Add a page which lists all markets

TODO: Add in functionality

web/lib/firebase/contracts.ts

@@ -11,6 +11,7 @@ import {
   onSnapshot,
   orderBy,
   getDoc,
+  limit,
 } from 'firebase/firestore'
 
 export type Contract = {
@@ -47,9 +48,7 @@ export async function getContract(contractId: string) {
   const docRef = doc(db, 'contracts', contractId)
   const result = await getDoc(docRef)
 
-  return result.exists()
+  return result.exists() ? (result.data() as Contract) : undefined
-    ? result.data() as Contract
-    : undefined
 }
 
 export async function deleteContract(contractId: string) {
@@ -64,9 +63,13 @@ export async function listContracts(creatorId: string): Promise<Contract[]> {
     orderBy('createdTime', 'desc')
   )
   const snapshot = await getDocs(q)
-  const contracts: Contract[] = []
+  return snapshot.docs.map((doc) => doc.data() as Contract)
-  snapshot.forEach((doc) => contracts.push(doc.data() as Contract))
+}
-  return contracts
+
+export async function listAllContracts(): Promise<Contract[]> {
+  const q = query(contractCollection, orderBy('createdTime', 'desc'), limit(25))
+  const snapshot = await getDocs(q)
+  return snapshot.docs.map((doc) => doc.data() as Contract)
 }
 
 export function listenForContract(

web/pages/markets.tsx

@@ -0,0 +1,89 @@
+import dayjs from 'dayjs'
+import React, { useEffect, useState } from 'react'
+import { Header } from '../components/header'
+import { Col } from '../components/layout/col'
+import { Row } from '../components/layout/row'
+import { Spacer } from '../components/layout/spacer'
+import { Title } from '../components/title'
+import { listAllContracts } from '../lib/firebase/contracts'
+import { Contract } from '../lib/firebase/contracts'
+import { formatWithCommas } from '../lib/util/format'
+
+function ContractCard(props: { contract: Contract }) {
+  const { contract } = props
+
+  // Copied from contract-overview.tsx
+  const { pot, seedAmounts, createdTime } = contract
+  const volume = pot.YES + pot.NO - seedAmounts.YES - seedAmounts.NO
+  const prob = pot.YES ** 2 / (pot.YES ** 2 + pot.NO ** 2)
+  const probPercent = Math.round(prob * 100) + '%'
+
+  return (
+    <li className="col-span-1 bg-white hover:bg-gray-100 rounded-lg shadow divide-y divide-gray-200">
+      <div className="card">
+        <div className="card-body p-6">
+          <div className="flex justify-between gap-2">
+            {/* Left side of card */}
+            <div>
+              <p className="font-medium text-indigo-700">{contract.question}</p>
+              <Spacer h={8} />
+              {/* Copied from contract-overview.tsx */}
+              <Row className="flex-wrap text-sm text-gray-600">
+                <div className="whitespace-nowrap">
+                  By {contract.creatorName}
+                </div>
+                <div className="mx-2">•</div>
+                <div className="whitespace-nowrap">
+                  {dayjs(createdTime).format('MMM D')}
+                </div>
+                <div className="mx-2">•</div>
+                <div className="whitespace-nowrap">
+                  {formatWithCommas(volume)} vol
+                </div>
+              </Row>
+            </div>
+            {/* Right side of card */}
+            <Col>
+              <Col className="text-4xl mb-2 mx-auto text-primary items-end">
+                {probPercent}
+              </Col>
+              {/* Show a yes and a no button side-by-side */}
+              <div className="flex items-center text-xs gap-1">
+                <button className="bg-primary text-white font-medium px-4 py-2 rounded-lg">
+                  YES
+                </button>
+                <button className="bg-gray-200 text-gray-600 font-medium px-4 py-2 rounded-lg">
+                  NO
+                </button>
+              </div>
+            </Col>
+          </div>
+        </div>
+      </div>
+    </li>
+  )
+}
+
+export default function Markets() {
+  const [contracts, setContracts] = useState<Contract[]>([])
+  useEffect(() => {
+    listAllContracts().then(setContracts)
+  }, [])
+
+  return (
+    <div>
+      <Header />
+      <div className="max-w-4xl py-8 mx-auto">
+        <Title text="Newest markets" />
+        <ul
+          role="list"
+          className="grid grid-cols-1 gap-6 sm:grid-cols-1 lg:grid-cols-2"
+        >
+          {contracts.map((contract) => (
+            <ContractCard contract={contract} key={contract.id} />
+          ))}
+        </ul>
+      </div>
+    </div>
+  )
+}