Use tRPC in group stats

src/app/groups/[groupId]/stats/page.client.tsx

@@ -0,0 +1,27 @@
+import { Totals } from '@/app/groups/[groupId]/stats/totals'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import { useTranslations } from 'next-intl'
+
+export function TotalsPageClient({ groupId }: { groupId: string }) {
+  const t = useTranslations('Stats')
+
+  return (
+    <>
+      <Card className="mb-4">
+        <CardHeader>
+          <CardTitle>{t('Totals.title')}</CardTitle>
+          <CardDescription>{t('Totals.description')}</CardDescription>
+        </CardHeader>
+        <CardContent className="flex flex-col space-y-4">
+          <Totals groupId={groupId} />
+        </CardContent>
+      </Card>
+    </>
+  )
+}

src/app/groups/[groupId]/stats/page.tsx

@@ -1,17 +1,5 @@
-import { cached } from '@/app/cached-functions'
-import { Totals } from '@/app/groups/[groupId]/stats/totals'
-import {
-  Card,
-  CardContent,
-  CardDescription,
-  CardHeader,
-  CardTitle,
-} from '@/components/ui/card'
-import { getGroupExpenses } from '@/lib/api'
-import { getTotalGroupSpending } from '@/lib/totals'
+import { TotalsPageClient } from '@/app/groups/[groupId]/stats/page.client'
 import { Metadata } from 'next'
-import { getTranslations } from 'next-intl/server'
-import { notFound } from 'next/navigation'
 
 export const metadata: Metadata = {
   title: 'Totals',
@@ -22,28 +10,5 @@ export default async function TotalsPage({
 }: {
   params: { groupId: string }
 }) {
-  const t = await getTranslations('Stats')
-  const group = await cached.getGroup(groupId)
-  if (!group) notFound()
-
-  const expenses = await getGroupExpenses(groupId)
-  const totalGroupSpendings = getTotalGroupSpending(expenses)
-
-  return (
-    <>
-      <Card className="mb-4">
-        <CardHeader>
-          <CardTitle>{t('Totals.title')}</CardTitle>
-          <CardDescription>{t('Totals.description')}</CardDescription>
-        </CardHeader>
-        <CardContent className="flex flex-col space-y-4">
-          <Totals
-            group={group}
-            expenses={expenses}
-            totalGroupSpendings={totalGroupSpendings}
-          />
-        </CardContent>
-      </Card>
-    </>
-  )
+  return <TotalsPageClient groupId={groupId} />
 }

src/app/groups/[groupId]/stats/totals-your-share.tsx

@@ -1,41 +1,27 @@
 'use client'
-import { getGroup, getGroupExpenses } from '@/lib/api'
-import { getTotalActiveUserShare } from '@/lib/totals'
 import { cn, formatCurrency } from '@/lib/utils'
 import { useLocale, useTranslations } from 'next-intl'
-import { useEffect, useState } from 'react'
 
-type Props = {
-  group: NonNullable<Awaited<ReturnType<typeof getGroup>>>
-  expenses: NonNullable<Awaited<ReturnType<typeof getGroupExpenses>>>
-}
-
-export function TotalsYourShare({ group, expenses }: Props) {
+export function TotalsYourShare({
+  totalParticipantShare = 0,
+  currency,
+}: {
+  totalParticipantShare?: number
+  currency: string
+}) {
   const locale = useLocale()
   const t = useTranslations('Stats.Totals')
-  const [activeUser, setActiveUser] = useState('')
-
-  useEffect(() => {
-    const activeUser = localStorage.getItem(`${group.id}-activeUser`)
-    if (activeUser) setActiveUser(activeUser)
-  }, [group, expenses])
-
-  const totalActiveUserShare =
-    activeUser === '' || activeUser === 'None'
-      ? 0
-      : getTotalActiveUserShare(activeUser, expenses)
-  const currency = group.currency
 
   return (
     <div>
       <div className="text-muted-foreground">{t('yourShare')}</div>
       <div
         className={cn(
           'text-lg',
-          totalActiveUserShare < 0 ? 'text-green-600' : 'text-red-600',
+          totalParticipantShare < 0 ? 'text-green-600' : 'text-red-600',
         )}
       >
-        {formatCurrency(currency, Math.abs(totalActiveUserShare), locale)}
+        {formatCurrency(currency, Math.abs(totalParticipantShare), locale)}
       </div>
     </div>
   )

src/app/groups/[groupId]/stats/totals-your-spending.tsx

@@ -1,26 +1,19 @@
 'use client'
-import { getGroup, getGroupExpenses } from '@/lib/api'
-import { useActiveUser } from '@/lib/hooks'
-import { getTotalActiveUserPaidFor } from '@/lib/totals'
 import { cn, formatCurrency } from '@/lib/utils'
 import { useLocale, useTranslations } from 'next-intl'
 
-type Props = {
-  group: NonNullable<Awaited<ReturnType<typeof getGroup>>>
-  expenses: NonNullable<Awaited<ReturnType<typeof getGroupExpenses>>>
-}
-
-export function TotalsYourSpendings({ group, expenses }: Props) {
+export function TotalsYourSpendings({
+  totalParticipantSpendings = 0,
+  currency,
+}: {
+  totalParticipantSpendings?: number
+  currency: string
+}) {
   const locale = useLocale()
   const t = useTranslations('Stats.Totals')
-  const activeUser = useActiveUser(group.id)
 
-  const totalYourSpendings =
-    activeUser === '' || activeUser === 'None'
-      ? 0
-      : getTotalActiveUserPaidFor(activeUser, expenses)
-  const currency = group.currency
-  const balance = totalYourSpendings < 0 ? 'yourEarnings' : 'yourSpendings'
+  const balance =
+    totalParticipantSpendings < 0 ? 'yourEarnings' : 'yourSpendings'
 
   return (
     <div>
@@ -29,10 +22,10 @@ export function TotalsYourSpendings({ group, expenses }: Props) {
       <div
         className={cn(
           'text-lg',
-          totalYourSpendings < 0 ? 'text-green-600' : 'text-red-600',
+          totalParticipantSpendings < 0 ? 'text-green-600' : 'text-red-600',
         )}
       >
-        {formatCurrency(currency, Math.abs(totalYourSpendings), locale)}
+        {formatCurrency(currency, Math.abs(totalParticipantSpendings), locale)}
       </div>
     </div>
   )

src/app/groups/[groupId]/stats/totals.tsx

@@ -2,30 +2,53 @@
 import { TotalsGroupSpending } from '@/app/groups/[groupId]/stats/totals-group-spending'
 import { TotalsYourShare } from '@/app/groups/[groupId]/stats/totals-your-share'
 import { TotalsYourSpendings } from '@/app/groups/[groupId]/stats/totals-your-spending'
-import { getGroup, getGroupExpenses } from '@/lib/api'
+import { Skeleton } from '@/components/ui/skeleton'
 import { useActiveUser } from '@/lib/hooks'
+import { trpc } from '@/trpc/client'
 
-export function Totals({
-  group,
-  expenses,
-  totalGroupSpendings,
-}: {
-  group: NonNullable<Awaited<ReturnType<typeof getGroup>>>
-  expenses: NonNullable<Awaited<ReturnType<typeof getGroupExpenses>>>
-  totalGroupSpendings: number
-}) {
-  const activeUser = useActiveUser(group.id)
+export function Totals({ groupId }: { groupId: string }) {
+  const activeUser = useActiveUser(groupId)
+
+  const participantId =
+    activeUser && activeUser !== 'None' ? activeUser : undefined
+  const { data } = trpc.groups.stats.get.useQuery({ groupId, participantId })
+  const { data: groupData } = trpc.groups.get.useQuery({ groupId })
+
+  if (!data || !groupData)
+    return (
+      <div className="flex flex-col gap-7">
+        {[0, 1, 2].map((index) => (
+          <div key={index}>
+            <Skeleton className="mt-1 h-3 w-48" />
+            <Skeleton className="mt-3 h-4 w-20" />
+          </div>
+        ))}
+      </div>
+    )
+
+  const {
+    totalGroupSpendings,
+    totalParticipantShare,
+    totalParticipantSpendings,
+  } = data
+  const { group } = groupData
 
   return (
     <>
       <TotalsGroupSpending
         totalGroupSpendings={totalGroupSpendings}
         currency={group.currency}
       />
-      {activeUser && activeUser !== 'None' && (
+      {participantId && (
         <>
-          <TotalsYourSpendings group={group} expenses={expenses} />
-          <TotalsYourShare group={group} expenses={expenses} />
+          <TotalsYourSpendings
+            totalParticipantSpendings={totalParticipantSpendings}
+            currency={group.currency}
+          />
+          <TotalsYourShare
+            totalParticipantShare={totalParticipantShare}
+            currency={group.currency}
+          />
         </>
       )}
     </>

src/trpc/routers/groups/index.ts

@@ -2,11 +2,13 @@ import { createTRPCRouter } from '@/trpc/init'
 import { groupBalancesRouter } from '@/trpc/routers/groups/balances'
 import { groupExpensesRouter } from '@/trpc/routers/groups/expenses'
 import { getGroupProcedure } from '@/trpc/routers/groups/get.procedure'
+import { groupStatsRouter } from '@/trpc/routers/groups/stats'
 import { updateGroupProcedure } from '@/trpc/routers/groups/update.procedure'
 
 export const groupsRouter = createTRPCRouter({
   expenses: groupExpensesRouter,
   balances: groupBalancesRouter,
+  stats: groupStatsRouter,
 
   get: getGroupProcedure,
   update: updateGroupProcedure,

src/trpc/routers/groups/stats/get.procedure.ts

@@ -0,0 +1,35 @@
+import { getGroupExpenses } from '@/lib/api'
+import {
+  getTotalActiveUserPaidFor,
+  getTotalActiveUserShare,
+  getTotalGroupSpending,
+} from '@/lib/totals'
+import { baseProcedure } from '@/trpc/init'
+import { z } from 'zod'
+
+export const getGroupStatsProcedure = baseProcedure
+  .input(
+    z.object({
+      groupId: z.string().min(1),
+      participantId: z.string().optional(),
+    }),
+  )
+  .query(async ({ input: { groupId, participantId } }) => {
+    const expenses = await getGroupExpenses(groupId)
+    const totalGroupSpendings = getTotalGroupSpending(expenses)
+
+    const totalParticipantSpendings =
+      participantId !== undefined
+        ? getTotalActiveUserPaidFor(participantId, expenses)
+        : undefined
+    const totalParticipantShare =
+      participantId !== undefined
+        ? getTotalActiveUserShare(participantId, expenses)
+        : undefined
+
+    return {
+      totalGroupSpendings,
+      totalParticipantSpendings,
+      totalParticipantShare,
+    }
+  })

src/trpc/routers/groups/stats/index.ts

@@ -0,0 +1,6 @@
+import { createTRPCRouter } from '@/trpc/init'
+import { getGroupStatsProcedure } from '@/trpc/routers/groups/stats/get.procedure'
+
+export const groupStatsRouter = createTRPCRouter({
+  get: getGroupStatsProcedure,
+})