feat(transactions): add live energy and estimated cost to transaction data

apps/csms/src/routes/transactions.ts

@@ -2,7 +2,8 @@ import { Hono } from "hono";
 import { and, desc, eq, isNull, isNotNull, sql } from "drizzle-orm";
 import dayjs from "dayjs";
 import { useDrizzle } from "@/lib/db.js";
-import { transaction, chargePoint, connector, idTag } from "@/db/schema.js";
+import { transaction, chargePoint, connector, idTag, meterValue } from "@/db/schema.js";
+import type { SampledValue } from "@/db/schema.js";
 import { user } from "@/db/auth-schema.js";
 import { ocppConnections } from "@/ocpp/handler.js";
 import { OCPP_MESSAGE_TYPE } from "@/ocpp/types.js";
@@ -20,11 +21,13 @@ app.post("/remote-start", async (c) => {
   if (!currentUser) return c.json({ error: "Unauthorized" }, 401);
 
   const db = useDrizzle();
-  const body = await c.req.json<{
+  const body = await c.req
+    .json<{
       chargePointIdentifier: string;
       connectorId: number;
       idTag: string;
-  }>().catch(() => null);
+    }>()
+    .catch(() => null);
 
   if (
     !body ||
@@ -122,6 +125,8 @@ app.get("/", async (c) => {
     .select({
       transaction,
       chargePointIdentifier: chargePoint.chargePointIdentifier,
+      feePerKwh: chargePoint.feePerKwh,
+      pricingMode: chargePoint.pricingMode,
       connectorNumber: connector.connectorId,
       idTagUserId: idTag.userId,
       idTagUserName: user.name,
@@ -136,8 +141,61 @@ app.get("/", async (c) => {
     .limit(limit)
     .offset(offset);
 
+  // For active transactions, fetch the latest meter reading to show live energy
+  const activeTxIds = rows.filter((r) => !r.transaction.stopTimestamp).map((r) => r.transaction.id);
+
+  // Map: transactionId -> latest cumulative Wh from meterValue
+  const latestMeterMap = new Map<number, number>();
+  if (activeTxIds.length > 0) {
+    // DISTINCT ON picks the most recent row per transaction_id
+    const latestRows = await db.execute<{
+      transaction_id: number;
+      sampled_values: SampledValue[];
+    }>(sql`
+      SELECT DISTINCT ON (transaction_id) transaction_id, sampled_values
+      FROM meter_value
+      WHERE transaction_id IN (${sql.join(
+        activeTxIds.map((id) => sql`${id}`),
+        sql`, `,
+      )})
+      ORDER BY transaction_id, timestamp DESC
+    `);
+    for (const row of latestRows.rows) {
+      const svList = row.sampled_values as SampledValue[];
+      const energySv = svList.find(
+        (sv) => (!sv.measurand || sv.measurand === "Energy.Active.Import.Register") && !sv.phase,
+      );
+      if (energySv != null) {
+        // Unit defaults to Wh; kWh is also common
+        const raw = parseFloat(energySv.value);
+        if (!Number.isNaN(raw)) {
+          const wh = energySv.unit === "kWh" ? raw * 1000 : raw;
+          latestMeterMap.set(Number(row.transaction_id), wh);
+        }
+      }
+    }
+  }
+
   return c.json({
-    data: rows.map((r) => ({
+    data: rows.map((r) => {
+      const isActive = !r.transaction.stopTimestamp;
+      const latestMeterWh = isActive ? (latestMeterMap.get(r.transaction.id) ?? null) : null;
+      const liveEnergyWh =
+        latestMeterWh != null ? latestMeterWh - r.transaction.startMeterValue : null;
+
+      // Estimated cost: only for fixed pricing (TOU requires full interval analysis)
+      let estimatedCost: number | null = null;
+      if (
+        isActive &&
+        liveEnergyWh != null &&
+        liveEnergyWh > 0 &&
+        r.pricingMode === "fixed" &&
+        (r.feePerKwh ?? 0) > 0
+      ) {
+        estimatedCost = Math.ceil((liveEnergyWh * (r.feePerKwh ?? 0)) / 1000);
+      }
+
+      return {
         ...r.transaction,
         chargePointIdentifier: r.chargePointIdentifier,
         connectorNumber: r.connectorNumber,
@@ -147,7 +205,10 @@ app.get("/", async (c) => {
           r.transaction.stopMeterValue != null
             ? r.transaction.stopMeterValue - r.transaction.startMeterValue
             : null,
-    })),
+        liveEnergyWh,
+        estimatedCost,
+      };
+    }),
     total,
     page,
     totalPages: Math.max(1, Math.ceil(total / limit)),

apps/web/app/dashboard/transactions/page.tsx

@@ -153,10 +153,32 @@ export default function TransactionsPage() {
                     {formatDuration(tx.startTimestamp, tx.stopTimestamp)}
                   </Table.Cell>
                   <Table.Cell className="tabular-nums">
-                    {tx.energyWh != null ? (tx.energyWh / 1000).toFixed(3) : "—"}
+                    {tx.energyWh != null ? (
+                      (tx.energyWh / 1000).toFixed(3)
+                    ) : tx.liveEnergyWh != null ? (
+                      <span className="inline-flex items-center gap-1">
+                        {(tx.liveEnergyWh / 1000).toFixed(3)}
+                        <span className="rounded bg-warning-soft px-1 py-0.5 text-[10px] font-semibold text-warning leading-none text-nowrap">
+                          预估
+                        </span>
+                      </span>
+                    ) : (
+                      "—"
+                    )}
                   </Table.Cell>
                   <Table.Cell className="tabular-nums">
-                    {tx.chargeAmount != null ? `¥${(tx.chargeAmount / 100).toFixed(2)}` : "—"}
+                    {tx.chargeAmount != null ? (
+                      `¥${(tx.chargeAmount / 100).toFixed(2)}`
+                    ) : tx.estimatedCost != null ? (
+                      <span className="inline-flex items-center gap-1">
+                        ¥{(tx.estimatedCost / 100).toFixed(2)}
+                        <span className="rounded bg-warning-soft px-1 py-0.5 text-[10px] font-semibold text-warning leading-none text-nowrap">
+                          预估
+                        </span>
+                      </span>
+                    ) : (
+                      "—"
+                    )}
                   </Table.Cell>
                   <Table.Cell>
                     {tx.stopReason ? (

apps/web/app/globals.css

@@ -92,3 +92,9 @@
   --warning: oklch(82.03% 0.1407 76.34);
   --warning-foreground: oklch(21.03% 0.0059 76.34);
 }
+
+@layer components {
+  .chip__label {
+    @apply text-nowrap;
+  }
+}

apps/web/lib/api.ts

@@ -120,6 +120,8 @@ export type Transaction = {
   startMeterValue: number | null;
   stopMeterValue: number | null;
   energyWh: number | null;
+  liveEnergyWh: number | null;
+  estimatedCost: number | null;
   stopIdTag: string | null;
   stopReason: string | null;
   chargeAmount: number | null;