Update groups API

docs/docs/api.md

@@ -54,6 +54,10 @@ Returns the authenticated user.
 
 Gets all groups, in no particular order.
 
+Parameters:
+- `availableToUserId`: Optional. if specified, only groups that the user can
+  join and groups they've already joined will be returned.
+
 Requires no authorization.
 
 ### `GET /v0/groups/[slug]`
@@ -62,12 +66,18 @@ Gets a group by its slug.
 
 Requires no authorization.
 
-### `GET /v0/groups/by-id/[id]`
+### `GET /v0/group/by-id/[id]`
 
 Gets a group by its unique ID.
 
 Requires no authorization.
 
+### `GET /v0/group/by-id/[id]/markets`
+
+Gets a group's markets by its unique ID.
+
+Requires no authorization.
+
 ### `GET /v0/markets`
 
 Lists all markets, ordered by creation date descending.

web/lib/firebase/groups.ts

@@ -11,7 +11,7 @@ import {
   updateDoc,
   where,
 } from 'firebase/firestore'
-import { uniq } from 'lodash'
+import { uniq, uniqBy } from 'lodash'
 import { Group, GROUP_CHAT_SLUG, GroupLink } from 'common/group'
 import {
   coll,
@@ -21,7 +21,7 @@ import {
   listenForValues,
 } from './utils'
 import { Contract } from 'common/contract'
-import { updateContract } from 'web/lib/firebase/contracts'
+import { getContractFromId, updateContract } from 'web/lib/firebase/contracts'
 import { db } from 'web/lib/firebase/init'
 import { filterDefined } from 'common/util/array'
 import { getUser } from 'web/lib/firebase/users'
@@ -31,6 +31,9 @@ export const groupMembers = (groupId: string) =>
   collection(groups, groupId, 'groupMembers')
 export const groupContracts = (groupId: string) =>
   collection(groups, groupId, 'groupContracts')
+const openGroupsQuery = query(groups, where('anyoneCanJoin', '==', true))
+const memberGroupsQuery = (userId: string) =>
+  query(collectionGroup(db, 'groupMembers'), where('userId', '==', userId))
 
 export function groupPath(
   groupSlug: string,
@@ -78,23 +81,24 @@ export function listenForGroupContractDocs(
   return listenForValues(groupContracts(groupId), setContractDocs)
 }
 
-export function listenForOpenGroups(setGroups: (groups: Group[]) => void) {
-  return listenForValues(
-    query(groups, where('anyoneCanJoin', '==', true)),
-    setGroups
+export async function listGroupContracts(groupId: string) {
+  const contractDocs = await getValues<{
+    contractId: string
+    createdTime: number
+  }>(groupContracts(groupId))
+  return Promise.all(
+    contractDocs.map((doc) => getContractFromId(doc.contractId))
   )
 }
 
+export function listenForOpenGroups(setGroups: (groups: Group[]) => void) {
+  return listenForValues(openGroupsQuery, setGroups)
+}
+
 export function getGroup(groupId: string) {
   return getValue<Group>(doc(groups, groupId))
 }
 
-export function getGroupContracts(groupId: string) {
-  return getValues<{ contractId: string; createdTime: number }>(
-    groupContracts(groupId)
-  )
-}
-
 export async function getGroupBySlug(slug: string) {
   const q = query(groups, where('slug', '==', slug))
   const docs = (await getDocs(q)).docs
@@ -112,10 +116,7 @@ export function listenForMemberGroupIds(
   userId: string,
   setGroupIds: (groupIds: string[]) => void
 ) {
-  const q = query(
-    collectionGroup(db, 'groupMembers'),
-    where('userId', '==', userId)
-  )
+  const q = memberGroupsQuery(userId)
   return onSnapshot(q, { includeMetadataChanges: true }, (snapshot) => {
     if (snapshot.metadata.fromCache) return
 
@@ -136,6 +137,24 @@ export function listenForMemberGroups(
   })
 }
 
+export async function listAvailableGroups(userId: string) {
+  const [openGroups, memberGroupSnapshot] = await Promise.all([
+    getValues<Group>(openGroupsQuery),
+    getDocs(memberGroupsQuery(userId)),
+  ])
+  const memberGroups = filterDefined(
+    await Promise.all(
+      memberGroupSnapshot.docs.map((doc) => {
+        return doc.ref.parent.parent?.id
+          ? getGroup(doc.ref.parent.parent?.id)
+          : null
+      })
+    )
+  )
+
+  return uniqBy([...openGroups, ...memberGroups], (g) => g.id)
+}
+
 export async function addUserToGroupViaId(groupId: string, userId: string) {
   // get group to get the member ids
   const group = await getGroup(groupId)

web/pages/api/v0/group/by-id/[id]/markets.ts

@@ -0,0 +1,18 @@
+import { NextApiRequest, NextApiResponse } from 'next'
+import { applyCorsHeaders, CORS_UNRESTRICTED } from 'web/lib/api/cors'
+import { listGroupContracts } from 'web/lib/firebase/groups'
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  await applyCorsHeaders(req, res, CORS_UNRESTRICTED)
+  const { id } = req.query
+  const contracts = await listGroupContracts(id as string)
+  if (!contracts) {
+    res.status(404).json({ error: 'Group not found' })
+    return
+  }
+  res.setHeader('Cache-Control', 'no-cache')
+  return res.status(200).json(contracts)
+}

web/pages/api/v0/groups.ts

@@ -1,14 +1,42 @@
 import type { NextApiRequest, NextApiResponse } from 'next'
-import { listAllGroups } from 'web/lib/firebase/groups'
+import { listAllGroups, listAvailableGroups } from 'web/lib/firebase/groups'
 import { applyCorsHeaders, CORS_UNRESTRICTED } from 'web/lib/api/cors'
+import { z } from 'zod'
+import { validate } from 'web/pages/api/v0/_validate'
+import { ValidationError } from 'web/pages/api/v0/_types'
 
-type Data = any[]
+const queryParams = z
+  .object({
+    availableToUserId: z.string().optional(),
+  })
+  .strict()
 
 export default async function handler(
   req: NextApiRequest,
-  res: NextApiResponse<Data>
+  res: NextApiResponse
 ) {
   await applyCorsHeaders(req, res, CORS_UNRESTRICTED)
+  let params: z.infer<typeof queryParams>
+  try {
+    params = validate(queryParams, req.query)
+  } catch (e) {
+    if (e instanceof ValidationError) {
+      return res.status(400).json(e)
+    }
+    console.error(`Unknown error during validation: ${e}`)
+    return res.status(500).json({ error: 'Unknown error during validation' })
+  }
+
+  const { availableToUserId } = params
+
+  // TODO: should we check if the user is a real user?
+  if (availableToUserId) {
+    const groups = await listAvailableGroups(availableToUserId)
+    res.setHeader('Cache-Control', 'max-age=0')
+    res.status(200).json(groups)
+    return
+  }
+
   const groups = await listAllGroups()
   res.setHeader('Cache-Control', 'max-age=0')
   res.status(200).json(groups)