R46 A1-A7：落地绩效考核模块首版

server/src/services/employeeStats.js

@@ -6,6 +6,22 @@ function addDays(date, days) {
   return next;
 }
 
+function toNumber(value) {
+  return value == null ? null : Number(value);
+}
+
+function buildPerformanceDistribution(rows) {
+  const countByScore = new Map(rows.map((item) => [toNumber(item.overall_score), item._count._all]));
+  const items = [];
+  for (let score = 1; score <= 5; score += 0.5) {
+    items.push({
+      score: Number(score.toFixed(1)),
+      count: countByScore.get(Number(score.toFixed(1))) ?? 0,
+    });
+  }
+  return items;
+}
+
 async function buildEmployeeStats(prisma, options = {}) {
   const timeZone = options.timeZone ?? "Asia/Shanghai";
   const todayString = currentDateString(timeZone);
@@ -14,7 +30,7 @@ async function buildEmployeeStats(prisma, options = {}) {
   const next30DateTo = addDays(today, 30);
   const activeEmployeeWhere = { status: "active" };
 
-  const [employmentStatusRows, departmentRows, departments, recentHires, recentDepartures, expiringContracts, validCertificateHolders, expiringCertificates] = await Promise.all([
+  const [employmentStatusRows, departmentRows, departments, recentHires, recentDepartures, expiringContracts, validCertificateHolders, expiringCertificates, activeCycle, completedCycle] = await Promise.all([
     prisma.employee.groupBy({
       by: ["employment_status"],
       where: activeEmployeeWhere,
@@ -78,9 +94,53 @@ async function buildEmployeeStats(prisma, options = {}) {
         },
       },
     }),
+    prisma.performanceReviewCycle.findFirst({
+      where: { status: "active" },
+      orderBy: [{ activated_at: "desc" }, { start_date: "desc" }],
+    }),
+    prisma.performanceReviewCycle.findFirst({
+      where: { status: "completed" },
+      orderBy: [{ completed_at: "desc" }, { end_date: "desc" }],
+    }),
   ]);
 
   const departmentMap = new Map(departments.map((item) => [item.id, item.name]));
+  const performanceCycle = activeCycle ?? completedCycle ?? null;
+  let performanceSummary = {
+    cycle: null,
+    averageScore: null,
+    reviewedCount: 0,
+    distribution: [],
+  };
+
+  if (performanceCycle) {
+    const [reviewAggregate, reviewDistribution] = await Promise.all([
+      prisma.performanceReview.aggregate({
+        where: { cycle_id: performanceCycle.id },
+        _avg: { overall_score: true },
+        _count: { _all: true },
+      }),
+      prisma.performanceReview.groupBy({
+        by: ["overall_score"],
+        where: { cycle_id: performanceCycle.id },
+        _count: { _all: true },
+      }),
+    ]);
+
+    performanceSummary = {
+      cycle: {
+        id: performanceCycle.id,
+        name: performanceCycle.name,
+        cycleType: performanceCycle.cycle_type,
+        status: performanceCycle.status,
+        startDate: performanceCycle.start_date?.toISOString?.()?.slice(0, 10) ?? null,
+        endDate: performanceCycle.end_date?.toISOString?.()?.slice(0, 10) ?? null,
+      },
+      averageScore: toNumber(reviewAggregate._avg.overall_score),
+      reviewedCount: reviewAggregate._count._all,
+      distribution: buildPerformanceDistribution(reviewDistribution),
+    };
+  }
 
   return {
     asOfDate: todayString,
@@ -117,6 +177,7 @@ async function buildEmployeeStats(prisma, options = {}) {
       validHolderCount: validCertificateHolders.length,
       expiringSoonCount: expiringCertificates,
     },
+    performanceSummary,
   };
 }