[last]._reactKey}
+          item={slice.items[last]}
+          isThreadParent={slice.isThreadParentAt(last)}
+          isThreadChild={slice.isThreadChildAt(last)}
+          showFollowBtn={showFollowBtn}
+          ignoreMuteFor={ignoreMuteFor}
+        />
+      </>
+    )
+  }
+
   return (
     <>
       {slice.items.map((item, i) => (
@@ -26,3 +65,47 @@ export function FeedSlice({
     </>
   )
 }
+
+function ViewFullThread({slice}: {slice: FeedSliceModel}) {
+  const pal = usePalette('default')
+  const itemHref = React.useMemo(() => {
+    const urip = new AtUri(slice.rootItem.post.uri)
+    return `/profile/${slice.rootItem.post.author.handle}/post/${urip.rkey}`
+  }, [slice.rootItem.post.uri, slice.rootItem.post.author.handle])
+
+  return (
+    <Link style={[pal.view, styles.viewFullThread]} href={itemHref} noFeedback>
+      <View style={styles.viewFullThreadDots}>
+        <Svg width="4" height="30">
+          <Line
+            x1="2"
+            y1="0"
+            x2="2"
+            y2="8"
+            stroke={pal.colors.replyLine}
+            strokeWidth="2"
+          />
+          <Circle x="2" y="16" r="1.5" fill={pal.colors.replyLineDot} />
+          <Circle x="2" y="22" r="1.5" fill={pal.colors.replyLineDot} />
+          <Circle x="2" y="28" r="1.5" fill={pal.colors.replyLineDot} />
+        </Svg>
+      </View>
+      <Text type="md" style={pal.link}>
+        View full thread
+      </Text>
+    </Link>
+  )
+}
+
+const styles = StyleSheet.create({
+  viewFullThread: {
+    paddingTop: 14,
+    paddingBottom: 6,
+    paddingLeft: 80,
+  },
+  viewFullThreadDots: {
+    position: 'absolute',
+    left: 41,
+    top: 0,
+  },
+})
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