manifold/web/hooks/use-group.ts

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import { useEffect, useState } from 'react'
import { Group } from 'common/group'
import { User } from 'common/user'
import {
getGroupsWithContractId,
listenForGroup,
listenForGroups,
listenForMemberGroups,
} from 'web/lib/firebase/groups'
import { getUser } from 'web/lib/firebase/users'
export const useGroup = (groupId: string | undefined) => {
const [group, setGroup] = useState<Group | null | undefined>()
useEffect(() => {
if (groupId) return listenForGroup(groupId, setGroup)
}, [groupId])
return group
}
export const useGroups = () => {
const [groups, setGroups] = useState<Group[] | undefined>()
useEffect(() => {
return listenForGroups(setGroups)
}, [])
return groups
}
export const useMemberGroups = (user: User | null | undefined) => {
const [memberGroups, setMemberGroups] = useState<Group[] | undefined>()
useEffect(() => {
if (user) return listenForMemberGroups(user.id, setMemberGroups)
}, [user])
return memberGroups
}
// Note: We cache member group ids in localstorage to speed up the initial load
export const useMemberGroupIds = (user: User | null | undefined) => {
const [memberGroupIds, setMemberGroupIds] = useState<string[] | undefined>(
undefined
)
useEffect(() => {
if (user) {
const key = `member-groups-${user.id}`
const memberGroupJson = localStorage.getItem(key)
if (memberGroupJson) {
setMemberGroupIds(JSON.parse(memberGroupJson))
}
return listenForMemberGroups(user.id, (Groups) => {
const groupIds = Groups.map((group) => group.id)
setMemberGroupIds(groupIds)
localStorage.setItem(key, JSON.stringify(groupIds))
})
}
}, [user])
return memberGroupIds
}
export function useMembers(group: Group) {
const [members, setMembers] = useState<User[]>([])
useEffect(() => {
const { memberIds } = group
if (memberIds.length > 0) {
listMembers(group).then((members) => setMembers(members))
}
}, [group])
return members
}
export async function listMembers(group: Group) {
return await Promise.all(group.memberIds.map(getUser))
}
export const useGroupsWithContract = (contractId: string | undefined) => {
const [groups, setGroups] = useState<Group[] | null | undefined>()
useEffect(() => {
if (contractId) getGroupsWithContractId(contractId, setGroups)
}, [contractId])
return groups
}