From 08979f37e723e90901d26578b7ac8a17e23f31cb Mon Sep 17 00:00:00 2001
From: Eric Bailey <git@esb.lol>
Date: Fri, 10 May 2024 22:39:21 -0500
Subject: Movable following feed (#3593)

* Handle home algo with backwards compat

* Remove todo, fix pwi view

* Simplify filter logic

* Handle edge case

* Handle home algo in FeedSourceCard

* Fix handling of pinned feed if home algo is disabled

* Handle home algo on ProfileFeed screen

* Rename

* Fix pinned feeds key

* Improve perf of pinned feeds with primary algo

* Update statsig API

* Revert unneeded changes

* Support following feed as well

* Better formatting

* Clarify primary algo usage

* Better comment

* Handle saved feed screen edge case

* Restore Feeds sparkle, fix line height

* Move gate call down

* Filter out primary algo from feeds page

* Filter dupe from Feeds screen

* Simplify logic

* Missing following handling

* Hide primary feed setting outside exp

* Revert testing change

* Migrate usePinnedFeedInfos

* Migrate FeedSourceCard

* Migrate Feeds screen

* Migrate SavedFeeds screen

* Handle timeline in feed infos

* Finish migrating ProfileFeed, FeedSourceCard

* Migrate ProfileList

* Finalize mutation hooks

* Allow unsaving lists

* Handle following feed on Feeds screen

* Handle following on SavedFeeds

* Get rid of deprecated interface usages

* Handle no pinned feeds

* Handle no feeds on Feeds screen

* Reuse component on SavedFeeds screen

* Handle no following feed

* Remove primary algo references

* Migrate to new plural APIs

* Remove unused event

* Prevent duplicate keys

* Make handling much more clear

* Dedupe useHeaderOffset

* Filter unknown feed types at source

* Use just following

* Immprove key handling

* Resume from last tab

* Bump sdk

* Revert Gemfile

* Additional protection in FeedSourceCard

* Fix ProfileList save/unsave handling

* Translate

* Translate

* Match existing handling post-signup

* Ensure onboarding results in correct selected feeds

* Some testing tweaks on create/onboarding

* Revert primary algo consderations

* Remove comment

* Handle default feed setting

* Rm unnecessary type cast

* Remove premature gate check

* Remove nullable check in onPageSelecting, assume the pager checks bounds

* Use null for default selected feed

* Rm unrelated change

* Remove the concept of __key__

I don't think this concept is consistent.

It's introduced on FeedSourceInfo which is used both by pinned feeds and by useFeedSourceInfoQuery. Pinned feeds use the pinning ID there. But there is no pinning ID for useFeedSourceInfoQuery. So this means this field is sometimes one thing and sometimes some other thing. That is a decent sign that it shouldn't be on that type at all.

It's not used anywhere except the desktop feed enumeration. It seems reasonable to assume there that we wouldn't want to show the same feed URL twice. (And if it does occur in the array twice, IMO we should solve that at the API level and dedupe it on read or next write.) So I think we should just use the URL in that place. (I used the descriptor, which is equivalent.)

* Dedupe pinned feeds by URL on read

* Filter timeline out of mergefeed sources

* Put FeedDescriptor into FeedSourceInfo

* Group saved info with feed for pins

This removes a loop within a loop within a loop.

* Fix Feeds link on native

---------

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>
---
 src/state/shell/selected-feed.tsx | 35 +++++++++++++++++------------------
 1 file changed, 17 insertions(+), 18 deletions(-)

(limited to 'src/state/shell/selected-feed.tsx')

diff --git a/src/state/shell/selected-feed.tsx b/src/state/shell/selected-feed.tsx
index df50b3952..08b7ba77c 100644
--- a/src/state/shell/selected-feed.tsx
+++ b/src/state/shell/selected-feed.tsx
@@ -1,47 +1,46 @@
 import React from 'react'
 
-import {Gate} from '#/lib/statsig/gates'
-import {useGate} from '#/lib/statsig/statsig'
 import {isWeb} from '#/platform/detection'
 import * as persisted from '#/state/persisted'
+import {FeedDescriptor} from '#/state/queries/post-feed'
 
-type StateContext = string
-type SetContext = (v: string) => void
+type StateContext = FeedDescriptor | null
+type SetContext = (v: FeedDescriptor) => void
 
-const stateContext = React.createContext<StateContext>('home')
+const stateContext = React.createContext<StateContext>(null)
 const setContext = React.createContext<SetContext>((_: string) => {})
 
-function getInitialFeed(gate: (gateName: Gate) => boolean) {
+function getInitialFeed(): FeedDescriptor | null {
   if (isWeb) {
     if (window.location.pathname === '/') {
       const params = new URLSearchParams(window.location.search)
       const feedFromUrl = params.get('feed')
       if (feedFromUrl) {
         // If explicitly booted from a link like /?feed=..., prefer that.
-        return feedFromUrl
+        return feedFromUrl as FeedDescriptor
       }
     }
+
     const feedFromSession = sessionStorage.getItem('lastSelectedHomeFeed')
     if (feedFromSession) {
       // Fall back to a previously chosen feed for this browser tab.
-      return feedFromSession
+      return feedFromSession as FeedDescriptor
     }
   }
-  if (!gate('start_session_with_following_v2')) {
-    const feedFromPersisted = persisted.get('lastSelectedHomeFeed')
-    if (feedFromPersisted) {
-      // Fall back to the last chosen one across all tabs.
-      return feedFromPersisted
-    }
+
+  const feedFromPersisted = persisted.get('lastSelectedHomeFeed')
+  if (feedFromPersisted) {
+    // Fall back to the last chosen one across all tabs.
+    return feedFromPersisted as FeedDescriptor
   }
-  return 'home'
+
+  return null
 }
 
 export function Provider({children}: React.PropsWithChildren<{}>) {
-  const gate = useGate()
-  const [state, setState] = React.useState(() => getInitialFeed(gate))
+  const [state, setState] = React.useState(() => getInitialFeed())
 
-  const saveState = React.useCallback((feed: string) => {
+  const saveState = React.useCallback((feed: FeedDescriptor) => {
     setState(feed)
     if (isWeb) {
       try {
-- 
cgit 1.4.1

