manifold/web/pages/contract/index.tsx

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import { useEffect, useState } from 'react'
import { ContractsList } from '../../components/contracts-list'
import { Header } from '../../components/header'
import { useUser } from '../../hooks/use-user'
import {
Contract,
listContracts,
setContract as pushContract,
} from '../../lib/firebase/contracts'
// Allow user to create a new contract
// TODO: Extract to a reusable UI, for listing contracts too?
export default function NewContract() {
const creator = useUser()
const [contract, setContract] = useState<Contract>({
id: '',
creatorId: '',
question: '',
description: '',
seedAmounts: { YES: 100, NO: 100 },
// TODO: Set create time to Firestore timestamp
createdTime: Date.now(),
lastUpdatedTime: Date.now(),
} as Contract)
const [contracts, setContracts] = useState<Contract[]>([])
useEffect(() => {
if (creator?.id) {
setContract((contract) => ({
...contract,
creatorId: creator.id,
creatorName: creator.name,
}))
listContracts(creator?.id).then(setContracts)
}
}, [creator?.id])
async function saveContract() {
await pushContract(contract)
// Update local contract list
setContracts([{ ...contract }, ...contracts])
}
function saveField(field: keyof Contract) {
return (changeEvent: React.ChangeEvent<any>) =>
setContract((c) => ({ ...c, [field]: changeEvent.target.value }))
}
const descriptionPlaceholder = `e.g. This market will resolve to “Yes” if, by June 2, 2021, 11:59:59 PM ET, Paxlovid (also known under PF-07321332)...`
return (
<div>
<Header />
<div className="max-w-4xl my-20 lg:mx-auto mx-4">
<h1 className="text-2xl font-major-mono text-indigo-300 font-bold mt-6 mb-4">
Create a new prediction market
</h1>
<div className="w-full bg-gray-500 rounded-lg shadow-xl p-6">
{/* Create a Tailwind form that takes in all the fields needed for a new contract */}
{/* When the form is submitted, create a new contract in the database */}
<form>
<div className="form-control">
<label className="label">
<span className="label-text">Contract ID</span>
</label>
<input
type="text"
placeholder="e.g. COVID-123"
className="input"
value={contract.id}
onChange={saveField('id')}
/>
</div>
<div className="form-control">
<label className="label">
<span className="label-text">Question</span>
</label>
<input
type="text"
placeholder="e.g. Will the FDA approve Paxlovid before Jun 2nd, 2022?"
className="input"
value={contract.question}
onChange={saveField('question')}
/>
</div>
<div className="form-control">
<label className="label">
<span className="label-text">Description</span>
</label>
<textarea
className="textarea h-24 textarea-bordered"
placeholder={descriptionPlaceholder}
value={contract.description}
onChange={saveField('description')}
></textarea>
</div>
<div className="mt-6 grid grid-cols-1 gap-y-6 gap-x-4 sm:grid-cols-6">
<div className="sm:col-span-3">
<div className="form-control">
<label className="label">
<span className="label-text">Yes Seed</span>
</label>
<input
type="number"
placeholder="100"
className="input"
value={contract.seedAmounts.YES}
onChange={(e) => {
setContract({
...contract,
seedAmounts: {
...contract.seedAmounts,
YES: parseInt(e.target.value),
},
})
}}
/>
</div>
</div>
<div className="sm:col-span-3">
<div className="form-control">
<label className="label">
<span className="label-text">No Seed</span>
</label>
<input
type="number"
placeholder="100"
className="input"
value={contract.seedAmounts.NO}
onChange={(e) => {
setContract({
...contract,
seedAmounts: {
...contract.seedAmounts,
NO: parseInt(e.target.value),
},
})
}}
/>
</div>
</div>
</div>
{/* TODO: Show a preview of the created market here? */}
<div className="flex justify-end mt-6">
<button
type="submit"
className="btn btn-primary"
onClick={(e) => {
e.preventDefault()
saveContract()
}}
>
Create market
</button>
</div>
</form>
</div>
{/* Show a separate card for each contract */}
<h1 className="text-2xl font-major-mono text-indigo-300 font-bold mt-6 mb-4">
Your markets
</h1>
<ContractsList contracts={contracts} />
</div>
</div>
)
}