common/globalConfig.ts

@@ -0,0 +1,3 @@
+export type GlobalConfig = {
+  pinnedItems: { itemId: string; type: 'post' | 'contract' }[]
+}

firestore.rules

@@ -23,6 +23,12 @@ service cloud.firestore {
       allow read;
     }
 
+    match /globalConfig/globalConfig {
+      allow read;
+      allow update: if isAdmin()
+      allow create: if isAdmin()
+    }
+
     match /users/{userId} {
       allow read;
       allow update: if userId == request.auth.uid

web/components/groups/group-overview.tsx

@@ -231,7 +231,6 @@ export function PinnedItems(props: {
   return pinned.length > 0 || isEditable ? (
     <div>
       <Row className="mb-3 items-center justify-between">
-        <SectionHeader label={'Pinned'} />
         {isEditable && (
           <Button
             color="gray"

web/components/pinned-select-modal.tsx

@@ -70,7 +70,7 @@ export function PinnedSelectModal(props: {
 
   return (
     <Modal open={open} setOpen={setOpen} className={' sm:p-0'} size={'lg'}>
-      <Col className="h-[85vh] w-full gap-4 rounded-md bg-white">
+      <Col className=" h-[85vh] w-full gap-4 overflow-scroll rounded-md bg-white">
         <div className=" p-8 pb-0">
           <Row>
             <div className={'text-xl text-indigo-700'}>{title}</div>

web/hooks/use-global-config.ts

@@ -0,0 +1,12 @@
+import { GlobalConfig } from 'common/globalConfig'
+import { useEffect, useState } from 'react'
+import { listenForGlobalConfig } from 'web/lib/firebase/globalConfig'
+
+export const useGlobalConfig = () => {
+  const [globalConfig, setGlobalConfig] = useState<GlobalConfig | null>(null)
+
+  useEffect(() => {
+    listenForGlobalConfig(setGlobalConfig)
+  }, [globalConfig])
+  return globalConfig
+}

web/hooks/use-post.ts

@@ -1,6 +1,10 @@
 import { useEffect, useState } from 'react'
 import { DateDoc, Post } from 'common/post'
-import { listenForDateDocs, listenForPost } from 'web/lib/firebase/posts'
+import {
+  getAllPosts,
+  listenForDateDocs,
+  listenForPost,
+} from 'web/lib/firebase/posts'
 
 export const usePost = (postId: string | undefined) => {
   const [post, setPost] = useState<Post | null | undefined>()
@@ -38,6 +42,14 @@ export const usePosts = (postIds: string[]) => {
     .sort((a, b) => b.createdTime - a.createdTime)
 }
 
+export const useAllPosts = () => {
+  const [posts, setPosts] = useState<Post[]>([])
+  useEffect(() => {
+    getAllPosts().then(setPosts)
+  }, [])
+  return posts
+}
+
 export const useDateDocs = () => {
   const [dateDocs, setDateDocs] = useState<DateDoc[]>()
 

web/lib/firebase/globalConfig.ts

@@ -0,0 +1,33 @@
+import {
+  CollectionReference,
+  doc,
+  collection,
+  getDoc,
+  updateDoc,
+} from 'firebase/firestore'
+import { db } from 'web/lib/firebase/init'
+import { GlobalConfig } from 'common/globalConfig'
+import { listenForValue } from './utils'
+
+const globalConfigCollection = collection(
+  db,
+  'globalConfig'
+) as CollectionReference<GlobalConfig>
+const globalConfigDoc = doc(globalConfigCollection, 'globalConfig')
+
+export const getGlobalConfig = async () => {
+  return (await getDoc(globalConfigDoc)).data()
+}
+
+export function updateGlobalConfig(
+  globalConfig: GlobalConfig,
+  updates: Partial<GlobalConfig>
+) {
+  return updateDoc(globalConfigDoc, updates)
+}
+
+export function listenForGlobalConfig(
+  setGlobalConfig: (globalConfig: GlobalConfig | null) => void
+) {
+  return listenForValue(globalConfigDoc, setGlobalConfig)
+}

web/lib/firebase/posts.ts

@@ -52,6 +52,10 @@ export async function listPosts(postIds?: string[]) {
   return Promise.all(postIds.map(getPost))
 }
 
+export function getAllPosts() {
+  return getValues<Post>(posts)
+}
+
 export async function getDateDocs() {
   const q = query(posts, where('type', '==', 'date-doc'))
   return getValues<DateDoc>(q)

web/pages/home/index.tsx

@@ -1,4 +1,4 @@
-import React, { ReactNode, useEffect } from 'react'
+import React, { ReactNode, useEffect, useState } from 'react'
 import Router from 'next/router'
 import {
   AdjustmentsIcon,
@@ -42,7 +42,7 @@ import { filterDefined } from 'common/util/array'
 import { updateUser } from 'web/lib/firebase/users'
 import { isArray, keyBy } from 'lodash'
 import { usePrefetch } from 'web/hooks/use-prefetch'
-import { CPMMBinaryContract } from 'common/contract'
+import { Contract, CPMMBinaryContract } from 'common/contract'
 import {
   useContractsByDailyScoreNotBetOn,
   useContractsByDailyScoreGroups,
@@ -52,6 +52,16 @@ import {
 import { ProfitBadge } from 'web/components/profit-badge'
 import { LoadingIndicator } from 'web/components/loading-indicator'
 import { Input } from 'web/components/input'
+import { PinnedItems } from 'web/components/groups/group-overview'
+import { updateGlobalConfig } from 'web/lib/firebase/globalConfig'
+import { getPost } from 'web/lib/firebase/posts'
+import { PostCard } from 'web/components/post-card'
+import { getContractFromId } from 'web/lib/firebase/contracts'
+import { ContractCard } from 'web/components/contract/contract-card'
+import { Post } from 'common/post'
+import { isAdmin } from 'common/envs/constants'
+import { useAllPosts } from 'web/hooks/use-post'
+import { useGlobalConfig } from 'web/hooks/use-global-config'
 
 export default function Home() {
   const user = useUser()
@@ -160,11 +170,12 @@ export default function Home() {
 }
 
 const HOME_SECTIONS = [
+  { label: 'Featured', id: 'featured' },
   { label: 'Daily trending', id: 'daily-trending' },
   { label: 'Daily movers', id: 'daily-movers' },
   { label: 'Trending', id: 'score' },
   { label: 'New', id: 'newest' },
-]
+] as const
 
 export const getHomeItems = (sections: string[]) => {
   // Accommodate old home sections.
@@ -200,17 +211,25 @@ function renderSections(
     score: CPMMBinaryContract[]
   }
 ) {
+  type sectionTypes = typeof HOME_SECTIONS[number]['id']
+
   return (
     <>
       {sections.map((s) => {
         const { id, label } = s as {
-          id: keyof typeof sectionContracts
+          id: sectionTypes
           label: string
         }
         if (id === 'daily-movers') {
           return <DailyMoversSection key={id} {...sectionContracts[id]} />
         }
 
+        if (id === 'featured') {
+          // For now, only admins can see the featured section, until we all agree its ship-ready
+          if (!isAdmin) return <></>
+          return <FeaturedSection />
+        }
+
         const contracts = sectionContracts[id]
 
         if (id === 'daily-trending') {
@@ -324,6 +343,78 @@ function SearchSection(props: {
   )
 }
 
+function FeaturedSection() {
+  const [pinned, setPinned] = useState<JSX.Element[]>([])
+  const posts = useAllPosts()
+  const globalConfig = useGlobalConfig()
+
+  useEffect(() => {
+    const pinnedItems = globalConfig?.pinnedItems
+
+    async function getPinned() {
+      if (pinnedItems == null) {
+        if (globalConfig != null) {
+          updateGlobalConfig(globalConfig, { pinnedItems: [] })
+        }
+      } else {
+        const itemComponents = await Promise.all(
+          pinnedItems.map(async (element) => {
+            if (element.type === 'post') {
+              const post = await getPost(element.itemId)
+              if (post) {
+                return <PostCard post={post as Post} />
+              }
+            } else if (element.type === 'contract') {
+              const contract = await getContractFromId(element.itemId)
+              if (contract) {
+                return <ContractCard contract={contract as Contract} />
+              }
+            }
+          })
+        )
+        setPinned(
+          itemComponents.filter(
+            (element) => element != undefined
+          ) as JSX.Element[]
+        )
+      }
+    }
+    getPinned()
+  }, [globalConfig])
+
+  async function onSubmit(selectedItems: { itemId: string; type: string }[]) {
+    if (globalConfig == null) return
+    await updateGlobalConfig(globalConfig, {
+      pinnedItems: [
+        ...(globalConfig?.pinnedItems ?? []),
+        ...(selectedItems as { itemId: string; type: 'contract' | 'post' }[]),
+      ],
+    })
+  }
+
+  function onDeleteClicked(index: number) {
+    if (globalConfig == null) return
+    const newPinned = globalConfig.pinnedItems.filter((item) => {
+      return item.itemId !== globalConfig.pinnedItems[index].itemId
+    })
+    updateGlobalConfig(globalConfig, { pinnedItems: newPinned })
+  }
+
+  return (
+    <Col>
+      <SectionHeader label={'Featured'} href={`#`} />
+      <PinnedItems
+        posts={posts}
+        isEditable={true}
+        pinned={pinned}
+        onDeleteClicked={onDeleteClicked}
+        onSubmit={onSubmit}
+        modalMessage={'Pin posts or markets to the overview of this group.'}
+      />
+    </Col>
+  )
+}
+
 function GroupSection(props: {
   group: Group
   user: User