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fix(merchants): net spend accounting for refunds/credits

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- Merchant totals now show net spend (gross debits minus refunds)
- Refund count and amount shown in profile drawer and table
- Scatter plot Y-axis uses net_spend, X-axis uses debit_count
- Per-merchant transaction history includes refunds (shown as negative)
- Monthly trend chart reflects net spend per month
This commit is contained in:
siddharthd
2026-03-10 00:43:58 +11:00
parent dd11019fdf
commit 7b3fd4b65f
4 changed files with 93 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/app/api/analytics/merchants/[merchant]/route.ts
+5 -3
View File
@@ -31,8 +31,10 @@ export async function GET(
t.amount,
t.amount_aud,
CASE
WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100
ELSE COALESCE(t.amount_aud, t.amount)
WHEN t.transaction_type IN ('refund', 'credit') THEN
-(CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END)
ELSE
(CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END)
END::numeric(10,2) as my_amount,
t.transaction_type,
COALESCE(o.category_override, t.category) as category,
@@ -43,7 +45,7 @@ export async function GET(
LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
LEFT JOIN transaction_splits ts ON ts.transaction_id = t.id AND ts.participant_id = $1
WHERE s.owner_id = $1
AND t.transaction_type IN ('debit', 'fee')
AND t.transaction_type IN ('debit', 'fee', 'interest', 'refund', 'credit')
AND COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name, t.description) = $2
ORDER BY t.transaction_date DESC
LIMIT 500
src/app/api/analytics/merchants/route.ts
+45 -35
View File
@@ -2,6 +2,16 @@ import { NextRequest, NextResponse } from "next/server";
import { getCurrentUser } from "@/lib/auth";
import { queryRaw } from "@/lib/db";
// Split-adjusted amount helper (positive for spend, negative for refunds)
const SPEND_EXPR = `
CASE
WHEN t.transaction_type IN ('refund', 'credit') THEN
-(CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END)
ELSE
(CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END)
END
`;
export async function GET(req: NextRequest) {
const user = await getCurrentUser(req);
if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
@@ -13,13 +23,16 @@ export async function GET(req: NextRequest) {
cutoff.setMonth(cutoff.getMonth() - months);
const fromDate = cutoff.toISOString().slice(0, 10);
// Merchant aggregates — split-adjusted, debit transactions only
// Merchant aggregates — net spend (debits + fees - refunds/credits)
const rows = await queryRaw<{
merchant: string;
category: string;
transaction_count: number;
total_spend: number;
avg_transaction: number;
debit_count: number;
refund_count: number;
gross_spend: number;
total_refunds: number;
net_spend: number;
avg_debit: number;
first_seen: string;
last_seen: string;
months_active: number;
@@ -27,19 +40,24 @@ export async function GET(req: NextRequest) {
SELECT
COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name, t.description) as merchant,
MODE() WITHIN GROUP (ORDER BY COALESCE(o.category_override, t.category)) as category,
COUNT(*)::int as transaction_count,
SUM(
CASE
WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100
ELSE COALESCE(t.amount_aud, t.amount)
END
)::numeric(12,2) as total_spend,
COUNT(*) FILTER (WHERE t.transaction_type IN ('debit', 'fee', 'interest'))::int as debit_count,
COUNT(*) FILTER (WHERE t.transaction_type IN ('refund', 'credit'))::int as refund_count,
COALESCE(SUM(
CASE WHEN t.transaction_type IN ('debit', 'fee', 'interest') THEN
CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END
ELSE 0 END
), 0)::numeric(12,2) as gross_spend,
COALESCE(SUM(
CASE WHEN t.transaction_type IN ('refund', 'credit') THEN
CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END
ELSE 0 END
), 0)::numeric(12,2) as total_refunds,
SUM(${SPEND_EXPR})::numeric(12,2) as net_spend,
AVG(
CASE
WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100
ELSE COALESCE(t.amount_aud, t.amount)
CASE WHEN t.transaction_type IN ('debit', 'fee', 'interest') THEN
CASE WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100 ELSE COALESCE(t.amount_aud, t.amount) END
END
)::numeric(10,2) as avg_transaction,
)::numeric(10,2) as avg_debit,
MIN(t.transaction_date)::text as first_seen,
MAX(t.transaction_date)::text as last_seen,
COUNT(DISTINCT TO_CHAR(DATE_TRUNC('month', t.transaction_date::date), 'YYYY-MM'))::int as months_active
@@ -48,21 +66,16 @@ export async function GET(req: NextRequest) {
LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
LEFT JOIN transaction_splits ts ON ts.transaction_id = t.id AND ts.participant_id = $1
WHERE s.owner_id = $1
AND t.transaction_type IN ('debit', 'fee')
AND t.transaction_type IN ('debit', 'fee', 'interest', 'refund', 'credit')
AND t.transaction_date >= $2
AND COALESCE(o.category_override, t.category) NOT IN ('transfers', 'investment')
GROUP BY 1
HAVING SUM(
CASE
WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100
ELSE COALESCE(t.amount_aud, t.amount)
END
) > 0
ORDER BY total_spend DESC
HAVING SUM(${SPEND_EXPR}) > 0
ORDER BY net_spend DESC
LIMIT 200
`, [user.id, fromDate]);
// Monthly trend per merchant (top 50 by spend)
// Monthly net trend per merchant (top 50 by net spend)
const topMerchants = rows.slice(0, 50).map((r) => r.merchant);
interface TrendRow { merchant: string; month: string; total: number }
@@ -72,18 +85,13 @@ export async function GET(req: NextRequest) {
SELECT
COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name, t.description) as merchant,
TO_CHAR(DATE_TRUNC('month', t.transaction_date::date), 'YYYY-MM') as month,
SUM(
CASE
WHEN ts.share_percent IS NOT NULL THEN COALESCE(t.amount_aud, t.amount) * ts.share_percent / 100
ELSE COALESCE(t.amount_aud, t.amount)
END
)::numeric(10,2) as total
SUM(${SPEND_EXPR})::numeric(10,2) as total
FROM transactions t
JOIN statements s ON s.id = t.statement_id
LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
LEFT JOIN transaction_splits ts ON ts.transaction_id = t.id AND ts.participant_id = $1
WHERE s.owner_id = $1
AND t.transaction_type IN ('debit', 'fee')
AND t.transaction_type IN ('debit', 'fee', 'interest', 'refund', 'credit')
AND t.transaction_date >= $2
AND COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name, t.description) = ANY($3)
AND COALESCE(o.category_override, t.category) NOT IN ('transfers', 'investment')
@@ -92,7 +100,6 @@ export async function GET(req: NextRequest) {
`, [user.id, fromDate, topMerchants]);
}
// Group trend data by merchant
const trendByMerchant: Record<string, Record<string, number>> = {};
for (const tr of trendRows) {
if (!trendByMerchant[tr.merchant]) trendByMerchant[tr.merchant] = {};
@@ -101,9 +108,12 @@ export async function GET(req: NextRequest) {
const merchants = rows.map((r) => ({
...r,
transaction_count: Number(r.transaction_count),
total_spend: Number(r.total_spend),
avg_transaction: Number(r.avg_transaction),
debit_count: Number(r.debit_count),
refund_count: Number(r.refund_count),
gross_spend: Number(r.gross_spend),
total_refunds: Number(r.total_refunds),
net_spend: Number(r.net_spend),
avg_debit: Number(r.avg_debit),
months_active: Number(r.months_active),
monthly_trend: trendByMerchant[r.merchant] || {},
}));
src/app/merchants/page.tsx
+37 -19
View File
@@ -77,9 +77,12 @@ function ScatterTooltip({
<p className="font-semibold text-white truncate">{d.merchant}</p>
<p className="text-zinc-400 text-xs mt-0.5">{formatCategory(d.category)}</p>
<div className="mt-2 space-y-1 text-zinc-300">
<p>{fmt(d.total_spend)} total</p>
<p>{d.transaction_count}× transactions</p>
<p>{fmtExact(d.avg_transaction)} avg</p>
<p>{fmt(d.net_spend)} net</p>
{d.refund_count > 0 && (
<p className="text-emerald-400 text-xs">{d.refund_count} refund(s) −{fmt(d.total_refunds)}</p>
)}
<p>{d.debit_count}× transactions</p>
<p>{fmtExact(d.avg_debit)} avg</p>
</div>
</div>
);
@@ -156,18 +159,30 @@ function MerchantProfile({
{/* Stats */}
<div className="grid grid-cols-3 gap-3 p-5 border-b border-zinc-800">
<div className="bg-zinc-800 rounded-lg p-3 text-center">
<p className="text-xs text-zinc-400 mb-1">Total Spent</p>
<p className="text-white font-semibold">{fmt(merchant.total_spend)}</p>
<p className="text-xs text-zinc-400 mb-1">Net Spent</p>
<p className="text-white font-semibold">{fmt(merchant.net_spend)}</p>
</div>
<div className="bg-zinc-800 rounded-lg p-3 text-center">
<p className="text-xs text-zinc-400 mb-1">Transactions</p>
<p className="text-white font-semibold">{merchant.transaction_count}</p>
<p className="text-xs text-zinc-400 mb-1">Avg per Visit</p>
<p className="text-white font-semibold">{fmtExact(merchant.avg_debit)}</p>
</div>
<div className="bg-zinc-800 rounded-lg p-3 text-center">
<p className="text-xs text-zinc-400 mb-1">Average</p>
<p className="text-white font-semibold">{fmtExact(merchant.avg_transaction)}</p>
<p className="text-xs text-zinc-400 mb-1">Visits</p>
<p className="text-white font-semibold">{merchant.debit_count}</p>
</div>
</div>
{/* Refund callout — only show if there are refunds */}
{merchant.refund_count > 0 && (
<div className="mx-5 mt-3 px-3 py-2 rounded-lg bg-emerald-900/20 border border-emerald-800/40 flex items-center justify-between text-sm">
<span className="text-emerald-400">
{merchant.refund_count} refund{merchant.refund_count > 1 ? "s" : ""}
</span>
<span className="text-zinc-300">
<span className="text-zinc-500 mr-2">gross {fmt(merchant.gross_spend)} − refunds</span>
<span className="text-emerald-400 font-medium">−{fmt(merchant.total_refunds)}</span>
</span>
</div>
)}
{/* Trend chart */}
{trendData.length > 1 && (
@@ -250,12 +265,12 @@ export default function MerchantsPage() {
// Stats for median lines
const { medianX, medianY } = useMemo(() => {
if (merchants.length === 0) return { medianX: 0, medianY: 0 };
const counts = [...merchants].sort((a, b) => a.transaction_count - b.transaction_count);
const spends = [...merchants].sort((a, b) => a.total_spend - b.total_spend);
const counts = [...merchants].sort((a, b) => a.debit_count - b.debit_count);
const spends = [...merchants].sort((a, b) => a.net_spend - b.net_spend);
const mid = Math.floor(merchants.length / 2);
return {
medianX: counts[mid]?.transaction_count ?? 0,
medianY: spends[mid]?.total_spend ?? 0,
medianX: counts[mid]?.debit_count ?? 0,
medianY: spends[mid]?.net_spend ?? 0,
};
}, [merchants]);
@@ -307,7 +322,7 @@ export default function MerchantsPage() {
<ScatterChart margin={{ top: 10, right: 20, bottom: 20, left: 10 }}>
<CartesianGrid stroke="#27272a" strokeDasharray="3 3" />
<XAxis
dataKey="transaction_count"
dataKey="debit_count"
name="Transactions"
type="number"
tick={{ fill: "#71717a", fontSize: 11 }}
@@ -316,8 +331,8 @@ export default function MerchantsPage() {
label={{ value: "Transaction Count", position: "insideBottom", offset: -10, fill: "#52525b", fontSize: 11 }}
/>
<YAxis
dataKey="total_spend"
name="Total Spend"
dataKey="net_spend"
name="Net Spend"
type="number"
tick={{ fill: "#71717a", fontSize: 11 }}
axisLine={false}
@@ -404,11 +419,14 @@ export default function MerchantsPage() {
</span>
</td>
<td className="px-4 py-2.5 text-right text-white font-medium">
{fmt(m.total_spend)}
{fmt(m.net_spend)}
{m.refund_count > 0 && (
<span className="ml-1.5 text-emerald-400 text-xs">↩{m.refund_count}</span>
)}
</td>
<td className="px-4 py-2.5 text-right text-zinc-400">{m.transaction_count}</td>
<td className="px-4 py-2.5 text-right text-zinc-400">{m.debit_count}</td>
<td className="px-4 py-2.5 text-right text-zinc-400">
{fmtExact(m.avg_transaction)}
{fmtExact(m.avg_debit)}
</td>
<td className="px-4 py-2.5 text-right text-zinc-500 text-xs hidden sm:table-cell">
{fmtDate(m.last_seen)}
src/lib/hooks.ts
+6 -3
View File
@@ -562,9 +562,12 @@ export function useFees() {
export interface MerchantRow {
merchant: string;
category: string;
transaction_count: number;
total_spend: number;
avg_transaction: number;
debit_count: number;
refund_count: number;
gross_spend: number;
total_refunds: number;
net_spend: number;
avg_debit: number;
first_seen: string;
last_seen: string;
months_active: number;